| File: | llvm/lib/Target/PowerPC/PPCISelLowering.cpp |
| Warning: | line 16304, column 9 Assigned value is garbage or undefined |
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| 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 | //===----------------------------------------------------------------------===// |
| 12 | |
| 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/None.h" |
| 30 | #include "llvm/ADT/STLExtras.h" |
| 31 | #include "llvm/ADT/SmallPtrSet.h" |
| 32 | #include "llvm/ADT/SmallSet.h" |
| 33 | #include "llvm/ADT/SmallVector.h" |
| 34 | #include "llvm/ADT/Statistic.h" |
| 35 | #include "llvm/ADT/StringRef.h" |
| 36 | #include "llvm/ADT/StringSwitch.h" |
| 37 | #include "llvm/CodeGen/CallingConvLower.h" |
| 38 | #include "llvm/CodeGen/ISDOpcodes.h" |
| 39 | #include "llvm/CodeGen/MachineBasicBlock.h" |
| 40 | #include "llvm/CodeGen/MachineFrameInfo.h" |
| 41 | #include "llvm/CodeGen/MachineFunction.h" |
| 42 | #include "llvm/CodeGen/MachineInstr.h" |
| 43 | #include "llvm/CodeGen/MachineInstrBuilder.h" |
| 44 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
| 45 | #include "llvm/CodeGen/MachineLoopInfo.h" |
| 46 | #include "llvm/CodeGen/MachineMemOperand.h" |
| 47 | #include "llvm/CodeGen/MachineModuleInfo.h" |
| 48 | #include "llvm/CodeGen/MachineOperand.h" |
| 49 | #include "llvm/CodeGen/MachineRegisterInfo.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/MachineValueType.h" |
| 90 | #include "llvm/Support/MathExtras.h" |
| 91 | #include "llvm/Support/raw_ostream.h" |
| 92 | #include "llvm/Target/TargetMachine.h" |
| 93 | #include "llvm/Target/TargetOptions.h" |
| 94 | #include <algorithm> |
| 95 | #include <cassert> |
| 96 | #include <cstdint> |
| 97 | #include <iterator> |
| 98 | #include <list> |
| 99 | #include <utility> |
| 100 | #include <vector> |
| 101 | |
| 102 | using namespace llvm; |
| 103 | |
| 104 | #define DEBUG_TYPE"ppc-lowering" "ppc-lowering" |
| 105 | |
| 106 | static cl::opt<bool> DisablePPCPreinc("disable-ppc-preinc", |
| 107 | cl::desc("disable preincrement load/store generation on PPC"), cl::Hidden); |
| 108 | |
| 109 | static cl::opt<bool> DisableILPPref("disable-ppc-ilp-pref", |
| 110 | cl::desc("disable setting the node scheduling preference to ILP on PPC"), cl::Hidden); |
| 111 | |
| 112 | static cl::opt<bool> DisablePPCUnaligned("disable-ppc-unaligned", |
| 113 | cl::desc("disable unaligned load/store generation on PPC"), cl::Hidden); |
| 114 | |
| 115 | static cl::opt<bool> DisableSCO("disable-ppc-sco", |
| 116 | cl::desc("disable sibling call optimization on ppc"), cl::Hidden); |
| 117 | |
| 118 | static cl::opt<bool> DisableInnermostLoopAlign32("disable-ppc-innermost-loop-align32", |
| 119 | cl::desc("don't always align innermost loop to 32 bytes on ppc"), cl::Hidden); |
| 120 | |
| 121 | static cl::opt<bool> UseAbsoluteJumpTables("ppc-use-absolute-jumptables", |
| 122 | cl::desc("use absolute jump tables on ppc"), cl::Hidden); |
| 123 | |
| 124 | static cl::opt<bool> EnableQuadwordAtomics( |
| 125 | "ppc-quadword-atomics", |
| 126 | cl::desc("enable quadword lock-free atomic operations"), cl::init(false), |
| 127 | cl::Hidden); |
| 128 | |
| 129 | STATISTIC(NumTailCalls, "Number of tail calls")static llvm::Statistic NumTailCalls = {"ppc-lowering", "NumTailCalls" , "Number of tail calls"}; |
| 130 | STATISTIC(NumSiblingCalls, "Number of sibling calls")static llvm::Statistic NumSiblingCalls = {"ppc-lowering", "NumSiblingCalls" , "Number of sibling calls"}; |
| 131 | STATISTIC(ShufflesHandledWithVPERM, "Number of shuffles lowered to a VPERM")static llvm::Statistic ShufflesHandledWithVPERM = {"ppc-lowering" , "ShufflesHandledWithVPERM", "Number of shuffles lowered to a VPERM" }; |
| 132 | STATISTIC(NumDynamicAllocaProbed, "Number of dynamic stack allocation probed")static llvm::Statistic NumDynamicAllocaProbed = {"ppc-lowering" , "NumDynamicAllocaProbed", "Number of dynamic stack allocation probed" }; |
| 133 | |
| 134 | static bool isNByteElemShuffleMask(ShuffleVectorSDNode *, unsigned, int); |
| 135 | |
| 136 | static SDValue widenVec(SelectionDAG &DAG, SDValue Vec, const SDLoc &dl); |
| 137 | |
| 138 | static const char AIXSSPCanaryWordName[] = "__ssp_canary_word"; |
| 139 | |
| 140 | // FIXME: Remove this once the bug has been fixed! |
| 141 | extern cl::opt<bool> ANDIGlueBug; |
| 142 | |
| 143 | PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM, |
| 144 | const PPCSubtarget &STI) |
| 145 | : TargetLowering(TM), Subtarget(STI) { |
| 146 | // Initialize map that relates the PPC addressing modes to the computed flags |
| 147 | // of a load/store instruction. The map is used to determine the optimal |
| 148 | // addressing mode when selecting load and stores. |
| 149 | initializeAddrModeMap(); |
| 150 | // On PPC32/64, arguments smaller than 4/8 bytes are extended, so all |
| 151 | // arguments are at least 4/8 bytes aligned. |
| 152 | bool isPPC64 = Subtarget.isPPC64(); |
| 153 | setMinStackArgumentAlignment(isPPC64 ? Align(8) : Align(4)); |
| 154 | |
| 155 | // Set up the register classes. |
| 156 | addRegisterClass(MVT::i32, &PPC::GPRCRegClass); |
| 157 | if (!useSoftFloat()) { |
| 158 | if (hasSPE()) { |
| 159 | addRegisterClass(MVT::f32, &PPC::GPRCRegClass); |
| 160 | // EFPU2 APU only supports f32 |
| 161 | if (!Subtarget.hasEFPU2()) |
| 162 | addRegisterClass(MVT::f64, &PPC::SPERCRegClass); |
| 163 | } else { |
| 164 | addRegisterClass(MVT::f32, &PPC::F4RCRegClass); |
| 165 | addRegisterClass(MVT::f64, &PPC::F8RCRegClass); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | // Match BITREVERSE to customized fast code sequence in the td file. |
| 170 | setOperationAction(ISD::BITREVERSE, MVT::i32, Legal); |
| 171 | setOperationAction(ISD::BITREVERSE, MVT::i64, Legal); |
| 172 | |
| 173 | // Sub-word ATOMIC_CMP_SWAP need to ensure that the input is zero-extended. |
| 174 | setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Custom); |
| 175 | |
| 176 | // Custom lower inline assembly to check for special registers. |
| 177 | setOperationAction(ISD::INLINEASM, MVT::Other, Custom); |
| 178 | setOperationAction(ISD::INLINEASM_BR, MVT::Other, Custom); |
| 179 | |
| 180 | // PowerPC has an i16 but no i8 (or i1) SEXTLOAD. |
| 181 | for (MVT VT : MVT::integer_valuetypes()) { |
| 182 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote); |
| 183 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i8, Expand); |
| 184 | } |
| 185 | |
| 186 | if (Subtarget.isISA3_0()) { |
| 187 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f16, Legal); |
| 188 | setLoadExtAction(ISD::EXTLOAD, MVT::f32, MVT::f16, Legal); |
| 189 | setTruncStoreAction(MVT::f64, MVT::f16, Legal); |
| 190 | setTruncStoreAction(MVT::f32, MVT::f16, Legal); |
| 191 | } else { |
| 192 | // No extending loads from f16 or HW conversions back and forth. |
| 193 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f16, Expand); |
| 194 | setOperationAction(ISD::FP16_TO_FP, MVT::f64, Expand); |
| 195 | setOperationAction(ISD::FP_TO_FP16, MVT::f64, Expand); |
| 196 | setLoadExtAction(ISD::EXTLOAD, MVT::f32, MVT::f16, Expand); |
| 197 | setOperationAction(ISD::FP16_TO_FP, MVT::f32, Expand); |
| 198 | setOperationAction(ISD::FP_TO_FP16, MVT::f32, Expand); |
| 199 | setTruncStoreAction(MVT::f64, MVT::f16, Expand); |
| 200 | setTruncStoreAction(MVT::f32, MVT::f16, Expand); |
| 201 | } |
| 202 | |
| 203 | setTruncStoreAction(MVT::f64, MVT::f32, Expand); |
| 204 | |
| 205 | // PowerPC has pre-inc load and store's. |
| 206 | setIndexedLoadAction(ISD::PRE_INC, MVT::i1, Legal); |
| 207 | setIndexedLoadAction(ISD::PRE_INC, MVT::i8, Legal); |
| 208 | setIndexedLoadAction(ISD::PRE_INC, MVT::i16, Legal); |
| 209 | setIndexedLoadAction(ISD::PRE_INC, MVT::i32, Legal); |
| 210 | setIndexedLoadAction(ISD::PRE_INC, MVT::i64, Legal); |
| 211 | setIndexedStoreAction(ISD::PRE_INC, MVT::i1, Legal); |
| 212 | setIndexedStoreAction(ISD::PRE_INC, MVT::i8, Legal); |
| 213 | setIndexedStoreAction(ISD::PRE_INC, MVT::i16, Legal); |
| 214 | setIndexedStoreAction(ISD::PRE_INC, MVT::i32, Legal); |
| 215 | setIndexedStoreAction(ISD::PRE_INC, MVT::i64, Legal); |
| 216 | if (!Subtarget.hasSPE()) { |
| 217 | setIndexedLoadAction(ISD::PRE_INC, MVT::f32, Legal); |
| 218 | setIndexedLoadAction(ISD::PRE_INC, MVT::f64, Legal); |
| 219 | setIndexedStoreAction(ISD::PRE_INC, MVT::f32, Legal); |
| 220 | setIndexedStoreAction(ISD::PRE_INC, MVT::f64, Legal); |
| 221 | } |
| 222 | |
| 223 | // PowerPC uses ADDC/ADDE/SUBC/SUBE to propagate carry. |
| 224 | const MVT ScalarIntVTs[] = { MVT::i32, MVT::i64 }; |
| 225 | for (MVT VT : ScalarIntVTs) { |
| 226 | setOperationAction(ISD::ADDC, VT, Legal); |
| 227 | setOperationAction(ISD::ADDE, VT, Legal); |
| 228 | setOperationAction(ISD::SUBC, VT, Legal); |
| 229 | setOperationAction(ISD::SUBE, VT, Legal); |
| 230 | } |
| 231 | |
| 232 | if (Subtarget.useCRBits()) { |
| 233 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand); |
| 234 | |
| 235 | if (isPPC64 || Subtarget.hasFPCVT()) { |
| 236 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i1, Promote); |
| 237 | AddPromotedToType(ISD::STRICT_SINT_TO_FP, MVT::i1, |
| 238 | isPPC64 ? MVT::i64 : MVT::i32); |
| 239 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i1, Promote); |
| 240 | AddPromotedToType(ISD::STRICT_UINT_TO_FP, MVT::i1, |
| 241 | isPPC64 ? MVT::i64 : MVT::i32); |
| 242 | |
| 243 | setOperationAction(ISD::SINT_TO_FP, MVT::i1, Promote); |
| 244 | AddPromotedToType (ISD::SINT_TO_FP, MVT::i1, |
| 245 | isPPC64 ? MVT::i64 : MVT::i32); |
| 246 | setOperationAction(ISD::UINT_TO_FP, MVT::i1, Promote); |
| 247 | AddPromotedToType(ISD::UINT_TO_FP, MVT::i1, |
| 248 | isPPC64 ? MVT::i64 : MVT::i32); |
| 249 | |
| 250 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i1, Promote); |
| 251 | AddPromotedToType(ISD::STRICT_FP_TO_SINT, MVT::i1, |
| 252 | isPPC64 ? MVT::i64 : MVT::i32); |
| 253 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i1, Promote); |
| 254 | AddPromotedToType(ISD::STRICT_FP_TO_UINT, MVT::i1, |
| 255 | isPPC64 ? MVT::i64 : MVT::i32); |
| 256 | |
| 257 | setOperationAction(ISD::FP_TO_SINT, MVT::i1, Promote); |
| 258 | AddPromotedToType(ISD::FP_TO_SINT, MVT::i1, |
| 259 | isPPC64 ? MVT::i64 : MVT::i32); |
| 260 | setOperationAction(ISD::FP_TO_UINT, MVT::i1, Promote); |
| 261 | AddPromotedToType(ISD::FP_TO_UINT, MVT::i1, |
| 262 | isPPC64 ? MVT::i64 : MVT::i32); |
| 263 | } else { |
| 264 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i1, Custom); |
| 265 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i1, Custom); |
| 266 | setOperationAction(ISD::SINT_TO_FP, MVT::i1, Custom); |
| 267 | setOperationAction(ISD::UINT_TO_FP, MVT::i1, Custom); |
| 268 | } |
| 269 | |
| 270 | // PowerPC does not support direct load/store of condition registers. |
| 271 | setOperationAction(ISD::LOAD, MVT::i1, Custom); |
| 272 | setOperationAction(ISD::STORE, MVT::i1, Custom); |
| 273 | |
| 274 | // FIXME: Remove this once the ANDI glue bug is fixed: |
| 275 | if (ANDIGlueBug) |
| 276 | setOperationAction(ISD::TRUNCATE, MVT::i1, Custom); |
| 277 | |
| 278 | for (MVT VT : MVT::integer_valuetypes()) { |
| 279 | setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote); |
| 280 | setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i1, Promote); |
| 281 | setTruncStoreAction(VT, MVT::i1, Expand); |
| 282 | } |
| 283 | |
| 284 | addRegisterClass(MVT::i1, &PPC::CRBITRCRegClass); |
| 285 | } |
| 286 | |
| 287 | // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on |
| 288 | // PPC (the libcall is not available). |
| 289 | setOperationAction(ISD::FP_TO_SINT, MVT::ppcf128, Custom); |
| 290 | setOperationAction(ISD::FP_TO_UINT, MVT::ppcf128, Custom); |
| 291 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::ppcf128, Custom); |
| 292 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::ppcf128, Custom); |
| 293 | |
| 294 | // We do not currently implement these libm ops for PowerPC. |
| 295 | setOperationAction(ISD::FFLOOR, MVT::ppcf128, Expand); |
| 296 | setOperationAction(ISD::FCEIL, MVT::ppcf128, Expand); |
| 297 | setOperationAction(ISD::FTRUNC, MVT::ppcf128, Expand); |
| 298 | setOperationAction(ISD::FRINT, MVT::ppcf128, Expand); |
| 299 | setOperationAction(ISD::FNEARBYINT, MVT::ppcf128, Expand); |
| 300 | setOperationAction(ISD::FREM, MVT::ppcf128, Expand); |
| 301 | |
| 302 | // PowerPC has no SREM/UREM instructions unless we are on P9 |
| 303 | // On P9 we may use a hardware instruction to compute the remainder. |
| 304 | // When the result of both the remainder and the division is required it is |
| 305 | // more efficient to compute the remainder from the result of the division |
| 306 | // rather than use the remainder instruction. The instructions are legalized |
| 307 | // directly because the DivRemPairsPass performs the transformation at the IR |
| 308 | // level. |
| 309 | if (Subtarget.isISA3_0()) { |
| 310 | setOperationAction(ISD::SREM, MVT::i32, Legal); |
| 311 | setOperationAction(ISD::UREM, MVT::i32, Legal); |
| 312 | setOperationAction(ISD::SREM, MVT::i64, Legal); |
| 313 | setOperationAction(ISD::UREM, MVT::i64, Legal); |
| 314 | } else { |
| 315 | setOperationAction(ISD::SREM, MVT::i32, Expand); |
| 316 | setOperationAction(ISD::UREM, MVT::i32, Expand); |
| 317 | setOperationAction(ISD::SREM, MVT::i64, Expand); |
| 318 | setOperationAction(ISD::UREM, MVT::i64, Expand); |
| 319 | } |
| 320 | |
| 321 | // Don't use SMUL_LOHI/UMUL_LOHI or SDIVREM/UDIVREM to lower SREM/UREM. |
| 322 | setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand); |
| 323 | setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand); |
| 324 | setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand); |
| 325 | setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand); |
| 326 | setOperationAction(ISD::UDIVREM, MVT::i32, Expand); |
| 327 | setOperationAction(ISD::SDIVREM, MVT::i32, Expand); |
| 328 | setOperationAction(ISD::UDIVREM, MVT::i64, Expand); |
| 329 | setOperationAction(ISD::SDIVREM, MVT::i64, Expand); |
| 330 | |
| 331 | // Handle constrained floating-point operations of scalar. |
| 332 | // TODO: Handle SPE specific operation. |
| 333 | setOperationAction(ISD::STRICT_FADD, MVT::f32, Legal); |
| 334 | setOperationAction(ISD::STRICT_FSUB, MVT::f32, Legal); |
| 335 | setOperationAction(ISD::STRICT_FMUL, MVT::f32, Legal); |
| 336 | setOperationAction(ISD::STRICT_FDIV, MVT::f32, Legal); |
| 337 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Legal); |
| 338 | |
| 339 | setOperationAction(ISD::STRICT_FADD, MVT::f64, Legal); |
| 340 | setOperationAction(ISD::STRICT_FSUB, MVT::f64, Legal); |
| 341 | setOperationAction(ISD::STRICT_FMUL, MVT::f64, Legal); |
| 342 | setOperationAction(ISD::STRICT_FDIV, MVT::f64, Legal); |
| 343 | |
| 344 | if (!Subtarget.hasSPE()) { |
| 345 | setOperationAction(ISD::STRICT_FMA, MVT::f32, Legal); |
| 346 | setOperationAction(ISD::STRICT_FMA, MVT::f64, Legal); |
| 347 | } |
| 348 | |
| 349 | if (Subtarget.hasVSX()) { |
| 350 | setOperationAction(ISD::STRICT_FRINT, MVT::f32, Legal); |
| 351 | setOperationAction(ISD::STRICT_FRINT, MVT::f64, Legal); |
| 352 | } |
| 353 | |
| 354 | if (Subtarget.hasFSQRT()) { |
| 355 | setOperationAction(ISD::STRICT_FSQRT, MVT::f32, Legal); |
| 356 | setOperationAction(ISD::STRICT_FSQRT, MVT::f64, Legal); |
| 357 | } |
| 358 | |
| 359 | if (Subtarget.hasFPRND()) { |
| 360 | setOperationAction(ISD::STRICT_FFLOOR, MVT::f32, Legal); |
| 361 | setOperationAction(ISD::STRICT_FCEIL, MVT::f32, Legal); |
| 362 | setOperationAction(ISD::STRICT_FTRUNC, MVT::f32, Legal); |
| 363 | setOperationAction(ISD::STRICT_FROUND, MVT::f32, Legal); |
| 364 | |
| 365 | setOperationAction(ISD::STRICT_FFLOOR, MVT::f64, Legal); |
| 366 | setOperationAction(ISD::STRICT_FCEIL, MVT::f64, Legal); |
| 367 | setOperationAction(ISD::STRICT_FTRUNC, MVT::f64, Legal); |
| 368 | setOperationAction(ISD::STRICT_FROUND, MVT::f64, Legal); |
| 369 | } |
| 370 | |
| 371 | // We don't support sin/cos/sqrt/fmod/pow |
| 372 | setOperationAction(ISD::FSIN , MVT::f64, Expand); |
| 373 | setOperationAction(ISD::FCOS , MVT::f64, Expand); |
| 374 | setOperationAction(ISD::FSINCOS, MVT::f64, Expand); |
| 375 | setOperationAction(ISD::FREM , MVT::f64, Expand); |
| 376 | setOperationAction(ISD::FPOW , MVT::f64, Expand); |
| 377 | setOperationAction(ISD::FSIN , MVT::f32, Expand); |
| 378 | setOperationAction(ISD::FCOS , MVT::f32, Expand); |
| 379 | setOperationAction(ISD::FSINCOS, MVT::f32, Expand); |
| 380 | setOperationAction(ISD::FREM , MVT::f32, Expand); |
| 381 | setOperationAction(ISD::FPOW , MVT::f32, Expand); |
| 382 | if (Subtarget.hasSPE()) { |
| 383 | setOperationAction(ISD::FMA , MVT::f64, Expand); |
| 384 | setOperationAction(ISD::FMA , MVT::f32, Expand); |
| 385 | } else { |
| 386 | setOperationAction(ISD::FMA , MVT::f64, Legal); |
| 387 | setOperationAction(ISD::FMA , MVT::f32, Legal); |
| 388 | } |
| 389 | |
| 390 | if (Subtarget.hasSPE()) |
| 391 | setLoadExtAction(ISD::EXTLOAD, MVT::f64, MVT::f32, Expand); |
| 392 | |
| 393 | setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom); |
| 394 | |
| 395 | // If we're enabling GP optimizations, use hardware square root |
| 396 | if (!Subtarget.hasFSQRT() && |
| 397 | !(TM.Options.UnsafeFPMath && Subtarget.hasFRSQRTE() && |
| 398 | Subtarget.hasFRE())) |
| 399 | setOperationAction(ISD::FSQRT, MVT::f64, Expand); |
| 400 | |
| 401 | if (!Subtarget.hasFSQRT() && |
| 402 | !(TM.Options.UnsafeFPMath && Subtarget.hasFRSQRTES() && |
| 403 | Subtarget.hasFRES())) |
| 404 | setOperationAction(ISD::FSQRT, MVT::f32, Expand); |
| 405 | |
| 406 | if (Subtarget.hasFCPSGN()) { |
| 407 | setOperationAction(ISD::FCOPYSIGN, MVT::f64, Legal); |
| 408 | setOperationAction(ISD::FCOPYSIGN, MVT::f32, Legal); |
| 409 | } else { |
| 410 | setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand); |
| 411 | setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand); |
| 412 | } |
| 413 | |
| 414 | if (Subtarget.hasFPRND()) { |
| 415 | setOperationAction(ISD::FFLOOR, MVT::f64, Legal); |
| 416 | setOperationAction(ISD::FCEIL, MVT::f64, Legal); |
| 417 | setOperationAction(ISD::FTRUNC, MVT::f64, Legal); |
| 418 | setOperationAction(ISD::FROUND, MVT::f64, Legal); |
| 419 | |
| 420 | setOperationAction(ISD::FFLOOR, MVT::f32, Legal); |
| 421 | setOperationAction(ISD::FCEIL, MVT::f32, Legal); |
| 422 | setOperationAction(ISD::FTRUNC, MVT::f32, Legal); |
| 423 | setOperationAction(ISD::FROUND, MVT::f32, Legal); |
| 424 | } |
| 425 | |
| 426 | // PowerPC does not have BSWAP, but we can use vector BSWAP instruction xxbrd |
| 427 | // to speed up scalar BSWAP64. |
| 428 | // CTPOP or CTTZ were introduced in P8/P9 respectively |
| 429 | setOperationAction(ISD::BSWAP, MVT::i32 , Expand); |
| 430 | if (Subtarget.hasP9Vector() && Subtarget.isPPC64()) |
| 431 | setOperationAction(ISD::BSWAP, MVT::i64 , Custom); |
| 432 | else |
| 433 | setOperationAction(ISD::BSWAP, MVT::i64 , Expand); |
| 434 | if (Subtarget.isISA3_0()) { |
| 435 | setOperationAction(ISD::CTTZ , MVT::i32 , Legal); |
| 436 | setOperationAction(ISD::CTTZ , MVT::i64 , Legal); |
| 437 | } else { |
| 438 | setOperationAction(ISD::CTTZ , MVT::i32 , Expand); |
| 439 | setOperationAction(ISD::CTTZ , MVT::i64 , Expand); |
| 440 | } |
| 441 | |
| 442 | if (Subtarget.hasPOPCNTD() == PPCSubtarget::POPCNTD_Fast) { |
| 443 | setOperationAction(ISD::CTPOP, MVT::i32 , Legal); |
| 444 | setOperationAction(ISD::CTPOP, MVT::i64 , Legal); |
| 445 | } else { |
| 446 | setOperationAction(ISD::CTPOP, MVT::i32 , Expand); |
| 447 | setOperationAction(ISD::CTPOP, MVT::i64 , Expand); |
| 448 | } |
| 449 | |
| 450 | // PowerPC does not have ROTR |
| 451 | setOperationAction(ISD::ROTR, MVT::i32 , Expand); |
| 452 | setOperationAction(ISD::ROTR, MVT::i64 , Expand); |
| 453 | |
| 454 | if (!Subtarget.useCRBits()) { |
| 455 | // PowerPC does not have Select |
| 456 | setOperationAction(ISD::SELECT, MVT::i32, Expand); |
| 457 | setOperationAction(ISD::SELECT, MVT::i64, Expand); |
| 458 | setOperationAction(ISD::SELECT, MVT::f32, Expand); |
| 459 | setOperationAction(ISD::SELECT, MVT::f64, Expand); |
| 460 | } |
| 461 | |
| 462 | // PowerPC wants to turn select_cc of FP into fsel when possible. |
| 463 | setOperationAction(ISD::SELECT_CC, MVT::f32, Custom); |
| 464 | setOperationAction(ISD::SELECT_CC, MVT::f64, Custom); |
| 465 | |
| 466 | // PowerPC wants to optimize integer setcc a bit |
| 467 | if (!Subtarget.useCRBits()) |
| 468 | setOperationAction(ISD::SETCC, MVT::i32, Custom); |
| 469 | |
| 470 | if (Subtarget.hasFPU()) { |
| 471 | setOperationAction(ISD::STRICT_FSETCC, MVT::f32, Legal); |
| 472 | setOperationAction(ISD::STRICT_FSETCC, MVT::f64, Legal); |
| 473 | setOperationAction(ISD::STRICT_FSETCC, MVT::f128, Legal); |
| 474 | |
| 475 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f32, Legal); |
| 476 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f64, Legal); |
| 477 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f128, Legal); |
| 478 | } |
| 479 | |
| 480 | // PowerPC does not have BRCOND which requires SetCC |
| 481 | if (!Subtarget.useCRBits()) |
| 482 | setOperationAction(ISD::BRCOND, MVT::Other, Expand); |
| 483 | |
| 484 | setOperationAction(ISD::BR_JT, MVT::Other, Expand); |
| 485 | |
| 486 | if (Subtarget.hasSPE()) { |
| 487 | // SPE has built-in conversions |
| 488 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Legal); |
| 489 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Legal); |
| 490 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i32, Legal); |
| 491 | setOperationAction(ISD::FP_TO_SINT, MVT::i32, Legal); |
| 492 | setOperationAction(ISD::SINT_TO_FP, MVT::i32, Legal); |
| 493 | setOperationAction(ISD::UINT_TO_FP, MVT::i32, Legal); |
| 494 | |
| 495 | // SPE supports signaling compare of f32/f64. |
| 496 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f32, Legal); |
| 497 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f64, Legal); |
| 498 | } else { |
| 499 | // PowerPC turns FP_TO_SINT into FCTIWZ and some load/stores. |
| 500 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Custom); |
| 501 | setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom); |
| 502 | |
| 503 | // PowerPC does not have [U|S]INT_TO_FP |
| 504 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Expand); |
| 505 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i32, Expand); |
| 506 | setOperationAction(ISD::SINT_TO_FP, MVT::i32, Expand); |
| 507 | setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand); |
| 508 | } |
| 509 | |
| 510 | if (Subtarget.hasDirectMove() && isPPC64) { |
| 511 | setOperationAction(ISD::BITCAST, MVT::f32, Legal); |
| 512 | setOperationAction(ISD::BITCAST, MVT::i32, Legal); |
| 513 | setOperationAction(ISD::BITCAST, MVT::i64, Legal); |
| 514 | setOperationAction(ISD::BITCAST, MVT::f64, Legal); |
| 515 | if (TM.Options.UnsafeFPMath) { |
| 516 | setOperationAction(ISD::LRINT, MVT::f64, Legal); |
| 517 | setOperationAction(ISD::LRINT, MVT::f32, Legal); |
| 518 | setOperationAction(ISD::LLRINT, MVT::f64, Legal); |
| 519 | setOperationAction(ISD::LLRINT, MVT::f32, Legal); |
| 520 | setOperationAction(ISD::LROUND, MVT::f64, Legal); |
| 521 | setOperationAction(ISD::LROUND, MVT::f32, Legal); |
| 522 | setOperationAction(ISD::LLROUND, MVT::f64, Legal); |
| 523 | setOperationAction(ISD::LLROUND, MVT::f32, Legal); |
| 524 | } |
| 525 | } else { |
| 526 | setOperationAction(ISD::BITCAST, MVT::f32, Expand); |
| 527 | setOperationAction(ISD::BITCAST, MVT::i32, Expand); |
| 528 | setOperationAction(ISD::BITCAST, MVT::i64, Expand); |
| 529 | setOperationAction(ISD::BITCAST, MVT::f64, Expand); |
| 530 | } |
| 531 | |
| 532 | // We cannot sextinreg(i1). Expand to shifts. |
| 533 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand); |
| 534 | |
| 535 | // NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intended to support |
| 536 | // SjLj exception handling but a light-weight setjmp/longjmp replacement to |
| 537 | // support continuation, user-level threading, and etc.. As a result, no |
| 538 | // other SjLj exception interfaces are implemented and please don't build |
| 539 | // your own exception handling based on them. |
| 540 | // LLVM/Clang supports zero-cost DWARF exception handling. |
| 541 | setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom); |
| 542 | setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom); |
| 543 | |
| 544 | // We want to legalize GlobalAddress and ConstantPool nodes into the |
| 545 | // appropriate instructions to materialize the address. |
| 546 | setOperationAction(ISD::GlobalAddress, MVT::i32, Custom); |
| 547 | setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom); |
| 548 | setOperationAction(ISD::BlockAddress, MVT::i32, Custom); |
| 549 | setOperationAction(ISD::ConstantPool, MVT::i32, Custom); |
| 550 | setOperationAction(ISD::JumpTable, MVT::i32, Custom); |
| 551 | setOperationAction(ISD::GlobalAddress, MVT::i64, Custom); |
| 552 | setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom); |
| 553 | setOperationAction(ISD::BlockAddress, MVT::i64, Custom); |
| 554 | setOperationAction(ISD::ConstantPool, MVT::i64, Custom); |
| 555 | setOperationAction(ISD::JumpTable, MVT::i64, Custom); |
| 556 | |
| 557 | // TRAP is legal. |
| 558 | setOperationAction(ISD::TRAP, MVT::Other, Legal); |
| 559 | |
| 560 | // TRAMPOLINE is custom lowered. |
| 561 | setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom); |
| 562 | setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom); |
| 563 | |
| 564 | // VASTART needs to be custom lowered to use the VarArgsFrameIndex |
| 565 | setOperationAction(ISD::VASTART , MVT::Other, Custom); |
| 566 | |
| 567 | if (Subtarget.is64BitELFABI()) { |
| 568 | // VAARG always uses double-word chunks, so promote anything smaller. |
| 569 | setOperationAction(ISD::VAARG, MVT::i1, Promote); |
| 570 | AddPromotedToType(ISD::VAARG, MVT::i1, MVT::i64); |
| 571 | setOperationAction(ISD::VAARG, MVT::i8, Promote); |
| 572 | AddPromotedToType(ISD::VAARG, MVT::i8, MVT::i64); |
| 573 | setOperationAction(ISD::VAARG, MVT::i16, Promote); |
| 574 | AddPromotedToType(ISD::VAARG, MVT::i16, MVT::i64); |
| 575 | setOperationAction(ISD::VAARG, MVT::i32, Promote); |
| 576 | AddPromotedToType(ISD::VAARG, MVT::i32, MVT::i64); |
| 577 | setOperationAction(ISD::VAARG, MVT::Other, Expand); |
| 578 | } else if (Subtarget.is32BitELFABI()) { |
| 579 | // VAARG is custom lowered with the 32-bit SVR4 ABI. |
| 580 | setOperationAction(ISD::VAARG, MVT::Other, Custom); |
| 581 | setOperationAction(ISD::VAARG, MVT::i64, Custom); |
| 582 | } else |
| 583 | setOperationAction(ISD::VAARG, MVT::Other, Expand); |
| 584 | |
| 585 | // VACOPY is custom lowered with the 32-bit SVR4 ABI. |
| 586 | if (Subtarget.is32BitELFABI()) |
| 587 | setOperationAction(ISD::VACOPY , MVT::Other, Custom); |
| 588 | else |
| 589 | setOperationAction(ISD::VACOPY , MVT::Other, Expand); |
| 590 | |
| 591 | // Use the default implementation. |
| 592 | setOperationAction(ISD::VAEND , MVT::Other, Expand); |
| 593 | setOperationAction(ISD::STACKSAVE , MVT::Other, Expand); |
| 594 | setOperationAction(ISD::STACKRESTORE , MVT::Other, Custom); |
| 595 | setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom); |
| 596 | setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64 , Custom); |
| 597 | setOperationAction(ISD::GET_DYNAMIC_AREA_OFFSET, MVT::i32, Custom); |
| 598 | setOperationAction(ISD::GET_DYNAMIC_AREA_OFFSET, MVT::i64, Custom); |
| 599 | setOperationAction(ISD::EH_DWARF_CFA, MVT::i32, Custom); |
| 600 | setOperationAction(ISD::EH_DWARF_CFA, MVT::i64, Custom); |
| 601 | |
| 602 | // We want to custom lower some of our intrinsics. |
| 603 | setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom); |
| 604 | |
| 605 | // To handle counter-based loop conditions. |
| 606 | setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i1, Custom); |
| 607 | |
| 608 | setOperationAction(ISD::INTRINSIC_VOID, MVT::i8, Custom); |
| 609 | setOperationAction(ISD::INTRINSIC_VOID, MVT::i16, Custom); |
| 610 | setOperationAction(ISD::INTRINSIC_VOID, MVT::i32, Custom); |
| 611 | setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom); |
| 612 | |
| 613 | // Comparisons that require checking two conditions. |
| 614 | if (Subtarget.hasSPE()) { |
| 615 | setCondCodeAction(ISD::SETO, MVT::f32, Expand); |
| 616 | setCondCodeAction(ISD::SETO, MVT::f64, Expand); |
| 617 | setCondCodeAction(ISD::SETUO, MVT::f32, Expand); |
| 618 | setCondCodeAction(ISD::SETUO, MVT::f64, Expand); |
| 619 | } |
| 620 | setCondCodeAction(ISD::SETULT, MVT::f32, Expand); |
| 621 | setCondCodeAction(ISD::SETULT, MVT::f64, Expand); |
| 622 | setCondCodeAction(ISD::SETUGT, MVT::f32, Expand); |
| 623 | setCondCodeAction(ISD::SETUGT, MVT::f64, Expand); |
| 624 | setCondCodeAction(ISD::SETUEQ, MVT::f32, Expand); |
| 625 | setCondCodeAction(ISD::SETUEQ, MVT::f64, Expand); |
| 626 | setCondCodeAction(ISD::SETOGE, MVT::f32, Expand); |
| 627 | setCondCodeAction(ISD::SETOGE, MVT::f64, Expand); |
| 628 | setCondCodeAction(ISD::SETOLE, MVT::f32, Expand); |
| 629 | setCondCodeAction(ISD::SETOLE, MVT::f64, Expand); |
| 630 | setCondCodeAction(ISD::SETONE, MVT::f32, Expand); |
| 631 | setCondCodeAction(ISD::SETONE, MVT::f64, Expand); |
| 632 | |
| 633 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f32, Legal); |
| 634 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f64, Legal); |
| 635 | |
| 636 | if (Subtarget.has64BitSupport()) { |
| 637 | // They also have instructions for converting between i64 and fp. |
| 638 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i64, Custom); |
| 639 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i64, Expand); |
| 640 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i64, Custom); |
| 641 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i64, Expand); |
| 642 | setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom); |
| 643 | setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand); |
| 644 | setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom); |
| 645 | setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand); |
| 646 | // This is just the low 32 bits of a (signed) fp->i64 conversion. |
| 647 | // We cannot do this with Promote because i64 is not a legal type. |
| 648 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Custom); |
| 649 | setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom); |
| 650 | |
| 651 | if (Subtarget.hasLFIWAX() || Subtarget.isPPC64()) { |
| 652 | setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom); |
| 653 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Custom); |
| 654 | } |
| 655 | } else { |
| 656 | // PowerPC does not have FP_TO_UINT on 32-bit implementations. |
| 657 | if (Subtarget.hasSPE()) { |
| 658 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Legal); |
| 659 | setOperationAction(ISD::FP_TO_UINT, MVT::i32, Legal); |
| 660 | } else { |
| 661 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Expand); |
| 662 | setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand); |
| 663 | } |
| 664 | } |
| 665 | |
| 666 | // With the instructions enabled under FPCVT, we can do everything. |
| 667 | if (Subtarget.hasFPCVT()) { |
| 668 | if (Subtarget.has64BitSupport()) { |
| 669 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i64, Custom); |
| 670 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i64, Custom); |
| 671 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i64, Custom); |
| 672 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i64, Custom); |
| 673 | setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom); |
| 674 | setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom); |
| 675 | setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom); |
| 676 | setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom); |
| 677 | } |
| 678 | |
| 679 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::i32, Custom); |
| 680 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::i32, Custom); |
| 681 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::i32, Custom); |
| 682 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::i32, Custom); |
| 683 | setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom); |
| 684 | setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom); |
| 685 | setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom); |
| 686 | setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom); |
| 687 | } |
| 688 | |
| 689 | if (Subtarget.use64BitRegs()) { |
| 690 | // 64-bit PowerPC implementations can support i64 types directly |
| 691 | addRegisterClass(MVT::i64, &PPC::G8RCRegClass); |
| 692 | // BUILD_PAIR can't be handled natively, and should be expanded to shl/or |
| 693 | setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand); |
| 694 | // 64-bit PowerPC wants to expand i128 shifts itself. |
| 695 | setOperationAction(ISD::SHL_PARTS, MVT::i64, Custom); |
| 696 | setOperationAction(ISD::SRA_PARTS, MVT::i64, Custom); |
| 697 | setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom); |
| 698 | } else { |
| 699 | // 32-bit PowerPC wants to expand i64 shifts itself. |
| 700 | setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom); |
| 701 | setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom); |
| 702 | setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom); |
| 703 | } |
| 704 | |
| 705 | // PowerPC has better expansions for funnel shifts than the generic |
| 706 | // TargetLowering::expandFunnelShift. |
| 707 | if (Subtarget.has64BitSupport()) { |
| 708 | setOperationAction(ISD::FSHL, MVT::i64, Custom); |
| 709 | setOperationAction(ISD::FSHR, MVT::i64, Custom); |
| 710 | } |
| 711 | setOperationAction(ISD::FSHL, MVT::i32, Custom); |
| 712 | setOperationAction(ISD::FSHR, MVT::i32, Custom); |
| 713 | |
| 714 | if (Subtarget.hasVSX()) { |
| 715 | setOperationAction(ISD::FMAXNUM_IEEE, MVT::f64, Legal); |
| 716 | setOperationAction(ISD::FMAXNUM_IEEE, MVT::f32, Legal); |
| 717 | setOperationAction(ISD::FMINNUM_IEEE, MVT::f64, Legal); |
| 718 | setOperationAction(ISD::FMINNUM_IEEE, MVT::f32, Legal); |
| 719 | } |
| 720 | |
| 721 | if (Subtarget.hasAltivec()) { |
| 722 | for (MVT VT : { MVT::v16i8, MVT::v8i16, MVT::v4i32 }) { |
| 723 | setOperationAction(ISD::SADDSAT, VT, Legal); |
| 724 | setOperationAction(ISD::SSUBSAT, VT, Legal); |
| 725 | setOperationAction(ISD::UADDSAT, VT, Legal); |
| 726 | setOperationAction(ISD::USUBSAT, VT, Legal); |
| 727 | } |
| 728 | // First set operation action for all vector types to expand. Then we |
| 729 | // will selectively turn on ones that can be effectively codegen'd. |
| 730 | for (MVT VT : MVT::fixedlen_vector_valuetypes()) { |
| 731 | // add/sub are legal for all supported vector VT's. |
| 732 | setOperationAction(ISD::ADD, VT, Legal); |
| 733 | setOperationAction(ISD::SUB, VT, Legal); |
| 734 | |
| 735 | // For v2i64, these are only valid with P8Vector. This is corrected after |
| 736 | // the loop. |
| 737 | if (VT.getSizeInBits() <= 128 && VT.getScalarSizeInBits() <= 64) { |
| 738 | setOperationAction(ISD::SMAX, VT, Legal); |
| 739 | setOperationAction(ISD::SMIN, VT, Legal); |
| 740 | setOperationAction(ISD::UMAX, VT, Legal); |
| 741 | setOperationAction(ISD::UMIN, VT, Legal); |
| 742 | } |
| 743 | else { |
| 744 | setOperationAction(ISD::SMAX, VT, Expand); |
| 745 | setOperationAction(ISD::SMIN, VT, Expand); |
| 746 | setOperationAction(ISD::UMAX, VT, Expand); |
| 747 | setOperationAction(ISD::UMIN, VT, Expand); |
| 748 | } |
| 749 | |
| 750 | if (Subtarget.hasVSX()) { |
| 751 | setOperationAction(ISD::FMAXNUM, VT, Legal); |
| 752 | setOperationAction(ISD::FMINNUM, VT, Legal); |
| 753 | } |
| 754 | |
