LLVM 19.0.0git
MachineFunction.cpp
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1//===- MachineFunction.cpp ------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Collect native machine code information for a function. This allows
10// target-specific information about the generated code to be stored with each
11// function.
12//
13//===----------------------------------------------------------------------===//
14
16#include "llvm/ADT/BitVector.h"
17#include "llvm/ADT/DenseMap.h"
18#include "llvm/ADT/DenseSet.h"
19#include "llvm/ADT/STLExtras.h"
22#include "llvm/ADT/StringRef.h"
23#include "llvm/ADT/Twine.h"
43#include "llvm/Config/llvm-config.h"
44#include "llvm/IR/Attributes.h"
45#include "llvm/IR/BasicBlock.h"
46#include "llvm/IR/Constant.h"
47#include "llvm/IR/DataLayout.h"
50#include "llvm/IR/Function.h"
51#include "llvm/IR/GlobalValue.h"
52#include "llvm/IR/Instruction.h"
54#include "llvm/IR/Metadata.h"
55#include "llvm/IR/Module.h"
57#include "llvm/IR/Value.h"
58#include "llvm/MC/MCContext.h"
59#include "llvm/MC/MCSymbol.h"
60#include "llvm/MC/SectionKind.h"
69#include <algorithm>
70#include <cassert>
71#include <cstddef>
72#include <cstdint>
73#include <iterator>
74#include <string>
75#include <type_traits>
76#include <utility>
77#include <vector>
78
80
81using namespace llvm;
82
83#define DEBUG_TYPE "codegen"
84
86 "align-all-functions",
87 cl::desc("Force the alignment of all functions in log2 format (e.g. 4 "
88 "means align on 16B boundaries)."),
90
93
94 // clang-format off
95 switch(Prop) {
96 case P::FailedISel: return "FailedISel";
97 case P::IsSSA: return "IsSSA";
98 case P::Legalized: return "Legalized";
99 case P::NoPHIs: return "NoPHIs";
100 case P::NoVRegs: return "NoVRegs";
101 case P::RegBankSelected: return "RegBankSelected";
102 case P::Selected: return "Selected";
103 case P::TracksLiveness: return "TracksLiveness";
104 case P::TiedOpsRewritten: return "TiedOpsRewritten";
105 case P::FailsVerification: return "FailsVerification";
106 case P::TracksDebugUserValues: return "TracksDebugUserValues";
107 }
108 // clang-format on
109 llvm_unreachable("Invalid machine function property");
110}
111
113 if (!F.hasFnAttribute(Attribute::SafeStack))
114 return;
115
116 auto *Existing =
117 dyn_cast_or_null<MDTuple>(F.getMetadata(LLVMContext::MD_annotation));
118
119 if (!Existing || Existing->getNumOperands() != 2)
120 return;
121
122 auto *MetadataName = "unsafe-stack-size";
123 if (auto &N = Existing->getOperand(0)) {
124 if (N.equalsStr(MetadataName)) {
125 if (auto &Op = Existing->getOperand(1)) {
126 auto Val = mdconst::extract<ConstantInt>(Op)->getZExtValue();
127 FrameInfo.setUnsafeStackSize(Val);
128 }
129 }
130 }
131}
132
133// Pin the vtable to this file.
134void MachineFunction::Delegate::anchor() {}
135
137 const char *Separator = "";
138 for (BitVector::size_type I = 0; I < Properties.size(); ++I) {
139 if (!Properties[I])
140 continue;
141 OS << Separator << getPropertyName(static_cast<Property>(I));
142 Separator = ", ";
143 }
144}
145
146//===----------------------------------------------------------------------===//
147// MachineFunction implementation
148//===----------------------------------------------------------------------===//
149
150// Out-of-line virtual method.
152
155}
156
158 const Function &F) {
159 if (auto MA = F.getFnStackAlign())
160 return *MA;
161 return STI->getFrameLowering()->getStackAlign();
162}
163
165 const TargetSubtargetInfo &STI,
166 unsigned FunctionNum, MachineModuleInfo &mmi)
167 : F(F), Target(Target), STI(&STI), Ctx(mmi.getContext()), MMI(mmi) {
168 FunctionNumber = FunctionNum;
169 init();
170}
171
172void MachineFunction::handleInsertion(MachineInstr &MI) {
173 if (TheDelegate)
174 TheDelegate->MF_HandleInsertion(MI);
175}
176
177void MachineFunction::handleRemoval(MachineInstr &MI) {
178 if (TheDelegate)
179 TheDelegate->MF_HandleRemoval(MI);
180}
181
183 const MCInstrDesc &TID) {
184 if (TheDelegate)
185 TheDelegate->MF_HandleChangeDesc(MI, TID);
186}
187
188void MachineFunction::init() {
189 // Assume the function starts in SSA form with correct liveness.
192 if (STI->getRegisterInfo())
193 RegInfo = new (Allocator) MachineRegisterInfo(this);
194 else
195 RegInfo = nullptr;
196
197 MFInfo = nullptr;
198
199 // We can realign the stack if the target supports it and the user hasn't
200 // explicitly asked us not to.
201 bool CanRealignSP = STI->getFrameLowering()->isStackRealignable() &&
202 !F.hasFnAttribute("no-realign-stack");
203 bool ForceRealignSP = F.hasFnAttribute(Attribute::StackAlignment) ||
204 F.hasFnAttribute("stackrealign");
205 FrameInfo = new (Allocator) MachineFrameInfo(
206 getFnStackAlignment(STI, F), /*StackRealignable=*/CanRealignSP,
207 /*ForcedRealign=*/ForceRealignSP && CanRealignSP);
208
209 setUnsafeStackSize(F, *FrameInfo);
210
211 if (F.hasFnAttribute(Attribute::StackAlignment))
212 FrameInfo->ensureMaxAlignment(*F.getFnStackAlign());
213
215 Alignment = STI->getTargetLowering()->getMinFunctionAlignment();
216
217 // FIXME: Shouldn't use pref alignment if explicit alignment is set on F.
218 // FIXME: Use Function::hasOptSize().
219 if (!F.hasFnAttribute(Attribute::OptimizeForSize))
220 Alignment = std::max(Alignment,
222
223 // -fsanitize=function and -fsanitize=kcfi instrument indirect function calls
224 // to load a type hash before the function label. Ensure functions are aligned
225 // by a least 4 to avoid unaligned access, which is especially important for
226 // -mno-unaligned-access.
227 if (F.hasMetadata(LLVMContext::MD_func_sanitize) ||
228 F.getMetadata(LLVMContext::MD_kcfi_type))
229 Alignment = std::max(Alignment, Align(4));
230
232 Alignment = Align(1ULL << AlignAllFunctions);
233
234 JumpTableInfo = nullptr;
235
237 F.hasPersonalityFn() ? F.getPersonalityFn() : nullptr))) {
238 WinEHInfo = new (Allocator) WinEHFuncInfo();
239 }
240
242 F.hasPersonalityFn() ? F.getPersonalityFn() : nullptr))) {
243 WasmEHInfo = new (Allocator) WasmEHFuncInfo();
244 }
245
246 assert(Target.isCompatibleDataLayout(getDataLayout()) &&
247 "Can't create a MachineFunction using a Module with a "
248 "Target-incompatible DataLayout attached\n");
249
250 PSVManager = std::make_unique<PseudoSourceValueManager>(getTarget());
251}
252
254 const TargetSubtargetInfo &STI) {
255 assert(!MFInfo && "MachineFunctionInfo already set");
256 MFInfo = Target.createMachineFunctionInfo(Allocator, F, &STI);
257}
258
260 clear();
261}
262
263void MachineFunction::clear() {
264 Properties.reset();
265 // Don't call destructors on MachineInstr and MachineOperand. All of their
266 // memory comes from the BumpPtrAllocator which is about to be purged.
267 //
268 // Do call MachineBasicBlock destructors, it contains std::vectors.
269 for (iterator I = begin(), E = end(); I != E; I = BasicBlocks.erase(I))
270 I->Insts.clearAndLeakNodesUnsafely();
271 MBBNumbering.clear();
272
273 InstructionRecycler.clear(Allocator);
274 OperandRecycler.clear(Allocator);
275 BasicBlockRecycler.clear(Allocator);
276 CodeViewAnnotations.clear();
278 if (RegInfo) {
279 RegInfo->~MachineRegisterInfo();
280 Allocator.Deallocate(RegInfo);
281 }
282 if (MFInfo) {
283 MFInfo->~MachineFunctionInfo();
284 Allocator.Deallocate(MFInfo);
285 }
286
287 FrameInfo->~MachineFrameInfo();
288 Allocator.Deallocate(FrameInfo);
289
290 ConstantPool->~MachineConstantPool();
291 Allocator.Deallocate(ConstantPool);
292
293 if (JumpTableInfo) {
294 JumpTableInfo->~MachineJumpTableInfo();
295 Allocator.Deallocate(JumpTableInfo);
296 }
297
298 if (WinEHInfo) {
299 WinEHInfo->~WinEHFuncInfo();
300 Allocator.Deallocate(WinEHInfo);
301 }
302
303 if (WasmEHInfo) {
304 WasmEHInfo->~WasmEHFuncInfo();
305 Allocator.Deallocate(WasmEHInfo);
306 }
307}
308
310 return F.getParent()->getDataLayout();
311}
312
313/// Get the JumpTableInfo for this function.
314/// If it does not already exist, allocate one.
316getOrCreateJumpTableInfo(unsigned EntryKind) {
317 if (JumpTableInfo) return JumpTableInfo;
318
319 JumpTableInfo = new (Allocator)
321 return JumpTableInfo;
322}
323
325 return F.getDenormalMode(FPType);
326}
327
328/// Should we be emitting segmented stack stuff for the function
330 return getFunction().hasFnAttribute("split-stack");
331}
332
333[[nodiscard]] unsigned
335 FrameInstructions.push_back(Inst);
336 return FrameInstructions.size() - 1;
337}
338
339/// This discards all of the MachineBasicBlock numbers and recomputes them.
340/// This guarantees that the MBB numbers are sequential, dense, and match the
341/// ordering of the blocks within the function. If a specific MachineBasicBlock
342/// is specified, only that block and those after it are renumbered.
344 if (empty()) { MBBNumbering.clear(); return; }
346 if (MBB == nullptr)
347 MBBI = begin();
348 else
349 MBBI = MBB->getIterator();
350
351 // Figure out the block number this should have.
