75#define DEBUG_TYPE "globalopt"
77STATISTIC(NumMarked ,
"Number of globals marked constant");
78STATISTIC(NumUnnamed ,
"Number of globals marked unnamed_addr");
79STATISTIC(NumSRA ,
"Number of aggregate globals broken into scalars");
80STATISTIC(NumSubstitute,
"Number of globals with initializers stored into them");
82STATISTIC(NumGlobUses ,
"Number of global uses devirtualized");
83STATISTIC(NumLocalized ,
"Number of globals localized");
84STATISTIC(NumShrunkToBool ,
"Number of global vars shrunk to booleans");
85STATISTIC(NumFastCallFns ,
"Number of functions converted to fastcc");
86STATISTIC(NumCtorsEvaluated,
"Number of static ctors evaluated");
87STATISTIC(NumNestRemoved ,
"Number of nest attributes removed");
88STATISTIC(NumAliasesResolved,
"Number of global aliases resolved");
89STATISTIC(NumAliasesRemoved,
"Number of global aliases eliminated");
90STATISTIC(NumCXXDtorsRemoved,
"Number of global C++ destructors removed");
91STATISTIC(NumInternalFunc,
"Number of internal functions");
92STATISTIC(NumColdCC,
"Number of functions marked coldcc");
96 cl::desc(
"Enable stress test of coldcc by adding "
97 "calling conv to all internal functions."),
103 "Maximum block frequency, expressed as a percentage of caller's "
104 "entry frequency, for a call site to be considered cold for enabling"
126 Type *Ty = Types.pop_back_val();
133 if (cast<VectorType>(Ty)->getElementType()->isPointerTy())
137 Types.push_back(cast<ArrayType>(Ty)->getElementType());
143 if (isa<PointerType>(InnerTy))
return true;
144 if (isa<StructType>(InnerTy) || isa<ArrayType>(InnerTy) ||
145 isa<VectorType>(InnerTy))
146 Types.push_back(InnerTy);
151 if (--Limit == 0)
return true;
152 }
while (!Types.empty());
162 if (isa<Constant>(V))
166 if (isa<LoadInst>(V) || isa<InvokeInst>(V) || isa<Argument>(V) ||
173 if (
I->mayHaveSideEffects())
176 if (!
GEP->hasAllConstantIndices())
178 }
else if (
I->getNumOperands() != 1) {
182 V =
I->getOperand(0);
201 bool Changed =
false;
209 while (!Worklist.
empty()) {
212 Value *V =
SI->getValueOperand();
213 if (isa<Constant>(V)) {
215 SI->eraseFromParent();
218 Dead.push_back(std::make_pair(
I,
SI));
220 }
else if (
MemSetInst *MSI = dyn_cast<MemSetInst>(U)) {
221 if (isa<Constant>(MSI->getValue())) {
223 MSI->eraseFromParent();
224 }
else if (
Instruction *
I = dyn_cast<Instruction>(MSI->getValue())) {
226 Dead.push_back(std::make_pair(
I, MSI));
229 GlobalVariable *MemSrc = dyn_cast<GlobalVariable>(MTI->getSource());
232 MTI->eraseFromParent();
233 }
else if (
Instruction *
I = dyn_cast<Instruction>(MTI->getSource())) {
235 Dead.push_back(std::make_pair(
I, MTI));
237 }
else if (
ConstantExpr *CE = dyn_cast<ConstantExpr>(U)) {
238 if (isa<GEPOperator>(CE))
243 for (
int i = 0, e = Dead.size(); i != e; ++i) {
245 Dead[i].second->eraseFromParent();
250 Instruction *J = dyn_cast<Instruction>(
I->getOperand(0));
253 I->eraseFromParent();
256 I->eraseFromParent();
273 bool Changed =
false;
277 for (
Value *Op :
I->operands())
278 if (
auto *OpI = dyn_cast<Instruction>(Op))
280 I->eraseFromParent();
283 while (!WorkList.
empty()) {
285 if (!Visited.
insert(U).second)
288 if (
auto *BO = dyn_cast<BitCastOperator>(U))
290 if (
auto *ASC = dyn_cast<AddrSpaceCastOperator>(U))
292 else if (
auto *
GEP = dyn_cast<GEPOperator>(U))
294 else if (
auto *LI = dyn_cast<LoadInst>(U)) {
297 Type *Ty = LI->getType();
299 LI->replaceAllUsesWith(Res);
304 Value *PtrOp = LI->getPointerOperand();
314 }
else if (
StoreInst *
SI = dyn_cast<StoreInst>(U)) {
344 auto AppendUses = [&](
Value *V) {
345 for (
Use &U : V->uses())
346 if (Visited.
insert(&U).second)
350 while (!Worklist.