| 755 | // Vector instructions introduced in P8 |
| 756 | if (Subtarget.hasP8Altivec() && (VT.SimpleTy != MVT::v1i128)) { |
| 757 | setOperationAction(ISD::CTPOP, VT, Legal); |
| 758 | setOperationAction(ISD::CTLZ, VT, Legal); |
| 759 | } |
| 760 | else { |
| 761 | setOperationAction(ISD::CTPOP, VT, Expand); |
| 762 | setOperationAction(ISD::CTLZ, VT, Expand); |
| 763 | } |
| 764 | |
| 765 | // Vector instructions introduced in P9 |
| 766 | if (Subtarget.hasP9Altivec() && (VT.SimpleTy != MVT::v1i128)) |
| 767 | setOperationAction(ISD::CTTZ, VT, Legal); |
| 768 | else |
| 769 | setOperationAction(ISD::CTTZ, VT, Expand); |
| 770 | |
| 771 | // We promote all shuffles to v16i8. |
| 772 | setOperationAction(ISD::VECTOR_SHUFFLE, VT, Promote); |
| 773 | AddPromotedToType (ISD::VECTOR_SHUFFLE, VT, MVT::v16i8); |
| 774 | |
| 775 | // We promote all non-typed operations to v4i32. |
| 776 | setOperationAction(ISD::AND , VT, Promote); |
| 777 | AddPromotedToType (ISD::AND , VT, MVT::v4i32); |
| 778 | setOperationAction(ISD::OR , VT, Promote); |
| 779 | AddPromotedToType (ISD::OR , VT, MVT::v4i32); |
| 780 | setOperationAction(ISD::XOR , VT, Promote); |
| 781 | AddPromotedToType (ISD::XOR , VT, MVT::v4i32); |
| 782 | setOperationAction(ISD::LOAD , VT, Promote); |
| 783 | AddPromotedToType (ISD::LOAD , VT, MVT::v4i32); |
| 784 | setOperationAction(ISD::SELECT, VT, Promote); |
| 785 | AddPromotedToType (ISD::SELECT, VT, MVT::v4i32); |
| 786 | setOperationAction(ISD::VSELECT, VT, Legal); |
| 787 | setOperationAction(ISD::SELECT_CC, VT, Promote); |
| 788 | AddPromotedToType (ISD::SELECT_CC, VT, MVT::v4i32); |
| 789 | setOperationAction(ISD::STORE, VT, Promote); |
| 790 | AddPromotedToType (ISD::STORE, VT, MVT::v4i32); |
| 791 | |
| 792 | // No other operations are legal. |
| 793 | setOperationAction(ISD::MUL , VT, Expand); |
| 794 | setOperationAction(ISD::SDIV, VT, Expand); |
| 795 | setOperationAction(ISD::SREM, VT, Expand); |
| 796 | setOperationAction(ISD::UDIV, VT, Expand); |
| 797 | setOperationAction(ISD::UREM, VT, Expand); |
| 798 | setOperationAction(ISD::FDIV, VT, Expand); |
| 799 | setOperationAction(ISD::FREM, VT, Expand); |
| 800 | setOperationAction(ISD::FNEG, VT, Expand); |
| 801 | setOperationAction(ISD::FSQRT, VT, Expand); |
| 802 | setOperationAction(ISD::FLOG, VT, Expand); |
| 803 | setOperationAction(ISD::FLOG10, VT, Expand); |
| 804 | setOperationAction(ISD::FLOG2, VT, Expand); |
| 805 | setOperationAction(ISD::FEXP, VT, Expand); |
| 806 | setOperationAction(ISD::FEXP2, VT, Expand); |
| 807 | setOperationAction(ISD::FSIN, VT, Expand); |
| 808 | setOperationAction(ISD::FCOS, VT, Expand); |
| 809 | setOperationAction(ISD::FABS, VT, Expand); |
| 810 | setOperationAction(ISD::FFLOOR, VT, Expand); |
| 811 | setOperationAction(ISD::FCEIL, VT, Expand); |
| 812 | setOperationAction(ISD::FTRUNC, VT, Expand); |
| 813 | setOperationAction(ISD::FRINT, VT, Expand); |
| 814 | setOperationAction(ISD::FNEARBYINT, VT, Expand); |
| 815 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Expand); |
| 816 | setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand); |
| 817 | setOperationAction(ISD::BUILD_VECTOR, VT, Expand); |
| 818 | setOperationAction(ISD::MULHU, VT, Expand); |
| 819 | setOperationAction(ISD::MULHS, VT, Expand); |
| 820 | setOperationAction(ISD::UMUL_LOHI, VT, Expand); |
| 821 | setOperationAction(ISD::SMUL_LOHI, VT, Expand); |
| 822 | setOperationAction(ISD::UDIVREM, VT, Expand); |
| 823 | setOperationAction(ISD::SDIVREM, VT, Expand); |
| 824 | setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Expand); |
| 825 | setOperationAction(ISD::FPOW, VT, Expand); |
| 826 | setOperationAction(ISD::BSWAP, VT, Expand); |
| 827 | setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand); |
| 828 | setOperationAction(ISD::ROTL, VT, Expand); |
| 829 | setOperationAction(ISD::ROTR, VT, Expand); |
| 830 | |
| 831 | for (MVT InnerVT : MVT::fixedlen_vector_valuetypes()) { |
| 832 | setTruncStoreAction(VT, InnerVT, Expand); |
| 833 | setLoadExtAction(ISD::SEXTLOAD, VT, InnerVT, Expand); |
| 834 | setLoadExtAction(ISD::ZEXTLOAD, VT, InnerVT, Expand); |
| 835 | setLoadExtAction(ISD::EXTLOAD, VT, InnerVT, Expand); |
| 836 | } |
| 837 | } |
| 838 | setOperationAction(ISD::SELECT_CC, MVT::v4i32, Expand); |
| 839 | if (!Subtarget.hasP8Vector()) { |
| 840 | setOperationAction(ISD::SMAX, MVT::v2i64, Expand); |
| 841 | setOperationAction(ISD::SMIN, MVT::v2i64, Expand); |
| 842 | setOperationAction(ISD::UMAX, MVT::v2i64, Expand); |
| 843 | setOperationAction(ISD::UMIN, MVT::v2i64, Expand); |
| 844 | } |
| 845 | |
| 846 | // We can custom expand all VECTOR_SHUFFLEs to VPERM, others we can handle |
| 847 | // with merges, splats, etc. |
| 848 | setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v16i8, Custom); |
| 849 | |
| 850 | // Vector truncates to sub-word integer that fit in an Altivec/VSX register |
| 851 | // are cheap, so handle them before they get expanded to scalar. |
| 852 | setOperationAction(ISD::TRUNCATE, MVT::v8i8, Custom); |
| 853 | setOperationAction(ISD::TRUNCATE, MVT::v4i8, Custom); |
| 854 | setOperationAction(ISD::TRUNCATE, MVT::v2i8, Custom); |
| 855 | setOperationAction(ISD::TRUNCATE, MVT::v4i16, Custom); |
| 856 | setOperationAction(ISD::TRUNCATE, MVT::v2i16, Custom); |
| 857 | |
| 858 | setOperationAction(ISD::AND , MVT::v4i32, Legal); |
| 859 | setOperationAction(ISD::OR , MVT::v4i32, Legal); |
| 860 | setOperationAction(ISD::XOR , MVT::v4i32, Legal); |
| 861 | setOperationAction(ISD::LOAD , MVT::v4i32, Legal); |
| 862 | setOperationAction(ISD::SELECT, MVT::v4i32, |
| 863 | Subtarget.useCRBits() ? Legal : Expand); |
| 864 | setOperationAction(ISD::STORE , MVT::v4i32, Legal); |
| 865 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v4i32, Legal); |
| 866 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v4i32, Legal); |
| 867 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i32, Legal); |
| 868 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i32, Legal); |
| 869 | setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal); |
| 870 | setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Legal); |
| 871 | setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal); |
| 872 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Legal); |
| 873 | setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal); |
| 874 | setOperationAction(ISD::FCEIL, MVT::v4f32, Legal); |
| 875 | setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal); |
| 876 | setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal); |
| 877 | |
| 878 | // Custom lowering ROTL v1i128 to VECTOR_SHUFFLE v16i8. |
| 879 | setOperationAction(ISD::ROTL, MVT::v1i128, Custom); |
| 880 | // With hasAltivec set, we can lower ISD::ROTL to vrl(b|h|w). |
| 881 | if (Subtarget.hasAltivec()) |
| 882 | for (auto VT : {MVT::v4i32, MVT::v8i16, MVT::v16i8}) |
| 883 | setOperationAction(ISD::ROTL, VT, Legal); |
| 884 | // With hasP8Altivec set, we can lower ISD::ROTL to vrld. |
| 885 | if (Subtarget.hasP8Altivec()) |
| 886 | setOperationAction(ISD::ROTL, MVT::v2i64, Legal); |
| 887 | |
| 888 | addRegisterClass(MVT::v4f32, &PPC::VRRCRegClass); |
| 889 | addRegisterClass(MVT::v4i32, &PPC::VRRCRegClass); |
| 890 | addRegisterClass(MVT::v8i16, &PPC::VRRCRegClass); |
| 891 | addRegisterClass(MVT::v16i8, &PPC::VRRCRegClass); |
| 892 | |
| 893 | setOperationAction(ISD::MUL, MVT::v4f32, Legal); |
| 894 | setOperationAction(ISD::FMA, MVT::v4f32, Legal); |
| 895 | |
| 896 | if (Subtarget.hasVSX()) { |
| 897 | setOperationAction(ISD::FDIV, MVT::v4f32, Legal); |
| 898 | setOperationAction(ISD::FSQRT, MVT::v4f32, Legal); |
| 899 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2f64, Custom); |
| 900 | } |
| 901 | |
| 902 | if (Subtarget.hasP8Altivec()) |
| 903 | setOperationAction(ISD::MUL, MVT::v4i32, Legal); |
| 904 | else |
| 905 | setOperationAction(ISD::MUL, MVT::v4i32, Custom); |
| 906 | |
| 907 | if (Subtarget.isISA3_1()) { |
| 908 | setOperationAction(ISD::MUL, MVT::v2i64, Legal); |
| 909 | setOperationAction(ISD::MULHS, MVT::v2i64, Legal); |
| 910 | setOperationAction(ISD::MULHU, MVT::v2i64, Legal); |
| 911 | setOperationAction(ISD::MULHS, MVT::v4i32, Legal); |
| 912 | setOperationAction(ISD::MULHU, MVT::v4i32, Legal); |
| 913 | setOperationAction(ISD::UDIV, MVT::v2i64, Legal); |
| 914 | setOperationAction(ISD::SDIV, MVT::v2i64, Legal); |
| 915 | setOperationAction(ISD::UDIV, MVT::v4i32, Legal); |
| 916 | setOperationAction(ISD::SDIV, MVT::v4i32, Legal); |
| 917 | setOperationAction(ISD::UREM, MVT::v2i64, Legal); |
| 918 | setOperationAction(ISD::SREM, MVT::v2i64, Legal); |
| 919 | setOperationAction(ISD::UREM, MVT::v4i32, Legal); |
| 920 | setOperationAction(ISD::SREM, MVT::v4i32, Legal); |
| 921 | setOperationAction(ISD::UREM, MVT::v1i128, Legal); |
| 922 | setOperationAction(ISD::SREM, MVT::v1i128, Legal); |
| 923 | setOperationAction(ISD::UDIV, MVT::v1i128, Legal); |
| 924 | setOperationAction(ISD::SDIV, MVT::v1i128, Legal); |
| 925 | setOperationAction(ISD::ROTL, MVT::v1i128, Legal); |
| 926 | } |
| 927 | |
| 928 | setOperationAction(ISD::MUL, MVT::v8i16, Legal); |
| 929 | setOperationAction(ISD::MUL, MVT::v16i8, Custom); |
| 930 | |
| 931 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Custom); |
| 932 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i32, Custom); |
| 933 | |
| 934 | setOperationAction(ISD::BUILD_VECTOR, MVT::v16i8, Custom); |
| 935 | setOperationAction(ISD::BUILD_VECTOR, MVT::v8i16, Custom); |
| 936 | setOperationAction(ISD::BUILD_VECTOR, MVT::v4i32, Custom); |
| 937 | setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom); |
| 938 | |
| 939 | // Altivec does not contain unordered floating-point compare instructions |
| 940 | setCondCodeAction(ISD::SETUO, MVT::v4f32, Expand); |
| 941 | setCondCodeAction(ISD::SETUEQ, MVT::v4f32, Expand); |
| 942 | setCondCodeAction(ISD::SETO, MVT::v4f32, Expand); |
| 943 | setCondCodeAction(ISD::SETONE, MVT::v4f32, Expand); |
| 944 | |
| 945 | if (Subtarget.hasVSX()) { |
| 946 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2f64, Legal); |
| 947 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Legal); |
| 948 | if (Subtarget.hasP8Vector()) { |
| 949 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Legal); |
| 950 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Legal); |
| 951 | } |
| 952 | if (Subtarget.hasDirectMove() && isPPC64) { |
| 953 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Legal); |
| 954 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Legal); |
| 955 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i32, Legal); |
| 956 | setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i64, Legal); |
| 957 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Legal); |
| 958 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Legal); |
| 959 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Legal); |
| 960 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Legal); |
| 961 | } |
| 962 | setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Legal); |
| 963 | |
| 964 | // The nearbyint variants are not allowed to raise the inexact exception |
| 965 | // so we can only code-gen them with unsafe math. |
| 966 | if (TM.Options.UnsafeFPMath) { |
| 967 | setOperationAction(ISD::FNEARBYINT, MVT::f64, Legal); |
| 968 | setOperationAction(ISD::FNEARBYINT, MVT::f32, Legal); |
| 969 | } |
| 970 | |
| 971 | setOperationAction(ISD::FFLOOR, MVT::v2f64, Legal); |
| 972 | setOperationAction(ISD::FCEIL, MVT::v2f64, Legal); |
| 973 | setOperationAction(ISD::FTRUNC, MVT::v2f64, Legal); |
| 974 | setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Legal); |
| 975 | setOperationAction(ISD::FRINT, MVT::v2f64, Legal); |
| 976 | setOperationAction(ISD::FROUND, MVT::v2f64, Legal); |
| 977 | setOperationAction(ISD::FROUND, MVT::f64, Legal); |
| 978 | setOperationAction(ISD::FRINT, MVT::f64, Legal); |
| 979 | |
| 980 | setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal); |
| 981 | setOperationAction(ISD::FRINT, MVT::v4f32, Legal); |
| 982 | setOperationAction(ISD::FROUND, MVT::v4f32, Legal); |
| 983 | setOperationAction(ISD::FROUND, MVT::f32, Legal); |
| 984 | setOperationAction(ISD::FRINT, MVT::f32, Legal); |
| 985 | |
| 986 | setOperationAction(ISD::MUL, MVT::v2f64, Legal); |
| 987 | setOperationAction(ISD::FMA, MVT::v2f64, Legal); |
| 988 | |
| 989 | setOperationAction(ISD::FDIV, MVT::v2f64, Legal); |
| 990 | setOperationAction(ISD::FSQRT, MVT::v2f64, Legal); |
| 991 | |
| 992 | // Share the Altivec comparison restrictions. |
| 993 | setCondCodeAction(ISD::SETUO, MVT::v2f64, Expand); |
| 994 | setCondCodeAction(ISD::SETUEQ, MVT::v2f64, Expand); |
| 995 | setCondCodeAction(ISD::SETO, MVT::v2f64, Expand); |
| 996 | setCondCodeAction(ISD::SETONE, MVT::v2f64, Expand); |
| 997 | |
| 998 | setOperationAction(ISD::LOAD, MVT::v2f64, Legal); |
| 999 | setOperationAction(ISD::STORE, MVT::v2f64, Legal); |
| 1000 | |
| 1001 | setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Legal); |
| 1002 | |
| 1003 | if (Subtarget.hasP8Vector()) |
| 1004 | addRegisterClass(MVT::f32, &PPC::VSSRCRegClass); |
| 1005 | |
| 1006 | addRegisterClass(MVT::f64, &PPC::VSFRCRegClass); |
| 1007 | |
| 1008 | addRegisterClass(MVT::v4i32, &PPC::VSRCRegClass); |
| 1009 | addRegisterClass(MVT::v4f32, &PPC::VSRCRegClass); |
| 1010 | addRegisterClass(MVT::v2f64, &PPC::VSRCRegClass); |
| 1011 | |
| 1012 | if (Subtarget.hasP8Altivec()) { |
| 1013 | setOperationAction(ISD::SHL, MVT::v2i64, Legal); |
| 1014 | setOperationAction(ISD::SRA, MVT::v2i64, Legal); |
| 1015 | setOperationAction(ISD::SRL, MVT::v2i64, Legal); |
| 1016 | |
| 1017 | // 128 bit shifts can be accomplished via 3 instructions for SHL and |
| 1018 | // SRL, but not for SRA because of the instructions available: |
| 1019 | // VS{RL} and VS{RL}O. However due to direct move costs, it's not worth |
| 1020 | // doing |
| 1021 | setOperationAction(ISD::SHL, MVT::v1i128, Expand); |
| 1022 | setOperationAction(ISD::SRL, MVT::v1i128, Expand); |
| 1023 | setOperationAction(ISD::SRA, MVT::v1i128, Expand); |
| 1024 | |
| 1025 | setOperationAction(ISD::SETCC, MVT::v2i64, Legal); |
| 1026 | } |
| 1027 | else { |
| 1028 | setOperationAction(ISD::SHL, MVT::v2i64, Expand); |
| 1029 | setOperationAction(ISD::SRA, MVT::v2i64, Expand); |
| 1030 | setOperationAction(ISD::SRL, MVT::v2i64, Expand); |
| 1031 | |
| 1032 | setOperationAction(ISD::SETCC, MVT::v2i64, Custom); |
| 1033 | |
| 1034 | // VSX v2i64 only supports non-arithmetic operations. |
| 1035 | setOperationAction(ISD::ADD, MVT::v2i64, Expand); |
| 1036 | setOperationAction(ISD::SUB, MVT::v2i64, Expand); |
| 1037 | } |
| 1038 | |
| 1039 | if (Subtarget.isISA3_1()) |
| 1040 | setOperationAction(ISD::SETCC, MVT::v1i128, Legal); |
| 1041 | else |
| 1042 | setOperationAction(ISD::SETCC, MVT::v1i128, Expand); |
| 1043 | |
| 1044 | setOperationAction(ISD::LOAD, MVT::v2i64, Promote); |
| 1045 | AddPromotedToType (ISD::LOAD, MVT::v2i64, MVT::v2f64); |
| 1046 | setOperationAction(ISD::STORE, MVT::v2i64, Promote); |
| 1047 | AddPromotedToType (ISD::STORE, MVT::v2i64, MVT::v2f64); |
| 1048 | |
| 1049 | setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Legal); |
| 1050 | |
| 1051 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2i64, Legal); |
| 1052 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2i64, Legal); |
| 1053 | setOperationAction(ISD::STRICT_FP_TO_SINT, MVT::v2i64, Legal); |
| 1054 | setOperationAction(ISD::STRICT_FP_TO_UINT, MVT::v2i64, Legal); |
| 1055 | setOperationAction(ISD::SINT_TO_FP, MVT::v2i64, Legal); |
| 1056 | setOperationAction(ISD::UINT_TO_FP, MVT::v2i64, Legal); |
| 1057 | setOperationAction(ISD::FP_TO_SINT, MVT::v2i64, Legal); |
| 1058 | setOperationAction(ISD::FP_TO_UINT, MVT::v2i64, Legal); |
| 1059 | |
| 1060 | // Custom handling for partial vectors of integers converted to |
| 1061 | // floating point. We already have optimal handling for v2i32 through |
| 1062 | // the DAG combine, so those aren't necessary. |
| 1063 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2i8, Custom); |
| 1064 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i8, Custom); |
| 1065 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v2i16, Custom); |
| 1066 | setOperationAction(ISD::STRICT_UINT_TO_FP, MVT::v4i16, Custom); |
| 1067 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2i8, Custom); |
| 1068 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i8, Custom); |
| 1069 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v2i16, Custom); |
| 1070 | setOperationAction(ISD::STRICT_SINT_TO_FP, MVT::v4i16, Custom); |
| 1071 | setOperationAction(ISD::UINT_TO_FP, MVT::v2i8, Custom); |
| 1072 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i8, Custom); |
| 1073 | setOperationAction(ISD::UINT_TO_FP, MVT::v2i16, Custom); |
| 1074 | setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom); |
| 1075 | setOperationAction(ISD::SINT_TO_FP, MVT::v2i8, Custom); |
| 1076 | setOperationAction(ISD::SINT_TO_FP, MVT::v4i8, Custom); |
| 1077 | setOperationAction(ISD::SINT_TO_FP, MVT::v2i16, Custom); |
| 1078 | setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom); |
| 1079 | |
| 1080 | setOperationAction(ISD::FNEG, MVT::v4f32, Legal); |
| 1081 | setOperationAction(ISD::FNEG, MVT::v2f64, Legal); |
| 1082 | setOperationAction(ISD::FABS, MVT::v4f32, Legal); |
| 1083 | setOperationAction(ISD::FABS, MVT::v2f64, Legal); |
| 1084 | setOperationAction(ISD::FCOPYSIGN, MVT::v4f32, Legal); |
| 1085 | setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Legal); |
| 1086 | |
| 1087 | setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom); |
| 1088 | setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom); |
| 1089 | |
| 1090 | // Handle constrained floating-point operations of vector. |
| 1091 | // The predictor is `hasVSX` because altivec instruction has |
| 1092 | // no exception but VSX vector instruction has. |
| 1093 | setOperationAction(ISD::STRICT_FADD, MVT::v4f32, Legal); |
| 1094 | setOperationAction(ISD::STRICT_FSUB, MVT::v4f32, Legal); |
| 1095 | setOperationAction(ISD::STRICT_FMUL, MVT::v4f32, Legal); |
| 1096 | setOperationAction(ISD::STRICT_FDIV, MVT::v4f32, Legal); |
| 1097 | setOperationAction(ISD::STRICT_FMA, MVT::v4f32, Legal); |
| 1098 | setOperationAction(ISD::STRICT_FSQRT, MVT::v4f32, Legal); |
| 1099 | setOperationAction(ISD::STRICT_FMAXNUM, MVT::v4f32, Legal); |
| 1100 | setOperationAction(ISD::STRICT_FMINNUM, MVT::v4f32, Legal); |
| 1101 | setOperationAction(ISD::STRICT_FRINT, MVT::v4f32, Legal); |
| 1102 | setOperationAction(ISD::STRICT_FFLOOR, MVT::v4f32, Legal); |
| 1103 | setOperationAction(ISD::STRICT_FCEIL, MVT::v4f32, Legal); |
| 1104 | setOperationAction(ISD::STRICT_FTRUNC, MVT::v4f32, Legal); |
| 1105 | setOperationAction(ISD::STRICT_FROUND, MVT::v4f32, Legal); |
| 1106 | |
| 1107 | setOperationAction(ISD::STRICT_FADD, MVT::v2f64, Legal); |
| 1108 | setOperationAction(ISD::STRICT_FSUB, MVT::v2f64, Legal); |
| 1109 | setOperationAction(ISD::STRICT_FMUL, MVT::v2f64, Legal); |
| 1110 | setOperationAction(ISD::STRICT_FDIV, MVT::v2f64, Legal); |
| 1111 | setOperationAction(ISD::STRICT_FMA, MVT::v2f64, Legal); |
| 1112 | setOperationAction(ISD::STRICT_FSQRT, MVT::v2f64, Legal); |
| 1113 | setOperationAction(ISD::STRICT_FMAXNUM, MVT::v2f64, Legal); |
| 1114 | setOperationAction(ISD::STRICT_FMINNUM, MVT::v2f64, Legal); |
| 1115 | setOperationAction(ISD::STRICT_FRINT, MVT::v2f64, Legal); |
| 1116 | setOperationAction(ISD::STRICT_FFLOOR, MVT::v2f64, Legal); |
| 1117 | setOperationAction(ISD::STRICT_FCEIL, MVT::v2f64, Legal); |
| 1118 | setOperationAction(ISD::STRICT_FTRUNC, MVT::v2f64, Legal); |
| 1119 | setOperationAction(ISD::STRICT_FROUND, MVT::v2f64, Legal); |
| 1120 | |
| 1121 | addRegisterClass(MVT::v2i64, &PPC::VSRCRegClass); |
| 1122 | addRegisterClass(MVT::f128, &PPC::VRRCRegClass); |
| 1123 | |
| 1124 | for (MVT FPT : MVT::fp_valuetypes()) |
| 1125 | setLoadExtAction(ISD::EXTLOAD, MVT::f128, FPT, Expand); |
| 1126 | |
| 1127 | // Expand the SELECT to SELECT_CC |
| 1128 | setOperationAction(ISD::SELECT, MVT::f128, Expand); |
| 1129 | |
| 1130 | setTruncStoreAction(MVT::f128, MVT::f64, Expand); |
| 1131 | setTruncStoreAction(MVT::f128, MVT::f32, Expand); |
| 1132 | |
| 1133 | // No implementation for these ops for PowerPC. |
| 1134 | setOperationAction(ISD::FSIN, MVT::f128, Expand); |
| 1135 | setOperationAction(ISD::FCOS, MVT::f128, Expand); |
| 1136 | setOperationAction(ISD::FPOW, MVT::f128, Expand); |
| 1137 | setOperationAction(ISD::FPOWI, MVT::f128, Expand); |
| 1138 | setOperationAction(ISD::FREM, MVT::f128, Expand); |
| 1139 | } |
| 1140 | |
| 1141 | if (Subtarget.hasP8Altivec()) { |
| 1142 | addRegisterClass(MVT::v2i64, &PPC::VRRCRegClass); |
| 1143 | addRegisterClass(MVT::v1i128, &PPC::VRRCRegClass); |
| 1144 | } |
| 1145 | |
| 1146 | if (Subtarget.hasP9Vector()) { |
| 1147 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom); |
| 1148 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom); |
| 1149 | |
| 1150 | // 128 bit shifts can be accomplished via 3 instructions for SHL and |
| 1151 | // SRL, but not for SRA because of the instructions available: |
| 1152 | // VS{RL} and VS{RL}O. |
| 1153 | setOperationAction(ISD::SHL, MVT::v1i128, Legal); |
| 1154 | setOperationAction(ISD::SRL, MVT::v1i128, Legal); |
| 1155 | setOperationAction(ISD::SRA, MVT::v1i128, Expand); |
| 1156 | |
| 1157 | setOperationAction(ISD::FADD, MVT::f128, Legal); |
| 1158 | setOperationAction(ISD::FSUB, MVT::f128, Legal); |
| 1159 | setOperationAction(ISD::FDIV, MVT::f128, Legal); |
| 1160 | setOperationAction(ISD::FMUL, MVT::f128, Legal); |
| 1161 | setOperationAction(ISD::FP_EXTEND, MVT::f128, Legal); |
| 1162 | |
| 1163 | setOperationAction(ISD::FMA, MVT::f128, Legal); |
| 1164 | setCondCodeAction(ISD::SETULT, MVT::f128, Expand); |
| 1165 | setCondCodeAction(ISD::SETUGT, MVT::f128, Expand); |
| 1166 | setCondCodeAction(ISD::SETUEQ, MVT::f128, Expand); |
| 1167 | setCondCodeAction(ISD::SETOGE, MVT::f128, Expand); |
| 1168 | setCondCodeAction(ISD::SETOLE, MVT::f128, Expand); |
| 1169 | setCondCodeAction(ISD::SETONE, MVT::f128, Expand); |
| 1170 | |
| 1171 | setOperationAction(ISD::FTRUNC, MVT::f128, Legal); |
| 1172 | setOperationAction(ISD::FRINT, MVT::f128, Legal); |
| 1173 | setOperationAction(ISD::FFLOOR, MVT::f128, Legal); |
| 1174 | setOperationAction(ISD::FCEIL, MVT::f128, Legal); |
| 1175 | setOperationAction(ISD::FNEARBYINT, MVT::f128, Legal); |
| 1176 | setOperationAction(ISD::FROUND, MVT::f128, Legal); |
| 1177 | |
| 1178 | setOperationAction(ISD::FP_ROUND, MVT::f64, Legal); |
| 1179 | setOperationAction(ISD::FP_ROUND, MVT::f32, Legal); |
| 1180 | setOperationAction(ISD::BITCAST, MVT::i128, Custom); |
| 1181 | |
| 1182 | // Handle constrained floating-point operations of fp128 |
| 1183 | setOperationAction(ISD::STRICT_FADD, MVT::f128, Legal); |
| 1184 | setOperationAction(ISD::STRICT_FSUB, MVT::f128, Legal); |
| 1185 | setOperationAction(ISD::STRICT_FMUL, MVT::f128, Legal); |
| 1186 | setOperationAction(ISD::STRICT_FDIV, MVT::f128, Legal); |
| 1187 | setOperationAction(ISD::STRICT_FMA, MVT::f128, Legal); |
| 1188 | setOperationAction(ISD::STRICT_FSQRT, MVT::f128, Legal); |
| 1189 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f128, Legal); |
| 1190 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f64, Legal); |
| 1191 | setOperationAction(ISD::STRICT_FP_ROUND, MVT::f32, Legal); |
| 1192 | setOperationAction(ISD::STRICT_FRINT, MVT::f128, Legal); |
| 1193 | setOperationAction(ISD::STRICT_FNEARBYINT, MVT::f128, Legal); |
| 1194 | setOperationAction(ISD::STRICT_FFLOOR, MVT::f128, Legal); |
| 1195 | setOperationAction(ISD::STRICT_FCEIL, MVT::f128, Legal); |
| 1196 | setOperationAction(ISD::STRICT_FTRUNC, MVT::f128, Legal); |
| 1197 | setOperationAction(ISD::STRICT_FROUND, MVT::f128, Legal); |
| 1198 | setOperationAction(ISD::FP_EXTEND, MVT::v2f32, Custom); |
| 1199 | setOperationAction(ISD::BSWAP, MVT::v8i16, Legal); |
| 1200 | setOperationAction(ISD::BSWAP, MVT::v4i32, Legal); |
| 1201 | setOperationAction(ISD::BSWAP, MVT::v2i64, Legal); |
| 1202 | setOperationAction(ISD::BSWAP, MVT::v1i128, Legal); |
| 1203 | } else if (Subtarget.hasVSX()) { |
| 1204 | setOperationAction(ISD::LOAD, MVT::f128, Promote); |
| 1205 | setOperationAction(ISD::STORE, MVT::f128, Promote); |
| 1206 | |
| 1207 | AddPromotedToType(ISD::LOAD, MVT::f128, MVT::v4i32); |
| 1208 | AddPromotedToType(ISD::STORE, MVT::f128, MVT::v4i32); |
| 1209 | |
| 1210 | // Set FADD/FSUB as libcall to avoid the legalizer to expand the |
| 1211 | // fp_to_uint and int_to_fp. |
| 1212 | setOperationAction(ISD::FADD, MVT::f128, LibCall); |
| 1213 | setOperationAction(ISD::FSUB, MVT::f128, LibCall); |
| 1214 | |
| 1215 | setOperationAction(ISD::FMUL, MVT::f128, Expand); |
| 1216 | setOperationAction(ISD::FDIV, MVT::f128, Expand); |
| 1217 | setOperationAction(ISD::FNEG, MVT::f128, Expand); |
| 1218 | setOperationAction(ISD::FABS, MVT::f128, Expand); |
| 1219 | setOperationAction(ISD::FSQRT, MVT::f128, Expand); |
| 1220 | setOperationAction(ISD::FMA, MVT::f128, Expand); |
| 1221 | setOperationAction(ISD::FCOPYSIGN, MVT::f128, Expand); |
| 1222 | |
| 1223 | // Expand the fp_extend if the target type is fp128. |
| 1224 | setOperationAction(ISD::FP_EXTEND, MVT::f128, Expand); |
| 1225 | setOperationAction(ISD::STRICT_FP_EXTEND, MVT::f128, Expand); |
| 1226 | |
| 1227 | // Expand the fp_round if the source type is fp128. |
| 1228 | for (MVT VT : {MVT::f32, MVT::f64}) { |
| 1229 | setOperationAction(ISD::FP_ROUND, VT, Custom); |
| 1230 | setOperationAction(ISD::STRICT_FP_ROUND, VT, Custom); |
| 1231 | } |
| 1232 | |
| 1233 | setOperationAction(ISD::SETCC, MVT::f128, Custom); |
| 1234 | setOperationAction(ISD::STRICT_FSETCC, MVT::f128, Custom); |
| 1235 | setOperationAction(ISD::STRICT_FSETCCS, MVT::f128, Custom); |
| 1236 | setOperationAction(ISD::BR_CC, MVT::f128, Expand); |
| 1237 | |
| 1238 | // Lower following f128 select_cc pattern: |
| 1239 | // select_cc x, y, tv, fv, cc -> select_cc (setcc x, y, cc), 0, tv, fv, NE |
| 1240 | setOperationAction(ISD::SELECT_CC, MVT::f128, Custom); |
| 1241 | |
| 1242 | // We need to handle f128 SELECT_CC with integer result type. |
| 1243 | setOperationAction(ISD::SELECT_CC, MVT::i32, Custom); |
| 1244 | setOperationAction(ISD::SELECT_CC, MVT::i64, isPPC64 ? Custom : Expand); |
| 1245 | } |
| 1246 | |
| 1247 | if (Subtarget.hasP9Altivec()) { |
| 1248 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom); |
| 1249 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom); |
| 1250 | |
| 1251 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i8, Legal); |
| 1252 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i16, Legal); |
| 1253 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v4i32, Legal); |
| 1254 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i8, Legal); |
| 1255 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i16, Legal); |
| 1256 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i32, Legal); |
| 1257 | setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i64, Legal); |
| 1258 | } |
| 1259 | |
| 1260 | if (Subtarget.isISA3_1()) |
| 1261 | setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v2i64, Custom); |
| 1262 | } |
| 1263 | |
| 1264 | if (Subtarget.pairedVectorMemops()) { |
| 1265 | addRegisterClass(MVT::v256i1, &PPC::VSRpRCRegClass); |
| 1266 | setOperationAction(ISD::LOAD, MVT::v256i1, Custom); |
| 1267 | setOperationAction(ISD::STORE, MVT::v256i1, Custom); |
| 1268 | } |
| 1269 | if (Subtarget.hasMMA()) { |
| 1270 | addRegisterClass(MVT::v512i1, &PPC::UACCRCRegClass); |
| 1271 | setOperationAction(ISD::LOAD, MVT::v512i1, Custom); |
| 1272 | setOperationAction(ISD::STORE, MVT::v512i1, Custom); |
| 1273 | setOperationAction(ISD::BUILD_VECTOR, MVT::v512i1, Custom); |
| 1274 | } |
| 1275 | |
| 1276 | if (Subtarget.has64BitSupport()) |
| 1277 | setOperationAction(ISD::PREFETCH, MVT::Other, Legal); |
| 1278 | |
| 1279 | if (Subtarget.isISA3_1()) |
| 1280 | setOperationAction(ISD::SRA, MVT::v1i128, Legal); |
| 1281 | |
| 1282 | setOperationAction(ISD::READCYCLECOUNTER, MVT::i64, isPPC64 ? Legal : Custom); |
| 1283 | |
| 1284 | if (!isPPC64) { |
| 1285 | setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Expand); |
| 1286 | setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand); |
| 1287 | } |
| 1288 | |
| 1289 | if (EnableQuadwordAtomics && Subtarget.hasQuadwordAtomics()) |
| 1290 | setMaxAtomicSizeInBitsSupported(128); |
| 1291 | |
| 1292 | setBooleanContents(ZeroOrOneBooleanContent); |
| 1293 | |
| 1294 | if (Subtarget.hasAltivec()) { |
| 1295 | // Altivec instructions set fields to all zeros or all ones. |
| 1296 | setBooleanVectorContents(ZeroOrNegativeOneBooleanContent); |
| 1297 | } |
| 1298 | |
| 1299 | if (!isPPC64) { |
| 1300 | // These libcalls are not available in 32-bit. |
| 1301 | setLibcallName(RTLIB::SHL_I128, nullptr); |
| 1302 | setLibcallName(RTLIB::SRL_I128, nullptr); |
| 1303 | setLibcallName(RTLIB::SRA_I128, nullptr); |
| 1304 | } |
| 1305 | |
| 1306 | if (!isPPC64) |
| 1307 | setMaxAtomicSizeInBitsSupported(32); |
| 1308 | |
| 1309 | setStackPointerRegisterToSaveRestore(isPPC64 ? PPC::X1 : PPC::R1); |
| 1310 | |
| 1311 | // We have target-specific dag combine patterns for the following nodes: |
| 1312 | setTargetDAGCombine(ISD::ADD); |
| 1313 | setTargetDAGCombine(ISD::SHL); |
| 1314 | setTargetDAGCombine(ISD::SRA); |
| 1315 | setTargetDAGCombine(ISD::SRL); |
| 1316 | setTargetDAGCombine(ISD::MUL); |
| 1317 | setTargetDAGCombine(ISD::FMA); |
| 1318 | setTargetDAGCombine(ISD::SINT_TO_FP); |
| 1319 | setTargetDAGCombine(ISD::BUILD_VECTOR); |
| 1320 | if (Subtarget.hasFPCVT()) |
| 1321 | setTargetDAGCombine(ISD::UINT_TO_FP); |
| 1322 | setTargetDAGCombine(ISD::LOAD); |
| 1323 | setTargetDAGCombine(ISD::STORE); |
| 1324 | setTargetDAGCombine(ISD::BR_CC); |
| 1325 | if (Subtarget.useCRBits()) |
| 1326 | setTargetDAGCombine(ISD::BRCOND); |
| 1327 | setTargetDAGCombine(ISD::BSWAP); |
| 1328 | setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN); |
| 1329 | setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN); |
| 1330 | setTargetDAGCombine(ISD::INTRINSIC_VOID); |
| 1331 | |
| 1332 | setTargetDAGCombine(ISD::SIGN_EXTEND); |
| 1333 | setTargetDAGCombine(ISD::ZERO_EXTEND); |
| 1334 | setTargetDAGCombine(ISD::ANY_EXTEND); |
| 1335 | |
| 1336 | setTargetDAGCombine(ISD::TRUNCATE); |
| 1337 | setTargetDAGCombine(ISD::VECTOR_SHUFFLE); |
| 1338 | |
| 1339 | |
| 1340 | if (Subtarget.useCRBits()) { |
| 1341 | setTargetDAGCombine(ISD::TRUNCATE); |
| 1342 | setTargetDAGCombine(ISD::SETCC); |
| 1343 | setTargetDAGCombine(ISD::SELECT_CC); |
| 1344 | } |
| 1345 | |
| 1346 | if (Subtarget.hasP9Altivec()) { |
| 1347 | setTargetDAGCombine(ISD::ABS); |
| 1348 | setTargetDAGCombine(ISD::VSELECT); |
| 1349 | } |
| 1350 | |
| 1351 | setLibcallName(RTLIB::LOG_F128, "logf128"); |
| 1352 | setLibcallName(RTLIB::LOG2_F128, "log2f128"); |
| 1353 | setLibcallName(RTLIB::LOG10_F128, "log10f128"); |
| 1354 | setLibcallName(RTLIB::EXP_F128, "expf128"); |
| 1355 | setLibcallName(RTLIB::EXP2_F128, "exp2f128"); |
| 1356 | setLibcallName(RTLIB::SIN_F128, "sinf128"); |
| 1357 | setLibcallName(RTLIB::COS_F128, "cosf128"); |
| 1358 | setLibcallName(RTLIB::POW_F128, "powf128"); |
| 1359 | setLibcallName(RTLIB::FMIN_F128, "fminf128"); |
| 1360 | setLibcallName(RTLIB::FMAX_F128, "fmaxf128"); |
| 1361 | setLibcallName(RTLIB::REM_F128, "fmodf128"); |
| 1362 | setLibcallName(RTLIB::SQRT_F128, "sqrtf128"); |
| 1363 | setLibcallName(RTLIB::CEIL_F128, "ceilf128"); |
| 1364 | setLibcallName(RTLIB::FLOOR_F128, "floorf128"); |
| 1365 | setLibcallName(RTLIB::TRUNC_F128, "truncf128"); |
| 1366 | setLibcallName(RTLIB::ROUND_F128, "roundf128"); |
| 1367 | setLibcallName(RTLIB::LROUND_F128, "lroundf128"); |
| 1368 | setLibcallName(RTLIB::LLROUND_F128, "llroundf128"); |
| 1369 | setLibcallName(RTLIB::RINT_F128, "rintf128"); |
| 1370 | setLibcallName(RTLIB::LRINT_F128, "lrintf128"); |
| 1371 | setLibcallName(RTLIB::LLRINT_F128, "llrintf128"); |
| 1372 | setLibcallName(RTLIB::NEARBYINT_F128, "nearbyintf128"); |
| 1373 | setLibcallName(RTLIB::FMA_F128, "fmaf128"); |
| 1374 | |
| 1375 | // With 32 condition bits, we don't need to sink (and duplicate) compares |
| 1376 | // aggressively in CodeGenPrep. |
| 1377 | if (Subtarget.useCRBits()) { |
| 1378 | setHasMultipleConditionRegisters(); |
| 1379 | setJumpIsExpensive(); |
| 1380 | } |
| 1381 | |
| 1382 | setMinFunctionAlignment(Align(4)); |
| 1383 | |
| 1384 | switch (Subtarget.getCPUDirective()) { |
| 1385 | default: break; |
| 1386 | case PPC::DIR_970: |
| 1387 | case PPC::DIR_A2: |
| 1388 | case PPC::DIR_E500: |
| 1389 | case PPC::DIR_E500mc: |
| 1390 | case PPC::DIR_E5500: |
| 1391 | case PPC::DIR_PWR4: |
| 1392 | case PPC::DIR_PWR5: |
| 1393 | case PPC::DIR_PWR5X: |
| 1394 | case PPC::DIR_PWR6: |
| 1395 | case PPC::DIR_PWR6X: |
| 1396 | case PPC::DIR_PWR7: |
| 1397 | case PPC::DIR_PWR8: |
| 1398 | case PPC::DIR_PWR9: |
| 1399 | case PPC::DIR_PWR10: |
| 1400 | case PPC::DIR_PWR_FUTURE: |
| 1401 | setPrefLoopAlignment(Align(16)); |
| 1402 | setPrefFunctionAlignment(Align(16)); |
| 1403 | break; |
| 1404 | } |
| 1405 | |
| 1406 | if (Subtarget.enableMachineScheduler()) |
| 1407 | setSchedulingPreference(Sched::Source); |
| 1408 | else |
| 1409 | setSchedulingPreference(Sched::Hybrid); |
| 1410 | |
| 1411 | computeRegisterProperties(STI.getRegisterInfo()); |
| 1412 | |
| 1413 | // The Freescale cores do better with aggressive inlining of memcpy and |
| 1414 | // friends. GCC uses same threshold of 128 bytes (= 32 word stores). |
| 1415 | if (Subtarget.getCPUDirective() == PPC::DIR_E500mc || |
| 1416 | Subtarget.getCPUDirective() == PPC::DIR_E5500) { |
| 1417 | MaxStoresPerMemset = 32; |
| 1418 | MaxStoresPerMemsetOptSize = 16; |
| 1419 | MaxStoresPerMemcpy = 32; |
| 1420 | MaxStoresPerMemcpyOptSize = 8; |
| 1421 | MaxStoresPerMemmove = 32; |
| 1422 | MaxStoresPerMemmoveOptSize = 8; |
| 1423 | } else if (Subtarget.getCPUDirective() == PPC::DIR_A2) { |
| 1424 | // The A2 also benefits from (very) aggressive inlining of memcpy and |
| 1425 | // friends. The overhead of a the function call, even when warm, can be |
| 1426 | // over one hundred cycles. |
| 1427 | MaxStoresPerMemset = 128; |
| 1428 | MaxStoresPerMemcpy = 128; |
| 1429 | MaxStoresPerMemmove = 128; |
| 1430 | MaxLoadsPerMemcmp = 128; |
| 1431 | } else { |
| 1432 | MaxLoadsPerMemcmp = 8; |
| 1433 | MaxLoadsPerMemcmpOptSize = 4; |
| 1434 | } |
| 1435 | |
| 1436 | IsStrictFPEnabled = true; |
| 1437 | |
| 1438 | // Let the subtarget (CPU) decide if a predictable select is more expensive |
| 1439 | // than the corresponding branch. This information is used in CGP to decide |
| 1440 | // when to convert selects into branches. |
| 1441 | PredictableSelectIsExpensive = Subtarget.isPredictableSelectIsExpensive(); |
| 1442 | } |
| 1443 | |
| 1444 | // *********************************** NOTE ************************************ |
| 1445 | // For selecting load and store instructions, the addressing modes are defined |
| 1446 | // as ComplexPatterns in PPCInstrInfo.td, which are then utilized in the TD |
| 1447 | // patterns to match the load the store instructions. |
| 1448 | // |
| 1449 | // The TD definitions for the addressing modes correspond to their respective |
| 1450 | // Select<AddrMode>Form() function in PPCISelDAGToDAG.cpp. These functions rely |
| 1451 | // on SelectOptimalAddrMode(), which calls computeMOFlags() to compute the |
| 1452 | // address mode flags of a particular node. Afterwards, the computed address |
| 1453 | // flags are passed into getAddrModeForFlags() in order to retrieve the optimal |
