Bug Summary

File:lib/Target/PowerPC/PPCISelLowering.cpp
Warning:line 1045, column 10
Called C++ object pointer is null

Annotated Source Code

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/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp

1//===-- PPCISelLowering.cpp - PPC DAG Lowering Implementation -------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the PPCISelLowering class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "PPCISelLowering.h"
15#include "MCTargetDesc/PPCPredicates.h"
16#include "PPC.h"
17#include "PPCCCState.h"
18#include "PPCCallingConv.h"
19#include "PPCFrameLowering.h"
20#include "PPCInstrInfo.h"
21#include "PPCMachineFunctionInfo.h"
22#include "PPCPerfectShuffle.h"
23#include "PPCRegisterInfo.h"
24#include "PPCSubtarget.h"
25#include "PPCTargetMachine.h"
26#include "llvm/ADT/APFloat.h"
27#include "llvm/ADT/APInt.h"
28#include "llvm/ADT/ArrayRef.h"
29#include "llvm/ADT/DenseMap.h"
30#include "llvm/ADT/None.h"
31#include "llvm/ADT/STLExtras.h"
32#include "llvm/ADT/SmallPtrSet.h"
33#include "llvm/ADT/SmallSet.h"
34#include "llvm/ADT/SmallVector.h"
35#include "llvm/ADT/Statistic.h"
36#include "llvm/ADT/StringRef.h"
37#include "llvm/ADT/StringSwitch.h"
38#include "llvm/CodeGen/CallingConvLower.h"
39#include "llvm/CodeGen/ISDOpcodes.h"
40#include "llvm/CodeGen/MachineBasicBlock.h"
41#include "llvm/CodeGen/MachineFrameInfo.h"
42#include "llvm/CodeGen/MachineFunction.h"
43#include "llvm/CodeGen/MachineInstr.h"
44#include "llvm/CodeGen/MachineInstrBuilder.h"
45#include "llvm/CodeGen/MachineJumpTableInfo.h"
46#include "llvm/CodeGen/MachineLoopInfo.h"
47#include "llvm/CodeGen/MachineMemOperand.h"
48#include "llvm/CodeGen/MachineOperand.h"
49#include "llvm/CodeGen/MachineRegisterInfo.h"
50#include "llvm/CodeGen/MachineValueType.h"
51#include "llvm/CodeGen/RuntimeLibcalls.h"
52#include "llvm/CodeGen/SelectionDAG.h"
53#include "llvm/CodeGen/SelectionDAGNodes.h"
54#include "llvm/CodeGen/TargetInstrInfo.h"
55#include "llvm/CodeGen/TargetLowering.h"
56#include "llvm/CodeGen/TargetRegisterInfo.h"
57#include "llvm/CodeGen/ValueTypes.h"
58#include "llvm/IR/CallSite.h"
59#include "llvm/IR/CallingConv.h"
60#include "llvm/IR/Constant.h"
61#include "llvm/IR/Constants.h"
62#include "llvm/IR/DataLayout.h"
63#include "llvm/IR/DebugLoc.h"
64#include "llvm/IR/DerivedTypes.h"
65#include "llvm/IR/Function.h"
66#include "llvm/IR/GlobalValue.h"
67#include "llvm/IR/IRBuilder.h"
68#include "llvm/IR/Instructions.h"
69#include "llvm/IR/Intrinsics.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/MCExpr.h"
75#include "llvm/MC/MCRegisterInfo.h"
76#include "llvm/Support/AtomicOrdering.h"
77#include "llvm/Support/BranchProbability.h"
78#include "llvm/Support/Casting.h"
79#include "llvm/Support/CodeGen.h"
80#include "llvm/Support/CommandLine.h"
81#include "llvm/Support/Compiler.h"
82#include "llvm/Support/Debug.h"
83#include "llvm/Support/ErrorHandling.h"
84#include "llvm/Support/Format.h"
85#include "llvm/Support/KnownBits.h"
86#include "llvm/Support/MathExtras.h"
87#include "llvm/Support/raw_ostream.h"
88#include "llvm/Target/TargetMachine.h"
89#include "llvm/Target/TargetOptions.h"
90#include <algorithm>
91#include <cassert>
92#include <cstdint>
93#include <iterator>
94#include <list>
95#include <utility>
96#include <vector>
97
98using namespace llvm;
99
100#define DEBUG_TYPE"ppc-lowering" "ppc-lowering"
101
102static cl::opt<bool> DisablePPCPreinc("disable-ppc-preinc",
103cl::desc("disable preincrement load/store generation on PPC"), cl::Hidden);
104
105static cl::opt<bool> DisableILPPref("disable-ppc-ilp-pref",
106cl::desc("disable setting the node scheduling preference to ILP on PPC"), cl::Hidden);
107
108static cl::opt<bool> DisablePPCUnaligned("disable-ppc-unaligned",
109cl::desc("disable unaligned load/store generation on PPC"), cl::Hidden);
110
111static cl::opt<bool> DisableSCO("disable-ppc-sco",
112cl::desc("disable sibling call optimization on ppc"), cl::Hidden);
113
114STATISTIC(NumTailCalls, "Number of tail calls")static llvm::Statistic NumTailCalls = {"ppc-lowering", "NumTailCalls"
, "Number of tail calls", {0}, false}
;
115STATISTIC(NumSiblingCalls, "Number of sibling calls")static llvm::Statistic NumSiblingCalls = {"ppc-lowering", "NumSiblingCalls"
, "Number of sibling calls", {0}, false}
;
116
117static bool isNByteElemShuffleMask(ShuffleVectorSDNode *, unsigned, int);
118
119// FIXME: Remove this once the bug has been fixed!
120extern cl::opt<bool> ANDIGlueBug;
121
122PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
123 const PPCSubtarget &STI)
124 : TargetLowering(TM), Subtarget(STI) {
125 // Use _setjmp/_longjmp instead of setjmp/longjmp.
126 setUseUnderscoreSetJmp(true);
127 setUseUnderscoreLongJmp(true);
128
129 // On PPC32/64, arguments smaller than 4/8 bytes are extended, so all
130 // arguments are at least 4/8 bytes aligned.
131 bool isPPC64 = Subtarget.isPPC64();
132 setMinStackArgumentAlignment(isPPC64 ? 8:4);
133
134 // Set up the register classes.
135 addRegisterClass(MVT::i32, &PPC::GPRCRegClass);
136 if (!useSoftFloat()) {
137 addRegisterClass(MVT::f32, &PPC::F4RCRegClass);
138 addRegisterClass(MVT::f64, &PPC::F8RCRegClass);
139 }
140
141 // Match BITREVERSE to customized fast code sequence in the td file.
142 setOperationAction(ISD::BITREVERSE, MVT::i32, Legal);
143 setOperationAction(ISD::BITREVERSE, MVT::i64, Legal);
144
145 // PowerPC has an i16 but no i8 (or i1) SEXTLOAD.
146 for (MVT VT : MVT::integer_valuetypes()) {
147 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote);
148 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i8, Expand);
149 }
150
151 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
152
153 // PowerPC has pre-inc load and store's.
154 setIndexedLoadAction(ISD::PRE_INC, MVT::i1, Legal);
155 setIndexedLoadAction(ISD::PRE_INC, MVT::i8, Legal);
156 setIndexedLoadAction(ISD::PRE_INC, MVT::i16, Legal);
157 setIndexedLoadAction(ISD::PRE_INC, MVT::i32, Legal);
158 setIndexedLoadAction(ISD::PRE_INC, MVT::i64, Legal);
159 setIndexedLoadAction(ISD::PRE_INC, MVT::f32, Legal);
160 setIndexedLoadAction(ISD::PRE_INC, MVT::f64, Legal);
161 setIndexedStoreAction(ISD::PRE_INC, MVT::i1, Legal);
162 setIndexedStoreAction(ISD::PRE_INC, MVT::i8, Legal);
163 setIndexedStoreAction(ISD::PRE_INC, MVT::i16, Legal);
164 setIndexedStoreAction(ISD::PRE_INC, MVT::i32, Legal);
165 setIndexedStoreAction(ISD::PRE_INC, MVT::i64, Legal);
166 setIndexedStoreAction(ISD::PRE_INC, MVT::f32, Legal);
167 setIndexedStoreAction(ISD::PRE_INC, MVT::f64, Legal);
168
169 if (Subtarget.useCRBits()) {
170 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
171
172 if (isPPC64 || Subtarget.hasFPCVT()) {
173 setOperationAction(ISD::SINT_TO_FP, MVT::i1, Promote);
174 AddPromotedToType (ISD::SINT_TO_FP, MVT::i1,
175 isPPC64 ? MVT::i64 : MVT::i32);
176 setOperationAction(ISD::UINT_TO_FP, MVT::i1, Promote);
177 AddPromotedToType(ISD::UINT_TO_FP, MVT::i1,
178 isPPC64 ? MVT::i64 : MVT::i32);
179 } else {
180 setOperationAction(ISD::SINT_TO_FP, MVT::i1, Custom);
181 setOperationAction(ISD::UINT_TO_FP, MVT::i1, Custom);
182 }
183
184 // PowerPC does not support direct load/store of condition registers.
185 setOperationAction(ISD::LOAD, MVT::i1, Custom);
186 setOperationAction(ISD::STORE, MVT::i1, Custom);
187
188 // FIXME: Remove this once the ANDI glue bug is fixed:
189 if (ANDIGlueBug)
190 setOperationAction(ISD::TRUNCATE, MVT::i1, Custom);
191
192 for (MVT VT : MVT::integer_valuetypes()) {
193 setLoadExtAction(ISD::SEXTLOAD, VT, MVT::i1, Promote);
194 setLoadExtAction(ISD::ZEXTLOAD, VT, MVT::i1, Promote);
195 setTruncStoreAction(VT, MVT::i1, Expand);
196 }
197
198 addRegisterClass(MVT::i1, &PPC::CRBITRCRegClass);
199 }
200
201 // This is used in the ppcf128->int sequence. Note it has different semantics
202 // from FP_ROUND: that rounds to nearest, this rounds to zero.
203 setOperationAction(ISD::FP_ROUND_INREG, MVT::ppcf128, Custom);
204
205 // We do not currently implement these libm ops for PowerPC.
206 setOperationAction(ISD::FFLOOR, MVT::ppcf128, Expand);
207 setOperationAction(ISD::FCEIL, MVT::ppcf128, Expand);
208 setOperationAction(ISD::FTRUNC, MVT::ppcf128, Expand);
209 setOperationAction(ISD::FRINT, MVT::ppcf128, Expand);
210 setOperationAction(ISD::FNEARBYINT, MVT::ppcf128, Expand);
211 setOperationAction(ISD::FREM, MVT::ppcf128, Expand);
212
213 // PowerPC has no SREM/UREM instructions unless we are on P9
214 // On P9 we may use a hardware instruction to compute the remainder.
215 // The instructions are not legalized directly because in the cases where the
216 // result of both the remainder and the division is required it is more
217 // efficient to compute the remainder from the result of the division rather
218 // than use the remainder instruction.
219 if (Subtarget.isISA3_0()) {
220 setOperationAction(ISD::SREM, MVT::i32, Custom);
221 setOperationAction(ISD::UREM, MVT::i32, Custom);
222 setOperationAction(ISD::SREM, MVT::i64, Custom);
223 setOperationAction(ISD::UREM, MVT::i64, Custom);
224 } else {
225 setOperationAction(ISD::SREM, MVT::i32, Expand);
226 setOperationAction(ISD::UREM, MVT::i32, Expand);
227 setOperationAction(ISD::SREM, MVT::i64, Expand);
228 setOperationAction(ISD::UREM, MVT::i64, Expand);
229 }
230
231 if (Subtarget.hasP9Vector()) {
232 setOperationAction(ISD::ABS, MVT::v4i32, Legal);
233 setOperationAction(ISD::ABS, MVT::v8i16, Legal);
234 setOperationAction(ISD::ABS, MVT::v16i8, Legal);
235 }
236
237 // Don't use SMUL_LOHI/UMUL_LOHI or SDIVREM/UDIVREM to lower SREM/UREM.
238 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
239 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
240 setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
241 setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
242 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
243 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
244 setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
245 setOperationAction(ISD::SDIVREM, MVT::i64, Expand);
246
247 // We don't support sin/cos/sqrt/fmod/pow
248 setOperationAction(ISD::FSIN , MVT::f64, Expand);
249 setOperationAction(ISD::FCOS , MVT::f64, Expand);
250 setOperationAction(ISD::FSINCOS, MVT::f64, Expand);
251 setOperationAction(ISD::FREM , MVT::f64, Expand);
252 setOperationAction(ISD::FPOW , MVT::f64, Expand);
253 setOperationAction(ISD::FMA , MVT::f64, Legal);
254 setOperationAction(ISD::FSIN , MVT::f32, Expand);
255 setOperationAction(ISD::FCOS , MVT::f32, Expand);
256 setOperationAction(ISD::FSINCOS, MVT::f32, Expand);
257 setOperationAction(ISD::FREM , MVT::f32, Expand);
258 setOperationAction(ISD::FPOW , MVT::f32, Expand);
259 setOperationAction(ISD::FMA , MVT::f32, Legal);
260
261 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
262
263 // If we're enabling GP optimizations, use hardware square root
264 if (!Subtarget.hasFSQRT() &&
265 !(TM.Options.UnsafeFPMath && Subtarget.hasFRSQRTE() &&
266 Subtarget.hasFRE()))
267 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
268
269 if (!Subtarget.hasFSQRT() &&
270 !(TM.Options.UnsafeFPMath && Subtarget.hasFRSQRTES() &&
271 Subtarget.hasFRES()))
272 setOperationAction(ISD::FSQRT, MVT::f32, Expand);
273
274 if (Subtarget.hasFCPSGN()) {
275 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Legal);
276 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Legal);
277 } else {
278 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
279 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
280 }
281
282 if (Subtarget.hasFPRND()) {
283 setOperationAction(ISD::FFLOOR, MVT::f64, Legal);
284 setOperationAction(ISD::FCEIL, MVT::f64, Legal);
285 setOperationAction(ISD::FTRUNC, MVT::f64, Legal);
286 setOperationAction(ISD::FROUND, MVT::f64, Legal);
287
288 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
289 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
290 setOperationAction(ISD::FTRUNC, MVT::f32, Legal);
291 setOperationAction(ISD::FROUND, MVT::f32, Legal);
292 }
293
294 // PowerPC does not have BSWAP, but we can use vector BSWAP instruction xxbrd
295 // to speed up scalar BSWAP64.
296 // CTPOP or CTTZ were introduced in P8/P9 respectivelly
297 setOperationAction(ISD::BSWAP, MVT::i32 , Expand);
298 if (Subtarget.isISA3_0()) {
299 setOperationAction(ISD::BSWAP, MVT::i64 , Custom);
300 setOperationAction(ISD::CTTZ , MVT::i32 , Legal);
301 setOperationAction(ISD::CTTZ , MVT::i64 , Legal);
302 } else {
303 setOperationAction(ISD::BSWAP, MVT::i64 , Expand);
304 setOperationAction(ISD::CTTZ , MVT::i32 , Expand);
305 setOperationAction(ISD::CTTZ , MVT::i64 , Expand);
306 }
307
308 if (Subtarget.hasPOPCNTD() == PPCSubtarget::POPCNTD_Fast) {
309 setOperationAction(ISD::CTPOP, MVT::i32 , Legal);
310 setOperationAction(ISD::CTPOP, MVT::i64 , Legal);
311 } else {
312 setOperationAction(ISD::CTPOP, MVT::i32 , Expand);
313 setOperationAction(ISD::CTPOP, MVT::i64 , Expand);
314 }
315
316 // PowerPC does not have ROTR
317 setOperationAction(ISD::ROTR, MVT::i32 , Expand);
318 setOperationAction(ISD::ROTR, MVT::i64 , Expand);
319
320 if (!Subtarget.useCRBits()) {
321 // PowerPC does not have Select
322 setOperationAction(ISD::SELECT, MVT::i32, Expand);
323 setOperationAction(ISD::SELECT, MVT::i64, Expand);
324 setOperationAction(ISD::SELECT, MVT::f32, Expand);
325 setOperationAction(ISD::SELECT, MVT::f64, Expand);
326 }
327
328 // PowerPC wants to turn select_cc of FP into fsel when possible.
329 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
330 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
331
332 // PowerPC wants to optimize integer setcc a bit
333 if (!Subtarget.useCRBits())
334 setOperationAction(ISD::SETCC, MVT::i32, Custom);
335
336 // PowerPC does not have BRCOND which requires SetCC
337 if (!Subtarget.useCRBits())
338 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
339
340 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
341
342 // PowerPC turns FP_TO_SINT into FCTIWZ and some load/stores.
343 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
344
345 // PowerPC does not have [U|S]INT_TO_FP
346 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Expand);
347 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
348
349 if (Subtarget.hasDirectMove() && isPPC64) {
350 setOperationAction(ISD::BITCAST, MVT::f32, Legal);
351 setOperationAction(ISD::BITCAST, MVT::i32, Legal);
352 setOperationAction(ISD::BITCAST, MVT::i64, Legal);
353 setOperationAction(ISD::BITCAST, MVT::f64, Legal);
354 } else {
355 setOperationAction(ISD::BITCAST, MVT::f32, Expand);
356 setOperationAction(ISD::BITCAST, MVT::i32, Expand);
357 setOperationAction(ISD::BITCAST, MVT::i64, Expand);
358 setOperationAction(ISD::BITCAST, MVT::f64, Expand);
359 }
360
361 // We cannot sextinreg(i1). Expand to shifts.
362 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
363
364 // NOTE: EH_SJLJ_SETJMP/_LONGJMP supported here is NOT intended to support
365 // SjLj exception handling but a light-weight setjmp/longjmp replacement to
366 // support continuation, user-level threading, and etc.. As a result, no
367 // other SjLj exception interfaces are implemented and please don't build
368 // your own exception handling based on them.
369 // LLVM/Clang supports zero-cost DWARF exception handling.
370 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
371 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
372
373 // We want to legalize GlobalAddress and ConstantPool nodes into the
374 // appropriate instructions to materialize the address.
375 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
376 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
377 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
378 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
379 setOperationAction(ISD::JumpTable, MVT::i32, Custom);
380 setOperationAction(ISD::GlobalAddress, MVT::i64, Custom);
381 setOperationAction(ISD::GlobalTLSAddress, MVT::i64, Custom);
382 setOperationAction(ISD::BlockAddress, MVT::i64, Custom);
383 setOperationAction(ISD::ConstantPool, MVT::i64, Custom);
384 setOperationAction(ISD::JumpTable, MVT::i64, Custom);
385
386 // TRAP is legal.
387 setOperationAction(ISD::TRAP, MVT::Other, Legal);
388
389 // TRAMPOLINE is custom lowered.
390 setOperationAction(ISD::INIT_TRAMPOLINE, MVT::Other, Custom);
391 setOperationAction(ISD::ADJUST_TRAMPOLINE, MVT::Other, Custom);
392
393 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
394 setOperationAction(ISD::VASTART , MVT::Other, Custom);
395
396 if (Subtarget.isSVR4ABI()) {
397 if (isPPC64) {
398 // VAARG always uses double-word chunks, so promote anything smaller.
399 setOperationAction(ISD::VAARG, MVT::i1, Promote);
400 AddPromotedToType (ISD::VAARG, MVT::i1, MVT::i64);
401 setOperationAction(ISD::VAARG, MVT::i8, Promote);
402 AddPromotedToType (ISD::VAARG, MVT::i8, MVT::i64);
403 setOperationAction(ISD::VAARG, MVT::i16, Promote);
404 AddPromotedToType (ISD::VAARG, MVT::i16, MVT::i64);
405 setOperationAction(ISD::VAARG, MVT::i32, Promote);
406 AddPromotedToType (ISD::VAARG, MVT::i32, MVT::i64);
407 setOperationAction(ISD::VAARG, MVT::Other, Expand);
408 } else {
409 // VAARG is custom lowered with the 32-bit SVR4 ABI.
410 setOperationAction(ISD::VAARG, MVT::Other, Custom);
411 setOperationAction(ISD::VAARG, MVT::i64, Custom);
412 }
413 } else
414 setOperationAction(ISD::VAARG, MVT::Other, Expand);
415
416 if (Subtarget.isSVR4ABI() && !isPPC64)
417 // VACOPY is custom lowered with the 32-bit SVR4 ABI.
418 setOperationAction(ISD::VACOPY , MVT::Other, Custom);
419 else
420 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
421
422 // Use the default implementation.
423 setOperationAction(ISD::VAEND , MVT::Other, Expand);
424 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
425 setOperationAction(ISD::STACKRESTORE , MVT::Other, Custom);
426 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
427 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64 , Custom);
428 setOperationAction(ISD::GET_DYNAMIC_AREA_OFFSET, MVT::i32, Custom);
429 setOperationAction(ISD::GET_DYNAMIC_AREA_OFFSET, MVT::i64, Custom);
430 setOperationAction(ISD::EH_DWARF_CFA, MVT::i32, Custom);
431 setOperationAction(ISD::EH_DWARF_CFA, MVT::i64, Custom);
432
433 // We want to custom lower some of our intrinsics.
434 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
435
436 // To handle counter-based loop conditions.
437 setOperationAction(ISD::INTRINSIC_W_CHAIN, MVT::i1, Custom);
438
439 setOperationAction(ISD::INTRINSIC_VOID, MVT::i8, Custom);
440 setOperationAction(ISD::INTRINSIC_VOID, MVT::i16, Custom);
441 setOperationAction(ISD::INTRINSIC_VOID, MVT::i32, Custom);
442 setOperationAction(ISD::INTRINSIC_VOID, MVT::Other, Custom);
443
444 // Comparisons that require checking two conditions.
445 setCondCodeAction(ISD::SETULT, MVT::f32, Expand);
446 setCondCodeAction(ISD::SETULT, MVT::f64, Expand);
447 setCondCodeAction(ISD::SETUGT, MVT::f32, Expand);
448 setCondCodeAction(ISD::SETUGT, MVT::f64, Expand);
449 setCondCodeAction(ISD::SETUEQ, MVT::f32, Expand);
450 setCondCodeAction(ISD::SETUEQ, MVT::f64, Expand);
451 setCondCodeAction(ISD::SETOGE, MVT::f32, Expand);
452 setCondCodeAction(ISD::SETOGE, MVT::f64, Expand);
453 setCondCodeAction(ISD::SETOLE, MVT::f32, Expand);
454 setCondCodeAction(ISD::SETOLE, MVT::f64, Expand);
455 setCondCodeAction(ISD::SETONE, MVT::f32, Expand);
456 setCondCodeAction(ISD::SETONE, MVT::f64, Expand);
457
458 if (Subtarget.has64BitSupport()) {
459 // They also have instructions for converting between i64 and fp.
460 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
461 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
462 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
463 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Expand);
464 // This is just the low 32 bits of a (signed) fp->i64 conversion.
465 // We cannot do this with Promote because i64 is not a legal type.
466 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
467
468 if (Subtarget.hasLFIWAX() || Subtarget.isPPC64())
469 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
470 } else {
471 // PowerPC does not have FP_TO_UINT on 32-bit implementations.
472 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
473 }
474
475 // With the instructions enabled under FPCVT, we can do everything.
476 if (Subtarget.hasFPCVT()) {
477 if (Subtarget.has64BitSupport()) {
478 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
479 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom);
480 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
481 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
482 }
483
484 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
485 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
486 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
487 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
488 }
489
490 if (Subtarget.use64BitRegs()) {
491 // 64-bit PowerPC implementations can support i64 types directly
492 addRegisterClass(MVT::i64, &PPC::G8RCRegClass);
493 // BUILD_PAIR can't be handled natively, and should be expanded to shl/or
494 setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
495 // 64-bit PowerPC wants to expand i128 shifts itself.
496 setOperationAction(ISD::SHL_PARTS, MVT::i64, Custom);
497 setOperationAction(ISD::SRA_PARTS, MVT::i64, Custom);
498 setOperationAction(ISD::SRL_PARTS, MVT::i64, Custom);
499 } else {
500 // 32-bit PowerPC wants to expand i64 shifts itself.
501 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
502 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
503 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
504 }
505
506 if (Subtarget.hasAltivec()) {
507 // First set operation action for all vector types to expand. Then we
508 // will selectively turn on ones that can be effectively codegen'd.
509 for (MVT VT : MVT::vector_valuetypes()) {
510 // add/sub are legal for all supported vector VT's.
511 setOperationAction(ISD::ADD, VT, Legal);
512 setOperationAction(ISD::SUB, VT, Legal);
513
514 // Vector instructions introduced in P8
515 if (Subtarget.hasP8Altivec() && (VT.SimpleTy != MVT::v1i128)) {
516 setOperationAction(ISD::CTPOP, VT, Legal);
517 setOperationAction(ISD::CTLZ, VT, Legal);
518 }
519 else {
520 setOperationAction(ISD::CTPOP, VT, Expand);
521 setOperationAction(ISD::CTLZ, VT, Expand);
522 }
523
524 // Vector instructions introduced in P9
525 if (Subtarget.hasP9Altivec() && (VT.SimpleTy != MVT::v1i128))
526 setOperationAction(ISD::CTTZ, VT, Legal);
527 else
528 setOperationAction(ISD::CTTZ, VT, Expand);
529
530 // We promote all shuffles to v16i8.
531 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Promote);
532 AddPromotedToType (ISD::VECTOR_SHUFFLE, VT, MVT::v16i8);
533
534 // We promote all non-typed operations to v4i32.
535 setOperationAction(ISD::AND , VT, Promote);
536 AddPromotedToType (ISD::AND , VT, MVT::v4i32);
537 setOperationAction(ISD::OR , VT, Promote);
538 AddPromotedToType (ISD::OR , VT, MVT::v4i32);
539 setOperationAction(ISD::XOR , VT, Promote);
540 AddPromotedToType (ISD::XOR , VT, MVT::v4i32);
541 setOperationAction(ISD::LOAD , VT, Promote);
542 AddPromotedToType (ISD::LOAD , VT, MVT::v4i32);
543 setOperationAction(ISD::SELECT, VT, Promote);
544 AddPromotedToType (ISD::SELECT, VT, MVT::v4i32);
545 setOperationAction(ISD::SELECT_CC, VT, Promote);
546 AddPromotedToType (ISD::SELECT_CC, VT, MVT::v4i32);
547 setOperationAction(ISD::STORE, VT, Promote);
548 AddPromotedToType (ISD::STORE, VT, MVT::v4i32);
549
550 // No other operations are legal.
551 setOperationAction(ISD::MUL , VT, Expand);
552 setOperationAction(ISD::SDIV, VT, Expand);
553 setOperationAction(ISD::SREM, VT, Expand);
554 setOperationAction(ISD::UDIV, VT, Expand);
555 setOperationAction(ISD::UREM, VT, Expand);
556 setOperationAction(ISD::FDIV, VT, Expand);
557 setOperationAction(ISD::FREM, VT, Expand);
558 setOperationAction(ISD::FNEG, VT, Expand);
559 setOperationAction(ISD::FSQRT, VT, Expand);
560 setOperationAction(ISD::FLOG, VT, Expand);
561 setOperationAction(ISD::FLOG10, VT, Expand);
562 setOperationAction(ISD::FLOG2, VT, Expand);
563 setOperationAction(ISD::FEXP, VT, Expand);
564 setOperationAction(ISD::FEXP2, VT, Expand);
565 setOperationAction(ISD::FSIN, VT, Expand);
566 setOperationAction(ISD::FCOS, VT, Expand);
567 setOperationAction(ISD::FABS, VT, Expand);
568 setOperationAction(ISD::FFLOOR, VT, Expand);
569 setOperationAction(ISD::FCEIL, VT, Expand);
570 setOperationAction(ISD::FTRUNC, VT, Expand);
571 setOperationAction(ISD::FRINT, VT, Expand);
572 setOperationAction(ISD::FNEARBYINT, VT, Expand);
573 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Expand);
574 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Expand);
575 setOperationAction(ISD::BUILD_VECTOR, VT, Expand);
576 setOperationAction(ISD::MULHU, VT, Expand);
577 setOperationAction(ISD::MULHS, VT, Expand);
578 setOperationAction(ISD::UMUL_LOHI, VT, Expand);
579 setOperationAction(ISD::SMUL_LOHI, VT, Expand);
580 setOperationAction(ISD::UDIVREM, VT, Expand);
581 setOperationAction(ISD::SDIVREM, VT, Expand);
582 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Expand);
583 setOperationAction(ISD::FPOW, VT, Expand);
584 setOperationAction(ISD::BSWAP, VT, Expand);
585 setOperationAction(ISD::VSELECT, VT, Expand);
586 setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
587 setOperationAction(ISD::ROTL, VT, Expand);
588 setOperationAction(ISD::ROTR, VT, Expand);
589
590 for (MVT InnerVT : MVT::vector_valuetypes()) {
591 setTruncStoreAction(VT, InnerVT, Expand);
592 setLoadExtAction(ISD::SEXTLOAD, VT, InnerVT, Expand);
593 setLoadExtAction(ISD::ZEXTLOAD, VT, InnerVT, Expand);
594 setLoadExtAction(ISD::EXTLOAD, VT, InnerVT, Expand);
595 }
596 }
597
598 // We can custom expand all VECTOR_SHUFFLEs to VPERM, others we can handle
599 // with merges, splats, etc.
600 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v16i8, Custom);
601
602 setOperationAction(ISD::AND , MVT::v4i32, Legal);
603 setOperationAction(ISD::OR , MVT::v4i32, Legal);
604 setOperationAction(ISD::XOR , MVT::v4i32, Legal);
605 setOperationAction(ISD::LOAD , MVT::v4i32, Legal);
606 setOperationAction(ISD::SELECT, MVT::v4i32,
607 Subtarget.useCRBits() ? Legal : Expand);
608 setOperationAction(ISD::STORE , MVT::v4i32, Legal);
609 setOperationAction(ISD::FP_TO_SINT, MVT::v4i32, Legal);
610 setOperationAction(ISD::FP_TO_UINT, MVT::v4i32, Legal);
611 setOperationAction(ISD::SINT_TO_FP, MVT::v4i32, Legal);
612 setOperationAction(ISD::UINT_TO_FP, MVT::v4i32, Legal);
613 setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
614 setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
615 setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
616 setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Legal);
617
618 addRegisterClass(MVT::v4f32, &PPC::VRRCRegClass);
619 addRegisterClass(MVT::v4i32, &PPC::VRRCRegClass);
620 addRegisterClass(MVT::v8i16, &PPC::VRRCRegClass);
621 addRegisterClass(MVT::v16i8, &PPC::VRRCRegClass);
622
623 setOperationAction(ISD::MUL, MVT::v4f32, Legal);
624 setOperationAction(ISD::FMA, MVT::v4f32, Legal);
625
626 if (TM.Options.UnsafeFPMath || Subtarget.hasVSX()) {
627 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
628 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
629 }
630
631 if (Subtarget.hasP8Altivec())
632 setOperationAction(ISD::MUL, MVT::v4i32, Legal);
633 else
634 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
635
636 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
637 setOperationAction(ISD::MUL, MVT::v16i8, Custom);
638
639 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Custom);
640 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i32, Custom);
641
642 setOperationAction(ISD::BUILD_VECTOR, MVT::v16i8, Custom);
643 setOperationAction(ISD::BUILD_VECTOR, MVT::v8i16, Custom);
644 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i32, Custom);
645 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
646
647 // Altivec does not contain unordered floating-point compare instructions
648 setCondCodeAction(ISD::SETUO, MVT::v4f32, Expand);
649 setCondCodeAction(ISD::SETUEQ, MVT::v4f32, Expand);
650 setCondCodeAction(ISD::SETO, MVT::v4f32, Expand);
651 setCondCodeAction(ISD::SETONE, MVT::v4f32, Expand);
652
653 if (Subtarget.hasVSX()) {
654 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2f64, Legal);
655 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Legal);
656 if (Subtarget.hasP8Vector()) {
657 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Legal);
658 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Legal);
659 }
660 if (Subtarget.hasDirectMove() && isPPC64) {
661 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Legal);
662 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Legal);
663 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i32, Legal);
664 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v2i64, Legal);
665 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v16i8, Legal);
666 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v8i16, Legal);
667 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4i32, Legal);
668 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Legal);
669 }
670 setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Legal);
671
672 setOperationAction(ISD::FFLOOR, MVT::v2f64, Legal);
673 setOperationAction(ISD::FCEIL, MVT::v2f64, Legal);
674 setOperationAction(ISD::FTRUNC, MVT::v2f64, Legal);
675 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Legal);
676 setOperationAction(ISD::FROUND, MVT::v2f64, Legal);
677
678 setOperationAction(ISD::FROUND, MVT::v4f32, Legal);
679
680 setOperationAction(ISD::MUL, MVT::v2f64, Legal);
681 setOperationAction(ISD::FMA, MVT::v2f64, Legal);
682
683 setOperationAction(ISD::FDIV, MVT::v2f64, Legal);
684 setOperationAction(ISD::FSQRT, MVT::v2f64, Legal);
685
686 setOperationAction(ISD::VSELECT, MVT::v16i8, Legal);
687 setOperationAction(ISD::VSELECT, MVT::v8i16, Legal);
688 setOperationAction(ISD::VSELECT, MVT::v4i32, Legal);
689 setOperationAction(ISD::VSELECT, MVT::v4f32, Legal);
690 setOperationAction(ISD::VSELECT, MVT::v2f64, Legal);
691
692 // Share the Altivec comparison restrictions.
693 setCondCodeAction(ISD::SETUO, MVT::v2f64, Expand);
694 setCondCodeAction(ISD::SETUEQ, MVT::v2f64, Expand);
695 setCondCodeAction(ISD::SETO, MVT::v2f64, Expand);
696 setCondCodeAction(ISD::SETONE, MVT::v2f64, Expand);
697
698 setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
699 setOperationAction(ISD::STORE, MVT::v2f64, Legal);
700
701 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Legal);
702
703 if (Subtarget.hasP8Vector())
704 addRegisterClass(MVT::f32, &PPC::VSSRCRegClass);
705
706 addRegisterClass(MVT::f64, &PPC::VSFRCRegClass);
707
708 addRegisterClass(MVT::v4i32, &PPC::VSRCRegClass);
709 addRegisterClass(MVT::v4f32, &PPC::VSRCRegClass);
710 addRegisterClass(MVT::v2f64, &PPC::VSRCRegClass);
711
712 if (Subtarget.hasP8Altivec()) {
713 setOperationAction(ISD::SHL, MVT::v2i64, Legal);
714 setOperationAction(ISD::SRA, MVT::v2i64, Legal);
715 setOperationAction(ISD::SRL, MVT::v2i64, Legal);
716
717 // 128 bit shifts can be accomplished via 3 instructions for SHL and
718 // SRL, but not for SRA because of the instructions available:
719 // VS{RL} and VS{RL}O. However due to direct move costs, it's not worth
720 // doing
721 setOperationAction(ISD::SHL, MVT::v1i128, Expand);
722 setOperationAction(ISD::SRL, MVT::v1i128, Expand);
723 setOperationAction(ISD::SRA, MVT::v1i128, Expand);
724
725 setOperationAction(ISD::SETCC, MVT::v2i64, Legal);
726 }
727 else {
728 setOperationAction(ISD::SHL, MVT::v2i64, Expand);
729 setOperationAction(ISD::SRA, MVT::v2i64, Expand);
730 setOperationAction(ISD::SRL, MVT::v2i64, Expand);
731
732 setOperationAction(ISD::SETCC, MVT::v2i64, Custom);
733
734 // VSX v2i64 only supports non-arithmetic operations.
735 setOperationAction(ISD::ADD, MVT::v2i64, Expand);
736 setOperationAction(ISD::SUB, MVT::v2i64, Expand);
737 }
738
739 setOperationAction(ISD::LOAD, MVT::v2i64, Promote);
740 AddPromotedToType (ISD::LOAD, MVT::v2i64, MVT::v2f64);
741 setOperationAction(ISD::STORE, MVT::v2i64, Promote);
742 AddPromotedToType (ISD::STORE, MVT::v2i64, MVT::v2f64);
743
744 setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Legal);
745
746 setOperationAction(ISD::SINT_TO_FP, MVT::v2i64, Legal);
747 setOperationAction(ISD::UINT_TO_FP, MVT::v2i64, Legal);
748 setOperationAction(ISD::FP_TO_SINT, MVT::v2i64, Legal);
749 setOperationAction(ISD::FP_TO_UINT, MVT::v2i64, Legal);
750
751 // Vector operation legalization checks the result type of
752 // SIGN_EXTEND_INREG, overall legalization checks the inner type.
753 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i64, Legal);
754 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i32, Legal);
755 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i16, Custom);
756 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::v2i8, Custom);
757
758 setOperationAction(ISD::FNEG, MVT::v4f32, Legal);
759 setOperationAction(ISD::FNEG, MVT::v2f64, Legal);
760 setOperationAction(ISD::FABS, MVT::v4f32, Legal);
761 setOperationAction(ISD::FABS, MVT::v2f64, Legal);
762
763 if (Subtarget.hasDirectMove())
764 setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
765 setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
766
767 addRegisterClass(MVT::v2i64, &PPC::VSRCRegClass);
768 }
769
770 if (Subtarget.hasP8Altivec()) {
771 addRegisterClass(MVT::v2i64, &PPC::VRRCRegClass);
772 addRegisterClass(MVT::v1i128, &PPC::VRRCRegClass);
773 }
774
775 if (Subtarget.hasP9Vector()) {
776 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
777 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
778
779 // 128 bit shifts can be accomplished via 3 instructions for SHL and
780 // SRL, but not for SRA because of the instructions available:
781 // VS{RL} and VS{RL}O.
782 setOperationAction(ISD::SHL, MVT::v1i128, Legal);
783 setOperationAction(ISD::SRL, MVT::v1i128, Legal);
784 setOperationAction(ISD::SRA, MVT::v1i128, Expand);
785 }
786
787 if (Subtarget.hasP9Altivec()) {
788 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
789 setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v16i8, Custom);
790 }
791 }
792
793 if (Subtarget.hasQPX()) {
794 setOperationAction(ISD::FADD, MVT::v4f64, Legal);
795 setOperationAction(ISD::FSUB, MVT::v4f64, Legal);
796 setOperationAction(ISD::FMUL, MVT::v4f64, Legal);
797 setOperationAction(ISD::FREM, MVT::v4f64, Expand);
798
799 setOperationAction(ISD::FCOPYSIGN, MVT::v4f64, Legal);
800 setOperationAction(ISD::FGETSIGN, MVT::v4f64, Expand);
801
802 setOperationAction(ISD::LOAD , MVT::v4f64, Custom);
803 setOperationAction(ISD::STORE , MVT::v4f64, Custom);
804
805 setTruncStoreAction(MVT::v4f64, MVT::v4f32, Custom);
806 setLoadExtAction(ISD::EXTLOAD, MVT::v4f64, MVT::v4f32, Custom);
807
808 if (!Subtarget.useCRBits())
809 setOperationAction(ISD::SELECT, MVT::v4f64, Expand);
810 setOperationAction(ISD::VSELECT, MVT::v4f64, Legal);
811
812 setOperationAction(ISD::EXTRACT_VECTOR_ELT , MVT::v4f64, Legal);
813 setOperationAction(ISD::INSERT_VECTOR_ELT , MVT::v4f64, Expand);
814 setOperationAction(ISD::CONCAT_VECTORS , MVT::v4f64, Expand);
815 setOperationAction(ISD::EXTRACT_SUBVECTOR , MVT::v4f64, Expand);
816 setOperationAction(ISD::VECTOR_SHUFFLE , MVT::v4f64, Custom);
817 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f64, Legal);
818 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f64, Custom);
819
820 setOperationAction(ISD::FP_TO_SINT , MVT::v4f64, Legal);
821 setOperationAction(ISD::FP_TO_UINT , MVT::v4f64, Expand);
822
823 setOperationAction(ISD::FP_ROUND , MVT::v4f32, Legal);
824 setOperationAction(ISD::FP_ROUND_INREG , MVT::v4f32, Expand);
825 setOperationAction(ISD::FP_EXTEND, MVT::v4f64, Legal);
826
827 setOperationAction(ISD::FNEG , MVT::v4f64, Legal);
828 setOperationAction(ISD::FABS , MVT::v4f64, Legal);
829 setOperationAction(ISD::FSIN , MVT::v4f64, Expand);
830 setOperationAction(ISD::FCOS , MVT::v4f64, Expand);
831 setOperationAction(ISD::FPOW , MVT::v4f64, Expand);
832 setOperationAction(ISD::FLOG , MVT::v4f64, Expand);
833 setOperationAction(ISD::FLOG2 , MVT::v4f64, Expand);
834 setOperationAction(ISD::FLOG10 , MVT::v4f64, Expand);
835 setOperationAction(ISD::FEXP , MVT::v4f64, Expand);
836 setOperationAction(ISD::FEXP2 , MVT::v4f64, Expand);
837
838 setOperationAction(ISD::FMINNUM, MVT::v4f64, Legal);
839 setOperationAction(ISD::FMAXNUM, MVT::v4f64, Legal);
840
841 setIndexedLoadAction(ISD::PRE_INC, MVT::v4f64, Legal);
842 setIndexedStoreAction(ISD::PRE_INC, MVT::v4f64, Legal);
843
844 addRegisterClass(MVT::v4f64, &PPC::QFRCRegClass);
845
846 setOperationAction(ISD::FADD, MVT::v4f32, Legal);
847 setOperationAction(ISD::FSUB, MVT::v4f32, Legal);
848 setOperationAction(ISD::FMUL, MVT::v4f32, Legal);
849 setOperationAction(ISD::FREM, MVT::v4f32, Expand);
850
851 setOperationAction(ISD::FCOPYSIGN, MVT::v4f32, Legal);
852 setOperationAction(ISD::FGETSIGN, MVT::v4f32, Expand);
853
854 setOperationAction(ISD::LOAD , MVT::v4f32, Custom);
855 setOperationAction(ISD::STORE , MVT::v4f32, Custom);
856
857 if (!Subtarget.useCRBits())
858 setOperationAction(ISD::SELECT, MVT::v4f32, Expand);
859 setOperationAction(ISD::VSELECT, MVT::v4f32, Legal);
860
861 setOperationAction(ISD::EXTRACT_VECTOR_ELT , MVT::v4f32, Legal);
862 setOperationAction(ISD::INSERT_VECTOR_ELT , MVT::v4f32, Expand);
863 setOperationAction(ISD::CONCAT_VECTORS , MVT::v4f32, Expand);
864 setOperationAction(ISD::EXTRACT_SUBVECTOR , MVT::v4f32, Expand);
865 setOperationAction(ISD::VECTOR_SHUFFLE , MVT::v4f32, Custom);
866 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Legal);
867 setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
868
869 setOperationAction(ISD::FP_TO_SINT , MVT::v4f32, Legal);
870 setOperationAction(ISD::FP_TO_UINT , MVT::v4f32, Expand);
871
872 setOperationAction(ISD::FNEG , MVT::v4f32, Legal);
873 setOperationAction(ISD::FABS , MVT::v4f32, Legal);
874 setOperationAction(ISD::FSIN , MVT::v4f32, Expand);
875 setOperationAction(ISD::FCOS , MVT::v4f32, Expand);
876 setOperationAction(ISD::FPOW , MVT::v4f32, Expand);
877 setOperationAction(ISD::FLOG , MVT::v4f32, Expand);
878 setOperationAction(ISD::FLOG2 , MVT::v4f32, Expand);
879 setOperationAction(ISD::FLOG10 , MVT::v4f32, Expand);
880 setOperationAction(ISD::FEXP , MVT::v4f32, Expand);
881 setOperationAction(ISD::FEXP2 , MVT::v4f32, Expand);
882
883 setOperationAction(ISD::FMINNUM, MVT::v4f32, Legal);
884 setOperationAction(ISD::FMAXNUM, MVT::v4f32, Legal);
885
886 setIndexedLoadAction(ISD::PRE_INC, MVT::v4f32, Legal);
887 setIndexedStoreAction(ISD::PRE_INC, MVT::v4f32, Legal);
888
889 addRegisterClass(MVT::v4f32, &PPC::QSRCRegClass);
890
891 setOperationAction(ISD::AND , MVT::v4i1, Legal);
892 setOperationAction(ISD::OR , MVT::v4i1, Legal);
893 setOperationAction(ISD::XOR , MVT::v4i1, Legal);
894
895 if (!Subtarget.useCRBits())
896 setOperationAction(ISD::SELECT, MVT::v4i1, Expand);
897 setOperationAction(ISD::VSELECT, MVT::v4i1, Legal);
898
899 setOperationAction(ISD::LOAD , MVT::v4i1, Custom);
900 setOperationAction(ISD::STORE , MVT::v4i1, Custom);
901
902 setOperationAction(ISD::EXTRACT_VECTOR_ELT , MVT::v4i1, Custom);
903 setOperationAction(ISD::INSERT_VECTOR_ELT , MVT::v4i1, Expand);
904 setOperationAction(ISD::CONCAT_VECTORS , MVT::v4i1, Expand);
905 setOperationAction(ISD::EXTRACT_SUBVECTOR , MVT::v4i1, Expand);
906 setOperationAction(ISD::VECTOR_SHUFFLE , MVT::v4i1, Custom);
907 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4i1, Expand);
908 setOperationAction(ISD::BUILD_VECTOR, MVT::v4i1, Custom);
909
910 setOperationAction(ISD::SINT_TO_FP, MVT::v4i1, Custom);
911 setOperationAction(ISD::UINT_TO_FP, MVT::v4i1, Custom);
912
913 addRegisterClass(MVT::v4i1, &PPC::QBRCRegClass);
914
915 setOperationAction(ISD::FFLOOR, MVT::v4f64, Legal);
916 setOperationAction(ISD::FCEIL, MVT::v4f64, Legal);
917 setOperationAction(ISD::FTRUNC, MVT::v4f64, Legal);
918 setOperationAction(ISD::FROUND, MVT::v4f64, Legal);
919
920 setOperationAction(ISD::FFLOOR, MVT::v4f32, Legal);
921 setOperationAction(ISD::FCEIL, MVT::v4f32, Legal);
922 setOperationAction(ISD::FTRUNC, MVT::v4f32, Legal);
923 setOperationAction(ISD::FROUND, MVT::v4f32, Legal);
924
925 setOperationAction(ISD::FNEARBYINT, MVT::v4f64, Expand);
926 setOperationAction(ISD::FNEARBYINT, MVT::v4f32, Expand);
927
928 // These need to set FE_INEXACT, and so cannot be vectorized here.
929 setOperationAction(ISD::FRINT, MVT::v4f64, Expand);
930 setOperationAction(ISD::FRINT, MVT::v4f32, Expand);
931
932 if (TM.Options.UnsafeFPMath) {
933 setOperationAction(ISD::FDIV, MVT::v4f64, Legal);
934 setOperationAction(ISD::FSQRT, MVT::v4f64, Legal);
935
936 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
937 setOperationAction(ISD::FSQRT, MVT::v4f32, Legal);
938 } else {
939 setOperationAction(ISD::FDIV, MVT::v4f64, Expand);
940 setOperationAction(ISD::FSQRT, MVT::v4f64, Expand);
941
942 setOperationAction(ISD::FDIV, MVT::v4f32, Expand);
943 setOperationAction(ISD::FSQRT, MVT::v4f32, Expand);
944 }
945 }
946
947 if (Subtarget.has64BitSupport())
948 setOperationAction(ISD::PREFETCH, MVT::Other, Legal);
949
950 setOperationAction(ISD::READCYCLECOUNTER, MVT::i64, isPPC64 ? Legal : Custom);
951
952 if (!isPPC64) {
953 setOperationAction(ISD::ATOMIC_LOAD, MVT::i64, Expand);
954 setOperationAction(ISD::ATOMIC_STORE, MVT::i64, Expand);
955 }
956
957 setBooleanContents(ZeroOrOneBooleanContent);
958
959 if (Subtarget.hasAltivec()) {
960 // Altivec instructions set fields to all zeros or all ones.