empty()) {
352 User *V = U->getUser();
354 auto *
GEP = dyn_cast<GEPOperator>(V);
355 if (isa<BitCastOperator>(V) || isa<AddrSpaceCastOperator>(V) ||
356 (
GEP &&
GEP->hasAllConstantIndices())) {
364 if (isa<StoreInst>(V) && U->getOperandNo() == 0)
370 if (
Ptr != GV ||
Offset.getActiveBits() >= 64)
376 const auto &[It, Inserted] =
378 if (Ty != It->second.Ty)
382 It->second.Initializer =
384 if (!It->second.Initializer) {
385 LLVM_DEBUG(
dbgs() <<
"Global SRA: Failed to evaluate initializer of "
386 << *GV <<
" with type " << *Ty <<
" at offset "
387 <<
Offset.getZExtValue());
393 if (isa<ScalableVectorType>(Ty))
397 auto *
SI = dyn_cast<StoreInst>(V);
401 Constant *StoredConst = dyn_cast<Constant>(
SI->getOperand(0));
406 return Initializer != StoredConst;
409 It->second.IsLoaded |= isa<LoadInst>(V);
410 It->second.IsStored |= IsStored(V, It->second.Initializer);
415 if (
auto *
C = dyn_cast<Constant>(V)) {
435 for (
auto *GVE : GVs) {
438 int64_t CurVarOffsetInBytes = 0;
440 uint64_t FragmentEndInBits = FragmentOffsetInBits + FragmentSizeInBits;
447 if (CurVarOffsetInBytes < 0)
451 CurVarOffsetInBits = CHAR_BIT * (
uint64_t)CurVarOffsetInBytes;
454 if (CurVarOffsetInBits >= FragmentEndInBits)
458 uint64_t CurVarEndInBits = CurVarOffsetInBits + CurVarSize;
460 if (CurVarSize != 0 &&
461 CurVarEndInBits <= FragmentOffsetInBits)
466 if (CurVarSize != 0 &&
467 CurVarOffsetInBits >= FragmentOffsetInBits &&
468 CurVarEndInBits <= FragmentEndInBits) {
470 (CurVarOffsetInBits - FragmentOffsetInBits) / 8;
471 if (CurVarOffsetInFragment != 0)
472 Expr = DIExpression::get(Expr->
getContext(), {dwarf::DW_OP_plus_uconst,
473 CurVarOffsetInFragment});
475 Expr = DIExpression::get(Expr->
getContext(), {});
477 DIGlobalVariableExpression::get(GVE->getContext(), Var, Expr);
483 if (FragmentSizeInBits < VarSize) {
484 if (CurVarOffsetInBits > FragmentOffsetInBits)
486 uint64_t CurVarFragmentOffsetInBits =
487 FragmentOffsetInBits - CurVarOffsetInBits;
488 uint64_t CurVarFragmentSizeInBits = FragmentSizeInBits;
489 if (CurVarSize != 0 && CurVarEndInBits < FragmentEndInBits)
490 CurVarFragmentSizeInBits -= (FragmentEndInBits - CurVarEndInBits);
491 if (CurVarOffsetInBits)
492 Expr = DIExpression::get(Expr->
getContext(), {});
494 Expr, CurVarFragmentOffsetInBits, CurVarFragmentSizeInBits))
499 auto *NGVE = DIGlobalVariableExpression::get(GVE->getContext(), Var, Expr);
524 unsigned NumParts =
count_if(Parts, [](
const auto &Pair) {
525 return Pair.second.IsLoaded && Pair.second.IsStored;
532 for (
const auto &Pair : Parts) {
534 {Pair.first, Pair.second.Ty, Pair.second.Initializer});
540 for (
const auto &[OffsetForTy, Ty,
_] : TypesVector) {
545 Offset = OffsetForTy +
DL.getTypeAllocSize(Ty);
552 LLVM_DEBUG(
dbgs() <<
"PERFORMING GLOBAL SRA ON: " << *GV <<
"\n");
555 Align StartAlignment =
561 unsigned NameSuffix = 0;
562 for (
auto &[OffsetForTy, Ty, Initializer] : TypesVector) {
564 *GV->
getParent(), Ty,
false, GlobalVariable::InternalLinkage,
565 Initializer, GV->
getName() +
"." +
Twine(NameSuffix++), GV,
568 NewGlobals.
insert({OffsetForTy, NGV});
574 if (NewAlign >
DL.getABITypeAlign(Ty))
579 DL.getTypeAllocSizeInBits(Ty), VarSize);
586 auto AppendUsers = [&](
Value *V) {
587 for (
User *U : V->users())
588 if (Visited.
insert(U).second)
592 while (!Worklist.
empty()) {
594 if (isa<BitCastOperator>(V) || isa<AddrSpaceCastOperator>(V) ||
595 isa<GEPOperator>(V)) {
597 if (isa<Instruction>(V))
606 assert(
Ptr == GV &&
"Load/store must be from/to global");
608 assert(NGV &&
"Must have replacement global for this offset");
615 if (
auto *LI = dyn_cast<LoadInst>(V)) {
616 LI->setOperand(0, NGV);
617 LI->setAlignment(NewAlign);
619 auto *
SI = cast<StoreInst>(V);
620 SI->setOperand(1, NGV);
621 SI->setAlignment(NewAlign);
627 "Other users can only be dead constants");
637 return NewGlobals.