| 1454 | // addressing mode. SelectOptimalAddrMode() then sets the Base and Displacement |
| 1455 | // accordingly, based on the preferred addressing mode. |
| 1456 | // |
| 1457 | // Within PPCISelLowering.h, there are two enums: MemOpFlags and AddrMode. |
| 1458 | // MemOpFlags contains all the possible flags that can be used to compute the |
| 1459 | // optimal addressing mode for load and store instructions. |
| 1460 | // AddrMode contains all the possible load and store addressing modes available |
| 1461 | // on Power (such as DForm, DSForm, DQForm, XForm, etc.) |
| 1462 | // |
| 1463 | // When adding new load and store instructions, it is possible that new address |
| 1464 | // flags may need to be added into MemOpFlags, and a new addressing mode will |
| 1465 | // need to be added to AddrMode. An entry of the new addressing mode (consisting |
| 1466 | // of the minimal and main distinguishing address flags for the new load/store |
| 1467 | // instructions) will need to be added into initializeAddrModeMap() below. |
| 1468 | // Finally, when adding new addressing modes, the getAddrModeForFlags() will |
| 1469 | // need to be updated to account for selecting the optimal addressing mode. |
| 1470 | // ***************************************************************************** |
| 1471 | /// Initialize the map that relates the different addressing modes of the load |
| 1472 | /// and store instructions to a set of flags. This ensures the load/store |
| 1473 | /// instruction is correctly matched during instruction selection. |
| 1474 | void PPCTargetLowering::initializeAddrModeMap() { |
| 1475 | AddrModesMap[PPC::AM_DForm] = { |
| 1476 | // LWZ, STW |
| 1477 | PPC::MOF_ZExt | PPC::MOF_RPlusSImm16 | PPC::MOF_WordInt, |
| 1478 | PPC::MOF_ZExt | PPC::MOF_RPlusLo | PPC::MOF_WordInt, |
| 1479 | PPC::MOF_ZExt | PPC::MOF_NotAddNorCst | PPC::MOF_WordInt, |
| 1480 | PPC::MOF_ZExt | PPC::MOF_AddrIsSImm32 | PPC::MOF_WordInt, |
| 1481 | // LBZ, LHZ, STB, STH |
| 1482 | PPC::MOF_ZExt | PPC::MOF_RPlusSImm16 | PPC::MOF_SubWordInt, |
| 1483 | PPC::MOF_ZExt | PPC::MOF_RPlusLo | PPC::MOF_SubWordInt, |
| 1484 | PPC::MOF_ZExt | PPC::MOF_NotAddNorCst | PPC::MOF_SubWordInt, |
| 1485 | PPC::MOF_ZExt | PPC::MOF_AddrIsSImm32 | PPC::MOF_SubWordInt, |
| 1486 | // LHA |
| 1487 | PPC::MOF_SExt | PPC::MOF_RPlusSImm16 | PPC::MOF_SubWordInt, |
| 1488 | PPC::MOF_SExt | PPC::MOF_RPlusLo | PPC::MOF_SubWordInt, |
| 1489 | PPC::MOF_SExt | PPC::MOF_NotAddNorCst | PPC::MOF_SubWordInt, |
| 1490 | PPC::MOF_SExt | PPC::MOF_AddrIsSImm32 | PPC::MOF_SubWordInt, |
| 1491 | // LFS, LFD, STFS, STFD |
| 1492 | PPC::MOF_RPlusSImm16 | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetBeforeP9, |
| 1493 | PPC::MOF_RPlusLo | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetBeforeP9, |
| 1494 | PPC::MOF_NotAddNorCst | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetBeforeP9, |
| 1495 | PPC::MOF_AddrIsSImm32 | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetBeforeP9, |
| 1496 | }; |
| 1497 | AddrModesMap[PPC::AM_DSForm] = { |
| 1498 | // LWA |
| 1499 | PPC::MOF_SExt | PPC::MOF_RPlusSImm16Mult4 | PPC::MOF_WordInt, |
| 1500 | PPC::MOF_SExt | PPC::MOF_NotAddNorCst | PPC::MOF_WordInt, |
| 1501 | PPC::MOF_SExt | PPC::MOF_AddrIsSImm32 | PPC::MOF_WordInt, |
| 1502 | // LD, STD |
| 1503 | PPC::MOF_RPlusSImm16Mult4 | PPC::MOF_DoubleWordInt, |
| 1504 | PPC::MOF_NotAddNorCst | PPC::MOF_DoubleWordInt, |
| 1505 | PPC::MOF_AddrIsSImm32 | PPC::MOF_DoubleWordInt, |
| 1506 | // DFLOADf32, DFLOADf64, DSTOREf32, DSTOREf64 |
| 1507 | PPC::MOF_RPlusSImm16Mult4 | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetP9, |
| 1508 | PPC::MOF_NotAddNorCst | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetP9, |
| 1509 | PPC::MOF_AddrIsSImm32 | PPC::MOF_ScalarFloat | PPC::MOF_SubtargetP9, |
| 1510 | }; |
| 1511 | AddrModesMap[PPC::AM_DQForm] = { |
| 1512 | // LXV, STXV |
| 1513 | PPC::MOF_RPlusSImm16Mult16 | PPC::MOF_Vector | PPC::MOF_SubtargetP9, |
| 1514 | PPC::MOF_NotAddNorCst | PPC::MOF_Vector | PPC::MOF_SubtargetP9, |
| 1515 | PPC::MOF_AddrIsSImm32 | PPC::MOF_Vector | PPC::MOF_SubtargetP9, |
| 1516 | PPC::MOF_RPlusSImm16Mult16 | PPC::MOF_Vector256 | PPC::MOF_SubtargetP10, |
| 1517 | PPC::MOF_NotAddNorCst | PPC::MOF_Vector256 | PPC::MOF_SubtargetP10, |
| 1518 | PPC::MOF_AddrIsSImm32 | PPC::MOF_Vector256 | PPC::MOF_SubtargetP10, |
| 1519 | }; |
| 1520 | } |
| 1521 | |
| 1522 | /// getMaxByValAlign - Helper for getByValTypeAlignment to determine |
| 1523 | /// the desired ByVal argument alignment. |
| 1524 | static void getMaxByValAlign(Type *Ty, Align &MaxAlign, Align MaxMaxAlign) { |
| 1525 | if (MaxAlign == MaxMaxAlign) |
| 1526 | return; |
| 1527 | if (VectorType *VTy = dyn_cast<VectorType>(Ty)) { |
| 1528 | if (MaxMaxAlign >= 32 && |
| 1529 | VTy->getPrimitiveSizeInBits().getFixedSize() >= 256) |
| 1530 | MaxAlign = Align(32); |
| 1531 | else if (VTy->getPrimitiveSizeInBits().getFixedSize() >= 128 && |
| 1532 | MaxAlign < 16) |
| 1533 | MaxAlign = Align(16); |
| 1534 | } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) { |
| 1535 | Align EltAlign; |
| 1536 | getMaxByValAlign(ATy->getElementType(), EltAlign, MaxMaxAlign); |
| 1537 | if (EltAlign > MaxAlign) |
| 1538 | MaxAlign = EltAlign; |
| 1539 | } else if (StructType *STy = dyn_cast<StructType>(Ty)) { |
| 1540 | for (auto *EltTy : STy->elements()) { |
| 1541 | Align EltAlign; |
| 1542 | getMaxByValAlign(EltTy, EltAlign, MaxMaxAlign); |
| 1543 | if (EltAlign > MaxAlign) |
| 1544 | MaxAlign = EltAlign; |
| 1545 | if (MaxAlign == MaxMaxAlign) |
| 1546 | break; |
| 1547 | } |
| 1548 | } |
| 1549 | } |
| 1550 | |
| 1551 | /// getByValTypeAlignment - Return the desired alignment for ByVal aggregate |
| 1552 | /// function arguments in the caller parameter area. |
| 1553 | unsigned PPCTargetLowering::getByValTypeAlignment(Type *Ty, |
| 1554 | const DataLayout &DL) const { |
| 1555 | // 16byte and wider vectors are passed on 16byte boundary. |
| 1556 | // The rest is 8 on PPC64 and 4 on PPC32 boundary. |
| 1557 | Align Alignment = Subtarget.isPPC64() ? Align(8) : Align(4); |
| 1558 | if (Subtarget.hasAltivec()) |
| 1559 | getMaxByValAlign(Ty, Alignment, Align(16)); |
| 1560 | return Alignment.value(); |
| 1561 | } |
| 1562 | |
| 1563 | bool PPCTargetLowering::useSoftFloat() const { |
| 1564 | return Subtarget.useSoftFloat(); |
| 1565 | } |
| 1566 | |
| 1567 | bool PPCTargetLowering::hasSPE() const { |
| 1568 | return Subtarget.hasSPE(); |
| 1569 | } |
| 1570 | |
| 1571 | bool PPCTargetLowering::preferIncOfAddToSubOfNot(EVT VT) const { |
| 1572 | return VT.isScalarInteger(); |
| 1573 | } |
| 1574 | |
| 1575 | const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const { |
| 1576 | switch ((PPCISD::NodeType)Opcode) { |
| 1577 | case PPCISD::FIRST_NUMBER: break; |
| 1578 | case PPCISD::FSEL: return "PPCISD::FSEL"; |
| 1579 | case PPCISD::XSMAXCDP: return "PPCISD::XSMAXCDP"; |
| 1580 | case PPCISD::XSMINCDP: return "PPCISD::XSMINCDP"; |
| 1581 | case PPCISD::FCFID: return "PPCISD::FCFID"; |
| 1582 | case PPCISD::FCFIDU: return "PPCISD::FCFIDU"; |
| 1583 | case PPCISD::FCFIDS: return "PPCISD::FCFIDS"; |
| 1584 | case PPCISD::FCFIDUS: return "PPCISD::FCFIDUS"; |
| 1585 | case PPCISD::FCTIDZ: return "PPCISD::FCTIDZ"; |
| 1586 | case PPCISD::FCTIWZ: return "PPCISD::FCTIWZ"; |
| 1587 | case PPCISD::FCTIDUZ: return "PPCISD::FCTIDUZ"; |
| 1588 | case PPCISD::FCTIWUZ: return "PPCISD::FCTIWUZ"; |
| 1589 | case PPCISD::FP_TO_UINT_IN_VSR: |
| 1590 | return "PPCISD::FP_TO_UINT_IN_VSR,"; |
| 1591 | case PPCISD::FP_TO_SINT_IN_VSR: |
| 1592 | return "PPCISD::FP_TO_SINT_IN_VSR"; |
| 1593 | case PPCISD::FRE: return "PPCISD::FRE"; |
| 1594 | case PPCISD::FRSQRTE: return "PPCISD::FRSQRTE"; |
| 1595 | case PPCISD::FTSQRT: |
| 1596 | return "PPCISD::FTSQRT"; |
| 1597 | case PPCISD::FSQRT: |
| 1598 | return "PPCISD::FSQRT"; |
| 1599 | case PPCISD::STFIWX: return "PPCISD::STFIWX"; |
| 1600 | case PPCISD::VPERM: return "PPCISD::VPERM"; |
| 1601 | case PPCISD::XXSPLT: return "PPCISD::XXSPLT"; |
| 1602 | case PPCISD::XXSPLTI_SP_TO_DP: |
| 1603 | return "PPCISD::XXSPLTI_SP_TO_DP"; |
| 1604 | case PPCISD::XXSPLTI32DX: |
| 1605 | return "PPCISD::XXSPLTI32DX"; |
| 1606 | case PPCISD::VECINSERT: return "PPCISD::VECINSERT"; |
| 1607 | case PPCISD::XXPERMDI: return "PPCISD::XXPERMDI"; |
| 1608 | case PPCISD::VECSHL: return "PPCISD::VECSHL"; |
| 1609 | case PPCISD::CMPB: return "PPCISD::CMPB"; |
| 1610 | case PPCISD::Hi: return "PPCISD::Hi"; |
| 1611 | case PPCISD::Lo: return "PPCISD::Lo"; |
| 1612 | case PPCISD::TOC_ENTRY: return "PPCISD::TOC_ENTRY"; |
| 1613 | case PPCISD::ATOMIC_CMP_SWAP_8: return "PPCISD::ATOMIC_CMP_SWAP_8"; |
| 1614 | case PPCISD::ATOMIC_CMP_SWAP_16: return "PPCISD::ATOMIC_CMP_SWAP_16"; |
| 1615 | case PPCISD::DYNALLOC: return "PPCISD::DYNALLOC"; |
| 1616 | case PPCISD::DYNAREAOFFSET: return "PPCISD::DYNAREAOFFSET"; |
| 1617 | case PPCISD::PROBED_ALLOCA: return "PPCISD::PROBED_ALLOCA"; |
| 1618 | case PPCISD::GlobalBaseReg: return "PPCISD::GlobalBaseReg"; |
| 1619 | case PPCISD::SRL: return "PPCISD::SRL"; |
| 1620 | case PPCISD::SRA: return "PPCISD::SRA"; |
| 1621 | case PPCISD::SHL: return "PPCISD::SHL"; |
| 1622 | case PPCISD::SRA_ADDZE: return "PPCISD::SRA_ADDZE"; |
| 1623 | case PPCISD::CALL: return "PPCISD::CALL"; |
| 1624 | case PPCISD::CALL_NOP: return "PPCISD::CALL_NOP"; |
| 1625 | case PPCISD::CALL_NOTOC: return "PPCISD::CALL_NOTOC"; |
| 1626 | case PPCISD::MTCTR: return "PPCISD::MTCTR"; |
| 1627 | case PPCISD::BCTRL: return "PPCISD::BCTRL"; |
| 1628 | case PPCISD::BCTRL_LOAD_TOC: return "PPCISD::BCTRL_LOAD_TOC"; |
| 1629 | case PPCISD::RET_FLAG: return "PPCISD::RET_FLAG"; |
| 1630 | case PPCISD::READ_TIME_BASE: return "PPCISD::READ_TIME_BASE"; |
| 1631 | case PPCISD::EH_SJLJ_SETJMP: return "PPCISD::EH_SJLJ_SETJMP"; |
| 1632 | case PPCISD::EH_SJLJ_LONGJMP: return "PPCISD::EH_SJLJ_LONGJMP"; |
| 1633 | case PPCISD::MFOCRF: return "PPCISD::MFOCRF"; |
| 1634 | case PPCISD::MFVSR: return "PPCISD::MFVSR"; |
| 1635 | case PPCISD::MTVSRA: return "PPCISD::MTVSRA"; |
| 1636 | case PPCISD::MTVSRZ: return "PPCISD::MTVSRZ"; |
| 1637 | case PPCISD::SINT_VEC_TO_FP: return "PPCISD::SINT_VEC_TO_FP"; |
| 1638 | case PPCISD::UINT_VEC_TO_FP: return "PPCISD::UINT_VEC_TO_FP"; |
| 1639 | case PPCISD::SCALAR_TO_VECTOR_PERMUTED: |
| 1640 | return "PPCISD::SCALAR_TO_VECTOR_PERMUTED"; |
| 1641 | case PPCISD::ANDI_rec_1_EQ_BIT: |
| 1642 | return "PPCISD::ANDI_rec_1_EQ_BIT"; |
| 1643 | case PPCISD::ANDI_rec_1_GT_BIT: |
| 1644 | return "PPCISD::ANDI_rec_1_GT_BIT"; |
| 1645 | case PPCISD::VCMP: return "PPCISD::VCMP"; |
| 1646 | case PPCISD::VCMP_rec: return "PPCISD::VCMP_rec"; |
| 1647 | case PPCISD::LBRX: return "PPCISD::LBRX"; |
| 1648 | case PPCISD::STBRX: return "PPCISD::STBRX"; |
| 1649 | case PPCISD::LFIWAX: return "PPCISD::LFIWAX"; |
| 1650 | case PPCISD::LFIWZX: return "PPCISD::LFIWZX"; |
| 1651 | case PPCISD::LXSIZX: return "PPCISD::LXSIZX"; |
| 1652 | case PPCISD::STXSIX: return "PPCISD::STXSIX"; |
| 1653 | case PPCISD::VEXTS: return "PPCISD::VEXTS"; |
| 1654 | case PPCISD::LXVD2X: return "PPCISD::LXVD2X"; |
| 1655 | case PPCISD::STXVD2X: return "PPCISD::STXVD2X"; |
| 1656 | case PPCISD::LOAD_VEC_BE: return "PPCISD::LOAD_VEC_BE"; |
| 1657 | case PPCISD::STORE_VEC_BE: return "PPCISD::STORE_VEC_BE"; |
| 1658 | case PPCISD::ST_VSR_SCAL_INT: |
| 1659 | return "PPCISD::ST_VSR_SCAL_INT"; |
| 1660 | case PPCISD::COND_BRANCH: return "PPCISD::COND_BRANCH"; |
| 1661 | case PPCISD::BDNZ: return "PPCISD::BDNZ"; |
| 1662 | case PPCISD::BDZ: return "PPCISD::BDZ"; |
| 1663 | case PPCISD::MFFS: return "PPCISD::MFFS"; |
| 1664 | case PPCISD::FADDRTZ: return "PPCISD::FADDRTZ"; |
| 1665 | case PPCISD::TC_RETURN: return "PPCISD::TC_RETURN"; |
| 1666 | case PPCISD::CR6SET: return "PPCISD::CR6SET"; |
| 1667 | case PPCISD::CR6UNSET: return "PPCISD::CR6UNSET"; |
| 1668 | case PPCISD::PPC32_GOT: return "PPCISD::PPC32_GOT"; |
| 1669 | case PPCISD::PPC32_PICGOT: return "PPCISD::PPC32_PICGOT"; |
| 1670 | case PPCISD::ADDIS_GOT_TPREL_HA: return "PPCISD::ADDIS_GOT_TPREL_HA"; |
| 1671 | case PPCISD::LD_GOT_TPREL_L: return "PPCISD::LD_GOT_TPREL_L"; |
| 1672 | case PPCISD::ADD_TLS: return "PPCISD::ADD_TLS"; |
| 1673 | case PPCISD::ADDIS_TLSGD_HA: return "PPCISD::ADDIS_TLSGD_HA"; |
| 1674 | case PPCISD::ADDI_TLSGD_L: return "PPCISD::ADDI_TLSGD_L"; |
| 1675 | case PPCISD::GET_TLS_ADDR: return "PPCISD::GET_TLS_ADDR"; |
| 1676 | case PPCISD::ADDI_TLSGD_L_ADDR: return "PPCISD::ADDI_TLSGD_L_ADDR"; |
| 1677 | case PPCISD::TLSGD_AIX: return "PPCISD::TLSGD_AIX"; |
| 1678 | case PPCISD::ADDIS_TLSLD_HA: return "PPCISD::ADDIS_TLSLD_HA"; |
| 1679 | case PPCISD::ADDI_TLSLD_L: return "PPCISD::ADDI_TLSLD_L"; |
| 1680 | case PPCISD::GET_TLSLD_ADDR: return "PPCISD::GET_TLSLD_ADDR"; |
| 1681 | case PPCISD::ADDI_TLSLD_L_ADDR: return "PPCISD::ADDI_TLSLD_L_ADDR"; |
| 1682 | case PPCISD::ADDIS_DTPREL_HA: return "PPCISD::ADDIS_DTPREL_HA"; |
| 1683 | case PPCISD::ADDI_DTPREL_L: return "PPCISD::ADDI_DTPREL_L"; |
| 1684 | case PPCISD::PADDI_DTPREL: |
| 1685 | return "PPCISD::PADDI_DTPREL"; |
| 1686 | case PPCISD::VADD_SPLAT: return "PPCISD::VADD_SPLAT"; |
| 1687 | case PPCISD::SC: return "PPCISD::SC"; |
| 1688 | case PPCISD::CLRBHRB: return "PPCISD::CLRBHRB"; |
| 1689 | case PPCISD::MFBHRBE: return "PPCISD::MFBHRBE"; |
| 1690 | case PPCISD::RFEBB: return "PPCISD::RFEBB"; |
| 1691 | case PPCISD::XXSWAPD: return "PPCISD::XXSWAPD"; |
| 1692 | case PPCISD::SWAP_NO_CHAIN: return "PPCISD::SWAP_NO_CHAIN"; |
| 1693 | case PPCISD::VABSD: return "PPCISD::VABSD"; |
| 1694 | case PPCISD::BUILD_FP128: return "PPCISD::BUILD_FP128"; |
| 1695 | case PPCISD::BUILD_SPE64: return "PPCISD::BUILD_SPE64"; |
| 1696 | case PPCISD::EXTRACT_SPE: return "PPCISD::EXTRACT_SPE"; |
| 1697 | case PPCISD::EXTSWSLI: return "PPCISD::EXTSWSLI"; |
| 1698 | case PPCISD::LD_VSX_LH: return "PPCISD::LD_VSX_LH"; |
| 1699 | case PPCISD::FP_EXTEND_HALF: return "PPCISD::FP_EXTEND_HALF"; |
| 1700 | case PPCISD::MAT_PCREL_ADDR: return "PPCISD::MAT_PCREL_ADDR"; |
| 1701 | case PPCISD::TLS_DYNAMIC_MAT_PCREL_ADDR: |
| 1702 | return "PPCISD::TLS_DYNAMIC_MAT_PCREL_ADDR"; |
| 1703 | case PPCISD::TLS_LOCAL_EXEC_MAT_ADDR: |
| 1704 | return "PPCISD::TLS_LOCAL_EXEC_MAT_ADDR"; |
| 1705 | case PPCISD::ACC_BUILD: return "PPCISD::ACC_BUILD"; |
| 1706 | case PPCISD::PAIR_BUILD: return "PPCISD::PAIR_BUILD"; |
| 1707 | case PPCISD::EXTRACT_VSX_REG: return "PPCISD::EXTRACT_VSX_REG"; |
| 1708 | case PPCISD::XXMFACC: return "PPCISD::XXMFACC"; |
| 1709 | case PPCISD::LD_SPLAT: return "PPCISD::LD_SPLAT"; |
| 1710 | case PPCISD::FNMSUB: return "PPCISD::FNMSUB"; |
| 1711 | case PPCISD::STRICT_FADDRTZ: |
| 1712 | return "PPCISD::STRICT_FADDRTZ"; |
| 1713 | case PPCISD::STRICT_FCTIDZ: |
| 1714 | return "PPCISD::STRICT_FCTIDZ"; |
| 1715 | case PPCISD::STRICT_FCTIWZ: |
| 1716 | return "PPCISD::STRICT_FCTIWZ"; |
| 1717 | case PPCISD::STRICT_FCTIDUZ: |
| 1718 | return "PPCISD::STRICT_FCTIDUZ"; |
| 1719 | case PPCISD::STRICT_FCTIWUZ: |
| 1720 | return "PPCISD::STRICT_FCTIWUZ"; |
| 1721 | case PPCISD::STRICT_FCFID: |
| 1722 | return "PPCISD::STRICT_FCFID"; |
| 1723 | case PPCISD::STRICT_FCFIDU: |
| 1724 | return "PPCISD::STRICT_FCFIDU"; |
| 1725 | case PPCISD::STRICT_FCFIDS: |
| 1726 | return "PPCISD::STRICT_FCFIDS"; |
| 1727 | case PPCISD::STRICT_FCFIDUS: |
| 1728 | return "PPCISD::STRICT_FCFIDUS"; |
| 1729 | case PPCISD::LXVRZX: return "PPCISD::LXVRZX"; |
| 1730 | } |
| 1731 | return nullptr; |
| 1732 | } |
| 1733 | |
| 1734 | EVT PPCTargetLowering::getSetCCResultType(const DataLayout &DL, LLVMContext &C, |
| 1735 | EVT VT) const { |
| 1736 | if (!VT.isVector()) |
| 1737 | return Subtarget.useCRBits() ? MVT::i1 : MVT::i32; |
| 1738 | |
| 1739 | return VT.changeVectorElementTypeToInteger(); |
| 1740 | } |
| 1741 | |
| 1742 | bool PPCTargetLowering::enableAggressiveFMAFusion(EVT VT) const { |
| 1743 | 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?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 1743, __extension__ __PRETTY_FUNCTION__)); |
| 1744 | return true; |
| 1745 | } |
| 1746 | |
| 1747 | //===----------------------------------------------------------------------===// |
| 1748 | // Node matching predicates, for use by the tblgen matching code. |
| 1749 | //===----------------------------------------------------------------------===// |
| 1750 | |
| 1751 | /// isFloatingPointZero - Return true if this is 0.0 or -0.0. |
| 1752 | static bool isFloatingPointZero(SDValue Op) { |
| 1753 | if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op)) |
| 1754 | return CFP->getValueAPF().isZero(); |
| 1755 | else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) { |
| 1756 | // Maybe this has already been legalized into the constant pool? |
| 1757 | if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Op.getOperand(1))) |
| 1758 | if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal())) |
| 1759 | return CFP->getValueAPF().isZero(); |
| 1760 | } |
| 1761 | return false; |
| 1762 | } |
| 1763 | |
| 1764 | /// isConstantOrUndef - Op is either an undef node or a ConstantSDNode. Return |
| 1765 | /// true if Op is undef or if it matches the specified value. |
| 1766 | static bool isConstantOrUndef(int Op, int Val) { |
| 1767 | return Op < 0 || Op == Val; |
| 1768 | } |
| 1769 | |
| 1770 | /// isVPKUHUMShuffleMask - Return true if this is the shuffle mask for a |
| 1771 | /// VPKUHUM instruction. |
| 1772 | /// The ShuffleKind distinguishes between big-endian operations with |
| 1773 | /// two different inputs (0), either-endian operations with two identical |
| 1774 | /// inputs (1), and little-endian operations with two different inputs (2). |
| 1775 | /// For the latter, the input operands are swapped (see PPCInstrAltivec.td). |
| 1776 | bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind, |
| 1777 | SelectionDAG &DAG) { |
| 1778 | bool IsLE = DAG.getDataLayout().isLittleEndian(); |
| 1779 | if (ShuffleKind == 0) { |
| 1780 | if (IsLE) |
| 1781 | return false; |
| 1782 | for (unsigned i = 0; i != 16; ++i) |
| 1783 | if (!isConstantOrUndef(N->getMaskElt(i), i*2+1)) |
| 1784 | return false; |
| 1785 | } else if (ShuffleKind == 2) { |
| 1786 | if (!IsLE) |
| 1787 | return false; |
| 1788 | for (unsigned i = 0; i != 16; ++i) |
| 1789 | if (!isConstantOrUndef(N->getMaskElt(i), i*2)) |
| 1790 | return false; |
| 1791 | } else if (ShuffleKind == 1) { |
| 1792 | unsigned j = IsLE ? 0 : 1; |
| 1793 | for (unsigned i = 0; i != 8; ++i) |
| 1794 | if (!isConstantOrUndef(N->getMaskElt(i), i*2+j) || |
| 1795 | !isConstantOrUndef(N->getMaskElt(i+8), i*2+j)) |
| 1796 | return false; |
| 1797 | } |
| 1798 | return true; |
| 1799 | } |
| 1800 | |
| 1801 | /// isVPKUWUMShuffleMask - Return true if this is the shuffle mask for a |
| 1802 | /// VPKUWUM instruction. |
| 1803 | /// The ShuffleKind distinguishes between big-endian operations with |
| 1804 | /// two different inputs (0), either-endian operations with two identical |
| 1805 | /// inputs (1), and little-endian operations with two different inputs (2). |
| 1806 | /// For the latter, the input operands are swapped (see PPCInstrAltivec.td). |
| 1807 | bool PPC::isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind, |
| 1808 | SelectionDAG &DAG) { |
| 1809 | bool IsLE = DAG.getDataLayout().isLittleEndian(); |
| 1810 | if (ShuffleKind == 0) { |
| 1811 | if (IsLE) |
| 1812 | return false; |
| 1813 | for (unsigned i = 0; i != 16; i += 2) |
| 1814 | if (!isConstantOrUndef(N->getMaskElt(i ), i*2+2) || |
| 1815 | !isConstantOrUndef(N->getMaskElt(i+1), i*2+3)) |
| 1816 | return false; |
| 1817 | } else if (ShuffleKind == 2) { |
| 1818 | if (!IsLE) |
| 1819 | return false; |
| 1820 | for (unsigned i = 0; i != 16; i += 2) |
| 1821 | if (!isConstantOrUndef(N->getMaskElt(i ), i*2) || |
| 1822 | !isConstantOrUndef(N->getMaskElt(i+1), i*2+1)) |
| 1823 | return false; |
| 1824 | } else if (ShuffleKind == 1) { |
| 1825 | unsigned j = IsLE ? 0 : 2; |
| 1826 | for (unsigned i = 0; i != 8; i += 2) |
| 1827 | if (!isConstantOrUndef(N->getMaskElt(i ), i*2+j) || |
| 1828 | !isConstantOrUndef(N->getMaskElt(i+1), i*2+j+1) || |
| 1829 | !isConstantOrUndef(N->getMaskElt(i+8), i*2+j) || |
| 1830 | !isConstantOrUndef(N->getMaskElt(i+9), i*2+j+1)) |
| 1831 | return false; |
| 1832 | } |
| 1833 | return true; |
| 1834 | } |
| 1835 | |
| 1836 | /// isVPKUDUMShuffleMask - Return true if this is the shuffle mask for a |
| 1837 | /// VPKUDUM instruction, AND the VPKUDUM instruction exists for the |
| 1838 | /// current subtarget. |
| 1839 | /// |
| 1840 | /// The ShuffleKind distinguishes between big-endian operations with |
| 1841 | /// two different inputs (0), either-endian operations with two identical |
| 1842 | /// inputs (1), and little-endian operations with two different inputs (2). |
| 1843 | /// For the latter, the input operands are swapped (see PPCInstrAltivec.td). |
| 1844 | bool PPC::isVPKUDUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind, |
| 1845 | SelectionDAG &DAG) { |
| 1846 | const PPCSubtarget& Subtarget = |
| 1847 | static_cast<const PPCSubtarget&>(DAG.getSubtarget()); |
| 1848 | if (!Subtarget.hasP8Vector()) |
| 1849 | return false; |
| 1850 | |
| 1851 | bool IsLE = DAG.getDataLayout().isLittleEndian(); |
| 1852 | if (ShuffleKind == 0) { |
| 1853 | if (IsLE) |
| 1854 | return false; |
| 1855 | for (unsigned i = 0; i != 16; i += 4) |
| 1856 | if (!isConstantOrUndef(N->getMaskElt(i ), i*2+4) || |
| 1857 | !isConstantOrUndef(N->getMaskElt(i+1), i*2+5) || |
| 1858 | !isConstantOrUndef(N->getMaskElt(i+2), i*2+6) || |
| 1859 | !isConstantOrUndef(N->getMaskElt(i+3), i*2+7)) |
| 1860 | return false; |
| 1861 | } else if (ShuffleKind == 2) { |
| 1862 | if (!IsLE) |
| 1863 | return false; |
| 1864 | for (unsigned i = 0; i != 16; i += 4) |
| 1865 | if (!isConstantOrUndef(N->getMaskElt(i ), i*2) || |
| 1866 | !isConstantOrUndef(N->getMaskElt(i+1), i*2+1) || |
| 1867 | !isConstantOrUndef(N->getMaskElt(i+2), i*2+2) || |
| 1868 | !isConstantOrUndef(N->getMaskElt(i+3), i*2+3)) |
| 1869 | return false; |
| 1870 | } else if (ShuffleKind == 1) { |
| 1871 | unsigned j = IsLE ? 0 : 4; |
| 1872 | for (unsigned i = 0; i != 8; i += 4) |
| 1873 | if (!isConstantOrUndef(N->getMaskElt(i ), i*2+j) || |
| 1874 | !isConstantOrUndef(N->getMaskElt(i+1), i*2+j+1) || |
| 1875 | !isConstantOrUndef(N->getMaskElt(i+2), i*2+j+2) || |
| 1876 | !isConstantOrUndef(N->getMaskElt(i+3), i*2+j+3) || |
| 1877 | !isConstantOrUndef(N->getMaskElt(i+8), i*2+j) || |
| 1878 | !isConstantOrUndef(N->getMaskElt(i+9), i*2+j+1) || |
| 1879 | !isConstantOrUndef(N->getMaskElt(i+10), i*2+j+2) || |
| 1880 | !isConstantOrUndef(N->getMaskElt(i+11), i*2+j+3)) |
| 1881 | return false; |
| 1882 | } |
| 1883 | return true; |
| 1884 | } |
| 1885 | |
| 1886 | /// isVMerge - Common function, used to match vmrg* shuffles. |
| 1887 | /// |
| 1888 | static bool isVMerge(ShuffleVectorSDNode *N, unsigned UnitSize, |
| 1889 | unsigned LHSStart, unsigned RHSStart) { |
| 1890 | if (N->getValueType(0) != MVT::v16i8) |
| 1891 | return false; |
| 1892 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 1893, __extension__ __PRETTY_FUNCTION__)) |
| 1893 | "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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 1893, __extension__ __PRETTY_FUNCTION__)); |
| 1894 | |
| 1895 | for (unsigned i = 0; i != 8/UnitSize; ++i) // Step over units |
| 1896 | for (unsigned j = 0; j != UnitSize; ++j) { // Step over bytes within unit |
| 1897 | if (!isConstantOrUndef(N->getMaskElt(i*UnitSize*2+j), |
| 1898 | LHSStart+j+i*UnitSize) || |
| 1899 | !isConstantOrUndef(N->getMaskElt(i*UnitSize*2+UnitSize+j), |
| 1900 | RHSStart+j+i*UnitSize)) |
| 1901 | return false; |
| 1902 | } |
| 1903 | return true; |
| 1904 | } |
| 1905 | |
| 1906 | /// isVMRGLShuffleMask - Return true if this is a shuffle mask suitable for |
| 1907 | /// a VMRGL* instruction with the specified unit size (1,2 or 4 bytes). |
| 1908 | /// The ShuffleKind distinguishes between big-endian merges with two |
| 1909 | /// different inputs (0), either-endian merges with two identical inputs (1), |
| 1910 | /// and little-endian merges with two different inputs (2). For the latter, |
| 1911 | /// the input operands are swapped (see PPCInstrAltivec.td). |
| 1912 | bool PPC::isVMRGLShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize, |
| 1913 | unsigned ShuffleKind, SelectionDAG &DAG) { |
| 1914 | if (DAG.getDataLayout().isLittleEndian()) { |
| 1915 | if (ShuffleKind == 1) // unary |
| 1916 | return isVMerge(N, UnitSize, 0, 0); |
| 1917 | else if (ShuffleKind == 2) // swapped |
| 1918 | return isVMerge(N, UnitSize, 0, 16); |
| 1919 | else |
| 1920 | return false; |
| 1921 | } else { |
| 1922 | if (ShuffleKind == 1) // unary |
| 1923 | return isVMerge(N, UnitSize, 8, 8); |
| 1924 | else if (ShuffleKind == 0) // normal |
| 1925 | return isVMerge(N, UnitSize, 8, 24); |
| 1926 | else |
| 1927 | return false; |
| 1928 | } |
| 1929 | } |
| 1930 | |
| 1931 | /// isVMRGHShuffleMask - Return true if this is a shuffle mask suitable for |
| 1932 | /// a VMRGH* instruction with the specified unit size (1,2 or 4 bytes). |
| 1933 | /// The ShuffleKind distinguishes between big-endian merges with two |
| 1934 | /// different inputs (0), either-endian merges with two identical inputs (1), |
| 1935 | /// and little-endian merges with two different inputs (2). For the latter, |
| 1936 | /// the input operands are swapped (see PPCInstrAltivec.td). |
| 1937 | bool PPC::isVMRGHShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize, |
| 1938 | unsigned ShuffleKind, SelectionDAG &DAG) { |
| 1939 | if (DAG.getDataLayout().isLittleEndian()) { |
| 1940 | if (ShuffleKind == 1) // unary |
| 1941 | return isVMerge(N, UnitSize, 8, 8); |
| 1942 | else if (ShuffleKind == 2) // swapped |
| 1943 | return isVMerge(N, UnitSize, 8, 24); |
| 1944 | else |
| 1945 | return false; |
| 1946 | } else { |
| 1947 | if (ShuffleKind == 1) // unary |
| 1948 | return isVMerge(N, UnitSize, 0, 0); |
| 1949 | else if (ShuffleKind == 0) // normal |
| 1950 | return isVMerge(N, UnitSize, 0, 16); |
| 1951 | else |
| 1952 | return false; |
| 1953 | } |
| 1954 | } |
| 1955 | |
| 1956 | /** |
| 1957 | * Common function used to match vmrgew and vmrgow shuffles |
| 1958 | * |
| 1959 | * The indexOffset determines whether to look for even or odd words in |
| 1960 | * the shuffle mask. This is based on the of the endianness of the target |
| 1961 | * machine. |
| 1962 | * - Little Endian: |
| 1963 | * - Use offset of 0 to check for odd elements |
| 1964 | * - Use offset of 4 to check for even elements |
| 1965 | * - Big Endian: |
| 1966 | * - Use offset of 0 to check for even elements |
| 1967 | * - Use offset of 4 to check for odd elements |
| 1968 | * A detailed description of the vector element ordering for little endian and |
| 1969 | * big endian can be found at |
| 1970 | * http://www.ibm.com/developerworks/library/l-ibm-xl-c-cpp-compiler/index.html |
| 1971 | * Targeting your applications - what little endian and big endian IBM XL C/C++ |
| 1972 | * compiler differences mean to you |
| 1973 | * |
| 1974 | * The mask to the shuffle vector instruction specifies the indices of the |
| 1975 | * elements from the two input vectors to place in the result. The elements are |
| 1976 | * numbered in array-access order, starting with the first vector. These vectors |
| 1977 | * are always of type v16i8, thus each vector will contain 16 elements of size |
| 1978 | * 8. More info on the shuffle vector can be found in the |
| 1979 | * http://llvm.org/docs/LangRef.html#shufflevector-instruction |
| 1980 | * Language Reference. |
| 1981 | * |
| 1982 | * The RHSStartValue indicates whether the same input vectors are used (unary) |
| 1983 | * or two different input vectors are used, based on the following: |
| 1984 | * - If the instruction uses the same vector for both inputs, the range of the |
| 1985 | * indices will be 0 to 15. In this case, the RHSStart value passed should |
| 1986 | * be 0. |
| 1987 | * - If the instruction has two different vectors then the range of the |
| 1988 | * indices will be 0 to 31. In this case, the RHSStart value passed should |
| 1989 | * be 16 (indices 0-15 specify elements in the first vector while indices 16 |
| 1990 | * to 31 specify elements in the second vector). |
| 1991 | * |
| 1992 | * \param[in] N The shuffle vector SD Node to analyze |
| 1993 | * \param[in] IndexOffset Specifies whether to look for even or odd elements |
| 1994 | * \param[in] RHSStartValue Specifies the starting index for the righthand input |
| 1995 | * vector to the shuffle_vector instruction |
| 1996 | * \return true iff this shuffle vector represents an even or odd word merge |
| 1997 | */ |
| 1998 | static bool isVMerge(ShuffleVectorSDNode *N, unsigned IndexOffset, |
| 1999 | unsigned RHSStartValue) { |
| 2000 | if (N->getValueType(0) != MVT::v16i8) |
| 2001 | return false; |
| 2002 | |
| 2003 | for (unsigned i = 0; i < 2; ++i) |
| 2004 | for (unsigned j = 0; j < 4; ++j) |
| 2005 | if (!isConstantOrUndef(N->getMaskElt(i*4+j), |
| 2006 | i*RHSStartValue+j+IndexOffset) || |
| 2007 | !isConstantOrUndef(N->getMaskElt(i*4+j+8), |
| 2008 | i*RHSStartValue+j+IndexOffset+8)) |
| 2009 | return false; |
| 2010 | return true; |
| 2011 | } |
| 2012 | |
| 2013 | /** |
| 2014 | * Determine if the specified shuffle mask is suitable for the vmrgew or |
| 2015 | * vmrgow instructions. |
| 2016 | * |
| 2017 | * \param[in] N The shuffle vector SD Node to analyze |
| 2018 | * \param[in] CheckEven Check for an even merge (true) or an odd merge (false) |
| 2019 | * \param[in] ShuffleKind Identify the type of merge: |
| 2020 | * - 0 = big-endian merge with two different inputs; |
| 2021 | * - 1 = either-endian merge with two identical inputs; |
| 2022 | * - 2 = little-endian merge with two different inputs (inputs are swapped for |
| 2023 | * little-endian merges). |
| 2024 | * \param[in] DAG The current SelectionDAG |
| 2025 | * \return true iff this shuffle mask |
| 2026 | */ |
| 2027 | bool PPC::isVMRGEOShuffleMask(ShuffleVectorSDNode *N, bool CheckEven, |
| 2028 | unsigned ShuffleKind, SelectionDAG &DAG) { |
| 2029 | if (DAG.getDataLayout().isLittleEndian()) { |
| 2030 | unsigned indexOffset = CheckEven ? 4 : 0; |
| 2031 | if (ShuffleKind == 1) // Unary |
| 2032 | return isVMerge(N, indexOffset, 0); |
| 2033 | else if (ShuffleKind == 2) // swapped |
| 2034 | return isVMerge(N, indexOffset, 16); |
| 2035 | else |
| 2036 | return false; |
| 2037 | } |
| 2038 | else { |
| 2039 | unsigned indexOffset = CheckEven ? 0 : 4; |
| 2040 | if (ShuffleKind == 1) // Unary |
| 2041 | return isVMerge(N, indexOffset, 0); |
| 2042 | else if (ShuffleKind == 0) // Normal |
| 2043 | return isVMerge(N, indexOffset, 16); |
| 2044 | else |
| 2045 | return false; |
| 2046 | } |
| 2047 | return false; |
| 2048 | } |
| 2049 | |
| 2050 | /// isVSLDOIShuffleMask - If this is a vsldoi shuffle mask, return the shift |
| 2051 | /// amount, otherwise return -1. |
| 2052 | /// The ShuffleKind distinguishes between big-endian operations with two |
| 2053 | /// different inputs (0), either-endian operations with two identical inputs |
| 2054 | /// (1), and little-endian operations with two different inputs (2). For the |
| 2055 | /// latter, the input operands are swapped (see PPCInstrAltivec.td). |
| 2056 | int PPC::isVSLDOIShuffleMask(SDNode *N, unsigned ShuffleKind, |
| 2057 | SelectionDAG &DAG) { |
| 2058 | if (N->getValueType(0) != MVT::v16i8) |
| 2059 | return -1; |
| 2060 | |
| 2061 | ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N); |
| 2062 | |
| 2063 | // Find the first non-undef value in the shuffle mask. |
| 2064 | unsigned i; |
| 2065 | for (i = 0; i != 16 && SVOp->getMaskElt(i) < 0; ++i) |
| 2066 | /*search*/; |
| 2067 | |
| 2068 | if (i == 16) return -1; // all undef. |
| 2069 | |
| 2070 | // Otherwise, check to see if the rest of the elements are consecutively |
| 2071 | // numbered from this value. |
| 2072 | unsigned ShiftAmt = SVOp->getMaskElt(i); |
| 2073 | if (ShiftAmt < i) return -1; |
| 2074 | |
| 2075 | ShiftAmt -= i; |
| 2076 | bool isLE = DAG.getDataLayout().isLittleEndian(); |
| 2077 | |
| 2078 | if ((ShuffleKind == 0 && !isLE) || (ShuffleKind == 2 && isLE)) { |
| 2079 | // Check the rest of the elements to see if they are consecutive. |
| 2080 | for (++i; i != 16; ++i) |
| 2081 | if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt+i)) |
| 2082 | return -1; |
| 2083 | } else if (ShuffleKind == 1) { |
| 2084 | // Check the rest of the elements to see if they are consecutive. |
| 2085 | for (++i; i != 16; ++i) |
| 2086 | if (!isConstantOrUndef(SVOp->getMaskElt(i), (ShiftAmt+i) & 15)) |
| 2087 | return -1; |
| 2088 | } else |
| 2089 | return -1; |
| 2090 | |
| 2091 | if (isLE) |
| 2092 | ShiftAmt = 16 - ShiftAmt; |
| 2093 | |
| 2094 | return ShiftAmt; |
| 2095 | } |
| 2096 | |
| 2097 | /// isSplatShuffleMask - Return true if the specified VECTOR_SHUFFLE operand |
| 2098 | /// specifies a splat of a single element that is suitable for input to |
| 2099 | /// one of the splat operations (VSPLTB/VSPLTH/VSPLTW/XXSPLTW/LXVDSX/etc.). |
| 2100 | bool PPC::isSplatShuffleMask(ShuffleVectorSDNode *N, unsigned EltSize) { |
| 2101 | assert(N->getValueType(0) == MVT::v16i8 && isPowerOf2_32(EltSize) &&(static_cast <bool> (N->getValueType(0) == MVT::v16i8 && isPowerOf2_32(EltSize) && EltSize <= 8 && "Can only handle 1,2,4,8 byte element sizes") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::v16i8 && isPowerOf2_32(EltSize) && EltSize <= 8 && \"Can only handle 1,2,4,8 byte element sizes\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2102, __extension__ __PRETTY_FUNCTION__)) |
| 2102 | EltSize <= 8 && "Can only handle 1,2,4,8 byte element sizes")(static_cast <bool> (N->getValueType(0) == MVT::v16i8 && isPowerOf2_32(EltSize) && EltSize <= 8 && "Can only handle 1,2,4,8 byte element sizes") ? void (0) : __assert_fail ("N->getValueType(0) == MVT::v16i8 && isPowerOf2_32(EltSize) && EltSize <= 8 && \"Can only handle 1,2,4,8 byte element sizes\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2102, __extension__ __PRETTY_FUNCTION__)); |
| 2103 | |
| 2104 | // The consecutive indices need to specify an element, not part of two |
| 2105 | // different elements. So abandon ship early if this isn't the case. |
| 2106 | if (N->getMaskElt(0) % EltSize != 0) |
| 2107 | return false; |
| 2108 | |
| 2109 | // This is a splat operation if each element of the permute is the same, and |
| 2110 | // if the value doesn't reference the second vector. |
| 2111 | unsigned ElementBase = N->getMaskElt(0); |
| 2112 | |
| 2113 | // FIXME: Handle UNDEF elements too! |
| 2114 | if (ElementBase >= 16) |
| 2115 | return false; |
| 2116 | |
| 2117 | // Check that the indices are consecutive, in the case of a multi-byte element |
| 2118 | // splatted with a v16i8 mask. |
| 2119 | for (unsigned i = 1; i != EltSize; ++i) |
| 2120 | if (N->getMaskElt(i) < 0 || N->getMaskElt(i) != (int)(i+ElementBase)) |
| 2121 | return false; |
| 2122 | |
| 2123 | for (unsigned i = EltSize, e = 16; i != e; i += EltSize) { |
| 2124 | if (N->getMaskElt(i) < 0) continue; |
| 2125 | for (unsigned j = 0; j != EltSize; ++j) |
| 2126 | if (N->getMaskElt(i+j) != N->getMaskElt(j)) |
| 2127 | return false; |
| 2128 | } |
| 2129 | return true; |
| 2130 | } |
| 2131 | |
| 2132 | /// Check that the mask is shuffling N byte elements. Within each N byte |
| 2133 | /// element of the mask, the indices could be either in increasing or |
| 2134 | /// decreasing order as long as they are consecutive. |
| 2135 | /// \param[in] N the shuffle vector SD Node to analyze |
| 2136 | /// \param[in] Width the element width in bytes, could be 2/4/8/16 (HalfWord/ |