352 unsigned BlockNo = 0;
353 if (MBBI != begin())
354 BlockNo = std::prev(MBBI)->getNumber() + 1;
355
356 for (; MBBI != E; ++MBBI, ++BlockNo) {
357 if (MBBI->getNumber() != (int)BlockNo) {
358 // Remove use of the old number.
359 if (MBBI->getNumber() != -1) {
360 assert(MBBNumbering[MBBI->getNumber()] == &*MBBI &&
361 "MBB number mismatch!");
362 MBBNumbering[MBBI->getNumber()] = nullptr;
363 }
364
365 // If BlockNo is already taken, set that block's number to -1.
366 if (MBBNumbering[BlockNo])
367 MBBNumbering[BlockNo]->setNumber(-1);
368
369 MBBNumbering[BlockNo] = &*MBBI;
370 MBBI->setNumber(BlockNo);
371 }
372 }
373
374 // Okay, all the blocks are renumbered. If we have compactified the block
375 // numbering, shrink MBBNumbering now.
376 assert(BlockNo <= MBBNumbering.size() && "Mismatch!");
377 MBBNumbering.resize(BlockNo);
378}
379
380/// This method iterates over the basic blocks and assigns their IsBeginSection
381/// and IsEndSection fields. This must be called after MBB layout is finalized
382/// and the SectionID's are assigned to MBBs.
385 auto CurrentSectionID = front().getSectionID();
386 for (auto MBBI = std::next(begin()), E = end(); MBBI != E; ++MBBI) {
387 if (MBBI->getSectionID() == CurrentSectionID)
388 continue;
390 std::prev(MBBI)->setIsEndSection();
391 CurrentSectionID = MBBI->getSectionID();
392 }
394}
395
396/// Allocate a new MachineInstr. Use this instead of `new MachineInstr'.
398 DebugLoc DL,
399 bool NoImplicit) {
400 return new (InstructionRecycler.Allocate<MachineInstr>(Allocator))
401 MachineInstr(*this, MCID, std::move(DL), NoImplicit);
402}
403
404/// Create a new MachineInstr which is a copy of the 'Orig' instruction,
405/// identical in all ways except the instruction has no parent, prev, or next.
408 return new (InstructionRecycler.Allocate<MachineInstr>(Allocator))
409 MachineInstr(*this, *Orig);
410}
411
414 const MachineInstr &Orig) {
415 MachineInstr *FirstClone = nullptr;
417 while (true) {
418 MachineInstr *Cloned = CloneMachineInstr(&*I);
419 MBB.insert(InsertBefore, Cloned);
420 if (FirstClone == nullptr) {
421 FirstClone = Cloned;
422 } else {
423 Cloned->bundleWithPred();
424 }
425
426 if (!I->isBundledWithSucc())
427 break;
428 ++I;
429 }
430 // Copy over call site info to the cloned instruction if needed. If Orig is in
431 // a bundle, copyCallSiteInfo takes care of finding the call instruction in
432 // the bundle.
433 if (Orig.shouldUpdateCallSiteInfo())
434 copyCallSiteInfo(&Orig, FirstClone);
435 return *FirstClone;
436}
437
438/// Delete the given MachineInstr.
439///
440/// This function also serves as the MachineInstr destructor - the real
441/// ~MachineInstr() destructor must be empty.
443 // Verify that a call site info is at valid state. This assertion should
444 // be triggered during the implementation of support for the
445 // call site info of a new architecture. If the assertion is triggered,
446 // back trace will tell where to insert a call to updateCallSiteInfo().
447 assert((!MI->isCandidateForCallSiteEntry() || !CallSitesInfo.contains(MI)) &&
448 "Call site info was not updated!");
449 // Strip it for parts. The operand array and the MI object itself are
450 // independently recyclable.
451 if (MI->Operands)
452 deallocateOperandArray(MI->CapOperands, MI->Operands);
453 // Don't call ~MachineInstr() which must be trivial anyway because
454 // ~MachineFunction drops whole lists of MachineInstrs wihout calling their
455 // destructors.
456 InstructionRecycler.Deallocate(Allocator, MI);
457}
458
459/// Allocate a new MachineBasicBlock. Use this instead of
460/// `new MachineBasicBlock'.
463 std::optional<UniqueBBID> BBID) {
465 new (BasicBlockRecycler.Allocate<MachineBasicBlock>(Allocator))
466 MachineBasicBlock(*this, BB);
467 // Set BBID for `-basic-block=sections=labels` and
468 // `-basic-block-sections=list` to allow robust mapping of profiles to basic
469 // blocks.
470 if (Target.getBBSectionsType() == BasicBlockSection::Labels ||
471 Target.Options.BBAddrMap ||
472 Target.getBBSectionsType() == BasicBlockSection::List)
473 MBB->setBBID(BBID.has_value() ? *BBID : UniqueBBID{NextBBID++, 0});
474 return MBB;
475}
476
477/// Delete the given MachineBasicBlock.
479 assert(MBB->getParent() == this && "MBB parent mismatch!");
480 // Clean up any references to MBB in jump tables before deleting it.
481 if (JumpTableInfo)
482 JumpTableInfo->RemoveMBBFromJumpTables(MBB);
483 MBB->~MachineBasicBlock();
484 BasicBlockRecycler.Deallocate(Allocator, MBB);
485}
486
489 Align BaseAlignment, const AAMDNodes &AAInfo, const MDNode *Ranges,
490 SyncScope::ID SSID, AtomicOrdering Ordering,
491 AtomicOrdering FailureOrdering) {
492 assert((!Size.hasValue() ||
493 Size.getValue().getKnownMinValue() != ~UINT64_C(0)) &&
494 "Unexpected an unknown size to be represented using "
495 "LocationSize::beforeOrAfter()");
496 return new (Allocator)
497 MachineMemOperand(PtrInfo, F, Size, BaseAlignment, AAInfo, Ranges, SSID,
498 Ordering, FailureOrdering);
499}
500
503 Align base_alignment, const AAMDNodes &AAInfo, const MDNode *Ranges,
504 SyncScope::ID SSID, AtomicOrdering Ordering,
505 AtomicOrdering FailureOrdering) {
506 return new (Allocator)
507 MachineMemOperand(PtrInfo, f, MemTy, base_alignment, AAInfo, Ranges, SSID,
508 Ordering, FailureOrdering);
509}
510
513 const MachinePointerInfo &PtrInfo,
515 assert((!Size.hasValue() ||
516 Size.getValue().getKnownMinValue() != ~UINT64_C(0)) &&
517 "Unexpected an unknown size to be represented using "
518 "LocationSize::beforeOrAfter()");
519 return new (Allocator)
520 MachineMemOperand(PtrInfo, MMO->getFlags(), Size, MMO->getBaseAlign(),
521 AAMDNodes(), nullptr, MMO->getSyncScopeID(),
523}
524
526 const MachineMemOperand *MMO, const MachinePointerInfo &PtrInfo, LLT Ty) {
527 return new (Allocator)
528 MachineMemOperand(PtrInfo, MMO->getFlags(), Ty, MMO->getBaseAlign(),
529 AAMDNodes(), nullptr, MMO->getSyncScopeID(),
531}
532
535 int64_t Offset, LLT Ty) {
536 const MachinePointerInfo &PtrInfo = MMO->getPointerInfo();
537
538 // If there is no pointer value, the offset isn't tracked so we need to adjust
539 // the base alignment.
540 Align Alignment = PtrInfo.V.isNull()
542 : MMO->getBaseAlign();
543
544 // Do not preserve ranges, since we don't necessarily know what the high bits
545 // are anymore.
546 return new (Allocator) MachineMemOperand(
547 PtrInfo.getWithOffset(Offset), MMO->getFlags(), Ty, Alignment,
548 MMO->getAAInfo(), nullptr, MMO->getSyncScopeID(),
550}
551
554 const AAMDNodes &AAInfo) {
555 MachinePointerInfo MPI = MMO->getValue() ?
556 MachinePointerInfo(MMO->getValue(), MMO->getOffset()) :
558
559 return new (Allocator) MachineMemOperand(
560 MPI, MMO->getFlags(), MMO->getSize(), MMO->getBaseAlign(), AAInfo,
561 MMO->getRanges(), MMO->getSyncScopeID(), MMO->getSuccessOrdering(),
562 MMO->getFailureOrdering());
563}
564
568 return new (Allocator) MachineMemOperand(
569 MMO->getPointerInfo(), Flags, MMO->getSize(), MMO->getBaseAlign(),
570 MMO->getAAInfo(), MMO->getRanges(), MMO->getSyncScopeID(),
572}
573
574MachineInstr::ExtraInfo *MachineFunction::createMIExtraInfo(
575 ArrayRef<MachineMemOperand *> MMOs, MCSymbol *PreInstrSymbol,
576 MCSymbol *PostInstrSymbol, MDNode *HeapAllocMarker, MDNode *PCSections,
577 uint32_t CFIType, MDNode *MMRAs) {
578 return MachineInstr::ExtraInfo::create(Allocator, MMOs, PreInstrSymbol,
579 PostInstrSymbol, HeapAllocMarker,
580 PCSections, CFIType, MMRAs);
581}
582
584 char *Dest = Allocator.Allocate<char>(Name.size() + 1);
585 llvm::copy(Name, Dest);
586 Dest[Name.size()] = 0;
587 return Dest;
588}
589
591 unsigned NumRegs = getSubtarget().getRegisterInfo()->getNumRegs();
592 unsigned Size = MachineOperand::getRegMaskSize(NumRegs);
593 uint32_t *Mask = Allocator.Allocate<uint32_t>(Size);
594 memset(Mask, 0, Size * sizeof(Mask[0]));
595 return Mask;
596}
597
599 int* AllocMask = Allocator.Allocate<int>(Mask.size());
600 copy(Mask, AllocMask);
601 return {AllocMask, Mask.size()};
602}
603
604#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
606 print(dbgs());
607}
608#endif
609
611 return getFunction().getName();
612}
613
614void MachineFunction::print(raw_ostream &OS, const SlotIndexes *Indexes) const {
615 OS << "# Machine code for function " << getName() << ": ";
617 OS << '\n';
618
619 // Print Frame Information
620 FrameInfo->print(*this, OS);
621
622 // Print JumpTable Information
623 if (JumpTableInfo)
624 JumpTableInfo->print(OS);
625
626 // Print Constant Pool
627 ConstantPool->print(OS);
628
630
631 if (RegInfo && !RegInfo->livein_empty()) {
632 OS << "Function Live Ins: ";
634 I = RegInfo->livein_begin(), E = RegInfo->livein_end(); I != E; ++I) {
635 OS << printReg(I->first, TRI);
636 if (I->second)
637 OS << " in " << printReg(I->second, TRI);
638 if (std::next(I) != E)
639 OS << ", ";
640 }
641 OS << '\n';
642 }
643
646 for (const auto &BB : *this) {
647 OS << '\n';
648 // If we print the whole function, print it at its most verbose level.