begin()->second;
645 for (
const User *U : V->users()) {
652 if (isa<LoadInst>(U)) {
654 }
else if (
const StoreInst *
SI = dyn_cast<StoreInst>(U)) {
655 if (
SI->getOperand(0) == V) {
658 }
else if (
const CallInst *CI = dyn_cast<CallInst>(U)) {
659 if (CI->getCalledOperand() != V) {
662 }
else if (
const InvokeInst *II = dyn_cast<InvokeInst>(U)) {
663 if (II->getCalledOperand() != V) {
666 }
else if (
const BitCastInst *CI = dyn_cast<BitCastInst>(U)) {
673 }
else if (
const PHINode *PN = dyn_cast<PHINode>(U)) {
678 }
else if (isa<ICmpInst>(U) &&
679 !ICmpInst::isSigned(cast<ICmpInst>(U)->getPredicate()) &&
680 isa<LoadInst>(U->getOperand(0)) &&
681 isa<ConstantPointerNull>(U->getOperand(1))) {
682 assert(isa<GlobalValue>(cast<LoadInst>(U->getOperand(0))
683 ->getPointerOperand()
684 ->stripPointerCasts()) &&
685 "Should be GlobalVariable");
702 while (!Worklist.
empty()) {
704 for (
const auto *U :
P->users()) {
705 if (
auto *LI = dyn_cast<LoadInst>(U)) {
709 }
else if (
auto *
SI = dyn_cast<StoreInst>(U)) {
711 if (
SI->getPointerOperand() !=
P)
713 }
else if (
auto *CE = dyn_cast<ConstantExpr>(U)) {
714 if (CE->stripPointerCasts() != GV)
733 while (!Worklist.
empty()) {
735 for (
auto *U :
P->users()) {
736 if (
auto *CE = dyn_cast<ConstantExpr>(U)) {
741 assert((isa<LoadInst>(U) || isa<StoreInst>(U)) &&
742 "Expect only load or store instructions");
749 bool Changed =
false;
750 for (
auto UI = V->user_begin(),
E = V->user_end(); UI !=
E; ) {
756 if (
LoadInst *LI = dyn_cast<LoadInst>(
I)) {
757 LI->setOperand(0, NewV);
760 if (
SI->getOperand(1) == V) {
761 SI->setOperand(1, NewV);
764 }
else if (isa<CallInst>(
I) || isa<InvokeInst>(
I)) {
771 bool PassedAsArg =
false;
772 for (
unsigned i = 0, e = CB->
arg_size(); i != e; ++i)
780 UI = V->user_begin();
783 }
else if (
CastInst *CI = dyn_cast<CastInst>(
I)) {
787 if (CI->use_empty()) {
789 CI->eraseFromParent();
794 Idxs.
reserve(GEPI->getNumOperands()-1);
797 if (
Constant *
C = dyn_cast<Constant>(*i))
801 if (Idxs.
size() == GEPI->getNumOperands()-1)
805 if (GEPI->use_empty()) {
807 GEPI->eraseFromParent();
822 bool Changed =
false;
826 bool AllNonStoreUsesGone =
true;
830 if (
LoadInst *LI = dyn_cast<LoadInst>(GlobalUser)) {
833 if (LI->use_empty()) {
834 LI->eraseFromParent();
837 AllNonStoreUsesGone =
false;
839 }
else if (isa<StoreInst>(GlobalUser)) {
841 assert(GlobalUser->getOperand(1) == GV &&
842 "Must be storing *to* the global");
844 AllNonStoreUsesGone =
false;
848 assert((isa<PHINode>(GlobalUser) || isa<SelectInst>(GlobalUser) ||
849 isa<ConstantExpr>(GlobalUser) || isa<CmpInst>(GlobalUser) ||
850 isa<BitCastInst>(GlobalUser) ||
851 isa<GetElementPtrInst>(GlobalUser) ||
852 isa<AddrSpaceCastInst>(GlobalUser)) &&
853 "Only expect load and stores!");
858 LLVM_DEBUG(
dbgs() <<
"OPTIMIZED LOADS FROM STORED ONCE POINTER: " << *GV
865 if (AllNonStoreUsesGone) {
889 I->replaceAllUsesWith(NewC);
893 while (UI !=
E && *UI ==
I)
896 I->eraseFromParent();
910 LLVM_DEBUG(
errs() <<
"PROMOTING GLOBAL: " << *GV <<
" CALL = " << *CI
929 if (!isa<UndefValue>(InitVal)) {
932 Builder.CreateMemSet(NewGV, InitVal, AllocSize, std::nullopt);
940 if (BCI->getType() == NewGV->
getType()) {
941 BCI->replaceAllUsesWith(NewGV);
942 BCI->eraseFromParent();
944 BCI->setOperand(0, NewGV);
963 bool InitBoolUsed =
false;
968 for (
auto *U : Guses) {
974 !isa<ConstantPointerNull>(
SI->getValueOperand())),
975 InitBool,
false,
Align(1),
SI->getOrdering(),
976 SI->getSyncScopeID(),
SI);
977 SI->eraseFromParent();
999 case ICmpInst::ICMP_ULT:
1002 case ICmpInst::ICMP_UGE:
1005 case ICmpInst::ICMP_ULE:
1006 case ICmpInst::ICMP_EQ:
1009 case ICmpInst::ICMP_NE:
1010 case ICmpInst::ICMP_UGT:
1020 if (!InitBoolUsed) {
1022 cast<StoreInst>(InitBool->
user_back())->eraseFromParent();
1034 for (
auto *CE : RepValues)
1050 while (!Worklist.