961 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
962 }
963
964 if (!isPPC64) {
965 // These libcalls are not available in 32-bit.
966 setLibcallName(RTLIB::SHL_I128, nullptr);
967 setLibcallName(RTLIB::SRL_I128, nullptr);
968 setLibcallName(RTLIB::SRA_I128, nullptr);
969 }
970
971 setStackPointerRegisterToSaveRestore(isPPC64 ? PPC::X1 : PPC::R1);
972
973 // We have target-specific dag combine patterns for the following nodes:
974 setTargetDAGCombine(ISD::SHL);
975 setTargetDAGCombine(ISD::SRA);
976 setTargetDAGCombine(ISD::SRL);
977 setTargetDAGCombine(ISD::SINT_TO_FP);
978 setTargetDAGCombine(ISD::BUILD_VECTOR);
979 if (Subtarget.hasFPCVT())
980 setTargetDAGCombine(ISD::UINT_TO_FP);
981 setTargetDAGCombine(ISD::LOAD);
982 setTargetDAGCombine(ISD::STORE);
983 setTargetDAGCombine(ISD::BR_CC);
984 if (Subtarget.useCRBits())
985 setTargetDAGCombine(ISD::BRCOND);
986 setTargetDAGCombine(ISD::BSWAP);
987 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
988 setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
989 setTargetDAGCombine(ISD::INTRINSIC_VOID);
990
991 setTargetDAGCombine(ISD::SIGN_EXTEND);
992 setTargetDAGCombine(ISD::ZERO_EXTEND);
993 setTargetDAGCombine(ISD::ANY_EXTEND);
994
995 if (Subtarget.useCRBits()) {
996 setTargetDAGCombine(ISD::TRUNCATE);
997 setTargetDAGCombine(ISD::SETCC);
998 setTargetDAGCombine(ISD::SELECT_CC);
999 }
1000
1001 // Use reciprocal estimates.
1002 if (TM.Options.UnsafeFPMath) {
1003 setTargetDAGCombine(ISD::FDIV);
1004 setTargetDAGCombine(ISD::FSQRT);
1005 }
1006
1007 // Darwin long double math library functions have $LDBL128 appended.
1008 if (Subtarget.isDarwin()) {
1009 setLibcallName(RTLIB::COS_PPCF128, "cosl$LDBL128");
1010 setLibcallName(RTLIB::POW_PPCF128, "powl$LDBL128");
1011 setLibcallName(RTLIB::REM_PPCF128, "fmodl$LDBL128");
1012 setLibcallName(RTLIB::SIN_PPCF128, "sinl$LDBL128");
1013 setLibcallName(RTLIB::SQRT_PPCF128, "sqrtl$LDBL128");
1014 setLibcallName(RTLIB::LOG_PPCF128, "logl$LDBL128");
1015 setLibcallName(RTLIB::LOG2_PPCF128, "log2l$LDBL128");
1016 setLibcallName(RTLIB::LOG10_PPCF128, "log10l$LDBL128");
1017 setLibcallName(RTLIB::EXP_PPCF128, "expl$LDBL128");
1018 setLibcallName(RTLIB::EXP2_PPCF128, "exp2l$LDBL128");
1019 }
1020
1021 // With 32 condition bits, we don't need to sink (and duplicate) compares
1022 // aggressively in CodeGenPrep.
1023 if (Subtarget.useCRBits()) {
1024 setHasMultipleConditionRegisters();
1025 setJumpIsExpensive();
1026 }
1027
1028 setMinFunctionAlignment(2);
1029 if (Subtarget.isDarwin())
1030 setPrefFunctionAlignment(4);
1031
1032 switch (Subtarget.getDarwinDirective()) {
1033 default: break;
1034 case PPC::DIR_970:
1035 case PPC::DIR_A2:
1036 case PPC::DIR_E500mc:
1037 case PPC::DIR_E5500:
1038 case PPC::DIR_PWR4:
1039 case PPC::DIR_PWR5:
1040 case PPC::DIR_PWR5X:
1041 case PPC::DIR_PWR6:
1042 case PPC::DIR_PWR6X:
1043 case PPC::DIR_PWR7:
1044 case PPC::DIR_PWR8:
1045 case PPC::DIR_PWR9:
1046 setPrefFunctionAlignment(4);
1047 setPrefLoopAlignment(4);
1048 break;
1049 }
1050
1051 if (Subtarget.enableMachineScheduler())
1052 setSchedulingPreference(Sched::Source);
1053 else
1054 setSchedulingPreference(Sched::Hybrid);
1055
1056 computeRegisterProperties(STI.getRegisterInfo());
1057
1058 // The Freescale cores do better with aggressive inlining of memcpy and
1059 // friends. GCC uses same threshold of 128 bytes (= 32 word stores).
1060 if (Subtarget.getDarwinDirective() == PPC::DIR_E500mc ||
1061 Subtarget.getDarwinDirective() == PPC::DIR_E5500) {
1062 MaxStoresPerMemset = 32;
1063 MaxStoresPerMemsetOptSize = 16;
1064 MaxStoresPerMemcpy = 32;
1065 MaxStoresPerMemcpyOptSize = 8;
1066 MaxStoresPerMemmove = 32;
1067 MaxStoresPerMemmoveOptSize = 8;
1068 } else if (Subtarget.getDarwinDirective() == PPC::DIR_A2) {
1069 // The A2 also benefits from (very) aggressive inlining of memcpy and
1070 // friends. The overhead of a the function call, even when warm, can be
1071 // over one hundred cycles.
1072 MaxStoresPerMemset = 128;
1073 MaxStoresPerMemcpy = 128;
1074 MaxStoresPerMemmove = 128;
1075 MaxLoadsPerMemcmp = 128;
1076 } else {
1077 MaxLoadsPerMemcmp = 8;
1078 MaxLoadsPerMemcmpOptSize = 4;
1079 }
1080}
1081
1082/// getMaxByValAlign - Helper for getByValTypeAlignment to determine
1083/// the desired ByVal argument alignment.
1084static void getMaxByValAlign(Type *Ty, unsigned &MaxAlign,
1085 unsigned MaxMaxAlign) {
1086 if (MaxAlign == MaxMaxAlign)
1087 return;
1088 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
1089 if (MaxMaxAlign >= 32 && VTy->getBitWidth() >= 256)
1090 MaxAlign = 32;
1091 else if (VTy->getBitWidth() >= 128 && MaxAlign < 16)
1092 MaxAlign = 16;
1093 } else if (ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
1094 unsigned EltAlign = 0;
1095 getMaxByValAlign(ATy->getElementType(), EltAlign, MaxMaxAlign);
1096 if (EltAlign > MaxAlign)
1097 MaxAlign = EltAlign;
1098 } else if (StructType *STy = dyn_cast<StructType>(Ty)) {
1099 for (auto *EltTy : STy->elements()) {
1100 unsigned EltAlign = 0;
1101 getMaxByValAlign(EltTy, EltAlign, MaxMaxAlign);
1102 if (EltAlign > MaxAlign)
1103 MaxAlign = EltAlign;
1104 if (MaxAlign == MaxMaxAlign)
1105 break;
1106 }
1107 }
1108}
1109
1110/// getByValTypeAlignment - Return the desired alignment for ByVal aggregate
1111/// function arguments in the caller parameter area.
1112unsigned PPCTargetLowering::getByValTypeAlignment(Type *Ty,
1113 const DataLayout &DL) const {
1114 // Darwin passes everything on 4 byte boundary.
1115 if (Subtarget.isDarwin())
1116 return 4;
1117
1118 // 16byte and wider vectors are passed on 16byte boundary.
1119 // The rest is 8 on PPC64 and 4 on PPC32 boundary.
1120 unsigned Align = Subtarget.isPPC64() ? 8 : 4;
1121 if (Subtarget.hasAltivec() || Subtarget.hasQPX())
1122 getMaxByValAlign(Ty, Align, Subtarget.hasQPX() ? 32 : 16);
1123 return Align;
1124}
1125
1126bool PPCTargetLowering::useSoftFloat() const {
1127 return Subtarget.useSoftFloat();
1128}
1129
1130const char *PPCTargetLowering::getTargetNodeName(unsigned Opcode) const {
1131 switch ((PPCISD::NodeType)Opcode) {
1132 case PPCISD::FIRST_NUMBER: break;
1133 case PPCISD::FSEL: return "PPCISD::FSEL";
1134 case PPCISD::FCFID: return "PPCISD::FCFID";
1135 case PPCISD::FCFIDU: return "PPCISD::FCFIDU";
1136 case PPCISD::FCFIDS: return "PPCISD::FCFIDS";
1137 case PPCISD::FCFIDUS: return "PPCISD::FCFIDUS";
1138 case PPCISD::FCTIDZ: return "PPCISD::FCTIDZ";
1139 case PPCISD::FCTIWZ: return "PPCISD::FCTIWZ";
1140 case PPCISD::FCTIDUZ: return "PPCISD::FCTIDUZ";
1141 case PPCISD::FCTIWUZ: return "PPCISD::FCTIWUZ";
1142 case PPCISD::FRE: return "PPCISD::FRE";
1143 case PPCISD::FRSQRTE: return "PPCISD::FRSQRTE";
1144 case PPCISD::STFIWX: return "PPCISD::STFIWX";
1145 case PPCISD::VMADDFP: return "PPCISD::VMADDFP";
1146 case PPCISD::VNMSUBFP: return "PPCISD::VNMSUBFP";
1147 case PPCISD::VPERM: return "PPCISD::VPERM";
1148 case PPCISD::XXSPLT: return "PPCISD::XXSPLT";
1149 case PPCISD::VECINSERT: return "PPCISD::VECINSERT";
1150 case PPCISD::XXREVERSE: return "PPCISD::XXREVERSE";
1151 case PPCISD::XXPERMDI: return "PPCISD::XXPERMDI";
1152 case PPCISD::VECSHL: return "PPCISD::VECSHL";
1153 case PPCISD::CMPB: return "PPCISD::CMPB";
1154 case PPCISD::Hi: return "PPCISD::Hi";
1155 case PPCISD::Lo: return "PPCISD::Lo";
1156 case PPCISD::TOC_ENTRY: return "PPCISD::TOC_ENTRY";
1157 case PPCISD::DYNALLOC: return "PPCISD::DYNALLOC";
1158 case PPCISD::DYNAREAOFFSET: return "PPCISD::DYNAREAOFFSET";
1159 case PPCISD::GlobalBaseReg: return "PPCISD::GlobalBaseReg";
1160 case PPCISD::SRL: return "PPCISD::SRL";
1161 case PPCISD::SRA: return "PPCISD::SRA";
1162 case PPCISD::SHL: return "PPCISD::SHL";
1163 case PPCISD::SRA_ADDZE: return "PPCISD::SRA_ADDZE";
1164 case PPCISD::CALL: return "PPCISD::CALL";
1165 case PPCISD::CALL_NOP: return "PPCISD::CALL_NOP";
1166 case PPCISD::MTCTR: return "PPCISD::MTCTR";
1167 case PPCISD::BCTRL: return "PPCISD::BCTRL";
1168 case PPCISD::BCTRL_LOAD_TOC: return "PPCISD::BCTRL_LOAD_TOC";
1169 case PPCISD::RET_FLAG: return "PPCISD::RET_FLAG";
1170 case PPCISD::READ_TIME_BASE: return "PPCISD::READ_TIME_BASE";
1171 case PPCISD::EH_SJLJ_SETJMP: return "PPCISD::EH_SJLJ_SETJMP";
1172 case PPCISD::EH_SJLJ_LONGJMP: return "PPCISD::EH_SJLJ_LONGJMP";
1173 case PPCISD::MFOCRF: return "PPCISD::MFOCRF";
1174 case PPCISD::MFVSR: return "PPCISD::MFVSR";
1175 case PPCISD::MTVSRA: return "PPCISD::MTVSRA";
1176 case PPCISD::MTVSRZ: return "PPCISD::MTVSRZ";
1177 case PPCISD::SINT_VEC_TO_FP: return "PPCISD::SINT_VEC_TO_FP";
1178 case PPCISD::UINT_VEC_TO_FP: return "PPCISD::UINT_VEC_TO_FP";
1179 case PPCISD::ANDIo_1_EQ_BIT: return "PPCISD::ANDIo_1_EQ_BIT";
1180 case PPCISD::ANDIo_1_GT_BIT: return "PPCISD::ANDIo_1_GT_BIT";
1181 case PPCISD::VCMP: return "PPCISD::VCMP";
1182 case PPCISD::VCMPo: return "PPCISD::VCMPo";
1183 case PPCISD::LBRX: return "PPCISD::LBRX";
1184 case PPCISD::STBRX: return "PPCISD::STBRX";
1185 case PPCISD::LFIWAX: return "PPCISD::LFIWAX";
1186 case PPCISD::LFIWZX: return "PPCISD::LFIWZX";
1187 case PPCISD::LXSIZX: return "PPCISD::LXSIZX";
1188 case PPCISD::STXSIX: return "PPCISD::STXSIX";
1189 case PPCISD::VEXTS: return "PPCISD::VEXTS";
1190 case PPCISD::SExtVElems: return "PPCISD::SExtVElems";
1191 case PPCISD::LXVD2X: return "PPCISD::LXVD2X";
1192 case PPCISD::STXVD2X: return "PPCISD::STXVD2X";
1193 case PPCISD::COND_BRANCH: return "PPCISD::COND_BRANCH";
1194 case PPCISD::BDNZ: return "PPCISD::BDNZ";
1195 case PPCISD::BDZ: return "PPCISD::BDZ";
1196 case PPCISD::MFFS: return "PPCISD::MFFS";
1197 case PPCISD::FADDRTZ: return "PPCISD::FADDRTZ";
1198 case PPCISD::TC_RETURN: return "PPCISD::TC_RETURN";
1199 case PPCISD::CR6SET: return "PPCISD::CR6SET";
1200 case PPCISD::CR6UNSET: return "PPCISD::CR6UNSET";
1201 case PPCISD::PPC32_GOT: return "PPCISD::PPC32_GOT";
1202 case PPCISD::PPC32_PICGOT: return "PPCISD::PPC32_PICGOT";
1203 case PPCISD::ADDIS_GOT_TPREL_HA: return "PPCISD::ADDIS_GOT_TPREL_HA";
1204 case PPCISD::LD_GOT_TPREL_L: return "PPCISD::LD_GOT_TPREL_L";
1205 case PPCISD::ADD_TLS: return "PPCISD::ADD_TLS";
1206 case PPCISD::ADDIS_TLSGD_HA: return "PPCISD::ADDIS_TLSGD_HA";
1207 case PPCISD::ADDI_TLSGD_L: return "PPCISD::ADDI_TLSGD_L";
1208 case PPCISD::GET_TLS_ADDR: return "PPCISD::GET_TLS_ADDR";
1209 case PPCISD::ADDI_TLSGD_L_ADDR: return "PPCISD::ADDI_TLSGD_L_ADDR";
1210 case PPCISD::ADDIS_TLSLD_HA: return "PPCISD::ADDIS_TLSLD_HA";
1211 case PPCISD::ADDI_TLSLD_L: return "PPCISD::ADDI_TLSLD_L";
1212 case PPCISD::GET_TLSLD_ADDR: return "PPCISD::GET_TLSLD_ADDR";
1213 case PPCISD::ADDI_TLSLD_L_ADDR: return "PPCISD::ADDI_TLSLD_L_ADDR";
1214 case PPCISD::ADDIS_DTPREL_HA: return "PPCISD::ADDIS_DTPREL_HA";
1215 case PPCISD::ADDI_DTPREL_L: return "PPCISD::ADDI_DTPREL_L";
1216 case PPCISD::VADD_SPLAT: return "PPCISD::VADD_SPLAT";
1217 case PPCISD::SC: return "PPCISD::SC";
1218 case PPCISD::CLRBHRB: return "PPCISD::CLRBHRB";
1219 case PPCISD::MFBHRBE: return "PPCISD::MFBHRBE";
1220 case PPCISD::RFEBB: return "PPCISD::RFEBB";
1221 case PPCISD::XXSWAPD: return "PPCISD::XXSWAPD";
1222 case PPCISD::SWAP_NO_CHAIN: return "PPCISD::SWAP_NO_CHAIN";
1223 case PPCISD::QVFPERM: return "PPCISD::QVFPERM";
1224 case PPCISD::QVGPCI: return "PPCISD::QVGPCI";
1225 case PPCISD::QVALIGNI: return "PPCISD::QVALIGNI";
1226 case PPCISD::QVESPLATI: return "PPCISD::QVESPLATI";
1227 case PPCISD::QBFLT: return "PPCISD::QBFLT";
1228 case PPCISD::QVLFSb: return "PPCISD::QVLFSb";
1229 }
1230 return nullptr;
1231}
1232
1233EVT PPCTargetLowering::getSetCCResultType(const DataLayout &DL, LLVMContext &C,
1234 EVT VT) const {
1235 if (!VT.isVector())
1236 return Subtarget.useCRBits() ? MVT::i1 : MVT::i32;
1237
1238 if (Subtarget.hasQPX())
1239 return EVT::getVectorVT(C, MVT::i1, VT.getVectorNumElements());
1240
1241 return VT.changeVectorElementTypeToInteger();
1242}
1243
1244bool PPCTargetLowering::enableAggressiveFMAFusion(EVT VT) const {
1245 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1245, __extension__ __PRETTY_FUNCTION__))
;
1246 return true;
1247}
1248
1249//===----------------------------------------------------------------------===//
1250// Node matching predicates, for use by the tblgen matching code.
1251//===----------------------------------------------------------------------===//
1252
1253/// isFloatingPointZero - Return true if this is 0.0 or -0.0.
1254static bool isFloatingPointZero(SDValue Op) {
1255 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
1256 return CFP->getValueAPF().isZero();
1257 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
1258 // Maybe this has already been legalized into the constant pool?
1259 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Op.getOperand(1)))
1260 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
1261 return CFP->getValueAPF().isZero();
1262 }
1263 return false;
1264}
1265
1266/// isConstantOrUndef - Op is either an undef node or a ConstantSDNode. Return
1267/// true if Op is undef or if it matches the specified value.
1268static bool isConstantOrUndef(int Op, int Val) {
1269 return Op < 0 || Op == Val;
1270}
1271
1272/// isVPKUHUMShuffleMask - Return true if this is the shuffle mask for a
1273/// VPKUHUM instruction.
1274/// The ShuffleKind distinguishes between big-endian operations with
1275/// two different inputs (0), either-endian operations with two identical
1276/// inputs (1), and little-endian operations with two different inputs (2).
1277/// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
1278bool PPC::isVPKUHUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
1279 SelectionDAG &DAG) {
1280 bool IsLE = DAG.getDataLayout().isLittleEndian();
1281 if (ShuffleKind == 0) {
1282 if (IsLE)
1283 return false;
1284 for (unsigned i = 0; i != 16; ++i)
1285 if (!isConstantOrUndef(N->getMaskElt(i), i*2+1))
1286 return false;
1287 } else if (ShuffleKind == 2) {
1288 if (!IsLE)
1289 return false;
1290 for (unsigned i = 0; i != 16; ++i)
1291 if (!isConstantOrUndef(N->getMaskElt(i), i*2))
1292 return false;
1293 } else if (ShuffleKind == 1) {
1294 unsigned j = IsLE ? 0 : 1;
1295 for (unsigned i = 0; i != 8; ++i)
1296 if (!isConstantOrUndef(N->getMaskElt(i), i*2+j) ||
1297 !isConstantOrUndef(N->getMaskElt(i+8), i*2+j))
1298 return false;
1299 }
1300 return true;
1301}
1302
1303/// isVPKUWUMShuffleMask - Return true if this is the shuffle mask for a
1304/// VPKUWUM instruction.
1305/// The ShuffleKind distinguishes between big-endian operations with
1306/// two different inputs (0), either-endian operations with two identical
1307/// inputs (1), and little-endian operations with two different inputs (2).
1308/// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
1309bool PPC::isVPKUWUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
1310 SelectionDAG &DAG) {
1311 bool IsLE = DAG.getDataLayout().isLittleEndian();
1312 if (ShuffleKind == 0) {
1313 if (IsLE)
1314 return false;
1315 for (unsigned i = 0; i != 16; i += 2)
1316 if (!isConstantOrUndef(N->getMaskElt(i ), i*2+2) ||
1317 !isConstantOrUndef(N->getMaskElt(i+1), i*2+3))
1318 return false;
1319 } else if (ShuffleKind == 2) {
1320 if (!IsLE)
1321 return false;
1322 for (unsigned i = 0; i != 16; i += 2)
1323 if (!isConstantOrUndef(N->getMaskElt(i ), i*2) ||
1324 !isConstantOrUndef(N->getMaskElt(i+1), i*2+1))
1325 return false;
1326 } else if (ShuffleKind == 1) {
1327 unsigned j = IsLE ? 0 : 2;
1328 for (unsigned i = 0; i != 8; i += 2)
1329 if (!isConstantOrUndef(N->getMaskElt(i ), i*2+j) ||
1330 !isConstantOrUndef(N->getMaskElt(i+1), i*2+j+1) ||
1331 !isConstantOrUndef(N->getMaskElt(i+8), i*2+j) ||
1332 !isConstantOrUndef(N->getMaskElt(i+9), i*2+j+1))
1333 return false;
1334 }
1335 return true;
1336}
1337
1338/// isVPKUDUMShuffleMask - Return true if this is the shuffle mask for a
1339/// VPKUDUM instruction, AND the VPKUDUM instruction exists for the
1340/// current subtarget.
1341///
1342/// The ShuffleKind distinguishes between big-endian operations with
1343/// two different inputs (0), either-endian operations with two identical
1344/// inputs (1), and little-endian operations with two different inputs (2).
1345/// For the latter, the input operands are swapped (see PPCInstrAltivec.td).
1346bool PPC::isVPKUDUMShuffleMask(ShuffleVectorSDNode *N, unsigned ShuffleKind,
1347 SelectionDAG &DAG) {
1348 const PPCSubtarget& Subtarget =
1349 static_cast<const PPCSubtarget&>(DAG.getSubtarget());
1350 if (!Subtarget.hasP8Vector())
1351 return false;
1352
1353 bool IsLE = DAG.getDataLayout().isLittleEndian();
1354 if (ShuffleKind == 0) {
1355 if (IsLE)
1356 return false;
1357 for (unsigned i = 0; i != 16; i += 4)
1358 if (!isConstantOrUndef(N->getMaskElt(i ), i*2+4) ||
1359 !isConstantOrUndef(N->getMaskElt(i+1), i*2+5) ||
1360 !isConstantOrUndef(N->getMaskElt(i+2), i*2+6) ||
1361 !isConstantOrUndef(N->getMaskElt(i+3), i*2+7))
1362 return false;
1363 } else if (ShuffleKind == 2) {
1364 if (!IsLE)
1365 return false;
1366 for (unsigned i = 0; i != 16; i += 4)
1367 if (!isConstantOrUndef(N->getMaskElt(i ), i*2) ||
1368 !isConstantOrUndef(N->getMaskElt(i+1), i*2+1) ||
1369 !isConstantOrUndef(N->getMaskElt(i+2), i*2+2) ||
1370 !isConstantOrUndef(N->getMaskElt(i+3), i*2+3))
1371 return false;
1372 } else if (ShuffleKind == 1) {
1373 unsigned j = IsLE ? 0 : 4;
1374 for (unsigned i = 0; i != 8; i += 4)
1375 if (!isConstantOrUndef(N->getMaskElt(i ), i*2+j) ||
1376 !isConstantOrUndef(N->getMaskElt(i+1), i*2+j+1) ||
1377 !isConstantOrUndef(N->getMaskElt(i+2), i*2+j+2) ||
1378 !isConstantOrUndef(N->getMaskElt(i+3), i*2+j+3) ||
1379 !isConstantOrUndef(N->getMaskElt(i+8), i*2+j) ||
1380 !isConstantOrUndef(N->getMaskElt(i+9), i*2+j+1) ||
1381 !isConstantOrUndef(N->getMaskElt(i+10), i*2+j+2) ||
1382 !isConstantOrUndef(N->getMaskElt(i+11), i*2+j+3))
1383 return false;
1384 }
1385 return true;
1386}
1387
1388/// isVMerge - Common function, used to match vmrg* shuffles.
1389///
1390static bool isVMerge(ShuffleVectorSDNode *N, unsigned UnitSize,
1391 unsigned LHSStart, unsigned RHSStart) {
1392 if (N->getValueType(0) != MVT::v16i8)
1393 return false;
1394 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1395, __extension__ __PRETTY_FUNCTION__))
1395 "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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1395, __extension__ __PRETTY_FUNCTION__))
;
1396
1397 for (unsigned i = 0; i != 8/UnitSize; ++i) // Step over units
1398 for (unsigned j = 0; j != UnitSize; ++j) { // Step over bytes within unit
1399 if (!isConstantOrUndef(N->getMaskElt(i*UnitSize*2+j),
1400 LHSStart+j+i*UnitSize) ||
1401 !isConstantOrUndef(N->getMaskElt(i*UnitSize*2+UnitSize+j),
1402 RHSStart+j+i*UnitSize))
1403 return false;
1404 }
1405 return true;
1406}
1407
1408/// isVMRGLShuffleMask - Return true if this is a shuffle mask suitable for
1409/// a VMRGL* instruction with the specified unit size (1,2 or 4 bytes).
1410/// The ShuffleKind distinguishes between big-endian merges with two
1411/// different inputs (0), either-endian merges with two identical inputs (1),
1412/// and little-endian merges with two different inputs (2). For the latter,
1413/// the input operands are swapped (see PPCInstrAltivec.td).
1414bool PPC::isVMRGLShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
1415 unsigned ShuffleKind, SelectionDAG &DAG) {
1416 if (DAG.getDataLayout().isLittleEndian()) {
1417 if (ShuffleKind == 1) // unary
1418 return isVMerge(N, UnitSize, 0, 0);
1419 else if (ShuffleKind == 2) // swapped
1420 return isVMerge(N, UnitSize, 0, 16);
1421 else
1422 return false;
1423 } else {
1424 if (ShuffleKind == 1) // unary
1425 return isVMerge(N, UnitSize, 8, 8);
1426 else if (ShuffleKind == 0) // normal
1427 return isVMerge(N, UnitSize, 8, 24);
1428 else
1429 return false;
1430 }
1431}
1432
1433/// isVMRGHShuffleMask - Return true if this is a shuffle mask suitable for
1434/// a VMRGH* instruction with the specified unit size (1,2 or 4 bytes).
1435/// The ShuffleKind distinguishes between big-endian merges with two
1436/// different inputs (0), either-endian merges with two identical inputs (1),
1437/// and little-endian merges with two different inputs (2). For the latter,
1438/// the input operands are swapped (see PPCInstrAltivec.td).
1439bool PPC::isVMRGHShuffleMask(ShuffleVectorSDNode *N, unsigned UnitSize,
1440 unsigned ShuffleKind, SelectionDAG &DAG) {
1441 if (DAG.getDataLayout().isLittleEndian()) {
1442 if (ShuffleKind == 1) // unary
1443 return isVMerge(N, UnitSize, 8, 8);
1444 else if (ShuffleKind == 2) // swapped
1445 return isVMerge(N, UnitSize, 8, 24);
1446 else
1447 return false;
1448 } else {
1449 if (ShuffleKind == 1) // unary
1450 return isVMerge(N, UnitSize, 0, 0);
1451 else if (ShuffleKind == 0) // normal
1452 return isVMerge(N, UnitSize, 0, 16);
1453 else
1454 return false;
1455 }
1456}
1457
1458/**
1459 * \brief Common function used to match vmrgew and vmrgow shuffles
1460 *
1461 * The indexOffset determines whether to look for even or odd words in
1462 * the shuffle mask. This is based on the of the endianness of the target
1463 * machine.
1464 * - Little Endian:
1465 * - Use offset of 0 to check for odd elements
1466 * - Use offset of 4 to check for even elements
1467 * - Big Endian:
1468 * - Use offset of 0 to check for even elements
1469 * - Use offset of 4 to check for odd elements
1470 * A detailed description of the vector element ordering for little endian and
1471 * big endian can be found at
1472 * http://www.ibm.com/developerworks/library/l-ibm-xl-c-cpp-compiler/index.html
1473 * Targeting your applications - what little endian and big endian IBM XL C/C++
1474 * compiler differences mean to you
1475 *
1476 * The mask to the shuffle vector instruction specifies the indices of the
1477 * elements from the two input vectors to place in the result. The elements are
1478 * numbered in array-access order, starting with the first vector. These vectors
1479 * are always of type v16i8, thus each vector will contain 16 elements of size
1480 * 8. More info on the shuffle vector can be found in the
1481 * http://llvm.org/docs/LangRef.html#shufflevector-instruction
1482 * Language Reference.
1483 *
1484 * The RHSStartValue indicates whether the same input vectors are used (unary)
1485 * or two different input vectors are used, based on the following:
1486 * - If the instruction uses the same vector for both inputs, the range of the
1487 * indices will be 0 to 15. In this case, the RHSStart value passed should
1488 * be 0.
1489 * - If the instruction has two different vectors then the range of the
1490 * indices will be 0 to 31. In this case, the RHSStart value passed should
1491 * be 16 (indices 0-15 specify elements in the first vector while indices 16
1492 * to 31 specify elements in the second vector).
1493 *
1494 * \param[in] N The shuffle vector SD Node to analyze
1495 * \param[in] IndexOffset Specifies whether to look for even or odd elements
1496 * \param[in] RHSStartValue Specifies the starting index for the righthand input
1497 * vector to the shuffle_vector instruction
1498 * \return true iff this shuffle vector represents an even or odd word merge
1499 */
1500static bool isVMerge(ShuffleVectorSDNode *N, unsigned IndexOffset,
1501 unsigned RHSStartValue) {
1502 if (N->getValueType(0) != MVT::v16i8)
1503 return false;
1504
1505 for (unsigned i = 0; i < 2; ++i)
1506 for (unsigned j = 0; j < 4; ++j)
1507 if (!isConstantOrUndef(N->getMaskElt(i*4+j),
1508 i*RHSStartValue+j+IndexOffset) ||
1509 !isConstantOrUndef(N->getMaskElt(i*4+j+8),
1510 i*RHSStartValue+j+IndexOffset+8))
1511 return false;
1512 return true;
1513}
1514
1515/**
1516 * \brief Determine if the specified shuffle mask is suitable for the vmrgew or
1517 * vmrgow instructions.
1518 *
1519 * \param[in] N The shuffle vector SD Node to analyze
1520 * \param[in] CheckEven Check for an even merge (true) or an odd merge (false)
1521 * \param[in] ShuffleKind Identify the type of merge:
1522 * - 0 = big-endian merge with two different inputs;
1523 * - 1 = either-endian merge with two identical inputs;
1524 * - 2 = little-endian merge with two different inputs (inputs are swapped for
1525 * little-endian merges).
1526 * \param[in] DAG The current SelectionDAG
1527 * \return true iff this shuffle mask
1528 */
1529bool PPC::isVMRGEOShuffleMask(ShuffleVectorSDNode *N, bool CheckEven,
1530 unsigned ShuffleKind, SelectionDAG &DAG) {
1531 if (DAG.getDataLayout().isLittleEndian()) {
1532 unsigned indexOffset = CheckEven ? 4 : 0;
1533 if (ShuffleKind == 1) // Unary
1534 return isVMerge(N, indexOffset, 0);
1535 else if (ShuffleKind == 2) // swapped
1536 return isVMerge(N, indexOffset, 16);
1537 else
1538 return false;
1539 }
1540 else {
1541 unsigned indexOffset = CheckEven ? 0 : 4;
1542 if (ShuffleKind == 1) // Unary
1543 return isVMerge(N, indexOffset, 0);
1544 else if (ShuffleKind == 0) // Normal
1545 return isVMerge(N, indexOffset, 16);
1546 else
1547 return false;
1548 }
1549 return false;
1550}
1551
1552/// isVSLDOIShuffleMask - If this is a vsldoi shuffle mask, return the shift
1553/// amount, otherwise return -1.
1554/// The ShuffleKind distinguishes between big-endian operations with two
1555/// different inputs (0), either-endian operations with two identical inputs
1556/// (1), and little-endian operations with two different inputs (2). For the
1557/// latter, the input operands are swapped (see PPCInstrAltivec.td).
1558int PPC::isVSLDOIShuffleMask(SDNode *N, unsigned ShuffleKind,
1559 SelectionDAG &DAG) {
1560 if (N->getValueType(0) != MVT::v16i8)
1561 return -1;
1562
1563 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
1564
1565 // Find the first non-undef value in the shuffle mask.
1566 unsigned i;
1567 for (i = 0; i != 16 && SVOp->getMaskElt(i) < 0; ++i)
1568 /*search*/;
1569
1570 if (i == 16) return -1; // all undef.
1571
1572 // Otherwise, check to see if the rest of the elements are consecutively
1573 // numbered from this value.
1574 unsigned ShiftAmt = SVOp->getMaskElt(i);
1575 if (ShiftAmt < i) return -1;
1576
1577 ShiftAmt -= i;
1578 bool isLE = DAG.getDataLayout().isLittleEndian();
1579
1580 if ((ShuffleKind == 0 && !isLE) || (ShuffleKind == 2 && isLE)) {
1581 // Check the rest of the elements to see if they are consecutive.
1582 for (++i; i != 16; ++i)
1583 if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt+i))
1584 return -1;
1585 } else if (ShuffleKind == 1) {
1586 // Check the rest of the elements to see if they are consecutive.
1587 for (++i; i != 16; ++i)
1588 if (!isConstantOrUndef(SVOp->getMaskElt(i), (ShiftAmt+i) & 15))
1589 return -1;
1590 } else
1591 return -1;
1592
1593 if (isLE)
1594 ShiftAmt = 16 - ShiftAmt;
1595
1596 return ShiftAmt;
1597}
1598
1599/// isSplatShuffleMask - Return true if the specified VECTOR_SHUFFLE operand
1600/// specifies a splat of a single element that is suitable for input to
1601/// VSPLTB/VSPLTH/VSPLTW.
1602bool PPC::isSplatShuffleMask(ShuffleVectorSDNode *N, unsigned EltSize) {
1603 assert(N->getValueType(0) == MVT::v16i8 &&(static_cast <bool> (N->getValueType(0) == MVT::v16i8
&& (EltSize == 1 || EltSize == 2 || EltSize == 4)) ?
void (0) : __assert_fail ("N->getValueType(0) == MVT::v16i8 && (EltSize == 1 || EltSize == 2 || EltSize == 4)"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1604, __extension__ __PRETTY_FUNCTION__))
1604 (EltSize == 1 || EltSize == 2 || EltSize == 4))(static_cast <bool> (N->getValueType(0) == MVT::v16i8
&& (EltSize == 1 || EltSize == 2 || EltSize == 4)) ?
void (0) : __assert_fail ("N->getValueType(0) == MVT::v16i8 && (EltSize == 1 || EltSize == 2 || EltSize == 4)"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1604, __extension__ __PRETTY_FUNCTION__))
;
1605
1606 // The consecutive indices need to specify an element, not part of two
1607 // different elements. So abandon ship early if this isn't the case.
1608 if (N->getMaskElt(0) % EltSize != 0)
1609 return false;
1610
1611 // This is a splat operation if each element of the permute is the same, and
1612 // if the value doesn't reference the second vector.
1613 unsigned ElementBase = N->getMaskElt(0);
1614
1615 // FIXME: Handle UNDEF elements too!
1616 if (ElementBase >= 16)
1617 return false;
1618
1619 // Check that the indices are consecutive, in the case of a multi-byte element
1620 // splatted with a v16i8 mask.
1621 for (unsigned i = 1; i != EltSize; ++i)
1622 if (N->getMaskElt(i) < 0 || N->getMaskElt(i) != (int)(i+ElementBase))
1623 return false;
1624
1625 for (unsigned i = EltSize, e = 16; i != e; i += EltSize) {
1626 if (N->getMaskElt(i) < 0) continue;
1627 for (unsigned j = 0; j != EltSize; ++j)
1628 if (N->getMaskElt(i+j) != N->getMaskElt(j))
1629 return false;
1630 }
1631 return true;
1632}
1633
1634/// Check that the mask is shuffling N byte elements. Within each N byte
1635/// element of the mask, the indices could be either in increasing or
1636/// decreasing order as long as they are consecutive.
1637/// \param[in] N the shuffle vector SD Node to analyze
1638/// \param[in] Width the element width in bytes, could be 2/4/8/16 (HalfWord/
1639/// Word/DoubleWord/QuadWord).
1640/// \param[in] StepLen the delta indices number among the N byte element, if
1641/// the mask is in increasing/decreasing order then it is 1/-1.
1642/// \return true iff the mask is shuffling N byte elements.
1643static bool isNByteElemShuffleMask(ShuffleVectorSDNode *N, unsigned Width,
1644 int StepLen) {
1645 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1646, __extension__ __PRETTY_FUNCTION__))
1646 "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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1646, __extension__ __PRETTY_FUNCTION__))
;
1647 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1647, __extension__ __PRETTY_FUNCTION__))
;
1648
1649 unsigned NumOfElem = 16 / Width;
1650 unsigned MaskVal[16]; // Width is never greater than 16
1651 for (unsigned i = 0; i < NumOfElem; ++i) {
1652 MaskVal[0] = N->getMaskElt(i * Width);
1653 if ((StepLen == 1) && (MaskVal[0] % Width)) {
1654 return false;
1655 } else if ((StepLen == -1) && ((MaskVal[0] + 1) % Width)) {
1656 return false;
1657 }
1658
1659 for (unsigned int j = 1; j < Width; ++j) {
1660 MaskVal[j] = N->getMaskElt(i * Width + j);
1661 if (MaskVal[j] != MaskVal[j-1] + StepLen) {
1662 return false;
1663 }
1664 }
1665 }
1666
1667 return true;
1668}
1669
1670bool PPC::isXXINSERTWMask(ShuffleVectorSDNode *N, unsigned &ShiftElts,
1671 unsigned &InsertAtByte, bool &Swap, bool IsLE) {
1672 if (!isNByteElemShuffleMask(N, 4, 1))
1673 return false;
1674
1675 // Now we look at mask elements 0,4,8,12
1676 unsigned M0 = N->getMaskElt(0) / 4;
1677 unsigned M1 = N->getMaskElt(4) / 4;
1678 unsigned M2 = N->getMaskElt(8) / 4;
1679 unsigned M3 = N->getMaskElt(12) / 4;
1680 unsigned LittleEndianShifts[] = { 2, 1, 0, 3 };
1681 unsigned BigEndianShifts[] = { 3, 0, 1, 2 };
1682
1683 // Below, let H and L be arbitrary elements of the shuffle mask
1684 // where H is in the range [4,7] and L is in the range [0,3].
1685 // H, 1, 2, 3 or L, 5, 6, 7
1686 if ((M0 > 3 && M1 == 1 && M2 == 2 && M3 == 3) ||
1687 (M0 < 4 && M1 == 5 && M2 == 6 && M3 == 7)) {
1688 ShiftElts = IsLE ? LittleEndianShifts[M0 & 0x3] : BigEndianShifts[M0 & 0x3];
1689 InsertAtByte = IsLE ? 12 : 0;
1690 Swap = M0 < 4;
1691 return true;
1692 }
1693 // 0, H, 2, 3 or 4, L, 6, 7
1694 if ((M1 > 3 && M0 == 0 && M2 == 2 && M3 == 3) ||
1695 (M1 < 4 && M0 == 4 && M2 == 6 && M3 == 7)) {
1696 ShiftElts = IsLE ? LittleEndianShifts[M1 & 0x3] : BigEndianShifts[M1 & 0x3];
1697 InsertAtByte = IsLE ? 8 : 4;
1698 Swap = M1 < 4;
1699 return true;
1700 }
1701 // 0, 1, H, 3 or 4, 5, L, 7
1702 if ((M2 > 3 && M0 == 0 && M1 == 1 && M3 == 3) ||
1703 (M2 < 4 && M0 == 4 && M1 == 5 && M3 == 7)) {
1704 ShiftElts = IsLE ? LittleEndianShifts[M2 & 0x3] : BigEndianShifts[M2 & 0x3];
1705 InsertAtByte = IsLE ? 4 : 8;
1706 Swap = M2 < 4;
1707 return true;
1708 }
1709 // 0, 1, 2, H or 4, 5, 6, L
1710 if ((M3 > 3 && M0 == 0 && M1 == 1 && M2 == 2) ||
1711 (M3 < 4 && M0 == 4 && M1 == 5 && M2 == 6)) {
1712 ShiftElts = IsLE ? LittleEndianShifts[M3 & 0x3] : BigEndianShifts[M3 & 0x3];
1713 InsertAtByte = IsLE ? 0 : 12;
1714 Swap = M3 < 4;
1715 return true;
1716 }
1717
1718 // If both vector operands for the shuffle are the same vector, the mask will
1719 // contain only elements from the first one and the second one will be undef.
1720 if (N->getOperand(1).isUndef()) {
1721 ShiftElts = 0;
1722 Swap = true;
1723 unsigned XXINSERTWSrcElem = IsLE ? 2 : 1;
1724 if (M0 == XXINSERTWSrcElem && M1 == 1 && M2 == 2 && M3 == 3) {
1725 InsertAtByte = IsLE ? 12 : 0;
1726 return true;
1727 }
1728 if (M0 == 0 && M1 == XXINSERTWSrcElem && M2 == 2 && M3 == 3) {
1729 InsertAtByte = IsLE ? 8 : 4;
1730 return true;
1731 }
1732 if (M0 == 0 && M1 == 1 && M2 == XXINSERTWSrcElem && M3 == 3) {
1733 InsertAtByte = IsLE ? 4 : 8;
1734 return true;
1735 }
1736 if (M0 == 0 && M1 == 1 && M2 == 2 && M3 == XXINSERTWSrcElem) {
1737 InsertAtByte = IsLE ? 0 : 12;
1738 return true;
1739 }
1740 }
1741
1742 return false;
1743}
1744
1745bool PPC::isXXSLDWIShuffleMask(ShuffleVectorSDNode *N, unsigned &ShiftElts,
1746 bool &Swap, bool IsLE) {
1747 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1747, __extension__ __PRETTY_FUNCTION__))
;
1748 // Ensure each byte index of the word is consecutive.
1749 if (!isNByteElemShuffleMask(N, 4, 1))
1750 return false;
1751
1752 // Now we look at mask elements 0,4,8,12, which are the beginning of words.
1753 unsigned M0 = N->getMaskElt(0) / 4;
1754 unsigned M1 = N->getMaskElt(4) / 4;
1755 unsigned M2 = N->getMaskElt(8) / 4;
1756 unsigned M3 = N->getMaskElt(12) / 4;
1757
1758 // If both vector operands for the shuffle are the same vector, the mask will
1759 // contain only elements from the first one and the second one will be undef.
1760 if (N->getOperand(1).isUndef()) {
1761 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1761, __extension__ __PRETTY_FUNCTION__))
;
1762 if (M1 != (M0 + 1) % 4 || M2 != (M1 + 1) % 4 || M3 != (M2 + 1) % 4)
1763 return false;
1764
1765 ShiftElts = IsLE ? (4 - M0) % 4 : M0;
1766 Swap = false;
1767 return true;
1768 }
1769
1770 // Ensure each word index of the ShuffleVector Mask is consecutive.
1771 if (M1 != (M0 + 1) % 8 || M2 != (M1 + 1) % 8 || M3 != (M2 + 1) % 8)
1772 return false;
1773
1774 if (IsLE) {
1775 if (M0 == 0 || M0 == 7 || M0 == 6 || M0 == 5) {
1776 // Input vectors don't need to be swapped if the leading element
1777 // of the result is one of the 3 left elements of the second vector
1778 // (or if there is no shift to be done at all).
1779 Swap = false;
1780 ShiftElts = (8 - M0) % 8;
1781 } else if (M0 == 4 || M0 == 3 || M0 == 2 || M0 == 1) {
1782 // Input vectors need to be swapped if the leading element
1783 // of the result is one of the 3 left elements of the first vector
1784 // (or if we're shifting by 4 - thereby simply swapping the vectors).
1785 Swap = true;
1786 ShiftElts = (4 - M0) % 4;
1787 }
1788
1789 return true;
1790 } else { // BE
1791 if (M0 == 0 || M0 == 1 || M0 == 2 || M0 == 3) {
1792 // Input vectors don't need to be swapped if the leading element
1793 // of the result is one of the 4 elements of the first vector.
1794 Swap = false;
1795 ShiftElts = M0;
1796 } else if (M0 == 4 || M0 == 5 || M0 == 6 || M0 == 7) {
1797 // Input vectors need to be swapped if the leading element
1798 // of the result is one of the 4 elements of the right vector.
1799 Swap = true;
1800 ShiftElts = M0 - 4;
1801 }
1802
1803 return true;
1804 }
1805}
1806
1807bool static isXXBRShuffleMaskHelper(ShuffleVectorSDNode *N, int Width) {
1808 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1808, __extension__ __PRETTY_FUNCTION__))
;
1809
1810 if (!isNByteElemShuffleMask(N, Width, -1))
1811 return false;
1812
1813 for (int i = 0; i < 16; i += Width)
1814 if (N->getMaskElt(i) != i + Width - 1)
1815 return false;
1816
1817 return true;
1818}
1819
1820bool PPC::isXXBRHShuffleMask(ShuffleVectorSDNode *N) {
1821 return isXXBRShuffleMaskHelper(N, 2);
1822}
1823
1824bool PPC::isXXBRWShuffleMask(ShuffleVectorSDNode *N) {
1825 return isXXBRShuffleMaskHelper(N, 4);
1826}
1827
1828bool PPC::isXXBRDShuffleMask(ShuffleVectorSDNode *N) {
1829 return isXXBRShuffleMaskHelper(N, 8);
1830}
1831
1832bool PPC::isXXBRQShuffleMask(ShuffleVectorSDNode *N) {
1833 return isXXBRShuffleMaskHelper(N, 16);
1834}
1835
1836/// Can node \p N be lowered to an XXPERMDI instruction? If so, set \p Swap
1837/// if the inputs to the instruction should be swapped and set \p DM to the
1838/// value for the immediate.
1839/// Specifically, set \p Swap to true only if \p N can be lowered to XXPERMDI
1840/// AND element 0 of the result comes from the first input (LE) or second input
1841/// (BE). Set \p DM to the calculated result (0-3) only if \p N can be lowered.
1842/// \return true iff the given mask of shuffle node \p N is a XXPERMDI shuffle
1843/// mask.
1844bool PPC::isXXPERMDIShuffleMask(ShuffleVectorSDNode *N, unsigned &DM,
1845 bool &Swap, bool IsLE) {
1846 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1846, __extension__ __PRETTY_FUNCTION__))
;
1847
1848 // Ensure each byte index of the double word is consecutive.
1849 if (!isNByteElemShuffleMask(N, 8, 1))
1850 return false;
1851
1852 unsigned M0 = N->getMaskElt(0) / 8;
1853 unsigned M1 = N->getMaskElt(8) / 8;
1854 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1854, __extension__ __PRETTY_FUNCTION__))
;
1855
1856 // If both vector operands for the shuffle are the same vector, the mask will
1857 // contain only elements from the first one and the second one will be undef.