649 BB.print(OS, MST, Indexes, /*IsStandalone=*/true);
650 }
651
652 OS << "\n# End machine code for function " << getName() << ".\n\n";
653}
654
655/// True if this function needs frame moves for debug or exceptions.
657 return getMMI().hasDebugInfo() ||
660}
661
662namespace llvm {
663
664 template<>
667
668 static std::string getGraphName(const MachineFunction *F) {
669 return ("CFG for '" + F->getName() + "' function").str();
670 }
671
672 std::string getNodeLabel(const MachineBasicBlock *Node,
673 const MachineFunction *Graph) {
674 std::string OutStr;
675 {
676 raw_string_ostream OSS(OutStr);
677
678 if (isSimple()) {
679 OSS << printMBBReference(*Node);
680 if (const BasicBlock *BB = Node->getBasicBlock())
681 OSS << ": " << BB->getName();
682 } else
683 Node->print(OSS);
684 }
685
686 if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
687
688 // Process string output to make it nicer...
689 for (unsigned i = 0; i != OutStr.length(); ++i)
690 if (OutStr[i] == '\n') { // Left justify
691 OutStr[i] = '\\';
692 OutStr.insert(OutStr.begin()+i+1, 'l');
693 }
694 return OutStr;
695 }
696 };
697
698} // end namespace llvm
699
701{
702#ifndef NDEBUG
703 ViewGraph(this, "mf" + getName());
704#else
705 errs() << "MachineFunction::viewCFG is only available in debug builds on "
706 << "systems with Graphviz or gv!\n";
707#endif // NDEBUG
708}
709
711{
712#ifndef NDEBUG
713 ViewGraph(this, "mf" + getName(), true);
714#else
715 errs() << "MachineFunction::viewCFGOnly is only available in debug builds on "
716 << "systems with Graphviz or gv!\n";
717#endif // NDEBUG
718}
719
720/// Add the specified physical register as a live-in value and
721/// create a corresponding virtual register for it.
723 const TargetRegisterClass *RC) {
725 Register VReg = MRI.getLiveInVirtReg(PReg);
726 if (VReg) {
727 const TargetRegisterClass *VRegRC = MRI.getRegClass(VReg);
728 (void)VRegRC;
729 // A physical register can be added several times.
730 // Between two calls, the register class of the related virtual register
731 // may have been constrained to match some operation constraints.
732 // In that case, check that the current register class includes the
733 // physical register and is a sub class of the specified RC.
734 assert((VRegRC == RC || (VRegRC->contains(PReg) &&
735 RC->hasSubClassEq(VRegRC))) &&
736 "Register class mismatch!");
737 return VReg;
738 }
739 VReg = MRI.createVirtualRegister(RC);
740 MRI.addLiveIn(PReg, VReg);
741 return VReg;
742}
743
744/// Return the MCSymbol for the specified non-empty jump table.
745/// If isLinkerPrivate is specified, an 'l' label is returned, otherwise a
746/// normal 'L' label is returned.
748 bool isLinkerPrivate) const {
749 const DataLayout &DL = getDataLayout();
750 assert(JumpTableInfo && "No jump tables");
751 assert(JTI < JumpTableInfo->getJumpTables().size() && "Invalid JTI!");
752
753 StringRef Prefix = isLinkerPrivate ? DL.getLinkerPrivateGlobalPrefix()
754 : DL.getPrivateGlobalPrefix();
757 << Prefix << "JTI" << getFunctionNumber() << '_' << JTI;
758 return Ctx.getOrCreateSymbol(Name);
759}
760
761/// Return a function-local symbol to represent the PIC base.
763 const DataLayout &DL = getDataLayout();
764 return Ctx.getOrCreateSymbol(Twine(DL.getPrivateGlobalPrefix()) +
765 Twine(getFunctionNumber()) + "$pb");
766}
767
768/// \name Exception Handling
769/// \{
770
773 unsigned N = LandingPads.size();
774 for (unsigned i = 0; i < N; ++i) {
775 LandingPadInfo &LP = LandingPads[i];
776 if (LP.LandingPadBlock == LandingPad)
777 return LP;
778 }
779
780 LandingPads.push_back(LandingPadInfo(LandingPad));
781 return LandingPads[N];
782}
783
785 MCSymbol *BeginLabel, MCSymbol *EndLabel) {
787 LP.BeginLabels.push_back(BeginLabel);
788 LP.EndLabels.push_back(EndLabel);
789}
790
792 MCSymbol *LandingPadLabel = Ctx.createTempSymbol();
794 LP.LandingPadLabel = LandingPadLabel;
795
796 const Instruction *FirstI = LandingPad->getBasicBlock()->getFirstNonPHI();
797 if (const auto *LPI = dyn_cast<LandingPadInst>(FirstI)) {
798 // If there's no typeid list specified, then "cleanup" is implicit.
799 // Otherwise, id 0 is reserved for the cleanup action.
800 if (LPI->isCleanup() && LPI->getNumClauses() != 0)
801 LP.TypeIds.push_back(0);
802
803 // FIXME: New EH - Add the clauses in reverse order. This isn't 100%
804 // correct, but we need to do it this way because of how the DWARF EH
805 // emitter processes the clauses.
806 for (unsigned I = LPI->getNumClauses(); I != 0; --I) {
807 Value *Val = LPI->getClause(I - 1);
808 if (LPI->isCatch(I - 1)) {
809 LP.TypeIds.push_back(
810 getTypeIDFor(dyn_cast<GlobalValue>(Val->stripPointerCasts())));
811 } else {
812 // Add filters in a list.
813 auto *CVal = cast<Constant>(Val);
814 SmallVector<unsigned, 4> FilterList;
815 for (const Use &U : CVal->operands())
816 FilterList.push_back(
817 getTypeIDFor(cast<GlobalValue>(U->stripPointerCasts())));
818
819 LP.TypeIds.push_back(getFilterIDFor(FilterList));
820 }
821 }
822
823 } else if (const auto *CPI = dyn_cast<CatchPadInst>(FirstI)) {
824 for (unsigned I = CPI->arg_size(); I != 0; --I) {
825 auto *TypeInfo =
826 dyn_cast<GlobalValue>(CPI->getArgOperand(I - 1)->stripPointerCasts());
827 LP.TypeIds.push_back(getTypeIDFor(TypeInfo));
828 }
829
830 } else {
831 assert(isa<CleanupPadInst>(FirstI) && "Invalid landingpad!");
832 }
833
834 return LandingPadLabel;
835}
836
838 ArrayRef<unsigned> Sites) {
839 LPadToCallSiteMap[Sym].append(Sites.begin(), Sites.end());
840}
841
843 for (unsigned i = 0, N = TypeInfos.size(); i != N; ++i)
844 if (TypeInfos[i] == TI) return i + 1;
845
846 TypeInfos.push_back(TI);
847 return TypeInfos.size();
848}
849
851 // If the new filter coincides with the tail of an existing filter, then
852 // re-use the existing filter. Folding filters more than this requires
853 // re-ordering filters and/or their elements - probably not worth it.
854 for (unsigned i : FilterEnds) {
855 unsigned j = TyIds.size();
856
857 while (i && j)
858 if (FilterIds[--i] != TyIds[--j])
859 goto try_next;
860
861 if (!j)
862 // The new filter coincides with range [i, end) of the existing filter.
863 return -(1 + i);
864
865try_next:;
866 }
867
868 // Add the new filter.
869 int FilterID = -(1 + FilterIds.size());
870 FilterIds.reserve(FilterIds.size() + TyIds.size() + 1);
871 llvm::append_range(FilterIds, TyIds);
872 FilterEnds.push_back(FilterIds.size());
873 FilterIds.push_back(0); // terminator
874 return FilterID;
875}
876
878MachineFunction::getCallSiteInfo(const MachineInstr *MI) {
879 assert(MI->isCandidateForCallSiteEntry() &&
880 "Call site info refers only to call (MI) candidates");
881
882 if (!Target.Options.EmitCallSiteInfo)
883 return CallSitesInfo.end();
884 return CallSitesInfo.find(MI);
885}
886
887/// Return the call machine instruction or find a call within bundle.
889 if (!MI->isBundle())
890 return MI;
891
892 for (const auto &BMI : make_range(getBundleStart(MI->getIterator()),
893 getBundleEnd(MI->getIterator())))
894 if (BMI.isCandidateForCallSiteEntry())
895 return &BMI;
896
897 llvm_unreachable("Unexpected bundle without a call site candidate");
898}
899
901 assert(MI->shouldUpdateCallSiteInfo() &&
902 "Call site info refers only to call (MI) candidates or "
903 "candidates inside bundles");
904
905 const MachineInstr *CallMI = getCallInstr(MI);
906 CallSiteInfoMap::iterator CSIt = getCallSiteInfo(CallMI);
907 if (CSIt == CallSitesInfo.end())
908 return;
909 CallSitesInfo.erase(CSIt);
910}
911
913 const MachineInstr *New) {
915 "Call site info refers only to call (MI) candidates or "
916 "candidates inside bundles");
917
918 if (!New->isCandidateForCallSiteEntry())
919 return eraseCallSiteInfo(Old);
920
921 const MachineInstr *OldCallMI = getCallInstr(Old);
922 CallSiteInfoMap::iterator CSIt = getCallSiteInfo(OldCallMI);
923 if (CSIt == CallSitesInfo.end())
924 return;
925
926 CallSiteInfo CSInfo = CSIt->second;
927 CallSitesInfo[New] = CSInfo;
928}
929
931 const MachineInstr *New) {
933 "Call site info refers only to call (MI) candidates or "
934 "candidates inside bundles");
935
936 if (!New->isCandidateForCallSiteEntry())
937 return eraseCallSiteInfo(Old);
938
939 const MachineInstr *OldCallMI = getCallInstr(Old);
940 CallSiteInfoMap::iterator CSIt = getCallSiteInfo(OldCallMI);
941 if (CSIt == CallSitesInfo.end())
942 return;
943
944 CallSiteInfo CSInfo = std::move(CSIt->second);
945 CallSitesInfo.erase(CSIt);
946 CallSitesInfo[New] = CSInfo;
947}
948
951}
952
955 unsigned Subreg) {
956 // Catch any accidental self-loops.