| 2137 | /// Word/DoubleWord/QuadWord). |
| 2138 | /// \param[in] StepLen the delta indices number among the N byte element, if |
| 2139 | /// the mask is in increasing/decreasing order then it is 1/-1. |
| 2140 | /// \return true iff the mask is shuffling N byte elements. |
| 2141 | static bool isNByteElemShuffleMask(ShuffleVectorSDNode *N, unsigned Width, |
| 2142 | int StepLen) { |
| 2143 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2144, __extension__ __PRETTY_FUNCTION__)) |
| 2144 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2144, __extension__ __PRETTY_FUNCTION__)); |
| 2145 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2145, __extension__ __PRETTY_FUNCTION__)); |
| 2146 | |
| 2147 | unsigned NumOfElem = 16 / Width; |
| 2148 | unsigned MaskVal[16]; // Width is never greater than 16 |
| 2149 | for (unsigned i = 0; i < NumOfElem; ++i) { |
| 2150 | MaskVal[0] = N->getMaskElt(i * Width); |
| 2151 | if ((StepLen == 1) && (MaskVal[0] % Width)) { |
| 2152 | return false; |
| 2153 | } else if ((StepLen == -1) && ((MaskVal[0] + 1) % Width)) { |
| 2154 | return false; |
| 2155 | } |
| 2156 | |
| 2157 | for (unsigned int j = 1; j < Width; ++j) { |
| 2158 | MaskVal[j] = N->getMaskElt(i * Width + j); |
| 2159 | if (MaskVal[j] != MaskVal[j-1] + StepLen) { |
| 2160 | return false; |
| 2161 | } |
| 2162 | } |
| 2163 | } |
| 2164 | |
| 2165 | return true; |
| 2166 | } |
| 2167 | |
| 2168 | bool PPC::isXXINSERTWMask(ShuffleVectorSDNode *N, unsigned &ShiftElts, |
| 2169 | unsigned &InsertAtByte, bool &Swap, bool IsLE) { |
| 2170 | if (!isNByteElemShuffleMask(N, 4, 1)) |
| 2171 | return false; |
| 2172 | |
| 2173 | // Now we look at mask elements 0,4,8,12 |
| 2174 | unsigned M0 = N->getMaskElt(0) / 4; |
| 2175 | unsigned M1 = N->getMaskElt(4) / 4; |
| 2176 | unsigned M2 = N->getMaskElt(8) / 4; |
| 2177 | unsigned M3 = N->getMaskElt(12) / 4; |
| 2178 | unsigned LittleEndianShifts[] = { 2, 1, 0, 3 }; |
| 2179 | unsigned BigEndianShifts[] = { 3, 0, 1, 2 }; |
| 2180 | |
| 2181 | // Below, let H and L be arbitrary elements of the shuffle mask |
| 2182 | // where H is in the range [4,7] and L is in the range [0,3]. |
| 2183 | // H, 1, 2, 3 or L, 5, 6, 7 |
| 2184 | if ((M0 > 3 && M1 == 1 && M2 == 2 && M3 == 3) || |
| 2185 | (M0 < 4 && M1 == 5 && M2 == 6 && M3 == 7)) { |
| 2186 | ShiftElts = IsLE ? LittleEndianShifts[M0 & 0x3] : BigEndianShifts[M0 & 0x3]; |
| 2187 | InsertAtByte = IsLE ? 12 : 0; |
| 2188 | Swap = M0 < 4; |
| 2189 | return true; |
| 2190 | } |
| 2191 | // 0, H, 2, 3 or 4, L, 6, 7 |
| 2192 | if ((M1 > 3 && M0 == 0 && M2 == 2 && M3 == 3) || |
| 2193 | (M1 < 4 && M0 == 4 && M2 == 6 && M3 == 7)) { |
| 2194 | ShiftElts = IsLE ? LittleEndianShifts[M1 & 0x3] : BigEndianShifts[M1 & 0x3]; |
| 2195 | InsertAtByte = IsLE ? 8 : 4; |
| 2196 | Swap = M1 < 4; |
| 2197 | return true; |
| 2198 | } |
| 2199 | // 0, 1, H, 3 or 4, 5, L, 7 |
| 2200 | if ((M2 > 3 && M0 == 0 && M1 == 1 && M3 == 3) || |
| 2201 | (M2 < 4 && M0 == 4 && M1 == 5 && M3 == 7)) { |
| 2202 | ShiftElts = IsLE ? LittleEndianShifts[M2 & 0x3] : BigEndianShifts[M2 & 0x3]; |
| 2203 | InsertAtByte = IsLE ? 4 : 8; |
| 2204 | Swap = M2 < 4; |
| 2205 | return true; |
| 2206 | } |
| 2207 | // 0, 1, 2, H or 4, 5, 6, L |
| 2208 | if ((M3 > 3 && M0 == 0 && M1 == 1 && M2 == 2) || |
| 2209 | (M3 < 4 && M0 == 4 && M1 == 5 && M2 == 6)) { |
| 2210 | ShiftElts = IsLE ? LittleEndianShifts[M3 & 0x3] : BigEndianShifts[M3 & 0x3]; |
| 2211 | InsertAtByte = IsLE ? 0 : 12; |
| 2212 | Swap = M3 < 4; |
| 2213 | return true; |
| 2214 | } |
| 2215 | |
| 2216 | // If both vector operands for the shuffle are the same vector, the mask will |
| 2217 | // contain only elements from the first one and the second one will be undef. |
| 2218 | if (N->getOperand(1).isUndef()) { |
| 2219 | ShiftElts = 0; |
| 2220 | Swap = true; |
| 2221 | unsigned XXINSERTWSrcElem = IsLE ? 2 : 1; |
| 2222 | if (M0 == XXINSERTWSrcElem && M1 == 1 && M2 == 2 && M3 == 3) { |
| 2223 | InsertAtByte = IsLE ? 12 : 0; |
| 2224 | return true; |
| 2225 | } |
| 2226 | if (M0 == 0 && M1 == XXINSERTWSrcElem && M2 == 2 && M3 == 3) { |
| 2227 | InsertAtByte = IsLE ? 8 : 4; |
| 2228 | return true; |
| 2229 | } |
| 2230 | if (M0 == 0 && M1 == 1 && M2 == XXINSERTWSrcElem && M3 == 3) { |
| 2231 | InsertAtByte = IsLE ? 4 : 8; |
| 2232 | return true; |
| 2233 | } |
| 2234 | if (M0 == 0 && M1 == 1 && M2 == 2 && M3 == XXINSERTWSrcElem) { |
| 2235 | InsertAtByte = IsLE ? 0 : 12; |
| 2236 | return true; |
| 2237 | } |
| 2238 | } |
| 2239 | |
| 2240 | return false; |
| 2241 | } |
| 2242 | |
| 2243 | bool PPC::isXXSLDWIShuffleMask(ShuffleVectorSDNode *N, unsigned &ShiftElts, |
| 2244 | bool &Swap, bool IsLE) { |
| 2245 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2245, __extension__ __PRETTY_FUNCTION__)); |
| 2246 | // Ensure each byte index of the word is consecutive. |
| 2247 | if (!isNByteElemShuffleMask(N, 4, 1)) |
| 2248 | return false; |
| 2249 | |
| 2250 | // Now we look at mask elements 0,4,8,12, which are the beginning of words. |
| 2251 | unsigned M0 = N->getMaskElt(0) / 4; |
| 2252 | unsigned M1 = N->getMaskElt(4) / 4; |
| 2253 | unsigned M2 = N->getMaskElt(8) / 4; |
| 2254 | unsigned M3 = N->getMaskElt(12) / 4; |
| 2255 | |
| 2256 | // If both vector operands for the shuffle are the same vector, the mask will |
| 2257 | // contain only elements from the first one and the second one will be undef. |
| 2258 | if (N->getOperand(1).isUndef()) { |
| 2259 | 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?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2259, __extension__ __PRETTY_FUNCTION__)); |
| 2260 | if (M1 != (M0 + 1) % 4 || M2 != (M1 + 1) % 4 || M3 != (M2 + 1) % 4) |
| 2261 | return false; |
| 2262 | |
| 2263 | ShiftElts = IsLE ? (4 - M0) % 4 : M0; |
| 2264 | Swap = false; |
| 2265 | return true; |
| 2266 | } |
| 2267 | |
| 2268 | // Ensure each word index of the ShuffleVector Mask is consecutive. |
| 2269 | if (M1 != (M0 + 1) % 8 || M2 != (M1 + 1) % 8 || M3 != (M2 + 1) % 8) |
| 2270 | return false; |
| 2271 | |
| 2272 | if (IsLE) { |
| 2273 | if (M0 == 0 || M0 == 7 || M0 == 6 || M0 == 5) { |
| 2274 | // Input vectors don't need to be swapped if the leading element |
| 2275 | // of the result is one of the 3 left elements of the second vector |
| 2276 | // (or if there is no shift to be done at all). |
| 2277 | Swap = false; |
| 2278 | ShiftElts = (8 - M0) % 8; |
| 2279 | } else if (M0 == 4 || M0 == 3 || M0 == 2 || M0 == 1) { |
| 2280 | // Input vectors need to be swapped if the leading element |
| 2281 | // of the result is one of the 3 left elements of the first vector |
| 2282 | // (or if we're shifting by 4 - thereby simply swapping the vectors). |
| 2283 | Swap = true; |
| 2284 | ShiftElts = (4 - M0) % 4; |
| 2285 | } |
| 2286 | |
| 2287 | return true; |
| 2288 | } else { // BE |
| 2289 | if (M0 == 0 || M0 == 1 || M0 == 2 || M0 == 3) { |
| 2290 | // Input vectors don't need to be swapped if the leading element |
| 2291 | // of the result is one of the 4 elements of the first vector. |
| 2292 | Swap = false; |
| 2293 | ShiftElts = M0; |
| 2294 | } else if (M0 == 4 || M0 == 5 || M0 == 6 || M0 == 7) { |
| 2295 | // Input vectors need to be swapped if the leading element |
| 2296 | // of the result is one of the 4 elements of the right vector. |
| 2297 | Swap = true; |
| 2298 | ShiftElts = M0 - 4; |
| 2299 | } |
| 2300 | |
| 2301 | return true; |
| 2302 | } |
| 2303 | } |
| 2304 | |
| 2305 | bool static isXXBRShuffleMaskHelper(ShuffleVectorSDNode *N, int Width) { |
| 2306 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2306, __extension__ __PRETTY_FUNCTION__)); |
| 2307 | |
| 2308 | if (!isNByteElemShuffleMask(N, Width, -1)) |
| 2309 | return false; |
| 2310 | |
| 2311 | for (int i = 0; i < 16; i += Width) |
| 2312 | if (N->getMaskElt(i) != i + Width - 1) |
| 2313 | return false; |
| 2314 | |
| 2315 | return true; |
| 2316 | } |
| 2317 | |
| 2318 | bool PPC::isXXBRHShuffleMask(ShuffleVectorSDNode *N) { |
| 2319 | return isXXBRShuffleMaskHelper(N, 2); |
| 2320 | } |
| 2321 | |
| 2322 | bool PPC::isXXBRWShuffleMask(ShuffleVectorSDNode *N) { |
| 2323 | return isXXBRShuffleMaskHelper(N, 4); |
| 2324 | } |
| 2325 | |
| 2326 | bool PPC::isXXBRDShuffleMask(ShuffleVectorSDNode *N) { |
| 2327 | return isXXBRShuffleMaskHelper(N, 8); |
| 2328 | } |
| 2329 | |
| 2330 | bool PPC::isXXBRQShuffleMask(ShuffleVectorSDNode *N) { |
| 2331 | return isXXBRShuffleMaskHelper(N, 16); |
| 2332 | } |
| 2333 | |
| 2334 | /// Can node \p N be lowered to an XXPERMDI instruction? If so, set \p Swap |
| 2335 | /// if the inputs to the instruction should be swapped and set \p DM to the |
| 2336 | /// value for the immediate. |
| 2337 | /// Specifically, set \p Swap to true only if \p N can be lowered to XXPERMDI |
| 2338 | /// AND element 0 of the result comes from the first input (LE) or second input |
| 2339 | /// (BE). Set \p DM to the calculated result (0-3) only if \p N can be lowered. |
| 2340 | /// \return true iff the given mask of shuffle node \p N is a XXPERMDI shuffle |
| 2341 | /// mask. |
| 2342 | bool PPC::isXXPERMDIShuffleMask(ShuffleVectorSDNode *N, unsigned &DM, |
| 2343 | bool &Swap, bool IsLE) { |
| 2344 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2344, __extension__ __PRETTY_FUNCTION__)); |
| 2345 | |
| 2346 | // Ensure each byte index of the double word is consecutive. |
| 2347 | if (!isNByteElemShuffleMask(N, 8, 1)) |
| 2348 | return false; |
| 2349 | |
| 2350 | unsigned M0 = N->getMaskElt(0) / 8; |
| 2351 | unsigned M1 = N->getMaskElt(8) / 8; |
| 2352 | 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?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2352, __extension__ __PRETTY_FUNCTION__)); |
| 2353 | |
| 2354 | // If both vector operands for the shuffle are the same vector, the mask will |
| 2355 | // contain only elements from the first one and the second one will be undef. |
| 2356 | if (N->getOperand(1).isUndef()) { |
| 2357 | if ((M0 | M1) < 2) { |
| 2358 | DM = IsLE ? (((~M1) & 1) << 1) + ((~M0) & 1) : (M0 << 1) + (M1 & 1); |
| 2359 | Swap = false; |
| 2360 | return true; |
| 2361 | } else |
| 2362 | return false; |
| 2363 | } |
| 2364 | |
| 2365 | if (IsLE) { |
| 2366 | if (M0 > 1 && M1 < 2) { |
| 2367 | Swap = false; |
| 2368 | } else if (M0 < 2 && M1 > 1) { |
| 2369 | M0 = (M0 + 2) % 4; |
| 2370 | M1 = (M1 + 2) % 4; |
| 2371 | Swap = true; |
| 2372 | } else |
| 2373 | return false; |
| 2374 | |
| 2375 | // Note: if control flow comes here that means Swap is already set above |
| 2376 | DM = (((~M1) & 1) << 1) + ((~M0) & 1); |
| 2377 | return true; |
| 2378 | } else { // BE |
| 2379 | if (M0 < 2 && M1 > 1) { |
| 2380 | Swap = false; |
| 2381 | } else if (M0 > 1 && M1 < 2) { |
| 2382 | M0 = (M0 + 2) % 4; |
| 2383 | M1 = (M1 + 2) % 4; |
| 2384 | Swap = true; |
| 2385 | } else |
| 2386 | return false; |
| 2387 | |
| 2388 | // Note: if control flow comes here that means Swap is already set above |
| 2389 | DM = (M0 << 1) + (M1 & 1); |
| 2390 | return true; |
| 2391 | } |
| 2392 | } |
| 2393 | |
| 2394 | |
| 2395 | /// getSplatIdxForPPCMnemonics - Return the splat index as a value that is |
| 2396 | /// appropriate for PPC mnemonics (which have a big endian bias - namely |
| 2397 | /// elements are counted from the left of the vector register). |
| 2398 | unsigned PPC::getSplatIdxForPPCMnemonics(SDNode *N, unsigned EltSize, |
| 2399 | SelectionDAG &DAG) { |
| 2400 | ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N); |
| 2401 | assert(isSplatShuffleMask(SVOp, EltSize))(static_cast <bool> (isSplatShuffleMask(SVOp, EltSize)) ? void (0) : __assert_fail ("isSplatShuffleMask(SVOp, EltSize)" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2401, __extension__ __PRETTY_FUNCTION__)); |
| 2402 | if (DAG.getDataLayout().isLittleEndian()) |
| 2403 | return (16 / EltSize) - 1 - (SVOp->getMaskElt(0) / EltSize); |
| 2404 | else |
| 2405 | return SVOp->getMaskElt(0) / EltSize; |
| 2406 | } |
| 2407 | |
| 2408 | /// get_VSPLTI_elt - If this is a build_vector of constants which can be formed |
| 2409 | /// by using a vspltis[bhw] instruction of the specified element size, return |
| 2410 | /// the constant being splatted. The ByteSize field indicates the number of |
| 2411 | /// bytes of each element [124] -> [bhw]. |
| 2412 | SDValue PPC::get_VSPLTI_elt(SDNode *N, unsigned ByteSize, SelectionDAG &DAG) { |
| 2413 | SDValue OpVal(nullptr, 0); |
| 2414 | |
| 2415 | // If ByteSize of the splat is bigger than the element size of the |
| 2416 | // build_vector, then we have a case where we are checking for a splat where |
| 2417 | // multiple elements of the buildvector are folded together into a single |
| 2418 | // logical element of the splat (e.g. "vsplish 1" to splat {0,1}*8). |
| 2419 | unsigned EltSize = 16/N->getNumOperands(); |
| 2420 | if (EltSize < ByteSize) { |
| 2421 | unsigned Multiple = ByteSize/EltSize; // Number of BV entries per spltval. |
| 2422 | SDValue UniquedVals[4]; |
| 2423 | 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?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2423, __extension__ __PRETTY_FUNCTION__)); |
| 2424 | |
| 2425 | // See if all of the elements in the buildvector agree across. |
| 2426 | for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { |
| 2427 | if (N->getOperand(i).isUndef()) continue; |
| 2428 | // If the element isn't a constant, bail fully out. |
| 2429 | if (!isa<ConstantSDNode>(N->getOperand(i))) return SDValue(); |
| 2430 | |
| 2431 | if (!UniquedVals[i&(Multiple-1)].getNode()) |
| 2432 | UniquedVals[i&(Multiple-1)] = N->getOperand(i); |
| 2433 | else if (UniquedVals[i&(Multiple-1)] != N->getOperand(i)) |
| 2434 | return SDValue(); // no match. |
| 2435 | } |
| 2436 | |
| 2437 | // Okay, if we reached this point, UniquedVals[0..Multiple-1] contains |
| 2438 | // either constant or undef values that are identical for each chunk. See |
| 2439 | // if these chunks can form into a larger vspltis*. |
| 2440 | |
| 2441 | // Check to see if all of the leading entries are either 0 or -1. If |
| 2442 | // neither, then this won't fit into the immediate field. |
| 2443 | bool LeadingZero = true; |
| 2444 | bool LeadingOnes = true; |
| 2445 | for (unsigned i = 0; i != Multiple-1; ++i) { |
| 2446 | if (!UniquedVals[i].getNode()) continue; // Must have been undefs. |
| 2447 | |
| 2448 | LeadingZero &= isNullConstant(UniquedVals[i]); |
| 2449 | LeadingOnes &= isAllOnesConstant(UniquedVals[i]); |
| 2450 | } |
| 2451 | // Finally, check the least significant entry. |
| 2452 | if (LeadingZero) { |
| 2453 | if (!UniquedVals[Multiple-1].getNode()) |
| 2454 | return DAG.getTargetConstant(0, SDLoc(N), MVT::i32); // 0,0,0,undef |
| 2455 | int Val = cast<ConstantSDNode>(UniquedVals[Multiple-1])->getZExtValue(); |
| 2456 | if (Val < 16) // 0,0,0,4 -> vspltisw(4) |
| 2457 | return DAG.getTargetConstant(Val, SDLoc(N), MVT::i32); |
| 2458 | } |
| 2459 | if (LeadingOnes) { |
| 2460 | if (!UniquedVals[Multiple-1].getNode()) |
| 2461 | return DAG.getTargetConstant(~0U, SDLoc(N), MVT::i32); // -1,-1,-1,undef |
| 2462 | int Val =cast<ConstantSDNode>(UniquedVals[Multiple-1])->getSExtValue(); |
| 2463 | if (Val >= -16) // -1,-1,-1,-2 -> vspltisw(-2) |
| 2464 | return DAG.getTargetConstant(Val, SDLoc(N), MVT::i32); |
| 2465 | } |
| 2466 | |
| 2467 | return SDValue(); |
| 2468 | } |
| 2469 | |
| 2470 | // Check to see if this buildvec has a single non-undef value in its elements. |
| 2471 | for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) { |
| 2472 | if (N->getOperand(i).isUndef()) continue; |
| 2473 | if (!OpVal.getNode()) |
| 2474 | OpVal = N->getOperand(i); |
| 2475 | else if (OpVal != N->getOperand(i)) |
| 2476 | return SDValue(); |
| 2477 | } |
| 2478 | |
| 2479 | if (!OpVal.getNode()) return SDValue(); // All UNDEF: use implicit def. |
| 2480 | |
| 2481 | unsigned ValSizeInBytes = EltSize; |
| 2482 | uint64_t Value = 0; |
| 2483 | if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal)) { |
| 2484 | Value = CN->getZExtValue(); |
| 2485 | } else if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(OpVal)) { |
| 2486 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2486, __extension__ __PRETTY_FUNCTION__)); |
| 2487 | Value = FloatToBits(CN->getValueAPF().convertToFloat()); |
| 2488 | } |
| 2489 | |
| 2490 | // If the splat value is larger than the element value, then we can never do |
| 2491 | // this splat. The only case that we could fit the replicated bits into our |
| 2492 | // immediate field for would be zero, and we prefer to use vxor for it. |
| 2493 | if (ValSizeInBytes < ByteSize) return SDValue(); |
| 2494 | |
| 2495 | // If the element value is larger than the splat value, check if it consists |
| 2496 | // of a repeated bit pattern of size ByteSize. |
| 2497 | if (!APInt(ValSizeInBytes * 8, Value).isSplat(ByteSize * 8)) |
| 2498 | return SDValue(); |
| 2499 | |
| 2500 | // Properly sign extend the value. |
| 2501 | int MaskVal = SignExtend32(Value, ByteSize * 8); |
| 2502 | |
| 2503 | // If this is zero, don't match, zero matches ISD::isBuildVectorAllZeros. |
| 2504 | if (MaskVal == 0) return SDValue(); |
| 2505 | |
| 2506 | // Finally, if this value fits in a 5 bit sext field, return it |
| 2507 | if (SignExtend32<5>(MaskVal) == MaskVal) |
| 2508 | return DAG.getTargetConstant(MaskVal, SDLoc(N), MVT::i32); |
| 2509 | return SDValue(); |
| 2510 | } |
| 2511 | |
| 2512 | //===----------------------------------------------------------------------===// |
| 2513 | // Addressing Mode Selection |
| 2514 | //===----------------------------------------------------------------------===// |
| 2515 | |
| 2516 | /// isIntS16Immediate - This method tests to see if the node is either a 32-bit |
| 2517 | /// or 64-bit immediate, and if the value can be accurately represented as a |
| 2518 | /// sign extension from a 16-bit value. If so, this returns true and the |
| 2519 | /// immediate. |
| 2520 | bool llvm::isIntS16Immediate(SDNode *N, int16_t &Imm) { |
| 2521 | if (!isa<ConstantSDNode>(N)) |
| 2522 | return false; |
| 2523 | |
| 2524 | Imm = (int16_t)cast<ConstantSDNode>(N)->getZExtValue(); |
| 2525 | if (N->getValueType(0) == MVT::i32) |
| 2526 | return Imm == (int32_t)cast<ConstantSDNode>(N)->getZExtValue(); |
| 2527 | else |
| 2528 | return Imm == (int64_t)cast<ConstantSDNode>(N)->getZExtValue(); |
| 2529 | } |
| 2530 | bool llvm::isIntS16Immediate(SDValue Op, int16_t &Imm) { |
| 2531 | return isIntS16Immediate(Op.getNode(), Imm); |
| 2532 | } |
| 2533 | |
| 2534 | /// Used when computing address flags for selecting loads and stores. |
| 2535 | /// If we have an OR, check if the LHS and RHS are provably disjoint. |
| 2536 | /// An OR of two provably disjoint values is equivalent to an ADD. |
| 2537 | /// Most PPC load/store instructions compute the effective address as a sum, |
| 2538 | /// so doing this conversion is useful. |
| 2539 | static bool provablyDisjointOr(SelectionDAG &DAG, const SDValue &N) { |
| 2540 | if (N.getOpcode() != ISD::OR) |
| 2541 | return false; |
| 2542 | KnownBits LHSKnown = DAG.computeKnownBits(N.getOperand(0)); |
| 2543 | if (!LHSKnown.Zero.getBoolValue()) |
| 2544 | return false; |
| 2545 | KnownBits RHSKnown = DAG.computeKnownBits(N.getOperand(1)); |
| 2546 | return (~(LHSKnown.Zero | RHSKnown.Zero) == 0); |
| 2547 | } |
| 2548 | |
| 2549 | /// SelectAddressEVXRegReg - Given the specified address, check to see if it can |
| 2550 | /// be represented as an indexed [r+r] operation. |
| 2551 | bool PPCTargetLowering::SelectAddressEVXRegReg(SDValue N, SDValue &Base, |
| 2552 | SDValue &Index, |
| 2553 | SelectionDAG &DAG) const { |
| 2554 | for (SDNode::use_iterator UI = N->use_begin(), E = N->use_end(); |
| 2555 | UI != E; ++UI) { |
| 2556 | if (MemSDNode *Memop = dyn_cast<MemSDNode>(*UI)) { |
| 2557 | if (Memop->getMemoryVT() == MVT::f64) { |
| 2558 | Base = N.getOperand(0); |
| 2559 | Index = N.getOperand(1); |
| 2560 | return true; |
| 2561 | } |
| 2562 | } |
| 2563 | } |
| 2564 | return false; |
| 2565 | } |
| 2566 | |
| 2567 | /// isIntS34Immediate - This method tests if value of node given can be |
| 2568 | /// accurately represented as a sign extension from a 34-bit value. If so, |
| 2569 | /// this returns true and the immediate. |
| 2570 | bool llvm::isIntS34Immediate(SDNode *N, int64_t &Imm) { |
| 2571 | if (!isa<ConstantSDNode>(N)) |
| 2572 | return false; |
| 2573 | |
| 2574 | Imm = (int64_t)cast<ConstantSDNode>(N)->getZExtValue(); |
| 2575 | return isInt<34>(Imm); |
| 2576 | } |
| 2577 | bool llvm::isIntS34Immediate(SDValue Op, int64_t &Imm) { |
| 2578 | return isIntS34Immediate(Op.getNode(), Imm); |
| 2579 | } |
| 2580 | |
| 2581 | /// SelectAddressRegReg - Given the specified addressed, check to see if it |
| 2582 | /// can be represented as an indexed [r+r] operation. Returns false if it |
| 2583 | /// can be more efficiently represented as [r+imm]. If \p EncodingAlignment is |
| 2584 | /// non-zero and N can be represented by a base register plus a signed 16-bit |
| 2585 | /// displacement, make a more precise judgement by checking (displacement % \p |
| 2586 | /// EncodingAlignment). |
| 2587 | bool PPCTargetLowering::SelectAddressRegReg( |
| 2588 | SDValue N, SDValue &Base, SDValue &Index, SelectionDAG &DAG, |
| 2589 | MaybeAlign EncodingAlignment) const { |
| 2590 | // If we have a PC Relative target flag don't select as [reg+reg]. It will be |
| 2591 | // a [pc+imm]. |
| 2592 | if (SelectAddressPCRel(N, Base)) |
| 2593 | return false; |
| 2594 | |
| 2595 | int16_t Imm = 0; |
| 2596 | if (N.getOpcode() == ISD::ADD) { |
| 2597 | // Is there any SPE load/store (f64), which can't handle 16bit offset? |
| 2598 | // SPE load/store can only handle 8-bit offsets. |
| 2599 | if (hasSPE() && SelectAddressEVXRegReg(N, Base, Index, DAG)) |
| 2600 | return true; |
| 2601 | if (isIntS16Immediate(N.getOperand(1), Imm) && |
| 2602 | (!EncodingAlignment || isAligned(*EncodingAlignment, Imm))) |
| 2603 | return false; // r+i |
| 2604 | if (N.getOperand(1).getOpcode() == PPCISD::Lo) |
| 2605 | return false; // r+i |
| 2606 | |
| 2607 | Base = N.getOperand(0); |
| 2608 | Index = N.getOperand(1); |
| 2609 | return true; |
| 2610 | } else if (N.getOpcode() == ISD::OR) { |
| 2611 | if (isIntS16Immediate(N.getOperand(1), Imm) && |
| 2612 | (!EncodingAlignment || isAligned(*EncodingAlignment, Imm))) |
| 2613 | return false; // r+i can fold it if we can. |
| 2614 | |
| 2615 | // If this is an or of disjoint bitfields, we can codegen this as an add |
| 2616 | // (for better address arithmetic) if the LHS and RHS of the OR are provably |
| 2617 | // disjoint. |
| 2618 | KnownBits LHSKnown = DAG.computeKnownBits(N.getOperand(0)); |
| 2619 | |
| 2620 | if (LHSKnown.Zero.getBoolValue()) { |
| 2621 | KnownBits RHSKnown = DAG.computeKnownBits(N.getOperand(1)); |
| 2622 | // If all of the bits are known zero on the LHS or RHS, the add won't |
| 2623 | // carry. |
| 2624 | if (~(LHSKnown.Zero | RHSKnown.Zero) == 0) { |
| 2625 | Base = N.getOperand(0); |
| 2626 | Index = N.getOperand(1); |
| 2627 | return true; |
| 2628 | } |
| 2629 | } |
| 2630 | } |
| 2631 | |
| 2632 | return false; |
| 2633 | } |
| 2634 | |
| 2635 | // If we happen to be doing an i64 load or store into a stack slot that has |
| 2636 | // less than a 4-byte alignment, then the frame-index elimination may need to |
| 2637 | // use an indexed load or store instruction (because the offset may not be a |
| 2638 | // multiple of 4). The extra register needed to hold the offset comes from the |
| 2639 | // register scavenger, and it is possible that the scavenger will need to use |
| 2640 | // an emergency spill slot. As a result, we need to make sure that a spill slot |
| 2641 | // is allocated when doing an i64 load/store into a less-than-4-byte-aligned |
| 2642 | // stack slot. |
| 2643 | static void fixupFuncForFI(SelectionDAG &DAG, int FrameIdx, EVT VT) { |
| 2644 | // FIXME: This does not handle the LWA case. |
| 2645 | if (VT != MVT::i64) |
| 2646 | return; |
| 2647 | |
| 2648 | // NOTE: We'll exclude negative FIs here, which come from argument |
| 2649 | // lowering, because there are no known test cases triggering this problem |
| 2650 | // using packed structures (or similar). We can remove this exclusion if |
| 2651 | // we find such a test case. The reason why this is so test-case driven is |
| 2652 | // because this entire 'fixup' is only to prevent crashes (from the |
| 2653 | // register scavenger) on not-really-valid inputs. For example, if we have: |
| 2654 | // %a = alloca i1 |
| 2655 | // %b = bitcast i1* %a to i64* |
| 2656 | // store i64* a, i64 b |
| 2657 | // then the store should really be marked as 'align 1', but is not. If it |
| 2658 | // were marked as 'align 1' then the indexed form would have been |
| 2659 | // instruction-selected initially, and the problem this 'fixup' is preventing |
| 2660 | // won't happen regardless. |
| 2661 | if (FrameIdx < 0) |
| 2662 | return; |
| 2663 | |
| 2664 | MachineFunction &MF = DAG.getMachineFunction(); |
| 2665 | MachineFrameInfo &MFI = MF.getFrameInfo(); |
| 2666 | |
| 2667 | if (MFI.getObjectAlign(FrameIdx) >= Align(4)) |
| 2668 | return; |
| 2669 | |
| 2670 | PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>(); |
| 2671 | FuncInfo->setHasNonRISpills(); |
| 2672 | } |
| 2673 | |
| 2674 | /// Returns true if the address N can be represented by a base register plus |
| 2675 | /// a signed 16-bit displacement [r+imm], and if it is not better |
| 2676 | /// represented as reg+reg. If \p EncodingAlignment is non-zero, only accept |
| 2677 | /// displacements that are multiples of that value. |
| 2678 | bool PPCTargetLowering::SelectAddressRegImm( |
| 2679 | SDValue N, SDValue &Disp, SDValue &Base, SelectionDAG &DAG, |
| 2680 | MaybeAlign EncodingAlignment) const { |
| 2681 | // FIXME dl should come from parent load or store, not from address |
| 2682 | SDLoc dl(N); |
| 2683 | |
| 2684 | // If we have a PC Relative target flag don't select as [reg+imm]. It will be |
| 2685 | // a [pc+imm]. |
| 2686 | if (SelectAddressPCRel(N, Base)) |
| 2687 | return false; |
| 2688 | |
| 2689 | // If this can be more profitably realized as r+r, fail. |
| 2690 | if (SelectAddressRegReg(N, Disp, Base, DAG, EncodingAlignment)) |
| 2691 | return false; |
| 2692 | |
| 2693 | if (N.getOpcode() == ISD::ADD) { |
| 2694 | int16_t imm = 0; |
| 2695 | if (isIntS16Immediate(N.getOperand(1), imm) && |
| 2696 | (!EncodingAlignment || isAligned(*EncodingAlignment, imm))) { |
| 2697 | Disp = DAG.getTargetConstant(imm, dl, N.getValueType()); |
| 2698 | if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) { |
| 2699 | Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType()); |
| 2700 | fixupFuncForFI(DAG, FI->getIndex(), N.getValueType()); |
| 2701 | } else { |
| 2702 | Base = N.getOperand(0); |
| 2703 | } |
| 2704 | return true; // [r+i] |
| 2705 | } else if (N.getOperand(1).getOpcode() == PPCISD::Lo) { |
| 2706 | // Match LOAD (ADD (X, Lo(G))). |
| 2707 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2708, __extension__ __PRETTY_FUNCTION__)) |
| 2708 | && "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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2708, __extension__ __PRETTY_FUNCTION__)); |
| 2709 | Disp = N.getOperand(1).getOperand(0); // The global address. |
| 2710 | 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" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2713, __extension__ __PRETTY_FUNCTION__)) |
| 2711 | 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" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2713, __extension__ __PRETTY_FUNCTION__)) |
| 2712 | 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" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2713, __extension__ __PRETTY_FUNCTION__)) |
| 2713 | 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" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 2713, __extension__ __PRETTY_FUNCTION__)); |
| 2714 | Base = N.getOperand(0); |
| 2715 | return true; // [&g+r] |
| 2716 | } |
| 2717 | } else if (N.getOpcode() == ISD::OR) { |
| 2718 | int16_t imm = 0; |
| 2719 | if (isIntS16Immediate(N.getOperand(1), imm) && |
| 2720 | (!EncodingAlignment || isAligned(*EncodingAlignment, imm))) { |
| 2721 | // If this is an or of disjoint bitfields, we can codegen this as an add |
| 2722 | // (for better address arithmetic) if the LHS and RHS of the OR are |
| 2723 | // provably disjoint. |
| 2724 | KnownBits LHSKnown = DAG.computeKnownBits(N.getOperand(0)); |
| 2725 | |
| 2726 | if ((LHSKnown.Zero.getZExtValue()|~(uint64_t)imm) == ~0ULL) { |
| 2727 | // If all of the bits are known zero on the LHS or RHS, the add won't |
| 2728 | // carry. |
| 2729 | if (FrameIndexSDNode *FI = |
| 2730 | dyn_cast<FrameIndexSDNode>(N.getOperand(0))) { |
| 2731 | Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType()); |
| 2732 | fixupFuncForFI(DAG, FI->getIndex(), N.getValueType()); |
| 2733 | } else { |
| 2734 | Base = N.getOperand(0); |
| 2735 | } |
| 2736 | Disp = DAG.getTargetConstant(imm, dl, N.getValueType()); |
| 2737 | return true; |
| 2738 | } |
| 2739 | } |
| 2740 | } else if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) { |
| 2741 | // Loading from a constant address. |
| 2742 | |
| 2743 | // If this address fits entirely in a 16-bit sext immediate field, codegen |
| 2744 | // this as "d, 0" |
| 2745 | int16_t Imm; |
| 2746 | if (isIntS16Immediate(CN, Imm) && |
| 2747 | (!EncodingAlignment || isAligned(*EncodingAlignment, Imm))) { |
| 2748 | Disp = DAG.getTargetConstant(Imm, dl, CN->getValueType(0)); |
| 2749 | Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO, |
| 2750 | CN->getValueType(0)); |
| 2751 | return true; |
| 2752 | } |
| 2753 | |
| 2754 | // Handle 32-bit sext immediates with LIS + addr mode. |
| 2755 | if ((CN->getValueType(0) == MVT::i32 || |
| 2756 | (int64_t)CN->getZExtValue() == (int)CN->getZExtValue()) && |
| 2757 | (!EncodingAlignment || |
| 2758 | isAligned(*EncodingAlignment, CN->getZExtValue()))) { |
| 2759 | int Addr = (int)CN->getZExtValue(); |
| 2760 | |
| 2761 | // Otherwise, break this down into an LIS + disp. |
| 2762 | Disp = DAG.getTargetConstant((short)Addr, dl, MVT::i32); |
| 2763 | |
| 2764 | Base = DAG.getTargetConstant((Addr - (signed short)Addr) >> 16, dl, |
| 2765 | MVT::i32); |
| 2766 | unsigned Opc = CN->getValueType(0) == MVT::i32 ? PPC::LIS : PPC::LIS8; |
| 2767 | Base = SDValue(DAG.getMachineNode(Opc, dl, CN->getValueType(0), Base), 0); |
| 2768 | return true; |
| 2769 | } |
| 2770 | } |
| 2771 | |
| 2772 | Disp = DAG.getTargetConstant(0, dl, getPointerTy(DAG.getDataLayout())); |
| 2773 | if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N)) { |
| 2774 | Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType()); |
| 2775 | fixupFuncForFI(DAG, FI->getIndex(), N.getValueType()); |
| 2776 | } else |
| 2777 | Base = N; |
| 2778 | return true; // [r+0] |
| 2779 | } |
| 2780 | |
| 2781 | /// Similar to the 16-bit case but for instructions that take a 34-bit |
| 2782 | /// displacement field (prefixed loads/stores). |
| 2783 | bool PPCTargetLowering::SelectAddressRegImm34(SDValue N, SDValue &Disp, |
| 2784 | SDValue &Base, |
| 2785 | SelectionDAG &DAG) const { |
| 2786 | // Only on 64-bit targets. |
| 2787 | if (N.getValueType() != MVT::i64) |
| 2788 | return false; |
| 2789 | |
| 2790 | SDLoc dl(N); |
| 2791 | int64_t Imm = 0; |
| 2792 | |
| 2793 | if (N.getOpcode() == ISD::ADD) { |
| 2794 | if (!isIntS34Immediate(N.getOperand(1), Imm)) |
| 2795 | return false; |
| 2796 | Disp = DAG.getTargetConstant(Imm, dl, N.getValueType()); |
| 2797 | if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) |
| 2798 | Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType()); |
| 2799 | else |
| 2800 | Base = N.getOperand(0); |
| 2801 | return true; |
| 2802 | } |
| 2803 | |
| 2804 | if (N.getOpcode() == ISD::OR) { |
| 2805 | if (!isIntS34Immediate(N.getOperand(1), Imm)) |
| 2806 | return false; |
| 2807 | // If this is an or of disjoint bitfields, we can codegen this as an add |
| 2808 | // (for better address arithmetic) if the LHS and RHS of the OR are |
| 2809 | // provably disjoint. |
| 2810 | KnownBits LHSKnown = DAG.computeKnownBits(N.getOperand(0)); |
| 2811 | if ((LHSKnown.Zero.getZExtValue() | ~(uint64_t)Imm) != ~0ULL) |
| 2812 | return false; |
| 2813 | if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) |
| 2814 | Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType()); |
| 2815 | else |
| 2816 | Base = N.getOperand(0); |
| 2817 | Disp = DAG.getTargetConstant(Imm, dl, N.getValueType()); |
| 2818 | return true; |
| 2819 | } |
| 2820 | |
| 2821 | if (isIntS34Immediate(N, Imm)) { // If the address is a 34-bit const. |
| 2822 | Disp = DAG.getTargetConstant(Imm, dl, N.getValueType()); |
| 2823 | Base = DAG.getRegister(PPC::ZERO8, N.getValueType()); |
| 2824 | return true; |
| 2825 | } |
| 2826 | |
| 2827 | return false; |
| 2828 | } |
| 2829 | |
| 2830 | /// SelectAddressRegRegOnly - Given the specified addressed, force it to be |
| 2831 | /// represented as an indexed [r+r] operation. |
| 2832 | bool PPCTargetLowering::SelectAddressRegRegOnly(SDValue N, SDValue &Base, |
| 2833 | SDValue &Index, |
| 2834 | SelectionDAG &DAG) const { |
| 2835 | // Check to see if we can easily represent this as an [r+r] address. This |
| 2836 | // will fail if it thinks that the address is more profitably represented as |
| 2837 | // reg+imm, e.g. where imm = 0. |
| 2838 | if (SelectAddressRegReg(N, Base, Index, DAG)) |
| 2839 | return true; |
| 2840 | |
| 2841 | // If the address is the result of an add, we will utilize the fact that the |
| 2842 | // address calculation includes an implicit add. However, we can reduce |
| 2843 | // register pressure if we do not materialize a constant just for use as the |
| 2844 | // index register. We only get rid of the add if it is not an add of a |
| 2845 | // value and a 16-bit signed constant and both have a single use. |
| 2846 | int16_t imm = 0; |
| 2847 | if (N.getOpcode() == ISD::ADD && |
| 2848 | (!isIntS16Immediate(N.getOperand(1), imm) || |
| 2849 | !N.getOperand(1).hasOneUse() || !N.getOperand(0).hasOneUse())) { |
| 2850 | Base = N.getOperand(0); |
| 2851 | Index = N.getOperand(1); |
| 2852 | return true; |
| 2853 | } |
| 2854 | |
| 2855 | // Otherwise, do it the hard way, using R0 as the base register. |
| 2856 | Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO, |
| 2857 | N.getValueType()); |
| 2858 | Index = N; |
| 2859 | return true; |
| 2860 | } |
| 2861 | |
| 2862 | template <typename Ty> static bool isValidPCRelNode(SDValue N) { |
| 2863 | Ty *PCRelCand = dyn_cast<Ty>(N); |
| 2864 | return PCRelCand && (PCRelCand->getTargetFlags() & PPCII::MO_PCREL_FLAG); |
| 2865 | } |
| 2866 | |
| 2867 | /// Returns true if this address is a PC Relative address. |
| 2868 | /// PC Relative addresses are marked with the flag PPCII::MO_PCREL_FLAG |
| 2869 | /// or if the node opcode is PPCISD::MAT_PCREL_ADDR. |
| 2870 | bool PPCTargetLowering::SelectAddressPCRel(SDValue N, SDValue &Base) const { |
| 2871 | // This is a materialize PC Relative node. Always select this as PC Relative. |
| 2872 | Base = N; |
| 2873 | if (N.getOpcode() == PPCISD::MAT_PCREL_ADDR) |
| 2874 | return true; |
| 2875 | if (isValidPCRelNode<ConstantPoolSDNode>(N) || |
| 2876 | isValidPCRelNode<GlobalAddressSDNode>(N) || |
| 2877 | isValidPCRelNode<JumpTableSDNode>(N) || |
| 2878 | isValidPCRelNode<BlockAddressSDNode>(N)) |
| 2879 | return true; |
| 2880 | return false; |
| 2881 | } |
| 2882 | |
| 2883 | /// Returns true if we should use a direct load into vector instruction |
| 2884 | /// (such as lxsd or lfd), instead of a load into gpr + direct move sequence. |