1858 if (N->getOperand(1).isUndef()) {
1859 if ((M0 | M1) < 2) {
1860 DM = IsLE ? (((~M1) & 1) << 1) + ((~M0) & 1) : (M0 << 1) + (M1 & 1);
1861 Swap = false;
1862 return true;
1863 } else
1864 return false;
1865 }
1866
1867 if (IsLE) {
1868 if (M0 > 1 && M1 < 2) {
1869 Swap = false;
1870 } else if (M0 < 2 && M1 > 1) {
1871 M0 = (M0 + 2) % 4;
1872 M1 = (M1 + 2) % 4;
1873 Swap = true;
1874 } else
1875 return false;
1876
1877 // Note: if control flow comes here that means Swap is already set above
1878 DM = (((~M1) & 1) << 1) + ((~M0) & 1);
1879 return true;
1880 } else { // BE
1881 if (M0 < 2 && M1 > 1) {
1882 Swap = false;
1883 } else if (M0 > 1 && M1 < 2) {
1884 M0 = (M0 + 2) % 4;
1885 M1 = (M1 + 2) % 4;
1886 Swap = true;
1887 } else
1888 return false;
1889
1890 // Note: if control flow comes here that means Swap is already set above
1891 DM = (M0 << 1) + (M1 & 1);
1892 return true;
1893 }
1894}
1895
1896
1897/// getVSPLTImmediate - Return the appropriate VSPLT* immediate to splat the
1898/// specified isSplatShuffleMask VECTOR_SHUFFLE mask.
1899unsigned PPC::getVSPLTImmediate(SDNode *N, unsigned EltSize,
1900 SelectionDAG &DAG) {
1901 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
1902 assert(isSplatShuffleMask(SVOp, EltSize))(static_cast <bool> (isSplatShuffleMask(SVOp, EltSize))
? void (0) : __assert_fail ("isSplatShuffleMask(SVOp, EltSize)"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1902, __extension__ __PRETTY_FUNCTION__))
;
1903 if (DAG.getDataLayout().isLittleEndian())
1904 return (16 / EltSize) - 1 - (SVOp->getMaskElt(0) / EltSize);
1905 else
1906 return SVOp->getMaskElt(0) / EltSize;
1907}
1908
1909/// get_VSPLTI_elt - If this is a build_vector of constants which can be formed
1910/// by using a vspltis[bhw] instruction of the specified element size, return
1911/// the constant being splatted. The ByteSize field indicates the number of
1912/// bytes of each element [124] -> [bhw].
1913SDValue PPC::get_VSPLTI_elt(SDNode *N, unsigned ByteSize, SelectionDAG &DAG) {
1914 SDValue OpVal(nullptr, 0);
1915
1916 // If ByteSize of the splat is bigger than the element size of the
1917 // build_vector, then we have a case where we are checking for a splat where
1918 // multiple elements of the buildvector are folded together into a single
1919 // logical element of the splat (e.g. "vsplish 1" to splat {0,1}*8).
1920 unsigned EltSize = 16/N->getNumOperands();
1921 if (EltSize < ByteSize) {
1922 unsigned Multiple = ByteSize/EltSize; // Number of BV entries per spltval.
1923 SDValue UniquedVals[4];
1924 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1924, __extension__ __PRETTY_FUNCTION__))
;
1925
1926 // See if all of the elements in the buildvector agree across.
1927 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
1928 if (N->getOperand(i).isUndef()) continue;
1929 // If the element isn't a constant, bail fully out.
1930 if (!isa<ConstantSDNode>(N->getOperand(i))) return SDValue();
1931
1932 if (!UniquedVals[i&(Multiple-1)].getNode())
1933 UniquedVals[i&(Multiple-1)] = N->getOperand(i);
1934 else if (UniquedVals[i&(Multiple-1)] != N->getOperand(i))
1935 return SDValue(); // no match.
1936 }
1937
1938 // Okay, if we reached this point, UniquedVals[0..Multiple-1] contains
1939 // either constant or undef values that are identical for each chunk. See
1940 // if these chunks can form into a larger vspltis*.
1941
1942 // Check to see if all of the leading entries are either 0 or -1. If
1943 // neither, then this won't fit into the immediate field.
1944 bool LeadingZero = true;
1945 bool LeadingOnes = true;
1946 for (unsigned i = 0; i != Multiple-1; ++i) {
1947 if (!UniquedVals[i].getNode()) continue; // Must have been undefs.
1948
1949 LeadingZero &= isNullConstant(UniquedVals[i]);
1950 LeadingOnes &= isAllOnesConstant(UniquedVals[i]);
1951 }
1952 // Finally, check the least significant entry.
1953 if (LeadingZero) {
1954 if (!UniquedVals[Multiple-1].getNode())
1955 return DAG.getTargetConstant(0, SDLoc(N), MVT::i32); // 0,0,0,undef
1956 int Val = cast<ConstantSDNode>(UniquedVals[Multiple-1])->getZExtValue();
1957 if (Val < 16) // 0,0,0,4 -> vspltisw(4)
1958 return DAG.getTargetConstant(Val, SDLoc(N), MVT::i32);
1959 }
1960 if (LeadingOnes) {
1961 if (!UniquedVals[Multiple-1].getNode())
1962 return DAG.getTargetConstant(~0U, SDLoc(N), MVT::i32); // -1,-1,-1,undef
1963 int Val =cast<ConstantSDNode>(UniquedVals[Multiple-1])->getSExtValue();
1964 if (Val >= -16) // -1,-1,-1,-2 -> vspltisw(-2)
1965 return DAG.getTargetConstant(Val, SDLoc(N), MVT::i32);
1966 }
1967
1968 return SDValue();
1969 }
1970
1971 // Check to see if this buildvec has a single non-undef value in its elements.
1972 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
1973 if (N->getOperand(i).isUndef()) continue;
1974 if (!OpVal.getNode())
1975 OpVal = N->getOperand(i);
1976 else if (OpVal != N->getOperand(i))
1977 return SDValue();
1978 }
1979
1980 if (!OpVal.getNode()) return SDValue(); // All UNDEF: use implicit def.
1981
1982 unsigned ValSizeInBytes = EltSize;
1983 uint64_t Value = 0;
1984 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal)) {
1985 Value = CN->getZExtValue();
1986 } else if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(OpVal)) {
1987 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 1987, __extension__ __PRETTY_FUNCTION__))
;
1988 Value = FloatToBits(CN->getValueAPF().convertToFloat());
1989 }
1990
1991 // If the splat value is larger than the element value, then we can never do
1992 // this splat. The only case that we could fit the replicated bits into our
1993 // immediate field for would be zero, and we prefer to use vxor for it.
1994 if (ValSizeInBytes < ByteSize) return SDValue();
1995
1996 // If the element value is larger than the splat value, check if it consists
1997 // of a repeated bit pattern of size ByteSize.
1998 if (!APInt(ValSizeInBytes * 8, Value).isSplat(ByteSize * 8))
1999 return SDValue();
2000
2001 // Properly sign extend the value.
2002 int MaskVal = SignExtend32(Value, ByteSize * 8);
2003
2004 // If this is zero, don't match, zero matches ISD::isBuildVectorAllZeros.
2005 if (MaskVal == 0) return SDValue();
2006
2007 // Finally, if this value fits in a 5 bit sext field, return it
2008 if (SignExtend32<5>(MaskVal) == MaskVal)
2009 return DAG.getTargetConstant(MaskVal, SDLoc(N), MVT::i32);
2010 return SDValue();
2011}
2012
2013/// isQVALIGNIShuffleMask - If this is a qvaligni shuffle mask, return the shift
2014/// amount, otherwise return -1.
2015int PPC::isQVALIGNIShuffleMask(SDNode *N) {
2016 EVT VT = N->getValueType(0);
2017 if (VT != MVT::v4f64 && VT != MVT::v4f32 && VT != MVT::v4i1)
2018 return -1;
2019
2020 ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(N);
2021
2022 // Find the first non-undef value in the shuffle mask.
2023 unsigned i;
2024 for (i = 0; i != 4 && SVOp->getMaskElt(i) < 0; ++i)
2025 /*search*/;
2026
2027 if (i == 4) return -1; // all undef.
2028
2029 // Otherwise, check to see if the rest of the elements are consecutively
2030 // numbered from this value.
2031 unsigned ShiftAmt = SVOp->getMaskElt(i);
2032 if (ShiftAmt < i) return -1;
2033 ShiftAmt -= i;
2034
2035 // Check the rest of the elements to see if they are consecutive.
2036 for (++i; i != 4; ++i)
2037 if (!isConstantOrUndef(SVOp->getMaskElt(i), ShiftAmt+i))
2038 return -1;
2039
2040 return ShiftAmt;
2041}
2042
2043//===----------------------------------------------------------------------===//
2044// Addressing Mode Selection
2045//===----------------------------------------------------------------------===//
2046
2047/// isIntS16Immediate - This method tests to see if the node is either a 32-bit
2048/// or 64-bit immediate, and if the value can be accurately represented as a
2049/// sign extension from a 16-bit value. If so, this returns true and the
2050/// immediate.
2051bool llvm::isIntS16Immediate(SDNode *N, int16_t &Imm) {
2052 if (!isa<ConstantSDNode>(N))
2053 return false;
2054
2055 Imm = (int16_t)cast<ConstantSDNode>(N)->getZExtValue();
2056 if (N->getValueType(0) == MVT::i32)
2057 return Imm == (int32_t)cast<ConstantSDNode>(N)->getZExtValue();
2058 else
2059 return Imm == (int64_t)cast<ConstantSDNode>(N)->getZExtValue();
2060}
2061bool llvm::isIntS16Immediate(SDValue Op, int16_t &Imm) {
2062 return isIntS16Immediate(Op.getNode(), Imm);
2063}
2064
2065/// SelectAddressRegReg - Given the specified addressed, check to see if it
2066/// can be represented as an indexed [r+r] operation. Returns false if it
2067/// can be more efficiently represented with [r+imm].
2068bool PPCTargetLowering::SelectAddressRegReg(SDValue N, SDValue &Base,
2069 SDValue &Index,
2070 SelectionDAG &DAG) const {
2071 int16_t imm = 0;
2072 if (N.getOpcode() == ISD::ADD) {
2073 if (isIntS16Immediate(N.getOperand(1), imm))
2074 return false; // r+i
2075 if (N.getOperand(1).getOpcode() == PPCISD::Lo)
2076 return false; // r+i
2077
2078 Base = N.getOperand(0);
2079 Index = N.getOperand(1);
2080 return true;
2081 } else if (N.getOpcode() == ISD::OR) {
2082 if (isIntS16Immediate(N.getOperand(1), imm))
2083 return false; // r+i can fold it if we can.
2084
2085 // If this is an or of disjoint bitfields, we can codegen this as an add
2086 // (for better address arithmetic) if the LHS and RHS of the OR are provably
2087 // disjoint.
2088 KnownBits LHSKnown, RHSKnown;
2089 DAG.computeKnownBits(N.getOperand(0), LHSKnown);
2090
2091 if (LHSKnown.Zero.getBoolValue()) {
2092 DAG.computeKnownBits(N.getOperand(1), RHSKnown);
2093 // If all of the bits are known zero on the LHS or RHS, the add won't
2094 // carry.
2095 if (~(LHSKnown.Zero | RHSKnown.Zero) == 0) {
2096 Base = N.getOperand(0);
2097 Index = N.getOperand(1);
2098 return true;
2099 }
2100 }
2101 }
2102
2103 return false;
2104}
2105
2106// If we happen to be doing an i64 load or store into a stack slot that has
2107// less than a 4-byte alignment, then the frame-index elimination may need to
2108// use an indexed load or store instruction (because the offset may not be a
2109// multiple of 4). The extra register needed to hold the offset comes from the
2110// register scavenger, and it is possible that the scavenger will need to use
2111// an emergency spill slot. As a result, we need to make sure that a spill slot
2112// is allocated when doing an i64 load/store into a less-than-4-byte-aligned
2113// stack slot.
2114static void fixupFuncForFI(SelectionDAG &DAG, int FrameIdx, EVT VT) {
2115 // FIXME: This does not handle the LWA case.
2116 if (VT != MVT::i64)
2117 return;
2118
2119 // NOTE: We'll exclude negative FIs here, which come from argument
2120 // lowering, because there are no known test cases triggering this problem
2121 // using packed structures (or similar). We can remove this exclusion if
2122 // we find such a test case. The reason why this is so test-case driven is
2123 // because this entire 'fixup' is only to prevent crashes (from the
2124 // register scavenger) on not-really-valid inputs. For example, if we have:
2125 // %a = alloca i1
2126 // %b = bitcast i1* %a to i64*
2127 // store i64* a, i64 b
2128 // then the store should really be marked as 'align 1', but is not. If it
2129 // were marked as 'align 1' then the indexed form would have been
2130 // instruction-selected initially, and the problem this 'fixup' is preventing
2131 // won't happen regardless.
2132 if (FrameIdx < 0)
2133 return;
2134
2135 MachineFunction &MF = DAG.getMachineFunction();
2136 MachineFrameInfo &MFI = MF.getFrameInfo();
2137
2138 unsigned Align = MFI.getObjectAlignment(FrameIdx);
2139 if (Align >= 4)
2140 return;
2141
2142 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
2143 FuncInfo->setHasNonRISpills();
2144}
2145
2146/// Returns true if the address N can be represented by a base register plus
2147/// a signed 16-bit displacement [r+imm], and if it is not better
2148/// represented as reg+reg. If \p Alignment is non-zero, only accept
2149/// displacements that are multiples of that value.
2150bool PPCTargetLowering::SelectAddressRegImm(SDValue N, SDValue &Disp,
2151 SDValue &Base,
2152 SelectionDAG &DAG,
2153 unsigned Alignment) const {
2154 // FIXME dl should come from parent load or store, not from address
2155 SDLoc dl(N);
2156 // If this can be more profitably realized as r+r, fail.
2157 if (SelectAddressRegReg(N, Disp, Base, DAG))
2158 return false;
2159
2160 if (N.getOpcode() == ISD::ADD) {
2161 int16_t imm = 0;
2162 if (isIntS16Immediate(N.getOperand(1), imm) &&
2163 (!Alignment || (imm % Alignment) == 0)) {
2164 Disp = DAG.getTargetConstant(imm, dl, N.getValueType());
2165 if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
2166 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
2167 fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
2168 } else {
2169 Base = N.getOperand(0);
2170 }
2171 return true; // [r+i]
2172 } else if (N.getOperand(1).getOpcode() == PPCISD::Lo) {
2173 // Match LOAD (ADD (X, Lo(G))).
2174 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2175, __extension__ __PRETTY_FUNCTION__))
2175 && "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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2175, __extension__ __PRETTY_FUNCTION__))
;
2176 Disp = N.getOperand(1).getOperand(0); // The global address.
2177 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2180, __extension__ __PRETTY_FUNCTION__))
2178 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2180, __extension__ __PRETTY_FUNCTION__))
2179 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2180, __extension__ __PRETTY_FUNCTION__))
2180 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2180, __extension__ __PRETTY_FUNCTION__))
;
2181 Base = N.getOperand(0);
2182 return true; // [&g+r]
2183 }
2184 } else if (N.getOpcode() == ISD::OR) {
2185 int16_t imm = 0;
2186 if (isIntS16Immediate(N.getOperand(1), imm) &&
2187 (!Alignment || (imm % Alignment) == 0)) {
2188 // If this is an or of disjoint bitfields, we can codegen this as an add
2189 // (for better address arithmetic) if the LHS and RHS of the OR are
2190 // provably disjoint.
2191 KnownBits LHSKnown;
2192 DAG.computeKnownBits(N.getOperand(0), LHSKnown);
2193
2194 if ((LHSKnown.Zero.getZExtValue()|~(uint64_t)imm) == ~0ULL) {
2195 // If all of the bits are known zero on the LHS or RHS, the add won't
2196 // carry.
2197 if (FrameIndexSDNode *FI =
2198 dyn_cast<FrameIndexSDNode>(N.getOperand(0))) {
2199 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
2200 fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
2201 } else {
2202 Base = N.getOperand(0);
2203 }
2204 Disp = DAG.getTargetConstant(imm, dl, N.getValueType());
2205 return true;
2206 }
2207 }
2208 } else if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N)) {
2209 // Loading from a constant address.
2210
2211 // If this address fits entirely in a 16-bit sext immediate field, codegen
2212 // this as "d, 0"
2213 int16_t Imm;
2214 if (isIntS16Immediate(CN, Imm) && (!Alignment || (Imm % Alignment) == 0)) {
2215 Disp = DAG.getTargetConstant(Imm, dl, CN->getValueType(0));
2216 Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
2217 CN->getValueType(0));
2218 return true;
2219 }
2220
2221 // Handle 32-bit sext immediates with LIS + addr mode.
2222 if ((CN->getValueType(0) == MVT::i32 ||
2223 (int64_t)CN->getZExtValue() == (int)CN->getZExtValue()) &&
2224 (!Alignment || (CN->getZExtValue() % Alignment) == 0)) {
2225 int Addr = (int)CN->getZExtValue();
2226
2227 // Otherwise, break this down into an LIS + disp.
2228 Disp = DAG.getTargetConstant((short)Addr, dl, MVT::i32);
2229
2230 Base = DAG.getTargetConstant((Addr - (signed short)Addr) >> 16, dl,
2231 MVT::i32);
2232 unsigned Opc = CN->getValueType(0) == MVT::i32 ? PPC::LIS : PPC::LIS8;
2233 Base = SDValue(DAG.getMachineNode(Opc, dl, CN->getValueType(0), Base), 0);
2234 return true;
2235 }
2236 }
2237
2238 Disp = DAG.getTargetConstant(0, dl, getPointerTy(DAG.getDataLayout()));
2239 if (FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(N)) {
2240 Base = DAG.getTargetFrameIndex(FI->getIndex(), N.getValueType());
2241 fixupFuncForFI(DAG, FI->getIndex(), N.getValueType());
2242 } else
2243 Base = N;
2244 return true; // [r+0]
2245}
2246
2247/// SelectAddressRegRegOnly - Given the specified addressed, force it to be
2248/// represented as an indexed [r+r] operation.
2249bool PPCTargetLowering::SelectAddressRegRegOnly(SDValue N, SDValue &Base,
2250 SDValue &Index,
2251 SelectionDAG &DAG) const {
2252 // Check to see if we can easily represent this as an [r+r] address. This
2253 // will fail if it thinks that the address is more profitably represented as
2254 // reg+imm, e.g. where imm = 0.
2255 if (SelectAddressRegReg(N, Base, Index, DAG))
2256 return true;
2257
2258 // If the address is the result of an add, we will utilize the fact that the
2259 // address calculation includes an implicit add. However, we can reduce
2260 // register pressure if we do not materialize a constant just for use as the
2261 // index register. We only get rid of the add if it is not an add of a
2262 // value and a 16-bit signed constant and both have a single use.
2263 int16_t imm = 0;
2264 if (N.getOpcode() == ISD::ADD &&
2265 (!isIntS16Immediate(N.getOperand(1), imm) ||
2266 !N.getOperand(1).hasOneUse() || !N.getOperand(0).hasOneUse())) {
2267 Base = N.getOperand(0);
2268 Index = N.getOperand(1);
2269 return true;
2270 }
2271
2272 // Otherwise, do it the hard way, using R0 as the base register.
2273 Base = DAG.getRegister(Subtarget.isPPC64() ? PPC::ZERO8 : PPC::ZERO,
2274 N.getValueType());
2275 Index = N;
2276 return true;
2277}
2278
2279/// getPreIndexedAddressParts - returns true by value, base pointer and
2280/// offset pointer and addressing mode by reference if the node's address
2281/// can be legally represented as pre-indexed load / store address.
2282bool PPCTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
2283 SDValue &Offset,
2284 ISD::MemIndexedMode &AM,
2285 SelectionDAG &DAG) const {
2286 if (DisablePPCPreinc) return false;
2287
2288 bool isLoad = true;
2289 SDValue Ptr;
2290 EVT VT;
2291 unsigned Alignment;
2292 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
2293 Ptr = LD->getBasePtr();
2294 VT = LD->getMemoryVT();
2295 Alignment = LD->getAlignment();
2296 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
2297 Ptr = ST->getBasePtr();
2298 VT = ST->getMemoryVT();
2299 Alignment = ST->getAlignment();
2300 isLoad = false;
2301 } else
2302 return false;
2303
2304 // PowerPC doesn't have preinc load/store instructions for vectors (except
2305 // for QPX, which does have preinc r+r forms).
2306 if (VT.isVector()) {
2307 if (!Subtarget.hasQPX() || (VT != MVT::v4f64 && VT != MVT::v4f32)) {
2308 return false;
2309 } else if (SelectAddressRegRegOnly(Ptr, Offset, Base, DAG)) {
2310 AM = ISD::PRE_INC;
2311 return true;
2312 }
2313 }
2314
2315 if (SelectAddressRegReg(Ptr, Base, Offset, DAG)) {
2316 // Common code will reject creating a pre-inc form if the base pointer
2317 // is a frame index, or if N is a store and the base pointer is either
2318 // the same as or a predecessor of the value being stored. Check for
2319 // those situations here, and try with swapped Base/Offset instead.
2320 bool Swap = false;
2321
2322 if (isa<FrameIndexSDNode>(Base) || isa<RegisterSDNode>(Base))
2323 Swap = true;
2324 else if (!isLoad) {
2325 SDValue Val = cast<StoreSDNode>(N)->getValue();
2326 if (Val == Base || Base.getNode()->isPredecessorOf(Val.getNode()))
2327 Swap = true;
2328 }
2329
2330 if (Swap)
2331 std::swap(Base, Offset);
2332
2333 AM = ISD::PRE_INC;
2334 return true;
2335 }
2336
2337 // LDU/STU can only handle immediates that are a multiple of 4.
2338 if (VT != MVT::i64) {
2339 if (!SelectAddressRegImm(Ptr, Offset, Base, DAG, 0))
2340 return false;
2341 } else {
2342 // LDU/STU need an address with at least 4-byte alignment.
2343 if (Alignment < 4)
2344 return false;
2345
2346 if (!SelectAddressRegImm(Ptr, Offset, Base, DAG, 4))
2347 return false;
2348 }
2349
2350 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
2351 // PPC64 doesn't have lwau, but it does have lwaux. Reject preinc load of
2352 // sext i32 to i64 when addr mode is r+i.
2353 if (LD->getValueType(0) == MVT::i64 && LD->getMemoryVT() == MVT::i32 &&
2354 LD->getExtensionType() == ISD::SEXTLOAD &&
2355 isa<ConstantSDNode>(Offset))
2356 return false;
2357 }
2358
2359 AM = ISD::PRE_INC;
2360 return true;
2361}
2362
2363//===----------------------------------------------------------------------===//
2364// LowerOperation implementation
2365//===----------------------------------------------------------------------===//
2366
2367/// Return true if we should reference labels using a PICBase, set the HiOpFlags
2368/// and LoOpFlags to the target MO flags.
2369static void getLabelAccessInfo(bool IsPIC, const PPCSubtarget &Subtarget,
2370 unsigned &HiOpFlags, unsigned &LoOpFlags,
2371 const GlobalValue *GV = nullptr) {
2372 HiOpFlags = PPCII::MO_HA;
2373 LoOpFlags = PPCII::MO_LO;
2374
2375 // Don't use the pic base if not in PIC relocation model.
2376 if (IsPIC) {
2377 HiOpFlags |= PPCII::MO_PIC_FLAG;
2378 LoOpFlags |= PPCII::MO_PIC_FLAG;
2379 }
2380
2381 // If this is a reference to a global value that requires a non-lazy-ptr, make
2382 // sure that instruction lowering adds it.
2383 if (GV && Subtarget.hasLazyResolverStub(GV)) {
2384 HiOpFlags |= PPCII::MO_NLP_FLAG;
2385 LoOpFlags |= PPCII::MO_NLP_FLAG;
2386
2387 if (GV->hasHiddenVisibility()) {
2388 HiOpFlags |= PPCII::MO_NLP_HIDDEN_FLAG;
2389 LoOpFlags |= PPCII::MO_NLP_HIDDEN_FLAG;
2390 }
2391 }
2392}
2393
2394static SDValue LowerLabelRef(SDValue HiPart, SDValue LoPart, bool isPIC,
2395 SelectionDAG &DAG) {
2396 SDLoc DL(HiPart);
2397 EVT PtrVT = HiPart.getValueType();
2398 SDValue Zero = DAG.getConstant(0, DL, PtrVT);
2399
2400 SDValue Hi = DAG.getNode(PPCISD::Hi, DL, PtrVT, HiPart, Zero);
2401 SDValue Lo = DAG.getNode(PPCISD::Lo, DL, PtrVT, LoPart, Zero);
2402
2403 // With PIC, the first instruction is actually "GR+hi(&G)".
2404 if (isPIC)
2405 Hi = DAG.getNode(ISD::ADD, DL, PtrVT,
2406 DAG.getNode(PPCISD::GlobalBaseReg, DL, PtrVT), Hi);
2407
2408 // Generate non-pic code that has direct accesses to the constant pool.
2409 // The address of the global is just (hi(&g)+lo(&g)).
2410 return DAG.getNode(ISD::ADD, DL, PtrVT, Hi, Lo);
2411}
2412
2413static void setUsesTOCBasePtr(MachineFunction &MF) {
2414 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
2415 FuncInfo->setUsesTOCBasePtr();
2416}
2417
2418static void setUsesTOCBasePtr(SelectionDAG &DAG) {
2419 setUsesTOCBasePtr(DAG.getMachineFunction());
2420}
2421
2422static SDValue getTOCEntry(SelectionDAG &DAG, const SDLoc &dl, bool Is64Bit,
2423 SDValue GA) {
2424 EVT VT = Is64Bit ? MVT::i64 : MVT::i32;
2425 SDValue Reg = Is64Bit ? DAG.getRegister(PPC::X2, VT) :
2426 DAG.getNode(PPCISD::GlobalBaseReg, dl, VT);
2427
2428 SDValue Ops[] = { GA, Reg };
2429 return DAG.getMemIntrinsicNode(
2430 PPCISD::TOC_ENTRY, dl, DAG.getVTList(VT, MVT::Other), Ops, VT,
2431 MachinePointerInfo::getGOT(DAG.getMachineFunction()), 0,
2432 MachineMemOperand::MOLoad);
2433}
2434
2435SDValue PPCTargetLowering::LowerConstantPool(SDValue Op,
2436 SelectionDAG &DAG) const {
2437 EVT PtrVT = Op.getValueType();
2438 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
2439 const Constant *C = CP->getConstVal();
2440
2441 // 64-bit SVR4 ABI code is always position-independent.
2442 // The actual address of the GlobalValue is stored in the TOC.
2443 if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
2444 setUsesTOCBasePtr(DAG);
2445 SDValue GA = DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0);
2446 return getTOCEntry(DAG, SDLoc(CP), true, GA);
2447 }
2448
2449 unsigned MOHiFlag, MOLoFlag;
2450 bool IsPIC = isPositionIndependent();
2451 getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag);
2452
2453 if (IsPIC && Subtarget.isSVR4ABI()) {
2454 SDValue GA = DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(),
2455 PPCII::MO_PIC_FLAG);
2456 return getTOCEntry(DAG, SDLoc(CP), false, GA);
2457 }
2458
2459 SDValue CPIHi =
2460 DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0, MOHiFlag);
2461 SDValue CPILo =
2462 DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment(), 0, MOLoFlag);
2463 return LowerLabelRef(CPIHi, CPILo, IsPIC, DAG);
2464}
2465
2466// For 64-bit PowerPC, prefer the more compact relative encodings.
2467// This trades 32 bits per jump table entry for one or two instructions
2468// on the jump site.
2469unsigned PPCTargetLowering::getJumpTableEncoding() const {
2470 if (isJumpTableRelative())
2471 return MachineJumpTableInfo::EK_LabelDifference32;
2472
2473 return TargetLowering::getJumpTableEncoding();
2474}
2475
2476bool PPCTargetLowering::isJumpTableRelative() const {
2477 if (Subtarget.isPPC64())
2478 return true;
2479 return TargetLowering::isJumpTableRelative();
2480}
2481
2482SDValue PPCTargetLowering::getPICJumpTableRelocBase(SDValue Table,
2483 SelectionDAG &DAG) const {
2484 if (!Subtarget.isPPC64())
2485 return TargetLowering::getPICJumpTableRelocBase(Table, DAG);
2486
2487 switch (getTargetMachine().getCodeModel()) {
2488 case CodeModel::Small:
2489 case CodeModel::Medium:
2490 return TargetLowering::getPICJumpTableRelocBase(Table, DAG);
2491 default:
2492 return DAG.getNode(PPCISD::GlobalBaseReg, SDLoc(),
2493 getPointerTy(DAG.getDataLayout()));
2494 }
2495}
2496
2497const MCExpr *
2498PPCTargetLowering::getPICJumpTableRelocBaseExpr(const MachineFunction *MF,
2499 unsigned JTI,
2500 MCContext &Ctx) const {
2501 if (!Subtarget.isPPC64())
2502 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
2503
2504 switch (getTargetMachine().getCodeModel()) {
2505 case CodeModel::Small:
2506 case CodeModel::Medium:
2507 return TargetLowering::getPICJumpTableRelocBaseExpr(MF, JTI, Ctx);
2508 default:
2509 return MCSymbolRefExpr::create(MF->getPICBaseSymbol(), Ctx);
2510 }
2511}
2512
2513SDValue PPCTargetLowering::LowerJumpTable(SDValue Op, SelectionDAG &DAG) const {
2514 EVT PtrVT = Op.getValueType();
2515 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
2516
2517 // 64-bit SVR4 ABI code is always position-independent.
2518 // The actual address of the GlobalValue is stored in the TOC.
2519 if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
2520 setUsesTOCBasePtr(DAG);
2521 SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
2522 return getTOCEntry(DAG, SDLoc(JT), true, GA);
2523 }
2524
2525 unsigned MOHiFlag, MOLoFlag;
2526 bool IsPIC = isPositionIndependent();
2527 getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag);
2528
2529 if (IsPIC && Subtarget.isSVR4ABI()) {
2530 SDValue GA = DAG.getTargetJumpTable(JT->getIndex(), PtrVT,
2531 PPCII::MO_PIC_FLAG);
2532 return getTOCEntry(DAG, SDLoc(GA), false, GA);
2533 }
2534
2535 SDValue JTIHi = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOHiFlag);
2536 SDValue JTILo = DAG.getTargetJumpTable(JT->getIndex(), PtrVT, MOLoFlag);
2537 return LowerLabelRef(JTIHi, JTILo, IsPIC, DAG);
2538}
2539
2540SDValue PPCTargetLowering::LowerBlockAddress(SDValue Op,
2541 SelectionDAG &DAG) const {
2542 EVT PtrVT = Op.getValueType();
2543 BlockAddressSDNode *BASDN = cast<BlockAddressSDNode>(Op);
2544 const BlockAddress *BA = BASDN->getBlockAddress();
2545
2546 // 64-bit SVR4 ABI code is always position-independent.
2547 // The actual BlockAddress is stored in the TOC.
2548 if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
2549 setUsesTOCBasePtr(DAG);
2550 SDValue GA = DAG.getTargetBlockAddress(BA, PtrVT, BASDN->getOffset());
2551 return getTOCEntry(DAG, SDLoc(BASDN), true, GA);
2552 }
2553
2554 unsigned MOHiFlag, MOLoFlag;
2555 bool IsPIC = isPositionIndependent();
2556 getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag);
2557 SDValue TgtBAHi = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOHiFlag);
2558 SDValue TgtBALo = DAG.getTargetBlockAddress(BA, PtrVT, 0, MOLoFlag);
2559 return LowerLabelRef(TgtBAHi, TgtBALo, IsPIC, DAG);
2560}
2561
2562SDValue PPCTargetLowering::LowerGlobalTLSAddress(SDValue Op,
2563 SelectionDAG &DAG) const {
2564 // FIXME: TLS addresses currently use medium model code sequences,
2565 // which is the most useful form. Eventually support for small and
2566 // large models could be added if users need it, at the cost of
2567 // additional complexity.
2568 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
2569 if (DAG.getTarget().Options.EmulatedTLS)
2570 return LowerToTLSEmulatedModel(GA, DAG);
2571
2572 SDLoc dl(GA);
2573 const GlobalValue *GV = GA->getGlobal();
2574 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2575 bool is64bit = Subtarget.isPPC64();
2576 const Module *M = DAG.getMachineFunction().getFunction().getParent();
2577 PICLevel::Level picLevel = M->getPICLevel();
2578
2579 TLSModel::Model Model = getTargetMachine().getTLSModel(GV);
2580
2581 if (Model == TLSModel::LocalExec) {
2582 SDValue TGAHi = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
2583 PPCII::MO_TPREL_HA);
2584 SDValue TGALo = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
2585 PPCII::MO_TPREL_LO);
2586 SDValue TLSReg = is64bit ? DAG.getRegister(PPC::X13, MVT::i64)
2587 : DAG.getRegister(PPC::R2, MVT::i32);
2588
2589 SDValue Hi = DAG.getNode(PPCISD::Hi, dl, PtrVT, TGAHi, TLSReg);
2590 return DAG.getNode(PPCISD::Lo, dl, PtrVT, TGALo, Hi);
2591 }
2592
2593 if (Model == TLSModel::InitialExec) {
2594 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, 0);
2595 SDValue TGATLS = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0,
2596 PPCII::MO_TLS);
2597 SDValue GOTPtr;
2598 if (is64bit) {
2599 setUsesTOCBasePtr(DAG);
2600 SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
2601 GOTPtr = DAG.getNode(PPCISD::ADDIS_GOT_TPREL_HA, dl,
2602 PtrVT, GOTReg, TGA);
2603 } else
2604 GOTPtr = DAG.getNode(PPCISD::PPC32_GOT, dl, PtrVT);
2605 SDValue TPOffset = DAG.getNode(PPCISD::LD_GOT_TPREL_L, dl,
2606 PtrVT, TGA, GOTPtr);
2607 return DAG.getNode(PPCISD::ADD_TLS, dl, PtrVT, TPOffset, TGATLS);
2608 }
2609
2610 if (Model == TLSModel::GeneralDynamic) {
2611 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, 0);
2612 SDValue GOTPtr;
2613 if (is64bit) {
2614 setUsesTOCBasePtr(DAG);
2615 SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
2616 GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSGD_HA, dl, PtrVT,
2617 GOTReg, TGA);
2618 } else {
2619 if (picLevel == PICLevel::SmallPIC)
2620 GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
2621 else
2622 GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
2623 }
2624 return DAG.getNode(PPCISD::ADDI_TLSGD_L_ADDR, dl, PtrVT,
2625 GOTPtr, TGA, TGA);
2626 }
2627
2628 if (Model == TLSModel::LocalDynamic) {
2629 SDValue TGA = DAG.getTargetGlobalAddress(GV, dl, PtrVT, 0, 0);
2630 SDValue GOTPtr;
2631 if (is64bit) {
2632 setUsesTOCBasePtr(DAG);
2633 SDValue GOTReg = DAG.getRegister(PPC::X2, MVT::i64);
2634 GOTPtr = DAG.getNode(PPCISD::ADDIS_TLSLD_HA, dl, PtrVT,
2635 GOTReg, TGA);
2636 } else {
2637 if (picLevel == PICLevel::SmallPIC)
2638 GOTPtr = DAG.getNode(PPCISD::GlobalBaseReg, dl, PtrVT);
2639 else
2640 GOTPtr = DAG.getNode(PPCISD::PPC32_PICGOT, dl, PtrVT);
2641 }
2642 SDValue TLSAddr = DAG.getNode(PPCISD::ADDI_TLSLD_L_ADDR, dl,
2643 PtrVT, GOTPtr, TGA, TGA);
2644 SDValue DtvOffsetHi = DAG.getNode(PPCISD::ADDIS_DTPREL_HA, dl,
2645 PtrVT, TLSAddr, TGA);
2646 return DAG.getNode(PPCISD::ADDI_DTPREL_L, dl, PtrVT, DtvOffsetHi, TGA);
2647 }
2648
2649 llvm_unreachable("Unknown TLS model!")::llvm::llvm_unreachable_internal("Unknown TLS model!", "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2649)
;
2650}
2651
2652SDValue PPCTargetLowering::LowerGlobalAddress(SDValue Op,
2653 SelectionDAG &DAG) const {
2654 EVT PtrVT = Op.getValueType();
2655 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
2656 SDLoc DL(GSDN);
2657 const GlobalValue *GV = GSDN->getGlobal();
2658
2659 // 64-bit SVR4 ABI code is always position-independent.
2660 // The actual address of the GlobalValue is stored in the TOC.
2661 if (Subtarget.isSVR4ABI() && Subtarget.isPPC64()) {
2662 setUsesTOCBasePtr(DAG);
2663 SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset());
2664 return getTOCEntry(DAG, DL, true, GA);
2665 }
2666
2667 unsigned MOHiFlag, MOLoFlag;
2668 bool IsPIC = isPositionIndependent();
2669 getLabelAccessInfo(IsPIC, Subtarget, MOHiFlag, MOLoFlag, GV);
2670
2671 if (IsPIC && Subtarget.isSVR4ABI()) {
2672 SDValue GA = DAG.getTargetGlobalAddress(GV, DL, PtrVT,
2673 GSDN->getOffset(),
2674 PPCII::MO_PIC_FLAG);
2675 return getTOCEntry(DAG, DL, false, GA);
2676 }
2677
2678 SDValue GAHi =
2679 DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOHiFlag);
2680 SDValue GALo =
2681 DAG.getTargetGlobalAddress(GV, DL, PtrVT, GSDN->getOffset(), MOLoFlag);
2682
2683 SDValue Ptr = LowerLabelRef(GAHi, GALo, IsPIC, DAG);
2684
2685 // If the global reference is actually to a non-lazy-pointer, we have to do an
2686 // extra load to get the address of the global.
2687 if (MOHiFlag & PPCII::MO_NLP_FLAG)
2688 Ptr = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), Ptr, MachinePointerInfo());
2689 return Ptr;
2690}
2691
2692SDValue PPCTargetLowering::LowerSETCC(SDValue Op, SelectionDAG &DAG) const {
2693 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(2))->get();
2694 SDLoc dl(Op);
2695
2696 if (Op.getValueType() == MVT::v2i64) {
2697 // When the operands themselves are v2i64 values, we need to do something
2698 // special because VSX has no underlying comparison operations for these.
2699 if (Op.getOperand(0).getValueType() == MVT::v2i64) {
2700 // Equality can be handled by casting to the legal type for Altivec
2701 // comparisons, everything else needs to be expanded.
2702 if (CC == ISD::SETEQ || CC == ISD::SETNE) {
2703 return DAG.getNode(ISD::BITCAST, dl, MVT::v2i64,
2704 DAG.getSetCC(dl, MVT::v4i32,
2705 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op.getOperand(0)),
2706 DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, Op.getOperand(1)),
2707 CC));
2708 }
2709
2710 return SDValue();
2711 }
2712
2713 // We handle most of these in the usual way.
2714 return Op;
2715 }
2716
2717 // If we're comparing for equality to zero, expose the fact that this is
2718 // implemented as a ctlz/srl pair on ppc, so that the dag combiner can
2719 // fold the new nodes.
2720 if (SDValue V = lowerCmpEqZeroToCtlzSrl(Op, DAG))
2721 return V;
2722
2723 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) {
2724 // Leave comparisons against 0 and -1 alone for now, since they're usually
2725 // optimized. FIXME: revisit this when we can custom lower all setcc
2726 // optimizations.
2727 if (C->isAllOnesValue() || C->isNullValue())
2728 return SDValue();
2729 }
2730
2731 // If we have an integer seteq/setne, turn it into a compare against zero
2732 // by xor'ing the rhs with the lhs, which is faster than setting a
2733 // condition register, reading it back out, and masking the correct bit. The
2734 // normal approach here uses sub to do this instead of xor. Using xor exposes
2735 // the result to other bit-twiddling opportunities.
2736 EVT LHSVT = Op.getOperand(0).getValueType();
2737 if (LHSVT.isInteger() && (CC == ISD::SETEQ || CC == ISD::SETNE)) {
2738 EVT VT = Op.getValueType();
2739 SDValue Sub = DAG.getNode(ISD::XOR, dl, LHSVT, Op.getOperand(0),
2740 Op.getOperand(1));
2741 return DAG.getSetCC(dl, VT, Sub, DAG.getConstant(0, dl, LHSVT), CC);
2742 }
2743 return SDValue();
2744}
2745
2746SDValue PPCTargetLowering::LowerVAARG(SDValue Op, SelectionDAG &DAG) const {
2747 SDNode *Node = Op.getNode();
2748 EVT VT = Node->getValueType(0);
2749 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2750 SDValue InChain = Node->getOperand(0);
2751 SDValue VAListPtr = Node->getOperand(1);
2752 const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
2753 SDLoc dl(Node);
2754
2755 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2755, __extension__ __PRETTY_FUNCTION__))
;
2756
2757 // gpr_index
2758 SDValue GprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain,
2759 VAListPtr, MachinePointerInfo(SV), MVT::i8);
2760 InChain = GprIndex.getValue(1);
2761
2762 if (VT == MVT::i64) {
2763 // Check if GprIndex is even
2764 SDValue GprAnd = DAG.getNode(ISD::AND, dl, MVT::i32, GprIndex,
2765 DAG.getConstant(1, dl, MVT::i32));
2766 SDValue CC64 = DAG.getSetCC(dl, MVT::i32, GprAnd,
2767 DAG.getConstant(0, dl, MVT::i32), ISD::SETNE);
2768 SDValue GprIndexPlusOne = DAG.getNode(ISD::ADD, dl, MVT::i32, GprIndex,
2769 DAG.getConstant(1, dl, MVT::i32));
2770 // Align GprIndex to be even if it isn't
2771 GprIndex = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC64, GprIndexPlusOne,
2772 GprIndex);
2773 }
2774
2775 // fpr index is 1 byte after gpr
2776 SDValue FprPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
2777 DAG.getConstant(1, dl, MVT::i32));
2778
2779 // fpr
2780 SDValue FprIndex = DAG.getExtLoad(ISD::ZEXTLOAD, dl, MVT::i32, InChain,
2781 FprPtr, MachinePointerInfo(SV), MVT::i8);
2782 InChain = FprIndex.getValue(1);
2783
2784 SDValue RegSaveAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
2785 DAG.getConstant(8, dl, MVT::i32));
2786
2787 SDValue OverflowAreaPtr = DAG.getNode(ISD::ADD, dl, PtrVT, VAListPtr,
2788 DAG.getConstant(4, dl, MVT::i32));
2789
2790 // areas
2791 SDValue OverflowArea =
2792 DAG.getLoad(MVT::i32, dl, InChain, OverflowAreaPtr, MachinePointerInfo());
2793 InChain = OverflowArea.getValue(1);
2794
2795 SDValue RegSaveArea =
2796 DAG.getLoad(MVT::i32, dl, InChain, RegSaveAreaPtr, MachinePointerInfo());
2797 InChain = RegSaveArea.getValue(1);
2798
2799 // select overflow_area if index > 8
2800 SDValue CC = DAG.getSetCC(dl, MVT::i32, VT.isInteger() ? GprIndex : FprIndex,
2801 DAG.getConstant(8, dl, MVT::i32), ISD::SETLT);
2802
2803 // adjustment constant gpr_index * 4/8
2804 SDValue RegConstant = DAG.getNode(ISD::MUL, dl, MVT::i32,
2805 VT.isInteger() ? GprIndex : FprIndex,
2806 DAG.getConstant(VT.isInteger() ? 4 : 8, dl,
2807 MVT::i32));
2808
2809 // OurReg = RegSaveArea + RegConstant
2810 SDValue OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, RegSaveArea,
2811 RegConstant);
2812
2813 // Floating types are 32 bytes into RegSaveArea
2814 if (VT.isFloatingPoint())
2815 OurReg = DAG.getNode(ISD::ADD, dl, PtrVT, OurReg,
2816 DAG.getConstant(32, dl, MVT::i32));
2817
2818 // increase {f,g}pr_index by 1 (or 2 if VT is i64)
2819 SDValue IndexPlus1 = DAG.getNode(ISD::ADD, dl, MVT::i32,
2820 VT.isInteger() ? GprIndex : FprIndex,
2821 DAG.getConstant(VT == MVT::i64 ? 2 : 1, dl,
2822 MVT::i32));
2823
2824 InChain = DAG.getTruncStore(InChain, dl, IndexPlus1,
2825 VT.isInteger() ? VAListPtr : FprPtr,
2826 MachinePointerInfo(SV), MVT::i8);
2827
2828 // determine if we should load from reg_save_area or overflow_area
2829 SDValue Result = DAG.getNode(ISD::SELECT, dl, PtrVT, CC, OurReg, OverflowArea);
2830
2831 // increase overflow_area by 4/8 if gpr/fpr > 8
2832 SDValue OverflowAreaPlusN = DAG.getNode(ISD::ADD, dl, PtrVT, OverflowArea,
2833 DAG.getConstant(VT.isInteger() ? 4 : 8,
2834 dl, MVT::i32));
2835
2836 OverflowArea = DAG.getNode(ISD::SELECT, dl, MVT::i32, CC, OverflowArea,
2837 OverflowAreaPlusN);
2838
2839 InChain = DAG.getTruncStore(InChain, dl, OverflowArea, OverflowAreaPtr,
2840 MachinePointerInfo(), MVT::i32);
2841
2842 return DAG.getLoad(VT, dl, InChain, Result, MachinePointerInfo());
2843}
2844
2845SDValue PPCTargetLowering::LowerVACOPY(SDValue Op, SelectionDAG &DAG) const {
2846 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 2846, __extension__ __PRETTY_FUNCTION__))
;
2847
2848 // We have to copy the entire va_list struct:
2849 // 2*sizeof(char) + 2 Byte alignment + 2*sizeof(char*) = 12 Byte
2850 return DAG.getMemcpy(Op.getOperand(0), Op,
2851 Op.getOperand(1), Op.getOperand(2),
2852 DAG.getConstant(12, SDLoc(Op), MVT::i32), 8, false, true,
2853 false, MachinePointerInfo(), MachinePointerInfo());
2854}
2855
2856SDValue PPCTargetLowering::LowerADJUST_TRAMPOLINE(SDValue Op,
2857 SelectionDAG &DAG) const {
2858 return Op.getOperand(0);
2859}
2860
2861SDValue PPCTargetLowering::LowerINIT_TRAMPOLINE(SDValue Op,
2862 SelectionDAG &DAG) const {
2863 SDValue Chain = Op.getOperand(0);
2864 SDValue Trmp = Op.getOperand(1); // trampoline
2865 SDValue FPtr = Op.getOperand(2); // nested function
2866 SDValue Nest = Op.getOperand(3); // 'nest' parameter value
2867 SDLoc dl(Op);
2868
2869 EVT PtrVT = getPointerTy(DAG.getDataLayout());
2870 bool isPPC64 = (PtrVT == MVT::i64);
2871 Type *IntPtrTy = DAG.getDataLayout().getIntPtrType(*DAG.getContext());
2872
2873 TargetLowering::ArgListTy Args;
2874 TargetLowering::ArgListEntry Entry;
2875
2876 Entry.Ty = IntPtrTy;
2877 Entry.Node = Trmp; Args.push_back(Entry);
2878
2879 // TrampSize == (isPPC64 ? 48 : 40);
2880 Entry.Node = DAG.getConstant(isPPC64 ? 48 : 40, dl,
2881 isPPC64 ? MVT::i64 : MVT::i32);
2882 Args.push_back(Entry);
2883
2884 Entry.Node = FPtr; Args.push_back(Entry);
2885 Entry.Node = Nest; Args.push_back(Entry);
2886
2887 // Lower to a call to __trampoline_setup(Trmp, TrampSize, FPtr, ctx_reg)
2888 TargetLowering::CallLoweringInfo CLI(DAG);
2889 CLI.setDebugLoc(dl).setChain(Chain).setLibCallee(
2890 CallingConv::C, Type::getVoidTy(*DAG.getContext()),
2891 DAG.getExternalSymbol("__trampoline_setup", PtrVT), std::move(Args));
2892
2893 std::pair<SDValue, SDValue> CallResult = LowerCallTo(CLI);
2894 return CallResult.second;
2895}
2896
2897SDValue PPCTargetLowering::LowerVASTART(SDValue Op, SelectionDAG &DAG) const {
2898 MachineFunction &MF = DAG.getMachineFunction();
2899 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
2900 EVT PtrVT = getPointerTy(MF.getDataLayout());
2901
2902 SDLoc dl(Op);
2903
2904 if (Subtarget.isDarwinABI() || Subtarget.isPPC64()) {
2905 // vastart just stores the address of the VarArgsFrameIndex slot into the
2906 // memory location argument.