empty()) {
1052 if (!Visited.
insert(V).second)
1055 for (
const Use &VUse : V->uses()) {
1056 const User *U = VUse.getUser();
1057 if (isa<LoadInst>(U) || isa<CmpInst>(U))
1060 if (
auto *
SI = dyn_cast<StoreInst>(U)) {
1061 if (
SI->getValueOperand() == V &&
1062 SI->getPointerOperand()->stripPointerCasts() != GV)
1067 if (
auto *BCI = dyn_cast<BitCastInst>(U)) {
1072 if (
auto *GEPI = dyn_cast<GetElementPtrInst>(U)) {
1109 if (AllocSize >= 2048)
1151 if (
Constant *SOVC = dyn_cast<Constant>(StoredOnceVal)) {
1156 if (
auto *CI = dyn_cast<CallInst>(StoredOnceVal)) {
1157 auto *TLI = &GetTLI(*CI->getFunction());
1187 if (!isa<LoadInst>(U) && !isa<StoreInst>(U))
1208 "No reason to shrink to bool!");
1215 bool IsOneZero =
false;
1216 bool EmitOneOrZero =
true;
1217 auto *CI = dyn_cast<ConstantInt>(OtherVal);
1218 if (CI && CI->getValue().getActiveBits() <= 64) {
1219 IsOneZero = InitVal->
isNullValue() && CI->isOne();
1222 if (CIInit && CIInit->getValue().getActiveBits() <= 64) {
1223 uint64_t ValInit = CIInit->getZExtValue();
1224 uint64_t ValOther = CI->getZExtValue();
1225 uint64_t ValMinus = ValOther - ValInit;
1227 for(
auto *GVe : GVs){
1231 unsigned SizeInOctets =
1243 dwarf::DW_OP_deref_size, SizeInOctets,
1244 dwarf::DW_OP_constu, ValMinus,
1245 dwarf::DW_OP_mul, dwarf::DW_OP_constu, ValInit,
1247 bool WithStackValue =
true;
1250 DIGlobalVariableExpression::get(NewGV->
getContext(), DGV,
E);
1253 EmitOneOrZero =
false;
1257 if (EmitOneOrZero) {
1268 bool StoringOther =
SI->getOperand(0) == OtherVal;
1271 if (StoringOther ||
SI->getOperand(0) == InitVal) {
1278 Instruction *StoredVal = cast<Instruction>(
SI->getOperand(0));
1283 if (
LoadInst *LI = dyn_cast<LoadInst>(StoredVal)) {
1284 assert(LI->getOperand(0) == GV &&
"Not a copy!");
1288 LI->getOrdering(), LI->getSyncScopeID(), LI);
1290 assert((isa<CastInst>(StoredVal) || isa<SelectInst>(StoredVal)) &&
1291 "This is not a form that we understand!");
1293 assert(isa<LoadInst>(StoreVal) &&
"Not a load of NewGV!");
1298 SI->getSyncScopeID(),
SI);
1342 if (
auto *
F = dyn_cast<Function>(&GV))
1343 Dead = (
F->isDeclaration() &&
F->use_empty()) ||
F->isDefTriviallyDead();
1350 if (
auto *
F = dyn_cast<Function>(&GV)) {
1351 if (DeleteFnCallback)
1352 DeleteFnCallback(*
F);
1375 for (
auto *U : GV->
users()) {
1379 assert(
I->getParent()->getParent() ==
F);
1381 if (
auto *LI = dyn_cast<LoadInst>(
I))
1383 else if (
auto *
SI = dyn_cast<StoreInst>(
I))
1393 auto &DT = LookupDomTree(*
const_cast<Function *
>(
F));
1404 const unsigned Threshold = 100;
1405 if (Loads.
size() * Stores.
size() > Threshold)
1408 for (
auto *L : Loads) {
1409 auto *LTy = L->getType();
1415 return DT.dominates(S, L) &&
1416 DL.getTypeStoreSize(LTy).getFixedValue() <=
1417 DL.getTypeStoreSize(STy).getFixedValue();
1435 if (!isa<Constant>(StoredOnceValue))
1440 if (
auto *LI = dyn_cast<LoadInst>(U)) {
1441 if (LI->getFunction() ==
F &&
1442 LI->getType() == StoredOnceValue->
getType() && LI->isSimple())
1447 bool MadeChange =
false;
1448 if (!Loads.