| 2885 | static bool usePartialVectorLoads(SDNode *N, const PPCSubtarget& ST) { |
| 2886 | |
| 2887 | // If there are any other uses other than scalar to vector, then we should |
| 2888 | // keep it as a scalar load -> direct move pattern to prevent multiple |
| 2889 | // loads. |
| 2890 | LoadSDNode *LD = dyn_cast<LoadSDNode>(N); |
| 2891 | if (!LD) |
| 2892 | return false; |
| 2893 | |
| 2894 | EVT MemVT = LD->getMemoryVT(); |
| 2895 | if (!MemVT.isSimple()) |
| 2896 | return false; |
| 2897 | switch(MemVT.getSimpleVT().SimpleTy) { |
| 2898 | case MVT::i64: |
| 2899 | break; |
| 2900 | case MVT::i32: |
| 2901 | if (!ST.hasP8Vector()) |
| 2902 | return false; |
| 2903 | break; |
| 2904 | case MVT::i16: |
| 2905 | case MVT::i8: |
| 2906 | if (!ST.hasP9Vector()) |
| 2907 | return false; |
| 2908 | break; |
| 2909 | default: |
| 2910 | return false; |
| 2911 | } |
| 2912 | |
| 2913 | SDValue LoadedVal(N, 0); |
| 2914 | if (!LoadedVal.hasOneUse()) |
| 2915 | return false; |
| 2916 | |
| 2917 | for (SDNode::use_iterator UI = LD->use_begin(), UE = LD->use_end(); |
| 2918 | UI != UE; ++UI) |
| 2919 | if (UI.getUse().get().getResNo() == 0 && |
| 2920 | UI->getOpcode() != ISD::SCALAR_TO_VECTOR && |
| 2921 | UI->getOpcode() != PPCISD::SCALAR_TO_VECTOR_PERMUTED) |
| 2922 | return false; |
| 2923 | |
| 2924 | return true; |
| 2925 | } |
| 2926 | |
| 2927 | /// getPreIndexedAddressParts - returns true by value, base pointer and |
| 2928 | /// offset pointer and addressing mode by reference if the node's address |
| 2929 | /// can be legally represented as pre-indexed load / store address. |
| 2930 | bool PPCTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base, |
| 2931 | SDValue &Offset, |
| 2932 | ISD::MemIndexedMode &AM, |
| 2933 | SelectionDAG &DAG) const { |
| 2934 | if (DisablePPCPreinc) return false; |
| 2935 | |
| 2936 | bool isLoad = true; |
| 2937 | SDValue Ptr; |
| 2938 | EVT VT; |
| 2939 | unsigned Alignment; |
| 2940 | if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) { |
| 2941 | Ptr = LD->getBasePtr(); |
| 2942 | VT = LD->getMemoryVT(); |
| 2943 | Alignment = LD->getAlignment(); |
| 2944 | } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) { |
| 2945 | Ptr = ST->getBasePtr(); |
| 2946 | VT = ST->getMemoryVT(); |
| 2947 | Alignment = ST->getAlignment(); |
| 2948 | isLoad = false; |
| 2949 | } else |
| 2950 | return false; |
| 2951 | |
| 2952 | // Do not generate pre-inc forms for specific loads that feed scalar_to_vector |
| 2953 | // instructions because we can fold these into a more efficient instruction |
| 2954 | // instead, (such as LXSD). |
| 2955 | if (isLoad && usePartialVectorLoads(N, Subtarget)) { |
| 2956 | return false; |
| 2957 | } |
| 2958 | |
| 2959 | // PowerPC doesn't have preinc load/store instructions for vectors |
| 2960 | if (VT.isVector()) |
| 2961 | return false; |
| 2962 | |
| 2963 | if (SelectAddressRegReg(Ptr, Base, Offset, DAG)) { |
| 2964 | // Common code will reject creating a pre-inc form if the base pointer |
| 2965 | // is a frame index, or if N is a store and the base pointer is either |
| 2966 | // the same as or a predecessor of the value being stored. Check for |
| 2967 | // those situations here, and try with swapped Base/Offset instead. |
| 2968 | bool Swap = false; |
| 2969 | |
| 2970 | if (isa<FrameIndexSDNode>(Base) || isa<RegisterSDNode>(Base)) |
| 2971 | Swap = true; |
| 2972 | else if (!isLoad) { |
| 2973 | SDValue Val = cast<StoreSDNode>(N)->getValue(); |
| 2974 | if (Val == Base || Base.getNode()->isPredecessorOf(Val.getNode())) |
| 2975 | Swap = true; |
| 2976 | } |
| 2977 | |
| 2978 | if (Swap) |
| 2979 | std::swap(Base, Offset); |
| 2980 | |
| 2981 | AM = ISD::PRE_INC; |
| 2982 | return true; |
| 2983 | } |
| 2984 | |
| 2985 | // LDU/STU can only handle immediates that are a multiple of 4. |
| 2986 | if (VT != MVT::i64) { |
| 2987 | if (!SelectAddressRegImm(Ptr, Offset, Base, DAG, None)) |
| 2988 | return false; |
| 2989 | } else { |
| 2990 | // LDU/STU need an address with at least 4-byte alignment. |
| 2991 | if (Alignment < 4) |
| 2992 | return false; |
| 2993 | |
| 2994 | if (!SelectAddressRegImm(Ptr, Offset, Base, DAG, Align(4))) |
| 2995 | return false; |
| 2996 | } |
| 2997 | |
| 2998 | if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) { |
| 2999 | // PPC64 doesn't have lwau, but it does have lwaux. Reject preinc load of |
| 3000 | // sext i32 to i64 when addr mode is r+i. |
| 3001 | if (LD->getValueType(0) == MVT::i64 && LD->getMemoryVT() == MVT::i32 && |
| 3002 | LD->getExtensionType() == ISD::SEXTLOAD && |
| 3003 | isa<ConstantSDNode>(Offset)) |
| 3004 | return false; |
| 3005 | } |
| 3006 | |
| 3007 | AM = ISD::PRE_INC; |
| 3008 | return true; |
| 3009 | } |
| 3010 | |
| 3011 | //===----------------------------------------------------------------------===// |
| 3012 | // LowerOperation implementation |
| 3013 | //===----------------------------------------------------------------------===// |
| 3014 | |
| 3015 | /// Return true if we should reference labels using a PICBase, set the HiOpFlags |
| 3016 | /// and LoOpFlags to the target MO flags. |
| 3017 | static void getLabelAccessInfo(bool IsPIC, const PPCSubtarget &Subtarget, |
| 3018 | unsigned &HiOpFlags, unsigned &LoOpFlags, |
| 3019 | const GlobalValue *GV = nullptr) { |
| 3020 | HiOpFlags = PPCII::MO_HA; |
| 3021 | LoOpFlags = PPCII::MO_LO; |
| 3022 | |
| 3023 | // Don't use the pic base if not in PIC relocation model. |
| 3024 | if (IsPIC) { |
| 3025 | HiOpFlags |= PPCII::MO_PIC_FLAG; |
| 3026 | LoOpFlags |= PPCII::MO_PIC_FLAG; |
| 3027 | } |
| 3028 | } |
| 3029 | |
| 3030 | static SDValue LowerLabelRef(SDValue HiPart, SDValue LoPart, bool isPIC, |
| 3031 | SelectionDAG &DAG) { |
| 3032 | SDLoc DL(HiPart); |
| 3033 | EVT PtrVT = HiPart.getValueType(); |
| 3034 | SDValue Zero = DAG.getConstant(0, DL, PtrVT); |
| 3035 | |
| 3036 | SDValue Hi = DAG.getNode(PPCISD::Hi, DL, PtrVT, HiPart, Zero); |
| 3037 | SDValue Lo = DAG.getNode(PPCISD::Lo, DL, PtrVT, LoPart, Zero); |
| 3038 | |
| 3039 | // With PIC, the first instruction is actually "GR+hi(&G)". |
| 3040 | if (isPIC) |
| 3041 | Hi = DAG.getNode(ISD::ADD, DL, PtrVT, |
| 3042 | DAG.getNode(PPCISD::GlobalBaseReg, DL, PtrVT), Hi); |
| 3043 | |
| 3044 | // Generate non-pic code that has direct accesses to the constant pool. |
| 3045 | // The address of the global is just (hi(&g)+lo(&g)). |
| 3046 | return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo); |
| 3047 | } |
| 3048 | |
| 3049 | static void setUsesTOCBasePtr(MachineFunction &MF) { |
| 3050 | PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>(); |
| 3051 | FuncInfo->setUsesTOCBasePtr(); |
| 3052 | } |
| 3053 | |
| 3054 | static void setUsesTOCBasePtr(SelectionDAG &DAG) { |
| 3055 | setUsesTOCBasePtr(DAG.getMachineFunction()); |
| 3056 | } |
| 3057 | |
| 3058 | SDValue PPCTargetLowering::getTOCEntry(SelectionDAG &DAG, const SDLoc &dl, |
| 3059 | SDValue GA) const { |
| 3060 | const bool Is64Bit = Subtarget.isPPC64(); |
| 3061 | EVT VT = Is64Bit ? MVT::i64 : MVT::i32; |
| 3062 | SDValue Reg = Is64Bit ? DAG.getRegister(PPC::X2, VT) |
| 3063 | : Subtarget.isAIXABI() |
| 3064 | ? DAG.getRegister(PPC::R2, VT) |
| 3065 | : DAG.getNode(PPCISD::GlobalBaseReg, dl, VT); |
| 3066 | SDValue Ops[] = { GA, Reg }; |
| 3067 | return DAG.getMemIntrinsicNode( |
| 3068 | PPCISD::TOC_ENTRY, dl, DAG.getVTList(VT, MVT::Other), Ops, VT, |
| 3069 | MachinePointerInfo::getGOT(DAG.getMachineFunction()), None, |
| 3070 | MachineMemOperand::MOLoad); |
| 3071 | } |
| 3072 | |
| 3073 | SDValue PPCTargetLowering::LowerConstantPool(SDValue Op, |
| 3074 | SelectionDAG &DAG) const { |
| 3075 | EVT PtrVT = Op.getValueType(); |
| 3076 | ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op); |
| 3077 | const Constant *C = CP->getConstVal(); |
| 3078 | |
| 3079 | // 64-bit SVR4 ABI and AIX ABI code are always position-independent. |
| 3080 | // The actual address of the GlobalValue is stored in the TOC. |
| 3081 | if (Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) { |
| 3082 | if (Subtarget.isUsingPCRelativeCalls()) { |
| 3083 | SDLoc DL(CP); |
| 3084 | EVT Ty = getPointerTy(DAG.getDataLayout()); |
| 3085 | SDValue ConstPool = DAG.getTargetConstantPool( |
| 3086 | C, Ty, CP->getAlign(), CP->getOffset(), PPCII::MO_PCREL_FLAG); |
| 3087 | return DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, ConstPool); |
| 3088 | } |
| 3089 | setUsesTOCBasePtr(DAG); |
| 3090 | SDValue GA = DAG.getTargetConstantPool(C, PtrVT, CP->getAlign(), 0); |
| 3091 | return getTOCEntry(DAG, SDLoc(CP), GA); |
| 3092 | } |
| 3093 | |
| 3094 | unsigned MOHiFlag, MOLoFlag; |
| 3095 | bool IsPIC = isPositionIndependent(); |
| 3096 | getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag); |
| 3097 | |
| 3098 | if (IsPIC && Subtarget.isSVR4ABI()) { |
| 3099 | SDValue GA = |
| 3100 | DAG.getTargetConstantPool(C, PtrVT, CP->getAlign(), PPCII::MO_PIC_FLAG); |
| 3101 | return getTOCEntry(DAG, SDLoc(CP), GA); |
| 3102 | } |
| 3103 | |
| 3104 | SDValue CPIHi = |
| 3105 | DAG.getTargetConstantPool(C, PtrVT, CP->getAlign(), 0, MOHiFlag); |
| 3106 | SDValue CPILo = |
| 3107 | DAG.getTargetConstantPool(C, PtrVT, CP->getAlign(), 0, MOLoFlag); |
| 3108 | return LowerLabelRef(CPIHi, CPILo, IsPIC, DAG); |
| 3109 | } |
| 3110 | |
| 3111 | // For 64-bit PowerPC, prefer the more compact relative encodings. |
| 3112 | // This trades 32 bits per jump table entry for one or two instructions |
| 3113 | // on the jump site. |
| 3114 | unsigned PPCTargetLowering::getJumpTableEncoding() const { |
| 3115 | if (isJumpTableRelative()) |
| 3116 | return MachineJumpTableInfo::EK_LabelDifference32; |
| 3117 | |
| 3118 | return TargetLowering::getJumpTableEncoding(); |
| 3119 | } |
| 3120 | |
| 3121 | bool PPCTargetLowering::isJumpTableRelative() const { |
| 3122 | if (UseAbsoluteJumpTables) |
| 3123 | return false; |
| 3124 | if (Subtarget.isPPC64() || Subtarget.isAIXABI()) |
| 3125 | return true; |
| 3126 | return TargetLowering::isJumpTableRelative(); |
| 3127 | } |
| 3128 | |
| 3129 | SDValue PPCTargetLowering::getPICJumpTableRelocBase(SDValue Table, |
| 3130 | SelectionDAG &DAG) const { |
| 3131 | if (!Subtarget.isPPC64() || Subtarget.isAIXABI()) |
| 3132 | return TargetLowering::getPICJumpTableRelocBase(Table, DAG); |
| 3133 | |
| 3134 | switch (getTargetMachine().getCodeModel()) { |
| 3135 | case CodeModel::Small: |
| 3136 | case CodeModel::Medium: |
| 3137 | return TargetLowering::getPICJumpTableRelocBase(Table, DAG); |
| 3138 | default: |
| 3139 | return DAG.getNode(PPCISD::GlobalBaseReg, SDLoc(), |
| 3140 | getPointerTy(DAG.getDataLayout())); |
| 3141 | } |
| 3142 | } |
| 3143 | |
| 3144 | const MCExpr * |
| 3145 | PPCTargetLowering::getPICJumpTableRelocBaseExpr(const MachineFunction *MF, |
| 3146 | unsigned JTI, |
| 3147 | MCContext &Ctx) const { |
| 3148 | if (!Subtarget.isPPC64() || Subtarget.isAIXABI()) |
| 3149 | return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx); |
| 3150 | |
| 3151 | switch (getTargetMachine().getCodeModel()) { |
| 3152 | case CodeModel::Small: |
| 3153 | case CodeModel::Medium: |
| 3154 | return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx); |
| 3155 | default: |
| 3156 | return MCSymbolRefExpr::create(MF->getPICBaseSymbol(), Ctx); |
| 3157 | } |
| 3158 | } |
| 3159 | |
| 3160 | SDValue PPCTargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const { |
| 3161 | EVT PtrVT = Op.getValueType(); |
| 3162 | JumpTableSDNode *JT = cast<JumpTableSDNode>(Op); |
| 3163 | |
| 3164 | // isUsingPCRelativeCalls() returns true when PCRelative is enabled |
| 3165 | if (Subtarget.isUsingPCRelativeCalls()) { |
| 3166 | SDLoc DL(JT); |
| 3167 | EVT Ty = getPointerTy(DAG.getDataLayout()); |
| 3168 | SDValue GA = |
| 3169 | DAG.getTargetJumpTable(JT->getIndex(), Ty, PPCII::MO_PCREL_FLAG); |
| 3170 | SDValue MatAddr = DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, GA); |
| 3171 | return MatAddr; |
| 3172 | } |
| 3173 | |
| 3174 | // 64-bit SVR4 ABI and AIX ABI code are always position-independent. |
| 3175 | // The actual address of the GlobalValue is stored in the TOC. |
| 3176 | if (Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) { |
| 3177 | setUsesTOCBasePtr(DAG); |
| 3178 | SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT); |
| 3179 | return getTOCEntry(DAG, SDLoc(JT), GA); |
| 3180 | } |
| 3181 | |
| 3182 | unsigned MOHiFlag, MOLoFlag; |
| 3183 | bool IsPIC = isPositionIndependent(); |
| 3184 | getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag); |
| 3185 | |
| 3186 | if (IsPIC && Subtarget.isSVR4ABI()) { |
| 3187 | SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, |
| 3188 | PPCII::MO_PIC_FLAG); |
| 3189 | return getTOCEntry(DAG, SDLoc(GA), GA); |
| 3190 | } |
| 3191 | |
| 3192 | SDValue JTIHi = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOHiFlag); |
| 3193 | SDValue JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOLoFlag); |
| 3194 | return LowerLabelRef(JTIHi, JTILo, IsPIC, DAG); |
| 3195 | } |
| 3196 | |
| 3197 | SDValue PPCTargetLowering::LowerBlockAddress(SDValue Op, |
| 3198 | SelectionDAG &DAG) const { |
| 3199 | EVT PtrVT = Op.getValueType(); |
| 3200 | BlockAddressSDNode *BASDN = cast<BlockAddressSDNode>(Op); |
| 3201 | const BlockAddress *BA = BASDN->getBlockAddress(); |
| 3202 | |
| 3203 | // isUsingPCRelativeCalls() returns true when PCRelative is enabled |
| 3204 | if (Subtarget.isUsingPCRelativeCalls()) { |
| 3205 | SDLoc DL(BASDN); |
| 3206 | EVT Ty = getPointerTy(DAG.getDataLayout()); |
| 3207 | SDValue GA = DAG.getTargetBlockAddress(BA, Ty, BASDN->getOffset(), |
| 3208 | PPCII::MO_PCREL_FLAG); |
| 3209 | SDValue MatAddr = DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, GA); |
| 3210 | return MatAddr; |
| 3211 | } |
| 3212 | |
| 3213 | // 64-bit SVR4 ABI and AIX ABI code are always position-independent. |
| 3214 | // The actual BlockAddress is stored in the TOC. |
| 3215 | if (Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) { |
| 3216 | setUsesTOCBasePtr(DAG); |
| 3217 | SDValue GA = DAG.getTargetBlockAddress(BA, PtrVT, BASDN->getOffset()); |
| 3218 | return getTOCEntry(DAG, SDLoc(BASDN), GA); |
| 3219 | } |
| 3220 | |
| 3221 | // 32-bit position-independent ELF stores the BlockAddress in the .got. |
| 3222 | if (Subtarget.is32BitELFABI() && isPositionIndependent()) |
| 3223 | return getTOCEntry( |
| 3224 | DAG, SDLoc(BASDN), |
| 3225 | DAG.getTargetBlockAddress(BA, PtrVT, BASDN->getOffset())); |
| 3226 | |
| 3227 | unsigned MOHiFlag, MOLoFlag; |
| 3228 | bool IsPIC = isPositionIndependent(); |
| 3229 | getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag); |
| 3230 | SDValue TgtBAHi = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOHiFlag); |
| 3231 | SDValue TgtBALo = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOLoFlag); |
| 3232 | return LowerLabelRef(TgtBAHi, TgtBALo, IsPIC, DAG); |
| 3233 | } |
| 3234 | |
| 3235 | SDValue PPCTargetLowering::LowerGlobalTLSAddress(SDValue Op, |
| 3236 | SelectionDAG &DAG) const { |
| 3237 | if (Subtarget.isAIXABI()) |
| 3238 | return LowerGlobalTLSAddressAIX(Op, DAG); |
| 3239 | |
| 3240 | return LowerGlobalTLSAddressLinux(Op, DAG); |
| 3241 | } |
| 3242 | |
| 3243 | SDValue PPCTargetLowering::LowerGlobalTLSAddressAIX(SDValue Op, |
| 3244 | SelectionDAG &DAG) const { |
| 3245 | GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op); |
| 3246 | |
| 3247 | if (DAG.getTarget().useEmulatedTLS()) |
| 3248 | report_fatal_error("Emulated TLS is not yet supported on AIX"); |
| 3249 | |
| 3250 | SDLoc dl(GA); |
| 3251 | const GlobalValue *GV = GA->getGlobal(); |
| 3252 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); |
| 3253 | |
| 3254 | // The general-dynamic model is the only access model supported for now, so |
| 3255 | // all the GlobalTLSAddress nodes are lowered with this model. |
| 3256 | // We need to generate two TOC entries, one for the variable offset, one for |
| 3257 | // the region handle. The global address for the TOC entry of the region |
| 3258 | // handle is created with the MO_TLSGDM_FLAG flag and the global address |
| 3259 | // for the TOC entry of the variable offset is created with MO_TLSGD_FLAG. |
| 3260 | SDValue VariableOffsetTGA = |
| 3261 | DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, PPCII::MO_TLSGD_FLAG); |
| 3262 | SDValue RegionHandleTGA = |
| 3263 | DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, PPCII::MO_TLSGDM_FLAG); |
| 3264 | SDValue VariableOffset = getTOCEntry(DAG, dl, VariableOffsetTGA); |
| 3265 | SDValue RegionHandle = getTOCEntry(DAG, dl, RegionHandleTGA); |
| 3266 | return DAG.getNode(PPCISD::TLSGD_AIX, dl, PtrVT, VariableOffset, |
| 3267 | RegionHandle); |
| 3268 | } |
| 3269 | |
| 3270 | SDValue PPCTargetLowering::LowerGlobalTLSAddressLinux(SDValue Op, |
| 3271 | SelectionDAG &DAG) const { |
| 3272 | // FIXME: TLS addresses currently use medium model code sequences, |
| 3273 | // which is the most useful form. Eventually support for small and |
| 3274 | // large models could be added if users need it, at the cost of |
| 3275 | // additional complexity. |
| 3276 | GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op); |
| 3277 | if (DAG.getTarget().useEmulatedTLS()) |
| 3278 | return LowerToTLSEmulatedModel(GA, DAG); |
| 3279 | |
| 3280 | SDLoc dl(GA); |
| 3281 | const GlobalValue *GV = GA->getGlobal(); |
| 3282 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); |
| 3283 | bool is64bit = Subtarget.isPPC64(); |
| 3284 | const Module *M = DAG.getMachineFunction().getFunction().getParent(); |
| 3285 | PICLevel::Level picLevel = M->getPICLevel(); |
| 3286 | |
| 3287 | const TargetMachine &TM = getTargetMachine(); |
| 3288 | TLSModel::Model Model = TM.getTLSModel(GV); |
| 3289 | |
| 3290 | if (Model == TLSModel::LocalExec) { |
| 3291 | if (Subtarget.isUsingPCRelativeCalls()) { |
| 3292 | SDValue TLSReg = DAG.getRegister(PPC::X13, MVT::i64); |
| 3293 | SDValue TGA = DAG.getTargetGlobalAddress( |
| 3294 | GV, dl, PtrVT, 0, (PPCII::MO_PCREL_FLAG | PPCII::MO_TPREL_FLAG)); |
| 3295 | SDValue MatAddr = |
| 3296 | DAG.getNode(PPCISD::TLS_LOCAL_EXEC_MAT_ADDR, dl, PtrVT, TGA); |
| 3297 | return DAG.getNode(PPCISD::ADD_TLS, dl, PtrVT, TLSReg, MatAddr); |
| 3298 | } |
| 3299 | |
| 3300 | SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, |
| 3301 | PPCII::MO_TPREL_HA); |
| 3302 | SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, |
| 3303 | PPCII::MO_TPREL_LO); |
| 3304 | SDValue TLSReg = is64bit ? DAG.getRegister(PPC::X13, MVT::i64) |
| 3305 | : DAG.getRegister(PPC::R2, MVT::i32); |
| 3306 | |
| 3307 | SDValue Hi = DAG.getNode(PPCISD::Hi, dl, PtrVT, TGAHi, TLSReg); |
| 3308 | return DAG.getNode(PPCISD::Lo, dl, PtrVT, TGALo, Hi); |
| 3309 | } |
| 3310 | |
| 3311 | if (Model == TLSModel::InitialExec) { |
| 3312 | bool IsPCRel = Subtarget.isUsingPCRelativeCalls(); |
| 3313 | SDValue TGA = DAG.getTargetGlobalAddress( |
| 3314 | GV, dl, PtrVT, 0, IsPCRel ? PPCII::MO_GOT_TPREL_PCREL_FLAG : 0); |
| 3315 | SDValue TGATLS = DAG.getTargetGlobalAddress( |
| 3316 | GV, dl, PtrVT, 0, |
| 3317 | IsPCRel ? (PPCII::MO_TLS | PPCII::MO_PCREL_FLAG) : PPCII::MO_TLS); |
| 3318 | SDValue TPOffset; |
| 3319 | if (IsPCRel) { |
| 3320 | SDValue MatPCRel = DAG.getNode(PPCISD::MAT_PCREL_ADDR, dl, PtrVT, TGA); |
| 3321 | TPOffset = DAG.getLoad(MVT::i64, dl, DAG.getEntryNode(), MatPCRel, |
| 3322 | MachinePointerInfo()); |
| 3323 | } else { |
| 3324 | SDValue GOTPtr; |
| 3325 | if (is64bit) { |
| 3326 | setUsesTOCBasePtr(DAG); |
| 3327 | SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64); |
| 3328 | GOTPtr = |
| 3329 | DAG.getNode(PPCISD::ADDIS_GOT_TPREL_HA, dl, PtrVT, GOTReg, TGA); |
| 3330 | } else { |
| 3331 | if (!TM.isPositionIndependent()) |
| 3332 | GOTPtr = DAG.getNode(PPCISD::PPC32_GOT, dl, PtrVT); |
| 3333 | else if (picLevel == PICLevel::SmallPIC) |
| 3334 | GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT); |
| 3335 | else |
| 3336 | GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT); |
| 3337 | } |
| 3338 | TPOffset = DAG.getNode(PPCISD::LD_GOT_TPREL_L, dl, PtrVT, TGA, GOTPtr); |
| 3339 | } |
| 3340 | return DAG.getNode(PPCISD::ADD_TLS, dl, PtrVT, TPOffset, TGATLS); |
| 3341 | } |
| 3342 | |
| 3343 | if (Model == TLSModel::GeneralDynamic) { |
| 3344 | if (Subtarget.isUsingPCRelativeCalls()) { |
| 3345 | SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, |
| 3346 | PPCII::MO_GOT_TLSGD_PCREL_FLAG); |
| 3347 | return DAG.getNode(PPCISD::TLS_DYNAMIC_MAT_PCREL_ADDR, dl, PtrVT, TGA); |
| 3348 | } |
| 3349 | |
| 3350 | SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, 0); |
| 3351 | SDValue GOTPtr; |
| 3352 | if (is64bit) { |
| 3353 | setUsesTOCBasePtr(DAG); |
| 3354 | SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64); |
| 3355 | GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSGD_HA, dl, PtrVT, |
| 3356 | GOTReg, TGA); |
| 3357 | } else { |
| 3358 | if (picLevel == PICLevel::SmallPIC) |
| 3359 | GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT); |
| 3360 | else |
| 3361 | GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT); |
| 3362 | } |
| 3363 | return DAG.getNode(PPCISD::ADDI_TLSGD_L_ADDR, dl, PtrVT, |
| 3364 | GOTPtr, TGA, TGA); |
| 3365 | } |
| 3366 | |
| 3367 | if (Model == TLSModel::LocalDynamic) { |
| 3368 | if (Subtarget.isUsingPCRelativeCalls()) { |
| 3369 | SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, |
| 3370 | PPCII::MO_GOT_TLSLD_PCREL_FLAG); |
| 3371 | SDValue MatPCRel = |
| 3372 | DAG.getNode(PPCISD::TLS_DYNAMIC_MAT_PCREL_ADDR, dl, PtrVT, TGA); |
| 3373 | return DAG.getNode(PPCISD::PADDI_DTPREL, dl, PtrVT, MatPCRel, TGA); |
| 3374 | } |
| 3375 | |
| 3376 | SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, 0); |
| 3377 | SDValue GOTPtr; |
| 3378 | if (is64bit) { |
| 3379 | setUsesTOCBasePtr(DAG); |
| 3380 | SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64); |
| 3381 | GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSLD_HA, dl, PtrVT, |
| 3382 | GOTReg, TGA); |
| 3383 | } else { |
| 3384 | if (picLevel == PICLevel::SmallPIC) |
| 3385 | GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT); |
| 3386 | else |
| 3387 | GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT); |
| 3388 | } |
| 3389 | SDValue TLSAddr = DAG.getNode(PPCISD::ADDI_TLSLD_L_ADDR, dl, |
| 3390 | PtrVT, GOTPtr, TGA, TGA); |
| 3391 | SDValue DtvOffsetHi = DAG.getNode(PPCISD::ADDIS_DTPREL_HA, dl, |
| 3392 | PtrVT, TLSAddr, TGA); |
| 3393 | return DAG.getNode(PPCISD::ADDI_DTPREL_L, dl, PtrVT, DtvOffsetHi, TGA); |
| 3394 | } |
| 3395 | |
| 3396 | llvm_unreachable("Unknown TLS model!")::llvm::llvm_unreachable_internal("Unknown TLS model!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3396); |
| 3397 | } |
| 3398 | |
| 3399 | SDValue PPCTargetLowering::LowerGlobalAddress(SDValue Op, |
| 3400 | SelectionDAG &DAG) const { |
| 3401 | EVT PtrVT = Op.getValueType(); |
| 3402 | GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op); |
| 3403 | SDLoc DL(GSDN); |
| 3404 | const GlobalValue *GV = GSDN->getGlobal(); |
| 3405 | |
| 3406 | // 64-bit SVR4 ABI & AIX ABI code is always position-independent. |
| 3407 | // The actual address of the GlobalValue is stored in the TOC. |
| 3408 | if (Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) { |
| 3409 | if (Subtarget.isUsingPCRelativeCalls()) { |
| 3410 | EVT Ty = getPointerTy(DAG.getDataLayout()); |
| 3411 | if (isAccessedAsGotIndirect(Op)) { |
| 3412 | SDValue GA = DAG.getTargetGlobalAddress(GV, DL, Ty, GSDN->getOffset(), |
| 3413 | PPCII::MO_PCREL_FLAG | |
| 3414 | PPCII::MO_GOT_FLAG); |
| 3415 | SDValue MatPCRel = DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, GA); |
| 3416 | SDValue Load = DAG.getLoad(MVT::i64, DL, DAG.getEntryNode(), MatPCRel, |
| 3417 | MachinePointerInfo()); |
| 3418 | return Load; |
| 3419 | } else { |
| 3420 | SDValue GA = DAG.getTargetGlobalAddress(GV, DL, Ty, GSDN->getOffset(), |
| 3421 | PPCII::MO_PCREL_FLAG); |
| 3422 | return DAG.getNode(PPCISD::MAT_PCREL_ADDR, DL, Ty, GA); |
| 3423 | } |
| 3424 | } |
| 3425 | setUsesTOCBasePtr(DAG); |
| 3426 | SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset()); |
| 3427 | return getTOCEntry(DAG, DL, GA); |
| 3428 | } |
| 3429 | |
| 3430 | unsigned MOHiFlag, MOLoFlag; |
| 3431 | bool IsPIC = isPositionIndependent(); |
| 3432 | getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag, GV); |
| 3433 | |
| 3434 | if (IsPIC && Subtarget.isSVR4ABI()) { |
| 3435 | SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, |
| 3436 | GSDN->getOffset(), |
| 3437 | PPCII::MO_PIC_FLAG); |
| 3438 | return getTOCEntry(DAG, DL, GA); |
| 3439 | } |
| 3440 | |
| 3441 | SDValue GAHi = |
| 3442 | DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOHiFlag); |
| 3443 | SDValue GALo = |
| 3444 | DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOLoFlag); |
| 3445 | |
| 3446 | return LowerLabelRef(GAHi, GALo, IsPIC, DAG); |
| 3447 | } |
| 3448 | |
| 3449 | SDValue PPCTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const { |
| 3450 | bool IsStrict = Op->isStrictFPOpcode(); |
| 3451 | ISD::CondCode CC = |
| 3452 | cast<CondCodeSDNode>(Op.getOperand(IsStrict ? 3 : 2))->get(); |
| 3453 | SDValue LHS = Op.getOperand(IsStrict ? 1 : 0); |
| 3454 | SDValue RHS = Op.getOperand(IsStrict ? 2 : 1); |
| 3455 | SDValue Chain = IsStrict ? Op.getOperand(0) : SDValue(); |
| 3456 | EVT LHSVT = LHS.getValueType(); |
| 3457 | SDLoc dl(Op); |
| 3458 | |
| 3459 | // Soften the setcc with libcall if it is fp128. |
| 3460 | if (LHSVT == MVT::f128) { |
| 3461 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3462, __extension__ __PRETTY_FUNCTION__)) |
| 3462 | "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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3462, __extension__ __PRETTY_FUNCTION__)); |
| 3463 | softenSetCCOperands(DAG, LHSVT, LHS, RHS, CC, dl, LHS, RHS, Chain, |
| 3464 | Op->getOpcode() == ISD::STRICT_FSETCCS); |
| 3465 | if (RHS.getNode()) |
| 3466 | LHS = DAG.getNode(ISD::SETCC, dl, Op.getValueType(), LHS, RHS, |
| 3467 | DAG.getCondCode(CC)); |
| 3468 | if (IsStrict) |
| 3469 | return DAG.getMergeValues({LHS, Chain}, dl); |
| 3470 | return LHS; |
| 3471 | } |
| 3472 | |
| 3473 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3473, __extension__ __PRETTY_FUNCTION__)); |
| 3474 | |
| 3475 | if (Op.getValueType() == MVT::v2i64) { |
| 3476 | // When the operands themselves are v2i64 values, we need to do something |
| 3477 | // special because VSX has no underlying comparison operations for these. |
| 3478 | if (LHS.getValueType() == MVT::v2i64) { |
| 3479 | // Equality can be handled by casting to the legal type for Altivec |
| 3480 | // comparisons, everything else needs to be expanded. |
| 3481 | if (CC == ISD::SETEQ || CC == ISD::SETNE) { |
| 3482 | return DAG.getNode( |
| 3483 | ISD::BITCAST, dl, MVT::v2i64, |
| 3484 | DAG.getSetCC(dl, MVT::v4i32, |
| 3485 | DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, LHS), |
| 3486 | DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, RHS), CC)); |
| 3487 | } |
| 3488 | |
| 3489 | return SDValue(); |
| 3490 | } |
| 3491 | |
| 3492 | // We handle most of these in the usual way. |
| 3493 | return Op; |
| 3494 | } |
| 3495 | |
| 3496 | // If we're comparing for equality to zero, expose the fact that this is |
| 3497 | // implemented as a ctlz/srl pair on ppc, so that the dag combiner can |
| 3498 | // fold the new nodes. |
| 3499 | if (SDValue V = lowerCmpEqZeroToCtlzSrl(Op, DAG)) |
| 3500 | return V; |
| 3501 | |
| 3502 | if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(RHS)) { |
| 3503 | // Leave comparisons against 0 and -1 alone for now, since they're usually |
| 3504 | // optimized. FIXME: revisit this when we can custom lower all setcc |
| 3505 | // optimizations. |
| 3506 | if (C->isAllOnesValue() || C->isNullValue()) |
| 3507 | return SDValue(); |
| 3508 | } |
| 3509 | |
| 3510 | // If we have an integer seteq/setne, turn it into a compare against zero |
| 3511 | // by xor'ing the rhs with the lhs, which is faster than setting a |
| 3512 | // condition register, reading it back out, and masking the correct bit. The |
| 3513 | // normal approach here uses sub to do this instead of xor. Using xor exposes |
| 3514 | // the result to other bit-twiddling opportunities. |
| 3515 | if (LHSVT.isInteger() && (CC == ISD::SETEQ || CC == ISD::SETNE)) { |
| 3516 | EVT VT = Op.getValueType(); |
| 3517 | SDValue Sub = DAG.getNode(ISD::XOR, dl, LHSVT, LHS, RHS); |
| 3518 | return DAG.getSetCC(dl, VT, Sub, DAG.getConstant(0, dl, LHSVT), CC); |
| 3519 | } |
| 3520 | return SDValue(); |
| 3521 | } |
| 3522 | |
| 3523 | SDValue PPCTargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const { |
| 3524 | SDNode *Node = Op.getNode(); |
| 3525 | EVT VT = Node->getValueType(0); |
| 3526 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); |
| 3527 | SDValue InChain = Node->getOperand(0); |
| 3528 | SDValue VAListPtr = Node->getOperand(1); |
| 3529 | const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue(); |
| 3530 | SDLoc dl(Node); |
| 3531 | |
| 3532 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3532, __extension__ __PRETTY_FUNCTION__)); |
| 3533 | |
| 3534 | // gpr_index |
| 3535 | SDValue GprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain, |
| 3536 | VAListPtr, MachinePointerInfo(SV), MVT::i8); |
| 3537 | InChain = GprIndex.getValue(1); |
| 3538 | |
| 3539 | if (VT == MVT::i64) { |
| 3540 | // Check if GprIndex is even |
| 3541 | SDValue GprAnd = DAG.getNode(ISD::AND, dl, MVT::i32, GprIndex, |
| 3542 | DAG.getConstant(1, dl, MVT::i32)); |
| 3543 | SDValue CC64 = DAG.getSetCC(dl, MVT::i32, GprAnd, |
| 3544 | DAG.getConstant(0, dl, MVT::i32), ISD::SETNE); |
| 3545 | SDValue GprIndexPlusOne = DAG.getNode(ISD::ADD, dl, MVT::i32, GprIndex, |
| 3546 | DAG.getConstant(1, dl, MVT::i32)); |
| 3547 | // Align GprIndex to be even if it isn't |
| 3548 | GprIndex = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC64, GprIndexPlusOne, |
| 3549 | GprIndex); |
| 3550 | } |
| 3551 | |
| 3552 | // fpr index is 1 byte after gpr |
| 3553 | SDValue FprPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr, |
| 3554 | DAG.getConstant(1, dl, MVT::i32)); |
| 3555 | |
| 3556 | // fpr |
| 3557 | SDValue FprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain, |
| 3558 | FprPtr, MachinePointerInfo(SV), MVT::i8); |
| 3559 | InChain = FprIndex.getValue(1); |
| 3560 | |
| 3561 | SDValue RegSaveAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr, |
| 3562 | DAG.getConstant(8, dl, MVT::i32)); |
| 3563 | |
| 3564 | SDValue OverflowAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr, |
| 3565 | DAG.getConstant(4, dl, MVT::i32)); |
| 3566 | |
| 3567 | // areas |
| 3568 | SDValue OverflowArea = |
| 3569 | DAG.getLoad(MVT::i32, dl, InChain, OverflowAreaPtr, MachinePointerInfo()); |
| 3570 | InChain = OverflowArea.getValue(1); |
| 3571 | |
| 3572 | SDValue RegSaveArea = |
| 3573 | DAG.getLoad(MVT::i32, dl, InChain, RegSaveAreaPtr, MachinePointerInfo()); |
| 3574 | InChain = RegSaveArea.getValue(1); |
| 3575 | |
| 3576 | // select overflow_area if index > 8 |
| 3577 | SDValue CC = DAG.getSetCC(dl, MVT::i32, VT.isInteger() ? GprIndex : FprIndex, |
| 3578 | DAG.getConstant(8, dl, MVT::i32), ISD::SETLT); |
| 3579 | |
| 3580 | // adjustment constant gpr_index * 4/8 |
| 3581 | SDValue RegConstant = DAG.getNode(ISD::MUL, dl, MVT::i32, |
| 3582 | VT.isInteger() ? GprIndex : FprIndex, |
| 3583 | DAG.getConstant(VT.isInteger() ? 4 : 8, dl, |
| 3584 | MVT::i32)); |
| 3585 | |
| 3586 | // OurReg = RegSaveArea + RegConstant |
| 3587 | SDValue OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, RegSaveArea, |
| 3588 | RegConstant); |
| 3589 | |
| 3590 | // Floating types are 32 bytes into RegSaveArea |
| 3591 | if (VT.isFloatingPoint()) |
| 3592 | OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, OurReg, |
| 3593 | DAG.getConstant(32, dl, MVT::i32)); |
| 3594 | |
| 3595 | // increase {f,g}pr_index by 1 (or 2 if VT is i64) |
| 3596 | SDValue IndexPlus1 = DAG.getNode(ISD::ADD, dl, MVT::i32, |
| 3597 | VT.isInteger() ? GprIndex : FprIndex, |
| 3598 | DAG.getConstant(VT == MVT::i64 ? 2 : 1, dl, |
| 3599 | MVT::i32)); |
| 3600 | |
| 3601 | InChain = DAG.getTruncStore(InChain, dl, IndexPlus1, |
| 3602 | VT.isInteger() ? VAListPtr : FprPtr, |
| 3603 | MachinePointerInfo(SV), MVT::i8); |
| 3604 | |
| 3605 | // determine if we should load from reg_save_area or overflow_area |
| 3606 | SDValue Result = DAG.getNode(ISD::SELECT, dl, PtrVT, CC, OurReg, OverflowArea); |
| 3607 | |
| 3608 | // increase overflow_area by 4/8 if gpr/fpr > 8 |
| 3609 | SDValue OverflowAreaPlusN = DAG.getNode(ISD::ADD, dl, PtrVT, OverflowArea, |
| 3610 | DAG.getConstant(VT.isInteger() ? 4 : 8, |
| 3611 | dl, MVT::i32)); |
| 3612 | |
| 3613 | OverflowArea = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC, OverflowArea, |
| 3614 | OverflowAreaPlusN); |
| 3615 | |
| 3616 | InChain = DAG.getTruncStore(InChain, dl, OverflowArea, OverflowAreaPtr, |
| 3617 | MachinePointerInfo(), MVT::i32); |
| 3618 | |
| 3619 | return DAG.getLoad(VT, dl, InChain, Result, MachinePointerInfo()); |
| 3620 | } |
| 3621 | |
| 3622 | SDValue PPCTargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const { |
| 3623 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3623, __extension__ __PRETTY_FUNCTION__)); |
| 3624 | |
| 3625 | // We have to copy the entire va_list struct: |
| 3626 | // 2*sizeof(char) + 2 Byte alignment + 2*sizeof(char*) = 12 Byte |
| 3627 | return DAG.getMemcpy(Op.getOperand(0), Op, Op.getOperand(1), Op.getOperand(2), |
| 3628 | DAG.getConstant(12, SDLoc(Op), MVT::i32), Align(8), |
| 3629 | false, true, false, MachinePointerInfo(), |
| 3630 | MachinePointerInfo()); |
| 3631 | } |
| 3632 | |
| 3633 | SDValue PPCTargetLowering::LowerADJUST_TRAMPOLINE(SDValue Op, |
| 3634 | SelectionDAG &DAG) const { |
| 3635 | if (Subtarget.isAIXABI()) |
| 3636 | report_fatal_error("ADJUST_TRAMPOLINE operation is not supported on AIX."); |
| 3637 | |
| 3638 | return Op.getOperand(0); |
| 3639 | } |
| 3640 | |
| 3641 | SDValue PPCTargetLowering::LowerINLINEASM(SDValue Op, SelectionDAG &DAG) const { |
| 3642 | MachineFunction &MF = DAG.getMachineFunction(); |
| 3643 | PPCFunctionInfo &MFI = *MF.getInfo<PPCFunctionInfo>(); |
| 3644 | |
| 3645 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3647, __extension__ __PRETTY_FUNCTION__)) |
| 3646 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3647, __extension__ __PRETTY_FUNCTION__)) |
| 3647 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3647, __extension__ __PRETTY_FUNCTION__)); |
| 3648 | |
| 3649 | // If an LR store is already known to be required then there is not point in |
| 3650 | // checking this ASM as well. |
| 3651 | if (MFI.isLRStoreRequired()) |
| 3652 | return Op; |
| 3653 | |
| 3654 | // Inline ASM nodes have an optional last operand that is an incoming Flag of |
| 3655 | // type MVT::Glue. We want to ignore this last operand if that is the case. |
| 3656 | unsigned NumOps = Op.getNumOperands(); |
| 3657 | if (Op.getOperand(NumOps - 1).getValueType() == MVT::Glue) |
| 3658 | --NumOps; |
| 3659 | |
| 3660 | // Check all operands that may contain the LR. |
| 3661 | for (unsigned i = InlineAsm::Op_FirstOperand; i != NumOps;) { |
| 3662 | unsigned Flags = cast<ConstantSDNode>(Op.getOperand(i))->getZExtValue(); |
| 3663 | unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags); |
| 3664 | ++i; // Skip the ID value. |
| 3665 | |
| 3666 | switch (InlineAsm::getKind(Flags)) { |
| 3667 | default: |
| 3668 | llvm_unreachable("Bad flags!")::llvm::llvm_unreachable_internal("Bad flags!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3668); |
| 3669 | case InlineAsm::Kind_RegUse: |
