/build/source/llvm/lib/Target/PowerPC/PPCISelLowering.cpp

Bug Summary

File:	build/source/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
Warning:	line 10052, column 31 1st function call argument is an uninitialized value
Annotated Source Code

Press '?' to see keyboard shortcuts
Show analyzer invocation
clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name PPCISelLowering.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -fmath-errno -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/source/build-llvm/tools/clang/stage2-bins -resource-dir /usr/lib/llvm-17/lib/clang/17 -D _DEBUG -D _GLIBCXX_ASSERTIONS -D _GNU_SOURCE -D _LIBCPP_ENABLE_ASSERTIONS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I lib/Target/PowerPC -I /build/source/llvm/lib/Target/PowerPC -I include -I /build/source/llvm/include -D _FORTIFY_SOURCE=2 -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-17/lib/clang/17/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fmacro-prefix-map=/build/source/= -fcoverage-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fcoverage-prefix-map=/build/source/= -source-date-epoch 1683717183 -O2 -Wno-unused-command-line-argument -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -Wno-misleading-indentation -std=c++17 -fdeprecated-macro -fdebug-compilation-dir=/build/source/build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/source/build-llvm/tools/clang/stage2-bins=build-llvm/tools/clang/stage2-bins -fdebug-prefix-map=/build/source/= -ferror-limit 19 -fvisibility=hidden -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2023-05-10-133810-16478-1 -x c++ /build/source/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
1//===-- PPCISelLowering.cpp - PPC DAG Lowering Implementation -------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the PPCISelLowering class.
10//
11//===----------------------------------------------------------------------===//

13#include "PPCISelLowering.h"
14#include "MCTargetDesc/PPCPredicates.h"
15#include "PPC.h"
16#include "PPCCCState.h"
17#include "PPCCallingConv.h"
18#include "PPCFrameLowering.h"
19#include "PPCInstrInfo.h"
20#include "PPCMachineFunctionInfo.h"
21#include "PPCPerfectShuffle.h"
22#include "PPCRegisterInfo.h"
23#include "PPCSubtarget.h"
24#include "PPCTargetMachine.h"
25#include "llvm/ADT/APFloat.h"
26#include "llvm/ADT/APInt.h"
27#include "llvm/ADT/ArrayRef.h"
28#include "llvm/ADT/DenseMap.h"
29#include "llvm/ADT/STLExtras.h"
30#include "llvm/ADT/SmallPtrSet.h"
31#include "llvm/ADT/SmallSet.h"
32#include "llvm/ADT/SmallVector.h"
33#include "llvm/ADT/Statistic.h"
34#include "llvm/ADT/StringRef.h"
35#include "llvm/ADT/StringSwitch.h"
36#include "llvm/CodeGen/CallingConvLower.h"
37#include "llvm/CodeGen/ISDOpcodes.h"
38#include "llvm/CodeGen/MachineBasicBlock.h"
39#include "llvm/CodeGen/MachineFrameInfo.h"
40#include "llvm/CodeGen/MachineFunction.h"
41#include "llvm/CodeGen/MachineInstr.h"
42#include "llvm/CodeGen/MachineInstrBuilder.h"
43#include "llvm/CodeGen/MachineJumpTableInfo.h"
44#include "llvm/CodeGen/MachineLoopInfo.h"
45#include "llvm/CodeGen/MachineMemOperand.h"
46#include "llvm/CodeGen/MachineModuleInfo.h"
47#include "llvm/CodeGen/MachineOperand.h"
48#include "llvm/CodeGen/MachineRegisterInfo.h"
49#include "llvm/CodeGen/MachineValueType.h"
50#include "llvm/CodeGen/RuntimeLibcalls.h"
51#include "llvm/CodeGen/SelectionDAG.h"
52#include "llvm/CodeGen/SelectionDAGNodes.h"
53#include "llvm/CodeGen/TargetInstrInfo.h"
54#include "llvm/CodeGen/TargetLowering.h"
55#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
56#include "llvm/CodeGen/TargetRegisterInfo.h"
57#include "llvm/CodeGen/ValueTypes.h"
58#include "llvm/IR/CallingConv.h"
59#include "llvm/IR/Constant.h"
60#include "llvm/IR/Constants.h"
61#include "llvm/IR/DataLayout.h"
62#include "llvm/IR/DebugLoc.h"
63#include "llvm/IR/DerivedTypes.h"
64#include "llvm/IR/Function.h"
65#include "llvm/IR/GlobalValue.h"
66#include "llvm/IR/IRBuilder.h"
67#include "llvm/IR/Instructions.h"
68#include "llvm/IR/Intrinsics.h"
69#include "llvm/IR/IntrinsicsPowerPC.h"
70#include "llvm/IR/Module.h"
71#include "llvm/IR/Type.h"
72#include "llvm/IR/Use.h"
73#include "llvm/IR/Value.h"
74#include "llvm/MC/MCContext.h"
75#include "llvm/MC/MCExpr.h"
76#include "llvm/MC/MCRegisterInfo.h"
77#include "llvm/MC/MCSectionXCOFF.h"
78#include "llvm/MC/MCSymbolXCOFF.h"
79#include "llvm/Support/AtomicOrdering.h"
80#include "llvm/Support/BranchProbability.h"
81#include "llvm/Support/Casting.h"
82#include "llvm/Support/CodeGen.h"
83#include "llvm/Support/CommandLine.h"
84#include "llvm/Support/Compiler.h"
85#include "llvm/Support/Debug.h"
86#include "llvm/Support/ErrorHandling.h"
87#include "llvm/Support/Format.h"
88#include "llvm/Support/KnownBits.h"
89#include "llvm/Support/MathExtras.h"
90#include "llvm/Support/raw_ostream.h"
91#include "llvm/Target/TargetMachine.h"
92#include "llvm/Target/TargetOptions.h"
93#include <algorithm>
94#include <cassert>
95#include <cstdint>
96#include <iterator>
97#include <list>
98#include <optional>
99#include <utility>
100#include <vector>

102using namespace llvm;

104#define DEBUG_TYPE"ppc-lowering" "ppc-lowering"

106static cl::opt<bool> DisablePPCPreinc("disable-ppc-preinc",
107cl::desc("disable preincrement load/store generation on PPC"), cl::Hidden);

109static cl::opt<bool> DisableILPPref("disable-ppc-ilp-pref",
110cl::desc("disable setting the node scheduling preference to ILP on PPC"), cl::Hidden);

112static cl::opt<bool> DisablePPCUnaligned("disable-ppc-unaligned",
113cl::desc("disable unaligned load/store generation on PPC"), cl::Hidden);

115static cl::opt<bool> DisableSCO("disable-ppc-sco",
116cl::desc("disable sibling call optimization on ppc"), cl::Hidden);

118static cl::opt<bool> DisableInnermostLoopAlign32("disable-ppc-innermost-loop-align32",
119cl::desc("don't always align innermost loop to 32 bytes on ppc"), cl::Hidden);

121static cl::opt<bool> UseAbsoluteJumpTables("ppc-use-absolute-jumptables",
122cl::desc("use absolute jump tables on ppc"), cl::Hidden);

124static cl::opt<bool> EnableQuadwordAtomics(
  "ppc-quadword-atomics",
  cl::desc("enable quadword lock-free atomic operations"), cl::init(false),
  cl::Hidden);

129static cl::opt<bool>
  DisablePerfectShuffle("ppc-disable-perfect-shuffle",
                        cl::desc("disable vector permute decomposition"),
                        cl::init(true), cl::Hidden);

134cl::opt<bool> DisableAutoPairedVecSt(
  "disable-auto-paired-vec-st",
  cl::desc("disable automatically generated 32byte paired vector stores"),
  cl::init(true), cl::Hidden);

139STATISTIC(NumTailCalls, "Number of tail calls")static llvm::Statistic NumTailCalls = {"ppc-lowering", "NumTailCalls"
, "Number of tail calls"};
140STATISTIC(NumSiblingCalls, "Number of sibling calls")static llvm::Statistic NumSiblingCalls = {"ppc-lowering", "NumSiblingCalls"
, "Number of sibling calls"};
141STATISTIC(ShufflesHandledWithVPERM,static llvm::Statistic ShufflesHandledWithVPERM = {"ppc-lowering"
, "ShufflesHandledWithVPERM", "Number of shuffles lowered to a VPERM or XXPERM"
}
        "Number of shuffles lowered to a VPERM or XXPERM")static llvm::Statistic ShufflesHandledWithVPERM = {"ppc-lowering"
, "ShufflesHandledWithVPERM", "Number of shuffles lowered to a VPERM or XXPERM"
};
143STATISTIC(NumDynamicAllocaProbed, "Number of dynamic stack allocation probed")static llvm::Statistic NumDynamicAllocaProbed = {"ppc-lowering"
, "NumDynamicAllocaProbed", "Number of dynamic stack allocation probed"
};

145static bool isNByteElemShuffleMask(ShuffleVectorSDNode *, unsigned, int);

147static SDValue widenVec(SelectionDAG &DAG, SDValue Vec, const SDLoc &dl);

149static const char AIXSSPCanaryWordName[] = "__ssp_canary_word";

151// FIXME: Remove this once the bug has been fixed!
152extern cl::opt<bool> ANDIGlueBug;

154PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
                                   const PPCSubtarget &STI)
  : TargetLowering(TM), Subtarget(STI) {
// Initialize map that relates the PPC addressing modes to the computed flags
// of a load/store instruction. The map is used to determine the optimal
// addressing mode when selecting load and stores.
initializeAddrModeMap();
// On PPC32/64, arguments smaller than 4/8 bytes are extended, so all
// arguments are at least 4/8 bytes aligned.
bool isPPC64 = Subtarget.isPPC64();
setMinStackArgumentAlignment(isPPC64 ? Align(8) : Align(4));

// Set up the register classes.
addRegisterClass(MVT::i32, &PPC::GPRCRegClass);
if (!useSoftFloat()) {
  if (hasSPE()) {
    addRegisterClass(MVT::f32, &PPC::GPRCRegClass);
    // EFPU2 APU only supports f32
    if (!Subtarget.hasEFPU2())
      addRegisterClass(MVT::f64, &PPC::SPERCRegClass);
  } else {
    addRegisterClass(MVT::f32, &PPC::F4RCRegClass);
    addRegisterClass(MVT::f64, &PPC::F8RCRegClass);
  }
}

// Match BITREVERSE to customized fast code sequence in the td file.
setOperationAction(ISD::BITREVERSE, MVT::i32, Legal);
setOperationAction(ISD::BITREVERSE, MVT::i64, Legal);

// Sub-word ATOMIC_CMP_SWAP need to ensure that the input is zero-extended.
setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Custom);

// Custom lower inline assembly to check for special registers.
setOperationAction(ISD::INLINEASM, MVT::Other, Custom);
setOperationAction(ISD::INLINEASM_BR, MVT::Other, Custom);

// PowerPC has an i16 but no i8 (or i1) SEXTLOAD.
for (MVT VT : MVT::integer_valuetypes()) {
  setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote);
  setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i8, Expand);
}

if (Subtarget.isISA3_0()) {
  setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f16, Legal);
  setLoadExtAction(ISD::EXTLOAD, MVT::f32, MVT::f16, Legal);
  setTruncStoreAction(MVT::f64, MVT::f16, Legal);
  setTruncStoreAction(MVT::f32, MVT::f16, Legal);
} else {
  // No extending loads from f16 or HW conversions back and forth.
  setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f16, Expand);
  setOperationAction(ISD::FP16_TO_FP, MVT::f64, Expand);
  setOperationAction(ISD::FP_TO_FP16, MVT::f64, Expand);
  setLoadExtAction(ISD::EXTLOAD, MVT::f32, MVT::f16, Expand);
  setOperationAction(ISD::FP16_TO_FP, MVT::f32, Expand);
  setOperationAction(ISD::FP_TO_FP16, MVT::f32, Expand);
  setTruncStoreAction(MVT::f64, MVT::f16, Expand);
  setTruncStoreAction(MVT::f32, MVT::f16, Expand);
}

setTruncStoreAction(MVT::f64, MVT::f32, Expand);

// PowerPC has pre-inc load and store's.
setIndexedLoadAction(ISD::PRE_INC, MVT::i1, Legal);
setIndexedLoadAction(ISD::PRE_INC, MVT::i8, Legal);
setIndexedLoadAction(ISD::PRE_INC, MVT::i16, Legal);
setIndexedLoadAction(ISD::PRE_INC, MVT::i32, Legal);
setIndexedLoadAction(ISD::PRE_INC, MVT::i64, Legal);
setIndexedStoreAction(ISD::PRE_INC, MVT::i1, Legal);
setIndexedStoreAction(ISD::PRE_INC, MVT::i8, Legal);
setIndexedStoreAction(ISD::PRE_INC, MVT::i16, Legal);
setIndexedStoreAction(ISD::PRE_INC, MVT::i32, Legal);
setIndexedStoreAction(ISD::PRE_INC, MVT::i64, Legal);
if (!Subtarget.hasSPE()) {
  setIndexedLoadAction(ISD::PRE_INC, MVT::f32, Legal);
  setIndexedLoadAction(ISD::PRE_INC, MVT::f64, Legal);
  setIndexedStoreAction(ISD::PRE_INC, MVT::f32, Legal);
  setIndexedStoreAction(ISD::PRE_INC, MVT::f64, Legal);
}

// PowerPC uses ADDC/ADDE/SUBC/SUBE to propagate carry.
const MVT ScalarIntVTs[] = { MVT::i32, MVT::i64 };
for (MVT VT : ScalarIntVTs) {
  setOperationAction(ISD::ADDC, VT, Legal);
  setOperationAction(ISD::ADDE, VT, Legal);
  setOperationAction(ISD::SUBC, VT, Legal);
  setOperationAction(ISD::SUBE, VT, Legal);
}

if (Subtarget.useCRBits()) {
  setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);

  if (isPPC64 || Subtarget.hasFPCVT()) {
    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i1, Promote);
    AddPromotedToType(ISD::STRICT_SINT_TO_FP, MVT::i1,
                      isPPC64 ? MVT::i64 : MVT::i32);
    setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i1, Promote);
    AddPromotedToType(ISD::STRICT_UINT_TO_FP, MVT::i1,
                      isPPC64 ? MVT::i64 : MVT::i32);

    setOperationAction(ISD::SINT_TO_FP, MVT::i1, Promote);
    AddPromotedToType (ISD::SINT_TO_FP, MVT::i1,
                       isPPC64 ? MVT::i64 : MVT::i32);
    setOperationAction(ISD::UINT_TO_FP, MVT::i1, Promote);
    AddPromotedToType(ISD::UINT_TO_FP, MVT::i1,
                      isPPC64 ? MVT::i64 : MVT::i32);

    setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i1, Promote);
    AddPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::i1,
                      isPPC64 ? MVT::i64 : MVT::i32);
    setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i1, Promote);
    AddPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::i1,
                      isPPC64 ? MVT::i64 : MVT::i32);

    setOperationAction(ISD::FP_TO_SINT, MVT::i1, Promote);
    AddPromotedToType(ISD::FP_TO_SINT, MVT::i1,
                      isPPC64 ? MVT::i64 : MVT::i32);
    setOperationAction(ISD::FP_TO_UINT, MVT::i1, Promote);
    AddPromotedToType(ISD::FP_TO_UINT, MVT::i1,
                      isPPC64 ? MVT::i64 : MVT::i32);
  } else {
    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i1, Custom);
    setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i1, Custom);
    setOperationAction(ISD::SINT_TO_FP, MVT::i1, Custom);
    setOperationAction(ISD::UINT_TO_FP, MVT::i1, Custom);
  }

  // PowerPC does not support direct load/store of condition registers.
  setOperationAction(ISD::LOAD, MVT::i1, Custom);
  setOperationAction(ISD::STORE, MVT::i1, Custom);

  // FIXME: Remove this once the ANDI glue bug is fixed:
  if (ANDIGlueBug)
    setOperationAction(ISD::TRUNCATE, MVT::i1, Custom);

  for (MVT VT : MVT::integer_valuetypes()) {
    setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote);
    setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i1, Promote);
    setTruncStoreAction(VT, MVT::i1, Expand);
  }

  addRegisterClass(MVT::i1, &PPC::CRBITRCRegClass);
}

// Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
// PPC (the libcall is not available).
setOperationAction(ISD::FP_TO_SINT, MVT::ppcf128, Custom);
setOperationAction(ISD::FP_TO_UINT, MVT::ppcf128, Custom);
setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::ppcf128, Custom);
setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::ppcf128, Custom);

// We do not currently implement these libm ops for PowerPC.
setOperationAction(ISD::FFLOOR, MVT::ppcf128, Expand);
setOperationAction(ISD::FCEIL,  MVT::ppcf128, Expand);
setOperationAction(ISD::FTRUNC, MVT::ppcf128, Expand);
setOperationAction(ISD::FRINT,  MVT::ppcf128, Expand);
setOperationAction(ISD::FNEARBYINT, MVT::ppcf128, Expand);
setOperationAction(ISD::FREM, MVT::ppcf128, Expand);

// PowerPC has no SREM/UREM instructions unless we are on P9
// On P9 we may use a hardware instruction to compute the remainder.
// When the result of both the remainder and the division is required it is
// more efficient to compute the remainder from the result of the division
// rather than use the remainder instruction. The instructions are legalized
// directly because the DivRemPairsPass performs the transformation at the IR
// level.
if (Subtarget.isISA3_0()) {
  setOperationAction(ISD::SREM, MVT::i32, Legal);
  setOperationAction(ISD::UREM, MVT::i32, Legal);
  setOperationAction(ISD::SREM, MVT::i64, Legal);
  setOperationAction(ISD::UREM, MVT::i64, Legal);
} else {
  setOperationAction(ISD::SREM, MVT::i32, Expand);
  setOperationAction(ISD::UREM, MVT::i32, Expand);
  setOperationAction(ISD::SREM, MVT::i64, Expand);
  setOperationAction(ISD::UREM, MVT::i64, Expand);
}

// Don't use SMUL_LOHI/UMUL_LOHI or SDIVREM/UDIVREM to lower SREM/UREM.
setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
setOperationAction(ISD::SDIVREM, MVT::i64, Expand);

// Handle constrained floating-point operations of scalar.
// TODO: Handle SPE specific operation.
setOperationAction(ISD::STRICT_FADD, MVT::f32, Legal);
setOperationAction(ISD::STRICT_FSUB, MVT::f32, Legal);
setOperationAction(ISD::STRICT_FMUL, MVT::f32, Legal);
setOperationAction(ISD::STRICT_FDIV, MVT::f32, Legal);
setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Legal);

setOperationAction(ISD::STRICT_FADD, MVT::f64, Legal);
setOperationAction(ISD::STRICT_FSUB, MVT::f64, Legal);
setOperationAction(ISD::STRICT_FMUL, MVT::f64, Legal);
setOperationAction(ISD::STRICT_FDIV, MVT::f64, Legal);

if (!Subtarget.hasSPE()) {
  setOperationAction(ISD::STRICT_FMA, MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FMA, MVT::f64, Legal);
}

if (Subtarget.hasVSX()) {
  setOperationAction(ISD::STRICT_FRINT, MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FRINT, MVT::f64, Legal);
}

if (Subtarget.hasFSQRT()) {
  setOperationAction(ISD::STRICT_FSQRT, MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FSQRT, MVT::f64, Legal);
}

if (Subtarget.hasFPRND()) {
  setOperationAction(ISD::STRICT_FFLOOR, MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FCEIL,  MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FTRUNC, MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FROUND, MVT::f32, Legal);

  setOperationAction(ISD::STRICT_FFLOOR, MVT::f64, Legal);
  setOperationAction(ISD::STRICT_FCEIL,  MVT::f64, Legal);
  setOperationAction(ISD::STRICT_FTRUNC, MVT::f64, Legal);
  setOperationAction(ISD::STRICT_FROUND, MVT::f64, Legal);
}

// We don't support sin/cos/sqrt/fmod/pow
setOperationAction(ISD::FSIN , MVT::f64, Expand);
setOperationAction(ISD::FCOS , MVT::f64, Expand);
setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
setOperationAction(ISD::FREM , MVT::f64, Expand);
setOperationAction(ISD::FPOW , MVT::f64, Expand);
setOperationAction(ISD::FSIN , MVT::f32, Expand);
setOperationAction(ISD::FCOS , MVT::f32, Expand);
setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
setOperationAction(ISD::FREM , MVT::f32, Expand);
setOperationAction(ISD::FPOW , MVT::f32, Expand);

// MASS transformation for LLVM intrinsics with replicating fast-math flag
// to be consistent to PPCGenScalarMASSEntries pass
if (TM.getOptLevel() == CodeGenOpt::Aggressive) {
  setOperationAction(ISD::FSIN , MVT::f64, Custom);
  setOperationAction(ISD::FCOS , MVT::f64, Custom);
  setOperationAction(ISD::FPOW , MVT::f64, Custom);
  setOperationAction(ISD::FLOG, MVT::f64, Custom);
  setOperationAction(ISD::FLOG10, MVT::f64, Custom);
  setOperationAction(ISD::FEXP, MVT::f64, Custom);
  setOperationAction(ISD::FSIN , MVT::f32, Custom);
  setOperationAction(ISD::FCOS , MVT::f32, Custom);
  setOperationAction(ISD::FPOW , MVT::f32, Custom);
  setOperationAction(ISD::FLOG, MVT::f32, Custom);
  setOperationAction(ISD::FLOG10, MVT::f32, Custom);
  setOperationAction(ISD::FEXP, MVT::f32, Custom);
}

if (Subtarget.hasSPE()) {
  setOperationAction(ISD::FMA  , MVT::f64, Expand);
  setOperationAction(ISD::FMA  , MVT::f32, Expand);
} else {
  setOperationAction(ISD::FMA  , MVT::f64, Legal);
  setOperationAction(ISD::FMA  , MVT::f32, Legal);
}

if (Subtarget.hasSPE())
  setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f32, Expand);

setOperationAction(ISD::GET_ROUNDING, MVT::i32, Custom);

// If we're enabling GP optimizations, use hardware square root
if (!Subtarget.hasFSQRT() &&
    !(TM.Options.UnsafeFPMath && Subtarget.hasFRSQRTE() &&
      Subtarget.hasFRE()))
  setOperationAction(ISD::FSQRT, MVT::f64, Expand);

if (!Subtarget.hasFSQRT() &&
    !(TM.Options.UnsafeFPMath && Subtarget.hasFRSQRTES() &&
      Subtarget.hasFRES()))
  setOperationAction(ISD::FSQRT, MVT::f32, Expand);

if (Subtarget.hasFCPSGN()) {
  setOperationAction(ISD::FCOPYSIGN, MVT::f64, Legal);
  setOperationAction(ISD::FCOPYSIGN, MVT::f32, Legal);
} else {
  setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
  setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
}

if (Subtarget.hasFPRND()) {
  setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
  setOperationAction(ISD::FCEIL,  MVT::f64, Legal);
  setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
  setOperationAction(ISD::FROUND, MVT::f64, Legal);

  setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
  setOperationAction(ISD::FCEIL,  MVT::f32, Legal);
  setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
  setOperationAction(ISD::FROUND, MVT::f32, Legal);
}

// Prior to P10, PowerPC does not have BSWAP, but we can use vector BSWAP
// instruction xxbrd to speed up scalar BSWAP64.
if (Subtarget.isISA3_1()) {
  setOperationAction(ISD::BSWAP, MVT::i32, Legal);
  setOperationAction(ISD::BSWAP, MVT::i64, Legal);
} else {
  setOperationAction(ISD::BSWAP, MVT::i32, Expand);
  setOperationAction(
      ISD::BSWAP, MVT::i64,
      (Subtarget.hasP9Vector() && Subtarget.isPPC64()) ? Custom : Expand);
}

// CTPOP or CTTZ were introduced in P8/P9 respectively
if (Subtarget.isISA3_0()) {
  setOperationAction(ISD::CTTZ , MVT::i32  , Legal);
  setOperationAction(ISD::CTTZ , MVT::i64  , Legal);
} else {
  setOperationAction(ISD::CTTZ , MVT::i32  , Expand);
  setOperationAction(ISD::CTTZ , MVT::i64  , Expand);
}

if (Subtarget.hasPOPCNTD() == PPCSubtarget::POPCNTD_Fast) {
  setOperationAction(ISD::CTPOP, MVT::i32  , Legal);
  setOperationAction(ISD::CTPOP, MVT::i64  , Legal);
} else {
  setOperationAction(ISD::CTPOP, MVT::i32  , Expand);
  setOperationAction(ISD::CTPOP, MVT::i64  , Expand);
}

// PowerPC does not have ROTR
setOperationAction(ISD::ROTR, MVT::i32   , Expand);
setOperationAction(ISD::ROTR, MVT::i64   , Expand);

if (!Subtarget.useCRBits()) {
  // PowerPC does not have Select
  setOperationAction(ISD::SELECT, MVT::i32, Expand);
  setOperationAction(ISD::SELECT, MVT::i64, Expand);
  setOperationAction(ISD::SELECT, MVT::f32, Expand);
  setOperationAction(ISD::SELECT, MVT::f64, Expand);
}

// PowerPC wants to turn select_cc of FP into fsel when possible.
setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);

// PowerPC wants to optimize integer setcc a bit
if (!Subtarget.useCRBits())
  setOperationAction(ISD::SETCC, MVT::i32, Custom);

if (Subtarget.hasFPU()) {
  setOperationAction(ISD::STRICT_FSETCC, MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FSETCC, MVT::f64, Legal);
  setOperationAction(ISD::STRICT_FSETCC, MVT::f128, Legal);

  setOperationAction(ISD::STRICT_FSETCCS, MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FSETCCS, MVT::f64, Legal);
  setOperationAction(ISD::STRICT_FSETCCS, MVT::f128, Legal);
}

// PowerPC does not have BRCOND which requires SetCC
if (!Subtarget.useCRBits())
  setOperationAction(ISD::BRCOND, MVT::Other, Expand);

setOperationAction(ISD::BR_JT,  MVT::Other, Expand);

if (Subtarget.hasSPE()) {
  // SPE has built-in conversions
  setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Legal);
  setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Legal);
  setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i32, Legal);
  setOperationAction(ISD::FP_TO_SINT, MVT::i32, Legal);
  setOperationAction(ISD::SINT_TO_FP, MVT::i32, Legal);
  setOperationAction(ISD::UINT_TO_FP, MVT::i32, Legal);

  // SPE supports signaling compare of f32/f64.
  setOperationAction(ISD::STRICT_FSETCCS, MVT::f32, Legal);
  setOperationAction(ISD::STRICT_FSETCCS, MVT::f64, Legal);
} else {
  // PowerPC turns FP_TO_SINT into FCTIWZ and some load/stores.
  setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Custom);
  setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);

  // PowerPC does not have [U|S]INT_TO_FP
  setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Expand);
  setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i32, Expand);
  setOperationAction(ISD::SINT_TO_FP, MVT::i32, Expand);
  setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
}

if (Subtarget.hasDirectMove() && isPPC64) {
  setOperationAction(ISD::BITCAST, MVT::f32, Legal);
  setOperationAction(ISD::BITCAST, MVT::i32, Legal);
  setOperationAction(ISD::BITCAST, MVT::i64, Legal);
  setOperationAction(ISD::BITCAST, MVT::f64, Legal);
  if (TM.Options.UnsafeFPMath) {
    setOperationAction(ISD::LRINT, MVT::f64, Legal);
    setOperationAction(ISD::LRINT, MVT::f32, Legal);
    setOperationAction(ISD::LLRINT, MVT::f64, Legal);
    setOperationAction(ISD::LLRINT, MVT::f32, Legal);
    setOperationAction(ISD::LROUND, MVT::f64, Legal);
    setOperationAction(ISD::LROUND, MVT::f32, Legal);
    setOperationAction(ISD::LLROUND, MVT::f64, Legal);
    setOperationAction(ISD::LLROUND, MVT::f32, Legal);
  }
} else {
  setOperationAction(ISD::BITCAST, MVT::f32, Expand);
  setOperationAction(ISD::BITCAST, MVT::i32, Expand);
  setOperationAction(ISD::BITCAST, MVT::i64, Expand);
  setOperationAction(ISD::BITCAST, MVT::f64, Expand);
}

// We cannot sextinreg(i1).  Expand to shifts.
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);

// NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intended to support
// SjLj exception handling but a light-weight setjmp/longjmp replacement to
// support continuation, user-level threading, and etc.. As a result, no
// other SjLj exception interfaces are implemented and please don't build
// your own exception handling based on them.
// LLVM/Clang supports zero-cost DWARF exception handling.
setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);

// We want to legalize GlobalAddress and ConstantPool nodes into the
// appropriate instructions to materialize the address.
setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
setOperationAction(ISD::BlockAddress,  MVT::i32, Custom);
setOperationAction(ISD::ConstantPool,  MVT::i32, Custom);
setOperationAction(ISD::JumpTable,     MVT::i32, Custom);
setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
setOperationAction(ISD::BlockAddress,  MVT::i64, Custom);
setOperationAction(ISD::ConstantPool,  MVT::i64, Custom);
setOperationAction(ISD::JumpTable,     MVT::i64, Custom);

// TRAP is legal.
setOperationAction(ISD::TRAP, MVT::Other, Legal);

// TRAMPOLINE is custom lowered.
setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);

// VASTART needs to be custom lowered to use the VarArgsFrameIndex
setOperationAction(ISD::VASTART           , MVT::Other, Custom);

if (Subtarget.is64BitELFABI()) {
  // VAARG always uses double-word chunks, so promote anything smaller.
  setOperationAction(ISD::VAARG, MVT::i1, Promote);
  AddPromotedToType(ISD::VAARG, MVT::i1, MVT::i64);
  setOperationAction(ISD::VAARG, MVT::i8, Promote);
  AddPromotedToType(ISD::VAARG, MVT::i8, MVT::i64);
  setOperationAction(ISD::VAARG, MVT::i16, Promote);
  AddPromotedToType(ISD::VAARG, MVT::i16, MVT::i64);
  setOperationAction(ISD::VAARG, MVT::i32, Promote);
  AddPromotedToType(ISD::VAARG, MVT::i32, MVT::i64);
  setOperationAction(ISD::VAARG, MVT::Other, Expand);
} else if (Subtarget.is32BitELFABI()) {
  // VAARG is custom lowered with the 32-bit SVR4 ABI.
  setOperationAction(ISD::VAARG, MVT::Other, Custom);
  setOperationAction(ISD::VAARG, MVT::i64, Custom);
} else
  setOperationAction(ISD::VAARG, MVT::Other, Expand);

// VACOPY is custom lowered with the 32-bit SVR4 ABI.
if (Subtarget.is32BitELFABI())
  setOperationAction(ISD::VACOPY            , MVT::Other, Custom);
else
  setOperationAction(ISD::VACOPY            , MVT::Other, Expand);

// Use the default implementation.
setOperationAction(ISD::VAEND             , MVT::Other, Expand);
setOperationAction(ISD::STACKSAVE         , MVT::Other, Expand);
setOperationAction(ISD::STACKRESTORE      , MVT::Other, Custom);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32  , Custom);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64  , Custom);
setOperationAction(ISD::GET_DYNAMIC_AREA_OFFSET, MVT::i32, Custom);
setOperationAction(ISD::GET_DYNAMIC_AREA_OFFSET, MVT::i64, Custom);
setOperationAction(ISD::EH_DWARF_CFA, MVT::i32, Custom);
setOperationAction(ISD::EH_DWARF_CFA, MVT::i64, Custom);

// We want to custom lower some of our intrinsics.
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::f64, Custom);
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::ppcf128, Custom);
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::v4f32, Custom);
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::v2f64, Custom);

// To handle counter-based loop conditions.
setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i1, Custom);

setOperationAction(ISD::INTRINSIC_VOID, MVT::i8, Custom);
setOperationAction(ISD::INTRINSIC_VOID, MVT::i16, Custom);
setOperationAction(ISD::INTRINSIC_VOID, MVT::i32, Custom);
setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom);

// Comparisons that require checking two conditions.
if (Subtarget.hasSPE()) {
  setCondCodeAction(ISD::SETO, MVT::f32, Expand);
  setCondCodeAction(ISD::SETO, MVT::f64, Expand);
  setCondCodeAction(ISD::SETUO, MVT::f32, Expand);
  setCondCodeAction(ISD::SETUO, MVT::f64, Expand);
}
setCondCodeAction(ISD::SETULT, MVT::f32, Expand);
setCondCodeAction(ISD::SETULT, MVT::f64, Expand);
setCondCodeAction(ISD::SETUGT, MVT::f32, Expand);
setCondCodeAction(ISD::SETUGT, MVT::f64, Expand);
setCondCodeAction(ISD::SETUEQ, MVT::f32, Expand);
setCondCodeAction(ISD::SETUEQ, MVT::f64, Expand);
setCondCodeAction(ISD::SETOGE, MVT::f32, Expand);
setCondCodeAction(ISD::SETOGE, MVT::f64, Expand);
setCondCodeAction(ISD::SETOLE, MVT::f32, Expand);
setCondCodeAction(ISD::SETOLE, MVT::f64, Expand);
setCondCodeAction(ISD::SETONE, MVT::f32, Expand);
setCondCodeAction(ISD::SETONE, MVT::f64, Expand);

setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f32, Legal);
setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f64, Legal);

if (Subtarget.has64BitSupport()) {
  // They also have instructions for converting between i64 and fp.
  setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i64, Custom);
  setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i64, Expand);
  setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i64, Custom);
  setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i64, Expand);
  setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
  setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
  setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
  setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
  // This is just the low 32 bits of a (signed) fp->i64 conversion.
  // We cannot do this with Promote because i64 is not a legal type.
  setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Custom);
  setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);

  if (Subtarget.hasLFIWAX() || Subtarget.isPPC64()) {
    setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Custom);
  }
} else {
  // PowerPC does not have FP_TO_UINT on 32-bit implementations.
  if (Subtarget.hasSPE()) {
    setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Legal);
    setOperationAction(ISD::FP_TO_UINT, MVT::i32, Legal);
  } else {
    setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Expand);
    setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
  }
}

// With the instructions enabled under FPCVT, we can do everything.
if (Subtarget.hasFPCVT()) {
  if (Subtarget.has64BitSupport()) {
    setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i64, Custom);
    setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i64, Custom);
    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i64, Custom);
    setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i64, Custom);
    setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
    setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom);
    setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
    setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
  }

  setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Custom);
  setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Custom);
  setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Custom);
  setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i32, Custom);
  setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
  setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
  setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
  setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
}

if (Subtarget.use64BitRegs()) {
  // 64-bit PowerPC implementations can support i64 types directly
  addRegisterClass(MVT::i64, &PPC::G8RCRegClass);
  // BUILD_PAIR can't be handled natively, and should be expanded to shl/or
  setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
  // 64-bit PowerPC wants to expand i128 shifts itself.
  setOperationAction(ISD::SHL_PARTS, MVT::i64, Custom);
  setOperationAction(ISD::SRA_PARTS, MVT::i64, Custom);
  setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom);
} else {
  // 32-bit PowerPC wants to expand i64 shifts itself.
  setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
  setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
  setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
}

// PowerPC has better expansions for funnel shifts than the generic
// TargetLowering::expandFunnelShift.
if (Subtarget.has64BitSupport()) {
  setOperationAction(ISD::FSHL, MVT::i64, Custom);
  setOperationAction(ISD::FSHR, MVT::i64, Custom);
}
setOperationAction(ISD::FSHL, MVT::i32, Custom);
setOperationAction(ISD::FSHR, MVT::i32, Custom);

if (Subtarget.hasVSX()) {
  setOperationAction(ISD::FMAXNUM_IEEE, MVT::f64, Legal);
  setOperationAction(ISD::FMAXNUM_IEEE, MVT::f32, Legal);
  setOperationAction(ISD::FMINNUM_IEEE, MVT::f64, Legal);
  setOperationAction(ISD::FMINNUM_IEEE, MVT::f32, Legal);
}

if (Subtarget.hasAltivec()) {
  for (MVT VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32 }) {
    setOperationAction(ISD::SADDSAT, VT, Legal);
    setOperationAction(ISD::SSUBSAT, VT, Legal);
    setOperationAction(ISD::UADDSAT, VT, Legal);
    setOperationAction(ISD::USUBSAT, VT, Legal);
  }
  // First set operation action for all vector types to expand. Then we
  // will selectively turn on ones that can be effectively codegen'd.
  for (MVT VT : MVT::fixedlen_vector_valuetypes()) {
    // add/sub are legal for all supported vector VT's.
    setOperationAction(ISD::ADD, VT, Legal);
    setOperationAction(ISD::SUB, VT, Legal);

    // For v2i64, these are only valid with P8Vector. This is corrected after
    // the loop.
    if (VT.getSizeInBits() <= 128 && VT.getScalarSizeInBits() <= 64) {
      setOperationAction(ISD::SMAX, VT, Legal);
      setOperationAction(ISD::SMIN, VT, Legal);
      setOperationAction(ISD::UMAX, VT, Legal);
      setOperationAction(ISD::UMIN, VT, Legal);
    }
    else {
      setOperationAction(ISD::SMAX, VT, Expand);
      setOperationAction(ISD::SMIN, VT, Expand);
      setOperationAction(ISD::UMAX, VT, Expand);
      setOperationAction(ISD::UMIN, VT, Expand);
    }

    if (Subtarget.hasVSX()) {
      setOperationAction(ISD::FMAXNUM, VT, Legal);
      setOperationAction(ISD::FMINNUM, VT, Legal);
    }

    // Vector instructions introduced in P8
    if (Subtarget.hasP8Altivec() && (VT.SimpleTy != MVT::v1i128)) {
      setOperationAction(ISD::CTPOP, VT, Legal);
      setOperationAction(ISD::CTLZ, VT, Legal);
    }
    else {
      setOperationAction(ISD::CTPOP, VT, Expand);
      setOperationAction(ISD::CTLZ, VT, Expand);
    }

    // Vector instructions introduced in P9
    if (Subtarget.hasP9Altivec() && (VT.SimpleTy != MVT::v1i128))
      setOperationAction(ISD::CTTZ, VT, Legal);
    else
      setOperationAction(ISD::CTTZ, VT, Expand);

    // We promote all shuffles to v16i8.
    setOperationAction(ISD::VECTOR_SHUFFLE, VT, Promote);
    AddPromotedToType (ISD::VECTOR_SHUFFLE, VT, MVT::v16i8);

    // We promote all non-typed operations to v4i32.
    setOperationAction(ISD::AND   , VT, Promote);
    AddPromotedToType (ISD::AND   , VT, MVT::v4i32);
    setOperationAction(ISD::OR    , VT, Promote);
    AddPromotedToType (ISD::OR    , VT, MVT::v4i32);
    setOperationAction(ISD::XOR   , VT, Promote);
    AddPromotedToType (ISD::XOR   , VT, MVT::v4i32);
    setOperationAction(ISD::LOAD  , VT, Promote);
    AddPromotedToType (ISD::LOAD  , VT, MVT::v4i32);
    setOperationAction(ISD::SELECT, VT, Promote);
    AddPromotedToType (ISD::SELECT, VT, MVT::v4i32);
    setOperationAction(ISD::VSELECT, VT, Legal);
    setOperationAction(ISD::SELECT_CC, VT, Promote);
    AddPromotedToType (ISD::SELECT_CC, VT, MVT::v4i32);
    setOperationAction(ISD::STORE, VT, Promote);
    AddPromotedToType (ISD::STORE, VT, MVT::v4i32);

    // No other operations are legal.
    setOperationAction(ISD::MUL , VT, Expand);
    setOperationAction(ISD::SDIV, VT, Expand);
    setOperationAction(ISD::SREM, VT, Expand);
    setOperationAction(ISD::UDIV, VT, Expand);
    setOperationAction(ISD::UREM, VT, Expand);
    setOperationAction(ISD::FDIV, VT, Expand);
    setOperationAction(ISD::FREM, VT, Expand);
    setOperationAction(ISD::FNEG, VT, Expand);
    setOperationAction(ISD::FSQRT, VT, Expand);
    setOperationAction(ISD::FLOG, VT, Expand);
    setOperationAction(ISD::FLOG10, VT, Expand);
    setOperationAction(ISD::FLOG2, VT, Expand);
    setOperationAction(ISD::FEXP, VT, Expand);
    setOperationAction(ISD::FEXP2, VT, Expand);
    setOperationAction(ISD::FSIN, VT, Expand);
    setOperationAction(ISD::FCOS, VT, Expand);
    setOperationAction(ISD::FABS, VT, Expand);
    setOperationAction(ISD::FFLOOR, VT, Expand);
    setOperationAction(ISD::FCEIL,  VT, Expand);
    setOperationAction(ISD::FTRUNC, VT, Expand);
    setOperationAction(ISD::FRINT,  VT, Expand);
    setOperationAction(ISD::FNEARBYINT, VT, Expand);
    setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Expand);
    setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand);
    setOperationAction(ISD::BUILD_VECTOR, VT, Expand);
    setOperationAction(ISD::MULHU, VT, Expand);
    setOperationAction(ISD::MULHS, VT, Expand);
    setOperationAction(ISD::UMUL_LOHI, VT, Expand);
    setOperationAction(ISD::SMUL_LOHI, VT, Expand);
    setOperationAction(ISD::UDIVREM, VT, Expand);
    setOperationAction(ISD::SDIVREM, VT, Expand);
    setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Expand);
    setOperationAction(ISD::FPOW, VT, Expand);
    setOperationAction(ISD::BSWAP, VT, Expand);
    setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
    setOperationAction(ISD::ROTL, VT, Expand);
    setOperationAction(ISD::ROTR, VT, Expand);

    for (MVT InnerVT : MVT::fixedlen_vector_valuetypes()) {
      setTruncStoreAction(VT, InnerVT, Expand);
      setLoadExtAction(ISD::SEXTLOAD, VT, InnerVT, Expand);
      setLoadExtAction(ISD::ZEXTLOAD, VT, InnerVT, Expand);
      setLoadExtAction(ISD::EXTLOAD, VT, InnerVT, Expand);
    }
  }
  setOperationAction(ISD::SELECT_CC, MVT::v4i32, Expand);
  if (!Subtarget.hasP8Vector()) {
    setOperationAction(ISD::SMAX, MVT::v2i64, Expand);
    setOperationAction(ISD::SMIN, MVT::v2i64, Expand);
    setOperationAction(ISD::UMAX, MVT::v2i64, Expand);
    setOperationAction(ISD::UMIN, MVT::v2i64, Expand);
  }

  // We can custom expand all VECTOR_SHUFFLEs to VPERM, others we can handle
  // with merges, splats, etc.
  setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v16i8, Custom);

  // Vector truncates to sub-word integer that fit in an Altivec/VSX register
  // are cheap, so handle them before they get expanded to scalar.
  setOperationAction(ISD::TRUNCATE, MVT::v8i8, Custom);
  setOperationAction(ISD::TRUNCATE, MVT::v4i8, Custom);
  setOperationAction(ISD::TRUNCATE, MVT::v2i8, Custom);
  setOperationAction(ISD::TRUNCATE, MVT::v4i16, Custom);
  setOperationAction(ISD::TRUNCATE, MVT::v2i16, Custom);

  setOperationAction(ISD::AND   , MVT::v4i32, Legal);
  setOperationAction(ISD::OR    , MVT::v4i32, Legal);
  setOperationAction(ISD::XOR   , MVT::v4i32, Legal);
  setOperationAction(ISD::LOAD  , MVT::v4i32, Legal);
  setOperationAction(ISD::SELECT, MVT::v4i32,
                     Subtarget.useCRBits() ? Legal : Expand);
  setOperationAction(ISD::STORE , MVT::v4i32, Legal);
  setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v4i32, Legal);
  setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v4i32, Legal);
  setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i32, Legal);
  setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i32, Legal);
  setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
  setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Legal);
  setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
  setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Legal);
  setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
  setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
  setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
  setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);

  // Custom lowering ROTL v1i128 to VECTOR_SHUFFLE v16i8.
  setOperationAction(ISD::ROTL, MVT::v1i128, Custom);
  // With hasAltivec set, we can lower ISD::ROTL to vrl(b|h|w).
  if (Subtarget.hasAltivec())
    for (auto VT : {MVT::v4i32, MVT::v8i16, MVT::v16i8})
      setOperationAction(ISD::ROTL, VT, Legal);
  // With hasP8Altivec set, we can lower ISD::ROTL to vrld.
  if (Subtarget.hasP8Altivec())
    setOperationAction(ISD::ROTL, MVT::v2i64, Legal);

  addRegisterClass(MVT::v4f32, &PPC::VRRCRegClass);
  addRegisterClass(MVT::v4i32, &PPC::VRRCRegClass);
  addRegisterClass(MVT::v8i16, &PPC::VRRCRegClass);
  addRegisterClass(MVT::v16i8, &PPC::VRRCRegClass);

  setOperationAction(ISD::MUL, MVT::v4f32, Legal);
  setOperationAction(ISD::FMA, MVT::v4f32, Legal);

  if (Subtarget.hasVSX()) {
    setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
    setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
    setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom);
  }

  if (Subtarget.hasP8Altivec())
    setOperationAction(ISD::MUL, MVT::v4i32, Legal);
  else
    setOperationAction(ISD::MUL, MVT::v4i32, Custom);

  if (Subtarget.isISA3_1()) {
    setOperationAction(ISD::MUL, MVT::v2i64, Legal);
    setOperationAction(ISD::MULHS, MVT::v2i64, Legal);
    setOperationAction(ISD::MULHU, MVT::v2i64, Legal);
    setOperationAction(ISD::MULHS, MVT::v4i32, Legal);
    setOperationAction(ISD::MULHU, MVT::v4i32, Legal);
    setOperationAction(ISD::UDIV, MVT::v2i64, Legal);
    setOperationAction(ISD::SDIV, MVT::v2i64, Legal);
    setOperationAction(ISD::UDIV, MVT::v4i32, Legal);
    setOperationAction(ISD::SDIV, MVT::v4i32, Legal);
    setOperationAction(ISD::UREM, MVT::v2i64, Legal);
    setOperationAction(ISD::SREM, MVT::v2i64, Legal);
    setOperationAction(ISD::UREM, MVT::v4i32, Legal);
    setOperationAction(ISD::SREM, MVT::v4i32, Legal);
    setOperationAction(ISD::UREM, MVT::v1i128, Legal);
    setOperationAction(ISD::SREM, MVT::v1i128, Legal);
    setOperationAction(ISD::UDIV, MVT::v1i128, Legal);
    setOperationAction(ISD::SDIV, MVT::v1i128, Legal);
    setOperationAction(ISD::ROTL, MVT::v1i128, Legal);
  }

  setOperationAction(ISD::MUL, MVT::v8i16, Legal);
  setOperationAction(ISD::MUL, MVT::v16i8, Custom);

  setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Custom);
  setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i32, Custom);

  setOperationAction(ISD::BUILD_VECTOR, MVT::v16i8, Custom);
  setOperationAction(ISD::BUILD_VECTOR, MVT::v8i16, Custom);
  setOperationAction(ISD::BUILD_VECTOR, MVT::v4i32, Custom);
  setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);

  // Altivec does not contain unordered floating-point compare instructions
  setCondCodeAction(ISD::SETUO, MVT::v4f32, Expand);
  setCondCodeAction(ISD::SETUEQ, MVT::v4f32, Expand);
  setCondCodeAction(ISD::SETO,   MVT::v4f32, Expand);
  setCondCodeAction(ISD::SETONE, MVT::v4f32, Expand);

  if (Subtarget.hasVSX()) {
    setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2f64, Legal);
    setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Legal);
    if (Subtarget.hasP8Vector()) {
      setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Legal);
      setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Legal);
    }
    if (Subtarget.hasDirectMove() && isPPC64) {
      setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Legal);
      setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Legal);
      setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i32, Legal);
      setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i64, Legal);
      setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Legal);
      setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Legal);
      setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Legal);
      setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Legal);
    }
    setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Legal);

    // The nearbyint variants are not allowed to raise the inexact exception
    // so we can only code-gen them with unsafe math.
    if (TM.Options.UnsafeFPMath) {
      setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal);
      setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal);
    }

    setOperationAction(ISD::FFLOOR, MVT::v2f64, Legal);
    setOperationAction(ISD::FCEIL, MVT::v2f64, Legal);
    setOperationAction(ISD::FTRUNC, MVT::v2f64, Legal);
    setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Legal);
    setOperationAction(ISD::FRINT, MVT::v2f64, Legal);
    setOperationAction(ISD::FROUND, MVT::v2f64, Legal);
    setOperationAction(ISD::FROUND, MVT::f64, Legal);
    setOperationAction(ISD::FRINT, MVT::f64, Legal);

    setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
    setOperationAction(ISD::FRINT, MVT::v4f32, Legal);
    setOperationAction(ISD::FROUND, MVT::v4f32, Legal);
    setOperationAction(ISD::FROUND, MVT::f32, Legal);
    setOperationAction(ISD::FRINT, MVT::f32, Legal);

    setOperationAction(ISD::MUL, MVT::v2f64, Legal);
    setOperationAction(ISD::FMA, MVT::v2f64, Legal);

    setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
    setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);

    // Share the Altivec comparison restrictions.
    setCondCodeAction(ISD::SETUO, MVT::v2f64, Expand);
    setCondCodeAction(ISD::SETUEQ, MVT::v2f64, Expand);
    setCondCodeAction(ISD::SETO,   MVT::v2f64, Expand);
    setCondCodeAction(ISD::SETONE, MVT::v2f64, Expand);

    setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
    setOperationAction(ISD::STORE, MVT::v2f64, Legal);

    setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);

    if (Subtarget.hasP8Vector())
      addRegisterClass(MVT::f32, &PPC::VSSRCRegClass);

    addRegisterClass(MVT::f64, &PPC::VSFRCRegClass);

    addRegisterClass(MVT::v4i32, &PPC::VSRCRegClass);
    addRegisterClass(MVT::v4f32, &PPC::VSRCRegClass);
    addRegisterClass(MVT::v2f64, &PPC::VSRCRegClass);

    if (Subtarget.hasP8Altivec()) {
      setOperationAction(ISD::SHL, MVT::v2i64, Legal);
      setOperationAction(ISD::SRA, MVT::v2i64, Legal);
      setOperationAction(ISD::SRL, MVT::v2i64, Legal);

      // 128 bit shifts can be accomplished via 3 instructions for SHL and
      // SRL, but not for SRA because of the instructions available:
      // VS{RL} and VS{RL}O. However due to direct move costs, it's not worth
      // doing
      setOperationAction(ISD::SHL, MVT::v1i128, Expand);
      setOperationAction(ISD::SRL, MVT::v1i128, Expand);
      setOperationAction(ISD::SRA, MVT::v1i128, Expand);

      setOperationAction(ISD::SETCC, MVT::v2i64, Legal);
    }
    else {
      setOperationAction(ISD::SHL, MVT::v2i64, Expand);
      setOperationAction(ISD::SRA, MVT::v2i64, Expand);
      setOperationAction(ISD::SRL, MVT::v2i64, Expand);

      setOperationAction(ISD::SETCC, MVT::v2i64, Custom);

      // VSX v2i64 only supports non-arithmetic operations.
      setOperationAction(ISD::ADD, MVT::v2i64, Expand);
      setOperationAction(ISD::SUB, MVT::v2i64, Expand);
    }

    if (Subtarget.isISA3_1())
      setOperationAction(ISD::SETCC, MVT::v1i128, Legal);
    else
      setOperationAction(ISD::SETCC, MVT::v1i128, Expand);

    setOperationAction(ISD::LOAD, MVT::v2i64, Promote);
    AddPromotedToType (ISD::LOAD, MVT::v2i64, MVT::v2f64);
    setOperationAction(ISD::STORE, MVT::v2i64, Promote);
    AddPromotedToType (ISD::STORE, MVT::v2i64, MVT::v2f64);

    setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);

    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2i64, Legal);
    setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2i64, Legal);
    setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2i64, Legal);
    setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2i64, Legal);
    setOperationAction(ISD::SINT_TO_FP, MVT::v2i64, Legal);
    setOperationAction(ISD::UINT_TO_FP, MVT::v2i64, Legal);
    setOperationAction(ISD::FP_TO_SINT, MVT::v2i64, Legal);
    setOperationAction(ISD::FP_TO_UINT, MVT::v2i64, Legal);

    // Custom handling for partial vectors of integers converted to
    // floating point. We already have optimal handling for v2i32 through
    // the DAG combine, so those aren't necessary.
    setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2i8, Custom);
    setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i8, Custom);
    setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2i16, Custom);
    setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i16, Custom);
    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2i8, Custom);
    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i8, Custom);
    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2i16, Custom);
    setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i16, Custom);
    setOperationAction(ISD::UINT_TO_FP, MVT::v2i8, Custom);
    setOperationAction(ISD::UINT_TO_FP, MVT::v4i8, Custom);
    setOperationAction(ISD::UINT_TO_FP, MVT::v2i16, Custom);
    setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
    setOperationAction(ISD::SINT_TO_FP, MVT::v2i8, Custom);
    setOperationAction(ISD::SINT_TO_FP, MVT::v4i8, Custom);
    setOperationAction(ISD::SINT_TO_FP, MVT::v2i16, Custom);
    setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom);

    setOperationAction(ISD::FNEG, MVT::v4f32, Legal);
    setOperationAction(ISD::FNEG, MVT::v2f64, Legal);
    setOperationAction(ISD::FABS, MVT::v4f32, Legal);
    setOperationAction(ISD::FABS, MVT::v2f64, Legal);
    setOperationAction(ISD::FCOPYSIGN, MVT::v4f32, Legal);
    setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Legal);

    setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
    setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);

    // Handle constrained floating-point operations of vector.
    // The predictor is `hasVSX` because altivec instruction has
    // no exception but VSX vector instruction has.
    setOperationAction(ISD::STRICT_FADD, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FSUB, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FMUL, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FDIV, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FMA, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FSQRT, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FMAXNUM, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FMINNUM, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FRINT, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FFLOOR, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FCEIL,  MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FTRUNC, MVT::v4f32, Legal);
    setOperationAction(ISD::STRICT_FROUND, MVT::v4f32, Legal);

    setOperationAction(ISD::STRICT_FADD, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FSUB, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FMUL, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FDIV, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FMA, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FSQRT, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FMAXNUM, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FMINNUM, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FRINT, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FFLOOR, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FCEIL,  MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FTRUNC, MVT::v2f64, Legal);
    setOperationAction(ISD::STRICT_FROUND, MVT::v2f64, Legal);

    addRegisterClass(MVT::v2i64, &PPC::VSRCRegClass);
    addRegisterClass(MVT::f128, &PPC::VRRCRegClass);

    for (MVT FPT : MVT::fp_valuetypes())
      setLoadExtAction(ISD::EXTLOAD, MVT::f128, FPT, Expand);

    // Expand the SELECT to SELECT_CC
    setOperationAction(ISD::SELECT, MVT::f128, Expand);

    setTruncStoreAction(MVT::f128, MVT::f64, Expand);
    setTruncStoreAction(MVT::f128, MVT::f32, Expand);

    // No implementation for these ops for PowerPC.
    setOperationAction(ISD::FSIN, MVT::f128, Expand);
    setOperationAction(ISD::FCOS, MVT::f128, Expand);
    setOperationAction(ISD::FPOW, MVT::f128, Expand);
    setOperationAction(ISD::FPOWI, MVT::f128, Expand);
    setOperationAction(ISD::FREM, MVT::f128, Expand);
  }

  if (Subtarget.hasP8Altivec()) {
    addRegisterClass(MVT::v2i64, &PPC::VRRCRegClass);
    addRegisterClass(MVT::v1i128, &PPC::VRRCRegClass);
  }

  if (Subtarget.hasP9Vector()) {
    setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
    setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);

    // Test data class instructions store results in CR bits.
    if (Subtarget.useCRBits()) {
      setOperationAction(ISD::IS_FPCLASS, MVT::f32, Custom);
      setOperationAction(ISD::IS_FPCLASS, MVT::f64, Custom);
      setOperationAction(ISD::IS_FPCLASS, MVT::f128, Custom);
    }

    // 128 bit shifts can be accomplished via 3 instructions for SHL and
    // SRL, but not for SRA because of the instructions available:
    // VS{RL} and VS{RL}O.
    setOperationAction(ISD::SHL, MVT::v1i128, Legal);
    setOperationAction(ISD::SRL, MVT::v1i128, Legal);
    setOperationAction(ISD::SRA, MVT::v1i128, Expand);

    setOperationAction(ISD::FADD, MVT::f128, Legal);
    setOperationAction(ISD::FSUB, MVT::f128, Legal);
    setOperationAction(ISD::FDIV, MVT::f128, Legal);
    setOperationAction(ISD::FMUL, MVT::f128, Legal);
    setOperationAction(ISD::FP_EXTEND, MVT::f128, Legal);

    setOperationAction(ISD::FMA, MVT::f128, Legal);
    setCondCodeAction(ISD::SETULT, MVT::f128, Expand);
    setCondCodeAction(ISD::SETUGT, MVT::f128, Expand);
    setCondCodeAction(ISD::SETUEQ, MVT::f128, Expand);
    setCondCodeAction(ISD::SETOGE, MVT::f128, Expand);
    setCondCodeAction(ISD::SETOLE, MVT::f128, Expand);
    setCondCodeAction(ISD::SETONE, MVT::f128, Expand);

    setOperationAction(ISD::FTRUNC, MVT::f128, Legal);
    setOperationAction(ISD::FRINT, MVT::f128, Legal);
    setOperationAction(ISD::FFLOOR, MVT::f128, Legal);
    setOperationAction(ISD::FCEIL, MVT::f128, Legal);
    setOperationAction(ISD::FNEARBYINT, MVT::f128, Legal);
    setOperationAction(ISD::FROUND, MVT::f128, Legal);

    setOperationAction(ISD::FP_ROUND, MVT::f64, Legal);
    setOperationAction(ISD::FP_ROUND, MVT::f32, Legal);
    setOperationAction(ISD::BITCAST, MVT::i128, Custom);

    // Handle constrained floating-point operations of fp128
    setOperationAction(ISD::STRICT_FADD, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FSUB, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FMUL, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FDIV, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FMA, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FSQRT, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FP_ROUND, MVT::f64, Legal);
    setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Legal);
    setOperationAction(ISD::STRICT_FRINT, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FNEARBYINT, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FFLOOR, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FCEIL, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FTRUNC, MVT::f128, Legal);
    setOperationAction(ISD::STRICT_FROUND, MVT::f128, Legal);
    setOperationAction(ISD::FP_EXTEND, MVT::v2f32, Custom);
    setOperationAction(ISD::BSWAP, MVT::v8i16, Legal);
    setOperationAction(ISD::BSWAP, MVT::v4i32, Legal);
    setOperationAction(ISD::BSWAP, MVT::v2i64, Legal);
    setOperationAction(ISD::BSWAP, MVT::v1i128, Legal);
  } else if (Subtarget.hasVSX()) {
    setOperationAction(ISD::LOAD, MVT::f128, Promote);
    setOperationAction(ISD::STORE, MVT::f128, Promote);

    AddPromotedToType(ISD::LOAD, MVT::f128, MVT::v4i32);
    AddPromotedToType(ISD::STORE, MVT::f128, MVT::v4i32);

    // Set FADD/FSUB as libcall to avoid the legalizer to expand the
    // fp_to_uint and int_to_fp.
    setOperationAction(ISD::FADD, MVT::f128, LibCall);
    setOperationAction(ISD::FSUB, MVT::f128, LibCall);

    setOperationAction(ISD::FMUL, MVT::f128, Expand);
    setOperationAction(ISD::FDIV, MVT::f128, Expand);
    setOperationAction(ISD::FNEG, MVT::f128, Expand);
    setOperationAction(ISD::FABS, MVT::f128, Expand);
    setOperationAction(ISD::FSQRT, MVT::f128, Expand);
    setOperationAction(ISD::FMA, MVT::f128, Expand);
    setOperationAction(ISD::FCOPYSIGN, MVT::f128, Expand);

    // Expand the fp_extend if the target type is fp128.
    setOperationAction(ISD::FP_EXTEND, MVT::f128, Expand);
    setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f128, Expand);

    // Expand the fp_round if the source type is fp128.
    for (MVT VT : {MVT::f32, MVT::f64}) {
      setOperationAction(ISD::FP_ROUND, VT, Custom);
      setOperationAction(ISD::STRICT_FP_ROUND, VT, Custom);
    }

    setOperationAction(ISD::SETCC, MVT::f128, Custom);
    setOperationAction(ISD::STRICT_FSETCC, MVT::f128, Custom);
    setOperationAction(ISD::STRICT_FSETCCS, MVT::f128, Custom);
    setOperationAction(ISD::BR_CC, MVT::f128, Expand);

    // Lower following f128 select_cc pattern:
    // select_cc x, y, tv, fv, cc -> select_cc (setcc x, y, cc), 0, tv, fv, NE
    setOperationAction(ISD::SELECT_CC, MVT::f128, Custom);

    // We need to handle f128 SELECT_CC with integer result type.
    setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
    setOperationAction(ISD::SELECT_CC, MVT::i64, isPPC64 ? Custom : Expand);
  }

  if (Subtarget.hasP9Altivec()) {
    if (Subtarget.isISA3_1()) {
      setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Legal);
      setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Legal);
      setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Legal);
      setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Legal);
    } else {
      setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
      setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
    }
    setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i8,  Legal);
    setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i16, Legal);
    setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i32, Legal);
    setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i8,  Legal);
    setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i16, Legal);
    setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i32, Legal);
    setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i64, Legal);

    setOperationAction(ISD::ABDU, MVT::v16i8, Legal);
    setOperationAction(ISD::ABDU, MVT::v8i16, Legal);
    setOperationAction(ISD::ABDU, MVT::v4i32, Legal);
    setOperationAction(ISD::ABDS, MVT::v4i32, Legal);
  }

  if (Subtarget.hasP10Vector()) {
    setOperationAction(ISD::SELECT_CC, MVT::f128, Custom);
  }
}

if (Subtarget.pairedVectorMemops()) {
  addRegisterClass(MVT::v256i1, &PPC::VSRpRCRegClass);
  setOperationAction(ISD::LOAD, MVT::v256i1, Custom);
  setOperationAction(ISD::STORE, MVT::v256i1, Custom);
}
if (Subtarget.hasMMA()) {
  if (Subtarget.isISAFuture())
    addRegisterClass(MVT::v512i1, &PPC::WACCRCRegClass);
  else
    addRegisterClass(MVT::v512i1, &PPC::UACCRCRegClass);
  setOperationAction(ISD::LOAD, MVT::v512i1, Custom);
  setOperationAction(ISD::STORE, MVT::v512i1, Custom);
  setOperationAction(ISD::BUILD_VECTOR, MVT::v512i1, Custom);
}

if (Subtarget.has64BitSupport())
  setOperationAction(ISD::PREFETCH, MVT::Other, Legal);

if (Subtarget.isISA3_1())
  setOperationAction(ISD::SRA, MVT::v1i128, Legal);

setOperationAction(ISD::READCYCLECOUNTER, MVT::i64, isPPC64 ? Legal : Custom);

if (!isPPC64) {
  setOperationAction(ISD::ATOMIC_LOAD,  MVT::i64, Expand);
  setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand);
}

if (shouldInlineQuadwordAtomics()) {
  setOperationAction(ISD::ATOMIC_LOAD, MVT::i128, Custom);
  setOperationAction(ISD::ATOMIC_STORE, MVT::i128, Custom);
  setOperationAction(ISD::INTRINSIC_VOID, MVT::i128, Custom);
}

setBooleanContents(ZeroOrOneBooleanContent);

if (Subtarget.hasAltivec()) {
  // Altivec instructions set fields to all zeros or all ones.
  setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
}

setLibcallName(RTLIB::MULO_I128, nullptr);
if (!isPPC64) {
  // These libcalls are not available in 32-bit.
  setLibcallName(RTLIB::SHL_I128, nullptr);
  setLibcallName(RTLIB::SRL_I128, nullptr);
  setLibcallName(RTLIB::SRA_I128, nullptr);
  setLibcallName(RTLIB::MUL_I128, nullptr);
  setLibcallName(RTLIB::MULO_I64, nullptr);
}

if (!isPPC64)
  setMaxAtomicSizeInBitsSupported(32);
else if (shouldInlineQuadwordAtomics())
  setMaxAtomicSizeInBitsSupported(128);
else
  setMaxAtomicSizeInBitsSupported(64);

setStackPointerRegisterToSaveRestore(isPPC64 ? PPC::X1 : PPC::R1);

// We have target-specific dag combine patterns for the following nodes:
setTargetDAGCombine({ISD::ADD, ISD::SHL, ISD::SRA, ISD::SRL, ISD::MUL,
                     ISD::FMA, ISD::SINT_TO_FP, ISD::BUILD_VECTOR});
if (Subtarget.hasFPCVT())
  setTargetDAGCombine(ISD::UINT_TO_FP);
setTargetDAGCombine({ISD::LOAD, ISD::STORE, ISD::BR_CC});
if (Subtarget.useCRBits())
  setTargetDAGCombine(ISD::BRCOND);
setTargetDAGCombine({ISD::BSWAP, ISD::INTRINSIC_WO_CHAIN,
                     ISD::INTRINSIC_W_CHAIN, ISD::INTRINSIC_VOID});

setTargetDAGCombine({ISD::SIGN_EXTEND, ISD::ZERO_EXTEND, ISD::ANY_EXTEND});

setTargetDAGCombine({ISD::TRUNCATE, ISD::VECTOR_SHUFFLE});

if (Subtarget.useCRBits()) {
  setTargetDAGCombine({ISD::TRUNCATE, ISD::SETCC, ISD::SELECT_CC});
}

setLibcallName(RTLIB::LOG_F128, "logf128");
setLibcallName(RTLIB::LOG2_F128, "log2f128");
setLibcallName(RTLIB::LOG10_F128, "log10f128");
setLibcallName(RTLIB::EXP_F128, "expf128");
setLibcallName(RTLIB::EXP2_F128, "exp2f128");
setLibcallName(RTLIB::SIN_F128, "sinf128");
setLibcallName(RTLIB::COS_F128, "cosf128");
setLibcallName(RTLIB::POW_F128, "powf128");
setLibcallName(RTLIB::FMIN_F128, "fminf128");
setLibcallName(RTLIB::FMAX_F128, "fmaxf128");
setLibcallName(RTLIB::REM_F128, "fmodf128");
setLibcallName(RTLIB::SQRT_F128, "sqrtf128");
setLibcallName(RTLIB::CEIL_F128, "ceilf128");
setLibcallName(RTLIB::FLOOR_F128, "floorf128");
setLibcallName(RTLIB::TRUNC_F128, "truncf128");
setLibcallName(RTLIB::ROUND_F128, "roundf128");
setLibcallName(RTLIB::LROUND_F128, "lroundf128");
setLibcallName(RTLIB::LLROUND_F128, "llroundf128");
setLibcallName(RTLIB::RINT_F128, "rintf128");
setLibcallName(RTLIB::LRINT_F128, "lrintf128");
setLibcallName(RTLIB::LLRINT_F128, "llrintf128");
setLibcallName(RTLIB::NEARBYINT_F128, "nearbyintf128");
setLibcallName(RTLIB::FMA_F128, "fmaf128");

if (Subtarget.isAIXABI()) {
  setLibcallName(RTLIB::MEMCPY, isPPC64 ? "___memmove64" : "___memmove");
  setLibcallName(RTLIB::MEMMOVE, isPPC64 ? "___memmove64" : "___memmove");
  setLibcallName(RTLIB::MEMSET, isPPC64 ? "___memset64" : "___memset");
  setLibcallName(RTLIB::BZERO, isPPC64 ? "___bzero64" : "___bzero");
}

// With 32 condition bits, we don't need to sink (and duplicate) compares
// aggressively in CodeGenPrep.
if (Subtarget.useCRBits()) {
  setHasMultipleConditionRegisters();
  setJumpIsExpensive();
}

setMinFunctionAlignment(Align(4));

switch (Subtarget.getCPUDirective()) {
default: break;
case PPC::DIR_970:
case PPC::DIR_A2:
case PPC::DIR_E500:
case PPC::DIR_E500mc:
case PPC::DIR_E5500:
case PPC::DIR_PWR4:
case PPC::DIR_PWR5:
case PPC::DIR_PWR5X:
case PPC::DIR_PWR6:
case PPC::DIR_PWR6X:
case PPC::DIR_PWR7:
case PPC::DIR_PWR8:
case PPC::DIR_PWR9:
case PPC::DIR_PWR10:
case PPC::DIR_PWR_FUTURE:
  setPrefLoopAlignment(Align(16));
  setPrefFunctionAlignment(Align(16));
  break;
}

if (Subtarget.enableMachineScheduler())
  setSchedulingPreference(Sched::Source);
else
  setSchedulingPreference(Sched::Hybrid);

computeRegisterProperties(STI.getRegisterInfo());

// The Freescale cores do better with aggressive inlining of memcpy and
// friends. GCC uses same threshold of 128 bytes (= 32 word stores).
if (Subtarget.getCPUDirective() == PPC::DIR_E500mc ||
    Subtarget.getCPUDirective() == PPC::DIR_E5500) {
  MaxStoresPerMemset = 32;
  MaxStoresPerMemsetOptSize = 16;
  MaxStoresPerMemcpy = 32;
  MaxStoresPerMemcpyOptSize = 8;
  MaxStoresPerMemmove = 32;
  MaxStoresPerMemmoveOptSize = 8;
} else if (Subtarget.getCPUDirective() == PPC::DIR_A2) {
  // The A2 also benefits from (very) aggressive inlining of memcpy and
  // friends. The overhead of a the function call, even when warm, can be
  // over one hundred cycles.
  MaxStoresPerMemset = 128;
  MaxStoresPerMemcpy = 128;
  MaxStoresPerMemmove = 128;
  MaxLoadsPerMemcmp = 128;
} else {
  MaxLoadsPerMemcmp = 8;
  MaxLoadsPerMemcmpOptSize = 4;
}

IsStrictFPEnabled = true;

// Let the subtarget (CPU) decide if a predictable select is more expensive
// than the corresponding branch. This information is used in CGP to decide
// when to convert selects into branches.
PredictableSelectIsExpensive = Subtarget.isPredictableSelectIsExpensive();
1498}

1500// *********************************** NOTE ************************************
1501// For selecting load and store instructions, the addressing modes are defined
1502// as ComplexPatterns in PPCInstrInfo.td, which are then utilized in the TD
1503// patterns to match the load the store instructions.
1504//
1505// The TD definitions for the addressing modes correspond to their respective
1506// Select<AddrMode>Form() function in PPCISelDAGToDAG.cpp. These functions rely
1507// on SelectOptimalAddrMode(), which calls computeMOFlags() to compute the
1508// address mode flags of a particular node. Afterwards, the computed address
1509// flags are passed into getAddrModeForFlags() in order to retrieve the optimal
1510// addressing mode. SelectOptimalAddrMode() then sets the Base and Displacement
1511// accordingly, based on the preferred addressing mode.
1512//
1513// Within PPCISelLowering.h, there are two enums: MemOpFlags and AddrMode.
1514// MemOpFlags contains all the possible flags that can be used to compute the
1515// optimal addressing mode for load and store instructions.
1516// AddrMode contains all the possible load and store addressing modes available
1517// on Power (such as DForm, DSForm, DQForm, XForm, etc.)
1518//
1519// When adding new load and store instructions, it is possible that new address
1520// flags may need to be added into MemOpFlags, and a new addressing mode will
1521// need to be added to AddrMode. An entry of the new addressing mode (consisting
1522// of the minimal and main distinguishing address flags for the new load/store
1523// instructions) will need to be added into initializeAddrModeMap() below.
1524// Finally, when adding new addressing modes, the getAddrModeForFlags() will
1525// need to be updated to account for selecting the optimal addressing mode.
1526// *****************************************************************************
1527/// Initialize the map that relates the different addressing modes of the load
1528/// and store instructions to a set of flags. This ensures the load/store
1529/// instruction is correctly matched during instruction selection.
1530void PPCTargetLowering::initializeAddrModeMap() {
AddrModesMap[PPC::AM_DForm] = {
    // LWZ, STW
    PPC::MOF_ZExt | PPC::MOF_RPlusSImm16 | PPC::MOF_WordInt,
    PPC::MOF_ZExt | PPC::MOF_RPlusLo | PPC::MOF_WordInt,
    PPC::MOF_ZExt | PPC::MOF_NotAddNorCst | PPC::MOF_WordInt,
    PPC::MOF_ZExt | PPC::MOF_AddrIsSImm32 | PPC::MOF_WordInt,
    // LBZ, LHZ, STB, STH
    PPC::MOF_ZExt | PPC::MOF_RPlusSImm16 | PPC::MOF_SubWordInt,
    PPC::MOF_ZExt | PPC::MOF_RPlusLo | PPC::MOF_SubWordInt,
    PPC::MOF_ZExt | PPC::MOF_NotAddNorCst | PPC::MOF_SubWordInt,
    PPC::MOF_ZExt | PPC::MOF_AddrIsSImm32 | PPC::MOF_SubWordInt,
    // LHA
    PPC::MOF_SExt | PPC::MOF_RPlusSImm16 | PPC::MOF_SubWordInt,
    PPC::MOF_SExt | PPC::MOF_RPlusLo | PPC::MOF_SubWordInt,
    PPC::MOF_SExt | PPC::MOF_NotAddNorCst | PPC::MOF_SubWordInt,
    PPC::MOF_SExt | PPC::MOF_AddrIsSImm32 | PPC::MOF_SubWordInt,
    // LFS, LFD, STFS, STFD
    PPC::MOF_RPlusSImm16 | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetBeforeP9,
    PPC::MOF_RPlusLo | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetBeforeP9,
    PPC::MOF_NotAddNorCst | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetBeforeP9,
    PPC::MOF_AddrIsSImm32 | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetBeforeP9,
};
AddrModesMap[PPC::AM_DSForm] = {
    // LWA
    PPC::MOF_SExt | PPC::MOF_RPlusSImm16Mult4 | PPC::MOF_WordInt,
    PPC::MOF_SExt | PPC::MOF_NotAddNorCst | PPC::MOF_WordInt,
    PPC::MOF_SExt | PPC::MOF_AddrIsSImm32 | PPC::MOF_WordInt,
    // LD, STD
    PPC::MOF_RPlusSImm16Mult4 | PPC::MOF_DoubleWordInt,
    PPC::MOF_NotAddNorCst | PPC::MOF_DoubleWordInt,
    PPC::MOF_AddrIsSImm32 | PPC::MOF_DoubleWordInt,
    // DFLOADf32, DFLOADf64, DSTOREf32, DSTOREf64
    PPC::MOF_RPlusSImm16Mult4 | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetP9,
    PPC::MOF_NotAddNorCst | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetP9,
    PPC::MOF_AddrIsSImm32 | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetP9,
};
AddrModesMap[PPC::AM_DQForm] = {
    // LXV, STXV
    PPC::MOF_RPlusSImm16Mult16 | PPC::MOF_Vector | PPC::MOF_SubtargetP9,
    PPC::MOF_NotAddNorCst | PPC::MOF_Vector | PPC::MOF_SubtargetP9,
    PPC::MOF_AddrIsSImm32 | PPC::MOF_Vector | PPC::MOF_SubtargetP9,
};
AddrModesMap[PPC::AM_PrefixDForm] = {PPC::MOF_RPlusSImm34 |
                                     PPC::MOF_SubtargetP10};
// TODO: Add mapping for quadword load/store.
1576}

1578/// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1579/// the desired ByVal argument alignment.
1580static void getMaxByValAlign(Type *Ty, Align &MaxAlign, Align MaxMaxAlign) {
if (MaxAlign == MaxMaxAlign)
  return;
if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
  if (MaxMaxAlign >= 32 &&
      VTy->getPrimitiveSizeInBits().getFixedValue() >= 256)
    MaxAlign = Align(32);
  else if (VTy->getPrimitiveSizeInBits().getFixedValue() >= 128 &&
           MaxAlign < 16)
    MaxAlign = Align(16);
} else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
  Align EltAlign;
  getMaxByValAlign(ATy->getElementType(), EltAlign, MaxMaxAlign);
  if (EltAlign > MaxAlign)
    MaxAlign = EltAlign;
} else if (StructType *STy = dyn_cast<StructType>(Ty)) {
  for (auto *EltTy : STy->elements()) {
    Align EltAlign;
    getMaxByValAlign(EltTy, EltAlign, MaxMaxAlign);
    if (EltAlign > MaxAlign)
      MaxAlign = EltAlign;
    if (MaxAlign == MaxMaxAlign)
      break;
  }
}
1605}

1607/// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1608/// function arguments in the caller parameter area.
1609uint64_t PPCTargetLowering::getByValTypeAlignment(Type *Ty,
                                                const DataLayout &DL) const {
// 16byte and wider vectors are passed on 16byte boundary.
// The rest is 8 on PPC64 and 4 on PPC32 boundary.
Align Alignment = Subtarget.isPPC64() ? Align(8) : Align(4);
if (Subtarget.hasAltivec())
  getMaxByValAlign(Ty, Alignment, Align(16));
return Alignment.value();
1617}

1619bool PPCTargetLowering::useSoftFloat() const {
return Subtarget.useSoftFloat();
1621}

1623bool PPCTargetLowering::hasSPE() const {
return Subtarget.hasSPE();
1625}

1627bool PPCTargetLowering::preferIncOfAddToSubOfNot(EVT VT) const {
return VT.isScalarInteger();
1629}

1631const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const {
switch ((PPCISD::NodeType)Opcode) {
case PPCISD::FIRST_NUMBER:    break;
case PPCISD::FSEL:            return "PPCISD::FSEL";
case PPCISD::XSMAXC:          return "PPCISD::XSMAXC";
case PPCISD::XSMINC:          return "PPCISD::XSMINC";
case PPCISD::FCFID:           return "PPCISD::FCFID";
case PPCISD::FCFIDU:          return "PPCISD::FCFIDU";
case PPCISD::FCFIDS:          return "PPCISD::FCFIDS";
case PPCISD::FCFIDUS:         return "PPCISD::FCFIDUS";
case PPCISD::FCTIDZ:          return "PPCISD::FCTIDZ";
case PPCISD::FCTIWZ:          return "PPCISD::FCTIWZ";
case PPCISD::FCTIDUZ:         return "PPCISD::FCTIDUZ";
case PPCISD::FCTIWUZ:         return "PPCISD::FCTIWUZ";
case PPCISD::FP_TO_UINT_IN_VSR:
                              return "PPCISD::FP_TO_UINT_IN_VSR,";
case PPCISD::FP_TO_SINT_IN_VSR:
                              return "PPCISD::FP_TO_SINT_IN_VSR";
case PPCISD::FRE:             return "PPCISD::FRE";
case PPCISD::FRSQRTE:         return "PPCISD::FRSQRTE";
case PPCISD::FTSQRT:
  return "PPCISD::FTSQRT";
case PPCISD::FSQRT:
  return "PPCISD::FSQRT";
case PPCISD::STFIWX:          return "PPCISD::STFIWX";
case PPCISD::VPERM:           return "PPCISD::VPERM";
case PPCISD::XXSPLT:          return "PPCISD::XXSPLT";
case PPCISD::XXSPLTI_SP_TO_DP:
  return "PPCISD::XXSPLTI_SP_TO_DP";
case PPCISD::XXSPLTI32DX:
  return "PPCISD::XXSPLTI32DX";
case PPCISD::VECINSERT:       return "PPCISD::VECINSERT";
case PPCISD::XXPERMDI:        return "PPCISD::XXPERMDI";
case PPCISD::XXPERM:
  return "PPCISD::XXPERM";
case PPCISD::VECSHL:          return "PPCISD::VECSHL";
case PPCISD::CMPB:            return "PPCISD::CMPB";
case PPCISD::Hi:              return "PPCISD::Hi";
case PPCISD::Lo:              return "PPCISD::Lo";
case PPCISD::TOC_ENTRY:       return "PPCISD::TOC_ENTRY";
case PPCISD::ATOMIC_CMP_SWAP_8: return "PPCISD::ATOMIC_CMP_SWAP_8";
case PPCISD::ATOMIC_CMP_SWAP_16: return "PPCISD::ATOMIC_CMP_SWAP_16";
case PPCISD::DYNALLOC:        return "PPCISD::DYNALLOC";
case PPCISD::DYNAREAOFFSET:   return "PPCISD::DYNAREAOFFSET";
case PPCISD::PROBED_ALLOCA:   return "PPCISD::PROBED_ALLOCA";
case PPCISD::GlobalBaseReg:   return "PPCISD::GlobalBaseReg";
case PPCISD::SRL:             return "PPCISD::SRL";
case PPCISD::SRA:             return "PPCISD::SRA";
case PPCISD::SHL:             return "PPCISD::SHL";
case PPCISD::SRA_ADDZE:       return "PPCISD::SRA_ADDZE";
case PPCISD::CALL:            return "PPCISD::CALL";
case PPCISD::CALL_NOP:        return "PPCISD::CALL_NOP";
case PPCISD::CALL_NOTOC:      return "PPCISD::CALL_NOTOC";
case PPCISD::CALL_RM:
  return "PPCISD::CALL_RM";
case PPCISD::CALL_NOP_RM:
  return "PPCISD::CALL_NOP_RM";
case PPCISD::CALL_NOTOC_RM:
  return "PPCISD::CALL_NOTOC_RM";
case PPCISD::MTCTR:           return "PPCISD::MTCTR";
case PPCISD::BCTRL:           return "PPCISD::BCTRL";
case PPCISD::BCTRL_LOAD_TOC:  return "PPCISD::BCTRL_LOAD_TOC";
case PPCISD::BCTRL_RM:
  return "PPCISD::BCTRL_RM";
case PPCISD::BCTRL_LOAD_TOC_RM:
  return "PPCISD::BCTRL_LOAD_TOC_RM";
case PPCISD::RET_GLUE:        return "PPCISD::RET_GLUE";
case PPCISD::READ_TIME_BASE:  return "PPCISD::READ_TIME_BASE";
case PPCISD::EH_SJLJ_SETJMP:  return "PPCISD::EH_SJLJ_SETJMP";
case PPCISD::EH_SJLJ_LONGJMP: return "PPCISD::EH_SJLJ_LONGJMP";
case PPCISD::MFOCRF:          return "PPCISD::MFOCRF";
case PPCISD::MFVSR:           return "PPCISD::MFVSR";
case PPCISD::MTVSRA:          return "PPCISD::MTVSRA";
case PPCISD::MTVSRZ:          return "PPCISD::MTVSRZ";
case PPCISD::SINT_VEC_TO_FP:  return "PPCISD::SINT_VEC_TO_FP";
case PPCISD::UINT_VEC_TO_FP:  return "PPCISD::UINT_VEC_TO_FP";
case PPCISD::SCALAR_TO_VECTOR_PERMUTED:
  return "PPCISD::SCALAR_TO_VECTOR_PERMUTED";
case PPCISD::ANDI_rec_1_EQ_BIT:
  return "PPCISD::ANDI_rec_1_EQ_BIT";
case PPCISD::ANDI_rec_1_GT_BIT:
  return "PPCISD::ANDI_rec_1_GT_BIT";
case PPCISD::VCMP:            return "PPCISD::VCMP";
case PPCISD::VCMP_rec:        return "PPCISD::VCMP_rec";
case PPCISD::LBRX:            return "PPCISD::LBRX";
case PPCISD::STBRX:           return "PPCISD::STBRX";
case PPCISD::LFIWAX:          return "PPCISD::LFIWAX";
case PPCISD::LFIWZX:          return "PPCISD::LFIWZX";
case PPCISD::LXSIZX:          return "PPCISD::LXSIZX";
case PPCISD::STXSIX:          return "PPCISD::STXSIX";
case PPCISD::VEXTS:           return "PPCISD::VEXTS";
case PPCISD::LXVD2X:          return "PPCISD::LXVD2X";
case PPCISD::STXVD2X:         return "PPCISD::STXVD2X";
case PPCISD::LOAD_VEC_BE:     return "PPCISD::LOAD_VEC_BE";
case PPCISD::STORE_VEC_BE:    return "PPCISD::STORE_VEC_BE";
case PPCISD::ST_VSR_SCAL_INT:
                              return "PPCISD::ST_VSR_SCAL_INT";
case PPCISD::COND_BRANCH:     return "PPCISD::COND_BRANCH";
case PPCISD::BDNZ:            return "PPCISD::BDNZ";
case PPCISD::BDZ:             return "PPCISD::BDZ";
case PPCISD::MFFS:            return "PPCISD::MFFS";
case PPCISD::FADDRTZ:         return "PPCISD::FADDRTZ";
case PPCISD::TC_RETURN:       return "PPCISD::TC_RETURN";
case PPCISD::CR6SET:          return "PPCISD::CR6SET";
case PPCISD::CR6UNSET:        return "PPCISD::CR6UNSET";
case PPCISD::PPC32_GOT:       return "PPCISD::PPC32_GOT";
case PPCISD::PPC32_PICGOT:    return "PPCISD::PPC32_PICGOT";
case PPCISD::ADDIS_GOT_TPREL_HA: return "PPCISD::ADDIS_GOT_TPREL_HA";
case PPCISD::LD_GOT_TPREL_L:  return "PPCISD::LD_GOT_TPREL_L";
case PPCISD::ADD_TLS:         return "PPCISD::ADD_TLS";
case PPCISD::ADDIS_TLSGD_HA:  return "PPCISD::ADDIS_TLSGD_HA";
case PPCISD::ADDI_TLSGD_L:    return "PPCISD::ADDI_TLSGD_L";
case PPCISD::GET_TLS_ADDR:    return "PPCISD::GET_TLS_ADDR";
case PPCISD::ADDI_TLSGD_L_ADDR: return "PPCISD::ADDI_TLSGD_L_ADDR";
case PPCISD::TLSGD_AIX:       return "PPCISD::TLSGD_AIX";
case PPCISD::ADDIS_TLSLD_HA:  return "PPCISD::ADDIS_TLSLD_HA";
case PPCISD::ADDI_TLSLD_L:    return "PPCISD::ADDI_TLSLD_L";
case PPCISD::GET_TLSLD_ADDR:  return "PPCISD::GET_TLSLD_ADDR";
case PPCISD::ADDI_TLSLD_L_ADDR: return "PPCISD::ADDI_TLSLD_L_ADDR";
case PPCISD::ADDIS_DTPREL_HA: return "PPCISD::ADDIS_DTPREL_HA";
case PPCISD::ADDI_DTPREL_L:   return "PPCISD::ADDI_DTPREL_L";
case PPCISD::PADDI_DTPREL:
  return "PPCISD::PADDI_DTPREL";
case PPCISD::VADD_SPLAT:      return "PPCISD::VADD_SPLAT";
case PPCISD::SC:              return "PPCISD::SC";
case PPCISD::CLRBHRB:         return "PPCISD::CLRBHRB";
case PPCISD::MFBHRBE:         return "PPCISD::MFBHRBE";
case PPCISD::RFEBB:           return "PPCISD::RFEBB";
case PPCISD::XXSWAPD:         return "PPCISD::XXSWAPD";
case PPCISD::SWAP_NO_CHAIN:   return "PPCISD::SWAP_NO_CHAIN";
case PPCISD::BUILD_FP128:     return "PPCISD::BUILD_FP128";
case PPCISD::BUILD_SPE64:     return "PPCISD::BUILD_SPE64";
case PPCISD::EXTRACT_SPE:     return "PPCISD::EXTRACT_SPE";
case PPCISD::EXTSWSLI:        return "PPCISD::EXTSWSLI";
case PPCISD::LD_VSX_LH:       return "PPCISD::LD_VSX_LH";
case PPCISD::FP_EXTEND_HALF:  return "PPCISD::FP_EXTEND_HALF";
case PPCISD::MAT_PCREL_ADDR:  return "PPCISD::MAT_PCREL_ADDR";
case PPCISD::TLS_DYNAMIC_MAT_PCREL_ADDR:
  return "PPCISD::TLS_DYNAMIC_MAT_PCREL_ADDR";
case PPCISD::TLS_LOCAL_EXEC_MAT_ADDR:
  return "PPCISD::TLS_LOCAL_EXEC_MAT_ADDR";
case PPCISD::ACC_BUILD:       return "PPCISD::ACC_BUILD";
case PPCISD::PAIR_BUILD:      return "PPCISD::PAIR_BUILD";
case PPCISD::EXTRACT_VSX_REG: return "PPCISD::EXTRACT_VSX_REG";
case PPCISD::XXMFACC:         return "PPCISD::XXMFACC";
case PPCISD::LD_SPLAT:        return "PPCISD::LD_SPLAT";
case PPCISD::ZEXT_LD_SPLAT:   return "PPCISD::ZEXT_LD_SPLAT";
case PPCISD::SEXT_LD_SPLAT:   return "PPCISD::SEXT_LD_SPLAT";
case PPCISD::FNMSUB:          return "PPCISD::FNMSUB";
case PPCISD::STRICT_FADDRTZ:
  return "PPCISD::STRICT_FADDRTZ";
case PPCISD::STRICT_FCTIDZ:
  return "PPCISD::STRICT_FCTIDZ";
case PPCISD::STRICT_FCTIWZ:
  return "PPCISD::STRICT_FCTIWZ";
case PPCISD::STRICT_FCTIDUZ:
  return "PPCISD::STRICT_FCTIDUZ";
case PPCISD::STRICT_FCTIWUZ:
  return "PPCISD::STRICT_FCTIWUZ";
case PPCISD::STRICT_FCFID:
  return "PPCISD::STRICT_FCFID";
case PPCISD::STRICT_FCFIDU:
  return "PPCISD::STRICT_FCFIDU";
case PPCISD::STRICT_FCFIDS:
  return "PPCISD::STRICT_FCFIDS";
case PPCISD::STRICT_FCFIDUS:
  return "PPCISD::STRICT_FCFIDUS";
case PPCISD::LXVRZX:          return "PPCISD::LXVRZX";
case PPCISD::STORE_COND:
  return "PPCISD::STORE_COND";
}
return nullptr;
1803}

1805EVT PPCTargetLowering::getSetCCResultType(const DataLayout &DL, LLVMContext &C,
                                        EVT VT) const {
if (!VT.isVector())
  return Subtarget.useCRBits() ? MVT::i1 : MVT::i32;

return VT.changeVectorElementTypeToInteger();
1811}

1813bool PPCTargetLowering::enableAggressiveFMAFusion(EVT VT) const {
assert(VT.isFloatingPoint() && "Non-floating-point FMA?")(static_cast <bool> (VT.isFloatingPoint() && "Non-floating-point FMA?"
) ? void (0) : __assert_fail ("VT.isFloatingPoint() && \"Non-floating-point FMA?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 1814, __extension__
 __PRETTY_FUNCTION__));
return true;
1816}

1818//===----------------------------------------------------------------------===//
1819// Node matching predicates, for use by the tblgen matching code.
1820//===----------------------------------------------------------------------===//

1822/// isFloatingPointZero - Return true if this is 0.0 or -0.0.
1823static bool isFloatingPointZero(SDValue Op) {
if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
  return CFP->getValueAPF().isZero();
else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
  // Maybe this has already been legalized into the constant pool?
  if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Op.getOperand(1)))
    if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
      return CFP->getValueAPF().isZero();
}
return false;
1833}

1835/// isConstantOrUndef - Op is either an undef node or a ConstantSDNode.  Return
1836/// true if Op is undef or if it matches the specified value.
1837static bool isConstantOrUndef(int Op, int Val) {
return Op < 0 || Op == Val;
1839}

1841/// isVPKUHUMShuffleMask - Return true if this is the shuffle mask for a
1842/// VPKUHUM instruction.
1843/// The ShuffleKind distinguishes between big-endian operations with
1844/// two different inputs (0), either-endian operations with two identical
1845/// inputs (1), and little-endian operations with two different inputs (2).
1846/// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
1847bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
                             SelectionDAG &DAG) {
bool IsLE = DAG.getDataLayout().isLittleEndian();
if (ShuffleKind == 0) {
  if (IsLE)
    return false;
  for (unsigned i = 0; i != 16; ++i)
    if (!isConstantOrUndef(N->getMaskElt(i), i*2+1))
      return false;
} else if (ShuffleKind == 2) {
  if (!IsLE)
    return false;
  for (unsigned i = 0; i != 16; ++i)
    if (!isConstantOrUndef(N->getMaskElt(i), i*2))
      return false;
} else if (ShuffleKind == 1) {
  unsigned j = IsLE ? 0 : 1;
  for (unsigned i = 0; i != 8; ++i)
    if (!isConstantOrUndef(N->getMaskElt(i),    i*2+j) ||
        !isConstantOrUndef(N->getMaskElt(i+8),  i*2+j))
      return false;
}
return true;
1870}

1872/// isVPKUWUMShuffleMask - Return true if this is the shuffle mask for a
1873/// VPKUWUM instruction.
1874/// The ShuffleKind distinguishes between big-endian operations with
1875/// two different inputs (0), either-endian operations with two identical
1876/// inputs (1), and little-endian operations with two different inputs (2).
1877/// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
1878bool PPC::isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
                             SelectionDAG &DAG) {
bool IsLE = DAG.getDataLayout().isLittleEndian();
if (ShuffleKind == 0) {
  if (IsLE)
    return false;
  for (unsigned i = 0; i != 16; i += 2)
    if (!isConstantOrUndef(N->getMaskElt(i  ),  i*2+2) ||
        !isConstantOrUndef(N->getMaskElt(i+1),  i*2+3))
      return false;
} else if (ShuffleKind == 2) {
  if (!IsLE)
    return false;
  for (unsigned i = 0; i != 16; i += 2)
    if (!isConstantOrUndef(N->getMaskElt(i  ),  i*2) ||
        !isConstantOrUndef(N->getMaskElt(i+1),  i*2+1))
      return false;
} else if (ShuffleKind == 1) {
  unsigned j = IsLE ? 0 : 2;
  for (unsigned i = 0; i != 8; i += 2)
    if (!isConstantOrUndef(N->getMaskElt(i  ),  i*2+j)   ||
        !isConstantOrUndef(N->getMaskElt(i+1),  i*2+j+1) ||
        !isConstantOrUndef(N->getMaskElt(i+8),  i*2+j)   ||
        !isConstantOrUndef(N->getMaskElt(i+9),  i*2+j+1))
      return false;
}
return true;
1905}

1907/// isVPKUDUMShuffleMask - Return true if this is the shuffle mask for a
1908/// VPKUDUM instruction, AND the VPKUDUM instruction exists for the
1909/// current subtarget.
1910///
1911/// The ShuffleKind distinguishes between big-endian operations with
1912/// two different inputs (0), either-endian operations with two identical
1913/// inputs (1), and little-endian operations with two different inputs (2).
1914/// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
1915bool PPC::isVPKUDUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
                             SelectionDAG &DAG) {
const PPCSubtarget &Subtarget = DAG.getSubtarget<PPCSubtarget>();
if (!Subtarget.hasP8Vector())
  return false;

bool IsLE = DAG.getDataLayout().isLittleEndian();
if (ShuffleKind == 0) {
  if (IsLE)
    return false;
  for (unsigned i = 0; i != 16; i += 4)
    if (!isConstantOrUndef(N->getMaskElt(i  ),  i*2+4) ||
        !isConstantOrUndef(N->getMaskElt(i+1),  i*2+5) ||
        !isConstantOrUndef(N->getMaskElt(i+2),  i*2+6) ||
        !isConstantOrUndef(N->getMaskElt(i+3),  i*2+7))
      return false;
} else if (ShuffleKind == 2) {
  if (!IsLE)
    return false;
  for (unsigned i = 0; i != 16; i += 4)
    if (!isConstantOrUndef(N->getMaskElt(i  ),  i*2) ||
        !isConstantOrUndef(N->getMaskElt(i+1),  i*2+1) ||
        !isConstantOrUndef(N->getMaskElt(i+2),  i*2+2) ||
        !isConstantOrUndef(N->getMaskElt(i+3),  i*2+3))
      return false;
} else if (ShuffleKind == 1) {
  unsigned j = IsLE ? 0 : 4;
  for (unsigned i = 0; i != 8; i += 4)
    if (!isConstantOrUndef(N->getMaskElt(i  ),  i*2+j)   ||
        !isConstantOrUndef(N->getMaskElt(i+1),  i*2+j+1) ||
        !isConstantOrUndef(N->getMaskElt(i+2),  i*2+j+2) ||
        !isConstantOrUndef(N->getMaskElt(i+3),  i*2+j+3) ||
        !isConstantOrUndef(N->getMaskElt(i+8),  i*2+j)   ||
        !isConstantOrUndef(N->getMaskElt(i+9),  i*2+j+1) ||
        !isConstantOrUndef(N->getMaskElt(i+10), i*2+j+2) ||
        !isConstantOrUndef(N->getMaskElt(i+11), i*2+j+3))
      return false;
}
return true;
1954}

1956/// isVMerge - Common function, used to match vmrg* shuffles.
1957///
1958static bool isVMerge(ShuffleVectorSDNode *N, unsigned UnitSize,
                   unsigned LHSStart, unsigned RHSStart) {
if (N->getValueType(0) != MVT::v16i8)
  return false;
assert((UnitSize == 1 || UnitSize == 2 || UnitSize == 4) &&(static_cast <bool> ((UnitSize == 1 || UnitSize == 2 ||
 UnitSize == 4) && "Unsupported merge size!") ? void (
0) : __assert_fail ("(UnitSize == 1 || UnitSize == 2 || UnitSize == 4) && \"Unsupported merge size!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 1963, __extension__
 __PRETTY_FUNCTION__))
       "Unsupported merge size!")(static_cast <bool> ((UnitSize == 1 || UnitSize == 2 ||
 UnitSize == 4) && "Unsupported merge size!") ? void (
0) : __assert_fail ("(UnitSize == 1 || UnitSize == 2 || UnitSize == 4) && \"Unsupported merge size!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 1963, __extension__
 __PRETTY_FUNCTION__));

for (unsigned i = 0; i != 8/UnitSize; ++i)     // Step over units
  for (unsigned j = 0; j != UnitSize; ++j) {   // Step over bytes within unit
    if (!isConstantOrUndef(N->getMaskElt(i*UnitSize*2+j),
                           LHSStart+j+i*UnitSize) ||
        !isConstantOrUndef(N->getMaskElt(i*UnitSize*2+UnitSize+j),
                           RHSStart+j+i*UnitSize))
      return false;
  }
return true;
1974}

1976/// isVMRGLShuffleMask - Return true if this is a shuffle mask suitable for
1977/// a VMRGL* instruction with the specified unit size (1,2 or 4 bytes).
1978/// The ShuffleKind distinguishes between big-endian merges with two
1979/// different inputs (0), either-endian merges with two identical inputs (1),
1980/// and little-endian merges with two different inputs (2).  For the latter,
1981/// the input operands are swapped (see PPCInstrAltivec.td).
1982bool PPC::isVMRGLShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
                           unsigned ShuffleKind, SelectionDAG &DAG) {
if (DAG.getDataLayout().isLittleEndian()) {
  if (ShuffleKind == 1) // unary
    return isVMerge(N, UnitSize, 0, 0);
  else if (ShuffleKind == 2) // swapped
    return isVMerge(N, UnitSize, 0, 16);
  else
    return false;
} else {
  if (ShuffleKind == 1) // unary
    return isVMerge(N, UnitSize, 8, 8);
  else if (ShuffleKind == 0) // normal
    return isVMerge(N, UnitSize, 8, 24);
  else
    return false;
}
1999}

2001/// isVMRGHShuffleMask - Return true if this is a shuffle mask suitable for
2002/// a VMRGH* instruction with the specified unit size (1,2 or 4 bytes).
2003/// The ShuffleKind distinguishes between big-endian merges with two
2004/// different inputs (0), either-endian merges with two identical inputs (1),
2005/// and little-endian merges with two different inputs (2).  For the latter,
2006/// the input operands are swapped (see PPCInstrAltivec.td).
2007bool PPC::isVMRGHShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
                           unsigned ShuffleKind, SelectionDAG &DAG) {
if (DAG.getDataLayout().isLittleEndian()) {
  if (ShuffleKind == 1) // unary
    return isVMerge(N, UnitSize, 8, 8);
  else if (ShuffleKind == 2) // swapped
    return isVMerge(N, UnitSize, 8, 24);
  else
    return false;
} else {
  if (ShuffleKind == 1) // unary
    return isVMerge(N, UnitSize, 0, 0);
  else if (ShuffleKind == 0) // normal
    return isVMerge(N, UnitSize, 0, 16);
  else
    return false;
}
2024}

2026/**
* Common function used to match vmrgew and vmrgow shuffles
*
* The indexOffset determines whether to look for even or odd words in
* the shuffle mask. This is based on the of the endianness of the target
* machine.
*   - Little Endian:
*     - Use offset of 0 to check for odd elements
*     - Use offset of 4 to check for even elements
*   - Big Endian:
*     - Use offset of 0 to check for even elements
*     - Use offset of 4 to check for odd elements
* A detailed description of the vector element ordering for little endian and
* big endian can be found at
* http://www.ibm.com/developerworks/library/l-ibm-xl-c-cpp-compiler/index.html
* Targeting your applications - what little endian and big endian IBM XL C/C++
* compiler differences mean to you
*
* The mask to the shuffle vector instruction specifies the indices of the
* elements from the two input vectors to place in the result. The elements are
* numbered in array-access order, starting with the first vector. These vectors
* are always of type v16i8, thus each vector will contain 16 elements of size
* 8. More info on the shuffle vector can be found in the
* http://llvm.org/docs/LangRef.html#shufflevector-instruction
* Language Reference.
*
* The RHSStartValue indicates whether the same input vectors are used (unary)
* or two different input vectors are used, based on the following:
*   - If the instruction uses the same vector for both inputs, the range of the
*     indices will be 0 to 15. In this case, the RHSStart value passed should
*     be 0.
*   - If the instruction has two different vectors then the range of the
*     indices will be 0 to 31. In this case, the RHSStart value passed should
*     be 16 (indices 0-15 specify elements in the first vector while indices 16
*     to 31 specify elements in the second vector).
*
* \param[in] N The shuffle vector SD Node to analyze
* \param[in] IndexOffset Specifies whether to look for even or odd elements
* \param[in] RHSStartValue Specifies the starting index for the righthand input
* vector to the shuffle_vector instruction
* \return true iff this shuffle vector represents an even or odd word merge
*/
2068static bool isVMerge(ShuffleVectorSDNode *N, unsigned IndexOffset,
                   unsigned RHSStartValue) {
if (N->getValueType(0) != MVT::v16i8)
  return false;

for (unsigned i = 0; i < 2; ++i)
  for (unsigned j = 0; j < 4; ++j)
    if (!isConstantOrUndef(N->getMaskElt(i*4+j),
                           i*RHSStartValue+j+IndexOffset) ||
        !isConstantOrUndef(N->getMaskElt(i*4+j+8),
                           i*RHSStartValue+j+IndexOffset+8))
      return false;
return true;
2081}

2083/**
* Determine if the specified shuffle mask is suitable for the vmrgew or
* vmrgow instructions.
*
* \param[in] N The shuffle vector SD Node to analyze
* \param[in] CheckEven Check for an even merge (true) or an odd merge (false)
* \param[in] ShuffleKind Identify the type of merge:
*   - 0 = big-endian merge with two different inputs;
*   - 1 = either-endian merge with two identical inputs;
*   - 2 = little-endian merge with two different inputs (inputs are swapped for
*     little-endian merges).
* \param[in] DAG The current SelectionDAG
* \return true iff this shuffle mask
*/
2097bool PPC::isVMRGEOShuffleMask(ShuffleVectorSDNode *N, bool CheckEven,
                            unsigned ShuffleKind, SelectionDAG &DAG) {
if (DAG.getDataLayout().isLittleEndian()) {
  unsigned indexOffset = CheckEven ? 4 : 0;
  if (ShuffleKind == 1) // Unary
    return isVMerge(N, indexOffset, 0);
  else if (ShuffleKind == 2) // swapped
    return isVMerge(N, indexOffset, 16);
  else
    return false;
}
else {
  unsigned indexOffset = CheckEven ? 0 : 4;
  if (ShuffleKind == 1) // Unary
    return isVMerge(N, indexOffset, 0);
  else if (ShuffleKind == 0) // Normal
    return isVMerge(N, indexOffset, 16);
  else
    return false;
}
return false;
2118}

2120/// isVSLDOIShuffleMask - If this is a vsldoi shuffle mask, return the shift
2121/// amount, otherwise return -1.
2122/// The ShuffleKind distinguishes between big-endian operations with two
2123/// different inputs (0), either-endian operations with two identical inputs
2124/// (1), and little-endian operations with two different inputs (2).  For the
2125/// latter, the input operands are swapped (see PPCInstrAltivec.td).
2126int PPC::isVSLDOIShuffleMask(SDNode *N, unsigned ShuffleKind,
                           SelectionDAG &DAG) {
if (N->getValueType(0) != MVT::v16i8)
  return -1;

ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);

// Find the first non-undef value in the shuffle mask.
unsigned i;
for (i = 0; i != 16 && SVOp->getMaskElt(i) < 0; ++i)
  /*search*/;

if (i == 16) return -1;  // all undef.