957 assert(A.first != B.first);
958 // Don't allow any substitutions _from_ the memory operand number.
959 assert(A.second != DebugOperandMemNumber);
960
961 DebugValueSubstitutions.push_back({A, B, Subreg});
962}
963
965 MachineInstr &New,
966 unsigned MaxOperand) {
967 // If the Old instruction wasn't tracked at all, there is no work to do.
968 unsigned OldInstrNum = Old.peekDebugInstrNum();
969 if (!OldInstrNum)
970 return;
971
972 // Iterate over all operands looking for defs to create substitutions for.
973 // Avoid creating new instr numbers unless we create a new substitution.
974 // While this has no functional effect, it risks confusing someone reading
975 // MIR output.
976 // Examine all the operands, or the first N specified by the caller.
977 MaxOperand = std::min(MaxOperand, Old.getNumOperands());
978 for (unsigned int I = 0; I < MaxOperand; ++I) {
979 const auto &OldMO = Old.getOperand(I);
980 auto &NewMO = New.getOperand(I);
981 (void)NewMO;
982
983 if (!OldMO.isReg() || !OldMO.isDef())
984 continue;
985 assert(NewMO.isDef());
986
987 unsigned NewInstrNum = New.getDebugInstrNum();
988 makeDebugValueSubstitution(std::make_pair(OldInstrNum, I),
989 std::make_pair(NewInstrNum, I));
990 }
991}
992
996 const TargetInstrInfo &TII = *getSubtarget().getInstrInfo();
997
998 // Check whether this copy-like instruction has already been salvaged into
999 // an operand pair.
1000 Register Dest;
1001 if (auto CopyDstSrc = TII.isCopyInstr(MI)) {
1002 Dest = CopyDstSrc->Destination->getReg();
1003 } else {
1004 assert(MI.isSubregToReg());
1005 Dest = MI.getOperand(0).getReg();
1006 }
1007
1008 auto CacheIt = DbgPHICache.find(Dest);
1009 if (CacheIt != DbgPHICache.end())
1010 return CacheIt->second;
1011
1012 // Calculate the instruction number to use, or install a DBG_PHI.
1013 auto OperandPair = salvageCopySSAImpl(MI);
1014 DbgPHICache.insert({Dest, OperandPair});
1015 return OperandPair;
1016}
1017
1020 MachineRegisterInfo &MRI = getRegInfo();
1021 const TargetRegisterInfo &TRI = *MRI.getTargetRegisterInfo();
1022 const TargetInstrInfo &TII = *getSubtarget().getInstrInfo();
1023
1024 // Chase the value read by a copy-like instruction back to the instruction
1025 // that ultimately _defines_ that value. This may pass:
1026 // * Through multiple intermediate copies, including subregister moves /
1027 // copies,
1028 // * Copies from physical registers that must then be traced back to the
1029 // defining instruction,
1030 // * Or, physical registers may be live-in to (only) the entry block, which
1031 // requires a DBG_PHI to be created.
1032 // We can pursue this problem in that order: trace back through copies,
1033 // optionally through a physical register, to a defining instruction. We
1034 // should never move from physreg to vreg. As we're still in SSA form, no need
1035 // to worry about partial definitions of registers.
1036
1037 // Helper lambda to interpret a copy-like instruction. Takes instruction,
1038 // returns the register read and any subregister identifying which part is
1039 // read.
1040 auto GetRegAndSubreg =
1041 [&](const MachineInstr &Cpy) -> std::pair<Register, unsigned> {
1042 Register NewReg, OldReg;
1043 unsigned SubReg;
1044 if (Cpy.isCopy()) {
1045 OldReg = Cpy.getOperand(0).getReg();
1046 NewReg = Cpy.getOperand(1).getReg();
1047 SubReg = Cpy.getOperand(1).getSubReg();
1048 } else if (Cpy.isSubregToReg()) {
1049 OldReg = Cpy.getOperand(0).getReg();
1050 NewReg = Cpy.getOperand(2).getReg();
1051 SubReg = Cpy.getOperand(3).getImm();
1052 } else {
1053 auto CopyDetails = *TII.isCopyInstr(Cpy);
1054 const MachineOperand &Src = *CopyDetails.Source;
1055 const MachineOperand &Dest = *CopyDetails.Destination;
1056 OldReg = Dest.getReg();
1057 NewReg = Src.getReg();
1058 SubReg = Src.getSubReg();
1059 }
1060
1061 return {NewReg, SubReg};
1062 };
1063
1064 // First seek either the defining instruction, or a copy from a physreg.
1065 // During search, the current state is the current copy instruction, and which
1066 // register we've read. Accumulate qualifying subregisters into SubregsSeen;
1067 // deal with those later.
1068 auto State = GetRegAndSubreg(MI);
1069 auto CurInst = MI.getIterator();
1070 SmallVector<unsigned, 4> SubregsSeen;
1071 while (true) {
1072 // If we've found a copy from a physreg, first portion of search is over.
1073 if (!State.first.isVirtual())
1074 break;
1075
1076 // Record any subregister qualifier.
1077 if (State.second)
1078 SubregsSeen.push_back(State.second);
1079
1080 assert(MRI.hasOneDef(State.first));
1081 MachineInstr &Inst = *MRI.def_begin(State.first)->getParent();
1082 CurInst = Inst.getIterator();
1083
1084 // Any non-copy instruction is the defining instruction we're seeking.
1085 if (!Inst.isCopyLike() && !TII.isCopyInstr(Inst))
1086 break;
1087 State = GetRegAndSubreg(Inst);
1088 };
1089
1090 // Helper lambda to apply additional subregister substitutions to a known
1091 // instruction/operand pair. Adds new (fake) substitutions so that we can
1092 // record the subregister. FIXME: this isn't very space efficient if multiple
1093 // values are tracked back through the same copies; cache something later.
1094 auto ApplySubregisters =
1096 for (unsigned Subreg : reverse(SubregsSeen)) {
1097 // Fetch a new instruction number, not attached to an actual instruction.
1098 unsigned NewInstrNumber = getNewDebugInstrNum();
1099 // Add a substitution from the "new" number to the known one, with a
1100 // qualifying subreg.
1101 makeDebugValueSubstitution({NewInstrNumber, 0}, P, Subreg);
1102 // Return the new number; to find the underlying value, consumers need to
1103 // deal with the qualifying subreg.
1104 P = {NewInstrNumber, 0};
1105 }
1106 return P;
1107 };
1108
1109 // If we managed to find the defining instruction after COPYs, return an
1110 // instruction / operand pair after adding subregister qualifiers.
1111 if (State.first.isVirtual()) {
1112 // Virtual register def -- we can just look up where this happens.
1113 MachineInstr *Inst = MRI.def_begin(State.first)->getParent();
1114 for (auto &MO : Inst->all_defs()) {
1115 if (MO.getReg() != State.first)
1116 continue;
1117 return ApplySubregisters({Inst->getDebugInstrNum(), MO.getOperandNo()});
1118 }
1119
1120 llvm_unreachable("Vreg def with no corresponding operand?");
1121 }
1122
1123 // Our search ended in a copy from a physreg: walk back up the function
1124 // looking for whatever defines the physreg.
1125 assert(CurInst->isCopyLike() || TII.isCopyInstr(*CurInst));
1126 State = GetRegAndSubreg(*CurInst);
1127 Register RegToSeek = State.first;
1128
1129 auto RMII = CurInst->getReverseIterator();
1130 auto PrevInstrs = make_range(RMII, CurInst->getParent()->instr_rend());
1131 for (auto &ToExamine : PrevInstrs) {
1132 for (auto &MO : ToExamine.all_defs()) {
1133 // Test for operand that defines something aliasing RegToSeek.
1134 if (!TRI.regsOverlap(RegToSeek, MO.getReg()))
1135 continue;
1136
1137 return ApplySubregisters(
1138 {ToExamine.getDebugInstrNum(), MO.getOperandNo()});
1139 }
1140 }
1141
1142 MachineBasicBlock &InsertBB = *CurInst->getParent();
1143
1144 // We reached the start of the block before finding a defining instruction.
1145 // There are numerous scenarios where this can happen:
1146 // * Constant physical registers,
1147 // * Several intrinsics that allow LLVM-IR to read arbitary registers,
1148 // * Arguments in the entry block,
1149 // * Exception handling landing pads.
1150 // Validating all of them is too difficult, so just insert a DBG_PHI reading
1151 // the variable value at this position, rather than checking it makes sense.
1152
1153 // Create DBG_PHI for specified physreg.
1154 auto Builder = BuildMI(InsertBB, InsertBB.getFirstNonPHI(), DebugLoc(),
1155 TII.get(TargetOpcode::DBG_PHI));
1156 Builder.addReg(State.first);
1157 unsigned NewNum = getNewDebugInstrNum();
1158 Builder.addImm(NewNum);
1159 return ApplySubregisters({NewNum, 0u});
1160}
1161
1163 auto *TII = getSubtarget().getInstrInfo();
1164
1165 auto MakeUndefDbgValue = [&](MachineInstr &MI) {
1166 const MCInstrDesc &RefII = TII->get(TargetOpcode::DBG_VALUE_LIST);
1167 MI.setDesc(RefII);
1168 MI.setDebugValueUndef();
1169 };
1170
1172 for (auto &MBB : *this) {
1173 for (auto &MI : MBB) {
1174 if (!MI.isDebugRef())
1175 continue;
1176
1177 bool IsValidRef = true;
1178
1179 for (MachineOperand &MO : MI.debug_operands()) {
1180 if (!MO.isReg())
1181 continue;
1182
1183 Register Reg = MO.getReg();
1184
1185 // Some vregs can be deleted as redundant in the meantime. Mark those
1186 // as DBG_VALUE $noreg. Additionally, some normal instructions are
1187 // quickly deleted, leaving dangling references to vregs with no def.