| 3670 | case InlineAsm::Kind_Imm: |
| 3671 | case InlineAsm::Kind_Mem: |
| 3672 | i += NumVals; |
| 3673 | break; |
| 3674 | case InlineAsm::Kind_Clobber: |
| 3675 | case InlineAsm::Kind_RegDef: |
| 3676 | case InlineAsm::Kind_RegDefEarlyClobber: { |
| 3677 | for (; NumVals; --NumVals, ++i) { |
| 3678 | Register Reg = cast<RegisterSDNode>(Op.getOperand(i))->getReg(); |
| 3679 | if (Reg != PPC::LR && Reg != PPC::LR8) |
| 3680 | continue; |
| 3681 | MFI.setLRStoreRequired(); |
| 3682 | return Op; |
| 3683 | } |
| 3684 | break; |
| 3685 | } |
| 3686 | } |
| 3687 | } |
| 3688 | |
| 3689 | return Op; |
| 3690 | } |
| 3691 | |
| 3692 | SDValue PPCTargetLowering::LowerINIT_TRAMPOLINE(SDValue Op, |
| 3693 | SelectionDAG &DAG) const { |
| 3694 | if (Subtarget.isAIXABI()) |
| 3695 | report_fatal_error("INIT_TRAMPOLINE operation is not supported on AIX."); |
| 3696 | |
| 3697 | SDValue Chain = Op.getOperand(0); |
| 3698 | SDValue Trmp = Op.getOperand(1); // trampoline |
| 3699 | SDValue FPtr = Op.getOperand(2); // nested function |
| 3700 | SDValue Nest = Op.getOperand(3); // 'nest' parameter value |
| 3701 | SDLoc dl(Op); |
| 3702 | |
| 3703 | EVT PtrVT = getPointerTy(DAG.getDataLayout()); |
| 3704 | bool isPPC64 = (PtrVT == MVT::i64); |
| 3705 | Type *IntPtrTy = DAG.getDataLayout().getIntPtrType(*DAG.getContext()); |
| 3706 | |
| 3707 | TargetLowering::ArgListTy Args; |
| 3708 | TargetLowering::ArgListEntry Entry; |
| 3709 | |
| 3710 | Entry.Ty = IntPtrTy; |
| 3711 | Entry.Node = Trmp; Args.push_back(Entry); |
| 3712 | |
| 3713 | // TrampSize == (isPPC64 ? 48 : 40); |
| 3714 | Entry.Node = DAG.getConstant(isPPC64 ? 48 : 40, dl, |
| 3715 | isPPC64 ? MVT::i64 : MVT::i32); |
| 3716 | Args.push_back(Entry); |
| 3717 | |
| 3718 | Entry.Node = FPtr; Args.push_back(Entry); |
| 3719 | Entry.Node = Nest; Args.push_back(Entry); |
| 3720 | |
| 3721 | // Lower to a call to __trampoline_setup(Trmp, TrampSize, FPtr, ctx_reg) |
| 3722 | TargetLowering::CallLoweringInfo CLI(DAG); |
| 3723 | CLI.setDebugLoc(dl).setChain(Chain).setLibCallee( |
| 3724 | CallingConv::C, Type::getVoidTy(*DAG.getContext()), |
| 3725 | DAG.getExternalSymbol("__trampoline_setup", PtrVT), std::move(Args)); |
| 3726 | |
| 3727 | std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI); |
| 3728 | return CallResult.second; |
| 3729 | } |
| 3730 | |
| 3731 | SDValue PPCTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const { |
| 3732 | MachineFunction &MF = DAG.getMachineFunction(); |
| 3733 | PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>(); |
| 3734 | EVT PtrVT = getPointerTy(MF.getDataLayout()); |
| 3735 | |
| 3736 | SDLoc dl(Op); |
| 3737 | |
| 3738 | if (Subtarget.isPPC64() || Subtarget.isAIXABI()) { |
| 3739 | // vastart just stores the address of the VarArgsFrameIndex slot into the |
| 3740 | // memory location argument. |
| 3741 | SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT); |
| 3742 | const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue(); |
| 3743 | return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1), |
| 3744 | MachinePointerInfo(SV)); |
| 3745 | } |
| 3746 | |
| 3747 | // For the 32-bit SVR4 ABI we follow the layout of the va_list struct. |
| 3748 | // We suppose the given va_list is already allocated. |
| 3749 | // |
| 3750 | // typedef struct { |
| 3751 | // char gpr; /* index into the array of 8 GPRs |
| 3752 | // * stored in the register save area |
| 3753 | // * gpr=0 corresponds to r3, |
| 3754 | // * gpr=1 to r4, etc. |
| 3755 | // */ |
| 3756 | // char fpr; /* index into the array of 8 FPRs |
| 3757 | // * stored in the register save area |
| 3758 | // * fpr=0 corresponds to f1, |
| 3759 | // * fpr=1 to f2, etc. |
| 3760 | // */ |
| 3761 | // char *overflow_arg_area; |
| 3762 | // /* location on stack that holds |
| 3763 | // * the next overflow argument |
| 3764 | // */ |
| 3765 | // char *reg_save_area; |
| 3766 | // /* where r3:r10 and f1:f8 (if saved) |
| 3767 | // * are stored |
| 3768 | // */ |
| 3769 | // } va_list[1]; |
| 3770 | |
| 3771 | SDValue ArgGPR = DAG.getConstant(FuncInfo->getVarArgsNumGPR(), dl, MVT::i32); |
| 3772 | SDValue ArgFPR = DAG.getConstant(FuncInfo->getVarArgsNumFPR(), dl, MVT::i32); |
| 3773 | SDValue StackOffsetFI = DAG.getFrameIndex(FuncInfo->getVarArgsStackOffset(), |
| 3774 | PtrVT); |
| 3775 | SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), |
| 3776 | PtrVT); |
| 3777 | |
| 3778 | uint64_t FrameOffset = PtrVT.getSizeInBits()/8; |
| 3779 | SDValue ConstFrameOffset = DAG.getConstant(FrameOffset, dl, PtrVT); |
| 3780 | |
| 3781 | uint64_t StackOffset = PtrVT.getSizeInBits()/8 - 1; |
| 3782 | SDValue ConstStackOffset = DAG.getConstant(StackOffset, dl, PtrVT); |
| 3783 | |
| 3784 | uint64_t FPROffset = 1; |
| 3785 | SDValue ConstFPROffset = DAG.getConstant(FPROffset, dl, PtrVT); |
| 3786 | |
| 3787 | const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue(); |
| 3788 | |
| 3789 | // Store first byte : number of int regs |
| 3790 | SDValue firstStore = |
| 3791 | DAG.getTruncStore(Op.getOperand(0), dl, ArgGPR, Op.getOperand(1), |
| 3792 | MachinePointerInfo(SV), MVT::i8); |
| 3793 | uint64_t nextOffset = FPROffset; |
| 3794 | SDValue nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, Op.getOperand(1), |
| 3795 | ConstFPROffset); |
| 3796 | |
| 3797 | // Store second byte : number of float regs |
| 3798 | SDValue secondStore = |
| 3799 | DAG.getTruncStore(firstStore, dl, ArgFPR, nextPtr, |
| 3800 | MachinePointerInfo(SV, nextOffset), MVT::i8); |
| 3801 | nextOffset += StackOffset; |
| 3802 | nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstStackOffset); |
| 3803 | |
| 3804 | // Store second word : arguments given on stack |
| 3805 | SDValue thirdStore = DAG.getStore(secondStore, dl, StackOffsetFI, nextPtr, |
| 3806 | MachinePointerInfo(SV, nextOffset)); |
| 3807 | nextOffset += FrameOffset; |
| 3808 | nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstFrameOffset); |
| 3809 | |
| 3810 | // Store third word : arguments given in registers |
| 3811 | return DAG.getStore(thirdStore, dl, FR, nextPtr, |
| 3812 | MachinePointerInfo(SV, nextOffset)); |
| 3813 | } |
| 3814 | |
| 3815 | /// FPR - The set of FP registers that should be allocated for arguments |
| 3816 | /// on Darwin and AIX. |
| 3817 | static const MCPhysReg FPR[] = {PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, |
| 3818 | PPC::F6, PPC::F7, PPC::F8, PPC::F9, PPC::F10, |
| 3819 | PPC::F11, PPC::F12, PPC::F13}; |
| 3820 | |
| 3821 | /// CalculateStackSlotSize - Calculates the size reserved for this argument on |
| 3822 | /// the stack. |
| 3823 | static unsigned CalculateStackSlotSize(EVT ArgVT, ISD::ArgFlagsTy Flags, |
| 3824 | unsigned PtrByteSize) { |
| 3825 | unsigned ArgSize = ArgVT.getStoreSize(); |
| 3826 | if (Flags.isByVal()) |
| 3827 | ArgSize = Flags.getByValSize(); |
| 3828 | |
| 3829 | // Round up to multiples of the pointer size, except for array members, |
| 3830 | // which are always packed. |
| 3831 | if (!Flags.isInConsecutiveRegs()) |
| 3832 | ArgSize = ((ArgSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize; |
| 3833 | |
| 3834 | return ArgSize; |
| 3835 | } |
| 3836 | |
| 3837 | /// CalculateStackSlotAlignment - Calculates the alignment of this argument |
| 3838 | /// on the stack. |
| 3839 | static Align CalculateStackSlotAlignment(EVT ArgVT, EVT OrigVT, |
| 3840 | ISD::ArgFlagsTy Flags, |
| 3841 | unsigned PtrByteSize) { |
| 3842 | Align Alignment(PtrByteSize); |
| 3843 | |
| 3844 | // Altivec parameters are padded to a 16 byte boundary. |
| 3845 | if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 || |
| 3846 | ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 || |
| 3847 | ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64 || |
| 3848 | ArgVT == MVT::v1i128 || ArgVT == MVT::f128) |
| 3849 | Alignment = Align(16); |
| 3850 | |
| 3851 | // ByVal parameters are aligned as requested. |
| 3852 | if (Flags.isByVal()) { |
| 3853 | auto BVAlign = Flags.getNonZeroByValAlign(); |
| 3854 | if (BVAlign > PtrByteSize) { |
| 3855 | if (BVAlign.value() % PtrByteSize != 0) |
| 3856 | llvm_unreachable(::llvm::llvm_unreachable_internal("ByVal alignment is not a multiple of the pointer size" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3857) |
| 3857 | "ByVal alignment is not a multiple of the pointer size")::llvm::llvm_unreachable_internal("ByVal alignment is not a multiple of the pointer size" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3857); |
| 3858 | |
| 3859 | Alignment = BVAlign; |
| 3860 | } |
| 3861 | } |
| 3862 | |
| 3863 | // Array members are always packed to their original alignment. |
| 3864 | if (Flags.isInConsecutiveRegs()) { |
| 3865 | // If the array member was split into multiple registers, the first |
| 3866 | // needs to be aligned to the size of the full type. (Except for |
| 3867 | // ppcf128, which is only aligned as its f64 components.) |
| 3868 | if (Flags.isSplit() && OrigVT != MVT::ppcf128) |
| 3869 | Alignment = Align(OrigVT.getStoreSize()); |
| 3870 | else |
| 3871 | Alignment = Align(ArgVT.getStoreSize()); |
| 3872 | } |
| 3873 | |
| 3874 | return Alignment; |
| 3875 | } |
| 3876 | |
| 3877 | /// CalculateStackSlotUsed - Return whether this argument will use its |
| 3878 | /// stack slot (instead of being passed in registers). ArgOffset, |
| 3879 | /// AvailableFPRs, and AvailableVRs must hold the current argument |
| 3880 | /// position, and will be updated to account for this argument. |
| 3881 | static bool CalculateStackSlotUsed(EVT ArgVT, EVT OrigVT, ISD::ArgFlagsTy Flags, |
| 3882 | unsigned PtrByteSize, unsigned LinkageSize, |
| 3883 | unsigned ParamAreaSize, unsigned &ArgOffset, |
| 3884 | unsigned &AvailableFPRs, |
| 3885 | unsigned &AvailableVRs) { |
| 3886 | bool UseMemory = false; |
| 3887 | |
| 3888 | // Respect alignment of argument on the stack. |
| 3889 | Align Alignment = |
| 3890 | CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize); |
| 3891 | ArgOffset = alignTo(ArgOffset, Alignment); |
| 3892 | // If there's no space left in the argument save area, we must |
| 3893 | // use memory (this check also catches zero-sized arguments). |
| 3894 | if (ArgOffset >= LinkageSize + ParamAreaSize) |
| 3895 | UseMemory = true; |
| 3896 | |
| 3897 | // Allocate argument on the stack. |
| 3898 | ArgOffset += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize); |
| 3899 | if (Flags.isInConsecutiveRegsLast()) |
| 3900 | ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize; |
| 3901 | // If we overran the argument save area, we must use memory |
| 3902 | // (this check catches arguments passed partially in memory) |
| 3903 | if (ArgOffset > LinkageSize + ParamAreaSize) |
| 3904 | UseMemory = true; |
| 3905 | |
| 3906 | // However, if the argument is actually passed in an FPR or a VR, |
| 3907 | // we don't use memory after all. |
| 3908 | if (!Flags.isByVal()) { |
| 3909 | if (ArgVT == MVT::f32 || ArgVT == MVT::f64) |
| 3910 | if (AvailableFPRs > 0) { |
| 3911 | --AvailableFPRs; |
| 3912 | return false; |
| 3913 | } |
| 3914 | if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 || |
| 3915 | ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 || |
| 3916 | ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64 || |
| 3917 | ArgVT == MVT::v1i128 || ArgVT == MVT::f128) |
| 3918 | if (AvailableVRs > 0) { |
| 3919 | --AvailableVRs; |
| 3920 | return false; |
| 3921 | } |
| 3922 | } |
| 3923 | |
| 3924 | return UseMemory; |
| 3925 | } |
| 3926 | |
| 3927 | /// EnsureStackAlignment - Round stack frame size up from NumBytes to |
| 3928 | /// ensure minimum alignment required for target. |
| 3929 | static unsigned EnsureStackAlignment(const PPCFrameLowering *Lowering, |
| 3930 | unsigned NumBytes) { |
| 3931 | return alignTo(NumBytes, Lowering->getStackAlign()); |
| 3932 | } |
| 3933 | |
| 3934 | SDValue PPCTargetLowering::LowerFormalArguments( |
| 3935 | SDValue Chain, CallingConv::ID CallConv, bool isVarArg, |
| 3936 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, |
| 3937 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const { |
| 3938 | if (Subtarget.isAIXABI()) |
| 3939 | return LowerFormalArguments_AIX(Chain, CallConv, isVarArg, Ins, dl, DAG, |
| 3940 | InVals); |
| 3941 | if (Subtarget.is64BitELFABI()) |
| 3942 | return LowerFormalArguments_64SVR4(Chain, CallConv, isVarArg, Ins, dl, DAG, |
| 3943 | InVals); |
| 3944 | assert(Subtarget.is32BitELFABI())(static_cast <bool> (Subtarget.is32BitELFABI()) ? void ( 0) : __assert_fail ("Subtarget.is32BitELFABI()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 3944, __extension__ __PRETTY_FUNCTION__)); |
| 3945 | return LowerFormalArguments_32SVR4(Chain, CallConv, isVarArg, Ins, dl, DAG, |
| 3946 | InVals); |
| 3947 | } |
| 3948 | |
| 3949 | SDValue PPCTargetLowering::LowerFormalArguments_32SVR4( |
| 3950 | SDValue Chain, CallingConv::ID CallConv, bool isVarArg, |
| 3951 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, |
| 3952 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const { |
| 3953 | |
| 3954 | // 32-bit SVR4 ABI Stack Frame Layout: |
| 3955 | // +-----------------------------------+ |
| 3956 | // +--> | Back chain | |
| 3957 | // | +-----------------------------------+ |
| 3958 | // | | Floating-point register save area | |
| 3959 | // | +-----------------------------------+ |
| 3960 | // | | General register save area | |
| 3961 | // | +-----------------------------------+ |
| 3962 | // | | CR save word | |
| 3963 | // | +-----------------------------------+ |
| 3964 | // | | VRSAVE save word | |
| 3965 | // | +-----------------------------------+ |
| 3966 | // | | Alignment padding | |
| 3967 | // | +-----------------------------------+ |
| 3968 | // | | Vector register save area | |
| 3969 | // | +-----------------------------------+ |
| 3970 | // | | Local variable space | |
| 3971 | // | +-----------------------------------+ |
| 3972 | // | | Parameter list area | |
| 3973 | // | +-----------------------------------+ |
| 3974 | // | | LR save word | |
| 3975 | // | +-----------------------------------+ |
| 3976 | // SP--> +--- | Back chain | |
| 3977 | // +-----------------------------------+ |
| 3978 | // |
| 3979 | // Specifications: |
| 3980 | // System V Application Binary Interface PowerPC Processor Supplement |
| 3981 | // AltiVec Technology Programming Interface Manual |
| 3982 | |
| 3983 | MachineFunction &MF = DAG.getMachineFunction(); |
| 3984 | MachineFrameInfo &MFI = MF.getFrameInfo(); |
| 3985 | PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>(); |
| 3986 | |
| 3987 | EVT PtrVT = getPointerTy(MF.getDataLayout()); |
| 3988 | // Potential tail calls could cause overwriting of argument stack slots. |
| 3989 | bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt && |
| 3990 | (CallConv == CallingConv::Fast)); |
| 3991 | const Align PtrAlign(4); |
| 3992 | |
| 3993 | // Assign locations to all of the incoming arguments. |
| 3994 | SmallVector<CCValAssign, 16> ArgLocs; |
| 3995 | PPCCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs, |
| 3996 | *DAG.getContext()); |
| 3997 | |
| 3998 | // Reserve space for the linkage area on the stack. |
| 3999 | unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize(); |
| 4000 | CCInfo.AllocateStack(LinkageSize, PtrAlign); |
| 4001 | if (useSoftFloat()) |
| 4002 | CCInfo.PreAnalyzeFormalArguments(Ins); |
| 4003 | |
| 4004 | CCInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4); |
| 4005 | CCInfo.clearWasPPCF128(); |
| 4006 | |
| 4007 | for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) { |
| 4008 | CCValAssign &VA = ArgLocs[i]; |
| 4009 | |
| 4010 | // Arguments stored in registers. |
| 4011 | if (VA.isRegLoc()) { |
| 4012 | const TargetRegisterClass *RC; |
| 4013 | EVT ValVT = VA.getValVT(); |
| 4014 | |
| 4015 | switch (ValVT.getSimpleVT().SimpleTy) { |
| 4016 | default: |
| 4017 | llvm_unreachable("ValVT not supported by formal arguments Lowering")::llvm::llvm_unreachable_internal("ValVT not supported by formal arguments Lowering" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4017); |
| 4018 | case MVT::i1: |
| 4019 | case MVT::i32: |
| 4020 | RC = &PPC::GPRCRegClass; |
| 4021 | break; |
| 4022 | case MVT::f32: |
| 4023 | if (Subtarget.hasP8Vector()) |
| 4024 | RC = &PPC::VSSRCRegClass; |
| 4025 | else if (Subtarget.hasSPE()) |
| 4026 | RC = &PPC::GPRCRegClass; |
| 4027 | else |
| 4028 | RC = &PPC::F4RCRegClass; |
| 4029 | break; |
| 4030 | case MVT::f64: |
| 4031 | if (Subtarget.hasVSX()) |
| 4032 | RC = &PPC::VSFRCRegClass; |
| 4033 | else if (Subtarget.hasSPE()) |
| 4034 | // SPE passes doubles in GPR pairs. |
| 4035 | RC = &PPC::GPRCRegClass; |
| 4036 | else |
| 4037 | RC = &PPC::F8RCRegClass; |
| 4038 | break; |
| 4039 | case MVT::v16i8: |
| 4040 | case MVT::v8i16: |
| 4041 | case MVT::v4i32: |
| 4042 | RC = &PPC::VRRCRegClass; |
| 4043 | break; |
| 4044 | case MVT::v4f32: |
| 4045 | RC = &PPC::VRRCRegClass; |
| 4046 | break; |
| 4047 | case MVT::v2f64: |
| 4048 | case MVT::v2i64: |
| 4049 | RC = &PPC::VRRCRegClass; |
| 4050 | break; |
| 4051 | } |
| 4052 | |
| 4053 | SDValue ArgValue; |
| 4054 | // Transform the arguments stored in physical registers into |
| 4055 | // virtual ones. |
| 4056 | if (VA.getLocVT() == MVT::f64 && Subtarget.hasSPE()) { |
| 4057 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4057, __extension__ __PRETTY_FUNCTION__)); |
| 4058 | unsigned RegLo = MF.addLiveIn(VA.getLocReg(), RC); |
| 4059 | unsigned RegHi = MF.addLiveIn(ArgLocs[++i].getLocReg(), RC); |
| 4060 | SDValue ArgValueLo = DAG.getCopyFromReg(Chain, dl, RegLo, MVT::i32); |
| 4061 | SDValue ArgValueHi = DAG.getCopyFromReg(Chain, dl, RegHi, MVT::i32); |
| 4062 | if (!Subtarget.isLittleEndian()) |
| 4063 | std::swap (ArgValueLo, ArgValueHi); |
| 4064 | ArgValue = DAG.getNode(PPCISD::BUILD_SPE64, dl, MVT::f64, ArgValueLo, |
| 4065 | ArgValueHi); |
| 4066 | } else { |
| 4067 | unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC); |
| 4068 | ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, |
| 4069 | ValVT == MVT::i1 ? MVT::i32 : ValVT); |
| 4070 | if (ValVT == MVT::i1) |
| 4071 | ArgValue = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, ArgValue); |
| 4072 | } |
| 4073 | |
| 4074 | InVals.push_back(ArgValue); |
| 4075 | } else { |
| 4076 | // Argument stored in memory. |
| 4077 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4077, __extension__ __PRETTY_FUNCTION__)); |
| 4078 | |
| 4079 | // Get the extended size of the argument type in stack |
| 4080 | unsigned ArgSize = VA.getLocVT().getStoreSize(); |
| 4081 | // Get the actual size of the argument type |
| 4082 | unsigned ObjSize = VA.getValVT().getStoreSize(); |
| 4083 | unsigned ArgOffset = VA.getLocMemOffset(); |
| 4084 | // Stack objects in PPC32 are right justified. |
| 4085 | ArgOffset += ArgSize - ObjSize; |
| 4086 | int FI = MFI.CreateFixedObject(ArgSize, ArgOffset, isImmutable); |
| 4087 | |
| 4088 | // Create load nodes to retrieve arguments from the stack. |
| 4089 | SDValue FIN = DAG.getFrameIndex(FI, PtrVT); |
| 4090 | InVals.push_back( |
| 4091 | DAG.getLoad(VA.getValVT(), dl, Chain, FIN, MachinePointerInfo())); |
| 4092 | } |
| 4093 | } |
| 4094 | |
| 4095 | // Assign locations to all of the incoming aggregate by value arguments. |
| 4096 | // Aggregates passed by value are stored in the local variable space of the |
| 4097 | // caller's stack frame, right above the parameter list area. |
| 4098 | SmallVector<CCValAssign, 16> ByValArgLocs; |
| 4099 | CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(), |
| 4100 | ByValArgLocs, *DAG.getContext()); |
| 4101 | |
| 4102 | // Reserve stack space for the allocations in CCInfo. |
| 4103 | CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrAlign); |
| 4104 | |
| 4105 | CCByValInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4_ByVal); |
| 4106 | |
| 4107 | // Area that is at least reserved in the caller of this function. |
| 4108 | unsigned MinReservedArea = CCByValInfo.getNextStackOffset(); |
| 4109 | MinReservedArea = std::max(MinReservedArea, LinkageSize); |
| 4110 | |
| 4111 | // Set the size that is at least reserved in caller of this function. Tail |
| 4112 | // call optimized function's reserved stack space needs to be aligned so that |
| 4113 | // taking the difference between two stack areas will result in an aligned |
| 4114 | // stack. |
| 4115 | MinReservedArea = |
| 4116 | EnsureStackAlignment(Subtarget.getFrameLowering(), MinReservedArea); |
| 4117 | FuncInfo->setMinReservedArea(MinReservedArea); |
| 4118 | |
| 4119 | SmallVector<SDValue, 8> MemOps; |
| 4120 | |
| 4121 | // If the function takes variable number of arguments, make a frame index for |
| 4122 | // the start of the first vararg value... for expansion of llvm.va_start. |
| 4123 | if (isVarArg) { |
| 4124 | static const MCPhysReg GPArgRegs[] = { |
| 4125 | PPC::R3, PPC::R4, PPC::R5, PPC::R6, |
| 4126 | PPC::R7, PPC::R8, PPC::R9, PPC::R10, |
| 4127 | }; |
| 4128 | const unsigned NumGPArgRegs = array_lengthof(GPArgRegs); |
| 4129 | |
| 4130 | static const MCPhysReg FPArgRegs[] = { |
| 4131 | PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7, |
| 4132 | PPC::F8 |
| 4133 | }; |
| 4134 | unsigned NumFPArgRegs = array_lengthof(FPArgRegs); |
| 4135 | |
| 4136 | if (useSoftFloat() || hasSPE()) |
| 4137 | NumFPArgRegs = 0; |
| 4138 | |
| 4139 | FuncInfo->setVarArgsNumGPR(CCInfo.getFirstUnallocated(GPArgRegs)); |
| 4140 | FuncInfo->setVarArgsNumFPR(CCInfo.getFirstUnallocated(FPArgRegs)); |
| 4141 | |
| 4142 | // Make room for NumGPArgRegs and NumFPArgRegs. |
| 4143 | int Depth = NumGPArgRegs * PtrVT.getSizeInBits()/8 + |
| 4144 | NumFPArgRegs * MVT(MVT::f64).getSizeInBits()/8; |
| 4145 | |
| 4146 | FuncInfo->setVarArgsStackOffset( |
| 4147 | MFI.CreateFixedObject(PtrVT.getSizeInBits()/8, |
| 4148 | CCInfo.getNextStackOffset(), true)); |
| 4149 | |
| 4150 | FuncInfo->setVarArgsFrameIndex( |
| 4151 | MFI.CreateStackObject(Depth, Align(8), false)); |
| 4152 | SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT); |
| 4153 | |
| 4154 | // The fixed integer arguments of a variadic function are stored to the |
| 4155 | // VarArgsFrameIndex on the stack so that they may be loaded by |
| 4156 | // dereferencing the result of va_next. |
| 4157 | for (unsigned GPRIndex = 0; GPRIndex != NumGPArgRegs; ++GPRIndex) { |
| 4158 | // Get an existing live-in vreg, or add a new one. |
| 4159 | unsigned VReg = MF.getRegInfo().getLiveInVirtReg(GPArgRegs[GPRIndex]); |
| 4160 | if (!VReg) |
| 4161 | VReg = MF.addLiveIn(GPArgRegs[GPRIndex], &PPC::GPRCRegClass); |
| 4162 | |
| 4163 | SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT); |
| 4164 | SDValue Store = |
| 4165 | DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo()); |
| 4166 | MemOps.push_back(Store); |
| 4167 | // Increment the address by four for the next argument to store |
| 4168 | SDValue PtrOff = DAG.getConstant(PtrVT.getSizeInBits()/8, dl, PtrVT); |
| 4169 | FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff); |
| 4170 | } |
| 4171 | |
| 4172 | // FIXME 32-bit SVR4: We only need to save FP argument registers if CR bit 6 |
| 4173 | // is set. |
| 4174 | // The double arguments are stored to the VarArgsFrameIndex |
| 4175 | // on the stack. |
| 4176 | for (unsigned FPRIndex = 0; FPRIndex != NumFPArgRegs; ++FPRIndex) { |
| 4177 | // Get an existing live-in vreg, or add a new one. |
| 4178 | unsigned VReg = MF.getRegInfo().getLiveInVirtReg(FPArgRegs[FPRIndex]); |
| 4179 | if (!VReg) |
| 4180 | VReg = MF.addLiveIn(FPArgRegs[FPRIndex], &PPC::F8RCRegClass); |
| 4181 | |
| 4182 | SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::f64); |
| 4183 | SDValue Store = |
| 4184 | DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo()); |
| 4185 | MemOps.push_back(Store); |
| 4186 | // Increment the address by eight for the next argument to store |
| 4187 | SDValue PtrOff = DAG.getConstant(MVT(MVT::f64).getSizeInBits()/8, dl, |
| 4188 | PtrVT); |
| 4189 | FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff); |
| 4190 | } |
| 4191 | } |
| 4192 | |
| 4193 | if (!MemOps.empty()) |
| 4194 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps); |
| 4195 | |
| 4196 | return Chain; |
| 4197 | } |
| 4198 | |
| 4199 | // PPC64 passes i8, i16, and i32 values in i64 registers. Promote |
| 4200 | // value to MVT::i64 and then truncate to the correct register size. |
| 4201 | SDValue PPCTargetLowering::extendArgForPPC64(ISD::ArgFlagsTy Flags, |
| 4202 | EVT ObjectVT, SelectionDAG &DAG, |
| 4203 | SDValue ArgVal, |
| 4204 | const SDLoc &dl) const { |
| 4205 | if (Flags.isSExt()) |
| 4206 | ArgVal = DAG.getNode(ISD::AssertSext, dl, MVT::i64, ArgVal, |
| 4207 | DAG.getValueType(ObjectVT)); |
| 4208 | else if (Flags.isZExt()) |
| 4209 | ArgVal = DAG.getNode(ISD::AssertZext, dl, MVT::i64, ArgVal, |
| 4210 | DAG.getValueType(ObjectVT)); |
| 4211 | |
| 4212 | return DAG.getNode(ISD::TRUNCATE, dl, ObjectVT, ArgVal); |
| 4213 | } |
| 4214 | |
| 4215 | SDValue PPCTargetLowering::LowerFormalArguments_64SVR4( |
| 4216 | SDValue Chain, CallingConv::ID CallConv, bool isVarArg, |
| 4217 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, |
| 4218 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const { |
| 4219 | // TODO: add description of PPC stack frame format, or at least some docs. |
| 4220 | // |
| 4221 | bool isELFv2ABI = Subtarget.isELFv2ABI(); |
| 4222 | bool isLittleEndian = Subtarget.isLittleEndian(); |
| 4223 | MachineFunction &MF = DAG.getMachineFunction(); |
| 4224 | MachineFrameInfo &MFI = MF.getFrameInfo(); |
| 4225 | PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>(); |
| 4226 | |
| 4227 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4228, __extension__ __PRETTY_FUNCTION__)) |
| 4228 | "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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4228, __extension__ __PRETTY_FUNCTION__)); |
| 4229 | |
| 4230 | EVT PtrVT = getPointerTy(MF.getDataLayout()); |
| 4231 | // Potential tail calls could cause overwriting of argument stack slots. |
| 4232 | bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt && |
| 4233 | (CallConv == CallingConv::Fast)); |
| 4234 | unsigned PtrByteSize = 8; |
| 4235 | unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize(); |
| 4236 | |
| 4237 | static const MCPhysReg GPR[] = { |
| 4238 | PPC::X3, PPC::X4, PPC::X5, PPC::X6, |
| 4239 | PPC::X7, PPC::X8, PPC::X9, PPC::X10, |
| 4240 | }; |
| 4241 | static const MCPhysReg VR[] = { |
| 4242 | PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8, |
| 4243 | PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13 |
| 4244 | }; |
| 4245 | |
| 4246 | const unsigned Num_GPR_Regs = array_lengthof(GPR); |
| 4247 | const unsigned Num_FPR_Regs = useSoftFloat() ? 0 : 13; |
| 4248 | const unsigned Num_VR_Regs = array_lengthof(VR); |
| 4249 | |
| 4250 | // Do a first pass over the arguments to determine whether the ABI |
| 4251 | // guarantees that our caller has allocated the parameter save area |
| 4252 | // on its stack frame. In the ELFv1 ABI, this is always the case; |
| 4253 | // in the ELFv2 ABI, it is true if this is a vararg function or if |
| 4254 | // any parameter is located in a stack slot. |
| 4255 | |
| 4256 | bool HasParameterArea = !isELFv2ABI || isVarArg; |
| 4257 | unsigned ParamAreaSize = Num_GPR_Regs * PtrByteSize; |
| 4258 | unsigned NumBytes = LinkageSize; |
| 4259 | unsigned AvailableFPRs = Num_FPR_Regs; |
| 4260 | unsigned AvailableVRs = Num_VR_Regs; |
| 4261 | for (unsigned i = 0, e = Ins.size(); i != e; ++i) { |
| 4262 | if (Ins[i].Flags.isNest()) |
| 4263 | continue; |
| 4264 | |
| 4265 | if (CalculateStackSlotUsed(Ins[i].VT, Ins[i].ArgVT, Ins[i].Flags, |
| 4266 | PtrByteSize, LinkageSize, ParamAreaSize, |
| 4267 | NumBytes, AvailableFPRs, AvailableVRs)) |
| 4268 | HasParameterArea = true; |
| 4269 | } |
| 4270 | |
| 4271 | // Add DAG nodes to load the arguments or copy them out of registers. On |
| 4272 | // entry to a function on PPC, the arguments start after the linkage area, |
| 4273 | // although the first ones are often in registers. |
| 4274 | |
| 4275 | unsigned ArgOffset = LinkageSize; |
| 4276 | unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0; |
| 4277 | SmallVector<SDValue, 8> MemOps; |
| 4278 | Function::const_arg_iterator FuncArg = MF.getFunction().arg_begin(); |
| 4279 | unsigned CurArgIdx = 0; |
| 4280 | for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo) { |
| 4281 | SDValue ArgVal; |
| 4282 | bool needsLoad = false; |
| 4283 | EVT ObjectVT = Ins[ArgNo].VT; |
| 4284 | EVT OrigVT = Ins[ArgNo].ArgVT; |
| 4285 | unsigned ObjSize = ObjectVT.getStoreSize(); |
| 4286 | unsigned ArgSize = ObjSize; |
| 4287 | ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags; |
| 4288 | if (Ins[ArgNo].isOrigArg()) { |
| 4289 | std::advance(FuncArg, Ins[ArgNo].getOrigArgIndex() - CurArgIdx); |
| 4290 | CurArgIdx = Ins[ArgNo].getOrigArgIndex(); |
| 4291 | } |
| 4292 | // We re-align the argument offset for each argument, except when using the |
| 4293 | // fast calling convention, when we need to make sure we do that only when |
| 4294 | // we'll actually use a stack slot. |
| 4295 | unsigned CurArgOffset; |
| 4296 | Align Alignment; |
| 4297 | auto ComputeArgOffset = [&]() { |
| 4298 | /* Respect alignment of argument on the stack. */ |
| 4299 | Alignment = |
| 4300 | CalculateStackSlotAlignment(ObjectVT, OrigVT, Flags, PtrByteSize); |
| 4301 | ArgOffset = alignTo(ArgOffset, Alignment); |
| 4302 | CurArgOffset = ArgOffset; |
| 4303 | }; |
| 4304 | |
| 4305 | if (CallConv != CallingConv::Fast) { |
| 4306 | ComputeArgOffset(); |
| 4307 | |
| 4308 | /* Compute GPR index associated with argument offset. */ |
| 4309 | GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize; |
| 4310 | GPR_idx = std::min(GPR_idx, Num_GPR_Regs); |
| 4311 | } |
| 4312 | |
| 4313 | // FIXME the codegen can be much improved in some cases. |
| 4314 | // We do not have to keep everything in memory. |
| 4315 | if (Flags.isByVal()) { |
| 4316 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4316, __extension__ __PRETTY_FUNCTION__)); |
| 4317 | |
| 4318 | if (CallConv == CallingConv::Fast) |
| 4319 | ComputeArgOffset(); |
| 4320 | |
| 4321 | // ObjSize is the true size, ArgSize rounded up to multiple of registers. |
| 4322 | ObjSize = Flags.getByValSize(); |
| 4323 | ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize; |
| 4324 | // Empty aggregate parameters do not take up registers. Examples: |
| 4325 | // struct { } a; |
| 4326 | // union { } b; |
| 4327 | // int c[0]; |
| 4328 | // etc. However, we have to provide a place-holder in InVals, so |
| 4329 | // pretend we have an 8-byte item at the current address for that |
| 4330 | // purpose. |
| 4331 | if (!ObjSize) { |
| 4332 | int FI = MFI.CreateFixedObject(PtrByteSize, ArgOffset, true); |
| 4333 | SDValue FIN = DAG.getFrameIndex(FI, PtrVT); |
| 4334 | InVals.push_back(FIN); |
| 4335 | continue; |
| 4336 | } |
| 4337 | |
| 4338 | // Create a stack object covering all stack doublewords occupied |
| 4339 | // by the argument. If the argument is (fully or partially) on |
| 4340 | // the stack, or if the argument is fully in registers but the |
| 4341 | // caller has allocated the parameter save anyway, we can refer |
| 4342 | // directly to the caller's stack frame. Otherwise, create a |
| 4343 | // local copy in our own frame. |
| 4344 | int FI; |
| 4345 | if (HasParameterArea || |
| 4346 | ArgSize + ArgOffset > LinkageSize + Num_GPR_Regs * PtrByteSize) |
| 4347 | FI = MFI.CreateFixedObject(ArgSize, ArgOffset, false, true); |
| 4348 | else |
| 4349 | FI = MFI.CreateStackObject(ArgSize, Alignment, false); |
| 4350 | SDValue FIN = DAG.getFrameIndex(FI, PtrVT); |
| 4351 | |
| 4352 | // Handle aggregates smaller than 8 bytes. |
| 4353 | if (ObjSize < PtrByteSize) { |
| 4354 | // The value of the object is its address, which differs from the |
| 4355 | // address of the enclosing doubleword on big-endian systems. |
| 4356 | SDValue Arg = FIN; |
| 4357 | if (!isLittleEndian) { |
| 4358 | SDValue ArgOff = DAG.getConstant(PtrByteSize - ObjSize, dl, PtrVT); |
| 4359 | Arg = DAG.getNode(ISD::ADD, dl, ArgOff.getValueType(), Arg, ArgOff); |
| 4360 | } |
| 4361 | InVals.push_back(Arg); |
| 4362 | |
| 4363 | if (GPR_idx != Num_GPR_Regs) { |
| 4364 | unsigned VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass); |
| 4365 | FuncInfo->addLiveInAttr(VReg, Flags); |
| 4366 | SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT); |
| 4367 | SDValue Store; |
| 4368 | |
| 4369 | if (ObjSize==1 || ObjSize==2 || ObjSize==4) { |
| 4370 | EVT ObjType = (ObjSize == 1 ? MVT::i8 : |
| 4371 | (ObjSize == 2 ? MVT::i16 : MVT::i32)); |
| 4372 | Store = DAG.getTruncStore(Val.getValue(1), dl, Val, Arg, |
| 4373 | MachinePointerInfo(&*FuncArg), ObjType); |
| 4374 | } else { |
| 4375 | // For sizes that don't fit a truncating store (3, 5, 6, 7), |
| 4376 | // store the whole register as-is to the parameter save area |
| 4377 | // slot. |
| 4378 | Store = DAG.getStore(Val.getValue(1), dl, Val, FIN, |
| 4379 | MachinePointerInfo(&*FuncArg)); |
| 4380 | } |
| 4381 | |
| 4382 | MemOps.push_back(Store); |
| 4383 | } |
| 4384 | // Whether we copied from a register or not, advance the offset |
| 4385 | // into the parameter save area by a full doubleword. |
| 4386 | ArgOffset += PtrByteSize; |
| 4387 | continue; |
| 4388 | } |
| 4389 | |
| 4390 | // The value of the object is its address, which is the address of |
| 4391 | // its first stack doubleword. |
| 4392 | InVals.push_back(FIN); |
| 4393 | |
| 4394 | // Store whatever pieces of the object are in registers to memory. |
| 4395 | for (unsigned j = 0; j < ArgSize; j += PtrByteSize) { |
| 4396 | if (GPR_idx == Num_GPR_Regs) |
| 4397 | break; |
| 4398 | |
| 4399 | unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass); |
| 4400 | FuncInfo->addLiveInAttr(VReg, Flags); |
| 4401 | SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT); |
| 4402 | SDValue Addr = FIN; |
| 4403 | if (j) { |
| 4404 | SDValue Off = DAG.getConstant(j, dl, PtrVT); |
| 4405 | Addr = DAG.getNode(ISD::ADD, dl, Off.getValueType(), Addr, Off); |
| 4406 | } |
| 4407 | SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, Addr, |
| 4408 | MachinePointerInfo(&*FuncArg, j)); |
| 4409 | MemOps.push_back(Store); |
| 4410 | ++GPR_idx; |
| 4411 | } |
| 4412 | ArgOffset += ArgSize; |
| 4413 | continue; |
| 4414 | } |
| 4415 | |
| 4416 | switch (ObjectVT.getSimpleVT().SimpleTy) { |
| 4417 | default: llvm_unreachable("Unhandled argument type!")::llvm::llvm_unreachable_internal("Unhandled argument type!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4417); |
| 4418 | case MVT::i1: |
| 4419 | case MVT::i32: |
| 4420 | case MVT::i64: |
| 4421 | if (Flags.isNest()) { |
| 4422 | // The 'nest' parameter, if any, is passed in R11. |
| 4423 | unsigned VReg = MF.addLiveIn(PPC::X11, &PPC::G8RCRegClass); |
| 4424 | ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64); |
| 4425 | |
| 4426 | if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1) |
| 4427 | ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl); |
| 4428 | |
| 4429 | break; |
| 4430 | } |
| 4431 | |
| 4432 | // These can be scalar arguments or elements of an integer array type |
| 4433 | // passed directly. Clang may use those instead of "byval" aggregate |
| 4434 | // types to avoid forcing arguments to memory unnecessarily. |
| 4435 | if (GPR_idx != Num_GPR_Regs) { |
| 4436 | unsigned VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass); |
| 4437 | FuncInfo->addLiveInAttr(VReg, Flags); |
| 4438 | ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64); |
| 4439 | |
| 4440 | if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1) |