// Otherwise, check to see if the rest of the elements are consecutively
// numbered from this value.
unsigned ShiftAmt = SVOp->getMaskElt(i);
if (ShiftAmt < i) return -1;

ShiftAmt -= i;
bool isLE = DAG.getDataLayout().isLittleEndian();

if ((ShuffleKind == 0 && !isLE) || (ShuffleKind == 2 && isLE)) {
  // Check the rest of the elements to see if they are consecutive.
  for (++i; i != 16; ++i)
    if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt+i))
      return -1;
} else if (ShuffleKind == 1) {
  // Check the rest of the elements to see if they are consecutive.
  for (++i; i != 16; ++i)
    if (!isConstantOrUndef(SVOp->getMaskElt(i), (ShiftAmt+i) & 15))
      return -1;
} else
  return -1;

if (isLE)
  ShiftAmt = 16 - ShiftAmt;

return ShiftAmt;
2165}

2167/// isSplatShuffleMask - Return true if the specified VECTOR_SHUFFLE operand
2168/// specifies a splat of a single element that is suitable for input to
2169/// one of the splat operations (VSPLTB/VSPLTH/VSPLTW/XXSPLTW/LXVDSX/etc.).
2170bool PPC::isSplatShuffleMask(ShuffleVectorSDNode *N, unsigned EltSize) {
EVT VT = N->getValueType(0);
if (VT == MVT::v2i64 || VT == MVT::v2f64)
  return EltSize == 8 && N->getMaskElt(0) == N->getMaskElt(1);

assert(VT == MVT::v16i8 && isPowerOf2_32(EltSize) &&(static_cast <bool> (VT == MVT::v16i8 && isPowerOf2_32
(EltSize) && EltSize <= 8 && "Can only handle 1,2,4,8 byte element sizes"
) ? void (0) : __assert_fail ("VT == MVT::v16i8 && isPowerOf2_32(EltSize) && EltSize <= 8 && \"Can only handle 1,2,4,8 byte element sizes\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2176, __extension__
 __PRETTY_FUNCTION__))
       EltSize <= 8 && "Can only handle 1,2,4,8 byte element sizes")(static_cast <bool> (VT == MVT::v16i8 && isPowerOf2_32
(EltSize) && EltSize <= 8 && "Can only handle 1,2,4,8 byte element sizes"
) ? void (0) : __assert_fail ("VT == MVT::v16i8 && isPowerOf2_32(EltSize) && EltSize <= 8 && \"Can only handle 1,2,4,8 byte element sizes\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2176, __extension__
 __PRETTY_FUNCTION__));

// The consecutive indices need to specify an element, not part of two
// different elements.  So abandon ship early if this isn't the case.
if (N->getMaskElt(0) % EltSize != 0)
  return false;

// This is a splat operation if each element of the permute is the same, and
// if the value doesn't reference the second vector.
unsigned ElementBase = N->getMaskElt(0);

// FIXME: Handle UNDEF elements too!
if (ElementBase >= 16)
  return false;

// Check that the indices are consecutive, in the case of a multi-byte element
// splatted with a v16i8 mask.
for (unsigned i = 1; i != EltSize; ++i)
  if (N->getMaskElt(i) < 0 || N->getMaskElt(i) != (int)(i+ElementBase))
    return false;

for (unsigned i = EltSize, e = 16; i != e; i += EltSize) {
  if (N->getMaskElt(i) < 0) continue;
  for (unsigned j = 0; j != EltSize; ++j)
    if (N->getMaskElt(i+j) != N->getMaskElt(j))
      return false;
}
return true;
2204}

2206/// Check that the mask is shuffling N byte elements. Within each N byte
2207/// element of the mask, the indices could be either in increasing or
2208/// decreasing order as long as they are consecutive.
2209/// \param[in] N the shuffle vector SD Node to analyze
2210/// \param[in] Width the element width in bytes, could be 2/4/8/16 (HalfWord/
2211/// Word/DoubleWord/QuadWord).
2212/// \param[in] StepLen the delta indices number among the N byte element, if
2213/// the mask is in increasing/decreasing order then it is 1/-1.
2214/// \return true iff the mask is shuffling N byte elements.
2215static bool isNByteElemShuffleMask(ShuffleVectorSDNode *N, unsigned Width,
                                 int StepLen) {
assert((Width == 2 || Width == 4 || Width == 8 || Width == 16) &&(static_cast <bool> ((Width == 2 || Width == 4 || Width
 == 8 || Width == 16) && "Unexpected element width.")
 ? void (0) : __assert_fail ("(Width == 2 || Width == 4 || Width == 8 || Width == 16) && \"Unexpected element width.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2218, __extension__
 __PRETTY_FUNCTION__))
       "Unexpected element width.")(static_cast <bool> ((Width == 2 || Width == 4 || Width
 == 8 || Width == 16) && "Unexpected element width.")
 ? void (0) : __assert_fail ("(Width == 2 || Width == 4 || Width == 8 || Width == 16) && \"Unexpected element width.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2218, __extension__
 __PRETTY_FUNCTION__));
assert((StepLen == 1 || StepLen == -1) && "Unexpected element width.")(static_cast <bool> ((StepLen == 1 || StepLen == -1) &&
 "Unexpected element width.") ? void (0) : __assert_fail ("(StepLen == 1 || StepLen == -1) && \"Unexpected element width.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2219, __extension__
 __PRETTY_FUNCTION__));

unsigned NumOfElem = 16 / Width;
unsigned MaskVal[16]; //  Width is never greater than 16
for (unsigned i = 0; i < NumOfElem; ++i) {
  MaskVal[0] = N->getMaskElt(i * Width);
  if ((StepLen == 1) && (MaskVal[0] % Width)) {
    return false;
  } else if ((StepLen == -1) && ((MaskVal[0] + 1) % Width)) {
    return false;
  }

  for (unsigned int j = 1; j < Width; ++j) {
    MaskVal[j] = N->getMaskElt(i * Width + j);
    if (MaskVal[j] != MaskVal[j-1] + StepLen) {
      return false;
    }
  }
}

return true;
2240}

2242bool PPC::isXXINSERTWMask(ShuffleVectorSDNode *N, unsigned &ShiftElts,
                        unsigned &InsertAtByte, bool &Swap, bool IsLE) {
if (!isNByteElemShuffleMask(N, 4, 1))
  return false;

// Now we look at mask elements 0,4,8,12
unsigned M0 = N->getMaskElt(0) / 4;
unsigned M1 = N->getMaskElt(4) / 4;
unsigned M2 = N->getMaskElt(8) / 4;
unsigned M3 = N->getMaskElt(12) / 4;
unsigned LittleEndianShifts[] = { 2, 1, 0, 3 };
unsigned BigEndianShifts[] = { 3, 0, 1, 2 };

// Below, let H and L be arbitrary elements of the shuffle mask
// where H is in the range [4,7] and L is in the range [0,3].
// H, 1, 2, 3 or L, 5, 6, 7
if ((M0 > 3 && M1 == 1 && M2 == 2 && M3 == 3) ||
    (M0 < 4 && M1 == 5 && M2 == 6 && M3 == 7)) {
  ShiftElts = IsLE ? LittleEndianShifts[M0 & 0x3] : BigEndianShifts[M0 & 0x3];
  InsertAtByte = IsLE ? 12 : 0;
  Swap = M0 < 4;
  return true;
}
// 0, H, 2, 3 or 4, L, 6, 7
if ((M1 > 3 && M0 == 0 && M2 == 2 && M3 == 3) ||
    (M1 < 4 && M0 == 4 && M2 == 6 && M3 == 7)) {
  ShiftElts = IsLE ? LittleEndianShifts[M1 & 0x3] : BigEndianShifts[M1 & 0x3];
  InsertAtByte = IsLE ? 8 : 4;
  Swap = M1 < 4;
  return true;
}
// 0, 1, H, 3 or 4, 5, L, 7
if ((M2 > 3 && M0 == 0 && M1 == 1 && M3 == 3) ||
    (M2 < 4 && M0 == 4 && M1 == 5 && M3 == 7)) {
  ShiftElts = IsLE ? LittleEndianShifts[M2 & 0x3] : BigEndianShifts[M2 & 0x3];
  InsertAtByte = IsLE ? 4 : 8;
  Swap = M2 < 4;
  return true;
}
// 0, 1, 2, H or 4, 5, 6, L
if ((M3 > 3 && M0 == 0 && M1 == 1 && M2 == 2) ||
    (M3 < 4 && M0 == 4 && M1 == 5 && M2 == 6)) {
  ShiftElts = IsLE ? LittleEndianShifts[M3 & 0x3] : BigEndianShifts[M3 & 0x3];
  InsertAtByte = IsLE ? 0 : 12;
  Swap = M3 < 4;
  return true;
}

// If both vector operands for the shuffle are the same vector, the mask will
// contain only elements from the first one and the second one will be undef.
if (N->getOperand(1).isUndef()) {
  ShiftElts = 0;
  Swap = true;
  unsigned XXINSERTWSrcElem = IsLE ? 2 : 1;
  if (M0 == XXINSERTWSrcElem && M1 == 1 && M2 == 2 && M3 == 3) {
    InsertAtByte = IsLE ? 12 : 0;
    return true;
  }
  if (M0 == 0 && M1 == XXINSERTWSrcElem && M2 == 2 && M3 == 3) {
    InsertAtByte = IsLE ? 8 : 4;
    return true;
  }
  if (M0 == 0 && M1 == 1 && M2 == XXINSERTWSrcElem && M3 == 3) {
    InsertAtByte = IsLE ? 4 : 8;
    return true;
  }
  if (M0 == 0 && M1 == 1 && M2 == 2 && M3 == XXINSERTWSrcElem) {
    InsertAtByte = IsLE ? 0 : 12;
    return true;
  }
}

return false;
2315}

2317bool PPC::isXXSLDWIShuffleMask(ShuffleVectorSDNode *N, unsigned &ShiftElts,
                             bool &Swap, bool IsLE) {
assert(N->getValueType(0) == MVT::v16i8 && "Shuffle vector expects v16i8")(static_cast <bool> (N->getValueType(0) == MVT::v16i8
 && "Shuffle vector expects v16i8") ? void (0) : __assert_fail
 ("N->getValueType(0) == MVT::v16i8 && \"Shuffle vector expects v16i8\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2319, __extension__
 __PRETTY_FUNCTION__));
14
←
'?' condition is true→
// Ensure each byte index of the word is consecutive.
if (!isNByteElemShuffleMask(N, 4, 1))
15
←
Assuming the condition is false→
16
←
Taking false branch→
  return false;

// Now we look at mask elements 0,4,8,12, which are the beginning of words.
unsigned M0 = N->getMaskElt(0) / 4;
unsigned M1 = N->getMaskElt(4) / 4;
unsigned M2 = N->getMaskElt(8) / 4;
unsigned M3 = N->getMaskElt(12) / 4;

// If both vector operands for the shuffle are the same vector, the mask will
// contain only elements from the first one and the second one will be undef.
if (N->getOperand(1).isUndef()) {
  assert(M0 < 4 && "Indexing into an undef vector?")(static_cast <bool> (M0 < 4 && "Indexing into an undef vector?"
) ? void (0) : __assert_fail ("M0 < 4 && \"Indexing into an undef vector?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2333, __extension__
 __PRETTY_FUNCTION__));
  if (M1 != (M0 + 1) % 4 || M2 != (M1 + 1) % 4 || M3 != (M2 + 1) % 4)
    return false;

  ShiftElts = IsLE ? (4 - M0) % 4 : M0;
  Swap = false;
  return true;
}

// Ensure each word index of the ShuffleVector Mask is consecutive.
if (M1 != (M0 + 1) % 8 || M2 != (M1 + 1) % 8 || M3 != (M2 + 1) % 8)
17
←
Assuming the condition is false→
18
←
Assuming the condition is false→
19
←
Assuming the condition is false→
20
←
Taking false branch→
  return false;

if (IsLE20.1
'IsLE' is false
) {
  if (M0 == 0 || M0 == 7 || M0 == 6 || M0 == 5) {
    // Input vectors don't need to be swapped if the leading element
    // of the result is one of the 3 left elements of the second vector
    // (or if there is no shift to be done at all).
    Swap = false;
    ShiftElts = (8 - M0) % 8;
  } else if (M0 == 4 || M0 == 3 || M0 == 2 || M0 == 1) {
    // Input vectors need to be swapped if the leading element
    // of the result is one of the 3 left elements of the first vector
    // (or if we're shifting by 4 - thereby simply swapping the vectors).
    Swap = true;
    ShiftElts = (4 - M0) % 4;
  }

  return true;
} else {                                          // BE
  if (M0 == 0 || M0 == 1 || M0 == 2 || M0 == 3) {
21
←
Assuming 'M0' is not equal to 0→
22
←
Assuming 'M0' is not equal to 1→
23
←
Assuming 'M0' is not equal to 2→
24
←
Assuming 'M0' is not equal to 3→
    // Input vectors don't need to be swapped if the leading element
    // of the result is one of the 4 elements of the first vector.
    Swap = false;
    ShiftElts = M0;
  } else if (M0 == 4 || M0 == 5 || M0 == 6 || M0 == 7) {
25
←
Assuming 'M0' is not equal to 4→
26
←
Assuming 'M0' is not equal to 5→
27
←
Assuming 'M0' is not equal to 6→
28
←
Assuming 'M0' is not equal to 7→
29
←
Taking false branch→
    // Input vectors need to be swapped if the leading element
    // of the result is one of the 4 elements of the right vector.
    Swap = true;
    ShiftElts = M0 - 4;
  }

  return true;
30
←
Returning without writing to 'ShiftElts'→
}
2377}

2379bool static isXXBRShuffleMaskHelper(ShuffleVectorSDNode *N, int Width) {
assert(N->getValueType(0) == MVT::v16i8 && "Shuffle vector expects v16i8")(static_cast <bool> (N->getValueType(0) == MVT::v16i8
 && "Shuffle vector expects v16i8") ? void (0) : __assert_fail
 ("N->getValueType(0) == MVT::v16i8 && \"Shuffle vector expects v16i8\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2380, __extension__
 __PRETTY_FUNCTION__));

if (!isNByteElemShuffleMask(N, Width, -1))
  return false;

for (int i = 0; i < 16; i += Width)
  if (N->getMaskElt(i) != i + Width - 1)
    return false;

return true;
2390}

2392bool PPC::isXXBRHShuffleMask(ShuffleVectorSDNode *N) {
return isXXBRShuffleMaskHelper(N, 2);
2394}

2396bool PPC::isXXBRWShuffleMask(ShuffleVectorSDNode *N) {
return isXXBRShuffleMaskHelper(N, 4);
2398}

2400bool PPC::isXXBRDShuffleMask(ShuffleVectorSDNode *N) {
return isXXBRShuffleMaskHelper(N, 8);
2402}

2404bool PPC::isXXBRQShuffleMask(ShuffleVectorSDNode *N) {
return isXXBRShuffleMaskHelper(N, 16);
2406}

2408/// Can node \p N be lowered to an XXPERMDI instruction? If so, set \p Swap
2409/// if the inputs to the instruction should be swapped and set \p DM to the
2410/// value for the immediate.
2411/// Specifically, set \p Swap to true only if \p N can be lowered to XXPERMDI
2412/// AND element 0 of the result comes from the first input (LE) or second input
2413/// (BE). Set \p DM to the calculated result (0-3) only if \p N can be lowered.
2414/// \return true iff the given mask of shuffle node \p N is a XXPERMDI shuffle
2415/// mask.
2416bool PPC::isXXPERMDIShuffleMask(ShuffleVectorSDNode *N, unsigned &DM,
                             bool &Swap, bool IsLE) {
assert(N->getValueType(0) == MVT::v16i8 && "Shuffle vector expects v16i8")(static_cast <bool> (N->getValueType(0) == MVT::v16i8
 && "Shuffle vector expects v16i8") ? void (0) : __assert_fail
 ("N->getValueType(0) == MVT::v16i8 && \"Shuffle vector expects v16i8\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2418, __extension__
 __PRETTY_FUNCTION__));

// Ensure each byte index of the double word is consecutive.
if (!isNByteElemShuffleMask(N, 8, 1))
  return false;

unsigned M0 = N->getMaskElt(0) / 8;
unsigned M1 = N->getMaskElt(8) / 8;
assert(((M0 | M1) < 4) && "A mask element out of bounds?")(static_cast <bool> (((M0 | M1) < 4) && "A mask element out of bounds?"
) ? void (0) : __assert_fail ("((M0 | M1) < 4) && \"A mask element out of bounds?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2426, __extension__
 __PRETTY_FUNCTION__));

// If both vector operands for the shuffle are the same vector, the mask will
// contain only elements from the first one and the second one will be undef.
if (N->getOperand(1).isUndef()) {
  if ((M0 | M1) < 2) {
    DM = IsLE ? (((~M1) & 1) << 1) + ((~M0) & 1) : (M0 << 1) + (M1 & 1);
    Swap = false;
    return true;
  } else
    return false;
}

if (IsLE) {
  if (M0 > 1 && M1 < 2) {
    Swap = false;
  } else if (M0 < 2 && M1 > 1) {
    M0 = (M0 + 2) % 4;
    M1 = (M1 + 2) % 4;
    Swap = true;
  } else
    return false;

  // Note: if control flow comes here that means Swap is already set above
  DM = (((~M1) & 1) << 1) + ((~M0) & 1);
  return true;
} else { // BE
  if (M0 < 2 && M1 > 1) {
    Swap = false;
  } else if (M0 > 1 && M1 < 2) {
    M0 = (M0 + 2) % 4;
    M1 = (M1 + 2) % 4;
    Swap = true;
  } else
    return false;

  // Note: if control flow comes here that means Swap is already set above
  DM = (M0 << 1) + (M1 & 1);
  return true;
}
2466}


2469/// getSplatIdxForPPCMnemonics - Return the splat index as a value that is
2470/// appropriate for PPC mnemonics (which have a big endian bias - namely
2471/// elements are counted from the left of the vector register).
2472unsigned PPC::getSplatIdxForPPCMnemonics(SDNode *N, unsigned EltSize,
                                       SelectionDAG &DAG) {
ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
assert(isSplatShuffleMask(SVOp, EltSize))(static_cast <bool> (isSplatShuffleMask(SVOp, EltSize))
 ? void (0) : __assert_fail ("isSplatShuffleMask(SVOp, EltSize)"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2475, __extension__
 __PRETTY_FUNCTION__));
EVT VT = SVOp->getValueType(0);

if (VT == MVT::v2i64 || VT == MVT::v2f64)
  return DAG.getDataLayout().isLittleEndian() ? 1 - SVOp->getMaskElt(0)
                                              : SVOp->getMaskElt(0);

if (DAG.getDataLayout().isLittleEndian())
  return (16 / EltSize) - 1 - (SVOp->getMaskElt(0) / EltSize);
else
  return SVOp->getMaskElt(0) / EltSize;
2486}

2488/// get_VSPLTI_elt - If this is a build_vector of constants which can be formed
2489/// by using a vspltis[bhw] instruction of the specified element size, return
2490/// the constant being splatted.  The ByteSize field indicates the number of
2491/// bytes of each element [124] -> [bhw].
2492SDValue PPC::get_VSPLTI_elt(SDNode *N, unsigned ByteSize, SelectionDAG &DAG) {
SDValue OpVal;

// If ByteSize of the splat is bigger than the element size of the
// build_vector, then we have a case where we are checking for a splat where
// multiple elements of the buildvector are folded together into a single
// logical element of the splat (e.g. "vsplish 1" to splat {0,1}*8).
unsigned EltSize = 16/N->getNumOperands();
if (EltSize < ByteSize) {
  unsigned Multiple = ByteSize/EltSize;   // Number of BV entries per spltval.
  SDValue UniquedVals[4];
  assert(Multiple > 1 && Multiple <= 4 && "How can this happen?")(static_cast <bool> (Multiple > 1 && Multiple
 <= 4 && "How can this happen?") ? void (0) : __assert_fail
 ("Multiple > 1 && Multiple <= 4 && \"How can this happen?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2503, __extension__
 __PRETTY_FUNCTION__));

  // See if all of the elements in the buildvector agree across.
  for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
    if (N->getOperand(i).isUndef()) continue;
    // If the element isn't a constant, bail fully out.
    if (!isa<ConstantSDNode>(N->getOperand(i))) return SDValue();

    if (!UniquedVals[i&(Multiple-1)].getNode())
      UniquedVals[i&(Multiple-1)] = N->getOperand(i);
    else if (UniquedVals[i&(Multiple-1)] != N->getOperand(i))
      return SDValue();  // no match.
  }

  // Okay, if we reached this point, UniquedVals[0..Multiple-1] contains
  // either constant or undef values that are identical for each chunk.  See
  // if these chunks can form into a larger vspltis*.

  // Check to see if all of the leading entries are either 0 or -1.  If
  // neither, then this won't fit into the immediate field.
  bool LeadingZero = true;
  bool LeadingOnes = true;
  for (unsigned i = 0; i != Multiple-1; ++i) {
    if (!UniquedVals[i].getNode()) continue;  // Must have been undefs.

    LeadingZero &= isNullConstant(UniquedVals[i]);
    LeadingOnes &= isAllOnesConstant(UniquedVals[i]);
  }
  // Finally, check the least significant entry.
  if (LeadingZero) {
    if (!UniquedVals[Multiple-1].getNode())
      return DAG.getTargetConstant(0, SDLoc(N), MVT::i32);  // 0,0,0,undef
    int Val = cast<ConstantSDNode>(UniquedVals[Multiple-1])->getZExtValue();
    if (Val < 16)                                   // 0,0,0,4 -> vspltisw(4)
      return DAG.getTargetConstant(Val, SDLoc(N), MVT::i32);
  }
  if (LeadingOnes) {
    if (!UniquedVals[Multiple-1].getNode())
      return DAG.getTargetConstant(~0U, SDLoc(N), MVT::i32); // -1,-1,-1,undef
    int Val =cast<ConstantSDNode>(UniquedVals[Multiple-1])->getSExtValue();
    if (Val >= -16)                            // -1,-1,-1,-2 -> vspltisw(-2)
      return DAG.getTargetConstant(Val, SDLoc(N), MVT::i32);
  }

  return SDValue();
}

// Check to see if this buildvec has a single non-undef value in its elements.
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
  if (N->getOperand(i).isUndef()) continue;
  if (!OpVal.getNode())
    OpVal = N->getOperand(i);
  else if (OpVal != N->getOperand(i))
    return SDValue();
}

if (!OpVal.getNode()) return SDValue();  // All UNDEF: use implicit def.

unsigned ValSizeInBytes = EltSize;
uint64_t Value = 0;
if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal)) {
  Value = CN->getZExtValue();
} else if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(OpVal)) {
  assert(CN->getValueType(0) == MVT::f32 && "Only one legal FP vector type!")(static_cast <bool> (CN->getValueType(0) == MVT::f32
 && "Only one legal FP vector type!") ? void (0) : __assert_fail
 ("CN->getValueType(0) == MVT::f32 && \"Only one legal FP vector type!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2566, __extension__
 __PRETTY_FUNCTION__));
  Value = llvm::bit_cast<uint32_t>(CN->getValueAPF().convertToFloat());
}

// If the splat value is larger than the element value, then we can never do
// this splat.  The only case that we could fit the replicated bits into our
// immediate field for would be zero, and we prefer to use vxor for it.
if (ValSizeInBytes < ByteSize) return SDValue();

// If the element value is larger than the splat value, check if it consists
// of a repeated bit pattern of size ByteSize.
if (!APInt(ValSizeInBytes * 8, Value).isSplat(ByteSize * 8))
  return SDValue();

// Properly sign extend the value.
int MaskVal = SignExtend32(Value, ByteSize * 8);

// If this is zero, don't match, zero matches ISD::isBuildVectorAllZeros.
if (MaskVal == 0) return SDValue();

// Finally, if this value fits in a 5 bit sext field, return it
if (SignExtend32<5>(MaskVal) == MaskVal)
  return DAG.getTargetConstant(MaskVal, SDLoc(N), MVT::i32);
return SDValue();
2590}

2592//===----------------------------------------------------------------------===//
2593//  Addressing Mode Selection
2594//===----------------------------------------------------------------------===//

2596/// isIntS16Immediate - This method tests to see if the node is either a 32-bit
2597/// or 64-bit immediate, and if the value can be accurately represented as a
2598/// sign extension from a 16-bit value.  If so, this returns true and the
2599/// immediate.
2600bool llvm::isIntS16Immediate(SDNode *N, int16_t &Imm) {
if (!isa<ConstantSDNode>(N))
  return false;

Imm = (int16_t)cast<ConstantSDNode>(N)->getZExtValue();
if (N->getValueType(0) == MVT::i32)
  return Imm == (int32_t)cast<ConstantSDNode>(N)->getZExtValue();
else
  return Imm == (int64_t)cast<ConstantSDNode>(N)->getZExtValue();
2609}
2610bool llvm::isIntS16Immediate(SDValue Op, int16_t &Imm) {
return isIntS16Immediate(Op.getNode(), Imm);
2612}

2614/// Used when computing address flags for selecting loads and stores.
2615/// If we have an OR, check if the LHS and RHS are provably disjoint.
2616/// An OR of two provably disjoint values is equivalent to an ADD.
2617/// Most PPC load/store instructions compute the effective address as a sum,
2618/// so doing this conversion is useful.
2619static bool provablyDisjointOr(SelectionDAG &DAG, const SDValue &N) {
if (N.getOpcode() != ISD::OR)
  return false;
KnownBits LHSKnown = DAG.computeKnownBits(N.getOperand(0));
if (!LHSKnown.Zero.getBoolValue())
  return false;
KnownBits RHSKnown = DAG.computeKnownBits(N.getOperand(1));
return (~(LHSKnown.Zero | RHSKnown.Zero) == 0);
2627}

2629/// SelectAddressEVXRegReg - Given the specified address, check to see if it can
2630/// be represented as an indexed [r+r] operation.
2631bool PPCTargetLowering::SelectAddressEVXRegReg(SDValue N, SDValue &Base,
                                             SDValue &Index,
                                             SelectionDAG &DAG) const {
for (SDNode *U : N->uses()) {
  if (MemSDNode *Memop = dyn_cast<MemSDNode>(U)) {
    if (Memop->getMemoryVT() == MVT::f64) {
        Base = N.getOperand(0);
        Index = N.getOperand(1);
        return true;
    }
  }
}
return false;
2644}

2646/// isIntS34Immediate - This method tests if value of node given can be
2647/// accurately represented as a sign extension from a 34-bit value.  If so,
2648/// this returns true and the immediate.
2649bool llvm::isIntS34Immediate(SDNode *N, int64_t &Imm) {
if (!isa<ConstantSDNode>(N))
  return false;

Imm = (int64_t)cast<ConstantSDNode>(N)->getZExtValue();
return isInt<34>(Imm);
2655}
2656bool llvm::isIntS34Immediate(SDValue Op, int64_t &Imm) {
return isIntS34Immediate(Op.getNode(), Imm);
2658}

2660/// SelectAddressRegReg - Given the specified addressed, check to see if it
2661/// can be represented as an indexed [r+r] operation.  Returns false if it
2662/// can be more efficiently represented as [r+imm]. If \p EncodingAlignment is
2663/// non-zero and N can be represented by a base register plus a signed 16-bit
2664/// displacement, make a more precise judgement by checking (displacement % \p
2665/// EncodingAlignment).
2666bool PPCTargetLowering::SelectAddressRegReg(
  SDValue N, SDValue &Base, SDValue &Index, SelectionDAG &DAG,
  MaybeAlign EncodingAlignment) const {
// If we have a PC Relative target flag don't select as [reg+reg]. It will be
// a [pc+imm].
if (SelectAddressPCRel(N, Base))
  return false;

int16_t Imm = 0;
if (N.getOpcode() == ISD::ADD) {
  // Is there any SPE load/store (f64), which can't handle 16bit offset?
  // SPE load/store can only handle 8-bit offsets.
  if (hasSPE() && SelectAddressEVXRegReg(N, Base, Index, DAG))
      return true;
  if (isIntS16Immediate(N.getOperand(1), Imm) &&
      (!EncodingAlignment || isAligned(*EncodingAlignment, Imm)))
    return false; // r+i
  if (N.getOperand(1).getOpcode() == PPCISD::Lo)
    return false;    // r+i

  Base = N.getOperand(0);
  Index = N.getOperand(1);
  return true;
} else if (N.getOpcode() == ISD::OR) {
  if (isIntS16Immediate(N.getOperand(1), Imm) &&
      (!EncodingAlignment || isAligned(*EncodingAlignment, Imm)))
    return false; // r+i can fold it if we can.

  // If this is an or of disjoint bitfields, we can codegen this as an add
  // (for better address arithmetic) if the LHS and RHS of the OR are provably
  // disjoint.
  KnownBits LHSKnown = DAG.computeKnownBits(N.getOperand(0));

  if (LHSKnown.Zero.getBoolValue()) {
    KnownBits RHSKnown = DAG.computeKnownBits(N.getOperand(1));
    // If all of the bits are known zero on the LHS or RHS, the add won't
    // carry.
    if (~(LHSKnown.Zero | RHSKnown.Zero) == 0) {
      Base = N.getOperand(0);
      Index = N.getOperand(1);
      return true;
    }
  }
}

return false;
2712}

2714// If we happen to be doing an i64 load or store into a stack slot that has
2715// less than a 4-byte alignment, then the frame-index elimination may need to
2716// use an indexed load or store instruction (because the offset may not be a
2717// multiple of 4). The extra register needed to hold the offset comes from the
2718// register scavenger, and it is possible that the scavenger will need to use
2719// an emergency spill slot. As a result, we need to make sure that a spill slot
2720// is allocated when doing an i64 load/store into a less-than-4-byte-aligned
2721// stack slot.
2722static void fixupFuncForFI(SelectionDAG &DAG, int FrameIdx, EVT VT) {
// FIXME: This does not handle the LWA case.
if (VT != MVT::i64)
  return;

// NOTE: We'll exclude negative FIs here, which come from argument
// lowering, because there are no known test cases triggering this problem
// using packed structures (or similar). We can remove this exclusion if
// we find such a test case. The reason why this is so test-case driven is
// because this entire 'fixup' is only to prevent crashes (from the
// register scavenger) on not-really-valid inputs. For example, if we have:
//   %a = alloca i1
//   %b = bitcast i1* %a to i64*
//   store i64* a, i64 b
// then the store should really be marked as 'align 1', but is not. If it
// were marked as 'align 1' then the indexed form would have been
// instruction-selected initially, and the problem this 'fixup' is preventing
// won't happen regardless.
if (FrameIdx < 0)
  return;

MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo &MFI = MF.getFrameInfo();

if (MFI.getObjectAlign(FrameIdx) >= Align(4))
  return;

PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
FuncInfo->setHasNonRISpills();
2751}

2753/// Returns true if the address N can be represented by a base register plus
2754/// a signed 16-bit displacement [r+imm], and if it is not better
2755/// represented as reg+reg.  If \p EncodingAlignment is non-zero, only accept
2756/// displacements that are multiples of that value.
2757bool PPCTargetLowering::SelectAddressRegImm(
  SDValue N, SDValue &Disp, SDValue &Base, SelectionDAG &DAG,
  MaybeAlign EncodingAlignment) const {
// FIXME dl should come from parent load or store, not from address
SDLoc dl(N);

// If we have a PC Relative target flag don't select as [reg+imm]. It will be
// a [pc+imm].
if (SelectAddressPCRel(N, Base))
  return false;

// If this can be more profitably realized as r+r, fail.
if (SelectAddressRegReg(N, Disp, Base, DAG, EncodingAlignment))
  return false;

if (N.getOpcode() == ISD::ADD) {
  int16_t imm = 0;
  if (isIntS16Immediate(N.getOperand(1), imm) &&
      (!EncodingAlignment || isAligned(*EncodingAlignment, imm))) {
    Disp = DAG.getTargetConstant(imm, dl, N.getValueType());
    if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
      Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
      fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
    } else {
      Base = N.getOperand(0);
    }
    return true; // [r+i]
  } else if (N.getOperand(1).getOpcode() == PPCISD::Lo) {
    // Match LOAD (ADD (X, Lo(G))).
    assert(!cast<ConstantSDNode>(N.getOperand(1).getOperand(1))->getZExtValue()(static_cast <bool> (!cast<ConstantSDNode>(N.getOperand
(1).getOperand(1))->getZExtValue() && "Cannot handle constant offsets yet!"
) ? void (0) : __assert_fail ("!cast<ConstantSDNode>(N.getOperand(1).getOperand(1))->getZExtValue() && \"Cannot handle constant offsets yet!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2787, __extension__
 __PRETTY_FUNCTION__))
           && "Cannot handle constant offsets yet!")(static_cast <bool> (!cast<ConstantSDNode>(N.getOperand
(1).getOperand(1))->getZExtValue() && "Cannot handle constant offsets yet!"
) ? void (0) : __assert_fail ("!cast<ConstantSDNode>(N.getOperand(1).getOperand(1))->getZExtValue() && \"Cannot handle constant offsets yet!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2787, __extension__
 __PRETTY_FUNCTION__));
    Disp = N.getOperand(1).getOperand(0);  // The global address.
    assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||(static_cast <bool> (Disp.getOpcode() == ISD::TargetGlobalAddress
 || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode
() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable
) ? void (0) : __assert_fail ("Disp.getOpcode() == ISD::TargetGlobalAddress || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2792, __extension__
 __PRETTY_FUNCTION__))
           Disp.getOpcode() == ISD::TargetGlobalTLSAddress ||(static_cast <bool> (Disp.getOpcode() == ISD::TargetGlobalAddress
 || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode
() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable
) ? void (0) : __assert_fail ("Disp.getOpcode() == ISD::TargetGlobalAddress || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2792, __extension__
 __PRETTY_FUNCTION__))
           Disp.getOpcode() == ISD::TargetConstantPool ||(static_cast <bool> (Disp.getOpcode() == ISD::TargetGlobalAddress
 || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode
() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable
) ? void (0) : __assert_fail ("Disp.getOpcode() == ISD::TargetGlobalAddress || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2792, __extension__
 __PRETTY_FUNCTION__))
           Disp.getOpcode() == ISD::TargetJumpTable)(static_cast <bool> (Disp.getOpcode() == ISD::TargetGlobalAddress
 || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode
() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable
) ? void (0) : __assert_fail ("Disp.getOpcode() == ISD::TargetGlobalAddress || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 2792, __extension__
 __PRETTY_FUNCTION__));
    Base = N.getOperand(0);
    return true;  // [&g+r]
  }
} else if (N.getOpcode() == ISD::OR) {
  int16_t imm = 0;
  if (isIntS16Immediate(N.getOperand(1), imm) &&
      (!EncodingAlignment || isAligned(*EncodingAlignment, imm))) {
    // If this is an or of disjoint bitfields, we can codegen this as an add
    // (for better address arithmetic) if the LHS and RHS of the OR are
    // provably disjoint.
    KnownBits LHSKnown = DAG.computeKnownBits(N.getOperand(0));

    if ((LHSKnown.Zero.getZExtValue()|~(uint64_t)imm) == ~0ULL) {
      // If all of the bits are known zero on the LHS or RHS, the add won't
      // carry.
      if (FrameIndexSDNode *FI =
            dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
        Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
        fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
      } else {
        Base = N.getOperand(0);
      }
      Disp = DAG.getTargetConstant(imm, dl, N.getValueType());
      return true;
    }
  }
} else if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
  // Loading from a constant address.

  // If this address fits entirely in a 16-bit sext immediate field, codegen
  // this as "d, 0"
  int16_t Imm;
  if (isIntS16Immediate(CN, Imm) &&
      (!EncodingAlignment || isAligned(*EncodingAlignment, Imm))) {
    Disp = DAG.getTargetConstant(Imm, dl, CN->getValueType(0));
    Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
                           CN->getValueType(0));
    return true;
  }

  // Handle 32-bit sext immediates with LIS + addr mode.
  if ((CN->getValueType(0) == MVT::i32 ||
       (int64_t)CN->getZExtValue() == (int)CN->getZExtValue()) &&
      (!EncodingAlignment ||
       isAligned(*EncodingAlignment, CN->getZExtValue()))) {
    int Addr = (int)CN->getZExtValue();

    // Otherwise, break this down into an LIS + disp.
    Disp = DAG.getTargetConstant((short)Addr, dl, MVT::i32);

    Base = DAG.getTargetConstant((Addr - (signed short)Addr) >> 16, dl,
                                 MVT::i32);
    unsigned Opc = CN->getValueType(0) == MVT::i32 ? PPC::LIS : PPC::LIS8;
    Base = SDValue(DAG.getMachineNode(Opc, dl, CN->getValueType(0), Base), 0);
    return true;
  }
}

Disp = DAG.getTargetConstant(0, dl, getPointerTy(DAG.getDataLayout()));
if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N)) {
  Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
  fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
} else
  Base = N;
return true;      // [r+0]
2858}

2860/// Similar to the 16-bit case but for instructions that take a 34-bit
2861/// displacement field (prefixed loads/stores).
2862bool PPCTargetLowering::SelectAddressRegImm34(SDValue N, SDValue &Disp,
                                            SDValue &Base,
                                            SelectionDAG &DAG) const {
// Only on 64-bit targets.
if (N.getValueType() != MVT::i64)
  return false;

SDLoc dl(N);
int64_t Imm = 0;

if (N.getOpcode() == ISD::ADD) {
  if (!isIntS34Immediate(N.getOperand(1), Imm))
    return false;
  Disp = DAG.getTargetConstant(Imm, dl, N.getValueType());
  if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0)))
    Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
  else
    Base = N.getOperand(0);
  return true;
}

if (N.getOpcode() == ISD::OR) {
  if (!isIntS34Immediate(N.getOperand(1), Imm))
    return false;
  // If this is an or of disjoint bitfields, we can codegen this as an add
  // (for better address arithmetic) if the LHS and RHS of the OR are
  // provably disjoint.
  KnownBits LHSKnown = DAG.computeKnownBits(N.getOperand(0));
  if ((LHSKnown.Zero.getZExtValue() | ~(uint64_t)Imm) != ~0ULL)
    return false;
  if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0)))
    Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
  else
    Base = N.getOperand(0);
  Disp = DAG.getTargetConstant(Imm, dl, N.getValueType());
  return true;
}

if (isIntS34Immediate(N, Imm)) { // If the address is a 34-bit const.
  Disp = DAG.getTargetConstant(Imm, dl, N.getValueType());
  Base = DAG.getRegister(PPC::ZERO8, N.getValueType());
  return true;
}

return false;
2907}

2909/// SelectAddressRegRegOnly - Given the specified addressed, force it to be
2910/// represented as an indexed [r+r] operation.
2911bool PPCTargetLowering::SelectAddressRegRegOnly(SDValue N, SDValue &Base,
                                              SDValue &Index,
                                              SelectionDAG &DAG) const {
// Check to see if we can easily represent this as an [r+r] address.  This
// will fail if it thinks that the address is more profitably represented as
// reg+imm, e.g. where imm = 0.
if (SelectAddressRegReg(N, Base, Index, DAG))
  return true;

// If the address is the result of an add, we will utilize the fact that the
// address calculation includes an implicit add.  However, we can reduce
// register pressure if we do not materialize a constant just for use as the
// index register.  We only get rid of the add if it is not an add of a
// value and a 16-bit signed constant and both have a single use.
int16_t imm = 0;
if (N.getOpcode() == ISD::ADD &&
    (!isIntS16Immediate(N.getOperand(1), imm) ||
     !N.getOperand(1).hasOneUse() || !N.getOperand(0).hasOneUse())) {
  Base = N.getOperand(0);
  Index = N.getOperand(1);
  return true;
}

// Otherwise, do it the hard way, using R0 as the base register.
Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
                       N.getValueType());
Index = N;
return true;
2939}

2941template <typename Ty> static bool isValidPCRelNode(SDValue N) {
Ty *PCRelCand = dyn_cast<Ty>(N);
return PCRelCand && (PCRelCand->getTargetFlags() & PPCII::MO_PCREL_FLAG);
2944}

2946/// Returns true if this address is a PC Relative address.
2947/// PC Relative addresses are marked with the flag PPCII::MO_PCREL_FLAG
2948/// or if the node opcode is PPCISD::MAT_PCREL_ADDR.
2949bool PPCTargetLowering::SelectAddressPCRel(SDValue N, SDValue &Base) const {
// This is a materialize PC Relative node. Always select this as PC Relative.
Base = N;
if (N.getOpcode() == PPCISD::MAT_PCREL_ADDR)
  return true;
if (isValidPCRelNode<ConstantPoolSDNode>(N) ||
    isValidPCRelNode<GlobalAddressSDNode>(N) ||
    isValidPCRelNode<JumpTableSDNode>(N) ||
    isValidPCRelNode<BlockAddressSDNode>(N))
  return true;
return false;
2960}

2962/// Returns true if we should use a direct load into vector instruction
2963/// (such as lxsd or lfd), instead of a load into gpr + direct move sequence.
2964static bool usePartialVectorLoads(SDNode *N, const PPCSubtarget& ST) {

// If there are any other uses other than scalar to vector, then we should
// keep it as a scalar load -> direct move pattern to prevent multiple
// loads.
LoadSDNode *LD = dyn_cast<LoadSDNode>(N);
if (!LD)
  return false;

EVT MemVT = LD->getMemoryVT();
if (!MemVT.isSimple())
  return false;
switch(MemVT.getSimpleVT().SimpleTy) {
case MVT::i64:
  break;
case MVT::i32:
  if (!ST.hasP8Vector())
    return false;
  break;
case MVT::i16:
case MVT::i8:
  if (!ST.hasP9Vector())
    return false;
  break;
default:
  return false;
}

SDValue LoadedVal(N, 0);
if (!LoadedVal.hasOneUse())
  return false;

for (SDNode::use_iterator UI = LD->use_begin(), UE = LD->use_end();
     UI != UE; ++UI)
  if (UI.getUse().get().getResNo() == 0 &&
      UI->getOpcode() != ISD::SCALAR_TO_VECTOR &&
      UI->getOpcode() != PPCISD::SCALAR_TO_VECTOR_PERMUTED)
    return false;

return true;
3004}

3006/// getPreIndexedAddressParts - returns true by value, base pointer and
3007/// offset pointer and addressing mode by reference if the node's address
3008/// can be legally represented as pre-indexed load / store address.
3009bool PPCTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
                                                SDValue &Offset,
                                                ISD::MemIndexedMode &AM,
                                                SelectionDAG &DAG) const {
if (DisablePPCPreinc) return false;

bool isLoad = true;
SDValue Ptr;
EVT VT;
Align Alignment;
if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
  Ptr = LD->getBasePtr();
  VT = LD->getMemoryVT();
  Alignment = LD->getAlign();
} else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
  Ptr = ST->getBasePtr();
  VT  = ST->getMemoryVT();
  Alignment = ST->getAlign();
  isLoad = false;
} else
  return false;

// Do not generate pre-inc forms for specific loads that feed scalar_to_vector
// instructions because we can fold these into a more efficient instruction
// instead, (such as LXSD).
if (isLoad && usePartialVectorLoads(N, Subtarget)) {
  return false;
}

// PowerPC doesn't have preinc load/store instructions for vectors
if (VT.isVector())
  return false;

if (SelectAddressRegReg(Ptr, Base, Offset, DAG)) {
  // Common code will reject creating a pre-inc form if the base pointer
  // is a frame index, or if N is a store and the base pointer is either
  // the same as or a predecessor of the value being stored.  Check for
  // those situations here, and try with swapped Base/Offset instead.
  bool Swap = false;

  if (isa<FrameIndexSDNode>(Base) || isa<RegisterSDNode>(Base))
    Swap = true;
  else if (!isLoad) {
    SDValue Val = cast<StoreSDNode>(N)->getValue();
    if (Val == Base || Base.getNode()->isPredecessorOf(Val.getNode()))
      Swap = true;
  }

  if (Swap)
    std::swap(Base, Offset);

  AM = ISD::PRE_INC;
  return true;
}

// LDU/STU can only handle immediates that are a multiple of 4.
if (VT != MVT::i64) {
  if (!SelectAddressRegImm(Ptr, Offset, Base, DAG, std::nullopt))
    return false;
} else {
  // LDU/STU need an address with at least 4-byte alignment.
  if (Alignment < Align(4))
    return false;

  if (!SelectAddressRegImm(Ptr, Offset, Base, DAG, Align(4)))
    return false;
}

if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
  // PPC64 doesn't have lwau, but it does have lwaux.  Reject preinc load of
  // sext i32 to i64 when addr mode is r+i.
  if (LD->getValueType(0) == MVT::i64 && LD->getMemoryVT() == MVT::i32 &&
      LD->getExtensionType() == ISD::SEXTLOAD &&
      isa<ConstantSDNode>(Offset))
    return false;
}

AM = ISD::PRE_INC;
return true;
3088}

3090//===----------------------------------------------------------------------===//
3091//  LowerOperation implementation
3092//===----------------------------------------------------------------------===//

3094/// Return true if we should reference labels using a PICBase, set the HiOpFlags
3095/// and LoOpFlags to the target MO flags.
3096static void getLabelAccessInfo(bool IsPIC, const PPCSubtarget &Subtarget,
                             unsigned &HiOpFlags, unsigned &LoOpFlags,
                             const GlobalValue *GV = nullptr) {
HiOpFlags = PPCII::MO_HA;
LoOpFlags = PPCII::MO_LO;

// Don't use the pic base if not in PIC relocation model.
if (IsPIC) {
  HiOpFlags |= PPCII::MO_PIC_FLAG;
  LoOpFlags |= PPCII::MO_PIC_FLAG;
}
3107}

3109static SDValue LowerLabelRef(SDValue HiPart, SDValue LoPart, bool isPIC,
                           SelectionDAG &DAG) {
SDLoc DL(HiPart);
EVT PtrVT = HiPart.getValueType();
SDValue Zero = DAG.getConstant(0, DL, PtrVT);

SDValue Hi = DAG.getNode(PPCISD::Hi, DL, PtrVT, HiPart, Zero);
SDValue Lo = DAG.getNode(PPCISD::Lo, DL, PtrVT, LoPart, Zero);

// With PIC, the first instruction is actually "GR+hi(&G)".
if (isPIC)
  Hi = DAG.getNode(ISD::ADD, DL, PtrVT,
                   DAG.getNode(PPCISD::GlobalBaseReg, DL, PtrVT), Hi);

// Generate non-pic code that has direct accesses to the constant pool.
// The address of the global is just (hi(&g)+lo(&g)).
return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
3126}

3128static void setUsesTOCBasePtr(MachineFunction &MF) {
PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
FuncInfo->setUsesTOCBasePtr();
3131}

3133static void setUsesTOCBasePtr(SelectionDAG &DAG) {
setUsesTOCBasePtr(DAG.getMachineFunction());
3135}

3137SDValue PPCTargetLowering::getTOCEntry(SelectionDAG &DAG, const SDLoc &dl,
                                     SDValue GA) const {
const bool Is64Bit = Subtarget.isPPC64();
EVT VT = Is64Bit ? MVT::i64 : MVT::i32;
SDValue Reg = Is64Bit ? DAG.getRegister(PPC::X2, VT)
                      : Subtarget.isAIXABI()
                            ? DAG.getRegister(PPC::R2, VT)
                            : DAG.getNode(PPCISD::GlobalBaseReg, dl, VT);
SDValue Ops[] = { GA, Reg };
return DAG.getMemIntrinsicNode(
    PPCISD::TOC_ENTRY, dl, DAG.getVTList(VT, MVT::Other), Ops, VT,
    MachinePointerInfo::getGOT(DAG.getMachineFunction()), std::nullopt,
    MachineMemOperand::MOLoad);
3150}

3152SDValue PPCTargetLowering::LowerConstantPool(SDValue Op,
                                           SelectionDAG &DAG) const {
EVT PtrVT = Op.getValueType();
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
const Constant *C = CP->getConstVal();

// 64-bit SVR4 ABI and AIX ABI code are always position-independent.
// The actual address of the GlobalValue is stored in the TOC.
if (Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) {
  if (Subtarget.isUsingPCRelativeCalls()) {
    SDLoc DL(CP);
    EVT Ty = getPointerTy(DAG.getDataLayout());
    SDValue ConstPool = DAG.getTargetConstantPool(
        C, Ty, CP->getAlign(), CP->getOffset(), PPCII::MO_PCREL_FLAG);
    return DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, ConstPool);
  }
  setUsesTOCBasePtr(DAG);
  SDValue GA = DAG.getTargetConstantPool(C, PtrVT, CP->getAlign(), 0);
  return getTOCEntry(DAG, SDLoc(CP), GA);
}

unsigned MOHiFlag, MOLoFlag;
bool IsPIC = isPositionIndependent();
getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag);

if (IsPIC && Subtarget.isSVR4ABI()) {
  SDValue GA =
      DAG.getTargetConstantPool(C, PtrVT, CP->getAlign(), PPCII::MO_PIC_FLAG);
  return getTOCEntry(DAG, SDLoc(CP), GA);
}

SDValue CPIHi =
    DAG.getTargetConstantPool(C, PtrVT, CP->getAlign(), 0, MOHiFlag);
SDValue CPILo =
    DAG.getTargetConstantPool(C, PtrVT, CP->getAlign(), 0, MOLoFlag);
return LowerLabelRef(CPIHi, CPILo, IsPIC, DAG);
3188}

3190// For 64-bit PowerPC, prefer the more compact relative encodings.
3191// This trades 32 bits per jump table entry for one or two instructions
3192// on the jump site.
3193unsigned PPCTargetLowering::getJumpTableEncoding() const {
if (isJumpTableRelative())
  return MachineJumpTableInfo::EK_LabelDifference32;

return TargetLowering::getJumpTableEncoding();
3198}

3200bool PPCTargetLowering::isJumpTableRelative() const {
if (UseAbsoluteJumpTables)
  return false;
if (Subtarget.isPPC64() || Subtarget.isAIXABI())
  return true;
return TargetLowering::isJumpTableRelative();
3206}

3208SDValue PPCTargetLowering::getPICJumpTableRelocBase(SDValue Table,
                                                  SelectionDAG &DAG) const {
if (!Subtarget.isPPC64() || Subtarget.isAIXABI())
  return TargetLowering::getPICJumpTableRelocBase(Table, DAG);

switch (getTargetMachine().getCodeModel()) {
case CodeModel::Small:
case CodeModel::Medium:
  return TargetLowering::getPICJumpTableRelocBase(Table, DAG);
default:
  return DAG.getNode(PPCISD::GlobalBaseReg, SDLoc(),
                     getPointerTy(DAG.getDataLayout()));
}
3221}

3223const MCExpr *
3224PPCTargetLowering::getPICJumpTableRelocBaseExpr(const MachineFunction *MF,
                                              unsigned JTI,
                                              MCContext &Ctx) const {
if (!Subtarget.isPPC64() || Subtarget.isAIXABI())
  return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);

switch (getTargetMachine().getCodeModel()) {
case CodeModel::Small:
case CodeModel::Medium:
  return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
default:
  return MCSymbolRefExpr::create(MF->getPICBaseSymbol(), Ctx);
}
3237}

3239SDValue PPCTargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
EVT PtrVT = Op.getValueType();
JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);

// isUsingPCRelativeCalls() returns true when PCRelative is enabled
if (Subtarget.isUsingPCRelativeCalls()) {
  SDLoc DL(JT);
  EVT Ty = getPointerTy(DAG.getDataLayout());
  SDValue GA =
      DAG.getTargetJumpTable(JT->getIndex(), Ty, PPCII::MO_PCREL_FLAG);
  SDValue MatAddr = DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, GA);
  return MatAddr;
}

// 64-bit SVR4 ABI and AIX ABI code are always position-independent.
// The actual address of the GlobalValue is stored in the TOC.
if (Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) {
  setUsesTOCBasePtr(DAG);
  SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
  return getTOCEntry(DAG, SDLoc(JT), GA);
}

unsigned MOHiFlag, MOLoFlag;
bool IsPIC = isPositionIndependent();
getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag);

if (IsPIC && Subtarget.isSVR4ABI()) {
  SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT,
                                      PPCII::MO_PIC_FLAG);
  return getTOCEntry(DAG, SDLoc(GA), GA);
}

SDValue JTIHi = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOHiFlag);
SDValue JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOLoFlag);
return LowerLabelRef(JTIHi, JTILo, IsPIC, DAG);
3274}

3276SDValue PPCTargetLowering::LowerBlockAddress(SDValue Op,
                                           SelectionDAG &DAG) const {
EVT PtrVT = Op.getValueType();
BlockAddressSDNode *BASDN = cast<BlockAddressSDNode>(Op);
const BlockAddress *BA = BASDN->getBlockAddress();

// isUsingPCRelativeCalls() returns true when PCRelative is enabled
if (Subtarget.isUsingPCRelativeCalls()) {
  SDLoc DL(BASDN);
  EVT Ty = getPointerTy(DAG.getDataLayout());
  SDValue GA = DAG.getTargetBlockAddress(BA, Ty, BASDN->getOffset(),
                                         PPCII::MO_PCREL_FLAG);
  SDValue MatAddr = DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, GA);
  return MatAddr;
}

// 64-bit SVR4 ABI and AIX ABI code are always position-independent.
// The actual BlockAddress is stored in the TOC.
if (Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) {
  setUsesTOCBasePtr(DAG);
  SDValue GA = DAG.getTargetBlockAddress(BA, PtrVT, BASDN->getOffset());
  return getTOCEntry(DAG, SDLoc(BASDN), GA);
}

// 32-bit position-independent ELF stores the BlockAddress in the .got.
if (Subtarget.is32BitELFABI() && isPositionIndependent())
  return getTOCEntry(
      DAG, SDLoc(BASDN),
      DAG.getTargetBlockAddress(BA, PtrVT, BASDN->getOffset()));

unsigned MOHiFlag, MOLoFlag;
bool IsPIC = isPositionIndependent();
getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag);
SDValue TgtBAHi = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOHiFlag);
SDValue TgtBALo = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOLoFlag);
return LowerLabelRef(TgtBAHi, TgtBALo, IsPIC, DAG);
3312}

3314SDValue PPCTargetLowering::LowerGlobalTLSAddress(SDValue Op,
                                            SelectionDAG &DAG) const {
if (Subtarget.isAIXABI())
  return LowerGlobalTLSAddressAIX(Op, DAG);

return LowerGlobalTLSAddressLinux(Op, DAG);
3320}

3322SDValue PPCTargetLowering::LowerGlobalTLSAddressAIX(SDValue Op,
                                                  SelectionDAG &DAG) const {
GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);

if (DAG.getTarget().useEmulatedTLS())
  report_fatal_error("Emulated TLS is not yet supported on AIX");

SDLoc dl(GA);
const GlobalValue *GV = GA->getGlobal();
EVT PtrVT = getPointerTy(DAG.getDataLayout());

// The general-dynamic model is the only access model supported for now, so
// all the GlobalTLSAddress nodes are lowered with this model.
// We need to generate two TOC entries, one for the variable offset, one for
// the region handle. The global address for the TOC entry of the region
// handle is created with the MO_TLSGDM_FLAG flag and the global address
// for the TOC entry of the variable offset is created with MO_TLSGD_FLAG.
SDValue VariableOffsetTGA =
    DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, PPCII::MO_TLSGD_FLAG);
SDValue RegionHandleTGA =
    DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, PPCII::MO_TLSGDM_FLAG);
SDValue VariableOffset = getTOCEntry(DAG, dl, VariableOffsetTGA);
SDValue RegionHandle = getTOCEntry(DAG, dl, RegionHandleTGA);
return DAG.getNode(PPCISD::TLSGD_AIX, dl, PtrVT, VariableOffset,
                   RegionHandle);
3347}

3349SDValue PPCTargetLowering::LowerGlobalTLSAddressLinux(SDValue Op,
                                                    SelectionDAG &DAG) const {
// FIXME: TLS addresses currently use medium model code sequences,
// which is the most useful form.  Eventually support for small and
// large models could be added if users need it, at the cost of
// additional complexity.
GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
if (DAG.getTarget().useEmulatedTLS())
  return LowerToTLSEmulatedModel(GA, DAG);

SDLoc dl(GA);
const GlobalValue *GV = GA->getGlobal();
EVT PtrVT = getPointerTy(DAG.getDataLayout());
bool is64bit = Subtarget.isPPC64();
const Module *M = DAG.getMachineFunction().getFunction().getParent();
PICLevel::Level picLevel = M->getPICLevel();

const TargetMachine &TM = getTargetMachine();
TLSModel::Model Model = TM.getTLSModel(GV);

if (Model == TLSModel::LocalExec) {
  if (Subtarget.isUsingPCRelativeCalls()) {
    SDValue TLSReg = DAG.getRegister(PPC::X13, MVT::i64);
    SDValue TGA = DAG.getTargetGlobalAddress(
        GV, dl, PtrVT, 0, (PPCII::MO_PCREL_FLAG | PPCII::MO_TPREL_FLAG));
    SDValue MatAddr =
        DAG.getNode(PPCISD::TLS_LOCAL_EXEC_MAT_ADDR, dl, PtrVT, TGA);
    return DAG.getNode(PPCISD::ADD_TLS, dl, PtrVT, TLSReg, MatAddr);
  }

  SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
                                             PPCII::MO_TPREL_HA);
  SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
                                             PPCII::MO_TPREL_LO);
  SDValue TLSReg = is64bit ? DAG.getRegister(PPC::X13, MVT::i64)
                           : DAG.getRegister(PPC::R2, MVT::i32);

  SDValue Hi = DAG.getNode(PPCISD::Hi, dl, PtrVT, TGAHi, TLSReg);
  return DAG.getNode(PPCISD::Lo, dl, PtrVT, TGALo, Hi);
}

if (Model == TLSModel::InitialExec) {
  bool IsPCRel = Subtarget.isUsingPCRelativeCalls();
  SDValue TGA = DAG.getTargetGlobalAddress(
      GV, dl, PtrVT, 0, IsPCRel ? PPCII::MO_GOT_TPREL_PCREL_FLAG : 0);
  SDValue TGATLS = DAG.getTargetGlobalAddress(
      GV, dl, PtrVT, 0,
      IsPCRel ? (PPCII::MO_TLS | PPCII::MO_PCREL_FLAG) : PPCII::MO_TLS);
  SDValue TPOffset;
  if (IsPCRel) {
    SDValue MatPCRel = DAG.getNode(PPCISD::MAT_PCREL_ADDR, dl, PtrVT, TGA);
    TPOffset = DAG.getLoad(MVT::i64, dl, DAG.getEntryNode(), MatPCRel,
                           MachinePointerInfo());
  } else {
    SDValue GOTPtr;
    if (is64bit) {
      setUsesTOCBasePtr(DAG);
      SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
      GOTPtr =
          DAG.getNode(PPCISD::ADDIS_GOT_TPREL_HA, dl, PtrVT, GOTReg, TGA);
    } else {
      if (!TM.isPositionIndependent())
        GOTPtr = DAG.getNode(PPCISD::PPC32_GOT, dl, PtrVT);
      else if (picLevel == PICLevel::SmallPIC)
        GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
      else
        GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
    }
    TPOffset = DAG.getNode(PPCISD::LD_GOT_TPREL_L, dl, PtrVT, TGA, GOTPtr);
  }
  return DAG.getNode(PPCISD::ADD_TLS, dl, PtrVT, TPOffset, TGATLS);
}

if (Model == TLSModel::GeneralDynamic) {
  if (Subtarget.isUsingPCRelativeCalls()) {
    SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
                                             PPCII::MO_GOT_TLSGD_PCREL_FLAG);
    return DAG.getNode(PPCISD::TLS_DYNAMIC_MAT_PCREL_ADDR, dl, PtrVT, TGA);
  }

  SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, 0);
  SDValue GOTPtr;
  if (is64bit) {
    setUsesTOCBasePtr(DAG);
    SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
    GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSGD_HA, dl, PtrVT,
                                 GOTReg, TGA);
  } else {
    if (picLevel == PICLevel::SmallPIC)
      GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
    else
      GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
  }
  return DAG.getNode(PPCISD::ADDI_TLSGD_L_ADDR, dl, PtrVT,
                     GOTPtr, TGA, TGA);
}

if (Model == TLSModel::LocalDynamic) {
  if (Subtarget.isUsingPCRelativeCalls()) {
    SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
                                             PPCII::MO_GOT_TLSLD_PCREL_FLAG);
    SDValue MatPCRel =
        DAG.getNode(PPCISD::TLS_DYNAMIC_MAT_PCREL_ADDR, dl, PtrVT, TGA);
    return DAG.getNode(PPCISD::PADDI_DTPREL, dl, PtrVT, MatPCRel, TGA);
  }

  SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, 0);
  SDValue GOTPtr;
  if (is64bit) {
    setUsesTOCBasePtr(DAG);
    SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
    GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSLD_HA, dl, PtrVT,
                         GOTReg, TGA);
  } else {
    if (picLevel == PICLevel::SmallPIC)
      GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
    else
      GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
  }
  SDValue TLSAddr = DAG.getNode(PPCISD::ADDI_TLSLD_L_ADDR, dl,
                                PtrVT, GOTPtr, TGA, TGA);
  SDValue DtvOffsetHi = DAG.getNode(PPCISD::ADDIS_DTPREL_HA, dl,
                                    PtrVT, TLSAddr, TGA);
  return DAG.getNode(PPCISD::ADDI_DTPREL_L, dl, PtrVT, DtvOffsetHi, TGA);
}

llvm_unreachable("Unknown TLS model!")::llvm::llvm_unreachable_internal("Unknown TLS model!", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3475);
3476}

3478SDValue PPCTargetLowering::LowerGlobalAddress(SDValue Op,
                                            SelectionDAG &DAG) const {
EVT PtrVT = Op.getValueType();
GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
SDLoc DL(GSDN);
const GlobalValue *GV = GSDN->getGlobal();

// 64-bit SVR4 ABI & AIX ABI code is always position-independent.
// The actual address of the GlobalValue is stored in the TOC.
if (Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) {
  if (Subtarget.isUsingPCRelativeCalls()) {
    EVT Ty = getPointerTy(DAG.getDataLayout());
    if (isAccessedAsGotIndirect(Op)) {
      SDValue GA = DAG.getTargetGlobalAddress(GV, DL, Ty, GSDN->getOffset(),
                                              PPCII::MO_PCREL_FLAG |
                                                  PPCII::MO_GOT_FLAG);
      SDValue MatPCRel = DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, GA);
      SDValue Load = DAG.getLoad(MVT::i64, DL, DAG.getEntryNode(), MatPCRel,
                                 MachinePointerInfo());
      return Load;
    } else {
      SDValue GA = DAG.getTargetGlobalAddress(GV, DL, Ty, GSDN->getOffset(),
                                              PPCII::MO_PCREL_FLAG);
      return DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, GA);
    }
  }
  setUsesTOCBasePtr(DAG);
  SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset());
  return getTOCEntry(DAG, DL, GA);
}

unsigned MOHiFlag, MOLoFlag;
bool IsPIC = isPositionIndependent();
getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag, GV);

if (IsPIC && Subtarget.isSVR4ABI()) {
  SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT,
                                          GSDN->getOffset(),
                                          PPCII::MO_PIC_FLAG);
  return getTOCEntry(DAG, DL, GA);
}

SDValue GAHi =
  DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOHiFlag);
SDValue GALo =
  DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOLoFlag);

return LowerLabelRef(GAHi, GALo, IsPIC, DAG);
3526}

3528SDValue PPCTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
bool IsStrict = Op->isStrictFPOpcode();
ISD::CondCode CC =
    cast<CondCodeSDNode>(Op.getOperand(IsStrict ? 3 : 2))->get();
SDValue LHS = Op.getOperand(IsStrict ? 1 : 0);
SDValue RHS = Op.getOperand(IsStrict ? 2 : 1);
SDValue Chain = IsStrict ? Op.getOperand(0) : SDValue();
EVT LHSVT = LHS.getValueType();
SDLoc dl(Op);

// Soften the setcc with libcall if it is fp128.
if (LHSVT == MVT::f128) {
  assert(!Subtarget.hasP9Vector() &&(static_cast <bool> (!Subtarget.hasP9Vector() &&
 "SETCC for f128 is already legal under Power9!") ? void (0) :
 __assert_fail ("!Subtarget.hasP9Vector() && \"SETCC for f128 is already legal under Power9!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3541, __extension__
 __PRETTY_FUNCTION__))
         "SETCC for f128 is already legal under Power9!")(static_cast <bool> (!Subtarget.hasP9Vector() &&
 "SETCC for f128 is already legal under Power9!") ? void (0) :
 __assert_fail ("!Subtarget.hasP9Vector() && \"SETCC for f128 is already legal under Power9!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3541, __extension__
 __PRETTY_FUNCTION__));
  softenSetCCOperands(DAG, LHSVT, LHS, RHS, CC, dl, LHS, RHS, Chain,
                      Op->getOpcode() == ISD::STRICT_FSETCCS);
  if (RHS.getNode())
    LHS = DAG.getNode(ISD::SETCC, dl, Op.getValueType(), LHS, RHS,
                      DAG.getCondCode(CC));
  if (IsStrict)
    return DAG.getMergeValues({LHS, Chain}, dl);
  return LHS;
}

assert(!IsStrict && "Don't know how to handle STRICT_FSETCC!")(static_cast <bool> (!IsStrict && "Don't know how to handle STRICT_FSETCC!"
) ? void (0) : __assert_fail ("!IsStrict && \"Don't know how to handle STRICT_FSETCC!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3552, __extension__
 __PRETTY_FUNCTION__));

if (Op.getValueType() == MVT::v2i64) {
  // When the operands themselves are v2i64 values, we need to do something
  // special because VSX has no underlying comparison operations for these.
  if (LHS.getValueType() == MVT::v2i64) {
    // Equality can be handled by casting to the legal type for Altivec
    // comparisons, everything else needs to be expanded.
    if (CC != ISD::SETEQ && CC != ISD::SETNE)
      return SDValue();
    SDValue SetCC32 = DAG.getSetCC(
        dl, MVT::v4i32, DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, LHS),
        DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, RHS), CC);
    int ShuffV[] = {1, 0, 3, 2};
    SDValue Shuff =
        DAG.getVectorShuffle(MVT::v4i32, dl, SetCC32, SetCC32, ShuffV);
    return DAG.getBitcast(MVT::v2i64,
                          DAG.getNode(CC == ISD::SETEQ ? ISD::AND : ISD::OR,
                                      dl, MVT::v4i32, Shuff, SetCC32));
  }

  // We handle most of these in the usual way.
  return Op;
}

// If we're comparing for equality to zero, expose the fact that this is
// implemented as a ctlz/srl pair on ppc, so that the dag combiner can
// fold the new nodes.
if (SDValue V = lowerCmpEqZeroToCtlzSrl(Op, DAG))
  return V;

if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS)) {
  // Leave comparisons against 0 and -1 alone for now, since they're usually
  // optimized.  FIXME: revisit this when we can custom lower all setcc
  // optimizations.
  if (C->isAllOnes() || C->isZero())
    return SDValue();
}

// If we have an integer seteq/setne, turn it into a compare against zero
// by xor'ing the rhs with the lhs, which is faster than setting a
// condition register, reading it back out, and masking the correct bit.  The
// normal approach here uses sub to do this instead of xor.  Using xor exposes
// the result to other bit-twiddling opportunities.
if (LHSVT.isInteger() && (CC == ISD::SETEQ || CC == ISD::SETNE)) {
  EVT VT = Op.getValueType();
  SDValue Sub = DAG.getNode(ISD::XOR, dl, LHSVT, LHS, RHS);
  return DAG.getSetCC(dl, VT, Sub, DAG.getConstant(0, dl, LHSVT), CC);
}
return SDValue();
3602}

3604SDValue PPCTargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
SDNode *Node = Op.getNode();
EVT VT = Node->getValueType(0);
EVT PtrVT = getPointerTy(DAG.getDataLayout());
SDValue InChain = Node->getOperand(0);
SDValue VAListPtr = Node->getOperand(1);
const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
SDLoc dl(Node);

assert(!Subtarget.isPPC64() && "LowerVAARG is PPC32 only")(static_cast <bool> (!Subtarget.isPPC64() && "LowerVAARG is PPC32 only"
) ? void (0) : __assert_fail ("!Subtarget.isPPC64() && \"LowerVAARG is PPC32 only\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3613, __extension__
 __PRETTY_FUNCTION__));

// gpr_index
SDValue GprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain,
                                  VAListPtr, MachinePointerInfo(SV), MVT::i8);
InChain = GprIndex.getValue(1);

if (VT == MVT::i64) {
  // Check if GprIndex is even
  SDValue GprAnd = DAG.getNode(ISD::AND, dl, MVT::i32, GprIndex,
                               DAG.getConstant(1, dl, MVT::i32));
  SDValue CC64 = DAG.getSetCC(dl, MVT::i32, GprAnd,
                              DAG.getConstant(0, dl, MVT::i32), ISD::SETNE);
  SDValue GprIndexPlusOne = DAG.getNode(ISD::ADD, dl, MVT::i32, GprIndex,
                                        DAG.getConstant(1, dl, MVT::i32));
  // Align GprIndex to be even if it isn't
  GprIndex = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC64, GprIndexPlusOne,
                         GprIndex);
}

// fpr index is 1 byte after gpr
SDValue FprPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
                             DAG.getConstant(1, dl, MVT::i32));

// fpr
SDValue FprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain,
                                  FprPtr, MachinePointerInfo(SV), MVT::i8);
InChain = FprIndex.getValue(1);

SDValue RegSaveAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
                                     DAG.getConstant(8, dl, MVT::i32));

SDValue OverflowAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
                                      DAG.getConstant(4, dl, MVT::i32));

// areas
SDValue OverflowArea =
    DAG.getLoad(MVT::i32, dl, InChain, OverflowAreaPtr, MachinePointerInfo());
InChain = OverflowArea.getValue(1);

SDValue RegSaveArea =
    DAG.getLoad(MVT::i32, dl, InChain, RegSaveAreaPtr, MachinePointerInfo());
InChain = RegSaveArea.getValue(1);

// select overflow_area if index > 8
SDValue CC = DAG.getSetCC(dl, MVT::i32, VT.isInteger() ? GprIndex : FprIndex,
                          DAG.getConstant(8, dl, MVT::i32), ISD::SETLT);

// adjustment constant gpr_index * 4/8
SDValue RegConstant = DAG.getNode(ISD::MUL, dl, MVT::i32,
                                  VT.isInteger() ? GprIndex : FprIndex,
                                  DAG.getConstant(VT.isInteger() ? 4 : 8, dl,
                                                  MVT::i32));

// OurReg = RegSaveArea + RegConstant
SDValue OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, RegSaveArea,
                             RegConstant);

// Floating types are 32 bytes into RegSaveArea
if (VT.isFloatingPoint())
  OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, OurReg,
                       DAG.getConstant(32, dl, MVT::i32));

// increase {f,g}pr_index by 1 (or 2 if VT is i64)
SDValue IndexPlus1 = DAG.getNode(ISD::ADD, dl, MVT::i32,
                                 VT.isInteger() ? GprIndex : FprIndex,
                                 DAG.getConstant(VT == MVT::i64 ? 2 : 1, dl,
                                                 MVT::i32));

InChain = DAG.getTruncStore(InChain, dl, IndexPlus1,
                            VT.isInteger() ? VAListPtr : FprPtr,
                            MachinePointerInfo(SV), MVT::i8);

// determine if we should load from reg_save_area or overflow_area
SDValue Result = DAG.getNode(ISD::SELECT, dl, PtrVT, CC, OurReg, OverflowArea);

// increase overflow_area by 4/8 if gpr/fpr > 8
SDValue OverflowAreaPlusN = DAG.getNode(ISD::ADD, dl, PtrVT, OverflowArea,
                                        DAG.getConstant(VT.isInteger() ? 4 : 8,
                                        dl, MVT::i32));

OverflowArea = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC, OverflowArea,
                           OverflowAreaPlusN);

InChain = DAG.getTruncStore(InChain, dl, OverflowArea, OverflowAreaPtr,
                            MachinePointerInfo(), MVT::i32);

return DAG.getLoad(VT, dl, InChain, Result, MachinePointerInfo());
3701}

3703SDValue PPCTargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const {
assert(!Subtarget.isPPC64() && "LowerVACOPY is PPC32 only")(static_cast <bool> (!Subtarget.isPPC64() && "LowerVACOPY is PPC32 only"
) ? void (0) : __assert_fail ("!Subtarget.isPPC64() && \"LowerVACOPY is PPC32 only\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3704, __extension__
 __PRETTY_FUNCTION__));

// We have to copy the entire va_list struct:
// 2*sizeof(char) + 2 Byte alignment + 2*sizeof(char*) = 12 Byte
return DAG.getMemcpy(Op.getOperand(0), Op, Op.getOperand(1), Op.getOperand(2),
                     DAG.getConstant(12, SDLoc(Op), MVT::i32), Align(8),
                     false, true, false, MachinePointerInfo(),
                     MachinePointerInfo());
3712}

3714SDValue PPCTargetLowering::LowerADJUST_TRAMPOLINE(SDValue Op,
                                                SelectionDAG &DAG) const {
if (Subtarget.isAIXABI())
  report_fatal_error("ADJUST_TRAMPOLINE operation is not supported on AIX.");

return Op.getOperand(0);
3720}

3722SDValue PPCTargetLowering::LowerINLINEASM(SDValue Op, SelectionDAG &DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
PPCFunctionInfo &MFI = *MF.getInfo<PPCFunctionInfo>();

assert((Op.getOpcode() == ISD::INLINEASM ||(static_cast <bool> ((Op.getOpcode() == ISD::INLINEASM ||
 Op.getOpcode() == ISD::INLINEASM_BR) && "Expecting Inline ASM node."
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::INLINEASM || Op.getOpcode() == ISD::INLINEASM_BR) && \"Expecting Inline ASM node.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3728, __extension__
 __PRETTY_FUNCTION__))
        Op.getOpcode() == ISD::INLINEASM_BR) &&(static_cast <bool> ((Op.getOpcode() == ISD::INLINEASM ||
 Op.getOpcode() == ISD::INLINEASM_BR) && "Expecting Inline ASM node."
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::INLINEASM || Op.getOpcode() == ISD::INLINEASM_BR) && \"Expecting Inline ASM node.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3728, __extension__
 __PRETTY_FUNCTION__))
       "Expecting Inline ASM node.")(static_cast <bool> ((Op.getOpcode() == ISD::INLINEASM ||
 Op.getOpcode() == ISD::INLINEASM_BR) && "Expecting Inline ASM node."
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::INLINEASM || Op.getOpcode() == ISD::INLINEASM_BR) && \"Expecting Inline ASM node.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3728, __extension__
 __PRETTY_FUNCTION__));

// If an LR store is already known to be required then there is not point in
// checking this ASM as well.
if (MFI.isLRStoreRequired())
  return Op;

// Inline ASM nodes have an optional last operand that is an incoming Flag of
// type MVT::Glue. We want to ignore this last operand if that is the case.
unsigned NumOps = Op.getNumOperands();
if (Op.getOperand(NumOps - 1).getValueType() == MVT::Glue)
  --NumOps;

// Check all operands that may contain the LR.
for (unsigned i = InlineAsm::Op_FirstOperand; i != NumOps;) {
  unsigned Flags = cast<ConstantSDNode>(Op.getOperand(i))->getZExtValue();
  unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
  ++i; // Skip the ID value.

  switch (InlineAsm::getKind(Flags)) {
  default:
    llvm_unreachable("Bad flags!")::llvm::llvm_unreachable_internal("Bad flags!", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3749);
  case InlineAsm::Kind_RegUse:
  case InlineAsm::Kind_Imm:
  case InlineAsm::Kind_Mem:
    i += NumVals;
    break;
  case InlineAsm::Kind_Clobber:
  case InlineAsm::Kind_RegDef:
  case InlineAsm::Kind_RegDefEarlyClobber: {
    for (; NumVals; --NumVals, ++i) {
      Register Reg = cast<RegisterSDNode>(Op.getOperand(i))->getReg();
      if (Reg != PPC::LR && Reg != PPC::LR8)
        continue;
      MFI.setLRStoreRequired();
      return Op;
    }
    break;
  }
  }
}

return Op;
3771}

3773SDValue PPCTargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
                                              SelectionDAG &DAG) const {
if (Subtarget.isAIXABI())
  report_fatal_error("INIT_TRAMPOLINE operation is not supported on AIX.");

SDValue Chain = Op.getOperand(0);
SDValue Trmp = Op.getOperand(1); // trampoline
SDValue FPtr = Op.getOperand(2); // nested function
SDValue Nest = Op.getOperand(3); // 'nest' parameter value
SDLoc dl(Op);

EVT PtrVT = getPointerTy(DAG.getDataLayout());
bool isPPC64 = (PtrVT == MVT::i64);
Type *IntPtrTy = DAG.getDataLayout().getIntPtrType(*DAG.getContext());

TargetLowering::ArgListTy Args;
TargetLowering::ArgListEntry Entry;

Entry.Ty = IntPtrTy;
Entry.Node = Trmp; Args.push_back(Entry);

// TrampSize == (isPPC64 ? 48 : 40);
Entry.Node = DAG.getConstant(isPPC64 ? 48 : 40, dl,
                             isPPC64 ? MVT::i64 : MVT::i32);
Args.push_back(Entry);

Entry.Node = FPtr; Args.push_back(Entry);
Entry.Node = Nest; Args.push_back(Entry);

// Lower to a call to __trampoline_setup(Trmp, TrampSize, FPtr, ctx_reg)
TargetLowering::CallLoweringInfo CLI(DAG);
CLI.setDebugLoc(dl).setChain(Chain).setLibCallee(
    CallingConv::C, Type::getVoidTy(*DAG.getContext()),
    DAG.getExternalSymbol("__trampoline_setup", PtrVT), std::move(Args));

std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
return CallResult.second;
3810}

3812SDValue PPCTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
EVT PtrVT = getPointerTy(MF.getDataLayout());

SDLoc dl(Op);

if (Subtarget.isPPC64() || Subtarget.isAIXABI()) {
  // vastart just stores the address of the VarArgsFrameIndex slot into the
  // memory location argument.
  SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
  const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
  return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
                      MachinePointerInfo(SV));
}

// For the 32-bit SVR4 ABI we follow the layout of the va_list struct.
// We suppose the given va_list is already allocated.
//
// typedef struct {
//  char gpr;     /* index into the array of 8 GPRs
//                 * stored in the register save area
//                 * gpr=0 corresponds to r3,
//                 * gpr=1 to r4, etc.
//                 */
//  char fpr;     /* index into the array of 8 FPRs
//                 * stored in the register save area
//                 * fpr=0 corresponds to f1,
//                 * fpr=1 to f2, etc.
//                 */
//  char *overflow_arg_area;
//                /* location on stack that holds
//                 * the next overflow argument
//                 */
//  char *reg_save_area;
//               /* where r3:r10 and f1:f8 (if saved)
//                * are stored
//                */
// } va_list[1];

SDValue ArgGPR = DAG.getConstant(FuncInfo->getVarArgsNumGPR(), dl, MVT::i32);
SDValue ArgFPR = DAG.getConstant(FuncInfo->getVarArgsNumFPR(), dl, MVT::i32);
SDValue StackOffsetFI = DAG.getFrameIndex(FuncInfo->getVarArgsStackOffset(),
                                          PtrVT);
SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
                               PtrVT);

uint64_t FrameOffset = PtrVT.getSizeInBits()/8;
SDValue ConstFrameOffset = DAG.getConstant(FrameOffset, dl, PtrVT);

uint64_t StackOffset = PtrVT.getSizeInBits()/8 - 1;
SDValue ConstStackOffset = DAG.getConstant(StackOffset, dl, PtrVT);

uint64_t FPROffset = 1;
SDValue ConstFPROffset = DAG.getConstant(FPROffset, dl, PtrVT);

const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();

// Store first byte : number of int regs
SDValue firstStore =
    DAG.getTruncStore(Op.getOperand(0), dl, ArgGPR, Op.getOperand(1),
                      MachinePointerInfo(SV), MVT::i8);
uint64_t nextOffset = FPROffset;
SDValue nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, Op.getOperand(1),
                                ConstFPROffset);

// Store second byte : number of float regs
SDValue secondStore =
    DAG.getTruncStore(firstStore, dl, ArgFPR, nextPtr,
                      MachinePointerInfo(SV, nextOffset), MVT::i8);
nextOffset += StackOffset;
nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstStackOffset);

// Store second word : arguments given on stack
SDValue thirdStore = DAG.getStore(secondStore, dl, StackOffsetFI, nextPtr,
                                  MachinePointerInfo(SV, nextOffset));
nextOffset += FrameOffset;
nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstFrameOffset);

// Store third word : arguments given in registers
return DAG.getStore(thirdStore, dl, FR, nextPtr,
                    MachinePointerInfo(SV, nextOffset));
3894}

3896/// FPR - The set of FP registers that should be allocated for arguments
3897/// on Darwin and AIX.
3898static const MCPhysReg FPR[] = {PPC::F1,  PPC::F2,  PPC::F3, PPC::F4, PPC::F5,
                              PPC::F6,  PPC::F7,  PPC::F8, PPC::F9, PPC::F10,
                              PPC::F11, PPC::F12, PPC::F13};

3902/// CalculateStackSlotSize - Calculates the size reserved for this argument on
3903/// the stack.
3904static unsigned CalculateStackSlotSize(EVT ArgVT, ISD::ArgFlagsTy Flags,
                                     unsigned PtrByteSize) {
unsigned ArgSize = ArgVT.getStoreSize();
if (Flags.isByVal())
  ArgSize = Flags.getByValSize();

// Round up to multiples of the pointer size, except for array members,
// which are always packed.
if (!Flags.isInConsecutiveRegs())
  ArgSize = ((ArgSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;

return ArgSize;
3916}

3918/// CalculateStackSlotAlignment - Calculates the alignment of this argument
3919/// on the stack.
3920static Align CalculateStackSlotAlignment(EVT ArgVT, EVT OrigVT,
                                       ISD::ArgFlagsTy Flags,
                                       unsigned PtrByteSize) {
Align Alignment(PtrByteSize);

// Altivec parameters are padded to a 16 byte boundary.
if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 ||
    ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 ||
    ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64 ||
    ArgVT == MVT::v1i128 || ArgVT == MVT::f128)
  Alignment = Align(16);

// ByVal parameters are aligned as requested.
if (Flags.isByVal()) {
  auto BVAlign = Flags.getNonZeroByValAlign();
  if (BVAlign > PtrByteSize) {
    if (BVAlign.value() % PtrByteSize != 0)
      llvm_unreachable(::llvm::llvm_unreachable_internal("ByVal alignment is not a multiple of the pointer size"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3938)
          "ByVal alignment is not a multiple of the pointer size")::llvm::llvm_unreachable_internal("ByVal alignment is not a multiple of the pointer size"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 3938);

    Alignment = BVAlign;
  }
}

// Array members are always packed to their original alignment.
if (Flags.isInConsecutiveRegs()) {
  // If the array member was split into multiple registers, the first
  // needs to be aligned to the size of the full type.  (Except for
  // ppcf128, which is only aligned as its f64 components.)
  if (Flags.isSplit() && OrigVT != MVT::ppcf128)
    Alignment = Align(OrigVT.getStoreSize());
  else
    Alignment = Align(ArgVT.getStoreSize());
}

return Alignment;
3956}

3958/// CalculateStackSlotUsed - Return whether this argument will use its
3959/// stack slot (instead of being passed in registers).  ArgOffset,
3960/// AvailableFPRs, and AvailableVRs must hold the current argument
3961/// position, and will be updated to account for this argument.
3962static bool CalculateStackSlotUsed(EVT ArgVT, EVT OrigVT, ISD::ArgFlagsTy Flags,
                                 unsigned PtrByteSize, unsigned LinkageSize,
                                 unsigned ParamAreaSize, unsigned &ArgOffset,
                                 unsigned &AvailableFPRs,
                                 unsigned &AvailableVRs) {
bool UseMemory = false;

// Respect alignment of argument on the stack.
Align Alignment =
    CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
ArgOffset = alignTo(ArgOffset, Alignment);
// If there's no space left in the argument save area, we must
// use memory (this check also catches zero-sized arguments).
if (ArgOffset >= LinkageSize + ParamAreaSize)
  UseMemory = true;

// Allocate argument on the stack.
ArgOffset += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
if (Flags.isInConsecutiveRegsLast())
  ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
// If we overran the argument save area, we must use memory
// (this check catches arguments passed partially in memory)
if (ArgOffset > LinkageSize + ParamAreaSize)
  UseMemory = true;

// However, if the argument is actually passed in an FPR or a VR,
// we don't use memory after all.
if (!Flags.isByVal()) {
  if (ArgVT == MVT::f32 || ArgVT == MVT::f64)
    if (AvailableFPRs > 0) {
      --AvailableFPRs;
      return false;
    }
  if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 ||
      ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 ||
      ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64 ||
      ArgVT == MVT::v1i128 || ArgVT == MVT::f128)
    if (AvailableVRs > 0) {
      --AvailableVRs;
      return false;
    }
}

return UseMemory;
4006}

4008/// EnsureStackAlignment - Round stack frame size up from NumBytes to
4009/// ensure minimum alignment required for target.
4010static unsigned EnsureStackAlignment(const PPCFrameLowering *Lowering,
                                   unsigned NumBytes) {
return alignTo(NumBytes, Lowering->getStackAlign());
4013}

4015SDValue PPCTargetLowering::LowerFormalArguments(
  SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
  const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
  SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {
if (Subtarget.isAIXABI())
  return LowerFormalArguments_AIX(Chain, CallConv, isVarArg, Ins, dl, DAG,
                                  InVals);
if (Subtarget.is64BitELFABI())
  return LowerFormalArguments_64SVR4(Chain, CallConv, isVarArg, Ins, dl, DAG,
                                     InVals);
assert(Subtarget.is32BitELFABI())(static_cast <bool> (Subtarget.is32BitELFABI()) ? void (
0) : __assert_fail ("Subtarget.is32BitELFABI()", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 4025, __extension__ __PRETTY_FUNCTION__));
return LowerFormalArguments_32SVR4(Chain, CallConv, isVarArg, Ins, dl, DAG,
                                   InVals);
4028}

4030SDValue PPCTargetLowering::LowerFormalArguments_32SVR4(
  SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
  const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
  SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {

// 32-bit SVR4 ABI Stack Frame Layout:
//              +-----------------------------------+
//        +-->  |            Back chain             |
//        |     +-----------------------------------+
//        |     | Floating-point register save area |
//        |     +-----------------------------------+
//        |     |    General register save area     |
//        |     +-----------------------------------+
//        |     |          CR save word             |
//        |     +-----------------------------------+
//        |     |         VRSAVE save word          |
//        |     +-----------------------------------+
//        |     |         Alignment padding         |
//        |     +-----------------------------------+
//        |     |     Vector register save area     |
//        |     +-----------------------------------+
//        |     |       Local variable space        |
//        |     +-----------------------------------+
//        |     |        Parameter list area        |
//        |     +-----------------------------------+
//        |     |           LR save word            |
//        |     +-----------------------------------+
// SP-->  +---  |            Back chain             |
//              +-----------------------------------+
//
// Specifications:
//   System V Application Binary Interface PowerPC Processor Supplement
//   AltiVec Technology Programming Interface Manual

MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo &MFI = MF.getFrameInfo();
PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();

EVT PtrVT = getPointerTy(MF.getDataLayout());
// Potential tail calls could cause overwriting of argument stack slots.
bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
                     (CallConv == CallingConv::Fast));
const Align PtrAlign(4);

// Assign locations to all of the incoming arguments.
SmallVector<CCValAssign, 16> ArgLocs;
PPCCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
               *DAG.getContext());

// Reserve space for the linkage area on the stack.
unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
CCInfo.AllocateStack(LinkageSize, PtrAlign);
if (useSoftFloat())
  CCInfo.PreAnalyzeFormalArguments(Ins);

CCInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4);
CCInfo.clearWasPPCF128();

for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
  CCValAssign &VA = ArgLocs[i];

  // Arguments stored in registers.
  if (VA.isRegLoc()) {
    const TargetRegisterClass *RC;
    EVT ValVT = VA.getValVT();

    switch (ValVT.getSimpleVT().SimpleTy) {
      default:
        llvm_unreachable("ValVT not supported by formal arguments Lowering")::llvm::llvm_unreachable_internal("ValVT not supported by formal arguments Lowering"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 4098);
      case MVT::i1:
      case MVT::i32:
        RC = &PPC::GPRCRegClass;
        break;
      case MVT::f32:
        if (Subtarget.hasP8Vector())
          RC = &PPC::VSSRCRegClass;
        else if (Subtarget.hasSPE())
          RC = &PPC::GPRCRegClass;
        else
          RC = &PPC::F4RCRegClass;
        break;
      case MVT::f64:
        if (Subtarget.hasVSX())
          RC = &PPC::VSFRCRegClass;
        else if (Subtarget.hasSPE())
          // SPE passes doubles in GPR pairs.
          RC = &PPC::GPRCRegClass;
        else
          RC = &PPC::F8RCRegClass;
        break;
      case MVT::v16i8:
      case MVT::v8i16:
      case MVT::v4i32:
        RC = &PPC::VRRCRegClass;
        break;
      case MVT::v4f32:
        RC = &PPC::VRRCRegClass;
        break;
      case MVT::v2f64:
      case MVT::v2i64:
        RC = &PPC::VRRCRegClass;
        break;
    }

    SDValue ArgValue;
    // Transform the arguments stored in physical registers into
    // virtual ones.
    if (VA.getLocVT() == MVT::f64 && Subtarget.hasSPE()) {
      assert(i + 1 < e && "No second half of double precision argument")(static_cast <bool> (i + 1 < e && "No second half of double precision argument"
) ? void (0) : __assert_fail ("i + 1 < e && \"No second half of double precision argument\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 4138, __extension__
 __PRETTY_FUNCTION__));
      Register RegLo = MF.addLiveIn(VA.getLocReg(), RC);
      Register RegHi = MF.addLiveIn(ArgLocs[++i].getLocReg(), RC);
      SDValue ArgValueLo = DAG.getCopyFromReg(Chain, dl, RegLo, MVT::i32);
      SDValue ArgValueHi = DAG.getCopyFromReg(Chain, dl, RegHi, MVT::i32);
      if (!Subtarget.isLittleEndian())
        std::swap (ArgValueLo, ArgValueHi);
      ArgValue = DAG.getNode(PPCISD::BUILD_SPE64, dl, MVT::f64, ArgValueLo,
                             ArgValueHi);
    } else {
      Register Reg = MF.addLiveIn(VA.getLocReg(), RC);
      ArgValue = DAG.getCopyFromReg(Chain, dl, Reg,
                                    ValVT == MVT::i1 ? MVT::i32 : ValVT);
      if (ValVT == MVT::i1)
        ArgValue = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, ArgValue);
    }

    InVals.push_back(ArgValue);
  } else {
    // Argument stored in memory.
    assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail
 ("VA.isMemLoc()", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 4158, __extension__ __PRETTY_FUNCTION__));

    // Get the extended size of the argument type in stack
    unsigned ArgSize = VA.getLocVT().getStoreSize();
    // Get the actual size of the argument type
    unsigned ObjSize = VA.getValVT().getStoreSize();
    unsigned ArgOffset = VA.getLocMemOffset();
    // Stack objects in PPC32 are right justified.
    ArgOffset += ArgSize - ObjSize;
    int FI = MFI.CreateFixedObject(ArgSize, ArgOffset, isImmutable);

    // Create load nodes to retrieve arguments from the stack.
    SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
    InVals.push_back(
        DAG.getLoad(VA.getValVT(), dl, Chain, FIN, MachinePointerInfo()));
  }
}

// Assign locations to all of the incoming aggregate by value arguments.
// Aggregates passed by value are stored in the local variable space of the
// caller's stack frame, right above the parameter list area.
SmallVector<CCValAssign, 16> ByValArgLocs;
CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(),
                    ByValArgLocs, *DAG.getContext());

// Reserve stack space for the allocations in CCInfo.
CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrAlign);

CCByValInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4_ByVal);

// Area that is at least reserved in the caller of this function.
unsigned MinReservedArea = CCByValInfo.getNextStackOffset();
MinReservedArea = std::max(MinReservedArea, LinkageSize);

// Set the size that is at least reserved in caller of this function.  Tail
// call optimized function's reserved stack space needs to be aligned so that
// taking the difference between two stack areas will result in an aligned
// stack.
MinReservedArea =
    EnsureStackAlignment(Subtarget.getFrameLowering(), MinReservedArea);
FuncInfo->setMinReservedArea(MinReservedArea);

SmallVector<SDValue, 8> MemOps;

// If the function takes variable number of arguments, make a frame index for
// the start of the first vararg value... for expansion of llvm.va_start.
if (isVarArg) {
  static const MCPhysReg GPArgRegs[] = {
    PPC::R3, PPC::R4, PPC::R5, PPC::R6,
    PPC::R7, PPC::R8, PPC::R9, PPC::R10,
  };
  const unsigned NumGPArgRegs = std::size(GPArgRegs);

  static const MCPhysReg FPArgRegs[] = {
    PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
    PPC::F8
  };
  unsigned NumFPArgRegs = std::size(FPArgRegs);

  if (useSoftFloat() || hasSPE())
     NumFPArgRegs = 0;

  FuncInfo->setVarArgsNumGPR(CCInfo.getFirstUnallocated(GPArgRegs));
  FuncInfo->setVarArgsNumFPR(CCInfo.getFirstUnallocated(FPArgRegs));

  // Make room for NumGPArgRegs and NumFPArgRegs.
  int Depth = NumGPArgRegs * PtrVT.getSizeInBits()/8 +
              NumFPArgRegs * MVT(MVT::f64).getSizeInBits()/8;

  FuncInfo->setVarArgsStackOffset(
    MFI.CreateFixedObject(PtrVT.getSizeInBits()/8,
                          CCInfo.getNextStackOffset(), true));

  FuncInfo->setVarArgsFrameIndex(
      MFI.CreateStackObject(Depth, Align(8), false));
  SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);

  // The fixed integer arguments of a variadic function are stored to the
  // VarArgsFrameIndex on the stack so that they may be loaded by
  // dereferencing the result of va_next.
  for (unsigned GPRIndex = 0; GPRIndex != NumGPArgRegs; ++GPRIndex) {
    // Get an existing live-in vreg, or add a new one.
    Register VReg = MF.getRegInfo().getLiveInVirtReg(GPArgRegs[GPRIndex]);
    if (!VReg)
      VReg = MF.addLiveIn(GPArgRegs[GPRIndex], &PPC::GPRCRegClass);

    SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
    SDValue Store =
        DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
    MemOps.push_back(Store);
    // Increment the address by four for the next argument to store
    SDValue PtrOff = DAG.getConstant(PtrVT.getSizeInBits()/8, dl, PtrVT);
    FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
  }

  // FIXME 32-bit SVR4: We only need to save FP argument registers if CR bit 6
  // is set.
  // The double arguments are stored to the VarArgsFrameIndex
  // on the stack.
  for (unsigned FPRIndex = 0; FPRIndex != NumFPArgRegs; ++FPRIndex) {
    // Get an existing live-in vreg, or add a new one.
    Register VReg = MF.getRegInfo().getLiveInVirtReg(FPArgRegs[FPRIndex]);
    if (!VReg)
      VReg = MF.addLiveIn(FPArgRegs[FPRIndex], &PPC::F8RCRegClass);

    SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::f64);
    SDValue Store =
        DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
    MemOps.push_back(Store);
    // Increment the address by eight for the next argument to store
    SDValue PtrOff = DAG.getConstant(MVT(MVT::f64).getSizeInBits()/8, dl,
                                       PtrVT);
    FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
  }
}

if (!MemOps.empty())
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);

return Chain;
4278}

4280// PPC64 passes i8, i16, and i32 values in i64 registers. Promote
4281// value to MVT::i64 and then truncate to the correct register size.
4282SDValue PPCTargetLowering::extendArgForPPC64(ISD::ArgFlagsTy Flags,
                                           EVT ObjectVT, SelectionDAG &DAG,
                                           SDValue ArgVal,
                                           const SDLoc &dl) const {
if (Flags.isSExt())
  ArgVal = DAG.getNode(ISD::AssertSext, dl, MVT::i64, ArgVal,
                       DAG.getValueType(ObjectVT));
else if (Flags.isZExt())
  ArgVal = DAG.getNode(ISD::AssertZext, dl, MVT::i64, ArgVal,
                       DAG.getValueType(ObjectVT));

return DAG.getNode(ISD::TRUNCATE, dl, ObjectVT, ArgVal);
4294}

4296SDValue PPCTargetLowering::LowerFormalArguments_64SVR4(
  SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
  const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
  SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {
// TODO: add description of PPC stack frame format, or at least some docs.
//
bool isELFv2ABI = Subtarget.isELFv2ABI();
bool isLittleEndian = Subtarget.isLittleEndian();
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo &MFI = MF.getFrameInfo();
PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();

assert(!(CallConv == CallingConv::Fast && isVarArg) &&(static_cast <bool> (!(CallConv == CallingConv::Fast &&
 isVarArg) && "fastcc not supported on varargs functions"
) ? void (0) : __assert_fail ("!(CallConv == CallingConv::Fast && isVarArg) && \"fastcc not supported on varargs functions\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 4309, __extension__
 __PRETTY_FUNCTION__))
       "fastcc not supported on varargs functions")(static_cast <bool> (!(CallConv == CallingConv::Fast &&
 isVarArg) && "fastcc not supported on varargs functions"
) ? void (0) : __assert_fail ("!(CallConv == CallingConv::Fast && isVarArg) && \"fastcc not supported on varargs functions\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 4309, __extension__
 __PRETTY_FUNCTION__));

EVT PtrVT = getPointerTy(MF.getDataLayout());
// Potential tail calls could cause overwriting of argument stack slots.
bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
                     (CallConv == CallingConv::Fast));
unsigned PtrByteSize = 8;
unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();

static const MCPhysReg GPR[] = {
  PPC::X3, PPC::X4, PPC::X5, PPC::X6,
  PPC::X7, PPC::X8, PPC::X9, PPC::X10,
};
static const MCPhysReg VR[] = {
  PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
  PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
};

const unsigned Num_GPR_Regs = std::size(GPR);
const unsigned Num_FPR_Regs = useSoftFloat() ? 0 : 13;
const unsigned Num_VR_Regs = std::size(VR);

// Do a first pass over the arguments to determine whether the ABI
// guarantees that our caller has allocated the parameter save area
// on its stack frame.  In the ELFv1 ABI, this is always the case;
// in the ELFv2 ABI, it is true if this is a vararg function or if
// any parameter is located in a stack slot.

bool HasParameterArea = !isELFv2ABI || isVarArg;
unsigned ParamAreaSize = Num_GPR_Regs * PtrByteSize;
unsigned NumBytes = LinkageSize;
unsigned AvailableFPRs = Num_FPR_Regs;
unsigned AvailableVRs = Num_VR_Regs;
for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
  if (Ins[i].Flags.isNest())
    continue;

  if (CalculateStackSlotUsed(Ins[i].VT, Ins[i].ArgVT, Ins[i].Flags,
                             PtrByteSize, LinkageSize, ParamAreaSize,
                             NumBytes, AvailableFPRs, AvailableVRs))
    HasParameterArea = true;
}

// Add DAG nodes to load the arguments or copy them out of registers.  On
// entry to a function on PPC, the arguments start after the linkage area,
// although the first ones are often in registers.

unsigned ArgOffset = LinkageSize;
unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
SmallVector<SDValue, 8> MemOps;
Function::const_arg_iterator FuncArg = MF.getFunction().arg_begin();
unsigned CurArgIdx = 0;
for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo) {
  SDValue ArgVal;
  bool needsLoad = false;
  EVT ObjectVT = Ins[ArgNo].VT;
  EVT OrigVT = Ins[ArgNo].ArgVT;
  unsigned ObjSize = ObjectVT.getStoreSize();
  unsigned ArgSize = ObjSize;
  ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
  if (Ins[ArgNo].isOrigArg()) {
    std::advance(FuncArg, Ins[ArgNo].getOrigArgIndex() - CurArgIdx);
    CurArgIdx = Ins[ArgNo].getOrigArgIndex();
  }
  // We re-align the argument offset for each argument, except when using the
  // fast calling convention, when we need to make sure we do that only when
  // we'll actually use a stack slot.
  unsigned CurArgOffset;
  Align Alignment;
  auto ComputeArgOffset = [&]() {
    /* Respect alignment of argument on the stack.  */
    Alignment =
        CalculateStackSlotAlignment(ObjectVT, OrigVT, Flags, PtrByteSize);
    ArgOffset = alignTo(ArgOffset, Alignment);
    CurArgOffset = ArgOffset;
  };

  if (CallConv != CallingConv::Fast) {
    ComputeArgOffset();

    /* Compute GPR index associated with argument offset.  */
    GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
    GPR_idx = std::min(GPR_idx, Num_GPR_Regs);
  }

  // FIXME the codegen can be much improved in some cases.
  // We do not have to keep everything in memory.
  if (Flags.isByVal()) {
    assert(Ins[ArgNo].isOrigArg() && "Byval arguments cannot be implicit")(static_cast <bool> (Ins[ArgNo].isOrigArg() && "Byval arguments cannot be implicit"
) ? void (0) : __assert_fail ("Ins[ArgNo].isOrigArg() && \"Byval arguments cannot be implicit\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 4397, __extension__
 __PRETTY_FUNCTION__));

    if (CallConv == CallingConv::Fast)
      ComputeArgOffset();

    // ObjSize is the true size, ArgSize rounded up to multiple of registers.
    ObjSize = Flags.getByValSize();
    ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
    // Empty aggregate parameters do not take up registers.  Examples:
    //   struct { } a;
    //   union  { } b;
    //   int c[0];
    // etc.  However, we have to provide a place-holder in InVals, so
    // pretend we have an 8-byte item at the current address for that
    // purpose.
    if (!ObjSize) {
      int FI = MFI.CreateFixedObject(PtrByteSize, ArgOffset, true);
      SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
      InVals.push_back(FIN);
      continue;
    }

    // Create a stack object covering all stack doublewords occupied
    // by the argument.  If the argument is (fully or partially) on
    // the stack, or if the argument is fully in registers but the
    // caller has allocated the parameter save anyway, we can refer
    // directly to the caller's stack frame.  Otherwise, create a
    // local copy in our own frame.
    int FI;
    if (HasParameterArea ||
        ArgSize + ArgOffset > LinkageSize + Num_GPR_Regs * PtrByteSize)
      FI = MFI.CreateFixedObject(ArgSize, ArgOffset, false, true);
    else
      FI = MFI.CreateStackObject(ArgSize, Alignment, false);
    SDValue FIN = DAG.getFrameIndex(FI, PtrVT);

    // Handle aggregates smaller than 8 bytes.
    if (ObjSize < PtrByteSize) {
      // The value of the object is its address, which differs from the
      // address of the enclosing doubleword on big-endian systems.
      SDValue Arg = FIN;
      if (!isLittleEndian) {
        SDValue ArgOff = DAG.getConstant(PtrByteSize - ObjSize, dl, PtrVT);
        Arg = DAG.getNode(ISD::ADD, dl, ArgOff.getValueType(), Arg, ArgOff);
      }
      InVals.push_back(Arg);

      if (GPR_idx != Num_GPR_Regs) {
        Register VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass);
        FuncInfo->addLiveInAttr(VReg, Flags);
        SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
        EVT ObjType = EVT::getIntegerVT(*DAG.getContext(), ObjSize * 8);
        SDValue Store =
            DAG.getTruncStore(Val.getValue(1), dl, Val, Arg,
                              MachinePointerInfo(&*FuncArg), ObjType);
        MemOps.push_back(Store);
      }
      // Whether we copied from a register or not, advance the offset
      // into the parameter save area by a full doubleword.
      ArgOffset += PtrByteSize;
      continue;
    }

    // The value of the object is its address, which is the address of
    // its first stack doubleword.
    InVals.push_back(FIN);

    // Store whatever pieces of the object are in registers to memory.
    for (unsigned j = 0; j < ArgSize; j += PtrByteSize) {
      if (GPR_idx == Num_GPR_Regs)
        break;

      Register VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
      FuncInfo->addLiveInAttr(VReg, Flags);
      SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
      SDValue Addr = FIN;
      if (j) {
        SDValue Off = DAG.getConstant(j, dl, PtrVT);
        Addr = DAG.getNode(ISD::ADD, dl, Off.getValueType(), Addr, Off);
      }
      unsigned StoreSizeInBits = std::min(PtrByteSize, (ObjSize - j)) * 8;
      EVT ObjType = EVT::getIntegerVT(*DAG.getContext(), StoreSizeInBits);
      SDValue Store =
          DAG.getTruncStore(Val.getValue(1), dl, Val, Addr,
                            MachinePointerInfo(&*FuncArg, j), ObjType);
      MemOps.push_back(Store);
      ++GPR_idx;
    }
    ArgOffset += ArgSize;
    continue;
  }

  switch (ObjectVT.getSimpleVT().SimpleTy) {
  default: llvm_unreachable("Unhandled argument type!")::llvm::llvm_unreachable_internal("Unhandled argument type!",
 "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 4490);
  case MVT::i1:
  case MVT::i32:
  case MVT::i64:
    if (Flags.isNest()) {
      // The 'nest' parameter, if any, is passed in R11.
      Register VReg = MF.addLiveIn(PPC::X11, &PPC::G8RCRegClass);
      ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);

      if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1)
        ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl);

      break;
    }

    // These can be scalar arguments or elements of an integer array type
    // passed directly.  Clang may use those instead of "byval" aggregate
    // types to avoid forcing arguments to memory unnecessarily.
    if (GPR_idx != Num_GPR_Regs) {
      Register VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass);
      FuncInfo->addLiveInAttr(VReg, Flags);
      ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);

      if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1)
        // PPC64 passes i8, i16, and i32 values in i64 registers. Promote
        // value to MVT::i64 and then truncate to the correct register size.
        ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl);
    } else {
      if (CallConv == CallingConv::Fast)
        ComputeArgOffset();

      needsLoad = true;
      ArgSize = PtrByteSize;
    }
    if (CallConv != CallingConv::Fast || needsLoad)
      ArgOffset += 8;
    break;

  case MVT::f32:
  case MVT::f64:
    // These can be scalar arguments or elements of a float array type
    // passed directly.  The latter are used to implement ELFv2 homogenous
    // float aggregates.
    if (FPR_idx != Num_FPR_Regs) {
      unsigned VReg;

      if (ObjectVT == MVT::f32)
        VReg = MF.addLiveIn(FPR[FPR_idx],
                            Subtarget.hasP8Vector()
                                ? &PPC::VSSRCRegClass
                                : &PPC::F4RCRegClass);
      else
        VReg = MF.addLiveIn(FPR[FPR_idx], Subtarget.hasVSX()
                                              ? &PPC::VSFRCRegClass
                                              : &PPC::F8RCRegClass);

      ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
      ++FPR_idx;
    } else if (GPR_idx != Num_GPR_Regs && CallConv != CallingConv::Fast) {
      // FIXME: We may want to re-enable this for CallingConv::Fast on the P8
      // once we support fp <-> gpr moves.