2907 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2908 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2909 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2910 MachinePointerInfo(SV));
2911 }
2912
2913 // For the 32-bit SVR4 ABI we follow the layout of the va_list struct.
2914 // We suppose the given va_list is already allocated.
2915 //
2916 // typedef struct {
2917 // char gpr; /* index into the array of 8 GPRs
2918 // * stored in the register save area
2919 // * gpr=0 corresponds to r3,
2920 // * gpr=1 to r4, etc.
2921 // */
2922 // char fpr; /* index into the array of 8 FPRs
2923 // * stored in the register save area
2924 // * fpr=0 corresponds to f1,
2925 // * fpr=1 to f2, etc.
2926 // */
2927 // char *overflow_arg_area;
2928 // /* location on stack that holds
2929 // * the next overflow argument
2930 // */
2931 // char *reg_save_area;
2932 // /* where r3:r10 and f1:f8 (if saved)
2933 // * are stored
2934 // */
2935 // } va_list[1];
2936
2937 SDValue ArgGPR = DAG.getConstant(FuncInfo->getVarArgsNumGPR(), dl, MVT::i32);
2938 SDValue ArgFPR = DAG.getConstant(FuncInfo->getVarArgsNumFPR(), dl, MVT::i32);
2939 SDValue StackOffsetFI = DAG.getFrameIndex(FuncInfo->getVarArgsStackOffset(),
2940 PtrVT);
2941 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(),
2942 PtrVT);
2943
2944 uint64_t FrameOffset = PtrVT.getSizeInBits()/8;
2945 SDValue ConstFrameOffset = DAG.getConstant(FrameOffset, dl, PtrVT);
2946
2947 uint64_t StackOffset = PtrVT.getSizeInBits()/8 - 1;
2948 SDValue ConstStackOffset = DAG.getConstant(StackOffset, dl, PtrVT);
2949
2950 uint64_t FPROffset = 1;
2951 SDValue ConstFPROffset = DAG.getConstant(FPROffset, dl, PtrVT);
2952
2953 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2954
2955 // Store first byte : number of int regs
2956 SDValue firstStore =
2957 DAG.getTruncStore(Op.getOperand(0), dl, ArgGPR, Op.getOperand(1),
2958 MachinePointerInfo(SV), MVT::i8);
2959 uint64_t nextOffset = FPROffset;
2960 SDValue nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, Op.getOperand(1),
2961 ConstFPROffset);
2962
2963 // Store second byte : number of float regs
2964 SDValue secondStore =
2965 DAG.getTruncStore(firstStore, dl, ArgFPR, nextPtr,
2966 MachinePointerInfo(SV, nextOffset), MVT::i8);
2967 nextOffset += StackOffset;
2968 nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstStackOffset);
2969
2970 // Store second word : arguments given on stack
2971 SDValue thirdStore = DAG.getStore(secondStore, dl, StackOffsetFI, nextPtr,
2972 MachinePointerInfo(SV, nextOffset));
2973 nextOffset += FrameOffset;
2974 nextPtr = DAG.getNode(ISD::ADD, dl, PtrVT, nextPtr, ConstFrameOffset);
2975
2976 // Store third word : arguments given in registers
2977 return DAG.getStore(thirdStore, dl, FR, nextPtr,
2978 MachinePointerInfo(SV, nextOffset));
2979}
2980
2981#include "PPCGenCallingConv.inc"
2982
2983// Function whose sole purpose is to kill compiler warnings
2984// stemming from unused functions included from PPCGenCallingConv.inc.
2985CCAssignFn *PPCTargetLowering::useFastISelCCs(unsigned Flag) const {
2986 return Flag ? CC_PPC64_ELF_FIS : RetCC_PPC64_ELF_FIS;
2987}
2988
2989bool llvm::CC_PPC32_SVR4_Custom_Dummy(unsigned &ValNo, MVT &ValVT, MVT &LocVT,
2990 CCValAssign::LocInfo &LocInfo,
2991 ISD::ArgFlagsTy &ArgFlags,
2992 CCState &State) {
2993 return true;
2994}
2995
2996bool llvm::CC_PPC32_SVR4_Custom_AlignArgRegs(unsigned &ValNo, MVT &ValVT,
2997 MVT &LocVT,
2998 CCValAssign::LocInfo &LocInfo,
2999 ISD::ArgFlagsTy &ArgFlags,
3000 CCState &State) {
3001 static const MCPhysReg ArgRegs[] = {
3002 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
3003 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
3004 };
3005 const unsigned NumArgRegs = array_lengthof(ArgRegs);
3006
3007 unsigned RegNum = State.getFirstUnallocated(ArgRegs);
3008
3009 // Skip one register if the first unallocated register has an even register
3010 // number and there are still argument registers available which have not been
3011 // allocated yet. RegNum is actually an index into ArgRegs, which means we
3012 // need to skip a register if RegNum is odd.
3013 if (RegNum != NumArgRegs && RegNum % 2 == 1) {
3014 State.AllocateReg(ArgRegs[RegNum]);
3015 }
3016
3017 // Always return false here, as this function only makes sure that the first
3018 // unallocated register has an odd register number and does not actually
3019 // allocate a register for the current argument.
3020 return false;
3021}
3022
3023bool
3024llvm::CC_PPC32_SVR4_Custom_SkipLastArgRegsPPCF128(unsigned &ValNo, MVT &ValVT,
3025 MVT &LocVT,
3026 CCValAssign::LocInfo &LocInfo,
3027 ISD::ArgFlagsTy &ArgFlags,
3028 CCState &State) {
3029 static const MCPhysReg ArgRegs[] = {
3030 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
3031 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
3032 };
3033 const unsigned NumArgRegs = array_lengthof(ArgRegs);
3034
3035 unsigned RegNum = State.getFirstUnallocated(ArgRegs);
3036 int RegsLeft = NumArgRegs - RegNum;
3037
3038 // Skip if there is not enough registers left for long double type (4 gpr regs
3039 // in soft float mode) and put long double argument on the stack.
3040 if (RegNum != NumArgRegs && RegsLeft < 4) {
3041 for (int i = 0; i < RegsLeft; i++) {
3042 State.AllocateReg(ArgRegs[RegNum + i]);
3043 }
3044 }
3045
3046 return false;
3047}
3048
3049bool llvm::CC_PPC32_SVR4_Custom_AlignFPArgRegs(unsigned &ValNo, MVT &ValVT,
3050 MVT &LocVT,
3051 CCValAssign::LocInfo &LocInfo,
3052 ISD::ArgFlagsTy &ArgFlags,
3053 CCState &State) {
3054 static const MCPhysReg ArgRegs[] = {
3055 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
3056 PPC::F8
3057 };
3058
3059 const unsigned NumArgRegs = array_lengthof(ArgRegs);
3060
3061 unsigned RegNum = State.getFirstUnallocated(ArgRegs);
3062
3063 // If there is only one Floating-point register left we need to put both f64
3064 // values of a split ppc_fp128 value on the stack.
3065 if (RegNum != NumArgRegs && ArgRegs[RegNum] == PPC::F8) {
3066 State.AllocateReg(ArgRegs[RegNum]);
3067 }
3068
3069 // Always return false here, as this function only makes sure that the two f64
3070 // values a ppc_fp128 value is split into are both passed in registers or both
3071 // passed on the stack and does not actually allocate a register for the
3072 // current argument.
3073 return false;
3074}
3075
3076/// FPR - The set of FP registers that should be allocated for arguments,
3077/// on Darwin.
3078static const MCPhysReg FPR[] = {PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5,
3079 PPC::F6, PPC::F7, PPC::F8, PPC::F9, PPC::F10,
3080 PPC::F11, PPC::F12, PPC::F13};
3081
3082/// QFPR - The set of QPX registers that should be allocated for arguments.
3083static const MCPhysReg QFPR[] = {
3084 PPC::QF1, PPC::QF2, PPC::QF3, PPC::QF4, PPC::QF5, PPC::QF6, PPC::QF7,
3085 PPC::QF8, PPC::QF9, PPC::QF10, PPC::QF11, PPC::QF12, PPC::QF13};
3086
3087/// CalculateStackSlotSize - Calculates the size reserved for this argument on
3088/// the stack.
3089static unsigned CalculateStackSlotSize(EVT ArgVT, ISD::ArgFlagsTy Flags,
3090 unsigned PtrByteSize) {
3091 unsigned ArgSize = ArgVT.getStoreSize();
3092 if (Flags.isByVal())
3093 ArgSize = Flags.getByValSize();
3094
3095 // Round up to multiples of the pointer size, except for array members,
3096 // which are always packed.
3097 if (!Flags.isInConsecutiveRegs())
3098 ArgSize = ((ArgSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
3099
3100 return ArgSize;
3101}
3102
3103/// CalculateStackSlotAlignment - Calculates the alignment of this argument
3104/// on the stack.
3105static unsigned CalculateStackSlotAlignment(EVT ArgVT, EVT OrigVT,
3106 ISD::ArgFlagsTy Flags,
3107 unsigned PtrByteSize) {
3108 unsigned Align = PtrByteSize;
3109
3110 // Altivec parameters are padded to a 16 byte boundary.
3111 if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 ||
3112 ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 ||
3113 ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64 ||
3114 ArgVT == MVT::v1i128)
3115 Align = 16;
3116 // QPX vector types stored in double-precision are padded to a 32 byte
3117 // boundary.
3118 else if (ArgVT == MVT::v4f64 || ArgVT == MVT::v4i1)
3119 Align = 32;
3120
3121 // ByVal parameters are aligned as requested.
3122 if (Flags.isByVal()) {
3123 unsigned BVAlign = Flags.getByValAlign();
3124 if (BVAlign > PtrByteSize) {
3125 if (BVAlign % PtrByteSize != 0)
3126 llvm_unreachable(::llvm::llvm_unreachable_internal("ByVal alignment is not a multiple of the pointer size"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3127)
3127 "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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3127)
;
3128
3129 Align = BVAlign;
3130 }
3131 }
3132
3133 // Array members are always packed to their original alignment.
3134 if (Flags.isInConsecutiveRegs()) {
3135 // If the array member was split into multiple registers, the first
3136 // needs to be aligned to the size of the full type. (Except for
3137 // ppcf128, which is only aligned as its f64 components.)
3138 if (Flags.isSplit() && OrigVT != MVT::ppcf128)
3139 Align = OrigVT.getStoreSize();
3140 else
3141 Align = ArgVT.getStoreSize();
3142 }
3143
3144 return Align;
3145}
3146
3147/// CalculateStackSlotUsed - Return whether this argument will use its
3148/// stack slot (instead of being passed in registers). ArgOffset,
3149/// AvailableFPRs, and AvailableVRs must hold the current argument
3150/// position, and will be updated to account for this argument.
3151static bool CalculateStackSlotUsed(EVT ArgVT, EVT OrigVT,
3152 ISD::ArgFlagsTy Flags,
3153 unsigned PtrByteSize,
3154 unsigned LinkageSize,
3155 unsigned ParamAreaSize,
3156 unsigned &ArgOffset,
3157 unsigned &AvailableFPRs,
3158 unsigned &AvailableVRs, bool HasQPX) {
3159 bool UseMemory = false;
3160
3161 // Respect alignment of argument on the stack.
3162 unsigned Align =
3163 CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
3164 ArgOffset = ((ArgOffset + Align - 1) / Align) * Align;
3165 // If there's no space left in the argument save area, we must
3166 // use memory (this check also catches zero-sized arguments).
3167 if (ArgOffset >= LinkageSize + ParamAreaSize)
3168 UseMemory = true;
3169
3170 // Allocate argument on the stack.
3171 ArgOffset += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
3172 if (Flags.isInConsecutiveRegsLast())
3173 ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
3174 // If we overran the argument save area, we must use memory
3175 // (this check catches arguments passed partially in memory)
3176 if (ArgOffset > LinkageSize + ParamAreaSize)
3177 UseMemory = true;
3178
3179 // However, if the argument is actually passed in an FPR or a VR,
3180 // we don't use memory after all.
3181 if (!Flags.isByVal()) {
3182 if (ArgVT == MVT::f32 || ArgVT == MVT::f64 ||
3183 // QPX registers overlap with the scalar FP registers.
3184 (HasQPX && (ArgVT == MVT::v4f32 ||
3185 ArgVT == MVT::v4f64 ||
3186 ArgVT == MVT::v4i1)))
3187 if (AvailableFPRs > 0) {
3188 --AvailableFPRs;
3189 return false;
3190 }
3191 if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 ||
3192 ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 ||
3193 ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64 ||
3194 ArgVT == MVT::v1i128)
3195 if (AvailableVRs > 0) {
3196 --AvailableVRs;
3197 return false;
3198 }
3199 }
3200
3201 return UseMemory;
3202}
3203
3204/// EnsureStackAlignment - Round stack frame size up from NumBytes to
3205/// ensure minimum alignment required for target.
3206static unsigned EnsureStackAlignment(const PPCFrameLowering *Lowering,
3207 unsigned NumBytes) {
3208 unsigned TargetAlign = Lowering->getStackAlignment();
3209 unsigned AlignMask = TargetAlign - 1;
3210 NumBytes = (NumBytes + AlignMask) & ~AlignMask;
3211 return NumBytes;
3212}
3213
3214SDValue PPCTargetLowering::LowerFormalArguments(
3215 SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
3216 const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
3217 SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {
3218 if (Subtarget.isSVR4ABI()) {
3219 if (Subtarget.isPPC64())
3220 return LowerFormalArguments_64SVR4(Chain, CallConv, isVarArg, Ins,
3221 dl, DAG, InVals);
3222 else
3223 return LowerFormalArguments_32SVR4(Chain, CallConv, isVarArg, Ins,
3224 dl, DAG, InVals);
3225 } else {
3226 return LowerFormalArguments_Darwin(Chain, CallConv, isVarArg, Ins,
3227 dl, DAG, InVals);
3228 }
3229}
3230
3231SDValue PPCTargetLowering::LowerFormalArguments_32SVR4(
3232 SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
3233 const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
3234 SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {
3235
3236 // 32-bit SVR4 ABI Stack Frame Layout:
3237 // +-----------------------------------+
3238 // +--> | Back chain |
3239 // | +-----------------------------------+
3240 // | | Floating-point register save area |
3241 // | +-----------------------------------+
3242 // | | General register save area |
3243 // | +-----------------------------------+
3244 // | | CR save word |
3245 // | +-----------------------------------+
3246 // | | VRSAVE save word |
3247 // | +-----------------------------------+
3248 // | | Alignment padding |
3249 // | +-----------------------------------+
3250 // | | Vector register save area |
3251 // | +-----------------------------------+
3252 // | | Local variable space |
3253 // | +-----------------------------------+
3254 // | | Parameter list area |
3255 // | +-----------------------------------+
3256 // | | LR save word |
3257 // | +-----------------------------------+
3258 // SP--> +--- | Back chain |
3259 // +-----------------------------------+
3260 //
3261 // Specifications:
3262 // System V Application Binary Interface PowerPC Processor Supplement
3263 // AltiVec Technology Programming Interface Manual
3264
3265 MachineFunction &MF = DAG.getMachineFunction();
3266 MachineFrameInfo &MFI = MF.getFrameInfo();
3267 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
3268
3269 EVT PtrVT = getPointerTy(MF.getDataLayout());
3270 // Potential tail calls could cause overwriting of argument stack slots.
3271 bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
3272 (CallConv == CallingConv::Fast));
3273 unsigned PtrByteSize = 4;
3274
3275 // Assign locations to all of the incoming arguments.
3276 SmallVector<CCValAssign, 16> ArgLocs;
3277 PPCCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), ArgLocs,
3278 *DAG.getContext());
3279
3280 // Reserve space for the linkage area on the stack.
3281 unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
3282 CCInfo.AllocateStack(LinkageSize, PtrByteSize);
3283 if (useSoftFloat())
3284 CCInfo.PreAnalyzeFormalArguments(Ins);
3285
3286 CCInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4);
3287 CCInfo.clearWasPPCF128();
3288
3289 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
3290 CCValAssign &VA = ArgLocs[i];
3291
3292 // Arguments stored in registers.
3293 if (VA.isRegLoc()) {
3294 const TargetRegisterClass *RC;
3295 EVT ValVT = VA.getValVT();
3296
3297 switch (ValVT.getSimpleVT().SimpleTy) {
3298 default:
3299 llvm_unreachable("ValVT not supported by formal arguments Lowering")::llvm::llvm_unreachable_internal("ValVT not supported by formal arguments Lowering"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3299)
;
3300 case MVT::i1:
3301 case MVT::i32:
3302 RC = &PPC::GPRCRegClass;
3303 break;
3304 case MVT::f32:
3305 if (Subtarget.hasP8Vector())
3306 RC = &PPC::VSSRCRegClass;
3307 else
3308 RC = &PPC::F4RCRegClass;
3309 break;
3310 case MVT::f64:
3311 if (Subtarget.hasVSX())
3312 RC = &PPC::VSFRCRegClass;
3313 else
3314 RC = &PPC::F8RCRegClass;
3315 break;
3316 case MVT::v16i8:
3317 case MVT::v8i16:
3318 case MVT::v4i32:
3319 RC = &PPC::VRRCRegClass;
3320 break;
3321 case MVT::v4f32:
3322 RC = Subtarget.hasQPX() ? &PPC::QSRCRegClass : &PPC::VRRCRegClass;
3323 break;
3324 case MVT::v2f64:
3325 case MVT::v2i64:
3326 RC = &PPC::VRRCRegClass;
3327 break;
3328 case MVT::v4f64:
3329 RC = &PPC::QFRCRegClass;
3330 break;
3331 case MVT::v4i1:
3332 RC = &PPC::QBRCRegClass;
3333 break;
3334 }
3335
3336 // Transform the arguments stored in physical registers into virtual ones.
3337 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
3338 SDValue ArgValue = DAG.getCopyFromReg(Chain, dl, Reg,
3339 ValVT == MVT::i1 ? MVT::i32 : ValVT);
3340
3341 if (ValVT == MVT::i1)
3342 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, ArgValue);
3343
3344 InVals.push_back(ArgValue);
3345 } else {
3346 // Argument stored in memory.
3347 assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail
("VA.isMemLoc()", "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3347, __extension__ __PRETTY_FUNCTION__))
;
3348
3349 unsigned ArgSize = VA.getLocVT().getStoreSize();
3350 int FI = MFI.CreateFixedObject(ArgSize, VA.getLocMemOffset(),
3351 isImmutable);
3352
3353 // Create load nodes to retrieve arguments from the stack.
3354 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3355 InVals.push_back(
3356 DAG.getLoad(VA.getValVT(), dl, Chain, FIN, MachinePointerInfo()));
3357 }
3358 }
3359
3360 // Assign locations to all of the incoming aggregate by value arguments.
3361 // Aggregates passed by value are stored in the local variable space of the
3362 // caller's stack frame, right above the parameter list area.
3363 SmallVector<CCValAssign, 16> ByValArgLocs;
3364 CCState CCByValInfo(CallConv, isVarArg, DAG.getMachineFunction(),
3365 ByValArgLocs, *DAG.getContext());
3366
3367 // Reserve stack space for the allocations in CCInfo.
3368 CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrByteSize);
3369
3370 CCByValInfo.AnalyzeFormalArguments(Ins, CC_PPC32_SVR4_ByVal);
3371
3372 // Area that is at least reserved in the caller of this function.
3373 unsigned MinReservedArea = CCByValInfo.getNextStackOffset();
3374 MinReservedArea = std::max(MinReservedArea, LinkageSize);
3375
3376 // Set the size that is at least reserved in caller of this function. Tail
3377 // call optimized function's reserved stack space needs to be aligned so that
3378 // taking the difference between two stack areas will result in an aligned
3379 // stack.
3380 MinReservedArea =
3381 EnsureStackAlignment(Subtarget.getFrameLowering(), MinReservedArea);
3382 FuncInfo->setMinReservedArea(MinReservedArea);
3383
3384 SmallVector<SDValue, 8> MemOps;
3385
3386 // If the function takes variable number of arguments, make a frame index for
3387 // the start of the first vararg value... for expansion of llvm.va_start.
3388 if (isVarArg) {
3389 static const MCPhysReg GPArgRegs[] = {
3390 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
3391 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
3392 };
3393 const unsigned NumGPArgRegs = array_lengthof(GPArgRegs);
3394
3395 static const MCPhysReg FPArgRegs[] = {
3396 PPC::F1, PPC::F2, PPC::F3, PPC::F4, PPC::F5, PPC::F6, PPC::F7,
3397 PPC::F8
3398 };
3399 unsigned NumFPArgRegs = array_lengthof(FPArgRegs);
3400
3401 if (useSoftFloat())
3402 NumFPArgRegs = 0;
3403
3404 FuncInfo->setVarArgsNumGPR(CCInfo.getFirstUnallocated(GPArgRegs));
3405 FuncInfo->setVarArgsNumFPR(CCInfo.getFirstUnallocated(FPArgRegs));
3406
3407 // Make room for NumGPArgRegs and NumFPArgRegs.
3408 int Depth = NumGPArgRegs * PtrVT.getSizeInBits()/8 +
3409 NumFPArgRegs * MVT(MVT::f64).getSizeInBits()/8;
3410
3411 FuncInfo->setVarArgsStackOffset(
3412 MFI.CreateFixedObject(PtrVT.getSizeInBits()/8,
3413 CCInfo.getNextStackOffset(), true));
3414
3415 FuncInfo->setVarArgsFrameIndex(MFI.CreateStackObject(Depth, 8, false));
3416 SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
3417
3418 // The fixed integer arguments of a variadic function are stored to the
3419 // VarArgsFrameIndex on the stack so that they may be loaded by
3420 // dereferencing the result of va_next.
3421 for (unsigned GPRIndex = 0; GPRIndex != NumGPArgRegs; ++GPRIndex) {
3422 // Get an existing live-in vreg, or add a new one.
3423 unsigned VReg = MF.getRegInfo().getLiveInVirtReg(GPArgRegs[GPRIndex]);
3424 if (!VReg)
3425 VReg = MF.addLiveIn(GPArgRegs[GPRIndex], &PPC::GPRCRegClass);
3426
3427 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
3428 SDValue Store =
3429 DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
3430 MemOps.push_back(Store);
3431 // Increment the address by four for the next argument to store
3432 SDValue PtrOff = DAG.getConstant(PtrVT.getSizeInBits()/8, dl, PtrVT);
3433 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
3434 }
3435
3436 // FIXME 32-bit SVR4: We only need to save FP argument registers if CR bit 6
3437 // is set.
3438 // The double arguments are stored to the VarArgsFrameIndex
3439 // on the stack.
3440 for (unsigned FPRIndex = 0; FPRIndex != NumFPArgRegs; ++FPRIndex) {
3441 // Get an existing live-in vreg, or add a new one.
3442 unsigned VReg = MF.getRegInfo().getLiveInVirtReg(FPArgRegs[FPRIndex]);
3443 if (!VReg)
3444 VReg = MF.addLiveIn(FPArgRegs[FPRIndex], &PPC::F8RCRegClass);
3445
3446 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::f64);
3447 SDValue Store =
3448 DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
3449 MemOps.push_back(Store);
3450 // Increment the address by eight for the next argument to store
3451 SDValue PtrOff = DAG.getConstant(MVT(MVT::f64).getSizeInBits()/8, dl,
3452 PtrVT);
3453 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
3454 }
3455 }
3456
3457 if (!MemOps.empty())
3458 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
3459
3460 return Chain;
3461}
3462
3463// PPC64 passes i8, i16, and i32 values in i64 registers. Promote
3464// value to MVT::i64 and then truncate to the correct register size.
3465SDValue PPCTargetLowering::extendArgForPPC64(ISD::ArgFlagsTy Flags,
3466 EVT ObjectVT, SelectionDAG &DAG,
3467 SDValue ArgVal,
3468 const SDLoc &dl) const {
3469 if (Flags.isSExt())
3470 ArgVal = DAG.getNode(ISD::AssertSext, dl, MVT::i64, ArgVal,
3471 DAG.getValueType(ObjectVT));
3472 else if (Flags.isZExt())
3473 ArgVal = DAG.getNode(ISD::AssertZext, dl, MVT::i64, ArgVal,
3474 DAG.getValueType(ObjectVT));
3475
3476 return DAG.getNode(ISD::TRUNCATE, dl, ObjectVT, ArgVal);
3477}
3478
3479SDValue PPCTargetLowering::LowerFormalArguments_64SVR4(
3480 SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
3481 const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
3482 SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {
3483 // TODO: add description of PPC stack frame format, or at least some docs.
3484 //
3485 bool isELFv2ABI = Subtarget.isELFv2ABI();
3486 bool isLittleEndian = Subtarget.isLittleEndian();
3487 MachineFunction &MF = DAG.getMachineFunction();
3488 MachineFrameInfo &MFI = MF.getFrameInfo();
3489 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
3490
3491 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3492, __extension__ __PRETTY_FUNCTION__))
3492 "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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3492, __extension__ __PRETTY_FUNCTION__))
;
3493
3494 EVT PtrVT = getPointerTy(MF.getDataLayout());
3495 // Potential tail calls could cause overwriting of argument stack slots.
3496 bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
3497 (CallConv == CallingConv::Fast));
3498 unsigned PtrByteSize = 8;
3499 unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
3500
3501 static const MCPhysReg GPR[] = {
3502 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
3503 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
3504 };
3505 static const MCPhysReg VR[] = {
3506 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
3507 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
3508 };
3509
3510 const unsigned Num_GPR_Regs = array_lengthof(GPR);
3511 const unsigned Num_FPR_Regs = useSoftFloat() ? 0 : 13;
3512 const unsigned Num_VR_Regs = array_lengthof(VR);
3513 const unsigned Num_QFPR_Regs = Num_FPR_Regs;
3514
3515 // Do a first pass over the arguments to determine whether the ABI
3516 // guarantees that our caller has allocated the parameter save area
3517 // on its stack frame. In the ELFv1 ABI, this is always the case;
3518 // in the ELFv2 ABI, it is true if this is a vararg function or if
3519 // any parameter is located in a stack slot.
3520
3521 bool HasParameterArea = !isELFv2ABI || isVarArg;
3522 unsigned ParamAreaSize = Num_GPR_Regs * PtrByteSize;
3523 unsigned NumBytes = LinkageSize;
3524 unsigned AvailableFPRs = Num_FPR_Regs;
3525 unsigned AvailableVRs = Num_VR_Regs;
3526 for (unsigned i = 0, e = Ins.size(); i != e; ++i) {
3527 if (Ins[i].Flags.isNest())
3528 continue;
3529
3530 if (CalculateStackSlotUsed(Ins[i].VT, Ins[i].ArgVT, Ins[i].Flags,
3531 PtrByteSize, LinkageSize, ParamAreaSize,
3532 NumBytes, AvailableFPRs, AvailableVRs,
3533 Subtarget.hasQPX()))
3534 HasParameterArea = true;
3535 }
3536
3537 // Add DAG nodes to load the arguments or copy them out of registers. On
3538 // entry to a function on PPC, the arguments start after the linkage area,
3539 // although the first ones are often in registers.
3540
3541 unsigned ArgOffset = LinkageSize;
3542 unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
3543 unsigned &QFPR_idx = FPR_idx;
3544 SmallVector<SDValue, 8> MemOps;
3545 Function::const_arg_iterator FuncArg = MF.getFunction().arg_begin();
3546 unsigned CurArgIdx = 0;
3547 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo) {
3548 SDValue ArgVal;
3549 bool needsLoad = false;
3550 EVT ObjectVT = Ins[ArgNo].VT;
3551 EVT OrigVT = Ins[ArgNo].ArgVT;
3552 unsigned ObjSize = ObjectVT.getStoreSize();
3553 unsigned ArgSize = ObjSize;
3554 ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
3555 if (Ins[ArgNo].isOrigArg()) {
3556 std::advance(FuncArg, Ins[ArgNo].getOrigArgIndex() - CurArgIdx);
3557 CurArgIdx = Ins[ArgNo].getOrigArgIndex();
3558 }
3559 // We re-align the argument offset for each argument, except when using the
3560 // fast calling convention, when we need to make sure we do that only when
3561 // we'll actually use a stack slot.
3562 unsigned CurArgOffset, Align;
3563 auto ComputeArgOffset = [&]() {
3564 /* Respect alignment of argument on the stack. */
3565 Align = CalculateStackSlotAlignment(ObjectVT, OrigVT, Flags, PtrByteSize);
3566 ArgOffset = ((ArgOffset + Align - 1) / Align) * Align;
3567 CurArgOffset = ArgOffset;
3568 };
3569
3570 if (CallConv != CallingConv::Fast) {
3571 ComputeArgOffset();
3572
3573 /* Compute GPR index associated with argument offset. */
3574 GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
3575 GPR_idx = std::min(GPR_idx, Num_GPR_Regs);
3576 }
3577
3578 // FIXME the codegen can be much improved in some cases.
3579 // We do not have to keep everything in memory.
3580 if (Flags.isByVal()) {
3581 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3581, __extension__ __PRETTY_FUNCTION__))
;
3582
3583 if (CallConv == CallingConv::Fast)
3584 ComputeArgOffset();
3585
3586 // ObjSize is the true size, ArgSize rounded up to multiple of registers.
3587 ObjSize = Flags.getByValSize();
3588 ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
3589 // Empty aggregate parameters do not take up registers. Examples:
3590 // struct { } a;
3591 // union { } b;
3592 // int c[0];
3593 // etc. However, we have to provide a place-holder in InVals, so
3594 // pretend we have an 8-byte item at the current address for that
3595 // purpose.
3596 if (!ObjSize) {
3597 int FI = MFI.CreateFixedObject(PtrByteSize, ArgOffset, true);
3598 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3599 InVals.push_back(FIN);
3600 continue;
3601 }
3602
3603 // Create a stack object covering all stack doublewords occupied
3604 // by the argument. If the argument is (fully or partially) on
3605 // the stack, or if the argument is fully in registers but the
3606 // caller has allocated the parameter save anyway, we can refer
3607 // directly to the caller's stack frame. Otherwise, create a
3608 // local copy in our own frame.
3609 int FI;
3610 if (HasParameterArea ||
3611 ArgSize + ArgOffset > LinkageSize + Num_GPR_Regs * PtrByteSize)
3612 FI = MFI.CreateFixedObject(ArgSize, ArgOffset, false, true);
3613 else
3614 FI = MFI.CreateStackObject(ArgSize, Align, false);
3615 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3616
3617 // Handle aggregates smaller than 8 bytes.
3618 if (ObjSize < PtrByteSize) {
3619 // The value of the object is its address, which differs from the
3620 // address of the enclosing doubleword on big-endian systems.
3621 SDValue Arg = FIN;
3622 if (!isLittleEndian) {
3623 SDValue ArgOff = DAG.getConstant(PtrByteSize - ObjSize, dl, PtrVT);
3624 Arg = DAG.getNode(ISD::ADD, dl, ArgOff.getValueType(), Arg, ArgOff);
3625 }
3626 InVals.push_back(Arg);
3627
3628 if (GPR_idx != Num_GPR_Regs) {
3629 unsigned VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass);
3630 FuncInfo->addLiveInAttr(VReg, Flags);
3631 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
3632 SDValue Store;
3633
3634 if (ObjSize==1 || ObjSize==2 || ObjSize==4) {
3635 EVT ObjType = (ObjSize == 1 ? MVT::i8 :
3636 (ObjSize == 2 ? MVT::i16 : MVT::i32));
3637 Store = DAG.getTruncStore(Val.getValue(1), dl, Val, Arg,
3638 MachinePointerInfo(&*FuncArg), ObjType);
3639 } else {
3640 // For sizes that don't fit a truncating store (3, 5, 6, 7),
3641 // store the whole register as-is to the parameter save area
3642 // slot.
3643 Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
3644 MachinePointerInfo(&*FuncArg));
3645 }
3646
3647 MemOps.push_back(Store);
3648 }
3649 // Whether we copied from a register or not, advance the offset
3650 // into the parameter save area by a full doubleword.
3651 ArgOffset += PtrByteSize;
3652 continue;
3653 }
3654
3655 // The value of the object is its address, which is the address of
3656 // its first stack doubleword.
3657 InVals.push_back(FIN);
3658
3659 // Store whatever pieces of the object are in registers to memory.
3660 for (unsigned j = 0; j < ArgSize; j += PtrByteSize) {
3661 if (GPR_idx == Num_GPR_Regs)
3662 break;
3663
3664 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
3665 FuncInfo->addLiveInAttr(VReg, Flags);
3666 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
3667 SDValue Addr = FIN;
3668 if (j) {
3669 SDValue Off = DAG.getConstant(j, dl, PtrVT);
3670 Addr = DAG.getNode(ISD::ADD, dl, Off.getValueType(), Addr, Off);
3671 }
3672 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, Addr,
3673 MachinePointerInfo(&*FuncArg, j));
3674 MemOps.push_back(Store);
3675 ++GPR_idx;
3676 }
3677 ArgOffset += ArgSize;
3678 continue;
3679 }
3680
3681 switch (ObjectVT.getSimpleVT().SimpleTy) {
3682 default: llvm_unreachable("Unhandled argument type!")::llvm::llvm_unreachable_internal("Unhandled argument type!",
"/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3682)
;
3683 case MVT::i1:
3684 case MVT::i32:
3685 case MVT::i64:
3686 if (Flags.isNest()) {
3687 // The 'nest' parameter, if any, is passed in R11.
3688 unsigned VReg = MF.addLiveIn(PPC::X11, &PPC::G8RCRegClass);
3689 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
3690
3691 if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1)
3692 ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl);
3693
3694 break;
3695 }
3696
3697 // These can be scalar arguments or elements of an integer array type
3698 // passed directly. Clang may use those instead of "byval" aggregate
3699 // types to avoid forcing arguments to memory unnecessarily.
3700 if (GPR_idx != Num_GPR_Regs) {
3701 unsigned VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass);
3702 FuncInfo->addLiveInAttr(VReg, Flags);
3703 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
3704
3705 if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1)
3706 // PPC64 passes i8, i16, and i32 values in i64 registers. Promote
3707 // value to MVT::i64 and then truncate to the correct register size.
3708 ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl);
3709 } else {
3710 if (CallConv == CallingConv::Fast)
3711 ComputeArgOffset();
3712
3713 needsLoad = true;
3714 ArgSize = PtrByteSize;
3715 }
3716 if (CallConv != CallingConv::Fast || needsLoad)
3717 ArgOffset += 8;
3718 break;
3719
3720 case MVT::f32:
3721 case MVT::f64:
3722 // These can be scalar arguments or elements of a float array type
3723 // passed directly. The latter are used to implement ELFv2 homogenous
3724 // float aggregates.
3725 if (FPR_idx != Num_FPR_Regs) {
3726 unsigned VReg;
3727
3728 if (ObjectVT == MVT::f32)
3729 VReg = MF.addLiveIn(FPR[FPR_idx],
3730 Subtarget.hasP8Vector()
3731 ? &PPC::VSSRCRegClass
3732 : &PPC::F4RCRegClass);
3733 else
3734 VReg = MF.addLiveIn(FPR[FPR_idx], Subtarget.hasVSX()
3735 ? &PPC::VSFRCRegClass
3736 : &PPC::F8RCRegClass);
3737
3738 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
3739 ++FPR_idx;
3740 } else if (GPR_idx != Num_GPR_Regs && CallConv != CallingConv::Fast) {
3741 // FIXME: We may want to re-enable this for CallingConv::Fast on the P8
3742 // once we support fp <-> gpr moves.
3743
3744 // This can only ever happen in the presence of f32 array types,
3745 // since otherwise we never run out of FPRs before running out
3746 // of GPRs.
3747 unsigned VReg = MF.addLiveIn(GPR[GPR_idx++], &PPC::G8RCRegClass);
3748 FuncInfo->addLiveInAttr(VReg, Flags);
3749 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
3750
3751 if (ObjectVT == MVT::f32) {
3752 if ((ArgOffset % PtrByteSize) == (isLittleEndian ? 4 : 0))
3753 ArgVal = DAG.getNode(ISD::SRL, dl, MVT::i64, ArgVal,
3754 DAG.getConstant(32, dl, MVT::i32));
3755 ArgVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, ArgVal);
3756 }
3757
3758 ArgVal = DAG.getNode(ISD::BITCAST, dl, ObjectVT, ArgVal);
3759 } else {
3760 if (CallConv == CallingConv::Fast)
3761 ComputeArgOffset();
3762
3763 needsLoad = true;
3764 }
3765
3766 // When passing an array of floats, the array occupies consecutive
3767 // space in the argument area; only round up to the next doubleword
3768 // at the end of the array. Otherwise, each float takes 8 bytes.
3769 if (CallConv != CallingConv::Fast || needsLoad) {
3770 ArgSize = Flags.isInConsecutiveRegs() ? ObjSize : PtrByteSize;
3771 ArgOffset += ArgSize;
3772 if (Flags.isInConsecutiveRegsLast())
3773 ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
3774 }
3775 break;
3776 case MVT::v4f32:
3777 case MVT::v4i32:
3778 case MVT::v8i16:
3779 case MVT::v16i8:
3780 case MVT::v2f64:
3781 case MVT::v2i64:
3782 case MVT::v1i128:
3783 if (!Subtarget.hasQPX()) {
3784 // These can be scalar arguments or elements of a vector array type
3785 // passed directly. The latter are used to implement ELFv2 homogenous
3786 // vector aggregates.
3787 if (VR_idx != Num_VR_Regs) {
3788 unsigned VReg = MF.addLiveIn(VR[VR_idx], &PPC::VRRCRegClass);
3789 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
3790 ++VR_idx;
3791 } else {
3792 if (CallConv == CallingConv::Fast)
3793 ComputeArgOffset();
3794
3795 needsLoad = true;
3796 }
3797 if (CallConv != CallingConv::Fast || needsLoad)
3798 ArgOffset += 16;
3799 break;
3800 } // not QPX
3801
3802 assert(ObjectVT.getSimpleVT().SimpleTy == MVT::v4f32 &&(static_cast <bool> (ObjectVT.getSimpleVT().SimpleTy ==
MVT::v4f32 && "Invalid QPX parameter type") ? void (
0) : __assert_fail ("ObjectVT.getSimpleVT().SimpleTy == MVT::v4f32 && \"Invalid QPX parameter type\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3803, __extension__ __PRETTY_FUNCTION__))
3803 "Invalid QPX parameter type")(static_cast <bool> (ObjectVT.getSimpleVT().SimpleTy ==
MVT::v4f32 && "Invalid QPX parameter type") ? void (
0) : __assert_fail ("ObjectVT.getSimpleVT().SimpleTy == MVT::v4f32 && \"Invalid QPX parameter type\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3803, __extension__ __PRETTY_FUNCTION__))
;
3804 /* fall through */
3805
3806 case MVT::v4f64:
3807 case MVT::v4i1:
3808 // QPX vectors are treated like their scalar floating-point subregisters
3809 // (except that they're larger).
3810 unsigned Sz = ObjectVT.getSimpleVT().SimpleTy == MVT::v4f32 ? 16 : 32;
3811 if (QFPR_idx != Num_QFPR_Regs) {
3812 const TargetRegisterClass *RC;
3813 switch (ObjectVT.getSimpleVT().SimpleTy) {
3814 case MVT::v4f64: RC = &PPC::QFRCRegClass; break;
3815 case MVT::v4f32: RC = &PPC::QSRCRegClass; break;
3816 default: RC = &PPC::QBRCRegClass; break;
3817 }
3818
3819 unsigned VReg = MF.addLiveIn(QFPR[QFPR_idx], RC);
3820 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
3821 ++QFPR_idx;
3822 } else {
3823 if (CallConv == CallingConv::Fast)
3824 ComputeArgOffset();
3825 needsLoad = true;
3826 }
3827 if (CallConv != CallingConv::Fast || needsLoad)
3828 ArgOffset += Sz;
3829 break;
3830 }
3831
3832 // We need to load the argument to a virtual register if we determined
3833 // above that we ran out of physical registers of the appropriate type.
3834 if (needsLoad) {
3835 if (ObjSize < ArgSize && !isLittleEndian)
3836 CurArgOffset += ArgSize - ObjSize;
3837 int FI = MFI.CreateFixedObject(ObjSize, CurArgOffset, isImmutable);
3838 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
3839 ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, MachinePointerInfo());
3840 }
3841
3842 InVals.push_back(ArgVal);
3843 }
3844
3845 // Area that is at least reserved in the caller of this function.
3846 unsigned MinReservedArea;
3847 if (HasParameterArea)
3848 MinReservedArea = std::max(ArgOffset, LinkageSize + 8 * PtrByteSize);
3849 else
3850 MinReservedArea = LinkageSize;
3851
3852 // Set the size that is at least reserved in caller of this function. Tail
3853 // call optimized functions' reserved stack space needs to be aligned so that
3854 // taking the difference between two stack areas will result in an aligned
3855 // stack.
3856 MinReservedArea =
3857 EnsureStackAlignment(Subtarget.getFrameLowering(), MinReservedArea);
3858 FuncInfo->setMinReservedArea(MinReservedArea);
3859
3860 // If the function takes variable number of arguments, make a frame index for
3861 // the start of the first vararg value... for expansion of llvm.va_start.
3862 if (isVarArg) {
3863 int Depth = ArgOffset;
3864
3865 FuncInfo->setVarArgsFrameIndex(
3866 MFI.CreateFixedObject(PtrByteSize, Depth, true));
3867 SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
3868
3869 // If this function is vararg, store any remaining integer argument regs
3870 // to their spots on the stack so that they may be loaded by dereferencing
3871 // the result of va_next.
3872 for (GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
3873 GPR_idx < Num_GPR_Regs; ++GPR_idx) {
3874 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
3875 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
3876 SDValue Store =
3877 DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
3878 MemOps.push_back(Store);
3879 // Increment the address by four for the next argument to store
3880 SDValue PtrOff = DAG.getConstant(PtrByteSize, dl, PtrVT);
3881 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
3882 }
3883 }
3884
3885 if (!MemOps.empty())
3886 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
3887
3888 return Chain;
3889}
3890
3891SDValue PPCTargetLowering::LowerFormalArguments_Darwin(
3892 SDValue Chain, CallingConv::ID CallConv, bool isVarArg,
3893 const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
3894 SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {
3895 // TODO: add description of PPC stack frame format, or at least some docs.
3896 //
3897 MachineFunction &MF = DAG.getMachineFunction();
3898 MachineFrameInfo &MFI = MF.getFrameInfo();
3899 PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>();
3900
3901 EVT PtrVT = getPointerTy(MF.getDataLayout());
3902 bool isPPC64 = PtrVT == MVT::i64;
3903 // Potential tail calls could cause overwriting of argument stack slots.
3904 bool isImmutable = !(getTargetMachine().Options.GuaranteedTailCallOpt &&
3905 (CallConv == CallingConv::Fast));
3906 unsigned PtrByteSize = isPPC64 ? 8 : 4;
3907 unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
3908 unsigned ArgOffset = LinkageSize;
3909 // Area that is at least reserved in caller of this function.
3910 unsigned MinReservedArea = ArgOffset;
3911
3912 static const MCPhysReg GPR_32[] = { // 32-bit registers.
3913 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
3914 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
3915 };
3916 static const MCPhysReg GPR_64[] = { // 64-bit registers.
3917 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
3918 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
3919 };
3920 static const MCPhysReg VR[] = {
3921 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
3922 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
3923 };
3924
3925 const unsigned Num_GPR_Regs = array_lengthof(GPR_32);
3926 const unsigned Num_FPR_Regs = useSoftFloat() ? 0 : 13;
3927 const unsigned Num_VR_Regs = array_lengthof( VR);
3928
3929 unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
3930
3931 const MCPhysReg *GPR = isPPC64 ? GPR_64 : GPR_32;
3932
3933 // In 32-bit non-varargs functions, the stack space for vectors is after the
3934 // stack space for non-vectors. We do not use this space unless we have
3935 // too many vectors to fit in registers, something that only occurs in
3936 // constructed examples:), but we have to walk the arglist to figure
3937 // that out...for the pathological case, compute VecArgOffset as the
3938 // start of the vector parameter area. Computing VecArgOffset is the
3939 // entire point of the following loop.
3940 unsigned VecArgOffset = ArgOffset;
3941 if (!isVarArg && !isPPC64) {
3942 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e;
3943 ++ArgNo) {
3944 EVT ObjectVT = Ins[ArgNo].VT;
3945 ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
3946
3947 if (Flags.isByVal()) {
3948 // ObjSize is the true size, ArgSize rounded up to multiple of regs.
3949 unsigned ObjSize = Flags.getByValSize();
3950 unsigned ArgSize =
3951 ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
3952 VecArgOffset += ArgSize;
3953 continue;
3954 }
3955
3956 switch(ObjectVT.getSimpleVT().SimpleTy) {
3957 default: llvm_unreachable("Unhandled argument type!")::llvm::llvm_unreachable_internal("Unhandled argument type!",
"/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 3957)
;
3958 case MVT::i1:
3959 case MVT::i32:
3960 case MVT::f32:
3961 VecArgOffset += 4;
3962 break;
3963 case MVT::i64: // PPC64
3964 case MVT::f64:
3965 // FIXME: We are guaranteed to be !isPPC64 at this point.
3966 // Does MVT::i64 apply?
3967 VecArgOffset += 8;
3968 break;
3969 case MVT::v4f32:
3970 case MVT::v4i32:
3971 case MVT::v8i16:
3972 case MVT::v16i8:
3973 // Nothing to do, we're only looking at Nonvector args here.
3974 break;
3975 }
3976 }
3977 }
3978 // We've found where the vector parameter area in memory is. Skip the
3979 // first 12 parameters; these don't use that memory.
3980 VecArgOffset = ((VecArgOffset+15)/16)*16;
3981 VecArgOffset += 12*16;
3982
3983 // Add DAG nodes to load the arguments or copy them out of registers. On
3984 // entry to a function on PPC, the arguments start after the linkage area,
3985 // although the first ones are often in registers.
3986
3987 SmallVector<SDValue, 8> MemOps;
3988 unsigned nAltivecParamsAtEnd = 0;
3989 Function::const_arg_iterator FuncArg = MF.getFunction().arg_begin();
3990 unsigned CurArgIdx = 0;
3991 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo) {
3992 SDValue ArgVal;
3993 bool needsLoad = false;
3994 EVT ObjectVT = Ins[ArgNo].VT;
3995 unsigned ObjSize = ObjectVT.getSizeInBits()/8;
3996 unsigned ArgSize = ObjSize;
3997 ISD::ArgFlagsTy Flags = Ins[ArgNo].Flags;
3998 if (Ins[ArgNo].isOrigArg()) {
3999 std::advance(FuncArg, Ins[ArgNo].getOrigArgIndex() - CurArgIdx);
4000 CurArgIdx = Ins[ArgNo].getOrigArgIndex();
4001 }
4002 unsigned CurArgOffset = ArgOffset;
4003
4004 // Varargs or 64 bit Altivec parameters are padded to a 16 byte boundary.
4005 if (ObjectVT==MVT::v4f32 || ObjectVT==MVT::v4i32 ||
4006 ObjectVT==MVT::v8i16 || ObjectVT==MVT::v16i8) {
4007 if (isVarArg || isPPC64) {
4008 MinReservedArea = ((MinReservedArea+15)/16)*16;
4009 MinReservedArea += CalculateStackSlotSize(ObjectVT,
4010 Flags,
4011 PtrByteSize);
4012 } else nAltivecParamsAtEnd++;
4013 } else
4014 // Calculate min reserved area.