| 4441 | // PPC64 passes i8, i16, and i32 values in i64 registers. Promote |
| 4442 | // value to MVT::i64 and then truncate to the correct register size. |
| 4443 | ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl); |
| 4444 | } else { |
| 4445 | if (CallConv == CallingConv::Fast) |
| 4446 | ComputeArgOffset(); |
| 4447 | |
| 4448 | needsLoad = true; |
| 4449 | ArgSize = PtrByteSize; |
| 4450 | } |
| 4451 | if (CallConv != CallingConv::Fast || needsLoad) |
| 4452 | ArgOffset += 8; |
| 4453 | break; |
| 4454 | |
| 4455 | case MVT::f32: |
| 4456 | case MVT::f64: |
| 4457 | // These can be scalar arguments or elements of a float array type |
| 4458 | // passed directly. The latter are used to implement ELFv2 homogenous |
| 4459 | // float aggregates. |
| 4460 | if (FPR_idx != Num_FPR_Regs) { |
| 4461 | unsigned VReg; |
| 4462 | |
| 4463 | if (ObjectVT == MVT::f32) |
| 4464 | VReg = MF.addLiveIn(FPR[FPR_idx], |
| 4465 | Subtarget.hasP8Vector() |
| 4466 | ? &PPC::VSSRCRegClass |
| 4467 | : &PPC::F4RCRegClass); |
| 4468 | else |
| 4469 | VReg = MF.addLiveIn(FPR[FPR_idx], Subtarget.hasVSX() |
| 4470 | ? &PPC::VSFRCRegClass |
| 4471 | : &PPC::F8RCRegClass); |
| 4472 | |
| 4473 | ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT); |
| 4474 | ++FPR_idx; |
| 4475 | } else if (GPR_idx != Num_GPR_Regs && CallConv != CallingConv::Fast) { |
| 4476 | // FIXME: We may want to re-enable this for CallingConv::Fast on the P8 |
| 4477 | // once we support fp <-> gpr moves. |
| 4478 | |
| 4479 | // This can only ever happen in the presence of f32 array types, |
| 4480 | // since otherwise we never run out of FPRs before running out |
| 4481 | // of GPRs. |
| 4482 | unsigned VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass); |
| 4483 | FuncInfo->addLiveInAttr(VReg, Flags); |
| 4484 | ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64); |
| 4485 | |
| 4486 | if (ObjectVT == MVT::f32) { |
| 4487 | if ((ArgOffset % PtrByteSize) == (isLittleEndian ? 4 : 0)) |
| 4488 | ArgVal = DAG.getNode(ISD::SRL, dl, MVT::i64, ArgVal, |
| 4489 | DAG.getConstant(32, dl, MVT::i32)); |
| 4490 | ArgVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, ArgVal); |
| 4491 | } |
| 4492 | |
| 4493 | ArgVal = DAG.getNode(ISD::BITCAST, dl, ObjectVT, ArgVal); |
| 4494 | } else { |
| 4495 | if (CallConv == CallingConv::Fast) |
| 4496 | ComputeArgOffset(); |
| 4497 | |
| 4498 | needsLoad = true; |
| 4499 | } |
| 4500 | |
| 4501 | // When passing an array of floats, the array occupies consecutive |
| 4502 | // space in the argument area; only round up to the next doubleword |
| 4503 | // at the end of the array. Otherwise, each float takes 8 bytes. |
| 4504 | if (CallConv != CallingConv::Fast || needsLoad) { |
| 4505 | ArgSize = Flags.isInConsecutiveRegs() ? ObjSize : PtrByteSize; |
| 4506 | ArgOffset += ArgSize; |
| 4507 | if (Flags.isInConsecutiveRegsLast()) |
| 4508 | ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize; |
| 4509 | } |
| 4510 | break; |
| 4511 | case MVT::v4f32: |
| 4512 | case MVT::v4i32: |
| 4513 | case MVT::v8i16: |
| 4514 | case MVT::v16i8: |
| 4515 | case MVT::v2f64: |
| 4516 | case MVT::v2i64: |
| 4517 | case MVT::v1i128: |
| 4518 | case MVT::f128: |
| 4519 | // These can be scalar arguments or elements of a vector array type |
| 4520 | // passed directly. The latter are used to implement ELFv2 homogenous |
| 4521 | // vector aggregates. |
| 4522 | if (VR_idx != Num_VR_Regs) { |
| 4523 | unsigned VReg = MF.addLiveIn(VR[VR_idx], &PPC::VRRCRegClass); |
| 4524 | ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT); |
| 4525 | ++VR_idx; |
| 4526 | } else { |
| 4527 | if (CallConv == CallingConv::Fast) |
| 4528 | ComputeArgOffset(); |
| 4529 | needsLoad = true; |
| 4530 | } |
| 4531 | if (CallConv != CallingConv::Fast || needsLoad) |
| 4532 | ArgOffset += 16; |
| 4533 | break; |
| 4534 | } |
| 4535 | |
| 4536 | // We need to load the argument to a virtual register if we determined |
| 4537 | // above that we ran out of physical registers of the appropriate type. |
| 4538 | if (needsLoad) { |
| 4539 | if (ObjSize < ArgSize && !isLittleEndian) |
| 4540 | CurArgOffset += ArgSize - ObjSize; |
| 4541 | int FI = MFI.CreateFixedObject(ObjSize, CurArgOffset, isImmutable); |
| 4542 | SDValue FIN = DAG.getFrameIndex(FI, PtrVT); |
| 4543 | ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, MachinePointerInfo()); |
| 4544 | } |
| 4545 | |
| 4546 | InVals.push_back(ArgVal); |
| 4547 | } |
| 4548 | |
| 4549 | // Area that is at least reserved in the caller of this function. |
| 4550 | unsigned MinReservedArea; |
| 4551 | if (HasParameterArea) |
| 4552 | MinReservedArea = std::max(ArgOffset, LinkageSize + 8 * PtrByteSize); |
| 4553 | else |
| 4554 | MinReservedArea = LinkageSize; |
| 4555 | |
| 4556 | // Set the size that is at least reserved in caller of this function. Tail |
| 4557 | // call optimized functions' reserved stack space needs to be aligned so that |
| 4558 | // taking the difference between two stack areas will result in an aligned |
| 4559 | // stack. |
| 4560 | MinReservedArea = |
| 4561 | EnsureStackAlignment(Subtarget.getFrameLowering(), MinReservedArea); |
| 4562 | FuncInfo->setMinReservedArea(MinReservedArea); |
| 4563 | |
| 4564 | // If the function takes variable number of arguments, make a frame index for |
| 4565 | // the start of the first vararg value... for expansion of llvm.va_start. |
| 4566 | // On ELFv2ABI spec, it writes: |
| 4567 | // C programs that are intended to be *portable* across different compilers |
| 4568 | // and architectures must use the header file <stdarg.h> to deal with variable |
| 4569 | // argument lists. |
| 4570 | if (isVarArg && MFI.hasVAStart()) { |
| 4571 | int Depth = ArgOffset; |
| 4572 | |
| 4573 | FuncInfo->setVarArgsFrameIndex( |
| 4574 | MFI.CreateFixedObject(PtrByteSize, Depth, true)); |
| 4575 | SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT); |
| 4576 | |
| 4577 | // If this function is vararg, store any remaining integer argument regs |
| 4578 | // to their spots on the stack so that they may be loaded by dereferencing |
| 4579 | // the result of va_next. |
| 4580 | for (GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize; |
| 4581 | GPR_idx < Num_GPR_Regs; ++GPR_idx) { |
| 4582 | unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass); |
| 4583 | SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT); |
| 4584 | SDValue Store = |
| 4585 | DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo()); |
| 4586 | MemOps.push_back(Store); |
| 4587 | // Increment the address by four for the next argument to store |
| 4588 | SDValue PtrOff = DAG.getConstant(PtrByteSize, dl, PtrVT); |
| 4589 | FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff); |
| 4590 | } |
| 4591 | } |
| 4592 | |
| 4593 | if (!MemOps.empty()) |
| 4594 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps); |
| 4595 | |
| 4596 | return Chain; |
| 4597 | } |
| 4598 | |
| 4599 | /// CalculateTailCallSPDiff - Get the amount the stack pointer has to be |
| 4600 | /// adjusted to accommodate the arguments for the tailcall. |
| 4601 | static int CalculateTailCallSPDiff(SelectionDAG& DAG, bool isTailCall, |
| 4602 | unsigned ParamSize) { |
| 4603 | |
| 4604 | if (!isTailCall) return 0; |
| 4605 | |
| 4606 | PPCFunctionInfo *FI = DAG.getMachineFunction().getInfo<PPCFunctionInfo>(); |
| 4607 | unsigned CallerMinReservedArea = FI->getMinReservedArea(); |
| 4608 | int SPDiff = (int)CallerMinReservedArea - (int)ParamSize; |
| 4609 | // Remember only if the new adjustment is bigger. |
| 4610 | if (SPDiff < FI->getTailCallSPDelta()) |
| 4611 | FI->setTailCallSPDelta(SPDiff); |
| 4612 | |
| 4613 | return SPDiff; |
| 4614 | } |
| 4615 | |
| 4616 | static bool isFunctionGlobalAddress(SDValue Callee); |
| 4617 | |
| 4618 | static bool callsShareTOCBase(const Function *Caller, SDValue Callee, |
| 4619 | const TargetMachine &TM) { |
| 4620 | // It does not make sense to call callsShareTOCBase() with a caller that |
| 4621 | // is PC Relative since PC Relative callers do not have a TOC. |
| 4622 | #ifndef NDEBUG |
| 4623 | const PPCSubtarget *STICaller = &TM.getSubtarget<PPCSubtarget>(*Caller); |
| 4624 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4625, __extension__ __PRETTY_FUNCTION__)) |
| 4625 | "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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4625, __extension__ __PRETTY_FUNCTION__)); |
| 4626 | #endif |
| 4627 | |
| 4628 | // Callee is either a GlobalAddress or an ExternalSymbol. ExternalSymbols |
| 4629 | // don't have enough information to determine if the caller and callee share |
| 4630 | // the same TOC base, so we have to pessimistically assume they don't for |
| 4631 | // correctness. |
| 4632 | GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee); |
| 4633 | if (!G) |
| 4634 | return false; |
| 4635 | |
| 4636 | const GlobalValue *GV = G->getGlobal(); |
| 4637 | |
| 4638 | // If the callee is preemptable, then the static linker will use a plt-stub |
| 4639 | // which saves the toc to the stack, and needs a nop after the call |
| 4640 | // instruction to convert to a toc-restore. |
| 4641 | if (!TM.shouldAssumeDSOLocal(*Caller->getParent(), GV)) |
| 4642 | return false; |
| 4643 | |
| 4644 | // Functions with PC Relative enabled may clobber the TOC in the same DSO. |
| 4645 | // We may need a TOC restore in the situation where the caller requires a |
| 4646 | // valid TOC but the callee is PC Relative and does not. |
| 4647 | const Function *F = dyn_cast<Function>(GV); |
| 4648 | const GlobalAlias *Alias = dyn_cast<GlobalAlias>(GV); |
| 4649 | |
| 4650 | // If we have an Alias we can try to get the function from there. |
| 4651 | if (Alias) { |
| 4652 | const GlobalObject *GlobalObj = Alias->getBaseObject(); |
| 4653 | F = dyn_cast<Function>(GlobalObj); |
| 4654 | } |
| 4655 | |
| 4656 | // If we still have no valid function pointer we do not have enough |
| 4657 | // information to determine if the callee uses PC Relative calls so we must |
| 4658 | // assume that it does. |
| 4659 | if (!F) |
| 4660 | return false; |
| 4661 | |
| 4662 | // If the callee uses PC Relative we cannot guarantee that the callee won't |
| 4663 | // clobber the TOC of the caller and so we must assume that the two |
| 4664 | // functions do not share a TOC base. |
| 4665 | const PPCSubtarget *STICallee = &TM.getSubtarget<PPCSubtarget>(*F); |
| 4666 | if (STICallee->isUsingPCRelativeCalls()) |
| 4667 | return false; |
| 4668 | |
| 4669 | // If the GV is not a strong definition then we need to assume it can be |
| 4670 | // replaced by another function at link time. The function that replaces |
| 4671 | // it may not share the same TOC as the caller since the callee may be |
| 4672 | // replaced by a PC Relative version of the same function. |
| 4673 | if (!GV->isStrongDefinitionForLinker()) |
| 4674 | return false; |
| 4675 | |
| 4676 | // The medium and large code models are expected to provide a sufficiently |
| 4677 | // large TOC to provide all data addressing needs of a module with a |
| 4678 | // single TOC. |
| 4679 | if (CodeModel::Medium == TM.getCodeModel() || |
| 4680 | CodeModel::Large == TM.getCodeModel()) |
| 4681 | return true; |
| 4682 | |
| 4683 | // Any explicitly-specified sections and section prefixes must also match. |
| 4684 | // Also, if we're using -ffunction-sections, then each function is always in |
| 4685 | // a different section (the same is true for COMDAT functions). |
| 4686 | if (TM.getFunctionSections() || GV->hasComdat() || Caller->hasComdat() || |
| 4687 | GV->getSection() != Caller->getSection()) |
| 4688 | return false; |
| 4689 | if (const auto *F = dyn_cast<Function>(GV)) { |
| 4690 | if (F->getSectionPrefix() != Caller->getSectionPrefix()) |
| 4691 | return false; |
| 4692 | } |
| 4693 | |
| 4694 | return true; |
| 4695 | } |
| 4696 | |
| 4697 | static bool |
| 4698 | needStackSlotPassParameters(const PPCSubtarget &Subtarget, |
| 4699 | const SmallVectorImpl<ISD::OutputArg> &Outs) { |
| 4700 | assert(Subtarget.is64BitELFABI())(static_cast <bool> (Subtarget.is64BitELFABI()) ? void ( 0) : __assert_fail ("Subtarget.is64BitELFABI()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 4700, __extension__ __PRETTY_FUNCTION__)); |
| 4701 | |
| 4702 | const unsigned PtrByteSize = 8; |
| 4703 | const unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize(); |
| 4704 | |
| 4705 | static const MCPhysReg GPR[] = { |
| 4706 | PPC::X3, PPC::X4, PPC::X5, PPC::X6, |
| 4707 | PPC::X7, PPC::X8, PPC::X9, PPC::X10, |
| 4708 | }; |
| 4709 | static const MCPhysReg VR[] = { |
| 4710 | PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8, |
| 4711 | PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13 |
| 4712 | }; |
| 4713 | |
| 4714 | const unsigned NumGPRs = array_lengthof(GPR); |
| 4715 | const unsigned NumFPRs = 13; |
| 4716 | const unsigned NumVRs = array_lengthof(VR); |
| 4717 | const unsigned ParamAreaSize = NumGPRs * PtrByteSize; |
| 4718 | |
| 4719 | unsigned NumBytes = LinkageSize; |
| 4720 | unsigned AvailableFPRs = NumFPRs; |
| 4721 | unsigned AvailableVRs = NumVRs; |
| 4722 | |
| 4723 | for (const ISD::OutputArg& Param : Outs) { |
| 4724 | if (Param.Flags.isNest()) continue; |
| 4725 | |
| 4726 | if (CalculateStackSlotUsed(Param.VT, Param.ArgVT, Param.Flags, PtrByteSize, |
| 4727 | LinkageSize, ParamAreaSize, NumBytes, |
| 4728 | AvailableFPRs, AvailableVRs)) |
| 4729 | return true; |
| 4730 | } |
| 4731 | return false; |
| 4732 | } |
| 4733 | |
| 4734 | static bool hasSameArgumentList(const Function *CallerFn, const CallBase &CB) { |
| 4735 | if (CB.arg_size() != CallerFn->arg_size()) |
| 4736 | return false; |
| 4737 | |
| 4738 | auto CalleeArgIter = CB.arg_begin(); |
| 4739 | auto CalleeArgEnd = CB.arg_end(); |
| 4740 | Function::const_arg_iterator CallerArgIter = CallerFn->arg_begin(); |
| 4741 | |
| 4742 | for (; CalleeArgIter != CalleeArgEnd; ++CalleeArgIter, ++CallerArgIter) { |
| 4743 | const Value* CalleeArg = *CalleeArgIter; |
| 4744 | const Value* CallerArg = &(*CallerArgIter); |
| 4745 | if (CalleeArg == CallerArg) |
| 4746 | continue; |
| 4747 | |
| 4748 | // e.g. @caller([4 x i64] %a, [4 x i64] %b) { |
| 4749 | // tail call @callee([4 x i64] undef, [4 x i64] %b) |
| 4750 | // } |
| 4751 | // 1st argument of callee is undef and has the same type as caller. |
| 4752 | if (CalleeArg->getType() == CallerArg->getType() && |
| 4753 | isa<UndefValue>(CalleeArg)) |
| 4754 | continue; |
| 4755 | |
| 4756 | return false; |
| 4757 | } |
| 4758 | |
| 4759 | return true; |
| 4760 | } |
| 4761 | |
| 4762 | // Returns true if TCO is possible between the callers and callees |
| 4763 | // calling conventions. |
| 4764 | static bool |
| 4765 | areCallingConvEligibleForTCO_64SVR4(CallingConv::ID CallerCC, |
| 4766 | CallingConv::ID CalleeCC) { |
| 4767 | // Tail calls are possible with fastcc and ccc. |
| 4768 | auto isTailCallableCC = [] (CallingConv::ID CC){ |
| 4769 | return CC == CallingConv::C || CC == CallingConv::Fast; |
| 4770 | }; |
| 4771 | if (!isTailCallableCC(CallerCC) || !isTailCallableCC(CalleeCC)) |
| 4772 | return false; |
| 4773 | |
| 4774 | // We can safely tail call both fastcc and ccc callees from a c calling |
| 4775 | // convention caller. If the caller is fastcc, we may have less stack space |
| 4776 | // than a non-fastcc caller with the same signature so disable tail-calls in |
| 4777 | // that case. |
| 4778 | return CallerCC == CallingConv::C || CallerCC == CalleeCC; |
| 4779 | } |
| 4780 | |
| 4781 | bool PPCTargetLowering::IsEligibleForTailCallOptimization_64SVR4( |
| 4782 | SDValue Callee, CallingConv::ID CalleeCC, const CallBase *CB, bool isVarArg, |
| 4783 | const SmallVectorImpl<ISD::OutputArg> &Outs, |
| 4784 | const SmallVectorImpl<ISD::InputArg> &Ins, SelectionDAG &DAG) const { |
| 4785 | bool TailCallOpt = getTargetMachine().Options.GuaranteedTailCallOpt; |
| 4786 | |
| 4787 | if (DisableSCO && !TailCallOpt) return false; |
| 4788 | |
| 4789 | // Variadic argument functions are not supported. |
| 4790 | if (isVarArg) return false; |
| 4791 | |
| 4792 | auto &Caller = DAG.getMachineFunction().getFunction(); |
| 4793 | // Check that the calling conventions are compatible for tco. |
| 4794 | if (!areCallingConvEligibleForTCO_64SVR4(Caller.getCallingConv(), CalleeCC)) |
| 4795 | return false; |
| 4796 | |
| 4797 | // Caller contains any byval parameter is not supported. |
| 4798 | if (any_of(Ins, [](const ISD::InputArg &IA) { return IA.Flags.isByVal(); })) |
| 4799 | return false; |
| 4800 | |
| 4801 | // Callee contains any byval parameter is not supported, too. |
| 4802 | // Note: This is a quick work around, because in some cases, e.g. |
| 4803 | // caller's stack size > callee's stack size, we are still able to apply |
| 4804 | // sibling call optimization. For example, gcc is able to do SCO for caller1 |
| 4805 | // in the following example, but not for caller2. |
| 4806 | // struct test { |
| 4807 | // long int a; |
| 4808 | // char ary[56]; |
| 4809 | // } gTest; |
| 4810 | // __attribute__((noinline)) int callee(struct test v, struct test *b) { |
| 4811 | // b->a = v.a; |
| 4812 | // return 0; |
| 4813 | // } |
| 4814 | // void caller1(struct test a, struct test c, struct test *b) { |
| 4815 | // callee(gTest, b); } |
| 4816 | // void caller2(struct test *b) { callee(gTest, b); } |
| 4817 | if (any_of(Outs, [](const ISD::OutputArg& OA) { return OA.Flags.isByVal(); })) |
| 4818 | return false; |
| 4819 | |
| 4820 | // If callee and caller use different calling conventions, we cannot pass |
| 4821 | // parameters on stack since offsets for the parameter area may be different. |
| 4822 | if (Caller.getCallingConv() != CalleeCC && |
| 4823 | needStackSlotPassParameters(Subtarget, Outs)) |
| 4824 | return false; |
| 4825 | |
| 4826 | // All variants of 64-bit ELF ABIs without PC-Relative addressing require that |
| 4827 | // the caller and callee share the same TOC for TCO/SCO. If the caller and |
| 4828 | // callee potentially have different TOC bases then we cannot tail call since |
| 4829 | // we need to restore the TOC pointer after the call. |
| 4830 | // ref: https://bugzilla.mozilla.org/show_bug.cgi?id=973977 |
| 4831 | // We cannot guarantee this for indirect calls or calls to external functions. |
| 4832 | // When PC-Relative addressing is used, the concept of the TOC is no longer |
| 4833 | // applicable so this check is not required. |
| 4834 | // Check first for indirect calls. |
| 4835 | if (!Subtarget.isUsingPCRelativeCalls() && |
| 4836 | !isFunctionGlobalAddress(Callee) && !isa<ExternalSymbolSDNode>(Callee)) |
| 4837 | return false; |
| 4838 | |
| 4839 | // Check if we share the TOC base. |
| 4840 | if (!Subtarget.isUsingPCRelativeCalls() && |
| 4841 | !callsShareTOCBase(&Caller, Callee, getTargetMachine())) |
| 4842 | return false; |
| 4843 | |
| 4844 | // TCO allows altering callee ABI, so we don't have to check further. |
| 4845 | if (CalleeCC == CallingConv::Fast && TailCallOpt) |
| 4846 | return true; |
| 4847 | |
| 4848 | if (DisableSCO) return false; |
| 4849 | |
| 4850 | // If callee use the same argument list that caller is using, then we can |
| 4851 | // apply SCO on this case. If it is not, then we need to check if callee needs |
| 4852 | // stack for passing arguments. |
| 4853 | // PC Relative tail calls may not have a CallBase. |
| 4854 | // If there is no CallBase we cannot verify if we have the same argument |
| 4855 | // list so assume that we don't have the same argument list. |
| 4856 | if (CB && !hasSameArgumentList(&Caller, *CB) && |
| 4857 | needStackSlotPassParameters(Subtarget, Outs)) |
| 4858 | return false; |
| 4859 | else if (!CB && needStackSlotPassParameters(Subtarget, Outs)) |
| 4860 | return false; |
| 4861 | |
| 4862 | return true; |
| 4863 | } |
| 4864 | |
| 4865 | /// IsEligibleForTailCallOptimization - Check whether the call is eligible |
| 4866 | /// for tail call optimization. Targets which want to do tail call |
| 4867 | /// optimization should implement this function. |
| 4868 | bool |
| 4869 | PPCTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee, |
| 4870 | CallingConv::ID CalleeCC, |
| 4871 | bool isVarArg, |
| 4872 | const SmallVectorImpl<ISD::InputArg> &Ins, |
| 4873 | SelectionDAG& DAG) const { |
| 4874 | if (!getTargetMachine().Options.GuaranteedTailCallOpt) |
| 4875 | return false; |
| 4876 | |
| 4877 | // Variable argument functions are not supported. |
| 4878 | if (isVarArg) |
| 4879 | return false; |
| 4880 | |
| 4881 | MachineFunction &MF = DAG.getMachineFunction(); |
| 4882 | CallingConv::ID CallerCC = MF.getFunction().getCallingConv(); |
| 4883 | if (CalleeCC == CallingConv::Fast && CallerCC == CalleeCC) { |
| 4884 | // Functions containing by val parameters are not supported. |
| 4885 | for (unsigned i = 0; i != Ins.size(); i++) { |
| 4886 | ISD::ArgFlagsTy Flags = Ins[i].Flags; |
| 4887 | if (Flags.isByVal()) return false; |
| 4888 | } |
| 4889 | |
| 4890 | // Non-PIC/GOT tail calls are supported. |
| 4891 | if (getTargetMachine().getRelocationModel() != Reloc::PIC_) |
| 4892 | return true; |
| 4893 | |
| 4894 | // At the moment we can only do local tail calls (in same module, hidden |
| 4895 | // or protected) if we are generating PIC. |
| 4896 | if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) |
| 4897 | return G->getGlobal()->hasHiddenVisibility() |
| 4898 | || G->getGlobal()->hasProtectedVisibility(); |
| 4899 | } |
| 4900 | |
| 4901 | return false; |
| 4902 | } |
| 4903 | |
| 4904 | /// isCallCompatibleAddress - Return the immediate to use if the specified |
| 4905 | /// 32-bit value is representable in the immediate field of a BxA instruction. |
| 4906 | static SDNode *isBLACompatibleAddress(SDValue Op, SelectionDAG &DAG) { |
| 4907 | ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op); |
| 4908 | if (!C) return nullptr; |
| 4909 | |
| 4910 | int Addr = C->getZExtValue(); |
| 4911 | if ((Addr & 3) != 0 || // Low 2 bits are implicitly zero. |
| 4912 | SignExtend32<26>(Addr) != Addr) |
| 4913 | return nullptr; // Top 6 bits have to be sext of immediate. |
| 4914 | |
| 4915 | return DAG |
| 4916 | .getConstant( |
| 4917 | (int)C->getZExtValue() >> 2, SDLoc(Op), |
| 4918 | DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout())) |
| 4919 | .getNode(); |
| 4920 | } |
| 4921 | |
| 4922 | namespace { |
| 4923 | |
| 4924 | struct TailCallArgumentInfo { |
| 4925 | SDValue Arg; |
| 4926 | SDValue FrameIdxOp; |
| 4927 | int FrameIdx = 0; |
| 4928 | |
| 4929 | TailCallArgumentInfo() = default; |
| 4930 | }; |
| 4931 | |
| 4932 | } // end anonymous namespace |
| 4933 | |
| 4934 | /// StoreTailCallArgumentsToStackSlot - Stores arguments to their stack slot. |
| 4935 | static void StoreTailCallArgumentsToStackSlot( |
| 4936 | SelectionDAG &DAG, SDValue Chain, |
| 4937 | const SmallVectorImpl<TailCallArgumentInfo> &TailCallArgs, |
| 4938 | SmallVectorImpl<SDValue> &MemOpChains, const SDLoc &dl) { |
| 4939 | for (unsigned i = 0, e = TailCallArgs.size(); i != e; ++i) { |
| 4940 | SDValue Arg = TailCallArgs[i].Arg; |
| 4941 | SDValue FIN = TailCallArgs[i].FrameIdxOp; |
| 4942 | int FI = TailCallArgs[i].FrameIdx; |
| 4943 | // Store relative to framepointer. |
| 4944 | MemOpChains.push_back(DAG.getStore( |
| 4945 | Chain, dl, Arg, FIN, |
| 4946 | MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI))); |
| 4947 | } |
| 4948 | } |
| 4949 | |
| 4950 | /// EmitTailCallStoreFPAndRetAddr - Move the frame pointer and return address to |
| 4951 | /// the appropriate stack slot for the tail call optimized function call. |
| 4952 | static SDValue EmitTailCallStoreFPAndRetAddr(SelectionDAG &DAG, SDValue Chain, |
| 4953 | SDValue OldRetAddr, SDValue OldFP, |
| 4954 | int SPDiff, const SDLoc &dl) { |
| 4955 | if (SPDiff) { |
| 4956 | // Calculate the new stack slot for the return address. |
| 4957 | MachineFunction &MF = DAG.getMachineFunction(); |
| 4958 | const PPCSubtarget &Subtarget = MF.getSubtarget<PPCSubtarget>(); |
| 4959 | const PPCFrameLowering *FL = Subtarget.getFrameLowering(); |
| 4960 | bool isPPC64 = Subtarget.isPPC64(); |
| 4961 | int SlotSize = isPPC64 ? 8 : 4; |
| 4962 | int NewRetAddrLoc = SPDiff + FL->getReturnSaveOffset(); |
| 4963 | int NewRetAddr = MF.getFrameInfo().CreateFixedObject(SlotSize, |
| 4964 | NewRetAddrLoc, true); |
| 4965 | EVT VT = isPPC64 ? MVT::i64 : MVT::i32; |
| 4966 | SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewRetAddr, VT); |
| 4967 | Chain = DAG.getStore(Chain, dl, OldRetAddr, NewRetAddrFrIdx, |
| 4968 | MachinePointerInfo::getFixedStack(MF, NewRetAddr)); |
| 4969 | } |
| 4970 | return Chain; |
| 4971 | } |
| 4972 | |
| 4973 | /// CalculateTailCallArgDest - Remember Argument for later processing. Calculate |
| 4974 | /// the position of the argument. |
| 4975 | static void |
| 4976 | CalculateTailCallArgDest(SelectionDAG &DAG, MachineFunction &MF, bool isPPC64, |
| 4977 | SDValue Arg, int SPDiff, unsigned ArgOffset, |
| 4978 | SmallVectorImpl<TailCallArgumentInfo>& TailCallArguments) { |
| 4979 | int Offset = ArgOffset + SPDiff; |
| 4980 | uint32_t OpSize = (Arg.getValueSizeInBits() + 7) / 8; |
| 4981 | int FI = MF.getFrameInfo().CreateFixedObject(OpSize, Offset, true); |
| 4982 | EVT VT = isPPC64 ? MVT::i64 : MVT::i32; |
| 4983 | SDValue FIN = DAG.getFrameIndex(FI, VT); |
| 4984 | TailCallArgumentInfo Info; |
| 4985 | Info.Arg = Arg; |
| 4986 | Info.FrameIdxOp = FIN; |
| 4987 | Info.FrameIdx = FI; |
| 4988 | TailCallArguments.push_back(Info); |
| 4989 | } |
| 4990 | |
| 4991 | /// EmitTCFPAndRetAddrLoad - Emit load from frame pointer and return address |
| 4992 | /// stack slot. Returns the chain as result and the loaded frame pointers in |
| 4993 | /// LROpOut/FPOpout. Used when tail calling. |
| 4994 | SDValue PPCTargetLowering::EmitTailCallLoadFPAndRetAddr( |
| 4995 | SelectionDAG &DAG, int SPDiff, SDValue Chain, SDValue &LROpOut, |
| 4996 | SDValue &FPOpOut, const SDLoc &dl) const { |
| 4997 | if (SPDiff) { |
| 4998 | // Load the LR and FP stack slot for later adjusting. |
| 4999 | EVT VT = Subtarget.isPPC64() ? MVT::i64 : MVT::i32; |
| 5000 | LROpOut = getReturnAddrFrameIndex(DAG); |
| 5001 | LROpOut = DAG.getLoad(VT, dl, Chain, LROpOut, MachinePointerInfo()); |
| 5002 | Chain = SDValue(LROpOut.getNode(), 1); |
| 5003 | } |
| 5004 | return Chain; |
| 5005 | } |
| 5006 | |
| 5007 | /// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified |
| 5008 | /// by "Src" to address "Dst" of size "Size". Alignment information is |
| 5009 | /// specified by the specific parameter attribute. The copy will be passed as |
| 5010 | /// a byval function parameter. |
| 5011 | /// Sometimes what we are copying is the end of a larger object, the part that |
| 5012 | /// does not fit in registers. |
| 5013 | static SDValue CreateCopyOfByValArgument(SDValue Src, SDValue Dst, |
| 5014 | SDValue Chain, ISD::ArgFlagsTy Flags, |
| 5015 | SelectionDAG &DAG, const SDLoc &dl) { |
| 5016 | SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), dl, MVT::i32); |
| 5017 | return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, |
| 5018 | Flags.getNonZeroByValAlign(), false, false, false, |
| 5019 | MachinePointerInfo(), MachinePointerInfo()); |
| 5020 | } |
| 5021 | |
| 5022 | /// LowerMemOpCallTo - Store the argument to the stack or remember it in case of |
| 5023 | /// tail calls. |
| 5024 | static void LowerMemOpCallTo( |
| 5025 | SelectionDAG &DAG, MachineFunction &MF, SDValue Chain, SDValue Arg, |
| 5026 | SDValue PtrOff, int SPDiff, unsigned ArgOffset, bool isPPC64, |
| 5027 | bool isTailCall, bool isVector, SmallVectorImpl<SDValue> &MemOpChains, |
| 5028 | SmallVectorImpl<TailCallArgumentInfo> &TailCallArguments, const SDLoc &dl) { |
| 5029 | EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()); |
| 5030 | if (!isTailCall) { |
| 5031 | if (isVector) { |
| 5032 | SDValue StackPtr; |
| 5033 | if (isPPC64) |
| 5034 | StackPtr = DAG.getRegister(PPC::X1, MVT::i64); |
| 5035 | else |
| 5036 | StackPtr = DAG.getRegister(PPC::R1, MVT::i32); |
| 5037 | PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, |
| 5038 | DAG.getConstant(ArgOffset, dl, PtrVT)); |
| 5039 | } |
| 5040 | MemOpChains.push_back( |
| 5041 | DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo())); |
| 5042 | // Calculate and remember argument location. |
| 5043 | } else CalculateTailCallArgDest(DAG, MF, isPPC64, Arg, SPDiff, ArgOffset, |
| 5044 | TailCallArguments); |
| 5045 | } |
| 5046 | |
| 5047 | static void |
| 5048 | PrepareTailCall(SelectionDAG &DAG, SDValue &InFlag, SDValue &Chain, |
| 5049 | const SDLoc &dl, int SPDiff, unsigned NumBytes, SDValue LROp, |
| 5050 | SDValue FPOp, |
| 5051 | SmallVectorImpl<TailCallArgumentInfo> &TailCallArguments) { |
| 5052 | // Emit a sequence of copyto/copyfrom virtual registers for arguments that |
| 5053 | // might overwrite each other in case of tail call optimization. |
| 5054 | SmallVector<SDValue, 8> MemOpChains2; |
| 5055 | // Do not flag preceding copytoreg stuff together with the following stuff. |
| 5056 | InFlag = SDValue(); |
| 5057 | StoreTailCallArgumentsToStackSlot(DAG, Chain, TailCallArguments, |
| 5058 | MemOpChains2, dl); |
| 5059 | if (!MemOpChains2.empty()) |
| 5060 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains2); |
| 5061 | |
| 5062 | // Store the return address to the appropriate stack slot. |
| 5063 | Chain = EmitTailCallStoreFPAndRetAddr(DAG, Chain, LROp, FPOp, SPDiff, dl); |
| 5064 | |
| 5065 | // Emit callseq_end just before tailcall node. |
| 5066 | Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, dl, true), |
| 5067 | DAG.getIntPtrConstant(0, dl, true), InFlag, dl); |
| 5068 | InFlag = Chain.getValue(1); |
| 5069 | } |
| 5070 | |
| 5071 | // Is this global address that of a function that can be called by name? (as |
| 5072 | // opposed to something that must hold a descriptor for an indirect call). |
| 5073 | static bool isFunctionGlobalAddress(SDValue Callee) { |
| 5074 | if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) { |
| 5075 | if (Callee.getOpcode() == ISD::GlobalTLSAddress || |
| 5076 | Callee.getOpcode() == ISD::TargetGlobalTLSAddress) |
| 5077 | return false; |
| 5078 | |
| 5079 | return G->getGlobal()->getValueType()->isFunctionTy(); |
| 5080 | } |
| 5081 | |
| 5082 | return false; |
| 5083 | } |
| 5084 | |
| 5085 | SDValue PPCTargetLowering::LowerCallResult( |
| 5086 | SDValue Chain, SDValue InFlag, CallingConv::ID CallConv, bool isVarArg, |
| 5087 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, |
| 5088 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const { |
| 5089 | SmallVector<CCValAssign, 16> RVLocs; |
| 5090 | CCState CCRetInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs, |
| 5091 | *DAG.getContext()); |
| 5092 | |
| 5093 | CCRetInfo.AnalyzeCallResult( |
| 5094 | Ins, (Subtarget.isSVR4ABI() && CallConv == CallingConv::Cold) |
| 5095 | ? RetCC_PPC_Cold |
| 5096 | : RetCC_PPC); |
| 5097 | |
| 5098 | // Copy all of the result registers out of their specified physreg. |
| 5099 | for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) { |
| 5100 | CCValAssign &VA = RVLocs[i]; |
| 5101 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5101, __extension__ __PRETTY_FUNCTION__)); |
| 5102 | |
| 5103 | SDValue Val; |
| 5104 | |
| 5105 | if (Subtarget.hasSPE() && VA.getLocVT() == MVT::f64) { |
| 5106 | SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, |
| 5107 | InFlag); |
| 5108 | Chain = Lo.getValue(1); |
| 5109 | InFlag = Lo.getValue(2); |
| 5110 | VA = RVLocs[++i]; // skip ahead to next loc |
| 5111 | SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, |
| 5112 | InFlag); |
| 5113 | Chain = Hi.getValue(1); |
| 5114 | InFlag = Hi.getValue(2); |
| 5115 | if (!Subtarget.isLittleEndian()) |
| 5116 | std::swap (Lo, Hi); |
| 5117 | Val = DAG.getNode(PPCISD::BUILD_SPE64, dl, MVT::f64, Lo, Hi); |
| 5118 | } else { |
| 5119 | Val = DAG.getCopyFromReg(Chain, dl, |
| 5120 | VA.getLocReg(), VA.getLocVT(), InFlag); |
| 5121 | Chain = Val.getValue(1); |
| 5122 | InFlag = Val.getValue(2); |
| 5123 | } |
| 5124 | |
| 5125 | switch (VA.getLocInfo()) { |
| 5126 | default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5126); |
| 5127 | case CCValAssign::Full: break; |
| 5128 | case CCValAssign::AExt: |
| 5129 | Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val); |
| 5130 | break; |
| 5131 | case CCValAssign::ZExt: |
| 5132 | Val = DAG.getNode(ISD::AssertZext, dl, VA.getLocVT(), Val, |
| 5133 | DAG.getValueType(VA.getValVT())); |
| 5134 | Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val); |
| 5135 | break; |
| 5136 | case CCValAssign::SExt: |
| 5137 | Val = DAG.getNode(ISD::AssertSext, dl, VA.getLocVT(), Val, |
| 5138 | DAG.getValueType(VA.getValVT())); |
| 5139 | Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val); |
| 5140 | break; |
| 5141 | } |
| 5142 | |
| 5143 | InVals.push_back(Val); |
| 5144 | } |
| 5145 | |
| 5146 | return Chain; |
| 5147 | } |
| 5148 | |
| 5149 | static bool isIndirectCall(const SDValue &Callee, SelectionDAG &DAG, |
| 5150 | const PPCSubtarget &Subtarget, bool isPatchPoint) { |
| 5151 | // PatchPoint calls are not indirect. |
| 5152 | if (isPatchPoint) |
| 5153 | return false; |
| 5154 | |
| 5155 | if (isFunctionGlobalAddress(Callee) || isa<ExternalSymbolSDNode>(Callee)) |
| 5156 | return false; |
| 5157 | |
| 5158 | // Darwin, and 32-bit ELF can use a BLA. The descriptor based ABIs can not |
| 5159 | // becuase the immediate function pointer points to a descriptor instead of |
| 5160 | // a function entry point. The ELFv2 ABI cannot use a BLA because the function |
| 5161 | // pointer immediate points to the global entry point, while the BLA would |
| 5162 | // need to jump to the local entry point (see rL211174). |
| 5163 | if (!Subtarget.usesFunctionDescriptors() && !Subtarget.isELFv2ABI() && |
| 5164 | isBLACompatibleAddress(Callee, DAG)) |
| 5165 | return false; |
| 5166 | |
| 5167 | return true; |
| 5168 | } |
| 5169 | |
| 5170 | // AIX and 64-bit ELF ABIs w/o PCRel require a TOC save/restore around calls. |
| 5171 | static inline bool isTOCSaveRestoreRequired(const PPCSubtarget &Subtarget) { |
| 5172 | return Subtarget.isAIXABI() || |
| 5173 | (Subtarget.is64BitELFABI() && !Subtarget.isUsingPCRelativeCalls()); |
| 5174 | } |
| 5175 | |
| 5176 | static unsigned getCallOpcode(PPCTargetLowering::CallFlags CFlags, |
| 5177 | const Function &Caller, |
| 5178 | const SDValue &Callee, |
| 5179 | const PPCSubtarget &Subtarget, |
| 5180 | const TargetMachine &TM) { |
| 5181 | if (CFlags.IsTailCall) |
| 5182 | return PPCISD::TC_RETURN; |
| 5183 | |
| 5184 | // This is a call through a function pointer. |
| 5185 | if (CFlags.IsIndirect) { |
| 5186 | // AIX and the 64-bit ELF ABIs need to maintain the TOC pointer accross |
| 5187 | // indirect calls. The save of the caller's TOC pointer to the stack will be |
| 5188 | // inserted into the DAG as part of call lowering. The restore of the TOC |
| 5189 | // pointer is modeled by using a pseudo instruction for the call opcode that |
| 5190 | // represents the 2 instruction sequence of an indirect branch and link, |
| 5191 | // immediately followed by a load of the TOC pointer from the the stack save |
| 5192 | // slot into gpr2. For 64-bit ELFv2 ABI with PCRel, do not restore the TOC |
| 5193 | // as it is not saved or used. |
| 5194 | return isTOCSaveRestoreRequired(Subtarget) ? PPCISD::BCTRL_LOAD_TOC |
| 5195 | : PPCISD::BCTRL; |
| 5196 | } |
| 5197 | |
| 5198 | if (Subtarget.isUsingPCRelativeCalls()) { |
| 5199 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5199, __extension__ __PRETTY_FUNCTION__)); |
| 5200 | return PPCISD::CALL_NOTOC; |