empty()) {
1449 auto &DT = LookupDomTree(*
const_cast<Function *
>(
F));
1450 for (
auto *LI : Loads) {
1451 if (DT.dominates(StoredOnceStore, LI)) {
1452 LI->replaceAllUsesWith(
const_cast<Value *
>(StoredOnceValue));
1453 LI->eraseFromParent();
1477 if (!GS.HasMultipleAccessingFunctions &&
1478 GS.AccessingFunction &&
1482 GS.AccessingFunction->doesNotRecurse() &&
1489 ->getEntryBlock().begin());
1503 bool Changed =
false;
1534 if (GS.Ordering == AtomicOrdering::NotAtomic) {
1545 LLVM_DEBUG(
dbgs() <<
" *** Marking constant allowed us to simplify "
1546 <<
"all users and delete global!\n");
1560 Value *StoredOnceValue = GS.getStoredOnceValue();
1563 const_cast<Function &
>(*GS.StoredOnceStore->getFunction());
1564 bool CanHaveNonUndefGlobalInitializer =
1565 GetTTI(StoreFn).canHaveNonUndefGlobalInitializerInAddressSpace(
1574 auto *SOVConstant = dyn_cast<Constant>(StoredOnceValue);
1576 DL.getTypeAllocSize(SOVConstant->getType()) ==
1578 CanHaveNonUndefGlobalInitializer) {
1589 NGV->copyAttributesFrom(GV);
1599 LLVM_DEBUG(
dbgs() <<
" *** Substituting initializer allowed us to "
1600 <<
"simplify all users and delete global!\n");
1615 if (GS.NumStores == 1)
1621 if (SOVConstant && GS.Ordering == AtomicOrdering::NotAtomic &&
1623 CanHaveNonUndefGlobalInitializer)) {
1649 bool Changed =
false;
1651 auto NewUnnamedAddr = GV.
hasLocalLinkage() ? GlobalValue::UnnamedAddr::Global
1652 : GlobalValue::UnnamedAddr::Local;
1664 auto *GVar = dyn_cast<GlobalVariable>(&GV);
1668 if (GVar->isConstant() || !GVar->hasInitializer())
1678 for (
User *U :
F->users()) {
1679 if (isa<BlockAddress>(U))
1688 if (Attrs.hasAttrSomewhere(
A, &AttrIndex))
1689 return Attrs.removeAttributeAtIndex(
C, AttrIndex,
A);
1694 F->setAttributes(
StripAttr(
F->getContext(),
F->getAttributes(),
A));
1695 for (
User *U :
F->users()) {
1696 if (isa<BlockAddress>(U))
1718 for (
User *U :
F->users()) {
1719 if (isa<BlockAddress>(U))
1721 CallInst* CI = dyn_cast<CallInst>(U);
1730 if (BB.getTerminatingMustTailCall())
1741 auto CallSiteFreq = CallerBFI.
getBlockFreq(CallSiteBB);
1742 auto CallerEntryFreq =
1744 return CallSiteFreq < CallerEntryFreq * ColdProb;
1754 const std::vector<Function *> &AllCallsCold) {
1759 for (
User *U :
F.users()) {
1760 if (isa<BlockAddress>(U))
1775 for (
User *U :
F->users()) {
1776 if (isa<BlockAddress>(U))
1790 if (
CallInst *CI = dyn_cast<CallInst>(&
I)) {
1792 if (CI->isInlineAsm())
1794 Function *CalledFn = CI->getCalledFunction();
1819 for (
User *U :
F->users()) {
1820 CallBase *CB = dyn_cast<CallBase>(U);
1822 assert(isa<BlockAddress>(U) &&
1823 "Expected either CallBase or BlockAddress");
1833 for (
User *U :
F->users())
1834 if (isa<InvokeInst>(U))
1842 auto *M =
F->getParent();
1848 for (
User *U : PreallocatedCalls) {
1849 CallBase *CB = dyn_cast<CallBase>(U);
1855 "Shouldn't call RemotePreallocated() on a musttail preallocated call");
1859 CallBase *PreallocatedSetup =
nullptr;
1860 for (
auto *It = OpBundles.
begin(); It != OpBundles.
end(); ++It) {
1861 if (It->getTag() ==
"preallocated") {
1862 PreallocatedSetup = cast<CallBase>(*It->input_begin());
1863 OpBundles.
erase(It);
1867 assert(PreallocatedSetup &&
"Did not find preallocated bundle");
1869 cast<ConstantInt>(PreallocatedSetup->
getArgOperand(0))->getZExtValue();
1871 assert((isa<CallInst>(CB) || isa<InvokeInst>(CB)) &&
1872 "Unknown indirect call type");
1878 Builder.SetInsertPoint(PreallocatedSetup);
1895 for (
auto *
User : PreallocatedArgs) {
1896 auto *UseCall = cast<CallBase>(
User);
1897 assert(UseCall->getCalledFunction()->getIntrinsicID() ==
1898 Intrinsic::call_preallocated_arg &&
1899 "preallocated token use was not a llvm.call.preallocated.arg");
1901 cast<ConstantInt>(UseCall->getArgOperand(1))->getZExtValue();
1902 Value *AllocaReplacement = ArgAllocas[AllocArgIndex];
1903 if (!AllocaReplacement) {
1904 auto AddressSpace = UseCall->getType()->getPointerAddressSpace();
1906 UseCall->getFnAttr(Attribute::Preallocated).getValueAsType();
1908 Builder.SetInsertPoint(InsertBefore);
1911 auto *BitCast =
Builder.CreateBitCast(
1913 ArgAllocas[AllocArgIndex] = BitCast;
1914 AllocaReplacement = BitCast;
1918 UseCall->eraseFromParent();
1921 cast<Instruction>(PreallocatedSetup)->eraseFromParent();
1935 bool Changed =
false;
1937 std::vector<Function *> AllCallsCold;
1940 AllCallsCold.push_back(&
F);
1946 if (
F.hasFnAttribute(Attribute::Naked))
1950 if (!
F.hasName() && !
F.isDeclaration() && !