      // This can only ever happen in the presence of f32 array types,
      // since otherwise we never run out of FPRs before running out
      // of GPRs.
      Register VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass);
      FuncInfo->addLiveInAttr(VReg, Flags);
      ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);

      if (ObjectVT == MVT::f32) {
        if ((ArgOffset % PtrByteSize) == (isLittleEndian ? 4 : 0))
          ArgVal = DAG.getNode(ISD::SRL, dl, MVT::i64, ArgVal,
                               DAG.getConstant(32, dl, MVT::i32));
        ArgVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, ArgVal);
      }

      ArgVal = DAG.getNode(ISD::BITCAST, dl, ObjectVT, ArgVal);
    } else {
      if (CallConv == CallingConv::Fast)
        ComputeArgOffset();

      needsLoad = true;
    }

    // When passing an array of floats, the array occupies consecutive
    // space in the argument area; only round up to the next doubleword
    // at the end of the array.  Otherwise, each float takes 8 bytes.
    if (CallConv != CallingConv::Fast || needsLoad) {
      ArgSize = Flags.isInConsecutiveRegs() ? ObjSize : PtrByteSize;
      ArgOffset += ArgSize;
      if (Flags.isInConsecutiveRegsLast())
        ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
    }
    break;
  case MVT::v4f32:
  case MVT::v4i32:
  case MVT::v8i16:
  case MVT::v16i8:
  case MVT::v2f64:
  case MVT::v2i64:
  case MVT::v1i128:
  case MVT::f128:
    // These can be scalar arguments or elements of a vector array type
    // passed directly.  The latter are used to implement ELFv2 homogenous
    // vector aggregates.
    if (VR_idx != Num_VR_Regs) {
      Register VReg = MF.addLiveIn(VR[VR_idx], &PPC::VRRCRegClass);
      ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
      ++VR_idx;
    } else {
      if (CallConv == CallingConv::Fast)
        ComputeArgOffset();
      needsLoad = true;
    }
    if (CallConv != CallingConv::Fast || needsLoad)
      ArgOffset += 16;
    break;
  }

  // We need to load the argument to a virtual register if we determined
  // above that we ran out of physical registers of the appropriate type.
  if (needsLoad) {
    if (ObjSize < ArgSize && !isLittleEndian)
      CurArgOffset += ArgSize - ObjSize;
    int FI = MFI.CreateFixedObject(ObjSize, CurArgOffset, isImmutable);
    SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
    ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, MachinePointerInfo());
  }

  InVals.push_back(ArgVal);
}

// Area that is at least reserved in the caller of this function.
unsigned MinReservedArea;
if (HasParameterArea)
  MinReservedArea = std::max(ArgOffset, LinkageSize + 8 * PtrByteSize);
else
  MinReservedArea = LinkageSize;

// Set the size that is at least reserved in caller of this function.  Tail
// call optimized functions' reserved stack space needs to be aligned so that
// taking the difference between two stack areas will result in an aligned
// stack.
MinReservedArea =
    EnsureStackAlignment(Subtarget.getFrameLowering(), MinReservedArea);
FuncInfo->setMinReservedArea(MinReservedArea);

// If the function takes variable number of arguments, make a frame index for
// the start of the first vararg value... for expansion of llvm.va_start.
// On ELFv2ABI spec, it writes:
// C programs that are intended to be *portable* across different compilers
// and architectures must use the header file <stdarg.h> to deal with variable
// argument lists.
if (isVarArg && MFI.hasVAStart()) {
  int Depth = ArgOffset;

  FuncInfo->setVarArgsFrameIndex(
    MFI.CreateFixedObject(PtrByteSize, Depth, true));
  SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);

  // If this function is vararg, store any remaining integer argument regs
  // to their spots on the stack so that they may be loaded by dereferencing
  // the result of va_next.
  for (GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
       GPR_idx < Num_GPR_Regs; ++GPR_idx) {
    Register VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
    SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
    SDValue Store =
        DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
    MemOps.push_back(Store);
    // Increment the address by four for the next argument to store
    SDValue PtrOff = DAG.getConstant(PtrByteSize, dl, PtrVT);
    FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
  }
}

if (!MemOps.empty())
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);

return Chain;
4670}

4672/// CalculateTailCallSPDiff - Get the amount the stack pointer has to be
4673/// adjusted to accommodate the arguments for the tailcall.
4674static int CalculateTailCallSPDiff(SelectionDAG& DAG, bool isTailCall,
                                 unsigned ParamSize) {

if (!isTailCall) return 0;

PPCFunctionInfo *FI = DAG.getMachineFunction().getInfo<PPCFunctionInfo>();
unsigned CallerMinReservedArea = FI->getMinReservedArea();
int SPDiff = (int)CallerMinReservedArea - (int)ParamSize;
// Remember only if the new adjustment is bigger.
if (SPDiff < FI->getTailCallSPDelta())
  FI->setTailCallSPDelta(SPDiff);

return SPDiff;
4687}

4689static bool isFunctionGlobalAddress(const GlobalValue *CalleeGV);

4691static bool callsShareTOCBase(const Function *Caller,
                            const GlobalValue *CalleeGV,
                            const TargetMachine &TM) {
// It does not make sense to call callsShareTOCBase() with a caller that
// is PC Relative since PC Relative callers do not have a TOC.
4696#ifndef NDEBUG
const PPCSubtarget *STICaller = &TM.getSubtarget<PPCSubtarget>(*Caller);
assert(!STICaller->isUsingPCRelativeCalls() &&(static_cast <bool> (!STICaller->isUsingPCRelativeCalls
() && "PC Relative callers do not have a TOC and cannot share a TOC Base"
) ? void (0) : __assert_fail ("!STICaller->isUsingPCRelativeCalls() && \"PC Relative callers do not have a TOC and cannot share a TOC Base\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 4699, __extension__
 __PRETTY_FUNCTION__))
       "PC Relative callers do not have a TOC and cannot share a TOC Base")(static_cast <bool> (!STICaller->isUsingPCRelativeCalls
() && "PC Relative callers do not have a TOC and cannot share a TOC Base"
) ? void (0) : __assert_fail ("!STICaller->isUsingPCRelativeCalls() && \"PC Relative callers do not have a TOC and cannot share a TOC Base\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 4699, __extension__
 __PRETTY_FUNCTION__));
4700#endif

// Callee is either a GlobalAddress or an ExternalSymbol. ExternalSymbols
// don't have enough information to determine if the caller and callee share
// the same  TOC base, so we have to pessimistically assume they don't for
// correctness.
if (!CalleeGV)
  return false;

// If the callee is preemptable, then the static linker will use a plt-stub
// which saves the toc to the stack, and needs a nop after the call
// instruction to convert to a toc-restore.
if (!TM.shouldAssumeDSOLocal(*Caller->getParent(), CalleeGV))
  return false;

// Functions with PC Relative enabled may clobber the TOC in the same DSO.
// We may need a TOC restore in the situation where the caller requires a
// valid TOC but the callee is PC Relative and does not.
const Function *F = dyn_cast<Function>(CalleeGV);
const GlobalAlias *Alias = dyn_cast<GlobalAlias>(CalleeGV);

// If we have an Alias we can try to get the function from there.
if (Alias) {
  const GlobalObject *GlobalObj = Alias->getAliaseeObject();
  F = dyn_cast<Function>(GlobalObj);
}

// If we still have no valid function pointer we do not have enough
// information to determine if the callee uses PC Relative calls so we must
// assume that it does.
if (!F)
  return false;

// If the callee uses PC Relative we cannot guarantee that the callee won't
// clobber the TOC of the caller and so we must assume that the two
// functions do not share a TOC base.
const PPCSubtarget *STICallee = &TM.getSubtarget<PPCSubtarget>(*F);
if (STICallee->isUsingPCRelativeCalls())
  return false;

// If the GV is not a strong definition then we need to assume it can be
// replaced by another function at link time. The function that replaces
// it may not share the same TOC as the caller since the callee may be
// replaced by a PC Relative version of the same function.
if (!CalleeGV->isStrongDefinitionForLinker())
  return false;

// The medium and large code models are expected to provide a sufficiently
// large TOC to provide all data addressing needs of a module with a
// single TOC.
if (CodeModel::Medium == TM.getCodeModel() ||
    CodeModel::Large == TM.getCodeModel())
  return true;

// Any explicitly-specified sections and section prefixes must also match.
// Also, if we're using -ffunction-sections, then each function is always in
// a different section (the same is true for COMDAT functions).
if (TM.getFunctionSections() || CalleeGV->hasComdat() ||
    Caller->hasComdat() || CalleeGV->getSection() != Caller->getSection())
  return false;
if (const auto *F = dyn_cast<Function>(CalleeGV)) {
  if (F->getSectionPrefix() != Caller->getSectionPrefix())
    return false;
}

return true;
4766}

4768static bool
4769needStackSlotPassParameters(const PPCSubtarget &Subtarget,
                          const SmallVectorImpl<ISD::OutputArg> &Outs) {
assert(Subtarget.is64BitELFABI())(static_cast <bool> (Subtarget.is64BitELFABI()) ? void (
0) : __assert_fail ("Subtarget.is64BitELFABI()", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 4771, __extension__ __PRETTY_FUNCTION__));

const unsigned PtrByteSize = 8;
const unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();

static const MCPhysReg GPR[] = {
  PPC::X3, PPC::X4, PPC::X5, PPC::X6,
  PPC::X7, PPC::X8, PPC::X9, PPC::X10,
};
static const MCPhysReg VR[] = {
  PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
  PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
};

const unsigned NumGPRs = std::size(GPR);
const unsigned NumFPRs = 13;
const unsigned NumVRs = std::size(VR);
const unsigned ParamAreaSize = NumGPRs * PtrByteSize;

unsigned NumBytes = LinkageSize;
unsigned AvailableFPRs = NumFPRs;
unsigned AvailableVRs = NumVRs;

for (const ISD::OutputArg& Param : Outs) {
  if (Param.Flags.isNest()) continue;

  if (CalculateStackSlotUsed(Param.VT, Param.ArgVT, Param.Flags, PtrByteSize,
                             LinkageSize, ParamAreaSize, NumBytes,
                             AvailableFPRs, AvailableVRs))
    return true;
}
return false;
4803}

4805static bool hasSameArgumentList(const Function *CallerFn, const CallBase &CB) {
if (CB.arg_size() != CallerFn->arg_size())
  return false;

auto CalleeArgIter = CB.arg_begin();
auto CalleeArgEnd = CB.arg_end();
Function::const_arg_iterator CallerArgIter = CallerFn->arg_begin();

for (; CalleeArgIter != CalleeArgEnd; ++CalleeArgIter, ++CallerArgIter) {
  const Value* CalleeArg = *CalleeArgIter;
  const Value* CallerArg = &(*CallerArgIter);
  if (CalleeArg == CallerArg)
    continue;

  // e.g. @caller([4 x i64] %a, [4 x i64] %b) {
  //        tail call @callee([4 x i64] undef, [4 x i64] %b)
  //      }
  // 1st argument of callee is undef and has the same type as caller.
  if (CalleeArg->getType() == CallerArg->getType() &&
      isa<UndefValue>(CalleeArg))
    continue;

  return false;
}

return true;
4831}

4833// Returns true if TCO is possible between the callers and callees
4834// calling conventions.
4835static bool
4836areCallingConvEligibleForTCO_64SVR4(CallingConv::ID CallerCC,
                                  CallingConv::ID CalleeCC) {
// Tail calls are possible with fastcc and ccc.
auto isTailCallableCC  = [] (CallingConv::ID CC){
    return  CC == CallingConv::C || CC == CallingConv::Fast;
};
if (!isTailCallableCC(CallerCC) || !isTailCallableCC(CalleeCC))
  return false;

// We can safely tail call both fastcc and ccc callees from a c calling
// convention caller. If the caller is fastcc, we may have less stack space
// than a non-fastcc caller with the same signature so disable tail-calls in
// that case.
return CallerCC == CallingConv::C || CallerCC == CalleeCC;
4850}

4852bool PPCTargetLowering::IsEligibleForTailCallOptimization_64SVR4(
  const GlobalValue *CalleeGV, CallingConv::ID CalleeCC,
  CallingConv::ID CallerCC, const CallBase *CB, bool isVarArg,
  const SmallVectorImpl<ISD::OutputArg> &Outs,
  const SmallVectorImpl<ISD::InputArg> &Ins, const Function *CallerFunc,
  bool isCalleeExternalSymbol) const {
bool TailCallOpt = getTargetMachine().Options.GuaranteedTailCallOpt;

if (DisableSCO && !TailCallOpt) return false;

// Variadic argument functions are not supported.
if (isVarArg) return false;

// Check that the calling conventions are compatible for tco.
if (!areCallingConvEligibleForTCO_64SVR4(CallerCC, CalleeCC))
  return false;

// Caller contains any byval parameter is not supported.
if (any_of(Ins, [](const ISD::InputArg &IA) { return IA.Flags.isByVal(); }))
  return false;

// Callee contains any byval parameter is not supported, too.
// Note: This is a quick work around, because in some cases, e.g.
// caller's stack size > callee's stack size, we are still able to apply
// sibling call optimization. For example, gcc is able to do SCO for caller1
// in the following example, but not for caller2.
//   struct test {
//     long int a;
//     char ary[56];
//   } gTest;
//   __attribute__((noinline)) int callee(struct test v, struct test *b) {
//     b->a = v.a;
//     return 0;
//   }
//   void caller1(struct test a, struct test c, struct test *b) {
//     callee(gTest, b); }
//   void caller2(struct test *b) { callee(gTest, b); }
if (any_of(Outs, [](const ISD::OutputArg& OA) { return OA.Flags.isByVal(); }))
  return false;

// If callee and caller use different calling conventions, we cannot pass
// parameters on stack since offsets for the parameter area may be different.
if (CallerCC != CalleeCC && needStackSlotPassParameters(Subtarget, Outs))
  return false;

// All variants of 64-bit ELF ABIs without PC-Relative addressing require that
// the caller and callee share the same TOC for TCO/SCO. If the caller and
// callee potentially have different TOC bases then we cannot tail call since
// we need to restore the TOC pointer after the call.
// ref: https://bugzilla.mozilla.org/show_bug.cgi?id=973977
// We cannot guarantee this for indirect calls or calls to external functions.
// When PC-Relative addressing is used, the concept of the TOC is no longer
// applicable so this check is not required.
// Check first for indirect calls.
if (!Subtarget.isUsingPCRelativeCalls() &&
    !isFunctionGlobalAddress(CalleeGV) && !isCalleeExternalSymbol)
  return false;

// Check if we share the TOC base.
if (!Subtarget.isUsingPCRelativeCalls() &&
    !callsShareTOCBase(CallerFunc, CalleeGV, getTargetMachine()))
  return false;

// TCO allows altering callee ABI, so we don't have to check further.
if (CalleeCC == CallingConv::Fast && TailCallOpt)
  return true;

if (DisableSCO) return false;

// If callee use the same argument list that caller is using, then we can
// apply SCO on this case. If it is not, then we need to check if callee needs
// stack for passing arguments.
// PC Relative tail calls may not have a CallBase.
// If there is no CallBase we cannot verify if we have the same argument
// list so assume that we don't have the same argument list.
if (CB && !hasSameArgumentList(CallerFunc, *CB) &&
    needStackSlotPassParameters(Subtarget, Outs))
  return false;
else if (!CB && needStackSlotPassParameters(Subtarget, Outs))
  return false;

return true;
4934}

4936/// IsEligibleForTailCallOptimization - Check whether the call is eligible
4937/// for tail call optimization. Targets which want to do tail call
4938/// optimization should implement this function.
4939bool PPCTargetLowering::IsEligibleForTailCallOptimization(
  const GlobalValue *CalleeGV, CallingConv::ID CalleeCC,
  CallingConv::ID CallerCC, bool isVarArg,
  const SmallVectorImpl<ISD::InputArg> &Ins) const {
if (!getTargetMachine().Options.GuaranteedTailCallOpt)
  return false;

// Variable argument functions are not supported.
if (isVarArg)
  return false;

if (CalleeCC == CallingConv::Fast && CallerCC == CalleeCC) {
  // Functions containing by val parameters are not supported.
  if (any_of(Ins, [](const ISD::InputArg &IA) { return IA.Flags.isByVal(); }))
    return false;

  // Non-PIC/GOT tail calls are supported.
  if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
    return true;

  // At the moment we can only do local tail calls (in same module, hidden
  // or protected) if we are generating PIC.
  if (CalleeGV)
    return CalleeGV->hasHiddenVisibility() ||
           CalleeGV->hasProtectedVisibility();
}

return false;
4967}

4969/// isCallCompatibleAddress - Return the immediate to use if the specified
4970/// 32-bit value is representable in the immediate field of a BxA instruction.
4971static SDNode *isBLACompatibleAddress(SDValue Op, SelectionDAG &DAG) {
ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
if (!C) return nullptr;

int Addr = C->getZExtValue();
if ((Addr & 3) != 0 ||  // Low 2 bits are implicitly zero.
    SignExtend32<26>(Addr) != Addr)
  return nullptr;  // Top 6 bits have to be sext of immediate.

return DAG
    .getConstant(
        (int)C->getZExtValue() >> 2, SDLoc(Op),
        DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()))
    .getNode();
4985}

4987namespace {

4989struct TailCallArgumentInfo {
SDValue Arg;
SDValue FrameIdxOp;
int FrameIdx = 0;

TailCallArgumentInfo() = default;
4995};

4997} // end anonymous namespace

4999/// StoreTailCallArgumentsToStackSlot - Stores arguments to their stack slot.
5000static void StoreTailCallArgumentsToStackSlot(
  SelectionDAG &DAG, SDValue Chain,
  const SmallVectorImpl<TailCallArgumentInfo> &TailCallArgs,
  SmallVectorImpl<SDValue> &MemOpChains, const SDLoc &dl) {
for (unsigned i = 0, e = TailCallArgs.size(); i != e; ++i) {
  SDValue Arg = TailCallArgs[i].Arg;
  SDValue FIN = TailCallArgs[i].FrameIdxOp;
  int FI = TailCallArgs[i].FrameIdx;
  // Store relative to framepointer.
  MemOpChains.push_back(DAG.getStore(
      Chain, dl, Arg, FIN,
      MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)));
}
5013}

5015/// EmitTailCallStoreFPAndRetAddr - Move the frame pointer and return address to
5016/// the appropriate stack slot for the tail call optimized function call.
5017static SDValue EmitTailCallStoreFPAndRetAddr(SelectionDAG &DAG, SDValue Chain,
                                           SDValue OldRetAddr, SDValue OldFP,
                                           int SPDiff, const SDLoc &dl) {
if (SPDiff) {
  // Calculate the new stack slot for the return address.
  MachineFunction &MF = DAG.getMachineFunction();
  const PPCSubtarget &Subtarget = MF.getSubtarget<PPCSubtarget>();
  const PPCFrameLowering *FL = Subtarget.getFrameLowering();
  bool isPPC64 = Subtarget.isPPC64();
  int SlotSize = isPPC64 ? 8 : 4;
  int NewRetAddrLoc = SPDiff + FL->getReturnSaveOffset();
  int NewRetAddr = MF.getFrameInfo().CreateFixedObject(SlotSize,
                                                       NewRetAddrLoc, true);
  EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
  SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewRetAddr, VT);
  Chain = DAG.getStore(Chain, dl, OldRetAddr, NewRetAddrFrIdx,
                       MachinePointerInfo::getFixedStack(MF, NewRetAddr));
}
return Chain;
5036}

5038/// CalculateTailCallArgDest - Remember Argument for later processing. Calculate
5039/// the position of the argument.
5040static void
5041CalculateTailCallArgDest(SelectionDAG &DAG, MachineFunction &MF, bool isPPC64,
                       SDValue Arg, int SPDiff, unsigned ArgOffset,
                   SmallVectorImpl<TailCallArgumentInfo>& TailCallArguments) {
int Offset = ArgOffset + SPDiff;
uint32_t OpSize = (Arg.getValueSizeInBits() + 7) / 8;
int FI = MF.getFrameInfo().CreateFixedObject(OpSize, Offset, true);
EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
SDValue FIN = DAG.getFrameIndex(FI, VT);
TailCallArgumentInfo Info;
Info.Arg = Arg;
Info.FrameIdxOp = FIN;
Info.FrameIdx = FI;
TailCallArguments.push_back(Info);
5054}

5056/// EmitTCFPAndRetAddrLoad - Emit load from frame pointer and return address
5057/// stack slot. Returns the chain as result and the loaded frame pointers in
5058/// LROpOut/FPOpout. Used when tail calling.
5059SDValue PPCTargetLowering::EmitTailCallLoadFPAndRetAddr(
  SelectionDAG &DAG, int SPDiff, SDValue Chain, SDValue &LROpOut,
  SDValue &FPOpOut, const SDLoc &dl) const {
if (SPDiff) {
  // Load the LR and FP stack slot for later adjusting.
  EVT VT = Subtarget.isPPC64() ? MVT::i64 : MVT::i32;
  LROpOut = getReturnAddrFrameIndex(DAG);
  LROpOut = DAG.getLoad(VT, dl, Chain, LROpOut, MachinePointerInfo());
  Chain = SDValue(LROpOut.getNode(), 1);
}
return Chain;
5070}

5072/// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
5073/// by "Src" to address "Dst" of size "Size".  Alignment information is
5074/// specified by the specific parameter attribute. The copy will be passed as
5075/// a byval function parameter.
5076/// Sometimes what we are copying is the end of a larger object, the part that
5077/// does not fit in registers.
5078static SDValue CreateCopyOfByValArgument(SDValue Src, SDValue Dst,
                                       SDValue Chain, ISD::ArgFlagsTy Flags,
                                       SelectionDAG &DAG, const SDLoc &dl) {
SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), dl, MVT::i32);
return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode,
                     Flags.getNonZeroByValAlign(), false, false, false,
                     MachinePointerInfo(), MachinePointerInfo());
5085}

5087/// LowerMemOpCallTo - Store the argument to the stack or remember it in case of
5088/// tail calls.
5089static void LowerMemOpCallTo(
  SelectionDAG &DAG, MachineFunction &MF, SDValue Chain, SDValue Arg,
  SDValue PtrOff, int SPDiff, unsigned ArgOffset, bool isPPC64,
  bool isTailCall, bool isVector, SmallVectorImpl<SDValue> &MemOpChains,
  SmallVectorImpl<TailCallArgumentInfo> &TailCallArguments, const SDLoc &dl) {
EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout());
if (!isTailCall) {
  if (isVector) {
    SDValue StackPtr;
    if (isPPC64)
      StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
    else
      StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
    PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr,
                         DAG.getConstant(ArgOffset, dl, PtrVT));
  }
  MemOpChains.push_back(
      DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo()));
  // Calculate and remember argument location.
} else CalculateTailCallArgDest(DAG, MF, isPPC64, Arg, SPDiff, ArgOffset,
                                TailCallArguments);
5110}

5112static void
5113PrepareTailCall(SelectionDAG &DAG, SDValue &InGlue, SDValue &Chain,
              const SDLoc &dl, int SPDiff, unsigned NumBytes, SDValue LROp,
              SDValue FPOp,
              SmallVectorImpl<TailCallArgumentInfo> &TailCallArguments) {
// Emit a sequence of copyto/copyfrom virtual registers for arguments that
// might overwrite each other in case of tail call optimization.
SmallVector<SDValue, 8> MemOpChains2;
// Do not flag preceding copytoreg stuff together with the following stuff.
InGlue = SDValue();
StoreTailCallArgumentsToStackSlot(DAG, Chain, TailCallArguments,
                                  MemOpChains2, dl);
if (!MemOpChains2.empty())
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains2);

// Store the return address to the appropriate stack slot.
Chain = EmitTailCallStoreFPAndRetAddr(DAG, Chain, LROp, FPOp, SPDiff, dl);

// Emit callseq_end just before tailcall node.
Chain = DAG.getCALLSEQ_END(Chain, NumBytes, 0, InGlue, dl);
InGlue = Chain.getValue(1);
5133}

5135// Is this global address that of a function that can be called by name? (as
5136// opposed to something that must hold a descriptor for an indirect call).
5137static bool isFunctionGlobalAddress(const GlobalValue *GV) {
if (GV) {
  if (GV->isThreadLocal())
    return false;

  return GV->getValueType()->isFunctionTy();
}

return false;
5146}

5148SDValue PPCTargetLowering::LowerCallResult(
  SDValue Chain, SDValue InGlue, CallingConv::ID CallConv, bool isVarArg,
  const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
  SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {
SmallVector<CCValAssign, 16> RVLocs;
CCState CCRetInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
                  *DAG.getContext());

CCRetInfo.AnalyzeCallResult(
    Ins, (Subtarget.isSVR4ABI() && CallConv == CallingConv::Cold)
             ? RetCC_PPC_Cold
             : RetCC_PPC);

// Copy all of the result registers out of their specified physreg.
for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
  CCValAssign &VA = RVLocs[i];
  assert(VA.isRegLoc() && "Can only return in registers!")(static_cast <bool> (VA.isRegLoc() && "Can only return in registers!"
) ? void (0) : __assert_fail ("VA.isRegLoc() && \"Can only return in registers!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5164, __extension__
 __PRETTY_FUNCTION__));

  SDValue Val;

  if (Subtarget.hasSPE() && VA.getLocVT() == MVT::f64) {
    SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
                                    InGlue);
    Chain = Lo.getValue(1);
    InGlue = Lo.getValue(2);
    VA = RVLocs[++i]; // skip ahead to next loc
    SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
                                    InGlue);
    Chain = Hi.getValue(1);
    InGlue = Hi.getValue(2);
    if (!Subtarget.isLittleEndian())
      std::swap (Lo, Hi);
    Val = DAG.getNode(PPCISD::BUILD_SPE64, dl, MVT::f64, Lo, Hi);
  } else {
    Val = DAG.getCopyFromReg(Chain, dl,
                             VA.getLocReg(), VA.getLocVT(), InGlue);
    Chain = Val.getValue(1);
    InGlue = Val.getValue(2);
  }

  switch (VA.getLocInfo()) {
  default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5189);
  case CCValAssign::Full: break;
  case CCValAssign::AExt:
    Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
    break;
  case CCValAssign::ZExt:
    Val = DAG.getNode(ISD::AssertZext, dl, VA.getLocVT(), Val,
                      DAG.getValueType(VA.getValVT()));
    Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
    break;
  case CCValAssign::SExt:
    Val = DAG.getNode(ISD::AssertSext, dl, VA.getLocVT(), Val,
                      DAG.getValueType(VA.getValVT()));
    Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
    break;
  }

  InVals.push_back(Val);
}

return Chain;
5210}

5212static bool isIndirectCall(const SDValue &Callee, SelectionDAG &DAG,
                         const PPCSubtarget &Subtarget, bool isPatchPoint) {
auto *G = dyn_cast<GlobalAddressSDNode>(Callee);
const GlobalValue *GV = G ? G->getGlobal() : nullptr;

// PatchPoint calls are not indirect.
if (isPatchPoint)
  return false;

if (isFunctionGlobalAddress(GV) || isa<ExternalSymbolSDNode>(Callee))
  return false;

// Darwin, and 32-bit ELF can use a BLA. The descriptor based ABIs can not
// becuase the immediate function pointer points to a descriptor instead of
// a function entry point. The ELFv2 ABI cannot use a BLA because the function
// pointer immediate points to the global entry point, while the BLA would
// need to jump to the local entry point (see rL211174).
if (!Subtarget.usesFunctionDescriptors() && !Subtarget.isELFv2ABI() &&
    isBLACompatibleAddress(Callee, DAG))
  return false;

return true;
5234}

5236// AIX and 64-bit ELF ABIs w/o PCRel require a TOC save/restore around calls.
5237static inline bool isTOCSaveRestoreRequired(const PPCSubtarget &Subtarget) {
return Subtarget.isAIXABI() ||
       (Subtarget.is64BitELFABI() && !Subtarget.isUsingPCRelativeCalls());
5240}

5242static unsigned getCallOpcode(PPCTargetLowering::CallFlags CFlags,
                            const Function &Caller, const SDValue &Callee,
                            const PPCSubtarget &Subtarget,
                            const TargetMachine &TM,
                            bool IsStrictFPCall = false) {
if (CFlags.IsTailCall)
  return PPCISD::TC_RETURN;

unsigned RetOpc = 0;
// This is a call through a function pointer.
if (CFlags.IsIndirect) {
  // AIX and the 64-bit ELF ABIs need to maintain the TOC pointer accross
  // indirect calls. The save of the caller's TOC pointer to the stack will be
  // inserted into the DAG as part of call lowering. The restore of the TOC
  // pointer is modeled by using a pseudo instruction for the call opcode that
  // represents the 2 instruction sequence of an indirect branch and link,
  // immediately followed by a load of the TOC pointer from the the stack save
  // slot into gpr2. For 64-bit ELFv2 ABI with PCRel, do not restore the TOC
  // as it is not saved or used.
  RetOpc = isTOCSaveRestoreRequired(Subtarget) ? PPCISD::BCTRL_LOAD_TOC
                                               : PPCISD::BCTRL;
} else if (Subtarget.isUsingPCRelativeCalls()) {
  assert(Subtarget.is64BitELFABI() && "PC Relative is only on ELF ABI.")(static_cast <bool> (Subtarget.is64BitELFABI() &&
 "PC Relative is only on ELF ABI.") ? void (0) : __assert_fail
 ("Subtarget.is64BitELFABI() && \"PC Relative is only on ELF ABI.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5264, __extension__
 __PRETTY_FUNCTION__));
  RetOpc = PPCISD::CALL_NOTOC;
} else if (Subtarget.isAIXABI() || Subtarget.is64BitELFABI()) {
  // The ABIs that maintain a TOC pointer accross calls need to have a nop
  // immediately following the call instruction if the caller and callee may
  // have different TOC bases. At link time if the linker determines the calls
  // may not share a TOC base, the call is redirected to a trampoline inserted
  // by the linker. The trampoline will (among other things) save the callers
  // TOC pointer at an ABI designated offset in the linkage area and the
  // linker will rewrite the nop to be a load of the TOC pointer from the
  // linkage area into gpr2.
  auto *G = dyn_cast<GlobalAddressSDNode>(Callee);
  const GlobalValue *GV = G ? G->getGlobal() : nullptr;
  RetOpc =
      callsShareTOCBase(&Caller, GV, TM) ? PPCISD::CALL : PPCISD::CALL_NOP;
} else
  RetOpc = PPCISD::CALL;
if (IsStrictFPCall) {
  switch (RetOpc) {
  default:
    llvm_unreachable("Unknown call opcode")::llvm::llvm_unreachable_internal("Unknown call opcode", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5284);
  case PPCISD::BCTRL_LOAD_TOC:
    RetOpc = PPCISD::BCTRL_LOAD_TOC_RM;
    break;
  case PPCISD::BCTRL:
    RetOpc = PPCISD::BCTRL_RM;
    break;
  case PPCISD::CALL_NOTOC:
    RetOpc = PPCISD::CALL_NOTOC_RM;
    break;
  case PPCISD::CALL:
    RetOpc = PPCISD::CALL_RM;
    break;
  case PPCISD::CALL_NOP:
    RetOpc = PPCISD::CALL_NOP_RM;
    break;
  }
}
return RetOpc;
5303}

5305static SDValue transformCallee(const SDValue &Callee, SelectionDAG &DAG,
                             const SDLoc &dl, const PPCSubtarget &Subtarget) {
if (!Subtarget.usesFunctionDescriptors() && !Subtarget.isELFv2ABI())
  if (SDNode *Dest = isBLACompatibleAddress(Callee, DAG))
    return SDValue(Dest, 0);

// Returns true if the callee is local, and false otherwise.
auto isLocalCallee = [&]() {
  const GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
  const Module *Mod = DAG.getMachineFunction().getFunction().getParent();
  const GlobalValue *GV = G ? G->getGlobal() : nullptr;

  return DAG.getTarget().shouldAssumeDSOLocal(*Mod, GV) &&
         !isa_and_nonnull<GlobalIFunc>(GV);
};

// The PLT is only used in 32-bit ELF PIC mode.  Attempting to use the PLT in
// a static relocation model causes some versions of GNU LD (2.17.50, at
// least) to force BSS-PLT, instead of secure-PLT, even if all objects are
// built with secure-PLT.
bool UsePlt =
    Subtarget.is32BitELFABI() && !isLocalCallee() &&
    Subtarget.getTargetMachine().getRelocationModel() == Reloc::PIC_;

const auto getAIXFuncEntryPointSymbolSDNode = [&](const GlobalValue *GV) {
  const TargetMachine &TM = Subtarget.getTargetMachine();
  const TargetLoweringObjectFile *TLOF = TM.getObjFileLowering();
  MCSymbolXCOFF *S =
      cast<MCSymbolXCOFF>(TLOF->getFunctionEntryPointSymbol(GV, TM));

  MVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout());
  return DAG.getMCSymbol(S, PtrVT);
};

auto *G = dyn_cast<GlobalAddressSDNode>(Callee);
const GlobalValue *GV = G ? G->getGlobal() : nullptr;
if (isFunctionGlobalAddress(GV)) {
  const GlobalValue *GV = cast<GlobalAddressSDNode>(Callee)->getGlobal();

  if (Subtarget.isAIXABI()) {
    assert(!isa<GlobalIFunc>(GV) && "IFunc is not supported on AIX.")(static_cast <bool> (!isa<GlobalIFunc>(GV) &&
 "IFunc is not supported on AIX.") ? void (0) : __assert_fail
 ("!isa<GlobalIFunc>(GV) && \"IFunc is not supported on AIX.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5345, __extension__
 __PRETTY_FUNCTION__));
    return getAIXFuncEntryPointSymbolSDNode(GV);
  }
  return DAG.getTargetGlobalAddress(GV, dl, Callee.getValueType(), 0,
                                    UsePlt ? PPCII::MO_PLT : 0);
}

if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
  const char *SymName = S->getSymbol();
  if (Subtarget.isAIXABI()) {
    // If there exists a user-declared function whose name is the same as the
    // ExternalSymbol's, then we pick up the user-declared version.
    const Module *Mod = DAG.getMachineFunction().getFunction().getParent();
    if (const Function *F =
            dyn_cast_or_null<Function>(Mod->getNamedValue(SymName)))
      return getAIXFuncEntryPointSymbolSDNode(F);

    // On AIX, direct function calls reference the symbol for the function's
    // entry point, which is named by prepending a "." before the function's
    // C-linkage name. A Qualname is returned here because an external
    // function entry point is a csect with XTY_ER property.
    const auto getExternalFunctionEntryPointSymbol = [&](StringRef SymName) {
      auto &Context = DAG.getMachineFunction().getMMI().getContext();
      MCSectionXCOFF *Sec = Context.getXCOFFSection(
          (Twine(".") + Twine(SymName)).str(), SectionKind::getMetadata(),
          XCOFF::CsectProperties(XCOFF::XMC_PR, XCOFF::XTY_ER));
      return Sec->getQualNameSymbol();
    };

    SymName = getExternalFunctionEntryPointSymbol(SymName)->getName().data();
  }
  return DAG.getTargetExternalSymbol(SymName, Callee.getValueType(),
                                     UsePlt ? PPCII::MO_PLT : 0);
}

// No transformation needed.
assert(Callee.getNode() && "What no callee?")(static_cast <bool> (Callee.getNode() && "What no callee?"
) ? void (0) : __assert_fail ("Callee.getNode() && \"What no callee?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5381, __extension__
 __PRETTY_FUNCTION__));
return Callee;
5383}

5385static SDValue getOutputChainFromCallSeq(SDValue CallSeqStart) {
assert(CallSeqStart.getOpcode() == ISD::CALLSEQ_START &&(static_cast <bool> (CallSeqStart.getOpcode() == ISD::CALLSEQ_START
 && "Expected a CALLSEQ_STARTSDNode.") ? void (0) : __assert_fail
 ("CallSeqStart.getOpcode() == ISD::CALLSEQ_START && \"Expected a CALLSEQ_STARTSDNode.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5387, __extension__
 __PRETTY_FUNCTION__))
       "Expected a CALLSEQ_STARTSDNode.")(static_cast <bool> (CallSeqStart.getOpcode() == ISD::CALLSEQ_START
 && "Expected a CALLSEQ_STARTSDNode.") ? void (0) : __assert_fail
 ("CallSeqStart.getOpcode() == ISD::CALLSEQ_START && \"Expected a CALLSEQ_STARTSDNode.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5387, __extension__
 __PRETTY_FUNCTION__));

// The last operand is the chain, except when the node has glue. If the node
// has glue, then the last operand is the glue, and the chain is the second
// last operand.
SDValue LastValue = CallSeqStart.getValue(CallSeqStart->getNumValues() - 1);
if (LastValue.getValueType() != MVT::Glue)
  return LastValue;

return CallSeqStart.getValue(CallSeqStart->getNumValues() - 2);
5397}

5399// Creates the node that moves a functions address into the count register
5400// to prepare for an indirect call instruction.
5401static void prepareIndirectCall(SelectionDAG &DAG, SDValue &Callee,
                              SDValue &Glue, SDValue &Chain,
                              const SDLoc &dl) {
SDValue MTCTROps[] = {Chain, Callee, Glue};
EVT ReturnTypes[] = {MVT::Other, MVT::Glue};
Chain = DAG.getNode(PPCISD::MTCTR, dl, ArrayRef(ReturnTypes, 2),
                    ArrayRef(MTCTROps, Glue.getNode() ? 3 : 2));
// The glue is the second value produced.
Glue = Chain.getValue(1);
5410}

5412static void prepareDescriptorIndirectCall(SelectionDAG &DAG, SDValue &Callee,
                                        SDValue &Glue, SDValue &Chain,
                                        SDValue CallSeqStart,
                                        const CallBase *CB, const SDLoc &dl,
                                        bool hasNest,
                                        const PPCSubtarget &Subtarget) {
// Function pointers in the 64-bit SVR4 ABI do not point to the function
// entry point, but to the function descriptor (the function entry point
// address is part of the function descriptor though).
// The function descriptor is a three doubleword structure with the
// following fields: function entry point, TOC base address and
// environment pointer.
// Thus for a call through a function pointer, the following actions need
// to be performed:
//   1. Save the TOC of the caller in the TOC save area of its stack
//      frame (this is done in LowerCall_Darwin() or LowerCall_64SVR4()).
//   2. Load the address of the function entry point from the function
//      descriptor.
//   3. Load the TOC of the callee from the function descriptor into r2.
//   4. Load the environment pointer from the function descriptor into
//      r11.
//   5. Branch to the function entry point address.
//   6. On return of the callee, the TOC of the caller needs to be
//      restored (this is done in FinishCall()).
//
// The loads are scheduled at the beginning of the call sequence, and the
// register copies are flagged together to ensure that no other
// operations can be scheduled in between. E.g. without flagging the
// copies together, a TOC access in the caller could be scheduled between
// the assignment of the callee TOC and the branch to the callee, which leads
// to incorrect code.

// Start by loading the function address from the descriptor.
SDValue LDChain = getOutputChainFromCallSeq(CallSeqStart);
auto MMOFlags = Subtarget.hasInvariantFunctionDescriptors()
                    ? (MachineMemOperand::MODereferenceable |
                       MachineMemOperand::MOInvariant)
                    : MachineMemOperand::MONone;

MachinePointerInfo MPI(CB ? CB->getCalledOperand() : nullptr);

// Registers used in building the DAG.
const MCRegister EnvPtrReg = Subtarget.getEnvironmentPointerRegister();
const MCRegister TOCReg = Subtarget.getTOCPointerRegister();

// Offsets of descriptor members.
const unsigned TOCAnchorOffset = Subtarget.descriptorTOCAnchorOffset();
const unsigned EnvPtrOffset = Subtarget.descriptorEnvironmentPointerOffset();

const MVT RegVT = Subtarget.isPPC64() ? MVT::i64 : MVT::i32;
const Align Alignment = Subtarget.isPPC64() ? Align(8) : Align(4);

// One load for the functions entry point address.
SDValue LoadFuncPtr = DAG.getLoad(RegVT, dl, LDChain, Callee, MPI,
                                  Alignment, MMOFlags);

// One for loading the TOC anchor for the module that contains the called
// function.
SDValue TOCOff = DAG.getIntPtrConstant(TOCAnchorOffset, dl);
SDValue AddTOC = DAG.getNode(ISD::ADD, dl, RegVT, Callee, TOCOff);
SDValue TOCPtr =
    DAG.getLoad(RegVT, dl, LDChain, AddTOC,
                MPI.getWithOffset(TOCAnchorOffset), Alignment, MMOFlags);

// One for loading the environment pointer.
SDValue PtrOff = DAG.getIntPtrConstant(EnvPtrOffset, dl);
SDValue AddPtr = DAG.getNode(ISD::ADD, dl, RegVT, Callee, PtrOff);
SDValue LoadEnvPtr =
    DAG.getLoad(RegVT, dl, LDChain, AddPtr,
                MPI.getWithOffset(EnvPtrOffset), Alignment, MMOFlags);


// Then copy the newly loaded TOC anchor to the TOC pointer.
SDValue TOCVal = DAG.getCopyToReg(Chain, dl, TOCReg, TOCPtr, Glue);
Chain = TOCVal.getValue(0);
Glue = TOCVal.getValue(1);

// If the function call has an explicit 'nest' parameter, it takes the
// place of the environment pointer.
assert((!hasNest || !Subtarget.isAIXABI()) &&(static_cast <bool> ((!hasNest || !Subtarget.isAIXABI()
) && "Nest parameter is not supported on AIX.") ? void
 (0) : __assert_fail ("(!hasNest || !Subtarget.isAIXABI()) && \"Nest parameter is not supported on AIX.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5492, __extension__
 __PRETTY_FUNCTION__))
       "Nest parameter is not supported on AIX.")(static_cast <bool> ((!hasNest || !Subtarget.isAIXABI()
) && "Nest parameter is not supported on AIX.") ? void
 (0) : __assert_fail ("(!hasNest || !Subtarget.isAIXABI()) && \"Nest parameter is not supported on AIX.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5492, __extension__
 __PRETTY_FUNCTION__));
if (!hasNest) {
  SDValue EnvVal = DAG.getCopyToReg(Chain, dl, EnvPtrReg, LoadEnvPtr, Glue);
  Chain = EnvVal.getValue(0);
  Glue = EnvVal.getValue(1);
}

// The rest of the indirect call sequence is the same as the non-descriptor
// DAG.
prepareIndirectCall(DAG, LoadFuncPtr, Glue, Chain, dl);
5502}

5504static void
5505buildCallOperands(SmallVectorImpl<SDValue> &Ops,
                PPCTargetLowering::CallFlags CFlags, const SDLoc &dl,
                SelectionDAG &DAG,
                SmallVector<std::pair<unsigned, SDValue>, 8> &RegsToPass,
                SDValue Glue, SDValue Chain, SDValue &Callee, int SPDiff,
                const PPCSubtarget &Subtarget) {
const bool IsPPC64 = Subtarget.isPPC64();
// MVT for a general purpose register.
const MVT RegVT = IsPPC64 ? MVT::i64 : MVT::i32;

// First operand is always the chain.
Ops.push_back(Chain);

// If it's a direct call pass the callee as the second operand.
if (!CFlags.IsIndirect)
  Ops.push_back(Callee);
else {
  assert(!CFlags.IsPatchPoint && "Patch point calls are not indirect.")(static_cast <bool> (!CFlags.IsPatchPoint && "Patch point calls are not indirect."
) ? void (0) : __assert_fail ("!CFlags.IsPatchPoint && \"Patch point calls are not indirect.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5522, __extension__
 __PRETTY_FUNCTION__));

  // For the TOC based ABIs, we have saved the TOC pointer to the linkage area
  // on the stack (this would have been done in `LowerCall_64SVR4` or
  // `LowerCall_AIX`). The call instruction is a pseudo instruction that
  // represents both the indirect branch and a load that restores the TOC
  // pointer from the linkage area. The operand for the TOC restore is an add
  // of the TOC save offset to the stack pointer. This must be the second
  // operand: after the chain input but before any other variadic arguments.
  // For 64-bit ELFv2 ABI with PCRel, do not restore the TOC as it is not
  // saved or used.
  if (isTOCSaveRestoreRequired(Subtarget)) {
    const MCRegister StackPtrReg = Subtarget.getStackPointerRegister();

    SDValue StackPtr = DAG.getRegister(StackPtrReg, RegVT);
    unsigned TOCSaveOffset = Subtarget.getFrameLowering()->getTOCSaveOffset();
    SDValue TOCOff = DAG.getIntPtrConstant(TOCSaveOffset, dl);
    SDValue AddTOC = DAG.getNode(ISD::ADD, dl, RegVT, StackPtr, TOCOff);
    Ops.push_back(AddTOC);
  }

  // Add the register used for the environment pointer.
  if (Subtarget.usesFunctionDescriptors() && !CFlags.HasNest)
    Ops.push_back(DAG.getRegister(Subtarget.getEnvironmentPointerRegister(),
                                  RegVT));


  // Add CTR register as callee so a bctr can be emitted later.
  if (CFlags.IsTailCall)
    Ops.push_back(DAG.getRegister(IsPPC64 ? PPC::CTR8 : PPC::CTR, RegVT));
}

// If this is a tail call add stack pointer delta.
if (CFlags.IsTailCall)
  Ops.push_back(DAG.getConstant(SPDiff, dl, MVT::i32));

// Add argument registers to the end of the list so that they are known live
// into the call.
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
  Ops.push_back(DAG.getRegister(RegsToPass[i].first,
                                RegsToPass[i].second.getValueType()));

// We cannot add R2/X2 as an operand here for PATCHPOINT, because there is
// no way to mark dependencies as implicit here.
// We will add the R2/X2 dependency in EmitInstrWithCustomInserter.
if ((Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) &&
     !CFlags.IsPatchPoint && !Subtarget.isUsingPCRelativeCalls())
  Ops.push_back(DAG.getRegister(Subtarget.getTOCPointerRegister(), RegVT));

// Add implicit use of CR bit 6 for 32-bit SVR4 vararg calls
if (CFlags.IsVarArg && Subtarget.is32BitELFABI())
  Ops.push_back(DAG.getRegister(PPC::CR1EQ, MVT::i32));

// Add a register mask operand representing the call-preserved registers.
const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo();
const uint32_t *Mask =
    TRI->getCallPreservedMask(DAG.getMachineFunction(), CFlags.CallConv);
assert(Mask && "Missing call preserved mask for calling convention")(static_cast <bool> (Mask && "Missing call preserved mask for calling convention"
) ? void (0) : __assert_fail ("Mask && \"Missing call preserved mask for calling convention\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5579, __extension__
 __PRETTY_FUNCTION__));
Ops.push_back(DAG.getRegisterMask(Mask));

// If the glue is valid, it is the last operand.
if (Glue.getNode())
  Ops.push_back(Glue);
5585}

5587SDValue PPCTargetLowering::FinishCall(
  CallFlags CFlags, const SDLoc &dl, SelectionDAG &DAG,
  SmallVector<std::pair<unsigned, SDValue>, 8> &RegsToPass, SDValue Glue,
  SDValue Chain, SDValue CallSeqStart, SDValue &Callee, int SPDiff,
  unsigned NumBytes, const SmallVectorImpl<ISD::InputArg> &Ins,
  SmallVectorImpl<SDValue> &InVals, const CallBase *CB) const {

if ((Subtarget.is64BitELFABI() && !Subtarget.isUsingPCRelativeCalls()) ||
    Subtarget.isAIXABI())
  setUsesTOCBasePtr(DAG);

unsigned CallOpc =
    getCallOpcode(CFlags, DAG.getMachineFunction().getFunction(), Callee,
                  Subtarget, DAG.getTarget(), CB ? CB->isStrictFP() : false);

if (!CFlags.IsIndirect)
  Callee = transformCallee(Callee, DAG, dl, Subtarget);
else if (Subtarget.usesFunctionDescriptors())
  prepareDescriptorIndirectCall(DAG, Callee, Glue, Chain, CallSeqStart, CB,
                                dl, CFlags.HasNest, Subtarget);
else
  prepareIndirectCall(DAG, Callee, Glue, Chain, dl);

// Build the operand list for the call instruction.
SmallVector<SDValue, 8> Ops;
buildCallOperands(Ops, CFlags, dl, DAG, RegsToPass, Glue, Chain, Callee,
                  SPDiff, Subtarget);

// Emit tail call.
if (CFlags.IsTailCall) {
  // Indirect tail call when using PC Relative calls do not have the same
  // constraints.
  assert(((Callee.getOpcode() == ISD::Register &&(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__))
           cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) ||(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__))
          Callee.getOpcode() == ISD::TargetExternalSymbol ||(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__))
          Callee.getOpcode() == ISD::TargetGlobalAddress ||(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__))
          isa<ConstantSDNode>(Callee) ||(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__))
          (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) &&(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__))
         "Expecting a global address, external symbol, absolute value, "(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__))
         "register or an indirect tail call when PC Relative calls are "(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__))
         "used.")(static_cast <bool> (((Callee.getOpcode() == ISD::Register
 && cast<RegisterSDNode>(Callee)->getReg() ==
 PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol
 || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<
ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget
.isUsingPCRelativeCalls())) && "Expecting a global address, external symbol, absolute value, "
 "register or an indirect tail call when PC Relative calls are "
 "used.") ? void (0) : __assert_fail ("((Callee.getOpcode() == ISD::Register && cast<RegisterSDNode>(Callee)->getReg() == PPC::CTR) || Callee.getOpcode() == ISD::TargetExternalSymbol || Callee.getOpcode() == ISD::TargetGlobalAddress || isa<ConstantSDNode>(Callee) || (CFlags.IsIndirect && Subtarget.isUsingPCRelativeCalls())) && \"Expecting a global address, external symbol, absolute value, \" \"register or an indirect tail call when PC Relative calls are \" \"used.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5627, __extension__
 __PRETTY_FUNCTION__));
  // PC Relative calls also use TC_RETURN as the way to mark tail calls.
  assert(CallOpc == PPCISD::TC_RETURN &&(static_cast <bool> (CallOpc == PPCISD::TC_RETURN &&
 "Unexpected call opcode for a tail call.") ? void (0) : __assert_fail
 ("CallOpc == PPCISD::TC_RETURN && \"Unexpected call opcode for a tail call.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5630, __extension__
 __PRETTY_FUNCTION__))
         "Unexpected call opcode for a tail call.")(static_cast <bool> (CallOpc == PPCISD::TC_RETURN &&
 "Unexpected call opcode for a tail call.") ? void (0) : __assert_fail
 ("CallOpc == PPCISD::TC_RETURN && \"Unexpected call opcode for a tail call.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5630, __extension__
 __PRETTY_FUNCTION__));
  DAG.getMachineFunction().getFrameInfo().setHasTailCall();
  return DAG.getNode(CallOpc, dl, MVT::Other, Ops);
}

std::array<EVT, 2> ReturnTypes = {{MVT::Other, MVT::Glue}};
Chain = DAG.getNode(CallOpc, dl, ReturnTypes, Ops);
DAG.addNoMergeSiteInfo(Chain.getNode(), CFlags.NoMerge);
Glue = Chain.getValue(1);

// When performing tail call optimization the callee pops its arguments off
// the stack. Account for this here so these bytes can be pushed back on in
// PPCFrameLowering::eliminateCallFramePseudoInstr.
int BytesCalleePops = (CFlags.CallConv == CallingConv::Fast &&
                       getTargetMachine().Options.GuaranteedTailCallOpt)
                          ? NumBytes
                          : 0;

Chain = DAG.getCALLSEQ_END(Chain, NumBytes, BytesCalleePops, Glue, dl);
Glue = Chain.getValue(1);

return LowerCallResult(Chain, Glue, CFlags.CallConv, CFlags.IsVarArg, Ins, dl,
                       DAG, InVals);
5653}

5655bool PPCTargetLowering::supportsTailCallFor(const CallBase *CB) const {
CallingConv::ID CalleeCC = CB->getCallingConv();
const Function *CallerFunc = CB->getCaller();
CallingConv::ID CallerCC = CallerFunc->getCallingConv();
const Function *CalleeFunc = CB->getCalledFunction();
if (!CalleeFunc)
  return false;
const GlobalValue *CalleeGV = dyn_cast<GlobalValue>(CalleeFunc);

SmallVector<ISD::OutputArg, 2> Outs;
SmallVector<ISD::InputArg, 2> Ins;

GetReturnInfo(CalleeCC, CalleeFunc->getReturnType(),
              CalleeFunc->getAttributes(), Outs, *this,
              CalleeFunc->getParent()->getDataLayout());

return isEligibleForTCO(CalleeGV, CalleeCC, CallerCC, CB,
                        CalleeFunc->isVarArg(), Outs, Ins, CallerFunc,
                        false /*isCalleeExternalSymbol*/);
5674}

5676bool PPCTargetLowering::isEligibleForTCO(
  const GlobalValue *CalleeGV, CallingConv::ID CalleeCC,
  CallingConv::ID CallerCC, const CallBase *CB, bool isVarArg,
  const SmallVectorImpl<ISD::OutputArg> &Outs,
  const SmallVectorImpl<ISD::InputArg> &Ins, const Function *CallerFunc,
  bool isCalleeExternalSymbol) const {
if (Subtarget.useLongCalls() && !(CB && CB->isMustTailCall()))
  return false;

if (Subtarget.isSVR4ABI() && Subtarget.isPPC64())
  return IsEligibleForTailCallOptimization_64SVR4(
      CalleeGV, CalleeCC, CallerCC, CB, isVarArg, Outs, Ins, CallerFunc,
      isCalleeExternalSymbol);
else
  return IsEligibleForTailCallOptimization(CalleeGV, CalleeCC, CallerCC,
                                           isVarArg, Ins);
5692}

5694SDValue
5695PPCTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
                           SmallVectorImpl<SDValue> &InVals) const {
SelectionDAG &DAG                     = CLI.DAG;
SDLoc &dl                             = CLI.DL;
SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
SmallVectorImpl<SDValue> &OutVals     = CLI.OutVals;
SmallVectorImpl<ISD::InputArg> &Ins   = CLI.Ins;
SDValue Chain                         = CLI.Chain;
SDValue Callee                        = CLI.Callee;
bool &isTailCall                      = CLI.IsTailCall;
CallingConv::ID CallConv              = CLI.CallConv;
bool isVarArg                         = CLI.IsVarArg;
bool isPatchPoint                     = CLI.IsPatchPoint;
const CallBase *CB                    = CLI.CB;

if (isTailCall) {
  MachineFunction &MF = DAG.getMachineFunction();
  CallingConv::ID CallerCC = MF.getFunction().getCallingConv();
  auto *G = dyn_cast<GlobalAddressSDNode>(Callee);
  const GlobalValue *GV = G ? G->getGlobal() : nullptr;
  bool IsCalleeExternalSymbol = isa<ExternalSymbolSDNode>(Callee);

  isTailCall =
      isEligibleForTCO(GV, CallConv, CallerCC, CB, isVarArg, Outs, Ins,
                       &(MF.getFunction()), IsCalleeExternalSymbol);
  if (isTailCall) {
    ++NumTailCalls;
    if (!getTargetMachine().Options.GuaranteedTailCallOpt)
      ++NumSiblingCalls;

    // PC Relative calls no longer guarantee that the callee is a Global
    // Address Node. The callee could be an indirect tail call in which
    // case the SDValue for the callee could be a load (to load the address
    // of a function pointer) or it may be a register copy (to move the
    // address of the callee from a function parameter into a virtual
    // register). It may also be an ExternalSymbolSDNode (ex memcopy).
    assert((Subtarget.isUsingPCRelativeCalls() ||(static_cast <bool> ((Subtarget.isUsingPCRelativeCalls(
) || isa<GlobalAddressSDNode>(Callee)) && "Callee should be an llvm::Function object."
) ? void (0) : __assert_fail ("(Subtarget.isUsingPCRelativeCalls() || isa<GlobalAddressSDNode>(Callee)) && \"Callee should be an llvm::Function object.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5733, __extension__
 __PRETTY_FUNCTION__))
            isa<GlobalAddressSDNode>(Callee)) &&(static_cast <bool> ((Subtarget.isUsingPCRelativeCalls(
) || isa<GlobalAddressSDNode>(Callee)) && "Callee should be an llvm::Function object."
) ? void (0) : __assert_fail ("(Subtarget.isUsingPCRelativeCalls() || isa<GlobalAddressSDNode>(Callee)) && \"Callee should be an llvm::Function object.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5733, __extension__
 __PRETTY_FUNCTION__))
           "Callee should be an llvm::Function object.")(static_cast <bool> ((Subtarget.isUsingPCRelativeCalls(
) || isa<GlobalAddressSDNode>(Callee)) && "Callee should be an llvm::Function object."
) ? void (0) : __assert_fail ("(Subtarget.isUsingPCRelativeCalls() || isa<GlobalAddressSDNode>(Callee)) && \"Callee should be an llvm::Function object.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5733, __extension__
 __PRETTY_FUNCTION__));

    LLVM_DEBUG(dbgs() << "TCO caller: " << DAG.getMachineFunction().getName()do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { dbgs() << "TCO caller: " << DAG
.getMachineFunction().getName() << "\nTCO callee: "; } }
 while (false)
                      << "\nTCO callee: ")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { dbgs() << "TCO caller: " << DAG
.getMachineFunction().getName() << "\nTCO callee: "; } }
 while (false);
    LLVM_DEBUG(Callee.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { Callee.dump(); } } while (false);
  }
}

if (!isTailCall && CB && CB->isMustTailCall())
  report_fatal_error("failed to perform tail call elimination on a call "
                     "site marked musttail");

// When long calls (i.e. indirect calls) are always used, calls are always
// made via function pointer. If we have a function name, first translate it
// into a pointer.
if (Subtarget.useLongCalls() && isa<GlobalAddressSDNode>(Callee) &&
    !isTailCall)
  Callee = LowerGlobalAddress(Callee, DAG);

CallFlags CFlags(
    CallConv, isTailCall, isVarArg, isPatchPoint,
    isIndirectCall(Callee, DAG, Subtarget, isPatchPoint),
    // hasNest
    Subtarget.is64BitELFABI() &&
        any_of(Outs, [](ISD::OutputArg Arg) { return Arg.Flags.isNest(); }),
    CLI.NoMerge);

if (Subtarget.isAIXABI())
  return LowerCall_AIX(Chain, Callee, CFlags, Outs, OutVals, Ins, dl, DAG,
                       InVals, CB);

assert(Subtarget.isSVR4ABI())(static_cast <bool> (Subtarget.isSVR4ABI()) ? void (0) :
 __assert_fail ("Subtarget.isSVR4ABI()", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5764, __extension__ __PRETTY_FUNCTION__));
if (Subtarget.isPPC64())
  return LowerCall_64SVR4(Chain, Callee, CFlags, Outs, OutVals, Ins, dl, DAG,
                          InVals, CB);
return LowerCall_32SVR4(Chain, Callee, CFlags, Outs, OutVals, Ins, dl, DAG,
                        InVals, CB);
5770}

5772SDValue PPCTargetLowering::LowerCall_32SVR4(
  SDValue Chain, SDValue Callee, CallFlags CFlags,
  const SmallVectorImpl<ISD::OutputArg> &Outs,
  const SmallVectorImpl<SDValue> &OutVals,
  const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
  SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals,
  const CallBase *CB) const {
// See PPCTargetLowering::LowerFormalArguments_32SVR4() for a description
// of the 32-bit SVR4 ABI stack frame layout.

const CallingConv::ID CallConv = CFlags.CallConv;
const bool IsVarArg = CFlags.IsVarArg;
const bool IsTailCall = CFlags.IsTailCall;

assert((CallConv == CallingConv::C ||(static_cast <bool> ((CallConv == CallingConv::C || CallConv
 == CallingConv::Cold || CallConv == CallingConv::Fast) &&
 "Unknown calling convention!") ? void (0) : __assert_fail ("(CallConv == CallingConv::C || CallConv == CallingConv::Cold || CallConv == CallingConv::Fast) && \"Unknown calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5788, __extension__
 __PRETTY_FUNCTION__))
        CallConv == CallingConv::Cold ||(static_cast <bool> ((CallConv == CallingConv::C || CallConv
 == CallingConv::Cold || CallConv == CallingConv::Fast) &&
 "Unknown calling convention!") ? void (0) : __assert_fail ("(CallConv == CallingConv::C || CallConv == CallingConv::Cold || CallConv == CallingConv::Fast) && \"Unknown calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5788, __extension__
 __PRETTY_FUNCTION__))
        CallConv == CallingConv::Fast) && "Unknown calling convention!")(static_cast <bool> ((CallConv == CallingConv::C || CallConv
 == CallingConv::Cold || CallConv == CallingConv::Fast) &&
 "Unknown calling convention!") ? void (0) : __assert_fail ("(CallConv == CallingConv::C || CallConv == CallingConv::Cold || CallConv == CallingConv::Fast) && \"Unknown calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5788, __extension__
 __PRETTY_FUNCTION__));

const Align PtrAlign(4);

MachineFunction &MF = DAG.getMachineFunction();

// Mark this function as potentially containing a function that contains a
// tail call. As a consequence the frame pointer will be used for dynamicalloc
// and restoring the callers stack pointer in this functions epilog. This is
// done because by tail calling the called function might overwrite the value
// in this function's (MF) stack pointer stack slot 0(SP).
if (getTargetMachine().Options.GuaranteedTailCallOpt &&
    CallConv == CallingConv::Fast)
  MF.getInfo<PPCFunctionInfo>()->setHasFastCall();

// Count how many bytes are to be pushed on the stack, including the linkage
// area, parameter list area and the part of the local variable space which
// contains copies of aggregates which are passed by value.

// Assign locations to all of the outgoing arguments.
SmallVector<CCValAssign, 16> ArgLocs;
PPCCCState CCInfo(CallConv, IsVarArg, MF, ArgLocs, *DAG.getContext());

// Reserve space for the linkage area on the stack.
CCInfo.AllocateStack(Subtarget.getFrameLowering()->getLinkageSize(),
                     PtrAlign);
if (useSoftFloat())
  CCInfo.PreAnalyzeCallOperands(Outs);

if (IsVarArg) {
  // Handle fixed and variable vector arguments differently.
  // Fixed vector arguments go into registers as long as registers are
  // available. Variable vector arguments always go into memory.
  unsigned NumArgs = Outs.size();

  for (unsigned i = 0; i != NumArgs; ++i) {
    MVT ArgVT = Outs[i].VT;
    ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
    bool Result;

    if (Outs[i].IsFixed) {
      Result = CC_PPC32_SVR4(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags,
                             CCInfo);
    } else {
      Result = CC_PPC32_SVR4_VarArg(i, ArgVT, ArgVT, CCValAssign::Full,
                                    ArgFlags, CCInfo);
    }

    if (Result) {
5837#ifndef NDEBUG
      errs() << "Call operand #" << i << " has unhandled type "
             << ArgVT << "\n";
5840#endif
      llvm_unreachable(nullptr)::llvm::llvm_unreachable_internal(nullptr, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5841);
    }
  }
} else {
  // All arguments are treated the same.
  CCInfo.AnalyzeCallOperands(Outs, CC_PPC32_SVR4);
}
CCInfo.clearWasPPCF128();

// Assign locations to all of the outgoing aggregate by value arguments.
SmallVector<CCValAssign, 16> ByValArgLocs;
CCState CCByValInfo(CallConv, IsVarArg, MF, ByValArgLocs, *DAG.getContext());

// Reserve stack space for the allocations in CCInfo.
CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrAlign);

CCByValInfo.AnalyzeCallOperands(Outs, CC_PPC32_SVR4_ByVal);

// Size of the linkage area, parameter list area and the part of the local
// space variable where copies of aggregates which are passed by value are
// stored.
unsigned NumBytes = CCByValInfo.getNextStackOffset();

// Calculate by how many bytes the stack has to be adjusted in case of tail
// call optimization.
int SPDiff = CalculateTailCallSPDiff(DAG, IsTailCall, NumBytes);

// Adjust the stack pointer for the new arguments...
// These operations are automatically eliminated by the prolog/epilog pass
Chain = DAG.getCALLSEQ_START(Chain, NumBytes, 0, dl);
SDValue CallSeqStart = Chain;

// Load the return address and frame pointer so it can be moved somewhere else
// later.
SDValue LROp, FPOp;
Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, dl);

// Set up a copy of the stack pointer for use loading and storing any
// arguments that may not fit in the registers available for argument
// passing.
SDValue StackPtr = DAG.getRegister(PPC::R1, MVT::i32);

SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
SmallVector<SDValue, 8> MemOpChains;

bool seenFloatArg = false;
// Walk the register/memloc assignments, inserting copies/loads.
// i - Tracks the index into the list of registers allocated for the call
// RealArgIdx - Tracks the index into the list of actual function arguments
// j - Tracks the index into the list of byval arguments
for (unsigned i = 0, RealArgIdx = 0, j = 0, e = ArgLocs.size();
     i != e;
     ++i, ++RealArgIdx) {
  CCValAssign &VA = ArgLocs[i];
  SDValue Arg = OutVals[RealArgIdx];
  ISD::ArgFlagsTy Flags = Outs[RealArgIdx].Flags;

  if (Flags.isByVal()) {
    // Argument is an aggregate which is passed by value, thus we need to
    // create a copy of it in the local variable space of the current stack
    // frame (which is the stack frame of the caller) and pass the address of
    // this copy to the callee.
    assert((j < ByValArgLocs.size()) && "Index out of bounds!")(static_cast <bool> ((j < ByValArgLocs.size()) &&
 "Index out of bounds!") ? void (0) : __assert_fail ("(j < ByValArgLocs.size()) && \"Index out of bounds!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5904, __extension__
 __PRETTY_FUNCTION__));
    CCValAssign &ByValVA = ByValArgLocs[j++];
    assert((VA.getValNo() == ByValVA.getValNo()) && "ValNo mismatch!")(static_cast <bool> ((VA.getValNo() == ByValVA.getValNo
()) && "ValNo mismatch!") ? void (0) : __assert_fail (
"(VA.getValNo() == ByValVA.getValNo()) && \"ValNo mismatch!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 5906, __extension__
 __PRETTY_FUNCTION__));

    // Memory reserved in the local variable space of the callers stack frame.
    unsigned LocMemOffset = ByValVA.getLocMemOffset();

    SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl);
    PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(MF.getDataLayout()),
                         StackPtr, PtrOff);

    // Create a copy of the argument in the local area of the current
    // stack frame.
    SDValue MemcpyCall =
      CreateCopyOfByValArgument(Arg, PtrOff,
                                CallSeqStart.getNode()->getOperand(0),
                                Flags, DAG, dl);

    // This must go outside the CALLSEQ_START..END.
    SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall, NumBytes, 0,
                                                   SDLoc(MemcpyCall));
    DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
                           NewCallSeqStart.getNode());
    Chain = CallSeqStart = NewCallSeqStart;

    // Pass the address of the aggregate copy on the stack either in a
    // physical register or in the parameter list area of the current stack
    // frame to the callee.
    Arg = PtrOff;
  }

  // When useCRBits() is true, there can be i1 arguments.
  // It is because getRegisterType(MVT::i1) => MVT::i1,
  // and for other integer types getRegisterType() => MVT::i32.
  // Extend i1 and ensure callee will get i32.
  if (Arg.getValueType() == MVT::i1)
    Arg = DAG.getNode(Flags.isSExt() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
                      dl, MVT::i32, Arg);

  if (VA.isRegLoc()) {
    seenFloatArg |= VA.getLocVT().isFloatingPoint();
    // Put argument in a physical register.
    if (Subtarget.hasSPE() && Arg.getValueType() == MVT::f64) {
      bool IsLE = Subtarget.isLittleEndian();
      SDValue SVal = DAG.getNode(PPCISD::EXTRACT_SPE, dl, MVT::i32, Arg,
                      DAG.getIntPtrConstant(IsLE ? 0 : 1, dl));
      RegsToPass.push_back(std::make_pair(VA.getLocReg(), SVal.getValue(0)));
      SVal = DAG.getNode(PPCISD::EXTRACT_SPE, dl, MVT::i32, Arg,
                         DAG.getIntPtrConstant(IsLE ? 1 : 0, dl));
      RegsToPass.push_back(std::make_pair(ArgLocs[++i].getLocReg(),
                           SVal.getValue(0)));
    } else
      RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
  } else {
    // Put argument in the parameter list area of the current stack frame.
    assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail
 ("VA.isMemLoc()", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5959, __extension__ __PRETTY_FUNCTION__));
    unsigned LocMemOffset = VA.getLocMemOffset();

    if (!IsTailCall) {
      SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl);
      PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(MF.getDataLayout()),
                           StackPtr, PtrOff);

      MemOpChains.push_back(
          DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo()));
    } else {
      // Calculate and remember argument location.
      CalculateTailCallArgDest(DAG, MF, false, Arg, SPDiff, LocMemOffset,
                               TailCallArguments);
    }
  }
}

if (!MemOpChains.empty())
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);

// Build a sequence of copy-to-reg nodes chained together with token chain
// and flag operands which copy the outgoing args into the appropriate regs.
SDValue InGlue;
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
  Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
                           RegsToPass[i].second, InGlue);
  InGlue = Chain.getValue(1);
}

// Set CR bit 6 to true if this is a vararg call with floating args passed in
// registers.
if (IsVarArg) {
  SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue);
  SDValue Ops[] = { Chain, InGlue };

  Chain = DAG.getNode(seenFloatArg ? PPCISD::CR6SET : PPCISD::CR6UNSET, dl,
                      VTs, ArrayRef(Ops, InGlue.getNode() ? 2 : 1));

  InGlue = Chain.getValue(1);
}

if (IsTailCall)
  PrepareTailCall(DAG, InGlue, Chain, dl, SPDiff, NumBytes, LROp, FPOp,
                  TailCallArguments);

return FinishCall(CFlags, dl, DAG, RegsToPass, InGlue, Chain, CallSeqStart,
                  Callee, SPDiff, NumBytes, Ins, InVals, CB);
6007}

6009// Copy an argument into memory, being careful to do this outside the
6010// call sequence for the call to which the argument belongs.
6011SDValue PPCTargetLowering::createMemcpyOutsideCallSeq(
  SDValue Arg, SDValue PtrOff, SDValue CallSeqStart, ISD::ArgFlagsTy Flags,
  SelectionDAG &DAG, const SDLoc &dl) const {
SDValue MemcpyCall = CreateCopyOfByValArgument(Arg, PtrOff,
                      CallSeqStart.getNode()->getOperand(0),
                      Flags, DAG, dl);
// The MEMCPY must go outside the CALLSEQ_START..END.
int64_t FrameSize = CallSeqStart.getConstantOperandVal(1);
SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall, FrameSize, 0,
                                               SDLoc(MemcpyCall));
DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
                       NewCallSeqStart.getNode());
return NewCallSeqStart;
6024}

6026SDValue PPCTargetLowering::LowerCall_64SVR4(
  SDValue Chain, SDValue Callee, CallFlags CFlags,
  const SmallVectorImpl<ISD::OutputArg> &Outs,
  const SmallVectorImpl<SDValue> &OutVals,
  const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
  SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals,
  const CallBase *CB) const {
bool isELFv2ABI = Subtarget.isELFv2ABI();
bool isLittleEndian = Subtarget.isLittleEndian();
unsigned NumOps = Outs.size();
bool IsSibCall = false;
bool IsFastCall = CFlags.CallConv == CallingConv::Fast;

EVT PtrVT = getPointerTy(DAG.getDataLayout());
unsigned PtrByteSize = 8;

MachineFunction &MF = DAG.getMachineFunction();

if (CFlags.IsTailCall && !getTargetMachine().Options.GuaranteedTailCallOpt)
  IsSibCall = true;

// Mark this function as potentially containing a function that contains a
// tail call. As a consequence the frame pointer will be used for dynamicalloc
// and restoring the callers stack pointer in this functions epilog. This is
// done because by tail calling the called function might overwrite the value
// in this function's (MF) stack pointer stack slot 0(SP).
if (getTargetMachine().Options.GuaranteedTailCallOpt && IsFastCall)
  MF.getInfo<PPCFunctionInfo>()->setHasFastCall();

assert(!(IsFastCall && CFlags.IsVarArg) &&(static_cast <bool> (!(IsFastCall && CFlags.IsVarArg
) && "fastcc not supported on varargs functions") ? void
 (0) : __assert_fail ("!(IsFastCall && CFlags.IsVarArg) && \"fastcc not supported on varargs functions\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6056, __extension__
 __PRETTY_FUNCTION__))
       "fastcc not supported on varargs functions")(static_cast <bool> (!(IsFastCall && CFlags.IsVarArg
) && "fastcc not supported on varargs functions") ? void
 (0) : __assert_fail ("!(IsFastCall && CFlags.IsVarArg) && \"fastcc not supported on varargs functions\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6056, __extension__
 __PRETTY_FUNCTION__));

// Count how many bytes are to be pushed on the stack, including the linkage
// area, and parameter passing area.  On ELFv1, the linkage area is 48 bytes
// reserved space for [SP][CR][LR][2 x unused][TOC]; on ELFv2, the linkage
// area is 32 bytes reserved space for [SP][CR][LR][TOC].
unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
unsigned NumBytes = LinkageSize;
unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;

static const MCPhysReg GPR[] = {
  PPC::X3, PPC::X4, PPC::X5, PPC::X6,
  PPC::X7, PPC::X8, PPC::X9, PPC::X10,
};
static const MCPhysReg VR[] = {
  PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
  PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
};

const unsigned NumGPRs = std::size(GPR);
const unsigned NumFPRs = useSoftFloat() ? 0 : 13;
const unsigned NumVRs = std::size(VR);

// On ELFv2, we can avoid allocating the parameter area if all the arguments
// can be passed to the callee in registers.
// For the fast calling convention, there is another check below.
// Note: We should keep consistent with LowerFormalArguments_64SVR4()
bool HasParameterArea = !isELFv2ABI || CFlags.IsVarArg || IsFastCall;
if (!HasParameterArea) {
  unsigned ParamAreaSize = NumGPRs * PtrByteSize;
  unsigned AvailableFPRs = NumFPRs;
  unsigned AvailableVRs = NumVRs;
  unsigned NumBytesTmp = NumBytes;
  for (unsigned i = 0; i != NumOps; ++i) {
    if (Outs[i].Flags.isNest()) continue;
    if (CalculateStackSlotUsed(Outs[i].VT, Outs[i].ArgVT, Outs[i].Flags,
                               PtrByteSize, LinkageSize, ParamAreaSize,
                               NumBytesTmp, AvailableFPRs, AvailableVRs))
      HasParameterArea = true;
  }
}

// When using the fast calling convention, we don't provide backing for
// arguments that will be in registers.
unsigned NumGPRsUsed = 0, NumFPRsUsed = 0, NumVRsUsed = 0;

// Avoid allocating parameter area for fastcc functions if all the arguments
// can be passed in the registers.
if (IsFastCall)
  HasParameterArea = false;

// Add up all the space actually used.
for (unsigned i = 0; i != NumOps; ++i) {
  ISD::ArgFlagsTy Flags = Outs[i].Flags;
  EVT ArgVT = Outs[i].VT;
  EVT OrigVT = Outs[i].ArgVT;

  if (Flags.isNest())
    continue;

  if (IsFastCall) {
    if (Flags.isByVal()) {
      NumGPRsUsed += (Flags.getByValSize()+7)/8;
      if (NumGPRsUsed > NumGPRs)
        HasParameterArea = true;
    } else {
      switch (ArgVT.getSimpleVT().SimpleTy) {
      default: llvm_unreachable("Unexpected ValueType for argument!")::llvm::llvm_unreachable_internal("Unexpected ValueType for argument!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6123);
      case MVT::i1:
      case MVT::i32:
      case MVT::i64:
        if (++NumGPRsUsed <= NumGPRs)
          continue;
        break;
      case MVT::v4i32:
      case MVT::v8i16:
      case MVT::v16i8:
      case MVT::v2f64:
      case MVT::v2i64:
      case MVT::v1i128:
      case MVT::f128:
        if (++NumVRsUsed <= NumVRs)
          continue;
        break;
      case MVT::v4f32:
        if (++NumVRsUsed <= NumVRs)
          continue;
        break;
      case MVT::f32:
      case MVT::f64:
        if (++NumFPRsUsed <= NumFPRs)
          continue;
        break;
      }
      HasParameterArea = true;
    }
  }

  /* Respect alignment of argument on the stack.  */
  auto Alignement =
      CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
  NumBytes = alignTo(NumBytes, Alignement);

  NumBytes += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
  if (Flags.isInConsecutiveRegsLast())
    NumBytes = ((NumBytes + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
}

unsigned NumBytesActuallyUsed = NumBytes;

// In the old ELFv1 ABI,
// the prolog code of the callee may store up to 8 GPR argument registers to
// the stack, allowing va_start to index over them in memory if its varargs.
// Because we cannot tell if this is needed on the caller side, we have to
// conservatively assume that it is needed.  As such, make sure we have at
// least enough stack space for the caller to store the 8 GPRs.
// In the ELFv2 ABI, we allocate the parameter area iff a callee
// really requires memory operands, e.g. a vararg function.
if (HasParameterArea)
  NumBytes = std::max(NumBytes, LinkageSize + 8 * PtrByteSize);
else
  NumBytes = LinkageSize;

// Tail call needs the stack to be aligned.
if (getTargetMachine().Options.GuaranteedTailCallOpt && IsFastCall)
  NumBytes = EnsureStackAlignment(Subtarget.getFrameLowering(), NumBytes);

int SPDiff = 0;

// Calculate by how many bytes the stack has to be adjusted in case of tail
// call optimization.
if (!IsSibCall)
  SPDiff = CalculateTailCallSPDiff(DAG, CFlags.IsTailCall, NumBytes);

// To protect arguments on the stack from being clobbered in a tail call,
// force all the loads to happen before doing any other lowering.
if (CFlags.IsTailCall)
  Chain = DAG.getStackArgumentTokenFactor(Chain);

// Adjust the stack pointer for the new arguments...
// These operations are automatically eliminated by the prolog/epilog pass
if (!IsSibCall)
  Chain = DAG.getCALLSEQ_START(Chain, NumBytes, 0, dl);
SDValue CallSeqStart = Chain;

// Load the return address and frame pointer so it can be move somewhere else
// later.
SDValue LROp, FPOp;
Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, dl);

// Set up a copy of the stack pointer for use loading and storing any
// arguments that may not fit in the registers available for argument
// passing.
SDValue StackPtr = DAG.getRegister(PPC::X1, MVT::i64);

// Figure out which arguments are going to go in registers, and which in
// memory.  Also, if this is a vararg function, floating point operations
// must be stored to our stack, and loaded into integer regs as well, if
// any integer regs are available for argument passing.
unsigned ArgOffset = LinkageSize;

SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
SmallVector<TailCallArgumentInfo, 8> TailCallArguments;

SmallVector<SDValue, 8> MemOpChains;
for (unsigned i = 0; i != NumOps; ++i) {
  SDValue Arg = OutVals[i];
  ISD::ArgFlagsTy Flags = Outs[i].Flags;
  EVT ArgVT = Outs[i].VT;
  EVT OrigVT = Outs[i].ArgVT;

  // PtrOff will be used to store the current argument to the stack if a
  // register cannot be found for it.
  SDValue PtrOff;

  // We re-align the argument offset for each argument, except when using the
  // fast calling convention, when we need to make sure we do that only when
  // we'll actually use a stack slot.
  auto ComputePtrOff = [&]() {
    /* Respect alignment of argument on the stack.  */
    auto Alignment =
        CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
    ArgOffset = alignTo(ArgOffset, Alignment);

    PtrOff = DAG.getConstant(ArgOffset, dl, StackPtr.getValueType());

    PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
  };

  if (!IsFastCall) {
    ComputePtrOff();

    /* Compute GPR index associated with argument offset.  */
    GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
    GPR_idx = std::min(GPR_idx, NumGPRs);
  }

  // Promote integers to 64-bit values.
  if (Arg.getValueType() == MVT::i32 || Arg.getValueType() == MVT::i1) {
    // FIXME: Should this use ANY_EXTEND if neither sext nor zext?
    unsigned ExtOp = Flags.isSExt() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
    Arg = DAG.getNode(ExtOp, dl, MVT::i64, Arg);
  }

  // FIXME memcpy is used way more than necessary.  Correctness first.
  // Note: "by value" is code for passing a structure by value, not
  // basic types.
  if (Flags.isByVal()) {
    // Note: Size includes alignment padding, so
    //   struct x { short a; char b; }
    // will have Size = 4.  With #pragma pack(1), it will have Size = 3.
    // These are the proper values we need for right-justifying the
    // aggregate in a parameter register.
    unsigned Size = Flags.getByValSize();

    // An empty aggregate parameter takes up no storage and no
    // registers.
    if (Size == 0)
      continue;

    if (IsFastCall)
      ComputePtrOff();

    // All aggregates smaller than 8 bytes must be passed right-justified.
    if (Size==1 || Size==2 || Size==4) {
      EVT VT = (Size==1) ? MVT::i8 : ((Size==2) ? MVT::i16 : MVT::i32);
      if (GPR_idx != NumGPRs) {
        SDValue Load = DAG.getExtLoad(ISD::EXTLOAD, dl, PtrVT, Chain, Arg,
                                      MachinePointerInfo(), VT);
        MemOpChains.push_back(Load.getValue(1));
        RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));

        ArgOffset += PtrByteSize;
        continue;
      }
    }

    if (GPR_idx == NumGPRs && Size < 8) {
      SDValue AddPtr = PtrOff;
      if (!isLittleEndian) {
        SDValue Const = DAG.getConstant(PtrByteSize - Size, dl,
                                        PtrOff.getValueType());
        AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
      }
      Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, AddPtr,
                                                        CallSeqStart,
                                                        Flags, DAG, dl);
      ArgOffset += PtrByteSize;
      continue;
    }
    // Copy the object to parameter save area if it can not be entirely passed 
    // by registers.
    // FIXME: we only need to copy the parts which need to be passed in
    // parameter save area. For the parts passed by registers, we don't need
    // to copy them to the stack although we need to allocate space for them
    // in parameter save area.
    if ((NumGPRs - GPR_idx) * PtrByteSize < Size)
      Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, PtrOff,
                                                        CallSeqStart,
                                                        Flags, DAG, dl);

    // When a register is available, pass a small aggregate right-justified.
    if (Size < 8 && GPR_idx != NumGPRs) {
      // The easiest way to get this right-justified in a register
      // is to copy the structure into the rightmost portion of a
      // local variable slot, then load the whole slot into the
      // register.
      // FIXME: The memcpy seems to produce pretty awful code for
      // small aggregates, particularly for packed ones.
      // FIXME: It would be preferable to use the slot in the
      // parameter save area instead of a new local variable.
      SDValue AddPtr = PtrOff;
      if (!isLittleEndian) {
        SDValue Const = DAG.getConstant(8 - Size, dl, PtrOff.getValueType());
        AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
      }
      Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, AddPtr,
                                                        CallSeqStart,
                                                        Flags, DAG, dl);

      // Load the slot into the register.
      SDValue Load =
          DAG.getLoad(PtrVT, dl, Chain, PtrOff, MachinePointerInfo());
      MemOpChains.push_back(Load.getValue(1));
      RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));

      // Done with this argument.
      ArgOffset += PtrByteSize;
      continue;
    }

    // For aggregates larger than PtrByteSize, copy the pieces of the
    // object that fit into registers from the parameter save area.
    for (unsigned j=0; j<Size; j+=PtrByteSize) {
      SDValue Const = DAG.getConstant(j, dl, PtrOff.getValueType());
      SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
      if (GPR_idx != NumGPRs) {
        unsigned LoadSizeInBits = std::min(PtrByteSize, (Size - j)) * 8;
        EVT ObjType = EVT::getIntegerVT(*DAG.getContext(), LoadSizeInBits);
        SDValue Load = DAG.getExtLoad(ISD::EXTLOAD, dl, PtrVT, Chain, AddArg,
                                      MachinePointerInfo(), ObjType);

        MemOpChains.push_back(Load.getValue(1));
        RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
        ArgOffset += PtrByteSize;
      } else {
        ArgOffset += ((Size - j + PtrByteSize-1)/PtrByteSize)*PtrByteSize;
        break;
      }
    }
    continue;
  }

  switch (Arg.getSimpleValueType().SimpleTy) {
  default: llvm_unreachable("Unexpected ValueType for argument!")::llvm::llvm_unreachable_internal("Unexpected ValueType for argument!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6370);
  case MVT::i1:
  case MVT::i32:
  case MVT::i64:
    if (Flags.isNest()) {
      // The 'nest' parameter, if any, is passed in R11.
      RegsToPass.push_back(std::make_pair(PPC::X11, Arg));
      break;
    }

    // These can be scalar arguments or elements of an integer array type
    // passed directly.  Clang may use those instead of "byval" aggregate
    // types to avoid forcing arguments to memory unnecessarily.
    if (GPR_idx != NumGPRs) {
      RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Arg));
    } else {
      if (IsFastCall)
        ComputePtrOff();

      assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6390, __extension__
 __PRETTY_FUNCTION__))
             "Parameter area must exist to pass an argument in memory.")(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6390, __extension__
 __PRETTY_FUNCTION__));
      LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
                       true, CFlags.IsTailCall, false, MemOpChains,
                       TailCallArguments, dl);
      if (IsFastCall)
        ArgOffset += PtrByteSize;
    }
    if (!IsFastCall)
      ArgOffset += PtrByteSize;
    break;
  case MVT::f32:
  case MVT::f64: {
    // These can be scalar arguments or elements of a float array type
    // passed directly.  The latter are used to implement ELFv2 homogenous
    // float aggregates.

    // Named arguments go into FPRs first, and once they overflow, the
    // remaining arguments go into GPRs and then the parameter save area.
    // Unnamed arguments for vararg functions always go to GPRs and
    // then the parameter save area.  For now, put all arguments to vararg
    // routines always in both locations (FPR *and* GPR or stack slot).
    bool NeedGPROrStack = CFlags.IsVarArg || FPR_idx == NumFPRs;
    bool NeededLoad = false;

    // First load the argument into the next available FPR.
    if (FPR_idx != NumFPRs)
      RegsToPass.push_back(std::make_pair(FPR[FPR_idx++], Arg));

    // Next, load the argument into GPR or stack slot if needed.
    if (!NeedGPROrStack)
      ;
    else if (GPR_idx != NumGPRs && !IsFastCall) {
      // FIXME: We may want to re-enable this for CallingConv::Fast on the P8
      // once we support fp <-> gpr moves.

      // In the non-vararg case, this can only ever happen in the
      // presence of f32 array types, since otherwise we never run
      // out of FPRs before running out of GPRs.
      SDValue ArgVal;

      // Double values are always passed in a single GPR.
      if (Arg.getValueType() != MVT::f32) {
        ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);

      // Non-array float values are extended and passed in a GPR.
      } else if (!Flags.isInConsecutiveRegs()) {
        ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
        ArgVal = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i64, ArgVal);

      // If we have an array of floats, we collect every odd element
      // together with its predecessor into one GPR.
      } else if (ArgOffset % PtrByteSize != 0) {
        SDValue Lo, Hi;
        Lo = DAG.getNode(ISD::BITCAST, dl, MVT::i32, OutVals[i - 1]);
        Hi = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
        if (!isLittleEndian)
          std::swap(Lo, Hi);
        ArgVal = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);

      // The final element, if even, goes into the first half of a GPR.
      } else if (Flags.isInConsecutiveRegsLast()) {
        ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
        ArgVal = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i64, ArgVal);
        if (!isLittleEndian)
          ArgVal = DAG.getNode(ISD::SHL, dl, MVT::i64, ArgVal,
                               DAG.getConstant(32, dl, MVT::i32));

      // Non-final even elements are skipped; they will be handled
      // together the with subsequent argument on the next go-around.
      } else
        ArgVal = SDValue();

      if (ArgVal.getNode())
        RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], ArgVal));
    } else {
      if (IsFastCall)
        ComputePtrOff();

      // Single-precision floating-point values are mapped to the
      // second (rightmost) word of the stack doubleword.
      if (Arg.getValueType() == MVT::f32 &&
          !isLittleEndian && !Flags.isInConsecutiveRegs()) {
        SDValue ConstFour = DAG.getConstant(4, dl, PtrOff.getValueType());
        PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, ConstFour);
      }

      assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6477, __extension__
 __PRETTY_FUNCTION__))
             "Parameter area must exist to pass an argument in memory.")(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6477, __extension__
 __PRETTY_FUNCTION__));
      LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
                       true, CFlags.IsTailCall, false, MemOpChains,
                       TailCallArguments, dl);

      NeededLoad = true;
    }
    // When passing an array of floats, the array occupies consecutive
    // space in the argument area; only round up to the next doubleword
    // at the end of the array.  Otherwise, each float takes 8 bytes.
    if (!IsFastCall || NeededLoad) {
      ArgOffset += (Arg.getValueType() == MVT::f32 &&
                    Flags.isInConsecutiveRegs()) ? 4 : 8;
      if (Flags.isInConsecutiveRegsLast())
        ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
    }
    break;
  }
  case MVT::v4f32:
  case MVT::v4i32:
  case MVT::v8i16:
  case MVT::v16i8:
  case MVT::v2f64:
  case MVT::v2i64:
  case MVT::v1i128:
  case MVT::f128:
    // These can be scalar arguments or elements of a vector array type
    // passed directly.  The latter are used to implement ELFv2 homogenous
    // vector aggregates.

    // For a varargs call, named arguments go into VRs or on the stack as
    // usual; unnamed arguments always go to the stack or the corresponding
    // GPRs when within range.  For now, we always put the value in both
    // locations (or even all three).
    if (CFlags.IsVarArg) {
      assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist if we have a varargs call."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist if we have a varargs call.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6513, __extension__
 __PRETTY_FUNCTION__))
             "Parameter area must exist if we have a varargs call.")(static_cast <bool> (HasParameterArea && "Parameter area must exist if we have a varargs call."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist if we have a varargs call.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6513, __extension__
 __PRETTY_FUNCTION__));
      // We could elide this store in the case where the object fits
      // entirely in R registers.  Maybe later.
      SDValue Store =
          DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo());
      MemOpChains.push_back(Store);
      if (VR_idx != NumVRs) {
        SDValue Load =
            DAG.getLoad(MVT::v4f32, dl, Store, PtrOff, MachinePointerInfo());
        MemOpChains.push_back(Load.getValue(1));
        RegsToPass.push_back(std::make_pair(VR[VR_idx++], Load));
      }
      ArgOffset += 16;
      for (unsigned i=0; i<16; i+=PtrByteSize) {
        if (GPR_idx == NumGPRs)
          break;
        SDValue Ix = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff,
                                 DAG.getConstant(i, dl, PtrVT));
        SDValue Load =
            DAG.getLoad(PtrVT, dl, Store, Ix, MachinePointerInfo());
        MemOpChains.push_back(Load.getValue(1));
        RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
      }
      break;
    }

    // Non-varargs Altivec params go into VRs or on the stack.
    if (VR_idx != NumVRs) {
      RegsToPass.push_back(std::make_pair(VR[VR_idx++], Arg));
    } else {
      if (IsFastCall)
        ComputePtrOff();

      assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6547, __extension__
 __PRETTY_FUNCTION__))
             "Parameter area must exist to pass an argument in memory.")(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6547, __extension__
 __PRETTY_FUNCTION__));
      LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
                       true, CFlags.IsTailCall, true, MemOpChains,
                       TailCallArguments, dl);
      if (IsFastCall)
        ArgOffset += 16;
    }

    if (!IsFastCall)
      ArgOffset += 16;
    break;
  }
}

assert((!HasParameterArea || NumBytesActuallyUsed == ArgOffset) &&(static_cast <bool> ((!HasParameterArea || NumBytesActuallyUsed
 == ArgOffset) && "mismatch in size of parameter area"
) ? void (0) : __assert_fail ("(!HasParameterArea || NumBytesActuallyUsed == ArgOffset) && \"mismatch in size of parameter area\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6562, __extension__
 __PRETTY_FUNCTION__))
       "mismatch in size of parameter area")(static_cast <bool> ((!HasParameterArea || NumBytesActuallyUsed
 == ArgOffset) && "mismatch in size of parameter area"
) ? void (0) : __assert_fail ("(!HasParameterArea || NumBytesActuallyUsed == ArgOffset) && \"mismatch in size of parameter area\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6562, __extension__
 __PRETTY_FUNCTION__));
(void)NumBytesActuallyUsed;

if (!MemOpChains.empty())
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);

// Check if this is an indirect call (MTCTR/BCTRL).
// See prepareDescriptorIndirectCall and buildCallOperands for more
// information about calls through function pointers in the 64-bit SVR4 ABI.
if (CFlags.IsIndirect) {
  // For 64-bit ELFv2 ABI with PCRel, do not save the TOC of the
  // caller in the TOC save area.
  if (isTOCSaveRestoreRequired(Subtarget)) {
    assert(!CFlags.IsTailCall && "Indirect tails calls not supported")(static_cast <bool> (!CFlags.IsTailCall && "Indirect tails calls not supported"
) ? void (0) : __assert_fail ("!CFlags.IsTailCall && \"Indirect tails calls not supported\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6575, __extension__
 __PRETTY_FUNCTION__));
    // Load r2 into a virtual register and store it to the TOC save area.
    setUsesTOCBasePtr(DAG);
    SDValue Val = DAG.getCopyFromReg(Chain, dl, PPC::X2, MVT::i64);
    // TOC save area offset.
    unsigned TOCSaveOffset = Subtarget.getFrameLowering()->getTOCSaveOffset();
    SDValue PtrOff = DAG.getIntPtrConstant(TOCSaveOffset, dl);
    SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
    Chain = DAG.getStore(Val.getValue(1), dl, Val, AddPtr,
                         MachinePointerInfo::getStack(
                             DAG.getMachineFunction(), TOCSaveOffset));
  }
  // In the ELFv2 ABI, R12 must contain the address of an indirect callee.
  // This does not mean the MTCTR instruction must use R12; it's easier
  // to model this as an extra parameter, so do that.
  if (isELFv2ABI && !CFlags.IsPatchPoint)
    RegsToPass.push_back(std::make_pair((unsigned)PPC::X12, Callee));
}

// Build a sequence of copy-to-reg nodes chained together with token chain
// and flag operands which copy the outgoing args into the appropriate regs.
SDValue InGlue;
for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
  Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
                           RegsToPass[i].second, InGlue);
  InGlue = Chain.getValue(1);
}

if (CFlags.IsTailCall && !IsSibCall)
  PrepareTailCall(DAG, InGlue, Chain, dl, SPDiff, NumBytes, LROp, FPOp,
                  TailCallArguments);

return FinishCall(CFlags, dl, DAG, RegsToPass, InGlue, Chain, CallSeqStart,
                  Callee, SPDiff, NumBytes, Ins, InVals, CB);
6609}

6611// Returns true when the shadow of a general purpose argument register
6612// in the parameter save area is aligned to at least 'RequiredAlign'.
6613static bool isGPRShadowAligned(MCPhysReg Reg, Align RequiredAlign) {
assert(RequiredAlign.value() <= 16 &&(static_cast <bool> (RequiredAlign.value() <= 16 &&
 "Required alignment greater than stack alignment.") ? void (
0) : __assert_fail ("RequiredAlign.value() <= 16 && \"Required alignment greater than stack alignment.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6615, __extension__
 __PRETTY_FUNCTION__))
       "Required alignment greater than stack alignment.")(static_cast <bool> (RequiredAlign.value() <= 16 &&
 "Required alignment greater than stack alignment.") ? void (
0) : __assert_fail ("RequiredAlign.value() <= 16 && \"Required alignment greater than stack alignment.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6615, __extension__
 __PRETTY_FUNCTION__));
switch (Reg) {
default:
  report_fatal_error("called on invalid register.");
case PPC::R5:
case PPC::R9:
case PPC::X3:
case PPC::X5:
case PPC::X7:
case PPC::X9:
  // These registers are 16 byte aligned which is the most strict aligment
  // we can support.
  return true;
case PPC::R3:
case PPC::R7:
case PPC::X4:
case PPC::X6:
case PPC::X8:
case PPC::X10:
  // The shadow of these registers in the PSA is 8 byte aligned.
  return RequiredAlign <= 8;
case PPC::R4:
case PPC::R6:
case PPC::R8:
case PPC::R10:
  return RequiredAlign <= 4;
}
6642}

6644static bool CC_AIX(unsigned ValNo, MVT ValVT, MVT LocVT,
                 CCValAssign::LocInfo LocInfo, ISD::ArgFlagsTy ArgFlags,
                 CCState &S) {
AIXCCState &State = static_cast<AIXCCState &>(S);
const PPCSubtarget &Subtarget = static_cast<const PPCSubtarget &>(
    State.getMachineFunction().getSubtarget());
const bool IsPPC64 = Subtarget.isPPC64();
const Align PtrAlign = IsPPC64 ? Align(8) : Align(4);
const MVT RegVT = IsPPC64 ? MVT::i64 : MVT::i32;

if (ValVT == MVT::f128)
  report_fatal_error("f128 is unimplemented on AIX.");

if (ArgFlags.isNest())
  report_fatal_error("Nest arguments are unimplemented.");

static const MCPhysReg GPR_32[] = {// 32-bit registers.
                                   PPC::R3, PPC::R4, PPC::R5, PPC::R6,
                                   PPC::R7, PPC::R8, PPC::R9, PPC::R10};
static const MCPhysReg GPR_64[] = {// 64-bit registers.
                                   PPC::X3, PPC::X4, PPC::X5, PPC::X6,
                                   PPC::X7, PPC::X8, PPC::X9, PPC::X10};

static const MCPhysReg VR[] = {// Vector registers.
                               PPC::V2,  PPC::V3,  PPC::V4,  PPC::V5,
                               PPC::V6,  PPC::V7,  PPC::V8,  PPC::V9,
                               PPC::V10, PPC::V11, PPC::V12, PPC::V13};

if (ArgFlags.isByVal()) {
  if (ArgFlags.getNonZeroByValAlign() > PtrAlign)
    report_fatal_error("Pass-by-value arguments with alignment greater than "
                       "register width are not supported.");

  const unsigned ByValSize = ArgFlags.getByValSize();

  // An empty aggregate parameter takes up no storage and no registers,
  // but needs a MemLoc for a stack slot for the formal arguments side.
  if (ByValSize == 0) {
    State.addLoc(CCValAssign::getMem(ValNo, MVT::INVALID_SIMPLE_VALUE_TYPE,
                                     State.getNextStackOffset(), RegVT,
                                     LocInfo));
    return false;
  }

  const unsigned StackSize = alignTo(ByValSize, PtrAlign);
  unsigned Offset = State.AllocateStack(StackSize, PtrAlign);
  for (const unsigned E = Offset + StackSize; Offset < E;
       Offset += PtrAlign.value()) {
    if (unsigned Reg = State.AllocateReg(IsPPC64 ? GPR_64 : GPR_32))
      State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, RegVT, LocInfo));
    else {
      State.addLoc(CCValAssign::getMem(ValNo, MVT::INVALID_SIMPLE_VALUE_TYPE,
                                       Offset, MVT::INVALID_SIMPLE_VALUE_TYPE,
                                       LocInfo));
      break;
    }
  }
  return false;
}

// Arguments always reserve parameter save area.
switch (ValVT.SimpleTy) {
default:
  report_fatal_error("Unhandled value type for argument.");
case MVT::i64:
  // i64 arguments should have been split to i32 for PPC32.
  assert(IsPPC64 && "PPC32 should have split i64 values.")(static_cast <bool> (IsPPC64 && "PPC32 should have split i64 values."
) ? void (0) : __assert_fail ("IsPPC64 && \"PPC32 should have split i64 values.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6710, __extension__
 __PRETTY_FUNCTION__));
  [[fallthrough]];
case MVT::i1:
case MVT::i32: {
  const unsigned Offset = State.AllocateStack(PtrAlign.value(), PtrAlign);
  // AIX integer arguments are always passed in register width.
  if (ValVT.getFixedSizeInBits() < RegVT.getFixedSizeInBits())
    LocInfo = ArgFlags.isSExt() ? CCValAssign::LocInfo::SExt
                                : CCValAssign::LocInfo::ZExt;
  if (unsigned Reg = State.AllocateReg(IsPPC64 ? GPR_64 : GPR_32))
    State.addLoc(CCValAssign::getReg(ValNo, ValVT, Reg, RegVT, LocInfo));
  else
    State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, RegVT, LocInfo));

  return false;
}
case MVT::f32:
case MVT::f64: {
  // Parameter save area (PSA) is reserved even if the float passes in fpr.
  const unsigned StoreSize = LocVT.getStoreSize();
  // Floats are always 4-byte aligned in the PSA on AIX.
  // This includes f64 in 64-bit mode for ABI compatibility.
  const unsigned Offset =
      State.AllocateStack(IsPPC64 ? 8 : StoreSize, Align(4));
  unsigned FReg = State.AllocateReg(FPR);
  if (FReg)
    State.addLoc(CCValAssign::getReg(ValNo, ValVT, FReg, LocVT, LocInfo));

  // Reserve and initialize GPRs or initialize the PSA as required.
  for (unsigned I = 0; I < StoreSize; I += PtrAlign.value()) {
    if (unsigned Reg = State.AllocateReg(IsPPC64 ? GPR_64 : GPR_32)) {
      assert(FReg && "An FPR should be available when a GPR is reserved.")(static_cast <bool> (FReg && "An FPR should be available when a GPR is reserved."
) ? void (0) : __assert_fail ("FReg && \"An FPR should be available when a GPR is reserved.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6741, __extension__
 __PRETTY_FUNCTION__));
      if (State.isVarArg()) {
        // Successfully reserved GPRs are only initialized for vararg calls.
        // Custom handling is required for:
        //   f64 in PPC32 needs to be split into 2 GPRs.
        //   f32 in PPC64 needs to occupy only lower 32 bits of 64-bit GPR.
        State.addLoc(
            CCValAssign::getCustomReg(ValNo, ValVT, Reg, RegVT, LocInfo));
      }
    } else {
      // If there are insufficient GPRs, the PSA needs to be initialized.
      // Initialization occurs even if an FPR was initialized for
      // compatibility with the AIX XL compiler. The full memory for the
      // argument will be initialized even if a prior word is saved in GPR.
      // A custom memLoc is used when the argument also passes in FPR so
      // that the callee handling can skip over it easily.
      State.addLoc(
          FReg ? CCValAssign::getCustomMem(ValNo, ValVT, Offset, LocVT,
                                           LocInfo)
               : CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
      break;
    }
  }

  return false;
}
case MVT::v4f32:
case MVT::v4i32:
case MVT::v8i16:
case MVT::v16i8:
case MVT::v2i64:
case MVT::v2f64:
case MVT::v1i128: {
  const unsigned VecSize = 16;
  const Align VecAlign(VecSize);

  if (!State.isVarArg()) {
    // If there are vector registers remaining we don't consume any stack
    // space.
    if (unsigned VReg = State.AllocateReg(VR)) {
      State.addLoc(CCValAssign::getReg(ValNo, ValVT, VReg, LocVT, LocInfo));
      return false;
    }
    // Vectors passed on the stack do not shadow GPRs or FPRs even though they
    // might be allocated in the portion of the PSA that is shadowed by the
    // GPRs.
    const unsigned Offset = State.AllocateStack(VecSize, VecAlign);
    State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
    return false;
  }

  const unsigned PtrSize = IsPPC64 ? 8 : 4;
  ArrayRef<MCPhysReg> GPRs = IsPPC64 ? GPR_64 : GPR_32;

  unsigned NextRegIndex = State.getFirstUnallocated(GPRs);
  // Burn any underaligned registers and their shadowed stack space until
  // we reach the required alignment.
  while (NextRegIndex != GPRs.size() &&
         !isGPRShadowAligned(GPRs[NextRegIndex], VecAlign)) {
    // Shadow allocate register and its stack shadow.
    unsigned Reg = State.AllocateReg(GPRs);
    State.AllocateStack(PtrSize, PtrAlign);
    assert(Reg && "Allocating register unexpectedly failed.")(static_cast <bool> (Reg && "Allocating register unexpectedly failed."
) ? void (0) : __assert_fail ("Reg && \"Allocating register unexpectedly failed.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6803, __extension__
 __PRETTY_FUNCTION__));
    (void)Reg;
    NextRegIndex = State.getFirstUnallocated(GPRs);
  }

  // Vectors that are passed as fixed arguments are handled differently.
  // They are passed in VRs if any are available (unlike arguments passed
  // through ellipses) and shadow GPRs (unlike arguments to non-vaarg
  // functions)
  if (State.isFixed(ValNo)) {
    if (unsigned VReg = State.AllocateReg(VR)) {
      State.addLoc(CCValAssign::getReg(ValNo, ValVT, VReg, LocVT, LocInfo));
      // Shadow allocate GPRs and stack space even though we pass in a VR.
      for (unsigned I = 0; I != VecSize; I += PtrSize)
        State.AllocateReg(GPRs);
      State.AllocateStack(VecSize, VecAlign);
      return false;
    }
    // No vector registers remain so pass on the stack.
    const unsigned Offset = State.AllocateStack(VecSize, VecAlign);
    State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
    return false;
  }

  // If all GPRS are consumed then we pass the argument fully on the stack.
  if (NextRegIndex == GPRs.size()) {
    const unsigned Offset = State.AllocateStack(VecSize, VecAlign);
    State.addLoc(CCValAssign::getMem(ValNo, ValVT, Offset, LocVT, LocInfo));
    return false;
  }

  // Corner case for 32-bit codegen. We have 2 registers to pass the first
  // half of the argument, and then need to pass the remaining half on the
  // stack.
  if (GPRs[NextRegIndex] == PPC::R9) {
    const unsigned Offset = State.AllocateStack(VecSize, VecAlign);
    State.addLoc(
        CCValAssign::getCustomMem(ValNo, ValVT, Offset, LocVT, LocInfo));

    const unsigned FirstReg = State.AllocateReg(PPC::R9);
    const unsigned SecondReg = State.AllocateReg(PPC::R10);
    assert(FirstReg && SecondReg &&(static_cast <bool> (FirstReg && SecondReg &&
 "Allocating R9 or R10 unexpectedly failed.") ? void (0) : __assert_fail
 ("FirstReg && SecondReg && \"Allocating R9 or R10 unexpectedly failed.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6845, __extension__
 __PRETTY_FUNCTION__))
           "Allocating R9 or R10 unexpectedly failed.")(static_cast <bool> (FirstReg && SecondReg &&
 "Allocating R9 or R10 unexpectedly failed.") ? void (0) : __assert_fail
 ("FirstReg && SecondReg && \"Allocating R9 or R10 unexpectedly failed.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6845, __extension__
 __PRETTY_FUNCTION__));
    State.addLoc(
        CCValAssign::getCustomReg(ValNo, ValVT, FirstReg, RegVT, LocInfo));
    State.addLoc(
        CCValAssign::getCustomReg(ValNo, ValVT, SecondReg, RegVT, LocInfo));
    return false;
  }

  // We have enough GPRs to fully pass the vector argument, and we have
  // already consumed any underaligned registers. Start with the custom
  // MemLoc and then the custom RegLocs.
  const unsigned Offset = State.AllocateStack(VecSize, VecAlign);
  State.addLoc(
      CCValAssign::getCustomMem(ValNo, ValVT, Offset, LocVT, LocInfo));
  for (unsigned I = 0; I != VecSize; I += PtrSize) {
    const unsigned Reg = State.AllocateReg(GPRs);
    assert(Reg && "Failed to allocated register for vararg vector argument")(static_cast <bool> (Reg && "Failed to allocated register for vararg vector argument"
) ? void (0) : __assert_fail ("Reg && \"Failed to allocated register for vararg vector argument\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6861, __extension__
 __PRETTY_FUNCTION__));
    State.addLoc(
        CCValAssign::getCustomReg(ValNo, ValVT, Reg, RegVT, LocInfo));
  }
  return false;
}
}
return true;
6869}

6871// So far, this function is only used by LowerFormalArguments_AIX()
6872static const TargetRegisterClass *getRegClassForSVT(MVT::SimpleValueType SVT,
                                                  bool IsPPC64,
                                                  bool HasP8Vector,
                                                  bool HasVSX) {
assert((IsPPC64 || SVT != MVT::i64) &&(static_cast <bool> ((IsPPC64 || SVT != MVT::i64) &&
 "i64 should have been split for 32-bit codegen.") ? void (0)
 : __assert_fail ("(IsPPC64 || SVT != MVT::i64) && \"i64 should have been split for 32-bit codegen.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6877, __extension__
 __PRETTY_FUNCTION__))
       "i64 should have been split for 32-bit codegen.")(static_cast <bool> ((IsPPC64 || SVT != MVT::i64) &&
 "i64 should have been split for 32-bit codegen.") ? void (0)
 : __assert_fail ("(IsPPC64 || SVT != MVT::i64) && \"i64 should have been split for 32-bit codegen.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6877, __extension__
 __PRETTY_FUNCTION__));

switch (SVT) {
default:
  report_fatal_error("Unexpected value type for formal argument");
case MVT::i1:
case MVT::i32:
case MVT::i64:
  return IsPPC64 ? &PPC::G8RCRegClass : &PPC::GPRCRegClass;
case MVT::f32:
  return HasP8Vector ? &PPC::VSSRCRegClass : &PPC::F4RCRegClass;
case MVT::f64:
  return HasVSX ? &PPC::VSFRCRegClass : &PPC::F8RCRegClass;
case MVT::v4f32:
case MVT::v4i32:
case MVT::v8i16:
case MVT::v16i8:
case MVT::v2i64:
case MVT::v2f64:
case MVT::v1i128:
  return &PPC::VRRCRegClass;
}
6899}

6901static SDValue truncateScalarIntegerArg(ISD::ArgFlagsTy Flags, EVT ValVT,
                                      SelectionDAG &DAG, SDValue ArgValue,
                                      MVT LocVT, const SDLoc &dl) {
assert(ValVT.isScalarInteger() && LocVT.isScalarInteger())(static_cast <bool> (ValVT.isScalarInteger() &&
 LocVT.isScalarInteger()) ? void (0) : __assert_fail ("ValVT.isScalarInteger() && LocVT.isScalarInteger()"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6904, __extension__
 __PRETTY_FUNCTION__));
assert(ValVT.getFixedSizeInBits() < LocVT.getFixedSizeInBits())(static_cast <bool> (ValVT.getFixedSizeInBits() < LocVT
.getFixedSizeInBits()) ? void (0) : __assert_fail ("ValVT.getFixedSizeInBits() < LocVT.getFixedSizeInBits()"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6905, __extension__
 __PRETTY_FUNCTION__));

if (Flags.isSExt())
  ArgValue = DAG.getNode(ISD::AssertSext, dl, LocVT, ArgValue,
                         DAG.getValueType(ValVT));
else if (Flags.isZExt())
  ArgValue = DAG.getNode(ISD::AssertZext, dl, LocVT, ArgValue,
                         DAG.getValueType(ValVT));

return DAG.getNode(ISD::TRUNCATE, dl, ValVT, ArgValue);
6915}

6917static unsigned mapArgRegToOffsetAIX(unsigned Reg, const PPCFrameLowering *FL) {
const unsigned LASize = FL->getLinkageSize();

if (PPC::GPRCRegClass.contains(Reg)) {
  assert(Reg >= PPC::R3 && Reg <= PPC::R10 &&(static_cast <bool> (Reg >= PPC::R3 && Reg <=
 PPC::R10 && "Reg must be a valid argument register!"
) ? void (0) : __assert_fail ("Reg >= PPC::R3 && Reg <= PPC::R10 && \"Reg must be a valid argument register!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6922, __extension__
 __PRETTY_FUNCTION__))
         "Reg must be a valid argument register!")(static_cast <bool> (Reg >= PPC::R3 && Reg <=
 PPC::R10 && "Reg must be a valid argument register!"
) ? void (0) : __assert_fail ("Reg >= PPC::R3 && Reg <= PPC::R10 && \"Reg must be a valid argument register!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6922, __extension__
 __PRETTY_FUNCTION__));
  return LASize + 4 * (Reg - PPC::R3);
}

if (PPC::G8RCRegClass.contains(Reg)) {
  assert(Reg >= PPC::X3 && Reg <= PPC::X10 &&(static_cast <bool> (Reg >= PPC::X3 && Reg <=
 PPC::X10 && "Reg must be a valid argument register!"
) ? void (0) : __assert_fail ("Reg >= PPC::X3 && Reg <= PPC::X10 && \"Reg must be a valid argument register!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6928, __extension__
 __PRETTY_FUNCTION__))
         "Reg must be a valid argument register!")(static_cast <bool> (Reg >= PPC::X3 && Reg <=
 PPC::X10 && "Reg must be a valid argument register!"
) ? void (0) : __assert_fail ("Reg >= PPC::X3 && Reg <= PPC::X10 && \"Reg must be a valid argument register!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6928, __extension__
 __PRETTY_FUNCTION__));
  return LASize + 8 * (Reg - PPC::X3);
}

llvm_unreachable("Only general purpose registers expected.")::llvm::llvm_unreachable_internal("Only general purpose registers expected."
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6932);
6933}

6935//   AIX ABI Stack Frame Layout:
6936//
6937//   Low Memory +--------------------------------------------+
6938//   SP   +---> | Back chain                                 | ---+
6939//        |     +--------------------------------------------+    |   
6940//        |     | Saved Condition Register                   |    |
6941//        |     +--------------------------------------------+    |
6942//        |     | Saved Linkage Register                     |    |
6943//        |     +--------------------------------------------+    | Linkage Area
6944//        |     | Reserved for compilers                     |    |
6945//        |     +--------------------------------------------+    |
6946//        |     | Reserved for binders                       |    |
6947//        |     +--------------------------------------------+    |
6948//        |     | Saved TOC pointer                          | ---+
6949//        |     +--------------------------------------------+
6950//        |     | Parameter save area                        |
6951//        |     +--------------------------------------------+
6952//        |     | Alloca space                               |
6953//        |     +--------------------------------------------+
6954//        |     | Local variable space                       |
6955//        |     +--------------------------------------------+
6956//        |     | Float/int conversion temporary             |
6957//        |     +--------------------------------------------+
6958//        |     | Save area for AltiVec registers            |
6959//        |     +--------------------------------------------+
6960//        |     | AltiVec alignment padding                  |
6961//        |     +--------------------------------------------+
6962//        |     | Save area for VRSAVE register              |
6963//        |     +--------------------------------------------+
6964//        |     | Save area for General Purpose registers    |
6965//        |     +--------------------------------------------+
6966//        |     | Save area for Floating Point registers     |
6967//        |     +--------------------------------------------+
6968//        +---- | Back chain                                 |
6969// High Memory  +--------------------------------------------+
6970//
6971//  Specifications:
6972//  AIX 7.2 Assembler Language Reference
6973//  Subroutine linkage convention

6975SDValue PPCTargetLowering::LowerFormalArguments_AIX(
  SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
  const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
  SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {

assert((CallConv == CallingConv::C || CallConv == CallingConv::Cold ||(static_cast <bool> ((CallConv == CallingConv::C || CallConv
 == CallingConv::Cold || CallConv == CallingConv::Fast) &&
 "Unexpected calling convention!") ? void (0) : __assert_fail
 ("(CallConv == CallingConv::C || CallConv == CallingConv::Cold || CallConv == CallingConv::Fast) && \"Unexpected calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6982, __extension__
 __PRETTY_FUNCTION__))
        CallConv == CallingConv::Fast) &&(static_cast <bool> ((CallConv == CallingConv::C || CallConv
 == CallingConv::Cold || CallConv == CallingConv::Fast) &&
 "Unexpected calling convention!") ? void (0) : __assert_fail
 ("(CallConv == CallingConv::C || CallConv == CallingConv::Cold || CallConv == CallingConv::Fast) && \"Unexpected calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6982, __extension__
 __PRETTY_FUNCTION__))
       "Unexpected calling convention!")(static_cast <bool> ((CallConv == CallingConv::C || CallConv
 == CallingConv::Cold || CallConv == CallingConv::Fast) &&
 "Unexpected calling convention!") ? void (0) : __assert_fail
 ("(CallConv == CallingConv::C || CallConv == CallingConv::Cold || CallConv == CallingConv::Fast) && \"Unexpected calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 6982, __extension__
 __PRETTY_FUNCTION__));

if (getTargetMachine().Options.GuaranteedTailCallOpt)
  report_fatal_error("Tail call support is unimplemented on AIX.");

if (useSoftFloat())
  report_fatal_error("Soft float support is unimplemented on AIX.");

const PPCSubtarget &Subtarget = DAG.getSubtarget<PPCSubtarget>();

const bool IsPPC64 = Subtarget.isPPC64();
const unsigned PtrByteSize = IsPPC64 ? 8 : 4;

// Assign locations to all of the incoming arguments.
SmallVector<CCValAssign, 16> ArgLocs;
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo &MFI = MF.getFrameInfo();
PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
AIXCCState CCInfo(CallConv, isVarArg, MF, ArgLocs, *DAG.getContext());

const EVT PtrVT = getPointerTy(MF.getDataLayout());
// Reserve space for the linkage area on the stack.
const unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
CCInfo.AllocateStack(LinkageSize, Align(PtrByteSize));
CCInfo.AnalyzeFormalArguments(Ins, CC_AIX);

SmallVector<SDValue, 8> MemOps;

for (size_t I = 0, End = ArgLocs.size(); I != End; /* No increment here */) {
  CCValAssign &VA = ArgLocs[I++];
  MVT LocVT = VA.getLocVT();
  MVT ValVT = VA.getValVT();
  ISD::ArgFlagsTy Flags = Ins[VA.getValNo()].Flags;
  // For compatibility with the AIX XL compiler, the float args in the
  // parameter save area are initialized even if the argument is available
  // in register.  The caller is required to initialize both the register
  // and memory, however, the callee can choose to expect it in either.
  // The memloc is dismissed here because the argument is retrieved from
  // the register.
  if (VA.isMemLoc() && VA.needsCustom() && ValVT.isFloatingPoint())
    continue;

  auto HandleMemLoc = [&]() {
    const unsigned LocSize = LocVT.getStoreSize();
    const unsigned ValSize = ValVT.getStoreSize();
    assert((ValSize <= LocSize) &&(static_cast <bool> ((ValSize <= LocSize) &&
 "Object size is larger than size of MemLoc") ? void (0) : __assert_fail
 ("(ValSize <= LocSize) && \"Object size is larger than size of MemLoc\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7028, __extension__
 __PRETTY_FUNCTION__))
           "Object size is larger than size of MemLoc")(static_cast <bool> ((ValSize <= LocSize) &&
 "Object size is larger than size of MemLoc") ? void (0) : __assert_fail
 ("(ValSize <= LocSize) && \"Object size is larger than size of MemLoc\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7028, __extension__
 __PRETTY_FUNCTION__));
    int CurArgOffset = VA.getLocMemOffset();
    // Objects are right-justified because AIX is big-endian.
    if (LocSize > ValSize)
      CurArgOffset += LocSize - ValSize;
    // Potential tail calls could cause overwriting of argument stack slots.
    const bool IsImmutable =
        !(getTargetMachine().Options.GuaranteedTailCallOpt &&
          (CallConv == CallingConv::Fast));
    int FI = MFI.CreateFixedObject(ValSize, CurArgOffset, IsImmutable);
    SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
    SDValue ArgValue =
        DAG.getLoad(ValVT, dl, Chain, FIN, MachinePointerInfo());
    InVals.push_back(ArgValue);
  };

  // Vector arguments to VaArg functions are passed both on the stack, and
  // in any available GPRs. Load the value from the stack and add the GPRs
  // as live ins.
  if (VA.isMemLoc() && VA.needsCustom()) {
    assert(ValVT.isVector() && "Unexpected Custom MemLoc type.")(static_cast <bool> (ValVT.isVector() && "Unexpected Custom MemLoc type."
) ? void (0) : __assert_fail ("ValVT.isVector() && \"Unexpected Custom MemLoc type.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7048, __extension__
 __PRETTY_FUNCTION__));
    assert(isVarArg && "Only use custom memloc for vararg.")(static_cast <bool> (isVarArg && "Only use custom memloc for vararg."
) ? void (0) : __assert_fail ("isVarArg && \"Only use custom memloc for vararg.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7049, __extension__
 __PRETTY_FUNCTION__));
    // ValNo of the custom MemLoc, so we can compare it to the ValNo of the
    // matching custom RegLocs.
    const unsigned OriginalValNo = VA.getValNo();
    (void)OriginalValNo;

    auto HandleCustomVecRegLoc = [&]() {
      assert(I != End && ArgLocs[I].isRegLoc() && ArgLocs[I].needsCustom() &&(static_cast <bool> (I != End && ArgLocs[I].isRegLoc
() && ArgLocs[I].needsCustom() && "Missing custom RegLoc."
) ? void (0) : __assert_fail ("I != End && ArgLocs[I].isRegLoc() && ArgLocs[I].needsCustom() && \"Missing custom RegLoc.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7057, __extension__
 __PRETTY_FUNCTION__))
             "Missing custom RegLoc.")(static_cast <bool> (I != End && ArgLocs[I].isRegLoc
() && ArgLocs[I].needsCustom() && "Missing custom RegLoc."
) ? void (0) : __assert_fail ("I != End && ArgLocs[I].isRegLoc() && ArgLocs[I].needsCustom() && \"Missing custom RegLoc.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7057, __extension__
 __PRETTY_FUNCTION__));
      VA = ArgLocs[I++];
      assert(VA.getValVT().isVector() &&(static_cast <bool> (VA.getValVT().isVector() &&
 "Unexpected Val type for custom RegLoc.") ? void (0) : __assert_fail
 ("VA.getValVT().isVector() && \"Unexpected Val type for custom RegLoc.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7060, __extension__
 __PRETTY_FUNCTION__))
             "Unexpected Val type for custom RegLoc.")(static_cast <bool> (VA.getValVT().isVector() &&
 "Unexpected Val type for custom RegLoc.") ? void (0) : __assert_fail
 ("VA.getValVT().isVector() && \"Unexpected Val type for custom RegLoc.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7060, __extension__
 __PRETTY_FUNCTION__));
      assert(VA.getValNo() == OriginalValNo &&(static_cast <bool> (VA.getValNo() == OriginalValNo &&
 "ValNo mismatch between custom MemLoc and RegLoc.") ? void (
0) : __assert_fail ("VA.getValNo() == OriginalValNo && \"ValNo mismatch between custom MemLoc and RegLoc.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7062, __extension__
 __PRETTY_FUNCTION__))
             "ValNo mismatch between custom MemLoc and RegLoc.")(static_cast <bool> (VA.getValNo() == OriginalValNo &&
 "ValNo mismatch between custom MemLoc and RegLoc.") ? void (
0) : __assert_fail ("VA.getValNo() == OriginalValNo && \"ValNo mismatch between custom MemLoc and RegLoc.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7062, __extension__
 __PRETTY_FUNCTION__));
      MVT::SimpleValueType SVT = VA.getLocVT().SimpleTy;
      MF.addLiveIn(VA.getLocReg(),
                   getRegClassForSVT(SVT, IsPPC64, Subtarget.hasP8Vector(),
                                     Subtarget.hasVSX()));
    };

    HandleMemLoc();
    // In 64-bit there will be exactly 2 custom RegLocs that follow, and in
    // in 32-bit there will be 2 custom RegLocs if we are passing in R9 and
    // R10.
    HandleCustomVecRegLoc();
    HandleCustomVecRegLoc();

    // If we are targeting 32-bit, there might be 2 extra custom RegLocs if
    // we passed the vector in R5, R6, R7 and R8.
    if (I != End && ArgLocs[I].isRegLoc() && ArgLocs[I].needsCustom()) {
      assert(!IsPPC64 &&(static_cast <bool> (!IsPPC64 && "Only 2 custom RegLocs expected for 64-bit codegen."
) ? void (0) : __assert_fail ("!IsPPC64 && \"Only 2 custom RegLocs expected for 64-bit codegen.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7080, __extension__
 __PRETTY_FUNCTION__))
             "Only 2 custom RegLocs expected for 64-bit codegen.")(static_cast <bool> (!IsPPC64 && "Only 2 custom RegLocs expected for 64-bit codegen."
) ? void (0) : __assert_fail ("!IsPPC64 && \"Only 2 custom RegLocs expected for 64-bit codegen.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7080, __extension__
 __PRETTY_FUNCTION__));
      HandleCustomVecRegLoc();
      HandleCustomVecRegLoc();
    }

    continue;
  }

  if (VA.isRegLoc()) {
    if (VA.getValVT().isScalarInteger())
      FuncInfo->appendParameterType(PPCFunctionInfo::FixedType);
    else if (VA.getValVT().isFloatingPoint() && !VA.getValVT().isVector()) {
      switch (VA.getValVT().SimpleTy) {
      default:
        report_fatal_error("Unhandled value type for argument.");
      case MVT::f32:
        FuncInfo->appendParameterType(PPCFunctionInfo::ShortFloatingPoint);
        break;
      case MVT::f64:
        FuncInfo->appendParameterType(PPCFunctionInfo::LongFloatingPoint);
        break;
      }
    } else if (VA.getValVT().isVector()) {
      switch (VA.getValVT().SimpleTy) {
      default:
        report_fatal_error("Unhandled value type for argument.");
      case MVT::v16i8:
        FuncInfo->appendParameterType(PPCFunctionInfo::VectorChar);
        break;
      case MVT::v8i16:
        FuncInfo->appendParameterType(PPCFunctionInfo::VectorShort);
        break;
      case MVT::v4i32:
      case MVT::v2i64:
      case MVT::v1i128:
        FuncInfo->appendParameterType(PPCFunctionInfo::VectorInt);
        break;
      case MVT::v4f32:
      case MVT::v2f64:
        FuncInfo->appendParameterType(PPCFunctionInfo::VectorFloat);
        break;
      }
    }
  }

  if (Flags.isByVal() && VA.isMemLoc()) {
    const unsigned Size =
        alignTo(Flags.getByValSize() ? Flags.getByValSize() : PtrByteSize,
                PtrByteSize);
    const int FI = MF.getFrameInfo().CreateFixedObject(
        Size, VA.getLocMemOffset(), /* IsImmutable */ false,
        /* IsAliased */ true);
    SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
    InVals.push_back(FIN);

    continue;
  }

  if (Flags.isByVal()) {
    assert(VA.isRegLoc() && "MemLocs should already be handled.")(static_cast <bool> (VA.isRegLoc() && "MemLocs should already be handled."
) ? void (0) : __assert_fail ("VA.isRegLoc() && \"MemLocs should already be handled.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7139, __extension__
 __PRETTY_FUNCTION__));

    const MCPhysReg ArgReg = VA.getLocReg();
    const PPCFrameLowering *FL = Subtarget.getFrameLowering();

    if (Flags.getNonZeroByValAlign() > PtrByteSize)
      report_fatal_error("Over aligned byvals not supported yet.");

    const unsigned StackSize = alignTo(Flags.getByValSize(), PtrByteSize);
    const int FI = MF.getFrameInfo().CreateFixedObject(
        StackSize, mapArgRegToOffsetAIX(ArgReg, FL), /* IsImmutable */ false,
        /* IsAliased */ true);
    SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
    InVals.push_back(FIN);

    // Add live ins for all the RegLocs for the same ByVal.
    const TargetRegisterClass *RegClass =
        IsPPC64 ? &PPC::G8RCRegClass : &PPC::GPRCRegClass;

    auto HandleRegLoc = [&, RegClass, LocVT](const MCPhysReg PhysReg,
                                             unsigned Offset) {
      const Register VReg = MF.addLiveIn(PhysReg, RegClass);
      // Since the callers side has left justified the aggregate in the
      // register, we can simply store the entire register into the stack
      // slot.
      SDValue CopyFrom = DAG.getCopyFromReg(Chain, dl, VReg, LocVT);
      // The store to the fixedstack object is needed becuase accessing a
      // field of the ByVal will use a gep and load. Ideally we will optimize
      // to extracting the value from the register directly, and elide the
      // stores when the arguments address is not taken, but that will need to
      // be future work.
      SDValue Store = DAG.getStore(
          CopyFrom.getValue(1), dl, CopyFrom,
          DAG.getObjectPtrOffset(dl, FIN, TypeSize::Fixed(Offset)),
          MachinePointerInfo::getFixedStack(MF, FI, Offset));