| 5201 | } |
| 5202 | |
| 5203 | // The ABIs that maintain a TOC pointer accross calls need to have a nop |
| 5204 | // immediately following the call instruction if the caller and callee may |
| 5205 | // have different TOC bases. At link time if the linker determines the calls |
| 5206 | // may not share a TOC base, the call is redirected to a trampoline inserted |
| 5207 | // by the linker. The trampoline will (among other things) save the callers |
| 5208 | // TOC pointer at an ABI designated offset in the linkage area and the linker |
| 5209 | // will rewrite the nop to be a load of the TOC pointer from the linkage area |
| 5210 | // into gpr2. |
| 5211 | if (Subtarget.isAIXABI() || Subtarget.is64BitELFABI()) |
| 5212 | return callsShareTOCBase(&Caller, Callee, TM) ? PPCISD::CALL |
| 5213 | : PPCISD::CALL_NOP; |
| 5214 | |
| 5215 | return PPCISD::CALL; |
| 5216 | } |
| 5217 | |
| 5218 | static SDValue transformCallee(const SDValue &Callee, SelectionDAG &DAG, |
| 5219 | const SDLoc &dl, const PPCSubtarget &Subtarget) { |
| 5220 | if (!Subtarget.usesFunctionDescriptors() && !Subtarget.isELFv2ABI()) |
| 5221 | if (SDNode *Dest = isBLACompatibleAddress(Callee, DAG)) |
| 5222 | return SDValue(Dest, 0); |
| 5223 | |
| 5224 | // Returns true if the callee is local, and false otherwise. |
| 5225 | auto isLocalCallee = [&]() { |
| 5226 | const GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee); |
| 5227 | const Module *Mod = DAG.getMachineFunction().getFunction().getParent(); |
| 5228 | const GlobalValue *GV = G ? G->getGlobal() : nullptr; |
| 5229 | |
| 5230 | return DAG.getTarget().shouldAssumeDSOLocal(*Mod, GV) && |
| 5231 | !dyn_cast_or_null<GlobalIFunc>(GV); |
| 5232 | }; |
| 5233 | |
| 5234 | // The PLT is only used in 32-bit ELF PIC mode. Attempting to use the PLT in |
| 5235 | // a static relocation model causes some versions of GNU LD (2.17.50, at |
| 5236 | // least) to force BSS-PLT, instead of secure-PLT, even if all objects are |
| 5237 | // built with secure-PLT. |
| 5238 | bool UsePlt = |
| 5239 | Subtarget.is32BitELFABI() && !isLocalCallee() && |
| 5240 | Subtarget.getTargetMachine().getRelocationModel() == Reloc::PIC_; |
| 5241 | |
| 5242 | const auto getAIXFuncEntryPointSymbolSDNode = [&](const GlobalValue *GV) { |
| 5243 | const TargetMachine &TM = Subtarget.getTargetMachine(); |
| 5244 | const TargetLoweringObjectFile *TLOF = TM.getObjFileLowering(); |
| 5245 | MCSymbolXCOFF *S = |
| 5246 | cast<MCSymbolXCOFF>(TLOF->getFunctionEntryPointSymbol(GV, TM)); |
| 5247 | |
| 5248 | MVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()); |
| 5249 | return DAG.getMCSymbol(S, PtrVT); |
| 5250 | }; |
| 5251 | |
| 5252 | if (isFunctionGlobalAddress(Callee)) { |
| 5253 | const GlobalValue *GV = cast<GlobalAddressSDNode>(Callee)->getGlobal(); |
| 5254 | |
| 5255 | if (Subtarget.isAIXABI()) { |
| 5256 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5256, __extension__ __PRETTY_FUNCTION__)); |
| 5257 | return getAIXFuncEntryPointSymbolSDNode(GV); |
| 5258 | } |
| 5259 | return DAG.getTargetGlobalAddress(GV, dl, Callee.getValueType(), 0, |
| 5260 | UsePlt ? PPCII::MO_PLT : 0); |
| 5261 | } |
| 5262 | |
| 5263 | if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) { |
| 5264 | const char *SymName = S->getSymbol(); |
| 5265 | if (Subtarget.isAIXABI()) { |
| 5266 | // If there exists a user-declared function whose name is the same as the |
| 5267 | // ExternalSymbol's, then we pick up the user-declared version. |
| 5268 | const Module *Mod = DAG.getMachineFunction().getFunction().getParent(); |
| 5269 | if (const Function *F = |
| 5270 | dyn_cast_or_null<Function>(Mod->getNamedValue(SymName))) |
| 5271 | return getAIXFuncEntryPointSymbolSDNode(F); |
| 5272 | |
| 5273 | // On AIX, direct function calls reference the symbol for the function's |
| 5274 | // entry point, which is named by prepending a "." before the function's |
| 5275 | // C-linkage name. A Qualname is returned here because an external |
| 5276 | // function entry point is a csect with XTY_ER property. |
| 5277 | const auto getExternalFunctionEntryPointSymbol = [&](StringRef SymName) { |
| 5278 | auto &Context = DAG.getMachineFunction().getMMI().getContext(); |
| 5279 | MCSectionXCOFF *Sec = Context.getXCOFFSection( |
| 5280 | (Twine(".") + Twine(SymName)).str(), SectionKind::getMetadata(), |
| 5281 | XCOFF::CsectProperties(XCOFF::XMC_PR, XCOFF::XTY_ER)); |
| 5282 | return Sec->getQualNameSymbol(); |
| 5283 | }; |
| 5284 | |
| 5285 | SymName = getExternalFunctionEntryPointSymbol(SymName)->getName().data(); |
| 5286 | } |
| 5287 | return DAG.getTargetExternalSymbol(SymName, Callee.getValueType(), |
| 5288 | UsePlt ? PPCII::MO_PLT : 0); |
| 5289 | } |
| 5290 | |
| 5291 | // No transformation needed. |
| 5292 | assert(Callee.getNode() && "What no callee?")(static_cast <bool> (Callee.getNode() && "What no callee?" ) ? void (0) : __assert_fail ("Callee.getNode() && \"What no callee?\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5292, __extension__ __PRETTY_FUNCTION__)); |
| 5293 | return Callee; |
| 5294 | } |
| 5295 | |
| 5296 | static SDValue getOutputChainFromCallSeq(SDValue CallSeqStart) { |
| 5297 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5298, __extension__ __PRETTY_FUNCTION__)) |
| 5298 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5298, __extension__ __PRETTY_FUNCTION__)); |
| 5299 | |
| 5300 | // The last operand is the chain, except when the node has glue. If the node |
| 5301 | // has glue, then the last operand is the glue, and the chain is the second |
| 5302 | // last operand. |
| 5303 | SDValue LastValue = CallSeqStart.getValue(CallSeqStart->getNumValues() - 1); |
| 5304 | if (LastValue.getValueType() != MVT::Glue) |
| 5305 | return LastValue; |
| 5306 | |
| 5307 | return CallSeqStart.getValue(CallSeqStart->getNumValues() - 2); |
| 5308 | } |
| 5309 | |
| 5310 | // Creates the node that moves a functions address into the count register |
| 5311 | // to prepare for an indirect call instruction. |
| 5312 | static void prepareIndirectCall(SelectionDAG &DAG, SDValue &Callee, |
| 5313 | SDValue &Glue, SDValue &Chain, |
| 5314 | const SDLoc &dl) { |
| 5315 | SDValue MTCTROps[] = {Chain, Callee, Glue}; |
| 5316 | EVT ReturnTypes[] = {MVT::Other, MVT::Glue}; |
| 5317 | Chain = DAG.getNode(PPCISD::MTCTR, dl, makeArrayRef(ReturnTypes, 2), |
| 5318 | makeArrayRef(MTCTROps, Glue.getNode() ? 3 : 2)); |
| 5319 | // The glue is the second value produced. |
| 5320 | Glue = Chain.getValue(1); |
| 5321 | } |
| 5322 | |
| 5323 | static void prepareDescriptorIndirectCall(SelectionDAG &DAG, SDValue &Callee, |
| 5324 | SDValue &Glue, SDValue &Chain, |
| 5325 | SDValue CallSeqStart, |
| 5326 | const CallBase *CB, const SDLoc &dl, |
| 5327 | bool hasNest, |
| 5328 | const PPCSubtarget &Subtarget) { |
| 5329 | // Function pointers in the 64-bit SVR4 ABI do not point to the function |
| 5330 | // entry point, but to the function descriptor (the function entry point |
| 5331 | // address is part of the function descriptor though). |
| 5332 | // The function descriptor is a three doubleword structure with the |
| 5333 | // following fields: function entry point, TOC base address and |
| 5334 | // environment pointer. |
| 5335 | // Thus for a call through a function pointer, the following actions need |
| 5336 | // to be performed: |
| 5337 | // 1. Save the TOC of the caller in the TOC save area of its stack |
| 5338 | // frame (this is done in LowerCall_Darwin() or LowerCall_64SVR4()). |
| 5339 | // 2. Load the address of the function entry point from the function |
| 5340 | // descriptor. |
| 5341 | // 3. Load the TOC of the callee from the function descriptor into r2. |
| 5342 | // 4. Load the environment pointer from the function descriptor into |
| 5343 | // r11. |
| 5344 | // 5. Branch to the function entry point address. |
| 5345 | // 6. On return of the callee, the TOC of the caller needs to be |
| 5346 | // restored (this is done in FinishCall()). |
| 5347 | // |
| 5348 | // The loads are scheduled at the beginning of the call sequence, and the |
| 5349 | // register copies are flagged together to ensure that no other |
| 5350 | // operations can be scheduled in between. E.g. without flagging the |
| 5351 | // copies together, a TOC access in the caller could be scheduled between |
| 5352 | // the assignment of the callee TOC and the branch to the callee, which leads |
| 5353 | // to incorrect code. |
| 5354 | |
| 5355 | // Start by loading the function address from the descriptor. |
| 5356 | SDValue LDChain = getOutputChainFromCallSeq(CallSeqStart); |
| 5357 | auto MMOFlags = Subtarget.hasInvariantFunctionDescriptors() |
| 5358 | ? (MachineMemOperand::MODereferenceable | |
| 5359 | MachineMemOperand::MOInvariant) |
| 5360 | : MachineMemOperand::MONone; |
| 5361 | |
| 5362 | MachinePointerInfo MPI(CB ? CB->getCalledOperand() : nullptr); |
| 5363 | |
| 5364 | // Registers used in building the DAG. |
| 5365 | const MCRegister EnvPtrReg = Subtarget.getEnvironmentPointerRegister(); |
| 5366 | const MCRegister TOCReg = Subtarget.getTOCPointerRegister(); |
| 5367 | |
| 5368 | // Offsets of descriptor members. |
| 5369 | const unsigned TOCAnchorOffset = Subtarget.descriptorTOCAnchorOffset(); |
| 5370 | const unsigned EnvPtrOffset = Subtarget.descriptorEnvironmentPointerOffset(); |
| 5371 | |
| 5372 | const MVT RegVT = Subtarget.isPPC64() ? MVT::i64 : MVT::i32; |
| 5373 | const unsigned Alignment = Subtarget.isPPC64() ? 8 : 4; |
| 5374 | |
| 5375 | // One load for the functions entry point address. |
| 5376 | SDValue LoadFuncPtr = DAG.getLoad(RegVT, dl, LDChain, Callee, MPI, |
| 5377 | Alignment, MMOFlags); |
| 5378 | |
| 5379 | // One for loading the TOC anchor for the module that contains the called |
| 5380 | // function. |
| 5381 | SDValue TOCOff = DAG.getIntPtrConstant(TOCAnchorOffset, dl); |
| 5382 | SDValue AddTOC = DAG.getNode(ISD::ADD, dl, RegVT, Callee, TOCOff); |
| 5383 | SDValue TOCPtr = |
| 5384 | DAG.getLoad(RegVT, dl, LDChain, AddTOC, |
| 5385 | MPI.getWithOffset(TOCAnchorOffset), Alignment, MMOFlags); |
| 5386 | |
| 5387 | // One for loading the environment pointer. |
| 5388 | SDValue PtrOff = DAG.getIntPtrConstant(EnvPtrOffset, dl); |
| 5389 | SDValue AddPtr = DAG.getNode(ISD::ADD, dl, RegVT, Callee, PtrOff); |
| 5390 | SDValue LoadEnvPtr = |
| 5391 | DAG.getLoad(RegVT, dl, LDChain, AddPtr, |
| 5392 | MPI.getWithOffset(EnvPtrOffset), Alignment, MMOFlags); |
| 5393 | |
| 5394 | |
| 5395 | // Then copy the newly loaded TOC anchor to the TOC pointer. |
| 5396 | SDValue TOCVal = DAG.getCopyToReg(Chain, dl, TOCReg, TOCPtr, Glue); |
| 5397 | Chain = TOCVal.getValue(0); |
| 5398 | Glue = TOCVal.getValue(1); |
| 5399 | |
| 5400 | // If the function call has an explicit 'nest' parameter, it takes the |
| 5401 | // place of the environment pointer. |
| 5402 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5403, __extension__ __PRETTY_FUNCTION__)) |
| 5403 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5403, __extension__ __PRETTY_FUNCTION__)); |
| 5404 | if (!hasNest) { |
| 5405 | SDValue EnvVal = DAG.getCopyToReg(Chain, dl, EnvPtrReg, LoadEnvPtr, Glue); |
| 5406 | Chain = EnvVal.getValue(0); |
| 5407 | Glue = EnvVal.getValue(1); |
| 5408 | } |
| 5409 | |
| 5410 | // The rest of the indirect call sequence is the same as the non-descriptor |
| 5411 | // DAG. |
| 5412 | prepareIndirectCall(DAG, LoadFuncPtr, Glue, Chain, dl); |
| 5413 | } |
| 5414 | |
| 5415 | static void |
| 5416 | buildCallOperands(SmallVectorImpl<SDValue> &Ops, |
| 5417 | PPCTargetLowering::CallFlags CFlags, const SDLoc &dl, |
| 5418 | SelectionDAG &DAG, |
| 5419 | SmallVector<std::pair<unsigned, SDValue>, 8> &RegsToPass, |
| 5420 | SDValue Glue, SDValue Chain, SDValue &Callee, int SPDiff, |
| 5421 | const PPCSubtarget &Subtarget) { |
| 5422 | const bool IsPPC64 = Subtarget.isPPC64(); |
| 5423 | // MVT for a general purpose register. |
| 5424 | const MVT RegVT = IsPPC64 ? MVT::i64 : MVT::i32; |
| 5425 | |
| 5426 | // First operand is always the chain. |
| 5427 | Ops.push_back(Chain); |
| 5428 | |
| 5429 | // If it's a direct call pass the callee as the second operand. |
| 5430 | if (!CFlags.IsIndirect) |
| 5431 | Ops.push_back(Callee); |
| 5432 | else { |
| 5433 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5433, __extension__ __PRETTY_FUNCTION__)); |
| 5434 | |
| 5435 | // For the TOC based ABIs, we have saved the TOC pointer to the linkage area |
| 5436 | // on the stack (this would have been done in `LowerCall_64SVR4` or |
| 5437 | // `LowerCall_AIX`). The call instruction is a pseudo instruction that |
| 5438 | // represents both the indirect branch and a load that restores the TOC |
| 5439 | // pointer from the linkage area. The operand for the TOC restore is an add |
| 5440 | // of the TOC save offset to the stack pointer. This must be the second |
| 5441 | // operand: after the chain input but before any other variadic arguments. |
| 5442 | // For 64-bit ELFv2 ABI with PCRel, do not restore the TOC as it is not |
| 5443 | // saved or used. |
| 5444 | if (isTOCSaveRestoreRequired(Subtarget)) { |
| 5445 | const MCRegister StackPtrReg = Subtarget.getStackPointerRegister(); |
| 5446 | |
| 5447 | SDValue StackPtr = DAG.getRegister(StackPtrReg, RegVT); |
| 5448 | unsigned TOCSaveOffset = Subtarget.getFrameLowering()->getTOCSaveOffset(); |
| 5449 | SDValue TOCOff = DAG.getIntPtrConstant(TOCSaveOffset, dl); |
| 5450 | SDValue AddTOC = DAG.getNode(ISD::ADD, dl, RegVT, StackPtr, TOCOff); |
| 5451 | Ops.push_back(AddTOC); |
| 5452 | } |
| 5453 | |
| 5454 | // Add the register used for the environment pointer. |
| 5455 | if (Subtarget.usesFunctionDescriptors() && !CFlags.HasNest) |
| 5456 | Ops.push_back(DAG.getRegister(Subtarget.getEnvironmentPointerRegister(), |
| 5457 | RegVT)); |
| 5458 | |
| 5459 | |
| 5460 | // Add CTR register as callee so a bctr can be emitted later. |
| 5461 | if (CFlags.IsTailCall) |
| 5462 | Ops.push_back(DAG.getRegister(IsPPC64 ? PPC::CTR8 : PPC::CTR, RegVT)); |
| 5463 | } |
| 5464 | |
| 5465 | // If this is a tail call add stack pointer delta. |
| 5466 | if (CFlags.IsTailCall) |
| 5467 | Ops.push_back(DAG.getConstant(SPDiff, dl, MVT::i32)); |
| 5468 | |
| 5469 | // Add argument registers to the end of the list so that they are known live |
| 5470 | // into the call. |
| 5471 | for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) |
| 5472 | Ops.push_back(DAG.getRegister(RegsToPass[i].first, |
| 5473 | RegsToPass[i].second.getValueType())); |
| 5474 | |
| 5475 | // We cannot add R2/X2 as an operand here for PATCHPOINT, because there is |
| 5476 | // no way to mark dependencies as implicit here. |
| 5477 | // We will add the R2/X2 dependency in EmitInstrWithCustomInserter. |
| 5478 | if ((Subtarget.is64BitELFABI() || Subtarget.isAIXABI()) && |
| 5479 | !CFlags.IsPatchPoint && !Subtarget.isUsingPCRelativeCalls()) |
| 5480 | Ops.push_back(DAG.getRegister(Subtarget.getTOCPointerRegister(), RegVT)); |
| 5481 | |
| 5482 | // Add implicit use of CR bit 6 for 32-bit SVR4 vararg calls |
| 5483 | if (CFlags.IsVarArg && Subtarget.is32BitELFABI()) |
| 5484 | Ops.push_back(DAG.getRegister(PPC::CR1EQ, MVT::i32)); |
| 5485 | |
| 5486 | // Add a register mask operand representing the call-preserved registers. |
| 5487 | const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo(); |
| 5488 | const uint32_t *Mask = |
| 5489 | TRI->getCallPreservedMask(DAG.getMachineFunction(), CFlags.CallConv); |
| 5490 | 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\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5490, __extension__ __PRETTY_FUNCTION__)); |
| 5491 | Ops.push_back(DAG.getRegisterMask(Mask)); |
| 5492 | |
| 5493 | // If the glue is valid, it is the last operand. |
| 5494 | if (Glue.getNode()) |
| 5495 | Ops.push_back(Glue); |
| 5496 | } |
| 5497 | |
| 5498 | SDValue PPCTargetLowering::FinishCall( |
| 5499 | CallFlags CFlags, const SDLoc &dl, SelectionDAG &DAG, |
| 5500 | SmallVector<std::pair<unsigned, SDValue>, 8> &RegsToPass, SDValue Glue, |
| 5501 | SDValue Chain, SDValue CallSeqStart, SDValue &Callee, int SPDiff, |
| 5502 | unsigned NumBytes, const SmallVectorImpl<ISD::InputArg> &Ins, |
| 5503 | SmallVectorImpl<SDValue> &InVals, const CallBase *CB) const { |
| 5504 | |
| 5505 | if ((Subtarget.is64BitELFABI() && !Subtarget.isUsingPCRelativeCalls()) || |
| 5506 | Subtarget.isAIXABI()) |
| 5507 | setUsesTOCBasePtr(DAG); |
| 5508 | |
| 5509 | unsigned CallOpc = |
| 5510 | getCallOpcode(CFlags, DAG.getMachineFunction().getFunction(), Callee, |
| 5511 | Subtarget, DAG.getTarget()); |
| 5512 | |
| 5513 | if (!CFlags.IsIndirect) |
| 5514 | Callee = transformCallee(Callee, DAG, dl, Subtarget); |
| 5515 | else if (Subtarget.usesFunctionDescriptors()) |
| 5516 | prepareDescriptorIndirectCall(DAG, Callee, Glue, Chain, CallSeqStart, CB, |
| 5517 | dl, CFlags.HasNest, Subtarget); |
| 5518 | else |
| 5519 | prepareIndirectCall(DAG, Callee, Glue, Chain, dl); |
| 5520 | |
| 5521 | // Build the operand list for the call instruction. |
| 5522 | SmallVector<SDValue, 8> Ops; |
| 5523 | buildCallOperands(Ops, CFlags, dl, DAG, RegsToPass, Glue, Chain, Callee, |
| 5524 | SPDiff, Subtarget); |
| 5525 | |
| 5526 | // Emit tail call. |
| 5527 | if (CFlags.IsTailCall) { |
| 5528 | // Indirect tail call when using PC Relative calls do not have the same |
| 5529 | // constraints. |
| 5530 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)) |
| 5531 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)) |
| 5532 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)) |
| 5533 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)) |
| 5534 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)) |
| 5535 | (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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)) |
| 5536 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)) |
| 5537 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)) |
| 5538 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5538, __extension__ __PRETTY_FUNCTION__)); |
| 5539 | // PC Relative calls also use TC_RETURN as the way to mark tail calls. |
| 5540 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5541, __extension__ __PRETTY_FUNCTION__)) |
| 5541 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5541, __extension__ __PRETTY_FUNCTION__)); |
| 5542 | DAG.getMachineFunction().getFrameInfo().setHasTailCall(); |
| 5543 | return DAG.getNode(CallOpc, dl, MVT::Other, Ops); |
| 5544 | } |
| 5545 | |
| 5546 | std::array<EVT, 2> ReturnTypes = {{MVT::Other, MVT::Glue}}; |
| 5547 | Chain = DAG.getNode(CallOpc, dl, ReturnTypes, Ops); |
| 5548 | DAG.addNoMergeSiteInfo(Chain.getNode(), CFlags.NoMerge); |
| 5549 | Glue = Chain.getValue(1); |
| 5550 | |
| 5551 | // When performing tail call optimization the callee pops its arguments off |
| 5552 | // the stack. Account for this here so these bytes can be pushed back on in |
| 5553 | // PPCFrameLowering::eliminateCallFramePseudoInstr. |
| 5554 | int BytesCalleePops = (CFlags.CallConv == CallingConv::Fast && |
| 5555 | getTargetMachine().Options.GuaranteedTailCallOpt) |
| 5556 | ? NumBytes |
| 5557 | : 0; |
| 5558 | |
| 5559 | Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, dl, true), |
| 5560 | DAG.getIntPtrConstant(BytesCalleePops, dl, true), |
| 5561 | Glue, dl); |
| 5562 | Glue = Chain.getValue(1); |
| 5563 | |
| 5564 | return LowerCallResult(Chain, Glue, CFlags.CallConv, CFlags.IsVarArg, Ins, dl, |
| 5565 | DAG, InVals); |
| 5566 | } |
| 5567 | |
| 5568 | SDValue |
| 5569 | PPCTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI, |
| 5570 | SmallVectorImpl<SDValue> &InVals) const { |
| 5571 | SelectionDAG &DAG = CLI.DAG; |
| 5572 | SDLoc &dl = CLI.DL; |
| 5573 | SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs; |
| 5574 | SmallVectorImpl<SDValue> &OutVals = CLI.OutVals; |
| 5575 | SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins; |
| 5576 | SDValue Chain = CLI.Chain; |
| 5577 | SDValue Callee = CLI.Callee; |
| 5578 | bool &isTailCall = CLI.IsTailCall; |
| 5579 | CallingConv::ID CallConv = CLI.CallConv; |
| 5580 | bool isVarArg = CLI.IsVarArg; |
| 5581 | bool isPatchPoint = CLI.IsPatchPoint; |
| 5582 | const CallBase *CB = CLI.CB; |
| 5583 | |
| 5584 | if (isTailCall) { |
| 5585 | if (Subtarget.useLongCalls() && !(CB && CB->isMustTailCall())) |
| 5586 | isTailCall = false; |
| 5587 | else if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) |
| 5588 | isTailCall = IsEligibleForTailCallOptimization_64SVR4( |
| 5589 | Callee, CallConv, CB, isVarArg, Outs, Ins, DAG); |
| 5590 | else |
| 5591 | isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv, isVarArg, |
| 5592 | Ins, DAG); |
| 5593 | if (isTailCall) { |
| 5594 | ++NumTailCalls; |
| 5595 | if (!getTargetMachine().Options.GuaranteedTailCallOpt) |
| 5596 | ++NumSiblingCalls; |
| 5597 | |
| 5598 | // PC Relative calls no longer guarantee that the callee is a Global |
| 5599 | // Address Node. The callee could be an indirect tail call in which |
| 5600 | // case the SDValue for the callee could be a load (to load the address |
| 5601 | // of a function pointer) or it may be a register copy (to move the |
| 5602 | // address of the callee from a function parameter into a virtual |
| 5603 | // register). It may also be an ExternalSymbolSDNode (ex memcopy). |
| 5604 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5606, __extension__ __PRETTY_FUNCTION__)) |
| 5605 | 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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5606, __extension__ __PRETTY_FUNCTION__)) |
| 5606 | "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.\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5606, __extension__ __PRETTY_FUNCTION__)); |
| 5607 | |
| 5608 | 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) |
| 5609 | << "\nTCO callee: ")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("ppc-lowering")) { dbgs() << "TCO caller: " << DAG .getMachineFunction().getName() << "\nTCO callee: "; } } while (false); |
| 5610 | LLVM_DEBUG(Callee.dump())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType ("ppc-lowering")) { Callee.dump(); } } while (false); |
| 5611 | } |
| 5612 | } |
| 5613 | |
| 5614 | if (!isTailCall && CB && CB->isMustTailCall()) |
| 5615 | report_fatal_error("failed to perform tail call elimination on a call " |
| 5616 | "site marked musttail"); |
| 5617 | |
| 5618 | // When long calls (i.e. indirect calls) are always used, calls are always |
| 5619 | // made via function pointer. If we have a function name, first translate it |
| 5620 | // into a pointer. |
| 5621 | if (Subtarget.useLongCalls() && isa<GlobalAddressSDNode>(Callee) && |
| 5622 | !isTailCall) |
| 5623 | Callee = LowerGlobalAddress(Callee, DAG); |
| 5624 | |
| 5625 | CallFlags CFlags( |
| 5626 | CallConv, isTailCall, isVarArg, isPatchPoint, |
| 5627 | isIndirectCall(Callee, DAG, Subtarget, isPatchPoint), |
| 5628 | // hasNest |
| 5629 | Subtarget.is64BitELFABI() && |
| 5630 | any_of(Outs, [](ISD::OutputArg Arg) { return Arg.Flags.isNest(); }), |
| 5631 | CLI.NoMerge); |
| 5632 | |
| 5633 | if (Subtarget.isAIXABI()) |
| 5634 | return LowerCall_AIX(Chain, Callee, CFlags, Outs, OutVals, Ins, dl, DAG, |
| 5635 | InVals, CB); |
| 5636 | |
| 5637 | assert(Subtarget.isSVR4ABI())(static_cast <bool> (Subtarget.isSVR4ABI()) ? void (0) : __assert_fail ("Subtarget.isSVR4ABI()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5637, __extension__ __PRETTY_FUNCTION__)); |
| 5638 | if (Subtarget.isPPC64()) |
| 5639 | return LowerCall_64SVR4(Chain, Callee, CFlags, Outs, OutVals, Ins, dl, DAG, |
| 5640 | InVals, CB); |
| 5641 | return LowerCall_32SVR4(Chain, Callee, CFlags, Outs, OutVals, Ins, dl, DAG, |
| 5642 | InVals, CB); |
| 5643 | } |
| 5644 | |
| 5645 | SDValue PPCTargetLowering::LowerCall_32SVR4( |
| 5646 | SDValue Chain, SDValue Callee, CallFlags CFlags, |
| 5647 | const SmallVectorImpl<ISD::OutputArg> &Outs, |
| 5648 | const SmallVectorImpl<SDValue> &OutVals, |
| 5649 | const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl, |
| 5650 | SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals, |
| 5651 | const CallBase *CB) const { |
| 5652 | // See PPCTargetLowering::LowerFormalArguments_32SVR4() for a description |
| 5653 | // of the 32-bit SVR4 ABI stack frame layout. |
| 5654 | |
| 5655 | const CallingConv::ID CallConv = CFlags.CallConv; |
| 5656 | const bool IsVarArg = CFlags.IsVarArg; |
| 5657 | const bool IsTailCall = CFlags.IsTailCall; |
| 5658 | |
| 5659 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5661, __extension__ __PRETTY_FUNCTION__)) |
| 5660 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5661, __extension__ __PRETTY_FUNCTION__)) |
| 5661 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5661, __extension__ __PRETTY_FUNCTION__)); |
| 5662 | |
| 5663 | const Align PtrAlign(4); |
| 5664 | |
| 5665 | MachineFunction &MF = DAG.getMachineFunction(); |
| 5666 | |
| 5667 | // Mark this function as potentially containing a function that contains a |
| 5668 | // tail call. As a consequence the frame pointer will be used for dynamicalloc |
| 5669 | // and restoring the callers stack pointer in this functions epilog. This is |
| 5670 | // done because by tail calling the called function might overwrite the value |
| 5671 | // in this function's (MF) stack pointer stack slot 0(SP). |
| 5672 | if (getTargetMachine().Options.GuaranteedTailCallOpt && |
| 5673 | CallConv == CallingConv::Fast) |
| 5674 | MF.getInfo<PPCFunctionInfo>()->setHasFastCall(); |
| 5675 | |
| 5676 | // Count how many bytes are to be pushed on the stack, including the linkage |
| 5677 | // area, parameter list area and the part of the local variable space which |
| 5678 | // contains copies of aggregates which are passed by value. |
| 5679 | |
| 5680 | // Assign locations to all of the outgoing arguments. |
| 5681 | SmallVector<CCValAssign, 16> ArgLocs; |
| 5682 | PPCCCState CCInfo(CallConv, IsVarArg, MF, ArgLocs, *DAG.getContext()); |
| 5683 | |
| 5684 | // Reserve space for the linkage area on the stack. |
| 5685 | CCInfo.AllocateStack(Subtarget.getFrameLowering()->getLinkageSize(), |
| 5686 | PtrAlign); |
| 5687 | if (useSoftFloat()) |
| 5688 | CCInfo.PreAnalyzeCallOperands(Outs); |
| 5689 | |
| 5690 | if (IsVarArg) { |
| 5691 | // Handle fixed and variable vector arguments differently. |
| 5692 | // Fixed vector arguments go into registers as long as registers are |
| 5693 | // available. Variable vector arguments always go into memory. |
| 5694 | unsigned NumArgs = Outs.size(); |
| 5695 | |
| 5696 | for (unsigned i = 0; i != NumArgs; ++i) { |
| 5697 | MVT ArgVT = Outs[i].VT; |
| 5698 | ISD::ArgFlagsTy ArgFlags = Outs[i].Flags; |
| 5699 | bool Result; |
| 5700 | |
| 5701 | if (Outs[i].IsFixed) { |
| 5702 | Result = CC_PPC32_SVR4(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags, |
| 5703 | CCInfo); |
| 5704 | } else { |
| 5705 | Result = CC_PPC32_SVR4_VarArg(i, ArgVT, ArgVT, CCValAssign::Full, |
| 5706 | ArgFlags, CCInfo); |
| 5707 | } |
| 5708 | |
| 5709 | if (Result) { |
| 5710 | #ifndef NDEBUG |
| 5711 | errs() << "Call operand #" << i << " has unhandled type " |
| 5712 | << EVT(ArgVT).getEVTString() << "\n"; |
| 5713 | #endif |
| 5714 | llvm_unreachable(nullptr)::llvm::llvm_unreachable_internal(nullptr, "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5714); |
| 5715 | } |
| 5716 | } |
| 5717 | } else { |
| 5718 | // All arguments are treated the same. |
| 5719 | CCInfo.AnalyzeCallOperands(Outs, CC_PPC32_SVR4); |
| 5720 | } |
| 5721 | CCInfo.clearWasPPCF128(); |
| 5722 | |
| 5723 | // Assign locations to all of the outgoing aggregate by value arguments. |
| 5724 | SmallVector<CCValAssign, 16> ByValArgLocs; |
| 5725 | CCState CCByValInfo(CallConv, IsVarArg, MF, ByValArgLocs, *DAG.getContext()); |
| 5726 | |
| 5727 | // Reserve stack space for the allocations in CCInfo. |
| 5728 | CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrAlign); |
| 5729 | |
| 5730 | CCByValInfo.AnalyzeCallOperands(Outs, CC_PPC32_SVR4_ByVal); |
| 5731 | |
| 5732 | // Size of the linkage area, parameter list area and the part of the local |
| 5733 | // space variable where copies of aggregates which are passed by value are |
| 5734 | // stored. |
| 5735 | unsigned NumBytes = CCByValInfo.getNextStackOffset(); |
| 5736 | |
| 5737 | // Calculate by how many bytes the stack has to be adjusted in case of tail |
| 5738 | // call optimization. |
| 5739 | int SPDiff = CalculateTailCallSPDiff(DAG, IsTailCall, NumBytes); |
| 5740 | |
| 5741 | // Adjust the stack pointer for the new arguments... |
| 5742 | // These operations are automatically eliminated by the prolog/epilog pass |
| 5743 | Chain = DAG.getCALLSEQ_START(Chain, NumBytes, 0, dl); |
| 5744 | SDValue CallSeqStart = Chain; |
| 5745 | |
| 5746 | // Load the return address and frame pointer so it can be moved somewhere else |
| 5747 | // later. |
| 5748 | SDValue LROp, FPOp; |
| 5749 | Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, dl); |
| 5750 | |
| 5751 | // Set up a copy of the stack pointer for use loading and storing any |
| 5752 | // arguments that may not fit in the registers available for argument |
| 5753 | // passing. |
| 5754 | SDValue StackPtr = DAG.getRegister(PPC::R1, MVT::i32); |
| 5755 | |
| 5756 | SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass; |
| 5757 | SmallVector<TailCallArgumentInfo, 8> TailCallArguments; |
| 5758 | SmallVector<SDValue, 8> MemOpChains; |
| 5759 | |
| 5760 | bool seenFloatArg = false; |
| 5761 | // Walk the register/memloc assignments, inserting copies/loads. |
| 5762 | // i - Tracks the index into the list of registers allocated for the call |
| 5763 | // RealArgIdx - Tracks the index into the list of actual function arguments |
| 5764 | // j - Tracks the index into the list of byval arguments |
| 5765 | for (unsigned i = 0, RealArgIdx = 0, j = 0, e = ArgLocs.size(); |
| 5766 | i != e; |
| 5767 | ++i, ++RealArgIdx) { |
| 5768 | CCValAssign &VA = ArgLocs[i]; |
| 5769 | SDValue Arg = OutVals[RealArgIdx]; |
| 5770 | ISD::ArgFlagsTy Flags = Outs[RealArgIdx].Flags; |
| 5771 | |
| 5772 | if (Flags.isByVal()) { |
| 5773 | // Argument is an aggregate which is passed by value, thus we need to |
| 5774 | // create a copy of it in the local variable space of the current stack |
| 5775 | // frame (which is the stack frame of the caller) and pass the address of |
| 5776 | // this copy to the callee. |
| 5777 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5777, __extension__ __PRETTY_FUNCTION__)); |
| 5778 | CCValAssign &ByValVA = ByValArgLocs[j++]; |
| 5779 | 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!\"" , "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5779, __extension__ __PRETTY_FUNCTION__)); |
| 5780 | |
| 5781 | // Memory reserved in the local variable space of the callers stack frame. |
| 5782 | unsigned LocMemOffset = ByValVA.getLocMemOffset(); |
| 5783 | |
| 5784 | SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl); |
| 5785 | PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(MF.getDataLayout()), |
| 5786 | StackPtr, PtrOff); |
| 5787 | |
| 5788 | // Create a copy of the argument in the local area of the current |
| 5789 | // stack frame. |
| 5790 | SDValue MemcpyCall = |
| 5791 | CreateCopyOfByValArgument(Arg, PtrOff, |
| 5792 | CallSeqStart.getNode()->getOperand(0), |
| 5793 | Flags, DAG, dl); |
| 5794 | |
| 5795 | // This must go outside the CALLSEQ_START..END. |
| 5796 | SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall, NumBytes, 0, |
| 5797 | SDLoc(MemcpyCall)); |
| 5798 | DAG.ReplaceAllUsesWith(CallSeqStart.getNode(), |
| 5799 | NewCallSeqStart.getNode()); |
| 5800 | Chain = CallSeqStart = NewCallSeqStart; |
| 5801 | |
| 5802 | // Pass the address of the aggregate copy on the stack either in a |
| 5803 | // physical register or in the parameter list area of the current stack |
| 5804 | // frame to the callee. |
| 5805 | Arg = PtrOff; |
| 5806 | } |
| 5807 | |
| 5808 | // When useCRBits() is true, there can be i1 arguments. |
| 5809 | // It is because getRegisterType(MVT::i1) => MVT::i1, |
| 5810 | // and for other integer types getRegisterType() => MVT::i32. |
| 5811 | // Extend i1 and ensure callee will get i32. |
| 5812 | if (Arg.getValueType() == MVT::i1) |
| 5813 | Arg = DAG.getNode(Flags.isSExt() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, |
| 5814 | dl, MVT::i32, Arg); |
| 5815 | |
| 5816 | if (VA.isRegLoc()) { |
| 5817 | seenFloatArg |= VA.getLocVT().isFloatingPoint(); |
| 5818 | // Put argument in a physical register. |
| 5819 | if (Subtarget.hasSPE() && Arg.getValueType() == MVT::f64) { |
| 5820 | bool IsLE = Subtarget.isLittleEndian(); |
| 5821 | SDValue SVal = DAG.getNode(PPCISD::EXTRACT_SPE, dl, MVT::i32, Arg, |
| 5822 | DAG.getIntPtrConstant(IsLE ? 0 : 1, dl)); |
| 5823 | RegsToPass.push_back(std::make_pair(VA.getLocReg(), SVal.getValue(0))); |
| 5824 | SVal = DAG.getNode(PPCISD::EXTRACT_SPE, dl, MVT::i32, Arg, |
| 5825 | DAG.getIntPtrConstant(IsLE ? 1 : 0, dl)); |
| 5826 | RegsToPass.push_back(std::make_pair(ArgLocs[++i].getLocReg(), |
| 5827 | SVal.getValue(0))); |
| 5828 | } else |
| 5829 | RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg)); |
| 5830 | } else { |
| 5831 | // Put argument in the parameter list area of the current stack frame. |
| 5832 | assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail ("VA.isMemLoc()", "/build/llvm-toolchain-snapshot-13~++20210726100616+dead50d4427c/llvm/lib/Target/PowerPC/PPCISelLowering.cpp" , 5832, __extension__ __PRETTY_FUNCTION__)); |
| 5833 | unsigned LocMemOffset = VA.getLocMemOffset(); |
| 5834 | |
| 5835 | if (!IsTailCall) { |
| 5836 | SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl); |
| 5837 | PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(MF.getDataLayout()), |
| 5838 | StackPtr, PtrOff); |
| 5839 | |
| 5840 | MemOpChains.push_back( |
| 5841 | DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo())); |
| 5842 | } else { |
| 5843 | // Calculate and remember argument location. |
| 5844 | CalculateTailCallArgDest(DAG, MF, false, Arg, SPDiff, LocMemOffset, |
| 5845 | TailCallArguments); |
| 5846 | } |
| 5847 | } |
| 5848 | } |
| 5849 | |
| 5850 | if (!MemOpChains.empty()) |
| 5851 | Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains); |
| 5852 | |
| 5853 | // Build a sequence of copy-to-reg nodes chained together with token chain |
| 5854 | // and flag operands which copy the outgoing args into the appropriate regs. |
| 5855 | SDValue InFlag; |
| 5856 | for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) { |
| 5857 | Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first, |
| 5858 | RegsToPass[i].second, InFlag); |
| 5859 | InFlag = Chain.getValue(1); |
| 5860 | } |
| 5861 | |
| 5862 | // Set CR bit 6 to true if this is a vararg call with floating args passed in |
| 5863 | // registers. |
| 5864 | if (IsVarArg) { |
| 5865 | SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue); |
| 5866 | SDValue Ops[] = { Chain, InFlag }; |
| 5867 | |
| 5868 | Chain = DAG.getNode(seenFloatArg ? PPCISD::CR6SET : PPCISD::CR6UNSET, |
| 5869 | dl, VTs, makeArrayRef(Ops, InFlag.getNode() ? 2 : 1)); |
| 5870 | |
| 5871 | InFlag = Chain.getValue(1); |
| 5872 | } |
| 5873 | |
| 5874 | if (IsTailCall) |
| 5875 | PrepareTailCall(DAG, InFlag, Chain, dl, SPDiff, NumBytes, LROp, FPOp, |
| 5876 | TailCallArguments); |
| 5877 | |
| 5878 | return FinishCall(CFlags, dl, DAG, RegsToPass, InFlag, Chain, CallSeqStart, |
| 5879 | Callee, SPDiff, NumBytes, Ins, InVals, CB); |
| 5880 | } |
| 5881 | |
| 5882 | // Copy an argument into memory, being careful to do this outside the |
| 5883 | // c |