F.hasLocalLinkage())
1953 if (
deleteIfDead(
F, NotDiscardableComdats, DeleteFnCallback)) {
1967 if (!
F.isDeclaration()) {
1970 ChangedCFGCallback(
F);
1976 if (!
F.hasLocalLinkage())
1984 if (
F.getAttributes().hasAttrSomewhere(Attribute::InAlloca) &&
1992 if (
F.getAttributes().hasAttrSomewhere(Attribute::Preallocated)) {
2028 if (
F.getAttributes().hasAttrSomewhere(Attribute::Nest) &&
2029 !
F.hasAddressTaken()) {
2046 bool Changed =
false;
2053 if (GV.hasInitializer())
2054 if (
auto *
C = dyn_cast<Constant>(GV.getInitializer())) {
2055 auto &
DL = M.getDataLayout();
2061 GV.setInitializer(New);
2069 Changed |=
processGlobal(GV, GetTTI, GetTLI, LookupDomTree);
2079 if (
F->isDeclaration())
2088 ++NumCtorsEvaluated;
2093 <<
F->getName() <<
"' to " << NewInitializers.size()
2095 for (
const auto &Pair : NewInitializers)
2096 Pair.first->setInitializer(Pair.second);
2098 GV->setConstant(
true);
2113 V.eraseFromParent();
2118 const Type *UsedArrayType = V.getValueType();
2119 const auto *VAT = cast<ArrayType>(UsedArrayType);
2120 const auto *VEPT = cast<PointerType>(VAT->getArrayElementType());
2135 ArrayType *ATy = ArrayType::get(Int8PtrTy, UsedArray.
size());
2137 Module *M = V.getParent();
2138 V.removeFromParent();
2143 NV->setSection(
"llvm.metadata");
2163 CompilerUsed = {Vec.
begin(), Vec.
end()};
2169 iterator usedBegin() {
return Used.begin(); }
2170 iterator usedEnd() {
return Used.end(); }
2172 used_iterator_range used() {
2173 return used_iterator_range(usedBegin(), usedEnd());
2176 iterator compilerUsedBegin() {
return CompilerUsed.
begin(); }
2177 iterator compilerUsedEnd() {
return CompilerUsed.
end(); }
2179 used_iterator_range compilerUsed() {
2180 return used_iterator_range(compilerUsedBegin(), compilerUsedEnd());
2186 return CompilerUsed.
count(GV);
2194 return CompilerUsed.
insert(GV).second;
2197 void syncVariablesAndSets() {
2211 assert((!U.usedCount(&GA) || !U.compilerUsedCount(&GA)) &&
2212 "We should have removed the duplicated "
2213 "element from llvm.compiler.used");
2220 return !U.usedCount(&GA) && !U.compilerUsedCount(&GA);
2227 return U.usedCount(&GV) || U.compilerUsedCount(&GV);
2231 bool &RenameTarget) {
2232 RenameTarget =
false;
2253 RenameTarget =
true;
2260 bool Changed =
false;
2264 Used.compilerUsedErase(GV);
2275 if (!J.hasName() && !J.isDeclaration() && !J.hasLocalLinkage())
2284 if (!IsModuleLocal(J))
2287 Constant *Aliasee = J.getAliasee();
2298 Target->removeDeadConstantUsers();
2306 ++NumAliasesResolved;
2312 Target->setLinkage(J.getLinkage());
2313 Target->setDSOLocal(J.isDSOLocal());
2314 Target->setVisibility(J.getVisibility());
2315 Target->setDLLStorageClass(J.getDLLStorageClass());
2317 if (Used.usedErase(&J))
2320 if (Used.compilerUsedErase(&J))
2321 Used.compilerUsedInsert(
Target);
2327 ++NumAliasesRemoved;
2331 Used.syncVariablesAndSets();
2339 auto FuncIter = M.begin();
2340 if (FuncIter == M.end())
2342 auto *TLI = &GetTLI(*FuncIter);
2348 Function *Fn = M.getFunction(TLI->getName(
F));
2356 if (!TLI->getLibFunc(*Fn,
F) ||
F != LibFunc_cxa_atexit)
2373 if (
I.isDebugOrPseudoInst())
2375 if (isa<ReturnInst>(
I))
2397 bool Changed =
false;
2403 CallInst *CI = dyn_cast<CallInst>(U);
2416 ++NumCXXDtorsRemoved;
2433 bool Changed =
false;
2434 bool LocalChange =
true;
2435 std::optional<uint32_t> FirstNotFullyEvaluatedPriority;
2437 while (LocalChange) {
2438 LocalChange =
false;
2440 NotDiscardableComdats.
clear();
2444 NotDiscardableComdats.
insert(
C);
2446 if (
const Comdat *
C =
F.getComdat())
2447 if (!
F.isDefTriviallyDead())
2448 NotDiscardableComdats.
insert(
C);
2450 if (
const Comdat *
C = GA.getComdat())
2451 if (!GA.isDiscardableIfUnused() || !GA.use_empty())
2452 NotDiscardableComdats.
insert(
C);
2456 NotDiscardableComdats, ChangedCFGCallback,
2462 if (FirstNotFullyEvaluatedPriority &&
2463 *FirstNotFullyEvaluatedPriority != Priority)
2467 FirstNotFullyEvaluatedPriority = Priority;
2473 NotDiscardableComdats);
2484 Changed |= LocalChange;
2494 auto &
DL = M.getDataLayout();
2516 ChangedCFGCallback, DeleteFnCallback))
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
Atomic ordering constants.