      MemOps.push_back(Store);
    };

    unsigned Offset = 0;
    HandleRegLoc(VA.getLocReg(), Offset);
    Offset += PtrByteSize;
    for (; Offset != StackSize && ArgLocs[I].isRegLoc();
         Offset += PtrByteSize) {
      assert(ArgLocs[I].getValNo() == VA.getValNo() &&(static_cast <bool> (ArgLocs[I].getValNo() == VA.getValNo
() && "RegLocs should be for ByVal argument.") ? void
 (0) : __assert_fail ("ArgLocs[I].getValNo() == VA.getValNo() && \"RegLocs should be for ByVal argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7184, __extension__
 __PRETTY_FUNCTION__))
             "RegLocs should be for ByVal argument.")(static_cast <bool> (ArgLocs[I].getValNo() == VA.getValNo
() && "RegLocs should be for ByVal argument.") ? void
 (0) : __assert_fail ("ArgLocs[I].getValNo() == VA.getValNo() && \"RegLocs should be for ByVal argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7184, __extension__
 __PRETTY_FUNCTION__));

      const CCValAssign RL = ArgLocs[I++];
      HandleRegLoc(RL.getLocReg(), Offset);
      FuncInfo->appendParameterType(PPCFunctionInfo::FixedType);
    }

    if (Offset != StackSize) {
      assert(ArgLocs[I].getValNo() == VA.getValNo() &&(static_cast <bool> (ArgLocs[I].getValNo() == VA.getValNo
() && "Expected MemLoc for remaining bytes.") ? void (
0) : __assert_fail ("ArgLocs[I].getValNo() == VA.getValNo() && \"Expected MemLoc for remaining bytes.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7193, __extension__
 __PRETTY_FUNCTION__))
             "Expected MemLoc for remaining bytes.")(static_cast <bool> (ArgLocs[I].getValNo() == VA.getValNo
() && "Expected MemLoc for remaining bytes.") ? void (
0) : __assert_fail ("ArgLocs[I].getValNo() == VA.getValNo() && \"Expected MemLoc for remaining bytes.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7193, __extension__
 __PRETTY_FUNCTION__));
      assert(ArgLocs[I].isMemLoc() && "Expected MemLoc for remaining bytes.")(static_cast <bool> (ArgLocs[I].isMemLoc() && "Expected MemLoc for remaining bytes."
) ? void (0) : __assert_fail ("ArgLocs[I].isMemLoc() && \"Expected MemLoc for remaining bytes.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7194, __extension__
 __PRETTY_FUNCTION__));
      // Consume the MemLoc.The InVal has already been emitted, so nothing
      // more needs to be done.
      ++I;
    }

    continue;
  }

  if (VA.isRegLoc() && !VA.needsCustom()) {
    MVT::SimpleValueType SVT = ValVT.SimpleTy;
    Register VReg =
        MF.addLiveIn(VA.getLocReg(),
                     getRegClassForSVT(SVT, IsPPC64, Subtarget.hasP8Vector(),
                                       Subtarget.hasVSX()));
    SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, VReg, LocVT);
    if (ValVT.isScalarInteger() &&
        (ValVT.getFixedSizeInBits() < LocVT.getFixedSizeInBits())) {
      ArgValue =
          truncateScalarIntegerArg(Flags, ValVT, DAG, ArgValue, LocVT, dl);
    }
    InVals.push_back(ArgValue);
    continue;
  }
  if (VA.isMemLoc()) {
    HandleMemLoc();
    continue;
  }
}

// On AIX a minimum of 8 words is saved to the parameter save area.
const unsigned MinParameterSaveArea = 8 * PtrByteSize;
// Area that is at least reserved in the caller of this function.
unsigned CallerReservedArea =
    std::max(CCInfo.getNextStackOffset(), LinkageSize + MinParameterSaveArea);

// Set the size that is at least reserved in caller of this function. Tail
// call optimized function's reserved stack space needs to be aligned so
// that taking the difference between two stack areas will result in an
// aligned stack.
CallerReservedArea =
    EnsureStackAlignment(Subtarget.getFrameLowering(), CallerReservedArea);
FuncInfo->setMinReservedArea(CallerReservedArea);

if (isVarArg) {
  FuncInfo->setVarArgsFrameIndex(
      MFI.CreateFixedObject(PtrByteSize, CCInfo.getNextStackOffset(), true));
  SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);

  static const MCPhysReg GPR_32[] = {PPC::R3, PPC::R4, PPC::R5, PPC::R6,
                                     PPC::R7, PPC::R8, PPC::R9, PPC::R10};

  static const MCPhysReg GPR_64[] = {PPC::X3, PPC::X4, PPC::X5, PPC::X6,
                                     PPC::X7, PPC::X8, PPC::X9, PPC::X10};
  const unsigned NumGPArgRegs = std::size(IsPPC64 ? GPR_64 : GPR_32);

  // The fixed integer arguments of a variadic function are stored to the
  // VarArgsFrameIndex on the stack so that they may be loaded by
  // dereferencing the result of va_next.
  for (unsigned GPRIndex =
           (CCInfo.getNextStackOffset() - LinkageSize) / PtrByteSize;
       GPRIndex < NumGPArgRegs; ++GPRIndex) {

    const Register VReg =
        IsPPC64 ? MF.addLiveIn(GPR_64[GPRIndex], &PPC::G8RCRegClass)
                : MF.addLiveIn(GPR_32[GPRIndex], &PPC::GPRCRegClass);

    SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
    SDValue Store =
        DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
    MemOps.push_back(Store);
    // Increment the address for the next argument to store.
    SDValue PtrOff = DAG.getConstant(PtrByteSize, dl, PtrVT);
    FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
  }
}

if (!MemOps.empty())
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);

return Chain;
7275}

7277SDValue PPCTargetLowering::LowerCall_AIX(
  SDValue Chain, SDValue Callee, CallFlags CFlags,
  const SmallVectorImpl<ISD::OutputArg> &Outs,
  const SmallVectorImpl<SDValue> &OutVals,
  const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
  SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals,
  const CallBase *CB) const {
// See PPCTargetLowering::LowerFormalArguments_AIX() for a description of the
// AIX ABI stack frame layout.

assert((CFlags.CallConv == CallingConv::C ||(static_cast <bool> ((CFlags.CallConv == CallingConv::C
 || CFlags.CallConv == CallingConv::Cold || CFlags.CallConv ==
 CallingConv::Fast) && "Unexpected calling convention!"
) ? void (0) : __assert_fail ("(CFlags.CallConv == CallingConv::C || CFlags.CallConv == CallingConv::Cold || CFlags.CallConv == CallingConv::Fast) && \"Unexpected calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7290, __extension__
 __PRETTY_FUNCTION__))
        CFlags.CallConv == CallingConv::Cold ||(static_cast <bool> ((CFlags.CallConv == CallingConv::C
 || CFlags.CallConv == CallingConv::Cold || CFlags.CallConv ==
 CallingConv::Fast) && "Unexpected calling convention!"
) ? void (0) : __assert_fail ("(CFlags.CallConv == CallingConv::C || CFlags.CallConv == CallingConv::Cold || CFlags.CallConv == CallingConv::Fast) && \"Unexpected calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7290, __extension__
 __PRETTY_FUNCTION__))
        CFlags.CallConv == CallingConv::Fast) &&(static_cast <bool> ((CFlags.CallConv == CallingConv::C
 || CFlags.CallConv == CallingConv::Cold || CFlags.CallConv ==
 CallingConv::Fast) && "Unexpected calling convention!"
) ? void (0) : __assert_fail ("(CFlags.CallConv == CallingConv::C || CFlags.CallConv == CallingConv::Cold || CFlags.CallConv == CallingConv::Fast) && \"Unexpected calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7290, __extension__
 __PRETTY_FUNCTION__))
       "Unexpected calling convention!")(static_cast <bool> ((CFlags.CallConv == CallingConv::C
 || CFlags.CallConv == CallingConv::Cold || CFlags.CallConv ==
 CallingConv::Fast) && "Unexpected calling convention!"
) ? void (0) : __assert_fail ("(CFlags.CallConv == CallingConv::C || CFlags.CallConv == CallingConv::Cold || CFlags.CallConv == CallingConv::Fast) && \"Unexpected calling convention!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7290, __extension__
 __PRETTY_FUNCTION__));

if (CFlags.IsPatchPoint)
  report_fatal_error("This call type is unimplemented on AIX.");

const PPCSubtarget &Subtarget = DAG.getSubtarget<PPCSubtarget>();

MachineFunction &MF = DAG.getMachineFunction();
SmallVector<CCValAssign, 16> ArgLocs;
AIXCCState CCInfo(CFlags.CallConv, CFlags.IsVarArg, MF, ArgLocs,
                  *DAG.getContext());

// Reserve space for the linkage save area (LSA) on the stack.
// In both PPC32 and PPC64 there are 6 reserved slots in the LSA:
//   [SP][CR][LR][2 x reserved][TOC].
// The LSA is 24 bytes (6x4) in PPC32 and 48 bytes (6x8) in PPC64.
const unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
const bool IsPPC64 = Subtarget.isPPC64();
const EVT PtrVT = getPointerTy(DAG.getDataLayout());
const unsigned PtrByteSize = IsPPC64 ? 8 : 4;
CCInfo.AllocateStack(LinkageSize, Align(PtrByteSize));
CCInfo.AnalyzeCallOperands(Outs, CC_AIX);

// The prolog code of the callee may store up to 8 GPR argument registers to
// the stack, allowing va_start to index over them in memory if the callee
// is variadic.
// Because we cannot tell if this is needed on the caller side, we have to
// conservatively assume that it is needed.  As such, make sure we have at
// least enough stack space for the caller to store the 8 GPRs.
const unsigned MinParameterSaveAreaSize = 8 * PtrByteSize;
const unsigned NumBytes = std::max(LinkageSize + MinParameterSaveAreaSize,
                                   CCInfo.getNextStackOffset());

// Adjust the stack pointer for the new arguments...
// These operations are automatically eliminated by the prolog/epilog pass.
Chain = DAG.getCALLSEQ_START(Chain, NumBytes, 0, dl);
SDValue CallSeqStart = Chain;

SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
SmallVector<SDValue, 8> MemOpChains;

// Set up a copy of the stack pointer for loading and storing any
// arguments that may not fit in the registers available for argument
// passing.
const SDValue StackPtr = IsPPC64 ? DAG.getRegister(PPC::X1, MVT::i64)
                                 : DAG.getRegister(PPC::R1, MVT::i32);

for (unsigned I = 0, E = ArgLocs.size(); I != E;) {
  const unsigned ValNo = ArgLocs[I].getValNo();
  SDValue Arg = OutVals[ValNo];
  ISD::ArgFlagsTy Flags = Outs[ValNo].Flags;

  if (Flags.isByVal()) {
    const unsigned ByValSize = Flags.getByValSize();

    // Nothing to do for zero-sized ByVals on the caller side.
    if (!ByValSize) {
      ++I;
      continue;
    }

    auto GetLoad = [&](EVT VT, unsigned LoadOffset) {
      return DAG.getExtLoad(
          ISD::ZEXTLOAD, dl, PtrVT, Chain,
          (LoadOffset != 0)
              ? DAG.getObjectPtrOffset(dl, Arg, TypeSize::Fixed(LoadOffset))
              : Arg,
          MachinePointerInfo(), VT);
    };

    unsigned LoadOffset = 0;

    // Initialize registers, which are fully occupied by the by-val argument.
    while (LoadOffset + PtrByteSize <= ByValSize && ArgLocs[I].isRegLoc()) {
      SDValue Load = GetLoad(PtrVT, LoadOffset);
      MemOpChains.push_back(Load.getValue(1));
      LoadOffset += PtrByteSize;
      const CCValAssign &ByValVA = ArgLocs[I++];
      assert(ByValVA.getValNo() == ValNo &&(static_cast <bool> (ByValVA.getValNo() == ValNo &&
 "Unexpected location for pass-by-value argument.") ? void (0
) : __assert_fail ("ByValVA.getValNo() == ValNo && \"Unexpected location for pass-by-value argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7369, __extension__
 __PRETTY_FUNCTION__))
             "Unexpected location for pass-by-value argument.")(static_cast <bool> (ByValVA.getValNo() == ValNo &&
 "Unexpected location for pass-by-value argument.") ? void (0
) : __assert_fail ("ByValVA.getValNo() == ValNo && \"Unexpected location for pass-by-value argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7369, __extension__
 __PRETTY_FUNCTION__));
      RegsToPass.push_back(std::make_pair(ByValVA.getLocReg(), Load));
    }

    if (LoadOffset == ByValSize)
      continue;

    // There must be one more loc to handle the remainder.
    assert(ArgLocs[I].getValNo() == ValNo &&(static_cast <bool> (ArgLocs[I].getValNo() == ValNo &&
 "Expected additional location for by-value argument.") ? void
 (0) : __assert_fail ("ArgLocs[I].getValNo() == ValNo && \"Expected additional location for by-value argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7378, __extension__
 __PRETTY_FUNCTION__))
           "Expected additional location for by-value argument.")(static_cast <bool> (ArgLocs[I].getValNo() == ValNo &&
 "Expected additional location for by-value argument.") ? void
 (0) : __assert_fail ("ArgLocs[I].getValNo() == ValNo && \"Expected additional location for by-value argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7378, __extension__
 __PRETTY_FUNCTION__));

    if (ArgLocs[I].isMemLoc()) {
      assert(LoadOffset < ByValSize && "Unexpected memloc for by-val arg.")(static_cast <bool> (LoadOffset < ByValSize &&
 "Unexpected memloc for by-val arg.") ? void (0) : __assert_fail
 ("LoadOffset < ByValSize && \"Unexpected memloc for by-val arg.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7381, __extension__
 __PRETTY_FUNCTION__));
      const CCValAssign &ByValVA = ArgLocs[I++];
      ISD::ArgFlagsTy MemcpyFlags = Flags;
      // Only memcpy the bytes that don't pass in register.
      MemcpyFlags.setByValSize(ByValSize - LoadOffset);
      Chain = CallSeqStart = createMemcpyOutsideCallSeq(
          (LoadOffset != 0)
              ? DAG.getObjectPtrOffset(dl, Arg, TypeSize::Fixed(LoadOffset))
              : Arg,
          DAG.getObjectPtrOffset(dl, StackPtr,
                                 TypeSize::Fixed(ByValVA.getLocMemOffset())),
          CallSeqStart, MemcpyFlags, DAG, dl);
      continue;
    }

    // Initialize the final register residue.
    // Any residue that occupies the final by-val arg register must be
    // left-justified on AIX. Loads must be a power-of-2 size and cannot be
    // larger than the ByValSize. For example: a 7 byte by-val arg requires 4,
    // 2 and 1 byte loads.
    const unsigned ResidueBytes = ByValSize % PtrByteSize;
    assert(ResidueBytes != 0 && LoadOffset + PtrByteSize > ByValSize &&(static_cast <bool> (ResidueBytes != 0 && LoadOffset
 + PtrByteSize > ByValSize && "Unexpected register residue for by-value argument."
) ? void (0) : __assert_fail ("ResidueBytes != 0 && LoadOffset + PtrByteSize > ByValSize && \"Unexpected register residue for by-value argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7403, __extension__
 __PRETTY_FUNCTION__))
           "Unexpected register residue for by-value argument.")(static_cast <bool> (ResidueBytes != 0 && LoadOffset
 + PtrByteSize > ByValSize && "Unexpected register residue for by-value argument."
) ? void (0) : __assert_fail ("ResidueBytes != 0 && LoadOffset + PtrByteSize > ByValSize && \"Unexpected register residue for by-value argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7403, __extension__
 __PRETTY_FUNCTION__));
    SDValue ResidueVal;
    for (unsigned Bytes = 0; Bytes != ResidueBytes;) {
      const unsigned N = llvm::bit_floor(ResidueBytes - Bytes);
      const MVT VT =
          N == 1 ? MVT::i8
                 : ((N == 2) ? MVT::i16 : (N == 4 ? MVT::i32 : MVT::i64));
      SDValue Load = GetLoad(VT, LoadOffset);
      MemOpChains.push_back(Load.getValue(1));
      LoadOffset += N;
      Bytes += N;

      // By-val arguments are passed left-justfied in register.
      // Every load here needs to be shifted, otherwise a full register load
      // should have been used.
      assert(PtrVT.getSimpleVT().getSizeInBits() > (Bytes * 8) &&(static_cast <bool> (PtrVT.getSimpleVT().getSizeInBits(
) > (Bytes * 8) && "Unexpected load emitted during handling of pass-by-value "
 "argument.") ? void (0) : __assert_fail ("PtrVT.getSimpleVT().getSizeInBits() > (Bytes * 8) && \"Unexpected load emitted during handling of pass-by-value \" \"argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7420, __extension__
 __PRETTY_FUNCTION__))
             "Unexpected load emitted during handling of pass-by-value "(static_cast <bool> (PtrVT.getSimpleVT().getSizeInBits(
) > (Bytes * 8) && "Unexpected load emitted during handling of pass-by-value "
 "argument.") ? void (0) : __assert_fail ("PtrVT.getSimpleVT().getSizeInBits() > (Bytes * 8) && \"Unexpected load emitted during handling of pass-by-value \" \"argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7420, __extension__
 __PRETTY_FUNCTION__))
             "argument.")(static_cast <bool> (PtrVT.getSimpleVT().getSizeInBits(
) > (Bytes * 8) && "Unexpected load emitted during handling of pass-by-value "
 "argument.") ? void (0) : __assert_fail ("PtrVT.getSimpleVT().getSizeInBits() > (Bytes * 8) && \"Unexpected load emitted during handling of pass-by-value \" \"argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7420, __extension__
 __PRETTY_FUNCTION__));
      unsigned NumSHLBits = PtrVT.getSimpleVT().getSizeInBits() - (Bytes * 8);
      EVT ShiftAmountTy =
          getShiftAmountTy(Load->getValueType(0), DAG.getDataLayout());
      SDValue SHLAmt = DAG.getConstant(NumSHLBits, dl, ShiftAmountTy);
      SDValue ShiftedLoad =
          DAG.getNode(ISD::SHL, dl, Load.getValueType(), Load, SHLAmt);
      ResidueVal = ResidueVal ? DAG.getNode(ISD::OR, dl, PtrVT, ResidueVal,
                                            ShiftedLoad)
                              : ShiftedLoad;
    }

    const CCValAssign &ByValVA = ArgLocs[I++];
    RegsToPass.push_back(std::make_pair(ByValVA.getLocReg(), ResidueVal));
    continue;
  }

  CCValAssign &VA = ArgLocs[I++];
  const MVT LocVT = VA.getLocVT();
  const MVT ValVT = VA.getValVT();

  switch (VA.getLocInfo()) {
  default:
    report_fatal_error("Unexpected argument extension type.");
  case CCValAssign::Full:
    break;
  case CCValAssign::ZExt:
    Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
    break;
  case CCValAssign::SExt:
    Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
    break;
  }

  if (VA.isRegLoc() && !VA.needsCustom()) {
    RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
    continue;
  }

  // Vector arguments passed to VarArg functions need custom handling when
  // they are passed (at least partially) in GPRs.
  if (VA.isMemLoc() && VA.needsCustom() && ValVT.isVector()) {
    assert(CFlags.IsVarArg && "Custom MemLocs only used for Vector args.")(static_cast <bool> (CFlags.IsVarArg && "Custom MemLocs only used for Vector args."
) ? void (0) : __assert_fail ("CFlags.IsVarArg && \"Custom MemLocs only used for Vector args.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7462, __extension__
 __PRETTY_FUNCTION__));
    // Store value to its stack slot.
    SDValue PtrOff =
        DAG.getConstant(VA.getLocMemOffset(), dl, StackPtr.getValueType());
    PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
    SDValue Store =
        DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo());
    MemOpChains.push_back(Store);
    const unsigned OriginalValNo = VA.getValNo();
    // Then load the GPRs from the stack
    unsigned LoadOffset = 0;
    auto HandleCustomVecRegLoc = [&]() {
      assert(I != E && "Unexpected end of CCvalAssigns.")(static_cast <bool> (I != E && "Unexpected end of CCvalAssigns."
) ? void (0) : __assert_fail ("I != E && \"Unexpected end of CCvalAssigns.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7474, __extension__
 __PRETTY_FUNCTION__));
      assert(ArgLocs[I].isRegLoc() && ArgLocs[I].needsCustom() &&(static_cast <bool> (ArgLocs[I].isRegLoc() && ArgLocs
[I].needsCustom() && "Expected custom RegLoc.") ? void
 (0) : __assert_fail ("ArgLocs[I].isRegLoc() && ArgLocs[I].needsCustom() && \"Expected custom RegLoc.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7476, __extension__
 __PRETTY_FUNCTION__))
             "Expected custom RegLoc.")(static_cast <bool> (ArgLocs[I].isRegLoc() && ArgLocs
[I].needsCustom() && "Expected custom RegLoc.") ? void
 (0) : __assert_fail ("ArgLocs[I].isRegLoc() && ArgLocs[I].needsCustom() && \"Expected custom RegLoc.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7476, __extension__
 __PRETTY_FUNCTION__));
      CCValAssign RegVA = ArgLocs[I++];
      assert(RegVA.getValNo() == OriginalValNo &&(static_cast <bool> (RegVA.getValNo() == OriginalValNo &&
 "Custom MemLoc ValNo and custom RegLoc ValNo must match.") ?
 void (0) : __assert_fail ("RegVA.getValNo() == OriginalValNo && \"Custom MemLoc ValNo and custom RegLoc ValNo must match.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7479, __extension__
 __PRETTY_FUNCTION__))
             "Custom MemLoc ValNo and custom RegLoc ValNo must match.")(static_cast <bool> (RegVA.getValNo() == OriginalValNo &&
 "Custom MemLoc ValNo and custom RegLoc ValNo must match.") ?
 void (0) : __assert_fail ("RegVA.getValNo() == OriginalValNo && \"Custom MemLoc ValNo and custom RegLoc ValNo must match.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7479, __extension__
 __PRETTY_FUNCTION__));
      SDValue Add = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff,
                                DAG.getConstant(LoadOffset, dl, PtrVT));
      SDValue Load = DAG.getLoad(PtrVT, dl, Store, Add, MachinePointerInfo());
      MemOpChains.push_back(Load.getValue(1));
      RegsToPass.push_back(std::make_pair(RegVA.getLocReg(), Load));
      LoadOffset += PtrByteSize;
    };

    // In 64-bit there will be exactly 2 custom RegLocs that follow, and in
    // in 32-bit there will be 2 custom RegLocs if we are passing in R9 and
    // R10.
    HandleCustomVecRegLoc();
    HandleCustomVecRegLoc();

    if (I != E && ArgLocs[I].isRegLoc() && ArgLocs[I].needsCustom() &&
        ArgLocs[I].getValNo() == OriginalValNo) {
      assert(!IsPPC64 &&(static_cast <bool> (!IsPPC64 && "Only 2 custom RegLocs expected for 64-bit codegen."
) ? void (0) : __assert_fail ("!IsPPC64 && \"Only 2 custom RegLocs expected for 64-bit codegen.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7497, __extension__
 __PRETTY_FUNCTION__))
             "Only 2 custom RegLocs expected for 64-bit codegen.")(static_cast <bool> (!IsPPC64 && "Only 2 custom RegLocs expected for 64-bit codegen."
) ? void (0) : __assert_fail ("!IsPPC64 && \"Only 2 custom RegLocs expected for 64-bit codegen.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7497, __extension__
 __PRETTY_FUNCTION__));
      HandleCustomVecRegLoc();
      HandleCustomVecRegLoc();
    }

    continue;
  }

  if (VA.isMemLoc()) {
    SDValue PtrOff =
        DAG.getConstant(VA.getLocMemOffset(), dl, StackPtr.getValueType());
    PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
    MemOpChains.push_back(
        DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo()));

    continue;
  }

  if (!ValVT.isFloatingPoint())
    report_fatal_error(
        "Unexpected register handling for calling convention.");

  // Custom handling is used for GPR initializations for vararg float
  // arguments.
  assert(VA.isRegLoc() && VA.needsCustom() && CFlags.IsVarArg &&(static_cast <bool> (VA.isRegLoc() && VA.needsCustom
() && CFlags.IsVarArg && LocVT.isInteger() &&
 "Custom register handling only expected for VarArg.") ? void
 (0) : __assert_fail ("VA.isRegLoc() && VA.needsCustom() && CFlags.IsVarArg && LocVT.isInteger() && \"Custom register handling only expected for VarArg.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7523, __extension__
 __PRETTY_FUNCTION__))
         LocVT.isInteger() &&(static_cast <bool> (VA.isRegLoc() && VA.needsCustom
() && CFlags.IsVarArg && LocVT.isInteger() &&
 "Custom register handling only expected for VarArg.") ? void
 (0) : __assert_fail ("VA.isRegLoc() && VA.needsCustom() && CFlags.IsVarArg && LocVT.isInteger() && \"Custom register handling only expected for VarArg.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7523, __extension__
 __PRETTY_FUNCTION__))
         "Custom register handling only expected for VarArg.")(static_cast <bool> (VA.isRegLoc() && VA.needsCustom
() && CFlags.IsVarArg && LocVT.isInteger() &&
 "Custom register handling only expected for VarArg.") ? void
 (0) : __assert_fail ("VA.isRegLoc() && VA.needsCustom() && CFlags.IsVarArg && LocVT.isInteger() && \"Custom register handling only expected for VarArg.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7523, __extension__
 __PRETTY_FUNCTION__));

  SDValue ArgAsInt =
      DAG.getBitcast(MVT::getIntegerVT(ValVT.getSizeInBits()), Arg);

  if (Arg.getValueType().getStoreSize() == LocVT.getStoreSize())
    // f32 in 32-bit GPR
    // f64 in 64-bit GPR
    RegsToPass.push_back(std::make_pair(VA.getLocReg(), ArgAsInt));
  else if (Arg.getValueType().getFixedSizeInBits() <
           LocVT.getFixedSizeInBits())
    // f32 in 64-bit GPR.
    RegsToPass.push_back(std::make_pair(
        VA.getLocReg(), DAG.getZExtOrTrunc(ArgAsInt, dl, LocVT)));
  else {
    // f64 in two 32-bit GPRs
    // The 2 GPRs are marked custom and expected to be adjacent in ArgLocs.
    assert(Arg.getValueType() == MVT::f64 && CFlags.IsVarArg && !IsPPC64 &&(static_cast <bool> (Arg.getValueType() == MVT::f64 &&
 CFlags.IsVarArg && !IsPPC64 && "Unexpected custom register for argument!"
) ? void (0) : __assert_fail ("Arg.getValueType() == MVT::f64 && CFlags.IsVarArg && !IsPPC64 && \"Unexpected custom register for argument!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7541, __extension__
 __PRETTY_FUNCTION__))
           "Unexpected custom register for argument!")(static_cast <bool> (Arg.getValueType() == MVT::f64 &&
 CFlags.IsVarArg && !IsPPC64 && "Unexpected custom register for argument!"
) ? void (0) : __assert_fail ("Arg.getValueType() == MVT::f64 && CFlags.IsVarArg && !IsPPC64 && \"Unexpected custom register for argument!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7541, __extension__
 __PRETTY_FUNCTION__));
    CCValAssign &GPR1 = VA;
    SDValue MSWAsI64 = DAG.getNode(ISD::SRL, dl, MVT::i64, ArgAsInt,
                                   DAG.getConstant(32, dl, MVT::i8));
    RegsToPass.push_back(std::make_pair(
        GPR1.getLocReg(), DAG.getZExtOrTrunc(MSWAsI64, dl, MVT::i32)));

    if (I != E) {
      // If only 1 GPR was available, there will only be one custom GPR and
      // the argument will also pass in memory.
      CCValAssign &PeekArg = ArgLocs[I];
      if (PeekArg.isRegLoc() && PeekArg.getValNo() == PeekArg.getValNo()) {
        assert(PeekArg.needsCustom() && "A second custom GPR is expected.")(static_cast <bool> (PeekArg.needsCustom() && "A second custom GPR is expected."
) ? void (0) : __assert_fail ("PeekArg.needsCustom() && \"A second custom GPR is expected.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7553, __extension__
 __PRETTY_FUNCTION__));
        CCValAssign &GPR2 = ArgLocs[I++];
        RegsToPass.push_back(std::make_pair(
            GPR2.getLocReg(), DAG.getZExtOrTrunc(ArgAsInt, dl, MVT::i32)));
      }
    }
  }
}

if (!MemOpChains.empty())
  Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);

// For indirect calls, we need to save the TOC base to the stack for
// restoration after the call.
if (CFlags.IsIndirect) {
  assert(!CFlags.IsTailCall && "Indirect tail-calls not supported.")(static_cast <bool> (!CFlags.IsTailCall && "Indirect tail-calls not supported."
) ? void (0) : __assert_fail ("!CFlags.IsTailCall && \"Indirect tail-calls not supported.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7568, __extension__
 __PRETTY_FUNCTION__));
  const MCRegister TOCBaseReg = Subtarget.getTOCPointerRegister();
  const MCRegister StackPtrReg = Subtarget.getStackPointerRegister();
  const MVT PtrVT = Subtarget.isPPC64() ? MVT::i64 : MVT::i32;
  const unsigned TOCSaveOffset =
      Subtarget.getFrameLowering()->getTOCSaveOffset();

  setUsesTOCBasePtr(DAG);
  SDValue Val = DAG.getCopyFromReg(Chain, dl, TOCBaseReg, PtrVT);
  SDValue PtrOff = DAG.getIntPtrConstant(TOCSaveOffset, dl);
  SDValue StackPtr = DAG.getRegister(StackPtrReg, PtrVT);
  SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
  Chain = DAG.getStore(
      Val.getValue(1), dl, Val, AddPtr,
      MachinePointerInfo::getStack(DAG.getMachineFunction(), TOCSaveOffset));
}

// Build a sequence of copy-to-reg nodes chained together with token chain
// and flag operands which copy the outgoing args into the appropriate regs.
SDValue InGlue;
for (auto Reg : RegsToPass) {
  Chain = DAG.getCopyToReg(Chain, dl, Reg.first, Reg.second, InGlue);
  InGlue = Chain.getValue(1);
}

const int SPDiff = 0;
return FinishCall(CFlags, dl, DAG, RegsToPass, InGlue, Chain, CallSeqStart,
                  Callee, SPDiff, NumBytes, Ins, InVals, CB);
7596}

7598bool
7599PPCTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
                                MachineFunction &MF, bool isVarArg,
                                const SmallVectorImpl<ISD::OutputArg> &Outs,
                                LLVMContext &Context) const {
SmallVector<CCValAssign, 16> RVLocs;
CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context);
return CCInfo.CheckReturn(
    Outs, (Subtarget.isSVR4ABI() && CallConv == CallingConv::Cold)
              ? RetCC_PPC_Cold
              : RetCC_PPC);
7609}

7611SDValue
7612PPCTargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv,
                             bool isVarArg,
                             const SmallVectorImpl<ISD::OutputArg> &Outs,
                             const SmallVectorImpl<SDValue> &OutVals,
                             const SDLoc &dl, SelectionDAG &DAG) const {
SmallVector<CCValAssign, 16> RVLocs;
CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
               *DAG.getContext());
CCInfo.AnalyzeReturn(Outs,
                     (Subtarget.isSVR4ABI() && CallConv == CallingConv::Cold)
                         ? RetCC_PPC_Cold
                         : RetCC_PPC);

SDValue Glue;
SmallVector<SDValue, 4> RetOps(1, Chain);

// Copy the result values into the output registers.
for (unsigned i = 0, RealResIdx = 0; i != RVLocs.size(); ++i, ++RealResIdx) {
  CCValAssign &VA = RVLocs[i];
  assert(VA.isRegLoc() && "Can only return in registers!")(static_cast <bool> (VA.isRegLoc() && "Can only return in registers!"
) ? void (0) : __assert_fail ("VA.isRegLoc() && \"Can only return in registers!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7631, __extension__
 __PRETTY_FUNCTION__));

  SDValue Arg = OutVals[RealResIdx];

  switch (VA.getLocInfo()) {
  default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7636);
  case CCValAssign::Full: break;
  case CCValAssign::AExt:
    Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
    break;
  case CCValAssign::ZExt:
    Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
    break;
  case CCValAssign::SExt:
    Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
    break;
  }
  if (Subtarget.hasSPE() && VA.getLocVT() == MVT::f64) {
    bool isLittleEndian = Subtarget.isLittleEndian();
    // Legalize ret f64 -> ret 2 x i32.
    SDValue SVal =
        DAG.getNode(PPCISD::EXTRACT_SPE, dl, MVT::i32, Arg,
                    DAG.getIntPtrConstant(isLittleEndian ? 0 : 1, dl));
    Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), SVal, Glue);
    RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
    SVal = DAG.getNode(PPCISD::EXTRACT_SPE, dl, MVT::i32, Arg,
                       DAG.getIntPtrConstant(isLittleEndian ? 1 : 0, dl));
    Glue = Chain.getValue(1);
    VA = RVLocs[++i]; // skip ahead to next loc
    Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), SVal, Glue);
  } else
    Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Glue);
  Glue = Chain.getValue(1);
  RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
}

RetOps[0] = Chain;  // Update chain.

// Add the glue if we have it.
if (Glue.getNode())
  RetOps.push_back(Glue);

return DAG.getNode(PPCISD::RET_GLUE, dl, MVT::Other, RetOps);
7674}

7676SDValue
7677PPCTargetLowering::LowerGET_DYNAMIC_AREA_OFFSET(SDValue Op,
                                              SelectionDAG &DAG) const {
SDLoc dl(Op);

// Get the correct type for integers.
EVT IntVT = Op.getValueType();

// Get the inputs.
SDValue Chain = Op.getOperand(0);
SDValue FPSIdx = getFramePointerFrameIndex(DAG);
// Build a DYNAREAOFFSET node.
SDValue Ops[2] = {Chain, FPSIdx};
SDVTList VTs = DAG.getVTList(IntVT);
return DAG.getNode(PPCISD::DYNAREAOFFSET, dl, VTs, Ops);
7691}

7693SDValue PPCTargetLowering::LowerSTACKRESTORE(SDValue Op,
                                           SelectionDAG &DAG) const {
// When we pop the dynamic allocation we need to restore the SP link.
SDLoc dl(Op);

// Get the correct type for pointers.
EVT PtrVT = getPointerTy(DAG.getDataLayout());

// Construct the stack pointer operand.
bool isPPC64 = Subtarget.isPPC64();
unsigned SP = isPPC64 ? PPC::X1 : PPC::R1;
SDValue StackPtr = DAG.getRegister(SP, PtrVT);

// Get the operands for the STACKRESTORE.
SDValue Chain = Op.getOperand(0);
SDValue SaveSP = Op.getOperand(1);

// Load the old link SP.
SDValue LoadLinkSP =
    DAG.getLoad(PtrVT, dl, Chain, StackPtr, MachinePointerInfo());

// Restore the stack pointer.
Chain = DAG.getCopyToReg(LoadLinkSP.getValue(1), dl, SP, SaveSP);

// Store the old link SP.
return DAG.getStore(Chain, dl, LoadLinkSP, StackPtr, MachinePointerInfo());
7719}

7721SDValue PPCTargetLowering::getReturnAddrFrameIndex(SelectionDAG &DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
bool isPPC64 = Subtarget.isPPC64();
EVT PtrVT = getPointerTy(MF.getDataLayout());

// Get current frame pointer save index.  The users of this index will be
// primarily DYNALLOC instructions.
PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
int RASI = FI->getReturnAddrSaveIndex();

// If the frame pointer save index hasn't been defined yet.
if (!RASI) {
  // Find out what the fix offset of the frame pointer save area.
  int LROffset = Subtarget.getFrameLowering()->getReturnSaveOffset();
  // Allocate the frame index for frame pointer save area.
  RASI = MF.getFrameInfo().CreateFixedObject(isPPC64? 8 : 4, LROffset, false);
  // Save the result.
  FI->setReturnAddrSaveIndex(RASI);
}
return DAG.getFrameIndex(RASI, PtrVT);
7741}

7743SDValue
7744PPCTargetLowering::getFramePointerFrameIndex(SelectionDAG & DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
bool isPPC64 = Subtarget.isPPC64();
EVT PtrVT = getPointerTy(MF.getDataLayout());

// Get current frame pointer save index.  The users of this index will be
// primarily DYNALLOC instructions.
PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
int FPSI = FI->getFramePointerSaveIndex();

// If the frame pointer save index hasn't been defined yet.
if (!FPSI) {
  // Find out what the fix offset of the frame pointer save area.
  int FPOffset = Subtarget.getFrameLowering()->getFramePointerSaveOffset();
  // Allocate the frame index for frame pointer save area.
  FPSI = MF.getFrameInfo().CreateFixedObject(isPPC64? 8 : 4, FPOffset, true);
  // Save the result.
  FI->setFramePointerSaveIndex(FPSI);
}
return DAG.getFrameIndex(FPSI, PtrVT);
7764}

7766SDValue PPCTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
                                                 SelectionDAG &DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
// Get the inputs.
SDValue Chain = Op.getOperand(0);
SDValue Size  = Op.getOperand(1);
SDLoc dl(Op);

// Get the correct type for pointers.
EVT PtrVT = getPointerTy(DAG.getDataLayout());
// Negate the size.
SDValue NegSize = DAG.getNode(ISD::SUB, dl, PtrVT,
                              DAG.getConstant(0, dl, PtrVT), Size);
// Construct a node for the frame pointer save index.
SDValue FPSIdx = getFramePointerFrameIndex(DAG);
SDValue Ops[3] = { Chain, NegSize, FPSIdx };
SDVTList VTs = DAG.getVTList(PtrVT, MVT::Other);
if (hasInlineStackProbe(MF))
  return DAG.getNode(PPCISD::PROBED_ALLOCA, dl, VTs, Ops);
return DAG.getNode(PPCISD::DYNALLOC, dl, VTs, Ops);
7786}

7788SDValue PPCTargetLowering::LowerEH_DWARF_CFA(SDValue Op,
                                                   SelectionDAG &DAG) const {
MachineFunction &MF = DAG.getMachineFunction();

bool isPPC64 = Subtarget.isPPC64();
EVT PtrVT = getPointerTy(DAG.getDataLayout());

int FI = MF.getFrameInfo().CreateFixedObject(isPPC64 ? 8 : 4, 0, false);
return DAG.getFrameIndex(FI, PtrVT);
7797}

7799SDValue PPCTargetLowering::lowerEH_SJLJ_SETJMP(SDValue Op,
                                             SelectionDAG &DAG) const {
SDLoc DL(Op);
return DAG.getNode(PPCISD::EH_SJLJ_SETJMP, DL,
                   DAG.getVTList(MVT::i32, MVT::Other),
                   Op.getOperand(0), Op.getOperand(1));
7805}

7807SDValue PPCTargetLowering::lowerEH_SJLJ_LONGJMP(SDValue Op,
                                              SelectionDAG &DAG) const {
SDLoc DL(Op);
return DAG.getNode(PPCISD::EH_SJLJ_LONGJMP, DL, MVT::Other,
                   Op.getOperand(0), Op.getOperand(1));
7812}

7814SDValue PPCTargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
if (Op.getValueType().isVector())
  return LowerVectorLoad(Op, DAG);

assert(Op.getValueType() == MVT::i1 &&(static_cast <bool> (Op.getValueType() == MVT::i1 &&
 "Custom lowering only for i1 loads") ? void (0) : __assert_fail
 ("Op.getValueType() == MVT::i1 && \"Custom lowering only for i1 loads\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7819, __extension__
 __PRETTY_FUNCTION__))
       "Custom lowering only for i1 loads")(static_cast <bool> (Op.getValueType() == MVT::i1 &&
 "Custom lowering only for i1 loads") ? void (0) : __assert_fail
 ("Op.getValueType() == MVT::i1 && \"Custom lowering only for i1 loads\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7819, __extension__
 __PRETTY_FUNCTION__));

// First, load 8 bits into 32 bits, then truncate to 1 bit.

SDLoc dl(Op);
LoadSDNode *LD = cast<LoadSDNode>(Op);

SDValue Chain = LD->getChain();
SDValue BasePtr = LD->getBasePtr();
MachineMemOperand *MMO = LD->getMemOperand();

SDValue NewLD =
    DAG.getExtLoad(ISD::EXTLOAD, dl, getPointerTy(DAG.getDataLayout()), Chain,
                   BasePtr, MVT::i8, MMO);
SDValue Result = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, NewLD);

SDValue Ops[] = { Result, SDValue(NewLD.getNode(), 1) };
return DAG.getMergeValues(Ops, dl);
7837}

7839SDValue PPCTargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
if (Op.getOperand(1).getValueType().isVector())
  return LowerVectorStore(Op, DAG);

assert(Op.getOperand(1).getValueType() == MVT::i1 &&(static_cast <bool> (Op.getOperand(1).getValueType() ==
 MVT::i1 && "Custom lowering only for i1 stores") ? void
 (0) : __assert_fail ("Op.getOperand(1).getValueType() == MVT::i1 && \"Custom lowering only for i1 stores\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7844, __extension__
 __PRETTY_FUNCTION__))
       "Custom lowering only for i1 stores")(static_cast <bool> (Op.getOperand(1).getValueType() ==
 MVT::i1 && "Custom lowering only for i1 stores") ? void
 (0) : __assert_fail ("Op.getOperand(1).getValueType() == MVT::i1 && \"Custom lowering only for i1 stores\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7844, __extension__
 __PRETTY_FUNCTION__));

// First, zero extend to 32 bits, then use a truncating store to 8 bits.

SDLoc dl(Op);
StoreSDNode *ST = cast<StoreSDNode>(Op);

SDValue Chain = ST->getChain();
SDValue BasePtr = ST->getBasePtr();
SDValue Value = ST->getValue();
MachineMemOperand *MMO = ST->getMemOperand();

Value = DAG.getNode(ISD::ZERO_EXTEND, dl, getPointerTy(DAG.getDataLayout()),
                    Value);
return DAG.getTruncStore(Chain, dl, Value, BasePtr, MVT::i8, MMO);
7859}

7861// FIXME: Remove this once the ANDI glue bug is fixed:
7862SDValue PPCTargetLowering::LowerTRUNCATE(SDValue Op, SelectionDAG &DAG) const {
assert(Op.getValueType() == MVT::i1 &&(static_cast <bool> (Op.getValueType() == MVT::i1 &&
 "Custom lowering only for i1 results") ? void (0) : __assert_fail
 ("Op.getValueType() == MVT::i1 && \"Custom lowering only for i1 results\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7864, __extension__
 __PRETTY_FUNCTION__))
       "Custom lowering only for i1 results")(static_cast <bool> (Op.getValueType() == MVT::i1 &&
 "Custom lowering only for i1 results") ? void (0) : __assert_fail
 ("Op.getValueType() == MVT::i1 && \"Custom lowering only for i1 results\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7864, __extension__
 __PRETTY_FUNCTION__));

SDLoc DL(Op);
return DAG.getNode(PPCISD::ANDI_rec_1_GT_BIT, DL, MVT::i1, Op.getOperand(0));
7868}

7870SDValue PPCTargetLowering::LowerTRUNCATEVector(SDValue Op,
                                             SelectionDAG &DAG) const {

// Implements a vector truncate that fits in a vector register as a shuffle.
// We want to legalize vector truncates down to where the source fits in
// a vector register (and target is therefore smaller than vector register
// size).  At that point legalization will try to custom lower the sub-legal
// result and get here - where we can contain the truncate as a single target
// operation.

// For example a trunc <2 x i16> to <2 x i8> could be visualized as follows:
//   <MSB1|LSB1, MSB2|LSB2> to <LSB1, LSB2>
//
// We will implement it for big-endian ordering as this (where x denotes
// undefined):
//   < MSB1|LSB1, MSB2|LSB2, uu, uu, uu, uu, uu, uu> to
//   < LSB1, LSB2, u, u, u, u, u, u, u, u, u, u, u, u, u, u>
//
// The same operation in little-endian ordering will be:
//   <uu, uu, uu, uu, uu, uu, LSB2|MSB2, LSB1|MSB1> to
//   <u, u, u, u, u, u, u, u, u, u, u, u, u, u, LSB2, LSB1>

EVT TrgVT = Op.getValueType();
assert(TrgVT.isVector() && "Vector type expected.")(static_cast <bool> (TrgVT.isVector() && "Vector type expected."
) ? void (0) : __assert_fail ("TrgVT.isVector() && \"Vector type expected.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 7893, __extension__
 __PRETTY_FUNCTION__));
unsigned TrgNumElts = TrgVT.getVectorNumElements();
EVT EltVT = TrgVT.getVectorElementType();
if (!isOperationCustom(Op.getOpcode(), TrgVT) ||
    TrgVT.getSizeInBits() > 128 || !isPowerOf2_32(TrgNumElts) ||
    !llvm::has_single_bit<uint32_t>(EltVT.getSizeInBits()))
  return SDValue();

SDValue N1 = Op.getOperand(0);
EVT SrcVT = N1.getValueType();  
unsigned SrcSize = SrcVT.getSizeInBits();
if (SrcSize > 256 || !isPowerOf2_32(SrcVT.getVectorNumElements()) ||
    !llvm::has_single_bit<uint32_t>(
        SrcVT.getVectorElementType().getSizeInBits()))
  return SDValue();
if (SrcSize == 256 && SrcVT.getVectorNumElements() < 2)
  return SDValue();

unsigned WideNumElts = 128 / EltVT.getSizeInBits();
EVT WideVT = EVT::getVectorVT(*DAG.getContext(), EltVT, WideNumElts);

SDLoc DL(Op);
SDValue Op1, Op2;
if (SrcSize == 256) {
  EVT VecIdxTy = getVectorIdxTy(DAG.getDataLayout());
  EVT SplitVT =
      N1.getValueType().getHalfNumVectorElementsVT(*DAG.getContext());
  unsigned SplitNumElts = SplitVT.getVectorNumElements();
  Op1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SplitVT, N1,
                    DAG.getConstant(0, DL, VecIdxTy));
  Op2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, SplitVT, N1,
                    DAG.getConstant(SplitNumElts, DL, VecIdxTy));
}
else {
  Op1 = SrcSize == 128 ? N1 : widenVec(DAG, N1, DL);
  Op2 = DAG.getUNDEF(WideVT);
}

// First list the elements we want to keep.
unsigned SizeMult = SrcSize / TrgVT.getSizeInBits();
SmallVector<int, 16> ShuffV;
if (Subtarget.isLittleEndian())
  for (unsigned i = 0; i < TrgNumElts; ++i)
    ShuffV.push_back(i * SizeMult);
else
  for (unsigned i = 1; i <= TrgNumElts; ++i)
    ShuffV.push_back(i * SizeMult - 1);

// Populate the remaining elements with undefs.
for (unsigned i = TrgNumElts; i < WideNumElts; ++i)
  // ShuffV.push_back(i + WideNumElts);
  ShuffV.push_back(WideNumElts + 1);

Op1 = DAG.getNode(ISD::BITCAST, DL, WideVT, Op1);
Op2 = DAG.getNode(ISD::BITCAST, DL, WideVT, Op2);
return DAG.getVectorShuffle(WideVT, DL, Op1, Op2, ShuffV);
7949}

7951/// LowerSELECT_CC - Lower floating point select_cc's into fsel instruction when
7952/// possible.
7953SDValue PPCTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
EVT ResVT = Op.getValueType();
EVT CmpVT = Op.getOperand(0).getValueType();
SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
SDValue TV  = Op.getOperand(2), FV  = Op.getOperand(3);
SDLoc dl(Op);

// Without power9-vector, we don't have native instruction for f128 comparison.
// Following transformation to libcall is needed for setcc:
// select_cc lhs, rhs, tv, fv, cc -> select_cc (setcc cc, x, y), 0, tv, fv, NE
if (!Subtarget.hasP9Vector() && CmpVT == MVT::f128) {
  SDValue Z = DAG.getSetCC(
      dl, getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), CmpVT),
      LHS, RHS, CC);
  SDValue Zero = DAG.getConstant(0, dl, Z.getValueType());
  return DAG.getSelectCC(dl, Z, Zero, TV, FV, ISD::SETNE);
}

// Not FP, or using SPE? Not a fsel.
if (!CmpVT.isFloatingPoint() || !TV.getValueType().isFloatingPoint() ||
    Subtarget.hasSPE())
  return Op;

SDNodeFlags Flags = Op.getNode()->getFlags();

// We have xsmaxc[dq]p/xsminc[dq]p which are OK to emit even in the
// presence of infinities.
if (Subtarget.hasP9Vector() && LHS == TV && RHS == FV) {
  switch (CC) {
  default:
    break;
  case ISD::SETOGT:
  case ISD::SETGT:
    return DAG.getNode(PPCISD::XSMAXC, dl, Op.getValueType(), LHS, RHS);
  case ISD::SETOLT:
  case ISD::SETLT:
    return DAG.getNode(PPCISD::XSMINC, dl, Op.getValueType(), LHS, RHS);
  }
}

// We might be able to do better than this under some circumstances, but in
// general, fsel-based lowering of select is a finite-math-only optimization.
// For more information, see section F.3 of the 2.06 ISA specification.
// With ISA 3.0
if ((!DAG.getTarget().Options.NoInfsFPMath && !Flags.hasNoInfs()) ||
    (!DAG.getTarget().Options.NoNaNsFPMath && !Flags.hasNoNaNs()))
  return Op;

// If the RHS of the comparison is a 0.0, we don't need to do the
// subtraction at all.
SDValue Sel1;
if (isFloatingPointZero(RHS))
  switch (CC) {
  default: break;       // SETUO etc aren't handled by fsel.
  case ISD::SETNE:
    std::swap(TV, FV);
    [[fallthrough]];
  case ISD::SETEQ:
    if (LHS.getValueType() == MVT::f32)   // Comparison is always 64-bits
      LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
    Sel1 = DAG.getNode(PPCISD::FSEL, dl, ResVT, LHS, TV, FV);
    if (Sel1.getValueType() == MVT::f32)   // Comparison is always 64-bits
      Sel1 = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Sel1);
    return DAG.getNode(PPCISD::FSEL, dl, ResVT,
                       DAG.getNode(ISD::FNEG, dl, MVT::f64, LHS), Sel1, FV);
  case ISD::SETULT:
  case ISD::SETLT:
    std::swap(TV, FV);  // fsel is natively setge, swap operands for setlt
    [[fallthrough]];
  case ISD::SETOGE:
  case ISD::SETGE:
    if (LHS.getValueType() == MVT::f32)   // Comparison is always 64-bits
      LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
    return DAG.getNode(PPCISD::FSEL, dl, ResVT, LHS, TV, FV);
  case ISD::SETUGT:
  case ISD::SETGT:
    std::swap(TV, FV);  // fsel is natively setge, swap operands for setlt
    [[fallthrough]];
  case ISD::SETOLE:
  case ISD::SETLE:
    if (LHS.getValueType() == MVT::f32)   // Comparison is always 64-bits
      LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
    return DAG.getNode(PPCISD::FSEL, dl, ResVT,
                       DAG.getNode(ISD::FNEG, dl, MVT::f64, LHS), TV, FV);
  }

SDValue Cmp;
switch (CC) {
default: break;       // SETUO etc aren't handled by fsel.
case ISD::SETNE:
  std::swap(TV, FV);
  [[fallthrough]];
case ISD::SETEQ:
  Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS, Flags);
  if (Cmp.getValueType() == MVT::f32)   // Comparison is always 64-bits
    Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
  Sel1 = DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
  if (Sel1.getValueType() == MVT::f32)   // Comparison is always 64-bits
    Sel1 = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Sel1);
  return DAG.getNode(PPCISD::FSEL, dl, ResVT,
                     DAG.getNode(ISD::FNEG, dl, MVT::f64, Cmp), Sel1, FV);
case ISD::SETULT:
case ISD::SETLT:
  Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS, Flags);
  if (Cmp.getValueType() == MVT::f32)   // Comparison is always 64-bits
    Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
  return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, FV, TV);
case ISD::SETOGE:
case ISD::SETGE:
  Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS, Flags);
  if (Cmp.getValueType() == MVT::f32)   // Comparison is always 64-bits
    Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
  return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
case ISD::SETUGT:
case ISD::SETGT:
  Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, RHS, LHS, Flags);
  if (Cmp.getValueType() == MVT::f32)   // Comparison is always 64-bits
    Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
  return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, FV, TV);
case ISD::SETOLE:
case ISD::SETLE:
  Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, RHS, LHS, Flags);
  if (Cmp.getValueType() == MVT::f32)   // Comparison is always 64-bits
    Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
  return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
}
return Op;
8081}

8083static unsigned getPPCStrictOpcode(unsigned Opc) {
switch (Opc) {
default:
  llvm_unreachable("No strict version of this opcode!")::llvm::llvm_unreachable_internal("No strict version of this opcode!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8086);
case PPCISD::FCTIDZ:
  return PPCISD::STRICT_FCTIDZ;
case PPCISD::FCTIWZ:
  return PPCISD::STRICT_FCTIWZ;
case PPCISD::FCTIDUZ:
  return PPCISD::STRICT_FCTIDUZ;
case PPCISD::FCTIWUZ:
  return PPCISD::STRICT_FCTIWUZ;
case PPCISD::FCFID:
  return PPCISD::STRICT_FCFID;
case PPCISD::FCFIDU:
  return PPCISD::STRICT_FCFIDU;
case PPCISD::FCFIDS:
  return PPCISD::STRICT_FCFIDS;
case PPCISD::FCFIDUS:
  return PPCISD::STRICT_FCFIDUS;
}
8104}

8106static SDValue convertFPToInt(SDValue Op, SelectionDAG &DAG,
                            const PPCSubtarget &Subtarget) {
SDLoc dl(Op);
bool IsStrict = Op->isStrictFPOpcode();
bool IsSigned = Op.getOpcode() == ISD::FP_TO_SINT ||
                Op.getOpcode() == ISD::STRICT_FP_TO_SINT;

// TODO: Any other flags to propagate?
SDNodeFlags Flags;
Flags.setNoFPExcept(Op->getFlags().hasNoFPExcept());

// For strict nodes, source is the second operand.
SDValue Src = Op.getOperand(IsStrict ? 1 : 0);
SDValue Chain = IsStrict ? Op.getOperand(0) : SDValue();
assert(Src.getValueType().isFloatingPoint())(static_cast <bool> (Src.getValueType().isFloatingPoint
()) ? void (0) : __assert_fail ("Src.getValueType().isFloatingPoint()"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8120, __extension__
 __PRETTY_FUNCTION__));
if (Src.getValueType() == MVT::f32) {
  if (IsStrict) {
    Src =
        DAG.getNode(ISD::STRICT_FP_EXTEND, dl,
                    DAG.getVTList(MVT::f64, MVT::Other), {Chain, Src}, Flags);
    Chain = Src.getValue(1);
  } else
    Src = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Src);
}
SDValue Conv;
unsigned Opc = ISD::DELETED_NODE;
switch (Op.getSimpleValueType().SimpleTy) {
default: llvm_unreachable("Unhandled FP_TO_INT type in custom expander!")::llvm::llvm_unreachable_internal("Unhandled FP_TO_INT type in custom expander!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8133);
case MVT::i32:
  Opc = IsSigned ? PPCISD::FCTIWZ
                 : (Subtarget.hasFPCVT() ? PPCISD::FCTIWUZ : PPCISD::FCTIDZ);
  break;
case MVT::i64:
  assert((IsSigned || Subtarget.hasFPCVT()) &&(static_cast <bool> ((IsSigned || Subtarget.hasFPCVT())
 && "i64 FP_TO_UINT is supported only with FPCVT") ? void
 (0) : __assert_fail ("(IsSigned || Subtarget.hasFPCVT()) && \"i64 FP_TO_UINT is supported only with FPCVT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8140, __extension__
 __PRETTY_FUNCTION__))
         "i64 FP_TO_UINT is supported only with FPCVT")(static_cast <bool> ((IsSigned || Subtarget.hasFPCVT())
 && "i64 FP_TO_UINT is supported only with FPCVT") ? void
 (0) : __assert_fail ("(IsSigned || Subtarget.hasFPCVT()) && \"i64 FP_TO_UINT is supported only with FPCVT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8140, __extension__
 __PRETTY_FUNCTION__));
  Opc = IsSigned ? PPCISD::FCTIDZ : PPCISD::FCTIDUZ;
}
if (IsStrict) {
  Opc = getPPCStrictOpcode(Opc);
  Conv = DAG.getNode(Opc, dl, DAG.getVTList(MVT::f64, MVT::Other),
                     {Chain, Src}, Flags);
} else {
  Conv = DAG.getNode(Opc, dl, MVT::f64, Src);
}
return Conv;
8151}

8153void PPCTargetLowering::LowerFP_TO_INTForReuse(SDValue Op, ReuseLoadInfo &RLI,
                                             SelectionDAG &DAG,
                                             const SDLoc &dl) const {
SDValue Tmp = convertFPToInt(Op, DAG, Subtarget);
bool IsSigned = Op.getOpcode() == ISD::FP_TO_SINT ||
                Op.getOpcode() == ISD::STRICT_FP_TO_SINT;
bool IsStrict = Op->isStrictFPOpcode();

// Convert the FP value to an int value through memory.
bool i32Stack = Op.getValueType() == MVT::i32 && Subtarget.hasSTFIWX() &&
                (IsSigned || Subtarget.hasFPCVT());
SDValue FIPtr = DAG.CreateStackTemporary(i32Stack ? MVT::i32 : MVT::f64);
int FI = cast<FrameIndexSDNode>(FIPtr)->getIndex();
MachinePointerInfo MPI =
    MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI);

// Emit a store to the stack slot.
SDValue Chain = IsStrict ? Tmp.getValue(1) : DAG.getEntryNode();
Align Alignment(DAG.getEVTAlign(Tmp.getValueType()));
if (i32Stack) {
  MachineFunction &MF = DAG.getMachineFunction();
  Alignment = Align(4);
  MachineMemOperand *MMO =
      MF.getMachineMemOperand(MPI, MachineMemOperand::MOStore, 4, Alignment);
  SDValue Ops[] = { Chain, Tmp, FIPtr };
  Chain = DAG.getMemIntrinsicNode(PPCISD::STFIWX, dl,
            DAG.getVTList(MVT::Other), Ops, MVT::i32, MMO);
} else
  Chain = DAG.getStore(Chain, dl, Tmp, FIPtr, MPI, Alignment);

// Result is a load from the stack slot.  If loading 4 bytes, make sure to
// add in a bias on big endian.
if (Op.getValueType() == MVT::i32 && !i32Stack) {
  FIPtr = DAG.getNode(ISD::ADD, dl, FIPtr.getValueType(), FIPtr,
                      DAG.getConstant(4, dl, FIPtr.getValueType()));
  MPI = MPI.getWithOffset(Subtarget.isLittleEndian() ? 0 : 4);
}

RLI.Chain = Chain;
RLI.Ptr = FIPtr;
RLI.MPI = MPI;
RLI.Alignment = Alignment;
8195}

8197/// Custom lowers floating point to integer conversions to use
8198/// the direct move instructions available in ISA 2.07 to avoid the
8199/// need for load/store combinations.
8200SDValue PPCTargetLowering::LowerFP_TO_INTDirectMove(SDValue Op,
                                                  SelectionDAG &DAG,
                                                  const SDLoc &dl) const {
SDValue Conv = convertFPToInt(Op, DAG, Subtarget);
SDValue Mov = DAG.getNode(PPCISD::MFVSR, dl, Op.getValueType(), Conv);
if (Op->isStrictFPOpcode())
  return DAG.getMergeValues({Mov, Conv.getValue(1)}, dl);
else
  return Mov;
8209}

8211SDValue PPCTargetLowering::LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG,
                                        const SDLoc &dl) const {
bool IsStrict = Op->isStrictFPOpcode();
bool IsSigned = Op.getOpcode() == ISD::FP_TO_SINT ||
                Op.getOpcode() == ISD::STRICT_FP_TO_SINT;
SDValue Src = Op.getOperand(IsStrict ? 1 : 0);
EVT SrcVT = Src.getValueType();
EVT DstVT = Op.getValueType();

// FP to INT conversions are legal for f128.
if (SrcVT == MVT::f128)
  return Subtarget.hasP9Vector() ? Op : SDValue();

// Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
// PPC (the libcall is not available).
if (SrcVT == MVT::ppcf128) {
  if (DstVT == MVT::i32) {
    // TODO: Conservatively pass only nofpexcept flag here. Need to check and
    // set other fast-math flags to FP operations in both strict and
    // non-strict cases. (FP_TO_SINT, FSUB)
    SDNodeFlags Flags;
    Flags.setNoFPExcept(Op->getFlags().hasNoFPExcept());

    if (IsSigned) {
      SDValue Lo, Hi;
      std::tie(Lo, Hi) = DAG.SplitScalar(Src, dl, MVT::f64, MVT::f64);

      // Add the two halves of the long double in round-to-zero mode, and use
      // a smaller FP_TO_SINT.
      if (IsStrict) {
        SDValue Res = DAG.getNode(PPCISD::STRICT_FADDRTZ, dl,
                                  DAG.getVTList(MVT::f64, MVT::Other),
                                  {Op.getOperand(0), Lo, Hi}, Flags);
        return DAG.getNode(ISD::STRICT_FP_TO_SINT, dl,
                           DAG.getVTList(MVT::i32, MVT::Other),
                           {Res.getValue(1), Res}, Flags);
      } else {
        SDValue Res = DAG.getNode(PPCISD::FADDRTZ, dl, MVT::f64, Lo, Hi);
        return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
      }
    } else {
      const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
      APFloat APF = APFloat(APFloat::PPCDoubleDouble(), APInt(128, TwoE31));
      SDValue Cst = DAG.getConstantFP(APF, dl, SrcVT);
      SDValue SignMask = DAG.getConstant(0x80000000, dl, DstVT);
      if (IsStrict) {
        // Sel = Src < 0x80000000
        // FltOfs = select Sel, 0.0, 0x80000000
        // IntOfs = select Sel, 0, 0x80000000
        // Result = fp_to_sint(Src - FltOfs) ^ IntOfs
        SDValue Chain = Op.getOperand(0);
        EVT SetCCVT =
            getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), SrcVT);
        EVT DstSetCCVT =
            getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), DstVT);
        SDValue Sel = DAG.getSetCC(dl, SetCCVT, Src, Cst, ISD::SETLT,
                                   Chain, true);
        Chain = Sel.getValue(1);

        SDValue FltOfs = DAG.getSelect(
            dl, SrcVT, Sel, DAG.getConstantFP(0.0, dl, SrcVT), Cst);
        Sel = DAG.getBoolExtOrTrunc(Sel, dl, DstSetCCVT, DstVT);

        SDValue Val = DAG.getNode(ISD::STRICT_FSUB, dl,
                                  DAG.getVTList(SrcVT, MVT::Other),
                                  {Chain, Src, FltOfs}, Flags);
        Chain = Val.getValue(1);
        SDValue SInt = DAG.getNode(ISD::STRICT_FP_TO_SINT, dl,
                                   DAG.getVTList(DstVT, MVT::Other),
                                   {Chain, Val}, Flags);
        Chain = SInt.getValue(1);
        SDValue IntOfs = DAG.getSelect(
            dl, DstVT, Sel, DAG.getConstant(0, dl, DstVT), SignMask);
        SDValue Result = DAG.getNode(ISD::XOR, dl, DstVT, SInt, IntOfs);
        return DAG.getMergeValues({Result, Chain}, dl);
      } else {
        // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
        // FIXME: generated code sucks.
        SDValue True = DAG.getNode(ISD::FSUB, dl, MVT::ppcf128, Src, Cst);
        True = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, True);
        True = DAG.getNode(ISD::ADD, dl, MVT::i32, True, SignMask);
        SDValue False = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Src);
        return DAG.getSelectCC(dl, Src, Cst, True, False, ISD::SETGE);
      }
    }
  }

  return SDValue();
}

if (Subtarget.hasDirectMove() && Subtarget.isPPC64())
  return LowerFP_TO_INTDirectMove(Op, DAG, dl);

ReuseLoadInfo RLI;
LowerFP_TO_INTForReuse(Op, RLI, DAG, dl);

return DAG.getLoad(Op.getValueType(), dl, RLI.Chain, RLI.Ptr, RLI.MPI,
                   RLI.Alignment, RLI.MMOFlags(), RLI.AAInfo, RLI.Ranges);
8309}

8311// We're trying to insert a regular store, S, and then a load, L. If the
8312// incoming value, O, is a load, we might just be able to have our load use the
8313// address used by O. However, we don't know if anything else will store to
8314// that address before we can load from it. To prevent this situation, we need
8315// to insert our load, L, into the chain as a peer of O. To do this, we give L
8316// the same chain operand as O, we create a token factor from the chain results
8317// of O and L, and we replace all uses of O's chain result with that token
8318// factor (see spliceIntoChain below for this last part).
8319bool PPCTargetLowering::canReuseLoadAddress(SDValue Op, EVT MemVT,
                                          ReuseLoadInfo &RLI,
                                          SelectionDAG &DAG,
                                          ISD::LoadExtType ET) const {
// Conservatively skip reusing for constrained FP nodes.
if (Op->isStrictFPOpcode())
  return false;

SDLoc dl(Op);
bool ValidFPToUint = Op.getOpcode() == ISD::FP_TO_UINT &&
                     (Subtarget.hasFPCVT() || Op.getValueType() == MVT::i32);
if (ET == ISD::NON_EXTLOAD &&
    (ValidFPToUint || Op.getOpcode() == ISD::FP_TO_SINT) &&
    isOperationLegalOrCustom(Op.getOpcode(),
                             Op.getOperand(0).getValueType())) {

  LowerFP_TO_INTForReuse(Op, RLI, DAG, dl);
  return true;
}

LoadSDNode *LD = dyn_cast<LoadSDNode>(Op);
if (!LD || LD->getExtensionType() != ET || LD->isVolatile() ||
    LD->isNonTemporal())
  return false;
if (LD->getMemoryVT() != MemVT)
  return false;

// If the result of the load is an illegal type, then we can't build a
// valid chain for reuse since the legalised loads and token factor node that
// ties the legalised loads together uses a different output chain then the
// illegal load.
if (!isTypeLegal(LD->getValueType(0)))
  return false;

RLI.Ptr = LD->getBasePtr();
if (LD->isIndexed() && !LD->getOffset().isUndef()) {
  assert(LD->getAddressingMode() == ISD::PRE_INC &&(static_cast <bool> (LD->getAddressingMode() == ISD::
PRE_INC && "Non-pre-inc AM on PPC?") ? void (0) : __assert_fail
 ("LD->getAddressingMode() == ISD::PRE_INC && \"Non-pre-inc AM on PPC?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8356, __extension__
 __PRETTY_FUNCTION__))
         "Non-pre-inc AM on PPC?")(static_cast <bool> (LD->getAddressingMode() == ISD::
PRE_INC && "Non-pre-inc AM on PPC?") ? void (0) : __assert_fail
 ("LD->getAddressingMode() == ISD::PRE_INC && \"Non-pre-inc AM on PPC?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8356, __extension__
 __PRETTY_FUNCTION__));
  RLI.Ptr = DAG.getNode(ISD::ADD, dl, RLI.Ptr.getValueType(), RLI.Ptr,
                        LD->getOffset());
}

RLI.Chain = LD->getChain();
RLI.MPI = LD->getPointerInfo();
RLI.IsDereferenceable = LD->isDereferenceable();
RLI.IsInvariant = LD->isInvariant();
RLI.Alignment = LD->getAlign();
RLI.AAInfo = LD->getAAInfo();
RLI.Ranges = LD->getRanges();

RLI.ResChain = SDValue(LD, LD->isIndexed() ? 2 : 1);
return true;
8371}

8373// Given the head of the old chain, ResChain, insert a token factor containing
8374// it and NewResChain, and make users of ResChain now be users of that token
8375// factor.
8376// TODO: Remove and use DAG::makeEquivalentMemoryOrdering() instead.
8377void PPCTargetLowering::spliceIntoChain(SDValue ResChain,
                                      SDValue NewResChain,
                                      SelectionDAG &DAG) const {
if (!ResChain)
  return;

SDLoc dl(NewResChain);

SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
                         NewResChain, DAG.getUNDEF(MVT::Other));
assert(TF.getNode() != NewResChain.getNode() &&(static_cast <bool> (TF.getNode() != NewResChain.getNode
() && "A new TF really is required here") ? void (0) :
 __assert_fail ("TF.getNode() != NewResChain.getNode() && \"A new TF really is required here\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8388, __extension__
 __PRETTY_FUNCTION__))
       "A new TF really is required here")(static_cast <bool> (TF.getNode() != NewResChain.getNode
() && "A new TF really is required here") ? void (0) :
 __assert_fail ("TF.getNode() != NewResChain.getNode() && \"A new TF really is required here\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8388, __extension__
 __PRETTY_FUNCTION__));

DAG.ReplaceAllUsesOfValueWith(ResChain, TF);
DAG.UpdateNodeOperands(TF.getNode(), ResChain, NewResChain);
8392}

8394/// Analyze profitability of direct move
8395/// prefer float load to int load plus direct move
8396/// when there is no integer use of int load
8397bool PPCTargetLowering::directMoveIsProfitable(const SDValue &Op) const {
SDNode *Origin = Op.getOperand(Op->isStrictFPOpcode() ? 1 : 0).getNode();
if (Origin->getOpcode() != ISD::LOAD)
  return true;

// If there is no LXSIBZX/LXSIHZX, like Power8,
// prefer direct move if the memory size is 1 or 2 bytes.
MachineMemOperand *MMO = cast<LoadSDNode>(Origin)->getMemOperand();
if (!Subtarget.hasP9Vector() && MMO->getSize() <= 2)
  return true;

for (SDNode::use_iterator UI = Origin->use_begin(),
                          UE = Origin->use_end();
     UI != UE; ++UI) {

  // Only look at the users of the loaded value.
  if (UI.getUse().get().getResNo() != 0)
    continue;

  if (UI->getOpcode() != ISD::SINT_TO_FP &&
      UI->getOpcode() != ISD::UINT_TO_FP &&
      UI->getOpcode() != ISD::STRICT_SINT_TO_FP &&
      UI->getOpcode() != ISD::STRICT_UINT_TO_FP)
    return true;
}

return false;
8424}

8426static SDValue convertIntToFP(SDValue Op, SDValue Src, SelectionDAG &DAG,
                            const PPCSubtarget &Subtarget,
                            SDValue Chain = SDValue()) {
bool IsSigned = Op.getOpcode() == ISD::SINT_TO_FP ||
                Op.getOpcode() == ISD::STRICT_SINT_TO_FP;
SDLoc dl(Op);

// TODO: Any other flags to propagate?
SDNodeFlags Flags;
Flags.setNoFPExcept(Op->getFlags().hasNoFPExcept());

// If we have FCFIDS, then use it when converting to single-precision.
// Otherwise, convert to double-precision and then round.
bool IsSingle = Op.getValueType() == MVT::f32 && Subtarget.hasFPCVT();
unsigned ConvOpc = IsSingle ? (IsSigned ? PPCISD::FCFIDS : PPCISD::FCFIDUS)
                            : (IsSigned ? PPCISD::FCFID : PPCISD::FCFIDU);
EVT ConvTy = IsSingle ? MVT::f32 : MVT::f64;
if (Op->isStrictFPOpcode()) {
  if (!Chain)
    Chain = Op.getOperand(0);
  return DAG.getNode(getPPCStrictOpcode(ConvOpc), dl,
                     DAG.getVTList(ConvTy, MVT::Other), {Chain, Src}, Flags);
} else
  return DAG.getNode(ConvOpc, dl, ConvTy, Src);
8450}

8452/// Custom lowers integer to floating point conversions to use
8453/// the direct move instructions available in ISA 2.07 to avoid the
8454/// need for load/store combinations.
8455SDValue PPCTargetLowering::LowerINT_TO_FPDirectMove(SDValue Op,
                                                  SelectionDAG &DAG,
                                                  const SDLoc &dl) const {
assert((Op.getValueType() == MVT::f32 ||(static_cast <bool> ((Op.getValueType() == MVT::f32 || Op
.getValueType() == MVT::f64) && "Invalid floating point type as target of conversion"
) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) && \"Invalid floating point type as target of conversion\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8460, __extension__
 __PRETTY_FUNCTION__))
        Op.getValueType() == MVT::f64) &&(static_cast <bool> ((Op.getValueType() == MVT::f32 || Op
.getValueType() == MVT::f64) && "Invalid floating point type as target of conversion"
) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) && \"Invalid floating point type as target of conversion\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8460, __extension__
 __PRETTY_FUNCTION__))
       "Invalid floating point type as target of conversion")(static_cast <bool> ((Op.getValueType() == MVT::f32 || Op
.getValueType() == MVT::f64) && "Invalid floating point type as target of conversion"
) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) && \"Invalid floating point type as target of conversion\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8460, __extension__
 __PRETTY_FUNCTION__));
assert(Subtarget.hasFPCVT() &&(static_cast <bool> (Subtarget.hasFPCVT() && "Int to FP conversions with direct moves require FPCVT"
) ? void (0) : __assert_fail ("Subtarget.hasFPCVT() && \"Int to FP conversions with direct moves require FPCVT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8462, __extension__
 __PRETTY_FUNCTION__))
       "Int to FP conversions with direct moves require FPCVT")(static_cast <bool> (Subtarget.hasFPCVT() && "Int to FP conversions with direct moves require FPCVT"
) ? void (0) : __assert_fail ("Subtarget.hasFPCVT() && \"Int to FP conversions with direct moves require FPCVT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8462, __extension__
 __PRETTY_FUNCTION__));
SDValue Src = Op.getOperand(Op->isStrictFPOpcode() ? 1 : 0);
bool WordInt = Src.getSimpleValueType().SimpleTy == MVT::i32;
bool Signed = Op.getOpcode() == ISD::SINT_TO_FP ||
              Op.getOpcode() == ISD::STRICT_SINT_TO_FP;
unsigned MovOpc = (WordInt && !Signed) ? PPCISD::MTVSRZ : PPCISD::MTVSRA;
SDValue Mov = DAG.getNode(MovOpc, dl, MVT::f64, Src);
return convertIntToFP(Op, Mov, DAG, Subtarget);
8470}

8472static SDValue widenVec(SelectionDAG &DAG, SDValue Vec, const SDLoc &dl) {

EVT VecVT = Vec.getValueType();
assert(VecVT.isVector() && "Expected a vector type.")(static_cast <bool> (VecVT.isVector() && "Expected a vector type."
) ? void (0) : __assert_fail ("VecVT.isVector() && \"Expected a vector type.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8475, __extension__
 __PRETTY_FUNCTION__));
assert(VecVT.getSizeInBits() < 128 && "Vector is already full width.")(static_cast <bool> (VecVT.getSizeInBits() < 128 &&
 "Vector is already full width.") ? void (0) : __assert_fail (
"VecVT.getSizeInBits() < 128 && \"Vector is already full width.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8476, __extension__
 __PRETTY_FUNCTION__));

EVT EltVT = VecVT.getVectorElementType();
unsigned WideNumElts = 128 / EltVT.getSizeInBits();
EVT WideVT = EVT::getVectorVT(*DAG.getContext(), EltVT, WideNumElts);

unsigned NumConcat = WideNumElts / VecVT.getVectorNumElements();
SmallVector<SDValue, 16> Ops(NumConcat);
Ops[0] = Vec;
SDValue UndefVec = DAG.getUNDEF(VecVT);
for (unsigned i = 1; i < NumConcat; ++i)
  Ops[i] = UndefVec;

return DAG.getNode(ISD::CONCAT_VECTORS, dl, WideVT, Ops);
8490}

8492SDValue PPCTargetLowering::LowerINT_TO_FPVector(SDValue Op, SelectionDAG &DAG,
                                              const SDLoc &dl) const {
bool IsStrict = Op->isStrictFPOpcode();
unsigned Opc = Op.getOpcode();
SDValue Src = Op.getOperand(IsStrict ? 1 : 0);
assert((Opc == ISD::UINT_TO_FP || Opc == ISD::SINT_TO_FP ||(static_cast <bool> ((Opc == ISD::UINT_TO_FP || Opc == ISD
::SINT_TO_FP || Opc == ISD::STRICT_UINT_TO_FP || Opc == ISD::
STRICT_SINT_TO_FP) && "Unexpected conversion type") ?
 void (0) : __assert_fail ("(Opc == ISD::UINT_TO_FP || Opc == ISD::SINT_TO_FP || Opc == ISD::STRICT_UINT_TO_FP || Opc == ISD::STRICT_SINT_TO_FP) && \"Unexpected conversion type\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8499, __extension__
 __PRETTY_FUNCTION__))
        Opc == ISD::STRICT_UINT_TO_FP || Opc == ISD::STRICT_SINT_TO_FP) &&(static_cast <bool> ((Opc == ISD::UINT_TO_FP || Opc == ISD
::SINT_TO_FP || Opc == ISD::STRICT_UINT_TO_FP || Opc == ISD::
STRICT_SINT_TO_FP) && "Unexpected conversion type") ?
 void (0) : __assert_fail ("(Opc == ISD::UINT_TO_FP || Opc == ISD::SINT_TO_FP || Opc == ISD::STRICT_UINT_TO_FP || Opc == ISD::STRICT_SINT_TO_FP) && \"Unexpected conversion type\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8499, __extension__
 __PRETTY_FUNCTION__))
       "Unexpected conversion type")(static_cast <bool> ((Opc == ISD::UINT_TO_FP || Opc == ISD
::SINT_TO_FP || Opc == ISD::STRICT_UINT_TO_FP || Opc == ISD::
STRICT_SINT_TO_FP) && "Unexpected conversion type") ?
 void (0) : __assert_fail ("(Opc == ISD::UINT_TO_FP || Opc == ISD::SINT_TO_FP || Opc == ISD::STRICT_UINT_TO_FP || Opc == ISD::STRICT_SINT_TO_FP) && \"Unexpected conversion type\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8499, __extension__
 __PRETTY_FUNCTION__));
assert((Op.getValueType() == MVT::v2f64 || Op.getValueType() == MVT::v4f32) &&(static_cast <bool> ((Op.getValueType() == MVT::v2f64 ||
 Op.getValueType() == MVT::v4f32) && "Supports conversions to v2f64/v4f32 only."
) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::v2f64 || Op.getValueType() == MVT::v4f32) && \"Supports conversions to v2f64/v4f32 only.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8501, __extension__
 __PRETTY_FUNCTION__))
       "Supports conversions to v2f64/v4f32 only.")(static_cast <bool> ((Op.getValueType() == MVT::v2f64 ||
 Op.getValueType() == MVT::v4f32) && "Supports conversions to v2f64/v4f32 only."
) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::v2f64 || Op.getValueType() == MVT::v4f32) && \"Supports conversions to v2f64/v4f32 only.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8501, __extension__
 __PRETTY_FUNCTION__));

// TODO: Any other flags to propagate?
SDNodeFlags Flags;
Flags.setNoFPExcept(Op->getFlags().hasNoFPExcept());

bool SignedConv = Opc == ISD::SINT_TO_FP || Opc == ISD::STRICT_SINT_TO_FP;
bool FourEltRes = Op.getValueType() == MVT::v4f32;

SDValue Wide = widenVec(DAG, Src, dl);
EVT WideVT = Wide.getValueType();
unsigned WideNumElts = WideVT.getVectorNumElements();
MVT IntermediateVT = FourEltRes ? MVT::v4i32 : MVT::v2i64;

SmallVector<int, 16> ShuffV;
for (unsigned i = 0; i < WideNumElts; ++i)
  ShuffV.push_back(i + WideNumElts);

int Stride = FourEltRes ? WideNumElts / 4 : WideNumElts / 2;
int SaveElts = FourEltRes ? 4 : 2;
if (Subtarget.isLittleEndian())
  for (int i = 0; i < SaveElts; i++)
    ShuffV[i * Stride] = i;
else
  for (int i = 1; i <= SaveElts; i++)
    ShuffV[i * Stride - 1] = i - 1;

SDValue ShuffleSrc2 =
    SignedConv ? DAG.getUNDEF(WideVT) : DAG.getConstant(0, dl, WideVT);
SDValue Arrange = DAG.getVectorShuffle(WideVT, dl, Wide, ShuffleSrc2, ShuffV);

SDValue Extend;
if (SignedConv) {
  Arrange = DAG.getBitcast(IntermediateVT, Arrange);
  EVT ExtVT = Src.getValueType();
  if (Subtarget.hasP9Altivec())
    ExtVT = EVT::getVectorVT(*DAG.getContext(), WideVT.getVectorElementType(),
                             IntermediateVT.getVectorNumElements());

  Extend = DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, IntermediateVT, Arrange,
                       DAG.getValueType(ExtVT));
} else
  Extend = DAG.getNode(ISD::BITCAST, dl, IntermediateVT, Arrange);

if (IsStrict)
  return DAG.getNode(Opc, dl, DAG.getVTList(Op.getValueType(), MVT::Other),
                     {Op.getOperand(0), Extend}, Flags);

return DAG.getNode(Opc, dl, Op.getValueType(), Extend);
8550}

8552SDValue PPCTargetLowering::LowerINT_TO_FP(SDValue Op,
                                        SelectionDAG &DAG) const {
SDLoc dl(Op);
bool IsSigned = Op.getOpcode() == ISD::SINT_TO_FP ||
                Op.getOpcode() == ISD::STRICT_SINT_TO_FP;
bool IsStrict = Op->isStrictFPOpcode();
SDValue Src = Op.getOperand(IsStrict ? 1 : 0);
SDValue Chain = IsStrict ? Op.getOperand(0) : DAG.getEntryNode();

// TODO: Any other flags to propagate?
SDNodeFlags Flags;
Flags.setNoFPExcept(Op->getFlags().hasNoFPExcept());

EVT InVT = Src.getValueType();
EVT OutVT = Op.getValueType();
if (OutVT.isVector() && OutVT.isFloatingPoint() &&
    isOperationCustom(Op.getOpcode(), InVT))
  return LowerINT_TO_FPVector(Op, DAG, dl);

// Conversions to f128 are legal.
if (Op.getValueType() == MVT::f128)
  return Subtarget.hasP9Vector() ? Op : SDValue();

// Don't handle ppc_fp128 here; let it be lowered to a libcall.
if (Op.getValueType() != MVT::f32 && Op.getValueType() != MVT::f64)
  return SDValue();

if (Src.getValueType() == MVT::i1) {
  SDValue Sel = DAG.getNode(ISD::SELECT, dl, Op.getValueType(), Src,
                            DAG.getConstantFP(1.0, dl, Op.getValueType()),
                            DAG.getConstantFP(0.0, dl, Op.getValueType()));
  if (IsStrict)
    return DAG.getMergeValues({Sel, Chain}, dl);
  else
    return Sel;
}

// If we have direct moves, we can do all the conversion, skip the store/load
// however, without FPCVT we can't do most conversions.
if (Subtarget.hasDirectMove() && directMoveIsProfitable(Op) &&
    Subtarget.isPPC64() && Subtarget.hasFPCVT())
  return LowerINT_TO_FPDirectMove(Op, DAG, dl);

assert((IsSigned || Subtarget.hasFPCVT()) &&(static_cast <bool> ((IsSigned || Subtarget.hasFPCVT())
 && "UINT_TO_FP is supported only with FPCVT") ? void
 (0) : __assert_fail ("(IsSigned || Subtarget.hasFPCVT()) && \"UINT_TO_FP is supported only with FPCVT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8596, __extension__
 __PRETTY_FUNCTION__))
       "UINT_TO_FP is supported only with FPCVT")(static_cast <bool> ((IsSigned || Subtarget.hasFPCVT())
 && "UINT_TO_FP is supported only with FPCVT") ? void
 (0) : __assert_fail ("(IsSigned || Subtarget.hasFPCVT()) && \"UINT_TO_FP is supported only with FPCVT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8596, __extension__
 __PRETTY_FUNCTION__));

if (Src.getValueType() == MVT::i64) {
  SDValue SINT = Src;
  // When converting to single-precision, we actually need to convert
  // to double-precision first and then round to single-precision.
  // To avoid double-rounding effects during that operation, we have
  // to prepare the input operand.  Bits that might be truncated when
  // converting to double-precision are replaced by a bit that won't
  // be lost at this stage, but is below the single-precision rounding
  // position.
  //
  // However, if -enable-unsafe-fp-math is in effect, accept double
  // rounding to avoid the extra overhead.
  if (Op.getValueType() == MVT::f32 &&
      !Subtarget.hasFPCVT() &&
      !DAG.getTarget().Options.UnsafeFPMath) {

    // Twiddle input to make sure the low 11 bits are zero.  (If this
    // is the case, we are guaranteed the value will fit into the 53 bit
    // mantissa of an IEEE double-precision value without rounding.)
    // If any of those low 11 bits were not zero originally, make sure
    // bit 12 (value 2048) is set instead, so that the final rounding
    // to single-precision gets the correct result.
    SDValue Round = DAG.getNode(ISD::AND, dl, MVT::i64,
                                SINT, DAG.getConstant(2047, dl, MVT::i64));
    Round = DAG.getNode(ISD::ADD, dl, MVT::i64,
                        Round, DAG.getConstant(2047, dl, MVT::i64));
    Round = DAG.getNode(ISD::OR, dl, MVT::i64, Round, SINT);
    Round = DAG.getNode(ISD::AND, dl, MVT::i64,
                        Round, DAG.getConstant(-2048, dl, MVT::i64));

    // However, we cannot use that value unconditionally: if the magnitude
    // of the input value is small, the bit-twiddling we did above might
    // end up visibly changing the output.  Fortunately, in that case, we
    // don't need to twiddle bits since the original input will convert
    // exactly to double-precision floating-point already.  Therefore,
    // construct a conditional to use the original value if the top 11
    // bits are all sign-bit copies, and use the rounded value computed
    // above otherwise.
    SDValue Cond = DAG.getNode(ISD::SRA, dl, MVT::i64,
                               SINT, DAG.getConstant(53, dl, MVT::i32));
    Cond = DAG.getNode(ISD::ADD, dl, MVT::i64,
                       Cond, DAG.getConstant(1, dl, MVT::i64));
    Cond = DAG.getSetCC(
        dl,
        getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), MVT::i64),
        Cond, DAG.getConstant(1, dl, MVT::i64), ISD::SETUGT);

    SINT = DAG.getNode(ISD::SELECT, dl, MVT::i64, Cond, Round, SINT);
  }

  ReuseLoadInfo RLI;
  SDValue Bits;

  MachineFunction &MF = DAG.getMachineFunction();
  if (canReuseLoadAddress(SINT, MVT::i64, RLI, DAG)) {
    Bits = DAG.getLoad(MVT::f64, dl, RLI.Chain, RLI.Ptr, RLI.MPI,
                       RLI.Alignment, RLI.MMOFlags(), RLI.AAInfo, RLI.Ranges);
    spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
  } else if (Subtarget.hasLFIWAX() &&
             canReuseLoadAddress(SINT, MVT::i32, RLI, DAG, ISD::SEXTLOAD)) {
    MachineMemOperand *MMO =
      MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
                              RLI.Alignment, RLI.AAInfo, RLI.Ranges);
    SDValue Ops[] = { RLI.Chain, RLI.Ptr };
    Bits = DAG.getMemIntrinsicNode(PPCISD::LFIWAX, dl,
                                   DAG.getVTList(MVT::f64, MVT::Other),
                                   Ops, MVT::i32, MMO);
    spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
  } else if (Subtarget.hasFPCVT() &&
             canReuseLoadAddress(SINT, MVT::i32, RLI, DAG, ISD::ZEXTLOAD)) {
    MachineMemOperand *MMO =
      MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
                              RLI.Alignment, RLI.AAInfo, RLI.Ranges);
    SDValue Ops[] = { RLI.Chain, RLI.Ptr };
    Bits = DAG.getMemIntrinsicNode(PPCISD::LFIWZX, dl,
                                   DAG.getVTList(MVT::f64, MVT::Other),
                                   Ops, MVT::i32, MMO);
    spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
  } else if (((Subtarget.hasLFIWAX() &&
               SINT.getOpcode() == ISD::SIGN_EXTEND) ||
              (Subtarget.hasFPCVT() &&
               SINT.getOpcode() == ISD::ZERO_EXTEND)) &&
             SINT.getOperand(0).getValueType() == MVT::i32) {
    MachineFrameInfo &MFI = MF.getFrameInfo();
    EVT PtrVT = getPointerTy(DAG.getDataLayout());

    int FrameIdx = MFI.CreateStackObject(4, Align(4), false);
    SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);

    SDValue Store = DAG.getStore(Chain, dl, SINT.getOperand(0), FIdx,
                                 MachinePointerInfo::getFixedStack(
                                     DAG.getMachineFunction(), FrameIdx));
    Chain = Store;

    assert(cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 &&(static_cast <bool> (cast<StoreSDNode>(Store)->
getMemoryVT() == MVT::i32 && "Expected an i32 store")
 ? void (0) : __assert_fail ("cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 && \"Expected an i32 store\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8693, __extension__
 __PRETTY_FUNCTION__))
           "Expected an i32 store")(static_cast <bool> (cast<StoreSDNode>(Store)->
getMemoryVT() == MVT::i32 && "Expected an i32 store")
 ? void (0) : __assert_fail ("cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 && \"Expected an i32 store\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8693, __extension__
 __PRETTY_FUNCTION__));

    RLI.Ptr = FIdx;
    RLI.Chain = Chain;
    RLI.MPI =
        MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx);
    RLI.Alignment = Align(4);

    MachineMemOperand *MMO =
      MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
                              RLI.Alignment, RLI.AAInfo, RLI.Ranges);
    SDValue Ops[] = { RLI.Chain, RLI.Ptr };
    Bits = DAG.getMemIntrinsicNode(SINT.getOpcode() == ISD::ZERO_EXTEND ?
                                   PPCISD::LFIWZX : PPCISD::LFIWAX,
                                   dl, DAG.getVTList(MVT::f64, MVT::Other),
                                   Ops, MVT::i32, MMO);
    Chain = Bits.getValue(1);
  } else
    Bits = DAG.getNode(ISD::BITCAST, dl, MVT::f64, SINT);

  SDValue FP = convertIntToFP(Op, Bits, DAG, Subtarget, Chain);
  if (IsStrict)
    Chain = FP.getValue(1);

  if (Op.getValueType() == MVT::f32 && !Subtarget.hasFPCVT()) {
    if (IsStrict)
      FP = DAG.getNode(ISD::STRICT_FP_ROUND, dl,
                       DAG.getVTList(MVT::f32, MVT::Other),
                       {Chain, FP, DAG.getIntPtrConstant(0, dl)}, Flags);
    else
      FP = DAG.getNode(ISD::FP_ROUND, dl, MVT::f32, FP,
                       DAG.getIntPtrConstant(0, dl, /*isTarget=*/true));
  }
  return FP;
}

assert(Src.getValueType() == MVT::i32 &&(static_cast <bool> (Src.getValueType() == MVT::i32 &&
 "Unhandled INT_TO_FP type in custom expander!") ? void (0) :
 __assert_fail ("Src.getValueType() == MVT::i32 && \"Unhandled INT_TO_FP type in custom expander!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8730, __extension__
 __PRETTY_FUNCTION__))
       "Unhandled INT_TO_FP type in custom expander!")(static_cast <bool> (Src.getValueType() == MVT::i32 &&
 "Unhandled INT_TO_FP type in custom expander!") ? void (0) :
 __assert_fail ("Src.getValueType() == MVT::i32 && \"Unhandled INT_TO_FP type in custom expander!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8730, __extension__
 __PRETTY_FUNCTION__));
// Since we only generate this in 64-bit mode, we can take advantage of
// 64-bit registers.  In particular, sign extend the input value into the
// 64-bit register with extsw, store the WHOLE 64-bit value into the stack
// then lfd it and fcfid it.
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo &MFI = MF.getFrameInfo();
EVT PtrVT = getPointerTy(MF.getDataLayout());

SDValue Ld;
if (Subtarget.hasLFIWAX() || Subtarget.hasFPCVT()) {
  ReuseLoadInfo RLI;
  bool ReusingLoad;
  if (!(ReusingLoad = canReuseLoadAddress(Src, MVT::i32, RLI, DAG))) {
    int FrameIdx = MFI.CreateStackObject(4, Align(4), false);
    SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);

    SDValue Store = DAG.getStore(Chain, dl, Src, FIdx,
                                 MachinePointerInfo::getFixedStack(
                                     DAG.getMachineFunction(), FrameIdx));
    Chain = Store;

    assert(cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 &&(static_cast <bool> (cast<StoreSDNode>(Store)->
getMemoryVT() == MVT::i32 && "Expected an i32 store")
 ? void (0) : __assert_fail ("cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 && \"Expected an i32 store\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8753, __extension__
 __PRETTY_FUNCTION__))
           "Expected an i32 store")(static_cast <bool> (cast<StoreSDNode>(Store)->
getMemoryVT() == MVT::i32 && "Expected an i32 store")
 ? void (0) : __assert_fail ("cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 && \"Expected an i32 store\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8753, __extension__
 __PRETTY_FUNCTION__));

    RLI.Ptr = FIdx;
    RLI.Chain = Chain;
    RLI.MPI =
        MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx);
    RLI.Alignment = Align(4);
  }

  MachineMemOperand *MMO =
    MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
                            RLI.Alignment, RLI.AAInfo, RLI.Ranges);
  SDValue Ops[] = { RLI.Chain, RLI.Ptr };
  Ld = DAG.getMemIntrinsicNode(IsSigned ? PPCISD::LFIWAX : PPCISD::LFIWZX, dl,
                               DAG.getVTList(MVT::f64, MVT::Other), Ops,
                               MVT::i32, MMO);
  Chain = Ld.getValue(1);
  if (ReusingLoad)
    spliceIntoChain(RLI.ResChain, Ld.getValue(1), DAG);
} else {
  assert(Subtarget.isPPC64() &&(static_cast <bool> (Subtarget.isPPC64() && "i32->FP without LFIWAX supported only on PPC64"
) ? void (0) : __assert_fail ("Subtarget.isPPC64() && \"i32->FP without LFIWAX supported only on PPC64\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8774, __extension__
 __PRETTY_FUNCTION__))
         "i32->FP without LFIWAX supported only on PPC64")(static_cast <bool> (Subtarget.isPPC64() && "i32->FP without LFIWAX supported only on PPC64"
) ? void (0) : __assert_fail ("Subtarget.isPPC64() && \"i32->FP without LFIWAX supported only on PPC64\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8774, __extension__
 __PRETTY_FUNCTION__));

  int FrameIdx = MFI.CreateStackObject(8, Align(8), false);
  SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);

  SDValue Ext64 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i64, Src);

  // STD the extended value into the stack slot.
  SDValue Store = DAG.getStore(
      Chain, dl, Ext64, FIdx,
      MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx));
  Chain = Store;

  // Load the value as a double.
  Ld = DAG.getLoad(
      MVT::f64, dl, Chain, FIdx,
      MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx));
  Chain = Ld.getValue(1);
}

// FCFID it and return it.
SDValue FP = convertIntToFP(Op, Ld, DAG, Subtarget, Chain);
if (IsStrict)
  Chain = FP.getValue(1);
if (Op.getValueType() == MVT::f32 && !Subtarget.hasFPCVT()) {
  if (IsStrict)
    FP = DAG.getNode(ISD::STRICT_FP_ROUND, dl,
                     DAG.getVTList(MVT::f32, MVT::Other),
                     {Chain, FP, DAG.getIntPtrConstant(0, dl)}, Flags);
  else
    FP = DAG.getNode(ISD::FP_ROUND, dl, MVT::f32, FP,
                     DAG.getIntPtrConstant(0, dl, /*isTarget=*/true));
}
return FP;
8808}

8810SDValue PPCTargetLowering::LowerGET_ROUNDING(SDValue Op,
                                           SelectionDAG &DAG) const {
SDLoc dl(Op);
/*
 The rounding mode is in bits 30:31 of FPSR, and has the following
 settings:
   00 Round to nearest
   01 Round to 0
   10 Round to +inf
   11 Round to -inf

GET_ROUNDING, on the other hand, expects the following:
  -1 Undefined
   0 Round to 0
   1 Round to nearest
   2 Round to +inf
   3 Round to -inf

To perform the conversion, we do:
  ((FPSCR & 0x3) ^ ((~FPSCR & 0x3) >> 1))
*/

MachineFunction &MF = DAG.getMachineFunction();
EVT VT = Op.getValueType();
EVT PtrVT = getPointerTy(MF.getDataLayout());

// Save FP Control Word to register
SDValue Chain = Op.getOperand(0);
SDValue MFFS = DAG.getNode(PPCISD::MFFS, dl, {MVT::f64, MVT::Other}, Chain);
Chain = MFFS.getValue(1);

SDValue CWD;
if (isTypeLegal(MVT::i64)) {
  CWD = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32,
                    DAG.getNode(ISD::BITCAST, dl, MVT::i64, MFFS));
} else {
  // Save FP register to stack slot
  int SSFI = MF.getFrameInfo().CreateStackObject(8, Align(8), false);
  SDValue StackSlot = DAG.getFrameIndex(SSFI, PtrVT);
  Chain = DAG.getStore(Chain, dl, MFFS, StackSlot, MachinePointerInfo());

  // Load FP Control Word from low 32 bits of stack slot.
  assert(hasBigEndianPartOrdering(MVT::i64, MF.getDataLayout()) &&(static_cast <bool> (hasBigEndianPartOrdering(MVT::i64,
 MF.getDataLayout()) && "Stack slot adjustment is valid only on big endian subtargets!"
) ? void (0) : __assert_fail ("hasBigEndianPartOrdering(MVT::i64, MF.getDataLayout()) && \"Stack slot adjustment is valid only on big endian subtargets!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8853, __extension__
 __PRETTY_FUNCTION__))
         "Stack slot adjustment is valid only on big endian subtargets!")(static_cast <bool> (hasBigEndianPartOrdering(MVT::i64,
 MF.getDataLayout()) && "Stack slot adjustment is valid only on big endian subtargets!"
) ? void (0) : __assert_fail ("hasBigEndianPartOrdering(MVT::i64, MF.getDataLayout()) && \"Stack slot adjustment is valid only on big endian subtargets!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8853, __extension__
 __PRETTY_FUNCTION__));
  SDValue Four = DAG.getConstant(4, dl, PtrVT);
  SDValue Addr = DAG.getNode(ISD::ADD, dl, PtrVT, StackSlot, Four);
  CWD = DAG.getLoad(MVT::i32, dl, Chain, Addr, MachinePointerInfo());
  Chain = CWD.getValue(1);
}

// Transform as necessary
SDValue CWD1 =
  DAG.getNode(ISD::AND, dl, MVT::i32,
              CWD, DAG.getConstant(3, dl, MVT::i32));
SDValue CWD2 =
  DAG.getNode(ISD::SRL, dl, MVT::i32,
              DAG.getNode(ISD::AND, dl, MVT::i32,
                          DAG.getNode(ISD::XOR, dl, MVT::i32,
                                      CWD, DAG.getConstant(3, dl, MVT::i32)),
                          DAG.getConstant(3, dl, MVT::i32)),
              DAG.getConstant(1, dl, MVT::i32));

SDValue RetVal =
  DAG.getNode(ISD::XOR, dl, MVT::i32, CWD1, CWD2);

RetVal =
    DAG.getNode((VT.getSizeInBits() < 16 ? ISD::TRUNCATE : ISD::ZERO_EXTEND),
                dl, VT, RetVal);

return DAG.getMergeValues({RetVal, Chain}, dl);
8880}

8882SDValue PPCTargetLowering::LowerSHL_PARTS(SDValue Op, SelectionDAG &DAG) const {
EVT VT = Op.getValueType();
unsigned BitWidth = VT.getSizeInBits();
SDLoc dl(Op);
assert(Op.getNumOperands() == 3 &&(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SHL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SHL!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8888, __extension__
 __PRETTY_FUNCTION__))
       VT == Op.getOperand(1).getValueType() &&(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SHL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SHL!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8888, __extension__
 __PRETTY_FUNCTION__))
       "Unexpected SHL!")(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SHL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SHL!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8888, __extension__
 __PRETTY_FUNCTION__));

// Expand into a bunch of logical ops.  Note that these ops
// depend on the PPC behavior for oversized shift amounts.
SDValue Lo = Op.getOperand(0);
SDValue Hi = Op.getOperand(1);
SDValue Amt = Op.getOperand(2);
EVT AmtVT = Amt.getValueType();

SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
                           DAG.getConstant(BitWidth, dl, AmtVT), Amt);
SDValue Tmp2 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Amt);
SDValue Tmp3 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Tmp1);
SDValue Tmp4 = DAG.getNode(ISD::OR , dl, VT, Tmp2, Tmp3);
SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
                           DAG.getConstant(-BitWidth, dl, AmtVT));
SDValue Tmp6 = DAG.getNode(PPCISD::SHL, dl, VT, Lo, Tmp5);
SDValue OutHi = DAG.getNode(ISD::OR, dl, VT, Tmp4, Tmp6);
SDValue OutLo = DAG.getNode(PPCISD::SHL, dl, VT, Lo, Amt);
SDValue OutOps[] = { OutLo, OutHi };
return DAG.getMergeValues(OutOps, dl);
8909}

8911SDValue PPCTargetLowering::LowerSRL_PARTS(SDValue Op, SelectionDAG &DAG) const {
EVT VT = Op.getValueType();
SDLoc dl(Op);
unsigned BitWidth = VT.getSizeInBits();
assert(Op.getNumOperands() == 3 &&(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SRL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRL!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8917, __extension__
 __PRETTY_FUNCTION__))
       VT == Op.getOperand(1).getValueType() &&(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SRL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRL!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8917, __extension__
 __PRETTY_FUNCTION__))
       "Unexpected SRL!")(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SRL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRL!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8917, __extension__
 __PRETTY_FUNCTION__));

// Expand into a bunch of logical ops.  Note that these ops
// depend on the PPC behavior for oversized shift amounts.
SDValue Lo = Op.getOperand(0);
SDValue Hi = Op.getOperand(1);
SDValue Amt = Op.getOperand(2);
EVT AmtVT = Amt.getValueType();

SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
                           DAG.getConstant(BitWidth, dl, AmtVT), Amt);
SDValue Tmp2 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Amt);
SDValue Tmp3 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Tmp1);
SDValue Tmp4 = DAG.getNode(ISD::OR, dl, VT, Tmp2, Tmp3);
SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
                           DAG.getConstant(-BitWidth, dl, AmtVT));
SDValue Tmp6 = DAG.getNode(PPCISD::SRL, dl, VT, Hi, Tmp5);
SDValue OutLo = DAG.getNode(ISD::OR, dl, VT, Tmp4, Tmp6);
SDValue OutHi = DAG.getNode(PPCISD::SRL, dl, VT, Hi, Amt);
SDValue OutOps[] = { OutLo, OutHi };
return DAG.getMergeValues(OutOps, dl);
8938}

8940SDValue PPCTargetLowering::LowerSRA_PARTS(SDValue Op, SelectionDAG &DAG) const {
SDLoc dl(Op);
EVT VT = Op.getValueType();
unsigned BitWidth = VT.getSizeInBits();
assert(Op.getNumOperands() == 3 &&(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SRA!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRA!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8946, __extension__
 __PRETTY_FUNCTION__))
       VT == Op.getOperand(1).getValueType() &&(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SRA!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRA!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8946, __extension__
 __PRETTY_FUNCTION__))
       "Unexpected SRA!")(static_cast <bool> (Op.getNumOperands() == 3 &&
 VT == Op.getOperand(1).getValueType() && "Unexpected SRA!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRA!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 8946, __extension__
 __PRETTY_FUNCTION__));

// Expand into a bunch of logical ops, followed by a select_cc.
SDValue Lo = Op.getOperand(0);
SDValue Hi = Op.getOperand(1);
SDValue Amt = Op.getOperand(2);
EVT AmtVT = Amt.getValueType();

SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
                           DAG.getConstant(BitWidth, dl, AmtVT), Amt);
SDValue Tmp2 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Amt);
SDValue Tmp3 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Tmp1);
SDValue Tmp4 = DAG.getNode(ISD::OR, dl, VT, Tmp2, Tmp3);
SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
                           DAG.getConstant(-BitWidth, dl, AmtVT));
SDValue Tmp6 = DAG.getNode(PPCISD::SRA, dl, VT, Hi, Tmp5);
SDValue OutHi = DAG.getNode(PPCISD::SRA, dl, VT, Hi, Amt);
SDValue OutLo = DAG.getSelectCC(dl, Tmp5, DAG.getConstant(0, dl, AmtVT),
                                Tmp4, Tmp6, ISD::SETLE);
SDValue OutOps[] = { OutLo, OutHi };
return DAG.getMergeValues(OutOps, dl);
8967}

8969SDValue PPCTargetLowering::LowerFunnelShift(SDValue Op,
                                          SelectionDAG &DAG) const {
SDLoc dl(Op);
EVT VT = Op.getValueType();
unsigned BitWidth = VT.getSizeInBits();

bool IsFSHL = Op.getOpcode() == ISD::FSHL;
SDValue X = Op.getOperand(0);
SDValue Y = Op.getOperand(1);
SDValue Z = Op.getOperand(2);
EVT AmtVT = Z.getValueType();

// fshl: (X << (Z % BW)) | (Y >> (BW - (Z % BW)))
// fshr: (X << (BW - (Z % BW))) | (Y >> (Z % BW))
// This is simpler than TargetLowering::expandFunnelShift because we can rely
// on PowerPC shift by BW being well defined.
Z = DAG.getNode(ISD::AND, dl, AmtVT, Z,
                DAG.getConstant(BitWidth - 1, dl, AmtVT));
SDValue SubZ =
    DAG.getNode(ISD::SUB, dl, AmtVT, DAG.getConstant(BitWidth, dl, AmtVT), Z);
X = DAG.getNode(PPCISD::SHL, dl, VT, X, IsFSHL ? Z : SubZ);
Y = DAG.getNode(PPCISD::SRL, dl, VT, Y, IsFSHL ? SubZ : Z);
return DAG.getNode(ISD::OR, dl, VT, X, Y);
8992}

8994//===----------------------------------------------------------------------===//
8995// Vector related lowering.
8996//

8998/// getCanonicalConstSplat - Build a canonical splat immediate of Val with an
8999/// element size of SplatSize. Cast the result to VT.
9000static SDValue getCanonicalConstSplat(uint64_t Val, unsigned SplatSize, EVT VT,
                                    SelectionDAG &DAG, const SDLoc &dl) {
static const MVT VTys[] = { // canonical VT to use for each size.
  MVT::v16i8, MVT::v8i16, MVT::Other, MVT::v4i32
};

EVT ReqVT = VT != MVT::Other ? VT : VTys[SplatSize-1];

// For a splat with all ones, turn it to vspltisb 0xFF to canonicalize.
if (Val == ((1LLU << (SplatSize * 8)) - 1)) {
  SplatSize = 1;
  Val = 0xFF;
}

EVT CanonicalVT = VTys[SplatSize-1];

// Build a canonical splat for this value.
return DAG.getBitcast(ReqVT, DAG.getConstant(Val, dl, CanonicalVT));
9018}

9020/// BuildIntrinsicOp - Return a unary operator intrinsic node with the
9021/// specified intrinsic ID.
9022static SDValue BuildIntrinsicOp(unsigned IID, SDValue Op, SelectionDAG &DAG,
                              const SDLoc &dl, EVT DestVT = MVT::Other) {
if (DestVT == MVT::Other) DestVT = Op.getValueType();
return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
                   DAG.getConstant(IID, dl, MVT::i32), Op);
9027}

9029/// BuildIntrinsicOp - Return a binary operator intrinsic node with the
9030/// specified intrinsic ID.
9031static SDValue BuildIntrinsicOp(unsigned IID, SDValue LHS, SDValue RHS,
                              SelectionDAG &DAG, const SDLoc &dl,
                              EVT DestVT = MVT::Other) {
if (DestVT == MVT::Other) DestVT = LHS.getValueType();
return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
                   DAG.getConstant(IID, dl, MVT::i32), LHS, RHS);
9037}

9039/// BuildIntrinsicOp - Return a ternary operator intrinsic node with the
9040/// specified intrinsic ID.
9041static SDValue BuildIntrinsicOp(unsigned IID, SDValue Op0, SDValue Op1,
                              SDValue Op2, SelectionDAG &DAG, const SDLoc &dl,
                              EVT DestVT = MVT::Other) {
if (DestVT == MVT::Other) DestVT = Op0.getValueType();
return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
                   DAG.getConstant(IID, dl, MVT::i32), Op0, Op1, Op2);
9047}

9049/// BuildVSLDOI - Return a VECTOR_SHUFFLE that is a vsldoi of the specified
9050/// amount.  The result has the specified value type.
9051static SDValue BuildVSLDOI(SDValue LHS, SDValue RHS, unsigned Amt, EVT VT,
                         SelectionDAG &DAG, const SDLoc &dl) {
// Force LHS/RHS to be the right type.
LHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, LHS);
RHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, RHS);

int Ops[16];
for (unsigned i = 0; i != 16; ++i)
  Ops[i] = i + Amt;
SDValue T = DAG.getVectorShuffle(MVT::v16i8, dl, LHS, RHS, Ops);
return DAG.getNode(ISD::BITCAST, dl, VT, T);
9062}

9064/// Do we have an efficient pattern in a .td file for this node?
9065///
9066/// \param V - pointer to the BuildVectorSDNode being matched
9067/// \param HasDirectMove - does this subtarget have VSR <-> GPR direct moves?
9068///
9069/// There are some patterns where it is beneficial to keep a BUILD_VECTOR
9070/// node as a BUILD_VECTOR node rather than expanding it. The patterns where
9071/// the opposite is true (expansion is beneficial) are:
9072/// - The node builds a vector out of integers that are not 32 or 64-bits
9073/// - The node builds a vector out of constants
9074/// - The node is a "load-and-splat"
9075/// In all other cases, we will choose to keep the BUILD_VECTOR.
9076static bool haveEfficientBuildVectorPattern(BuildVectorSDNode *V,
                                          bool HasDirectMove,
                                          bool HasP8Vector) {
EVT VecVT = V->getValueType(0);
bool RightType = VecVT == MVT::v2f64 ||
  (HasP8Vector && VecVT == MVT::v4f32) ||
  (HasDirectMove && (VecVT == MVT::v2i64 || VecVT == MVT::v4i32));
if (!RightType)
  return false;

bool IsSplat = true;
bool IsLoad = false;
SDValue Op0 = V->getOperand(0);

// This function is called in a block that confirms the node is not a constant
// splat. So a constant BUILD_VECTOR here means the vector is built out of
// different constants.
if (V->isConstant())
  return false;
for (int i = 0, e = V->getNumOperands(); i < e; ++i) {
  if (V->getOperand(i).isUndef())
    return false;
  // We want to expand nodes that represent load-and-splat even if the
  // loaded value is a floating point truncation or conversion to int.
  if (V->getOperand(i).getOpcode() == ISD::LOAD ||
      (V->getOperand(i).getOpcode() == ISD::FP_ROUND &&
       V->getOperand(i).getOperand(0).getOpcode() == ISD::LOAD) ||
      (V->getOperand(i).getOpcode() == ISD::FP_TO_SINT &&
       V->getOperand(i).getOperand(0).getOpcode() == ISD::LOAD) ||
      (V->getOperand(i).getOpcode() == ISD::FP_TO_UINT &&
       V->getOperand(i).getOperand(0).getOpcode() == ISD::LOAD))
    IsLoad = true;
  // If the operands are different or the input is not a load and has more
  // uses than just this BV node, then it isn't a splat.
  if (V->getOperand(i) != Op0 ||
      (!IsLoad && !V->isOnlyUserOf(V->getOperand(i).getNode())))
    IsSplat = false;
}
return !(IsSplat && IsLoad);
9115}

9117// Lower BITCAST(f128, (build_pair i64, i64)) to BUILD_FP128.
9118SDValue PPCTargetLowering::LowerBITCAST(SDValue Op, SelectionDAG &DAG) const {

SDLoc dl(Op);
SDValue Op0 = Op->getOperand(0);

if ((Op.getValueType() != MVT::f128) ||
    (Op0.getOpcode() != ISD::BUILD_PAIR) ||
    (Op0.getOperand(0).getValueType() != MVT::i64) ||
    (Op0.getOperand(1).getValueType() != MVT::i64))
  return SDValue();

return DAG.getNode(PPCISD::BUILD_FP128, dl, MVT::f128, Op0.getOperand(0),
                   Op0.getOperand(1));
9131}

9133static const SDValue *getNormalLoadInput(const SDValue &Op, bool &IsPermuted) {
const SDValue *InputLoad = &Op;
while (InputLoad->getOpcode() == ISD::BITCAST)
  InputLoad = &InputLoad->getOperand(0);
if (InputLoad->getOpcode() == ISD::SCALAR_TO_VECTOR ||
4
←
Taking false branch→
    InputLoad->getOpcode() == PPCISD::SCALAR_TO_VECTOR_PERMUTED) {
  IsPermuted = InputLoad->getOpcode() == PPCISD::SCALAR_TO_VECTOR_PERMUTED;
  InputLoad = &InputLoad->getOperand(0);
}
if (InputLoad->getOpcode() != ISD::LOAD)
5
←
Taking true branch→
  return nullptr;
6
←
Returning null pointer, which participates in a condition later→
LoadSDNode *LD = cast<LoadSDNode>(*InputLoad);
return ISD::isNormalLoad(LD) ? InputLoad : nullptr;
9146}

9148// Convert the argument APFloat to a single precision APFloat if there is no
9149// loss in information during the conversion to single precision APFloat and the
9150// resulting number is not a denormal number. Return true if successful.
9151bool llvm::convertToNonDenormSingle(APFloat &ArgAPFloat) {
APFloat APFloatToConvert = ArgAPFloat;
bool LosesInfo = true;
APFloatToConvert.convert(APFloat::IEEEsingle(), APFloat::rmNearestTiesToEven,
                         &LosesInfo);
bool Success = (!LosesInfo && !APFloatToConvert.isDenormal());
if (Success)
  ArgAPFloat = APFloatToConvert;
return Success;
9160}

9162// Bitcast the argument APInt to a double and convert it to a single precision
9163// APFloat, bitcast the APFloat to an APInt and assign it to the original
9164// argument if there is no loss in information during the conversion from
9165// double to single precision APFloat and the resulting number is not a denormal
9166// number. Return true if successful.
9167bool llvm::convertToNonDenormSingle(APInt &ArgAPInt) {
double DpValue = ArgAPInt.bitsToDouble();
APFloat APFloatDp(DpValue);
bool Success = convertToNonDenormSingle(APFloatDp);
if (Success)
  ArgAPInt = APFloatDp.bitcastToAPInt();
return Success;
9174}

9176// Nondestructive check for convertTonNonDenormSingle.
9177bool llvm::checkConvertToNonDenormSingle(APFloat &ArgAPFloat) {
// Only convert if it loses info, since XXSPLTIDP should
// handle the other case.
APFloat APFloatToConvert = ArgAPFloat;
bool LosesInfo = true;
APFloatToConvert.convert(APFloat::IEEEsingle(), APFloat::rmNearestTiesToEven,
                         &LosesInfo);

return (!LosesInfo && !APFloatToConvert.isDenormal());
9186}

9188static bool isValidSplatLoad(const PPCSubtarget &Subtarget, const SDValue &Op,
                           unsigned &Opcode) {
LoadSDNode *InputNode = dyn_cast<LoadSDNode>(Op.getOperand(0));
if (!InputNode || !Subtarget.hasVSX() || !ISD::isUNINDEXEDLoad(InputNode))
  return false;

EVT Ty = Op->getValueType(0);
// For v2f64, v4f32 and v4i32 types, we require the load to be non-extending
// as we cannot handle extending loads for these types.
if ((Ty == MVT::v2f64 || Ty == MVT::v4f32 || Ty == MVT::v4i32) &&
    ISD::isNON_EXTLoad(InputNode))
  return true;

EVT MemVT = InputNode->getMemoryVT();
// For v8i16 and v16i8 types, extending loads can be handled as long as the
// memory VT is the same vector element VT type.
// The loads feeding into the v8i16 and v16i8 types will be extending because
// scalar i8/i16 are not legal types.
if ((Ty == MVT::v8i16 || Ty == MVT::v16i8) && ISD::isEXTLoad(InputNode) &&
    (MemVT == Ty.getVectorElementType()))
  return true;

if (Ty == MVT::v2i64) {
  // Check the extend type, when the input type is i32, and the output vector
  // type is v2i64.
  if (MemVT == MVT::i32) {
    if (ISD::isZEXTLoad(InputNode))
      Opcode = PPCISD::ZEXT_LD_SPLAT;
    if (ISD::isSEXTLoad(InputNode))
      Opcode = PPCISD::SEXT_LD_SPLAT;
  }
  return true;
}
return false;
9222}

9224// If this is a case we can't handle, return null and let the default
9225// expansion code take care of it.  If we CAN select this case, and if it
9226// selects to a single instruction, return Op.  Otherwise, if we can codegen
9227// this case more efficiently than a constant pool load, lower it to the
9228// sequence of ops that should be used.
9229SDValue PPCTargetLowering::LowerBUILD_VECTOR(SDValue Op,
                                           SelectionDAG &DAG) const {
SDLoc dl(Op);
BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
assert(BVN && "Expected a BuildVectorSDNode in LowerBUILD_VECTOR")(static_cast <bool> (BVN && "Expected a BuildVectorSDNode in LowerBUILD_VECTOR"
) ? void (0) : __assert_fail ("BVN && \"Expected a BuildVectorSDNode in LowerBUILD_VECTOR\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9233, __extension__
 __PRETTY_FUNCTION__));

// Check if this is a splat of a constant value.
APInt APSplatBits, APSplatUndef;
unsigned SplatBitSize;
bool HasAnyUndefs;
bool BVNIsConstantSplat =
    BVN->isConstantSplat(APSplatBits, APSplatUndef, SplatBitSize,
                         HasAnyUndefs, 0, !Subtarget.isLittleEndian());

// If it is a splat of a double, check if we can shrink it to a 32 bit
// non-denormal float which when converted back to double gives us the same
// double. This is to exploit the XXSPLTIDP instruction.
// If we lose precision, we use XXSPLTI32DX.
if (BVNIsConstantSplat && (SplatBitSize == 64) &&
    Subtarget.hasPrefixInstrs()) {
  // Check the type first to short-circuit so we don't modify APSplatBits if
  // this block isn't executed.
  if ((Op->getValueType(0) == MVT::v2f64) &&
      convertToNonDenormSingle(APSplatBits)) {
    SDValue SplatNode = DAG.getNode(
        PPCISD::XXSPLTI_SP_TO_DP, dl, MVT::v2f64,
        DAG.getTargetConstant(APSplatBits.getZExtValue(), dl, MVT::i32));
    return DAG.getBitcast(Op.getValueType(), SplatNode);
  } else {
    // We may lose precision, so we have to use XXSPLTI32DX.

    uint32_t Hi =
        (uint32_t)((APSplatBits.getZExtValue() & 0xFFFFFFFF00000000LL) >> 32);
    uint32_t Lo =
        (uint32_t)(APSplatBits.getZExtValue() & 0xFFFFFFFF);
    SDValue SplatNode = DAG.getUNDEF(MVT::v2i64);

    if (!Hi || !Lo)
      // If either load is 0, then we should generate XXLXOR to set to 0.
      SplatNode = DAG.getTargetConstant(0, dl, MVT::v2i64);

    if (Hi)
      SplatNode = DAG.getNode(
          PPCISD::XXSPLTI32DX, dl, MVT::v2i64, SplatNode,
          DAG.getTargetConstant(0, dl, MVT::i32),
          DAG.getTargetConstant(Hi, dl, MVT::i32));

    if (Lo)
      SplatNode =
          DAG.getNode(PPCISD::XXSPLTI32DX, dl, MVT::v2i64, SplatNode,
                      DAG.getTargetConstant(1, dl, MVT::i32),
                      DAG.getTargetConstant(Lo, dl, MVT::i32));

    return DAG.getBitcast(Op.getValueType(), SplatNode);
  }
}

if (!BVNIsConstantSplat || SplatBitSize > 32) {
  unsigned NewOpcode = PPCISD::LD_SPLAT;

  // Handle load-and-splat patterns as we have instructions that will do this
  // in one go.
  if (DAG.isSplatValue(Op, true) &&
      isValidSplatLoad(Subtarget, Op, NewOpcode)) {
    const SDValue *InputLoad = &Op.getOperand(0);
    LoadSDNode *LD = cast<LoadSDNode>(*InputLoad);

    // If the input load is an extending load, it will be an i32 -> i64
    // extending load and isValidSplatLoad() will update NewOpcode.
    unsigned MemorySize = LD->getMemoryVT().getScalarSizeInBits();
    unsigned ElementSize =
        MemorySize * ((NewOpcode == PPCISD::LD_SPLAT) ? 1 : 2);

    assert(((ElementSize == 2 * MemorySize)(static_cast <bool> (((ElementSize == 2 * MemorySize) ?
 (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::
SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && "Unmatched element size and opcode!\n"
) ? void (0) : __assert_fail ("((ElementSize == 2 * MemorySize) ? (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && \"Unmatched element size and opcode!\\n\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9306, __extension__
 __PRETTY_FUNCTION__))
                ? (NewOpcode == PPCISD::ZEXT_LD_SPLAT ||(static_cast <bool> (((ElementSize == 2 * MemorySize) ?
 (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::
SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && "Unmatched element size and opcode!\n"
) ? void (0) : __assert_fail ("((ElementSize == 2 * MemorySize) ? (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && \"Unmatched element size and opcode!\\n\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9306, __extension__
 __PRETTY_FUNCTION__))
                   NewOpcode == PPCISD::SEXT_LD_SPLAT)(static_cast <bool> (((ElementSize == 2 * MemorySize) ?
 (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::
SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && "Unmatched element size and opcode!\n"
) ? void (0) : __assert_fail ("((ElementSize == 2 * MemorySize) ? (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && \"Unmatched element size and opcode!\\n\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9306, __extension__
 __PRETTY_FUNCTION__))
                : (NewOpcode == PPCISD::LD_SPLAT)) &&(static_cast <bool> (((ElementSize == 2 * MemorySize) ?
 (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::
SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && "Unmatched element size and opcode!\n"
) ? void (0) : __assert_fail ("((ElementSize == 2 * MemorySize) ? (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && \"Unmatched element size and opcode!\\n\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9306, __extension__
 __PRETTY_FUNCTION__))
           "Unmatched element size and opcode!\n")(static_cast <bool> (((ElementSize == 2 * MemorySize) ?
 (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::
SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && "Unmatched element size and opcode!\n"
) ? void (0) : __assert_fail ("((ElementSize == 2 * MemorySize) ? (NewOpcode == PPCISD::ZEXT_LD_SPLAT || NewOpcode == PPCISD::SEXT_LD_SPLAT) : (NewOpcode == PPCISD::LD_SPLAT)) && \"Unmatched element size and opcode!\\n\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9306, __extension__
 __PRETTY_FUNCTION__));

    // Checking for a single use of this load, we have to check for vector
    // width (128 bits) / ElementSize uses (since each operand of the
    // BUILD_VECTOR is a separate use of the value.
    unsigned NumUsesOfInputLD = 128 / ElementSize;
    for (SDValue BVInOp : Op->ops())
      if (BVInOp.isUndef())
        NumUsesOfInputLD--;

    // Exclude somes case where LD_SPLAT is worse than scalar_to_vector:
    // Below cases should also happen for "lfiwzx/lfiwax + LE target + index
    // 1" and "lxvrhx + BE target + index 7" and "lxvrbx + BE target + index
    // 15", but function IsValidSplatLoad() now will only return true when
    // the data at index 0 is not nullptr. So we will not get into trouble for
    // these cases.
    //
    // case 1 - lfiwzx/lfiwax
    // 1.1: load result is i32 and is sign/zero extend to i64;
    // 1.2: build a v2i64 vector type with above loaded value;
    // 1.3: the vector has only one value at index 0, others are all undef;
    // 1.4: on BE target, so that lfiwzx/lfiwax does not need any permute.
    if (NumUsesOfInputLD == 1 &&
        (Op->getValueType(0) == MVT::v2i64 && NewOpcode != PPCISD::LD_SPLAT &&
         !Subtarget.isLittleEndian() && Subtarget.hasVSX() &&
         Subtarget.hasLFIWAX()))
      return SDValue();

    // case 2 - lxvr[hb]x
    // 2.1: load result is at most i16;
    // 2.2: build a vector with above loaded value;
    // 2.3: the vector has only one value at index 0, others are all undef;
    // 2.4: on LE target, so that lxvr[hb]x does not need any permute.
    if (NumUsesOfInputLD == 1 && Subtarget.isLittleEndian() &&
        Subtarget.isISA3_1() && ElementSize <= 16)
      return SDValue();

    assert(NumUsesOfInputLD > 0 && "No uses of input LD of a build_vector?")(static_cast <bool> (NumUsesOfInputLD > 0 &&
 "No uses of input LD of a build_vector?") ? void (0) : __assert_fail
 ("NumUsesOfInputLD > 0 && \"No uses of input LD of a build_vector?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9343, __extension__
 __PRETTY_FUNCTION__));
    if (InputLoad->getNode()->hasNUsesOfValue(NumUsesOfInputLD, 0) &&
        Subtarget.hasVSX()) {
      SDValue Ops[] = {
        LD->getChain(),    // Chain
        LD->getBasePtr(),  // Ptr
        DAG.getValueType(Op.getValueType()) // VT
      };
      SDValue LdSplt = DAG.getMemIntrinsicNode(
          NewOpcode, dl, DAG.getVTList(Op.getValueType(), MVT::Other), Ops,
          LD->getMemoryVT(), LD->getMemOperand());
      // Replace all uses of the output chain of the original load with the
      // output chain of the new load.
      DAG.ReplaceAllUsesOfValueWith(InputLoad->getValue(1),
                                    LdSplt.getValue(1));
      return LdSplt;
    }
  }

  // In 64BIT mode BUILD_VECTOR nodes that are not constant splats of up to
  // 32-bits can be lowered to VSX instructions under certain conditions.
  // Without VSX, there is no pattern more efficient than expanding the node.
  if (Subtarget.hasVSX() && Subtarget.isPPC64() &&
      haveEfficientBuildVectorPattern(BVN, Subtarget.hasDirectMove(),
                                      Subtarget.hasP8Vector()))
    return Op;
  return SDValue();
}

uint64_t SplatBits = APSplatBits.getZExtValue();
uint64_t SplatUndef = APSplatUndef.getZExtValue();
unsigned SplatSize = SplatBitSize / 8;

// First, handle single instruction cases.