4015 MinReservedArea += CalculateStackSlotSize(Ins[ArgNo].VT,
4016 Flags,
4017 PtrByteSize);
4018
4019 // FIXME the codegen can be much improved in some cases.
4020 // We do not have to keep everything in memory.
4021 if (Flags.isByVal()) {
4022 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 4022, __extension__ __PRETTY_FUNCTION__))
;
4023
4024 // ObjSize is the true size, ArgSize rounded up to multiple of registers.
4025 ObjSize = Flags.getByValSize();
4026 ArgSize = ((ObjSize + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
4027 // Objects of size 1 and 2 are right justified, everything else is
4028 // left justified. This means the memory address is adjusted forwards.
4029 if (ObjSize==1 || ObjSize==2) {
4030 CurArgOffset = CurArgOffset + (4 - ObjSize);
4031 }
4032 // The value of the object is its address.
4033 int FI = MFI.CreateFixedObject(ObjSize, CurArgOffset, false, true);
4034 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
4035 InVals.push_back(FIN);
4036 if (ObjSize==1 || ObjSize==2) {
4037 if (GPR_idx != Num_GPR_Regs) {
4038 unsigned VReg;
4039 if (isPPC64)
4040 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
4041 else
4042 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
4043 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
4044 EVT ObjType = ObjSize == 1 ? MVT::i8 : MVT::i16;
4045 SDValue Store =
4046 DAG.getTruncStore(Val.getValue(1), dl, Val, FIN,
4047 MachinePointerInfo(&*FuncArg), ObjType);
4048 MemOps.push_back(Store);
4049 ++GPR_idx;
4050 }
4051
4052 ArgOffset += PtrByteSize;
4053
4054 continue;
4055 }
4056 for (unsigned j = 0; j < ArgSize; j += PtrByteSize) {
4057 // Store whatever pieces of the object are in registers
4058 // to memory. ArgOffset will be the address of the beginning
4059 // of the object.
4060 if (GPR_idx != Num_GPR_Regs) {
4061 unsigned VReg;
4062 if (isPPC64)
4063 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
4064 else
4065 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
4066 int FI = MFI.CreateFixedObject(PtrByteSize, ArgOffset, true);
4067 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
4068 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
4069 SDValue Store = DAG.getStore(Val.getValue(1), dl, Val, FIN,
4070 MachinePointerInfo(&*FuncArg, j));
4071 MemOps.push_back(Store);
4072 ++GPR_idx;
4073 ArgOffset += PtrByteSize;
4074 } else {
4075 ArgOffset += ArgSize - (ArgOffset-CurArgOffset);
4076 break;
4077 }
4078 }
4079 continue;
4080 }
4081
4082 switch (ObjectVT.getSimpleVT().SimpleTy) {
4083 default: llvm_unreachable("Unhandled argument type!")::llvm::llvm_unreachable_internal("Unhandled argument type!",
"/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 4083)
;
4084 case MVT::i1:
4085 case MVT::i32:
4086 if (!isPPC64) {
4087 if (GPR_idx != Num_GPR_Regs) {
4088 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
4089 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
4090
4091 if (ObjectVT == MVT::i1)
4092 ArgVal = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, ArgVal);
4093
4094 ++GPR_idx;
4095 } else {
4096 needsLoad = true;
4097 ArgSize = PtrByteSize;
4098 }
4099 // All int arguments reserve stack space in the Darwin ABI.
4100 ArgOffset += PtrByteSize;
4101 break;
4102 }
4103 LLVM_FALLTHROUGH[[clang::fallthrough]];
4104 case MVT::i64: // PPC64
4105 if (GPR_idx != Num_GPR_Regs) {
4106 unsigned VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
4107 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i64);
4108
4109 if (ObjectVT == MVT::i32 || ObjectVT == MVT::i1)
4110 // PPC64 passes i8, i16, and i32 values in i64 registers. Promote
4111 // value to MVT::i64 and then truncate to the correct register size.
4112 ArgVal = extendArgForPPC64(Flags, ObjectVT, DAG, ArgVal, dl);
4113
4114 ++GPR_idx;
4115 } else {
4116 needsLoad = true;
4117 ArgSize = PtrByteSize;
4118 }
4119 // All int arguments reserve stack space in the Darwin ABI.
4120 ArgOffset += 8;
4121 break;
4122
4123 case MVT::f32:
4124 case MVT::f64:
4125 // Every 4 bytes of argument space consumes one of the GPRs available for
4126 // argument passing.
4127 if (GPR_idx != Num_GPR_Regs) {
4128 ++GPR_idx;
4129 if (ObjSize == 8 && GPR_idx != Num_GPR_Regs && !isPPC64)
4130 ++GPR_idx;
4131 }
4132 if (FPR_idx != Num_FPR_Regs) {
4133 unsigned VReg;
4134
4135 if (ObjectVT == MVT::f32)
4136 VReg = MF.addLiveIn(FPR[FPR_idx], &PPC::F4RCRegClass);
4137 else
4138 VReg = MF.addLiveIn(FPR[FPR_idx], &PPC::F8RCRegClass);
4139
4140 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
4141 ++FPR_idx;
4142 } else {
4143 needsLoad = true;
4144 }
4145
4146 // All FP arguments reserve stack space in the Darwin ABI.
4147 ArgOffset += isPPC64 ? 8 : ObjSize;
4148 break;
4149 case MVT::v4f32:
4150 case MVT::v4i32:
4151 case MVT::v8i16:
4152 case MVT::v16i8:
4153 // Note that vector arguments in registers don't reserve stack space,
4154 // except in varargs functions.
4155 if (VR_idx != Num_VR_Regs) {
4156 unsigned VReg = MF.addLiveIn(VR[VR_idx], &PPC::VRRCRegClass);
4157 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
4158 if (isVarArg) {
4159 while ((ArgOffset % 16) != 0) {
4160 ArgOffset += PtrByteSize;
4161 if (GPR_idx != Num_GPR_Regs)
4162 GPR_idx++;
4163 }
4164 ArgOffset += 16;
4165 GPR_idx = std::min(GPR_idx+4, Num_GPR_Regs); // FIXME correct for ppc64?
4166 }
4167 ++VR_idx;
4168 } else {
4169 if (!isVarArg && !isPPC64) {
4170 // Vectors go after all the nonvectors.
4171 CurArgOffset = VecArgOffset;
4172 VecArgOffset += 16;
4173 } else {
4174 // Vectors are aligned.
4175 ArgOffset = ((ArgOffset+15)/16)*16;
4176 CurArgOffset = ArgOffset;
4177 ArgOffset += 16;
4178 }
4179 needsLoad = true;
4180 }
4181 break;
4182 }
4183
4184 // We need to load the argument to a virtual register if we determined above
4185 // that we ran out of physical registers of the appropriate type.
4186 if (needsLoad) {
4187 int FI = MFI.CreateFixedObject(ObjSize,
4188 CurArgOffset + (ArgSize - ObjSize),
4189 isImmutable);
4190 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
4191 ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, MachinePointerInfo());
4192 }
4193
4194 InVals.push_back(ArgVal);
4195 }
4196
4197 // Allow for Altivec parameters at the end, if needed.
4198 if (nAltivecParamsAtEnd) {
4199 MinReservedArea = ((MinReservedArea+15)/16)*16;
4200 MinReservedArea += 16*nAltivecParamsAtEnd;
4201 }
4202
4203 // Area that is at least reserved in the caller of this function.
4204 MinReservedArea = std::max(MinReservedArea, LinkageSize + 8 * PtrByteSize);
4205
4206 // Set the size that is at least reserved in caller of this function. Tail
4207 // call optimized functions' reserved stack space needs to be aligned so that
4208 // taking the difference between two stack areas will result in an aligned
4209 // stack.
4210 MinReservedArea =
4211 EnsureStackAlignment(Subtarget.getFrameLowering(), MinReservedArea);
4212 FuncInfo->setMinReservedArea(MinReservedArea);
4213
4214 // If the function takes variable number of arguments, make a frame index for
4215 // the start of the first vararg value... for expansion of llvm.va_start.
4216 if (isVarArg) {
4217 int Depth = ArgOffset;
4218
4219 FuncInfo->setVarArgsFrameIndex(
4220 MFI.CreateFixedObject(PtrVT.getSizeInBits()/8,
4221 Depth, true));
4222 SDValue FIN = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
4223
4224 // If this function is vararg, store any remaining integer argument regs
4225 // to their spots on the stack so that they may be loaded by dereferencing
4226 // the result of va_next.
4227 for (; GPR_idx != Num_GPR_Regs; ++GPR_idx) {
4228 unsigned VReg;
4229
4230 if (isPPC64)
4231 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::G8RCRegClass);
4232 else
4233 VReg = MF.addLiveIn(GPR[GPR_idx], &PPC::GPRCRegClass);
4234
4235 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, PtrVT);
4236 SDValue Store =
4237 DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
4238 MemOps.push_back(Store);
4239 // Increment the address by four for the next argument to store
4240 SDValue PtrOff = DAG.getConstant(PtrVT.getSizeInBits()/8, dl, PtrVT);
4241 FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
4242 }
4243 }
4244
4245 if (!MemOps.empty())
4246 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOps);
4247
4248 return Chain;
4249}
4250
4251/// CalculateTailCallSPDiff - Get the amount the stack pointer has to be
4252/// adjusted to accommodate the arguments for the tailcall.
4253static int CalculateTailCallSPDiff(SelectionDAG& DAG, bool isTailCall,
4254 unsigned ParamSize) {
4255
4256 if (!isTailCall) return 0;
4257
4258 PPCFunctionInfo *FI = DAG.getMachineFunction().getInfo<PPCFunctionInfo>();
4259 unsigned CallerMinReservedArea = FI->getMinReservedArea();
4260 int SPDiff = (int)CallerMinReservedArea - (int)ParamSize;
4261 // Remember only if the new adjustement is bigger.
4262 if (SPDiff < FI->getTailCallSPDelta())
4263 FI->setTailCallSPDelta(SPDiff);
4264
4265 return SPDiff;
4266}
4267
4268static bool isFunctionGlobalAddress(SDValue Callee);
4269
4270static bool
4271callsShareTOCBase(const Function *Caller, SDValue Callee,
4272 const TargetMachine &TM) {
4273 // If !G, Callee can be an external symbol.
4274 GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee);
4275 if (!G)
4276 return false;
4277
4278 // The medium and large code models are expected to provide a sufficiently
4279 // large TOC to provide all data addressing needs of a module with a
4280 // single TOC. Since each module will be addressed with a single TOC then we
4281 // only need to check that caller and callee don't cross dso boundaries.
4282 if (CodeModel::Medium == TM.getCodeModel() ||
4283 CodeModel::Large == TM.getCodeModel())
4284 return TM.shouldAssumeDSOLocal(*Caller->getParent(), G->getGlobal());
4285
4286 // Otherwise we need to ensure callee and caller are in the same section,
4287 // since the linker may allocate multiple TOCs, and we don't know which
4288 // sections will belong to the same TOC base.
4289
4290 const GlobalValue *GV = G->getGlobal();
4291 if (!GV->isStrongDefinitionForLinker())
4292 return false;
4293
4294 // Any explicitly-specified sections and section prefixes must also match.
4295 // Also, if we're using -ffunction-sections, then each function is always in
4296 // a different section (the same is true for COMDAT functions).
4297 if (TM.getFunctionSections() || GV->hasComdat() || Caller->hasComdat() ||
4298 GV->getSection() != Caller->getSection())
4299 return false;
4300 if (const auto *F = dyn_cast<Function>(GV)) {
4301 if (F->getSectionPrefix() != Caller->getSectionPrefix())
4302 return false;
4303 }
4304
4305 // If the callee might be interposed, then we can't assume the ultimate call
4306 // target will be in the same section. Even in cases where we can assume that
4307 // interposition won't happen, in any case where the linker might insert a
4308 // stub to allow for interposition, we must generate code as though
4309 // interposition might occur. To understand why this matters, consider a
4310 // situation where: a -> b -> c where the arrows indicate calls. b and c are
4311 // in the same section, but a is in a different module (i.e. has a different
4312 // TOC base pointer). If the linker allows for interposition between b and c,
4313 // then it will generate a stub for the call edge between b and c which will
4314 // save the TOC pointer into the designated stack slot allocated by b. If we
4315 // return true here, and therefore allow a tail call between b and c, that
4316 // stack slot won't exist and the b -> c stub will end up saving b'c TOC base
4317 // pointer into the stack slot allocated by a (where the a -> b stub saved
4318 // a's TOC base pointer). If we're not considering a tail call, but rather,
4319 // whether a nop is needed after the call instruction in b, because the linker
4320 // will insert a stub, it might complain about a missing nop if we omit it
4321 // (although many don't complain in this case).
4322 if (!TM.shouldAssumeDSOLocal(*Caller->getParent(), GV))
4323 return false;
4324
4325 return true;
4326}
4327
4328static bool
4329needStackSlotPassParameters(const PPCSubtarget &Subtarget,
4330 const SmallVectorImpl<ISD::OutputArg> &Outs) {
4331 assert(Subtarget.isSVR4ABI() && Subtarget.isPPC64())(static_cast <bool> (Subtarget.isSVR4ABI() && Subtarget
.isPPC64()) ? void (0) : __assert_fail ("Subtarget.isSVR4ABI() && Subtarget.isPPC64()"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 4331, __extension__ __PRETTY_FUNCTION__))
;
4332
4333 const unsigned PtrByteSize = 8;
4334 const unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
4335
4336 static const MCPhysReg GPR[] = {
4337 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
4338 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
4339 };
4340 static const MCPhysReg VR[] = {
4341 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
4342 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
4343 };
4344
4345 const unsigned NumGPRs = array_lengthof(GPR);
4346 const unsigned NumFPRs = 13;
4347 const unsigned NumVRs = array_lengthof(VR);
4348 const unsigned ParamAreaSize = NumGPRs * PtrByteSize;
4349
4350 unsigned NumBytes = LinkageSize;
4351 unsigned AvailableFPRs = NumFPRs;
4352 unsigned AvailableVRs = NumVRs;
4353
4354 for (const ISD::OutputArg& Param : Outs) {
4355 if (Param.Flags.isNest()) continue;
4356
4357 if (CalculateStackSlotUsed(Param.VT, Param.ArgVT, Param.Flags,
4358 PtrByteSize, LinkageSize, ParamAreaSize,
4359 NumBytes, AvailableFPRs, AvailableVRs,
4360 Subtarget.hasQPX()))
4361 return true;
4362 }
4363 return false;
4364}
4365
4366static bool
4367hasSameArgumentList(const Function *CallerFn, ImmutableCallSite CS) {
4368 if (CS.arg_size() != CallerFn->arg_size())
4369 return false;
4370
4371 ImmutableCallSite::arg_iterator CalleeArgIter = CS.arg_begin();
4372 ImmutableCallSite::arg_iterator CalleeArgEnd = CS.arg_end();
4373 Function::const_arg_iterator CallerArgIter = CallerFn->arg_begin();
4374
4375 for (; CalleeArgIter != CalleeArgEnd; ++CalleeArgIter, ++CallerArgIter) {
4376 const Value* CalleeArg = *CalleeArgIter;
4377 const Value* CallerArg = &(*CallerArgIter);
4378 if (CalleeArg == CallerArg)
4379 continue;
4380
4381 // e.g. @caller([4 x i64] %a, [4 x i64] %b) {
4382 // tail call @callee([4 x i64] undef, [4 x i64] %b)
4383 // }
4384 // 1st argument of callee is undef and has the same type as caller.
4385 if (CalleeArg->getType() == CallerArg->getType() &&
4386 isa<UndefValue>(CalleeArg))
4387 continue;
4388
4389 return false;
4390 }
4391
4392 return true;
4393}
4394
4395// Returns true if TCO is possible between the callers and callees
4396// calling conventions.
4397static bool
4398areCallingConvEligibleForTCO_64SVR4(CallingConv::ID CallerCC,
4399 CallingConv::ID CalleeCC) {
4400 // Tail calls are possible with fastcc and ccc.
4401 auto isTailCallableCC = [] (CallingConv::ID CC){
4402 return CC == CallingConv::C || CC == CallingConv::Fast;
4403 };
4404 if (!isTailCallableCC(CallerCC) || !isTailCallableCC(CalleeCC))
4405 return false;
4406
4407 // We can safely tail call both fastcc and ccc callees from a c calling
4408 // convention caller. If the caller is fastcc, we may have less stack space
4409 // than a non-fastcc caller with the same signature so disable tail-calls in
4410 // that case.
4411 return CallerCC == CallingConv::C || CallerCC == CalleeCC;
4412}
4413
4414bool
4415PPCTargetLowering::IsEligibleForTailCallOptimization_64SVR4(
4416 SDValue Callee,
4417 CallingConv::ID CalleeCC,
4418 ImmutableCallSite CS,
4419 bool isVarArg,
4420 const SmallVectorImpl<ISD::OutputArg> &Outs,
4421 const SmallVectorImpl<ISD::InputArg> &Ins,
4422 SelectionDAG& DAG) const {
4423 bool TailCallOpt = getTargetMachine().Options.GuaranteedTailCallOpt;
4424
4425 if (DisableSCO && !TailCallOpt) return false;
4426
4427 // Variadic argument functions are not supported.
4428 if (isVarArg) return false;
4429
4430 auto &Caller = DAG.getMachineFunction().getFunction();
4431 // Check that the calling conventions are compatible for tco.
4432 if (!areCallingConvEligibleForTCO_64SVR4(Caller.getCallingConv(), CalleeCC))
4433 return false;
4434
4435 // Caller contains any byval parameter is not supported.
4436 if (any_of(Ins, [](const ISD::InputArg &IA) { return IA.Flags.isByVal(); }))
4437 return false;
4438
4439 // Callee contains any byval parameter is not supported, too.
4440 // Note: This is a quick work around, because in some cases, e.g.
4441 // caller's stack size > callee's stack size, we are still able to apply
4442 // sibling call optimization. For example, gcc is able to do SCO for caller1
4443 // in the following example, but not for caller2.
4444 // struct test {
4445 // long int a;
4446 // char ary[56];
4447 // } gTest;
4448 // __attribute__((noinline)) int callee(struct test v, struct test *b) {
4449 // b->a = v.a;
4450 // return 0;
4451 // }
4452 // void caller1(struct test a, struct test c, struct test *b) {
4453 // callee(gTest, b); }
4454 // void caller2(struct test *b) { callee(gTest, b); }
4455 if (any_of(Outs, [](const ISD::OutputArg& OA) { return OA.Flags.isByVal(); }))
4456 return false;
4457
4458 // If callee and caller use different calling conventions, we cannot pass
4459 // parameters on stack since offsets for the parameter area may be different.
4460 if (Caller.getCallingConv() != CalleeCC &&
4461 needStackSlotPassParameters(Subtarget, Outs))
4462 return false;
4463
4464 // No TCO/SCO on indirect call because Caller have to restore its TOC
4465 if (!isFunctionGlobalAddress(Callee) &&
4466 !isa<ExternalSymbolSDNode>(Callee))
4467 return false;
4468
4469 // If the caller and callee potentially have different TOC bases then we
4470 // cannot tail call since we need to restore the TOC pointer after the call.
4471 // ref: https://bugzilla.mozilla.org/show_bug.cgi?id=973977
4472 if (!callsShareTOCBase(&Caller, Callee, getTargetMachine()))
4473 return false;
4474
4475 // TCO allows altering callee ABI, so we don't have to check further.
4476 if (CalleeCC == CallingConv::Fast && TailCallOpt)
4477 return true;
4478
4479 if (DisableSCO) return false;
4480
4481 // If callee use the same argument list that caller is using, then we can
4482 // apply SCO on this case. If it is not, then we need to check if callee needs
4483 // stack for passing arguments.
4484 if (!hasSameArgumentList(&Caller, CS) &&
4485 needStackSlotPassParameters(Subtarget, Outs)) {
4486 return false;
4487 }
4488
4489 return true;
4490}
4491
4492/// IsEligibleForTailCallOptimization - Check whether the call is eligible
4493/// for tail call optimization. Targets which want to do tail call
4494/// optimization should implement this function.
4495bool
4496PPCTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
4497 CallingConv::ID CalleeCC,
4498 bool isVarArg,
4499 const SmallVectorImpl<ISD::InputArg> &Ins,
4500 SelectionDAG& DAG) const {
4501 if (!getTargetMachine().Options.GuaranteedTailCallOpt)
4502 return false;
4503
4504 // Variable argument functions are not supported.
4505 if (isVarArg)
4506 return false;
4507
4508 MachineFunction &MF = DAG.getMachineFunction();
4509 CallingConv::ID CallerCC = MF.getFunction().getCallingConv();
4510 if (CalleeCC == CallingConv::Fast && CallerCC == CalleeCC) {
4511 // Functions containing by val parameters are not supported.
4512 for (unsigned i = 0; i != Ins.size(); i++) {
4513 ISD::ArgFlagsTy Flags = Ins[i].Flags;
4514 if (Flags.isByVal()) return false;
4515 }
4516
4517 // Non-PIC/GOT tail calls are supported.
4518 if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
4519 return true;
4520
4521 // At the moment we can only do local tail calls (in same module, hidden
4522 // or protected) if we are generating PIC.
4523 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
4524 return G->getGlobal()->hasHiddenVisibility()
4525 || G->getGlobal()->hasProtectedVisibility();
4526 }
4527
4528 return false;
4529}
4530
4531/// isCallCompatibleAddress - Return the immediate to use if the specified
4532/// 32-bit value is representable in the immediate field of a BxA instruction.
4533static SDNode *isBLACompatibleAddress(SDValue Op, SelectionDAG &DAG) {
4534 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
4535 if (!C) return nullptr;
4536
4537 int Addr = C->getZExtValue();
4538 if ((Addr & 3) != 0 || // Low 2 bits are implicitly zero.
4539 SignExtend32<26>(Addr) != Addr)
4540 return nullptr; // Top 6 bits have to be sext of immediate.
4541
4542 return DAG
4543 .getConstant(
4544 (int)C->getZExtValue() >> 2, SDLoc(Op),
4545 DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout()))
4546 .getNode();
4547}
4548
4549namespace {
4550
4551struct TailCallArgumentInfo {
4552 SDValue Arg;
4553 SDValue FrameIdxOp;
4554 int FrameIdx = 0;
4555
4556 TailCallArgumentInfo() = default;
4557};
4558
4559} // end anonymous namespace
4560
4561/// StoreTailCallArgumentsToStackSlot - Stores arguments to their stack slot.
4562static void StoreTailCallArgumentsToStackSlot(
4563 SelectionDAG &DAG, SDValue Chain,
4564 const SmallVectorImpl<TailCallArgumentInfo> &TailCallArgs,
4565 SmallVectorImpl<SDValue> &MemOpChains, const SDLoc &dl) {
4566 for (unsigned i = 0, e = TailCallArgs.size(); i != e; ++i) {
4567 SDValue Arg = TailCallArgs[i].Arg;
4568 SDValue FIN = TailCallArgs[i].FrameIdxOp;
4569 int FI = TailCallArgs[i].FrameIdx;
4570 // Store relative to framepointer.
4571 MemOpChains.push_back(DAG.getStore(
4572 Chain, dl, Arg, FIN,
4573 MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI)));
4574 }
4575}
4576
4577/// EmitTailCallStoreFPAndRetAddr - Move the frame pointer and return address to
4578/// the appropriate stack slot for the tail call optimized function call.
4579static SDValue EmitTailCallStoreFPAndRetAddr(SelectionDAG &DAG, SDValue Chain,
4580 SDValue OldRetAddr, SDValue OldFP,
4581 int SPDiff, const SDLoc &dl) {
4582 if (SPDiff) {
4583 // Calculate the new stack slot for the return address.
4584 MachineFunction &MF = DAG.getMachineFunction();
4585 const PPCSubtarget &Subtarget = MF.getSubtarget<PPCSubtarget>();
4586 const PPCFrameLowering *FL = Subtarget.getFrameLowering();
4587 bool isPPC64 = Subtarget.isPPC64();
4588 int SlotSize = isPPC64 ? 8 : 4;
4589 int NewRetAddrLoc = SPDiff + FL->getReturnSaveOffset();
4590 int NewRetAddr = MF.getFrameInfo().CreateFixedObject(SlotSize,
4591 NewRetAddrLoc, true);
4592 EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
4593 SDValue NewRetAddrFrIdx = DAG.getFrameIndex(NewRetAddr, VT);
4594 Chain = DAG.getStore(Chain, dl, OldRetAddr, NewRetAddrFrIdx,
4595 MachinePointerInfo::getFixedStack(MF, NewRetAddr));
4596
4597 // When using the 32/64-bit SVR4 ABI there is no need to move the FP stack
4598 // slot as the FP is never overwritten.
4599 if (Subtarget.isDarwinABI()) {
4600 int NewFPLoc = SPDiff + FL->getFramePointerSaveOffset();
4601 int NewFPIdx = MF.getFrameInfo().CreateFixedObject(SlotSize, NewFPLoc,
4602 true);
4603 SDValue NewFramePtrIdx = DAG.getFrameIndex(NewFPIdx, VT);
4604 Chain = DAG.getStore(Chain, dl, OldFP, NewFramePtrIdx,
4605 MachinePointerInfo::getFixedStack(
4606 DAG.getMachineFunction(), NewFPIdx));
4607 }
4608 }
4609 return Chain;
4610}
4611
4612/// CalculateTailCallArgDest - Remember Argument for later processing. Calculate
4613/// the position of the argument.
4614static void
4615CalculateTailCallArgDest(SelectionDAG &DAG, MachineFunction &MF, bool isPPC64,
4616 SDValue Arg, int SPDiff, unsigned ArgOffset,
4617 SmallVectorImpl<TailCallArgumentInfo>& TailCallArguments) {
4618 int Offset = ArgOffset + SPDiff;
4619 uint32_t OpSize = (Arg.getValueSizeInBits() + 7) / 8;
4620 int FI = MF.getFrameInfo().CreateFixedObject(OpSize, Offset, true);
4621 EVT VT = isPPC64 ? MVT::i64 : MVT::i32;
4622 SDValue FIN = DAG.getFrameIndex(FI, VT);
4623 TailCallArgumentInfo Info;
4624 Info.Arg = Arg;
4625 Info.FrameIdxOp = FIN;
4626 Info.FrameIdx = FI;
4627 TailCallArguments.push_back(Info);
4628}
4629
4630/// EmitTCFPAndRetAddrLoad - Emit load from frame pointer and return address
4631/// stack slot. Returns the chain as result and the loaded frame pointers in
4632/// LROpOut/FPOpout. Used when tail calling.
4633SDValue PPCTargetLowering::EmitTailCallLoadFPAndRetAddr(
4634 SelectionDAG &DAG, int SPDiff, SDValue Chain, SDValue &LROpOut,
4635 SDValue &FPOpOut, const SDLoc &dl) const {
4636 if (SPDiff) {
4637 // Load the LR and FP stack slot for later adjusting.
4638 EVT VT = Subtarget.isPPC64() ? MVT::i64 : MVT::i32;
4639 LROpOut = getReturnAddrFrameIndex(DAG);
4640 LROpOut = DAG.getLoad(VT, dl, Chain, LROpOut, MachinePointerInfo());
4641 Chain = SDValue(LROpOut.getNode(), 1);
4642
4643 // When using the 32/64-bit SVR4 ABI there is no need to load the FP stack
4644 // slot as the FP is never overwritten.
4645 if (Subtarget.isDarwinABI()) {
4646 FPOpOut = getFramePointerFrameIndex(DAG);
4647 FPOpOut = DAG.getLoad(VT, dl, Chain, FPOpOut, MachinePointerInfo());
4648 Chain = SDValue(FPOpOut.getNode(), 1);
4649 }
4650 }
4651 return Chain;
4652}
4653
4654/// CreateCopyOfByValArgument - Make a copy of an aggregate at address specified
4655/// by "Src" to address "Dst" of size "Size". Alignment information is
4656/// specified by the specific parameter attribute. The copy will be passed as
4657/// a byval function parameter.
4658/// Sometimes what we are copying is the end of a larger object, the part that
4659/// does not fit in registers.
4660static SDValue CreateCopyOfByValArgument(SDValue Src, SDValue Dst,
4661 SDValue Chain, ISD::ArgFlagsTy Flags,
4662 SelectionDAG &DAG, const SDLoc &dl) {
4663 SDValue SizeNode = DAG.getConstant(Flags.getByValSize(), dl, MVT::i32);
4664 return DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode, Flags.getByValAlign(),
4665 false, false, false, MachinePointerInfo(),
4666 MachinePointerInfo());
4667}
4668
4669/// LowerMemOpCallTo - Store the argument to the stack or remember it in case of
4670/// tail calls.
4671static void LowerMemOpCallTo(
4672 SelectionDAG &DAG, MachineFunction &MF, SDValue Chain, SDValue Arg,
4673 SDValue PtrOff, int SPDiff, unsigned ArgOffset, bool isPPC64,
4674 bool isTailCall, bool isVector, SmallVectorImpl<SDValue> &MemOpChains,
4675 SmallVectorImpl<TailCallArgumentInfo> &TailCallArguments, const SDLoc &dl) {
4676 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout());
4677 if (!isTailCall) {
4678 if (isVector) {
4679 SDValue StackPtr;
4680 if (isPPC64)
4681 StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
4682 else
4683 StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
4684 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr,
4685 DAG.getConstant(ArgOffset, dl, PtrVT));
4686 }
4687 MemOpChains.push_back(
4688 DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo()));
4689 // Calculate and remember argument location.
4690 } else CalculateTailCallArgDest(DAG, MF, isPPC64, Arg, SPDiff, ArgOffset,
4691 TailCallArguments);
4692}
4693
4694static void
4695PrepareTailCall(SelectionDAG &DAG, SDValue &InFlag, SDValue &Chain,
4696 const SDLoc &dl, int SPDiff, unsigned NumBytes, SDValue LROp,
4697 SDValue FPOp,
4698 SmallVectorImpl<TailCallArgumentInfo> &TailCallArguments) {
4699 // Emit a sequence of copyto/copyfrom virtual registers for arguments that
4700 // might overwrite each other in case of tail call optimization.
4701 SmallVector<SDValue, 8> MemOpChains2;
4702 // Do not flag preceding copytoreg stuff together with the following stuff.
4703 InFlag = SDValue();
4704 StoreTailCallArgumentsToStackSlot(DAG, Chain, TailCallArguments,
4705 MemOpChains2, dl);
4706 if (!MemOpChains2.empty())
4707 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains2);
4708
4709 // Store the return address to the appropriate stack slot.
4710 Chain = EmitTailCallStoreFPAndRetAddr(DAG, Chain, LROp, FPOp, SPDiff, dl);
4711
4712 // Emit callseq_end just before tailcall node.
4713 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, dl, true),
4714 DAG.getIntPtrConstant(0, dl, true), InFlag, dl);
4715 InFlag = Chain.getValue(1);
4716}
4717
4718// Is this global address that of a function that can be called by name? (as
4719// opposed to something that must hold a descriptor for an indirect call).
4720static bool isFunctionGlobalAddress(SDValue Callee) {
4721 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
4722 if (Callee.getOpcode() == ISD::GlobalTLSAddress ||
4723 Callee.getOpcode() == ISD::TargetGlobalTLSAddress)
4724 return false;
4725
4726 return G->getGlobal()->getValueType()->isFunctionTy();
4727 }
4728
4729 return false;
4730}
4731
4732static unsigned
4733PrepareCall(SelectionDAG &DAG, SDValue &Callee, SDValue &InFlag, SDValue &Chain,
4734 SDValue CallSeqStart, const SDLoc &dl, int SPDiff, bool isTailCall,
4735 bool isPatchPoint, bool hasNest,
4736 SmallVectorImpl<std::pair<unsigned, SDValue>> &RegsToPass,
4737 SmallVectorImpl<SDValue> &Ops, std::vector<EVT> &NodeTys,
4738 ImmutableCallSite CS, const PPCSubtarget &Subtarget) {
4739 bool isPPC64 = Subtarget.isPPC64();
4740 bool isSVR4ABI = Subtarget.isSVR4ABI();
4741 bool isELFv2ABI = Subtarget.isELFv2ABI();
4742
4743 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy(DAG.getDataLayout());
4744 NodeTys.push_back(MVT::Other); // Returns a chain
4745 NodeTys.push_back(MVT::Glue); // Returns a flag for retval copy to use.
4746
4747 unsigned CallOpc = PPCISD::CALL;
4748
4749 bool needIndirectCall = true;
4750 if (!isSVR4ABI || !isPPC64)
4751 if (SDNode *Dest = isBLACompatibleAddress(Callee, DAG)) {
4752 // If this is an absolute destination address, use the munged value.
4753 Callee = SDValue(Dest, 0);
4754 needIndirectCall = false;
4755 }
4756
4757 // PC-relative references to external symbols should go through $stub, unless
4758 // we're building with the leopard linker or later, which automatically
4759 // synthesizes these stubs.
4760 const TargetMachine &TM = DAG.getTarget();
4761 const Module *Mod = DAG.getMachineFunction().getFunction().getParent();
4762 const GlobalValue *GV = nullptr;
4763 if (auto *G = dyn_cast<GlobalAddressSDNode>(Callee))
4764 GV = G->getGlobal();
4765 bool Local = TM.shouldAssumeDSOLocal(*Mod, GV);
4766 bool UsePlt = !Local && Subtarget.isTargetELF() && !isPPC64;
4767
4768 if (isFunctionGlobalAddress(Callee)) {
4769 GlobalAddressSDNode *G = cast<GlobalAddressSDNode>(Callee);
4770 // A call to a TLS address is actually an indirect call to a
4771 // thread-specific pointer.
4772 unsigned OpFlags = 0;
4773 if (UsePlt)
4774 OpFlags = PPCII::MO_PLT;
4775
4776 // If the callee is a GlobalAddress/ExternalSymbol node (quite common,
4777 // every direct call is) turn it into a TargetGlobalAddress /
4778 // TargetExternalSymbol node so that legalize doesn't hack it.
4779 Callee = DAG.getTargetGlobalAddress(G->getGlobal(), dl,
4780 Callee.getValueType(), 0, OpFlags);
4781 needIndirectCall = false;
4782 }
4783
4784 if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
4785 unsigned char OpFlags = 0;
4786
4787 if (UsePlt)
4788 OpFlags = PPCII::MO_PLT;
4789
4790 Callee = DAG.getTargetExternalSymbol(S->getSymbol(), Callee.getValueType(),
4791 OpFlags);
4792 needIndirectCall = false;
4793 }
4794
4795 if (isPatchPoint) {
4796 // We'll form an invalid direct call when lowering a patchpoint; the full
4797 // sequence for an indirect call is complicated, and many of the
4798 // instructions introduced might have side effects (and, thus, can't be
4799 // removed later). The call itself will be removed as soon as the
4800 // argument/return lowering is complete, so the fact that it has the wrong
4801 // kind of operands should not really matter.
4802 needIndirectCall = false;
4803 }
4804
4805 if (needIndirectCall) {
4806 // Otherwise, this is an indirect call. We have to use a MTCTR/BCTRL pair
4807 // to do the call, we can't use PPCISD::CALL.
4808 SDValue MTCTROps[] = {Chain, Callee, InFlag};
4809
4810 if (isSVR4ABI && isPPC64 && !isELFv2ABI) {
4811 // Function pointers in the 64-bit SVR4 ABI do not point to the function
4812 // entry point, but to the function descriptor (the function entry point
4813 // address is part of the function descriptor though).
4814 // The function descriptor is a three doubleword structure with the
4815 // following fields: function entry point, TOC base address and
4816 // environment pointer.
4817 // Thus for a call through a function pointer, the following actions need
4818 // to be performed:
4819 // 1. Save the TOC of the caller in the TOC save area of its stack
4820 // frame (this is done in LowerCall_Darwin() or LowerCall_64SVR4()).
4821 // 2. Load the address of the function entry point from the function
4822 // descriptor.
4823 // 3. Load the TOC of the callee from the function descriptor into r2.
4824 // 4. Load the environment pointer from the function descriptor into
4825 // r11.
4826 // 5. Branch to the function entry point address.
4827 // 6. On return of the callee, the TOC of the caller needs to be
4828 // restored (this is done in FinishCall()).
4829 //
4830 // The loads are scheduled at the beginning of the call sequence, and the
4831 // register copies are flagged together to ensure that no other
4832 // operations can be scheduled in between. E.g. without flagging the
4833 // copies together, a TOC access in the caller could be scheduled between
4834 // the assignment of the callee TOC and the branch to the callee, which
4835 // results in the TOC access going through the TOC of the callee instead
4836 // of going through the TOC of the caller, which leads to incorrect code.
4837
4838 // Load the address of the function entry point from the function
4839 // descriptor.
4840 SDValue LDChain = CallSeqStart.getValue(CallSeqStart->getNumValues()-1);
4841 if (LDChain.getValueType() == MVT::Glue)
4842 LDChain = CallSeqStart.getValue(CallSeqStart->getNumValues()-2);
4843
4844 auto MMOFlags = Subtarget.hasInvariantFunctionDescriptors()
4845 ? (MachineMemOperand::MODereferenceable |
4846 MachineMemOperand::MOInvariant)
4847 : MachineMemOperand::MONone;
4848
4849 MachinePointerInfo MPI(CS ? CS.getCalledValue() : nullptr);
4850 SDValue LoadFuncPtr = DAG.getLoad(MVT::i64, dl, LDChain, Callee, MPI,
4851 /* Alignment = */ 8, MMOFlags);
4852
4853 // Load environment pointer into r11.
4854 SDValue PtrOff = DAG.getIntPtrConstant(16, dl);
4855 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, MVT::i64, Callee, PtrOff);
4856 SDValue LoadEnvPtr =
4857 DAG.getLoad(MVT::i64, dl, LDChain, AddPtr, MPI.getWithOffset(16),
4858 /* Alignment = */ 8, MMOFlags);
4859
4860 SDValue TOCOff = DAG.getIntPtrConstant(8, dl);
4861 SDValue AddTOC = DAG.getNode(ISD::ADD, dl, MVT::i64, Callee, TOCOff);
4862 SDValue TOCPtr =
4863 DAG.getLoad(MVT::i64, dl, LDChain, AddTOC, MPI.getWithOffset(8),
4864 /* Alignment = */ 8, MMOFlags);
4865
4866 setUsesTOCBasePtr(DAG);
4867 SDValue TOCVal = DAG.getCopyToReg(Chain, dl, PPC::X2, TOCPtr,
4868 InFlag);
4869 Chain = TOCVal.getValue(0);
4870 InFlag = TOCVal.getValue(1);
4871
4872 // If the function call has an explicit 'nest' parameter, it takes the
4873 // place of the environment pointer.
4874 if (!hasNest) {
4875 SDValue EnvVal = DAG.getCopyToReg(Chain, dl, PPC::X11, LoadEnvPtr,
4876 InFlag);
4877
4878 Chain = EnvVal.getValue(0);
4879 InFlag = EnvVal.getValue(1);
4880 }
4881
4882 MTCTROps[0] = Chain;
4883 MTCTROps[1] = LoadFuncPtr;
4884 MTCTROps[2] = InFlag;
4885 }
4886
4887 Chain = DAG.getNode(PPCISD::MTCTR, dl, NodeTys,
4888 makeArrayRef(MTCTROps, InFlag.getNode() ? 3 : 2));
4889 InFlag = Chain.getValue(1);
4890
4891 NodeTys.clear();
4892 NodeTys.push_back(MVT::Other);
4893 NodeTys.push_back(MVT::Glue);
4894 Ops.push_back(Chain);
4895 CallOpc = PPCISD::BCTRL;
4896 Callee.setNode(nullptr);
4897 // Add use of X11 (holding environment pointer)
4898 if (isSVR4ABI && isPPC64 && !isELFv2ABI && !hasNest)
4899 Ops.push_back(DAG.getRegister(PPC::X11, PtrVT));
4900 // Add CTR register as callee so a bctr can be emitted later.
4901 if (isTailCall)
4902 Ops.push_back(DAG.getRegister(isPPC64 ? PPC::CTR8 : PPC::CTR, PtrVT));
4903 }
4904
4905 // If this is a direct call, pass the chain and the callee.
4906 if (Callee.getNode()) {
4907 Ops.push_back(Chain);
4908 Ops.push_back(Callee);
4909 }
4910 // If this is a tail call add stack pointer delta.
4911 if (isTailCall)
4912 Ops.push_back(DAG.getConstant(SPDiff, dl, MVT::i32));
4913
4914 // Add argument registers to the end of the list so that they are known live
4915 // into the call.
4916 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
4917 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
4918 RegsToPass[i].second.getValueType()));
4919
4920 // All calls, in both the ELF V1 and V2 ABIs, need the TOC register live
4921 // into the call.
4922 if (isSVR4ABI && isPPC64 && !isPatchPoint) {
4923 setUsesTOCBasePtr(DAG);
4924 Ops.push_back(DAG.getRegister(PPC::X2, PtrVT));
4925 }
4926
4927 return CallOpc;
4928}
4929
4930SDValue PPCTargetLowering::LowerCallResult(
4931 SDValue Chain, SDValue InFlag, CallingConv::ID CallConv, bool isVarArg,
4932 const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
4933 SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals) const {
4934 SmallVector<CCValAssign, 16> RVLocs;
4935 CCState CCRetInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
4936 *DAG.getContext());
4937 CCRetInfo.AnalyzeCallResult(Ins, RetCC_PPC);
4938
4939 // Copy all of the result registers out of their specified physreg.
4940 for (unsigned i = 0, e = RVLocs.size(); i != e; ++i) {
4941 CCValAssign &VA = RVLocs[i];
4942 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 4942, __extension__ __PRETTY_FUNCTION__))
;
4943
4944 SDValue Val = DAG.getCopyFromReg(Chain, dl,
4945 VA.getLocReg(), VA.getLocVT(), InFlag);
4946 Chain = Val.getValue(1);
4947 InFlag = Val.getValue(2);
4948
4949 switch (VA.getLocInfo()) {
4950 default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 4950)
;
4951 case CCValAssign::Full: break;
4952 case CCValAssign::AExt:
4953 Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
4954 break;
4955 case CCValAssign::ZExt:
4956 Val = DAG.getNode(ISD::AssertZext, dl, VA.getLocVT(), Val,
4957 DAG.getValueType(VA.getValVT()));
4958 Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
4959 break;
4960 case CCValAssign::SExt:
4961 Val = DAG.getNode(ISD::AssertSext, dl, VA.getLocVT(), Val,
4962 DAG.getValueType(VA.getValVT()));
4963 Val = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), Val);
4964 break;
4965 }
4966
4967 InVals.push_back(Val);
4968 }
4969
4970 return Chain;
4971}
4972
4973SDValue PPCTargetLowering::FinishCall(
4974 CallingConv::ID CallConv, const SDLoc &dl, bool isTailCall, bool isVarArg,
4975 bool isPatchPoint, bool hasNest, SelectionDAG &DAG,
4976 SmallVector<std::pair<unsigned, SDValue>, 8> &RegsToPass, SDValue InFlag,
4977 SDValue Chain, SDValue CallSeqStart, SDValue &Callee, int SPDiff,
4978 unsigned NumBytes, const SmallVectorImpl<ISD::InputArg> &Ins,
4979 SmallVectorImpl<SDValue> &InVals, ImmutableCallSite CS) const {
4980 std::vector<EVT> NodeTys;
4981 SmallVector<SDValue, 8> Ops;
4982 unsigned CallOpc = PrepareCall(DAG, Callee, InFlag, Chain, CallSeqStart, dl,
4983 SPDiff, isTailCall, isPatchPoint, hasNest,
4984 RegsToPass, Ops, NodeTys, CS, Subtarget);
4985
4986 // Add implicit use of CR bit 6 for 32-bit SVR4 vararg calls
4987 if (isVarArg && Subtarget.isSVR4ABI() && !Subtarget.isPPC64())
4988 Ops.push_back(DAG.getRegister(PPC::CR1EQ, MVT::i32));
4989
4990 // When performing tail call optimization the callee pops its arguments off
4991 // the stack. Account for this here so these bytes can be pushed back on in
4992 // PPCFrameLowering::eliminateCallFramePseudoInstr.
4993 int BytesCalleePops =
4994 (CallConv == CallingConv::Fast &&
4995 getTargetMachine().Options.GuaranteedTailCallOpt) ? NumBytes : 0;
4996
4997 // Add a register mask operand representing the call-preserved registers.
4998 const TargetRegisterInfo *TRI = Subtarget.getRegisterInfo();
4999 const uint32_t *Mask =
5000 TRI->getCallPreservedMask(DAG.getMachineFunction(), CallConv);
5001 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5001, __extension__ __PRETTY_FUNCTION__))
;
5002 Ops.push_back(DAG.getRegisterMask(Mask));
5003
5004 if (InFlag.getNode())
5005 Ops.push_back(InFlag);
5006
5007 // Emit tail call.
5008 if (isTailCall) {
5009 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)) && "Expecting an global address, external symbol, absolute value or register"
) ? 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)) && \"Expecting an global address, external symbol, absolute value or register\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5014, __extension__ __PRETTY_FUNCTION__))
5010 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)) && "Expecting an global address, external symbol, absolute value or register"
) ? 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)) && \"Expecting an global address, external symbol, absolute value or register\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5014, __extension__ __PRETTY_FUNCTION__))
5011 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)) && "Expecting an global address, external symbol, absolute value or register"
) ? 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)) && \"Expecting an global address, external symbol, absolute value or register\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5014, __extension__ __PRETTY_FUNCTION__))
5012 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)) && "Expecting an global address, external symbol, absolute value or register"
) ? 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)) && \"Expecting an global address, external symbol, absolute value or register\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5014, __extension__ __PRETTY_FUNCTION__))
5013 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)) && "Expecting an global address, external symbol, absolute value or register"
) ? 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)) && \"Expecting an global address, external symbol, absolute value or register\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5014, __extension__ __PRETTY_FUNCTION__))
5014 "Expecting an global address, external symbol, absolute value or 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)) && "Expecting an global address, external symbol, absolute value or register"
) ? 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)) && \"Expecting an global address, external symbol, absolute value or register\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5014, __extension__ __PRETTY_FUNCTION__))
;
5015
5016 DAG.getMachineFunction().getFrameInfo().setHasTailCall();
5017 return DAG.getNode(PPCISD::TC_RETURN, dl, MVT::Other, Ops);
5018 }
5019
5020 // Add a NOP immediately after the branch instruction when using the 64-bit
5021 // SVR4 ABI. At link time, if caller and callee are in a different module and
5022 // thus have a different TOC, the call will be replaced with a call to a stub
5023 // function which saves the current TOC, loads the TOC of the callee and
5024 // branches to the callee. The NOP will be replaced with a load instruction
5025 // which restores the TOC of the caller from the TOC save slot of the current
5026 // stack frame. If caller and callee belong to the same module (and have the
5027 // same TOC), the NOP will remain unchanged.
5028
5029 MachineFunction &MF = DAG.getMachineFunction();
5030 if (!isTailCall && Subtarget.isSVR4ABI()&& Subtarget.isPPC64() &&
5031 !isPatchPoint) {
5032 if (CallOpc == PPCISD::BCTRL) {
5033 // This is a call through a function pointer.
5034 // Restore the caller TOC from the save area into R2.
5035 // See PrepareCall() for more information about calls through function
5036 // pointers in the 64-bit SVR4 ABI.
5037 // We are using a target-specific load with r2 hard coded, because the
5038 // result of a target-independent load would never go directly into r2,
5039 // since r2 is a reserved register (which prevents the register allocator
5040 // from allocating it), resulting in an additional register being
5041 // allocated and an unnecessary move instruction being generated.