1188 if (Reg == 0 || !RegInfo->hasOneDef(Reg)) {
1189 IsValidRef = false;
1190 break;
1191 }
1192
1193 assert(Reg.isVirtual());
1194 MachineInstr &DefMI = *RegInfo->def_instr_begin(Reg);
1195
1196 // If we've found a copy-like instruction, follow it back to the
1197 // instruction that defines the source value, see salvageCopySSA docs
1198 // for why this is important.
1199 if (DefMI.isCopyLike() || TII->isCopyInstr(DefMI)) {
1200 auto Result = salvageCopySSA(DefMI, ArgDbgPHIs);
1201 MO.ChangeToDbgInstrRef(Result.first, Result.second);
1202 } else {
1203 // Otherwise, identify the operand number that the VReg refers to.
1204 unsigned OperandIdx = 0;
1205 for (const auto &DefMO : DefMI.operands()) {
1206 if (DefMO.isReg() && DefMO.isDef() && DefMO.getReg() == Reg)
1207 break;
1208 ++OperandIdx;
1209 }
1210 assert(OperandIdx < DefMI.getNumOperands());
1211
1212 // Morph this instr ref to point at the given instruction and operand.
1213 unsigned ID = DefMI.getDebugInstrNum();
1214 MO.ChangeToDbgInstrRef(ID, OperandIdx);
1215 }
1216 }
1217
1218 if (!IsValidRef)
1219 MakeUndefDbgValue(MI);
1220 }
1221 }
1222}
1223
1225 // Disable instr-ref at -O0: it's very slow (in compile time). We can still
1226 // have optimized code inlined into this unoptimized code, however with
1227 // fewer and less aggressive optimizations happening, coverage and accuracy
1228 // should not suffer.
1229 if (getTarget().getOptLevel() == CodeGenOptLevel::None)
1230 return false;
1231
1232 // Don't use instr-ref if this function is marked optnone.
1233 if (F.hasFnAttribute(Attribute::OptimizeNone))
1234 return false;
1235
1236 if (llvm::debuginfoShouldUseDebugInstrRef(getTarget().getTargetTriple()))
1237 return true;
1238
1239 return false;
1240}
1241
1243 return UseDebugInstrRef;
1244}
1245
1248}
1249
1250// Use one million as a high / reserved number.
1251const unsigned MachineFunction::DebugOperandMemNumber = 1000000;
1252
1253/// \}
1254
1255//===----------------------------------------------------------------------===//
1256// MachineJumpTableInfo implementation
1257//===----------------------------------------------------------------------===//
1258
1259/// Return the size of each entry in the jump table.
1261 // The size of a jump table entry is 4 bytes unless the entry is just the
1262 // address of a block, in which case it is the pointer size.
1263 switch (getEntryKind()) {
1265 return TD.getPointerSize();
1268 return 8;
1272 return 4;
1274 return 0;
1275 }
1276 llvm_unreachable("Unknown jump table encoding!");
1277}
1278
1279/// Return the alignment of each entry in the jump table.
1281 // The alignment of a jump table entry is the alignment of int32 unless the
1282 // entry is just the address of a block, in which case it is the pointer
1283 // alignment.
1284 switch (getEntryKind()) {
1286 return TD.getPointerABIAlignment(0).value();
1289 return TD.getABIIntegerTypeAlignment(64).value();
1293 return TD.getABIIntegerTypeAlignment(32).value();
1295 return 1;
1296 }
1297 llvm_unreachable("Unknown jump table encoding!");
1298}
1299
1300/// Create a new jump table entry in the jump table info.
1302 const std::vector<MachineBasicBlock*> &DestBBs) {
1303 assert(!DestBBs.empty() && "Cannot create an empty jump table!");
1304 JumpTables.push_back(MachineJumpTableEntry(DestBBs));
1305 return JumpTables.size()-1;
1306}
1307
1308/// If Old is the target of any jump tables, update the jump tables to branch
1309/// to New instead.
1311 MachineBasicBlock *New) {
1312 assert(Old != New && "Not making a change?");
1313 bool MadeChange = false;
1314 for (size_t i = 0, e = JumpTables.size(); i != e; ++i)
1315 ReplaceMBBInJumpTable(i, Old, New);
1316 return MadeChange;
1317}
1318
1319/// If MBB is present in any jump tables, remove it.
1321 bool MadeChange = false;
1322 for (MachineJumpTableEntry &JTE : JumpTables) {
1323 auto removeBeginItr = std::remove(JTE.MBBs.begin(), JTE.MBBs.end(), MBB);
1324 MadeChange |= (removeBeginItr != JTE.MBBs.end());
1325 JTE.MBBs.erase(removeBeginItr, JTE.MBBs.end());
1326 }
1327 return MadeChange;
1328}
1329
1330/// If Old is a target of the jump tables, update the jump table to branch to
1331/// New instead.
1333 MachineBasicBlock *Old,
1334 MachineBasicBlock *New) {
1335 assert(Old != New && "Not making a change?");
1336 bool MadeChange = false;
1337 MachineJumpTableEntry &JTE = JumpTables[Idx];
1338 for (MachineBasicBlock *&MBB : JTE.MBBs)
1339 if (MBB == Old) {
1340 MBB = New;
1341 MadeChange = true;
1342 }
1343 return MadeChange;
1344}
1345
1347 if (JumpTables.empty()) return;
1348
1349 OS << "Jump Tables:\n";
1350
1351 for (unsigned i = 0, e = JumpTables.size(); i != e; ++i) {
1352 OS << printJumpTableEntryReference(i) << ':';
1353 for (const MachineBasicBlock *MBB : JumpTables[i].MBBs)
1354 OS << ' ' << printMBBReference(*MBB);
1355 if (i != e)
1356 OS << '\n';
1357 }
1358
1359 OS << '\n';
1360}
1361
1362#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
1364#endif
1365
1367 return Printable([Idx](raw_ostream &OS) { OS << "%jump-table." << Idx; });
1368}
1369
1370//===----------------------------------------------------------------------===//
1371// MachineConstantPool implementation
1372//===----------------------------------------------------------------------===//
1373
1374void MachineConstantPoolValue::anchor() {}
1375
1377 return DL.getTypeAllocSize(Ty);
1378}
1379
1382 return Val.MachineCPVal->getSizeInBytes(DL);
1383 return DL.getTypeAllocSize(Val.ConstVal->getType());
1384}
1385
1388 return true;
1389 return Val.ConstVal->needsDynamicRelocation();
1390}
1391
1394 if (needsRelocation())
1396 switch (getSizeInBytes(*DL)) {
1397 case 4:
1399 case 8:
1401 case 16:
1403 case 32:
1405 default:
1406 return SectionKind::getReadOnly();
1407 }
1408}
1409
1411 // A constant may be a member of both Constants and MachineCPVsSharingEntries,
1412 // so keep track of which we've deleted to avoid double deletions.
1414 for (const MachineConstantPoolEntry &C : Constants)
1415 if (C.isMachineConstantPoolEntry()) {
1416 Deleted.insert(C.Val.MachineCPVal);
1417 delete C.Val.MachineCPVal;
1418 }
1419 for (MachineConstantPoolValue *CPV : MachineCPVsSharingEntries) {
1420 if (Deleted.count(CPV) == 0)
1421 delete CPV;
1422 }
1423}
1424
1425/// Test whether the given two constants can be allocated the same constant pool
1426/// entry referenced by \param A.
1427static bool CanShareConstantPoolEntry(const Constant *A, const Constant *B,
1428 const DataLayout &DL) {
1429 // Handle the trivial case quickly.
1430 if (A == B) return true;
1431
1432 // If they have the same type but weren't the same constant, quickly
1433 // reject them.
1434 if (A->getType() == B->getType()) return false;
1435
1436 // We can't handle structs or arrays.
1437 if (isa<StructType>(A->getType()) || isa<ArrayType>(A->getType()) ||
1438 isa<StructType>(B->getType()) || isa<ArrayType>(B->getType()))
1439 return false;
1440
1441 // For now, only support constants with the same size.
1442 uint64_t StoreSize = DL.getTypeStoreSize(A->getType());
1443 if (StoreSize != DL.getTypeStoreSize(B->getType()) || StoreSize > 128)
1444 return false;
1445
1446 bool ContainsUndefOrPoisonA = A->containsUndefOrPoisonElement();
1447
1448 Type *IntTy = IntegerType::get(A->getContext(), StoreSize*8);
1449
1450 // Try constant folding a bitcast of both instructions to an integer. If we
1451 // get two identical ConstantInt's, then we are good to share them. We use
1452 // the constant folding APIs to do this so that we get the benefit of
1453 // DataLayout.
1454 if (isa<PointerType>(A->getType()))
1455 A = ConstantFoldCastOperand(Instruction::PtrToInt,
1456 const_cast<Constant *>(A), IntTy, DL);
1457 else if (A->getType() != IntTy)
1458 A = ConstantFoldCastOperand(Instruction::BitCast, const_cast<Constant *>(A),
1459 IntTy, DL);
1460 if (isa<PointerType>(B->getType()))
1461 B = ConstantFoldCastOperand(Instruction::PtrToInt,
1462 const_cast<Constant *>(B), IntTy, DL);
1463 else if (B->getType() != IntTy)
1464 B = ConstantFoldCastOperand(Instruction::BitCast, const_cast<Constant *>(B),
1465 IntTy, DL);
1466
1467 if (A != B)
1468 return false;
1469
1470 // Constants only safely match if A doesn't contain undef/poison.
1471 // As we'll be reusing A, it doesn't matter if B contain undef/poison.
1472 // TODO: Handle cases where A and B have the same undef/poison elements.
1473 // TODO: Merge A and B with mismatching undef/poison elements.
1474 return !ContainsUndefOrPoisonA;
1475}
1476
1477/// Create a new entry in the constant pool or return an existing one.
1478/// User must specify the log2 of the minimum required alignment for the object.
1480 Align Alignment) {
1481 if (Alignment > PoolAlignment) PoolAlignment = Alignment;
1482
1483 // Check to see if we already have this constant.
1484 //
1485 // FIXME, this could be made much more efficient for large constant pools.
1486 for (unsigned i = 0, e = Constants.size(); i != e; ++i)
1487 if (!Constants[i].isMachineConstantPoolEntry() &&
1488 CanShareConstantPoolEntry(Constants[i].Val.ConstVal, C, DL)) {
1489 if (Constants[i].getAlign() < Alignment)
1490 Constants[i].Alignment = Alignment;
1491 return i;
1492 }
1493
1494 Constants.push_back(MachineConstantPoolEntry(C, Alignment));
1495 return Constants.size()-1;
1496}
1497
1499 Align Alignment) {
1500 if (Alignment > PoolAlignment) PoolAlignment = Alignment;
1501
1502 // Check to see if we already have this constant.