// All zeros?
if (SplatBits == 0) {
  // Canonicalize all zero vectors to be v4i32.
  if (Op.getValueType() != MVT::v4i32 || HasAnyUndefs) {
    SDValue Z = DAG.getConstant(0, dl, MVT::v4i32);
    Op = DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Z);
  }
  return Op;
}

// We have XXSPLTIW for constant splats four bytes wide.
// Given vector length is a multiple of 4, 2-byte splats can be replaced
// with 4-byte splats. We replicate the SplatBits in case of 2-byte splat to
// make a 4-byte splat element. For example: 2-byte splat of 0xABAB can be
// turned into a 4-byte splat of 0xABABABAB.
if (Subtarget.hasPrefixInstrs() && SplatSize == 2)
  return getCanonicalConstSplat(SplatBits | (SplatBits << 16), SplatSize * 2,
                                Op.getValueType(), DAG, dl);

if (Subtarget.hasPrefixInstrs() && SplatSize == 4)
  return getCanonicalConstSplat(SplatBits, SplatSize, Op.getValueType(), DAG,
                                dl);

// We have XXSPLTIB for constant splats one byte wide.
if (Subtarget.hasP9Vector() && SplatSize == 1)
  return getCanonicalConstSplat(SplatBits, SplatSize, Op.getValueType(), DAG,
                                dl);

// If the sign extended value is in the range [-16,15], use VSPLTI[bhw].
int32_t SextVal= (int32_t(SplatBits << (32-SplatBitSize)) >>
                  (32-SplatBitSize));
if (SextVal >= -16 && SextVal <= 15)
  return getCanonicalConstSplat(SextVal, SplatSize, Op.getValueType(), DAG,
                                dl);

// Two instruction sequences.

// If this value is in the range [-32,30] and is even, use:
//     VSPLTI[bhw](val/2) + VSPLTI[bhw](val/2)
// If this value is in the range [17,31] and is odd, use:
//     VSPLTI[bhw](val-16) - VSPLTI[bhw](-16)
// If this value is in the range [-31,-17] and is odd, use:
//     VSPLTI[bhw](val+16) + VSPLTI[bhw](-16)
// Note the last two are three-instruction sequences.
if (SextVal >= -32 && SextVal <= 31) {
  // To avoid having these optimizations undone by constant folding,
  // we convert to a pseudo that will be expanded later into one of
  // the above forms.
  SDValue Elt = DAG.getConstant(SextVal, dl, MVT::i32);
  EVT VT = (SplatSize == 1 ? MVT::v16i8 :
            (SplatSize == 2 ? MVT::v8i16 : MVT::v4i32));
  SDValue EltSize = DAG.getConstant(SplatSize, dl, MVT::i32);
  SDValue RetVal = DAG.getNode(PPCISD::VADD_SPLAT, dl, VT, Elt, EltSize);
  if (VT == Op.getValueType())
    return RetVal;
  else
    return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), RetVal);
}

// If this is 0x8000_0000 x 4, turn into vspltisw + vslw.  If it is
// 0x7FFF_FFFF x 4, turn it into not(0x8000_0000).  This is important
// for fneg/fabs.
if (SplatSize == 4 && SplatBits == (0x7FFFFFFF&~SplatUndef)) {
  // Make -1 and vspltisw -1:
  SDValue OnesV = getCanonicalConstSplat(-1, 4, MVT::v4i32, DAG, dl);

  // Make the VSLW intrinsic, computing 0x8000_0000.
  SDValue Res = BuildIntrinsicOp(Intrinsic::ppc_altivec_vslw, OnesV,
                                 OnesV, DAG, dl);

  // xor by OnesV to invert it.
  Res = DAG.getNode(ISD::XOR, dl, MVT::v4i32, Res, OnesV);
  return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
}

// Check to see if this is a wide variety of vsplti*, binop self cases.
static const signed char SplatCsts[] = {
  -1, 1, -2, 2, -3, 3, -4, 4, -5, 5, -6, 6, -7, 7,
  -8, 8, -9, 9, -10, 10, -11, 11, -12, 12, -13, 13, 14, -14, 15, -15, -16
};

for (unsigned idx = 0; idx < std::size(SplatCsts); ++idx) {
  // Indirect through the SplatCsts array so that we favor 'vsplti -1' for
  // cases which are ambiguous (e.g. formation of 0x8000_0000).  'vsplti -1'
  int i = SplatCsts[idx];

  // Figure out what shift amount will be used by altivec if shifted by i in
  // this splat size.
  unsigned TypeShiftAmt = i & (SplatBitSize-1);

  // vsplti + shl self.
  if (SextVal == (int)((unsigned)i << TypeShiftAmt)) {
    SDValue Res = getCanonicalConstSplat(i, SplatSize, MVT::Other, DAG, dl);
    static const unsigned IIDs[] = { // Intrinsic to use for each size.
      Intrinsic::ppc_altivec_vslb, Intrinsic::ppc_altivec_vslh, 0,
      Intrinsic::ppc_altivec_vslw
    };
    Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
    return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
  }

  // vsplti + srl self.
  if (SextVal == (int)((unsigned)i >> TypeShiftAmt)) {
    SDValue Res = getCanonicalConstSplat(i, SplatSize, MVT::Other, DAG, dl);
    static const unsigned IIDs[] = { // Intrinsic to use for each size.
      Intrinsic::ppc_altivec_vsrb, Intrinsic::ppc_altivec_vsrh, 0,
      Intrinsic::ppc_altivec_vsrw
    };
    Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
    return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
  }

  // vsplti + rol self.
  if (SextVal == (int)(((unsigned)i << TypeShiftAmt) |
                       ((unsigned)i >> (SplatBitSize-TypeShiftAmt)))) {
    SDValue Res = getCanonicalConstSplat(i, SplatSize, MVT::Other, DAG, dl);
    static const unsigned IIDs[] = { // Intrinsic to use for each size.
      Intrinsic::ppc_altivec_vrlb, Intrinsic::ppc_altivec_vrlh, 0,
      Intrinsic::ppc_altivec_vrlw
    };
    Res = BuildIntrinsicOp(IIDs[SplatSize-1], Res, Res, DAG, dl);
    return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Res);
  }

  // t = vsplti c, result = vsldoi t, t, 1
  if (SextVal == (int)(((unsigned)i << 8) | (i < 0 ? 0xFF : 0))) {
    SDValue T = getCanonicalConstSplat(i, SplatSize, MVT::v16i8, DAG, dl);
    unsigned Amt = Subtarget.isLittleEndian() ? 15 : 1;
    return BuildVSLDOI(T, T, Amt, Op.getValueType(), DAG, dl);
  }
  // t = vsplti c, result = vsldoi t, t, 2
  if (SextVal == (int)(((unsigned)i << 16) | (i < 0 ? 0xFFFF : 0))) {
    SDValue T = getCanonicalConstSplat(i, SplatSize, MVT::v16i8, DAG, dl);
    unsigned Amt = Subtarget.isLittleEndian() ? 14 : 2;
    return BuildVSLDOI(T, T, Amt, Op.getValueType(), DAG, dl);
  }
  // t = vsplti c, result = vsldoi t, t, 3
  if (SextVal == (int)(((unsigned)i << 24) | (i < 0 ? 0xFFFFFF : 0))) {
    SDValue T = getCanonicalConstSplat(i, SplatSize, MVT::v16i8, DAG, dl);
    unsigned Amt = Subtarget.isLittleEndian() ? 13 : 3;
    return BuildVSLDOI(T, T, Amt, Op.getValueType(), DAG, dl);
  }
}

return SDValue();
9523}

9525/// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
9526/// the specified operations to build the shuffle.
9527static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
                                    SDValue RHS, SelectionDAG &DAG,
                                    const SDLoc &dl) {
unsigned OpNum = (PFEntry >> 26) & 0x0F;
unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
unsigned RHSID = (PFEntry >>  0) & ((1 << 13)-1);

enum {
  OP_COPY = 0,  // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
  OP_VMRGHW,
  OP_VMRGLW,
  OP_VSPLTISW0,
  OP_VSPLTISW1,
  OP_VSPLTISW2,
  OP_VSPLTISW3,
  OP_VSLDOI4,
  OP_VSLDOI8,
  OP_VSLDOI12
};

if (OpNum == OP_COPY) {
  if (LHSID == (1*9+2)*9+3) return LHS;
  assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!")(static_cast <bool> (LHSID == ((4*9+5)*9+6)*9+7 &&
 "Illegal OP_COPY!") ? void (0) : __assert_fail ("LHSID == ((4*9+5)*9+6)*9+7 && \"Illegal OP_COPY!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9549, __extension__
 __PRETTY_FUNCTION__));
  return RHS;
}

SDValue OpLHS, OpRHS;
OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);

int ShufIdxs[16];
switch (OpNum) {
default: llvm_unreachable("Unknown i32 permute!")::llvm::llvm_unreachable_internal("Unknown i32 permute!", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 9559);
case OP_VMRGHW:
  ShufIdxs[ 0] =  0; ShufIdxs[ 1] =  1; ShufIdxs[ 2] =  2; ShufIdxs[ 3] =  3;
  ShufIdxs[ 4] = 16; ShufIdxs[ 5] = 17; ShufIdxs[ 6] = 18; ShufIdxs[ 7] = 19;
  ShufIdxs[ 8] =  4; ShufIdxs[ 9] =  5; ShufIdxs[10] =  6; ShufIdxs[11] =  7;
  ShufIdxs[12] = 20; ShufIdxs[13] = 21; ShufIdxs[14] = 22; ShufIdxs[15] = 23;
  break;
case OP_VMRGLW:
  ShufIdxs[ 0] =  8; ShufIdxs[ 1] =  9; ShufIdxs[ 2] = 10; ShufIdxs[ 3] = 11;
  ShufIdxs[ 4] = 24; ShufIdxs[ 5] = 25; ShufIdxs[ 6] = 26; ShufIdxs[ 7] = 27;
  ShufIdxs[ 8] = 12; ShufIdxs[ 9] = 13; ShufIdxs[10] = 14; ShufIdxs[11] = 15;
  ShufIdxs[12] = 28; ShufIdxs[13] = 29; ShufIdxs[14] = 30; ShufIdxs[15] = 31;
  break;
case OP_VSPLTISW0:
  for (unsigned i = 0; i != 16; ++i)
    ShufIdxs[i] = (i&3)+0;
  break;
case OP_VSPLTISW1:
  for (unsigned i = 0; i != 16; ++i)
    ShufIdxs[i] = (i&3)+4;
  break;
case OP_VSPLTISW2:
  for (unsigned i = 0; i != 16; ++i)
    ShufIdxs[i] = (i&3)+8;
  break;
case OP_VSPLTISW3:
  for (unsigned i = 0; i != 16; ++i)
    ShufIdxs[i] = (i&3)+12;
  break;
case OP_VSLDOI4:
  return BuildVSLDOI(OpLHS, OpRHS, 4, OpLHS.getValueType(), DAG, dl);
case OP_VSLDOI8:
  return BuildVSLDOI(OpLHS, OpRHS, 8, OpLHS.getValueType(), DAG, dl);
case OP_VSLDOI12:
  return BuildVSLDOI(OpLHS, OpRHS, 12, OpLHS.getValueType(), DAG, dl);
}
EVT VT = OpLHS.getValueType();
OpLHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpLHS);
OpRHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OpRHS);
SDValue T = DAG.getVectorShuffle(MVT::v16i8, dl, OpLHS, OpRHS, ShufIdxs);
return DAG.getNode(ISD::BITCAST, dl, VT, T);
9600}

9602/// lowerToVINSERTB - Return the SDValue if this VECTOR_SHUFFLE can be handled
9603/// by the VINSERTB instruction introduced in ISA 3.0, else just return default
9604/// SDValue.
9605SDValue PPCTargetLowering::lowerToVINSERTB(ShuffleVectorSDNode *N,
                                         SelectionDAG &DAG) const {
const unsigned BytesInVector = 16;
bool IsLE = Subtarget.isLittleEndian();
SDLoc dl(N);
SDValue V1 = N->getOperand(0);
SDValue V2 = N->getOperand(1);
unsigned ShiftElts = 0, InsertAtByte = 0;
bool Swap = false;

// Shifts required to get the byte we want at element 7.
unsigned LittleEndianShifts[] = {8, 7,  6,  5,  4,  3,  2,  1,
                                 0, 15, 14, 13, 12, 11, 10, 9};
unsigned BigEndianShifts[] = {9, 10, 11, 12, 13, 14, 15, 0,
                              1, 2,  3,  4,  5,  6,  7,  8};

ArrayRef<int> Mask = N->getMask();
int OriginalOrder[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};

// For each mask element, find out if we're just inserting something
// from V2 into V1 or vice versa.
// Possible permutations inserting an element from V2 into V1:
//   X, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
//   0, X, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
//   ...
//   0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, X
// Inserting from V1 into V2 will be similar, except mask range will be
// [16,31].

bool FoundCandidate = false;
// If both vector operands for the shuffle are the same vector, the mask
// will contain only elements from the first one and the second one will be
// undef.
unsigned VINSERTBSrcElem = IsLE ? 8 : 7;
// Go through the mask of half-words to find an element that's being moved
// from one vector to the other.
for (unsigned i = 0; i < BytesInVector; ++i) {
  unsigned CurrentElement = Mask[i];
  // If 2nd operand is undefined, we should only look for element 7 in the
  // Mask.
  if (V2.isUndef() && CurrentElement != VINSERTBSrcElem)
    continue;

  bool OtherElementsInOrder = true;
  // Examine the other elements in the Mask to see if they're in original
  // order.
  for (unsigned j = 0; j < BytesInVector; ++j) {
    if (j == i)
      continue;
    // If CurrentElement is from V1 [0,15], then we the rest of the Mask to be
    // from V2 [16,31] and vice versa.  Unless the 2nd operand is undefined,
    // in which we always assume we're always picking from the 1st operand.
    int MaskOffset =
        (!V2.isUndef() && CurrentElement < BytesInVector) ? BytesInVector : 0;
    if (Mask[j] != OriginalOrder[j] + MaskOffset) {
      OtherElementsInOrder = false;
      break;
    }
  }
  // If other elements are in original order, we record the number of shifts
  // we need to get the element we want into element 7. Also record which byte
  // in the vector we should insert into.
  if (OtherElementsInOrder) {
    // If 2nd operand is undefined, we assume no shifts and no swapping.
    if (V2.isUndef()) {
      ShiftElts = 0;
      Swap = false;
    } else {
      // Only need the last 4-bits for shifts because operands will be swapped if CurrentElement is >= 2^4.
      ShiftElts = IsLE ? LittleEndianShifts[CurrentElement & 0xF]
                       : BigEndianShifts[CurrentElement & 0xF];
      Swap = CurrentElement < BytesInVector;
    }
    InsertAtByte = IsLE ? BytesInVector - (i + 1) : i;
    FoundCandidate = true;
    break;
  }
}

if (!FoundCandidate)
  return SDValue();

// Candidate found, construct the proper SDAG sequence with VINSERTB,
// optionally with VECSHL if shift is required.
if (Swap)
  std::swap(V1, V2);
if (V2.isUndef())
  V2 = V1;
if (ShiftElts) {
  SDValue Shl = DAG.getNode(PPCISD::VECSHL, dl, MVT::v16i8, V2, V2,
                            DAG.getConstant(ShiftElts, dl, MVT::i32));
  return DAG.getNode(PPCISD::VECINSERT, dl, MVT::v16i8, V1, Shl,
                     DAG.getConstant(InsertAtByte, dl, MVT::i32));
}
return DAG.getNode(PPCISD::VECINSERT, dl, MVT::v16i8, V1, V2,
                   DAG.getConstant(InsertAtByte, dl, MVT::i32));
9701}

9703/// lowerToVINSERTH - Return the SDValue if this VECTOR_SHUFFLE can be handled
9704/// by the VINSERTH instruction introduced in ISA 3.0, else just return default
9705/// SDValue.
9706SDValue PPCTargetLowering::lowerToVINSERTH(ShuffleVectorSDNode *N,
                                         SelectionDAG &DAG) const {
const unsigned NumHalfWords = 8;
const unsigned BytesInVector = NumHalfWords * 2;
// Check that the shuffle is on half-words.
if (!isNByteElemShuffleMask(N, 2, 1))
  return SDValue();

bool IsLE = Subtarget.isLittleEndian();
SDLoc dl(N);
SDValue V1 = N->getOperand(0);
SDValue V2 = N->getOperand(1);
unsigned ShiftElts = 0, InsertAtByte = 0;
bool Swap = false;

// Shifts required to get the half-word we want at element 3.
unsigned LittleEndianShifts[] = {4, 3, 2, 1, 0, 7, 6, 5};
unsigned BigEndianShifts[] = {5, 6, 7, 0, 1, 2, 3, 4};

uint32_t Mask = 0;
uint32_t OriginalOrderLow = 0x1234567;
uint32_t OriginalOrderHigh = 0x89ABCDEF;
// Now we look at mask elements 0,2,4,6,8,10,12,14.  Pack the mask into a
// 32-bit space, only need 4-bit nibbles per element.
for (unsigned i = 0; i < NumHalfWords; ++i) {
  unsigned MaskShift = (NumHalfWords - 1 - i) * 4;
  Mask |= ((uint32_t)(N->getMaskElt(i * 2) / 2) << MaskShift);
}

// For each mask element, find out if we're just inserting something
// from V2 into V1 or vice versa.  Possible permutations inserting an element
// from V2 into V1:
//   X, 1, 2, 3, 4, 5, 6, 7
//   0, X, 2, 3, 4, 5, 6, 7
//   0, 1, X, 3, 4, 5, 6, 7
//   0, 1, 2, X, 4, 5, 6, 7
//   0, 1, 2, 3, X, 5, 6, 7
//   0, 1, 2, 3, 4, X, 6, 7
//   0, 1, 2, 3, 4, 5, X, 7
//   0, 1, 2, 3, 4, 5, 6, X
// Inserting from V1 into V2 will be similar, except mask range will be [8,15].

bool FoundCandidate = false;
// Go through the mask of half-words to find an element that's being moved
// from one vector to the other.
for (unsigned i = 0; i < NumHalfWords; ++i) {
  unsigned MaskShift = (NumHalfWords - 1 - i) * 4;
  uint32_t MaskOneElt = (Mask >> MaskShift) & 0xF;
  uint32_t MaskOtherElts = ~(0xF << MaskShift);
  uint32_t TargetOrder = 0x0;

  // If both vector operands for the shuffle are the same vector, the mask
  // will contain only elements from the first one and the second one will be
  // undef.
  if (V2.isUndef()) {
    ShiftElts = 0;
    unsigned VINSERTHSrcElem = IsLE ? 4 : 3;
    TargetOrder = OriginalOrderLow;
    Swap = false;
    // Skip if not the correct element or mask of other elements don't equal
    // to our expected order.
    if (MaskOneElt == VINSERTHSrcElem &&
        (Mask & MaskOtherElts) == (TargetOrder & MaskOtherElts)) {
      InsertAtByte = IsLE ? BytesInVector - (i + 1) * 2 : i * 2;
      FoundCandidate = true;
      break;
    }
  } else { // If both operands are defined.
    // Target order is [8,15] if the current mask is between [0,7].
    TargetOrder =
        (MaskOneElt < NumHalfWords) ? OriginalOrderHigh : OriginalOrderLow;
    // Skip if mask of other elements don't equal our expected order.
    if ((Mask & MaskOtherElts) == (TargetOrder & MaskOtherElts)) {
      // We only need the last 3 bits for the number of shifts.
      ShiftElts = IsLE ? LittleEndianShifts[MaskOneElt & 0x7]
                       : BigEndianShifts[MaskOneElt & 0x7];
      InsertAtByte = IsLE ? BytesInVector - (i + 1) * 2 : i * 2;
      Swap = MaskOneElt < NumHalfWords;
      FoundCandidate = true;
      break;
    }
  }
}

if (!FoundCandidate)
  return SDValue();

// Candidate found, construct the proper SDAG sequence with VINSERTH,
// optionally with VECSHL if shift is required.
if (Swap)
  std::swap(V1, V2);
if (V2.isUndef())
  V2 = V1;
SDValue Conv1 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
if (ShiftElts) {
  // Double ShiftElts because we're left shifting on v16i8 type.
  SDValue Shl = DAG.getNode(PPCISD::VECSHL, dl, MVT::v16i8, V2, V2,
                            DAG.getConstant(2 * ShiftElts, dl, MVT::i32));
  SDValue Conv2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, Shl);
  SDValue Ins = DAG.getNode(PPCISD::VECINSERT, dl, MVT::v8i16, Conv1, Conv2,
                            DAG.getConstant(InsertAtByte, dl, MVT::i32));
  return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, Ins);
}
SDValue Conv2 = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V2);
SDValue Ins = DAG.getNode(PPCISD::VECINSERT, dl, MVT::v8i16, Conv1, Conv2,
                          DAG.getConstant(InsertAtByte, dl, MVT::i32));
return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, Ins);
9813}

9815/// lowerToXXSPLTI32DX - Return the SDValue if this VECTOR_SHUFFLE can be
9816/// handled by the XXSPLTI32DX instruction introduced in ISA 3.1, otherwise
9817/// return the default SDValue.
9818SDValue PPCTargetLowering::lowerToXXSPLTI32DX(ShuffleVectorSDNode *SVN,
                                            SelectionDAG &DAG) const {
// The LHS and RHS may be bitcasts to v16i8 as we canonicalize shuffles
// to v16i8. Peek through the bitcasts to get the actual operands.
SDValue LHS = peekThroughBitcasts(SVN->getOperand(0));
SDValue RHS = peekThroughBitcasts(SVN->getOperand(1));

auto ShuffleMask = SVN->getMask();
SDValue VecShuffle(SVN, 0);
SDLoc DL(SVN);

// Check that we have a four byte shuffle.
if (!isNByteElemShuffleMask(SVN, 4, 1))
  return SDValue();

// Canonicalize the RHS being a BUILD_VECTOR when lowering to xxsplti32dx.
if (RHS->getOpcode() != ISD::BUILD_VECTOR) {
  std::swap(LHS, RHS);
  VecShuffle = peekThroughBitcasts(DAG.getCommutedVectorShuffle(*SVN));
  ShuffleVectorSDNode *CommutedSV = dyn_cast<ShuffleVectorSDNode>(VecShuffle);
  if (!CommutedSV)
    return SDValue();
  ShuffleMask = CommutedSV->getMask();
}

// Ensure that the RHS is a vector of constants.
BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(RHS.getNode());
if (!BVN)
  return SDValue();

// Check if RHS is a splat of 4-bytes (or smaller).
APInt APSplatValue, APSplatUndef;
unsigned SplatBitSize;
bool HasAnyUndefs;
if (!BVN->isConstantSplat(APSplatValue, APSplatUndef, SplatBitSize,
                          HasAnyUndefs, 0, !Subtarget.isLittleEndian()) ||
    SplatBitSize > 32)
  return SDValue();

// Check that the shuffle mask matches the semantics of XXSPLTI32DX.
// The instruction splats a constant C into two words of the source vector
// producing { C, Unchanged, C, Unchanged } or { Unchanged, C, Unchanged, C }.
// Thus we check that the shuffle mask is the equivalent  of
// <0, [4-7], 2, [4-7]> or <[4-7], 1, [4-7], 3> respectively.
// Note: the check above of isNByteElemShuffleMask() ensures that the bytes
// within each word are consecutive, so we only need to check the first byte.
SDValue Index;
bool IsLE = Subtarget.isLittleEndian();
if ((ShuffleMask[0] == 0 && ShuffleMask[8] == 8) &&
    (ShuffleMask[4] % 4 == 0 && ShuffleMask[12] % 4 == 0 &&
     ShuffleMask[4] > 15 && ShuffleMask[12] > 15))
  Index = DAG.getTargetConstant(IsLE ? 0 : 1, DL, MVT::i32);
else if ((ShuffleMask[4] == 4 && ShuffleMask[12] == 12) &&
         (ShuffleMask[0] % 4 == 0 && ShuffleMask[8] % 4 == 0 &&
          ShuffleMask[0] > 15 && ShuffleMask[8] > 15))
  Index = DAG.getTargetConstant(IsLE ? 1 : 0, DL, MVT::i32);
else
  return SDValue();

// If the splat is narrower than 32-bits, we need to get the 32-bit value
// for XXSPLTI32DX.
unsigned SplatVal = APSplatValue.getZExtValue();
for (; SplatBitSize < 32; SplatBitSize <<= 1)
  SplatVal |= (SplatVal << SplatBitSize);

SDValue SplatNode = DAG.getNode(
    PPCISD::XXSPLTI32DX, DL, MVT::v2i64, DAG.getBitcast(MVT::v2i64, LHS),
    Index, DAG.getTargetConstant(SplatVal, DL, MVT::i32));
return DAG.getNode(ISD::BITCAST, DL, MVT::v16i8, SplatNode);
9887}

9889/// LowerROTL - Custom lowering for ROTL(v1i128) to vector_shuffle(v16i8).
9890/// We lower ROTL(v1i128) to vector_shuffle(v16i8) only if shift amount is
9891/// a multiple of 8. Otherwise convert it to a scalar rotation(i128)
9892/// i.e (or (shl x, C1), (srl x, 128-C1)).
9893SDValue PPCTargetLowering::LowerROTL(SDValue Op, SelectionDAG &DAG) const {
assert(Op.getOpcode() == ISD::ROTL && "Should only be called for ISD::ROTL")(static_cast <bool> (Op.getOpcode() == ISD::ROTL &&
 "Should only be called for ISD::ROTL") ? void (0) : __assert_fail
 ("Op.getOpcode() == ISD::ROTL && \"Should only be called for ISD::ROTL\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9894, __extension__
 __PRETTY_FUNCTION__));
assert(Op.getValueType() == MVT::v1i128 &&(static_cast <bool> (Op.getValueType() == MVT::v1i128 &&
 "Only set v1i128 as custom, other type shouldn't reach here!"
) ? void (0) : __assert_fail ("Op.getValueType() == MVT::v1i128 && \"Only set v1i128 as custom, other type shouldn't reach here!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9896, __extension__
 __PRETTY_FUNCTION__))
       "Only set v1i128 as custom, other type shouldn't reach here!")(static_cast <bool> (Op.getValueType() == MVT::v1i128 &&
 "Only set v1i128 as custom, other type shouldn't reach here!"
) ? void (0) : __assert_fail ("Op.getValueType() == MVT::v1i128 && \"Only set v1i128 as custom, other type shouldn't reach here!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9896, __extension__
 __PRETTY_FUNCTION__));
SDLoc dl(Op);
SDValue N0 = peekThroughBitcasts(Op.getOperand(0));
SDValue N1 = peekThroughBitcasts(Op.getOperand(1));
unsigned SHLAmt = N1.getConstantOperandVal(0);
if (SHLAmt % 8 == 0) {
  std::array<int, 16> Mask;
  std::iota(Mask.begin(), Mask.end(), 0);
  std::rotate(Mask.begin(), Mask.begin() + SHLAmt / 8, Mask.end());
  if (SDValue Shuffle =
          DAG.getVectorShuffle(MVT::v16i8, dl, DAG.getBitcast(MVT::v16i8, N0),
                               DAG.getUNDEF(MVT::v16i8), Mask))
    return DAG.getNode(ISD::BITCAST, dl, MVT::v1i128, Shuffle);
}
SDValue ArgVal = DAG.getBitcast(MVT::i128, N0);
SDValue SHLOp = DAG.getNode(ISD::SHL, dl, MVT::i128, ArgVal,
                            DAG.getConstant(SHLAmt, dl, MVT::i32));
SDValue SRLOp = DAG.getNode(ISD::SRL, dl, MVT::i128, ArgVal,
                            DAG.getConstant(128 - SHLAmt, dl, MVT::i32));
SDValue OROp = DAG.getNode(ISD::OR, dl, MVT::i128, SHLOp, SRLOp);
return DAG.getNode(ISD::BITCAST, dl, MVT::v1i128, OROp);
9917}

9919/// LowerVECTOR_SHUFFLE - Return the code we lower for VECTOR_SHUFFLE.  If this
9920/// is a shuffle we can handle in a single instruction, return it.  Otherwise,
9921/// return the code it can be lowered into.  Worst case, it can always be
9922/// lowered into a vperm.
9923SDValue PPCTargetLowering::LowerVECTOR_SHUFFLE(SDValue Op,
                                             SelectionDAG &DAG) const {
SDLoc dl(Op);
SDValue V1 = Op.getOperand(0);
SDValue V2 = Op.getOperand(1);
ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);

// Any nodes that were combined in the target-independent combiner prior
// to vector legalization will not be sent to the target combine. Try to
// combine it here.
if (SDValue NewShuffle = combineVectorShuffle(SVOp, DAG)) {
1
Taking false branch→
  if (!isa<ShuffleVectorSDNode>(NewShuffle))
    return NewShuffle;
  Op = NewShuffle;
  SVOp = cast<ShuffleVectorSDNode>(Op);
  V1 = Op.getOperand(0);
  V2 = Op.getOperand(1);
}
EVT VT = Op.getValueType();
bool isLittleEndian = Subtarget.isLittleEndian();

unsigned ShiftElts, InsertAtByte;
2
←
'ShiftElts' declared without an initial value→
bool Swap = false;

// If this is a load-and-splat, we can do that with a single instruction
// in some cases. However if the load has multiple uses, we don't want to
// combine it because that will just produce multiple loads.
bool IsPermutedLoad = false;
const SDValue *InputLoad = getNormalLoadInput(V1, IsPermutedLoad);
3
←
Calling 'getNormalLoadInput'→
7
←
Returning from 'getNormalLoadInput'→
if (InputLoad7.1
'InputLoad' is null
 && Subtarget.hasVSX() && V2.isUndef() &&
    (PPC::isSplatShuffleMask(SVOp, 4) || PPC::isSplatShuffleMask(SVOp, 8)) &&
    InputLoad->hasOneUse()) {
  bool IsFourByte = PPC::isSplatShuffleMask(SVOp, 4);
  int SplatIdx =
    PPC::getSplatIdxForPPCMnemonics(SVOp, IsFourByte ? 4 : 8, DAG);

  // The splat index for permuted loads will be in the left half of the vector
  // which is strictly wider than the loaded value by 8 bytes. So we need to
  // adjust the splat index to point to the correct address in memory.
  if (IsPermutedLoad) {
    assert((isLittleEndian || IsFourByte) &&(static_cast <bool> ((isLittleEndian || IsFourByte) &&
 "Unexpected size for permuted load on big endian target") ? void
 (0) : __assert_fail ("(isLittleEndian || IsFourByte) && \"Unexpected size for permuted load on big endian target\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9964, __extension__
 __PRETTY_FUNCTION__))
           "Unexpected size for permuted load on big endian target")(static_cast <bool> ((isLittleEndian || IsFourByte) &&
 "Unexpected size for permuted load on big endian target") ? void
 (0) : __assert_fail ("(isLittleEndian || IsFourByte) && \"Unexpected size for permuted load on big endian target\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9964, __extension__
 __PRETTY_FUNCTION__));
    SplatIdx += IsFourByte ? 2 : 1;
    assert((SplatIdx < (IsFourByte ? 4 : 2)) &&(static_cast <bool> ((SplatIdx < (IsFourByte ? 4 : 2
)) && "Splat of a value outside of the loaded memory"
) ? void (0) : __assert_fail ("(SplatIdx < (IsFourByte ? 4 : 2)) && \"Splat of a value outside of the loaded memory\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9967, __extension__
 __PRETTY_FUNCTION__))
           "Splat of a value outside of the loaded memory")(static_cast <bool> ((SplatIdx < (IsFourByte ? 4 : 2
)) && "Splat of a value outside of the loaded memory"
) ? void (0) : __assert_fail ("(SplatIdx < (IsFourByte ? 4 : 2)) && \"Splat of a value outside of the loaded memory\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 9967, __extension__
 __PRETTY_FUNCTION__));
  }

  LoadSDNode *LD = cast<LoadSDNode>(*InputLoad);
  // For 4-byte load-and-splat, we need Power9.
  if ((IsFourByte && Subtarget.hasP9Vector()) || !IsFourByte) {
    uint64_t Offset = 0;
    if (IsFourByte)
      Offset = isLittleEndian ? (3 - SplatIdx) * 4 : SplatIdx * 4;
    else
      Offset = isLittleEndian ? (1 - SplatIdx) * 8 : SplatIdx * 8;

    // If the width of the load is the same as the width of the splat,
    // loading with an offset would load the wrong memory.
    if (LD->getValueType(0).getSizeInBits() == (IsFourByte ? 32 : 64))
      Offset = 0;

    SDValue BasePtr = LD->getBasePtr();
    if (Offset != 0)
      BasePtr = DAG.getNode(ISD::ADD, dl, getPointerTy(DAG.getDataLayout()),
                            BasePtr, DAG.getIntPtrConstant(Offset, dl));
    SDValue Ops[] = {
      LD->getChain(),    // Chain
      BasePtr,           // BasePtr
      DAG.getValueType(Op.getValueType()) // VT
    };
    SDVTList VTL =
      DAG.getVTList(IsFourByte ? MVT::v4i32 : MVT::v2i64, MVT::Other);
    SDValue LdSplt =
      DAG.getMemIntrinsicNode(PPCISD::LD_SPLAT, dl, VTL,
                              Ops, LD->getMemoryVT(), LD->getMemOperand());
    DAG.ReplaceAllUsesOfValueWith(InputLoad->getValue(1), LdSplt.getValue(1));
    if (LdSplt.getValueType() != SVOp->getValueType(0))
      LdSplt = DAG.getBitcast(SVOp->getValueType(0), LdSplt);
    return LdSplt;
  }
}

// All v2i64 and v2f64 shuffles are legal
if (VT == MVT::v2i64 || VT == MVT::v2f64)
  return Op;

if (Subtarget.hasP9Vector() &&
8
←
Assuming the condition is false→
    PPC::isXXINSERTWMask(SVOp, ShiftElts, InsertAtByte, Swap,
                         isLittleEndian)) {
  if (Swap)
    std::swap(V1, V2);
  SDValue Conv1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V1);
  SDValue Conv2 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V2);
  if (ShiftElts) {
    SDValue Shl = DAG.getNode(PPCISD::VECSHL, dl, MVT::v4i32, Conv2, Conv2,
                              DAG.getConstant(ShiftElts, dl, MVT::i32));
    SDValue Ins = DAG.getNode(PPCISD::VECINSERT, dl, MVT::v4i32, Conv1, Shl,
                              DAG.getConstant(InsertAtByte, dl, MVT::i32));
    return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, Ins);
  }
  SDValue Ins = DAG.getNode(PPCISD::VECINSERT, dl, MVT::v4i32, Conv1, Conv2,
                            DAG.getConstant(InsertAtByte, dl, MVT::i32));
  return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, Ins);
}

if (Subtarget.hasPrefixInstrs()) {
9
←
Assuming the condition is false→
10
←
Taking false branch→
  SDValue SplatInsertNode;
  if ((SplatInsertNode = lowerToXXSPLTI32DX(SVOp, DAG)))
    return SplatInsertNode;
}

if (Subtarget.hasP9Altivec()) {
11
←
Assuming the condition is false→
  SDValue NewISDNode;
  if ((NewISDNode = lowerToVINSERTH(SVOp, DAG)))
    return NewISDNode;

  if ((NewISDNode = lowerToVINSERTB(SVOp, DAG)))
    return NewISDNode;
}

if (Subtarget.hasVSX() &&
12
←
Assuming the condition is true→
32
←
Taking true branch→
    PPC::isXXSLDWIShuffleMask(SVOp, ShiftElts, Swap, isLittleEndian)) {
13
←
Calling 'isXXSLDWIShuffleMask'→
31
←
Returning from 'isXXSLDWIShuffleMask'→
  if (Swap32.1
'Swap' is false
)
33
←
Taking false branch→
    std::swap(V1, V2);
  SDValue Conv1 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V1);
  SDValue Conv2 =
      DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V2.isUndef() ? V1 : V2);
34
←
'?' condition is false→

  SDValue Shl = DAG.getNode(PPCISD::VECSHL, dl, MVT::v4i32, Conv1, Conv2,
                            DAG.getConstant(ShiftElts, dl, MVT::i32));
35
←
1st function call argument is an uninitialized value
  return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, Shl);
}

if (Subtarget.hasVSX() &&
  PPC::isXXPERMDIShuffleMask(SVOp, ShiftElts, Swap, isLittleEndian)) {
  if (Swap)
    std::swap(V1, V2);
  SDValue Conv1 = DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1);
  SDValue Conv2 =
      DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V2.isUndef() ? V1 : V2);

  SDValue PermDI = DAG.getNode(PPCISD::XXPERMDI, dl, MVT::v2i64, Conv1, Conv2,
                            DAG.getConstant(ShiftElts, dl, MVT::i32));
  return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, PermDI);
}

if (Subtarget.hasP9Vector()) {
   if (PPC::isXXBRHShuffleMask(SVOp)) {
    SDValue Conv = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, V1);
    SDValue ReveHWord = DAG.getNode(ISD::BSWAP, dl, MVT::v8i16, Conv);
    return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, ReveHWord);
  } else if (PPC::isXXBRWShuffleMask(SVOp)) {
    SDValue Conv = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V1);
    SDValue ReveWord = DAG.getNode(ISD::BSWAP, dl, MVT::v4i32, Conv);
    return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, ReveWord);
  } else if (PPC::isXXBRDShuffleMask(SVOp)) {
    SDValue Conv = DAG.getNode(ISD::BITCAST, dl, MVT::v2i64, V1);
    SDValue ReveDWord = DAG.getNode(ISD::BSWAP, dl, MVT::v2i64, Conv);
    return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, ReveDWord);
  } else if (PPC::isXXBRQShuffleMask(SVOp)) {
    SDValue Conv = DAG.getNode(ISD::BITCAST, dl, MVT::v1i128, V1);
    SDValue ReveQWord = DAG.getNode(ISD::BSWAP, dl, MVT::v1i128, Conv);
    return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, ReveQWord);
  }
}

if (Subtarget.hasVSX()) {
  if (V2.isUndef() && PPC::isSplatShuffleMask(SVOp, 4)) {
    int SplatIdx = PPC::getSplatIdxForPPCMnemonics(SVOp, 4, DAG);

    SDValue Conv = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, V1);
    SDValue Splat = DAG.getNode(PPCISD::XXSPLT, dl, MVT::v4i32, Conv,
                                DAG.getConstant(SplatIdx, dl, MVT::i32));
    return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, Splat);
  }

  // Left shifts of 8 bytes are actually swaps. Convert accordingly.
  if (V2.isUndef() && PPC::isVSLDOIShuffleMask(SVOp, 1, DAG) == 8) {
    SDValue Conv = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, V1);
    SDValue Swap = DAG.getNode(PPCISD::SWAP_NO_CHAIN, dl, MVT::v2f64, Conv);
    return DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, Swap);
  }
}

// Cases that are handled by instructions that take permute immediates
// (such as vsplt*) should be left as VECTOR_SHUFFLE nodes so they can be
// selected by the instruction selector.
if (V2.isUndef()) {
  if (PPC::isSplatShuffleMask(SVOp, 1) ||
      PPC::isSplatShuffleMask(SVOp, 2) ||
      PPC::isSplatShuffleMask(SVOp, 4) ||
      PPC::isVPKUWUMShuffleMask(SVOp, 1, DAG) ||
      PPC::isVPKUHUMShuffleMask(SVOp, 1, DAG) ||
      PPC::isVSLDOIShuffleMask(SVOp, 1, DAG) != -1 ||
      PPC::isVMRGLShuffleMask(SVOp, 1, 1, DAG) ||
      PPC::isVMRGLShuffleMask(SVOp, 2, 1, DAG) ||
      PPC::isVMRGLShuffleMask(SVOp, 4, 1, DAG) ||
      PPC::isVMRGHShuffleMask(SVOp, 1, 1, DAG) ||
      PPC::isVMRGHShuffleMask(SVOp, 2, 1, DAG) ||
      PPC::isVMRGHShuffleMask(SVOp, 4, 1, DAG) ||
      (Subtarget.hasP8Altivec() && (
       PPC::isVPKUDUMShuffleMask(SVOp, 1, DAG) ||
       PPC::isVMRGEOShuffleMask(SVOp, true, 1, DAG) ||
       PPC::isVMRGEOShuffleMask(SVOp, false, 1, DAG)))) {
    return Op;
  }
}

// Altivec has a variety of "shuffle immediates" that take two vector inputs
// and produce a fixed permutation.  If any of these match, do not lower to
// VPERM.
unsigned int ShuffleKind = isLittleEndian ? 2 : 0;
if (PPC::isVPKUWUMShuffleMask(SVOp, ShuffleKind, DAG) ||
    PPC::isVPKUHUMShuffleMask(SVOp, ShuffleKind, DAG) ||
    PPC::isVSLDOIShuffleMask(SVOp, ShuffleKind, DAG) != -1 ||
    PPC::isVMRGLShuffleMask(SVOp, 1, ShuffleKind, DAG) ||
    PPC::isVMRGLShuffleMask(SVOp, 2, ShuffleKind, DAG) ||
    PPC::isVMRGLShuffleMask(SVOp, 4, ShuffleKind, DAG) ||
    PPC::isVMRGHShuffleMask(SVOp, 1, ShuffleKind, DAG) ||
    PPC::isVMRGHShuffleMask(SVOp, 2, ShuffleKind, DAG) ||
    PPC::isVMRGHShuffleMask(SVOp, 4, ShuffleKind, DAG) ||
    (Subtarget.hasP8Altivec() && (
     PPC::isVPKUDUMShuffleMask(SVOp, ShuffleKind, DAG) ||
     PPC::isVMRGEOShuffleMask(SVOp, true, ShuffleKind, DAG) ||
     PPC::isVMRGEOShuffleMask(SVOp, false, ShuffleKind, DAG))))
  return Op;

// Check to see if this is a shuffle of 4-byte values.  If so, we can use our
// perfect shuffle table to emit an optimal matching sequence.
ArrayRef<int> PermMask = SVOp->getMask();

if (!DisablePerfectShuffle && !isLittleEndian) {
  unsigned PFIndexes[4];
  bool isFourElementShuffle = true;
  for (unsigned i = 0; i != 4 && isFourElementShuffle;
       ++i) {                           // Element number
    unsigned EltNo = 8;                 // Start out undef.
    for (unsigned j = 0; j != 4; ++j) { // Intra-element byte.
      if (PermMask[i * 4 + j] < 0)
        continue; // Undef, ignore it.

      unsigned ByteSource = PermMask[i * 4 + j];
      if ((ByteSource & 3) != j) {
        isFourElementShuffle = false;
        break;
      }

      if (EltNo == 8) {
        EltNo = ByteSource / 4;
      } else if (EltNo != ByteSource / 4) {
        isFourElementShuffle = false;
        break;
      }
    }
    PFIndexes[i] = EltNo;
  }

  // If this shuffle can be expressed as a shuffle of 4-byte elements, use the
  // perfect shuffle vector to determine if it is cost effective to do this as
  // discrete instructions, or whether we should use a vperm.
  // For now, we skip this for little endian until such time as we have a
  // little-endian perfect shuffle table.
  if (isFourElementShuffle) {
    // Compute the index in the perfect shuffle table.
    unsigned PFTableIndex = PFIndexes[0] * 9 * 9 * 9 + PFIndexes[1] * 9 * 9 +
                            PFIndexes[2] * 9 + PFIndexes[3];

    unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
    unsigned Cost = (PFEntry >> 30);

    // Determining when to avoid vperm is tricky.  Many things affect the cost
    // of vperm, particularly how many times the perm mask needs to be
    // computed. For example, if the perm mask can be hoisted out of a loop or
    // is already used (perhaps because there are multiple permutes with the
    // same shuffle mask?) the vperm has a cost of 1.  OTOH, hoisting the
    // permute mask out of the loop requires an extra register.
    //
    // As a compromise, we only emit discrete instructions if the shuffle can
    // be generated in 3 or fewer operations.  When we have loop information
    // available, if this block is within a loop, we should avoid using vperm
    // for 3-operation perms and use a constant pool load instead.
    if (Cost < 3)
      return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
  }
}

// Lower this to a VPERM(V1, V2, V3) expression, where V3 is a constant
// vector that will get spilled to the constant pool.
if (V2.isUndef()) V2 = V1;

return LowerVPERM(Op, DAG, PermMask, VT, V1, V2);
10214}

10216SDValue PPCTargetLowering::LowerVPERM(SDValue Op, SelectionDAG &DAG,
                                    ArrayRef<int> PermMask, EVT VT,
                                    SDValue V1, SDValue V2) const {
unsigned Opcode = PPCISD::VPERM;
EVT ValType = V1.getValueType();
SDLoc dl(Op);
bool NeedSwap = false;
bool isLittleEndian = Subtarget.isLittleEndian();
bool isPPC64 = Subtarget.isPPC64();

// Only need to place items backwards in LE,
// the mask will be properly calculated.
if (isLittleEndian)
  std::swap(V1, V2);

if (Subtarget.hasVSX() && Subtarget.hasP9Vector() &&
    (V1->hasOneUse() || V2->hasOneUse())) {
  LLVM_DEBUG(dbgs() << "At least one of two input vectors are dead - using "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { dbgs() << "At least one of two input vectors are dead - using "
 "XXPERM instead\n"; } } while (false)
                       "XXPERM instead\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { dbgs() << "At least one of two input vectors are dead - using "
 "XXPERM instead\n"; } } while (false);
  Opcode = PPCISD::XXPERM;

  // The second input to XXPERM is also an output so if the second input has
  // multiple uses then copying is necessary, as a result we want the
  // single-use operand to be used as the second input to prevent copying.
  if (!V2->hasOneUse() && V1->hasOneUse()) {
    std::swap(V1, V2);
    NeedSwap = !NeedSwap;
  }
}

// The SHUFFLE_VECTOR mask is almost exactly what we want for vperm, except
// that it is in input element units, not in bytes.  Convert now.

// For little endian, the order of the input vectors is reversed, and
// the permutation mask is complemented with respect to 31.  This is
// necessary to produce proper semantics with the big-endian-based vperm
// instruction.
EVT EltVT = V1.getValueType().getVectorElementType();
unsigned BytesPerElement = EltVT.getSizeInBits() / 8;

bool V1HasXXSWAPD = V1->getOperand(0)->getOpcode() == PPCISD::XXSWAPD;
bool V2HasXXSWAPD = V2->getOperand(0)->getOpcode() == PPCISD::XXSWAPD;

/*
Vectors will be appended like so: [ V1 | v2 ]
XXSWAPD on V1:
[   A   |   B   |   C   |   D   ] -> [   C   |   D   |   A   |   B   ]
   0-3     4-7     8-11   12-15         0-3     4-7     8-11   12-15
i.e.  index of A, B += 8, and index of C, D -= 8.
XXSWAPD on V2:
[   E   |   F   |   G   |   H   ] -> [   G   |   H   |   E   |   F   ]
  16-19   20-23   24-27   28-31        16-19   20-23   24-27   28-31
i.e.  index of E, F += 8, index of G, H -= 8
Swap V1 and V2:
[   V1   |   V2  ] -> [   V2   |   V1   ]
   0-15     16-31        0-15     16-31
i.e.  index of V1 += 16, index of V2 -= 16
*/

SmallVector<SDValue, 16> ResultMask;
for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i) {
  unsigned SrcElt = PermMask[i] < 0 ? 0 : PermMask[i];

  if (Opcode == PPCISD::XXPERM) {
    if (V1HasXXSWAPD) {
      if (SrcElt < 8)
        SrcElt += 8;
      else if (SrcElt < 16)
        SrcElt -= 8;
    }
    if (V2HasXXSWAPD) {
      if (SrcElt > 23)
        SrcElt -= 8;
      else if (SrcElt > 15)
        SrcElt += 8;
    }
    if (NeedSwap) {
      if (SrcElt < 16)
        SrcElt += 16;
      else
        SrcElt -= 16;
    }
  }

  for (unsigned j = 0; j != BytesPerElement; ++j)
    if (isLittleEndian)
      ResultMask.push_back(
          DAG.getConstant(31 - (SrcElt * BytesPerElement + j), dl, MVT::i32));
    else
      ResultMask.push_back(
          DAG.getConstant(SrcElt * BytesPerElement + j, dl, MVT::i32));
}

if (Opcode == PPCISD::XXPERM && (V1HasXXSWAPD || V2HasXXSWAPD)) {
  if (V1HasXXSWAPD) {
    dl = SDLoc(V1->getOperand(0));
    V1 = V1->getOperand(0)->getOperand(1);
  }
  if (V2HasXXSWAPD) {
    dl = SDLoc(V2->getOperand(0));
    V2 = V2->getOperand(0)->getOperand(1);
  }
  if (isPPC64 && ValType != MVT::v2f64)
    V1 = DAG.getBitcast(MVT::v2f64, V1);
  if (isPPC64 && V2.getValueType() != MVT::v2f64)
    V2 = DAG.getBitcast(MVT::v2f64, V2);
}

ShufflesHandledWithVPERM++;
SDValue VPermMask = DAG.getBuildVector(MVT::v16i8, dl, ResultMask);
LLVM_DEBUG({do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
  ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
  if (Opcode == PPCISD::XXPERM) {do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
    dbgs() << "Emitting a XXPERM for the following shuffle:\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
  } else {do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
    dbgs() << "Emitting a VPERM for the following shuffle:\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
  }do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
  SVOp->dump();do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
  dbgs() << "With the following permute control vector:\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
  VPermMask.dump();do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false)
})do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { { ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode
>(Op); if (Opcode == PPCISD::XXPERM) { dbgs() << "Emitting a XXPERM for the following shuffle:\n"
; } else { dbgs() << "Emitting a VPERM for the following shuffle:\n"
; } SVOp->dump(); dbgs() << "With the following permute control vector:\n"
; VPermMask.dump(); }; } } while (false);

if (Opcode == PPCISD::XXPERM)
  VPermMask = DAG.getBitcast(MVT::v4i32, VPermMask);

SDValue VPERMNode =
    DAG.getNode(Opcode, dl, V1.getValueType(), V1, V2, VPermMask);

VPERMNode = DAG.getBitcast(ValType, VPERMNode);
return VPERMNode;
10346}

10348/// getVectorCompareInfo - Given an intrinsic, return false if it is not a
10349/// vector comparison.  If it is, return true and fill in Opc/isDot with
10350/// information about the intrinsic.
10351static bool getVectorCompareInfo(SDValue Intrin, int &CompareOpc,
                               bool &isDot, const PPCSubtarget &Subtarget) {
unsigned IntrinsicID =
    cast<ConstantSDNode>(Intrin.getOperand(0))->getZExtValue();
CompareOpc = -1;
isDot = false;
switch (IntrinsicID) {
default:
  return false;
// Comparison predicates.
case Intrinsic::ppc_altivec_vcmpbfp_p:
  CompareOpc = 966;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpeqfp_p:
  CompareOpc = 198;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpequb_p:
  CompareOpc = 6;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpequh_p:
  CompareOpc = 70;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpequw_p:
  CompareOpc = 134;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpequd_p:
  if (Subtarget.hasVSX() || Subtarget.hasP8Altivec()) {
    CompareOpc = 199;
    isDot = true;
  } else
    return false;
  break;
case Intrinsic::ppc_altivec_vcmpneb_p:
case Intrinsic::ppc_altivec_vcmpneh_p:
case Intrinsic::ppc_altivec_vcmpnew_p:
case Intrinsic::ppc_altivec_vcmpnezb_p:
case Intrinsic::ppc_altivec_vcmpnezh_p:
case Intrinsic::ppc_altivec_vcmpnezw_p:
  if (Subtarget.hasP9Altivec()) {
    switch (IntrinsicID) {
    default:
      llvm_unreachable("Unknown comparison intrinsic.")::llvm::llvm_unreachable_internal("Unknown comparison intrinsic."
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10397);
    case Intrinsic::ppc_altivec_vcmpneb_p:
      CompareOpc = 7;
      break;
    case Intrinsic::ppc_altivec_vcmpneh_p:
      CompareOpc = 71;
      break;
    case Intrinsic::ppc_altivec_vcmpnew_p:
      CompareOpc = 135;
      break;
    case Intrinsic::ppc_altivec_vcmpnezb_p:
      CompareOpc = 263;
      break;
    case Intrinsic::ppc_altivec_vcmpnezh_p:
      CompareOpc = 327;
      break;
    case Intrinsic::ppc_altivec_vcmpnezw_p:
      CompareOpc = 391;
      break;
    }
    isDot = true;
  } else
    return false;
  break;
case Intrinsic::ppc_altivec_vcmpgefp_p:
  CompareOpc = 454;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpgtfp_p:
  CompareOpc = 710;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpgtsb_p:
  CompareOpc = 774;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpgtsh_p:
  CompareOpc = 838;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpgtsw_p:
  CompareOpc = 902;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpgtsd_p:
  if (Subtarget.hasVSX() || Subtarget.hasP8Altivec()) {
    CompareOpc = 967;
    isDot = true;
  } else
    return false;
  break;
case Intrinsic::ppc_altivec_vcmpgtub_p:
  CompareOpc = 518;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpgtuh_p:
  CompareOpc = 582;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpgtuw_p:
  CompareOpc = 646;
  isDot = true;
  break;
case Intrinsic::ppc_altivec_vcmpgtud_p:
  if (Subtarget.hasVSX() || Subtarget.hasP8Altivec()) {
    CompareOpc = 711;
    isDot = true;
  } else
    return false;
  break;

case Intrinsic::ppc_altivec_vcmpequq:
case Intrinsic::ppc_altivec_vcmpgtsq:
case Intrinsic::ppc_altivec_vcmpgtuq:
  if (!Subtarget.isISA3_1())
    return false;
  switch (IntrinsicID) {
  default:
    llvm_unreachable("Unknown comparison intrinsic.")::llvm::llvm_unreachable_internal("Unknown comparison intrinsic."
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10475);
  case Intrinsic::ppc_altivec_vcmpequq:
    CompareOpc = 455;
    break;
  case Intrinsic::ppc_altivec_vcmpgtsq:
    CompareOpc = 903;
    break;
  case Intrinsic::ppc_altivec_vcmpgtuq:
    CompareOpc = 647;
    break;
  }
  break;

// VSX predicate comparisons use the same infrastructure
case Intrinsic::ppc_vsx_xvcmpeqdp_p:
case Intrinsic::ppc_vsx_xvcmpgedp_p:
case Intrinsic::ppc_vsx_xvcmpgtdp_p:
case Intrinsic::ppc_vsx_xvcmpeqsp_p:
case Intrinsic::ppc_vsx_xvcmpgesp_p:
case Intrinsic::ppc_vsx_xvcmpgtsp_p:
  if (Subtarget.hasVSX()) {
    switch (IntrinsicID) {
    case Intrinsic::ppc_vsx_xvcmpeqdp_p:
      CompareOpc = 99;
      break;
    case Intrinsic::ppc_vsx_xvcmpgedp_p:
      CompareOpc = 115;
      break;
    case Intrinsic::ppc_vsx_xvcmpgtdp_p:
      CompareOpc = 107;
      break;
    case Intrinsic::ppc_vsx_xvcmpeqsp_p:
      CompareOpc = 67;
      break;
    case Intrinsic::ppc_vsx_xvcmpgesp_p:
      CompareOpc = 83;
      break;
    case Intrinsic::ppc_vsx_xvcmpgtsp_p:
      CompareOpc = 75;
      break;
    }
    isDot = true;
  } else
    return false;
  break;

// Normal Comparisons.
case Intrinsic::ppc_altivec_vcmpbfp:
  CompareOpc = 966;
  break;
case Intrinsic::ppc_altivec_vcmpeqfp:
  CompareOpc = 198;
  break;
case Intrinsic::ppc_altivec_vcmpequb:
  CompareOpc = 6;
  break;
case Intrinsic::ppc_altivec_vcmpequh:
  CompareOpc = 70;
  break;
case Intrinsic::ppc_altivec_vcmpequw:
  CompareOpc = 134;
  break;
case Intrinsic::ppc_altivec_vcmpequd:
  if (Subtarget.hasP8Altivec())
    CompareOpc = 199;
  else
    return false;
  break;
case Intrinsic::ppc_altivec_vcmpneb:
case Intrinsic::ppc_altivec_vcmpneh:
case Intrinsic::ppc_altivec_vcmpnew:
case Intrinsic::ppc_altivec_vcmpnezb:
case Intrinsic::ppc_altivec_vcmpnezh:
case Intrinsic::ppc_altivec_vcmpnezw:
  if (Subtarget.hasP9Altivec())
    switch (IntrinsicID) {
    default:
      llvm_unreachable("Unknown comparison intrinsic.")::llvm::llvm_unreachable_internal("Unknown comparison intrinsic."
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10552);
    case Intrinsic::ppc_altivec_vcmpneb:
      CompareOpc = 7;
      break;
    case Intrinsic::ppc_altivec_vcmpneh:
      CompareOpc = 71;
      break;
    case Intrinsic::ppc_altivec_vcmpnew:
      CompareOpc = 135;
      break;
    case Intrinsic::ppc_altivec_vcmpnezb:
      CompareOpc = 263;
      break;
    case Intrinsic::ppc_altivec_vcmpnezh:
      CompareOpc = 327;
      break;
    case Intrinsic::ppc_altivec_vcmpnezw:
      CompareOpc = 391;
      break;
    }
  else
    return false;
  break;
case Intrinsic::ppc_altivec_vcmpgefp:
  CompareOpc = 454;
  break;
case Intrinsic::ppc_altivec_vcmpgtfp:
  CompareOpc = 710;
  break;
case Intrinsic::ppc_altivec_vcmpgtsb:
  CompareOpc = 774;
  break;
case Intrinsic::ppc_altivec_vcmpgtsh:
  CompareOpc = 838;
  break;
case Intrinsic::ppc_altivec_vcmpgtsw:
  CompareOpc = 902;
  break;
case Intrinsic::ppc_altivec_vcmpgtsd:
  if (Subtarget.hasP8Altivec())
    CompareOpc = 967;
  else
    return false;
  break;
case Intrinsic::ppc_altivec_vcmpgtub:
  CompareOpc = 518;
  break;
case Intrinsic::ppc_altivec_vcmpgtuh:
  CompareOpc = 582;
  break;
case Intrinsic::ppc_altivec_vcmpgtuw:
  CompareOpc = 646;
  break;
case Intrinsic::ppc_altivec_vcmpgtud:
  if (Subtarget.hasP8Altivec())
    CompareOpc = 711;
  else
    return false;
  break;
case Intrinsic::ppc_altivec_vcmpequq_p:
case Intrinsic::ppc_altivec_vcmpgtsq_p:
case Intrinsic::ppc_altivec_vcmpgtuq_p:
  if (!Subtarget.isISA3_1())
    return false;
  switch (IntrinsicID) {
  default:
    llvm_unreachable("Unknown comparison intrinsic.")::llvm::llvm_unreachable_internal("Unknown comparison intrinsic."
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10618);
  case Intrinsic::ppc_altivec_vcmpequq_p:
    CompareOpc = 455;
    break;
  case Intrinsic::ppc_altivec_vcmpgtsq_p:
    CompareOpc = 903;
    break;
  case Intrinsic::ppc_altivec_vcmpgtuq_p:
    CompareOpc = 647;
    break;
  }
  isDot = true;
  break;
}
return true;
10633}

10635/// LowerINTRINSIC_WO_CHAIN - If this is an intrinsic that we want to custom
10636/// lower, do it, otherwise return null.
10637SDValue PPCTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
                                                 SelectionDAG &DAG) const {
unsigned IntrinsicID =
  cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();

SDLoc dl(Op);

switch (IntrinsicID) {
case Intrinsic::thread_pointer:
  // Reads the thread pointer register, used for __builtin_thread_pointer.
  if (Subtarget.isPPC64())
    return DAG.getRegister(PPC::X13, MVT::i64);
  return DAG.getRegister(PPC::R2, MVT::i32);

case Intrinsic::ppc_mma_disassemble_acc: {
  if (Subtarget.isISAFuture()) {
    EVT ReturnTypes[] = {MVT::v256i1, MVT::v256i1};
    SDValue WideVec = SDValue(DAG.getMachineNode(PPC::DMXXEXTFDMR512, dl,
                                                 ArrayRef(ReturnTypes, 2),
                                                 Op.getOperand(1)),
                              0);
    SmallVector<SDValue, 4> RetOps;
    SDValue Value = SDValue(WideVec.getNode(), 0);
    SDValue Value2 = SDValue(WideVec.getNode(), 1);

    SDValue Extract;
    Extract = DAG.getNode(
        PPCISD::EXTRACT_VSX_REG, dl, MVT::v16i8,
        Subtarget.isLittleEndian() ? Value2 : Value,
        DAG.getConstant(Subtarget.isLittleEndian() ? 1 : 0,
                        dl, getPointerTy(DAG.getDataLayout())));
    RetOps.push_back(Extract);
    Extract = DAG.getNode(
        PPCISD::EXTRACT_VSX_REG, dl, MVT::v16i8,
        Subtarget.isLittleEndian() ? Value2 : Value,
        DAG.getConstant(Subtarget.isLittleEndian() ? 0 : 1,
                        dl, getPointerTy(DAG.getDataLayout())));
    RetOps.push_back(Extract);
    Extract = DAG.getNode(
        PPCISD::EXTRACT_VSX_REG, dl, MVT::v16i8,
        Subtarget.isLittleEndian() ? Value : Value2,
        DAG.getConstant(Subtarget.isLittleEndian() ? 1 : 0,
                        dl, getPointerTy(DAG.getDataLayout())));
    RetOps.push_back(Extract);
    Extract = DAG.getNode(
        PPCISD::EXTRACT_VSX_REG, dl, MVT::v16i8,
        Subtarget.isLittleEndian() ? Value : Value2,
        DAG.getConstant(Subtarget.isLittleEndian() ? 0 : 1,
                        dl, getPointerTy(DAG.getDataLayout())));
    RetOps.push_back(Extract);
    return DAG.getMergeValues(RetOps, dl);
  }
  LLVM_FALLTHROUGH[[fallthrough]];
}
case Intrinsic::ppc_vsx_disassemble_pair: {
  int NumVecs = 2;
  SDValue WideVec = Op.getOperand(1);
  if (IntrinsicID == Intrinsic::ppc_mma_disassemble_acc) {
    NumVecs = 4;
    WideVec = DAG.getNode(PPCISD::XXMFACC, dl, MVT::v512i1, WideVec);
  }
  SmallVector<SDValue, 4> RetOps;
  for (int VecNo = 0; VecNo < NumVecs; VecNo++) {
    SDValue Extract = DAG.getNode(
        PPCISD::EXTRACT_VSX_REG, dl, MVT::v16i8, WideVec,
        DAG.getConstant(Subtarget.isLittleEndian() ? NumVecs - 1 - VecNo
                                                   : VecNo,
                        dl, getPointerTy(DAG.getDataLayout())));
    RetOps.push_back(Extract);
  }
  return DAG.getMergeValues(RetOps, dl);
}

case Intrinsic::ppc_unpack_longdouble: {
  auto *Idx = dyn_cast<ConstantSDNode>(Op.getOperand(2));
  assert(Idx && (Idx->getSExtValue() == 0 || Idx->getSExtValue() == 1) &&(static_cast <bool> (Idx && (Idx->getSExtValue
() == 0 || Idx->getSExtValue() == 1) && "Argument of long double unpack must be 0 or 1!"
) ? void (0) : __assert_fail ("Idx && (Idx->getSExtValue() == 0 || Idx->getSExtValue() == 1) && \"Argument of long double unpack must be 0 or 1!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10713, __extension__
 __PRETTY_FUNCTION__))
         "Argument of long double unpack must be 0 or 1!")(static_cast <bool> (Idx && (Idx->getSExtValue
() == 0 || Idx->getSExtValue() == 1) && "Argument of long double unpack must be 0 or 1!"
) ? void (0) : __assert_fail ("Idx && (Idx->getSExtValue() == 0 || Idx->getSExtValue() == 1) && \"Argument of long double unpack must be 0 or 1!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10713, __extension__
 __PRETTY_FUNCTION__));
  return DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::f64, Op.getOperand(1),
                     DAG.getConstant(!!(Idx->getSExtValue()), dl,
                                     Idx->getValueType(0)));
}

case Intrinsic::ppc_compare_exp_lt:
case Intrinsic::ppc_compare_exp_gt:
case Intrinsic::ppc_compare_exp_eq:
case Intrinsic::ppc_compare_exp_uo: {
  unsigned Pred;
  switch (IntrinsicID) {
  case Intrinsic::ppc_compare_exp_lt:
    Pred = PPC::PRED_LT;
    break;
  case Intrinsic::ppc_compare_exp_gt:
    Pred = PPC::PRED_GT;
    break;
  case Intrinsic::ppc_compare_exp_eq:
    Pred = PPC::PRED_EQ;
    break;
  case Intrinsic::ppc_compare_exp_uo:
    Pred = PPC::PRED_UN;
    break;
  }
  return SDValue(
      DAG.getMachineNode(
          PPC::SELECT_CC_I4, dl, MVT::i32,
          {SDValue(DAG.getMachineNode(PPC::XSCMPEXPDP, dl, MVT::i32,
                                      Op.getOperand(1), Op.getOperand(2)),
                   0),
           DAG.getConstant(1, dl, MVT::i32), DAG.getConstant(0, dl, MVT::i32),
           DAG.getTargetConstant(Pred, dl, MVT::i32)}),
      0);
}
case Intrinsic::ppc_test_data_class: {
  EVT OpVT = Op.getOperand(1).getValueType();
  unsigned CmprOpc = OpVT == MVT::f128 ? PPC::XSTSTDCQP
                                       : (OpVT == MVT::f64 ? PPC::XSTSTDCDP
                                                           : PPC::XSTSTDCSP);
  return SDValue(
      DAG.getMachineNode(
          PPC::SELECT_CC_I4, dl, MVT::i32,
          {SDValue(DAG.getMachineNode(CmprOpc, dl, MVT::i32, Op.getOperand(2),
                                      Op.getOperand(1)),
                   0),
           DAG.getConstant(1, dl, MVT::i32), DAG.getConstant(0, dl, MVT::i32),
           DAG.getTargetConstant(PPC::PRED_EQ, dl, MVT::i32)}),
      0);
}
case Intrinsic::ppc_fnmsub: {
  EVT VT = Op.getOperand(1).getValueType();
  if (!Subtarget.hasVSX() || (!Subtarget.hasFloat128() && VT == MVT::f128))
    return DAG.getNode(
        ISD::FNEG, dl, VT,
        DAG.getNode(ISD::FMA, dl, VT, Op.getOperand(1), Op.getOperand(2),
                    DAG.getNode(ISD::FNEG, dl, VT, Op.getOperand(3))));
  return DAG.getNode(PPCISD::FNMSUB, dl, VT, Op.getOperand(1),
                     Op.getOperand(2), Op.getOperand(3));
}
case Intrinsic::ppc_convert_f128_to_ppcf128:
case Intrinsic::ppc_convert_ppcf128_to_f128: {
  RTLIB::Libcall LC = IntrinsicID == Intrinsic::ppc_convert_ppcf128_to_f128
                          ? RTLIB::CONVERT_PPCF128_F128
                          : RTLIB::CONVERT_F128_PPCF128;
  MakeLibCallOptions CallOptions;
  std::pair<SDValue, SDValue> Result =
      makeLibCall(DAG, LC, Op.getValueType(), Op.getOperand(1), CallOptions,
                  dl, SDValue());
  return Result.first;
}
case Intrinsic::ppc_maxfe:
case Intrinsic::ppc_maxfl:
case Intrinsic::ppc_maxfs:
case Intrinsic::ppc_minfe:
case Intrinsic::ppc_minfl:
case Intrinsic::ppc_minfs: {
  EVT VT = Op.getValueType();
  assert((static_cast <bool> (all_of(Op->ops().drop_front(4),
 [VT](const SDUse &Use) { return Use.getValueType() == VT
; }) && "ppc_[max|min]f[e|l|s] must have uniform type arguments"
) ? void (0) : __assert_fail ("all_of(Op->ops().drop_front(4), [VT](const SDUse &Use) { return Use.getValueType() == VT; }) && \"ppc_[max|min]f[e|l|s] must have uniform type arguments\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10794, __extension__
 __PRETTY_FUNCTION__))
      all_of(Op->ops().drop_front(4),(static_cast <bool> (all_of(Op->ops().drop_front(4),
 [VT](const SDUse &Use) { return Use.getValueType() == VT
; }) && "ppc_[max|min]f[e|l|s] must have uniform type arguments"
) ? void (0) : __assert_fail ("all_of(Op->ops().drop_front(4), [VT](const SDUse &Use) { return Use.getValueType() == VT; }) && \"ppc_[max|min]f[e|l|s] must have uniform type arguments\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10794, __extension__
 __PRETTY_FUNCTION__))
             [VT](const SDUse &Use) { return Use.getValueType() == VT; }) &&(static_cast <bool> (all_of(Op->ops().drop_front(4),
 [VT](const SDUse &Use) { return Use.getValueType() == VT
; }) && "ppc_[max|min]f[e|l|s] must have uniform type arguments"
) ? void (0) : __assert_fail ("all_of(Op->ops().drop_front(4), [VT](const SDUse &Use) { return Use.getValueType() == VT; }) && \"ppc_[max|min]f[e|l|s] must have uniform type arguments\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10794, __extension__
 __PRETTY_FUNCTION__))
      "ppc_[max|min]f[e|l|s] must have uniform type arguments")(static_cast <bool> (all_of(Op->ops().drop_front(4),
 [VT](const SDUse &Use) { return Use.getValueType() == VT
; }) && "ppc_[max|min]f[e|l|s] must have uniform type arguments"
) ? void (0) : __assert_fail ("all_of(Op->ops().drop_front(4), [VT](const SDUse &Use) { return Use.getValueType() == VT; }) && \"ppc_[max|min]f[e|l|s] must have uniform type arguments\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10794, __extension__
 __PRETTY_FUNCTION__));
  (void)VT;
  ISD::CondCode CC = ISD::SETGT;
  if (IntrinsicID == Intrinsic::ppc_minfe ||
      IntrinsicID == Intrinsic::ppc_minfl ||
      IntrinsicID == Intrinsic::ppc_minfs)
    CC = ISD::SETLT;
  unsigned I = Op.getNumOperands() - 2, Cnt = I;
  SDValue Res = Op.getOperand(I);
  for (--I; Cnt != 0; --Cnt, I = (--I == 0 ? (Op.getNumOperands() - 1) : I)) {
    Res =
        DAG.getSelectCC(dl, Res, Op.getOperand(I), Res, Op.getOperand(I), CC);
  }
  return Res;
}
}

// If this is a lowered altivec predicate compare, CompareOpc is set to the
// opcode number of the comparison.
int CompareOpc;
bool isDot;
if (!getVectorCompareInfo(Op, CompareOpc, isDot, Subtarget))
  return SDValue();    // Don't custom lower most intrinsics.

// If this is a non-dot comparison, make the VCMP node and we are done.
if (!isDot) {
  SDValue Tmp = DAG.getNode(PPCISD::VCMP, dl, Op.getOperand(2).getValueType(),
                            Op.getOperand(1), Op.getOperand(2),
                            DAG.getConstant(CompareOpc, dl, MVT::i32));
  return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Tmp);
}

// Create the PPCISD altivec 'dot' comparison node.
SDValue Ops[] = {
  Op.getOperand(2),  // LHS
  Op.getOperand(3),  // RHS
  DAG.getConstant(CompareOpc, dl, MVT::i32)
};
EVT VTs[] = { Op.getOperand(2).getValueType(), MVT::Glue };
SDValue CompNode = DAG.getNode(PPCISD::VCMP_rec, dl, VTs, Ops);

// Now that we have the comparison, emit a copy from the CR to a GPR.
// This is flagged to the above dot comparison.
SDValue Flags = DAG.getNode(PPCISD::MFOCRF, dl, MVT::i32,
                              DAG.getRegister(PPC::CR6, MVT::i32),
                              CompNode.getValue(1));

// Unpack the result based on how the target uses it.
unsigned BitNo;   // Bit # of CR6.
bool InvertBit;   // Invert result?
switch (cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue()) {
default:  // Can't happen, don't crash on invalid number though.
case 0:   // Return the value of the EQ bit of CR6.
  BitNo = 0; InvertBit = false;
  break;
case 1:   // Return the inverted value of the EQ bit of CR6.
  BitNo = 0; InvertBit = true;
  break;
case 2:   // Return the value of the LT bit of CR6.
  BitNo = 2; InvertBit = false;
  break;
case 3:   // Return the inverted value of the LT bit of CR6.
  BitNo = 2; InvertBit = true;
  break;
}

// Shift the bit into the low position.
Flags = DAG.getNode(ISD::SRL, dl, MVT::i32, Flags,
                    DAG.getConstant(8 - (3 - BitNo), dl, MVT::i32));
// Isolate the bit.
Flags = DAG.getNode(ISD::AND, dl, MVT::i32, Flags,
                    DAG.getConstant(1, dl, MVT::i32));

// If we are supposed to, toggle the bit.
if (InvertBit)
  Flags = DAG.getNode(ISD::XOR, dl, MVT::i32, Flags,
                      DAG.getConstant(1, dl, MVT::i32));
return Flags;
10872}

10874SDValue PPCTargetLowering::LowerINTRINSIC_VOID(SDValue Op,
                                             SelectionDAG &DAG) const {
// SelectionDAGBuilder::visitTargetIntrinsic may insert one extra chain to
// the beginning of the argument list.
int ArgStart = isa<ConstantSDNode>(Op.getOperand(0)) ? 0 : 1;
SDLoc DL(Op);
switch (cast<ConstantSDNode>(Op.getOperand(ArgStart))->getZExtValue()) {
case Intrinsic::ppc_cfence: {
  assert(ArgStart == 1 && "llvm.ppc.cfence must carry a chain argument.")(static_cast <bool> (ArgStart == 1 && "llvm.ppc.cfence must carry a chain argument."
) ? void (0) : __assert_fail ("ArgStart == 1 && \"llvm.ppc.cfence must carry a chain argument.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10882, __extension__
 __PRETTY_FUNCTION__));
  assert(Subtarget.isPPC64() && "Only 64-bit is supported for now.")(static_cast <bool> (Subtarget.isPPC64() && "Only 64-bit is supported for now."
) ? void (0) : __assert_fail ("Subtarget.isPPC64() && \"Only 64-bit is supported for now.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10883, __extension__
 __PRETTY_FUNCTION__));
  SDValue Val = Op.getOperand(ArgStart + 1);
  EVT Ty = Val.getValueType();
  if (Ty == MVT::i128) {
    // FIXME: Testing one of two paired registers is sufficient to guarantee
    // ordering?
    Val = DAG.getNode(ISD::TRUNCATE, DL, MVT::i64, Val);
  }
  return SDValue(
      DAG.getMachineNode(PPC::CFENCE8, DL, MVT::Other,
                         DAG.getNode(ISD::ANY_EXTEND, DL, MVT::i64, Val),
                         Op.getOperand(0)),
      0);
}
default:
  break;
}
return SDValue();
10901}

10903// Lower scalar BSWAP64 to xxbrd.
10904SDValue PPCTargetLowering::LowerBSWAP(SDValue Op, SelectionDAG &DAG) const {
SDLoc dl(Op);
if (!Subtarget.isPPC64())
  return Op;
// MTVSRDD
Op = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2i64, Op.getOperand(0),
                 Op.getOperand(0));
// XXBRD
Op = DAG.getNode(ISD::BSWAP, dl, MVT::v2i64, Op);
// MFVSRD
int VectorIndex = 0;
if (Subtarget.isLittleEndian())
  VectorIndex = 1;
Op = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64, Op,
                 DAG.getTargetConstant(VectorIndex, dl, MVT::i32));
return Op;
10920}

10922// ATOMIC_CMP_SWAP for i8/i16 needs to zero-extend its input since it will be
10923// compared to a value that is atomically loaded (atomic loads zero-extend).
10924SDValue PPCTargetLowering::LowerATOMIC_CMP_SWAP(SDValue Op,
                                              SelectionDAG &DAG) const {
assert(Op.getOpcode() == ISD::ATOMIC_CMP_SWAP &&(static_cast <bool> (Op.getOpcode() == ISD::ATOMIC_CMP_SWAP
 && "Expecting an atomic compare-and-swap here.") ? void
 (0) : __assert_fail ("Op.getOpcode() == ISD::ATOMIC_CMP_SWAP && \"Expecting an atomic compare-and-swap here.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10927, __extension__
 __PRETTY_FUNCTION__))
       "Expecting an atomic compare-and-swap here.")(static_cast <bool> (Op.getOpcode() == ISD::ATOMIC_CMP_SWAP
 && "Expecting an atomic compare-and-swap here.") ? void
 (0) : __assert_fail ("Op.getOpcode() == ISD::ATOMIC_CMP_SWAP && \"Expecting an atomic compare-and-swap here.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10927, __extension__
 __PRETTY_FUNCTION__));
SDLoc dl(Op);
auto *AtomicNode = cast<AtomicSDNode>(Op.getNode());
EVT MemVT = AtomicNode->getMemoryVT();
if (MemVT.getSizeInBits() >= 32)
  return Op;

SDValue CmpOp = Op.getOperand(2);
// If this is already correctly zero-extended, leave it alone.
auto HighBits = APInt::getHighBitsSet(32, 32 - MemVT.getSizeInBits());
if (DAG.MaskedValueIsZero(CmpOp, HighBits))
  return Op;

// Clear the high bits of the compare operand.
unsigned MaskVal = (1 << MemVT.getSizeInBits()) - 1;
SDValue NewCmpOp =
  DAG.getNode(ISD::AND, dl, MVT::i32, CmpOp,
              DAG.getConstant(MaskVal, dl, MVT::i32));

// Replace the existing compare operand with the properly zero-extended one.
SmallVector<SDValue, 4> Ops;
for (int i = 0, e = AtomicNode->getNumOperands(); i < e; i++)
  Ops.push_back(AtomicNode->getOperand(i));
Ops[2] = NewCmpOp;
MachineMemOperand *MMO = AtomicNode->getMemOperand();
SDVTList Tys = DAG.getVTList(MVT::i32, MVT::Other);
auto NodeTy =
  (MemVT == MVT::i8) ? PPCISD::ATOMIC_CMP_SWAP_8 : PPCISD::ATOMIC_CMP_SWAP_16;
return DAG.getMemIntrinsicNode(NodeTy, dl, Tys, Ops, MemVT, MMO);
10956}

10958SDValue PPCTargetLowering::LowerATOMIC_LOAD_STORE(SDValue Op,
                                                SelectionDAG &DAG) const {
AtomicSDNode *N = cast<AtomicSDNode>(Op.getNode());
EVT MemVT = N->getMemoryVT();
assert(MemVT.getSimpleVT() == MVT::i128 &&(static_cast <bool> (MemVT.getSimpleVT() == MVT::i128 &&
 "Expect quadword atomic operations") ? void (0) : __assert_fail
 ("MemVT.getSimpleVT() == MVT::i128 && \"Expect quadword atomic operations\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10963, __extension__
 __PRETTY_FUNCTION__))
       "Expect quadword atomic operations")(static_cast <bool> (MemVT.getSimpleVT() == MVT::i128 &&
 "Expect quadword atomic operations") ? void (0) : __assert_fail
 ("MemVT.getSimpleVT() == MVT::i128 && \"Expect quadword atomic operations\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 10963, __extension__
 __PRETTY_FUNCTION__));
SDLoc dl(N);
unsigned Opc = N->getOpcode();
switch (Opc) {
case ISD::ATOMIC_LOAD: {
  // Lower quadword atomic load to int_ppc_atomic_load_i128 which will be
  // lowered to ppc instructions by pattern matching instruction selector.
  SDVTList Tys = DAG.getVTList(MVT::i64, MVT::i64, MVT::Other);
  SmallVector<SDValue, 4> Ops{
      N->getOperand(0),
      DAG.getConstant(Intrinsic::ppc_atomic_load_i128, dl, MVT::i32)};
  for (int I = 1, E = N->getNumOperands(); I < E; ++I)
    Ops.push_back(N->getOperand(I));
  SDValue LoadedVal = DAG.getMemIntrinsicNode(ISD::INTRINSIC_W_CHAIN, dl, Tys,
                                              Ops, MemVT, N->getMemOperand());
  SDValue ValLo = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i128, LoadedVal);
  SDValue ValHi =
      DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i128, LoadedVal.getValue(1));
  ValHi = DAG.getNode(ISD::SHL, dl, MVT::i128, ValHi,
                      DAG.getConstant(64, dl, MVT::i32));
  SDValue Val =
      DAG.getNode(ISD::OR, dl, {MVT::i128, MVT::Other}, {ValLo, ValHi});
  return DAG.getNode(ISD::MERGE_VALUES, dl, {MVT::i128, MVT::Other},
                     {Val, LoadedVal.getValue(2)});
}
case ISD::ATOMIC_STORE: {
  // Lower quadword atomic store to int_ppc_atomic_store_i128 which will be
  // lowered to ppc instructions by pattern matching instruction selector.
  SDVTList Tys = DAG.getVTList(MVT::Other);
  SmallVector<SDValue, 4> Ops{
      N->getOperand(0),
      DAG.getConstant(Intrinsic::ppc_atomic_store_i128, dl, MVT::i32)};
  SDValue Val = N->getOperand(2);
  SDValue ValLo = DAG.getNode(ISD::TRUNCATE, dl, MVT::i64, Val);
  SDValue ValHi = DAG.getNode(ISD::SRL, dl, MVT::i128, Val,
                              DAG.getConstant(64, dl, MVT::i32));
  ValHi = DAG.getNode(ISD::TRUNCATE, dl, MVT::i64, ValHi);
  Ops.push_back(ValLo);
  Ops.push_back(ValHi);
  Ops.push_back(N->getOperand(1));
  return DAG.getMemIntrinsicNode(ISD::INTRINSIC_VOID, dl, Tys, Ops, MemVT,
                                 N->getMemOperand());
}
default:
  llvm_unreachable("Unexpected atomic opcode")::llvm::llvm_unreachable_internal("Unexpected atomic opcode",
 "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11007);
}
11009}

11011static SDValue getDataClassTest(SDValue Op, FPClassTest Mask, const SDLoc &Dl,
                              SelectionDAG &DAG,
                              const PPCSubtarget &Subtarget) {
assert(Mask <= fcAllFlags && "Invalid fp_class flags!")(static_cast <bool> (Mask <= fcAllFlags && "Invalid fp_class flags!"
) ? void (0) : __assert_fail ("Mask <= fcAllFlags && \"Invalid fp_class flags!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11014, __extension__
 __PRETTY_FUNCTION__));

enum DataClassMask {
  DC_NAN = 1 << 6,
  DC_NEG_INF = 1 << 4,
  DC_POS_INF = 1 << 5,
  DC_NEG_ZERO = 1 << 2,
  DC_POS_ZERO = 1 << 3,
  DC_NEG_SUBNORM = 1,
  DC_POS_SUBNORM = 1 << 1,
};

EVT VT = Op.getValueType();

unsigned TestOp = VT == MVT::f128  ? PPC::XSTSTDCQP
                  : VT == MVT::f64 ? PPC::XSTSTDCDP
                                   : PPC::XSTSTDCSP;

if (Mask == fcAllFlags)
  return DAG.getBoolConstant(true, Dl, MVT::i1, VT);
if (Mask == 0)
  return DAG.getBoolConstant(false, Dl, MVT::i1, VT);

// When it's cheaper or necessary to test reverse flags.
if ((Mask & fcNormal) == fcNormal || Mask == ~fcQNan || Mask == ~fcSNan) {
  SDValue Rev = getDataClassTest(Op, ~Mask, Dl, DAG, Subtarget);
  return DAG.getNOT(Dl, Rev, MVT::i1);
}

// Power doesn't support testing whether a value is 'normal'. Test the rest
// first, and test if it's 'not not-normal' with expected sign.
if (Mask & fcNormal) {
  SDValue Rev(DAG.getMachineNode(
                  TestOp, Dl, MVT::i32,
                  DAG.getTargetConstant(DC_NAN | DC_NEG_INF | DC_POS_INF |
                                            DC_NEG_ZERO | DC_POS_ZERO |
                                            DC_NEG_SUBNORM | DC_POS_SUBNORM,
                                        Dl, MVT::i32),
                  Op),
              0);
  // Sign are stored in CR bit 0, result are in CR bit 2.
  SDValue Sign(
      DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, Dl, MVT::i1, Rev,
                         DAG.getTargetConstant(PPC::sub_lt, Dl, MVT::i32)),
      0);
  SDValue Normal(DAG.getNOT(
      Dl,
      SDValue(DAG.getMachineNode(
                  TargetOpcode::EXTRACT_SUBREG, Dl, MVT::i1, Rev,
                  DAG.getTargetConstant(PPC::sub_eq, Dl, MVT::i32)),
              0),
      MVT::i1));
  if (Mask & fcPosNormal)
    Sign = DAG.getNOT(Dl, Sign, MVT::i1);
  SDValue Result = DAG.getNode(ISD::AND, Dl, MVT::i1, Sign, Normal);
  if (Mask == fcPosNormal || Mask == fcNegNormal)
    return Result;

  return DAG.getNode(
      ISD::OR, Dl, MVT::i1,
      getDataClassTest(Op, Mask & ~fcNormal, Dl, DAG, Subtarget), Result);
}

// The instruction doesn't differentiate between signaling or quiet NaN. Test
// the rest first, and test if it 'is NaN and is signaling/quiet'.
if ((Mask & fcNan) == fcQNan || (Mask & fcNan) == fcSNan) {
  bool IsQuiet = Mask & fcQNan;
  SDValue NanCheck = getDataClassTest(Op, fcNan, Dl, DAG, Subtarget);

  // Quietness is determined by the first bit in fraction field.
  uint64_t QuietMask = 0;
  SDValue HighWord;
  if (VT == MVT::f128) {
    HighWord = DAG.getNode(
        ISD::EXTRACT_VECTOR_ELT, Dl, MVT::i32, DAG.getBitcast(MVT::v4i32, Op),
        DAG.getVectorIdxConstant(Subtarget.isLittleEndian() ? 3 : 0, Dl));
    QuietMask = 0x8000;
  } else if (VT == MVT::f64) {
    if (Subtarget.isPPC64()) {
      HighWord = DAG.getNode(ISD::EXTRACT_ELEMENT, Dl, MVT::i32,
                             DAG.getBitcast(MVT::i64, Op),
                             DAG.getConstant(1, Dl, MVT::i32));
    } else {
      SDValue Vec = DAG.getBitcast(
          MVT::v4i32, DAG.getNode(ISD::SCALAR_TO_VECTOR, Dl, MVT::v2f64, Op));
      HighWord = DAG.getNode(
          ISD::EXTRACT_VECTOR_ELT, Dl, MVT::i32, Vec,
          DAG.getVectorIdxConstant(Subtarget.isLittleEndian() ? 1 : 0, Dl));
    }
    QuietMask = 0x80000;
  } else if (VT == MVT::f32) {
    HighWord = DAG.getBitcast(MVT::i32, Op);
    QuietMask = 0x400000;
  }
  SDValue NanRes = DAG.getSetCC(
      Dl, MVT::i1,
      DAG.getNode(ISD::AND, Dl, MVT::i32, HighWord,
                  DAG.getConstant(QuietMask, Dl, MVT::i32)),
      DAG.getConstant(0, Dl, MVT::i32), IsQuiet ? ISD::SETNE : ISD::SETEQ);
  NanRes = DAG.getNode(ISD::AND, Dl, MVT::i1, NanCheck, NanRes);
  if (Mask == fcQNan || Mask == fcSNan)
    return NanRes;

  return DAG.getNode(ISD::OR, Dl, MVT::i1,
                     getDataClassTest(Op, Mask & ~fcNan, Dl, DAG, Subtarget),
                     NanRes);
}

unsigned NativeMask = 0;
if ((Mask & fcNan) == fcNan)
  NativeMask |= DC_NAN;
if (Mask & fcNegInf)
  NativeMask |= DC_NEG_INF;
if (Mask & fcPosInf)
  NativeMask |= DC_POS_INF;
if (Mask & fcNegZero)
  NativeMask |= DC_NEG_ZERO;
if (Mask & fcPosZero)
  NativeMask |= DC_POS_ZERO;
if (Mask & fcNegSubnormal)
  NativeMask |= DC_NEG_SUBNORM;
if (Mask & fcPosSubnormal)
  NativeMask |= DC_POS_SUBNORM;
return SDValue(
    DAG.getMachineNode(
        TargetOpcode::EXTRACT_SUBREG, Dl, MVT::i1,
        SDValue(DAG.getMachineNode(
                    TestOp, Dl, MVT::i32,
                    DAG.getTargetConstant(NativeMask, Dl, MVT::i32), Op),
                0),
        DAG.getTargetConstant(PPC::sub_eq, Dl, MVT::i32)),
    0);
11146}

11148SDValue PPCTargetLowering::LowerIS_FPCLASS(SDValue Op,
                                         SelectionDAG &DAG) const {
assert(Subtarget.hasP9Vector() && "Test data class requires Power9")(static_cast <bool> (Subtarget.hasP9Vector() &&
 "Test data class requires Power9") ? void (0) : __assert_fail
 ("Subtarget.hasP9Vector() && \"Test data class requires Power9\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11150, __extension__
 __PRETTY_FUNCTION__));
SDValue LHS = Op.getOperand(0);
const auto *RHS = cast<ConstantSDNode>(Op.getOperand(1));
SDLoc Dl(Op);
FPClassTest Category = static_cast<FPClassTest>(RHS->getZExtValue());
return getDataClassTest(LHS, Category, Dl, DAG, Subtarget);
11156}

11158SDValue PPCTargetLowering::LowerSCALAR_TO_VECTOR(SDValue Op,
                                               SelectionDAG &DAG) const {
SDLoc dl(Op);
// Create a stack slot that is 16-byte aligned.
MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo();
int FrameIdx = MFI.CreateStackObject(16, Align(16), false);
EVT PtrVT = getPointerTy(DAG.getDataLayout());
SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);

// Store the input value into Value#0 of the stack slot.
SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0), FIdx,
                             MachinePointerInfo());
// Load it out.
return DAG.getLoad(Op.getValueType(), dl, Store, FIdx, MachinePointerInfo());
11172}

11174SDValue PPCTargetLowering::LowerINSERT_VECTOR_ELT(SDValue Op,
                                                SelectionDAG &DAG) const {
assert(Op.getOpcode() == ISD::INSERT_VECTOR_ELT &&(static_cast <bool> (Op.getOpcode() == ISD::INSERT_VECTOR_ELT
 && "Should only be called for ISD::INSERT_VECTOR_ELT"
) ? void (0) : __assert_fail ("Op.getOpcode() == ISD::INSERT_VECTOR_ELT && \"Should only be called for ISD::INSERT_VECTOR_ELT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11177, __extension__
 __PRETTY_FUNCTION__))
       "Should only be called for ISD::INSERT_VECTOR_ELT")(static_cast <bool> (Op.getOpcode() == ISD::INSERT_VECTOR_ELT
 && "Should only be called for ISD::INSERT_VECTOR_ELT"
) ? void (0) : __assert_fail ("Op.getOpcode() == ISD::INSERT_VECTOR_ELT && \"Should only be called for ISD::INSERT_VECTOR_ELT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11177, __extension__
 __PRETTY_FUNCTION__));

ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(2));

EVT VT = Op.getValueType();
SDLoc dl(Op);
SDValue V1 = Op.getOperand(0);
SDValue V2 = Op.getOperand(1);

if (VT == MVT::v2f64 && C)
  return Op;

if (Subtarget.hasP9Vector()) {
  // A f32 load feeding into a v4f32 insert_vector_elt is handled in this way
  // because on P10, it allows this specific insert_vector_elt load pattern to
  // utilize the refactored load and store infrastructure in order to exploit
  // prefixed loads.
  // On targets with inexpensive direct moves (Power9 and up), a
  // (insert_vector_elt v4f32:$vec, (f32 load)) is always better as an integer
  // load since a single precision load will involve conversion to double
  // precision on the load followed by another conversion to single precision.
  if ((VT == MVT::v4f32) && (V2.getValueType() == MVT::f32) &&
      (isa<LoadSDNode>(V2))) {
    SDValue BitcastVector = DAG.getBitcast(MVT::v4i32, V1);
    SDValue BitcastLoad = DAG.getBitcast(MVT::i32, V2);
    SDValue InsVecElt =
        DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v4i32, BitcastVector,
                    BitcastLoad, Op.getOperand(2));
    return DAG.getBitcast(MVT::v4f32, InsVecElt);
  }
}

if (Subtarget.isISA3_1()) {
  if ((VT == MVT::v2i64 || VT == MVT::v2f64) && !Subtarget.isPPC64())
    return SDValue();
  // On P10, we have legal lowering for constant and variable indices for
  // all vectors.
  if (VT == MVT::v16i8 || VT == MVT::v8i16 || VT == MVT::v4i32 ||
      VT == MVT::v2i64 || VT == MVT::v4f32 || VT == MVT::v2f64)
    return Op;
}

// Before P10, we have legal lowering for constant indices but not for
// variable ones.
if (!C)
  return SDValue();

// We can use MTVSRZ + VECINSERT for v8i16 and v16i8 types.
if (VT == MVT::v8i16 || VT == MVT::v16i8) {
  SDValue Mtvsrz = DAG.getNode(PPCISD::MTVSRZ, dl, VT, V2);
  unsigned BytesInEachElement = VT.getVectorElementType().getSizeInBits() / 8;
  unsigned InsertAtElement = C->getZExtValue();
  unsigned InsertAtByte = InsertAtElement * BytesInEachElement;
  if (Subtarget.isLittleEndian()) {
    InsertAtByte = (16 - BytesInEachElement) - InsertAtByte;
  }
  return DAG.getNode(PPCISD::VECINSERT, dl, VT, V1, Mtvsrz,
                     DAG.getConstant(InsertAtByte, dl, MVT::i32));
}
return Op;
11237}

11239SDValue PPCTargetLowering::LowerVectorLoad(SDValue Op,
                                         SelectionDAG &DAG) const {
SDLoc dl(Op);
LoadSDNode *LN = cast<LoadSDNode>(Op.getNode());
SDValue LoadChain = LN->getChain();
SDValue BasePtr = LN->getBasePtr();
EVT VT = Op.getValueType();

if (VT != MVT::v256i1 && VT != MVT::v512i1)
  return Op;

// Type v256i1 is used for pairs and v512i1 is used for accumulators.
// Here we create 2 or 4 v16i8 loads to load the pair or accumulator value in
// 2 or 4 vsx registers.
assert((VT != MVT::v512i1 || Subtarget.hasMMA()) &&(static_cast <bool> ((VT != MVT::v512i1 || Subtarget.hasMMA
()) && "Type unsupported without MMA") ? void (0) : __assert_fail
 ("(VT != MVT::v512i1 || Subtarget.hasMMA()) && \"Type unsupported without MMA\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11254, __extension__
 __PRETTY_FUNCTION__))
       "Type unsupported without MMA")(static_cast <bool> ((VT != MVT::v512i1 || Subtarget.hasMMA
()) && "Type unsupported without MMA") ? void (0) : __assert_fail
 ("(VT != MVT::v512i1 || Subtarget.hasMMA()) && \"Type unsupported without MMA\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11254, __extension__
 __PRETTY_FUNCTION__));
assert((VT != MVT::v256i1 || Subtarget.pairedVectorMemops()) &&(static_cast <bool> ((VT != MVT::v256i1 || Subtarget.pairedVectorMemops
()) && "Type unsupported without paired vector support"
) ? void (0) : __assert_fail ("(VT != MVT::v256i1 || Subtarget.pairedVectorMemops()) && \"Type unsupported without paired vector support\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11256, __extension__
 __PRETTY_FUNCTION__))
       "Type unsupported without paired vector support")(static_cast <bool> ((VT != MVT::v256i1 || Subtarget.pairedVectorMemops
()) && "Type unsupported without paired vector support"
) ? void (0) : __assert_fail ("(VT != MVT::v256i1 || Subtarget.pairedVectorMemops()) && \"Type unsupported without paired vector support\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11256, __extension__
 __PRETTY_FUNCTION__));
Align Alignment = LN->getAlign();
SmallVector<SDValue, 4> Loads;
SmallVector<SDValue, 4> LoadChains;
unsigned NumVecs = VT.getSizeInBits() / 128;
for (unsigned Idx = 0; Idx < NumVecs; ++Idx) {
  SDValue Load =
      DAG.getLoad(MVT::v16i8, dl, LoadChain, BasePtr,
                  LN->getPointerInfo().getWithOffset(Idx * 16),
                  commonAlignment(Alignment, Idx * 16),
                  LN->getMemOperand()->getFlags(), LN->getAAInfo());
  BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
                        DAG.getConstant(16, dl, BasePtr.getValueType()));
  Loads.push_back(Load);
  LoadChains.push_back(Load.getValue(1));
}
if (Subtarget.isLittleEndian()) {
  std::reverse(Loads.begin(), Loads.end());
  std::reverse(LoadChains.begin(), LoadChains.end());
}
SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, LoadChains);
SDValue Value =
    DAG.getNode(VT == MVT::v512i1 ? PPCISD::ACC_BUILD : PPCISD::PAIR_BUILD,
                dl, VT, Loads);
SDValue RetOps[] = {Value, TF};
return DAG.getMergeValues(RetOps, dl);
11282}

11284SDValue PPCTargetLowering::LowerVectorStore(SDValue Op,
                                          SelectionDAG &DAG) const {
SDLoc dl(Op);
StoreSDNode *SN = cast<StoreSDNode>(Op.getNode());
SDValue StoreChain = SN->getChain();
SDValue BasePtr = SN->getBasePtr();
SDValue Value = SN->getValue();
SDValue Value2 = SN->getValue();
EVT StoreVT = Value.getValueType();

if (StoreVT != MVT::v256i1 && StoreVT != MVT::v512i1)
  return Op;

// Type v256i1 is used for pairs and v512i1 is used for accumulators.
// Here we create 2 or 4 v16i8 stores to store the pair or accumulator
// underlying registers individually.
assert((StoreVT != MVT::v512i1 || Subtarget.hasMMA()) &&(static_cast <bool> ((StoreVT != MVT::v512i1 || Subtarget
.hasMMA()) && "Type unsupported without MMA") ? void (
0) : __assert_fail ("(StoreVT != MVT::v512i1 || Subtarget.hasMMA()) && \"Type unsupported without MMA\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11301, __extension__
 __PRETTY_FUNCTION__))
       "Type unsupported without MMA")(static_cast <bool> ((StoreVT != MVT::v512i1 || Subtarget
.hasMMA()) && "Type unsupported without MMA") ? void (
0) : __assert_fail ("(StoreVT != MVT::v512i1 || Subtarget.hasMMA()) && \"Type unsupported without MMA\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11301, __extension__
 __PRETTY_FUNCTION__));
assert((StoreVT != MVT::v256i1 || Subtarget.pairedVectorMemops()) &&(static_cast <bool> ((StoreVT != MVT::v256i1 || Subtarget
.pairedVectorMemops()) && "Type unsupported without paired vector support"
) ? void (0) : __assert_fail ("(StoreVT != MVT::v256i1 || Subtarget.pairedVectorMemops()) && \"Type unsupported without paired vector support\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11303, __extension__
 __PRETTY_FUNCTION__))
       "Type unsupported without paired vector support")(static_cast <bool> ((StoreVT != MVT::v256i1 || Subtarget
.pairedVectorMemops()) && "Type unsupported without paired vector support"
) ? void (0) : __assert_fail ("(StoreVT != MVT::v256i1 || Subtarget.pairedVectorMemops()) && \"Type unsupported without paired vector support\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11303, __extension__
 __PRETTY_FUNCTION__));
Align Alignment = SN->getAlign();
SmallVector<SDValue, 4> Stores;
unsigned NumVecs = 2;
if (StoreVT == MVT::v512i1) {
  if (Subtarget.isISAFuture()) {
    EVT ReturnTypes[] = {MVT::v256i1, MVT::v256i1};
    MachineSDNode *ExtNode = DAG.getMachineNode(
        PPC::DMXXEXTFDMR512, dl, ArrayRef(ReturnTypes, 2), Op.getOperand(1));

    Value = SDValue(ExtNode, 0);
    Value2 = SDValue(ExtNode, 1);
  } else
    Value = DAG.getNode(PPCISD::XXMFACC, dl, MVT::v512i1, Value);
  NumVecs = 4;
}
for (unsigned Idx = 0; Idx < NumVecs; ++Idx) {
  unsigned VecNum = Subtarget.isLittleEndian() ? NumVecs - 1 - Idx : Idx;
  SDValue Elt;
  if (Subtarget.isISAFuture()) {
    VecNum = Subtarget.isLittleEndian() ? 1 - (Idx % 2) : (Idx % 2);
    Elt = DAG.getNode(PPCISD::EXTRACT_VSX_REG, dl, MVT::v16i8,
                      Idx > 1 ? Value2 : Value,
                      DAG.getConstant(VecNum, dl, getPointerTy(DAG.getDataLayout())));
  } else
    Elt = DAG.getNode(PPCISD::EXTRACT_VSX_REG, dl, MVT::v16i8, Value,
                      DAG.getConstant(VecNum, dl, getPointerTy(DAG.getDataLayout())));