This file contains the simple types necessary to represent the attributes associated with functions a...
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
static GCRegistry::Add< ErlangGC > A("erlang", "erlang-compatible garbage collector")
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
This file contains the declarations for the subclasses of Constant, which represent the different fla...
This file defines the DenseMap class.
This file contains constants used for implementing Dwarf debug support.
Rewrite Partial Register Uses
static bool IsSafeComputationToRemove(Value *V, function_ref< TargetLibraryInfo &(Function &)> GetTLI)
Given a value that is stored to a global but never read, determine whether it's safe to remove the st...
static Function * FindCXAAtExit(Module &M, function_ref< TargetLibraryInfo &(Function &)> GetTLI)
static bool optimizeOnceStoredGlobal(GlobalVariable *GV, Value *StoredOnceVal, const DataLayout &DL, function_ref< TargetLibraryInfo &(Function &)> GetTLI)
static bool tryToOptimizeStoreOfAllocationToGlobal(GlobalVariable *GV, CallInst *CI, const DataLayout &DL, TargetLibraryInfo *TLI)
If we have a global that is only initialized with a fixed size allocation try to transform the progra...
static void ConstantPropUsersOf(Value *V, const DataLayout &DL, TargetLibraryInfo *TLI)
Walk the use list of V, constant folding all of the instructions that are foldable.
static bool allUsesOfLoadedValueWillTrapIfNull(const GlobalVariable *GV)
Return true if all uses of any loads from GV will trap if the loaded value is null.
static bool AllUsesOfValueWillTrapIfNull(const Value *V, SmallPtrSetImpl< const PHINode * > &PHIs)
Return true if all users of the specified value will trap if the value is dynamically null.
Returns whether the given function is an empty C destructor and can therefore be eliminated Note that we assume that other optimization passes have already simplified the code so we simply check for static ret bool cxxDtorIsEmpty(const Function &Fn)
static GlobalVariable * OptimizeGlobalAddressOfAllocation(GlobalVariable *GV, CallInst *CI, uint64_t AllocSize, Constant *InitVal, const DataLayout &DL, TargetLibraryInfo *TLI)
This function takes the specified global variable, and transforms the program as if it always contain...
static bool collectSRATypes(DenseMap< uint64_t, GlobalPart > &Parts, GlobalVariable *GV, const DataLayout &DL)
Look at all uses of the global and determine which (offset, type) pairs it can be split into.
static bool valueIsOnlyUsedLocallyOrStoredToOneGlobal(const CallInst *CI, const GlobalVariable *GV)
Scan the use-list of GV checking to make sure that there are no complex uses of GV.
static bool OptimizeFunctions(Module &M, function_ref< TargetLibraryInfo &(Function &)> GetTLI, function_ref< TargetTransformInfo &(Function &)> GetTTI, function_ref< BlockFrequencyInfo &(Function &)> GetBFI, function_ref< DominatorTree &(Function &)> LookupDomTree, SmallPtrSetImpl< const Comdat * > &NotDiscardableComdats, function_ref< void(Function &F)> ChangedCFGCallback, function_ref< void(Function &F)> DeleteFnCallback)
static void RemoveAttribute(Function *F, Attribute::AttrKind A)
static cl::opt< int > ColdCCRelFreq("coldcc-rel-freq", cl::Hidden, cl::init(2), cl::desc("Maximum block frequency, expressed as a percentage of caller's " "entry frequency, for a call site to be considered cold for enabling" "coldcc"))
static bool deleteIfDead(GlobalValue &GV, SmallPtrSetImpl< const Comdat * > &NotDiscardableComdats, function_ref< void(Function &)> DeleteFnCallback=nullptr)
static void RemovePreallocated(Function *F)
static bool processGlobal(GlobalValue &GV, function_ref< TargetTransformInfo &(Function &)> GetTTI, function_ref< TargetLibraryInfo &(Function &)> GetTLI, function_ref< DominatorTree &(Function &)> LookupDomTree)
Analyze the specified global variable and optimize it if possible.
static bool isColdCallSite(CallBase &CB, BlockFrequencyInfo &CallerBFI)
Return true if the block containing the call site has a BlockFrequency of less than ColdCCRelFreq% of...
static void transferSRADebugInfo(GlobalVariable *GV, GlobalVariable *NGV, uint64_t FragmentOffsetInBits, uint64_t FragmentSizeInBits, uint64_t VarSize)
Copy over the debug info for a variable to its SRA replacements.
static cl::opt< bool > EnableColdCCStressTest("enable-coldcc-stress-test", cl::desc("Enable stress test of coldcc by adding " "calling conv to all internal functions."), cl::init(false), cl::Hidden)
static bool OptimizeGlobalAliases(Module &M, SmallPtrSetImpl< const Comdat * > &NotDiscardableComdats)
static bool TryToShrinkGlobalToBoolean(GlobalVariable *GV, Constant *OtherVal)
At this point, we have learned that the only two values ever stored into GV are its initializer and O...