1503 //
1504 // FIXME, this could be made much more efficient for large constant pools.
1505 int Idx = V->getExistingMachineCPValue(this, Alignment);
1506 if (Idx != -1) {
1507 MachineCPVsSharingEntries.insert(V);
1508 return (unsigned)Idx;
1509 }
1510
1511 Constants.push_back(MachineConstantPoolEntry(V, Alignment));
1512 return Constants.size()-1;
1513}
1514
1516 if (Constants.empty()) return;
1517
1518 OS << "Constant Pool:\n";
1519 for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
1520 OS << " cp#" << i << ": ";
1521 if (Constants[i].isMachineConstantPoolEntry())
1522 Constants[i].Val.MachineCPVal->print(OS);
1523 else
1524 Constants[i].Val.ConstVal->printAsOperand(OS, /*PrintType=*/false);
1525 OS << ", align=" << Constants[i].getAlign().value();
1526 OS << "\n";
1527 }
1528}
1529
1530//===----------------------------------------------------------------------===//
1531// Template specialization for MachineFunction implementation of
1532// ProfileSummaryInfo::getEntryCount().
1533//===----------------------------------------------------------------------===//
1534template <>
1535std::optional<Function::ProfileCount>
1536ProfileSummaryInfo::getEntryCount<llvm::MachineFunction>(
1537 const llvm::MachineFunction *F) const {
1538 return F->getFunction().getEntryCount();
1539}
1540
1541#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
1543#endif
unsigned SubReg
unsigned const MachineRegisterInfo * MRI
MachineInstrBuilder MachineInstrBuilder & DefMI
aarch64 promote const
MachineBasicBlock & MBB
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
MachineBasicBlock MachineBasicBlock::iterator MBBI
This file contains the simple types necessary to represent the attributes associated with functions a...
static const Function * getParent(const Value *V)
This file implements the BitVector class.
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
static GCRegistry::Add< ErlangGC > A("erlang", "erlang-compatible garbage collector")
#define LLVM_DUMP_METHOD
Mark debug helper function definitions like dump() that should not be stripped from debug builds.
Definition: Compiler.h:537
Returns the sub type a function will return at a given Idx Should correspond to the result type of an ExtractValue instruction executed with just that one unsigned Idx
This file defines the DenseMap class.
This file defines the DenseSet and SmallDenseSet classes.
std::string Name
uint64_t Size
Symbol * Sym
Definition: ELF_riscv.cpp:479
const HexagonInstrInfo * TII
IRTranslator LLVM IR MI
#define F(x, y, z)
Definition: MD5.cpp:55
#define I(x, y, z)
Definition: MD5.cpp:58
This file declares the MachineConstantPool class which is an abstract constant pool to keep track of ...
static Align getFnStackAlignment(const TargetSubtargetInfo *STI, const Function &F)
static cl::opt< unsigned > AlignAllFunctions("align-all-functions", cl::desc("Force the alignment of all functions in log2 format (e.g. 4 " "means align on 16B boundaries)."), cl::init(0), cl::Hidden)
static const MachineInstr * getCallInstr(const MachineInstr *MI)
Return the call machine instruction or find a call within bundle.
static bool CanShareConstantPoolEntry(const Constant *A, const Constant *B, const DataLayout &DL)
Test whether the given two constants can be allocated the same constant pool entry referenced by.
void setUnsafeStackSize(const Function &F, MachineFrameInfo &FrameInfo)
static const char * getPropertyName(MachineFunctionProperties::Property Prop)
unsigned const TargetRegisterInfo * TRI
unsigned Reg
This file contains the declarations for metadata subclasses.
Module.h This file contains the declarations for the Module class.
#define P(N)
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
static bool isSimple(Instruction *I)
This file contains some templates that are useful if you are working with the STL at all.
raw_pwrite_stream & OS
This file defines the SmallString class.
This file defines the SmallVector class.
This file describes how to lower LLVM code to machine code.
void clear(AllocatorType &Allocator)
Release all the tracked allocations to the allocator.
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: ArrayRef.h:41
iterator end() const
Definition: ArrayRef.h:154
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:165
iterator begin() const
Definition: ArrayRef.h:153
LLVM Basic Block Representation.
Definition: BasicBlock.h:60
const Instruction * getFirstNonPHI() const
Returns a pointer to the first instruction in this block that is not a PHINode instruction.
Definition: BasicBlock.cpp:360
LLVM_ATTRIBUTE_RETURNS_NONNULL void * Allocate(size_t Size, Align Alignment)
Allocate space at the specified alignment.
Definition: Allocator.h:148
void Deallocate(const void *Ptr, size_t Size, size_t)
Definition: Allocator.h:223
This is an important base class in LLVM.
Definition: Constant.h:41
This class represents an Operation in the Expression.
A parsed version of the target data layout string in and methods for querying it.
Definition: DataLayout.h:110
Align getABIIntegerTypeAlignment(unsigned BitWidth) const
Returns the minimum ABI-required alignment for an integer type of the specified bitwidth.
Definition: DataLayout.h:533
unsigned getPointerSize(unsigned AS=0) const
Layout pointer size in bytes, rounded up to a whole number of bytes.
Definition: DataLayout.cpp:750
Align getPointerABIAlignment(unsigned AS) const
Layout pointer alignment.
Definition: DataLayout.cpp:742
A debug info location.
Definition: DebugLoc.h:33
iterator find(const_arg_type_t< KeyT > Val)
Definition: DenseMap.h:155
bool erase(const KeyT &Val)
Definition: DenseMap.h:345
iterator end()
Definition: DenseMap.h:84
bool contains(const_arg_type_t< KeyT > Val) const
Return true if the specified key is in the map, false otherwise.
Definition: DenseMap.h:145
Implements a dense probed hash-table based set.
Definition: DenseSet.h:271
MaybeAlign getFnStackAlign() const
Return the stack alignment for the function.
Definition: Function.h:451
bool hasPersonalityFn() const
Check whether this function has a personality function.
Definition: Function.h:858
Constant * getPersonalityFn() const
Get the personality function associated with this function.
Definition: Function.cpp:1924
DenormalMode getDenormalMode(const fltSemantics &FPType) const
Returns the denormal handling type for the default rounding mode of the function.
Definition: Function.cpp:747
bool needsUnwindTableEntry() const
True if this function needs an unwind table.
Definition: Function.h:663
bool hasFnAttribute(Attribute::AttrKind Kind) const
Return true if the function has the attribute.
Definition: Function.cpp:680
bool hasMetadata() const
Return true if this value has any metadata attached to it.
Definition: Value.h:589
MDNode * getMetadata(unsigned KindID) const
Get the current metadata attachments for the given kind, if any.
Definition: Value.h:565
Module * getParent()
Get the module that this global value is contained inside of...
Definition: GlobalValue.h:655
static IntegerType * get(LLVMContext &C, unsigned NumBits)
This static method is the primary way of constructing an IntegerType.
Definition: Type.cpp:278
This class describes a target machine that is implemented with the LLVM target-independent code gener...
Context object for machine code objects.
Definition: MCContext.h:82
MCSymbol * createTempSymbol()
Create a temporary symbol with a unique name.
Definition: MCContext.cpp:331
MCSymbol * getOrCreateSymbol(const Twine &Name)
Lookup the symbol inside with the specified Name.
Definition: MCContext.cpp:211
Describe properties that are true of each instruction in the target description file.
Definition: MCInstrDesc.h:198
unsigned getNumRegs() const
Return the number of registers this target has (useful for sizing arrays holding per register informa...
Wrapper class representing physical registers. Should be passed by value.
Definition: MCRegister.h:33
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
Definition: MCSymbol.h:40
Metadata node.
Definition: Metadata.h:1067
void setBBID(const UniqueBBID &V)
Sets the fixed BBID of this basic block.
void setIsEndSection(bool V=true)
instr_iterator insert(instr_iterator I, MachineInstr *M)
Insert MI into the instruction list before I, possibly inside a bundle.
int getNumber() const
MachineBasicBlocks are uniquely numbered at the function level, unless they're not in a MachineFuncti...
const BasicBlock * getBasicBlock() const
Return the LLVM basic block that this instance corresponded to originally.
MBBSectionID getSectionID() const
Returns the section ID of this basic block.
iterator getFirstNonPHI()
Returns a pointer to the first instruction in this block that is not a PHINode instruction.
Instructions::const_iterator const_instr_iterator
const MachineFunction * getParent() const
Return the MachineFunction containing this basic block.
void setIsBeginSection(bool V=true)
This class is a data container for one entry in a MachineConstantPool.
bool needsRelocation() const
This method classifies the entry according to whether or not it may generate a relocation entry.
bool isMachineConstantPoolEntry() const
isMachineConstantPoolEntry - Return true if the MachineConstantPoolEntry is indeed a target specific ...
unsigned getSizeInBytes(const DataLayout &DL) const
union llvm::MachineConstantPoolEntry::@198 Val
The constant itself.
SectionKind getSectionKind(const DataLayout *DL) const
Abstract base class for all machine specific constantpool value subclasses.
virtual unsigned getSizeInBytes(const DataLayout &DL) const
The MachineConstantPool class keeps track of constants referenced by a function which must be spilled...
void dump() const
dump - Call print(cerr) to be called from the debugger.
void print(raw_ostream &OS) const
print - Used by the MachineFunction printer to print information about constant pool objects.
unsigned getConstantPoolIndex(const Constant *C, Align Alignment)
getConstantPoolIndex - Create a new entry in the constant pool or return an existing one.
The MachineFrameInfo class represents an abstract stack frame until prolog/epilog code is inserted.
void ensureMaxAlignment(Align Alignment)
Make sure the function is at least Align bytes aligned.
void print(const MachineFunction &MF, raw_ostream &OS) const
Used by the MachineFunction printer to print information about stack objects.
void setUnsafeStackSize(uint64_t Size)
void print(raw_ostream &OS) const
Print the MachineFunctionProperties in human-readable form.