  SDValue Store =
      DAG.getStore(StoreChain, dl, Elt, BasePtr,
                   SN->getPointerInfo().getWithOffset(Idx * 16),
                   commonAlignment(Alignment, Idx * 16),
                   SN->getMemOperand()->getFlags(), SN->getAAInfo());
  BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
                        DAG.getConstant(16, dl, BasePtr.getValueType()));
  Stores.push_back(Store);
}
SDValue TF = DAG.getTokenFactor(dl, Stores);
return TF;
11342}

11344SDValue PPCTargetLowering::LowerMUL(SDValue Op, SelectionDAG &DAG) const {
SDLoc dl(Op);
if (Op.getValueType() == MVT::v4i32) {
  SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);

  SDValue Zero = getCanonicalConstSplat(0, 1, MVT::v4i32, DAG, dl);
  // +16 as shift amt.
  SDValue Neg16 = getCanonicalConstSplat(-16, 4, MVT::v4i32, DAG, dl);
  SDValue RHSSwap =   // = vrlw RHS, 16
    BuildIntrinsicOp(Intrinsic::ppc_altivec_vrlw, RHS, Neg16, DAG, dl);

  // Shrinkify inputs to v8i16.
  LHS = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, LHS);
  RHS = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, RHS);
  RHSSwap = DAG.getNode(ISD::BITCAST, dl, MVT::v8i16, RHSSwap);

  // Low parts multiplied together, generating 32-bit results (we ignore the
  // top parts).
  SDValue LoProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmulouh,
                                      LHS, RHS, DAG, dl, MVT::v4i32);

  SDValue HiProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmsumuhm,
                                    LHS, RHSSwap, Zero, DAG, dl, MVT::v4i32);
  // Shift the high parts up 16 bits.
  HiProd = BuildIntrinsicOp(Intrinsic::ppc_altivec_vslw, HiProd,
                            Neg16, DAG, dl);
  return DAG.getNode(ISD::ADD, dl, MVT::v4i32, LoProd, HiProd);
} else if (Op.getValueType() == MVT::v16i8) {
  SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
  bool isLittleEndian = Subtarget.isLittleEndian();

  // Multiply the even 8-bit parts, producing 16-bit sums.
  SDValue EvenParts = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmuleub,
                                         LHS, RHS, DAG, dl, MVT::v8i16);
  EvenParts = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, EvenParts);

  // Multiply the odd 8-bit parts, producing 16-bit sums.
  SDValue OddParts = BuildIntrinsicOp(Intrinsic::ppc_altivec_vmuloub,
                                        LHS, RHS, DAG, dl, MVT::v8i16);
  OddParts = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, OddParts);

  // Merge the results together.  Because vmuleub and vmuloub are
  // instructions with a big-endian bias, we must reverse the
  // element numbering and reverse the meaning of "odd" and "even"
  // when generating little endian code.
  int Ops[16];
  for (unsigned i = 0; i != 8; ++i) {
    if (isLittleEndian) {
      Ops[i*2  ] = 2*i;
      Ops[i*2+1] = 2*i+16;
    } else {
      Ops[i*2  ] = 2*i+1;
      Ops[i*2+1] = 2*i+1+16;
    }
  }
  if (isLittleEndian)
    return DAG.getVectorShuffle(MVT::v16i8, dl, OddParts, EvenParts, Ops);
  else
    return DAG.getVectorShuffle(MVT::v16i8, dl, EvenParts, OddParts, Ops);
} else {
  llvm_unreachable("Unknown mul to lower!")::llvm::llvm_unreachable_internal("Unknown mul to lower!", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 11404);
}
11406}

11408SDValue PPCTargetLowering::LowerFP_ROUND(SDValue Op, SelectionDAG &DAG) const {
bool IsStrict = Op->isStrictFPOpcode();
if (Op.getOperand(IsStrict ? 1 : 0).getValueType() == MVT::f128 &&
    !Subtarget.hasP9Vector())
  return SDValue();

return Op;
11415}

11417// Custom lowering for fpext vf32 to v2f64
11418SDValue PPCTargetLowering::LowerFP_EXTEND(SDValue Op, SelectionDAG &DAG) const {

assert(Op.getOpcode() == ISD::FP_EXTEND &&(static_cast <bool> (Op.getOpcode() == ISD::FP_EXTEND &&
 "Should only be called for ISD::FP_EXTEND") ? void (0) : __assert_fail
 ("Op.getOpcode() == ISD::FP_EXTEND && \"Should only be called for ISD::FP_EXTEND\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11421, __extension__
 __PRETTY_FUNCTION__))
       "Should only be called for ISD::FP_EXTEND")(static_cast <bool> (Op.getOpcode() == ISD::FP_EXTEND &&
 "Should only be called for ISD::FP_EXTEND") ? void (0) : __assert_fail
 ("Op.getOpcode() == ISD::FP_EXTEND && \"Should only be called for ISD::FP_EXTEND\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11421, __extension__
 __PRETTY_FUNCTION__));

// FIXME: handle extends from half precision float vectors on P9.
// We only want to custom lower an extend from v2f32 to v2f64.
if (Op.getValueType() != MVT::v2f64 ||
    Op.getOperand(0).getValueType() != MVT::v2f32)
  return SDValue();

SDLoc dl(Op);
SDValue Op0 = Op.getOperand(0);

switch (Op0.getOpcode()) {
default:
  return SDValue();
case ISD::EXTRACT_SUBVECTOR: {
  assert(Op0.getNumOperands() == 2 &&(static_cast <bool> (Op0.getNumOperands() == 2 &&
 isa<ConstantSDNode>(Op0->getOperand(1)) && "Node should have 2 operands with second one being a constant!"
) ? void (0) : __assert_fail ("Op0.getNumOperands() == 2 && isa<ConstantSDNode>(Op0->getOperand(1)) && \"Node should have 2 operands with second one being a constant!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11438, __extension__
 __PRETTY_FUNCTION__))
         isa<ConstantSDNode>(Op0->getOperand(1)) &&(static_cast <bool> (Op0.getNumOperands() == 2 &&
 isa<ConstantSDNode>(Op0->getOperand(1)) && "Node should have 2 operands with second one being a constant!"
) ? void (0) : __assert_fail ("Op0.getNumOperands() == 2 && isa<ConstantSDNode>(Op0->getOperand(1)) && \"Node should have 2 operands with second one being a constant!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11438, __extension__
 __PRETTY_FUNCTION__))
         "Node should have 2 operands with second one being a constant!")(static_cast <bool> (Op0.getNumOperands() == 2 &&
 isa<ConstantSDNode>(Op0->getOperand(1)) && "Node should have 2 operands with second one being a constant!"
) ? void (0) : __assert_fail ("Op0.getNumOperands() == 2 && isa<ConstantSDNode>(Op0->getOperand(1)) && \"Node should have 2 operands with second one being a constant!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11438, __extension__
 __PRETTY_FUNCTION__));

  if (Op0.getOperand(0).getValueType() != MVT::v4f32)
    return SDValue();

  // Custom lower is only done for high or low doubleword.
  int Idx = cast<ConstantSDNode>(Op0.getOperand(1))->getZExtValue();
  if (Idx % 2 != 0)
    return SDValue();

  // Since input is v4f32, at this point Idx is either 0 or 2.
  // Shift to get the doubleword position we want.
  int DWord = Idx >> 1;

  // High and low word positions are different on little endian.
  if (Subtarget.isLittleEndian())
    DWord ^= 0x1;

  return DAG.getNode(PPCISD::FP_EXTEND_HALF, dl, MVT::v2f64,
                     Op0.getOperand(0), DAG.getConstant(DWord, dl, MVT::i32));
}
case ISD::FADD:
case ISD::FMUL:
case ISD::FSUB: {
  SDValue NewLoad[2];
  for (unsigned i = 0, ie = Op0.getNumOperands(); i != ie; ++i) {
    // Ensure both input are loads.
    SDValue LdOp = Op0.getOperand(i);
    if (LdOp.getOpcode() != ISD::LOAD)
      return SDValue();
    // Generate new load node.
    LoadSDNode *LD = cast<LoadSDNode>(LdOp);
    SDValue LoadOps[] = {LD->getChain(), LD->getBasePtr()};
    NewLoad[i] = DAG.getMemIntrinsicNode(
        PPCISD::LD_VSX_LH, dl, DAG.getVTList(MVT::v4f32, MVT::Other), LoadOps,
        LD->getMemoryVT(), LD->getMemOperand());
  }
  SDValue NewOp =
      DAG.getNode(Op0.getOpcode(), SDLoc(Op0), MVT::v4f32, NewLoad[0],
                  NewLoad[1], Op0.getNode()->getFlags());
  return DAG.getNode(PPCISD::FP_EXTEND_HALF, dl, MVT::v2f64, NewOp,
                     DAG.getConstant(0, dl, MVT::i32));
}
case ISD::LOAD: {
  LoadSDNode *LD = cast<LoadSDNode>(Op0);
  SDValue LoadOps[] = {LD->getChain(), LD->getBasePtr()};
  SDValue NewLd = DAG.getMemIntrinsicNode(
      PPCISD::LD_VSX_LH, dl, DAG.getVTList(MVT::v4f32, MVT::Other), LoadOps,
      LD->getMemoryVT(), LD->getMemOperand());
  return DAG.getNode(PPCISD::FP_EXTEND_HALF, dl, MVT::v2f64, NewLd,
                     DAG.getConstant(0, dl, MVT::i32));
}
}
llvm_unreachable("ERROR:Should return for all cases within swtich.")::llvm::llvm_unreachable_internal("ERROR:Should return for all cases within swtich."
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11491);
11492}

11494/// LowerOperation - Provide custom lowering hooks for some operations.
11495///
11496SDValue PPCTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
switch (Op.getOpcode()) {
default: llvm_unreachable("Wasn't expecting to be able to lower this!")::llvm::llvm_unreachable_internal("Wasn't expecting to be able to lower this!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11498);
case ISD::FPOW:               return lowerPow(Op, DAG);
case ISD::FSIN:               return lowerSin(Op, DAG);
case ISD::FCOS:               return lowerCos(Op, DAG);
case ISD::FLOG:               return lowerLog(Op, DAG);
case ISD::FLOG10:             return lowerLog10(Op, DAG);
case ISD::FEXP:               return lowerExp(Op, DAG);
case ISD::ConstantPool:       return LowerConstantPool(Op, DAG);
case ISD::BlockAddress:       return LowerBlockAddress(Op, DAG);
case ISD::GlobalAddress:      return LowerGlobalAddress(Op, DAG);
case ISD::GlobalTLSAddress:   return LowerGlobalTLSAddress(Op, DAG);
case ISD::JumpTable:          return LowerJumpTable(Op, DAG);
case ISD::STRICT_FSETCC:
case ISD::STRICT_FSETCCS:
case ISD::SETCC:              return LowerSETCC(Op, DAG);
case ISD::INIT_TRAMPOLINE:    return LowerINIT_TRAMPOLINE(Op, DAG);
case ISD::ADJUST_TRAMPOLINE:  return LowerADJUST_TRAMPOLINE(Op, DAG);

case ISD::INLINEASM:
case ISD::INLINEASM_BR:       return LowerINLINEASM(Op, DAG);
// Variable argument lowering.
case ISD::VASTART:            return LowerVASTART(Op, DAG);
case ISD::VAARG:              return LowerVAARG(Op, DAG);
case ISD::VACOPY:             return LowerVACOPY(Op, DAG);

case ISD::STACKRESTORE:       return LowerSTACKRESTORE(Op, DAG);
case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
case ISD::GET_DYNAMIC_AREA_OFFSET:
  return LowerGET_DYNAMIC_AREA_OFFSET(Op, DAG);

// Exception handling lowering.
case ISD::EH_DWARF_CFA:       return LowerEH_DWARF_CFA(Op, DAG);
case ISD::EH_SJLJ_SETJMP:     return lowerEH_SJLJ_SETJMP(Op, DAG);
case ISD::EH_SJLJ_LONGJMP:    return lowerEH_SJLJ_LONGJMP(Op, DAG);

case ISD::LOAD:               return LowerLOAD(Op, DAG);
case ISD::STORE:              return LowerSTORE(Op, DAG);
case ISD::TRUNCATE:           return LowerTRUNCATE(Op, DAG);
case ISD::SELECT_CC:          return LowerSELECT_CC(Op, DAG);
case ISD::STRICT_FP_TO_UINT:
case ISD::STRICT_FP_TO_SINT:
case ISD::FP_TO_UINT:
case ISD::FP_TO_SINT:         return LowerFP_TO_INT(Op, DAG, SDLoc(Op));
case ISD::STRICT_UINT_TO_FP:
case ISD::STRICT_SINT_TO_FP:
case ISD::UINT_TO_FP:
case ISD::SINT_TO_FP:         return LowerINT_TO_FP(Op, DAG);
case ISD::GET_ROUNDING:       return LowerGET_ROUNDING(Op, DAG);

// Lower 64-bit shifts.
case ISD::SHL_PARTS:          return LowerSHL_PARTS(Op, DAG);
case ISD::SRL_PARTS:          return LowerSRL_PARTS(Op, DAG);
case ISD::SRA_PARTS:          return LowerSRA_PARTS(Op, DAG);

case ISD::FSHL:               return LowerFunnelShift(Op, DAG);
case ISD::FSHR:               return LowerFunnelShift(Op, DAG);

// Vector-related lowering.
case ISD::BUILD_VECTOR:       return LowerBUILD_VECTOR(Op, DAG);
case ISD::VECTOR_SHUFFLE:     return LowerVECTOR_SHUFFLE(Op, DAG);
case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
case ISD::SCALAR_TO_VECTOR:   return LowerSCALAR_TO_VECTOR(Op, DAG);
case ISD::INSERT_VECTOR_ELT:  return LowerINSERT_VECTOR_ELT(Op, DAG);
case ISD::MUL:                return LowerMUL(Op, DAG);
case ISD::FP_EXTEND:          return LowerFP_EXTEND(Op, DAG);
case ISD::STRICT_FP_ROUND:
case ISD::FP_ROUND:
  return LowerFP_ROUND(Op, DAG);
case ISD::ROTL:               return LowerROTL(Op, DAG);

// For counter-based loop handling.
case ISD::INTRINSIC_W_CHAIN:  return SDValue();

case ISD::BITCAST:            return LowerBITCAST(Op, DAG);

// Frame & Return address.
case ISD::RETURNADDR:         return LowerRETURNADDR(Op, DAG);
case ISD::FRAMEADDR:          return LowerFRAMEADDR(Op, DAG);

case ISD::INTRINSIC_VOID:
  return LowerINTRINSIC_VOID(Op, DAG);
case ISD::BSWAP:
  return LowerBSWAP(Op, DAG);
case ISD::ATOMIC_CMP_SWAP:
  return LowerATOMIC_CMP_SWAP(Op, DAG);
case ISD::ATOMIC_STORE:
  return LowerATOMIC_LOAD_STORE(Op, DAG);
case ISD::IS_FPCLASS:
  return LowerIS_FPCLASS(Op, DAG);
}
11588}

11590void PPCTargetLowering::ReplaceNodeResults(SDNode *N,
                                         SmallVectorImpl<SDValue>&Results,
                                         SelectionDAG &DAG) const {
SDLoc dl(N);
switch (N->getOpcode()) {
default:
  llvm_unreachable("Do not know how to custom type legalize this operation!")::llvm::llvm_unreachable_internal("Do not know how to custom type legalize this operation!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11596);
case ISD::ATOMIC_LOAD: {
  SDValue Res = LowerATOMIC_LOAD_STORE(SDValue(N, 0), DAG);
  Results.push_back(Res);
  Results.push_back(Res.getValue(1));
  break;
}
case ISD::READCYCLECOUNTER: {
  SDVTList VTs = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
  SDValue RTB = DAG.getNode(PPCISD::READ_TIME_BASE, dl, VTs, N->getOperand(0));

  Results.push_back(
      DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, RTB, RTB.getValue(1)));
  Results.push_back(RTB.getValue(2));
  break;
}
case ISD::INTRINSIC_W_CHAIN: {
  if (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() !=
      Intrinsic::loop_decrement)
    break;

  assert(N->getValueType(0) == MVT::i1 &&(static_cast <bool> (N->getValueType(0) == MVT::i1 &&
 "Unexpected result type for CTR decrement intrinsic") ? void
 (0) : __assert_fail ("N->getValueType(0) == MVT::i1 && \"Unexpected result type for CTR decrement intrinsic\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11618, __extension__
 __PRETTY_FUNCTION__))
         "Unexpected result type for CTR decrement intrinsic")(static_cast <bool> (N->getValueType(0) == MVT::i1 &&
 "Unexpected result type for CTR decrement intrinsic") ? void
 (0) : __assert_fail ("N->getValueType(0) == MVT::i1 && \"Unexpected result type for CTR decrement intrinsic\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11618, __extension__
 __PRETTY_FUNCTION__));
  EVT SVT = getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(),
                               N->getValueType(0));
  SDVTList VTs = DAG.getVTList(SVT, MVT::Other);
  SDValue NewInt = DAG.getNode(N->getOpcode(), dl, VTs, N->getOperand(0),
                               N->getOperand(1));

  Results.push_back(DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, NewInt));
  Results.push_back(NewInt.getValue(1));
  break;
}
case ISD::INTRINSIC_WO_CHAIN: {
  switch (cast<ConstantSDNode>(N->getOperand(0))->getZExtValue()) {
  case Intrinsic::ppc_pack_longdouble:
    Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::ppcf128,
                                  N->getOperand(2), N->getOperand(1)));
    break;
  case Intrinsic::ppc_maxfe:
  case Intrinsic::ppc_minfe:
  case Intrinsic::ppc_fnmsub:
  case Intrinsic::ppc_convert_f128_to_ppcf128:
    Results.push_back(LowerINTRINSIC_WO_CHAIN(SDValue(N, 0), DAG));
    break;
  }
  break;
}
case ISD::VAARG: {
  if (!Subtarget.isSVR4ABI() || Subtarget.isPPC64())
    return;

  EVT VT = N->getValueType(0);

  if (VT == MVT::i64) {
    SDValue NewNode = LowerVAARG(SDValue(N, 1), DAG);

    Results.push_back(NewNode);
    Results.push_back(NewNode.getValue(1));
  }
  return;
}
case ISD::STRICT_FP_TO_SINT:
case ISD::STRICT_FP_TO_UINT:
case ISD::FP_TO_SINT:
case ISD::FP_TO_UINT: {
  // LowerFP_TO_INT() can only handle f32 and f64.
  if (N->getOperand(N->isStrictFPOpcode() ? 1 : 0).getValueType() ==
      MVT::ppcf128)
    return;
  SDValue LoweredValue = LowerFP_TO_INT(SDValue(N, 0), DAG, dl);
  Results.push_back(LoweredValue);
  if (N->isStrictFPOpcode())
    Results.push_back(LoweredValue.getValue(1));
  return;
}
case ISD::TRUNCATE: {
  if (!N->getValueType(0).isVector())
    return;
  SDValue Lowered = LowerTRUNCATEVector(SDValue(N, 0), DAG);
  if (Lowered)
    Results.push_back(Lowered);
  return;
}
case ISD::FSHL:
case ISD::FSHR:
  // Don't handle funnel shifts here.
  return;
case ISD::BITCAST:
  // Don't handle bitcast here.
  return;
case ISD::FP_EXTEND:
  SDValue Lowered = LowerFP_EXTEND(SDValue(N, 0), DAG);
  if (Lowered)
    Results.push_back(Lowered);
  return;
}
11693}

11695//===----------------------------------------------------------------------===//
11696//  Other Lowering Code
11697//===----------------------------------------------------------------------===//

11699static Instruction *callIntrinsic(IRBuilderBase &Builder, Intrinsic::ID Id) {
Module *M = Builder.GetInsertBlock()->getParent()->getParent();
Function *Func = Intrinsic::getDeclaration(M, Id);
return Builder.CreateCall(Func, {});
11703}

11705// The mappings for emitLeading/TrailingFence is taken from
11706// http://www.cl.cam.ac.uk/~pes20/cpp/cpp0xmappings.html
11707Instruction *PPCTargetLowering::emitLeadingFence(IRBuilderBase &Builder,
                                               Instruction *Inst,
                                               AtomicOrdering Ord) const {
if (Ord == AtomicOrdering::SequentiallyConsistent)
  return callIntrinsic(Builder, Intrinsic::ppc_sync);
if (isReleaseOrStronger(Ord))
  return callIntrinsic(Builder, Intrinsic::ppc_lwsync);
return nullptr;
11715}

11717Instruction *PPCTargetLowering::emitTrailingFence(IRBuilderBase &Builder,
                                                Instruction *Inst,
                                                AtomicOrdering Ord) const {
if (Inst->hasAtomicLoad() && isAcquireOrStronger(Ord)) {
  // See http://www.cl.cam.ac.uk/~pes20/cpp/cpp0xmappings.html and
  // http://www.rdrop.com/users/paulmck/scalability/paper/N2745r.2011.03.04a.html
  // and http://www.cl.cam.ac.uk/~pes20/cppppc/ for justification.
  if (isa<LoadInst>(Inst) && Subtarget.isPPC64())
    return Builder.CreateCall(
        Intrinsic::getDeclaration(
            Builder.GetInsertBlock()->getParent()->getParent(),
            Intrinsic::ppc_cfence, {Inst->getType()}),
        {Inst});
  // FIXME: Can use isync for rmw operation.
  return callIntrinsic(Builder, Intrinsic::ppc_lwsync);
}
return nullptr;
11734}

11736MachineBasicBlock *
11737PPCTargetLowering::EmitAtomicBinary(MachineInstr &MI, MachineBasicBlock *BB,
                                  unsigned AtomicSize,
                                  unsigned BinOpcode,
                                  unsigned CmpOpcode,
                                  unsigned CmpPred) const {
// This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
const TargetInstrInfo *TII = Subtarget.getInstrInfo();

auto LoadMnemonic = PPC::LDARX;
auto StoreMnemonic = PPC::STDCX;
switch (AtomicSize) {
default:
  llvm_unreachable("Unexpected size of atomic entity")::llvm::llvm_unreachable_internal("Unexpected size of atomic entity"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11749);
case 1:
  LoadMnemonic = PPC::LBARX;
  StoreMnemonic = PPC::STBCX;
  assert(Subtarget.hasPartwordAtomics() && "Call this only with size >=4")(static_cast <bool> (Subtarget.hasPartwordAtomics() &&
 "Call this only with size >=4") ? void (0) : __assert_fail
 ("Subtarget.hasPartwordAtomics() && \"Call this only with size >=4\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11753, __extension__
 __PRETTY_FUNCTION__));
  break;
case 2:
  LoadMnemonic = PPC::LHARX;
  StoreMnemonic = PPC::STHCX;
  assert(Subtarget.hasPartwordAtomics() && "Call this only with size >=4")(static_cast <bool> (Subtarget.hasPartwordAtomics() &&
 "Call this only with size >=4") ? void (0) : __assert_fail
 ("Subtarget.hasPartwordAtomics() && \"Call this only with size >=4\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 11758, __extension__
 __PRETTY_FUNCTION__));
  break;
case 4:
  LoadMnemonic = PPC::LWARX;
  StoreMnemonic = PPC::STWCX;
  break;
case 8:
  LoadMnemonic = PPC::LDARX;
  StoreMnemonic = PPC::STDCX;
  break;
}

const BasicBlock *LLVM_BB = BB->getBasicBlock();
MachineFunction *F = BB->getParent();
MachineFunction::iterator It = ++BB->getIterator();

Register dest = MI.getOperand(0).getReg();
Register ptrA = MI.getOperand(1).getReg();
Register ptrB = MI.getOperand(2).getReg();
Register incr = MI.getOperand(3).getReg();
DebugLoc dl = MI.getDebugLoc();

MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *loop2MBB =
  CmpOpcode ? F->CreateMachineBasicBlock(LLVM_BB) : nullptr;
MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
F->insert(It, loopMBB);
if (CmpOpcode)
  F->insert(It, loop2MBB);
F->insert(It, exitMBB);
exitMBB->splice(exitMBB->begin(), BB,
                std::next(MachineBasicBlock::iterator(MI)), BB->end());
exitMBB->transferSuccessorsAndUpdatePHIs(BB);

MachineRegisterInfo &RegInfo = F->getRegInfo();
Register TmpReg = (!BinOpcode) ? incr :
  RegInfo.createVirtualRegister( AtomicSize == 8 ? &PPC::G8RCRegClass
                                         : &PPC::GPRCRegClass);

//  thisMBB:
//   ...
//   fallthrough --> loopMBB
BB->addSuccessor(loopMBB);

//  loopMBB:
//   l[wd]arx dest, ptr
//   add r0, dest, incr
//   st[wd]cx. r0, ptr
//   bne- loopMBB
//   fallthrough --> exitMBB

// For max/min...
//  loopMBB:
//   l[wd]arx dest, ptr
//   cmpl?[wd] dest, incr
//   bgt exitMBB
//  loop2MBB:
//   st[wd]cx. dest, ptr
//   bne- loopMBB
//   fallthrough --> exitMBB

BB = loopMBB;
BuildMI(BB, dl, TII->get(LoadMnemonic), dest)
  .addReg(ptrA).addReg(ptrB);
if (BinOpcode)
  BuildMI(BB, dl, TII->get(BinOpcode), TmpReg).addReg(incr).addReg(dest);
if (CmpOpcode) {
  Register CrReg = RegInfo.createVirtualRegister(&PPC::CRRCRegClass);
  // Signed comparisons of byte or halfword values must be sign-extended.
  if (CmpOpcode == PPC::CMPW && AtomicSize < 4) {
    Register ExtReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
    BuildMI(BB, dl, TII->get(AtomicSize == 1 ? PPC::EXTSB : PPC::EXTSH),
            ExtReg).addReg(dest);
    BuildMI(BB, dl, TII->get(CmpOpcode), CrReg).addReg(ExtReg).addReg(incr);
  } else
    BuildMI(BB, dl, TII->get(CmpOpcode), CrReg).addReg(dest).addReg(incr);

  BuildMI(BB, dl, TII->get(PPC::BCC))
      .addImm(CmpPred)
      .addReg(CrReg)
      .addMBB(exitMBB);
  BB->addSuccessor(loop2MBB);
  BB->addSuccessor(exitMBB);
  BB = loop2MBB;
}
BuildMI(BB, dl, TII->get(StoreMnemonic))
  .addReg(TmpReg).addReg(ptrA).addReg(ptrB);
BuildMI(BB, dl, TII->get(PPC::BCC))
  .addImm(PPC::PRED_NE).addReg(PPC::CR0).addMBB(loopMBB);
BB->addSuccessor(loopMBB);
BB->addSuccessor(exitMBB);

//  exitMBB:
//   ...
BB = exitMBB;
return BB;
11854}

11856static bool isSignExtended(MachineInstr &MI, const PPCInstrInfo *TII) {
switch(MI.getOpcode()) {
default:
  return false;
case PPC::COPY:
  return TII->isSignExtended(MI.getOperand(1).getReg(),
                             &MI.getMF()->getRegInfo());
case PPC::LHA:
case PPC::LHA8:
case PPC::LHAU:
case PPC::LHAU8:
case PPC::LHAUX:
case PPC::LHAUX8:
case PPC::LHAX:
case PPC::LHAX8:
case PPC::LWA:
case PPC::LWAUX:
case PPC::LWAX:
case PPC::LWAX_32:
case PPC::LWA_32:
case PPC::PLHA:
case PPC::PLHA8:
case PPC::PLHA8pc:
case PPC::PLHApc:
case PPC::PLWA:
case PPC::PLWA8:
case PPC::PLWA8pc:
case PPC::PLWApc:
case PPC::EXTSB:
case PPC::EXTSB8:
case PPC::EXTSB8_32_64:
case PPC::EXTSB8_rec:
case PPC::EXTSB_rec:
case PPC::EXTSH:
case PPC::EXTSH8:
case PPC::EXTSH8_32_64:
case PPC::EXTSH8_rec:
case PPC::EXTSH_rec:
case PPC::EXTSW:
case PPC::EXTSWSLI:
case PPC::EXTSWSLI_32_64:
case PPC::EXTSWSLI_32_64_rec:
case PPC::EXTSWSLI_rec:
case PPC::EXTSW_32:
case PPC::EXTSW_32_64:
case PPC::EXTSW_32_64_rec:
case PPC::EXTSW_rec:
case PPC::SRAW:
case PPC::SRAWI:
case PPC::SRAWI_rec:
case PPC::SRAW_rec:
  return true;
}
return false;
11910}

11912MachineBasicBlock *PPCTargetLowering::EmitPartwordAtomicBinary(
  MachineInstr &MI, MachineBasicBlock *BB,
  bool is8bit, // operation
  unsigned BinOpcode, unsigned CmpOpcode, unsigned CmpPred) const {
// This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
const PPCInstrInfo *TII = Subtarget.getInstrInfo();

// If this is a signed comparison and the value being compared is not known
// to be sign extended, sign extend it here.
DebugLoc dl = MI.getDebugLoc();
MachineFunction *F = BB->getParent();
MachineRegisterInfo &RegInfo = F->getRegInfo();
Register incr = MI.getOperand(3).getReg();
bool IsSignExtended =
    incr.isVirtual() && isSignExtended(*RegInfo.getVRegDef(incr), TII);

if (CmpOpcode == PPC::CMPW && !IsSignExtended) {
  Register ValueReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
  BuildMI(*BB, MI, dl, TII->get(is8bit ? PPC::EXTSB : PPC::EXTSH), ValueReg)
      .addReg(MI.getOperand(3).getReg());
  MI.getOperand(3).setReg(ValueReg);
  incr = ValueReg;
}
// If we support part-word atomic mnemonics, just use them
if (Subtarget.hasPartwordAtomics())
  return EmitAtomicBinary(MI, BB, is8bit ? 1 : 2, BinOpcode, CmpOpcode,
                          CmpPred);

// In 64 bit mode we have to use 64 bits for addresses, even though the
// lwarx/stwcx are 32 bits.  With the 32-bit atomics we can use address
// registers without caring whether they're 32 or 64, but here we're
// doing actual arithmetic on the addresses.
bool is64bit = Subtarget.isPPC64();
bool isLittleEndian = Subtarget.isLittleEndian();
unsigned ZeroReg = is64bit ? PPC::ZERO8 : PPC::ZERO;

const BasicBlock *LLVM_BB = BB->getBasicBlock();
MachineFunction::iterator It = ++BB->getIterator();

Register dest = MI.getOperand(0).getReg();
Register ptrA = MI.getOperand(1).getReg();
Register ptrB = MI.getOperand(2).getReg();

MachineBasicBlock *loopMBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *loop2MBB =
    CmpOpcode ? F->CreateMachineBasicBlock(LLVM_BB) : nullptr;
MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
F->insert(It, loopMBB);
if (CmpOpcode)
  F->insert(It, loop2MBB);
F->insert(It, exitMBB);
exitMBB->splice(exitMBB->begin(), BB,
                std::next(MachineBasicBlock::iterator(MI)), BB->end());
exitMBB->transferSuccessorsAndUpdatePHIs(BB);

const TargetRegisterClass *RC =
    is64bit ? &PPC::G8RCRegClass : &PPC::GPRCRegClass;
const TargetRegisterClass *GPRC = &PPC::GPRCRegClass;

Register PtrReg = RegInfo.createVirtualRegister(RC);
Register Shift1Reg = RegInfo.createVirtualRegister(GPRC);
Register ShiftReg =
    isLittleEndian ? Shift1Reg : RegInfo.createVirtualRegister(GPRC);
Register Incr2Reg = RegInfo.createVirtualRegister(GPRC);
Register MaskReg = RegInfo.createVirtualRegister(GPRC);
Register Mask2Reg = RegInfo.createVirtualRegister(GPRC);
Register Mask3Reg = RegInfo.createVirtualRegister(GPRC);
Register Tmp2Reg = RegInfo.createVirtualRegister(GPRC);
Register Tmp3Reg = RegInfo.createVirtualRegister(GPRC);
Register Tmp4Reg = RegInfo.createVirtualRegister(GPRC);
Register TmpDestReg = RegInfo.createVirtualRegister(GPRC);
Register SrwDestReg = RegInfo.createVirtualRegister(GPRC);
Register Ptr1Reg;
Register TmpReg =
    (!BinOpcode) ? Incr2Reg : RegInfo.createVirtualRegister(GPRC);

//  thisMBB:
//   ...
//   fallthrough --> loopMBB
BB->addSuccessor(loopMBB);

// The 4-byte load must be aligned, while a char or short may be
// anywhere in the word.  Hence all this nasty bookkeeping code.
//   add ptr1, ptrA, ptrB [copy if ptrA==0]
//   rlwinm shift1, ptr1, 3, 27, 28 [3, 27, 27]
//   xori shift, shift1, 24 [16]
//   rlwinm ptr, ptr1, 0, 0, 29
//   slw incr2, incr, shift
//   li mask2, 255 [li mask3, 0; ori mask2, mask3, 65535]
//   slw mask, mask2, shift
//  loopMBB:
//   lwarx tmpDest, ptr
//   add tmp, tmpDest, incr2
//   andc tmp2, tmpDest, mask
//   and tmp3, tmp, mask
//   or tmp4, tmp3, tmp2
//   stwcx. tmp4, ptr
//   bne- loopMBB
//   fallthrough --> exitMBB
//   srw SrwDest, tmpDest, shift
//   rlwinm SrwDest, SrwDest, 0, 24 [16], 31
if (ptrA != ZeroReg) {
  Ptr1Reg = RegInfo.createVirtualRegister(RC);
  BuildMI(BB, dl, TII->get(is64bit ? PPC::ADD8 : PPC::ADD4), Ptr1Reg)
      .addReg(ptrA)
      .addReg(ptrB);
} else {
  Ptr1Reg = ptrB;
}
// We need use 32-bit subregister to avoid mismatch register class in 64-bit
// mode.
BuildMI(BB, dl, TII->get(PPC::RLWINM), Shift1Reg)
    .addReg(Ptr1Reg, 0, is64bit ? PPC::sub_32 : 0)
    .addImm(3)
    .addImm(27)
    .addImm(is8bit ? 28 : 27);
if (!isLittleEndian)
  BuildMI(BB, dl, TII->get(PPC::XORI), ShiftReg)
      .addReg(Shift1Reg)
      .addImm(is8bit ? 24 : 16);
if (is64bit)
  BuildMI(BB, dl, TII->get(PPC::RLDICR), PtrReg)
      .addReg(Ptr1Reg)
      .addImm(0)
      .addImm(61);
else
  BuildMI(BB, dl, TII->get(PPC::RLWINM), PtrReg)
      .addReg(Ptr1Reg)
      .addImm(0)
      .addImm(0)
      .addImm(29);
BuildMI(BB, dl, TII->get(PPC::SLW), Incr2Reg).addReg(incr).addReg(ShiftReg);
if (is8bit)
  BuildMI(BB, dl, TII->get(PPC::LI), Mask2Reg).addImm(255);
else {
  BuildMI(BB, dl, TII->get(PPC::LI), Mask3Reg).addImm(0);
  BuildMI(BB, dl, TII->get(PPC::ORI), Mask2Reg)
      .addReg(Mask3Reg)
      .addImm(65535);
}
BuildMI(BB, dl, TII->get(PPC::SLW), MaskReg)
    .addReg(Mask2Reg)
    .addReg(ShiftReg);

BB = loopMBB;
BuildMI(BB, dl, TII->get(PPC::LWARX), TmpDestReg)
    .addReg(ZeroReg)
    .addReg(PtrReg);
if (BinOpcode)
  BuildMI(BB, dl, TII->get(BinOpcode), TmpReg)
      .addReg(Incr2Reg)
      .addReg(TmpDestReg);
BuildMI(BB, dl, TII->get(PPC::ANDC), Tmp2Reg)
    .addReg(TmpDestReg)
    .addReg(MaskReg);
BuildMI(BB, dl, TII->get(PPC::AND), Tmp3Reg).addReg(TmpReg).addReg(MaskReg);
if (CmpOpcode) {
  // For unsigned comparisons, we can directly compare the shifted values.
  // For signed comparisons we shift and sign extend.
  Register SReg = RegInfo.createVirtualRegister(GPRC);
  Register CrReg = RegInfo.createVirtualRegister(&PPC::CRRCRegClass);
  BuildMI(BB, dl, TII->get(PPC::AND), SReg)
      .addReg(TmpDestReg)
      .addReg(MaskReg);
  unsigned ValueReg = SReg;
  unsigned CmpReg = Incr2Reg;
  if (CmpOpcode == PPC::CMPW) {
    ValueReg = RegInfo.createVirtualRegister(GPRC);
    BuildMI(BB, dl, TII->get(PPC::SRW), ValueReg)
        .addReg(SReg)
        .addReg(ShiftReg);
    Register ValueSReg = RegInfo.createVirtualRegister(GPRC);
    BuildMI(BB, dl, TII->get(is8bit ? PPC::EXTSB : PPC::EXTSH), ValueSReg)
        .addReg(ValueReg);
    ValueReg = ValueSReg;
    CmpReg = incr;
  }
  BuildMI(BB, dl, TII->get(CmpOpcode), CrReg).addReg(ValueReg).addReg(CmpReg);
  BuildMI(BB, dl, TII->get(PPC::BCC))
      .addImm(CmpPred)
      .addReg(CrReg)
      .addMBB(exitMBB);
  BB->addSuccessor(loop2MBB);
  BB->addSuccessor(exitMBB);
  BB = loop2MBB;
}
BuildMI(BB, dl, TII->get(PPC::OR), Tmp4Reg).addReg(Tmp3Reg).addReg(Tmp2Reg);
BuildMI(BB, dl, TII->get(PPC::STWCX))
    .addReg(Tmp4Reg)
    .addReg(ZeroReg)
    .addReg(PtrReg);
BuildMI(BB, dl, TII->get(PPC::BCC))
    .addImm(PPC::PRED_NE)
    .addReg(PPC::CR0)
    .addMBB(loopMBB);
BB->addSuccessor(loopMBB);
BB->addSuccessor(exitMBB);

//  exitMBB:
//   ...
BB = exitMBB;
// Since the shift amount is not a constant, we need to clear
// the upper bits with a separate RLWINM.
BuildMI(*BB, BB->begin(), dl, TII->get(PPC::RLWINM), dest)
    .addReg(SrwDestReg)
    .addImm(0)
    .addImm(is8bit ? 24 : 16)
    .addImm(31);
BuildMI(*BB, BB->begin(), dl, TII->get(PPC::SRW), SrwDestReg)
    .addReg(TmpDestReg)
    .addReg(ShiftReg);
return BB;
12124}

12126llvm::MachineBasicBlock *
12127PPCTargetLowering::emitEHSjLjSetJmp(MachineInstr &MI,
                                  MachineBasicBlock *MBB) const {
DebugLoc DL = MI.getDebugLoc();
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
const PPCRegisterInfo *TRI = Subtarget.getRegisterInfo();

MachineFunction *MF = MBB->getParent();
MachineRegisterInfo &MRI = MF->getRegInfo();

const BasicBlock *BB = MBB->getBasicBlock();
MachineFunction::iterator I = ++MBB->getIterator();

Register DstReg = MI.getOperand(0).getReg();
const TargetRegisterClass *RC = MRI.getRegClass(DstReg);
assert(TRI->isTypeLegalForClass(*RC, MVT::i32) && "Invalid destination!")(static_cast <bool> (TRI->isTypeLegalForClass(*RC, MVT
::i32) && "Invalid destination!") ? void (0) : __assert_fail
 ("TRI->isTypeLegalForClass(*RC, MVT::i32) && \"Invalid destination!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12141, __extension__
 __PRETTY_FUNCTION__));
Register mainDstReg = MRI.createVirtualRegister(RC);
Register restoreDstReg = MRI.createVirtualRegister(RC);

MVT PVT = getPointerTy(MF->getDataLayout());
assert((PVT == MVT::i64 || PVT == MVT::i32) &&(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32
) && "Invalid Pointer Size!") ? void (0) : __assert_fail
 ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12147, __extension__
 __PRETTY_FUNCTION__))
       "Invalid Pointer Size!")(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32
) && "Invalid Pointer Size!") ? void (0) : __assert_fail
 ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12147, __extension__
 __PRETTY_FUNCTION__));
// For v = setjmp(buf), we generate
//
// thisMBB:
//  SjLjSetup mainMBB
//  bl mainMBB
//  v_restore = 1
//  b sinkMBB
//
// mainMBB:
//  buf[LabelOffset] = LR
//  v_main = 0
//
// sinkMBB:
//  v = phi(main, restore)
//

MachineBasicBlock *thisMBB = MBB;
MachineBasicBlock *mainMBB = MF->CreateMachineBasicBlock(BB);
MachineBasicBlock *sinkMBB = MF->CreateMachineBasicBlock(BB);
MF->insert(I, mainMBB);
MF->insert(I, sinkMBB);

MachineInstrBuilder MIB;

// Transfer the remainder of BB and its successor edges to sinkMBB.
sinkMBB->splice(sinkMBB->begin(), MBB,
                std::next(MachineBasicBlock::iterator(MI)), MBB->end());
sinkMBB->transferSuccessorsAndUpdatePHIs(MBB);

// Note that the structure of the jmp_buf used here is not compatible
// with that used by libc, and is not designed to be. Specifically, it
// stores only those 'reserved' registers that LLVM does not otherwise
// understand how to spill. Also, by convention, by the time this
// intrinsic is called, Clang has already stored the frame address in the
// first slot of the buffer and stack address in the third. Following the
// X86 target code, we'll store the jump address in the second slot. We also
// need to save the TOC pointer (R2) to handle jumps between shared
// libraries, and that will be stored in the fourth slot. The thread
// identifier (R13) is not affected.

// thisMBB:
const int64_t LabelOffset = 1 * PVT.getStoreSize();
const int64_t TOCOffset   = 3 * PVT.getStoreSize();
const int64_t BPOffset    = 4 * PVT.getStoreSize();

// Prepare IP either in reg.
const TargetRegisterClass *PtrRC = getRegClassFor(PVT);
Register LabelReg = MRI.createVirtualRegister(PtrRC);
Register BufReg = MI.getOperand(1).getReg();

if (Subtarget.is64BitELFABI()) {
  setUsesTOCBasePtr(*MBB->getParent());
  MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::STD))
            .addReg(PPC::X2)
            .addImm(TOCOffset)
            .addReg(BufReg)
            .cloneMemRefs(MI);
}

// Naked functions never have a base pointer, and so we use r1. For all
// other functions, this decision must be delayed until during PEI.
unsigned BaseReg;
if (MF->getFunction().hasFnAttribute(Attribute::Naked))
  BaseReg = Subtarget.isPPC64() ? PPC::X1 : PPC::R1;
else
  BaseReg = Subtarget.isPPC64() ? PPC::BP8 : PPC::BP;

MIB = BuildMI(*thisMBB, MI, DL,
              TII->get(Subtarget.isPPC64() ? PPC::STD : PPC::STW))
          .addReg(BaseReg)
          .addImm(BPOffset)
          .addReg(BufReg)
          .cloneMemRefs(MI);

// Setup
MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::BCLalways)).addMBB(mainMBB);
MIB.addRegMask(TRI->getNoPreservedMask());

BuildMI(*thisMBB, MI, DL, TII->get(PPC::LI), restoreDstReg).addImm(1);

MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::EH_SjLj_Setup))
        .addMBB(mainMBB);
MIB = BuildMI(*thisMBB, MI, DL, TII->get(PPC::B)).addMBB(sinkMBB);

thisMBB->addSuccessor(mainMBB, BranchProbability::getZero());
thisMBB->addSuccessor(sinkMBB, BranchProbability::getOne());

// mainMBB:
//  mainDstReg = 0
MIB =
    BuildMI(mainMBB, DL,
            TII->get(Subtarget.isPPC64() ? PPC::MFLR8 : PPC::MFLR), LabelReg);

// Store IP
if (Subtarget.isPPC64()) {
  MIB = BuildMI(mainMBB, DL, TII->get(PPC::STD))
          .addReg(LabelReg)
          .addImm(LabelOffset)
          .addReg(BufReg);
} else {
  MIB = BuildMI(mainMBB, DL, TII->get(PPC::STW))
          .addReg(LabelReg)
          .addImm(LabelOffset)
          .addReg(BufReg);
}
MIB.cloneMemRefs(MI);

BuildMI(mainMBB, DL, TII->get(PPC::LI), mainDstReg).addImm(0);
mainMBB->addSuccessor(sinkMBB);

// sinkMBB:
BuildMI(*sinkMBB, sinkMBB->begin(), DL,
        TII->get(PPC::PHI), DstReg)
  .addReg(mainDstReg).addMBB(mainMBB)
  .addReg(restoreDstReg).addMBB(thisMBB);

MI.eraseFromParent();
return sinkMBB;
12266}

12268MachineBasicBlock *
12269PPCTargetLowering::emitEHSjLjLongJmp(MachineInstr &MI,
                                   MachineBasicBlock *MBB) const {
DebugLoc DL = MI.getDebugLoc();
const TargetInstrInfo *TII = Subtarget.getInstrInfo();

MachineFunction *MF = MBB->getParent();
MachineRegisterInfo &MRI = MF->getRegInfo();

MVT PVT = getPointerTy(MF->getDataLayout());
assert((PVT == MVT::i64 || PVT == MVT::i32) &&(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32
) && "Invalid Pointer Size!") ? void (0) : __assert_fail
 ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12279, __extension__
 __PRETTY_FUNCTION__))
       "Invalid Pointer Size!")(static_cast <bool> ((PVT == MVT::i64 || PVT == MVT::i32
) && "Invalid Pointer Size!") ? void (0) : __assert_fail
 ("(PVT == MVT::i64 || PVT == MVT::i32) && \"Invalid Pointer Size!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12279, __extension__
 __PRETTY_FUNCTION__));

const TargetRegisterClass *RC =
  (PVT == MVT::i64) ? &PPC::G8RCRegClass : &PPC::GPRCRegClass;
Register Tmp = MRI.createVirtualRegister(RC);
// Since FP is only updated here but NOT referenced, it's treated as GPR.
unsigned FP  = (PVT == MVT::i64) ? PPC::X31 : PPC::R31;
unsigned SP  = (PVT == MVT::i64) ? PPC::X1 : PPC::R1;
unsigned BP =
    (PVT == MVT::i64)
        ? PPC::X30
        : (Subtarget.isSVR4ABI() && isPositionIndependent() ? PPC::R29
                                                            : PPC::R30);

MachineInstrBuilder MIB;

const int64_t LabelOffset = 1 * PVT.getStoreSize();
const int64_t SPOffset    = 2 * PVT.getStoreSize();
const int64_t TOCOffset   = 3 * PVT.getStoreSize();
const int64_t BPOffset    = 4 * PVT.getStoreSize();

Register BufReg = MI.getOperand(0).getReg();

// Reload FP (the jumped-to function may not have had a
// frame pointer, and if so, then its r31 will be restored
// as necessary).
if (PVT == MVT::i64) {
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), FP)
          .addImm(0)
          .addReg(BufReg);
} else {
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), FP)
          .addImm(0)
          .addReg(BufReg);
}
MIB.cloneMemRefs(MI);

// Reload IP
if (PVT == MVT::i64) {
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), Tmp)
          .addImm(LabelOffset)
          .addReg(BufReg);
} else {
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), Tmp)
          .addImm(LabelOffset)
          .addReg(BufReg);
}
MIB.cloneMemRefs(MI);

// Reload SP
if (PVT == MVT::i64) {
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), SP)
          .addImm(SPOffset)
          .addReg(BufReg);
} else {
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), SP)
          .addImm(SPOffset)
          .addReg(BufReg);
}
MIB.cloneMemRefs(MI);

// Reload BP
if (PVT == MVT::i64) {
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), BP)
          .addImm(BPOffset)
          .addReg(BufReg);
} else {
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LWZ), BP)
          .addImm(BPOffset)
          .addReg(BufReg);
}
MIB.cloneMemRefs(MI);

// Reload TOC
if (PVT == MVT::i64 && Subtarget.isSVR4ABI()) {
  setUsesTOCBasePtr(*MBB->getParent());
  MIB = BuildMI(*MBB, MI, DL, TII->get(PPC::LD), PPC::X2)
            .addImm(TOCOffset)
            .addReg(BufReg)
            .cloneMemRefs(MI);
}

// Jump
BuildMI(*MBB, MI, DL,
        TII->get(PVT == MVT::i64 ? PPC::MTCTR8 : PPC::MTCTR)).addReg(Tmp);
BuildMI(*MBB, MI, DL, TII->get(PVT == MVT::i64 ? PPC::BCTR8 : PPC::BCTR));

MI.eraseFromParent();
return MBB;
12368}

12370bool PPCTargetLowering::hasInlineStackProbe(const MachineFunction &MF) const {
// If the function specifically requests inline stack probes, emit them.
if (MF.getFunction().hasFnAttribute("probe-stack"))
  return MF.getFunction().getFnAttribute("probe-stack").getValueAsString() ==
         "inline-asm";
return false;
12376}

12378unsigned PPCTargetLowering::getStackProbeSize(const MachineFunction &MF) const {
const TargetFrameLowering *TFI = Subtarget.getFrameLowering();
unsigned StackAlign = TFI->getStackAlignment();
assert(StackAlign >= 1 && isPowerOf2_32(StackAlign) &&(static_cast <bool> (StackAlign >= 1 && isPowerOf2_32
(StackAlign) && "Unexpected stack alignment") ? void (
0) : __assert_fail ("StackAlign >= 1 && isPowerOf2_32(StackAlign) && \"Unexpected stack alignment\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12382, __extension__
 __PRETTY_FUNCTION__))
       "Unexpected stack alignment")(static_cast <bool> (StackAlign >= 1 && isPowerOf2_32
(StackAlign) && "Unexpected stack alignment") ? void (
0) : __assert_fail ("StackAlign >= 1 && isPowerOf2_32(StackAlign) && \"Unexpected stack alignment\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12382, __extension__
 __PRETTY_FUNCTION__));
// The default stack probe size is 4096 if the function has no
// stack-probe-size attribute.
const Function &Fn = MF.getFunction();
unsigned StackProbeSize =
    Fn.getFnAttributeAsParsedInteger("stack-probe-size", 4096);
// Round down to the stack alignment.
StackProbeSize &= ~(StackAlign - 1);
return StackProbeSize ? StackProbeSize : StackAlign;
12391}

12393// Lower dynamic stack allocation with probing. `emitProbedAlloca` is splitted
12394// into three phases. In the first phase, it uses pseudo instruction
12395// PREPARE_PROBED_ALLOCA to get the future result of actual FramePointer and
12396// FinalStackPtr. In the second phase, it generates a loop for probing blocks.
12397// At last, it uses pseudo instruction DYNAREAOFFSET to get the future result of
12398// MaxCallFrameSize so that it can calculate correct data area pointer.
12399MachineBasicBlock *
12400PPCTargetLowering::emitProbedAlloca(MachineInstr &MI,
                                  MachineBasicBlock *MBB) const {
const bool isPPC64 = Subtarget.isPPC64();
MachineFunction *MF = MBB->getParent();
const TargetInstrInfo *TII = Subtarget.getInstrInfo();
DebugLoc DL = MI.getDebugLoc();
const unsigned ProbeSize = getStackProbeSize(*MF);
const BasicBlock *ProbedBB = MBB->getBasicBlock();
MachineRegisterInfo &MRI = MF->getRegInfo();
// The CFG of probing stack looks as
//         +-----+
//         | MBB |
//         +--+--+
//            |
//       +----v----+
//  +--->+ TestMBB +---+
//  |    +----+----+   |
//  |         |        |
//  |   +-----v----+   |
//  +---+ BlockMBB |   |
//      +----------+   |
//                     |
//       +---------+   |
//       | TailMBB +<--+
//       +---------+
// In MBB, calculate previous frame pointer and final stack pointer.
// In TestMBB, test if sp is equal to final stack pointer, if so, jump to
// TailMBB. In BlockMBB, update the sp atomically and jump back to TestMBB.
// TailMBB is spliced via \p MI.
MachineBasicBlock *TestMBB = MF->CreateMachineBasicBlock(ProbedBB);
MachineBasicBlock *TailMBB = MF->CreateMachineBasicBlock(ProbedBB);
MachineBasicBlock *BlockMBB = MF->CreateMachineBasicBlock(ProbedBB);

MachineFunction::iterator MBBIter = ++MBB->getIterator();
MF->insert(MBBIter, TestMBB);
MF->insert(MBBIter, BlockMBB);
MF->insert(MBBIter, TailMBB);

const TargetRegisterClass *G8RC = &PPC::G8RCRegClass;
const TargetRegisterClass *GPRC = &PPC::GPRCRegClass;

Register DstReg = MI.getOperand(0).getReg();
Register NegSizeReg = MI.getOperand(1).getReg();
Register SPReg = isPPC64 ? PPC::X1 : PPC::R1;
Register FinalStackPtr = MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);
Register FramePointer = MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);
Register ActualNegSizeReg = MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);

// Since value of NegSizeReg might be realigned in prologepilog, insert a
// PREPARE_PROBED_ALLOCA pseudo instruction to get actual FramePointer and
// NegSize.
unsigned ProbeOpc;
if (!MRI.hasOneNonDBGUse(NegSizeReg))
  ProbeOpc =
      isPPC64 ? PPC::PREPARE_PROBED_ALLOCA_64 : PPC::PREPARE_PROBED_ALLOCA_32;
else
  // By introducing PREPARE_PROBED_ALLOCA_NEGSIZE_OPT, ActualNegSizeReg
  // and NegSizeReg will be allocated in the same phyreg to avoid
  // redundant copy when NegSizeReg has only one use which is current MI and
  // will be replaced by PREPARE_PROBED_ALLOCA then.
  ProbeOpc = isPPC64 ? PPC::PREPARE_PROBED_ALLOCA_NEGSIZE_SAME_REG_64
                     : PPC::PREPARE_PROBED_ALLOCA_NEGSIZE_SAME_REG_32;
BuildMI(*MBB, {MI}, DL, TII->get(ProbeOpc), FramePointer)
    .addDef(ActualNegSizeReg)
    .addReg(NegSizeReg)
    .add(MI.getOperand(2))
    .add(MI.getOperand(3));

// Calculate final stack pointer, which equals to SP + ActualNegSize.
BuildMI(*MBB, {MI}, DL, TII->get(isPPC64 ? PPC::ADD8 : PPC::ADD4),
        FinalStackPtr)
    .addReg(SPReg)
    .addReg(ActualNegSizeReg);

// Materialize a scratch register for update.
int64_t NegProbeSize = -(int64_t)ProbeSize;
assert(isInt<32>(NegProbeSize) && "Unhandled probe size!")(static_cast <bool> (isInt<32>(NegProbeSize) &&
 "Unhandled probe size!") ? void (0) : __assert_fail ("isInt<32>(NegProbeSize) && \"Unhandled probe size!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12476, __extension__
 __PRETTY_FUNCTION__));
Register ScratchReg = MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);
if (!isInt<16>(NegProbeSize)) {
  Register TempReg = MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);
  BuildMI(*MBB, {MI}, DL, TII->get(isPPC64 ? PPC::LIS8 : PPC::LIS), TempReg)
      .addImm(NegProbeSize >> 16);
  BuildMI(*MBB, {MI}, DL, TII->get(isPPC64 ? PPC::ORI8 : PPC::ORI),
          ScratchReg)
      .addReg(TempReg)
      .addImm(NegProbeSize & 0xFFFF);
} else
  BuildMI(*MBB, {MI}, DL, TII->get(isPPC64 ? PPC::LI8 : PPC::LI), ScratchReg)
      .addImm(NegProbeSize);

{
  // Probing leading residual part.
  Register Div = MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);
  BuildMI(*MBB, {MI}, DL, TII->get(isPPC64 ? PPC::DIVD : PPC::DIVW), Div)
      .addReg(ActualNegSizeReg)
      .addReg(ScratchReg);
  Register Mul = MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);
  BuildMI(*MBB, {MI}, DL, TII->get(isPPC64 ? PPC::MULLD : PPC::MULLW), Mul)
      .addReg(Div)
      .addReg(ScratchReg);
  Register NegMod = MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);
  BuildMI(*MBB, {MI}, DL, TII->get(isPPC64 ? PPC::SUBF8 : PPC::SUBF), NegMod)
      .addReg(Mul)
      .addReg(ActualNegSizeReg);
  BuildMI(*MBB, {MI}, DL, TII->get(isPPC64 ? PPC::STDUX : PPC::STWUX), SPReg)
      .addReg(FramePointer)
      .addReg(SPReg)
      .addReg(NegMod);
}

{
  // Remaining part should be multiple of ProbeSize.
  Register CmpResult = MRI.createVirtualRegister(&PPC::CRRCRegClass);
  BuildMI(TestMBB, DL, TII->get(isPPC64 ? PPC::CMPD : PPC::CMPW), CmpResult)
      .addReg(SPReg)
      .addReg(FinalStackPtr);
  BuildMI(TestMBB, DL, TII->get(PPC::BCC))
      .addImm(PPC::PRED_EQ)
      .addReg(CmpResult)
      .addMBB(TailMBB);
  TestMBB->addSuccessor(BlockMBB);
  TestMBB->addSuccessor(TailMBB);
}

{
  // Touch the block.
  // |P...|P...|P...
  BuildMI(BlockMBB, DL, TII->get(isPPC64 ? PPC::STDUX : PPC::STWUX), SPReg)
      .addReg(FramePointer)
      .addReg(SPReg)
      .addReg(ScratchReg);
  BuildMI(BlockMBB, DL, TII->get(PPC::B)).addMBB(TestMBB);
  BlockMBB->addSuccessor(TestMBB);
}

// Calculation of MaxCallFrameSize is deferred to prologepilog, use
// DYNAREAOFFSET pseudo instruction to get the future result.
Register MaxCallFrameSizeReg =
    MRI.createVirtualRegister(isPPC64 ? G8RC : GPRC);
BuildMI(TailMBB, DL,
        TII->get(isPPC64 ? PPC::DYNAREAOFFSET8 : PPC::DYNAREAOFFSET),
        MaxCallFrameSizeReg)
    .add(MI.getOperand(2))
    .add(MI.getOperand(3));
BuildMI(TailMBB, DL, TII->get(isPPC64 ? PPC::ADD8 : PPC::ADD4), DstReg)
    .addReg(SPReg)
    .addReg(MaxCallFrameSizeReg);

// Splice instructions after MI to TailMBB.
TailMBB->splice(TailMBB->end(), MBB,
                std::next(MachineBasicBlock::iterator(MI)), MBB->end());
TailMBB->transferSuccessorsAndUpdatePHIs(MBB);
MBB->addSuccessor(TestMBB);

// Delete the pseudo instruction.
MI.eraseFromParent();

++NumDynamicAllocaProbed;
return TailMBB;
12559}

12561MachineBasicBlock *
12562PPCTargetLowering::EmitInstrWithCustomInserter(MachineInstr &MI,
                                             MachineBasicBlock *BB) const {
if (MI.getOpcode() == TargetOpcode::STACKMAP ||
    MI.getOpcode() == TargetOpcode::PATCHPOINT) {
  if (Subtarget.is64BitELFABI() &&
      MI.getOpcode() == TargetOpcode::PATCHPOINT &&
      !Subtarget.isUsingPCRelativeCalls()) {
    // Call lowering should have added an r2 operand to indicate a dependence
    // on the TOC base pointer value. It can't however, because there is no
    // way to mark the dependence as implicit there, and so the stackmap code
    // will confuse it with a regular operand. Instead, add the dependence
    // here.
    MI.addOperand(MachineOperand::CreateReg(PPC::X2, false, true));
  }

  return emitPatchPoint(MI, BB);
}

if (MI.getOpcode() == PPC::EH_SjLj_SetJmp32 ||
    MI.getOpcode() == PPC::EH_SjLj_SetJmp64) {
  return emitEHSjLjSetJmp(MI, BB);
} else if (MI.getOpcode() == PPC::EH_SjLj_LongJmp32 ||
           MI.getOpcode() == PPC::EH_SjLj_LongJmp64) {
  return emitEHSjLjLongJmp(MI, BB);
}

const TargetInstrInfo *TII = Subtarget.getInstrInfo();

// To "insert" these instructions we actually have to insert their
// control-flow patterns.
const BasicBlock *LLVM_BB = BB->getBasicBlock();
MachineFunction::iterator It = ++BB->getIterator();

MachineFunction *F = BB->getParent();
MachineRegisterInfo &MRI = F->getRegInfo();

if (MI.getOpcode() == PPC::SELECT_CC_I4 ||
    MI.getOpcode() == PPC::SELECT_CC_I8 || MI.getOpcode() == PPC::SELECT_I4 ||
    MI.getOpcode() == PPC::SELECT_I8) {
  SmallVector<MachineOperand, 2> Cond;
  if (MI.getOpcode() == PPC::SELECT_CC_I4 ||
      MI.getOpcode() == PPC::SELECT_CC_I8)
    Cond.push_back(MI.getOperand(4));
  else
    Cond.push_back(MachineOperand::CreateImm(PPC::PRED_BIT_SET));
  Cond.push_back(MI.getOperand(1));

  DebugLoc dl = MI.getDebugLoc();
  TII->insertSelect(*BB, MI, dl, MI.getOperand(0).getReg(), Cond,
                    MI.getOperand(2).getReg(), MI.getOperand(3).getReg());
} else if (MI.getOpcode() == PPC::SELECT_CC_F4 ||
           MI.getOpcode() == PPC::SELECT_CC_F8 ||
           MI.getOpcode() == PPC::SELECT_CC_F16 ||
           MI.getOpcode() == PPC::SELECT_CC_VRRC ||
           MI.getOpcode() == PPC::SELECT_CC_VSFRC ||
           MI.getOpcode() == PPC::SELECT_CC_VSSRC ||
           MI.getOpcode() == PPC::SELECT_CC_VSRC ||
           MI.getOpcode() == PPC::SELECT_CC_SPE4 ||
           MI.getOpcode() == PPC::SELECT_CC_SPE ||
           MI.getOpcode() == PPC::SELECT_F4 ||
           MI.getOpcode() == PPC::SELECT_F8 ||
           MI.getOpcode() == PPC::SELECT_F16 ||
           MI.getOpcode() == PPC::SELECT_SPE ||
           MI.getOpcode() == PPC::SELECT_SPE4 ||
           MI.getOpcode() == PPC::SELECT_VRRC ||
           MI.getOpcode() == PPC::SELECT_VSFRC ||
           MI.getOpcode() == PPC::SELECT_VSSRC ||
           MI.getOpcode() == PPC::SELECT_VSRC) {
  // The incoming instruction knows the destination vreg to set, the
  // condition code register to branch on, the true/false values to
  // select between, and a branch opcode to use.

  //  thisMBB:
  //  ...
  //   TrueVal = ...
  //   cmpTY ccX, r1, r2
  //   bCC copy1MBB
  //   fallthrough --> copy0MBB
  MachineBasicBlock *thisMBB = BB;
  MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
  MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
  DebugLoc dl = MI.getDebugLoc();
  F->insert(It, copy0MBB);
  F->insert(It, sinkMBB);

  // Transfer the remainder of BB and its successor edges to sinkMBB.
  sinkMBB->splice(sinkMBB->begin(), BB,
                  std::next(MachineBasicBlock::iterator(MI)), BB->end());
  sinkMBB->transferSuccessorsAndUpdatePHIs(BB);

  // Next, add the true and fallthrough blocks as its successors.
  BB->addSuccessor(copy0MBB);
  BB->addSuccessor(sinkMBB);

  if (MI.getOpcode() == PPC::SELECT_I4 || MI.getOpcode() == PPC::SELECT_I8 ||
      MI.getOpcode() == PPC::SELECT_F4 || MI.getOpcode() == PPC::SELECT_F8 ||
      MI.getOpcode() == PPC::SELECT_F16 ||
      MI.getOpcode() == PPC::SELECT_SPE4 ||
      MI.getOpcode() == PPC::SELECT_SPE ||
      MI.getOpcode() == PPC::SELECT_VRRC ||
      MI.getOpcode() == PPC::SELECT_VSFRC ||
      MI.getOpcode() == PPC::SELECT_VSSRC ||
      MI.getOpcode() == PPC::SELECT_VSRC) {
    BuildMI(BB, dl, TII->get(PPC::BC))
        .addReg(MI.getOperand(1).getReg())
        .addMBB(sinkMBB);
  } else {
    unsigned SelectPred = MI.getOperand(4).getImm();
    BuildMI(BB, dl, TII->get(PPC::BCC))
        .addImm(SelectPred)
        .addReg(MI.getOperand(1).getReg())
        .addMBB(sinkMBB);
  }

  //  copy0MBB:
  //   %FalseValue = ...
  //   # fallthrough to sinkMBB
  BB = copy0MBB;

  // Update machine-CFG edges
  BB->addSuccessor(sinkMBB);

  //  sinkMBB:
  //   %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
  //  ...
  BB = sinkMBB;
  BuildMI(*BB, BB->begin(), dl, TII->get(PPC::PHI), MI.getOperand(0).getReg())
      .addReg(MI.getOperand(3).getReg())
      .addMBB(copy0MBB)
      .addReg(MI.getOperand(2).getReg())
      .addMBB(thisMBB);
} else if (MI.getOpcode() == PPC::ReadTB) {
  // To read the 64-bit time-base register on a 32-bit target, we read the
  // two halves. Should the counter have wrapped while it was being read, we
  // need to try again.
  // ...
  // readLoop:
  // mfspr Rx,TBU # load from TBU
  // mfspr Ry,TB  # load from TB
  // mfspr Rz,TBU # load from TBU
  // cmpw crX,Rx,Rz # check if 'old'='new'
  // bne readLoop   # branch if they're not equal
  // ...

  MachineBasicBlock *readMBB = F->CreateMachineBasicBlock(LLVM_BB);
  MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
  DebugLoc dl = MI.getDebugLoc();
  F->insert(It, readMBB);
  F->insert(It, sinkMBB);

  // Transfer the remainder of BB and its successor edges to sinkMBB.
  sinkMBB->splice(sinkMBB->begin(), BB,
                  std::next(MachineBasicBlock::iterator(MI)), BB->end());
  sinkMBB->transferSuccessorsAndUpdatePHIs(BB);

  BB->addSuccessor(readMBB);
  BB = readMBB;

  MachineRegisterInfo &RegInfo = F->getRegInfo();
  Register ReadAgainReg = RegInfo.createVirtualRegister(&PPC::GPRCRegClass);
  Register LoReg = MI.getOperand(0).getReg();
  Register HiReg = MI.getOperand(1).getReg();

  BuildMI(BB, dl, TII->get(PPC::MFSPR), HiReg).addImm(269);
  BuildMI(BB, dl, TII->get(PPC::MFSPR), LoReg).addImm(268);
  BuildMI(BB, dl, TII->get(PPC::MFSPR), ReadAgainReg).addImm(269);

  Register CmpReg = RegInfo.createVirtualRegister(&PPC::CRRCRegClass);

  BuildMI(BB, dl, TII->get(PPC::CMPW), CmpReg)
      .addReg(HiReg)
      .addReg(ReadAgainReg);
  BuildMI(BB, dl, TII->get(PPC::BCC))
      .addImm(PPC::PRED_NE)
      .addReg(CmpReg)
      .addMBB(readMBB);

  BB->addSuccessor(readMBB);
  BB->addSuccessor(sinkMBB);
} else if (MI.getOpcode() == PPC::ATOMIC_LOAD_ADD_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::ADD4);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_ADD_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::ADD4);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_ADD_I32)
  BB = EmitAtomicBinary(MI, BB, 4, PPC::ADD4);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_ADD_I64)
  BB = EmitAtomicBinary(MI, BB, 8, PPC::ADD8);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_AND_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::AND);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_AND_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::AND);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_AND_I32)
  BB = EmitAtomicBinary(MI, BB, 4, PPC::AND);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_AND_I64)
  BB = EmitAtomicBinary(MI, BB, 8, PPC::AND8);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_OR_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::OR);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_OR_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::OR);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_OR_I32)
  BB = EmitAtomicBinary(MI, BB, 4, PPC::OR);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_OR_I64)
  BB = EmitAtomicBinary(MI, BB, 8, PPC::OR8);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_XOR_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::XOR);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_XOR_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::XOR);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_XOR_I32)
  BB = EmitAtomicBinary(MI, BB, 4, PPC::XOR);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_XOR_I64)
  BB = EmitAtomicBinary(MI, BB, 8, PPC::XOR8);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_NAND_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::NAND);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_NAND_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::NAND);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_NAND_I32)
  BB = EmitAtomicBinary(MI, BB, 4, PPC::NAND);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_NAND_I64)
  BB = EmitAtomicBinary(MI, BB, 8, PPC::NAND8);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_SUB_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, PPC::SUBF);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_SUB_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, PPC::SUBF);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_SUB_I32)
  BB = EmitAtomicBinary(MI, BB, 4, PPC::SUBF);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_SUB_I64)
  BB = EmitAtomicBinary(MI, BB, 8, PPC::SUBF8);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_MIN_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, 0, PPC::CMPW, PPC::PRED_LT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_MIN_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, 0, PPC::CMPW, PPC::PRED_LT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_MIN_I32)
  BB = EmitAtomicBinary(MI, BB, 4, 0, PPC::CMPW, PPC::PRED_LT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_MIN_I64)
  BB = EmitAtomicBinary(MI, BB, 8, 0, PPC::CMPD, PPC::PRED_LT);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_MAX_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, 0, PPC::CMPW, PPC::PRED_GT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_MAX_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, 0, PPC::CMPW, PPC::PRED_GT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_MAX_I32)
  BB = EmitAtomicBinary(MI, BB, 4, 0, PPC::CMPW, PPC::PRED_GT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_MAX_I64)
  BB = EmitAtomicBinary(MI, BB, 8, 0, PPC::CMPD, PPC::PRED_GT);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_UMIN_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, 0, PPC::CMPLW, PPC::PRED_LT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_UMIN_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, 0, PPC::CMPLW, PPC::PRED_LT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_UMIN_I32)
  BB = EmitAtomicBinary(MI, BB, 4, 0, PPC::CMPLW, PPC::PRED_LT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_UMIN_I64)
  BB = EmitAtomicBinary(MI, BB, 8, 0, PPC::CMPLD, PPC::PRED_LT);

else if (MI.getOpcode() == PPC::ATOMIC_LOAD_UMAX_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, 0, PPC::CMPLW, PPC::PRED_GT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_UMAX_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, 0, PPC::CMPLW, PPC::PRED_GT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_UMAX_I32)
  BB = EmitAtomicBinary(MI, BB, 4, 0, PPC::CMPLW, PPC::PRED_GT);
else if (MI.getOpcode() == PPC::ATOMIC_LOAD_UMAX_I64)
  BB = EmitAtomicBinary(MI, BB, 8, 0, PPC::CMPLD, PPC::PRED_GT);

else if (MI.getOpcode() == PPC::ATOMIC_SWAP_I8)
  BB = EmitPartwordAtomicBinary(MI, BB, true, 0);
else if (MI.getOpcode() == PPC::ATOMIC_SWAP_I16)
  BB = EmitPartwordAtomicBinary(MI, BB, false, 0);
else if (MI.getOpcode() == PPC::ATOMIC_SWAP_I32)
  BB = EmitAtomicBinary(MI, BB, 4, 0);
else if (MI.getOpcode() == PPC::ATOMIC_SWAP_I64)
  BB = EmitAtomicBinary(MI, BB, 8, 0);
else if (MI.getOpcode() == PPC::ATOMIC_CMP_SWAP_I32 ||
         MI.getOpcode() == PPC::ATOMIC_CMP_SWAP_I64 ||
         (Subtarget.hasPartwordAtomics() &&
          MI.getOpcode() == PPC::ATOMIC_CMP_SWAP_I8) ||
         (Subtarget.hasPartwordAtomics() &&
          MI.getOpcode() == PPC::ATOMIC_CMP_SWAP_I16)) {
  bool is64bit = MI.getOpcode() == PPC::ATOMIC_CMP_SWAP_I64;

  auto LoadMnemonic = PPC::LDARX;
  auto StoreMnemonic = PPC::STDCX;
  switch (MI.getOpcode()) {
  default:
    llvm_unreachable("Compare and swap of unknown size")::llvm::llvm_unreachable_internal("Compare and swap of unknown size"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12851);
  case PPC::ATOMIC_CMP_SWAP_I8:
    LoadMnemonic = PPC::LBARX;
    StoreMnemonic = PPC::STBCX;
    assert(Subtarget.hasPartwordAtomics() && "No support partword atomics.")(static_cast <bool> (Subtarget.hasPartwordAtomics() &&
 "No support partword atomics.") ? void (0) : __assert_fail (
"Subtarget.hasPartwordAtomics() && \"No support partword atomics.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12855, __extension__
 __PRETTY_FUNCTION__));
    break;
  case PPC::ATOMIC_CMP_SWAP_I16:
    LoadMnemonic = PPC::LHARX;
    StoreMnemonic = PPC::STHCX;
    assert(Subtarget.hasPartwordAtomics() && "No support partword atomics.")(static_cast <bool> (Subtarget.hasPartwordAtomics() &&
 "No support partword atomics.") ? void (0) : __assert_fail (
"Subtarget.hasPartwordAtomics() && \"No support partword atomics.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 12860, __extension__
 __PRETTY_FUNCTION__));
    break;
  case PPC::ATOMIC_CMP_SWAP_I32:
    LoadMnemonic = PPC::LWARX;
    StoreMnemonic = PPC::STWCX;
    break;
  case PPC::ATOMIC_CMP_SWAP_I64:
    LoadMnemonic = PPC::LDARX;
    StoreMnemonic = PPC::STDCX;
    break;
  }
  MachineRegisterInfo &RegInfo = F->getRegInfo();
  Register dest = MI.getOperand(0).getReg();
  Register ptrA = MI.getOperand(1).getReg();
  Register ptrB = MI.getOperand(2).getReg();
  Register CrReg = RegInfo.createVirtualRegister(&PPC::CRRCRegClass);
  Register oldval = MI.getOperand(3).getReg();
  Register newval = MI.getOperand(4).getReg();
  DebugLoc dl = MI.getDebugLoc();

  MachineBasicBlock *loop1MBB = F->CreateMachineBasicBlock(LLVM_BB);
  MachineBasicBlock *loop2MBB = F->CreateMachineBasicBlock(LLVM_BB);
  MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
  F->insert(It, loop1MBB);
  F->insert(It, loop2MBB);
  F->insert(It, exitMBB);
  exitMBB->splice(exitMBB->begin(), BB,
                  std::next(MachineBasicBlock::iterator(MI)), BB->end());
  exitMBB->transferSuccessorsAndUpdatePHIs(BB);

  //  thisMBB:
  //   ...
  //   fallthrough --> loopMBB
  BB->addSuccessor(loop1MBB);

  // loop1MBB:
  //   l[bhwd]arx dest, ptr
  //   cmp[wd] dest, oldval
  //   bne- exitBB
  // loop2MBB:
  //   st[bhwd]cx. newval, ptr
  //   bne- loopMBB
  //   b exitBB
  // exitBB:
  BB = loop1MBB;
  BuildMI(BB, dl, TII->get(LoadMnemonic), dest).addReg(ptrA).addReg(ptrB);
  BuildMI(BB, dl, TII->get(is64bit ? PPC::CMPD : PPC::CMPW), CrReg)
      .addReg(dest)
      .addReg(oldval);
  BuildMI(BB, dl, TII->get(PPC::BCC))
      .addImm(PPC::PRED_NE)
      .addReg(CrReg)
      .addMBB(exitMBB);
  BB->addSuccessor(loop2MBB);
  BB->addSuccessor(exitMBB);

  BB = loop2MBB;
  BuildMI(BB, dl, TII->get(StoreMnemonic))
      .addReg(newval)
      .addReg(ptrA)
      .addReg(ptrB);
  BuildMI(BB, dl, TII->get(PPC::BCC))
      .addImm(PPC::PRED_NE)
      .addReg(PPC::CR0)
      .addMBB(loop1MBB);
  BuildMI(BB, dl, TII->get(PPC::B)).addMBB(exitMBB);
  BB->addSuccessor(loop1MBB);
  BB->addSuccessor(exitMBB);

  //  exitMBB:
  //   ...
  BB = exitMBB;
} else if (MI.getOpcode() == PPC::ATOMIC_CMP_SWAP_I8 ||
           MI.getOpcode() == PPC::ATOMIC_CMP_SWAP_I16) {
  // We must use 64-bit registers for addresses when targeting 64-bit,
  // since we're actually doing arithmetic on them.  Other registers
  // can be 32-bit.
  bool is64bit = Subtarget.isPPC64();
  bool isLittleEndian = Subtarget.isLittleEndian();
  bool is8bit = MI.getOpcode() == PPC::ATOMIC_CMP_SWAP_I8;

  Register dest = MI.getOperand(0).getReg();
  Register ptrA = MI.getOperand(1).getReg();
  Register ptrB = MI.getOperand(2).getReg();
  Register oldval = MI.getOperand(3).getReg();
  Register newval = MI.getOperand(4).getReg();
  DebugLoc dl = MI.getDebugLoc();

  MachineBasicBlock *loop1MBB = F->CreateMachineBasicBlock(LLVM_BB);
  MachineBasicBlock *loop2MBB = F->CreateMachineBasicBlock(LLVM_BB);
  MachineBasicBlock *exitMBB = F->CreateMachineBasicBlock(LLVM_BB);
  F->insert(It, loop1MBB);
  F->insert(It, loop2MBB);
  F->insert(It, exitMBB);
  exitMBB->splice(exitMBB->begin(), BB,
                  std::next(MachineBasicBlock::iterator(MI)), BB->end());
  exitMBB->transferSuccessorsAndUpdatePHIs(BB);

  MachineRegisterInfo &RegInfo = F->getRegInfo();
  const TargetRegisterClass *RC =
      is64bit ? &PPC::G8RCRegClass : &PPC::GPRCRegClass;
  const TargetRegisterClass *GPRC = &PPC::GPRCRegClass;

  Register PtrReg = RegInfo.createVirtualRegister(RC);
  Register Shift1Reg = RegInfo.createVirtualRegister(GPRC);
  Register ShiftReg =
      isLittleEndian ? Shift1Reg : RegInfo.createVirtualRegister(GPRC);
  Register NewVal2Reg = RegInfo.createVirtualRegister(GPRC);
  Register NewVal3Reg = RegInfo.createVirtualRegister(GPRC);
  Register OldVal2Reg = RegInfo.createVirtualRegister(GPRC);
  Register OldVal3Reg = RegInfo.createVirtualRegister(GPRC);
  Register MaskReg = RegInfo.createVirtualRegister(GPRC);
  Register Mask2Reg = RegInfo.createVirtualRegister(GPRC);
  Register Mask3Reg = RegInfo.createVirtualRegister(GPRC);
  Register Tmp2Reg = RegInfo.createVirtualRegister(GPRC);
  Register Tmp4Reg = RegInfo.createVirtualRegister(GPRC);
  Register TmpDestReg = RegInfo.createVirtualRegister(GPRC);
  Register Ptr1Reg;
  Register TmpReg = RegInfo.createVirtualRegister(GPRC);
  Register ZeroReg = is64bit ? PPC::ZERO8 : PPC::ZERO;
  Register CrReg = RegInfo.createVirtualRegister(&PPC::CRRCRegClass);
  //  thisMBB:
  //   ...
  //   fallthrough --> loopMBB
  BB->addSuccessor(loop1MBB);

  // The 4-byte load must be aligned, while a char or short may be
  // anywhere in the word.  Hence all this nasty bookkeeping code.
  //   add ptr1, ptrA, ptrB [copy if ptrA==0]
  //   rlwinm shift1, ptr1, 3, 27, 28 [3, 27, 27]
  //   xori shift, shift1, 24 [16]
  //   rlwinm ptr, ptr1, 0, 0, 29
  //   slw newval2, newval, shift
  //   slw oldval2, oldval,shift
  //   li mask2, 255 [li mask3, 0; ori mask2, mask3, 65535]
  //   slw mask, mask2, shift
  //   and newval3, newval2, mask
  //   and oldval3, oldval2, mask
  // loop1MBB:
  //   lwarx tmpDest, ptr
  //   and tmp, tmpDest, mask
  //   cmpw tmp, oldval3
  //   bne- exitBB
  // loop2MBB:
  //   andc tmp2, tmpDest, mask
  //   or tmp4, tmp2, newval3
  //   stwcx. tmp4, ptr
  //   bne- loop1MBB
  //   b exitBB
  // exitBB:
  //   srw dest, tmpDest, shift
  if (ptrA != ZeroReg) {
    Ptr1Reg = RegInfo.createVirtualRegister(RC);
    BuildMI(BB, dl, TII->get(is64bit ? PPC::ADD8 : PPC::ADD4), Ptr1Reg)
        .addReg(ptrA)
        .addReg(ptrB);
  } else {
    Ptr1Reg = ptrB;
  }

  // We need use 32-bit subregister to avoid mismatch register class in 64-bit
  // mode.
  BuildMI(BB, dl, TII->get(PPC::RLWINM), Shift1Reg)
      .addReg(Ptr1Reg, 0, is64bit ? PPC::sub_32 : 0)
      .addImm(3)
      .addImm(27)
      .addImm(is8bit ? 28 : 27);
  if (!isLittleEndian)
    BuildMI(BB, dl, TII->get(PPC::XORI), ShiftReg)
        .addReg(Shift1Reg)
        .addImm(is8bit ? 24 : 16);
  if (is64bit)
    BuildMI(BB, dl, TII->get(PPC::RLDICR), PtrReg)
        .addReg(Ptr1Reg)
        .addImm(0)
        .addImm(61);
  else
    BuildMI(BB, dl, TII->get(PPC::RLWINM), PtrReg)
        .addReg(Ptr1Reg)
        .addImm(0)
        .addImm(0)
        .addImm(29);
  BuildMI(BB, dl, TII->get(PPC::SLW), NewVal2Reg)
      .addReg(newval)
      .addReg(ShiftReg);
  BuildMI(BB, dl, TII->get(PPC::SLW), OldVal2Reg)
      .addReg(oldval)
      .addReg(ShiftReg);
  if (is8bit)
    BuildMI(BB, dl, TII->get(PPC::LI), Mask2Reg).addImm(255);
  else {
    BuildMI(BB, dl, TII->get(PPC::LI), Mask3Reg).addImm(0);
    BuildMI(BB, dl, TII->get(PPC::ORI), Mask2Reg)
        .addReg(Mask3Reg)
        .addImm(65535);
  }
  BuildMI(BB, dl, TII->get(PPC::SLW), MaskReg)
      .addReg(Mask2Reg)
      .addReg(ShiftReg);
  BuildMI(BB, dl, TII->get(PPC::AND), NewVal3Reg)
      .addReg(NewVal2Reg)
      .addReg(MaskReg);
  BuildMI(BB, dl, TII->get(PPC::AND), OldVal3Reg)
      .addReg(OldVal2Reg)
      .addReg(MaskReg);

  BB = loop1MBB;
  BuildMI(BB, dl, TII->get(PPC::LWARX), TmpDestReg)
      .addReg(ZeroReg)
      .addReg(PtrReg);
  BuildMI(BB, dl, TII->get(PPC::AND), TmpReg)
      .addReg(TmpDestReg)
      .addReg(MaskReg);
  BuildMI(BB, dl, TII->get(PPC::CMPW), CrReg)
      .addReg(TmpReg)
      .addReg(OldVal3Reg);
  BuildMI(BB, dl, TII->get(PPC::BCC))
      .addImm(PPC::PRED_NE)
      .addReg(CrReg)
      .addMBB(exitMBB);
  BB->addSuccessor(loop2MBB);
  BB->addSuccessor(exitMBB);

  BB = loop2MBB;
  BuildMI(BB, dl, TII->get(PPC::ANDC), Tmp2Reg)
      .addReg(TmpDestReg)
      .addReg(MaskReg);
  BuildMI(BB, dl, TII->get(PPC::OR), Tmp4Reg)
      .addReg(Tmp2Reg)
      .addReg(NewVal3Reg);
  BuildMI(BB, dl, TII->get(PPC::STWCX))
      .addReg(Tmp4Reg)
      .addReg(ZeroReg)
      .addReg(PtrReg);
  BuildMI(BB, dl, TII->get(PPC::BCC))
      .addImm(PPC::PRED_NE)
      .addReg(PPC::CR0)
      .addMBB(loop1MBB);
  BuildMI(BB, dl, TII->get(PPC::B)).addMBB(exitMBB);
  BB->addSuccessor(loop1MBB);
  BB->addSuccessor(exitMBB);

  //  exitMBB:
  //   ...
  BB = exitMBB;
  BuildMI(*BB, BB->begin(), dl, TII->get(PPC::SRW), dest)
      .addReg(TmpReg)
      .addReg(ShiftReg);
} else if (MI.getOpcode() == PPC::FADDrtz) {
  // This pseudo performs an FADD with rounding mode temporarily forced
  // to round-to-zero.  We emit this via custom inserter since the FPSCR
  // is not modeled at the SelectionDAG level.
  Register Dest = MI.getOperand(0).getReg();
  Register Src1 = MI.getOperand(1).getReg();
  Register Src2 = MI.getOperand(2).getReg();
  DebugLoc dl = MI.getDebugLoc();

  MachineRegisterInfo &RegInfo = F->getRegInfo();
  Register MFFSReg = RegInfo.createVirtualRegister(&PPC::F8RCRegClass);

  // Save FPSCR value.
  BuildMI(*BB, MI, dl, TII->get(PPC::MFFS), MFFSReg);

  // Set rounding mode to round-to-zero.
  BuildMI(*BB, MI, dl, TII->get(PPC::MTFSB1))
      .addImm(31)
      .addReg(PPC::RM, RegState::ImplicitDefine);

  BuildMI(*BB, MI, dl, TII->get(PPC::MTFSB0))
      .addImm(30)
      .addReg(PPC::RM, RegState::ImplicitDefine);

  // Perform addition.
  auto MIB = BuildMI(*BB, MI, dl, TII->get(PPC::FADD), Dest)
                 .addReg(Src1)
                 .addReg(Src2);
  if (MI.getFlag(MachineInstr::NoFPExcept))
    MIB.setMIFlag(MachineInstr::NoFPExcept);

  // Restore FPSCR value.
  BuildMI(*BB, MI, dl, TII->get(PPC::MTFSFb)).addImm(1).addReg(MFFSReg);
} else if (MI.getOpcode() == PPC::ANDI_rec_1_EQ_BIT ||
           MI.getOpcode() == PPC::ANDI_rec_1_GT_BIT ||
           MI.getOpcode() == PPC::ANDI_rec_1_EQ_BIT8 ||
           MI.getOpcode() == PPC::ANDI_rec_1_GT_BIT8) {
  unsigned Opcode = (MI.getOpcode() == PPC::ANDI_rec_1_EQ_BIT8 ||
                     MI.getOpcode() == PPC::ANDI_rec_1_GT_BIT8)
                        ? PPC::ANDI8_rec
                        : PPC::ANDI_rec;
  bool IsEQ = (MI.getOpcode() == PPC::ANDI_rec_1_EQ_BIT ||
               MI.getOpcode() == PPC::ANDI_rec_1_EQ_BIT8);

  MachineRegisterInfo &RegInfo = F->getRegInfo();
  Register Dest = RegInfo.createVirtualRegister(
      Opcode == PPC::ANDI_rec ? &PPC::GPRCRegClass : &PPC::G8RCRegClass);

  DebugLoc Dl = MI.getDebugLoc();
  BuildMI(*BB, MI, Dl, TII->get(Opcode), Dest)
      .addReg(MI.getOperand(1).getReg())
      .addImm(1);
  BuildMI(*BB, MI, Dl, TII->get(TargetOpcode::COPY),
          MI.getOperand(0).getReg())
      .addReg(IsEQ ? PPC::CR0EQ : PPC::CR0GT);
} else if (MI.getOpcode() == PPC::TCHECK_RET) {
  DebugLoc Dl = MI.getDebugLoc();
  MachineRegisterInfo &RegInfo = F->getRegInfo();
  Register CRReg = RegInfo.createVirtualRegister(&PPC::CRRCRegClass);
  BuildMI(*BB, MI, Dl, TII->get(PPC::TCHECK), CRReg);
  BuildMI(*BB, MI, Dl, TII->get(TargetOpcode::COPY),
          MI.getOperand(0).getReg())
      .addReg(CRReg);
} else if (MI.getOpcode() == PPC::TBEGIN_RET) {
  DebugLoc Dl = MI.getDebugLoc();
  unsigned Imm = MI.getOperand(1).getImm();
  BuildMI(*BB, MI, Dl, TII->get(PPC::TBEGIN)).addImm(Imm);
  BuildMI(*BB, MI, Dl, TII->get(TargetOpcode::COPY),
          MI.getOperand(0).getReg())
      .addReg(PPC::CR0EQ);
} else if (MI.getOpcode() == PPC::SETRNDi) {
  DebugLoc dl = MI.getDebugLoc();
  Register OldFPSCRReg = MI.getOperand(0).getReg();

  // Save FPSCR value.
  if (MRI.use_empty(OldFPSCRReg))
    BuildMI(*BB, MI, dl, TII->get(TargetOpcode::IMPLICIT_DEF), OldFPSCRReg);
  else
    BuildMI(*BB, MI, dl, TII->get(PPC::MFFS), OldFPSCRReg);

  // The floating point rounding mode is in the bits 62:63 of FPCSR, and has
  // the following settings:
  //   00 Round to nearest
  //   01 Round to 0
  //   10 Round to +inf
  //   11 Round to -inf

  // When the operand is immediate, using the two least significant bits of
  // the immediate to set the bits 62:63 of FPSCR.
  unsigned Mode = MI.getOperand(1).getImm();
  BuildMI(*BB, MI, dl, TII->get((Mode & 1) ? PPC::MTFSB1 : PPC::MTFSB0))
      .addImm(31)
      .addReg(PPC::RM, RegState::ImplicitDefine);

  BuildMI(*BB, MI, dl, TII->get((Mode & 2) ? PPC::MTFSB1 : PPC::MTFSB0))
      .addImm(30)
      .addReg(PPC::RM, RegState::ImplicitDefine);
} else if (MI.getOpcode() == PPC::SETRND) {
  DebugLoc dl = MI.getDebugLoc();

  // Copy register from F8RCRegClass::SrcReg to G8RCRegClass::DestReg
  // or copy register from G8RCRegClass::SrcReg to F8RCRegClass::DestReg.
  // If the target doesn't have DirectMove, we should use stack to do the
  // conversion, because the target doesn't have the instructions like mtvsrd
  // or mfvsrd to do this conversion directly.
  auto copyRegFromG8RCOrF8RC = [&] (unsigned DestReg, unsigned SrcReg) {
    if (Subtarget.hasDirectMove()) {
      BuildMI(*BB, MI, dl, TII->get(TargetOpcode::COPY), DestReg)
        .addReg(SrcReg);
    } else {
      // Use stack to do the register copy.
      unsigned StoreOp = PPC::STD, LoadOp = PPC::LFD;
      MachineRegisterInfo &RegInfo = F->getRegInfo();
      const TargetRegisterClass *RC = RegInfo.getRegClass(SrcReg);
      if (RC == &PPC::F8RCRegClass) {
        // Copy register from F8RCRegClass to G8RCRegclass.
        assert((RegInfo.getRegClass(DestReg) == &PPC::G8RCRegClass) &&(static_cast <bool> ((RegInfo.getRegClass(DestReg) == &
PPC::G8RCRegClass) && "Unsupported RegClass.") ? void
 (0) : __assert_fail ("(RegInfo.getRegClass(DestReg) == &PPC::G8RCRegClass) && \"Unsupported RegClass.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13225, __extension__
 __PRETTY_FUNCTION__))
               "Unsupported RegClass.")(static_cast <bool> ((RegInfo.getRegClass(DestReg) == &
PPC::G8RCRegClass) && "Unsupported RegClass.") ? void
 (0) : __assert_fail ("(RegInfo.getRegClass(DestReg) == &PPC::G8RCRegClass) && \"Unsupported RegClass.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13225, __extension__
 __PRETTY_FUNCTION__));

        StoreOp = PPC::STFD;
        LoadOp = PPC::LD;
      } else {
        // Copy register from G8RCRegClass to F8RCRegclass.
        assert((RegInfo.getRegClass(SrcReg) == &PPC::G8RCRegClass) &&(static_cast <bool> ((RegInfo.getRegClass(SrcReg) == &
PPC::G8RCRegClass) && (RegInfo.getRegClass(DestReg) ==
 &PPC::F8RCRegClass) && "Unsupported RegClass.") ?
 void (0) : __assert_fail ("(RegInfo.getRegClass(SrcReg) == &PPC::G8RCRegClass) && (RegInfo.getRegClass(DestReg) == &PPC::F8RCRegClass) && \"Unsupported RegClass.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13233, __extension__
 __PRETTY_FUNCTION__))
               (RegInfo.getRegClass(DestReg) == &PPC::F8RCRegClass) &&(static_cast <bool> ((RegInfo.getRegClass(SrcReg) == &
PPC::G8RCRegClass) && (RegInfo.getRegClass(DestReg) ==
 &PPC::F8RCRegClass) && "Unsupported RegClass.") ?
 void (0) : __assert_fail ("(RegInfo.getRegClass(SrcReg) == &PPC::G8RCRegClass) && (RegInfo.getRegClass(DestReg) == &PPC::F8RCRegClass) && \"Unsupported RegClass.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13233, __extension__
 __PRETTY_FUNCTION__))
               "Unsupported RegClass.")(static_cast <bool> ((RegInfo.getRegClass(SrcReg) == &
PPC::G8RCRegClass) && (RegInfo.getRegClass(DestReg) ==
 &PPC::F8RCRegClass) && "Unsupported RegClass.") ?
 void (0) : __assert_fail ("(RegInfo.getRegClass(SrcReg) == &PPC::G8RCRegClass) && (RegInfo.getRegClass(DestReg) == &PPC::F8RCRegClass) && \"Unsupported RegClass.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13233, __extension__
 __PRETTY_FUNCTION__));
      }

      MachineFrameInfo &MFI = F->getFrameInfo();
      int FrameIdx = MFI.CreateStackObject(8, Align(8), false);

      MachineMemOperand *MMOStore = F->getMachineMemOperand(
          MachinePointerInfo::getFixedStack(*F, FrameIdx, 0),
          MachineMemOperand::MOStore, MFI.getObjectSize(FrameIdx),
          MFI.getObjectAlign(FrameIdx));

      // Store the SrcReg into the stack.
      BuildMI(*BB, MI, dl, TII->get(StoreOp))
        .addReg(SrcReg)
        .addImm(0)
        .addFrameIndex(FrameIdx)
        .addMemOperand(MMOStore);

      MachineMemOperand *MMOLoad = F->getMachineMemOperand(
          MachinePointerInfo::getFixedStack(*F, FrameIdx, 0),
          MachineMemOperand::MOLoad, MFI.getObjectSize(FrameIdx),
          MFI.getObjectAlign(FrameIdx));

      // Load from the stack where SrcReg is stored, and save to DestReg,
      // so we have done the RegClass conversion from RegClass::SrcReg to
      // RegClass::DestReg.
      BuildMI(*BB, MI, dl, TII->get(LoadOp), DestReg)
        .addImm(0)
        .addFrameIndex(FrameIdx)
        .addMemOperand(MMOLoad);
    }
  };

  Register OldFPSCRReg = MI.getOperand(0).getReg();

  // Save FPSCR value.
  BuildMI(*BB, MI, dl, TII->get(PPC::MFFS), OldFPSCRReg);

  // When the operand is gprc register, use two least significant bits of the
  // register and mtfsf instruction to set the bits 62:63 of FPSCR.
  //
  // copy OldFPSCRTmpReg, OldFPSCRReg
  // (INSERT_SUBREG ExtSrcReg, (IMPLICIT_DEF ImDefReg), SrcOp, 1)
  // rldimi NewFPSCRTmpReg, ExtSrcReg, OldFPSCRReg, 0, 62
  // copy NewFPSCRReg, NewFPSCRTmpReg
  // mtfsf 255, NewFPSCRReg
  MachineOperand SrcOp = MI.getOperand(1);
  MachineRegisterInfo &RegInfo = F->getRegInfo();
  Register OldFPSCRTmpReg = RegInfo.createVirtualRegister(&PPC::G8RCRegClass);

  copyRegFromG8RCOrF8RC(OldFPSCRTmpReg, OldFPSCRReg);

  Register ImDefReg = RegInfo.createVirtualRegister(&PPC::G8RCRegClass);
  Register ExtSrcReg = RegInfo.createVirtualRegister(&PPC::G8RCRegClass);

  // The first operand of INSERT_SUBREG should be a register which has
  // subregisters, we only care about its RegClass, so we should use an
  // IMPLICIT_DEF register.
  BuildMI(*BB, MI, dl, TII->get(TargetOpcode::IMPLICIT_DEF), ImDefReg);
  BuildMI(*BB, MI, dl, TII->get(PPC::INSERT_SUBREG), ExtSrcReg)
    .addReg(ImDefReg)
    .add(SrcOp)
    .addImm(1);

  Register NewFPSCRTmpReg = RegInfo.createVirtualRegister(&PPC::G8RCRegClass);
  BuildMI(*BB, MI, dl, TII->get(PPC::RLDIMI), NewFPSCRTmpReg)
    .addReg(OldFPSCRTmpReg)
    .addReg(ExtSrcReg)
    .addImm(0)
    .addImm(62);

  Register NewFPSCRReg = RegInfo.createVirtualRegister(&PPC::F8RCRegClass);
  copyRegFromG8RCOrF8RC(NewFPSCRReg, NewFPSCRTmpReg);

  // The mask 255 means that put the 32:63 bits of NewFPSCRReg to the 32:63
  // bits of FPSCR.
  BuildMI(*BB, MI, dl, TII->get(PPC::MTFSF))
    .addImm(255)
    .addReg(NewFPSCRReg)
    .addImm(0)
    .addImm(0);
} else if (MI.getOpcode() == PPC::SETFLM) {
  DebugLoc Dl = MI.getDebugLoc();

  // Result of setflm is previous FPSCR content, so we need to save it first.
  Register OldFPSCRReg = MI.getOperand(0).getReg();
  if (MRI.use_empty(OldFPSCRReg))
    BuildMI(*BB, MI, Dl, TII->get(TargetOpcode::IMPLICIT_DEF), OldFPSCRReg);
  else
    BuildMI(*BB, MI, Dl, TII->get(PPC::MFFS), OldFPSCRReg);

  // Put bits in 32:63 to FPSCR.
  Register NewFPSCRReg = MI.getOperand(1).getReg();
  BuildMI(*BB, MI, Dl, TII->get(PPC::MTFSF))
      .addImm(255)
      .addReg(NewFPSCRReg)
      .addImm(0)
      .addImm(0);
} else if (MI.getOpcode() == PPC::PROBED_ALLOCA_32 ||
           MI.getOpcode() == PPC::PROBED_ALLOCA_64) {
  return emitProbedAlloca(MI, BB);
} else if (MI.getOpcode() == PPC::SPLIT_QUADWORD) {
  DebugLoc DL = MI.getDebugLoc();
  Register Src = MI.getOperand(2).getReg();
  Register Lo = MI.getOperand(0).getReg();
  Register Hi = MI.getOperand(1).getReg();
  BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY))
      .addDef(Lo)
      .addUse(Src, 0, PPC::sub_gp8_x1);
  BuildMI(*BB, MI, DL, TII->get(TargetOpcode::COPY))
      .addDef(Hi)
      .addUse(Src, 0, PPC::sub_gp8_x0);
} else if (MI.getOpcode() == PPC::LQX_PSEUDO ||
           MI.getOpcode() == PPC::STQX_PSEUDO) {
  DebugLoc DL = MI.getDebugLoc();
  // Ptr is used as the ptr_rc_no_r0 part
  // of LQ/STQ's memory operand and adding result of RA and RB,
  // so it has to be g8rc_and_g8rc_nox0.
  Register Ptr =
      F->getRegInfo().createVirtualRegister(&PPC::G8RC_and_G8RC_NOX0RegClass);
  Register Val = MI.getOperand(0).getReg();
  Register RA = MI.getOperand(1).getReg();
  Register RB = MI.getOperand(2).getReg();
  BuildMI(*BB, MI, DL, TII->get(PPC::ADD8), Ptr).addReg(RA).addReg(RB);
  BuildMI(*BB, MI, DL,
          MI.getOpcode() == PPC::LQX_PSEUDO ? TII->get(PPC::LQ)
                                            : TII->get(PPC::STQ))
      .addReg(Val, MI.getOpcode() == PPC::LQX_PSEUDO ? RegState::Define : 0)
      .addImm(0)
      .addReg(Ptr);
} else {
  llvm_unreachable("Unexpected instr type to insert")::llvm::llvm_unreachable_internal("Unexpected instr type to insert"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13364);
}

MI.eraseFromParent(); // The pseudo instruction is gone now.
return BB;
13369}

13371//===----------------------------------------------------------------------===//
13372// Target Optimization Hooks
13373//===----------------------------------------------------------------------===//

13375static int getEstimateRefinementSteps(EVT VT, const PPCSubtarget &Subtarget) {
// For the estimates, convergence is quadratic, so we essentially double the
// number of digits correct after every iteration. For both FRE and FRSQRTE,
// the minimum architected relative accuracy is 2^-5. When hasRecipPrec(),
// this is 2^-14. IEEE float has 23 digits and double has 52 digits.
int RefinementSteps = Subtarget.hasRecipPrec() ? 1 : 3;
if (VT.getScalarType() == MVT::f64)
  RefinementSteps++;
return RefinementSteps;
13384}

13386SDValue PPCTargetLowering::getSqrtInputTest(SDValue Op, SelectionDAG &DAG,
                                          const DenormalMode &Mode) const {
// We only have VSX Vector Test for software Square Root.
EVT VT = Op.getValueType();
if (!isTypeLegal(MVT::i1) ||
    (VT != MVT::f64 &&
     ((VT != MVT::v2f64 && VT != MVT::v4f32) || !Subtarget.hasVSX())))
  return TargetLowering::getSqrtInputTest(Op, DAG, Mode);

SDLoc DL(Op);
// The output register of FTSQRT is CR field.
SDValue FTSQRT = DAG.getNode(PPCISD::FTSQRT, DL, MVT::i32, Op);
// ftsqrt BF,FRB
// Let e_b be the unbiased exponent of the double-precision
// floating-point operand in register FRB.
// fe_flag is set to 1 if either of the following conditions occurs.
//   - The double-precision floating-point operand in register FRB is a zero,
//     a NaN, or an infinity, or a negative value.
//   - e_b is less than or equal to -970.
// Otherwise fe_flag is set to 0.
// Both VSX and non-VSX versions would set EQ bit in the CR if the number is
// not eligible for iteration. (zero/negative/infinity/nan or unbiased
// exponent is less than -970)
SDValue SRIdxVal = DAG.getTargetConstant(PPC::sub_eq, DL, MVT::i32);
return SDValue(DAG.getMachineNode(TargetOpcode::EXTRACT_SUBREG, DL, MVT::i1,
                                  FTSQRT, SRIdxVal),
               0);
13413}

13415SDValue
13416PPCTargetLowering::getSqrtResultForDenormInput(SDValue Op,
                                             SelectionDAG &DAG) const {
// We only have VSX Vector Square Root.
EVT VT = Op.getValueType();
if (VT != MVT::f64 &&
    ((VT != MVT::v2f64 && VT != MVT::v4f32) || !Subtarget.hasVSX()))
  return TargetLowering::getSqrtResultForDenormInput(Op, DAG);

return DAG.getNode(PPCISD::FSQRT, SDLoc(Op), VT, Op);
13425}

13427SDValue PPCTargetLowering::getSqrtEstimate(SDValue Operand, SelectionDAG &DAG,
                                         int Enabled, int &RefinementSteps,
                                         bool &UseOneConstNR,
                                         bool Reciprocal) const {
EVT VT = Operand.getValueType();
if ((VT == MVT::f32 && Subtarget.hasFRSQRTES()) ||
    (VT == MVT::f64 && Subtarget.hasFRSQRTE()) ||
    (VT == MVT::v4f32 && Subtarget.hasAltivec()) ||
    (VT == MVT::v2f64 && Subtarget.hasVSX())) {
  if (RefinementSteps == ReciprocalEstimate::Unspecified)
    RefinementSteps = getEstimateRefinementSteps(VT, Subtarget);

  // The Newton-Raphson computation with a single constant does not provide
  // enough accuracy on some CPUs.
  UseOneConstNR = !Subtarget.needsTwoConstNR();
  return DAG.getNode(PPCISD::FRSQRTE, SDLoc(Operand), VT, Operand);
}
return SDValue();
13445}

13447SDValue PPCTargetLowering::getRecipEstimate(SDValue Operand, SelectionDAG &DAG,
                                          int Enabled,
                                          int &RefinementSteps) const {
EVT VT = Operand.getValueType();
if ((VT == MVT::f32 && Subtarget.hasFRES()) ||
    (VT == MVT::f64 && Subtarget.hasFRE()) ||
    (VT == MVT::v4f32 && Subtarget.hasAltivec()) ||
    (VT == MVT::v2f64 && Subtarget.hasVSX())) {
  if (RefinementSteps == ReciprocalEstimate::Unspecified)
    RefinementSteps = getEstimateRefinementSteps(VT, Subtarget);
  return DAG.getNode(PPCISD::FRE, SDLoc(Operand), VT, Operand);
}
return SDValue();
13460}

13462unsigned PPCTargetLowering::combineRepeatedFPDivisors() const {
// Note: This functionality is used only when unsafe-fp-math is enabled, and
// on cores with reciprocal estimates (which are used when unsafe-fp-math is
// enabled for division), this functionality is redundant with the default
// combiner logic (once the division -> reciprocal/multiply transformation
// has taken place). As a result, this matters more for older cores than for
// newer ones.

// Combine multiple FDIVs with the same divisor into multiple FMULs by the
// reciprocal if there are two or more FDIVs (for embedded cores with only
// one FP pipeline) for three or more FDIVs (for generic OOO cores).
switch (Subtarget.getCPUDirective()) {
default:
  return 3;
case PPC::DIR_440:
case PPC::DIR_A2:
case PPC::DIR_E500:
case PPC::DIR_E500mc:
case PPC::DIR_E5500:
  return 2;
}
13483}

13485// isConsecutiveLSLoc needs to work even if all adds have not yet been
13486// collapsed, and so we need to look through chains of them.
13487static void getBaseWithConstantOffset(SDValue Loc, SDValue &Base,
                                   int64_t& Offset, SelectionDAG &DAG) {
if (DAG.isBaseWithConstantOffset(Loc)) {
  Base = Loc.getOperand(0);
  Offset += cast<ConstantSDNode>(Loc.getOperand(1))->getSExtValue();

  // The base might itself be a base plus an offset, and if so, accumulate
  // that as well.
  getBaseWithConstantOffset(Loc.getOperand(0), Base, Offset, DAG);
}
13497}

13499static bool isConsecutiveLSLoc(SDValue Loc, EVT VT, LSBaseSDNode *Base,
                          unsigned Bytes, int Dist,
                          SelectionDAG &DAG) {
if (VT.getSizeInBits() / 8 != Bytes)
  return false;

SDValue BaseLoc = Base->getBasePtr();
if (Loc.getOpcode() == ISD::FrameIndex) {
  if (BaseLoc.getOpcode() != ISD::FrameIndex)
    return false;
  const MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo();
  int FI  = cast<FrameIndexSDNode>(Loc)->getIndex();
  int BFI = cast<FrameIndexSDNode>(BaseLoc)->getIndex();
  int FS  = MFI.getObjectSize(FI);
  int BFS = MFI.getObjectSize(BFI);
  if (FS != BFS || FS != (int)Bytes) return false;
  return MFI.getObjectOffset(FI) == (MFI.getObjectOffset(BFI) + Dist*Bytes);
}

SDValue Base1 = Loc, Base2 = BaseLoc;
int64_t Offset1 = 0, Offset2 = 0;
getBaseWithConstantOffset(Loc, Base1, Offset1, DAG);
getBaseWithConstantOffset(BaseLoc, Base2, Offset2, DAG);
if (Base1 == Base2 && Offset1 == (Offset2 + Dist * Bytes))
  return true;

const TargetLowering &TLI = DAG.getTargetLoweringInfo();
const GlobalValue *GV1 = nullptr;
const GlobalValue *GV2 = nullptr;
Offset1 = 0;
Offset2 = 0;
bool isGA1 = TLI.isGAPlusOffset(Loc.getNode(), GV1, Offset1);
bool isGA2 = TLI.isGAPlusOffset(BaseLoc.getNode(), GV2, Offset2);
if (isGA1 && isGA2 && GV1 == GV2)
  return Offset1 == (Offset2 + Dist*Bytes);
return false;
13535}

13537// Like SelectionDAG::isConsecutiveLoad, but also works for stores, and does
13538// not enforce equality of the chain operands.
13539static bool isConsecutiveLS(SDNode *N, LSBaseSDNode *Base,
                          unsigned Bytes, int Dist,
                          SelectionDAG &DAG) {
if (LSBaseSDNode *LS = dyn_cast<LSBaseSDNode>(N)) {
  EVT VT = LS->getMemoryVT();
  SDValue Loc = LS->getBasePtr();
  return isConsecutiveLSLoc(Loc, VT, Base, Bytes, Dist, DAG);
}

if (N->getOpcode() == ISD::INTRINSIC_W_CHAIN) {
  EVT VT;
  switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
  default: return false;
  case Intrinsic::ppc_altivec_lvx:
  case Intrinsic::ppc_altivec_lvxl:
  case Intrinsic::ppc_vsx_lxvw4x:
  case Intrinsic::ppc_vsx_lxvw4x_be:
    VT = MVT::v4i32;
    break;
  case Intrinsic::ppc_vsx_lxvd2x:
  case Intrinsic::ppc_vsx_lxvd2x_be:
    VT = MVT::v2f64;
    break;
  case Intrinsic::ppc_altivec_lvebx:
    VT = MVT::i8;
    break;
  case Intrinsic::ppc_altivec_lvehx:
    VT = MVT::i16;
    break;
  case Intrinsic::ppc_altivec_lvewx:
    VT = MVT::i32;
    break;
  }

  return isConsecutiveLSLoc(N->getOperand(2), VT, Base, Bytes, Dist, DAG);
}

if (N->getOpcode() == ISD::INTRINSIC_VOID) {
  EVT VT;
  switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
  default: return false;
  case Intrinsic::ppc_altivec_stvx:
  case Intrinsic::ppc_altivec_stvxl:
  case Intrinsic::ppc_vsx_stxvw4x:
    VT = MVT::v4i32;
    break;
  case Intrinsic::ppc_vsx_stxvd2x:
    VT = MVT::v2f64;
    break;
  case Intrinsic::ppc_vsx_stxvw4x_be:
    VT = MVT::v4i32;
    break;
  case Intrinsic::ppc_vsx_stxvd2x_be:
    VT = MVT::v2f64;
    break;
  case Intrinsic::ppc_altivec_stvebx:
    VT = MVT::i8;
    break;
  case Intrinsic::ppc_altivec_stvehx:
    VT = MVT::i16;
    break;
  case Intrinsic::ppc_altivec_stvewx:
    VT = MVT::i32;
    break;
  }

  return isConsecutiveLSLoc(N->getOperand(3), VT, Base, Bytes, Dist, DAG);
}

return false;
13609}

13611// Return true is there is a nearyby consecutive load to the one provided
13612// (regardless of alignment). We search up and down the chain, looking though
13613// token factors and other loads (but nothing else). As a result, a true result
13614// indicates that it is safe to create a new consecutive load adjacent to the
13615// load provided.
13616static bool findConsecutiveLoad(LoadSDNode *LD, SelectionDAG &DAG) {
SDValue Chain = LD->getChain();
EVT VT = LD->getMemoryVT();

SmallSet<SDNode *, 16> LoadRoots;
SmallVector<SDNode *, 8> Queue(1, Chain.getNode());
SmallSet<SDNode *, 16> Visited;

// First, search up the chain, branching to follow all token-factor operands.
// If we find a consecutive load, then we're done, otherwise, record all
// nodes just above the top-level loads and token factors.
while (!Queue.empty()) {
  SDNode *ChainNext = Queue.pop_back_val();
  if (!Visited.insert(ChainNext).second)
    continue;

  if (MemSDNode *ChainLD = dyn_cast<MemSDNode>(ChainNext)) {
    if (isConsecutiveLS(ChainLD, LD, VT.getStoreSize(), 1, DAG))
      return true;

    if (!Visited.count(ChainLD->getChain().getNode()))
      Queue.push_back(ChainLD->getChain().getNode());
  } else if (ChainNext->getOpcode() == ISD::TokenFactor) {
    for (const SDUse &O : ChainNext->ops())
      if (!Visited.count(O.getNode()))
        Queue.push_back(O.getNode());
  } else
    LoadRoots.insert(ChainNext);
}

// Second, search down the chain, starting from the top-level nodes recorded
// in the first phase. These top-level nodes are the nodes just above all
// loads and token factors. Starting with their uses, recursively look though
// all loads (just the chain uses) and token factors to find a consecutive
// load.
Visited.clear();
Queue.clear();

for (SDNode *I : LoadRoots) {
  Queue.push_back(I);

  while (!Queue.empty()) {
    SDNode *LoadRoot = Queue.pop_back_val();
    if (!Visited.insert(LoadRoot).second)
      continue;

    if (MemSDNode *ChainLD = dyn_cast<MemSDNode>(LoadRoot))
      if (isConsecutiveLS(ChainLD, LD, VT.getStoreSize(), 1, DAG))
        return true;

    for (SDNode *U : LoadRoot->uses())
      if (((isa<MemSDNode>(U) &&
            cast<MemSDNode>(U)->getChain().getNode() == LoadRoot) ||
           U->getOpcode() == ISD::TokenFactor) &&
          !Visited.count(U))
        Queue.push_back(U);
  }
}

return false;
13676}

13678/// This function is called when we have proved that a SETCC node can be replaced
13679/// by subtraction (and other supporting instructions) so that the result of
13680/// comparison is kept in a GPR instead of CR. This function is purely for
13681/// codegen purposes and has some flags to guide the codegen process.
13682static SDValue generateEquivalentSub(SDNode *N, int Size, bool Complement,
                                   bool Swap, SDLoc &DL, SelectionDAG &DAG) {
assert(N->getOpcode() == ISD::SETCC && "ISD::SETCC Expected.")(static_cast <bool> (N->getOpcode() == ISD::SETCC &&
 "ISD::SETCC Expected.") ? void (0) : __assert_fail ("N->getOpcode() == ISD::SETCC && \"ISD::SETCC Expected.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13684, __extension__
 __PRETTY_FUNCTION__));

// Zero extend the operands to the largest legal integer. Originally, they
// must be of a strictly smaller size.
auto Op0 = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i64, N->getOperand(0),
                       DAG.getConstant(Size, DL, MVT::i32));
auto Op1 = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i64, N->getOperand(1),
                       DAG.getConstant(Size, DL, MVT::i32));

// Swap if needed. Depends on the condition code.
if (Swap)
  std::swap(Op0, Op1);

// Subtract extended integers.
auto SubNode = DAG.getNode(ISD::SUB, DL, MVT::i64, Op0, Op1);

// Move the sign bit to the least significant position and zero out the rest.
// Now the least significant bit carries the result of original comparison.
auto Shifted = DAG.getNode(ISD::SRL, DL, MVT::i64, SubNode,
                           DAG.getConstant(Size - 1, DL, MVT::i32));
auto Final = Shifted;

// Complement the result if needed. Based on the condition code.
if (Complement)
  Final = DAG.getNode(ISD::XOR, DL, MVT::i64, Shifted,
                      DAG.getConstant(1, DL, MVT::i64));

return DAG.getNode(ISD::TRUNCATE, DL, MVT::i1, Final);
13712}

13714SDValue PPCTargetLowering::ConvertSETCCToSubtract(SDNode *N,
                                                DAGCombinerInfo &DCI) const {
assert(N->getOpcode() == ISD::SETCC && "ISD::SETCC Expected.")(static_cast <bool> (N->getOpcode() == ISD::SETCC &&
 "ISD::SETCC Expected.") ? void (0) : __assert_fail ("N->getOpcode() == ISD::SETCC && \"ISD::SETCC Expected.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13716, __extension__
 __PRETTY_FUNCTION__));

SelectionDAG &DAG = DCI.DAG;
SDLoc DL(N);

// Size of integers being compared has a critical role in the following
// analysis, so we prefer to do this when all types are legal.
if (!DCI.isAfterLegalizeDAG())
  return SDValue();

// If all users of SETCC extend its value to a legal integer type
// then we replace SETCC with a subtraction
for (const SDNode *U : N->uses())
  if (U->getOpcode() != ISD::ZERO_EXTEND)
    return SDValue();

ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get();
auto OpSize = N->getOperand(0).getValueSizeInBits();

unsigned Size = DAG.getDataLayout().getLargestLegalIntTypeSizeInBits();

if (OpSize < Size) {
  switch (CC) {
  default: break;
  case ISD::SETULT:
    return generateEquivalentSub(N, Size, false, false, DL, DAG);
  case ISD::SETULE:
    return generateEquivalentSub(N, Size, true, true, DL, DAG);
  case ISD::SETUGT:
    return generateEquivalentSub(N, Size, false, true, DL, DAG);
  case ISD::SETUGE:
    return generateEquivalentSub(N, Size, true, false, DL, DAG);
  }
}

return SDValue();
13752}

13754SDValue PPCTargetLowering::DAGCombineTruncBoolExt(SDNode *N,
                                                DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);

assert(Subtarget.useCRBits() && "Expecting to be tracking CR bits")(static_cast <bool> (Subtarget.useCRBits() && "Expecting to be tracking CR bits"
) ? void (0) : __assert_fail ("Subtarget.useCRBits() && \"Expecting to be tracking CR bits\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 13759, __extension__
 __PRETTY_FUNCTION__));
// If we're tracking CR bits, we need to be careful that we don't have:
//   trunc(binary-ops(zext(x), zext(y)))
// or
//   trunc(binary-ops(binary-ops(zext(x), zext(y)), ...)
// such that we're unnecessarily moving things into GPRs when it would be
// better to keep them in CR bits.