5042 CallOpc = PPCISD::BCTRL_LOAD_TOC;
5043
5044 EVT PtrVT = getPointerTy(DAG.getDataLayout());
5045 SDValue StackPtr = DAG.getRegister(PPC::X1, PtrVT);
5046 unsigned TOCSaveOffset = Subtarget.getFrameLowering()->getTOCSaveOffset();
5047 SDValue TOCOff = DAG.getIntPtrConstant(TOCSaveOffset, dl);
5048 SDValue AddTOC = DAG.getNode(ISD::ADD, dl, MVT::i64, StackPtr, TOCOff);
5049
5050 // The address needs to go after the chain input but before the flag (or
5051 // any other variadic arguments).
5052 Ops.insert(std::next(Ops.begin()), AddTOC);
5053 } else if (CallOpc == PPCISD::CALL &&
5054 !callsShareTOCBase(&MF.getFunction(), Callee, DAG.getTarget())) {
5055 // Otherwise insert NOP for non-local calls.
5056 CallOpc = PPCISD::CALL_NOP;
5057 }
5058 }
5059
5060 Chain = DAG.getNode(CallOpc, dl, NodeTys, Ops);
5061 InFlag = Chain.getValue(1);
5062
5063 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, dl, true),
5064 DAG.getIntPtrConstant(BytesCalleePops, dl, true),
5065 InFlag, dl);
5066 if (!Ins.empty())
5067 InFlag = Chain.getValue(1);
5068
5069 return LowerCallResult(Chain, InFlag, CallConv, isVarArg,
5070 Ins, dl, DAG, InVals);
5071}
5072
5073SDValue
5074PPCTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
5075 SmallVectorImpl<SDValue> &InVals) const {
5076 SelectionDAG &DAG = CLI.DAG;
5077 SDLoc &dl = CLI.DL;
5078 SmallVectorImpl<ISD::OutputArg> &Outs = CLI.Outs;
5079 SmallVectorImpl<SDValue> &OutVals = CLI.OutVals;
5080 SmallVectorImpl<ISD::InputArg> &Ins = CLI.Ins;
5081 SDValue Chain = CLI.Chain;
5082 SDValue Callee = CLI.Callee;
5083 bool &isTailCall = CLI.IsTailCall;
5084 CallingConv::ID CallConv = CLI.CallConv;
5085 bool isVarArg = CLI.IsVarArg;
5086 bool isPatchPoint = CLI.IsPatchPoint;
5087 ImmutableCallSite CS = CLI.CS;
5088
5089 if (isTailCall) {
5090 if (Subtarget.useLongCalls() && !(CS && CS.isMustTailCall()))
5091 isTailCall = false;
5092 else if (Subtarget.isSVR4ABI() && Subtarget.isPPC64())
5093 isTailCall =
5094 IsEligibleForTailCallOptimization_64SVR4(Callee, CallConv, CS,
5095 isVarArg, Outs, Ins, DAG);
5096 else
5097 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv, isVarArg,
5098 Ins, DAG);
5099 if (isTailCall) {
5100 ++NumTailCalls;
5101 if (!getTargetMachine().Options.GuaranteedTailCallOpt)
5102 ++NumSiblingCalls;
5103
5104 assert(isa<GlobalAddressSDNode>(Callee) &&(static_cast <bool> (isa<GlobalAddressSDNode>(Callee
) && "Callee should be an llvm::Function object.") ? void
(0) : __assert_fail ("isa<GlobalAddressSDNode>(Callee) && \"Callee should be an llvm::Function object.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5105, __extension__ __PRETTY_FUNCTION__))
5105 "Callee should be an llvm::Function object.")(static_cast <bool> (isa<GlobalAddressSDNode>(Callee
) && "Callee should be an llvm::Function object.") ? void
(0) : __assert_fail ("isa<GlobalAddressSDNode>(Callee) && \"Callee should be an llvm::Function object.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5105, __extension__ __PRETTY_FUNCTION__))
;
5106 DEBUG(do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
5107 const GlobalValue *GV = cast<GlobalAddressSDNode>(Callee)->getGlobal();do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
5108 const unsigned Width = 80 - strlen("TCO caller: ")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
5109 - strlen(", callee linkage: 0, 0");do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
5110 dbgs() << "TCO caller: "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
5111 << left_justify(DAG.getMachineFunction().getName(), Width)do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
5112 << ", callee linkage: "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
5113 << GV->getVisibility() << ", " << GV->getLinkage() << "\n"do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
5114 )do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("ppc-lowering")) { const GlobalValue *GV = cast<GlobalAddressSDNode
>(Callee)->getGlobal(); const unsigned Width = 80 - strlen
("TCO caller: ") - strlen(", callee linkage: 0, 0"); dbgs() <<
"TCO caller: " << left_justify(DAG.getMachineFunction(
).getName(), Width) << ", callee linkage: " << GV
->getVisibility() << ", " << GV->getLinkage
() << "\n"; } } while (false)
;
5115 }
5116 }
5117
5118 if (!isTailCall && CS && CS.isMustTailCall())
5119 report_fatal_error("failed to perform tail call elimination on a call "
5120 "site marked musttail");
5121
5122 // When long calls (i.e. indirect calls) are always used, calls are always
5123 // made via function pointer. If we have a function name, first translate it
5124 // into a pointer.
5125 if (Subtarget.useLongCalls() && isa<GlobalAddressSDNode>(Callee) &&
5126 !isTailCall)
5127 Callee = LowerGlobalAddress(Callee, DAG);
5128
5129 if (Subtarget.isSVR4ABI()) {
5130 if (Subtarget.isPPC64())
5131 return LowerCall_64SVR4(Chain, Callee, CallConv, isVarArg,
5132 isTailCall, isPatchPoint, Outs, OutVals, Ins,
5133 dl, DAG, InVals, CS);
5134 else
5135 return LowerCall_32SVR4(Chain, Callee, CallConv, isVarArg,
5136 isTailCall, isPatchPoint, Outs, OutVals, Ins,
5137 dl, DAG, InVals, CS);
5138 }
5139
5140 return LowerCall_Darwin(Chain, Callee, CallConv, isVarArg,
5141 isTailCall, isPatchPoint, Outs, OutVals, Ins,
5142 dl, DAG, InVals, CS);
5143}
5144
5145SDValue PPCTargetLowering::LowerCall_32SVR4(
5146 SDValue Chain, SDValue Callee, CallingConv::ID CallConv, bool isVarArg,
5147 bool isTailCall, bool isPatchPoint,
5148 const SmallVectorImpl<ISD::OutputArg> &Outs,
5149 const SmallVectorImpl<SDValue> &OutVals,
5150 const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
5151 SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals,
5152 ImmutableCallSite CS) const {
5153 // See PPCTargetLowering::LowerFormalArguments_32SVR4() for a description
5154 // of the 32-bit SVR4 ABI stack frame layout.
5155
5156 assert((CallConv == CallingConv::C ||(static_cast <bool> ((CallConv == CallingConv::C || CallConv
== CallingConv::Fast) && "Unknown calling convention!"
) ? void (0) : __assert_fail ("(CallConv == CallingConv::C || CallConv == CallingConv::Fast) && \"Unknown calling convention!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5157, __extension__ __PRETTY_FUNCTION__))
5157 CallConv == CallingConv::Fast) && "Unknown calling convention!")(static_cast <bool> ((CallConv == CallingConv::C || CallConv
== CallingConv::Fast) && "Unknown calling convention!"
) ? void (0) : __assert_fail ("(CallConv == CallingConv::C || CallConv == CallingConv::Fast) && \"Unknown calling convention!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5157, __extension__ __PRETTY_FUNCTION__))
;
5158
5159 unsigned PtrByteSize = 4;
5160
5161 MachineFunction &MF = DAG.getMachineFunction();
5162
5163 // Mark this function as potentially containing a function that contains a
5164 // tail call. As a consequence the frame pointer will be used for dynamicalloc
5165 // and restoring the callers stack pointer in this functions epilog. This is
5166 // done because by tail calling the called function might overwrite the value
5167 // in this function's (MF) stack pointer stack slot 0(SP).
5168 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
5169 CallConv == CallingConv::Fast)
5170 MF.getInfo<PPCFunctionInfo>()->setHasFastCall();
5171
5172 // Count how many bytes are to be pushed on the stack, including the linkage
5173 // area, parameter list area and the part of the local variable space which
5174 // contains copies of aggregates which are passed by value.
5175
5176 // Assign locations to all of the outgoing arguments.
5177 SmallVector<CCValAssign, 16> ArgLocs;
5178 PPCCCState CCInfo(CallConv, isVarArg, MF, ArgLocs, *DAG.getContext());
5179
5180 // Reserve space for the linkage area on the stack.
5181 CCInfo.AllocateStack(Subtarget.getFrameLowering()->getLinkageSize(),
5182 PtrByteSize);
5183 if (useSoftFloat())
5184 CCInfo.PreAnalyzeCallOperands(Outs);
5185
5186 if (isVarArg) {
5187 // Handle fixed and variable vector arguments differently.
5188 // Fixed vector arguments go into registers as long as registers are
5189 // available. Variable vector arguments always go into memory.
5190 unsigned NumArgs = Outs.size();
5191
5192 for (unsigned i = 0; i != NumArgs; ++i) {
5193 MVT ArgVT = Outs[i].VT;
5194 ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
5195 bool Result;
5196
5197 if (Outs[i].IsFixed) {
5198 Result = CC_PPC32_SVR4(i, ArgVT, ArgVT, CCValAssign::Full, ArgFlags,
5199 CCInfo);
5200 } else {
5201 Result = CC_PPC32_SVR4_VarArg(i, ArgVT, ArgVT, CCValAssign::Full,
5202 ArgFlags, CCInfo);
5203 }
5204
5205 if (Result) {
5206#ifndef NDEBUG
5207 errs() << "Call operand #" << i << " has unhandled type "
5208 << EVT(ArgVT).getEVTString() << "\n";
5209#endif
5210 llvm_unreachable(nullptr)::llvm::llvm_unreachable_internal(nullptr, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5210)
;
5211 }
5212 }
5213 } else {
5214 // All arguments are treated the same.
5215 CCInfo.AnalyzeCallOperands(Outs, CC_PPC32_SVR4);
5216 }
5217 CCInfo.clearWasPPCF128();
5218
5219 // Assign locations to all of the outgoing aggregate by value arguments.
5220 SmallVector<CCValAssign, 16> ByValArgLocs;
5221 CCState CCByValInfo(CallConv, isVarArg, MF, ByValArgLocs, *DAG.getContext());
5222
5223 // Reserve stack space for the allocations in CCInfo.
5224 CCByValInfo.AllocateStack(CCInfo.getNextStackOffset(), PtrByteSize);
5225
5226 CCByValInfo.AnalyzeCallOperands(Outs, CC_PPC32_SVR4_ByVal);
5227
5228 // Size of the linkage area, parameter list area and the part of the local
5229 // space variable where copies of aggregates which are passed by value are
5230 // stored.
5231 unsigned NumBytes = CCByValInfo.getNextStackOffset();
5232
5233 // Calculate by how many bytes the stack has to be adjusted in case of tail
5234 // call optimization.
5235 int SPDiff = CalculateTailCallSPDiff(DAG, isTailCall, NumBytes);
5236
5237 // Adjust the stack pointer for the new arguments...
5238 // These operations are automatically eliminated by the prolog/epilog pass
5239 Chain = DAG.getCALLSEQ_START(Chain, NumBytes, 0, dl);
5240 SDValue CallSeqStart = Chain;
5241
5242 // Load the return address and frame pointer so it can be moved somewhere else
5243 // later.
5244 SDValue LROp, FPOp;
5245 Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, dl);
5246
5247 // Set up a copy of the stack pointer for use loading and storing any
5248 // arguments that may not fit in the registers available for argument
5249 // passing.
5250 SDValue StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
5251
5252 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
5253 SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
5254 SmallVector<SDValue, 8> MemOpChains;
5255
5256 bool seenFloatArg = false;
5257 // Walk the register/memloc assignments, inserting copies/loads.
5258 for (unsigned i = 0, j = 0, e = ArgLocs.size();
5259 i != e;
5260 ++i) {
5261 CCValAssign &VA = ArgLocs[i];
5262 SDValue Arg = OutVals[i];
5263 ISD::ArgFlagsTy Flags = Outs[i].Flags;
5264
5265 if (Flags.isByVal()) {
5266 // Argument is an aggregate which is passed by value, thus we need to
5267 // create a copy of it in the local variable space of the current stack
5268 // frame (which is the stack frame of the caller) and pass the address of
5269 // this copy to the callee.
5270 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5270, __extension__ __PRETTY_FUNCTION__))
;
5271 CCValAssign &ByValVA = ByValArgLocs[j++];
5272 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5272, __extension__ __PRETTY_FUNCTION__))
;
5273
5274 // Memory reserved in the local variable space of the callers stack frame.
5275 unsigned LocMemOffset = ByValVA.getLocMemOffset();
5276
5277 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl);
5278 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(MF.getDataLayout()),
5279 StackPtr, PtrOff);
5280
5281 // Create a copy of the argument in the local area of the current
5282 // stack frame.
5283 SDValue MemcpyCall =
5284 CreateCopyOfByValArgument(Arg, PtrOff,
5285 CallSeqStart.getNode()->getOperand(0),
5286 Flags, DAG, dl);
5287
5288 // This must go outside the CALLSEQ_START..END.
5289 SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall, NumBytes, 0,
5290 SDLoc(MemcpyCall));
5291 DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
5292 NewCallSeqStart.getNode());
5293 Chain = CallSeqStart = NewCallSeqStart;
5294
5295 // Pass the address of the aggregate copy on the stack either in a
5296 // physical register or in the parameter list area of the current stack
5297 // frame to the callee.
5298 Arg = PtrOff;
5299 }
5300
5301 if (VA.isRegLoc()) {
5302 if (Arg.getValueType() == MVT::i1)
5303 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Arg);
5304
5305 seenFloatArg |= VA.getLocVT().isFloatingPoint();
5306 // Put argument in a physical register.
5307 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
5308 } else {
5309 // Put argument in the parameter list area of the current stack frame.
5310 assert(VA.isMemLoc())(static_cast <bool> (VA.isMemLoc()) ? void (0) : __assert_fail
("VA.isMemLoc()", "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5310, __extension__ __PRETTY_FUNCTION__))
;
5311 unsigned LocMemOffset = VA.getLocMemOffset();
5312
5313 if (!isTailCall) {
5314 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset, dl);
5315 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(MF.getDataLayout()),
5316 StackPtr, PtrOff);
5317
5318 MemOpChains.push_back(
5319 DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo()));
5320 } else {
5321 // Calculate and remember argument location.
5322 CalculateTailCallArgDest(DAG, MF, false, Arg, SPDiff, LocMemOffset,
5323 TailCallArguments);
5324 }
5325 }
5326 }
5327
5328 if (!MemOpChains.empty())
5329 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
5330
5331 // Build a sequence of copy-to-reg nodes chained together with token chain
5332 // and flag operands which copy the outgoing args into the appropriate regs.
5333 SDValue InFlag;
5334 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
5335 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
5336 RegsToPass[i].second, InFlag);
5337 InFlag = Chain.getValue(1);
5338 }
5339
5340 // Set CR bit 6 to true if this is a vararg call with floating args passed in
5341 // registers.
5342 if (isVarArg) {
5343 SDVTList VTs = DAG.getVTList(MVT::Other, MVT::Glue);
5344 SDValue Ops[] = { Chain, InFlag };
5345
5346 Chain = DAG.getNode(seenFloatArg ? PPCISD::CR6SET : PPCISD::CR6UNSET,
5347 dl, VTs, makeArrayRef(Ops, InFlag.getNode() ? 2 : 1));
5348
5349 InFlag = Chain.getValue(1);
5350 }
5351
5352 if (isTailCall)
5353 PrepareTailCall(DAG, InFlag, Chain, dl, SPDiff, NumBytes, LROp, FPOp,
5354 TailCallArguments);
5355
5356 return FinishCall(CallConv, dl, isTailCall, isVarArg, isPatchPoint,
5357 /* unused except on PPC64 ELFv1 */ false, DAG,
5358 RegsToPass, InFlag, Chain, CallSeqStart, Callee, SPDiff,
5359 NumBytes, Ins, InVals, CS);
5360}
5361
5362// Copy an argument into memory, being careful to do this outside the
5363// call sequence for the call to which the argument belongs.
5364SDValue PPCTargetLowering::createMemcpyOutsideCallSeq(
5365 SDValue Arg, SDValue PtrOff, SDValue CallSeqStart, ISD::ArgFlagsTy Flags,
5366 SelectionDAG &DAG, const SDLoc &dl) const {
5367 SDValue MemcpyCall = CreateCopyOfByValArgument(Arg, PtrOff,
5368 CallSeqStart.getNode()->getOperand(0),
5369 Flags, DAG, dl);
5370 // The MEMCPY must go outside the CALLSEQ_START..END.
5371 int64_t FrameSize = CallSeqStart.getConstantOperandVal(1);
5372 SDValue NewCallSeqStart = DAG.getCALLSEQ_START(MemcpyCall, FrameSize, 0,
5373 SDLoc(MemcpyCall));
5374 DAG.ReplaceAllUsesWith(CallSeqStart.getNode(),
5375 NewCallSeqStart.getNode());
5376 return NewCallSeqStart;
5377}
5378
5379SDValue PPCTargetLowering::LowerCall_64SVR4(
5380 SDValue Chain, SDValue Callee, CallingConv::ID CallConv, bool isVarArg,
5381 bool isTailCall, bool isPatchPoint,
5382 const SmallVectorImpl<ISD::OutputArg> &Outs,
5383 const SmallVectorImpl<SDValue> &OutVals,
5384 const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
5385 SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals,
5386 ImmutableCallSite CS) const {
5387 bool isELFv2ABI = Subtarget.isELFv2ABI();
5388 bool isLittleEndian = Subtarget.isLittleEndian();
5389 unsigned NumOps = Outs.size();
5390 bool hasNest = false;
5391 bool IsSibCall = false;
5392
5393 EVT PtrVT = getPointerTy(DAG.getDataLayout());
5394 unsigned PtrByteSize = 8;
5395
5396 MachineFunction &MF = DAG.getMachineFunction();
5397
5398 if (isTailCall && !getTargetMachine().Options.GuaranteedTailCallOpt)
5399 IsSibCall = true;
5400
5401 // Mark this function as potentially containing a function that contains a
5402 // tail call. As a consequence the frame pointer will be used for dynamicalloc
5403 // and restoring the callers stack pointer in this functions epilog. This is
5404 // done because by tail calling the called function might overwrite the value
5405 // in this function's (MF) stack pointer stack slot 0(SP).
5406 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
5407 CallConv == CallingConv::Fast)
5408 MF.getInfo<PPCFunctionInfo>()->setHasFastCall();
5409
5410 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5411, __extension__ __PRETTY_FUNCTION__))
5411 "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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5411, __extension__ __PRETTY_FUNCTION__))
;
5412
5413 // Count how many bytes are to be pushed on the stack, including the linkage
5414 // area, and parameter passing area. On ELFv1, the linkage area is 48 bytes
5415 // reserved space for [SP][CR][LR][2 x unused][TOC]; on ELFv2, the linkage
5416 // area is 32 bytes reserved space for [SP][CR][LR][TOC].
5417 unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
5418 unsigned NumBytes = LinkageSize;
5419 unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
5420 unsigned &QFPR_idx = FPR_idx;
5421
5422 static const MCPhysReg GPR[] = {
5423 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
5424 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
5425 };
5426 static const MCPhysReg VR[] = {
5427 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
5428 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
5429 };
5430
5431 const unsigned NumGPRs = array_lengthof(GPR);
5432 const unsigned NumFPRs = useSoftFloat() ? 0 : 13;
5433 const unsigned NumVRs = array_lengthof(VR);
5434 const unsigned NumQFPRs = NumFPRs;
5435
5436 // On ELFv2, we can avoid allocating the parameter area if all the arguments
5437 // can be passed to the callee in registers.
5438 // For the fast calling convention, there is another check below.
5439 // Note: We should keep consistent with LowerFormalArguments_64SVR4()
5440 bool HasParameterArea = !isELFv2ABI || isVarArg || CallConv == CallingConv::Fast;
5441 if (!HasParameterArea) {
5442 unsigned ParamAreaSize = NumGPRs * PtrByteSize;
5443 unsigned AvailableFPRs = NumFPRs;
5444 unsigned AvailableVRs = NumVRs;
5445 unsigned NumBytesTmp = NumBytes;
5446 for (unsigned i = 0; i != NumOps; ++i) {
5447 if (Outs[i].Flags.isNest()) continue;
5448 if (CalculateStackSlotUsed(Outs[i].VT, Outs[i].ArgVT, Outs[i].Flags,
5449 PtrByteSize, LinkageSize, ParamAreaSize,
5450 NumBytesTmp, AvailableFPRs, AvailableVRs,
5451 Subtarget.hasQPX()))
5452 HasParameterArea = true;
5453 }
5454 }
5455
5456 // When using the fast calling convention, we don't provide backing for
5457 // arguments that will be in registers.
5458 unsigned NumGPRsUsed = 0, NumFPRsUsed = 0, NumVRsUsed = 0;
5459
5460 // Add up all the space actually used.
5461 for (unsigned i = 0; i != NumOps; ++i) {
5462 ISD::ArgFlagsTy Flags = Outs[i].Flags;
5463 EVT ArgVT = Outs[i].VT;
5464 EVT OrigVT = Outs[i].ArgVT;
5465
5466 if (Flags.isNest())
5467 continue;
5468
5469 if (CallConv == CallingConv::Fast) {
5470 if (Flags.isByVal())
5471 NumGPRsUsed += (Flags.getByValSize()+7)/8;
5472 else
5473 switch (ArgVT.getSimpleVT().SimpleTy) {
5474 default: llvm_unreachable("Unexpected ValueType for argument!")::llvm::llvm_unreachable_internal("Unexpected ValueType for argument!"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5474)
;
5475 case MVT::i1:
5476 case MVT::i32:
5477 case MVT::i64:
5478 if (++NumGPRsUsed <= NumGPRs)
5479 continue;
5480 break;
5481 case MVT::v4i32:
5482 case MVT::v8i16:
5483 case MVT::v16i8:
5484 case MVT::v2f64:
5485 case MVT::v2i64:
5486 case MVT::v1i128:
5487 if (++NumVRsUsed <= NumVRs)
5488 continue;
5489 break;
5490 case MVT::v4f32:
5491 // When using QPX, this is handled like a FP register, otherwise, it
5492 // is an Altivec register.
5493 if (Subtarget.hasQPX()) {
5494 if (++NumFPRsUsed <= NumFPRs)
5495 continue;
5496 } else {
5497 if (++NumVRsUsed <= NumVRs)
5498 continue;
5499 }
5500 break;
5501 case MVT::f32:
5502 case MVT::f64:
5503 case MVT::v4f64: // QPX
5504 case MVT::v4i1: // QPX
5505 if (++NumFPRsUsed <= NumFPRs)
5506 continue;
5507 break;
5508 }
5509 }
5510
5511 /* Respect alignment of argument on the stack. */
5512 unsigned Align =
5513 CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
5514 NumBytes = ((NumBytes + Align - 1) / Align) * Align;
5515
5516 NumBytes += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
5517 if (Flags.isInConsecutiveRegsLast())
5518 NumBytes = ((NumBytes + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
5519 }
5520
5521 unsigned NumBytesActuallyUsed = NumBytes;
5522
5523 // In the old ELFv1 ABI,
5524 // the prolog code of the callee may store up to 8 GPR argument registers to
5525 // the stack, allowing va_start to index over them in memory if its varargs.
5526 // Because we cannot tell if this is needed on the caller side, we have to
5527 // conservatively assume that it is needed. As such, make sure we have at
5528 // least enough stack space for the caller to store the 8 GPRs.
5529 // In the ELFv2 ABI, we allocate the parameter area iff a callee
5530 // really requires memory operands, e.g. a vararg function.
5531 if (HasParameterArea)
5532 NumBytes = std::max(NumBytes, LinkageSize + 8 * PtrByteSize);
5533 else
5534 NumBytes = LinkageSize;
5535
5536 // Tail call needs the stack to be aligned.
5537 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
5538 CallConv == CallingConv::Fast)
5539 NumBytes = EnsureStackAlignment(Subtarget.getFrameLowering(), NumBytes);
5540
5541 int SPDiff = 0;
5542
5543 // Calculate by how many bytes the stack has to be adjusted in case of tail
5544 // call optimization.
5545 if (!IsSibCall)
5546 SPDiff = CalculateTailCallSPDiff(DAG, isTailCall, NumBytes);
5547
5548 // To protect arguments on the stack from being clobbered in a tail call,
5549 // force all the loads to happen before doing any other lowering.
5550 if (isTailCall)
5551 Chain = DAG.getStackArgumentTokenFactor(Chain);
5552
5553 // Adjust the stack pointer for the new arguments...
5554 // These operations are automatically eliminated by the prolog/epilog pass
5555 if (!IsSibCall)
5556 Chain = DAG.getCALLSEQ_START(Chain, NumBytes, 0, dl);
5557 SDValue CallSeqStart = Chain;
5558
5559 // Load the return address and frame pointer so it can be move somewhere else
5560 // later.
5561 SDValue LROp, FPOp;
5562 Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, dl);
5563
5564 // Set up a copy of the stack pointer for use loading and storing any
5565 // arguments that may not fit in the registers available for argument
5566 // passing.
5567 SDValue StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
5568
5569 // Figure out which arguments are going to go in registers, and which in
5570 // memory. Also, if this is a vararg function, floating point operations
5571 // must be stored to our stack, and loaded into integer regs as well, if
5572 // any integer regs are available for argument passing.
5573 unsigned ArgOffset = LinkageSize;
5574
5575 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
5576 SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
5577
5578 SmallVector<SDValue, 8> MemOpChains;
5579 for (unsigned i = 0; i != NumOps; ++i) {
5580 SDValue Arg = OutVals[i];
5581 ISD::ArgFlagsTy Flags = Outs[i].Flags;
5582 EVT ArgVT = Outs[i].VT;
5583 EVT OrigVT = Outs[i].ArgVT;
5584
5585 // PtrOff will be used to store the current argument to the stack if a
5586 // register cannot be found for it.
5587 SDValue PtrOff;
5588
5589 // We re-align the argument offset for each argument, except when using the
5590 // fast calling convention, when we need to make sure we do that only when
5591 // we'll actually use a stack slot.
5592 auto ComputePtrOff = [&]() {
5593 /* Respect alignment of argument on the stack. */
5594 unsigned Align =
5595 CalculateStackSlotAlignment(ArgVT, OrigVT, Flags, PtrByteSize);
5596 ArgOffset = ((ArgOffset + Align - 1) / Align) * Align;
5597
5598 PtrOff = DAG.getConstant(ArgOffset, dl, StackPtr.getValueType());
5599
5600 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
5601 };
5602
5603 if (CallConv != CallingConv::Fast) {
5604 ComputePtrOff();
5605
5606 /* Compute GPR index associated with argument offset. */
5607 GPR_idx = (ArgOffset - LinkageSize) / PtrByteSize;
5608 GPR_idx = std::min(GPR_idx, NumGPRs);
5609 }
5610
5611 // Promote integers to 64-bit values.
5612 if (Arg.getValueType() == MVT::i32 || Arg.getValueType() == MVT::i1) {
5613 // FIXME: Should this use ANY_EXTEND if neither sext nor zext?
5614 unsigned ExtOp = Flags.isSExt() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
5615 Arg = DAG.getNode(ExtOp, dl, MVT::i64, Arg);
5616 }
5617
5618 // FIXME memcpy is used way more than necessary. Correctness first.
5619 // Note: "by value" is code for passing a structure by value, not
5620 // basic types.
5621 if (Flags.isByVal()) {
5622 // Note: Size includes alignment padding, so
5623 // struct x { short a; char b; }
5624 // will have Size = 4. With #pragma pack(1), it will have Size = 3.
5625 // These are the proper values we need for right-justifying the
5626 // aggregate in a parameter register.
5627 unsigned Size = Flags.getByValSize();
5628
5629 // An empty aggregate parameter takes up no storage and no
5630 // registers.
5631 if (Size == 0)
5632 continue;
5633
5634 if (CallConv == CallingConv::Fast)
5635 ComputePtrOff();
5636
5637 // All aggregates smaller than 8 bytes must be passed right-justified.
5638 if (Size==1 || Size==2 || Size==4) {
5639 EVT VT = (Size==1) ? MVT::i8 : ((Size==2) ? MVT::i16 : MVT::i32);
5640 if (GPR_idx != NumGPRs) {
5641 SDValue Load = DAG.getExtLoad(ISD::EXTLOAD, dl, PtrVT, Chain, Arg,
5642 MachinePointerInfo(), VT);
5643 MemOpChains.push_back(Load.getValue(1));
5644 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
5645
5646 ArgOffset += PtrByteSize;
5647 continue;
5648 }
5649 }
5650
5651 if (GPR_idx == NumGPRs && Size < 8) {
5652 SDValue AddPtr = PtrOff;
5653 if (!isLittleEndian) {
5654 SDValue Const = DAG.getConstant(PtrByteSize - Size, dl,
5655 PtrOff.getValueType());
5656 AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
5657 }
5658 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, AddPtr,
5659 CallSeqStart,
5660 Flags, DAG, dl);
5661 ArgOffset += PtrByteSize;
5662 continue;
5663 }
5664 // Copy entire object into memory. There are cases where gcc-generated
5665 // code assumes it is there, even if it could be put entirely into
5666 // registers. (This is not what the doc says.)
5667
5668 // FIXME: The above statement is likely due to a misunderstanding of the
5669 // documents. All arguments must be copied into the parameter area BY
5670 // THE CALLEE in the event that the callee takes the address of any
5671 // formal argument. That has not yet been implemented. However, it is
5672 // reasonable to use the stack area as a staging area for the register
5673 // load.
5674
5675 // Skip this for small aggregates, as we will use the same slot for a
5676 // right-justified copy, below.
5677 if (Size >= 8)
5678 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, PtrOff,
5679 CallSeqStart,
5680 Flags, DAG, dl);
5681
5682 // When a register is available, pass a small aggregate right-justified.
5683 if (Size < 8 && GPR_idx != NumGPRs) {
5684 // The easiest way to get this right-justified in a register
5685 // is to copy the structure into the rightmost portion of a
5686 // local variable slot, then load the whole slot into the
5687 // register.
5688 // FIXME: The memcpy seems to produce pretty awful code for
5689 // small aggregates, particularly for packed ones.
5690 // FIXME: It would be preferable to use the slot in the
5691 // parameter save area instead of a new local variable.
5692 SDValue AddPtr = PtrOff;
5693 if (!isLittleEndian) {
5694 SDValue Const = DAG.getConstant(8 - Size, dl, PtrOff.getValueType());
5695 AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
5696 }
5697 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, AddPtr,
5698 CallSeqStart,
5699 Flags, DAG, dl);
5700
5701 // Load the slot into the register.
5702 SDValue Load =
5703 DAG.getLoad(PtrVT, dl, Chain, PtrOff, MachinePointerInfo());
5704 MemOpChains.push_back(Load.getValue(1));
5705 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
5706
5707 // Done with this argument.
5708 ArgOffset += PtrByteSize;
5709 continue;
5710 }
5711
5712 // For aggregates larger than PtrByteSize, copy the pieces of the
5713 // object that fit into registers from the parameter save area.
5714 for (unsigned j=0; j<Size; j+=PtrByteSize) {
5715 SDValue Const = DAG.getConstant(j, dl, PtrOff.getValueType());
5716 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
5717 if (GPR_idx != NumGPRs) {
5718 SDValue Load =
5719 DAG.getLoad(PtrVT, dl, Chain, AddArg, MachinePointerInfo());
5720 MemOpChains.push_back(Load.getValue(1));
5721 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
5722 ArgOffset += PtrByteSize;
5723 } else {
5724 ArgOffset += ((Size - j + PtrByteSize-1)/PtrByteSize)*PtrByteSize;
5725 break;
5726 }
5727 }
5728 continue;
5729 }
5730
5731 switch (Arg.getSimpleValueType().SimpleTy) {
5732 default: llvm_unreachable("Unexpected ValueType for argument!")::llvm::llvm_unreachable_internal("Unexpected ValueType for argument!"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5732)
;
5733 case MVT::i1:
5734 case MVT::i32:
5735 case MVT::i64:
5736 if (Flags.isNest()) {
5737 // The 'nest' parameter, if any, is passed in R11.
5738 RegsToPass.push_back(std::make_pair(PPC::X11, Arg));
5739 hasNest = true;
5740 break;
5741 }
5742
5743 // These can be scalar arguments or elements of an integer array type
5744 // passed directly. Clang may use those instead of "byval" aggregate
5745 // types to avoid forcing arguments to memory unnecessarily.
5746 if (GPR_idx != NumGPRs) {
5747 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Arg));
5748 } else {
5749 if (CallConv == CallingConv::Fast)
5750 ComputePtrOff();
5751
5752 assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5753, __extension__ __PRETTY_FUNCTION__))
5753 "Parameter area must exist to pass an argument in memory.")(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5753, __extension__ __PRETTY_FUNCTION__))
;
5754 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
5755 true, isTailCall, false, MemOpChains,
5756 TailCallArguments, dl);
5757 if (CallConv == CallingConv::Fast)
5758 ArgOffset += PtrByteSize;
5759 }
5760 if (CallConv != CallingConv::Fast)
5761 ArgOffset += PtrByteSize;
5762 break;
5763 case MVT::f32:
5764 case MVT::f64: {
5765 // These can be scalar arguments or elements of a float array type
5766 // passed directly. The latter are used to implement ELFv2 homogenous
5767 // float aggregates.
5768
5769 // Named arguments go into FPRs first, and once they overflow, the
5770 // remaining arguments go into GPRs and then the parameter save area.
5771 // Unnamed arguments for vararg functions always go to GPRs and
5772 // then the parameter save area. For now, put all arguments to vararg
5773 // routines always in both locations (FPR *and* GPR or stack slot).
5774 bool NeedGPROrStack = isVarArg || FPR_idx == NumFPRs;
5775 bool NeededLoad = false;
5776
5777 // First load the argument into the next available FPR.
5778 if (FPR_idx != NumFPRs)
5779 RegsToPass.push_back(std::make_pair(FPR[FPR_idx++], Arg));
5780
5781 // Next, load the argument into GPR or stack slot if needed.
5782 if (!NeedGPROrStack)
5783 ;
5784 else if (GPR_idx != NumGPRs && CallConv != CallingConv::Fast) {
5785 // FIXME: We may want to re-enable this for CallingConv::Fast on the P8
5786 // once we support fp <-> gpr moves.
5787
5788 // In the non-vararg case, this can only ever happen in the
5789 // presence of f32 array types, since otherwise we never run
5790 // out of FPRs before running out of GPRs.
5791 SDValue ArgVal;
5792
5793 // Double values are always passed in a single GPR.
5794 if (Arg.getValueType() != MVT::f32) {
5795 ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i64, Arg);
5796
5797 // Non-array float values are extended and passed in a GPR.
5798 } else if (!Flags.isInConsecutiveRegs()) {
5799 ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
5800 ArgVal = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i64, ArgVal);
5801
5802 // If we have an array of floats, we collect every odd element
5803 // together with its predecessor into one GPR.
5804 } else if (ArgOffset % PtrByteSize != 0) {
5805 SDValue Lo, Hi;
5806 Lo = DAG.getNode(ISD::BITCAST, dl, MVT::i32, OutVals[i - 1]);
5807 Hi = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
5808 if (!isLittleEndian)
5809 std::swap(Lo, Hi);
5810 ArgVal = DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
5811
5812 // The final element, if even, goes into the first half of a GPR.
5813 } else if (Flags.isInConsecutiveRegsLast()) {
5814 ArgVal = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Arg);
5815 ArgVal = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i64, ArgVal);
5816 if (!isLittleEndian)
5817 ArgVal = DAG.getNode(ISD::SHL, dl, MVT::i64, ArgVal,
5818 DAG.getConstant(32, dl, MVT::i32));
5819
5820 // Non-final even elements are skipped; they will be handled
5821 // together the with subsequent argument on the next go-around.
5822 } else
5823 ArgVal = SDValue();
5824
5825 if (ArgVal.getNode())
5826 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], ArgVal));
5827 } else {
5828 if (CallConv == CallingConv::Fast)
5829 ComputePtrOff();
5830
5831 // Single-precision floating-point values are mapped to the
5832 // second (rightmost) word of the stack doubleword.
5833 if (Arg.getValueType() == MVT::f32 &&
5834 !isLittleEndian && !Flags.isInConsecutiveRegs()) {
5835 SDValue ConstFour = DAG.getConstant(4, dl, PtrOff.getValueType());
5836 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, ConstFour);
5837 }
5838
5839 assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5840, __extension__ __PRETTY_FUNCTION__))
5840 "Parameter area must exist to pass an argument in memory.")(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5840, __extension__ __PRETTY_FUNCTION__))
;
5841 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
5842 true, isTailCall, false, MemOpChains,
5843 TailCallArguments, dl);
5844
5845 NeededLoad = true;
5846 }
5847 // When passing an array of floats, the array occupies consecutive
5848 // space in the argument area; only round up to the next doubleword
5849 // at the end of the array. Otherwise, each float takes 8 bytes.
5850 if (CallConv != CallingConv::Fast || NeededLoad) {
5851 ArgOffset += (Arg.getValueType() == MVT::f32 &&
5852 Flags.isInConsecutiveRegs()) ? 4 : 8;
5853 if (Flags.isInConsecutiveRegsLast())
5854 ArgOffset = ((ArgOffset + PtrByteSize - 1)/PtrByteSize) * PtrByteSize;
5855 }
5856 break;
5857 }
5858 case MVT::v4f32:
5859 case MVT::v4i32:
5860 case MVT::v8i16:
5861 case MVT::v16i8:
5862 case MVT::v2f64:
5863 case MVT::v2i64:
5864 case MVT::v1i128:
5865 if (!Subtarget.hasQPX()) {
5866 // These can be scalar arguments or elements of a vector array type
5867 // passed directly. The latter are used to implement ELFv2 homogenous
5868 // vector aggregates.
5869
5870 // For a varargs call, named arguments go into VRs or on the stack as
5871 // usual; unnamed arguments always go to the stack or the corresponding
5872 // GPRs when within range. For now, we always put the value in both
5873 // locations (or even all three).
5874 if (isVarArg) {
5875 assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist if we have a varargs call."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist if we have a varargs call.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5876, __extension__ __PRETTY_FUNCTION__))
5876 "Parameter area must exist if we have a varargs call.")(static_cast <bool> (HasParameterArea && "Parameter area must exist if we have a varargs call."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist if we have a varargs call.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5876, __extension__ __PRETTY_FUNCTION__))
;
5877 // We could elide this store in the case where the object fits
5878 // entirely in R registers. Maybe later.
5879 SDValue Store =
5880 DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo());
5881 MemOpChains.push_back(Store);
5882 if (VR_idx != NumVRs) {
5883 SDValue Load =
5884 DAG.getLoad(MVT::v4f32, dl, Store, PtrOff, MachinePointerInfo());
5885 MemOpChains.push_back(Load.getValue(1));
5886 RegsToPass.push_back(std::make_pair(VR[VR_idx++], Load));
5887 }
5888 ArgOffset += 16;
5889 for (unsigned i=0; i<16; i+=PtrByteSize) {
5890 if (GPR_idx == NumGPRs)
5891 break;
5892 SDValue Ix = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff,
5893 DAG.getConstant(i, dl, PtrVT));
5894 SDValue Load =
5895 DAG.getLoad(PtrVT, dl, Store, Ix, MachinePointerInfo());
5896 MemOpChains.push_back(Load.getValue(1));
5897 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
5898 }
5899 break;
5900 }
5901
5902 // Non-varargs Altivec params go into VRs or on the stack.
5903 if (VR_idx != NumVRs) {
5904 RegsToPass.push_back(std::make_pair(VR[VR_idx++], Arg));
5905 } else {
5906 if (CallConv == CallingConv::Fast)
5907 ComputePtrOff();
5908
5909 assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5910, __extension__ __PRETTY_FUNCTION__))
5910 "Parameter area must exist to pass an argument in memory.")(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5910, __extension__ __PRETTY_FUNCTION__))
;
5911 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
5912 true, isTailCall, true, MemOpChains,
5913 TailCallArguments, dl);
5914 if (CallConv == CallingConv::Fast)
5915 ArgOffset += 16;
5916 }
5917
5918 if (CallConv != CallingConv::Fast)
5919 ArgOffset += 16;
5920 break;
5921 } // not QPX
5922
5923 assert(Arg.getValueType().getSimpleVT().SimpleTy == MVT::v4f32 &&(static_cast <bool> (Arg.getValueType().getSimpleVT().SimpleTy
== MVT::v4f32 && "Invalid QPX parameter type") ? void
(0) : __assert_fail ("Arg.getValueType().getSimpleVT().SimpleTy == MVT::v4f32 && \"Invalid QPX parameter type\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5924, __extension__ __PRETTY_FUNCTION__))
5924 "Invalid QPX parameter type")(static_cast <bool> (Arg.getValueType().getSimpleVT().SimpleTy
== MVT::v4f32 && "Invalid QPX parameter type") ? void
(0) : __assert_fail ("Arg.getValueType().getSimpleVT().SimpleTy == MVT::v4f32 && \"Invalid QPX parameter type\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5924, __extension__ __PRETTY_FUNCTION__))
;
5925
5926 /* fall through */
5927 case MVT::v4f64:
5928 case MVT::v4i1: {
5929 bool IsF32 = Arg.getValueType().getSimpleVT().SimpleTy == MVT::v4f32;
5930 if (isVarArg) {
5931 assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist if we have a varargs call."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist if we have a varargs call.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5932, __extension__ __PRETTY_FUNCTION__))
5932 "Parameter area must exist if we have a varargs call.")(static_cast <bool> (HasParameterArea && "Parameter area must exist if we have a varargs call."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist if we have a varargs call.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5932, __extension__ __PRETTY_FUNCTION__))
;
5933 // We could elide this store in the case where the object fits
5934 // entirely in R registers. Maybe later.
5935 SDValue Store =
5936 DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo());
5937 MemOpChains.push_back(Store);
5938 if (QFPR_idx != NumQFPRs) {
5939 SDValue Load = DAG.getLoad(IsF32 ? MVT::v4f32 : MVT::v4f64, dl, Store,
5940 PtrOff, MachinePointerInfo());
5941 MemOpChains.push_back(Load.getValue(1));
5942 RegsToPass.push_back(std::make_pair(QFPR[QFPR_idx++], Load));
5943 }
5944 ArgOffset += (IsF32 ? 16 : 32);
5945 for (unsigned i = 0; i < (IsF32 ? 16U : 32U); i += PtrByteSize) {
5946 if (GPR_idx == NumGPRs)
5947 break;
5948 SDValue Ix = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff,
5949 DAG.getConstant(i, dl, PtrVT));
5950 SDValue Load =
5951 DAG.getLoad(PtrVT, dl, Store, Ix, MachinePointerInfo());
5952 MemOpChains.push_back(Load.getValue(1));
5953 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
5954 }
5955 break;
5956 }
5957
5958 // Non-varargs QPX params go into registers or on the stack.
5959 if (QFPR_idx != NumQFPRs) {
5960 RegsToPass.push_back(std::make_pair(QFPR[QFPR_idx++], Arg));
5961 } else {
5962 if (CallConv == CallingConv::Fast)
5963 ComputePtrOff();
5964
5965 assert(HasParameterArea &&(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5966, __extension__ __PRETTY_FUNCTION__))
5966 "Parameter area must exist to pass an argument in memory.")(static_cast <bool> (HasParameterArea && "Parameter area must exist to pass an argument in memory."
) ? void (0) : __assert_fail ("HasParameterArea && \"Parameter area must exist to pass an argument in memory.\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5966, __extension__ __PRETTY_FUNCTION__))
;
5967 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
5968 true, isTailCall, true, MemOpChains,
5969 TailCallArguments, dl);
5970 if (CallConv == CallingConv::Fast)
5971 ArgOffset += (IsF32 ? 16 : 32);
5972 }
5973
5974 if (CallConv != CallingConv::Fast)
5975 ArgOffset += (IsF32 ? 16 : 32);
5976 break;
5977 }
5978 }
5979 }
5980
5981 assert((!HasParameterArea || NumBytesActuallyUsed == ArgOffset) &&(static_cast <bool> ((!HasParameterArea || NumBytesActuallyUsed
== ArgOffset) && "mismatch in size of parameter area"
) ? void (0) : __assert_fail ("(!HasParameterArea || NumBytesActuallyUsed == ArgOffset) && \"mismatch in size of parameter area\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5982, __extension__ __PRETTY_FUNCTION__))
5982 "mismatch in size of parameter area")(static_cast <bool> ((!HasParameterArea || NumBytesActuallyUsed
== ArgOffset) && "mismatch in size of parameter area"
) ? void (0) : __assert_fail ("(!HasParameterArea || NumBytesActuallyUsed == ArgOffset) && \"mismatch in size of parameter area\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 5982, __extension__ __PRETTY_FUNCTION__))
;
5983 (void)NumBytesActuallyUsed;
5984
5985 if (!MemOpChains.empty())
5986 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
5987
5988 // Check if this is an indirect call (MTCTR/BCTRL).
5989 // See PrepareCall() for more information about calls through function
5990 // pointers in the 64-bit SVR4 ABI.
5991 if (!isTailCall && !isPatchPoint &&
5992 !isFunctionGlobalAddress(Callee) &&
5993 !isa<ExternalSymbolSDNode>(Callee)) {
5994 // Load r2 into a virtual register and store it to the TOC save area.
5995 setUsesTOCBasePtr(DAG);
5996 SDValue Val = DAG.getCopyFromReg(Chain, dl, PPC::X2, MVT::i64);
5997 // TOC save area offset.
5998 unsigned TOCSaveOffset = Subtarget.getFrameLowering()->getTOCSaveOffset();
5999 SDValue PtrOff = DAG.getIntPtrConstant(TOCSaveOffset, dl);
6000 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
6001 Chain = DAG.getStore(
6002 Val.getValue(1), dl, Val, AddPtr,
6003 MachinePointerInfo::getStack(DAG.getMachineFunction(), TOCSaveOffset));
6004 // In the ELFv2 ABI, R12 must contain the address of an indirect callee.
6005 // This does not mean the MTCTR instruction must use R12; it's easier
6006 // to model this as an extra parameter, so do that.
6007 if (isELFv2ABI && !isPatchPoint)
6008 RegsToPass.push_back(std::make_pair((unsigned)PPC::X12, Callee));
6009 }
6010
6011 // Build a sequence of copy-to-reg nodes chained together with token chain
6012 // and flag operands which copy the outgoing args into the appropriate regs.
6013 SDValue InFlag;
6014 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
6015 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
6016 RegsToPass[i].second, InFlag);
6017 InFlag = Chain.getValue(1);
6018 }
6019
6020 if (isTailCall && !IsSibCall)
6021 PrepareTailCall(DAG, InFlag, Chain, dl, SPDiff, NumBytes, LROp, FPOp,
6022 TailCallArguments);
6023
6024 return FinishCall(CallConv, dl, isTailCall, isVarArg, isPatchPoint, hasNest,
6025 DAG, RegsToPass, InFlag, Chain, CallSeqStart, Callee,
6026 SPDiff, NumBytes, Ins, InVals, CS);
6027}
6028
6029SDValue PPCTargetLowering::LowerCall_Darwin(
6030 SDValue Chain, SDValue Callee, CallingConv::ID CallConv, bool isVarArg,
6031 bool isTailCall, bool isPatchPoint,
6032 const SmallVectorImpl<ISD::OutputArg> &Outs,
6033 const SmallVectorImpl<SDValue> &OutVals,
6034 const SmallVectorImpl<ISD::InputArg> &Ins, const SDLoc &dl,
6035 SelectionDAG &DAG, SmallVectorImpl<SDValue> &InVals,
6036 ImmutableCallSite CS) const {
6037 unsigned NumOps = Outs.size();
6038
6039 EVT PtrVT = getPointerTy(DAG.getDataLayout());
6040 bool isPPC64 = PtrVT == MVT::i64;
6041 unsigned PtrByteSize = isPPC64 ? 8 : 4;
6042
6043 MachineFunction &MF = DAG.getMachineFunction();
6044
6045 // Mark this function as potentially containing a function that contains a
6046 // tail call. As a consequence the frame pointer will be used for dynamicalloc
6047 // and restoring the callers stack pointer in this functions epilog. This is
6048 // done because by tail calling the called function might overwrite the value
6049 // in this function's (MF) stack pointer stack slot 0(SP).