MachineFunctionProperties & set(Property P)
MachineFunctionProperties & reset(Property P)
virtual void MF_HandleChangeDesc(MachineInstr &MI, const MCInstrDesc &TID)
Callback before changing MCInstrDesc.
virtual void MF_HandleRemoval(MachineInstr &MI)=0
Callback before a removal. This should not modify the MI directly.
virtual void MF_HandleInsertion(MachineInstr &MI)=0
Callback after an insertion. This should not modify the MI directly.
MachineInstr::ExtraInfo * createMIExtraInfo(ArrayRef< MachineMemOperand * > MMOs, MCSymbol *PreInstrSymbol=nullptr, MCSymbol *PostInstrSymbol=nullptr, MDNode *HeapAllocMarker=nullptr, MDNode *PCSections=nullptr, uint32_t CFIType=0, MDNode *MMRAs=nullptr)
Allocate and construct an extra info structure for a MachineInstr.
int getFilterIDFor(ArrayRef< unsigned > TyIds)
Return the id of the filter encoded by TyIds. This is function wide.
bool UseDebugInstrRef
Flag for whether this function contains DBG_VALUEs (false) or DBG_INSTR_REF (true).
std::pair< unsigned, unsigned > DebugInstrOperandPair
Pair of instruction number and operand number.
unsigned addFrameInst(const MCCFIInstruction &Inst)
bool useDebugInstrRef() const
Returns true if the function's variable locations are tracked with instruction referencing.
SmallVector< DebugSubstitution, 8 > DebugValueSubstitutions
Debug value substitutions: a collection of DebugSubstitution objects, recording changes in where a va...
unsigned getFunctionNumber() const
getFunctionNumber - Return a unique ID for the current function.
MCSymbol * getPICBaseSymbol() const
getPICBaseSymbol - Return a function-local symbol to represent the PIC base.
void viewCFGOnly() const
viewCFGOnly - This function is meant for use from the debugger.
ArrayRef< int > allocateShuffleMask(ArrayRef< int > Mask)
void substituteDebugValuesForInst(const MachineInstr &Old, MachineInstr &New, unsigned MaxOperand=UINT_MAX)
Create substitutions for any tracked values in Old, to point at New.
const TargetSubtargetInfo & getSubtarget() const
getSubtarget - Return the subtarget for which this machine code is being compiled.
MachineInstr & cloneMachineInstrBundle(MachineBasicBlock &MBB, MachineBasicBlock::iterator InsertBefore, const MachineInstr &Orig)
Clones instruction or the whole instruction bundle Orig and insert into MBB before InsertBefore.
MachineJumpTableInfo * getOrCreateJumpTableInfo(unsigned JTEntryKind)
getOrCreateJumpTableInfo - Get the JumpTableInfo for this function, if it does already exist,...
StringRef getName() const
getName - Return the name of the corresponding LLVM function.
void dump() const
dump - Print the current MachineFunction to cerr, useful for debugger use.
MachineInstr * CreateMachineInstr(const MCInstrDesc &MCID, DebugLoc DL, bool NoImplicit=false)
CreateMachineInstr - Allocate a new MachineInstr.
void makeDebugValueSubstitution(DebugInstrOperandPair, DebugInstrOperandPair, unsigned SubReg=0)
Create a substitution between one <instr,operand> value to a different, new value.
MachineMemOperand * getMachineMemOperand(MachinePointerInfo PtrInfo, MachineMemOperand::Flags f, LLT MemTy, Align base_alignment, const AAMDNodes &AAInfo=AAMDNodes(), const MDNode *Ranges=nullptr, SyncScope::ID SSID=SyncScope::System, AtomicOrdering Ordering=AtomicOrdering::NotAtomic, AtomicOrdering FailureOrdering=AtomicOrdering::NotAtomic)
getMachineMemOperand - Allocate a new MachineMemOperand.
bool needsFrameMoves() const
True if this function needs frame moves for debug or exceptions.
unsigned getTypeIDFor(const GlobalValue *TI)
Return the type id for the specified typeinfo. This is function wide.
void finalizeDebugInstrRefs()
Finalise any partially emitted debug instructions.
void deallocateOperandArray(OperandCapacity Cap, MachineOperand *Array)
Dellocate an array of MachineOperands and recycle the memory.
DenormalMode getDenormalMode(const fltSemantics &FPType) const
Returns the denormal handling type for the default rounding mode of the function.
void copyCallSiteInfo(const MachineInstr *Old, const MachineInstr *New)
Copy the call site info from Old to \ New.
void deleteMachineInstr(MachineInstr *MI)
DeleteMachineInstr - Delete the given MachineInstr.
void initTargetMachineFunctionInfo(const TargetSubtargetInfo &STI)
Initialize the target specific MachineFunctionInfo.
const char * createExternalSymbolName(StringRef Name)
Allocate a string and populate it with the given external symbol name.
uint32_t * allocateRegMask()
Allocate and initialize a register mask with NumRegister bits.
MCSymbol * getJTISymbol(unsigned JTI, MCContext &Ctx, bool isLinkerPrivate=false) const
getJTISymbol - Return the MCSymbol for the specified non-empty jump table.
void setCallSiteLandingPad(MCSymbol *Sym, ArrayRef< unsigned > Sites)
Map the landing pad's EH symbol to the call site indexes.
void setUseDebugInstrRef(bool UseInstrRef)
Set whether this function will use instruction referencing or not.
MCContext & getContext() const
LandingPadInfo & getOrCreateLandingPadInfo(MachineBasicBlock *LandingPad)
Find or create an LandingPadInfo for the specified MachineBasicBlock.
unsigned size() const
MachineRegisterInfo & getRegInfo()
getRegInfo - Return information about the registers currently in use.
const DataLayout & getDataLayout() const
Return the DataLayout attached to the Module associated to this MF.
MCSymbol * addLandingPad(MachineBasicBlock *LandingPad)
Add a new panding pad, and extract the exception handling information from the landingpad instruction...
unsigned DebugInstrNumberingCount
A count of how many instructions in the function have had numbers assigned to them.
void deleteMachineBasicBlock(MachineBasicBlock *MBB)
DeleteMachineBasicBlock - Delete the given MachineBasicBlock.
void handleChangeDesc(MachineInstr &MI, const MCInstrDesc &TID)
static const unsigned int DebugOperandMemNumber
A reserved operand number representing the instructions memory operand, for instructions that have a ...
Function & getFunction()
Return the LLVM function that this machine code represents.
const LLVMTargetMachine & getTarget() const
getTarget - Return the target machine this machine code is compiled with
DebugInstrOperandPair salvageCopySSAImpl(MachineInstr &MI)
const MachineBasicBlock & back() const
MachineModuleInfo & getMMI() const
BasicBlockListType::iterator iterator
void setDebugInstrNumberingCount(unsigned Num)
Set value of DebugInstrNumberingCount field.
bool shouldSplitStack() const
Should we be emitting segmented stack stuff for the function.
void viewCFG() const
viewCFG - This function is meant for use from the debugger.
bool shouldUseDebugInstrRef() const
Determine whether, in the current machine configuration, we should use instruction referencing or not...
const MachineFunctionProperties & getProperties() const
Get the function properties.
MachineInstr * CloneMachineInstr(const MachineInstr *Orig)
Create a new MachineInstr which is a copy of Orig, identical in all ways except the instruction has n...
void eraseCallSiteInfo(const MachineInstr *MI)
Following functions update call site info.
void RenumberBlocks(MachineBasicBlock *MBBFrom=nullptr)
RenumberBlocks - This discards all of the MachineBasicBlock numbers and recomputes them.
const MachineBasicBlock & front() const
Register addLiveIn(MCRegister PReg, const TargetRegisterClass *RC)
addLiveIn - Add the specified physical register as a live-in value and create a corresponding virtual...
void moveCallSiteInfo(const MachineInstr *Old, const MachineInstr *New)
Move the call site info from Old to \New call site info.
void print(raw_ostream &OS, const SlotIndexes *=nullptr) const
print - Print out the MachineFunction in a format suitable for debugging to the specified stream.
void addInvoke(MachineBasicBlock *LandingPad, MCSymbol *BeginLabel, MCSymbol *EndLabel)
Provide the begin and end labels of an invoke style call and associate it with a try landing pad bloc...
MachineBasicBlock * CreateMachineBasicBlock(const BasicBlock *BB=nullptr, std::optional< UniqueBBID > BBID=std::nullopt)
CreateMachineBasicBlock - Allocate a new MachineBasicBlock.
VariableDbgInfoMapTy VariableDbgInfos
void assignBeginEndSections()
Assign IsBeginSection IsEndSection fields for basic blocks in this function.
MachineFunction(Function &F, const LLVMTargetMachine &Target, const TargetSubtargetInfo &STI, unsigned FunctionNum, MachineModuleInfo &MMI)
DebugInstrOperandPair salvageCopySSA(MachineInstr &MI, DenseMap< Register, DebugInstrOperandPair > &DbgPHICache)
Find the underlying defining instruction / operand for a COPY instruction while in SSA form.
Representation of each machine instruction.
Definition: MachineInstr.h:69
void bundleWithPred()
Bundle this instruction with its predecessor.
bool isCopyLike() const
Return true if the instruction behaves like a copy.
unsigned getNumOperands() const
Retuns the total number of operands.
Definition: MachineInstr.h:569
unsigned peekDebugInstrNum() const
Examine the instruction number of this MachineInstr.
Definition: MachineInstr.h:542
bool shouldUpdateCallSiteInfo() const
Return true if copying, moving, or erasing this instruction requires updating Call Site Info (see cop...
unsigned getDebugInstrNum()
Fetch the instruction number of this MachineInstr.
const MachineOperand & getOperand(unsigned i) const
Definition: MachineInstr.h:576
iterator_range< filtered_mop_iterator > all_defs()
Returns an iterator range over all operands that are (explicit or implicit) register defs.
Definition: MachineInstr.h:753
bool RemoveMBBFromJumpTables(MachineBasicBlock *MBB)
RemoveMBBFromJumpTables - If MBB is present in any jump tables, remove it.
bool ReplaceMBBInJumpTables(MachineBasicBlock *Old, MachineBasicBlock *New)
ReplaceMBBInJumpTables - If Old is the target of any jump tables, update the jump tables to branch to...
void print(raw_ostream &OS) const
print - Used by the MachineFunction printer to print information about jump tables.
unsigned getEntrySize(const DataLayout &TD) const
getEntrySize - Return the size of each entry in the jump table.
unsigned createJumpTableIndex(const std::vector< MachineBasicBlock * > &DestBBs)
createJumpTableIndex - Create a new jump table.
void dump() const
dump - Call to stderr.
bool ReplaceMBBInJumpTable(unsigned Idx, MachineBasicBlock *Old, MachineBasicBlock *New)
ReplaceMBBInJumpTable - If Old is a target of the jump tables, update the jump table to branch to New...