// Note that trunc here can be an actual i1 trunc, or can be the effective
// truncation that comes from a setcc or select_cc.
if (N->getOpcode() == ISD::TRUNCATE &&
    N->getValueType(0) != MVT::i1)
  return SDValue();

if (N->getOperand(0).getValueType() != MVT::i32 &&
    N->getOperand(0).getValueType() != MVT::i64)
  return SDValue();

if (N->getOpcode() == ISD::SETCC ||
    N->getOpcode() == ISD::SELECT_CC) {
  // If we're looking at a comparison, then we need to make sure that the
  // high bits (all except for the first) don't matter the result.
  ISD::CondCode CC =
    cast<CondCodeSDNode>(N->getOperand(
      N->getOpcode() == ISD::SETCC ? 2 : 4))->get();
  unsigned OpBits = N->getOperand(0).getValueSizeInBits();

  if (ISD::isSignedIntSetCC(CC)) {
    if (DAG.ComputeNumSignBits(N->getOperand(0)) != OpBits ||
        DAG.ComputeNumSignBits(N->getOperand(1)) != OpBits)
      return SDValue();
  } else if (ISD::isUnsignedIntSetCC(CC)) {
    if (!DAG.MaskedValueIsZero(N->getOperand(0),
                               APInt::getHighBitsSet(OpBits, OpBits-1)) ||
        !DAG.MaskedValueIsZero(N->getOperand(1),
                               APInt::getHighBitsSet(OpBits, OpBits-1)))
      return (N->getOpcode() == ISD::SETCC ? ConvertSETCCToSubtract(N, DCI)
                                           : SDValue());
  } else {
    // This is neither a signed nor an unsigned comparison, just make sure
    // that the high bits are equal.
    KnownBits Op1Known = DAG.computeKnownBits(N->getOperand(0));
    KnownBits Op2Known = DAG.computeKnownBits(N->getOperand(1));

    // We don't really care about what is known about the first bit (if
    // anything), so pretend that it is known zero for both to ensure they can
    // be compared as constants.
    Op1Known.Zero.setBit(0); Op1Known.One.clearBit(0);
    Op2Known.Zero.setBit(0); Op2Known.One.clearBit(0);

    if (!Op1Known.isConstant() || !Op2Known.isConstant() ||
        Op1Known.getConstant() != Op2Known.getConstant())
      return SDValue();
  }
}

// We now know that the higher-order bits are irrelevant, we just need to
// make sure that all of the intermediate operations are bit operations, and
// all inputs are extensions.
if (N->getOperand(0).getOpcode() != ISD::AND &&
    N->getOperand(0).getOpcode() != ISD::OR  &&
    N->getOperand(0).getOpcode() != ISD::XOR &&
    N->getOperand(0).getOpcode() != ISD::SELECT &&
    N->getOperand(0).getOpcode() != ISD::SELECT_CC &&
    N->getOperand(0).getOpcode() != ISD::TRUNCATE &&
    N->getOperand(0).getOpcode() != ISD::SIGN_EXTEND &&
    N->getOperand(0).getOpcode() != ISD::ZERO_EXTEND &&
    N->getOperand(0).getOpcode() != ISD::ANY_EXTEND)
  return SDValue();

if ((N->getOpcode() == ISD::SETCC || N->getOpcode() == ISD::SELECT_CC) &&
    N->getOperand(1).getOpcode() != ISD::AND &&
    N->getOperand(1).getOpcode() != ISD::OR  &&
    N->getOperand(1).getOpcode() != ISD::XOR &&
    N->getOperand(1).getOpcode() != ISD::SELECT &&
    N->getOperand(1).getOpcode() != ISD::SELECT_CC &&
    N->getOperand(1).getOpcode() != ISD::TRUNCATE &&
    N->getOperand(1).getOpcode() != ISD::SIGN_EXTEND &&
    N->getOperand(1).getOpcode() != ISD::ZERO_EXTEND &&
    N->getOperand(1).getOpcode() != ISD::ANY_EXTEND)
  return SDValue();

SmallVector<SDValue, 4> Inputs;
SmallVector<SDValue, 8> BinOps, PromOps;
SmallPtrSet<SDNode *, 16> Visited;

for (unsigned i = 0; i < 2; ++i) {
  if (((N->getOperand(i).getOpcode() == ISD::SIGN_EXTEND ||
        N->getOperand(i).getOpcode() == ISD::ZERO_EXTEND ||
        N->getOperand(i).getOpcode() == ISD::ANY_EXTEND) &&
        N->getOperand(i).getOperand(0).getValueType() == MVT::i1) ||
      isa<ConstantSDNode>(N->getOperand(i)))
    Inputs.push_back(N->getOperand(i));
  else
    BinOps.push_back(N->getOperand(i));

  if (N->getOpcode() == ISD::TRUNCATE)
    break;
}

// Visit all inputs, collect all binary operations (and, or, xor and
// select) that are all fed by extensions.
while (!BinOps.empty()) {
  SDValue BinOp = BinOps.pop_back_val();

  if (!Visited.insert(BinOp.getNode()).second)
    continue;

  PromOps.push_back(BinOp);

  for (unsigned i = 0, ie = BinOp.getNumOperands(); i != ie; ++i) {
    // The condition of the select is not promoted.
    if (BinOp.getOpcode() == ISD::SELECT && i == 0)
      continue;
    if (BinOp.getOpcode() == ISD::SELECT_CC && i != 2 && i != 3)
      continue;

    if (((BinOp.getOperand(i).getOpcode() == ISD::SIGN_EXTEND ||
          BinOp.getOperand(i).getOpcode() == ISD::ZERO_EXTEND ||
          BinOp.getOperand(i).getOpcode() == ISD::ANY_EXTEND) &&
         BinOp.getOperand(i).getOperand(0).getValueType() == MVT::i1) ||
        isa<ConstantSDNode>(BinOp.getOperand(i))) {
      Inputs.push_back(BinOp.getOperand(i));
    } else if (BinOp.getOperand(i).getOpcode() == ISD::AND ||
               BinOp.getOperand(i).getOpcode() == ISD::OR  ||
               BinOp.getOperand(i).getOpcode() == ISD::XOR ||
               BinOp.getOperand(i).getOpcode() == ISD::SELECT ||
               BinOp.getOperand(i).getOpcode() == ISD::SELECT_CC ||
               BinOp.getOperand(i).getOpcode() == ISD::TRUNCATE ||
               BinOp.getOperand(i).getOpcode() == ISD::SIGN_EXTEND ||
               BinOp.getOperand(i).getOpcode() == ISD::ZERO_EXTEND ||
               BinOp.getOperand(i).getOpcode() == ISD::ANY_EXTEND) {
      BinOps.push_back(BinOp.getOperand(i));
    } else {
      // We have an input that is not an extension or another binary
      // operation; we'll abort this transformation.
      return SDValue();
    }
  }
}

// Make sure that this is a self-contained cluster of operations (which
// is not quite the same thing as saying that everything has only one
// use).
for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
  if (isa<ConstantSDNode>(Inputs[i]))
    continue;

  for (const SDNode *User : Inputs[i].getNode()->uses()) {
    if (User != N && !Visited.count(User))
      return SDValue();

    // Make sure that we're not going to promote the non-output-value
    // operand(s) or SELECT or SELECT_CC.
    // FIXME: Although we could sometimes handle this, and it does occur in
    // practice that one of the condition inputs to the select is also one of
    // the outputs, we currently can't deal with this.
    if (User->getOpcode() == ISD::SELECT) {
      if (User->getOperand(0) == Inputs[i])
        return SDValue();
    } else if (User->getOpcode() == ISD::SELECT_CC) {
      if (User->getOperand(0) == Inputs[i] ||
          User->getOperand(1) == Inputs[i])
        return SDValue();
    }
  }
}

for (unsigned i = 0, ie = PromOps.size(); i != ie; ++i) {
  for (const SDNode *User : PromOps[i].getNode()->uses()) {
    if (User != N && !Visited.count(User))
      return SDValue();

    // Make sure that we're not going to promote the non-output-value
    // operand(s) or SELECT or SELECT_CC.
    // FIXME: Although we could sometimes handle this, and it does occur in
    // practice that one of the condition inputs to the select is also one of
    // the outputs, we currently can't deal with this.
    if (User->getOpcode() == ISD::SELECT) {
      if (User->getOperand(0) == PromOps[i])
        return SDValue();
    } else if (User->getOpcode() == ISD::SELECT_CC) {
      if (User->getOperand(0) == PromOps[i] ||
          User->getOperand(1) == PromOps[i])
        return SDValue();
    }
  }
}

// Replace all inputs with the extension operand.
for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
  // Constants may have users outside the cluster of to-be-promoted nodes,
  // and so we need to replace those as we do the promotions.
  if (isa<ConstantSDNode>(Inputs[i]))
    continue;
  else
    DAG.ReplaceAllUsesOfValueWith(Inputs[i], Inputs[i].getOperand(0));
}

std::list<HandleSDNode> PromOpHandles;
for (auto &PromOp : PromOps)
  PromOpHandles.emplace_back(PromOp);

// Replace all operations (these are all the same, but have a different
// (i1) return type). DAG.getNode will validate that the types of
// a binary operator match, so go through the list in reverse so that
// we've likely promoted both operands first. Any intermediate truncations or
// extensions disappear.
while (!PromOpHandles.empty()) {
  SDValue PromOp = PromOpHandles.back().getValue();
  PromOpHandles.pop_back();

  if (PromOp.getOpcode() == ISD::TRUNCATE ||
      PromOp.getOpcode() == ISD::SIGN_EXTEND ||
      PromOp.getOpcode() == ISD::ZERO_EXTEND ||
      PromOp.getOpcode() == ISD::ANY_EXTEND) {
    if (!isa<ConstantSDNode>(PromOp.getOperand(0)) &&
        PromOp.getOperand(0).getValueType() != MVT::i1) {
      // The operand is not yet ready (see comment below).
      PromOpHandles.emplace_front(PromOp);
      continue;
    }

    SDValue RepValue = PromOp.getOperand(0);
    if (isa<ConstantSDNode>(RepValue))
      RepValue = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, RepValue);

    DAG.ReplaceAllUsesOfValueWith(PromOp, RepValue);
    continue;
  }

  unsigned C;
  switch (PromOp.getOpcode()) {
  default:             C = 0; break;
  case ISD::SELECT:    C = 1; break;
  case ISD::SELECT_CC: C = 2; break;
  }

  if ((!isa<ConstantSDNode>(PromOp.getOperand(C)) &&
       PromOp.getOperand(C).getValueType() != MVT::i1) ||
      (!isa<ConstantSDNode>(PromOp.getOperand(C+1)) &&
       PromOp.getOperand(C+1).getValueType() != MVT::i1)) {
    // The to-be-promoted operands of this node have not yet been
    // promoted (this should be rare because we're going through the
    // list backward, but if one of the operands has several users in
    // this cluster of to-be-promoted nodes, it is possible).
    PromOpHandles.emplace_front(PromOp);
    continue;
  }

  SmallVector<SDValue, 3> Ops(PromOp.getNode()->op_begin(),
                              PromOp.getNode()->op_end());

  // If there are any constant inputs, make sure they're replaced now.
  for (unsigned i = 0; i < 2; ++i)
    if (isa<ConstantSDNode>(Ops[C+i]))
      Ops[C+i] = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, Ops[C+i]);

  DAG.ReplaceAllUsesOfValueWith(PromOp,
    DAG.getNode(PromOp.getOpcode(), dl, MVT::i1, Ops));
}

// Now we're left with the initial truncation itself.
if (N->getOpcode() == ISD::TRUNCATE)
  return N->getOperand(0);

// Otherwise, this is a comparison. The operands to be compared have just
// changed type (to i1), but everything else is the same.
return SDValue(N, 0);
14028}

14030SDValue PPCTargetLowering::DAGCombineExtBoolTrunc(SDNode *N,
                                                DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);

// If we're tracking CR bits, we need to be careful that we don't have:
//   zext(binary-ops(trunc(x), trunc(y)))
// or
//   zext(binary-ops(binary-ops(trunc(x), trunc(y)), ...)
// such that we're unnecessarily moving things into CR bits that can more
// efficiently stay in GPRs. Note that if we're not certain that the high
// bits are set as required by the final extension, we still may need to do
// some masking to get the proper behavior.

// This same functionality is important on PPC64 when dealing with
// 32-to-64-bit extensions; these occur often when 32-bit values are used as
// the return values of functions. Because it is so similar, it is handled
// here as well.

if (N->getValueType(0) != MVT::i32 &&
    N->getValueType(0) != MVT::i64)
  return SDValue();

if (!((N->getOperand(0).getValueType() == MVT::i1 && Subtarget.useCRBits()) ||
      (N->getOperand(0).getValueType() == MVT::i32 && Subtarget.isPPC64())))
  return SDValue();

if (N->getOperand(0).getOpcode() != ISD::AND &&
    N->getOperand(0).getOpcode() != ISD::OR  &&
    N->getOperand(0).getOpcode() != ISD::XOR &&
    N->getOperand(0).getOpcode() != ISD::SELECT &&
    N->getOperand(0).getOpcode() != ISD::SELECT_CC)
  return SDValue();

SmallVector<SDValue, 4> Inputs;
SmallVector<SDValue, 8> BinOps(1, N->getOperand(0)), PromOps;
SmallPtrSet<SDNode *, 16> Visited;

// Visit all inputs, collect all binary operations (and, or, xor and
// select) that are all fed by truncations.
while (!BinOps.empty()) {
  SDValue BinOp = BinOps.pop_back_val();

  if (!Visited.insert(BinOp.getNode()).second)
    continue;

  PromOps.push_back(BinOp);

  for (unsigned i = 0, ie = BinOp.getNumOperands(); i != ie; ++i) {
    // The condition of the select is not promoted.
    if (BinOp.getOpcode() == ISD::SELECT && i == 0)
      continue;
    if (BinOp.getOpcode() == ISD::SELECT_CC && i != 2 && i != 3)
      continue;

    if (BinOp.getOperand(i).getOpcode() == ISD::TRUNCATE ||
        isa<ConstantSDNode>(BinOp.getOperand(i))) {
      Inputs.push_back(BinOp.getOperand(i));
    } else if (BinOp.getOperand(i).getOpcode() == ISD::AND ||
               BinOp.getOperand(i).getOpcode() == ISD::OR  ||
               BinOp.getOperand(i).getOpcode() == ISD::XOR ||
               BinOp.getOperand(i).getOpcode() == ISD::SELECT ||
               BinOp.getOperand(i).getOpcode() == ISD::SELECT_CC) {
      BinOps.push_back(BinOp.getOperand(i));
    } else {
      // We have an input that is not a truncation or another binary
      // operation; we'll abort this transformation.
      return SDValue();
    }
  }
}

// The operands of a select that must be truncated when the select is
// promoted because the operand is actually part of the to-be-promoted set.
DenseMap<SDNode *, EVT> SelectTruncOp[2];

// Make sure that this is a self-contained cluster of operations (which
// is not quite the same thing as saying that everything has only one
// use).
for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
  if (isa<ConstantSDNode>(Inputs[i]))
    continue;

  for (SDNode *User : Inputs[i].getNode()->uses()) {
    if (User != N && !Visited.count(User))
      return SDValue();

    // If we're going to promote the non-output-value operand(s) or SELECT or
    // SELECT_CC, record them for truncation.
    if (User->getOpcode() == ISD::SELECT) {
      if (User->getOperand(0) == Inputs[i])
        SelectTruncOp[0].insert(std::make_pair(User,
                                  User->getOperand(0).getValueType()));
    } else if (User->getOpcode() == ISD::SELECT_CC) {
      if (User->getOperand(0) == Inputs[i])
        SelectTruncOp[0].insert(std::make_pair(User,
                                  User->getOperand(0).getValueType()));
      if (User->getOperand(1) == Inputs[i])
        SelectTruncOp[1].insert(std::make_pair(User,
                                  User->getOperand(1).getValueType()));
    }
  }
}

for (unsigned i = 0, ie = PromOps.size(); i != ie; ++i) {
  for (SDNode *User : PromOps[i].getNode()->uses()) {
    if (User != N && !Visited.count(User))
      return SDValue();

    // If we're going to promote the non-output-value operand(s) or SELECT or
    // SELECT_CC, record them for truncation.
    if (User->getOpcode() == ISD::SELECT) {
      if (User->getOperand(0) == PromOps[i])
        SelectTruncOp[0].insert(std::make_pair(User,
                                  User->getOperand(0).getValueType()));
    } else if (User->getOpcode() == ISD::SELECT_CC) {
      if (User->getOperand(0) == PromOps[i])
        SelectTruncOp[0].insert(std::make_pair(User,
                                  User->getOperand(0).getValueType()));
      if (User->getOperand(1) == PromOps[i])
        SelectTruncOp[1].insert(std::make_pair(User,
                                  User->getOperand(1).getValueType()));
    }
  }
}

unsigned PromBits = N->getOperand(0).getValueSizeInBits();
bool ReallyNeedsExt = false;
if (N->getOpcode() != ISD::ANY_EXTEND) {
  // If all of the inputs are not already sign/zero extended, then
  // we'll still need to do that at the end.
  for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
    if (isa<ConstantSDNode>(Inputs[i]))
      continue;

    unsigned OpBits =
      Inputs[i].getOperand(0).getValueSizeInBits();
    assert(PromBits < OpBits && "Truncation not to a smaller bit count?")(static_cast <bool> (PromBits < OpBits && "Truncation not to a smaller bit count?"
) ? void (0) : __assert_fail ("PromBits < OpBits && \"Truncation not to a smaller bit count?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14167, __extension__
 __PRETTY_FUNCTION__));

    if ((N->getOpcode() == ISD::ZERO_EXTEND &&
         !DAG.MaskedValueIsZero(Inputs[i].getOperand(0),
                                APInt::getHighBitsSet(OpBits,
                                                      OpBits-PromBits))) ||
        (N->getOpcode() == ISD::SIGN_EXTEND &&
         DAG.ComputeNumSignBits(Inputs[i].getOperand(0)) <
           (OpBits-(PromBits-1)))) {
      ReallyNeedsExt = true;
      break;
    }
  }
}

// Replace all inputs, either with the truncation operand, or a
// truncation or extension to the final output type.
for (unsigned i = 0, ie = Inputs.size(); i != ie; ++i) {
  // Constant inputs need to be replaced with the to-be-promoted nodes that
  // use them because they might have users outside of the cluster of
  // promoted nodes.
  if (isa<ConstantSDNode>(Inputs[i]))
    continue;

  SDValue InSrc = Inputs[i].getOperand(0);
  if (Inputs[i].getValueType() == N->getValueType(0))
    DAG.ReplaceAllUsesOfValueWith(Inputs[i], InSrc);
  else if (N->getOpcode() == ISD::SIGN_EXTEND)
    DAG.ReplaceAllUsesOfValueWith(Inputs[i],
      DAG.getSExtOrTrunc(InSrc, dl, N->getValueType(0)));
  else if (N->getOpcode() == ISD::ZERO_EXTEND)
    DAG.ReplaceAllUsesOfValueWith(Inputs[i],
      DAG.getZExtOrTrunc(InSrc, dl, N->getValueType(0)));
  else
    DAG.ReplaceAllUsesOfValueWith(Inputs[i],
      DAG.getAnyExtOrTrunc(InSrc, dl, N->getValueType(0)));
}

std::list<HandleSDNode> PromOpHandles;
for (auto &PromOp : PromOps)
  PromOpHandles.emplace_back(PromOp);

// Replace all operations (these are all the same, but have a different
// (promoted) return type). DAG.getNode will validate that the types of
// a binary operator match, so go through the list in reverse so that
// we've likely promoted both operands first.
while (!PromOpHandles.empty()) {
  SDValue PromOp = PromOpHandles.back().getValue();
  PromOpHandles.pop_back();

  unsigned C;
  switch (PromOp.getOpcode()) {
  default:             C = 0; break;
  case ISD::SELECT:    C = 1; break;
  case ISD::SELECT_CC: C = 2; break;
  }

  if ((!isa<ConstantSDNode>(PromOp.getOperand(C)) &&
       PromOp.getOperand(C).getValueType() != N->getValueType(0)) ||
      (!isa<ConstantSDNode>(PromOp.getOperand(C+1)) &&
       PromOp.getOperand(C+1).getValueType() != N->getValueType(0))) {
    // The to-be-promoted operands of this node have not yet been
    // promoted (this should be rare because we're going through the
    // list backward, but if one of the operands has several users in
    // this cluster of to-be-promoted nodes, it is possible).
    PromOpHandles.emplace_front(PromOp);
    continue;
  }

  // For SELECT and SELECT_CC nodes, we do a similar check for any
  // to-be-promoted comparison inputs.
  if (PromOp.getOpcode() == ISD::SELECT ||
      PromOp.getOpcode() == ISD::SELECT_CC) {
    if ((SelectTruncOp[0].count(PromOp.getNode()) &&
         PromOp.getOperand(0).getValueType() != N->getValueType(0)) ||
        (SelectTruncOp[1].count(PromOp.getNode()) &&
         PromOp.getOperand(1).getValueType() != N->getValueType(0))) {
      PromOpHandles.emplace_front(PromOp);
      continue;
    }
  }

  SmallVector<SDValue, 3> Ops(PromOp.getNode()->op_begin(),
                              PromOp.getNode()->op_end());

  // If this node has constant inputs, then they'll need to be promoted here.
  for (unsigned i = 0; i < 2; ++i) {
    if (!isa<ConstantSDNode>(Ops[C+i]))
      continue;
    if (Ops[C+i].getValueType() == N->getValueType(0))
      continue;

    if (N->getOpcode() == ISD::SIGN_EXTEND)
      Ops[C+i] = DAG.getSExtOrTrunc(Ops[C+i], dl, N->getValueType(0));
    else if (N->getOpcode() == ISD::ZERO_EXTEND)
      Ops[C+i] = DAG.getZExtOrTrunc(Ops[C+i], dl, N->getValueType(0));
    else
      Ops[C+i] = DAG.getAnyExtOrTrunc(Ops[C+i], dl, N->getValueType(0));
  }

  // If we've promoted the comparison inputs of a SELECT or SELECT_CC,
  // truncate them again to the original value type.
  if (PromOp.getOpcode() == ISD::SELECT ||
      PromOp.getOpcode() == ISD::SELECT_CC) {
    auto SI0 = SelectTruncOp[0].find(PromOp.getNode());
    if (SI0 != SelectTruncOp[0].end())
      Ops[0] = DAG.getNode(ISD::TRUNCATE, dl, SI0->second, Ops[0]);
    auto SI1 = SelectTruncOp[1].find(PromOp.getNode());
    if (SI1 != SelectTruncOp[1].end())
      Ops[1] = DAG.getNode(ISD::TRUNCATE, dl, SI1->second, Ops[1]);
  }

  DAG.ReplaceAllUsesOfValueWith(PromOp,
    DAG.getNode(PromOp.getOpcode(), dl, N->getValueType(0), Ops));
}

// Now we're left with the initial extension itself.
if (!ReallyNeedsExt)
  return N->getOperand(0);

// To zero extend, just mask off everything except for the first bit (in the
// i1 case).
if (N->getOpcode() == ISD::ZERO_EXTEND)
  return DAG.getNode(ISD::AND, dl, N->getValueType(0), N->getOperand(0),
                     DAG.getConstant(APInt::getLowBitsSet(
                                       N->getValueSizeInBits(0), PromBits),
                                     dl, N->getValueType(0)));

assert(N->getOpcode() == ISD::SIGN_EXTEND &&(static_cast <bool> (N->getOpcode() == ISD::SIGN_EXTEND
 && "Invalid extension type") ? void (0) : __assert_fail
 ("N->getOpcode() == ISD::SIGN_EXTEND && \"Invalid extension type\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14296, __extension__
 __PRETTY_FUNCTION__))
       "Invalid extension type")(static_cast <bool> (N->getOpcode() == ISD::SIGN_EXTEND
 && "Invalid extension type") ? void (0) : __assert_fail
 ("N->getOpcode() == ISD::SIGN_EXTEND && \"Invalid extension type\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14296, __extension__
 __PRETTY_FUNCTION__));
EVT ShiftAmountTy = getShiftAmountTy(N->getValueType(0), DAG.getDataLayout());
SDValue ShiftCst =
    DAG.getConstant(N->getValueSizeInBits(0) - PromBits, dl, ShiftAmountTy);
return DAG.getNode(
    ISD::SRA, dl, N->getValueType(0),
    DAG.getNode(ISD::SHL, dl, N->getValueType(0), N->getOperand(0), ShiftCst),
    ShiftCst);
14304}

14306SDValue PPCTargetLowering::combineSetCC(SDNode *N,
                                      DAGCombinerInfo &DCI) const {
assert(N->getOpcode() == ISD::SETCC &&(static_cast <bool> (N->getOpcode() == ISD::SETCC &&
 "Should be called with a SETCC node") ? void (0) : __assert_fail
 ("N->getOpcode() == ISD::SETCC && \"Should be called with a SETCC node\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14309, __extension__
 __PRETTY_FUNCTION__))
       "Should be called with a SETCC node")(static_cast <bool> (N->getOpcode() == ISD::SETCC &&
 "Should be called with a SETCC node") ? void (0) : __assert_fail
 ("N->getOpcode() == ISD::SETCC && \"Should be called with a SETCC node\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14309, __extension__
 __PRETTY_FUNCTION__));

ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(2))->get();
if (CC == ISD::SETNE || CC == ISD::SETEQ) {
  SDValue LHS = N->getOperand(0);
  SDValue RHS = N->getOperand(1);

  // If there is a '0 - y' pattern, canonicalize the pattern to the RHS.
  if (LHS.getOpcode() == ISD::SUB && isNullConstant(LHS.getOperand(0)) &&
      LHS.hasOneUse())
    std::swap(LHS, RHS);

  // x == 0-y --> x+y == 0
  // x != 0-y --> x+y != 0
  if (RHS.getOpcode() == ISD::SUB && isNullConstant(RHS.getOperand(0)) &&
      RHS.hasOneUse()) {
    SDLoc DL(N);
    SelectionDAG &DAG = DCI.DAG;
    EVT VT = N->getValueType(0);
    EVT OpVT = LHS.getValueType();
    SDValue Add = DAG.getNode(ISD::ADD, DL, OpVT, LHS, RHS.getOperand(1));
    return DAG.getSetCC(DL, VT, Add, DAG.getConstant(0, DL, OpVT), CC);
  }
}

return DAGCombineTruncBoolExt(N, DCI);
14335}

14337// Is this an extending load from an f32 to an f64?
14338static bool isFPExtLoad(SDValue Op) {
if (LoadSDNode *LD = dyn_cast<LoadSDNode>(Op.getNode()))
  return LD->getExtensionType() == ISD::EXTLOAD &&
    Op.getValueType() == MVT::f64;
return false;
14343}

14345/// Reduces the number of fp-to-int conversion when building a vector.
14346///
14347/// If this vector is built out of floating to integer conversions,
14348/// transform it to a vector built out of floating point values followed by a
14349/// single floating to integer conversion of the vector.
14350/// Namely  (build_vector (fptosi $A), (fptosi $B), ...)
14351/// becomes (fptosi (build_vector ($A, $B, ...)))
14352SDValue PPCTargetLowering::
14353combineElementTruncationToVectorTruncation(SDNode *N,
                                         DAGCombinerInfo &DCI) const {
assert(N->getOpcode() == ISD::BUILD_VECTOR &&(static_cast <bool> (N->getOpcode() == ISD::BUILD_VECTOR
 && "Should be called with a BUILD_VECTOR node") ? void
 (0) : __assert_fail ("N->getOpcode() == ISD::BUILD_VECTOR && \"Should be called with a BUILD_VECTOR node\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14356, __extension__
 __PRETTY_FUNCTION__))
       "Should be called with a BUILD_VECTOR node")(static_cast <bool> (N->getOpcode() == ISD::BUILD_VECTOR
 && "Should be called with a BUILD_VECTOR node") ? void
 (0) : __assert_fail ("N->getOpcode() == ISD::BUILD_VECTOR && \"Should be called with a BUILD_VECTOR node\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14356, __extension__
 __PRETTY_FUNCTION__));

SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);

SDValue FirstInput = N->getOperand(0);
assert(FirstInput.getOpcode() == PPCISD::MFVSR &&(static_cast <bool> (FirstInput.getOpcode() == PPCISD::
MFVSR && "The input operand must be an fp-to-int conversion."
) ? void (0) : __assert_fail ("FirstInput.getOpcode() == PPCISD::MFVSR && \"The input operand must be an fp-to-int conversion.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14363, __extension__
 __PRETTY_FUNCTION__))
       "The input operand must be an fp-to-int conversion.")(static_cast <bool> (FirstInput.getOpcode() == PPCISD::
MFVSR && "The input operand must be an fp-to-int conversion."
) ? void (0) : __assert_fail ("FirstInput.getOpcode() == PPCISD::MFVSR && \"The input operand must be an fp-to-int conversion.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14363, __extension__
 __PRETTY_FUNCTION__));

// This combine happens after legalization so the fp_to_[su]i nodes are
// already converted to PPCSISD nodes.
unsigned FirstConversion = FirstInput.getOperand(0).getOpcode();
if (FirstConversion == PPCISD::FCTIDZ ||
    FirstConversion == PPCISD::FCTIDUZ ||
    FirstConversion == PPCISD::FCTIWZ ||
    FirstConversion == PPCISD::FCTIWUZ) {
  bool IsSplat = true;
  bool Is32Bit = FirstConversion == PPCISD::FCTIWZ ||
    FirstConversion == PPCISD::FCTIWUZ;
  EVT SrcVT = FirstInput.getOperand(0).getValueType();
  SmallVector<SDValue, 4> Ops;
  EVT TargetVT = N->getValueType(0);
  for (int i = 0, e = N->getNumOperands(); i < e; ++i) {
    SDValue NextOp = N->getOperand(i);
    if (NextOp.getOpcode() != PPCISD::MFVSR)
      return SDValue();
    unsigned NextConversion = NextOp.getOperand(0).getOpcode();
    if (NextConversion != FirstConversion)
      return SDValue();
    // If we are converting to 32-bit integers, we need to add an FP_ROUND.
    // This is not valid if the input was originally double precision. It is
    // also not profitable to do unless this is an extending load in which
    // case doing this combine will allow us to combine consecutive loads.
    if (Is32Bit && !isFPExtLoad(NextOp.getOperand(0).getOperand(0)))
      return SDValue();
    if (N->getOperand(i) != FirstInput)
      IsSplat = false;
  }

  // If this is a splat, we leave it as-is since there will be only a single
  // fp-to-int conversion followed by a splat of the integer. This is better
  // for 32-bit and smaller ints and neutral for 64-bit ints.
  if (IsSplat)
    return SDValue();

  // Now that we know we have the right type of node, get its operands
  for (int i = 0, e = N->getNumOperands(); i < e; ++i) {
    SDValue In = N->getOperand(i).getOperand(0);
    if (Is32Bit) {
      // For 32-bit values, we need to add an FP_ROUND node (if we made it
      // here, we know that all inputs are extending loads so this is safe).
      if (In.isUndef())
        Ops.push_back(DAG.getUNDEF(SrcVT));
      else {
        SDValue Trunc =
            DAG.getNode(ISD::FP_ROUND, dl, MVT::f32, In.getOperand(0),
                        DAG.getIntPtrConstant(1, dl, /*isTarget=*/true));
        Ops.push_back(Trunc);
      }
    } else
      Ops.push_back(In.isUndef() ? DAG.getUNDEF(SrcVT) : In.getOperand(0));
  }

  unsigned Opcode;
  if (FirstConversion == PPCISD::FCTIDZ ||
      FirstConversion == PPCISD::FCTIWZ)
    Opcode = ISD::FP_TO_SINT;
  else
    Opcode = ISD::FP_TO_UINT;

  EVT NewVT = TargetVT == MVT::v2i64 ? MVT::v2f64 : MVT::v4f32;
  SDValue BV = DAG.getBuildVector(NewVT, dl, Ops);
  return DAG.getNode(Opcode, dl, TargetVT, BV);
}
return SDValue();
14431}

14433/// Reduce the number of loads when building a vector.
14434///
14435/// Building a vector out of multiple loads can be converted to a load
14436/// of the vector type if the loads are consecutive. If the loads are
14437/// consecutive but in descending order, a shuffle is added at the end
14438/// to reorder the vector.
14439static SDValue combineBVOfConsecutiveLoads(SDNode *N, SelectionDAG &DAG) {
assert(N->getOpcode() == ISD::BUILD_VECTOR &&(static_cast <bool> (N->getOpcode() == ISD::BUILD_VECTOR
 && "Should be called with a BUILD_VECTOR node") ? void
 (0) : __assert_fail ("N->getOpcode() == ISD::BUILD_VECTOR && \"Should be called with a BUILD_VECTOR node\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14441, __extension__
 __PRETTY_FUNCTION__))
       "Should be called with a BUILD_VECTOR node")(static_cast <bool> (N->getOpcode() == ISD::BUILD_VECTOR
 && "Should be called with a BUILD_VECTOR node") ? void
 (0) : __assert_fail ("N->getOpcode() == ISD::BUILD_VECTOR && \"Should be called with a BUILD_VECTOR node\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14441, __extension__
 __PRETTY_FUNCTION__));

SDLoc dl(N);

// Return early for non byte-sized type, as they can't be consecutive.
if (!N->getValueType(0).getVectorElementType().isByteSized())
  return SDValue();

bool InputsAreConsecutiveLoads = true;
bool InputsAreReverseConsecutive = true;
unsigned ElemSize = N->getValueType(0).getScalarType().getStoreSize();
SDValue FirstInput = N->getOperand(0);
bool IsRoundOfExtLoad = false;
LoadSDNode *FirstLoad = nullptr;

if (FirstInput.getOpcode() == ISD::FP_ROUND &&
    FirstInput.getOperand(0).getOpcode() == ISD::LOAD) {
  FirstLoad = cast<LoadSDNode>(FirstInput.getOperand(0));
  IsRoundOfExtLoad = FirstLoad->getExtensionType() == ISD::EXTLOAD;
}
// Not a build vector of (possibly fp_rounded) loads.
if ((!IsRoundOfExtLoad && FirstInput.getOpcode() != ISD::LOAD) ||
    N->getNumOperands() == 1)
  return SDValue();

if (!IsRoundOfExtLoad)
  FirstLoad = cast<LoadSDNode>(FirstInput);

SmallVector<LoadSDNode *, 4> InputLoads;
InputLoads.push_back(FirstLoad);
for (int i = 1, e = N->getNumOperands(); i < e; ++i) {
  // If any inputs are fp_round(extload), they all must be.
  if (IsRoundOfExtLoad && N->getOperand(i).getOpcode() != ISD::FP_ROUND)
    return SDValue();

  SDValue NextInput = IsRoundOfExtLoad ? N->getOperand(i).getOperand(0) :
    N->getOperand(i);
  if (NextInput.getOpcode() != ISD::LOAD)
    return SDValue();

  SDValue PreviousInput =
    IsRoundOfExtLoad ? N->getOperand(i-1).getOperand(0) : N->getOperand(i-1);
  LoadSDNode *LD1 = cast<LoadSDNode>(PreviousInput);
  LoadSDNode *LD2 = cast<LoadSDNode>(NextInput);

  // If any inputs are fp_round(extload), they all must be.
  if (IsRoundOfExtLoad && LD2->getExtensionType() != ISD::EXTLOAD)
    return SDValue();

  // We only care about regular loads. The PPC-specific load intrinsics
  // will not lead to a merge opportunity.
  if (!DAG.areNonVolatileConsecutiveLoads(LD2, LD1, ElemSize, 1))
    InputsAreConsecutiveLoads = false;
  if (!DAG.areNonVolatileConsecutiveLoads(LD1, LD2, ElemSize, 1))
    InputsAreReverseConsecutive = false;

  // Exit early if the loads are neither consecutive nor reverse consecutive.
  if (!InputsAreConsecutiveLoads && !InputsAreReverseConsecutive)
    return SDValue();
  InputLoads.push_back(LD2);
}

assert(!(InputsAreConsecutiveLoads && InputsAreReverseConsecutive) &&(static_cast <bool> (!(InputsAreConsecutiveLoads &&
 InputsAreReverseConsecutive) && "The loads cannot be both consecutive and reverse consecutive."
) ? void (0) : __assert_fail ("!(InputsAreConsecutiveLoads && InputsAreReverseConsecutive) && \"The loads cannot be both consecutive and reverse consecutive.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14504, __extension__
 __PRETTY_FUNCTION__))
       "The loads cannot be both consecutive and reverse consecutive.")(static_cast <bool> (!(InputsAreConsecutiveLoads &&
 InputsAreReverseConsecutive) && "The loads cannot be both consecutive and reverse consecutive."
) ? void (0) : __assert_fail ("!(InputsAreConsecutiveLoads && InputsAreReverseConsecutive) && \"The loads cannot be both consecutive and reverse consecutive.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14504, __extension__
 __PRETTY_FUNCTION__));

SDValue WideLoad;
SDValue ReturnSDVal;
if (InputsAreConsecutiveLoads) {
  assert(FirstLoad && "Input needs to be a LoadSDNode.")(static_cast <bool> (FirstLoad && "Input needs to be a LoadSDNode."
) ? void (0) : __assert_fail ("FirstLoad && \"Input needs to be a LoadSDNode.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14509, __extension__
 __PRETTY_FUNCTION__));
  WideLoad = DAG.getLoad(N->getValueType(0), dl, FirstLoad->getChain(),
                         FirstLoad->getBasePtr(), FirstLoad->getPointerInfo(),
                         FirstLoad->getAlign());
  ReturnSDVal = WideLoad;
} else if (InputsAreReverseConsecutive) {
  LoadSDNode *LastLoad = InputLoads.back();
  assert(LastLoad && "Input needs to be a LoadSDNode.")(static_cast <bool> (LastLoad && "Input needs to be a LoadSDNode."
) ? void (0) : __assert_fail ("LastLoad && \"Input needs to be a LoadSDNode.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14516, __extension__
 __PRETTY_FUNCTION__));
  WideLoad = DAG.getLoad(N->getValueType(0), dl, LastLoad->getChain(),
                         LastLoad->getBasePtr(), LastLoad->getPointerInfo(),
                         LastLoad->getAlign());
  SmallVector<int, 16> Ops;
  for (int i = N->getNumOperands() - 1; i >= 0; i--)
    Ops.push_back(i);

  ReturnSDVal = DAG.getVectorShuffle(N->getValueType(0), dl, WideLoad,
                                     DAG.getUNDEF(N->getValueType(0)), Ops);
} else
  return SDValue();

for (auto *LD : InputLoads)
  DAG.makeEquivalentMemoryOrdering(LD, WideLoad);
return ReturnSDVal;
14532}

14534// This function adds the required vector_shuffle needed to get
14535// the elements of the vector extract in the correct position
14536// as specified by the CorrectElems encoding.
14537static SDValue addShuffleForVecExtend(SDNode *N, SelectionDAG &DAG,
                                    SDValue Input, uint64_t Elems,
                                    uint64_t CorrectElems) {
SDLoc dl(N);

unsigned NumElems = Input.getValueType().getVectorNumElements();
SmallVector<int, 16> ShuffleMask(NumElems, -1);

// Knowing the element indices being extracted from the original
// vector and the order in which they're being inserted, just put
// them at element indices required for the instruction.
for (unsigned i = 0; i < N->getNumOperands(); i++) {
  if (DAG.getDataLayout().isLittleEndian())
    ShuffleMask[CorrectElems & 0xF] = Elems & 0xF;
  else
    ShuffleMask[(CorrectElems & 0xF0) >> 4] = (Elems & 0xF0) >> 4;
  CorrectElems = CorrectElems >> 8;
  Elems = Elems >> 8;
}

SDValue Shuffle =
    DAG.getVectorShuffle(Input.getValueType(), dl, Input,
                         DAG.getUNDEF(Input.getValueType()), ShuffleMask);

EVT VT = N->getValueType(0);
SDValue Conv = DAG.getBitcast(VT, Shuffle);

EVT ExtVT = EVT::getVectorVT(*DAG.getContext(),
                             Input.getValueType().getVectorElementType(),
                             VT.getVectorNumElements());
return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, VT, Conv,
                   DAG.getValueType(ExtVT));
14569}

14571// Look for build vector patterns where input operands come from sign
14572// extended vector_extract elements of specific indices. If the correct indices
14573// aren't used, add a vector shuffle to fix up the indices and create
14574// SIGN_EXTEND_INREG node which selects the vector sign extend instructions
14575// during instruction selection.
14576static SDValue combineBVOfVecSExt(SDNode *N, SelectionDAG &DAG) {
// This array encodes the indices that the vector sign extend instructions
// extract from when extending from one type to another for both BE and LE.
// The right nibble of each byte corresponds to the LE incides.
// and the left nibble of each byte corresponds to the BE incides.
// For example: 0x3074B8FC  byte->word
// For LE: the allowed indices are: 0x0,0x4,0x8,0xC
// For BE: the allowed indices are: 0x3,0x7,0xB,0xF
// For example: 0x000070F8  byte->double word
// For LE: the allowed indices are: 0x0,0x8
// For BE: the allowed indices are: 0x7,0xF
uint64_t TargetElems[] = {
    0x3074B8FC, // b->w
    0x000070F8, // b->d
    0x10325476, // h->w
    0x00003074, // h->d
    0x00001032, // w->d
};

uint64_t Elems = 0;
int Index;
SDValue Input;

auto isSExtOfVecExtract = [&](SDValue Op) -> bool {
  if (!Op)
    return false;
  if (Op.getOpcode() != ISD::SIGN_EXTEND &&
      Op.getOpcode() != ISD::SIGN_EXTEND_INREG)
    return false;

  // A SIGN_EXTEND_INREG might be fed by an ANY_EXTEND to produce a value
  // of the right width.
  SDValue Extract = Op.getOperand(0);
  if (Extract.getOpcode() == ISD::ANY_EXTEND)
    Extract = Extract.getOperand(0);
  if (Extract.getOpcode() != ISD::EXTRACT_VECTOR_ELT)
    return false;

  ConstantSDNode *ExtOp = dyn_cast<ConstantSDNode>(Extract.getOperand(1));
  if (!ExtOp)
    return false;

  Index = ExtOp->getZExtValue();
  if (Input && Input != Extract.getOperand(0))
    return false;

  if (!Input)
    Input = Extract.getOperand(0);

  Elems = Elems << 8;
  Index = DAG.getDataLayout().isLittleEndian() ? Index : Index << 4;
  Elems |= Index;

  return true;
};

// If the build vector operands aren't sign extended vector extracts,
// of the same input vector, then return.
for (unsigned i = 0; i < N->getNumOperands(); i++) {
  if (!isSExtOfVecExtract(N->getOperand(i))) {
    return SDValue();
  }
}

// If the vector extract indicies are not correct, add the appropriate
// vector_shuffle.
int TgtElemArrayIdx;
int InputSize = Input.getValueType().getScalarSizeInBits();
int OutputSize = N->getValueType(0).getScalarSizeInBits();
if (InputSize + OutputSize == 40)
  TgtElemArrayIdx = 0;
else if (InputSize + OutputSize == 72)
  TgtElemArrayIdx = 1;
else if (InputSize + OutputSize == 48)
  TgtElemArrayIdx = 2;
else if (InputSize + OutputSize == 80)
  TgtElemArrayIdx = 3;
else if (InputSize + OutputSize == 96)
  TgtElemArrayIdx = 4;
else
  return SDValue();

uint64_t CorrectElems = TargetElems[TgtElemArrayIdx];
CorrectElems = DAG.getDataLayout().isLittleEndian()
                   ? CorrectElems & 0x0F0F0F0F0F0F0F0F
                   : CorrectElems & 0xF0F0F0F0F0F0F0F0;
if (Elems != CorrectElems) {
  return addShuffleForVecExtend(N, DAG, Input, Elems, CorrectElems);
}

// Regular lowering will catch cases where a shuffle is not needed.
return SDValue();
14668}

14670// Look for the pattern of a load from a narrow width to i128, feeding
14671// into a BUILD_VECTOR of v1i128. Replace this sequence with a PPCISD node
14672// (LXVRZX). This node represents a zero extending load that will be matched
14673// to the Load VSX Vector Rightmost instructions.
14674static SDValue combineBVZEXTLOAD(SDNode *N, SelectionDAG &DAG) {
SDLoc DL(N);

// This combine is only eligible for a BUILD_VECTOR of v1i128.
if (N->getValueType(0) != MVT::v1i128)
  return SDValue();

SDValue Operand = N->getOperand(0);
// Proceed with the transformation if the operand to the BUILD_VECTOR
// is a load instruction.
if (Operand.getOpcode() != ISD::LOAD)
  return SDValue();

auto *LD = cast<LoadSDNode>(Operand);
EVT MemoryType = LD->getMemoryVT();

// This transformation is only valid if the we are loading either a byte,
// halfword, word, or doubleword.
bool ValidLDType = MemoryType == MVT::i8 || MemoryType == MVT::i16 ||
                   MemoryType == MVT::i32 || MemoryType == MVT::i64;

// Ensure that the load from the narrow width is being zero extended to i128.
if (!ValidLDType ||
    (LD->getExtensionType() != ISD::ZEXTLOAD &&
     LD->getExtensionType() != ISD::EXTLOAD))
  return SDValue();

SDValue LoadOps[] = {
    LD->getChain(), LD->getBasePtr(),
    DAG.getIntPtrConstant(MemoryType.getScalarSizeInBits(), DL)};

return DAG.getMemIntrinsicNode(PPCISD::LXVRZX, DL,
                               DAG.getVTList(MVT::v1i128, MVT::Other),
                               LoadOps, MemoryType, LD->getMemOperand());
14708}

14710SDValue PPCTargetLowering::DAGCombineBuildVector(SDNode *N,
                                               DAGCombinerInfo &DCI) const {
assert(N->getOpcode() == ISD::BUILD_VECTOR &&(static_cast <bool> (N->getOpcode() == ISD::BUILD_VECTOR
 && "Should be called with a BUILD_VECTOR node") ? void
 (0) : __assert_fail ("N->getOpcode() == ISD::BUILD_VECTOR && \"Should be called with a BUILD_VECTOR node\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14713, __extension__
 __PRETTY_FUNCTION__))
       "Should be called with a BUILD_VECTOR node")(static_cast <bool> (N->getOpcode() == ISD::BUILD_VECTOR
 && "Should be called with a BUILD_VECTOR node") ? void
 (0) : __assert_fail ("N->getOpcode() == ISD::BUILD_VECTOR && \"Should be called with a BUILD_VECTOR node\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14713, __extension__
 __PRETTY_FUNCTION__));

SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);

if (!Subtarget.hasVSX())
  return SDValue();

// The target independent DAG combiner will leave a build_vector of
// float-to-int conversions intact. We can generate MUCH better code for
// a float-to-int conversion of a vector of floats.
SDValue FirstInput = N->getOperand(0);
if (FirstInput.getOpcode() == PPCISD::MFVSR) {
  SDValue Reduced = combineElementTruncationToVectorTruncation(N, DCI);
  if (Reduced)
    return Reduced;
}

// If we're building a vector out of consecutive loads, just load that
// vector type.
SDValue Reduced = combineBVOfConsecutiveLoads(N, DAG);
if (Reduced)
  return Reduced;

// If we're building a vector out of extended elements from another vector
// we have P9 vector integer extend instructions. The code assumes legal
// input types (i.e. it can't handle things like v4i16) so do not run before
// legalization.
if (Subtarget.hasP9Altivec() && !DCI.isBeforeLegalize()) {
  Reduced = combineBVOfVecSExt(N, DAG);
  if (Reduced)
    return Reduced;
}

// On Power10, the Load VSX Vector Rightmost instructions can be utilized
// if this is a BUILD_VECTOR of v1i128, and if the operand to the BUILD_VECTOR
// is a load from <valid narrow width> to i128.
if (Subtarget.isISA3_1()) {
  SDValue BVOfZLoad = combineBVZEXTLOAD(N, DAG);
  if (BVOfZLoad)
    return BVOfZLoad;
}

if (N->getValueType(0) != MVT::v2f64)
  return SDValue();

// Looking for:
// (build_vector ([su]int_to_fp (extractelt 0)), [su]int_to_fp (extractelt 1))
if (FirstInput.getOpcode() != ISD::SINT_TO_FP &&
    FirstInput.getOpcode() != ISD::UINT_TO_FP)
  return SDValue();
if (N->getOperand(1).getOpcode() != ISD::SINT_TO_FP &&
    N->getOperand(1).getOpcode() != ISD::UINT_TO_FP)
  return SDValue();
if (FirstInput.getOpcode() != N->getOperand(1).getOpcode())
  return SDValue();

SDValue Ext1 = FirstInput.getOperand(0);
SDValue Ext2 = N->getOperand(1).getOperand(0);
if(Ext1.getOpcode() != ISD::EXTRACT_VECTOR_ELT ||
   Ext2.getOpcode() != ISD::EXTRACT_VECTOR_ELT)
  return SDValue();

ConstantSDNode *Ext1Op = dyn_cast<ConstantSDNode>(Ext1.getOperand(1));
ConstantSDNode *Ext2Op = dyn_cast<ConstantSDNode>(Ext2.getOperand(1));
if (!Ext1Op || !Ext2Op)
  return SDValue();
if (Ext1.getOperand(0).getValueType() != MVT::v4i32 ||
    Ext1.getOperand(0) != Ext2.getOperand(0))
  return SDValue();

int FirstElem = Ext1Op->getZExtValue();
int SecondElem = Ext2Op->getZExtValue();
int SubvecIdx;
if (FirstElem == 0 && SecondElem == 1)
  SubvecIdx = Subtarget.isLittleEndian() ? 1 : 0;
else if (FirstElem == 2 && SecondElem == 3)
  SubvecIdx = Subtarget.isLittleEndian() ? 0 : 1;
else
  return SDValue();

SDValue SrcVec = Ext1.getOperand(0);
auto NodeType = (N->getOperand(1).getOpcode() == ISD::SINT_TO_FP) ?
  PPCISD::SINT_VEC_TO_FP : PPCISD::UINT_VEC_TO_FP;
return DAG.getNode(NodeType, dl, MVT::v2f64,
                   SrcVec, DAG.getIntPtrConstant(SubvecIdx, dl));
14799}

14801SDValue PPCTargetLowering::combineFPToIntToFP(SDNode *N,
                                            DAGCombinerInfo &DCI) const {
assert((N->getOpcode() == ISD::SINT_TO_FP ||(static_cast <bool> ((N->getOpcode() == ISD::SINT_TO_FP
 || N->getOpcode() == ISD::UINT_TO_FP) && "Need an int -> FP conversion node here"
) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SINT_TO_FP || N->getOpcode() == ISD::UINT_TO_FP) && \"Need an int -> FP conversion node here\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14805, __extension__
 __PRETTY_FUNCTION__))
        N->getOpcode() == ISD::UINT_TO_FP) &&(static_cast <bool> ((N->getOpcode() == ISD::SINT_TO_FP
 || N->getOpcode() == ISD::UINT_TO_FP) && "Need an int -> FP conversion node here"
) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SINT_TO_FP || N->getOpcode() == ISD::UINT_TO_FP) && \"Need an int -> FP conversion node here\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14805, __extension__
 __PRETTY_FUNCTION__))
       "Need an int -> FP conversion node here")(static_cast <bool> ((N->getOpcode() == ISD::SINT_TO_FP
 || N->getOpcode() == ISD::UINT_TO_FP) && "Need an int -> FP conversion node here"
) ? void (0) : __assert_fail ("(N->getOpcode() == ISD::SINT_TO_FP || N->getOpcode() == ISD::UINT_TO_FP) && \"Need an int -> FP conversion node here\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14805, __extension__
 __PRETTY_FUNCTION__));

if (useSoftFloat() || !Subtarget.has64BitSupport())
  return SDValue();

SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);
SDValue Op(N, 0);

// Don't handle ppc_fp128 here or conversions that are out-of-range capable
// from the hardware.
if (Op.getValueType() != MVT::f32 && Op.getValueType() != MVT::f64)
  return SDValue();
if (!Op.getOperand(0).getValueType().isSimple())
  return SDValue();
if (Op.getOperand(0).getValueType().getSimpleVT() <= MVT(MVT::i1) ||
    Op.getOperand(0).getValueType().getSimpleVT() > MVT(MVT::i64))
  return SDValue();

SDValue FirstOperand(Op.getOperand(0));
bool SubWordLoad = FirstOperand.getOpcode() == ISD::LOAD &&
  (FirstOperand.getValueType() == MVT::i8 ||
   FirstOperand.getValueType() == MVT::i16);
if (Subtarget.hasP9Vector() && Subtarget.hasP9Altivec() && SubWordLoad) {
  bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
  bool DstDouble = Op.getValueType() == MVT::f64;
  unsigned ConvOp = Signed ?
    (DstDouble ? PPCISD::FCFID  : PPCISD::FCFIDS) :
    (DstDouble ? PPCISD::FCFIDU : PPCISD::FCFIDUS);
  SDValue WidthConst =
    DAG.getIntPtrConstant(FirstOperand.getValueType() == MVT::i8 ? 1 : 2,
                          dl, false);
  LoadSDNode *LDN = cast<LoadSDNode>(FirstOperand.getNode());
  SDValue Ops[] = { LDN->getChain(), LDN->getBasePtr(), WidthConst };
  SDValue Ld = DAG.getMemIntrinsicNode(PPCISD::LXSIZX, dl,
                                       DAG.getVTList(MVT::f64, MVT::Other),
                                       Ops, MVT::i8, LDN->getMemOperand());

  // For signed conversion, we need to sign-extend the value in the VSR
  if (Signed) {
    SDValue ExtOps[] = { Ld, WidthConst };
    SDValue Ext = DAG.getNode(PPCISD::VEXTS, dl, MVT::f64, ExtOps);
    return DAG.getNode(ConvOp, dl, DstDouble ? MVT::f64 : MVT::f32, Ext);
  } else
    return DAG.getNode(ConvOp, dl, DstDouble ? MVT::f64 : MVT::f32, Ld);
}


// For i32 intermediate values, unfortunately, the conversion functions
// leave the upper 32 bits of the value are undefined. Within the set of
// scalar instructions, we have no method for zero- or sign-extending the
// value. Thus, we cannot handle i32 intermediate values here.
if (Op.getOperand(0).getValueType() == MVT::i32)
  return SDValue();

assert((Op.getOpcode() == ISD::SINT_TO_FP || Subtarget.hasFPCVT()) &&(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP
 || Subtarget.hasFPCVT()) && "UINT_TO_FP is supported only with FPCVT"
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Subtarget.hasFPCVT()) && \"UINT_TO_FP is supported only with FPCVT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14861, __extension__
 __PRETTY_FUNCTION__))
       "UINT_TO_FP is supported only with FPCVT")(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP
 || Subtarget.hasFPCVT()) && "UINT_TO_FP is supported only with FPCVT"
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Subtarget.hasFPCVT()) && \"UINT_TO_FP is supported only with FPCVT\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14861, __extension__
 __PRETTY_FUNCTION__));

// If we have FCFIDS, then use it when converting to single-precision.
// Otherwise, convert to double-precision and then round.
unsigned FCFOp = (Subtarget.hasFPCVT() && Op.getValueType() == MVT::f32)
                     ? (Op.getOpcode() == ISD::UINT_TO_FP ? PPCISD::FCFIDUS
                                                          : PPCISD::FCFIDS)
                     : (Op.getOpcode() == ISD::UINT_TO_FP ? PPCISD::FCFIDU
                                                          : PPCISD::FCFID);
MVT FCFTy = (Subtarget.hasFPCVT() && Op.getValueType() == MVT::f32)
                ? MVT::f32
                : MVT::f64;

// If we're converting from a float, to an int, and back to a float again,
// then we don't need the store/load pair at all.
if ((Op.getOperand(0).getOpcode() == ISD::FP_TO_UINT &&
     Subtarget.hasFPCVT()) ||
    (Op.getOperand(0).getOpcode() == ISD::FP_TO_SINT)) {
  SDValue Src = Op.getOperand(0).getOperand(0);
  if (Src.getValueType() == MVT::f32) {
    Src = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Src);
    DCI.AddToWorklist(Src.getNode());
  } else if (Src.getValueType() != MVT::f64) {
    // Make sure that we don't pick up a ppc_fp128 source value.
    return SDValue();
  }

  unsigned FCTOp =
    Op.getOperand(0).getOpcode() == ISD::FP_TO_SINT ? PPCISD::FCTIDZ :
                                                      PPCISD::FCTIDUZ;

  SDValue Tmp = DAG.getNode(FCTOp, dl, MVT::f64, Src);
  SDValue FP = DAG.getNode(FCFOp, dl, FCFTy, Tmp);

  if (Op.getValueType() == MVT::f32 && !Subtarget.hasFPCVT()) {
    FP = DAG.getNode(ISD::FP_ROUND, dl, MVT::f32, FP,
                     DAG.getIntPtrConstant(0, dl, /*isTarget=*/true));
    DCI.AddToWorklist(FP.getNode());
  }

  return FP;
}

return SDValue();
14905}

14907// expandVSXLoadForLE - Convert VSX loads (which may be intrinsics for
14908// builtins) into loads with swaps.
14909SDValue PPCTargetLowering::expandVSXLoadForLE(SDNode *N,
                                            DAGCombinerInfo &DCI) const {
// Delay VSX load for LE combine until after LegalizeOps to prioritize other
// load combines.
if (DCI.isBeforeLegalizeOps())
  return SDValue();

SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);
SDValue Chain;
SDValue Base;
MachineMemOperand *MMO;

switch (N->getOpcode()) {
default:
  llvm_unreachable("Unexpected opcode for little endian VSX load")::llvm::llvm_unreachable_internal("Unexpected opcode for little endian VSX load"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14924);
case ISD::LOAD: {
  LoadSDNode *LD = cast<LoadSDNode>(N);
  Chain = LD->getChain();
  Base = LD->getBasePtr();
  MMO = LD->getMemOperand();
  // If the MMO suggests this isn't a load of a full vector, leave
  // things alone.  For a built-in, we have to make the change for
  // correctness, so if there is a size problem that will be a bug.
  if (MMO->getSize() < 16)
    return SDValue();
  break;
}
case ISD::INTRINSIC_W_CHAIN: {
  MemIntrinsicSDNode *Intrin = cast<MemIntrinsicSDNode>(N);
  Chain = Intrin->getChain();
  // Similarly to the store case below, Intrin->getBasePtr() doesn't get
  // us what we want. Get operand 2 instead.
  Base = Intrin->getOperand(2);
  MMO = Intrin->getMemOperand();
  break;
}
}

MVT VecTy = N->getValueType(0).getSimpleVT();

SDValue LoadOps[] = { Chain, Base };
SDValue Load = DAG.getMemIntrinsicNode(PPCISD::LXVD2X, dl,
                                       DAG.getVTList(MVT::v2f64, MVT::Other),
                                       LoadOps, MVT::v2f64, MMO);

DCI.AddToWorklist(Load.getNode());
Chain = Load.getValue(1);
SDValue Swap = DAG.getNode(
    PPCISD::XXSWAPD, dl, DAG.getVTList(MVT::v2f64, MVT::Other), Chain, Load);
DCI.AddToWorklist(Swap.getNode());

// Add a bitcast if the resulting load type doesn't match v2f64.
if (VecTy != MVT::v2f64) {
  SDValue N = DAG.getNode(ISD::BITCAST, dl, VecTy, Swap);
  DCI.AddToWorklist(N.getNode());
  // Package {bitcast value, swap's chain} to match Load's shape.
  return DAG.getNode(ISD::MERGE_VALUES, dl, DAG.getVTList(VecTy, MVT::Other),
                     N, Swap.getValue(1));
}

return Swap;
14971}

14973// expandVSXStoreForLE - Convert VSX stores (which may be intrinsics for
14974// builtins) into stores with swaps.
14975SDValue PPCTargetLowering::expandVSXStoreForLE(SDNode *N,
                                             DAGCombinerInfo &DCI) const {
// Delay VSX store for LE combine until after LegalizeOps to prioritize other
// store combines.
if (DCI.isBeforeLegalizeOps())
  return SDValue();

SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);
SDValue Chain;
SDValue Base;
unsigned SrcOpnd;
MachineMemOperand *MMO;

switch (N->getOpcode()) {
default:
  llvm_unreachable("Unexpected opcode for little endian VSX store")::llvm::llvm_unreachable_internal("Unexpected opcode for little endian VSX store"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 14991);
case ISD::STORE: {
  StoreSDNode *ST = cast<StoreSDNode>(N);
  Chain = ST->getChain();
  Base = ST->getBasePtr();
  MMO = ST->getMemOperand();
  SrcOpnd = 1;
  // If the MMO suggests this isn't a store of a full vector, leave
  // things alone.  For a built-in, we have to make the change for
  // correctness, so if there is a size problem that will be a bug.
  if (MMO->getSize() < 16)
    return SDValue();
  break;
}
case ISD::INTRINSIC_VOID: {
  MemIntrinsicSDNode *Intrin = cast<MemIntrinsicSDNode>(N);
  Chain = Intrin->getChain();
  // Intrin->getBasePtr() oddly does not get what we want.
  Base = Intrin->getOperand(3);
  MMO = Intrin->getMemOperand();
  SrcOpnd = 2;
  break;
}
}

SDValue Src = N->getOperand(SrcOpnd);
MVT VecTy = Src.getValueType().getSimpleVT();

// All stores are done as v2f64 and possible bit cast.
if (VecTy != MVT::v2f64) {
  Src = DAG.getNode(ISD::BITCAST, dl, MVT::v2f64, Src);
  DCI.AddToWorklist(Src.getNode());
}

SDValue Swap = DAG.getNode(PPCISD::XXSWAPD, dl,
                           DAG.getVTList(MVT::v2f64, MVT::Other), Chain, Src);
DCI.AddToWorklist(Swap.getNode());
Chain = Swap.getValue(1);
SDValue StoreOps[] = { Chain, Swap, Base };
SDValue Store = DAG.getMemIntrinsicNode(PPCISD::STXVD2X, dl,
                                        DAG.getVTList(MVT::Other),
                                        StoreOps, VecTy, MMO);
DCI.AddToWorklist(Store.getNode());
return Store;
15035}

15037// Handle DAG combine for STORE (FP_TO_INT F).
15038SDValue PPCTargetLowering::combineStoreFPToInt(SDNode *N,
                                             DAGCombinerInfo &DCI) const {

SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);
unsigned Opcode = N->getOperand(1).getOpcode();

assert((Opcode == ISD::FP_TO_SINT || Opcode == ISD::FP_TO_UINT)(static_cast <bool> ((Opcode == ISD::FP_TO_SINT || Opcode
 == ISD::FP_TO_UINT) && "Not a FP_TO_INT Instruction!"
) ? void (0) : __assert_fail ("(Opcode == ISD::FP_TO_SINT || Opcode == ISD::FP_TO_UINT) && \"Not a FP_TO_INT Instruction!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15046, __extension__
 __PRETTY_FUNCTION__))
       && "Not a FP_TO_INT Instruction!")(static_cast <bool> ((Opcode == ISD::FP_TO_SINT || Opcode
 == ISD::FP_TO_UINT) && "Not a FP_TO_INT Instruction!"
) ? void (0) : __assert_fail ("(Opcode == ISD::FP_TO_SINT || Opcode == ISD::FP_TO_UINT) && \"Not a FP_TO_INT Instruction!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15046, __extension__
 __PRETTY_FUNCTION__));

SDValue Val = N->getOperand(1).getOperand(0);
EVT Op1VT = N->getOperand(1).getValueType();
EVT ResVT = Val.getValueType();

if (!isTypeLegal(ResVT))
  return SDValue();

// Only perform combine for conversion to i64/i32 or power9 i16/i8.
bool ValidTypeForStoreFltAsInt =
      (Op1VT == MVT::i32 || Op1VT == MVT::i64 ||
       (Subtarget.hasP9Vector() && (Op1VT == MVT::i16 || Op1VT == MVT::i8)));

if (ResVT == MVT::f128 && !Subtarget.hasP9Vector())
  return SDValue();

if (ResVT == MVT::ppcf128 || !Subtarget.hasP8Vector() ||
    cast<StoreSDNode>(N)->isTruncatingStore() || !ValidTypeForStoreFltAsInt)
  return SDValue();

// Extend f32 values to f64
if (ResVT.getScalarSizeInBits() == 32) {
  Val = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Val);
  DCI.AddToWorklist(Val.getNode());
}

// Set signed or unsigned conversion opcode.
unsigned ConvOpcode = (Opcode == ISD::FP_TO_SINT) ?
                        PPCISD::FP_TO_SINT_IN_VSR :
                        PPCISD::FP_TO_UINT_IN_VSR;

Val = DAG.getNode(ConvOpcode,
                  dl, ResVT == MVT::f128 ? MVT::f128 : MVT::f64, Val);
DCI.AddToWorklist(Val.getNode());

// Set number of bytes being converted.
unsigned ByteSize = Op1VT.getScalarSizeInBits() / 8;
SDValue Ops[] = { N->getOperand(0), Val, N->getOperand(2),
                  DAG.getIntPtrConstant(ByteSize, dl, false),
                  DAG.getValueType(Op1VT) };

Val = DAG.getMemIntrinsicNode(PPCISD::ST_VSR_SCAL_INT, dl,
        DAG.getVTList(MVT::Other), Ops,
        cast<StoreSDNode>(N)->getMemoryVT(),
        cast<StoreSDNode>(N)->getMemOperand());

DCI.AddToWorklist(Val.getNode());
return Val;
15095}

15097static bool isAlternatingShuffMask(const ArrayRef<int> &Mask, int NumElts) {
// Check that the source of the element keeps flipping
// (i.e. Mask[i] < NumElts -> Mask[i+i] >= NumElts).
bool PrevElemFromFirstVec = Mask[0] < NumElts;
for (int i = 1, e = Mask.size(); i < e; i++) {
  if (PrevElemFromFirstVec && Mask[i] < NumElts)
    return false;
  if (!PrevElemFromFirstVec && Mask[i] >= NumElts)
    return false;
  PrevElemFromFirstVec = !PrevElemFromFirstVec;
}
return true;
15109}

15111static bool isSplatBV(SDValue Op) {
if (Op.getOpcode() != ISD::BUILD_VECTOR)
  return false;
SDValue FirstOp;

// Find first non-undef input.
for (int i = 0, e = Op.getNumOperands(); i < e; i++) {
  FirstOp = Op.getOperand(i);
  if (!FirstOp.isUndef())
    break;
}

// All inputs are undef or the same as the first non-undef input.
for (int i = 1, e = Op.getNumOperands(); i < e; i++)
  if (Op.getOperand(i) != FirstOp && !Op.getOperand(i).isUndef())
    return false;
return true;
15128}

15130static SDValue isScalarToVec(SDValue Op) {
if (Op.getOpcode() == ISD::SCALAR_TO_VECTOR)
  return Op;
if (Op.getOpcode() != ISD::BITCAST)
  return SDValue();
Op = Op.getOperand(0);
if (Op.getOpcode() == ISD::SCALAR_TO_VECTOR)
  return Op;
return SDValue();
15139}

15141// Fix up the shuffle mask to account for the fact that the result of
15142// scalar_to_vector is not in lane zero. This just takes all values in
15143// the ranges specified by the min/max indices and adds the number of
15144// elements required to ensure each element comes from the respective
15145// position in the valid lane.
15146// On little endian, that's just the corresponding element in the other
15147// half of the vector. On big endian, it is in the same half but right
15148// justified rather than left justified in that half.
15149static void fixupShuffleMaskForPermutedSToV(SmallVectorImpl<int> &ShuffV,
                                          int LHSMaxIdx, int RHSMinIdx,
                                          int RHSMaxIdx, int HalfVec,
                                          unsigned ValidLaneWidth,
                                          const PPCSubtarget &Subtarget) {
for (int i = 0, e = ShuffV.size(); i < e; i++) {
  int Idx = ShuffV[i];
  if ((Idx >= 0 && Idx < LHSMaxIdx) || (Idx >= RHSMinIdx && Idx < RHSMaxIdx))
    ShuffV[i] +=
        Subtarget.isLittleEndian() ? HalfVec : HalfVec - ValidLaneWidth;
}
15160}

15162// Replace a SCALAR_TO_VECTOR with a SCALAR_TO_VECTOR_PERMUTED except if
15163// the original is:
15164// (<n x Ty> (scalar_to_vector (Ty (extract_elt <n x Ty> %a, C))))
15165// In such a case, just change the shuffle mask to extract the element
15166// from the permuted index.
15167static SDValue getSToVPermuted(SDValue OrigSToV, SelectionDAG &DAG,
                             const PPCSubtarget &Subtarget) {
SDLoc dl(OrigSToV);
EVT VT = OrigSToV.getValueType();
assert(OrigSToV.getOpcode() == ISD::SCALAR_TO_VECTOR &&(static_cast <bool> (OrigSToV.getOpcode() == ISD::SCALAR_TO_VECTOR
 && "Expecting a SCALAR_TO_VECTOR here") ? void (0) :
 __assert_fail ("OrigSToV.getOpcode() == ISD::SCALAR_TO_VECTOR && \"Expecting a SCALAR_TO_VECTOR here\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15172, __extension__
 __PRETTY_FUNCTION__))
       "Expecting a SCALAR_TO_VECTOR here")(static_cast <bool> (OrigSToV.getOpcode() == ISD::SCALAR_TO_VECTOR
 && "Expecting a SCALAR_TO_VECTOR here") ? void (0) :
 __assert_fail ("OrigSToV.getOpcode() == ISD::SCALAR_TO_VECTOR && \"Expecting a SCALAR_TO_VECTOR here\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15172, __extension__
 __PRETTY_FUNCTION__));
SDValue Input = OrigSToV.getOperand(0);

if (Input.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
  ConstantSDNode *Idx = dyn_cast<ConstantSDNode>(Input.getOperand(1));
  SDValue OrigVector = Input.getOperand(0);

  // Can't handle non-const element indices or different vector types
  // for the input to the extract and the output of the scalar_to_vector.
  if (Idx && VT == OrigVector.getValueType()) {
    unsigned NumElts = VT.getVectorNumElements();
    assert((static_cast <bool> (NumElts > 1 && "Cannot produce a permuted scalar_to_vector for one element vector"
) ? void (0) : __assert_fail ("NumElts > 1 && \"Cannot produce a permuted scalar_to_vector for one element vector\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15185, __extension__
 __PRETTY_FUNCTION__))
        NumElts > 1 &&(static_cast <bool> (NumElts > 1 && "Cannot produce a permuted scalar_to_vector for one element vector"
) ? void (0) : __assert_fail ("NumElts > 1 && \"Cannot produce a permuted scalar_to_vector for one element vector\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15185, __extension__
 __PRETTY_FUNCTION__))
        "Cannot produce a permuted scalar_to_vector for one element vector")(static_cast <bool> (NumElts > 1 && "Cannot produce a permuted scalar_to_vector for one element vector"
) ? void (0) : __assert_fail ("NumElts > 1 && \"Cannot produce a permuted scalar_to_vector for one element vector\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15185, __extension__
 __PRETTY_FUNCTION__));
    SmallVector<int, 16> NewMask(NumElts, -1);
    unsigned ResultInElt = NumElts / 2;
    ResultInElt -= Subtarget.isLittleEndian() ? 0 : 1;
    NewMask[ResultInElt] = Idx->getZExtValue();
    return DAG.getVectorShuffle(VT, dl, OrigVector, OrigVector, NewMask);
  }
}
return DAG.getNode(PPCISD::SCALAR_TO_VECTOR_PERMUTED, dl, VT,
                   OrigSToV.getOperand(0));
15195}

15197// On little endian subtargets, combine shuffles such as:
15198// vector_shuffle<16,1,17,3,18,5,19,7,20,9,21,11,22,13,23,15>, <zero>, %b
15199// into:
15200// vector_shuffle<16,0,17,1,18,2,19,3,20,4,21,5,22,6,23,7>, <zero>, %b
15201// because the latter can be matched to a single instruction merge.
15202// Furthermore, SCALAR_TO_VECTOR on little endian always involves a permute
15203// to put the value into element zero. Adjust the shuffle mask so that the
15204// vector can remain in permuted form (to prevent a swap prior to a shuffle).
15205// On big endian targets, this is still useful for SCALAR_TO_VECTOR
15206// nodes with elements smaller than doubleword because all the ways
15207// of getting scalar data into a vector register put the value in the
15208// rightmost element of the left half of the vector.
15209SDValue PPCTargetLowering::combineVectorShuffle(ShuffleVectorSDNode *SVN,
                                              SelectionDAG &DAG) const {
SDValue LHS = SVN->getOperand(0);
SDValue RHS = SVN->getOperand(1);
auto Mask = SVN->getMask();
int NumElts = LHS.getValueType().getVectorNumElements();
SDValue Res(SVN, 0);
SDLoc dl(SVN);
bool IsLittleEndian = Subtarget.isLittleEndian();

// On big endian targets this is only useful for subtargets with direct moves.
// On little endian targets it would be useful for all subtargets with VSX.
// However adding special handling for LE subtargets without direct moves
// would be wasted effort since the minimum arch for LE is ISA 2.07 (Power8)
// which includes direct moves.
if (!Subtarget.hasDirectMove())
  return Res;

// If this is not a shuffle of a shuffle and the first element comes from
// the second vector, canonicalize to the commuted form. This will make it
// more likely to match one of the single instruction patterns.
if (Mask[0] >= NumElts && LHS.getOpcode() != ISD::VECTOR_SHUFFLE &&
    RHS.getOpcode() != ISD::VECTOR_SHUFFLE) {
  std::swap(LHS, RHS);
  Res = DAG.getCommutedVectorShuffle(*SVN);
  Mask = cast<ShuffleVectorSDNode>(Res)->getMask();
}

// Adjust the shuffle mask if either input vector comes from a
// SCALAR_TO_VECTOR and keep the respective input vector in permuted
// form (to prevent the need for a swap).
SmallVector<int, 16> ShuffV(Mask);
SDValue SToVLHS = isScalarToVec(LHS);
SDValue SToVRHS = isScalarToVec(RHS);
if (SToVLHS || SToVRHS) {
  // FIXME: If both LHS and RHS are SCALAR_TO_VECTOR, but are not the
  // same type and have differing element sizes, then do not perform
  // the following transformation. The current transformation for
  // SCALAR_TO_VECTOR assumes that both input vectors have the same
  // element size. This will be updated in the future to account for
  // differing sizes of the LHS and RHS.
  if (SToVLHS && SToVRHS &&
      (SToVLHS.getValueType().getScalarSizeInBits() !=
       SToVRHS.getValueType().getScalarSizeInBits()))
    return Res;

  int NumEltsIn = SToVLHS ? SToVLHS.getValueType().getVectorNumElements()
                          : SToVRHS.getValueType().getVectorNumElements();
  int NumEltsOut = ShuffV.size();
  // The width of the "valid lane" (i.e. the lane that contains the value that
  // is vectorized) needs to be expressed in terms of the number of elements
  // of the shuffle. It is thereby the ratio of the values before and after
  // any bitcast.
  unsigned ValidLaneWidth =
      SToVLHS ? SToVLHS.getValueType().getScalarSizeInBits() /
                    LHS.getValueType().getScalarSizeInBits()
              : SToVRHS.getValueType().getScalarSizeInBits() /
                    RHS.getValueType().getScalarSizeInBits();

  // Initially assume that neither input is permuted. These will be adjusted
  // accordingly if either input is.
  int LHSMaxIdx = -1;
  int RHSMinIdx = -1;
  int RHSMaxIdx = -1;
  int HalfVec = LHS.getValueType().getVectorNumElements() / 2;

  // Get the permuted scalar to vector nodes for the source(s) that come from
  // ISD::SCALAR_TO_VECTOR.
  // On big endian systems, this only makes sense for element sizes smaller
  // than 64 bits since for 64-bit elements, all instructions already put
  // the value into element zero. Since scalar size of LHS and RHS may differ
  // after isScalarToVec, this should be checked using their own sizes.
  if (SToVLHS) {
    if (!IsLittleEndian && SToVLHS.getValueType().getScalarSizeInBits() >= 64)
      return Res;
    // Set up the values for the shuffle vector fixup.
    LHSMaxIdx = NumEltsOut / NumEltsIn;
    SToVLHS = getSToVPermuted(SToVLHS, DAG, Subtarget);
    if (SToVLHS.getValueType() != LHS.getValueType())
      SToVLHS = DAG.getBitcast(LHS.getValueType(), SToVLHS);
    LHS = SToVLHS;
  }
  if (SToVRHS) {
    if (!IsLittleEndian && SToVRHS.getValueType().getScalarSizeInBits() >= 64)
      return Res;
    RHSMinIdx = NumEltsOut;
    RHSMaxIdx = NumEltsOut / NumEltsIn + RHSMinIdx;
    SToVRHS = getSToVPermuted(SToVRHS, DAG, Subtarget);
    if (SToVRHS.getValueType() != RHS.getValueType())
      SToVRHS = DAG.getBitcast(RHS.getValueType(), SToVRHS);
    RHS = SToVRHS;
  }

  // Fix up the shuffle mask to reflect where the desired element actually is.
  // The minimum and maximum indices that correspond to element zero for both
  // the LHS and RHS are computed and will control which shuffle mask entries
  // are to be changed. For example, if the RHS is permuted, any shuffle mask
  // entries in the range [RHSMinIdx,RHSMaxIdx) will be adjusted.
  fixupShuffleMaskForPermutedSToV(ShuffV, LHSMaxIdx, RHSMinIdx, RHSMaxIdx,
                                  HalfVec, ValidLaneWidth, Subtarget);
  Res = DAG.getVectorShuffle(SVN->getValueType(0), dl, LHS, RHS, ShuffV);

  // We may have simplified away the shuffle. We won't be able to do anything
  // further with it here.
  if (!isa<ShuffleVectorSDNode>(Res))
    return Res;
  Mask = cast<ShuffleVectorSDNode>(Res)->getMask();
}

SDValue TheSplat = IsLittleEndian ? RHS : LHS;
// The common case after we commuted the shuffle is that the RHS is a splat
// and we have elements coming in from the splat at indices that are not
// conducive to using a merge.
// Example:
// vector_shuffle<0,17,1,19,2,21,3,23,4,25,5,27,6,29,7,31> t1, <zero>
if (!isSplatBV(TheSplat))
  return Res;

// We are looking for a mask such that all even elements are from
// one vector and all odd elements from the other.
if (!isAlternatingShuffMask(Mask, NumElts))
  return Res;

// Adjust the mask so we are pulling in the same index from the splat
// as the index from the interesting vector in consecutive elements.
if (IsLittleEndian) {
  // Example (even elements from first vector):
  // vector_shuffle<0,16,1,17,2,18,3,19,4,20,5,21,6,22,7,23> t1, <zero>
  if (Mask[0] < NumElts)
    for (int i = 1, e = Mask.size(); i < e; i += 2) {
      if (ShuffV[i] < 0)
        continue;
      ShuffV[i] = (ShuffV[i - 1] + NumElts);
    }
  // Example (odd elements from first vector):
  // vector_shuffle<16,0,17,1,18,2,19,3,20,4,21,5,22,6,23,7> t1, <zero>
  else
    for (int i = 0, e = Mask.size(); i < e; i += 2) {
      if (ShuffV[i] < 0)
        continue;
      ShuffV[i] = (ShuffV[i + 1] + NumElts);
    }
} else {
  // Example (even elements from first vector):
  // vector_shuffle<0,16,1,17,2,18,3,19,4,20,5,21,6,22,7,23> <zero>, t1
  if (Mask[0] < NumElts)
    for (int i = 0, e = Mask.size(); i < e; i += 2) {
      if (ShuffV[i] < 0)
        continue;
      ShuffV[i] = ShuffV[i + 1] - NumElts;
    }
  // Example (odd elements from first vector):
  // vector_shuffle<16,0,17,1,18,2,19,3,20,4,21,5,22,6,23,7> <zero>, t1
  else
    for (int i = 1, e = Mask.size(); i < e; i += 2) {
      if (ShuffV[i] < 0)
        continue;
      ShuffV[i] = ShuffV[i - 1] - NumElts;
    }
}

// If the RHS has undefs, we need to remove them since we may have created
// a shuffle that adds those instead of the splat value.
SDValue SplatVal =
    cast<BuildVectorSDNode>(TheSplat.getNode())->getSplatValue();
TheSplat = DAG.getSplatBuildVector(TheSplat.getValueType(), dl, SplatVal);

if (IsLittleEndian)
  RHS = TheSplat;
else
  LHS = TheSplat;
return DAG.getVectorShuffle(SVN->getValueType(0), dl, LHS, RHS, ShuffV);
15381}

15383SDValue PPCTargetLowering::combineVReverseMemOP(ShuffleVectorSDNode *SVN,
                                              LSBaseSDNode *LSBase,
                                              DAGCombinerInfo &DCI) const {
assert((ISD::isNormalLoad(LSBase) || ISD::isNormalStore(LSBase)) &&(static_cast <bool> ((ISD::isNormalLoad(LSBase) || ISD::
isNormalStore(LSBase)) && "Not a reverse memop pattern!"
) ? void (0) : __assert_fail ("(ISD::isNormalLoad(LSBase) || ISD::isNormalStore(LSBase)) && \"Not a reverse memop pattern!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15387, __extension__
 __PRETTY_FUNCTION__))
      "Not a reverse memop pattern!")(static_cast <bool> ((ISD::isNormalLoad(LSBase) || ISD::
isNormalStore(LSBase)) && "Not a reverse memop pattern!"
) ? void (0) : __assert_fail ("(ISD::isNormalLoad(LSBase) || ISD::isNormalStore(LSBase)) && \"Not a reverse memop pattern!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15387, __extension__
 __PRETTY_FUNCTION__));

auto IsElementReverse = [](const ShuffleVectorSDNode *SVN) -> bool {
  auto Mask = SVN->getMask();
  int i = 0;
  auto I = Mask.rbegin();
  auto E = Mask.rend();

  for (; I != E; ++I) {
    if (*I != i)
      return false;
    i++;
  }
  return true;
};

SelectionDAG &DAG = DCI.DAG;
EVT VT = SVN->getValueType(0);

if (!isTypeLegal(VT) || !Subtarget.isLittleEndian() || !Subtarget.hasVSX())
  return SDValue();

// Before P9, we have PPCVSXSwapRemoval pass to hack the element order.
// See comment in PPCVSXSwapRemoval.cpp.
// It is conflict with PPCVSXSwapRemoval opt. So we don't do it.
if (!Subtarget.hasP9Vector())
  return SDValue();

if(!IsElementReverse(SVN))
  return SDValue();

if (LSBase->getOpcode() == ISD::LOAD) {
  // If the load return value 0 has more than one user except the
  // shufflevector instruction, it is not profitable to replace the
  // shufflevector with a reverse load.
  for (SDNode::use_iterator UI = LSBase->use_begin(), UE = LSBase->use_end();
       UI != UE; ++UI)
    if (UI.getUse().getResNo() == 0 && UI->getOpcode() != ISD::VECTOR_SHUFFLE)
      return SDValue();

  SDLoc dl(LSBase);
  SDValue LoadOps[] = {LSBase->getChain(), LSBase->getBasePtr()};
  return DAG.getMemIntrinsicNode(
      PPCISD::LOAD_VEC_BE, dl, DAG.getVTList(VT, MVT::Other), LoadOps,
      LSBase->getMemoryVT(), LSBase->getMemOperand());
}

if (LSBase->getOpcode() == ISD::STORE) {
  // If there are other uses of the shuffle, the swap cannot be avoided.
  // Forcing the use of an X-Form (since swapped stores only have
  // X-Forms) without removing the swap is unprofitable.
  if (!SVN->hasOneUse())
    return SDValue();

  SDLoc dl(LSBase);
  SDValue StoreOps[] = {LSBase->getChain(), SVN->getOperand(0),
                        LSBase->getBasePtr()};
  return DAG.getMemIntrinsicNode(
      PPCISD::STORE_VEC_BE, dl, DAG.getVTList(MVT::Other), StoreOps,
      LSBase->getMemoryVT(), LSBase->getMemOperand());
}

llvm_unreachable("Expected a load or store node here")::llvm::llvm_unreachable_internal("Expected a load or store node here"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15449);
15450}

15452static bool isStoreConditional(SDValue Intrin, unsigned &StoreWidth) {
unsigned IntrinsicID =
    cast<ConstantSDNode>(Intrin.getOperand(1))->getZExtValue();
if (IntrinsicID == Intrinsic::ppc_stdcx)
  StoreWidth = 8;
else if (IntrinsicID == Intrinsic::ppc_stwcx)
  StoreWidth = 4;
else if (IntrinsicID == Intrinsic::ppc_sthcx)
  StoreWidth = 2;
else if (IntrinsicID == Intrinsic::ppc_stbcx)
  StoreWidth = 1;
else
  return false;
return true;
15466}

15468SDValue PPCTargetLowering::PerformDAGCombine(SDNode *N,
                                           DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;
SDLoc dl(N);
switch (N->getOpcode()) {
default: break;
case ISD::ADD:
  return combineADD(N, DCI);
case ISD::SHL:
  return combineSHL(N, DCI);
case ISD::SRA:
  return combineSRA(N, DCI);
case ISD::SRL:
  return combineSRL(N, DCI);
case ISD::MUL:
  return combineMUL(N, DCI);
case ISD::FMA:
case PPCISD::FNMSUB:
  return combineFMALike(N, DCI);
case PPCISD::SHL:
  if (isNullConstant(N->getOperand(0))) // 0 << V -> 0.
      return N->getOperand(0);
  break;
case PPCISD::SRL:
  if (isNullConstant(N->getOperand(0))) // 0 >>u V -> 0.
      return N->getOperand(0);
  break;
case PPCISD::SRA:
  if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(0))) {
    if (C->isZero() ||  //  0 >>s V -> 0.
        C->isAllOnes()) // -1 >>s V -> -1.
      return N->getOperand(0);
  }
  break;
case ISD::SIGN_EXTEND:
case ISD::ZERO_EXTEND:
case ISD::ANY_EXTEND:
  return DAGCombineExtBoolTrunc(N, DCI);
case ISD::TRUNCATE:
  return combineTRUNCATE(N, DCI);
case ISD::SETCC:
  if (SDValue CSCC = combineSetCC(N, DCI))
    return CSCC;
  [[fallthrough]];
case ISD::SELECT_CC:
  return DAGCombineTruncBoolExt(N, DCI);
case ISD::SINT_TO_FP:
case ISD::UINT_TO_FP:
  return combineFPToIntToFP(N, DCI);
case ISD::VECTOR_SHUFFLE:
  if (ISD::isNormalLoad(N->getOperand(0).getNode())) {
    LSBaseSDNode* LSBase = cast<LSBaseSDNode>(N->getOperand(0));
    return combineVReverseMemOP(cast<ShuffleVectorSDNode>(N), LSBase, DCI);
  }
  return combineVectorShuffle(cast<ShuffleVectorSDNode>(N), DCI.DAG);
case ISD::STORE: {

  EVT Op1VT = N->getOperand(1).getValueType();
  unsigned Opcode = N->getOperand(1).getOpcode();

  if (Opcode == ISD::FP_TO_SINT || Opcode == ISD::FP_TO_UINT) {
    SDValue Val= combineStoreFPToInt(N, DCI);
    if (Val)
      return Val;
  }

  if (Opcode == ISD::VECTOR_SHUFFLE && ISD::isNormalStore(N)) {
    ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N->getOperand(1));
    SDValue Val= combineVReverseMemOP(SVN, cast<LSBaseSDNode>(N), DCI);
    if (Val)
      return Val;
  }

  // Turn STORE (BSWAP) -> sthbrx/stwbrx.
  if (cast<StoreSDNode>(N)->isUnindexed() && Opcode == ISD::BSWAP &&
      N->getOperand(1).getNode()->hasOneUse() &&
      (Op1VT == MVT::i32 || Op1VT == MVT::i16 ||
       (Subtarget.hasLDBRX() && Subtarget.isPPC64() && Op1VT == MVT::i64))) {

    // STBRX can only handle simple types and it makes no sense to store less
    // two bytes in byte-reversed order.
    EVT mVT = cast<StoreSDNode>(N)->getMemoryVT();
    if (mVT.isExtended() || mVT.getSizeInBits() < 16)
      break;

    SDValue BSwapOp = N->getOperand(1).getOperand(0);
    // Do an any-extend to 32-bits if this is a half-word input.
    if (BSwapOp.getValueType() == MVT::i16)
      BSwapOp = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, BSwapOp);

    // If the type of BSWAP operand is wider than stored memory width
    // it need to be shifted to the right side before STBRX.
    if (Op1VT.bitsGT(mVT)) {
      int Shift = Op1VT.getSizeInBits() - mVT.getSizeInBits();
      BSwapOp = DAG.getNode(ISD::SRL, dl, Op1VT, BSwapOp,
                            DAG.getConstant(Shift, dl, MVT::i32));
      // Need to truncate if this is a bswap of i64 stored as i32/i16.
      if (Op1VT == MVT::i64)
        BSwapOp = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, BSwapOp);
    }

    SDValue Ops[] = {
      N->getOperand(0), BSwapOp, N->getOperand(2), DAG.getValueType(mVT)
    };
    return
      DAG.getMemIntrinsicNode(PPCISD::STBRX, dl, DAG.getVTList(MVT::Other),
                              Ops, cast<StoreSDNode>(N)->getMemoryVT(),
                              cast<StoreSDNode>(N)->getMemOperand());
  }

  // STORE Constant:i32<0>  ->  STORE<trunc to i32> Constant:i64<0>
  // So it can increase the chance of CSE constant construction.
  if (Subtarget.isPPC64() && !DCI.isBeforeLegalize() &&
      isa<ConstantSDNode>(N->getOperand(1)) && Op1VT == MVT::i32) {
    // Need to sign-extended to 64-bits to handle negative values.
    EVT MemVT = cast<StoreSDNode>(N)->getMemoryVT();
    uint64_t Val64 = SignExtend64(N->getConstantOperandVal(1),
                                  MemVT.getSizeInBits());
    SDValue Const64 = DAG.getConstant(Val64, dl, MVT::i64);

    // DAG.getTruncStore() can't be used here because it doesn't accept
    // the general (base + offset) addressing mode.
    // So we use UpdateNodeOperands and setTruncatingStore instead.
    DAG.UpdateNodeOperands(N, N->getOperand(0), Const64, N->getOperand(2),
                           N->getOperand(3));
    cast<StoreSDNode>(N)->setTruncatingStore(true);
    return SDValue(N, 0);
  }

  // For little endian, VSX stores require generating xxswapd/lxvd2x.
  // Not needed on ISA 3.0 based CPUs since we have a non-permuting store.
  if (Op1VT.isSimple()) {
    MVT StoreVT = Op1VT.getSimpleVT();
    if (Subtarget.needsSwapsForVSXMemOps() &&
        (StoreVT == MVT::v2f64 || StoreVT == MVT::v2i64 ||
         StoreVT == MVT::v4f32 || StoreVT == MVT::v4i32))
      return expandVSXStoreForLE(N, DCI);
  }
  break;
}
case ISD::LOAD: {
  LoadSDNode *LD = cast<LoadSDNode>(N);
  EVT VT = LD->getValueType(0);

  // For little endian, VSX loads require generating lxvd2x/xxswapd.
  // Not needed on ISA 3.0 based CPUs since we have a non-permuting load.
  if (VT.isSimple()) {
    MVT LoadVT = VT.getSimpleVT();
    if (Subtarget.needsSwapsForVSXMemOps() &&
        (LoadVT == MVT::v2f64 || LoadVT == MVT::v2i64 ||
         LoadVT == MVT::v4f32 || LoadVT == MVT::v4i32))
      return expandVSXLoadForLE(N, DCI);
  }

  // We sometimes end up with a 64-bit integer load, from which we extract
  // two single-precision floating-point numbers. This happens with
  // std::complex<float>, and other similar structures, because of the way we
  // canonicalize structure copies. However, if we lack direct moves,
  // then the final bitcasts from the extracted integer values to the
  // floating-point numbers turn into store/load pairs. Even with direct moves,
  // just loading the two floating-point numbers is likely better.
  auto ReplaceTwoFloatLoad = [&]() {
    if (VT != MVT::i64)
      return false;

    if (LD->getExtensionType() != ISD::NON_EXTLOAD ||
        LD->isVolatile())
      return false;

    //  We're looking for a sequence like this:
    //  t13: i64,ch = load<LD8[%ref.tmp]> t0, t6, undef:i64
    //      t16: i64 = srl t13, Constant:i32<32>
    //    t17: i32 = truncate t16
    //  t18: f32 = bitcast t17
    //    t19: i32 = truncate t13
    //  t20: f32 = bitcast t19

    if (!LD->hasNUsesOfValue(2, 0))
      return false;

    auto UI = LD->use_begin();
    while (UI.getUse().getResNo() != 0) ++UI;
    SDNode *Trunc = *UI++;
    while (UI.getUse().getResNo() != 0) ++UI;
    SDNode *RightShift = *UI;
    if (Trunc->getOpcode() != ISD::TRUNCATE)
      std::swap(Trunc, RightShift);

    if (Trunc->getOpcode() != ISD::TRUNCATE ||
        Trunc->getValueType(0) != MVT::i32 ||
        !Trunc->hasOneUse())
      return false;
    if (RightShift->getOpcode() != ISD::SRL ||
        !isa<ConstantSDNode>(RightShift->getOperand(1)) ||
        RightShift->getConstantOperandVal(1) != 32 ||
        !RightShift->hasOneUse())
      return false;

    SDNode *Trunc2 = *RightShift->use_begin();
    if (Trunc2->getOpcode() != ISD::TRUNCATE ||
        Trunc2->getValueType(0) != MVT::i32 ||
        !Trunc2->hasOneUse())
      return false;

    SDNode *Bitcast = *Trunc->use_begin();
    SDNode *Bitcast2 = *Trunc2->use_begin();

    if (Bitcast->getOpcode() != ISD::BITCAST ||
        Bitcast->getValueType(0) != MVT::f32)
      return false;
    if (Bitcast2->getOpcode() != ISD::BITCAST ||
        Bitcast2->getValueType(0) != MVT::f32)
      return false;

    if (Subtarget.isLittleEndian())
      std::swap(Bitcast, Bitcast2);

    // Bitcast has the second float (in memory-layout order) and Bitcast2
    // has the first one.

    SDValue BasePtr = LD->getBasePtr();
    if (LD->isIndexed()) {
      assert(LD->getAddressingMode() == ISD::PRE_INC &&(static_cast <bool> (LD->getAddressingMode() == ISD::
PRE_INC && "Non-pre-inc AM on PPC?") ? void (0) : __assert_fail
 ("LD->getAddressingMode() == ISD::PRE_INC && \"Non-pre-inc AM on PPC?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15691, __extension__
 __PRETTY_FUNCTION__))
             "Non-pre-inc AM on PPC?")(static_cast <bool> (LD->getAddressingMode() == ISD::
PRE_INC && "Non-pre-inc AM on PPC?") ? void (0) : __assert_fail
 ("LD->getAddressingMode() == ISD::PRE_INC && \"Non-pre-inc AM on PPC?\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 15691, __extension__
 __PRETTY_FUNCTION__));
      BasePtr =
        DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
                    LD->getOffset());
    }

    auto MMOFlags =
        LD->getMemOperand()->getFlags() & ~MachineMemOperand::MOVolatile;
    SDValue FloatLoad = DAG.getLoad(MVT::f32, dl, LD->getChain(), BasePtr,
                                    LD->getPointerInfo(), LD->getAlign(),
                                    MMOFlags, LD->getAAInfo());
    SDValue AddPtr =
      DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(),
                  BasePtr, DAG.getIntPtrConstant(4, dl));
    SDValue FloatLoad2 = DAG.getLoad(
        MVT::f32, dl, SDValue(FloatLoad.getNode(), 1), AddPtr,
        LD->getPointerInfo().getWithOffset(4),
        commonAlignment(LD->getAlign(), 4), MMOFlags, LD->getAAInfo());

    if (LD->isIndexed()) {
      // Note that DAGCombine should re-form any pre-increment load(s) from
      // what is produced here if that makes sense.
      DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), BasePtr);
    }

    DCI.CombineTo(Bitcast2, FloatLoad);
    DCI.CombineTo(Bitcast, FloatLoad2);

    DAG.ReplaceAllUsesOfValueWith(SDValue(LD, LD->isIndexed() ? 2 : 1),
                                  SDValue(FloatLoad2.getNode(), 1));
    return true;
  };

  if (ReplaceTwoFloatLoad())
    return SDValue(N, 0);

  EVT MemVT = LD->getMemoryVT();
  Type *Ty = MemVT.getTypeForEVT(*DAG.getContext());
  Align ABIAlignment = DAG.getDataLayout().getABITypeAlign(Ty);
  if (LD->isUnindexed() && VT.isVector() &&
      ((Subtarget.hasAltivec() && ISD::isNON_EXTLoad(N) &&
        // P8 and later hardware should just use LOAD.
        !Subtarget.hasP8Vector() &&
        (VT == MVT::v16i8 || VT == MVT::v8i16 || VT == MVT::v4i32 ||
         VT == MVT::v4f32))) &&
      LD->getAlign() < ABIAlignment) {
    // This is a type-legal unaligned Altivec load.
    SDValue Chain = LD->getChain();
    SDValue Ptr = LD->getBasePtr();
    bool isLittleEndian = Subtarget.isLittleEndian();

    // This implements the loading of unaligned vectors as described in
    // the venerable Apple Velocity Engine overview. Specifically:
    // https://developer.apple.com/hardwaredrivers/ve/alignment.html
    // https://developer.apple.com/hardwaredrivers/ve/code_optimization.html
    //
    // The general idea is to expand a sequence of one or more unaligned
    // loads into an alignment-based permutation-control instruction (lvsl
    // or lvsr), a series of regular vector loads (which always truncate
    // their input address to an aligned address), and a series of
    // permutations.  The results of these permutations are the requested
    // loaded values.  The trick is that the last "extra" load is not taken
    // from the address you might suspect (sizeof(vector) bytes after the
    // last requested load), but rather sizeof(vector) - 1 bytes after the
    // last requested vector. The point of this is to avoid a page fault if
    // the base address happened to be aligned. This works because if the
    // base address is aligned, then adding less than a full vector length
    // will cause the last vector in the sequence to be (re)loaded.
    // Otherwise, the next vector will be fetched as you might suspect was
    // necessary.

    // We might be able to reuse the permutation generation from
    // a different base address offset from this one by an aligned amount.
    // The INTRINSIC_WO_CHAIN DAG combine will attempt to perform this
    // optimization later.
    Intrinsic::ID Intr, IntrLD, IntrPerm;
    MVT PermCntlTy, PermTy, LDTy;
    Intr = isLittleEndian ? Intrinsic::ppc_altivec_lvsr
                          : Intrinsic::ppc_altivec_lvsl;
    IntrLD = Intrinsic::ppc_altivec_lvx;
    IntrPerm = Intrinsic::ppc_altivec_vperm;
    PermCntlTy = MVT::v16i8;
    PermTy = MVT::v4i32;
    LDTy = MVT::v4i32;

    SDValue PermCntl = BuildIntrinsicOp(Intr, Ptr, DAG, dl, PermCntlTy);

    // Create the new MMO for the new base load. It is like the original MMO,
    // but represents an area in memory almost twice the vector size centered
    // on the original address. If the address is unaligned, we might start
    // reading up to (sizeof(vector)-1) bytes below the address of the
    // original unaligned load.
    MachineFunction &MF = DAG.getMachineFunction();
    MachineMemOperand *BaseMMO =
      MF.getMachineMemOperand(LD->getMemOperand(),
                              -(int64_t)MemVT.getStoreSize()+1,
                              2*MemVT.getStoreSize()-1);

    // Create the new base load.
    SDValue LDXIntID =
        DAG.getTargetConstant(IntrLD, dl, getPointerTy(MF.getDataLayout()));
    SDValue BaseLoadOps[] = { Chain, LDXIntID, Ptr };
    SDValue BaseLoad =
      DAG.getMemIntrinsicNode(ISD::INTRINSIC_W_CHAIN, dl,
                              DAG.getVTList(PermTy, MVT::Other),
                              BaseLoadOps, LDTy, BaseMMO);

    // Note that the value of IncOffset (which is provided to the next
    // load's pointer info offset value, and thus used to calculate the
    // alignment), and the value of IncValue (which is actually used to
    // increment the pointer value) are different! This is because we
    // require the next load to appear to be aligned, even though it
    // is actually offset from the base pointer by a lesser amount.
    int IncOffset = VT.getSizeInBits() / 8;
    int IncValue = IncOffset;

    // Walk (both up and down) the chain looking for another load at the real
    // (aligned) offset (the alignment of the other load does not matter in
    // this case). If found, then do not use the offset reduction trick, as
    // that will prevent the loads from being later combined (as they would
    // otherwise be duplicates).
    if (!findConsecutiveLoad(LD, DAG))
      --IncValue;

    SDValue Increment =
        DAG.getConstant(IncValue, dl, getPointerTy(MF.getDataLayout()));
    Ptr = DAG.getNode(ISD::ADD, dl, Ptr.getValueType(), Ptr, Increment);

    MachineMemOperand *ExtraMMO =
      MF.getMachineMemOperand(LD->getMemOperand(),
                              1, 2*MemVT.getStoreSize()-1);
    SDValue ExtraLoadOps[] = { Chain, LDXIntID, Ptr };
    SDValue ExtraLoad =
      DAG.getMemIntrinsicNode(ISD::INTRINSIC_W_CHAIN, dl,
                              DAG.getVTList(PermTy, MVT::Other),
                              ExtraLoadOps, LDTy, ExtraMMO);

    SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
      BaseLoad.getValue(1), ExtraLoad.getValue(1));

    // Because vperm has a big-endian bias, we must reverse the order
    // of the input vectors and complement the permute control vector
    // when generating little endian code.  We have already handled the
    // latter by using lvsr instead of lvsl, so just reverse BaseLoad
    // and ExtraLoad here.
    SDValue Perm;
    if (isLittleEndian)
      Perm = BuildIntrinsicOp(IntrPerm,
                              ExtraLoad, BaseLoad, PermCntl, DAG, dl);
    else
      Perm = BuildIntrinsicOp(IntrPerm,
                              BaseLoad, ExtraLoad, PermCntl, DAG, dl);

    if (VT != PermTy)
      Perm = Subtarget.hasAltivec()
                 ? DAG.getNode(ISD::BITCAST, dl, VT, Perm)
                 : DAG.getNode(ISD::FP_ROUND, dl, VT, Perm,
                               DAG.getTargetConstant(1, dl, MVT::i64));
                             // second argument is 1 because this rounding
                             // is always exact.