6050 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
6051 CallConv == CallingConv::Fast)
6052 MF.getInfo<PPCFunctionInfo>()->setHasFastCall();
6053
6054 // Count how many bytes are to be pushed on the stack, including the linkage
6055 // area, and parameter passing area. We start with 24/48 bytes, which is
6056 // prereserved space for [SP][CR][LR][3 x unused].
6057 unsigned LinkageSize = Subtarget.getFrameLowering()->getLinkageSize();
6058 unsigned NumBytes = LinkageSize;
6059
6060 // Add up all the space actually used.
6061 // In 32-bit non-varargs calls, Altivec parameters all go at the end; usually
6062 // they all go in registers, but we must reserve stack space for them for
6063 // possible use by the caller. In varargs or 64-bit calls, parameters are
6064 // assigned stack space in order, with padding so Altivec parameters are
6065 // 16-byte aligned.
6066 unsigned nAltivecParamsAtEnd = 0;
6067 for (unsigned i = 0; i != NumOps; ++i) {
6068 ISD::ArgFlagsTy Flags = Outs[i].Flags;
6069 EVT ArgVT = Outs[i].VT;
6070 // Varargs Altivec parameters are padded to a 16 byte boundary.
6071 if (ArgVT == MVT::v4f32 || ArgVT == MVT::v4i32 ||
6072 ArgVT == MVT::v8i16 || ArgVT == MVT::v16i8 ||
6073 ArgVT == MVT::v2f64 || ArgVT == MVT::v2i64) {
6074 if (!isVarArg && !isPPC64) {
6075 // Non-varargs Altivec parameters go after all the non-Altivec
6076 // parameters; handle those later so we know how much padding we need.
6077 nAltivecParamsAtEnd++;
6078 continue;
6079 }
6080 // Varargs and 64-bit Altivec parameters are padded to 16 byte boundary.
6081 NumBytes = ((NumBytes+15)/16)*16;
6082 }
6083 NumBytes += CalculateStackSlotSize(ArgVT, Flags, PtrByteSize);
6084 }
6085
6086 // Allow for Altivec parameters at the end, if needed.
6087 if (nAltivecParamsAtEnd) {
6088 NumBytes = ((NumBytes+15)/16)*16;
6089 NumBytes += 16*nAltivecParamsAtEnd;
6090 }
6091
6092 // The prolog code of the callee may store up to 8 GPR argument registers to
6093 // the stack, allowing va_start to index over them in memory if its varargs.
6094 // Because we cannot tell if this is needed on the caller side, we have to
6095 // conservatively assume that it is needed. As such, make sure we have at
6096 // least enough stack space for the caller to store the 8 GPRs.
6097 NumBytes = std::max(NumBytes, LinkageSize + 8 * PtrByteSize);
6098
6099 // Tail call needs the stack to be aligned.
6100 if (getTargetMachine().Options.GuaranteedTailCallOpt &&
6101 CallConv == CallingConv::Fast)
6102 NumBytes = EnsureStackAlignment(Subtarget.getFrameLowering(), NumBytes);
6103
6104 // Calculate by how many bytes the stack has to be adjusted in case of tail
6105 // call optimization.
6106 int SPDiff = CalculateTailCallSPDiff(DAG, isTailCall, NumBytes);
6107
6108 // To protect arguments on the stack from being clobbered in a tail call,
6109 // force all the loads to happen before doing any other lowering.
6110 if (isTailCall)
6111 Chain = DAG.getStackArgumentTokenFactor(Chain);
6112
6113 // Adjust the stack pointer for the new arguments...
6114 // These operations are automatically eliminated by the prolog/epilog pass
6115 Chain = DAG.getCALLSEQ_START(Chain, NumBytes, 0, dl);
6116 SDValue CallSeqStart = Chain;
6117
6118 // Load the return address and frame pointer so it can be move somewhere else
6119 // later.
6120 SDValue LROp, FPOp;
6121 Chain = EmitTailCallLoadFPAndRetAddr(DAG, SPDiff, Chain, LROp, FPOp, dl);
6122
6123 // Set up a copy of the stack pointer for use loading and storing any
6124 // arguments that may not fit in the registers available for argument
6125 // passing.
6126 SDValue StackPtr;
6127 if (isPPC64)
6128 StackPtr = DAG.getRegister(PPC::X1, MVT::i64);
6129 else
6130 StackPtr = DAG.getRegister(PPC::R1, MVT::i32);
6131
6132 // Figure out which arguments are going to go in registers, and which in
6133 // memory. Also, if this is a vararg function, floating point operations
6134 // must be stored to our stack, and loaded into integer regs as well, if
6135 // any integer regs are available for argument passing.
6136 unsigned ArgOffset = LinkageSize;
6137 unsigned GPR_idx = 0, FPR_idx = 0, VR_idx = 0;
6138
6139 static const MCPhysReg GPR_32[] = { // 32-bit registers.
6140 PPC::R3, PPC::R4, PPC::R5, PPC::R6,
6141 PPC::R7, PPC::R8, PPC::R9, PPC::R10,
6142 };
6143 static const MCPhysReg GPR_64[] = { // 64-bit registers.
6144 PPC::X3, PPC::X4, PPC::X5, PPC::X6,
6145 PPC::X7, PPC::X8, PPC::X9, PPC::X10,
6146 };
6147 static const MCPhysReg VR[] = {
6148 PPC::V2, PPC::V3, PPC::V4, PPC::V5, PPC::V6, PPC::V7, PPC::V8,
6149 PPC::V9, PPC::V10, PPC::V11, PPC::V12, PPC::V13
6150 };
6151 const unsigned NumGPRs = array_lengthof(GPR_32);
6152 const unsigned NumFPRs = 13;
6153 const unsigned NumVRs = array_lengthof(VR);
6154
6155 const MCPhysReg *GPR = isPPC64 ? GPR_64 : GPR_32;
6156
6157 SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
6158 SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
6159
6160 SmallVector<SDValue, 8> MemOpChains;
6161 for (unsigned i = 0; i != NumOps; ++i) {
6162 SDValue Arg = OutVals[i];
6163 ISD::ArgFlagsTy Flags = Outs[i].Flags;
6164
6165 // PtrOff will be used to store the current argument to the stack if a
6166 // register cannot be found for it.
6167 SDValue PtrOff;
6168
6169 PtrOff = DAG.getConstant(ArgOffset, dl, StackPtr.getValueType());
6170
6171 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
6172
6173 // On PPC64, promote integers to 64-bit values.
6174 if (isPPC64 && Arg.getValueType() == MVT::i32) {
6175 // FIXME: Should this use ANY_EXTEND if neither sext nor zext?
6176 unsigned ExtOp = Flags.isSExt() ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND;
6177 Arg = DAG.getNode(ExtOp, dl, MVT::i64, Arg);
6178 }
6179
6180 // FIXME memcpy is used way more than necessary. Correctness first.
6181 // Note: "by value" is code for passing a structure by value, not
6182 // basic types.
6183 if (Flags.isByVal()) {
6184 unsigned Size = Flags.getByValSize();
6185 // Very small objects are passed right-justified. Everything else is
6186 // passed left-justified.
6187 if (Size==1 || Size==2) {
6188 EVT VT = (Size==1) ? MVT::i8 : MVT::i16;
6189 if (GPR_idx != NumGPRs) {
6190 SDValue Load = DAG.getExtLoad(ISD::EXTLOAD, dl, PtrVT, Chain, Arg,
6191 MachinePointerInfo(), VT);
6192 MemOpChains.push_back(Load.getValue(1));
6193 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
6194
6195 ArgOffset += PtrByteSize;
6196 } else {
6197 SDValue Const = DAG.getConstant(PtrByteSize - Size, dl,
6198 PtrOff.getValueType());
6199 SDValue AddPtr = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, Const);
6200 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, AddPtr,
6201 CallSeqStart,
6202 Flags, DAG, dl);
6203 ArgOffset += PtrByteSize;
6204 }
6205 continue;
6206 }
6207 // Copy entire object into memory. There are cases where gcc-generated
6208 // code assumes it is there, even if it could be put entirely into
6209 // registers. (This is not what the doc says.)
6210 Chain = CallSeqStart = createMemcpyOutsideCallSeq(Arg, PtrOff,
6211 CallSeqStart,
6212 Flags, DAG, dl);
6213
6214 // For small aggregates (Darwin only) and aggregates >= PtrByteSize,
6215 // copy the pieces of the object that fit into registers from the
6216 // parameter save area.
6217 for (unsigned j=0; j<Size; j+=PtrByteSize) {
6218 SDValue Const = DAG.getConstant(j, dl, PtrOff.getValueType());
6219 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
6220 if (GPR_idx != NumGPRs) {
6221 SDValue Load =
6222 DAG.getLoad(PtrVT, dl, Chain, AddArg, MachinePointerInfo());
6223 MemOpChains.push_back(Load.getValue(1));
6224 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
6225 ArgOffset += PtrByteSize;
6226 } else {
6227 ArgOffset += ((Size - j + PtrByteSize-1)/PtrByteSize)*PtrByteSize;
6228 break;
6229 }
6230 }
6231 continue;
6232 }
6233
6234 switch (Arg.getSimpleValueType().SimpleTy) {
6235 default: llvm_unreachable("Unexpected ValueType for argument!")::llvm::llvm_unreachable_internal("Unexpected ValueType for argument!"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6235)
;
6236 case MVT::i1:
6237 case MVT::i32:
6238 case MVT::i64:
6239 if (GPR_idx != NumGPRs) {
6240 if (Arg.getValueType() == MVT::i1)
6241 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, PtrVT, Arg);
6242
6243 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Arg));
6244 } else {
6245 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
6246 isPPC64, isTailCall, false, MemOpChains,
6247 TailCallArguments, dl);
6248 }
6249 ArgOffset += PtrByteSize;
6250 break;
6251 case MVT::f32:
6252 case MVT::f64:
6253 if (FPR_idx != NumFPRs) {
6254 RegsToPass.push_back(std::make_pair(FPR[FPR_idx++], Arg));
6255
6256 if (isVarArg) {
6257 SDValue Store =
6258 DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo());
6259 MemOpChains.push_back(Store);
6260
6261 // Float varargs are always shadowed in available integer registers
6262 if (GPR_idx != NumGPRs) {
6263 SDValue Load =
6264 DAG.getLoad(PtrVT, dl, Store, PtrOff, MachinePointerInfo());
6265 MemOpChains.push_back(Load.getValue(1));
6266 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
6267 }
6268 if (GPR_idx != NumGPRs && Arg.getValueType() == MVT::f64 && !isPPC64){
6269 SDValue ConstFour = DAG.getConstant(4, dl, PtrOff.getValueType());
6270 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff, ConstFour);
6271 SDValue Load =
6272 DAG.getLoad(PtrVT, dl, Store, PtrOff, MachinePointerInfo());
6273 MemOpChains.push_back(Load.getValue(1));
6274 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
6275 }
6276 } else {
6277 // If we have any FPRs remaining, we may also have GPRs remaining.
6278 // Args passed in FPRs consume either 1 (f32) or 2 (f64) available
6279 // GPRs.
6280 if (GPR_idx != NumGPRs)
6281 ++GPR_idx;
6282 if (GPR_idx != NumGPRs && Arg.getValueType() == MVT::f64 &&
6283 !isPPC64) // PPC64 has 64-bit GPR's obviously :)
6284 ++GPR_idx;
6285 }
6286 } else
6287 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
6288 isPPC64, isTailCall, false, MemOpChains,
6289 TailCallArguments, dl);
6290 if (isPPC64)
6291 ArgOffset += 8;
6292 else
6293 ArgOffset += Arg.getValueType() == MVT::f32 ? 4 : 8;
6294 break;
6295 case MVT::v4f32:
6296 case MVT::v4i32:
6297 case MVT::v8i16:
6298 case MVT::v16i8:
6299 if (isVarArg) {
6300 // These go aligned on the stack, or in the corresponding R registers
6301 // when within range. The Darwin PPC ABI doc claims they also go in
6302 // V registers; in fact gcc does this only for arguments that are
6303 // prototyped, not for those that match the ... We do it for all
6304 // arguments, seems to work.
6305 while (ArgOffset % 16 !=0) {
6306 ArgOffset += PtrByteSize;
6307 if (GPR_idx != NumGPRs)
6308 GPR_idx++;
6309 }
6310 // We could elide this store in the case where the object fits
6311 // entirely in R registers. Maybe later.
6312 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr,
6313 DAG.getConstant(ArgOffset, dl, PtrVT));
6314 SDValue Store =
6315 DAG.getStore(Chain, dl, Arg, PtrOff, MachinePointerInfo());
6316 MemOpChains.push_back(Store);
6317 if (VR_idx != NumVRs) {
6318 SDValue Load =
6319 DAG.getLoad(MVT::v4f32, dl, Store, PtrOff, MachinePointerInfo());
6320 MemOpChains.push_back(Load.getValue(1));
6321 RegsToPass.push_back(std::make_pair(VR[VR_idx++], Load));
6322 }
6323 ArgOffset += 16;
6324 for (unsigned i=0; i<16; i+=PtrByteSize) {
6325 if (GPR_idx == NumGPRs)
6326 break;
6327 SDValue Ix = DAG.getNode(ISD::ADD, dl, PtrVT, PtrOff,
6328 DAG.getConstant(i, dl, PtrVT));
6329 SDValue Load =
6330 DAG.getLoad(PtrVT, dl, Store, Ix, MachinePointerInfo());
6331 MemOpChains.push_back(Load.getValue(1));
6332 RegsToPass.push_back(std::make_pair(GPR[GPR_idx++], Load));
6333 }
6334 break;
6335 }
6336
6337 // Non-varargs Altivec params generally go in registers, but have
6338 // stack space allocated at the end.
6339 if (VR_idx != NumVRs) {
6340 // Doesn't have GPR space allocated.
6341 RegsToPass.push_back(std::make_pair(VR[VR_idx++], Arg));
6342 } else if (nAltivecParamsAtEnd==0) {
6343 // We are emitting Altivec params in order.
6344 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
6345 isPPC64, isTailCall, true, MemOpChains,
6346 TailCallArguments, dl);
6347 ArgOffset += 16;
6348 }
6349 break;
6350 }
6351 }
6352 // If all Altivec parameters fit in registers, as they usually do,
6353 // they get stack space following the non-Altivec parameters. We
6354 // don't track this here because nobody below needs it.
6355 // If there are more Altivec parameters than fit in registers emit
6356 // the stores here.
6357 if (!isVarArg && nAltivecParamsAtEnd > NumVRs) {
6358 unsigned j = 0;
6359 // Offset is aligned; skip 1st 12 params which go in V registers.
6360 ArgOffset = ((ArgOffset+15)/16)*16;
6361 ArgOffset += 12*16;
6362 for (unsigned i = 0; i != NumOps; ++i) {
6363 SDValue Arg = OutVals[i];
6364 EVT ArgType = Outs[i].VT;
6365 if (ArgType==MVT::v4f32 || ArgType==MVT::v4i32 ||
6366 ArgType==MVT::v8i16 || ArgType==MVT::v16i8) {
6367 if (++j > NumVRs) {
6368 SDValue PtrOff;
6369 // We are emitting Altivec params in order.
6370 LowerMemOpCallTo(DAG, MF, Chain, Arg, PtrOff, SPDiff, ArgOffset,
6371 isPPC64, isTailCall, true, MemOpChains,
6372 TailCallArguments, dl);
6373 ArgOffset += 16;
6374 }
6375 }
6376 }
6377 }
6378
6379 if (!MemOpChains.empty())
6380 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, MemOpChains);
6381
6382 // On Darwin, R12 must contain the address of an indirect callee. This does
6383 // not mean the MTCTR instruction must use R12; it's easier to model this as
6384 // an extra parameter, so do that.
6385 if (!isTailCall &&
6386 !isFunctionGlobalAddress(Callee) &&
6387 !isa<ExternalSymbolSDNode>(Callee) &&
6388 !isBLACompatibleAddress(Callee, DAG))
6389 RegsToPass.push_back(std::make_pair((unsigned)(isPPC64 ? PPC::X12 :
6390 PPC::R12), Callee));
6391
6392 // Build a sequence of copy-to-reg nodes chained together with token chain
6393 // and flag operands which copy the outgoing args into the appropriate regs.
6394 SDValue InFlag;
6395 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
6396 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
6397 RegsToPass[i].second, InFlag);
6398 InFlag = Chain.getValue(1);
6399 }
6400
6401 if (isTailCall)
6402 PrepareTailCall(DAG, InFlag, Chain, dl, SPDiff, NumBytes, LROp, FPOp,
6403 TailCallArguments);
6404
6405 return FinishCall(CallConv, dl, isTailCall, isVarArg, isPatchPoint,
6406 /* unused except on PPC64 ELFv1 */ false, DAG,
6407 RegsToPass, InFlag, Chain, CallSeqStart, Callee, SPDiff,
6408 NumBytes, Ins, InVals, CS);
6409}
6410
6411bool
6412PPCTargetLowering::CanLowerReturn(CallingConv::ID CallConv,
6413 MachineFunction &MF, bool isVarArg,
6414 const SmallVectorImpl<ISD::OutputArg> &Outs,
6415 LLVMContext &Context) const {
6416 SmallVector<CCValAssign, 16> RVLocs;
6417 CCState CCInfo(CallConv, isVarArg, MF, RVLocs, Context);
6418 return CCInfo.CheckReturn(Outs, RetCC_PPC);
6419}
6420
6421SDValue
6422PPCTargetLowering::LowerReturn(SDValue Chain, CallingConv::ID CallConv,
6423 bool isVarArg,
6424 const SmallVectorImpl<ISD::OutputArg> &Outs,
6425 const SmallVectorImpl<SDValue> &OutVals,
6426 const SDLoc &dl, SelectionDAG &DAG) const {
6427 SmallVector<CCValAssign, 16> RVLocs;
6428 CCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(), RVLocs,
6429 *DAG.getContext());
6430 CCInfo.AnalyzeReturn(Outs, RetCC_PPC);
6431
6432 SDValue Flag;
6433 SmallVector<SDValue, 4> RetOps(1, Chain);
6434
6435 // Copy the result values into the output registers.
6436 for (unsigned i = 0; i != RVLocs.size(); ++i) {
6437 CCValAssign &VA = RVLocs[i];
6438 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-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6438, __extension__ __PRETTY_FUNCTION__))
;
6439
6440 SDValue Arg = OutVals[i];
6441
6442 switch (VA.getLocInfo()) {
6443 default: llvm_unreachable("Unknown loc info!")::llvm::llvm_unreachable_internal("Unknown loc info!", "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6443)
;
6444 case CCValAssign::Full: break;
6445 case CCValAssign::AExt:
6446 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
6447 break;
6448 case CCValAssign::ZExt:
6449 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
6450 break;
6451 case CCValAssign::SExt:
6452 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
6453 break;
6454 }
6455
6456 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
6457 Flag = Chain.getValue(1);
6458 RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
6459 }
6460
6461 const PPCRegisterInfo *TRI = Subtarget.getRegisterInfo();
6462 const MCPhysReg *I =
6463 TRI->getCalleeSavedRegsViaCopy(&DAG.getMachineFunction());
6464 if (I) {
6465 for (; *I; ++I) {
6466
6467 if (PPC::G8RCRegClass.contains(*I))
6468 RetOps.push_back(DAG.getRegister(*I, MVT::i64));
6469 else if (PPC::F8RCRegClass.contains(*I))
6470 RetOps.push_back(DAG.getRegister(*I, MVT::getFloatingPointVT(64)));
6471 else if (PPC::CRRCRegClass.contains(*I))
6472 RetOps.push_back(DAG.getRegister(*I, MVT::i1));
6473 else if (PPC::VRRCRegClass.contains(*I))
6474 RetOps.push_back(DAG.getRegister(*I, MVT::Other));
6475 else
6476 llvm_unreachable("Unexpected register class in CSRsViaCopy!")::llvm::llvm_unreachable_internal("Unexpected register class in CSRsViaCopy!"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6476)
;
6477 }
6478 }
6479
6480 RetOps[0] = Chain; // Update chain.
6481
6482 // Add the flag if we have it.
6483 if (Flag.getNode())
6484 RetOps.push_back(Flag);
6485
6486 return DAG.getNode(PPCISD::RET_FLAG, dl, MVT::Other, RetOps);
6487}
6488
6489SDValue
6490PPCTargetLowering::LowerGET_DYNAMIC_AREA_OFFSET(SDValue Op,
6491 SelectionDAG &DAG) const {
6492 SDLoc dl(Op);
6493
6494 // Get the correct type for integers.
6495 EVT IntVT = Op.getValueType();
6496
6497 // Get the inputs.
6498 SDValue Chain = Op.getOperand(0);
6499 SDValue FPSIdx = getFramePointerFrameIndex(DAG);
6500 // Build a DYNAREAOFFSET node.
6501 SDValue Ops[2] = {Chain, FPSIdx};
6502 SDVTList VTs = DAG.getVTList(IntVT);
6503 return DAG.getNode(PPCISD::DYNAREAOFFSET, dl, VTs, Ops);
6504}
6505
6506SDValue PPCTargetLowering::LowerSTACKRESTORE(SDValue Op,
6507 SelectionDAG &DAG) const {
6508 // When we pop the dynamic allocation we need to restore the SP link.
6509 SDLoc dl(Op);
6510
6511 // Get the correct type for pointers.
6512 EVT PtrVT = getPointerTy(DAG.getDataLayout());
6513
6514 // Construct the stack pointer operand.
6515 bool isPPC64 = Subtarget.isPPC64();
6516 unsigned SP = isPPC64 ? PPC::X1 : PPC::R1;
6517 SDValue StackPtr = DAG.getRegister(SP, PtrVT);
6518
6519 // Get the operands for the STACKRESTORE.
6520 SDValue Chain = Op.getOperand(0);
6521 SDValue SaveSP = Op.getOperand(1);
6522
6523 // Load the old link SP.
6524 SDValue LoadLinkSP =
6525 DAG.getLoad(PtrVT, dl, Chain, StackPtr, MachinePointerInfo());
6526
6527 // Restore the stack pointer.
6528 Chain = DAG.getCopyToReg(LoadLinkSP.getValue(1), dl, SP, SaveSP);
6529
6530 // Store the old link SP.
6531 return DAG.getStore(Chain, dl, LoadLinkSP, StackPtr, MachinePointerInfo());
6532}
6533
6534SDValue PPCTargetLowering::getReturnAddrFrameIndex(SelectionDAG &DAG) const {
6535 MachineFunction &MF = DAG.getMachineFunction();
6536 bool isPPC64 = Subtarget.isPPC64();
6537 EVT PtrVT = getPointerTy(MF.getDataLayout());
6538
6539 // Get current frame pointer save index. The users of this index will be
6540 // primarily DYNALLOC instructions.
6541 PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
6542 int RASI = FI->getReturnAddrSaveIndex();
6543
6544 // If the frame pointer save index hasn't been defined yet.
6545 if (!RASI) {
6546 // Find out what the fix offset of the frame pointer save area.
6547 int LROffset = Subtarget.getFrameLowering()->getReturnSaveOffset();
6548 // Allocate the frame index for frame pointer save area.
6549 RASI = MF.getFrameInfo().CreateFixedObject(isPPC64? 8 : 4, LROffset, false);
6550 // Save the result.
6551 FI->setReturnAddrSaveIndex(RASI);
6552 }
6553 return DAG.getFrameIndex(RASI, PtrVT);
6554}
6555
6556SDValue
6557PPCTargetLowering::getFramePointerFrameIndex(SelectionDAG & DAG) const {
6558 MachineFunction &MF = DAG.getMachineFunction();
6559 bool isPPC64 = Subtarget.isPPC64();
6560 EVT PtrVT = getPointerTy(MF.getDataLayout());
6561
6562 // Get current frame pointer save index. The users of this index will be
6563 // primarily DYNALLOC instructions.
6564 PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>();
6565 int FPSI = FI->getFramePointerSaveIndex();
6566
6567 // If the frame pointer save index hasn't been defined yet.
6568 if (!FPSI) {
6569 // Find out what the fix offset of the frame pointer save area.
6570 int FPOffset = Subtarget.getFrameLowering()->getFramePointerSaveOffset();
6571 // Allocate the frame index for frame pointer save area.
6572 FPSI = MF.getFrameInfo().CreateFixedObject(isPPC64? 8 : 4, FPOffset, true);
6573 // Save the result.
6574 FI->setFramePointerSaveIndex(FPSI);
6575 }
6576 return DAG.getFrameIndex(FPSI, PtrVT);
6577}
6578
6579SDValue PPCTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
6580 SelectionDAG &DAG) const {
6581 // Get the inputs.
6582 SDValue Chain = Op.getOperand(0);
6583 SDValue Size = Op.getOperand(1);
6584 SDLoc dl(Op);
6585
6586 // Get the correct type for pointers.
6587 EVT PtrVT = getPointerTy(DAG.getDataLayout());
6588 // Negate the size.
6589 SDValue NegSize = DAG.getNode(ISD::SUB, dl, PtrVT,
6590 DAG.getConstant(0, dl, PtrVT), Size);
6591 // Construct a node for the frame pointer save index.
6592 SDValue FPSIdx = getFramePointerFrameIndex(DAG);
6593 // Build a DYNALLOC node.
6594 SDValue Ops[3] = { Chain, NegSize, FPSIdx };
6595 SDVTList VTs = DAG.getVTList(PtrVT, MVT::Other);
6596 return DAG.getNode(PPCISD::DYNALLOC, dl, VTs, Ops);
6597}
6598
6599SDValue PPCTargetLowering::LowerEH_DWARF_CFA(SDValue Op,
6600 SelectionDAG &DAG) const {
6601 MachineFunction &MF = DAG.getMachineFunction();
6602
6603 bool isPPC64 = Subtarget.isPPC64();
6604 EVT PtrVT = getPointerTy(DAG.getDataLayout());
6605
6606 int FI = MF.getFrameInfo().CreateFixedObject(isPPC64 ? 8 : 4, 0, false);
6607 return DAG.getFrameIndex(FI, PtrVT);
6608}
6609
6610SDValue PPCTargetLowering::lowerEH_SJLJ_SETJMP(SDValue Op,
6611 SelectionDAG &DAG) const {
6612 SDLoc DL(Op);
6613 return DAG.getNode(PPCISD::EH_SJLJ_SETJMP, DL,
6614 DAG.getVTList(MVT::i32, MVT::Other),
6615 Op.getOperand(0), Op.getOperand(1));
6616}
6617
6618SDValue PPCTargetLowering::lowerEH_SJLJ_LONGJMP(SDValue Op,
6619 SelectionDAG &DAG) const {
6620 SDLoc DL(Op);
6621 return DAG.getNode(PPCISD::EH_SJLJ_LONGJMP, DL, MVT::Other,
6622 Op.getOperand(0), Op.getOperand(1));
6623}
6624
6625SDValue PPCTargetLowering::LowerLOAD(SDValue Op, SelectionDAG &DAG) const {
6626 if (Op.getValueType().isVector())
6627 return LowerVectorLoad(Op, DAG);
6628
6629 assert(Op.getValueType() == MVT::i1 &&(static_cast <bool> (Op.getValueType() == MVT::i1 &&
"Custom lowering only for i1 loads") ? void (0) : __assert_fail
("Op.getValueType() == MVT::i1 && \"Custom lowering only for i1 loads\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6630, __extension__ __PRETTY_FUNCTION__))
6630 "Custom lowering only for i1 loads")(static_cast <bool> (Op.getValueType() == MVT::i1 &&
"Custom lowering only for i1 loads") ? void (0) : __assert_fail
("Op.getValueType() == MVT::i1 && \"Custom lowering only for i1 loads\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6630, __extension__ __PRETTY_FUNCTION__))
;
6631
6632 // First, load 8 bits into 32 bits, then truncate to 1 bit.
6633
6634 SDLoc dl(Op);
6635 LoadSDNode *LD = cast<LoadSDNode>(Op);
6636
6637 SDValue Chain = LD->getChain();
6638 SDValue BasePtr = LD->getBasePtr();
6639 MachineMemOperand *MMO = LD->getMemOperand();
6640
6641 SDValue NewLD =
6642 DAG.getExtLoad(ISD::EXTLOAD, dl, getPointerTy(DAG.getDataLayout()), Chain,
6643 BasePtr, MVT::i8, MMO);
6644 SDValue Result = DAG.getNode(ISD::TRUNCATE, dl, MVT::i1, NewLD);
6645
6646 SDValue Ops[] = { Result, SDValue(NewLD.getNode(), 1) };
6647 return DAG.getMergeValues(Ops, dl);
6648}
6649
6650SDValue PPCTargetLowering::LowerSTORE(SDValue Op, SelectionDAG &DAG) const {
6651 if (Op.getOperand(1).getValueType().isVector())
6652 return LowerVectorStore(Op, DAG);
6653
6654 assert(Op.getOperand(1).getValueType() == MVT::i1 &&(static_cast <bool> (Op.getOperand(1).getValueType() ==
MVT::i1 && "Custom lowering only for i1 stores") ? void
(0) : __assert_fail ("Op.getOperand(1).getValueType() == MVT::i1 && \"Custom lowering only for i1 stores\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6655, __extension__ __PRETTY_FUNCTION__))
6655 "Custom lowering only for i1 stores")(static_cast <bool> (Op.getOperand(1).getValueType() ==
MVT::i1 && "Custom lowering only for i1 stores") ? void
(0) : __assert_fail ("Op.getOperand(1).getValueType() == MVT::i1 && \"Custom lowering only for i1 stores\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6655, __extension__ __PRETTY_FUNCTION__))
;
6656
6657 // First, zero extend to 32 bits, then use a truncating store to 8 bits.
6658
6659 SDLoc dl(Op);
6660 StoreSDNode *ST = cast<StoreSDNode>(Op);
6661
6662 SDValue Chain = ST->getChain();
6663 SDValue BasePtr = ST->getBasePtr();
6664 SDValue Value = ST->getValue();
6665 MachineMemOperand *MMO = ST->getMemOperand();
6666
6667 Value = DAG.getNode(ISD::ZERO_EXTEND, dl, getPointerTy(DAG.getDataLayout()),
6668 Value);
6669 return DAG.getTruncStore(Chain, dl, Value, BasePtr, MVT::i8, MMO);
6670}
6671
6672// FIXME: Remove this once the ANDI glue bug is fixed:
6673SDValue PPCTargetLowering::LowerTRUNCATE(SDValue Op, SelectionDAG &DAG) const {
6674 assert(Op.getValueType() == MVT::i1 &&(static_cast <bool> (Op.getValueType() == MVT::i1 &&
"Custom lowering only for i1 results") ? void (0) : __assert_fail
("Op.getValueType() == MVT::i1 && \"Custom lowering only for i1 results\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6675, __extension__ __PRETTY_FUNCTION__))
6675 "Custom lowering only for i1 results")(static_cast <bool> (Op.getValueType() == MVT::i1 &&
"Custom lowering only for i1 results") ? void (0) : __assert_fail
("Op.getValueType() == MVT::i1 && \"Custom lowering only for i1 results\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6675, __extension__ __PRETTY_FUNCTION__))
;
6676
6677 SDLoc DL(Op);
6678 return DAG.getNode(PPCISD::ANDIo_1_GT_BIT, DL, MVT::i1,
6679 Op.getOperand(0));
6680}
6681
6682/// LowerSELECT_CC - Lower floating point select_cc's into fsel instruction when
6683/// possible.
6684SDValue PPCTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
6685 // Not FP? Not a fsel.
6686 if (!Op.getOperand(0).getValueType().isFloatingPoint() ||
6687 !Op.getOperand(2).getValueType().isFloatingPoint())
6688 return Op;
6689
6690 // We might be able to do better than this under some circumstances, but in
6691 // general, fsel-based lowering of select is a finite-math-only optimization.
6692 // For more information, see section F.3 of the 2.06 ISA specification.
6693 if (!DAG.getTarget().Options.NoInfsFPMath ||
6694 !DAG.getTarget().Options.NoNaNsFPMath)
6695 return Op;
6696 // TODO: Propagate flags from the select rather than global settings.
6697 SDNodeFlags Flags;
6698 Flags.setNoInfs(true);
6699 Flags.setNoNaNs(true);
6700
6701 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
6702
6703 EVT ResVT = Op.getValueType();
6704 EVT CmpVT = Op.getOperand(0).getValueType();
6705 SDValue LHS = Op.getOperand(0), RHS = Op.getOperand(1);
6706 SDValue TV = Op.getOperand(2), FV = Op.getOperand(3);
6707 SDLoc dl(Op);
6708
6709 // If the RHS of the comparison is a 0.0, we don't need to do the
6710 // subtraction at all.
6711 SDValue Sel1;
6712 if (isFloatingPointZero(RHS))
6713 switch (CC) {
6714 default: break; // SETUO etc aren't handled by fsel.
6715 case ISD::SETNE:
6716 std::swap(TV, FV);
6717 LLVM_FALLTHROUGH[[clang::fallthrough]];
6718 case ISD::SETEQ:
6719 if (LHS.getValueType() == MVT::f32) // Comparison is always 64-bits
6720 LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
6721 Sel1 = DAG.getNode(PPCISD::FSEL, dl, ResVT, LHS, TV, FV);
6722 if (Sel1.getValueType() == MVT::f32) // Comparison is always 64-bits
6723 Sel1 = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Sel1);
6724 return DAG.getNode(PPCISD::FSEL, dl, ResVT,
6725 DAG.getNode(ISD::FNEG, dl, MVT::f64, LHS), Sel1, FV);
6726 case ISD::SETULT:
6727 case ISD::SETLT:
6728 std::swap(TV, FV); // fsel is natively setge, swap operands for setlt
6729 LLVM_FALLTHROUGH[[clang::fallthrough]];
6730 case ISD::SETOGE:
6731 case ISD::SETGE:
6732 if (LHS.getValueType() == MVT::f32) // Comparison is always 64-bits
6733 LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
6734 return DAG.getNode(PPCISD::FSEL, dl, ResVT, LHS, TV, FV);
6735 case ISD::SETUGT:
6736 case ISD::SETGT:
6737 std::swap(TV, FV); // fsel is natively setge, swap operands for setlt
6738 LLVM_FALLTHROUGH[[clang::fallthrough]];
6739 case ISD::SETOLE:
6740 case ISD::SETLE:
6741 if (LHS.getValueType() == MVT::f32) // Comparison is always 64-bits
6742 LHS = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, LHS);
6743 return DAG.getNode(PPCISD::FSEL, dl, ResVT,
6744 DAG.getNode(ISD::FNEG, dl, MVT::f64, LHS), TV, FV);
6745 }
6746
6747 SDValue Cmp;
6748 switch (CC) {
6749 default: break; // SETUO etc aren't handled by fsel.
6750 case ISD::SETNE:
6751 std::swap(TV, FV);
6752 LLVM_FALLTHROUGH[[clang::fallthrough]];
6753 case ISD::SETEQ:
6754 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS, Flags);
6755 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
6756 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
6757 Sel1 = DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
6758 if (Sel1.getValueType() == MVT::f32) // Comparison is always 64-bits
6759 Sel1 = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Sel1);
6760 return DAG.getNode(PPCISD::FSEL, dl, ResVT,
6761 DAG.getNode(ISD::FNEG, dl, MVT::f64, Cmp), Sel1, FV);
6762 case ISD::SETULT:
6763 case ISD::SETLT:
6764 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS, Flags);
6765 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
6766 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
6767 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, FV, TV);
6768 case ISD::SETOGE:
6769 case ISD::SETGE:
6770 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, LHS, RHS, Flags);
6771 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
6772 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
6773 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
6774 case ISD::SETUGT:
6775 case ISD::SETGT:
6776 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, RHS, LHS, Flags);
6777 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
6778 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
6779 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, FV, TV);
6780 case ISD::SETOLE:
6781 case ISD::SETLE:
6782 Cmp = DAG.getNode(ISD::FSUB, dl, CmpVT, RHS, LHS, Flags);
6783 if (Cmp.getValueType() == MVT::f32) // Comparison is always 64-bits
6784 Cmp = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Cmp);
6785 return DAG.getNode(PPCISD::FSEL, dl, ResVT, Cmp, TV, FV);
6786 }
6787 return Op;
6788}
6789
6790void PPCTargetLowering::LowerFP_TO_INTForReuse(SDValue Op, ReuseLoadInfo &RLI,
6791 SelectionDAG &DAG,
6792 const SDLoc &dl) const {
6793 assert(Op.getOperand(0).getValueType().isFloatingPoint())(static_cast <bool> (Op.getOperand(0).getValueType().isFloatingPoint
()) ? void (0) : __assert_fail ("Op.getOperand(0).getValueType().isFloatingPoint()"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6793, __extension__ __PRETTY_FUNCTION__))
;
6794 SDValue Src = Op.getOperand(0);
6795 if (Src.getValueType() == MVT::f32)
6796 Src = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Src);
6797
6798 SDValue Tmp;
6799 switch (Op.getSimpleValueType().SimpleTy) {
6800 default: llvm_unreachable("Unhandled FP_TO_INT type in custom expander!")::llvm::llvm_unreachable_internal("Unhandled FP_TO_INT type in custom expander!"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6800)
;
6801 case MVT::i32:
6802 Tmp = DAG.getNode(
6803 Op.getOpcode() == ISD::FP_TO_SINT
6804 ? PPCISD::FCTIWZ
6805 : (Subtarget.hasFPCVT() ? PPCISD::FCTIWUZ : PPCISD::FCTIDZ),
6806 dl, MVT::f64, Src);
6807 break;
6808 case MVT::i64:
6809 assert((Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT()) &&(static_cast <bool> ((Op.getOpcode() == ISD::FP_TO_SINT
|| Subtarget.hasFPCVT()) && "i64 FP_TO_UINT is supported only with FPCVT"
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT()) && \"i64 FP_TO_UINT is supported only with FPCVT\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6810, __extension__ __PRETTY_FUNCTION__))
6810 "i64 FP_TO_UINT is supported only with FPCVT")(static_cast <bool> ((Op.getOpcode() == ISD::FP_TO_SINT
|| Subtarget.hasFPCVT()) && "i64 FP_TO_UINT is supported only with FPCVT"
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT()) && \"i64 FP_TO_UINT is supported only with FPCVT\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6810, __extension__ __PRETTY_FUNCTION__))
;
6811 Tmp = DAG.getNode(Op.getOpcode()==ISD::FP_TO_SINT ? PPCISD::FCTIDZ :
6812 PPCISD::FCTIDUZ,
6813 dl, MVT::f64, Src);
6814 break;
6815 }
6816
6817 // Convert the FP value to an int value through memory.
6818 bool i32Stack = Op.getValueType() == MVT::i32 && Subtarget.hasSTFIWX() &&
6819 (Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT());
6820 SDValue FIPtr = DAG.CreateStackTemporary(i32Stack ? MVT::i32 : MVT::f64);
6821 int FI = cast<FrameIndexSDNode>(FIPtr)->getIndex();
6822 MachinePointerInfo MPI =
6823 MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FI);
6824
6825 // Emit a store to the stack slot.
6826 SDValue Chain;
6827 if (i32Stack) {
6828 MachineFunction &MF = DAG.getMachineFunction();
6829 MachineMemOperand *MMO =
6830 MF.getMachineMemOperand(MPI, MachineMemOperand::MOStore, 4, 4);
6831 SDValue Ops[] = { DAG.getEntryNode(), Tmp, FIPtr };
6832 Chain = DAG.getMemIntrinsicNode(PPCISD::STFIWX, dl,
6833 DAG.getVTList(MVT::Other), Ops, MVT::i32, MMO);
6834 } else
6835 Chain = DAG.getStore(DAG.getEntryNode(), dl, Tmp, FIPtr, MPI);
6836
6837 // Result is a load from the stack slot. If loading 4 bytes, make sure to
6838 // add in a bias on big endian.
6839 if (Op.getValueType() == MVT::i32 && !i32Stack) {
6840 FIPtr = DAG.getNode(ISD::ADD, dl, FIPtr.getValueType(), FIPtr,
6841 DAG.getConstant(4, dl, FIPtr.getValueType()));
6842 MPI = MPI.getWithOffset(Subtarget.isLittleEndian() ? 0 : 4);
6843 }
6844
6845 RLI.Chain = Chain;
6846 RLI.Ptr = FIPtr;
6847 RLI.MPI = MPI;
6848}
6849
6850/// \brief Custom lowers floating point to integer conversions to use
6851/// the direct move instructions available in ISA 2.07 to avoid the
6852/// need for load/store combinations.
6853SDValue PPCTargetLowering::LowerFP_TO_INTDirectMove(SDValue Op,
6854 SelectionDAG &DAG,
6855 const SDLoc &dl) const {
6856 assert(Op.getOperand(0).getValueType().isFloatingPoint())(static_cast <bool> (Op.getOperand(0).getValueType().isFloatingPoint
()) ? void (0) : __assert_fail ("Op.getOperand(0).getValueType().isFloatingPoint()"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6856, __extension__ __PRETTY_FUNCTION__))
;
6857 SDValue Src = Op.getOperand(0);
6858
6859 if (Src.getValueType() == MVT::f32)
6860 Src = DAG.getNode(ISD::FP_EXTEND, dl, MVT::f64, Src);
6861
6862 SDValue Tmp;
6863 switch (Op.getSimpleValueType().SimpleTy) {
6864 default: llvm_unreachable("Unhandled FP_TO_INT type in custom expander!")::llvm::llvm_unreachable_internal("Unhandled FP_TO_INT type in custom expander!"
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6864)
;
6865 case MVT::i32:
6866 Tmp = DAG.getNode(
6867 Op.getOpcode() == ISD::FP_TO_SINT
6868 ? PPCISD::FCTIWZ
6869 : (Subtarget.hasFPCVT() ? PPCISD::FCTIWUZ : PPCISD::FCTIDZ),
6870 dl, MVT::f64, Src);
6871 Tmp = DAG.getNode(PPCISD::MFVSR, dl, MVT::i32, Tmp);
6872 break;
6873 case MVT::i64:
6874 assert((Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT()) &&(static_cast <bool> ((Op.getOpcode() == ISD::FP_TO_SINT
|| Subtarget.hasFPCVT()) && "i64 FP_TO_UINT is supported only with FPCVT"
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT()) && \"i64 FP_TO_UINT is supported only with FPCVT\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6875, __extension__ __PRETTY_FUNCTION__))
6875 "i64 FP_TO_UINT is supported only with FPCVT")(static_cast <bool> ((Op.getOpcode() == ISD::FP_TO_SINT
|| Subtarget.hasFPCVT()) && "i64 FP_TO_UINT is supported only with FPCVT"
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::FP_TO_SINT || Subtarget.hasFPCVT()) && \"i64 FP_TO_UINT is supported only with FPCVT\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6875, __extension__ __PRETTY_FUNCTION__))
;
6876 Tmp = DAG.getNode(Op.getOpcode()==ISD::FP_TO_SINT ? PPCISD::FCTIDZ :
6877 PPCISD::FCTIDUZ,
6878 dl, MVT::f64, Src);
6879 Tmp = DAG.getNode(PPCISD::MFVSR, dl, MVT::i64, Tmp);
6880 break;
6881 }
6882 return Tmp;
6883}
6884
6885SDValue PPCTargetLowering::LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG,
6886 const SDLoc &dl) const {
6887 if (Subtarget.hasDirectMove() && Subtarget.isPPC64())
6888 return LowerFP_TO_INTDirectMove(Op, DAG, dl);
6889
6890 ReuseLoadInfo RLI;
6891 LowerFP_TO_INTForReuse(Op, RLI, DAG, dl);
6892
6893 return DAG.getLoad(Op.getValueType(), dl, RLI.Chain, RLI.Ptr, RLI.MPI,
6894 RLI.Alignment, RLI.MMOFlags(), RLI.AAInfo, RLI.Ranges);
6895}
6896
6897// We're trying to insert a regular store, S, and then a load, L. If the
6898// incoming value, O, is a load, we might just be able to have our load use the
6899// address used by O. However, we don't know if anything else will store to
6900// that address before we can load from it. To prevent this situation, we need
6901// to insert our load, L, into the chain as a peer of O. To do this, we give L
6902// the same chain operand as O, we create a token factor from the chain results
6903// of O and L, and we replace all uses of O's chain result with that token
6904// factor (see spliceIntoChain below for this last part).
6905bool PPCTargetLowering::canReuseLoadAddress(SDValue Op, EVT MemVT,
6906 ReuseLoadInfo &RLI,
6907 SelectionDAG &DAG,
6908 ISD::LoadExtType ET) const {
6909 SDLoc dl(Op);
6910 if (ET == ISD::NON_EXTLOAD &&
6911 (Op.getOpcode() == ISD::FP_TO_UINT ||
6912 Op.getOpcode() == ISD::FP_TO_SINT) &&
6913 isOperationLegalOrCustom(Op.getOpcode(),
6914 Op.getOperand(0).getValueType())) {
6915
6916 LowerFP_TO_INTForReuse(Op, RLI, DAG, dl);
6917 return true;
6918 }
6919
6920 LoadSDNode *LD = dyn_cast<LoadSDNode>(Op);
6921 if (!LD || LD->getExtensionType() != ET || LD->isVolatile() ||
6922 LD->isNonTemporal())
6923 return false;
6924 if (LD->getMemoryVT() != MemVT)
6925 return false;
6926
6927 RLI.Ptr = LD->getBasePtr();
6928 if (LD->isIndexed() && !LD->getOffset().isUndef()) {
6929 assert(LD->getAddressingMode() == ISD::PRE_INC &&(static_cast <bool> (LD->getAddressingMode() == ISD::
PRE_INC && "Non-pre-inc AM on PPC?") ? void (0) : __assert_fail
("LD->getAddressingMode() == ISD::PRE_INC && \"Non-pre-inc AM on PPC?\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6930, __extension__ __PRETTY_FUNCTION__))
6930 "Non-pre-inc AM on PPC?")(static_cast <bool> (LD->getAddressingMode() == ISD::
PRE_INC && "Non-pre-inc AM on PPC?") ? void (0) : __assert_fail
("LD->getAddressingMode() == ISD::PRE_INC && \"Non-pre-inc AM on PPC?\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6930, __extension__ __PRETTY_FUNCTION__))
;
6931 RLI.Ptr = DAG.getNode(ISD::ADD, dl, RLI.Ptr.getValueType(), RLI.Ptr,
6932 LD->getOffset());
6933 }
6934
6935 RLI.Chain = LD->getChain();
6936 RLI.MPI = LD->getPointerInfo();
6937 RLI.IsDereferenceable = LD->isDereferenceable();
6938 RLI.IsInvariant = LD->isInvariant();
6939 RLI.Alignment = LD->getAlignment();
6940 RLI.AAInfo = LD->getAAInfo();
6941 RLI.Ranges = LD->getRanges();
6942
6943 RLI.ResChain = SDValue(LD, LD->isIndexed() ? 2 : 1);
6944 return true;
6945}
6946
6947// Given the head of the old chain, ResChain, insert a token factor containing
6948// it and NewResChain, and make users of ResChain now be users of that token
6949// factor.
6950// TODO: Remove and use DAG::makeEquivalentMemoryOrdering() instead.