JTEntryKind
JTEntryKind - This enum indicates how each entry of the jump table is represented and emitted.
@ EK_GPRel32BlockAddress
EK_GPRel32BlockAddress - Each entry is an address of block, encoded with a relocation as gp-relative,...
@ EK_Inline
EK_Inline - Jump table entries are emitted inline at their point of use.
@ EK_LabelDifference32
EK_LabelDifference32 - Each entry is the address of the block minus the address of the jump table.
@ EK_Custom32
EK_Custom32 - Each entry is a 32-bit value that is custom lowered by the TargetLowering::LowerCustomJ...
@ EK_LabelDifference64
EK_LabelDifference64 - Each entry is the address of the block minus the address of the jump table.
@ EK_BlockAddress
EK_BlockAddress - Each entry is a plain address of block, e.g.: .word LBB123.
@ EK_GPRel64BlockAddress
EK_GPRel64BlockAddress - Each entry is an address of block, encoded with a relocation as gp-relative,...
unsigned getEntryAlignment(const DataLayout &TD) const
getEntryAlignment - Return the alignment of each entry in the jump table.
JTEntryKind getEntryKind() const
A description of a memory reference used in the backend.
LocationSize getSize() const
Return the size in bytes of the memory reference.
AtomicOrdering getFailureOrdering() const
For cmpxchg atomic operations, return the atomic ordering requirements when store does not occur.
const PseudoSourceValue * getPseudoValue() const
const MDNode * getRanges() const
Return the range tag for the memory reference.
SyncScope::ID getSyncScopeID() const
Returns the synchronization scope ID for this memory operation.
Flags
Flags values. These may be or'd together.
AtomicOrdering getSuccessOrdering() const
Return the atomic ordering requirements for this memory operation.
const MachinePointerInfo & getPointerInfo() const
Flags getFlags() const
Return the raw flags of the source value,.
AAMDNodes getAAInfo() const
Return the AA tags for the memory reference.
const Value * getValue() const
Return the base address of the memory access.
Align getBaseAlign() const
Return the minimum known alignment in bytes of the base address, without the offset.
int64_t getOffset() const
For normal values, this is a byte offset added to the base address.
This class contains meta information specific to a module.
bool hasDebugInfo() const
Returns true if valid debug info is present.
MachineOperand class - Representation of each machine instruction operand.
static unsigned getRegMaskSize(unsigned NumRegs)
Returns number of elements needed for a regmask array.
Register getReg() const
getReg - Returns the register number.
MachineRegisterInfo - Keep track of information for virtual and physical registers,...
def_instr_iterator def_instr_begin(Register RegNo) const
std::vector< std::pair< MCRegister, Register > >::const_iterator livein_iterator
bool hasOneDef(Register RegNo) const
Return true if there is exactly one operand defining the specified register.
livein_iterator livein_end() const
livein_iterator livein_begin() const
Manage lifetime of a slot tracker for printing IR.
void incorporateFunction(const Function &F)
Incorporate the given function.
Definition: AsmWriter.cpp:902
const DataLayout & getDataLayout() const
Get the data layout for the module's target platform.
Definition: Module.h:293
bool isNull() const
Test if the pointer held in the union is null, regardless of which type it is.
Definition: PointerUnion.h:142
Simple wrapper around std::function<void(raw_ostream&)>.
Definition: Printable.h:38
Wrapper class representing virtual and physical registers.
Definition: Register.h:19
SectionKind - This is a simple POD value that classifies the properties of a section.
Definition: SectionKind.h:22
static SectionKind getMergeableConst4()
Definition: SectionKind.h:202
static SectionKind getReadOnlyWithRel()
Definition: SectionKind.h:214
static SectionKind getMergeableConst8()
Definition: SectionKind.h:203
static SectionKind getMergeableConst16()
Definition: SectionKind.h:204
static SectionKind getReadOnly()
Definition: SectionKind.h:192
static SectionKind getMergeableConst32()
Definition: SectionKind.h:205
SlotIndexes pass.
Definition: SlotIndexes.h:300
SmallString - A SmallString is just a SmallVector with methods and accessors that make it work better...
Definition: SmallString.h:26
void push_back(const T &Elt)
Definition: SmallVector.h:426
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
Definition: SmallVector.h:1209
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
bool isStackRealignable() const
isStackRealignable - This method returns whether the stack can be realigned.
Align getStackAlign() const
getStackAlignment - This method returns the number of bytes to which the stack pointer must be aligne...
TargetInstrInfo - Interface to description of machine instruction set.
Align getPrefFunctionAlignment() const
Return the preferred function alignment.
Align getMinFunctionAlignment() const
Return the minimum function alignment.
TargetOptions Options
unsigned ForceDwarfFrameSection
Emit DWARF debug frame section.
bool contains(Register Reg) const
Return true if the specified register is included in this register class.
bool hasSubClassEq(const TargetRegisterClass *RC) const
Returns true if RC is a sub-class of or equal to this class.
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
TargetSubtargetInfo - Generic base class for all target subtargets.
virtual const TargetRegisterInfo * getRegisterInfo() const
getRegisterInfo - If register information is available, return it.
virtual const TargetFrameLowering * getFrameLowering() const
virtual const TargetInstrInfo * getInstrInfo() const
virtual const TargetLowering * getTargetLowering() const
Target - Wrapper for Target specific information.
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
Definition: Twine.h:81
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:45
A Use represents the edge between a Value definition and its users.
Definition: Use.h:43
LLVM Value Representation.
Definition: Value.h:74
const Value * stripPointerCasts() const
Strip off pointer casts, all-zero GEPs and address space casts.
Definition: Value.cpp:693
StringRef getName() const
Return a constant reference to the value's name.
Definition: Value.cpp:309
self_iterator getIterator()
Definition: ilist_node.h:109
iterator erase(iterator where)
Definition: ilist.h:204
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
A raw_ostream that writes to an std::string.
Definition: raw_ostream.h:661
A raw_ostream that writes to an SmallVector or SmallString.
Definition: raw_ostream.h:691
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
@ C
The default llvm calling convention, compatible with C.
Definition: CallingConv.h:34
initializer< Ty > init(const Ty &Val)
Definition: CommandLine.h:450
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
@ Offset
Definition: DWP.cpp:456
MachineBasicBlock::instr_iterator getBundleStart(MachineBasicBlock::instr_iterator I)
Returns an iterator to the first instruction in the bundle containing I.
MachineInstrBuilder BuildMI(MachineFunction &MF, const MIMetadata &MIMD, const MCInstrDesc &MCID)
Builder interface. Specify how to create the initial instruction itself.
iterator_range< T > make_range(T x, T y)
Convenience function for iterating over sub-ranges.
void append_range(Container &C, Range &&R)
Wrapper function to append range R to container C.
Definition: STLExtras.h:2067
MaybeAlign getAlign(const Function &F, unsigned Index)
Printable printJumpTableEntryReference(unsigned Idx)
Prints a jump table entry reference.
bool isScopedEHPersonality(EHPersonality Pers)
Returns true if this personality uses scope-style EH IR instructions: catchswitch,...
auto reverse(ContainerTy &&C)
Definition: STLExtras.h:419
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:163
MachineBasicBlock::instr_iterator getBundleEnd(MachineBasicBlock::instr_iterator I)
Returns an iterator pointing beyond the bundle containing I.
Constant * ConstantFoldCastOperand(unsigned Opcode, Constant *C, Type *DestTy, const DataLayout &DL)
Attempt to constant fold a cast with the specified operand.
EHPersonality classifyEHPersonality(const Value *Pers)
See if the given exception handling personality function is one that we understand.
raw_fd_ostream & errs()
This returns a reference to a raw_ostream for standard error.
AtomicOrdering
Atomic ordering for LLVM's memory model.
bool isFuncletEHPersonality(EHPersonality Pers)
Returns true if this is a personality function that invokes handler funclets (which must return to it...
void ViewGraph(const GraphType &G, const Twine &Name, bool ShortNames=false, const Twine &Title="", GraphProgram::Name Program=GraphProgram::DOT)
ViewGraph - Emit a dot graph, run 'dot', run gv on the postscript file, then cleanup.
Definition: GraphWriter.h:427
OutputIt copy(R &&Range, OutputIt Out)
Definition: STLExtras.h:1824
Align commonAlignment(Align A, uint64_t Offset)
Returns the alignment that satisfies both alignments.
Definition: Alignment.h:212
Printable printReg(Register Reg, const TargetRegisterInfo *TRI=nullptr, unsigned SubIdx=0, const MachineRegisterInfo *MRI=nullptr)
Prints virtual and physical registers with or without a TRI instance.
Printable printMBBReference(const MachineBasicBlock &MBB)
Prints a machine basic block reference.
bool debuginfoShouldUseDebugInstrRef(const Triple &T)
#define N
A collection of metadata nodes that might be associated with a memory access used by the alias-analys...
Definition: Metadata.h:760
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:39
uint64_t value() const
This is a hole in the type system and should not be abused.
Definition: Alignment.h:85
std::string getNodeLabel(const MachineBasicBlock *Node, const MachineFunction *Graph)
static std::string getGraphName(const MachineFunction *F)
DOTGraphTraits - Template class that can be specialized to customize how graphs are converted to 'dot...
DefaultDOTGraphTraits - This class provides the default implementations of all of the DOTGraphTraits ...
Represent subnormal handling kind for floating point instruction inputs and outputs.
This structure is used to retain landing pad info for the current function.
SmallVector< MCSymbol *, 1 > EndLabels
MachineBasicBlock * LandingPadBlock
SmallVector< MCSymbol *, 1 > BeginLabels
std::vector< int > TypeIds
MachineJumpTableEntry - One jump table in the jump table info.
std::vector< MachineBasicBlock * > MBBs
MBBs - The vector of basic blocks from which to create the jump table.
This class contains a discriminated union of information about pointers in memory operands,...
PointerUnion< const Value *, const PseudoSourceValue * > V
This is the IR pointer value for the access, or it is null if unknown.
MachinePointerInfo getWithOffset(int64_t O) const
static void deleteNode(NodeTy *V)
Definition: ilist.h:42