    // The output of the permutation is our loaded result, the TokenFactor is
    // our new chain.
    DCI.CombineTo(N, Perm, TF);
    return SDValue(N, 0);
  }
  }
  break;
  case ISD::INTRINSIC_WO_CHAIN: {
    bool isLittleEndian = Subtarget.isLittleEndian();
    unsigned IID = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
    Intrinsic::ID Intr = (isLittleEndian ? Intrinsic::ppc_altivec_lvsr
                                         : Intrinsic::ppc_altivec_lvsl);
    if (IID == Intr && N->getOperand(1)->getOpcode() == ISD::ADD) {
      SDValue Add = N->getOperand(1);

      int Bits = 4 /* 16 byte alignment */;

      if (DAG.MaskedValueIsZero(Add->getOperand(1),
                                APInt::getAllOnes(Bits /* alignment */)
                                    .zext(Add.getScalarValueSizeInBits()))) {
        SDNode *BasePtr = Add->getOperand(0).getNode();
        for (SDNode *U : BasePtr->uses()) {
          if (U->getOpcode() == ISD::INTRINSIC_WO_CHAIN &&
              cast<ConstantSDNode>(U->getOperand(0))->getZExtValue() == IID) {
            // We've found another LVSL/LVSR, and this address is an aligned
            // multiple of that one. The results will be the same, so use the
            // one we've just found instead.

            return SDValue(U, 0);
          }
        }
      }

      if (isa<ConstantSDNode>(Add->getOperand(1))) {
        SDNode *BasePtr = Add->getOperand(0).getNode();
        for (SDNode *U : BasePtr->uses()) {
          if (U->getOpcode() == ISD::ADD &&
              isa<ConstantSDNode>(U->getOperand(1)) &&
              (cast<ConstantSDNode>(Add->getOperand(1))->getZExtValue() -
               cast<ConstantSDNode>(U->getOperand(1))->getZExtValue()) %
                      (1ULL << Bits) ==
                  0) {
            SDNode *OtherAdd = U;
            for (SDNode *V : OtherAdd->uses()) {
              if (V->getOpcode() == ISD::INTRINSIC_WO_CHAIN &&
                  cast<ConstantSDNode>(V->getOperand(0))->getZExtValue() ==
                      IID) {
                return SDValue(V, 0);
              }
            }
          }
        }
      }
    }

    // Combine vmaxsw/h/b(a, a's negation) to abs(a)
    // Expose the vabsduw/h/b opportunity for down stream
    if (!DCI.isAfterLegalizeDAG() && Subtarget.hasP9Altivec() &&
        (IID == Intrinsic::ppc_altivec_vmaxsw ||
         IID == Intrinsic::ppc_altivec_vmaxsh ||
         IID == Intrinsic::ppc_altivec_vmaxsb)) {
      SDValue V1 = N->getOperand(1);
      SDValue V2 = N->getOperand(2);
      if ((V1.getSimpleValueType() == MVT::v4i32 ||
           V1.getSimpleValueType() == MVT::v8i16 ||
           V1.getSimpleValueType() == MVT::v16i8) &&
          V1.getSimpleValueType() == V2.getSimpleValueType()) {
        // (0-a, a)
        if (V1.getOpcode() == ISD::SUB &&
            ISD::isBuildVectorAllZeros(V1.getOperand(0).getNode()) &&
            V1.getOperand(1) == V2) {
          return DAG.getNode(ISD::ABS, dl, V2.getValueType(), V2);
        }
        // (a, 0-a)
        if (V2.getOpcode() == ISD::SUB &&
            ISD::isBuildVectorAllZeros(V2.getOperand(0).getNode()) &&
            V2.getOperand(1) == V1) {
          return DAG.getNode(ISD::ABS, dl, V1.getValueType(), V1);
        }
        // (x-y, y-x)
        if (V1.getOpcode() == ISD::SUB && V2.getOpcode() == ISD::SUB &&
            V1.getOperand(0) == V2.getOperand(1) &&
            V1.getOperand(1) == V2.getOperand(0)) {
          return DAG.getNode(ISD::ABS, dl, V1.getValueType(), V1);
        }
      }
    }
  }

  break;
case ISD::INTRINSIC_W_CHAIN:
  switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
  default:
    break;
  case Intrinsic::ppc_altivec_vsum4sbs:
  case Intrinsic::ppc_altivec_vsum4shs:
  case Intrinsic::ppc_altivec_vsum4ubs: {
    // These sum-across intrinsics only have a chain due to the side effect
    // that they may set the SAT bit. If we know the SAT bit will not be set
    // for some inputs, we can replace any uses of their chain with the input
    // chain.
    if (BuildVectorSDNode *BVN =
            dyn_cast<BuildVectorSDNode>(N->getOperand(3))) {
      APInt APSplatBits, APSplatUndef;
      unsigned SplatBitSize;
      bool HasAnyUndefs;
      bool BVNIsConstantSplat = BVN->isConstantSplat(
          APSplatBits, APSplatUndef, SplatBitSize, HasAnyUndefs, 0,
          !Subtarget.isLittleEndian());
      // If the constant splat vector is 0, the SAT bit will not be set.
      if (BVNIsConstantSplat && APSplatBits == 0)
        DAG.ReplaceAllUsesOfValueWith(SDValue(N, 1), N->getOperand(0));
    }
    return SDValue();
  }
  case Intrinsic::ppc_vsx_lxvw4x:
  case Intrinsic::ppc_vsx_lxvd2x:
    // For little endian, VSX loads require generating lxvd2x/xxswapd.
    // Not needed on ISA 3.0 based CPUs since we have a non-permuting load.
    if (Subtarget.needsSwapsForVSXMemOps())
      return expandVSXLoadForLE(N, DCI);
    break;
  }
  break;
case ISD::INTRINSIC_VOID:
  // For little endian, VSX stores require generating xxswapd/stxvd2x.
  // Not needed on ISA 3.0 based CPUs since we have a non-permuting store.
  if (Subtarget.needsSwapsForVSXMemOps()) {
    switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
    default:
      break;
    case Intrinsic::ppc_vsx_stxvw4x:
    case Intrinsic::ppc_vsx_stxvd2x:
      return expandVSXStoreForLE(N, DCI);
    }
  }
  break;
case ISD::BSWAP: {
  // Turn BSWAP (LOAD) -> lhbrx/lwbrx.
  // For subtargets without LDBRX, we can still do better than the default
  // expansion even for 64-bit BSWAP (LOAD).
  bool Is64BitBswapOn64BitTgt =
      Subtarget.isPPC64() && N->getValueType(0) == MVT::i64;
  bool IsSingleUseNormalLd = ISD::isNormalLoad(N->getOperand(0).getNode()) &&
                             N->getOperand(0).hasOneUse();
  if (IsSingleUseNormalLd &&
      (N->getValueType(0) == MVT::i32 || N->getValueType(0) == MVT::i16 ||
       (Subtarget.hasLDBRX() && Is64BitBswapOn64BitTgt))) {
    SDValue Load = N->getOperand(0);
    LoadSDNode *LD = cast<LoadSDNode>(Load);
    // Create the byte-swapping load.
    SDValue Ops[] = {
      LD->getChain(),    // Chain
      LD->getBasePtr(),  // Ptr
      DAG.getValueType(N->getValueType(0)) // VT
    };
    SDValue BSLoad =
      DAG.getMemIntrinsicNode(PPCISD::LBRX, dl,
                              DAG.getVTList(N->getValueType(0) == MVT::i64 ?
                                            MVT::i64 : MVT::i32, MVT::Other),
                              Ops, LD->getMemoryVT(), LD->getMemOperand());

    // If this is an i16 load, insert the truncate.
    SDValue ResVal = BSLoad;
    if (N->getValueType(0) == MVT::i16)
      ResVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i16, BSLoad);

    // First, combine the bswap away.  This makes the value produced by the
    // load dead.
    DCI.CombineTo(N, ResVal);

    // Next, combine the load away, we give it a bogus result value but a real
    // chain result.  The result value is dead because the bswap is dead.
    DCI.CombineTo(Load.getNode(), ResVal, BSLoad.getValue(1));

    // Return N so it doesn't get rechecked!
    return SDValue(N, 0);
  }
  // Convert this to two 32-bit bswap loads and a BUILD_PAIR. Do this only
  // before legalization so that the BUILD_PAIR is handled correctly.
  if (!DCI.isBeforeLegalize() || !Is64BitBswapOn64BitTgt ||
      !IsSingleUseNormalLd)
    return SDValue();
  LoadSDNode *LD = cast<LoadSDNode>(N->getOperand(0));

  // Can't split volatile or atomic loads.
  if (!LD->isSimple())
    return SDValue();
  SDValue BasePtr = LD->getBasePtr();
  SDValue Lo = DAG.getLoad(MVT::i32, dl, LD->getChain(), BasePtr,
                           LD->getPointerInfo(), LD->getAlign());
  Lo = DAG.getNode(ISD::BSWAP, dl, MVT::i32, Lo);
  BasePtr = DAG.getNode(ISD::ADD, dl, BasePtr.getValueType(), BasePtr,
                        DAG.getIntPtrConstant(4, dl));
  MachineMemOperand *NewMMO = DAG.getMachineFunction().getMachineMemOperand(
      LD->getMemOperand(), 4, 4);
  SDValue Hi = DAG.getLoad(MVT::i32, dl, LD->getChain(), BasePtr, NewMMO);
  Hi = DAG.getNode(ISD::BSWAP, dl, MVT::i32, Hi);
  SDValue Res;
  if (Subtarget.isLittleEndian())
    Res = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Hi, Lo);
  else
    Res = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
  SDValue TF =
      DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
                  Hi.getOperand(0).getValue(1), Lo.getOperand(0).getValue(1));
  DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), TF);
  return Res;
}
case PPCISD::VCMP:
  // If a VCMP_rec node already exists with exactly the same operands as this
  // node, use its result instead of this node (VCMP_rec computes both a CR6
  // and a normal output).
  //
  if (!N->getOperand(0).hasOneUse() &&
      !N->getOperand(1).hasOneUse() &&
      !N->getOperand(2).hasOneUse()) {

    // Scan all of the users of the LHS, looking for VCMP_rec's that match.
    SDNode *VCMPrecNode = nullptr;

    SDNode *LHSN = N->getOperand(0).getNode();
    for (SDNode::use_iterator UI = LHSN->use_begin(), E = LHSN->use_end();
         UI != E; ++UI)
      if (UI->getOpcode() == PPCISD::VCMP_rec &&
          UI->getOperand(1) == N->getOperand(1) &&
          UI->getOperand(2) == N->getOperand(2) &&
          UI->getOperand(0) == N->getOperand(0)) {
        VCMPrecNode = *UI;
        break;
      }

    // If there is no VCMP_rec node, or if the flag value has a single use,
    // don't transform this.
    if (!VCMPrecNode || VCMPrecNode->hasNUsesOfValue(0, 1))
      break;

    // Look at the (necessarily single) use of the flag value.  If it has a
    // chain, this transformation is more complex.  Note that multiple things
    // could use the value result, which we should ignore.
    SDNode *FlagUser = nullptr;
    for (SDNode::use_iterator UI = VCMPrecNode->use_begin();
         FlagUser == nullptr; ++UI) {
      assert(UI != VCMPrecNode->use_end() && "Didn't find user!")(static_cast <bool> (UI != VCMPrecNode->use_end() &&
 "Didn't find user!") ? void (0) : __assert_fail ("UI != VCMPrecNode->use_end() && \"Didn't find user!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 16095, __extension__
 __PRETTY_FUNCTION__));
      SDNode *User = *UI;
      for (unsigned i = 0, e = User->getNumOperands(); i != e; ++i) {
        if (User->getOperand(i) == SDValue(VCMPrecNode, 1)) {
          FlagUser = User;
          break;
        }
      }
    }

    // If the user is a MFOCRF instruction, we know this is safe.
    // Otherwise we give up for right now.
    if (FlagUser->getOpcode() == PPCISD::MFOCRF)
      return SDValue(VCMPrecNode, 0);
  }
  break;
case ISD::BR_CC: {
  // If this is a branch on an altivec predicate comparison, lower this so
  // that we don't have to do a MFOCRF: instead, branch directly on CR6.  This
  // lowering is done pre-legalize, because the legalizer lowers the predicate
  // compare down to code that is difficult to reassemble.
  // This code also handles branches that depend on the result of a store
  // conditional.
  ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(1))->get();
  SDValue LHS = N->getOperand(2), RHS = N->getOperand(3);

  int CompareOpc;
  bool isDot;

  if (!isa<ConstantSDNode>(RHS) || (CC != ISD::SETEQ && CC != ISD::SETNE))
    break;

  // Since we are doing this pre-legalize, the RHS can be a constant of
  // arbitrary bitwidth which may cause issues when trying to get the value
  // from the underlying APInt.
  auto RHSAPInt = cast<ConstantSDNode>(RHS)->getAPIntValue();
  if (!RHSAPInt.isIntN(64))
    break;

  unsigned Val = RHSAPInt.getZExtValue();
  auto isImpossibleCompare = [&]() {
    // If this is a comparison against something other than 0/1, then we know
    // that the condition is never/always true.
    if (Val != 0 && Val != 1) {
      if (CC == ISD::SETEQ)      // Cond never true, remove branch.
        return N->getOperand(0);
      // Always !=, turn it into an unconditional branch.
      return DAG.getNode(ISD::BR, dl, MVT::Other,
                         N->getOperand(0), N->getOperand(4));
    }
    return SDValue();
  };
  // Combine branches fed by store conditional instructions (st[bhwd]cx).
  unsigned StoreWidth = 0;
  if (LHS.getOpcode() == ISD::INTRINSIC_W_CHAIN &&
      isStoreConditional(LHS, StoreWidth)) {
    if (SDValue Impossible = isImpossibleCompare())
      return Impossible;
    PPC::Predicate CompOpc;
    // eq 0 => ne
    // ne 0 => eq
    // eq 1 => eq
    // ne 1 => ne
    if (Val == 0)
      CompOpc = CC == ISD::SETEQ ? PPC::PRED_NE : PPC::PRED_EQ;
    else
      CompOpc = CC == ISD::SETEQ ? PPC::PRED_EQ : PPC::PRED_NE;

    SDValue Ops[] = {LHS.getOperand(0), LHS.getOperand(2), LHS.getOperand(3),
                     DAG.getConstant(StoreWidth, dl, MVT::i32)};
    auto *MemNode = cast<MemSDNode>(LHS);
    SDValue ConstSt = DAG.getMemIntrinsicNode(
        PPCISD::STORE_COND, dl,
        DAG.getVTList(MVT::i32, MVT::Other, MVT::Glue), Ops,
        MemNode->getMemoryVT(), MemNode->getMemOperand());

    SDValue InChain;
    // Unchain the branch from the original store conditional.
    if (N->getOperand(0) == LHS.getValue(1))
      InChain = LHS.getOperand(0);
    else if (N->getOperand(0).getOpcode() == ISD::TokenFactor) {
      SmallVector<SDValue, 4> InChains;
      SDValue InTF = N->getOperand(0);
      for (int i = 0, e = InTF.getNumOperands(); i < e; i++)
        if (InTF.getOperand(i) != LHS.getValue(1))
          InChains.push_back(InTF.getOperand(i));
      InChain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, InChains);
    }

    return DAG.getNode(PPCISD::COND_BRANCH, dl, MVT::Other, InChain,
                       DAG.getConstant(CompOpc, dl, MVT::i32),
                       DAG.getRegister(PPC::CR0, MVT::i32), N->getOperand(4),
                       ConstSt.getValue(2));
  }

  if (LHS.getOpcode() == ISD::INTRINSIC_WO_CHAIN &&
      getVectorCompareInfo(LHS, CompareOpc, isDot, Subtarget)) {
    assert(isDot && "Can't compare against a vector result!")(static_cast <bool> (isDot && "Can't compare against a vector result!"
) ? void (0) : __assert_fail ("isDot && \"Can't compare against a vector result!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 16192, __extension__
 __PRETTY_FUNCTION__));

    if (SDValue Impossible = isImpossibleCompare())
      return Impossible;

    bool BranchOnWhenPredTrue = (CC == ISD::SETEQ) ^ (Val == 0);
    // Create the PPCISD altivec 'dot' comparison node.
    SDValue Ops[] = {
      LHS.getOperand(2),  // LHS of compare
      LHS.getOperand(3),  // RHS of compare
      DAG.getConstant(CompareOpc, dl, MVT::i32)
    };
    EVT VTs[] = { LHS.getOperand(2).getValueType(), MVT::Glue };
    SDValue CompNode = DAG.getNode(PPCISD::VCMP_rec, dl, VTs, Ops);

    // Unpack the result based on how the target uses it.
    PPC::Predicate CompOpc;
    switch (cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue()) {
    default:  // Can't happen, don't crash on invalid number though.
    case 0:   // Branch on the value of the EQ bit of CR6.
      CompOpc = BranchOnWhenPredTrue ? PPC::PRED_EQ : PPC::PRED_NE;
      break;
    case 1:   // Branch on the inverted value of the EQ bit of CR6.
      CompOpc = BranchOnWhenPredTrue ? PPC::PRED_NE : PPC::PRED_EQ;
      break;
    case 2:   // Branch on the value of the LT bit of CR6.
      CompOpc = BranchOnWhenPredTrue ? PPC::PRED_LT : PPC::PRED_GE;
      break;
    case 3:   // Branch on the inverted value of the LT bit of CR6.
      CompOpc = BranchOnWhenPredTrue ? PPC::PRED_GE : PPC::PRED_LT;
      break;
    }

    return DAG.getNode(PPCISD::COND_BRANCH, dl, MVT::Other, N->getOperand(0),
                       DAG.getConstant(CompOpc, dl, MVT::i32),
                       DAG.getRegister(PPC::CR6, MVT::i32),
                       N->getOperand(4), CompNode.getValue(1));
  }
  break;
}
case ISD::BUILD_VECTOR:
  return DAGCombineBuildVector(N, DCI);
}

return SDValue();
16237}

16239SDValue
16240PPCTargetLowering::BuildSDIVPow2(SDNode *N, const APInt &Divisor,
                               SelectionDAG &DAG,
                               SmallVectorImpl<SDNode *> &Created) const {
// fold (sdiv X, pow2)
EVT VT = N->getValueType(0);
if (VT == MVT::i64 && !Subtarget.isPPC64())
  return SDValue();
if ((VT != MVT::i32 && VT != MVT::i64) ||
    !(Divisor.isPowerOf2() || Divisor.isNegatedPowerOf2()))
  return SDValue();

SDLoc DL(N);
SDValue N0 = N->getOperand(0);

bool IsNegPow2 = Divisor.isNegatedPowerOf2();
unsigned Lg2 = (IsNegPow2 ? -Divisor : Divisor).countr_zero();
SDValue ShiftAmt = DAG.getConstant(Lg2, DL, VT);

SDValue Op = DAG.getNode(PPCISD::SRA_ADDZE, DL, VT, N0, ShiftAmt);
Created.push_back(Op.getNode());

if (IsNegPow2) {
  Op = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), Op);
  Created.push_back(Op.getNode());
}

return Op;
16267}

16269//===----------------------------------------------------------------------===//
16270// Inline Assembly Support
16271//===----------------------------------------------------------------------===//

16273void PPCTargetLowering::computeKnownBitsForTargetNode(const SDValue Op,
                                                    KnownBits &Known,
                                                    const APInt &DemandedElts,
                                                    const SelectionDAG &DAG,
                                                    unsigned Depth) const {
Known.resetAll();
switch (Op.getOpcode()) {
default: break;
case PPCISD::LBRX: {
  // lhbrx is known to have the top bits cleared out.
  if (cast<VTSDNode>(Op.getOperand(2))->getVT() == MVT::i16)
    Known.Zero = 0xFFFF0000;
  break;
}
case ISD::INTRINSIC_WO_CHAIN: {
  switch (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue()) {
  default: break;
  case Intrinsic::ppc_altivec_vcmpbfp_p:
  case Intrinsic::ppc_altivec_vcmpeqfp_p:
  case Intrinsic::ppc_altivec_vcmpequb_p:
  case Intrinsic::ppc_altivec_vcmpequh_p:
  case Intrinsic::ppc_altivec_vcmpequw_p:
  case Intrinsic::ppc_altivec_vcmpequd_p:
  case Intrinsic::ppc_altivec_vcmpequq_p:
  case Intrinsic::ppc_altivec_vcmpgefp_p:
  case Intrinsic::ppc_altivec_vcmpgtfp_p:
  case Intrinsic::ppc_altivec_vcmpgtsb_p:
  case Intrinsic::ppc_altivec_vcmpgtsh_p:
  case Intrinsic::ppc_altivec_vcmpgtsw_p:
  case Intrinsic::ppc_altivec_vcmpgtsd_p:
  case Intrinsic::ppc_altivec_vcmpgtsq_p:
  case Intrinsic::ppc_altivec_vcmpgtub_p:
  case Intrinsic::ppc_altivec_vcmpgtuh_p:
  case Intrinsic::ppc_altivec_vcmpgtuw_p:
  case Intrinsic::ppc_altivec_vcmpgtud_p:
  case Intrinsic::ppc_altivec_vcmpgtuq_p:
    Known.Zero = ~1U;  // All bits but the low one are known to be zero.
    break;
  }
  break;
}
case ISD::INTRINSIC_W_CHAIN: {
  switch (cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue()) {
  default:
    break;
  case Intrinsic::ppc_load2r:
    // Top bits are cleared for load2r (which is the same as lhbrx).
    Known.Zero = 0xFFFF0000;
    break;
  }
  break;
}
}
16326}

16328Align PPCTargetLowering::getPrefLoopAlignment(MachineLoop *ML) const {
switch (Subtarget.getCPUDirective()) {
default: break;
case PPC::DIR_970:
case PPC::DIR_PWR4:
case PPC::DIR_PWR5:
case PPC::DIR_PWR5X:
case PPC::DIR_PWR6:
case PPC::DIR_PWR6X:
case PPC::DIR_PWR7:
case PPC::DIR_PWR8:
case PPC::DIR_PWR9:
case PPC::DIR_PWR10:
case PPC::DIR_PWR_FUTURE: {
  if (!ML)
    break;

  if (!DisableInnermostLoopAlign32) {
    // If the nested loop is an innermost loop, prefer to a 32-byte alignment,
    // so that we can decrease cache misses and branch-prediction misses.
    // Actual alignment of the loop will depend on the hotness check and other
    // logic in alignBlocks.
    if (ML->getLoopDepth() > 1 && ML->getSubLoops().empty())
      return Align(32);
  }

  const PPCInstrInfo *TII = Subtarget.getInstrInfo();

  // For small loops (between 5 and 8 instructions), align to a 32-byte
  // boundary so that the entire loop fits in one instruction-cache line.
  uint64_t LoopSize = 0;
  for (auto I = ML->block_begin(), IE = ML->block_end(); I != IE; ++I)
    for (const MachineInstr &J : **I) {
      LoopSize += TII->getInstSizeInBytes(J);
      if (LoopSize > 32)
        break;
    }

  if (LoopSize > 16 && LoopSize <= 32)
    return Align(32);

  break;
}
}

return TargetLowering::getPrefLoopAlignment(ML);
16374}

16376/// getConstraintType - Given a constraint, return the type of
16377/// constraint it is for this target.
16378PPCTargetLowering::ConstraintType
16379PPCTargetLowering::getConstraintType(StringRef Constraint) const {
if (Constraint.size() == 1) {
  switch (Constraint[0]) {
  default: break;
  case 'b':
  case 'r':
  case 'f':
  case 'd':
  case 'v':
  case 'y':
    return C_RegisterClass;
  case 'Z':
    // FIXME: While Z does indicate a memory constraint, it specifically
    // indicates an r+r address (used in conjunction with the 'y' modifier
    // in the replacement string). Currently, we're forcing the base
    // register to be r0 in the asm printer (which is interpreted as zero)
    // and forming the complete address in the second register. This is
    // suboptimal.
    return C_Memory;
  }
} else if (Constraint == "wc") { // individual CR bits.
  return C_RegisterClass;
} else if (Constraint == "wa" || Constraint == "wd" ||
           Constraint == "wf" || Constraint == "ws" ||
           Constraint == "wi" || Constraint == "ww") {
  return C_RegisterClass; // VSX registers.
}
return TargetLowering::getConstraintType(Constraint);
16407}

16409/// Examine constraint type and operand type and determine a weight value.
16410/// This object must already have been set up with the operand type
16411/// and the current alternative constraint selected.
16412TargetLowering::ConstraintWeight
16413PPCTargetLowering::getSingleConstraintMatchWeight(
  AsmOperandInfo &info, const char *constraint) const {
ConstraintWeight weight = CW_Invalid;
Value *CallOperandVal = info.CallOperandVal;
  // If we don't have a value, we can't do a match,
  // but allow it at the lowest weight.
if (!CallOperandVal)
  return CW_Default;
Type *type = CallOperandVal->getType();

// Look at the constraint type.
if (StringRef(constraint) == "wc" && type->isIntegerTy(1))
  return CW_Register; // an individual CR bit.
else if ((StringRef(constraint) == "wa" ||
          StringRef(constraint) == "wd" ||
          StringRef(constraint) == "wf") &&
         type->isVectorTy())
  return CW_Register;
else if (StringRef(constraint) == "wi" && type->isIntegerTy(64))
  return CW_Register; // just hold 64-bit integers data.
else if (StringRef(constraint) == "ws" && type->isDoubleTy())
  return CW_Register;
else if (StringRef(constraint) == "ww" && type->isFloatTy())
  return CW_Register;

switch (*constraint) {
default:
  weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
  break;
case 'b':
  if (type->isIntegerTy())
    weight = CW_Register;
  break;
case 'f':
  if (type->isFloatTy())
    weight = CW_Register;
  break;
case 'd':
  if (type->isDoubleTy())
    weight = CW_Register;
  break;
case 'v':
  if (type->isVectorTy())
    weight = CW_Register;
  break;
case 'y':
  weight = CW_Register;
  break;
case 'Z':
  weight = CW_Memory;
  break;
}
return weight;
16466}

16468std::pair<unsigned, const TargetRegisterClass *>
16469PPCTargetLowering::getRegForInlineAsmConstraint(const TargetRegisterInfo *TRI,
                                              StringRef Constraint,
                                              MVT VT) const {
if (Constraint.size() == 1) {
  // GCC RS6000 Constraint Letters
  switch (Constraint[0]) {
  case 'b':   // R1-R31
    if (VT == MVT::i64 && Subtarget.isPPC64())
      return std::make_pair(0U, &PPC::G8RC_NOX0RegClass);
    return std::make_pair(0U, &PPC::GPRC_NOR0RegClass);
  case 'r':   // R0-R31
    if (VT == MVT::i64 && Subtarget.isPPC64())
      return std::make_pair(0U, &PPC::G8RCRegClass);
    return std::make_pair(0U, &PPC::GPRCRegClass);
  // 'd' and 'f' constraints are both defined to be "the floating point
  // registers", where one is for 32-bit and the other for 64-bit. We don't
  // really care overly much here so just give them all the same reg classes.
  case 'd':
  case 'f':
    if (Subtarget.hasSPE()) {
      if (VT == MVT::f32 || VT == MVT::i32)
        return std::make_pair(0U, &PPC::GPRCRegClass);
      if (VT == MVT::f64 || VT == MVT::i64)
        return std::make_pair(0U, &PPC::SPERCRegClass);
    } else {
      if (VT == MVT::f32 || VT == MVT::i32)
        return std::make_pair(0U, &PPC::F4RCRegClass);
      if (VT == MVT::f64 || VT == MVT::i64)
        return std::make_pair(0U, &PPC::F8RCRegClass);
    }
    break;
  case 'v':
    if (Subtarget.hasAltivec() && VT.isVector())
      return std::make_pair(0U, &PPC::VRRCRegClass);
    else if (Subtarget.hasVSX())
      // Scalars in Altivec registers only make sense with VSX.
      return std::make_pair(0U, &PPC::VFRCRegClass);
    break;
  case 'y':   // crrc
    return std::make_pair(0U, &PPC::CRRCRegClass);
  }
} else if (Constraint == "wc" && Subtarget.useCRBits()) {
  // An individual CR bit.
  return std::make_pair(0U, &PPC::CRBITRCRegClass);
} else if ((Constraint == "wa" || Constraint == "wd" ||
           Constraint == "wf" || Constraint == "wi") &&
           Subtarget.hasVSX()) {
  // A VSX register for either a scalar (FP) or vector. There is no
  // support for single precision scalars on subtargets prior to Power8.
  if (VT.isVector())
    return std::make_pair(0U, &PPC::VSRCRegClass);
  if (VT == MVT::f32 && Subtarget.hasP8Vector())
    return std::make_pair(0U, &PPC::VSSRCRegClass);
  return std::make_pair(0U, &PPC::VSFRCRegClass);
} else if ((Constraint == "ws" || Constraint == "ww") && Subtarget.hasVSX()) {
  if (VT == MVT::f32 && Subtarget.hasP8Vector())
    return std::make_pair(0U, &PPC::VSSRCRegClass);
  else
    return std::make_pair(0U, &PPC::VSFRCRegClass);
} else if (Constraint == "lr") {
  if (VT == MVT::i64)
    return std::make_pair(0U, &PPC::LR8RCRegClass);
  else
    return std::make_pair(0U, &PPC::LRRCRegClass);
}

// Handle special cases of physical registers that are not properly handled
// by the base class.
if (Constraint[0] == '{' && Constraint[Constraint.size() - 1] == '}') {
  // If we name a VSX register, we can't defer to the base class because it
  // will not recognize the correct register (their names will be VSL{0-31}
  // and V{0-31} so they won't match). So we match them here.
  if (Constraint.size() > 3 && Constraint[1] == 'v' && Constraint[2] == 's') {
    int VSNum = atoi(Constraint.data() + 3);
    assert(VSNum >= 0 && VSNum <= 63 &&(static_cast <bool> (VSNum >= 0 && VSNum <=
&& "Attempted to access a vsr out of range") ? void
 (0) : __assert_fail ("VSNum >= 0 && VSNum <= 63 && \"Attempted to access a vsr out of range\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 16544, __extension__
 __PRETTY_FUNCTION__))
           "Attempted to access a vsr out of range")(static_cast <bool> (VSNum >= 0 && VSNum <=
&& "Attempted to access a vsr out of range") ? void
 (0) : __assert_fail ("VSNum >= 0 && VSNum <= 63 && \"Attempted to access a vsr out of range\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 16544, __extension__
 __PRETTY_FUNCTION__));
    if (VSNum < 32)
      return std::make_pair(PPC::VSL0 + VSNum, &PPC::VSRCRegClass);
    return std::make_pair(PPC::V0 + VSNum - 32, &PPC::VSRCRegClass);
  }

  // For float registers, we can't defer to the base class as it will match
  // the SPILLTOVSRRC class.
  if (Constraint.size() > 3 && Constraint[1] == 'f') {
    int RegNum = atoi(Constraint.data() + 2);
    if (RegNum > 31 || RegNum < 0)
      report_fatal_error("Invalid floating point register number");
    if (VT == MVT::f32 || VT == MVT::i32)
      return Subtarget.hasSPE()
                 ? std::make_pair(PPC::R0 + RegNum, &PPC::GPRCRegClass)
                 : std::make_pair(PPC::F0 + RegNum, &PPC::F4RCRegClass);
    if (VT == MVT::f64 || VT == MVT::i64)
      return Subtarget.hasSPE()
                 ? std::make_pair(PPC::S0 + RegNum, &PPC::SPERCRegClass)
                 : std::make_pair(PPC::F0 + RegNum, &PPC::F8RCRegClass);
  }
}

std::pair<unsigned, const TargetRegisterClass *> R =
    TargetLowering::getRegForInlineAsmConstraint(TRI, Constraint, VT);

// r[0-9]+ are used, on PPC64, to refer to the corresponding 64-bit registers
// (which we call X[0-9]+). If a 64-bit value has been requested, and a
// 32-bit GPR has been selected, then 'upgrade' it to the 64-bit parent
// register.
// FIXME: If TargetLowering::getRegForInlineAsmConstraint could somehow use
// the AsmName field from *RegisterInfo.td, then this would not be necessary.
if (R.first && VT == MVT::i64 && Subtarget.isPPC64() &&
    PPC::GPRCRegClass.contains(R.first))
  return std::make_pair(TRI->getMatchingSuperReg(R.first,
                          PPC::sub_32, &PPC::G8RCRegClass),
                        &PPC::G8RCRegClass);

// GCC accepts 'cc' as an alias for 'cr0', and we need to do the same.
if (!R.second && StringRef("{cc}").equals_insensitive(Constraint)) {
  R.first = PPC::CR0;
  R.second = &PPC::CRRCRegClass;
}
// FIXME: This warning should ideally be emitted in the front end.
const auto &TM = getTargetMachine();
if (Subtarget.isAIXABI() && !TM.getAIXExtendedAltivecABI()) {
  if (((R.first >= PPC::V20 && R.first <= PPC::V31) ||
       (R.first >= PPC::VF20 && R.first <= PPC::VF31)) &&
      (R.second == &PPC::VSRCRegClass || R.second == &PPC::VSFRCRegClass))
    errs() << "warning: vector registers 20 to 32 are reserved in the "
              "default AIX AltiVec ABI and cannot be used\n";
}

return R;
16598}

16600/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
16601/// vector.  If it is invalid, don't add anything to Ops.
16602void PPCTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
                                                   std::string &Constraint,
                                                   std::vector<SDValue>&Ops,
                                                   SelectionDAG &DAG) const {
SDValue Result;

// Only support length 1 constraints.
if (Constraint.length() > 1) return;

char Letter = Constraint[0];
switch (Letter) {
default: break;
case 'I':
case 'J':
case 'K':
case 'L':
case 'M':
case 'N':
case 'O':
case 'P': {
  ConstantSDNode *CST = dyn_cast<ConstantSDNode>(Op);
  if (!CST) return; // Must be an immediate to match.
  SDLoc dl(Op);
  int64_t Value = CST->getSExtValue();
  EVT TCVT = MVT::i64; // All constants taken to be 64 bits so that negative
                       // numbers are printed as such.
  switch (Letter) {
  default: llvm_unreachable("Unknown constraint letter!")::llvm::llvm_unreachable_internal("Unknown constraint letter!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 16629);
  case 'I':  // "I" is a signed 16-bit constant.
    if (isInt<16>(Value))
      Result = DAG.getTargetConstant(Value, dl, TCVT);
    break;
  case 'J':  // "J" is a constant with only the high-order 16 bits nonzero.
    if (isShiftedUInt<16, 16>(Value))
      Result = DAG.getTargetConstant(Value, dl, TCVT);
    break;
  case 'L':  // "L" is a signed 16-bit constant shifted left 16 bits.
    if (isShiftedInt<16, 16>(Value))
      Result = DAG.getTargetConstant(Value, dl, TCVT);
    break;
  case 'K':  // "K" is a constant with only the low-order 16 bits nonzero.
    if (isUInt<16>(Value))
      Result = DAG.getTargetConstant(Value, dl, TCVT);
    break;
  case 'M':  // "M" is a constant that is greater than 31.
    if (Value > 31)
      Result = DAG.getTargetConstant(Value, dl, TCVT);
    break;
  case 'N':  // "N" is a positive constant that is an exact power of two.
    if (Value > 0 && isPowerOf2_64(Value))
      Result = DAG.getTargetConstant(Value, dl, TCVT);
    break;
  case 'O':  // "O" is the constant zero.
    if (Value == 0)
      Result = DAG.getTargetConstant(Value, dl, TCVT);
    break;
  case 'P':  // "P" is a constant whose negation is a signed 16-bit constant.
    if (isInt<16>(-Value))
      Result = DAG.getTargetConstant(Value, dl, TCVT);
    break;
  }
  break;
}
}

if (Result.getNode()) {
  Ops.push_back(Result);
  return;
}

// Handle standard constraint letters.
TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
16674}

16676void PPCTargetLowering::CollectTargetIntrinsicOperands(const CallInst &I,
                                            SmallVectorImpl<SDValue> &Ops,
                                            SelectionDAG &DAG) const {
if (I.getNumOperands() <= 1)
  return;
if (!isa<ConstantSDNode>(Ops[1].getNode()))
  return;
auto IntrinsicID = cast<ConstantSDNode>(Ops[1].getNode())->getZExtValue();
if (IntrinsicID != Intrinsic::ppc_tdw && IntrinsicID != Intrinsic::ppc_tw &&
    IntrinsicID != Intrinsic::ppc_trapd && IntrinsicID != Intrinsic::ppc_trap)
  return;

if (I.hasMetadata("annotation")) {
  MDNode *MDN = I.getMetadata("annotation");
  Ops.push_back(DAG.getMDNode(MDN));
}
16692}

16694// isLegalAddressingMode - Return true if the addressing mode represented
16695// by AM is legal for this target, for a load/store of the specified type.
16696bool PPCTargetLowering::isLegalAddressingMode(const DataLayout &DL,
                                            const AddrMode &AM, Type *Ty,
                                            unsigned AS,
                                            Instruction *I) const {
// Vector type r+i form is supported since power9 as DQ form. We don't check
// the offset matching DQ form requirement(off % 16 == 0), because on PowerPC,
// imm form is preferred and the offset can be adjusted to use imm form later
// in pass PPCLoopInstrFormPrep. Also in LSR, for one LSRUse, it uses min and
// max offset to check legal addressing mode, we should be a little aggressive
// to contain other offsets for that LSRUse.
if (Ty->isVectorTy() && AM.BaseOffs != 0 && !Subtarget.hasP9Vector())
  return false;

// PPC allows a sign-extended 16-bit immediate field.
if (AM.BaseOffs <= -(1LL << 16) || AM.BaseOffs >= (1LL << 16)-1)
  return false;

// No global is ever allowed as a base.
if (AM.BaseGV)
  return false;

// PPC only support r+r,
switch (AM.Scale) {
case 0:  // "r+i" or just "i", depending on HasBaseReg.
  break;
case 1:
  if (AM.HasBaseReg && AM.BaseOffs)  // "r+r+i" is not allowed.
    return false;
  // Otherwise we have r+r or r+i.
  break;
case 2:
  if (AM.HasBaseReg || AM.BaseOffs)  // 2*r+r  or  2*r+i is not allowed.
    return false;
  // Allow 2*r as r+r.
  break;
default:
  // No other scales are supported.
  return false;
}

return true;
16737}

16739SDValue PPCTargetLowering::LowerRETURNADDR(SDValue Op,
                                         SelectionDAG &DAG) const {
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo &MFI = MF.getFrameInfo();
MFI.setReturnAddressIsTaken(true);

if (verifyReturnAddressArgumentIsConstant(Op, DAG))
  return SDValue();

SDLoc dl(Op);
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();

// Make sure the function does not optimize away the store of the RA to
// the stack.
PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
FuncInfo->setLRStoreRequired();
bool isPPC64 = Subtarget.isPPC64();
auto PtrVT = getPointerTy(MF.getDataLayout());

if (Depth > 0) {
  // The link register (return address) is saved in the caller's frame
  // not the callee's stack frame. So we must get the caller's frame
  // address and load the return address at the LR offset from there.
  SDValue FrameAddr =
      DAG.getLoad(Op.getValueType(), dl, DAG.getEntryNode(),
                  LowerFRAMEADDR(Op, DAG), MachinePointerInfo());
  SDValue Offset =
      DAG.getConstant(Subtarget.getFrameLowering()->getReturnSaveOffset(), dl,
                      isPPC64 ? MVT::i64 : MVT::i32);
  return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
                     DAG.getNode(ISD::ADD, dl, PtrVT, FrameAddr, Offset),
                     MachinePointerInfo());
}

// Just load the return address off the stack.
SDValue RetAddrFI = getReturnAddrFrameIndex(DAG);
return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), RetAddrFI,
                   MachinePointerInfo());
16777}

16779SDValue PPCTargetLowering::LowerFRAMEADDR(SDValue Op,
                                        SelectionDAG &DAG) const {
SDLoc dl(Op);
unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();

MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo &MFI = MF.getFrameInfo();
MFI.setFrameAddressIsTaken(true);

EVT PtrVT = getPointerTy(MF.getDataLayout());
bool isPPC64 = PtrVT == MVT::i64;

// Naked functions never have a frame pointer, and so we use r1. For all
// other functions, this decision must be delayed until during PEI.
unsigned FrameReg;
if (MF.getFunction().hasFnAttribute(Attribute::Naked))
  FrameReg = isPPC64 ? PPC::X1 : PPC::R1;
else
  FrameReg = isPPC64 ? PPC::FP8 : PPC::FP;

SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg,
                                       PtrVT);
while (Depth--)
  FrameAddr = DAG.getLoad(Op.getValueType(), dl, DAG.getEntryNode(),
                          FrameAddr, MachinePointerInfo());
return FrameAddr;
16805}

16807// FIXME? Maybe this could be a TableGen attribute on some registers and
16808// this table could be generated automatically from RegInfo.
16809Register PPCTargetLowering::getRegisterByName(const char* RegName, LLT VT,
                                            const MachineFunction &MF) const {
bool isPPC64 = Subtarget.isPPC64();

bool is64Bit = isPPC64 && VT == LLT::scalar(64);
if (!is64Bit && VT != LLT::scalar(32))
  report_fatal_error("Invalid register global variable type");

Register Reg = StringSwitch<Register>(RegName)
                   .Case("r1", is64Bit ? PPC::X1 : PPC::R1)
                   .Case("r2", isPPC64 ? Register() : PPC::R2)
                   .Case("r13", (is64Bit ? PPC::X13 : PPC::R13))
                   .Default(Register());

if (Reg)
  return Reg;
report_fatal_error("Invalid register name global variable");
16826}

16828bool PPCTargetLowering::isAccessedAsGotIndirect(SDValue GA) const {
// 32-bit SVR4 ABI access everything as got-indirect.
if (Subtarget.is32BitELFABI())
  return true;

// AIX accesses everything indirectly through the TOC, which is similar to
// the GOT.
if (Subtarget.isAIXABI())
  return true;

CodeModel::Model CModel = getTargetMachine().getCodeModel();
// If it is small or large code model, module locals are accessed
// indirectly by loading their address from .toc/.got.
if (CModel == CodeModel::Small || CModel == CodeModel::Large)
  return true;

// JumpTable and BlockAddress are accessed as got-indirect.
if (isa<JumpTableSDNode>(GA) || isa<BlockAddressSDNode>(GA))
  return true;

if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(GA))
  return Subtarget.isGVIndirectSymbol(G->getGlobal());

return false;
16852}

16854bool
16855PPCTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
// The PowerPC target isn't yet aware of offsets.
return false;
16858}

16860bool PPCTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
                                         const CallInst &I,
                                         MachineFunction &MF,
                                         unsigned Intrinsic) const {
switch (Intrinsic) {
case Intrinsic::ppc_atomicrmw_xchg_i128:
case Intrinsic::ppc_atomicrmw_add_i128:
case Intrinsic::ppc_atomicrmw_sub_i128:
case Intrinsic::ppc_atomicrmw_nand_i128:
case Intrinsic::ppc_atomicrmw_and_i128:
case Intrinsic::ppc_atomicrmw_or_i128:
case Intrinsic::ppc_atomicrmw_xor_i128:
case Intrinsic::ppc_cmpxchg_i128:
  Info.opc = ISD::INTRINSIC_W_CHAIN;
  Info.memVT = MVT::i128;
  Info.ptrVal = I.getArgOperand(0);
  Info.offset = 0;
  Info.align = Align(16);
  Info.flags = MachineMemOperand::MOLoad | MachineMemOperand::MOStore |
               MachineMemOperand::MOVolatile;
  return true;
case Intrinsic::ppc_atomic_load_i128:
  Info.opc = ISD::INTRINSIC_W_CHAIN;
  Info.memVT = MVT::i128;
  Info.ptrVal = I.getArgOperand(0);
  Info.offset = 0;
  Info.align = Align(16);
  Info.flags = MachineMemOperand::MOLoad | MachineMemOperand::MOVolatile;
  return true;
case Intrinsic::ppc_atomic_store_i128:
  Info.opc = ISD::INTRINSIC_VOID;
  Info.memVT = MVT::i128;
  Info.ptrVal = I.getArgOperand(2);
  Info.offset = 0;
  Info.align = Align(16);
  Info.flags = MachineMemOperand::MOStore | MachineMemOperand::MOVolatile;
  return true;
case Intrinsic::ppc_altivec_lvx:
case Intrinsic::ppc_altivec_lvxl:
case Intrinsic::ppc_altivec_lvebx:
case Intrinsic::ppc_altivec_lvehx:
case Intrinsic::ppc_altivec_lvewx:
case Intrinsic::ppc_vsx_lxvd2x:
case Intrinsic::ppc_vsx_lxvw4x:
case Intrinsic::ppc_vsx_lxvd2x_be:
case Intrinsic::ppc_vsx_lxvw4x_be:
case Intrinsic::ppc_vsx_lxvl:
case Intrinsic::ppc_vsx_lxvll: {
  EVT VT;
  switch (Intrinsic) {
  case Intrinsic::ppc_altivec_lvebx:
    VT = MVT::i8;
    break;
  case Intrinsic::ppc_altivec_lvehx:
    VT = MVT::i16;
    break;
  case Intrinsic::ppc_altivec_lvewx:
    VT = MVT::i32;
    break;
  case Intrinsic::ppc_vsx_lxvd2x:
  case Intrinsic::ppc_vsx_lxvd2x_be:
    VT = MVT::v2f64;
    break;
  default:
    VT = MVT::v4i32;
    break;
  }

  Info.opc = ISD::INTRINSIC_W_CHAIN;
  Info.memVT = VT;
  Info.ptrVal = I.getArgOperand(0);
  Info.offset = -VT.getStoreSize()+1;
  Info.size = 2*VT.getStoreSize()-1;
  Info.align = Align(1);
  Info.flags = MachineMemOperand::MOLoad;
  return true;
}
case Intrinsic::ppc_altivec_stvx:
case Intrinsic::ppc_altivec_stvxl:
case Intrinsic::ppc_altivec_stvebx:
case Intrinsic::ppc_altivec_stvehx:
case Intrinsic::ppc_altivec_stvewx:
case Intrinsic::ppc_vsx_stxvd2x:
case Intrinsic::ppc_vsx_stxvw4x:
case Intrinsic::ppc_vsx_stxvd2x_be:
case Intrinsic::ppc_vsx_stxvw4x_be:
case Intrinsic::ppc_vsx_stxvl:
case Intrinsic::ppc_vsx_stxvll: {
  EVT VT;
  switch (Intrinsic) {
  case Intrinsic::ppc_altivec_stvebx:
    VT = MVT::i8;
    break;
  case Intrinsic::ppc_altivec_stvehx:
    VT = MVT::i16;
    break;
  case Intrinsic::ppc_altivec_stvewx:
    VT = MVT::i32;
    break;
  case Intrinsic::ppc_vsx_stxvd2x:
  case Intrinsic::ppc_vsx_stxvd2x_be:
    VT = MVT::v2f64;
    break;
  default:
    VT = MVT::v4i32;
    break;
  }

  Info.opc = ISD::INTRINSIC_VOID;
  Info.memVT = VT;
  Info.ptrVal = I.getArgOperand(1);
  Info.offset = -VT.getStoreSize()+1;
  Info.size = 2*VT.getStoreSize()-1;
  Info.align = Align(1);
  Info.flags = MachineMemOperand::MOStore;
  return true;
}
case Intrinsic::ppc_stdcx:
case Intrinsic::ppc_stwcx:
case Intrinsic::ppc_sthcx:
case Intrinsic::ppc_stbcx: {
  EVT VT;
  auto Alignment = Align(8);
  switch (Intrinsic) {
  case Intrinsic::ppc_stdcx:
    VT = MVT::i64;
    break;
  case Intrinsic::ppc_stwcx:
    VT = MVT::i32;
    Alignment = Align(4);
    break;
  case Intrinsic::ppc_sthcx:
    VT = MVT::i16;
    Alignment = Align(2);
    break;
  case Intrinsic::ppc_stbcx:
    VT = MVT::i8;
    Alignment = Align(1);
    break;
  }
  Info.opc = ISD::INTRINSIC_W_CHAIN;
  Info.memVT = VT;
  Info.ptrVal = I.getArgOperand(0);
  Info.offset = 0;
  Info.align = Alignment;
  Info.flags = MachineMemOperand::MOStore | MachineMemOperand::MOVolatile;
  return true;
}
default:
  break;
}

return false;
17013}

17015/// It returns EVT::Other if the type should be determined using generic
17016/// target-independent logic.
17017EVT PPCTargetLowering::getOptimalMemOpType(
  const MemOp &Op, const AttributeList &FuncAttributes) const {
if (getTargetMachine().getOptLevel() != CodeGenOpt::None) {
  // We should use Altivec/VSX loads and stores when available. For unaligned
  // addresses, unaligned VSX loads are only fast starting with the P8.
  if (Subtarget.hasAltivec() && Op.size() >= 16 &&
      (Op.isAligned(Align(16)) ||
       ((Op.isMemset() && Subtarget.hasVSX()) || Subtarget.hasP8Vector())))
    return MVT::v4i32;
}

if (Subtarget.isPPC64()) {
  return MVT::i64;
}

return MVT::i32;
17033}

17035/// Returns true if it is beneficial to convert a load of a constant
17036/// to just the constant itself.
17037bool PPCTargetLowering::shouldConvertConstantLoadToIntImm(const APInt &Imm,
                                                        Type *Ty) const {
assert(Ty->isIntegerTy())(static_cast <bool> (Ty->isIntegerTy()) ? void (0) :
 __assert_fail ("Ty->isIntegerTy()", "llvm/lib/Target/PowerPC/PPCISelLowering.cpp"
, 17039, __extension__ __PRETTY_FUNCTION__));

unsigned BitSize = Ty->getPrimitiveSizeInBits();
return !(BitSize == 0 || BitSize > 64);
17043}

17045bool PPCTargetLowering::isTruncateFree(Type *Ty1, Type *Ty2) const {
if (!Ty1->isIntegerTy() || !Ty2->isIntegerTy())
  return false;
unsigned NumBits1 = Ty1->getPrimitiveSizeInBits();
unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
return NumBits1 == 64 && NumBits2 == 32;
17051}

17053bool PPCTargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
if (!VT1.isInteger() || !VT2.isInteger())
  return false;
unsigned NumBits1 = VT1.getSizeInBits();
unsigned NumBits2 = VT2.getSizeInBits();
return NumBits1 == 64 && NumBits2 == 32;
17059}

17061bool PPCTargetLowering::isZExtFree(SDValue Val, EVT VT2) const {
// Generally speaking, zexts are not free, but they are free when they can be
// folded with other operations.
if (LoadSDNode *LD = dyn_cast<LoadSDNode>(Val)) {
  EVT MemVT = LD->getMemoryVT();
  if ((MemVT == MVT::i1 || MemVT == MVT::i8 || MemVT == MVT::i16 ||
       (Subtarget.isPPC64() && MemVT == MVT::i32)) &&
      (LD->getExtensionType() == ISD::NON_EXTLOAD ||
       LD->getExtensionType() == ISD::ZEXTLOAD))
    return true;
}

// FIXME: Add other cases...
//  - 32-bit shifts with a zext to i64
//  - zext after ctlz, bswap, etc.
//  - zext after and by a constant mask

return TargetLowering::isZExtFree(Val, VT2);
17079}

17081bool PPCTargetLowering::isFPExtFree(EVT DestVT, EVT SrcVT) const {
assert(DestVT.isFloatingPoint() && SrcVT.isFloatingPoint() &&(static_cast <bool> (DestVT.isFloatingPoint() &&
 SrcVT.isFloatingPoint() && "invalid fpext types") ? void
 (0) : __assert_fail ("DestVT.isFloatingPoint() && SrcVT.isFloatingPoint() && \"invalid fpext types\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 17083, __extension__
 __PRETTY_FUNCTION__))
       "invalid fpext types")(static_cast <bool> (DestVT.isFloatingPoint() &&
 SrcVT.isFloatingPoint() && "invalid fpext types") ? void
 (0) : __assert_fail ("DestVT.isFloatingPoint() && SrcVT.isFloatingPoint() && \"invalid fpext types\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 17083, __extension__
 __PRETTY_FUNCTION__));
// Extending to float128 is not free.
if (DestVT == MVT::f128)
  return false;
return true;
17088}

17090bool PPCTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
return isInt<16>(Imm) || isUInt<16>(Imm);
17092}

17094bool PPCTargetLowering::isLegalAddImmediate(int64_t Imm) const {
return isInt<16>(Imm) || isUInt<16>(Imm);
17096}

17098bool PPCTargetLowering::allowsMisalignedMemoryAccesses(EVT VT, unsigned, Align,
                                                     MachineMemOperand::Flags,
                                                     unsigned *Fast) const {
if (DisablePPCUnaligned)
  return false;

// PowerPC supports unaligned memory access for simple non-vector types.
// Although accessing unaligned addresses is not as efficient as accessing
// aligned addresses, it is generally more efficient than manual expansion,
// and generally only traps for software emulation when crossing page
// boundaries.

if (!VT.isSimple())
  return false;

if (VT.isFloatingPoint() && !VT.isVector() &&
    !Subtarget.allowsUnalignedFPAccess())
  return false;

if (VT.getSimpleVT().isVector()) {
  if (Subtarget.hasVSX()) {
    if (VT != MVT::v2f64 && VT != MVT::v2i64 &&
        VT != MVT::v4f32 && VT != MVT::v4i32)
      return false;
  } else {
    return false;
  }
}

if (VT == MVT::ppcf128)
  return false;

if (Fast)
  *Fast = 1;

return true;
17134}

17136bool PPCTargetLowering::decomposeMulByConstant(LLVMContext &Context, EVT VT,
                                             SDValue C) const {
// Check integral scalar types.
if (!VT.isScalarInteger())
  return false;
if (auto *ConstNode = dyn_cast<ConstantSDNode>(C.getNode())) {
  if (!ConstNode->getAPIntValue().isSignedIntN(64))
    return false;
  // This transformation will generate >= 2 operations. But the following
  // cases will generate <= 2 instructions during ISEL. So exclude them.
  // 1. If the constant multiplier fits 16 bits, it can be handled by one
  // HW instruction, ie. MULLI
  // 2. If the multiplier after shifted fits 16 bits, an extra shift
  // instruction is needed than case 1, ie. MULLI and RLDICR
  int64_t Imm = ConstNode->getSExtValue();
  unsigned Shift = llvm::countr_zero<uint64_t>(Imm);
  Imm >>= Shift;
  if (isInt<16>(Imm))
    return false;
  uint64_t UImm = static_cast<uint64_t>(Imm);
  if (isPowerOf2_64(UImm + 1) || isPowerOf2_64(UImm - 1) ||
      isPowerOf2_64(1 - UImm) || isPowerOf2_64(-1 - UImm))
    return true;
}
return false;
17161}

17163bool PPCTargetLowering::isFMAFasterThanFMulAndFAdd(const MachineFunction &MF,
                                                 EVT VT) const {
return isFMAFasterThanFMulAndFAdd(
    MF.getFunction(), VT.getTypeForEVT(MF.getFunction().getContext()));
17167}

17169bool PPCTargetLowering::isFMAFasterThanFMulAndFAdd(const Function &F,
                                                 Type *Ty) const {
if (Subtarget.hasSPE())
  return false;
switch (Ty->getScalarType()->getTypeID()) {
case Type::FloatTyID:
case Type::DoubleTyID:
  return true;
case Type::FP128TyID:
  return Subtarget.hasP9Vector();
default:
  return false;
}
17182}

17184// FIXME: add more patterns which are not profitable to hoist.
17185bool PPCTargetLowering::isProfitableToHoist(Instruction *I) const {
if (!I->hasOneUse())
  return true;

Instruction *User = I->user_back();
assert(User && "A single use instruction with no uses.")(static_cast <bool> (User && "A single use instruction with no uses."
) ? void (0) : __assert_fail ("User && \"A single use instruction with no uses.\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 17190, __extension__
 __PRETTY_FUNCTION__));

switch (I->getOpcode()) {
case Instruction::FMul: {
  // Don't break FMA, PowerPC prefers FMA.
  if (User->getOpcode() != Instruction::FSub &&
      User->getOpcode() != Instruction::FAdd)
    return true;

  const TargetOptions &Options = getTargetMachine().Options;
  const Function *F = I->getFunction();
  const DataLayout &DL = F->getParent()->getDataLayout();
  Type *Ty = User->getOperand(0)->getType();

  return !(
      isFMAFasterThanFMulAndFAdd(*F, Ty) &&
      isOperationLegalOrCustom(ISD::FMA, getValueType(DL, Ty)) &&
      (Options.AllowFPOpFusion == FPOpFusion::Fast || Options.UnsafeFPMath));
}
case Instruction::Load: {
  // Don't break "store (load float*)" pattern, this pattern will be combined
  // to "store (load int32)" in later InstCombine pass. See function
  // combineLoadToOperationType. On PowerPC, loading a float point takes more
  // cycles than loading a 32 bit integer.
  LoadInst *LI = cast<LoadInst>(I);
  // For the loads that combineLoadToOperationType does nothing, like
  // ordered load, it should be profitable to hoist them.
  // For swifterror load, it can only be used for pointer to pointer type, so
  // later type check should get rid of this case.
  if (!LI->isUnordered())
    return true;

  if (User->getOpcode() != Instruction::Store)
    return true;

  if (I->getType()->getTypeID() != Type::FloatTyID)
    return true;

  return false;
}
default:
  return true;
}
return true;
17234}

17236const MCPhysReg *
17237PPCTargetLowering::getScratchRegisters(CallingConv::ID) const {
// LR is a callee-save register, but we must treat it as clobbered by any call
// site. Hence we include LR in the scratch registers, which are in turn added
// as implicit-defs for stackmaps and patchpoints. The same reasoning applies
// to CTR, which is used by any indirect call.
static const MCPhysReg ScratchRegs[] = {
  PPC::X12, PPC::LR8, PPC::CTR8, 0
};

return ScratchRegs;
17247}

17249Register PPCTargetLowering::getExceptionPointerRegister(
  const Constant *PersonalityFn) const {
return Subtarget.isPPC64() ? PPC::X3 : PPC::R3;
17252}

17254Register PPCTargetLowering::getExceptionSelectorRegister(
  const Constant *PersonalityFn) const {
return Subtarget.isPPC64() ? PPC::X4 : PPC::R4;
17257}

17259bool
17260PPCTargetLowering::shouldExpandBuildVectorWithShuffles(
                   EVT VT , unsigned DefinedValues) const {
if (VT == MVT::v2i64)
  return Subtarget.hasDirectMove(); // Don't need stack ops with direct moves

if (Subtarget.hasVSX())
  return true;

return TargetLowering::shouldExpandBuildVectorWithShuffles(VT, DefinedValues);
17269}

17271Sched::Preference PPCTargetLowering::getSchedulingPreference(SDNode *N) const {
if (DisableILPPref || Subtarget.enableMachineScheduler())
  return TargetLowering::getSchedulingPreference(N);

return Sched::ILP;
17276}

17278// Create a fast isel object.
17279FastISel *
17280PPCTargetLowering::createFastISel(FunctionLoweringInfo &FuncInfo,
                                const TargetLibraryInfo *LibInfo) const {
return PPC::createFastISel(FuncInfo, LibInfo);
17283}

17285// 'Inverted' means the FMA opcode after negating one multiplicand.
17286// For example, (fma -a b c) = (fnmsub a b c)
17287static unsigned invertFMAOpcode(unsigned Opc) {
switch (Opc) {
default:
  llvm_unreachable("Invalid FMA opcode for PowerPC!")::llvm::llvm_unreachable_internal("Invalid FMA opcode for PowerPC!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 17290);
case ISD::FMA:
  return PPCISD::FNMSUB;
case PPCISD::FNMSUB:
  return ISD::FMA;
}
17296}

17298SDValue PPCTargetLowering::getNegatedExpression(SDValue Op, SelectionDAG &DAG,
                                              bool LegalOps, bool OptForSize,
                                              NegatibleCost &Cost,
                                              unsigned Depth) const {
if (Depth > SelectionDAG::MaxRecursionDepth)
  return SDValue();

unsigned Opc = Op.getOpcode();
EVT VT = Op.getValueType();
SDNodeFlags Flags = Op.getNode()->getFlags();

switch (Opc) {
case PPCISD::FNMSUB:
  if (!Op.hasOneUse() || !isTypeLegal(VT))
    break;

  const TargetOptions &Options = getTargetMachine().Options;
  SDValue N0 = Op.getOperand(0);
  SDValue N1 = Op.getOperand(1);
  SDValue N2 = Op.getOperand(2);
  SDLoc Loc(Op);

  NegatibleCost N2Cost = NegatibleCost::Expensive;
  SDValue NegN2 =
      getNegatedExpression(N2, DAG, LegalOps, OptForSize, N2Cost, Depth + 1);

  if (!NegN2)
    return SDValue();

  // (fneg (fnmsub a b c)) => (fnmsub (fneg a) b (fneg c))
  // (fneg (fnmsub a b c)) => (fnmsub a (fneg b) (fneg c))
  // These transformations may change sign of zeroes. For example,
  // -(-ab-(-c))=-0 while -(-(ab-c))=+0 when a=b=c=1.
  if (Flags.hasNoSignedZeros() || Options.NoSignedZerosFPMath) {
    // Try and choose the cheaper one to negate.
    NegatibleCost N0Cost = NegatibleCost::Expensive;
    SDValue NegN0 = getNegatedExpression(N0, DAG, LegalOps, OptForSize,
                                         N0Cost, Depth + 1);

    NegatibleCost N1Cost = NegatibleCost::Expensive;
    SDValue NegN1 = getNegatedExpression(N1, DAG, LegalOps, OptForSize,
                                         N1Cost, Depth + 1);

    if (NegN0 && N0Cost <= N1Cost) {
      Cost = std::min(N0Cost, N2Cost);
      return DAG.getNode(Opc, Loc, VT, NegN0, N1, NegN2, Flags);
    } else if (NegN1) {
      Cost = std::min(N1Cost, N2Cost);
      return DAG.getNode(Opc, Loc, VT, N0, NegN1, NegN2, Flags);
    }
  }

  // (fneg (fnmsub a b c)) => (fma a b (fneg c))
  if (isOperationLegal(ISD::FMA, VT)) {
    Cost = N2Cost;
    return DAG.getNode(ISD::FMA, Loc, VT, N0, N1, NegN2, Flags);
  }

  break;
}

return TargetLowering::getNegatedExpression(Op, DAG, LegalOps, OptForSize,
                                            Cost, Depth);
17361}

17363// Override to enable LOAD_STACK_GUARD lowering on Linux.
17364bool PPCTargetLowering::useLoadStackGuardNode() const {
if (!Subtarget.isTargetLinux())
  return TargetLowering::useLoadStackGuardNode();
return true;
17368}

17370// Override to disable global variable loading on Linux and insert AIX canary
17371// word declaration.
17372void PPCTargetLowering::insertSSPDeclarations(Module &M) const {
if (Subtarget.isAIXABI()) {
  M.getOrInsertGlobal(AIXSSPCanaryWordName,
                      Type::getInt8PtrTy(M.getContext()));
  return;
}
if (!Subtarget.isTargetLinux())
  return TargetLowering::insertSSPDeclarations(M);
17380}

17382Value *PPCTargetLowering::getSDagStackGuard(const Module &M) const {
if (Subtarget.isAIXABI())
  return M.getGlobalVariable(AIXSSPCanaryWordName);
return TargetLowering::getSDagStackGuard(M);
17386}

17388bool PPCTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT,
                                   bool ForCodeSize) const {
if (!VT.isSimple() || !Subtarget.hasVSX())
  return false;

switch(VT.getSimpleVT().SimpleTy) {
default:
  // For FP types that are currently not supported by PPC backend, return
  // false. Examples: f16, f80.
  return false;
case MVT::f32:
case MVT::f64: {
  if (Subtarget.hasPrefixInstrs()) {
    // we can materialize all immediatess via XXSPLTI32DX and XXSPLTIDP.
    return true;
  }
  bool IsExact;
  APSInt IntResult(16, false);
  // The rounding mode doesn't really matter because we only care about floats
  // that can be converted to integers exactly.
  Imm.convertToInteger(IntResult, APFloat::rmTowardZero, &IsExact);
  // For exact values in the range [-16, 15] we can materialize the float.
  if (IsExact && IntResult <= 15 && IntResult >= -16)
    return true;
  return Imm.isZero();
}
case MVT::ppcf128:
  return Imm.isPosZero();
}
17417}

17419// For vector shift operation op, fold
17420// (op x, (and y, ((1 << numbits(x)) - 1))) -> (target op x, y)
17421static SDValue stripModuloOnShift(const TargetLowering &TLI, SDNode *N,
                                SelectionDAG &DAG) {
SDValue N0 = N->getOperand(0);
SDValue N1 = N->getOperand(1);
EVT VT = N0.getValueType();
unsigned OpSizeInBits = VT.getScalarSizeInBits();
unsigned Opcode = N->getOpcode();
unsigned TargetOpcode;

switch (Opcode) {
default:
  llvm_unreachable("Unexpected shift operation")::llvm::llvm_unreachable_internal("Unexpected shift operation"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 17432);
case ISD::SHL:
  TargetOpcode = PPCISD::SHL;
  break;
case ISD::SRL:
  TargetOpcode = PPCISD::SRL;
  break;
case ISD::SRA:
  TargetOpcode = PPCISD::SRA;
  break;
}

if (VT.isVector() && TLI.isOperationLegal(Opcode, VT) &&
    N1->getOpcode() == ISD::AND)
  if (ConstantSDNode *Mask = isConstOrConstSplat(N1->getOperand(1)))
    if (Mask->getZExtValue() == OpSizeInBits - 1)
      return DAG.getNode(TargetOpcode, SDLoc(N), VT, N0, N1->getOperand(0));

return SDValue();
17451}

17453SDValue PPCTargetLowering::combineSHL(SDNode *N, DAGCombinerInfo &DCI) const {
if (auto Value = stripModuloOnShift(*this, N, DCI.DAG))
  return Value;

SDValue N0 = N->getOperand(0);
ConstantSDNode *CN1 = dyn_cast<ConstantSDNode>(N->getOperand(1));
if (!Subtarget.isISA3_0() || !Subtarget.isPPC64() ||
    N0.getOpcode() != ISD::SIGN_EXTEND ||
    N0.getOperand(0).getValueType() != MVT::i32 || CN1 == nullptr ||
    N->getValueType(0) != MVT::i64)
  return SDValue();

// We can't save an operation here if the value is already extended, and
// the existing shift is easier to combine.
SDValue ExtsSrc = N0.getOperand(0);
if (ExtsSrc.getOpcode() == ISD::TRUNCATE &&
    ExtsSrc.getOperand(0).getOpcode() == ISD::AssertSext)
  return SDValue();

SDLoc DL(N0);
SDValue ShiftBy = SDValue(CN1, 0);
// We want the shift amount to be i32 on the extswli, but the shift could
// have an i64.
if (ShiftBy.getValueType() == MVT::i64)
  ShiftBy = DCI.DAG.getConstant(CN1->getZExtValue(), DL, MVT::i32);

return DCI.DAG.getNode(PPCISD::EXTSWSLI, DL, MVT::i64, N0->getOperand(0),
                       ShiftBy);
17481}

17483SDValue PPCTargetLowering::combineSRA(SDNode *N, DAGCombinerInfo &DCI) const {
if (auto Value = stripModuloOnShift(*this, N, DCI.DAG))
  return Value;

return SDValue();
17488}

17490SDValue PPCTargetLowering::combineSRL(SDNode *N, DAGCombinerInfo &DCI) const {
if (auto Value = stripModuloOnShift(*this, N, DCI.DAG))
  return Value;

return SDValue();
17495}

17497// Transform (add X, (zext(setne Z, C))) -> (addze X, (addic (addi Z, -C), -1))
17498// Transform (add X, (zext(sete  Z, C))) -> (addze X, (subfic (addi Z, -C), 0))
17499// When C is zero, the equation (addi Z, -C) can be simplified to Z
17500// Requirement: -C in [-32768, 32767], X and Z are MVT::i64 types
17501static SDValue combineADDToADDZE(SDNode *N, SelectionDAG &DAG,
                               const PPCSubtarget &Subtarget) {
if (!Subtarget.isPPC64())
  return SDValue();

SDValue LHS = N->getOperand(0);
SDValue RHS = N->getOperand(1);

auto isZextOfCompareWithConstant = [](SDValue Op) {
  if (Op.getOpcode() != ISD::ZERO_EXTEND || !Op.hasOneUse() ||
      Op.getValueType() != MVT::i64)
    return false;

  SDValue Cmp = Op.getOperand(0);
  if (Cmp.getOpcode() != ISD::SETCC || !Cmp.hasOneUse() ||
      Cmp.getOperand(0).getValueType() != MVT::i64)
    return false;

  if (auto *Constant = dyn_cast<ConstantSDNode>(Cmp.getOperand(1))) {
    int64_t NegConstant = 0 - Constant->getSExtValue();
    // Due to the limitations of the addi instruction,
    // -C is required to be [-32768, 32767].
    return isInt<16>(NegConstant);
  }

  return false;
};

bool LHSHasPattern = isZextOfCompareWithConstant(LHS);
bool RHSHasPattern = isZextOfCompareWithConstant(RHS);

// If there is a pattern, canonicalize a zext operand to the RHS.
if (LHSHasPattern && !RHSHasPattern)
  std::swap(LHS, RHS);
else if (!LHSHasPattern && !RHSHasPattern)
  return SDValue();

SDLoc DL(N);
SDVTList VTs = DAG.getVTList(MVT::i64, MVT::Glue);
SDValue Cmp = RHS.getOperand(0);
SDValue Z = Cmp.getOperand(0);
auto *Constant = cast<ConstantSDNode>(Cmp.getOperand(1));
int64_t NegConstant = 0 - Constant->getSExtValue();

switch(cast<CondCodeSDNode>(Cmp.getOperand(2))->get()) {
default: break;
case ISD::SETNE: {
  //                                 when C == 0
  //                             --> addze X, (addic Z, -1).carry
  //                            /
  // add X, (zext(setne Z, C))--
  //                            \    when -32768 <= -C <= 32767 && C != 0
  //                             --> addze X, (addic (addi Z, -C), -1).carry
  SDValue Add = DAG.getNode(ISD::ADD, DL, MVT::i64, Z,
                            DAG.getConstant(NegConstant, DL, MVT::i64));
  SDValue AddOrZ = NegConstant != 0 ? Add : Z;
  SDValue Addc = DAG.getNode(ISD::ADDC, DL, DAG.getVTList(MVT::i64, MVT::Glue),
                             AddOrZ, DAG.getConstant(-1ULL, DL, MVT::i64));
  return DAG.getNode(ISD::ADDE, DL, VTs, LHS, DAG.getConstant(0, DL, MVT::i64),
                     SDValue(Addc.getNode(), 1));
  }
case ISD::SETEQ: {
  //                                 when C == 0
  //                             --> addze X, (subfic Z, 0).carry
  //                            /
  // add X, (zext(sete  Z, C))--
  //                            \    when -32768 <= -C <= 32767 && C != 0
  //                             --> addze X, (subfic (addi Z, -C), 0).carry
  SDValue Add = DAG.getNode(ISD::ADD, DL, MVT::i64, Z,
                            DAG.getConstant(NegConstant, DL, MVT::i64));
  SDValue AddOrZ = NegConstant != 0 ? Add : Z;
  SDValue Subc = DAG.getNode(ISD::SUBC, DL, DAG.getVTList(MVT::i64, MVT::Glue),
                             DAG.getConstant(0, DL, MVT::i64), AddOrZ);
  return DAG.getNode(ISD::ADDE, DL, VTs, LHS, DAG.getConstant(0, DL, MVT::i64),
                     SDValue(Subc.getNode(), 1));
  }
}

return SDValue();
17580}

17582// Transform
17583// (add C1, (MAT_PCREL_ADDR GlobalAddr+C2)) to
17584// (MAT_PCREL_ADDR GlobalAddr+(C1+C2))
17585// In this case both C1 and C2 must be known constants.
17586// C1+C2 must fit into a 34 bit signed integer.
17587static SDValue combineADDToMAT_PCREL_ADDR(SDNode *N, SelectionDAG &DAG,
                                        const PPCSubtarget &Subtarget) {
if (!Subtarget.isUsingPCRelativeCalls())
  return SDValue();

// Check both Operand 0 and Operand 1 of the ADD node for the PCRel node.
// If we find that node try to cast the Global Address and the Constant.
SDValue LHS = N->getOperand(0);
SDValue RHS = N->getOperand(1);

if (LHS.getOpcode() != PPCISD::MAT_PCREL_ADDR)
  std::swap(LHS, RHS);

if (LHS.getOpcode() != PPCISD::MAT_PCREL_ADDR)
  return SDValue();

// Operand zero of PPCISD::MAT_PCREL_ADDR is the GA node.
GlobalAddressSDNode *GSDN = dyn_cast<GlobalAddressSDNode>(LHS.getOperand(0));
ConstantSDNode* ConstNode = dyn_cast<ConstantSDNode>(RHS);

// Check that both casts succeeded.
if (!GSDN || !ConstNode)
  return SDValue();

int64_t NewOffset = GSDN->getOffset() + ConstNode->getSExtValue();
SDLoc DL(GSDN);

// The signed int offset needs to fit in 34 bits.
if (!isInt<34>(NewOffset))
  return SDValue();

// The new global address is a copy of the old global address except
// that it has the updated Offset.
SDValue GA =
    DAG.getTargetGlobalAddress(GSDN->getGlobal(), DL, GSDN->getValueType(0),
                               NewOffset, GSDN->getTargetFlags());
SDValue MatPCRel =
    DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, GSDN->getValueType(0), GA);
return MatPCRel;
17626}

17628SDValue PPCTargetLowering::combineADD(SDNode *N, DAGCombinerInfo &DCI) const {
if (auto Value = combineADDToADDZE(N, DCI.DAG, Subtarget))
  return Value;

if (auto Value = combineADDToMAT_PCREL_ADDR(N, DCI.DAG, Subtarget))
  return Value;

return SDValue();
17636}

17638// Detect TRUNCATE operations on bitcasts of float128 values.
17639// What we are looking for here is the situtation where we extract a subset
17640// of bits from a 128 bit float.
17641// This can be of two forms:
17642// 1) BITCAST of f128 feeding TRUNCATE
17643// 2) BITCAST of f128 feeding SRL (a shift) feeding TRUNCATE
17644// The reason this is required is because we do not have a legal i128 type
17645// and so we want to prevent having to store the f128 and then reload part
17646// of it.
17647SDValue PPCTargetLowering::combineTRUNCATE(SDNode *N,
                                         DAGCombinerInfo &DCI) const {
// If we are using CRBits then try that first.
if (Subtarget.useCRBits()) {
  // Check if CRBits did anything and return that if it did.
  if (SDValue CRTruncValue = DAGCombineTruncBoolExt(N, DCI))
    return CRTruncValue;
}

SDLoc dl(N);
SDValue Op0 = N->getOperand(0);

// Looking for a truncate of i128 to i64.
if (Op0.getValueType() != MVT::i128 || N->getValueType(0) != MVT::i64)
  return SDValue();

int EltToExtract = DCI.DAG.getDataLayout().isBigEndian() ? 1 : 0;

// SRL feeding TRUNCATE.
if (Op0.getOpcode() == ISD::SRL) {
  ConstantSDNode *ConstNode = dyn_cast<ConstantSDNode>(Op0.getOperand(1));
  // The right shift has to be by 64 bits.
  if (!ConstNode || ConstNode->getZExtValue() != 64)
    return SDValue();

  // Switch the element number to extract.
  EltToExtract = EltToExtract ? 0 : 1;
  // Update Op0 past the SRL.
  Op0 = Op0.getOperand(0);
}

// BITCAST feeding a TRUNCATE possibly via SRL.
if (Op0.getOpcode() == ISD::BITCAST &&
    Op0.getValueType() == MVT::i128 &&
    Op0.getOperand(0).getValueType() == MVT::f128) {
  SDValue Bitcast = DCI.DAG.getBitcast(MVT::v2i64, Op0.getOperand(0));
  return DCI.DAG.getNode(
      ISD::EXTRACT_VECTOR_ELT, dl, MVT::i64, Bitcast,
      DCI.DAG.getTargetConstant(EltToExtract, dl, MVT::i32));
}
return SDValue();
17688}

17690SDValue PPCTargetLowering::combineMUL(SDNode *N, DAGCombinerInfo &DCI) const {
SelectionDAG &DAG = DCI.DAG;

ConstantSDNode *ConstOpOrElement = isConstOrConstSplat(N->getOperand(1));
if (!ConstOpOrElement)
  return SDValue();

// An imul is usually smaller than the alternative sequence for legal type.
if (DAG.getMachineFunction().getFunction().hasMinSize() &&
    isOperationLegal(ISD::MUL, N->getValueType(0)))
  return SDValue();

auto IsProfitable = [this](bool IsNeg, bool IsAddOne, EVT VT) -> bool {
  switch (this->Subtarget.getCPUDirective()) {
  default:
    // TODO: enhance the condition for subtarget before pwr8
    return false;
  case PPC::DIR_PWR8:
    //  type        mul     add    shl
    // scalar        4       1      1
    // vector        7       2      2
    return true;
  case PPC::DIR_PWR9:
  case PPC::DIR_PWR10:
  case PPC::DIR_PWR_FUTURE:
    //  type        mul     add    shl
    // scalar        5       2      2
    // vector        7       2      2

    // The cycle RATIO of related operations are showed as a table above.
    // Because mul is 5(scalar)/7(vector), add/sub/shl are all 2 for both
    // scalar and vector type. For 2 instrs patterns, add/sub + shl
    // are 4, it is always profitable; but for 3 instrs patterns
    // (mul x, -(2^N + 1)) => -(add (shl x, N), x), sub + add + shl are 6.
    // So we should only do it for vector type.
    return IsAddOne && IsNeg ? VT.isVector() : true;
  }
};

EVT VT = N->getValueType(0);
SDLoc DL(N);

const APInt &MulAmt = ConstOpOrElement->getAPIntValue();
bool IsNeg = MulAmt.isNegative();
APInt MulAmtAbs = MulAmt.abs();

if ((MulAmtAbs - 1).isPowerOf2()) {
  // (mul x, 2^N + 1) => (add (shl x, N), x)
  // (mul x, -(2^N + 1)) => -(add (shl x, N), x)

  if (!IsProfitable(IsNeg, true, VT))
    return SDValue();

  SDValue Op0 = N->getOperand(0);
  SDValue Op1 =
      DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
                  DAG.getConstant((MulAmtAbs - 1).logBase2(), DL, VT));
  SDValue Res = DAG.getNode(ISD::ADD, DL, VT, Op0, Op1);

  if (!IsNeg)
    return Res;

  return DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, DL, VT), Res);
} else if ((MulAmtAbs + 1).isPowerOf2()) {
  // (mul x, 2^N - 1) => (sub (shl x, N), x)
  // (mul x, -(2^N - 1)) => (sub x, (shl x, N))

  if (!IsProfitable(IsNeg, false, VT))
    return SDValue();

  SDValue Op0 = N->getOperand(0);
  SDValue Op1 =
      DAG.getNode(ISD::SHL, DL, VT, N->getOperand(0),
                  DAG.getConstant((MulAmtAbs + 1).logBase2(), DL, VT));

  if (!IsNeg)
    return DAG.getNode(ISD::SUB, DL, VT, Op1, Op0);
  else
    return DAG.getNode(ISD::SUB, DL, VT, Op0, Op1);

} else {
  return SDValue();
}
17773}

17775// Combine fma-like op (like fnmsub) with fnegs to appropriate op. Do this
17776// in combiner since we need to check SD flags and other subtarget features.
17777SDValue PPCTargetLowering::combineFMALike(SDNode *N,
                                        DAGCombinerInfo &DCI) const {
SDValue N0 = N->getOperand(0);
SDValue N1 = N->getOperand(1);
SDValue N2 = N->getOperand(2);
SDNodeFlags Flags = N->getFlags();
EVT VT = N->getValueType(0);
SelectionDAG &DAG = DCI.DAG;
const TargetOptions &Options = getTargetMachine().Options;
unsigned Opc = N->getOpcode();
bool CodeSize = DAG.getMachineFunction().getFunction().hasOptSize();
bool LegalOps = !DCI.isBeforeLegalizeOps();
SDLoc Loc(N);

if (!isOperationLegal(ISD::FMA, VT))
  return SDValue();

// Allowing transformation to FNMSUB may change sign of zeroes when ab-c=0
// since (fnmsub a b c)=-0 while c-ab=+0.
if (!Flags.hasNoSignedZeros() && !Options.NoSignedZerosFPMath)
  return SDValue();

// (fma (fneg a) b c) => (fnmsub a b c)
// (fnmsub (fneg a) b c) => (fma a b c)
if (SDValue NegN0 = getCheaperNegatedExpression(N0, DAG, LegalOps, CodeSize))
  return DAG.getNode(invertFMAOpcode(Opc), Loc, VT, NegN0, N1, N2, Flags);

// (fma a (fneg b) c) => (fnmsub a b c)
// (fnmsub a (fneg b) c) => (fma a b c)
if (SDValue NegN1 = getCheaperNegatedExpression(N1, DAG, LegalOps, CodeSize))
  return DAG.getNode(invertFMAOpcode(Opc), Loc, VT, N0, NegN1, N2, Flags);

return SDValue();
17810}

17812bool PPCTargetLowering::mayBeEmittedAsTailCall(const CallInst *CI) const {
// Only duplicate to increase tail-calls for the 64bit SysV ABIs.
if (!Subtarget.is64BitELFABI())
  return false;

// If not a tail call then no need to proceed.
if (!CI->isTailCall())
  return false;

// If sibling calls have been disabled and tail-calls aren't guaranteed
// there is no reason to duplicate.
auto &TM = getTargetMachine();
if (!TM.Options.GuaranteedTailCallOpt && DisableSCO)
  return false;

// Can't tail call a function called indirectly, or if it has variadic args.
const Function *Callee = CI->getCalledFunction();
if (!Callee || Callee->isVarArg())
  return false;

// Make sure the callee and caller calling conventions are eligible for tco.
const Function *Caller = CI->getParent()->getParent();
if (!areCallingConvEligibleForTCO_64SVR4(Caller->getCallingConv(),
                                         CI->getCallingConv()))
    return false;

// If the function is local then we have a good chance at tail-calling it
return getTargetMachine().shouldAssumeDSOLocal(*Caller->getParent(), Callee);
17840}

17842bool PPCTargetLowering::
17843isMaskAndCmp0FoldingBeneficial(const Instruction &AndI) const {
const Value *Mask = AndI.getOperand(1);
// If the mask is suitable for andi. or andis. we should sink the and.
if (const ConstantInt *CI = dyn_cast<ConstantInt>(Mask)) {
  // Can't handle constants wider than 64-bits.
  if (CI->getBitWidth() > 64)
    return false;
  int64_t ConstVal = CI->getZExtValue();
  return isUInt<16>(ConstVal) ||
    (isUInt<16>(ConstVal >> 16) && !(ConstVal & 0xFFFF));
}

// For non-constant masks, we can always use the record-form and.
return true;
17857}

17859/// getAddrModeForFlags - Based on the set of address flags, select the most
17860/// optimal instruction format to match by.
17861PPC::AddrMode PPCTargetLowering::getAddrModeForFlags(unsigned Flags) const {
// This is not a node we should be handling here.
if (Flags == PPC::MOF_None)
  return PPC::AM_None;
// Unaligned D-Forms are tried first, followed by the aligned D-Forms.
for (auto FlagSet : AddrModesMap.at(PPC::AM_DForm))
  if ((Flags & FlagSet) == FlagSet)
    return PPC::AM_DForm;
for (auto FlagSet : AddrModesMap.at(PPC::AM_DSForm))
  if ((Flags & FlagSet) == FlagSet)
    return PPC::AM_DSForm;
for (auto FlagSet : AddrModesMap.at(PPC::AM_DQForm))
  if ((Flags & FlagSet) == FlagSet)
    return PPC::AM_DQForm;
for (auto FlagSet : AddrModesMap.at(PPC::AM_PrefixDForm))
  if ((Flags & FlagSet) == FlagSet)
    return PPC::AM_PrefixDForm;
// If no other forms are selected, return an X-Form as it is the most
// general addressing mode.
return PPC::AM_XForm;
17881}

17883/// Set alignment flags based on whether or not the Frame Index is aligned.
17884/// Utilized when computing flags for address computation when selecting
17885/// load and store instructions.
17886static void setAlignFlagsForFI(SDValue N, unsigned &FlagSet,
                             SelectionDAG &DAG) {
bool IsAdd = ((N.getOpcode() == ISD::ADD) || (N.getOpcode() == ISD::OR));
FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(IsAdd ? N.getOperand(0) : N);
if (!FI)
  return;
const MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo();
unsigned FrameIndexAlign = MFI.getObjectAlign(FI->getIndex()).value();
// If this is (add $FI, $S16Imm), the alignment flags are already set
// based on the immediate. We just need to clear the alignment flags
// if the FI alignment is weaker.
if ((FrameIndexAlign % 4) != 0)
  FlagSet &= ~PPC::MOF_RPlusSImm16Mult4;
if ((FrameIndexAlign % 16) != 0)
  FlagSet &= ~PPC::MOF_RPlusSImm16Mult16;
// If the address is a plain FrameIndex, set alignment flags based on
// FI alignment.
if (!IsAdd) {
  if ((FrameIndexAlign % 4) == 0)
    FlagSet |= PPC::MOF_RPlusSImm16Mult4;
  if ((FrameIndexAlign % 16) == 0)
    FlagSet |= PPC::MOF_RPlusSImm16Mult16;
}
17909}

17911/// Given a node, compute flags that are used for address computation when
17912/// selecting load and store instructions. The flags computed are stored in
17913/// FlagSet. This function takes into account whether the node is a constant,
17914/// an ADD, OR, or a constant, and computes the address flags accordingly.
17915static void computeFlagsForAddressComputation(SDValue N, unsigned &FlagSet,
                                            SelectionDAG &DAG) {
// Set the alignment flags for the node depending on if the node is
// 4-byte or 16-byte aligned.
auto SetAlignFlagsForImm = [&](uint64_t Imm) {
  if ((Imm & 0x3) == 0)
    FlagSet |= PPC::MOF_RPlusSImm16Mult4;
  if ((Imm & 0xf) == 0)
    FlagSet |= PPC::MOF_RPlusSImm16Mult16;
};

if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
  // All 32-bit constants can be computed as LIS + Disp.
  const APInt &ConstImm = CN->getAPIntValue();
  if (ConstImm.isSignedIntN(32)) { // Flag to handle 32-bit constants.
    FlagSet |= PPC::MOF_AddrIsSImm32;
    SetAlignFlagsForImm(ConstImm.getZExtValue());
    setAlignFlagsForFI(N, FlagSet, DAG);
  }
  if (ConstImm.isSignedIntN(34)) // Flag to handle 34-bit constants.
    FlagSet |= PPC::MOF_RPlusSImm34;
  else // Let constant materialization handle large constants.
    FlagSet |= PPC::MOF_NotAddNorCst;
} else if (N.getOpcode() == ISD::ADD || provablyDisjointOr(DAG, N)) {
  // This address can be represented as an addition of:
  // - Register + Imm16 (possibly a multiple of 4/16)
  // - Register + Imm34
  // - Register + PPCISD::Lo
  // - Register + Register
  // In any case, we won't have to match this as Base + Zero.
  SDValue RHS = N.getOperand(1);
  if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(RHS)) {
    const APInt &ConstImm = CN->getAPIntValue();
    if (ConstImm.isSignedIntN(16)) {
      FlagSet |= PPC::MOF_RPlusSImm16; // Signed 16-bit immediates.
      SetAlignFlagsForImm(ConstImm.getZExtValue());
      setAlignFlagsForFI(N, FlagSet, DAG);
    }
    if (ConstImm.isSignedIntN(34))
      FlagSet |= PPC::MOF_RPlusSImm34; // Signed 34-bit immediates.
    else
      FlagSet |= PPC::MOF_RPlusR; // Register.
  } else if (RHS.getOpcode() == PPCISD::Lo &&
             !cast<ConstantSDNode>(RHS.getOperand(1))->getZExtValue())
    FlagSet |= PPC::MOF_RPlusLo; // PPCISD::Lo.
  else
    FlagSet |= PPC::MOF_RPlusR;
} else { // The address computation is not a constant or an addition.
  setAlignFlagsForFI(N, FlagSet, DAG);
  FlagSet |= PPC::MOF_NotAddNorCst;
}
17966}

17968static bool isPCRelNode(SDValue N) {
return (N.getOpcode() == PPCISD::MAT_PCREL_ADDR ||
    isValidPCRelNode<ConstantPoolSDNode>(N) ||
    isValidPCRelNode<GlobalAddressSDNode>(N) ||
    isValidPCRelNode<JumpTableSDNode>(N) ||
    isValidPCRelNode<BlockAddressSDNode>(N));
17974}

17976/// computeMOFlags - Given a node N and it's Parent (a MemSDNode), compute
17977/// the address flags of the load/store instruction that is to be matched.
17978unsigned PPCTargetLowering::computeMOFlags(const SDNode *Parent, SDValue N,
                                         SelectionDAG &DAG) const {
unsigned FlagSet = PPC::MOF_None;

// Compute subtarget flags.
if (!Subtarget.hasP9Vector())
  FlagSet |= PPC::MOF_SubtargetBeforeP9;
else {
  FlagSet |= PPC::MOF_SubtargetP9;
  if (Subtarget.hasPrefixInstrs())
    FlagSet |= PPC::MOF_SubtargetP10;
}
if (Subtarget.hasSPE())
  FlagSet |= PPC::MOF_SubtargetSPE;

// Check if we have a PCRel node and return early.
if ((FlagSet & PPC::MOF_SubtargetP10) && isPCRelNode(N))
  return FlagSet;

// If the node is the paired load/store intrinsics, compute flags for
// address computation and return early.
unsigned ParentOp = Parent->getOpcode();
if (Subtarget.isISA3_1() && ((ParentOp == ISD::INTRINSIC_W_CHAIN) ||
                             (ParentOp == ISD::INTRINSIC_VOID))) {
  unsigned ID = cast<ConstantSDNode>(Parent->getOperand(1))->getZExtValue();
  if ((ID == Intrinsic::ppc_vsx_lxvp) || (ID == Intrinsic::ppc_vsx_stxvp)) {
    SDValue IntrinOp = (ID == Intrinsic::ppc_vsx_lxvp)
                           ? Parent->getOperand(2)
                           : Parent->getOperand(3);
    computeFlagsForAddressComputation(IntrinOp, FlagSet, DAG);
    FlagSet |= PPC::MOF_Vector;
    return FlagSet;
  }
}

// Mark this as something we don't want to handle here if it is atomic
// or pre-increment instruction.
if (const LSBaseSDNode *LSB = dyn_cast<LSBaseSDNode>(Parent))
  if (LSB->isIndexed())
    return PPC::MOF_None;

// Compute in-memory type flags. This is based on if there are scalars,
// floats or vectors.
const MemSDNode *MN = dyn_cast<MemSDNode>(Parent);
assert(MN && "Parent should be a MemSDNode!")(static_cast <bool> (MN && "Parent should be a MemSDNode!"
) ? void (0) : __assert_fail ("MN && \"Parent should be a MemSDNode!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18022, __extension__
 __PRETTY_FUNCTION__));
EVT MemVT = MN->getMemoryVT();
unsigned Size = MemVT.getSizeInBits();
if (MemVT.isScalarInteger()) {
  assert(Size <= 128 &&(static_cast <bool> (Size <= 128 && "Not expecting scalar integers larger than 16 bytes!"
) ? void (0) : __assert_fail ("Size <= 128 && \"Not expecting scalar integers larger than 16 bytes!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18027, __extension__
 __PRETTY_FUNCTION__))
         "Not expecting scalar integers larger than 16 bytes!")(static_cast <bool> (Size <= 128 && "Not expecting scalar integers larger than 16 bytes!"
) ? void (0) : __assert_fail ("Size <= 128 && \"Not expecting scalar integers larger than 16 bytes!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18027, __extension__
 __PRETTY_FUNCTION__));
  if (Size < 32)
    FlagSet |= PPC::MOF_SubWordInt;
  else if (Size == 32)
    FlagSet |= PPC::MOF_WordInt;
  else
    FlagSet |= PPC::MOF_DoubleWordInt;
} else if (MemVT.isVector() && !MemVT.isFloatingPoint()) { // Integer vectors.
  if (Size == 128)
    FlagSet |= PPC::MOF_Vector;
  else if (Size == 256) {
    assert(Subtarget.pairedVectorMemops() &&(static_cast <bool> (Subtarget.pairedVectorMemops() &&
 "256-bit vectors are only available when paired vector memops is "
 "enabled!") ? void (0) : __assert_fail ("Subtarget.pairedVectorMemops() && \"256-bit vectors are only available when paired vector memops is \" \"enabled!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18040, __extension__
 __PRETTY_FUNCTION__))
           "256-bit vectors are only available when paired vector memops is "(static_cast <bool> (Subtarget.pairedVectorMemops() &&
 "256-bit vectors are only available when paired vector memops is "
 "enabled!") ? void (0) : __assert_fail ("Subtarget.pairedVectorMemops() && \"256-bit vectors are only available when paired vector memops is \" \"enabled!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18040, __extension__
 __PRETTY_FUNCTION__))
           "enabled!")(static_cast <bool> (Subtarget.pairedVectorMemops() &&
 "256-bit vectors are only available when paired vector memops is "
 "enabled!") ? void (0) : __assert_fail ("Subtarget.pairedVectorMemops() && \"256-bit vectors are only available when paired vector memops is \" \"enabled!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18040, __extension__
 __PRETTY_FUNCTION__));
    FlagSet |= PPC::MOF_Vector;
  } else
    llvm_unreachable("Not expecting illegal vectors!")::llvm::llvm_unreachable_internal("Not expecting illegal vectors!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18043);
} else { // Floating point type: can be scalar, f128 or vector types.
  if (Size == 32 || Size == 64)
    FlagSet |= PPC::MOF_ScalarFloat;
  else if (MemVT == MVT::f128 || MemVT.isVector())
    FlagSet |= PPC::MOF_Vector;
  else
    llvm_unreachable("Not expecting illegal scalar floats!")::llvm::llvm_unreachable_internal("Not expecting illegal scalar floats!"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18050);
}

// Compute flags for address computation.
computeFlagsForAddressComputation(N, FlagSet, DAG);

// Compute type extension flags.
if (const LoadSDNode *LN = dyn_cast<LoadSDNode>(Parent)) {
  switch (LN->getExtensionType()) {
  case ISD::SEXTLOAD:
    FlagSet |= PPC::MOF_SExt;
    break;
  case ISD::EXTLOAD:
  case ISD::ZEXTLOAD:
    FlagSet |= PPC::MOF_ZExt;
    break;
  case ISD::NON_EXTLOAD:
    FlagSet |= PPC::MOF_NoExt;
    break;
  }
} else
  FlagSet |= PPC::MOF_NoExt;

// For integers, no extension is the same as zero extension.
// We set the extension mode to zero extension so we don't have
// to add separate entries in AddrModesMap for loads and stores.
if (MemVT.isScalarInteger() && (FlagSet & PPC::MOF_NoExt)) {
  FlagSet |= PPC::MOF_ZExt;
  FlagSet &= ~PPC::MOF_NoExt;
}

// If we don't have prefixed instructions, 34-bit constants should be
// treated as PPC::MOF_NotAddNorCst so they can match D-Forms.
bool IsNonP1034BitConst =
    ((PPC::MOF_RPlusSImm34 | PPC::MOF_AddrIsSImm32 | PPC::MOF_SubtargetP10) &
     FlagSet) == PPC::MOF_RPlusSImm34;
if (N.getOpcode() != ISD::ADD && N.getOpcode() != ISD::OR &&
    IsNonP1034BitConst)
  FlagSet |= PPC::MOF_NotAddNorCst;

return FlagSet;
18091}

18093/// SelectForceXFormMode - Given the specified address, force it to be
18094/// represented as an indexed [r+r] operation (an XForm instruction).
18095PPC::AddrMode PPCTargetLowering::SelectForceXFormMode(SDValue N, SDValue &Disp,
                                                    SDValue &Base,
                                                    SelectionDAG &DAG) const {

PPC::AddrMode Mode = PPC::AM_XForm;
int16_t ForceXFormImm = 0;
if (provablyDisjointOr(DAG, N) &&
    !isIntS16Immediate(N.getOperand(1), ForceXFormImm)) {
  Disp = N.getOperand(0);
  Base = N.getOperand(1);
  return Mode;
}

// If the address is the result of an add, we will utilize the fact that the
// address calculation includes an implicit add.  However, we can reduce
// register pressure if we do not materialize a constant just for use as the
// index register.  We only get rid of the add if it is not an add of a
// value and a 16-bit signed constant and both have a single use.
if (N.getOpcode() == ISD::ADD &&
    (!isIntS16Immediate(N.getOperand(1), ForceXFormImm) ||
     !N.getOperand(1).hasOneUse() || !N.getOperand(0).hasOneUse())) {
  Disp = N.getOperand(0);
  Base = N.getOperand(1);
  return Mode;
}

// Otherwise, use R0 as the base register.
Disp = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
                       N.getValueType());
Base = N;

return Mode;
18127}

18129bool PPCTargetLowering::splitValueIntoRegisterParts(
  SelectionDAG &DAG, const SDLoc &DL, SDValue Val, SDValue *Parts,
  unsigned NumParts, MVT PartVT, std::optional<CallingConv::ID> CC) const {
EVT ValVT = Val.getValueType();
// If we are splitting a scalar integer into f64 parts (i.e. so they
// can be placed into VFRC registers), we need to zero extend and
// bitcast the values. This will ensure the value is placed into a
// VSR using direct moves or stack operations as needed.
if (PartVT == MVT::f64 &&
    (ValVT == MVT::i32 || ValVT == MVT::i16 || ValVT == MVT::i8)) {
  Val = DAG.getNode(ISD::ZERO_EXTEND, DL, MVT::i64, Val);
  Val = DAG.getNode(ISD::BITCAST, DL, MVT::f64, Val);
  Parts[0] = Val;
  return true;
}
return false;
18145}

18147SDValue PPCTargetLowering::lowerToLibCall(const char *LibCallName, SDValue Op,
                                        SelectionDAG &DAG) const {
const TargetLowering &TLI = DAG.getTargetLoweringInfo();
TargetLowering::CallLoweringInfo CLI(DAG);
EVT RetVT = Op.getValueType();
Type *RetTy = RetVT.getTypeForEVT(*DAG.getContext());
SDValue Callee =
    DAG.getExternalSymbol(LibCallName, TLI.getPointerTy(DAG.getDataLayout()));
bool SignExtend = TLI.shouldSignExtendTypeInLibCall(RetVT, false);
TargetLowering::ArgListTy Args;
TargetLowering::ArgListEntry Entry;
for (const SDValue &N : Op->op_values()) {
  EVT ArgVT = N.getValueType();
  Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
  Entry.Node = N;
  Entry.Ty = ArgTy;
  Entry.IsSExt = TLI.shouldSignExtendTypeInLibCall(ArgVT, SignExtend);
  Entry.IsZExt = !Entry.IsSExt;
  Args.push_back(Entry);
}

SDValue InChain = DAG.getEntryNode();
SDValue TCChain = InChain;
const Function &F = DAG.getMachineFunction().getFunction();
bool isTailCall =
    TLI.isInTailCallPosition(DAG, Op.getNode(), TCChain) &&
    (RetTy == F.getReturnType() || F.getReturnType()->isVoidTy());
if (isTailCall)
  InChain = TCChain;
CLI.setDebugLoc(SDLoc(Op))
    .setChain(InChain)
    .setLibCallee(CallingConv::C, RetTy, Callee, std::move(Args))
    .setTailCall(isTailCall)
    .setSExtResult(SignExtend)
    .setZExtResult(!SignExtend)
    .setIsPostTypeLegalization(true);
return TLI.LowerCallTo(CLI).first;
18184}

18186SDValue PPCTargetLowering::lowerLibCallBasedOnType(
  const char *LibCallFloatName, const char *LibCallDoubleName, SDValue Op,
  SelectionDAG &DAG) const {
if (Op.getValueType() == MVT::f32)
  return lowerToLibCall(LibCallFloatName, Op, DAG);

if (Op.getValueType() == MVT::f64)
  return lowerToLibCall(LibCallDoubleName, Op, DAG);

return SDValue();
18196}

18198bool PPCTargetLowering::isLowringToMASSFiniteSafe(SDValue Op) const {
SDNodeFlags Flags = Op.getNode()->getFlags();
return isLowringToMASSSafe(Op) && Flags.hasNoSignedZeros() &&
       Flags.hasNoNaNs() && Flags.hasNoInfs();
18202}

18204bool PPCTargetLowering::isLowringToMASSSafe(SDValue Op) const {
return Op.getNode()->getFlags().hasApproximateFuncs();
18206}

18208bool PPCTargetLowering::isScalarMASSConversionEnabled() const {
return getTargetMachine().Options.PPCGenScalarMASSEntries;
18210}

18212SDValue PPCTargetLowering::lowerLibCallBase(const char *LibCallDoubleName,
                                          const char *LibCallFloatName,
                                          const char *LibCallDoubleNameFinite,
                                          const char *LibCallFloatNameFinite,
                                          SDValue Op,
                                          SelectionDAG &DAG) const {
if (!isScalarMASSConversionEnabled() || !isLowringToMASSSafe(Op))
  return SDValue();

if (!isLowringToMASSFiniteSafe(Op))
  return lowerLibCallBasedOnType(LibCallFloatName, LibCallDoubleName, Op,
                                 DAG);

return lowerLibCallBasedOnType(LibCallFloatNameFinite,
                               LibCallDoubleNameFinite, Op, DAG);
18227}

18229SDValue PPCTargetLowering::lowerPow(SDValue Op, SelectionDAG &DAG) const {
return lowerLibCallBase("__xl_pow", "__xl_powf", "__xl_pow_finite",
                        "__xl_powf_finite", Op, DAG);
18232}

18234SDValue PPCTargetLowering::lowerSin(SDValue Op, SelectionDAG &DAG) const {
return lowerLibCallBase("__xl_sin", "__xl_sinf", "__xl_sin_finite",
                        "__xl_sinf_finite", Op, DAG);
18237}

18239SDValue PPCTargetLowering::lowerCos(SDValue Op, SelectionDAG &DAG) const {
return lowerLibCallBase("__xl_cos", "__xl_cosf", "__xl_cos_finite",
                        "__xl_cosf_finite", Op, DAG);
18242}

18244SDValue PPCTargetLowering::lowerLog(SDValue Op, SelectionDAG &DAG) const {
return lowerLibCallBase("__xl_log", "__xl_logf", "__xl_log_finite",
                        "__xl_logf_finite", Op, DAG);
18247}

18249SDValue PPCTargetLowering::lowerLog10(SDValue Op, SelectionDAG &DAG) const {
return lowerLibCallBase("__xl_log10", "__xl_log10f", "__xl_log10_finite",
                        "__xl_log10f_finite", Op, DAG);
18252}

18254SDValue PPCTargetLowering::lowerExp(SDValue Op, SelectionDAG &DAG) const {
return lowerLibCallBase("__xl_exp", "__xl_expf", "__xl_exp_finite",
                        "__xl_expf_finite", Op, DAG);
18257}

18259// If we happen to match to an aligned D-Form, check if the Frame Index is
18260// adequately aligned. If it is not, reset the mode to match to X-Form.
18261static void setXFormForUnalignedFI(SDValue N, unsigned Flags,
                                 PPC::AddrMode &Mode) {
if (!isa<FrameIndexSDNode>(N))
  return;
if ((Mode == PPC::AM_DSForm && !(Flags & PPC::MOF_RPlusSImm16Mult4)) ||
    (Mode == PPC::AM_DQForm && !(Flags & PPC::MOF_RPlusSImm16Mult16)))
  Mode = PPC::AM_XForm;
18268}

18270/// SelectOptimalAddrMode - Based on a node N and it's Parent (a MemSDNode),
18271/// compute the address flags of the node, get the optimal address mode based
18272/// on the flags, and set the Base and Disp based on the address mode.
18273PPC::AddrMode PPCTargetLowering::SelectOptimalAddrMode(const SDNode *Parent,
                                                     SDValue N, SDValue &Disp,
                                                     SDValue &Base,
                                                     SelectionDAG &DAG,
                                                     MaybeAlign Align) const {
SDLoc DL(Parent);

// Compute the address flags.
unsigned Flags = computeMOFlags(Parent, N, DAG);

// Get the optimal address mode based on the Flags.
PPC::AddrMode Mode = getAddrModeForFlags(Flags);

// If the address mode is DS-Form or DQ-Form, check if the FI is aligned.
// Select an X-Form load if it is not.
setXFormForUnalignedFI(N, Flags, Mode);

// Set the mode to PC-Relative addressing mode if we have a valid PC-Rel node.
if ((Mode == PPC::AM_XForm) && isPCRelNode(N)) {
  assert(Subtarget.isUsingPCRelativeCalls() &&(static_cast <bool> (Subtarget.isUsingPCRelativeCalls()
 && "Must be using PC-Relative calls when a valid PC-Relative node is "
 "present!") ? void (0) : __assert_fail ("Subtarget.isUsingPCRelativeCalls() && \"Must be using PC-Relative calls when a valid PC-Relative node is \" \"present!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18294, __extension__
 __PRETTY_FUNCTION__))
         "Must be using PC-Relative calls when a valid PC-Relative node is "(static_cast <bool> (Subtarget.isUsingPCRelativeCalls()
 && "Must be using PC-Relative calls when a valid PC-Relative node is "
 "present!") ? void (0) : __assert_fail ("Subtarget.isUsingPCRelativeCalls() && \"Must be using PC-Relative calls when a valid PC-Relative node is \" \"present!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18294, __extension__
 __PRETTY_FUNCTION__))
         "present!")(static_cast <bool> (Subtarget.isUsingPCRelativeCalls()
 && "Must be using PC-Relative calls when a valid PC-Relative node is "
 "present!") ? void (0) : __assert_fail ("Subtarget.isUsingPCRelativeCalls() && \"Must be using PC-Relative calls when a valid PC-Relative node is \" \"present!\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18294, __extension__
 __PRETTY_FUNCTION__));
  Mode = PPC::AM_PCRel;
}

// Set Base and Disp accordingly depending on the address mode.
switch (Mode) {
case PPC::AM_DForm:
case PPC::AM_DSForm:
case PPC::AM_DQForm: {
  // This is a register plus a 16-bit immediate. The base will be the
  // register and the displacement will be the immediate unless it
  // isn't sufficiently aligned.
  if (Flags & PPC::MOF_RPlusSImm16) {
    SDValue Op0 = N.getOperand(0);
    SDValue Op1 = N.getOperand(1);
    int16_t Imm = cast<ConstantSDNode>(Op1)->getZExtValue();
    if (!Align || isAligned(*Align, Imm)) {
      Disp = DAG.getTargetConstant(Imm, DL, N.getValueType());
      Base = Op0;
      if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(Op0)) {
        Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
        fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
      }
      break;
    }
  }
  // This is a register plus the @lo relocation. The base is the register
  // and the displacement is the global address.
  else if (Flags & PPC::MOF_RPlusLo) {
    Disp = N.getOperand(1).getOperand(0); // The global address.
    assert(Disp.getOpcode() == ISD::TargetGlobalAddress ||(static_cast <bool> (Disp.getOpcode() == ISD::TargetGlobalAddress
 || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode
() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable
) ? void (0) : __assert_fail ("Disp.getOpcode() == ISD::TargetGlobalAddress || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18327, __extension__
 __PRETTY_FUNCTION__))
           Disp.getOpcode() == ISD::TargetGlobalTLSAddress ||(static_cast <bool> (Disp.getOpcode() == ISD::TargetGlobalAddress
 || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode
() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable
) ? void (0) : __assert_fail ("Disp.getOpcode() == ISD::TargetGlobalAddress || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18327, __extension__
 __PRETTY_FUNCTION__))
           Disp.getOpcode() == ISD::TargetConstantPool ||(static_cast <bool> (Disp.getOpcode() == ISD::TargetGlobalAddress
 || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode
() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable
) ? void (0) : __assert_fail ("Disp.getOpcode() == ISD::TargetGlobalAddress || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18327, __extension__
 __PRETTY_FUNCTION__))
           Disp.getOpcode() == ISD::TargetJumpTable)(static_cast <bool> (Disp.getOpcode() == ISD::TargetGlobalAddress
 || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode
() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable
) ? void (0) : __assert_fail ("Disp.getOpcode() == ISD::TargetGlobalAddress || Disp.getOpcode() == ISD::TargetGlobalTLSAddress || Disp.getOpcode() == ISD::TargetConstantPool || Disp.getOpcode() == ISD::TargetJumpTable"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18327, __extension__
 __PRETTY_FUNCTION__));
    Base = N.getOperand(0);
    break;
  }
  // This is a constant address at most 32 bits. The base will be
  // zero or load-immediate-shifted and the displacement will be
  // the low 16 bits of the address.
  else if (Flags & PPC::MOF_AddrIsSImm32) {
    auto *CN = cast<ConstantSDNode>(N);
    EVT CNType = CN->getValueType(0);
    uint64_t CNImm = CN->getZExtValue();
    // If this address fits entirely in a 16-bit sext immediate field, codegen
    // this as "d, 0".
    int16_t Imm;
    if (isIntS16Immediate(CN, Imm) && (!Align || isAligned(*Align, Imm))) {
      Disp = DAG.getTargetConstant(Imm, DL, CNType);
      Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
                             CNType);
      break;
    }
    // Handle 32-bit sext immediate with LIS + Addr mode.
    if ((CNType == MVT::i32 || isInt<32>(CNImm)) &&
        (!Align || isAligned(*Align, CNImm))) {
      int32_t Addr = (int32_t)CNImm;
      // Otherwise, break this down into LIS + Disp.
      Disp = DAG.getTargetConstant((int16_t)Addr, DL, MVT::i32);
      Base =
          DAG.getTargetConstant((Addr - (int16_t)Addr) >> 16, DL, MVT::i32);
      uint32_t LIS = CNType == MVT::i32 ? PPC::LIS : PPC::LIS8;
      Base = SDValue(DAG.getMachineNode(LIS, DL, CNType, Base), 0);
      break;
    }
  }
  // Otherwise, the PPC:MOF_NotAdd flag is set. Load/Store is Non-foldable.
  Disp = DAG.getTargetConstant(0, DL, getPointerTy(DAG.getDataLayout()));
  if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N)) {
    Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
    fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
  } else
    Base = N;
  break;
}
case PPC::AM_PrefixDForm: {
  int64_t Imm34 = 0;
  unsigned Opcode = N.getOpcode();
  if (((Opcode == ISD::ADD) || (Opcode == ISD::OR)) &&
      (isIntS34Immediate(N.getOperand(1), Imm34))) {
    // N is an Add/OR Node, and it's operand is a 34-bit signed immediate.
    Disp = DAG.getTargetConstant(Imm34, DL, N.getValueType());
    if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0)))
      Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
    else
      Base = N.getOperand(0);
  } else if (isIntS34Immediate(N, Imm34)) {
    // The address is a 34-bit signed immediate.
    Disp = DAG.getTargetConstant(Imm34, DL, N.getValueType());
    Base = DAG.getRegister(PPC::ZERO8, N.getValueType());
  }
  break;
}
case PPC::AM_PCRel: {
  // When selecting PC-Relative instructions, "Base" is not utilized as
  // we select the address as [PC+imm].
  Disp = N;
  break;
}
case PPC::AM_None:
  break;
default: { // By default, X-Form is always available to be selected.
  // When a frame index is not aligned, we also match by XForm.
  FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N);
  Base = FI ? N : N.getOperand(1);
  Disp = FI ? DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
                              N.getValueType())
            : N.getOperand(0);
  break;
}
}
return Mode;
18406}

18408CCAssignFn *PPCTargetLowering::ccAssignFnForCall(CallingConv::ID CC,
                                               bool Return,
                                               bool IsVarArg) const {
switch (CC) {
case CallingConv::Cold:
  return (Return ? RetCC_PPC_Cold : CC_PPC64_ELF);
default:
  return CC_PPC64_ELF;
}
18417}

18419bool PPCTargetLowering::shouldInlineQuadwordAtomics() const {
// TODO: 16-byte atomic type support for AIX is in progress; we should be able
// to inline 16-byte atomic ops on AIX too in the future.
return Subtarget.isPPC64() &&
       (EnableQuadwordAtomics || !Subtarget.getTargetTriple().isOSAIX()) &&
       Subtarget.hasQuadwordAtomics();
18425}

18427TargetLowering::AtomicExpansionKind
18428PPCTargetLowering::shouldExpandAtomicRMWInIR(AtomicRMWInst *AI) const {
unsigned Size = AI->getType()->getPrimitiveSizeInBits();
if (shouldInlineQuadwordAtomics() && Size == 128)
  return AtomicExpansionKind::MaskedIntrinsic;

switch (AI->getOperation()) {
case AtomicRMWInst::UIncWrap:
case AtomicRMWInst::UDecWrap:
  return AtomicExpansionKind::CmpXChg;
default:
  return TargetLowering::shouldExpandAtomicRMWInIR(AI);
}

llvm_unreachable("unreachable atomicrmw operation")::llvm::llvm_unreachable_internal("unreachable atomicrmw operation"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18441);
18442}

18444TargetLowering::AtomicExpansionKind
18445PPCTargetLowering::shouldExpandAtomicCmpXchgInIR(AtomicCmpXchgInst *AI) const {
unsigned Size = AI->getNewValOperand()->getType()->getPrimitiveSizeInBits();
if (shouldInlineQuadwordAtomics() && Size == 128)
  return AtomicExpansionKind::MaskedIntrinsic;
return TargetLowering::shouldExpandAtomicCmpXchgInIR(AI);
18450}

18452static Intrinsic::ID
18453getIntrinsicForAtomicRMWBinOp128(AtomicRMWInst::BinOp BinOp) {
switch (BinOp) {
default:
  llvm_unreachable("Unexpected AtomicRMW BinOp")::llvm::llvm_unreachable_internal("Unexpected AtomicRMW BinOp"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18456);
case AtomicRMWInst::Xchg:
  return Intrinsic::ppc_atomicrmw_xchg_i128;
case AtomicRMWInst::Add:
  return Intrinsic::ppc_atomicrmw_add_i128;
case AtomicRMWInst::Sub:
  return Intrinsic::ppc_atomicrmw_sub_i128;
case AtomicRMWInst::And:
  return Intrinsic::ppc_atomicrmw_and_i128;
case AtomicRMWInst::Or:
  return Intrinsic::ppc_atomicrmw_or_i128;
case AtomicRMWInst::Xor:
  return Intrinsic::ppc_atomicrmw_xor_i128;
case AtomicRMWInst::Nand:
  return Intrinsic::ppc_atomicrmw_nand_i128;
}
18472}

18474Value *PPCTargetLowering::emitMaskedAtomicRMWIntrinsic(
  IRBuilderBase &Builder, AtomicRMWInst *AI, Value *AlignedAddr, Value *Incr,
  Value *Mask, Value *ShiftAmt, AtomicOrdering Ord) const {
assert(shouldInlineQuadwordAtomics() && "Only support quadword now")(static_cast <bool> (shouldInlineQuadwordAtomics() &&
 "Only support quadword now") ? void (0) : __assert_fail ("shouldInlineQuadwordAtomics() && \"Only support quadword now\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18477, __extension__
 __PRETTY_FUNCTION__));
Module *M = Builder.GetInsertBlock()->getParent()->getParent();
Type *ValTy = Incr->getType();
assert(ValTy->getPrimitiveSizeInBits() == 128)(static_cast <bool> (ValTy->getPrimitiveSizeInBits()
 == 128) ? void (0) : __assert_fail ("ValTy->getPrimitiveSizeInBits() == 128"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18480, __extension__
 __PRETTY_FUNCTION__));
Function *RMW = Intrinsic::getDeclaration(
    M, getIntrinsicForAtomicRMWBinOp128(AI->getOperation()));
Type *Int64Ty = Type::getInt64Ty(M->getContext());
Value *IncrLo = Builder.CreateTrunc(Incr, Int64Ty, "incr_lo");
Value *IncrHi =
    Builder.CreateTrunc(Builder.CreateLShr(Incr, 64), Int64Ty, "incr_hi");
Value *Addr =
    Builder.CreateBitCast(AlignedAddr, Type::getInt8PtrTy(M->getContext()));
Value *LoHi = Builder.CreateCall(RMW, {Addr, IncrLo, IncrHi});
Value *Lo = Builder.CreateExtractValue(LoHi, 0, "lo");
Value *Hi = Builder.CreateExtractValue(LoHi, 1, "hi");
Lo = Builder.CreateZExt(Lo, ValTy, "lo64");
Hi = Builder.CreateZExt(Hi, ValTy, "hi64");
return Builder.CreateOr(
    Lo, Builder.CreateShl(Hi, ConstantInt::get(ValTy, 64)), "val64");
18496}

18498Value *PPCTargetLowering::emitMaskedAtomicCmpXchgIntrinsic(
  IRBuilderBase &Builder, AtomicCmpXchgInst *CI, Value *AlignedAddr,
  Value *CmpVal, Value *NewVal, Value *Mask, AtomicOrdering Ord) const {
assert(shouldInlineQuadwordAtomics() && "Only support quadword now")(static_cast <bool> (shouldInlineQuadwordAtomics() &&
 "Only support quadword now") ? void (0) : __assert_fail ("shouldInlineQuadwordAtomics() && \"Only support quadword now\""
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18501, __extension__
 __PRETTY_FUNCTION__));
Module *M = Builder.GetInsertBlock()->getParent()->getParent();
Type *ValTy = CmpVal->getType();
assert(ValTy->getPrimitiveSizeInBits() == 128)(static_cast <bool> (ValTy->getPrimitiveSizeInBits()
 == 128) ? void (0) : __assert_fail ("ValTy->getPrimitiveSizeInBits() == 128"
, "llvm/lib/Target/PowerPC/PPCISelLowering.cpp", 18504, __extension__
 __PRETTY_FUNCTION__));
Function *IntCmpXchg =
    Intrinsic::getDeclaration(M, Intrinsic::ppc_cmpxchg_i128);
Type *Int64Ty = Type::getInt64Ty(M->getContext());
Value *CmpLo = Builder.CreateTrunc(CmpVal, Int64Ty, "cmp_lo");
Value *CmpHi =
    Builder.CreateTrunc(Builder.CreateLShr(CmpVal, 64), Int64Ty, "cmp_hi");
Value *NewLo = Builder.CreateTrunc(NewVal, Int64Ty, "new_lo");
Value *NewHi =
    Builder.CreateTrunc(Builder.CreateLShr(NewVal, 64), Int64Ty, "new_hi");
Value *Addr =
    Builder.CreateBitCast(AlignedAddr, Type::getInt8PtrTy(M->getContext()));
emitLeadingFence(Builder, CI, Ord);
Value *LoHi =
    Builder.CreateCall(IntCmpXchg, {Addr, CmpLo, CmpHi, NewLo, NewHi});
emitTrailingFence(Builder, CI, Ord);
Value *Lo = Builder.CreateExtractValue(LoHi, 0, "lo");
Value *Hi = Builder.CreateExtractValue(LoHi, 1, "hi");
Lo = Builder.CreateZExt(Lo, ValTy, "lo64");
Hi = Builder.CreateZExt(Hi, ValTy, "hi64");
return Builder.CreateOr(
    Lo, Builder.CreateShl(Hi, ConstantInt::get(ValTy, 64)), "val64");
18526}