6951void PPCTargetLowering::spliceIntoChain(SDValue ResChain,
6952 SDValue NewResChain,
6953 SelectionDAG &DAG) const {
6954 if (!ResChain)
6955 return;
6956
6957 SDLoc dl(NewResChain);
6958
6959 SDValue TF = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
6960 NewResChain, DAG.getUNDEF(MVT::Other));
6961 assert(TF.getNode() != NewResChain.getNode() &&(static_cast <bool> (TF.getNode() != NewResChain.getNode
() && "A new TF really is required here") ? void (0) :
__assert_fail ("TF.getNode() != NewResChain.getNode() && \"A new TF really is required here\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6962, __extension__ __PRETTY_FUNCTION__))
6962 "A new TF really is required here")(static_cast <bool> (TF.getNode() != NewResChain.getNode
() && "A new TF really is required here") ? void (0) :
__assert_fail ("TF.getNode() != NewResChain.getNode() && \"A new TF really is required here\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 6962, __extension__ __PRETTY_FUNCTION__))
;
6963
6964 DAG.ReplaceAllUsesOfValueWith(ResChain, TF);
6965 DAG.UpdateNodeOperands(TF.getNode(), ResChain, NewResChain);
6966}
6967
6968/// \brief Analyze profitability of direct move
6969/// prefer float load to int load plus direct move
6970/// when there is no integer use of int load
6971bool PPCTargetLowering::directMoveIsProfitable(const SDValue &Op) const {
6972 SDNode *Origin = Op.getOperand(0).getNode();
6973 if (Origin->getOpcode() != ISD::LOAD)
6974 return true;
6975
6976 // If there is no LXSIBZX/LXSIHZX, like Power8,
6977 // prefer direct move if the memory size is 1 or 2 bytes.
6978 MachineMemOperand *MMO = cast<LoadSDNode>(Origin)->getMemOperand();
6979 if (!Subtarget.hasP9Vector() && MMO->getSize() <= 2)
6980 return true;
6981
6982 for (SDNode::use_iterator UI = Origin->use_begin(),
6983 UE = Origin->use_end();
6984 UI != UE; ++UI) {
6985
6986 // Only look at the users of the loaded value.
6987 if (UI.getUse().get().getResNo() != 0)
6988 continue;
6989
6990 if (UI->getOpcode() != ISD::SINT_TO_FP &&
6991 UI->getOpcode() != ISD::UINT_TO_FP)
6992 return true;
6993 }
6994
6995 return false;
6996}
6997
6998/// \brief Custom lowers integer to floating point conversions to use
6999/// the direct move instructions available in ISA 2.07 to avoid the
7000/// need for load/store combinations.
7001SDValue PPCTargetLowering::LowerINT_TO_FPDirectMove(SDValue Op,
7002 SelectionDAG &DAG,
7003 const SDLoc &dl) const {
7004 assert((Op.getValueType() == MVT::f32 ||(static_cast <bool> ((Op.getValueType() == MVT::f32 || Op
.getValueType() == MVT::f64) && "Invalid floating point type as target of conversion"
) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) && \"Invalid floating point type as target of conversion\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7006, __extension__ __PRETTY_FUNCTION__))
7005 Op.getValueType() == MVT::f64) &&(static_cast <bool> ((Op.getValueType() == MVT::f32 || Op
.getValueType() == MVT::f64) && "Invalid floating point type as target of conversion"
) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) && \"Invalid floating point type as target of conversion\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7006, __extension__ __PRETTY_FUNCTION__))
7006 "Invalid floating point type as target of conversion")(static_cast <bool> ((Op.getValueType() == MVT::f32 || Op
.getValueType() == MVT::f64) && "Invalid floating point type as target of conversion"
) ? void (0) : __assert_fail ("(Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::f64) && \"Invalid floating point type as target of conversion\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7006, __extension__ __PRETTY_FUNCTION__))
;
7007 assert(Subtarget.hasFPCVT() &&(static_cast <bool> (Subtarget.hasFPCVT() && "Int to FP conversions with direct moves require FPCVT"
) ? void (0) : __assert_fail ("Subtarget.hasFPCVT() && \"Int to FP conversions with direct moves require FPCVT\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7008, __extension__ __PRETTY_FUNCTION__))
7008 "Int to FP conversions with direct moves require FPCVT")(static_cast <bool> (Subtarget.hasFPCVT() && "Int to FP conversions with direct moves require FPCVT"
) ? void (0) : __assert_fail ("Subtarget.hasFPCVT() && \"Int to FP conversions with direct moves require FPCVT\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7008, __extension__ __PRETTY_FUNCTION__))
;
7009 SDValue FP;
7010 SDValue Src = Op.getOperand(0);
7011 bool SinglePrec = Op.getValueType() == MVT::f32;
7012 bool WordInt = Src.getSimpleValueType().SimpleTy == MVT::i32;
7013 bool Signed = Op.getOpcode() == ISD::SINT_TO_FP;
7014 unsigned ConvOp = Signed ? (SinglePrec ? PPCISD::FCFIDS : PPCISD::FCFID) :
7015 (SinglePrec ? PPCISD::FCFIDUS : PPCISD::FCFIDU);
7016
7017 if (WordInt) {
7018 FP = DAG.getNode(Signed ? PPCISD::MTVSRA : PPCISD::MTVSRZ,
7019 dl, MVT::f64, Src);
7020 FP = DAG.getNode(ConvOp, dl, SinglePrec ? MVT::f32 : MVT::f64, FP);
7021 }
7022 else {
7023 FP = DAG.getNode(PPCISD::MTVSRA, dl, MVT::f64, Src);
7024 FP = DAG.getNode(ConvOp, dl, SinglePrec ? MVT::f32 : MVT::f64, FP);
7025 }
7026
7027 return FP;
7028}
7029
7030SDValue PPCTargetLowering::LowerINT_TO_FP(SDValue Op,
7031 SelectionDAG &DAG) const {
7032 SDLoc dl(Op);
7033
7034 if (Subtarget.hasQPX() && Op.getOperand(0).getValueType() == MVT::v4i1) {
7035 if (Op.getValueType() != MVT::v4f32 && Op.getValueType() != MVT::v4f64)
7036 return SDValue();
7037
7038 SDValue Value = Op.getOperand(0);
7039 // The values are now known to be -1 (false) or 1 (true). To convert this
7040 // into 0 (false) and 1 (true), add 1 and then divide by 2 (multiply by 0.5).
7041 // This can be done with an fma and the 0.5 constant: (V+1.0)*0.5 = 0.5*V+0.5
7042 Value = DAG.getNode(PPCISD::QBFLT, dl, MVT::v4f64, Value);
7043
7044 SDValue FPHalfs = DAG.getConstantFP(0.5, dl, MVT::v4f64);
7045
7046 Value = DAG.getNode(ISD::FMA, dl, MVT::v4f64, Value, FPHalfs, FPHalfs);
7047
7048 if (Op.getValueType() != MVT::v4f64)
7049 Value = DAG.getNode(ISD::FP_ROUND, dl,
7050 Op.getValueType(), Value,
7051 DAG.getIntPtrConstant(1, dl));
7052 return Value;
7053 }
7054
7055 // Don't handle ppc_fp128 here; let it be lowered to a libcall.
7056 if (Op.getValueType() != MVT::f32 && Op.getValueType() != MVT::f64)
7057 return SDValue();
7058
7059 if (Op.getOperand(0).getValueType() == MVT::i1)
7060 return DAG.getNode(ISD::SELECT, dl, Op.getValueType(), Op.getOperand(0),
7061 DAG.getConstantFP(1.0, dl, Op.getValueType()),
7062 DAG.getConstantFP(0.0, dl, Op.getValueType()));
7063
7064 // If we have direct moves, we can do all the conversion, skip the store/load
7065 // however, without FPCVT we can't do most conversions.
7066 if (Subtarget.hasDirectMove() && directMoveIsProfitable(Op) &&
7067 Subtarget.isPPC64() && Subtarget.hasFPCVT())
7068 return LowerINT_TO_FPDirectMove(Op, DAG, dl);
7069
7070 assert((Op.getOpcode() == ISD::SINT_TO_FP || Subtarget.hasFPCVT()) &&(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP
|| Subtarget.hasFPCVT()) && "UINT_TO_FP is supported only with FPCVT"
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Subtarget.hasFPCVT()) && \"UINT_TO_FP is supported only with FPCVT\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7071, __extension__ __PRETTY_FUNCTION__))
7071 "UINT_TO_FP is supported only with FPCVT")(static_cast <bool> ((Op.getOpcode() == ISD::SINT_TO_FP
|| Subtarget.hasFPCVT()) && "UINT_TO_FP is supported only with FPCVT"
) ? void (0) : __assert_fail ("(Op.getOpcode() == ISD::SINT_TO_FP || Subtarget.hasFPCVT()) && \"UINT_TO_FP is supported only with FPCVT\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7071, __extension__ __PRETTY_FUNCTION__))
;
7072
7073 // If we have FCFIDS, then use it when converting to single-precision.
7074 // Otherwise, convert to double-precision and then round.
7075 unsigned FCFOp = (Subtarget.hasFPCVT() && Op.getValueType() == MVT::f32)
7076 ? (Op.getOpcode() == ISD::UINT_TO_FP ? PPCISD::FCFIDUS
7077 : PPCISD::FCFIDS)
7078 : (Op.getOpcode() == ISD::UINT_TO_FP ? PPCISD::FCFIDU
7079 : PPCISD::FCFID);
7080 MVT FCFTy = (Subtarget.hasFPCVT() && Op.getValueType() == MVT::f32)
7081 ? MVT::f32
7082 : MVT::f64;
7083
7084 if (Op.getOperand(0).getValueType() == MVT::i64) {
7085 SDValue SINT = Op.getOperand(0);
7086 // When converting to single-precision, we actually need to convert
7087 // to double-precision first and then round to single-precision.
7088 // To avoid double-rounding effects during that operation, we have
7089 // to prepare the input operand. Bits that might be truncated when
7090 // converting to double-precision are replaced by a bit that won't
7091 // be lost at this stage, but is below the single-precision rounding
7092 // position.
7093 //
7094 // However, if -enable-unsafe-fp-math is in effect, accept double
7095 // rounding to avoid the extra overhead.
7096 if (Op.getValueType() == MVT::f32 &&
7097 !Subtarget.hasFPCVT() &&
7098 !DAG.getTarget().Options.UnsafeFPMath) {
7099
7100 // Twiddle input to make sure the low 11 bits are zero. (If this
7101 // is the case, we are guaranteed the value will fit into the 53 bit
7102 // mantissa of an IEEE double-precision value without rounding.)
7103 // If any of those low 11 bits were not zero originally, make sure
7104 // bit 12 (value 2048) is set instead, so that the final rounding
7105 // to single-precision gets the correct result.
7106 SDValue Round = DAG.getNode(ISD::AND, dl, MVT::i64,
7107 SINT, DAG.getConstant(2047, dl, MVT::i64));
7108 Round = DAG.getNode(ISD::ADD, dl, MVT::i64,
7109 Round, DAG.getConstant(2047, dl, MVT::i64));
7110 Round = DAG.getNode(ISD::OR, dl, MVT::i64, Round, SINT);
7111 Round = DAG.getNode(ISD::AND, dl, MVT::i64,
7112 Round, DAG.getConstant(-2048, dl, MVT::i64));
7113
7114 // However, we cannot use that value unconditionally: if the magnitude
7115 // of the input value is small, the bit-twiddling we did above might
7116 // end up visibly changing the output. Fortunately, in that case, we
7117 // don't need to twiddle bits since the original input will convert
7118 // exactly to double-precision floating-point already. Therefore,
7119 // construct a conditional to use the original value if the top 11
7120 // bits are all sign-bit copies, and use the rounded value computed
7121 // above otherwise.
7122 SDValue Cond = DAG.getNode(ISD::SRA, dl, MVT::i64,
7123 SINT, DAG.getConstant(53, dl, MVT::i32));
7124 Cond = DAG.getNode(ISD::ADD, dl, MVT::i64,
7125 Cond, DAG.getConstant(1, dl, MVT::i64));
7126 Cond = DAG.getSetCC(dl, MVT::i32,
7127 Cond, DAG.getConstant(1, dl, MVT::i64), ISD::SETUGT);
7128
7129 SINT = DAG.getNode(ISD::SELECT, dl, MVT::i64, Cond, Round, SINT);
7130 }
7131
7132 ReuseLoadInfo RLI;
7133 SDValue Bits;
7134
7135 MachineFunction &MF = DAG.getMachineFunction();
7136 if (canReuseLoadAddress(SINT, MVT::i64, RLI, DAG)) {
7137 Bits = DAG.getLoad(MVT::f64, dl, RLI.Chain, RLI.Ptr, RLI.MPI,
7138 RLI.Alignment, RLI.MMOFlags(), RLI.AAInfo, RLI.Ranges);
7139 spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
7140 } else if (Subtarget.hasLFIWAX() &&
7141 canReuseLoadAddress(SINT, MVT::i32, RLI, DAG, ISD::SEXTLOAD)) {
7142 MachineMemOperand *MMO =
7143 MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
7144 RLI.Alignment, RLI.AAInfo, RLI.Ranges);
7145 SDValue Ops[] = { RLI.Chain, RLI.Ptr };
7146 Bits = DAG.getMemIntrinsicNode(PPCISD::LFIWAX, dl,
7147 DAG.getVTList(MVT::f64, MVT::Other),
7148 Ops, MVT::i32, MMO);
7149 spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
7150 } else if (Subtarget.hasFPCVT() &&
7151 canReuseLoadAddress(SINT, MVT::i32, RLI, DAG, ISD::ZEXTLOAD)) {
7152 MachineMemOperand *MMO =
7153 MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
7154 RLI.Alignment, RLI.AAInfo, RLI.Ranges);
7155 SDValue Ops[] = { RLI.Chain, RLI.Ptr };
7156 Bits = DAG.getMemIntrinsicNode(PPCISD::LFIWZX, dl,
7157 DAG.getVTList(MVT::f64, MVT::Other),
7158 Ops, MVT::i32, MMO);
7159 spliceIntoChain(RLI.ResChain, Bits.getValue(1), DAG);
7160 } else if (((Subtarget.hasLFIWAX() &&
7161 SINT.getOpcode() == ISD::SIGN_EXTEND) ||
7162 (Subtarget.hasFPCVT() &&
7163 SINT.getOpcode() == ISD::ZERO_EXTEND)) &&
7164 SINT.getOperand(0).getValueType() == MVT::i32) {
7165 MachineFrameInfo &MFI = MF.getFrameInfo();
7166 EVT PtrVT = getPointerTy(DAG.getDataLayout());
7167
7168 int FrameIdx = MFI.CreateStackObject(4, 4, false);
7169 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
7170
7171 SDValue Store =
7172 DAG.getStore(DAG.getEntryNode(), dl, SINT.getOperand(0), FIdx,
7173 MachinePointerInfo::getFixedStack(
7174 DAG.getMachineFunction(), FrameIdx));
7175
7176 assert(cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 &&(static_cast <bool> (cast<StoreSDNode>(Store)->
getMemoryVT() == MVT::i32 && "Expected an i32 store")
? void (0) : __assert_fail ("cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 && \"Expected an i32 store\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7177, __extension__ __PRETTY_FUNCTION__))
7177 "Expected an i32 store")(static_cast <bool> (cast<StoreSDNode>(Store)->
getMemoryVT() == MVT::i32 && "Expected an i32 store")
? void (0) : __assert_fail ("cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 && \"Expected an i32 store\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7177, __extension__ __PRETTY_FUNCTION__))
;
7178
7179 RLI.Ptr = FIdx;
7180 RLI.Chain = Store;
7181 RLI.MPI =
7182 MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx);
7183 RLI.Alignment = 4;
7184
7185 MachineMemOperand *MMO =
7186 MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
7187 RLI.Alignment, RLI.AAInfo, RLI.Ranges);
7188 SDValue Ops[] = { RLI.Chain, RLI.Ptr };
7189 Bits = DAG.getMemIntrinsicNode(SINT.getOpcode() == ISD::ZERO_EXTEND ?
7190 PPCISD::LFIWZX : PPCISD::LFIWAX,
7191 dl, DAG.getVTList(MVT::f64, MVT::Other),
7192 Ops, MVT::i32, MMO);
7193 } else
7194 Bits = DAG.getNode(ISD::BITCAST, dl, MVT::f64, SINT);
7195
7196 SDValue FP = DAG.getNode(FCFOp, dl, FCFTy, Bits);
7197
7198 if (Op.getValueType() == MVT::f32 && !Subtarget.hasFPCVT())
7199 FP = DAG.getNode(ISD::FP_ROUND, dl,
7200 MVT::f32, FP, DAG.getIntPtrConstant(0, dl));
7201 return FP;
7202 }
7203
7204 assert(Op.getOperand(0).getValueType() == MVT::i32 &&(static_cast <bool> (Op.getOperand(0).getValueType() ==
MVT::i32 && "Unhandled INT_TO_FP type in custom expander!"
) ? void (0) : __assert_fail ("Op.getOperand(0).getValueType() == MVT::i32 && \"Unhandled INT_TO_FP type in custom expander!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7205, __extension__ __PRETTY_FUNCTION__))
7205 "Unhandled INT_TO_FP type in custom expander!")(static_cast <bool> (Op.getOperand(0).getValueType() ==
MVT::i32 && "Unhandled INT_TO_FP type in custom expander!"
) ? void (0) : __assert_fail ("Op.getOperand(0).getValueType() == MVT::i32 && \"Unhandled INT_TO_FP type in custom expander!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7205, __extension__ __PRETTY_FUNCTION__))
;
7206 // Since we only generate this in 64-bit mode, we can take advantage of
7207 // 64-bit registers. In particular, sign extend the input value into the
7208 // 64-bit register with extsw, store the WHOLE 64-bit value into the stack
7209 // then lfd it and fcfid it.
7210 MachineFunction &MF = DAG.getMachineFunction();
7211 MachineFrameInfo &MFI = MF.getFrameInfo();
7212 EVT PtrVT = getPointerTy(MF.getDataLayout());
7213
7214 SDValue Ld;
7215 if (Subtarget.hasLFIWAX() || Subtarget.hasFPCVT()) {
7216 ReuseLoadInfo RLI;
7217 bool ReusingLoad;
7218 if (!(ReusingLoad = canReuseLoadAddress(Op.getOperand(0), MVT::i32, RLI,
7219 DAG))) {
7220 int FrameIdx = MFI.CreateStackObject(4, 4, false);
7221 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
7222
7223 SDValue Store =
7224 DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0), FIdx,
7225 MachinePointerInfo::getFixedStack(
7226 DAG.getMachineFunction(), FrameIdx));
7227
7228 assert(cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 &&(static_cast <bool> (cast<StoreSDNode>(Store)->
getMemoryVT() == MVT::i32 && "Expected an i32 store")
? void (0) : __assert_fail ("cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 && \"Expected an i32 store\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7229, __extension__ __PRETTY_FUNCTION__))
7229 "Expected an i32 store")(static_cast <bool> (cast<StoreSDNode>(Store)->
getMemoryVT() == MVT::i32 && "Expected an i32 store")
? void (0) : __assert_fail ("cast<StoreSDNode>(Store)->getMemoryVT() == MVT::i32 && \"Expected an i32 store\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7229, __extension__ __PRETTY_FUNCTION__))
;
7230
7231 RLI.Ptr = FIdx;
7232 RLI.Chain = Store;
7233 RLI.MPI =
7234 MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx);
7235 RLI.Alignment = 4;
7236 }
7237
7238 MachineMemOperand *MMO =
7239 MF.getMachineMemOperand(RLI.MPI, MachineMemOperand::MOLoad, 4,
7240 RLI.Alignment, RLI.AAInfo, RLI.Ranges);
7241 SDValue Ops[] = { RLI.Chain, RLI.Ptr };
7242 Ld = DAG.getMemIntrinsicNode(Op.getOpcode() == ISD::UINT_TO_FP ?
7243 PPCISD::LFIWZX : PPCISD::LFIWAX,
7244 dl, DAG.getVTList(MVT::f64, MVT::Other),
7245 Ops, MVT::i32, MMO);
7246 if (ReusingLoad)
7247 spliceIntoChain(RLI.ResChain, Ld.getValue(1), DAG);
7248 } else {
7249 assert(Subtarget.isPPC64() &&(static_cast <bool> (Subtarget.isPPC64() && "i32->FP without LFIWAX supported only on PPC64"
) ? void (0) : __assert_fail ("Subtarget.isPPC64() && \"i32->FP without LFIWAX supported only on PPC64\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7250, __extension__ __PRETTY_FUNCTION__))
7250 "i32->FP without LFIWAX supported only on PPC64")(static_cast <bool> (Subtarget.isPPC64() && "i32->FP without LFIWAX supported only on PPC64"
) ? void (0) : __assert_fail ("Subtarget.isPPC64() && \"i32->FP without LFIWAX supported only on PPC64\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7250, __extension__ __PRETTY_FUNCTION__))
;
7251
7252 int FrameIdx = MFI.CreateStackObject(8, 8, false);
7253 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
7254
7255 SDValue Ext64 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i64,
7256 Op.getOperand(0));
7257
7258 // STD the extended value into the stack slot.
7259 SDValue Store = DAG.getStore(
7260 DAG.getEntryNode(), dl, Ext64, FIdx,
7261 MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx));
7262
7263 // Load the value as a double.
7264 Ld = DAG.getLoad(
7265 MVT::f64, dl, Store, FIdx,
7266 MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx));
7267 }
7268
7269 // FCFID it and return it.
7270 SDValue FP = DAG.getNode(FCFOp, dl, FCFTy, Ld);
7271 if (Op.getValueType() == MVT::f32 && !Subtarget.hasFPCVT())
7272 FP = DAG.getNode(ISD::FP_ROUND, dl, MVT::f32, FP,
7273 DAG.getIntPtrConstant(0, dl));
7274 return FP;
7275}
7276
7277SDValue PPCTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
7278 SelectionDAG &DAG) const {
7279 SDLoc dl(Op);
7280 /*
7281 The rounding mode is in bits 30:31 of FPSR, and has the following
7282 settings:
7283 00 Round to nearest
7284 01 Round to 0
7285 10 Round to +inf
7286 11 Round to -inf
7287
7288 FLT_ROUNDS, on the other hand, expects the following:
7289 -1 Undefined
7290 0 Round to 0
7291 1 Round to nearest
7292 2 Round to +inf
7293 3 Round to -inf
7294
7295 To perform the conversion, we do:
7296 ((FPSCR & 0x3) ^ ((~FPSCR & 0x3) >> 1))
7297 */
7298
7299 MachineFunction &MF = DAG.getMachineFunction();
7300 EVT VT = Op.getValueType();
7301 EVT PtrVT = getPointerTy(MF.getDataLayout());
7302
7303 // Save FP Control Word to register
7304 EVT NodeTys[] = {
7305 MVT::f64, // return register
7306 MVT::Glue // unused in this context
7307 };
7308 SDValue Chain = DAG.getNode(PPCISD::MFFS, dl, NodeTys, None);
7309
7310 // Save FP register to stack slot
7311 int SSFI = MF.getFrameInfo().CreateStackObject(8, 8, false);
7312 SDValue StackSlot = DAG.getFrameIndex(SSFI, PtrVT);
7313 SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Chain, StackSlot,
7314 MachinePointerInfo());
7315
7316 // Load FP Control Word from low 32 bits of stack slot.
7317 SDValue Four = DAG.getConstant(4, dl, PtrVT);
7318 SDValue Addr = DAG.getNode(ISD::ADD, dl, PtrVT, StackSlot, Four);
7319 SDValue CWD = DAG.getLoad(MVT::i32, dl, Store, Addr, MachinePointerInfo());
7320
7321 // Transform as necessary
7322 SDValue CWD1 =
7323 DAG.getNode(ISD::AND, dl, MVT::i32,
7324 CWD, DAG.getConstant(3, dl, MVT::i32));
7325 SDValue CWD2 =
7326 DAG.getNode(ISD::SRL, dl, MVT::i32,
7327 DAG.getNode(ISD::AND, dl, MVT::i32,
7328 DAG.getNode(ISD::XOR, dl, MVT::i32,
7329 CWD, DAG.getConstant(3, dl, MVT::i32)),
7330 DAG.getConstant(3, dl, MVT::i32)),
7331 DAG.getConstant(1, dl, MVT::i32));
7332
7333 SDValue RetVal =
7334 DAG.getNode(ISD::XOR, dl, MVT::i32, CWD1, CWD2);
7335
7336 return DAG.getNode((VT.getSizeInBits() < 16 ?
7337 ISD::TRUNCATE : ISD::ZERO_EXTEND), dl, VT, RetVal);
7338}
7339
7340SDValue PPCTargetLowering::LowerSHL_PARTS(SDValue Op, SelectionDAG &DAG) const {
7341 EVT VT = Op.getValueType();
7342 unsigned BitWidth = VT.getSizeInBits();
7343 SDLoc dl(Op);
7344 assert(Op.getNumOperands() == 3 &&(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SHL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SHL!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7346, __extension__ __PRETTY_FUNCTION__))
7345 VT == Op.getOperand(1).getValueType() &&(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SHL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SHL!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7346, __extension__ __PRETTY_FUNCTION__))
7346 "Unexpected SHL!")(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SHL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SHL!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7346, __extension__ __PRETTY_FUNCTION__))
;
7347
7348 // Expand into a bunch of logical ops. Note that these ops
7349 // depend on the PPC behavior for oversized shift amounts.
7350 SDValue Lo = Op.getOperand(0);
7351 SDValue Hi = Op.getOperand(1);
7352 SDValue Amt = Op.getOperand(2);
7353 EVT AmtVT = Amt.getValueType();
7354
7355 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
7356 DAG.getConstant(BitWidth, dl, AmtVT), Amt);
7357 SDValue Tmp2 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Amt);
7358 SDValue Tmp3 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Tmp1);
7359 SDValue Tmp4 = DAG.getNode(ISD::OR , dl, VT, Tmp2, Tmp3);
7360 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
7361 DAG.getConstant(-BitWidth, dl, AmtVT));
7362 SDValue Tmp6 = DAG.getNode(PPCISD::SHL, dl, VT, Lo, Tmp5);
7363 SDValue OutHi = DAG.getNode(ISD::OR, dl, VT, Tmp4, Tmp6);
7364 SDValue OutLo = DAG.getNode(PPCISD::SHL, dl, VT, Lo, Amt);
7365 SDValue OutOps[] = { OutLo, OutHi };
7366 return DAG.getMergeValues(OutOps, dl);
7367}
7368
7369SDValue PPCTargetLowering::LowerSRL_PARTS(SDValue Op, SelectionDAG &DAG) const {
7370 EVT VT = Op.getValueType();
7371 SDLoc dl(Op);
7372 unsigned BitWidth = VT.getSizeInBits();
7373 assert(Op.getNumOperands() == 3 &&(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SRL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRL!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7375, __extension__ __PRETTY_FUNCTION__))
7374 VT == Op.getOperand(1).getValueType() &&(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SRL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRL!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7375, __extension__ __PRETTY_FUNCTION__))
7375 "Unexpected SRL!")(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SRL!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRL!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7375, __extension__ __PRETTY_FUNCTION__))
;
7376
7377 // Expand into a bunch of logical ops. Note that these ops
7378 // depend on the PPC behavior for oversized shift amounts.
7379 SDValue Lo = Op.getOperand(0);
7380 SDValue Hi = Op.getOperand(1);
7381 SDValue Amt = Op.getOperand(2);
7382 EVT AmtVT = Amt.getValueType();
7383
7384 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
7385 DAG.getConstant(BitWidth, dl, AmtVT), Amt);
7386 SDValue Tmp2 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Amt);
7387 SDValue Tmp3 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Tmp1);
7388 SDValue Tmp4 = DAG.getNode(ISD::OR, dl, VT, Tmp2, Tmp3);
7389 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
7390 DAG.getConstant(-BitWidth, dl, AmtVT));
7391 SDValue Tmp6 = DAG.getNode(PPCISD::SRL, dl, VT, Hi, Tmp5);
7392 SDValue OutLo = DAG.getNode(ISD::OR, dl, VT, Tmp4, Tmp6);
7393 SDValue OutHi = DAG.getNode(PPCISD::SRL, dl, VT, Hi, Amt);
7394 SDValue OutOps[] = { OutLo, OutHi };
7395 return DAG.getMergeValues(OutOps, dl);
7396}
7397
7398SDValue PPCTargetLowering::LowerSRA_PARTS(SDValue Op, SelectionDAG &DAG) const {
7399 SDLoc dl(Op);
7400 EVT VT = Op.getValueType();
7401 unsigned BitWidth = VT.getSizeInBits();
7402 assert(Op.getNumOperands() == 3 &&(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SRA!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRA!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7404, __extension__ __PRETTY_FUNCTION__))
7403 VT == Op.getOperand(1).getValueType() &&(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SRA!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRA!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7404, __extension__ __PRETTY_FUNCTION__))
7404 "Unexpected SRA!")(static_cast <bool> (Op.getNumOperands() == 3 &&
VT == Op.getOperand(1).getValueType() && "Unexpected SRA!"
) ? void (0) : __assert_fail ("Op.getNumOperands() == 3 && VT == Op.getOperand(1).getValueType() && \"Unexpected SRA!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7404, __extension__ __PRETTY_FUNCTION__))
;
7405
7406 // Expand into a bunch of logical ops, followed by a select_cc.
7407 SDValue Lo = Op.getOperand(0);
7408 SDValue Hi = Op.getOperand(1);
7409 SDValue Amt = Op.getOperand(2);
7410 EVT AmtVT = Amt.getValueType();
7411
7412 SDValue Tmp1 = DAG.getNode(ISD::SUB, dl, AmtVT,
7413 DAG.getConstant(BitWidth, dl, AmtVT), Amt);
7414 SDValue Tmp2 = DAG.getNode(PPCISD::SRL, dl, VT, Lo, Amt);
7415 SDValue Tmp3 = DAG.getNode(PPCISD::SHL, dl, VT, Hi, Tmp1);
7416 SDValue Tmp4 = DAG.getNode(ISD::OR, dl, VT, Tmp2, Tmp3);
7417 SDValue Tmp5 = DAG.getNode(ISD::ADD, dl, AmtVT, Amt,
7418 DAG.getConstant(-BitWidth, dl, AmtVT));
7419 SDValue Tmp6 = DAG.getNode(PPCISD::SRA, dl, VT, Hi, Tmp5);
7420 SDValue OutHi = DAG.getNode(PPCISD::SRA, dl, VT, Hi, Amt);
7421 SDValue OutLo = DAG.getSelectCC(dl, Tmp5, DAG.getConstant(0, dl, AmtVT),
7422 Tmp4, Tmp6, ISD::SETLE);
7423 SDValue OutOps[] = { OutLo, OutHi };
7424 return DAG.getMergeValues(OutOps, dl);
7425}
7426
7427//===----------------------------------------------------------------------===//
7428// Vector related lowering.
7429//
7430
7431/// BuildSplatI - Build a canonical splati of Val with an element size of
7432/// SplatSize. Cast the result to VT.
7433static SDValue BuildSplatI(int Val, unsigned SplatSize, EVT VT,
7434 SelectionDAG &DAG, const SDLoc &dl) {
7435 assert(Val >= -16 && Val <= 15 && "vsplti is out of range!")(static_cast <bool> (Val >= -16 && Val <=
15 && "vsplti is out of range!") ? void (0) : __assert_fail
("Val >= -16 && Val <= 15 && \"vsplti is out of range!\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7435, __extension__ __PRETTY_FUNCTION__))
;
7436
7437 static const MVT VTys[] = { // canonical VT to use for each size.
7438 MVT::v16i8, MVT::v8i16, MVT::Other, MVT::v4i32
7439 };
7440
7441 EVT ReqVT = VT != MVT::Other ? VT : VTys[SplatSize-1];
7442
7443 // Force vspltis[hw] -1 to vspltisb -1 to canonicalize.
7444 if (Val == -1)
7445 SplatSize = 1;
7446
7447 EVT CanonicalVT = VTys[SplatSize-1];
7448
7449 // Build a canonical splat for this value.
7450 return DAG.getBitcast(ReqVT, DAG.getConstant(Val, dl, CanonicalVT));
7451}
7452
7453/// BuildIntrinsicOp - Return a unary operator intrinsic node with the
7454/// specified intrinsic ID.
7455static SDValue BuildIntrinsicOp(unsigned IID, SDValue Op, SelectionDAG &DAG,
7456 const SDLoc &dl, EVT DestVT = MVT::Other) {
7457 if (DestVT == MVT::Other) DestVT = Op.getValueType();
7458 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
7459 DAG.getConstant(IID, dl, MVT::i32), Op);
7460}
7461
7462/// BuildIntrinsicOp - Return a binary operator intrinsic node with the
7463/// specified intrinsic ID.
7464static SDValue BuildIntrinsicOp(unsigned IID, SDValue LHS, SDValue RHS,
7465 SelectionDAG &DAG, const SDLoc &dl,
7466 EVT DestVT = MVT::Other) {
7467 if (DestVT == MVT::Other) DestVT = LHS.getValueType();
7468 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
7469 DAG.getConstant(IID, dl, MVT::i32), LHS, RHS);
7470}
7471
7472/// BuildIntrinsicOp - Return a ternary operator intrinsic node with the
7473/// specified intrinsic ID.
7474static SDValue BuildIntrinsicOp(unsigned IID, SDValue Op0, SDValue Op1,
7475 SDValue Op2, SelectionDAG &DAG, const SDLoc &dl,
7476 EVT DestVT = MVT::Other) {
7477 if (DestVT == MVT::Other) DestVT = Op0.getValueType();
7478 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, DestVT,
7479 DAG.getConstant(IID, dl, MVT::i32), Op0, Op1, Op2);
7480}
7481
7482/// BuildVSLDOI - Return a VECTOR_SHUFFLE that is a vsldoi of the specified
7483/// amount. The result has the specified value type.
7484static SDValue BuildVSLDOI(SDValue LHS, SDValue RHS, unsigned Amt, EVT VT,
7485 SelectionDAG &DAG, const SDLoc &dl) {
7486 // Force LHS/RHS to be the right type.
7487 LHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, LHS);
7488 RHS = DAG.getNode(ISD::BITCAST, dl, MVT::v16i8, RHS);
7489
7490 int Ops[16];
7491 for (unsigned i = 0; i != 16; ++i)
7492 Ops[i] = i + Amt;
7493 SDValue T = DAG.getVectorShuffle(MVT::v16i8, dl, LHS, RHS, Ops);
7494 return DAG.getNode(ISD::BITCAST, dl, VT, T);
7495}
7496
7497/// Do we have an efficient pattern in a .td file for this node?
7498///
7499/// \param V - pointer to the BuildVectorSDNode being matched
7500/// \param HasDirectMove - does this subtarget have VSR <-> GPR direct moves?
7501///
7502/// There are some patterns where it is beneficial to keep a BUILD_VECTOR
7503/// node as a BUILD_VECTOR node rather than expanding it. The patterns where
7504/// the opposite is true (expansion is beneficial) are:
7505/// - The node builds a vector out of integers that are not 32 or 64-bits
7506/// - The node builds a vector out of constants
7507/// - The node is a "load-and-splat"
7508/// In all other cases, we will choose to keep the BUILD_VECTOR.
7509static bool haveEfficientBuildVectorPattern(BuildVectorSDNode *V,
7510 bool HasDirectMove,
7511 bool HasP8Vector) {
7512 EVT VecVT = V->getValueType(0);
7513 bool RightType = VecVT == MVT::v2f64 ||
7514 (HasP8Vector && VecVT == MVT::v4f32) ||
7515 (HasDirectMove && (VecVT == MVT::v2i64 || VecVT == MVT::v4i32));
7516 if (!RightType)
7517 return false;
7518
7519 bool IsSplat = true;
7520 bool IsLoad = false;
7521 SDValue Op0 = V->getOperand(0);
7522
7523 // This function is called in a block that confirms the node is not a constant
7524 // splat. So a constant BUILD_VECTOR here means the vector is built out of
7525 // different constants.
7526 if (V->isConstant())
7527 return false;
7528 for (int i = 0, e = V->getNumOperands(); i < e; ++i) {
7529 if (V->getOperand(i).isUndef())
7530 return false;
7531 // We want to expand nodes that represent load-and-splat even if the
7532 // loaded value is a floating point truncation or conversion to int.
7533 if (V->getOperand(i).getOpcode() == ISD::LOAD ||
7534 (V->getOperand(i).getOpcode() == ISD::FP_ROUND &&
7535 V->getOperand(i).getOperand(0).getOpcode() == ISD::LOAD) ||
7536 (V->getOperand(i).getOpcode() == ISD::FP_TO_SINT &&
7537 V->getOperand(i).getOperand(0).getOpcode() == ISD::LOAD) ||
7538 (V->getOperand(i).getOpcode() == ISD::FP_TO_UINT &&
7539 V->getOperand(i).getOperand(0).getOpcode() == ISD::LOAD))
7540 IsLoad = true;
7541 // If the operands are different or the input is not a load and has more
7542 // uses than just this BV node, then it isn't a splat.
7543 if (V->getOperand(i) != Op0 ||
7544 (!IsLoad && !V->isOnlyUserOf(V->getOperand(i).getNode())))
7545 IsSplat = false;
7546 }
7547 return !(IsSplat && IsLoad);
7548}
7549
7550// If this is a case we can't handle, return null and let the default
7551// expansion code take care of it. If we CAN select this case, and if it
7552// selects to a single instruction, return Op. Otherwise, if we can codegen
7553// this case more efficiently than a constant pool load, lower it to the
7554// sequence of ops that should be used.
7555SDValue PPCTargetLowering::LowerBUILD_VECTOR(SDValue Op,
7556 SelectionDAG &DAG) const {
7557 SDLoc dl(Op);
7558 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
7559 assert(BVN && "Expected a BuildVectorSDNode in LowerBUILD_VECTOR")(static_cast <bool> (BVN && "Expected a BuildVectorSDNode in LowerBUILD_VECTOR"
) ? void (0) : __assert_fail ("BVN && \"Expected a BuildVectorSDNode in LowerBUILD_VECTOR\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7559, __extension__ __PRETTY_FUNCTION__))
;
7560
7561 if (Subtarget.hasQPX() && Op.getValueType() == MVT::v4i1) {
7562 // We first build an i32 vector, load it into a QPX register,
7563 // then convert it to a floating-point vector and compare it
7564 // to a zero vector to get the boolean result.
7565 MachineFrameInfo &MFI = DAG.getMachineFunction().getFrameInfo();
7566 int FrameIdx = MFI.CreateStackObject(16, 16, false);
7567 MachinePointerInfo PtrInfo =
7568 MachinePointerInfo::getFixedStack(DAG.getMachineFunction(), FrameIdx);
7569 EVT PtrVT = getPointerTy(DAG.getDataLayout());
7570 SDValue FIdx = DAG.getFrameIndex(FrameIdx, PtrVT);
7571
7572 assert(BVN->getNumOperands() == 4 &&(static_cast <bool> (BVN->getNumOperands() == 4 &&
"BUILD_VECTOR for v4i1 does not have 4 operands") ? void (0)
: __assert_fail ("BVN->getNumOperands() == 4 && \"BUILD_VECTOR for v4i1 does not have 4 operands\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7573, __extension__ __PRETTY_FUNCTION__))
7573 "BUILD_VECTOR for v4i1 does not have 4 operands")(static_cast <bool> (BVN->getNumOperands() == 4 &&
"BUILD_VECTOR for v4i1 does not have 4 operands") ? void (0)
: __assert_fail ("BVN->getNumOperands() == 4 && \"BUILD_VECTOR for v4i1 does not have 4 operands\""
, "/build/llvm-toolchain-snapshot-6.0~svn321639/lib/Target/PowerPC/PPCISelLowering.cpp"
, 7573, __extension__ __PRETTY_FUNCTION__))
;
7574
7575 bool IsConst = true;
7576 for (unsigned i = 0; i < 4; ++i) {
7577 if (BVN->getOperand(i).isUndef()) continue;
7578 if (!isa<ConstantSDNode>(BVN->getOperand(i))) {
7579 IsConst = false;
7580 break;
7581 }
7582 }
7583
7584 if (IsConst) {
7585 Constant *One =
7586 ConstantFP::get(Type::getFloatTy(*DAG.getContext()), 1.0);
7587 Constant *NegOne =
7588 ConstantFP::get(Type::getFloatTy(*DAG.getContext()), -1.0);
7589
7590 Constant *CV[4];
7591 for (unsigned i = 0; i < 4; ++i) {
7592 if (BVN->getOperand(i).isUndef())
7593 CV[i] = UndefValue::get(Type::getFloatTy(*DAG.getContext()));
7594 else if (isNullConstant(BVN->getOperand(i)))
7595 CV[i] = NegOne;
7596 else
7597 CV[i] = One;
7598 }
7599
7600 Constant *CP = ConstantVector::get(CV);
7601 SDValue CPIdx = DAG.getConstantPool(CP, getPointerTy(DAG.getDataLayout()),
7602 16 /* alignment */);
7603
7604 SDValue Ops[] = {DAG.getEntryNode(), CPIdx};
7605 SDVTList VTs = DAG.getVTList({MVT::v4i1, /*chain*/ MVT::Other});
7606 return DAG.getMemIntrinsicNode(
7607 PPCISD::QVLFSb, dl, VTs, Ops, MVT::v4f32,
7608 MachinePointerInfo::getConstantPool(DAG.getMachineFunction()));
7609 }
7610
7611 SmallVector<SDValue, 4> Stores;
7612 for (unsigned i = 0; i < 4; ++i) {
7613 if (BVN->getOperand(i).isUndef()) continue;
7614
7615 unsigned Offset = 4*i;
7616 SDValue Idx = DAG.getConstant(Offset, dl, FIdx.getValueType());
7617 Idx = DAG.getNode(ISD::ADD, dl, FIdx.getValueType(), FIdx, Idx);
7618
7619 unsigned StoreSize = BVN->getOperand(i).getValueType().getStoreSize();
7620 if (StoreSize > 4) {
7621 Stores.push_back(
7622 DAG.getTruncStore(DAG.getEntryNode(), dl, BVN->getOperand(i), Idx,
7623 PtrInfo.getWithOffset(Offset), MVT::i32));
7624 } else {
7625 SDValue StoreValue = BVN->getOperand(i);
7626 if (StoreSize < 4)
7627 StoreValue = DAG.getNode(ISD::ANY_EXTEND, dl, MVT::i32, StoreValue);
7628
7629 Stores.push_back(DAG.getStore(DAG.getEntryNode(), dl, StoreValue, Idx,
7630 PtrInfo.getWithOffset(Offset)));
7631 }
7632 }
7633
7634 SDValue StoreChain;
7635 if (!Stores.empty())
7636 StoreChain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other, Stores);
7637 else
7638 StoreChain = DAG.getEntryNode();
7639
7640 // Now load from v4i32 into the QPX register; this will extend it to
7641 // v4i64 but not yet convert it to a floating point. Nevertheless, this
7642 // is typed as v4f64 because the QPX register integer states are not
7643 // explicitly represented.
7644
7645 SDValue Ops[] = {StoreChain,
7646 DAG.getConstant(Intrinsic::ppc_qpx_qvlfiwz, dl, MVT::i32),
7647 FIdx};
7648 SDVTList VTs = DAG.getVTList({MVT::v4f64, /*chain*/ MVT::Other});
7649
7650 SDValue LoadedVect = DAG.getMemIntrinsicNode(ISD::INTRINSIC_W_CHAIN,
7651 dl, VTs, Ops, MVT::v4i32, PtrInfo);
7652 LoadedVect = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f64,
7653 DAG.getConstant(Intrinsic::ppc_qpx_qvfcfidu, dl, MVT::i32),
7654 LoadedVect);
7655
7656 SDValue FPZeros = DAG.getConstantFP(0.0, dl, MVT::v4f64);
7657
7658 return DAG.getSetCC(dl, MVT::v4i1, LoadedVect, FPZeros, ISD::SETEQ);
7659 }
7660
7661 // All other QPX vectors are handled by generic code.
7662 if (Subtarget.hasQPX())
7663 return SDValue();
7664
7665 // Check if this is a splat of a constant value.
7666 APInt APSplatBits, APSplatUndef;
7667 unsigned SplatBitSize;
7668 bool HasAnyUndefs;
7669 if (! BVN->isConstantSplat(APSplatBits, APSplatUndef, SplatBitSize,
7670 HasAnyUndefs, 0, !Subtarget.isLittleEndian()) ||
7671 SplatBitSize > 32) {
7672 // BUILD_VECTOR nodes that are not constant splats of up to 32-bits can be
7673 // lowered to VSX instructions under certain conditions.
7674 // Without VSX, there is no pattern more efficient than expanding the node.
7675 if (Subtarget.hasVSX() &&
7676 haveEfficientBuildVectorPattern(BVN, Subtarget.hasDirectMove(),
7677 Subtarget.hasP8Vector()))
7678 return Op;
7679 return SDValue();
7680 }
7681
7682 unsigned SplatBits = APSplatBits.getZExtValue();
7683 unsigned SplatUndef = APSplatUndef.getZExtValue();
7684 unsigned SplatSize = SplatBitSize / 8;
7685
7686 // First, handle single instruction cases.
7687
7688 // All zeros?
7689 if (SplatBits == 0) {
7690 // Canonicalize all zero vectors to be v4i32.
7691 if (Op.getValueType() != MVT::v4i32 || HasAnyUndefs) {
7692 SDValue Z = DAG.getConstant(0, dl, MVT::v4i32);
7693 Op = DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Z);
7694 }
7695 return Op;
7696 }
7697
7698 // We have XXSPLTIB for constant splats one byte wide
7699 if (Subtarget.hasP9Vector() && SplatSize == 1) {
7700 // This is a splat of 1-byte elements with some elements potentially undef.
7701 // Rather than trying to match undef in the SDAG patterns, ensure that all
7702 // elements are the same constant.
7703 if (HasAnyUndefs || ISD::isBuildVectorAllOnes(BVN)) {
7704 SmallVector<SDValue, 16> Ops(16, DAG.getConstant(SplatBits,
7705 dl, MVT::i32));
7706 SDValue NewBV = DAG.getBuildVector(MVT::v16i8, dl, Ops);
7707 if (Op.getValueType() != MVT::v16i8)
7708 return DAG.getBitcast(Op.getValueType(), NewBV);
7709 return NewBV;
7710 }
7711
7712 // BuildVectorSDNode::isConstantSplat() is actually pretty smart. It'll
7713 // detect that constant splats like v8i16: 0xABAB are really just splats
7714 // of a 1-byte constant. In this case, we need to convert the node to a
7715 // splat of v16i8 and a bitcast.
7716 if (Op.getValueType() != MVT::v16i8)
7717 return DAG.getBitcast(Op.getValueType(),
7718 DAG.getConstant(SplatBits, dl, MVT::v16i8));
7719
7720 return Op;
7721 }
7722
7723 // If the sign extended value is in the range [-16,15], use VSPLTI[bhw].
7724 int32_t SextVal= (int32_t(SplatBits << (32-SplatBitSize)) >>
7725 (32-SplatBitSize));
7726 if (SextVal >= -16 && SextVal <= 15)
7727 return BuildSplatI(SextVal, SplatSize, Op.getValueType(), DAG, dl);
7728
7729 // Two instruction sequences.
7730
7731 // If this value is in the range [-32,30] and is even, use:
7732 // VSPLTI[bhw](val/2) + VSPLTI[bhw](val/2)
7733 // If this value is in the range [17,31] and is odd, use:
7734 // VSPLTI[bhw](val-16) - VSPLTI[bhw](-16)
7735 // If this value is in the range [-31,-17] and is odd, use:
7736 // VSPLTI[bhw](val+16) + VSPLTI[bhw](-16)
7737 // Note the last two are three-instruction sequences.
7738 if (SextVal >= -32 && SextVal <= 31) {
7739 // To avoid having these optimi