static void ChangeCalleesToFastCall(Function *F)
Walk all of the direct calls of the specified function, changing them to FastCC.
static bool hasMustTailCallers(Function *F)
static bool OptimizeEmptyGlobalCXXDtors(Function *CXAAtExitFn)
static bool OptimizeGlobalVars(Module &M, function_ref< TargetTransformInfo &(Function &)> GetTTI, function_ref< TargetLibraryInfo &(Function &)> GetTLI, function_ref< DominatorTree &(Function &)> LookupDomTree, SmallPtrSetImpl< const Comdat * > &NotDiscardableComdats)
static void allUsesOfLoadAndStores(GlobalVariable *GV, SmallVector< Value *, 4 > &Uses)
Get all the loads/store uses for global variable GV.
static bool mayHaveOtherReferences(GlobalValue &GV, const LLVMUsed &U)
static bool hasChangeableCC(Function *F)
Return true if this is a calling convention that we'd like to change.
static void changeCallSitesToColdCC(Function *F)
static AttributeList StripAttr(LLVMContext &C, AttributeList Attrs, Attribute::AttrKind A)
static bool hasInvokeCallers(Function *F)
static void setUsedInitializer(GlobalVariable &V, const SmallPtrSetImpl< GlobalValue * > &Init)
static bool hasOnlyColdCalls(Function &F, function_ref< BlockFrequencyInfo &(Function &)> GetBFI)
static bool OptimizeAwayTrappingUsesOfLoads(GlobalVariable *GV, Constant *LV, const DataLayout &DL, function_ref< TargetLibraryInfo &(Function &)> GetTLI)
The specified global has only one non-null value stored into it.
static bool isValidCandidateForColdCC(Function &F, function_ref< BlockFrequencyInfo &(Function &)> GetBFI, const std::vector< Function * > &AllCallsCold)
static bool optimizeGlobalsInModule(Module &M, const DataLayout &DL, function_ref< TargetLibraryInfo &(Function &)> GetTLI, function_ref< TargetTransformInfo &(Function &)> GetTTI, function_ref< BlockFrequencyInfo &(Function &)> GetBFI, function_ref< DominatorTree &(Function &)> LookupDomTree, function_ref< void(Function &F)> ChangedCFGCallback, function_ref< void(Function &F)> DeleteFnCallback)
static bool EvaluateStaticConstructor(Function *F, const DataLayout &DL, TargetLibraryInfo *TLI)
Evaluate static constructors in the function, if we can.
static bool CleanupConstantGlobalUsers(GlobalVariable *GV, const DataLayout &DL)
We just marked GV constant.
static bool isLeakCheckerRoot(GlobalVariable *GV)
Is this global variable possibly used by a leak checker as a root? If so, we might not really want to...
static bool forwardStoredOnceStore(GlobalVariable *GV, const StoreInst *StoredOnceStore, function_ref< DominatorTree &(Function &)> LookupDomTree)
static int compareNames(Constant *const *A, Constant *const *B)
static bool CleanupPointerRootUsers(GlobalVariable *GV, function_ref< TargetLibraryInfo &(Function &)> GetTLI)
This GV is a pointer root.
static bool isPointerValueDeadOnEntryToFunction(const Function *F, GlobalValue *GV, function_ref< DominatorTree &(Function &)> LookupDomTree)
static bool processInternalGlobal(GlobalVariable *GV, const GlobalStatus &GS, function_ref< TargetTransformInfo &(Function &)> GetTTI, function_ref< TargetLibraryInfo &(Function &)> GetTLI, function_ref< DominatorTree &(Function &)> LookupDomTree)
Analyze the specified global variable and optimize it if possible.
static bool hasUsesToReplace(GlobalAlias &GA, const LLVMUsed &U, bool &RenameTarget)
static bool OptimizeAwayTrappingUsesOfValue(Value *V, Constant *NewV)
static GlobalVariable * SRAGlobal(GlobalVariable *GV, const DataLayout &DL)
Perform scalar replacement of aggregates on the specified global variable.
static bool hasUseOtherThanLLVMUsed(GlobalAlias &GA, const LLVMUsed &U)
Module.h This file contains the declarations for the Module class.
FunctionAnalysisManager FAM
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
This file implements a set that has insertion order iteration characteristics.
This file defines the SmallPtrSet class.
This file defines the SmallVector class.
This file defines the 'Statistic' class, which is designed to be an easy way to expose various metric...
#define STATISTIC(VARNAME, DESC)
static SymbolRef::Type getType(const Symbol *Sym)
This defines the Use class.
Class for arbitrary precision integers.
This class represents a conversion between pointers from one address space to another.
an instruction to allocate memory on the stack
A container for analyses that lazily runs them and caches their results.
void clear(IRUnitT &IR, llvm::StringRef Name)
Clear any cached analysis results for a single unit of IR.
void invalidate(IRUnitT &IR, const PreservedAnalyses &PA)
Invalidate cached analyses for an IR unit.
PassT::Result & getResult(IRUnitT &IR, ExtraArgTs... ExtraArgs)
Get the result of an analysis pass for a given IR unit.
AttrKind
This enumeration lists the attributes that can be associated with parameters, function results,...
LLVM Basic Block Representation.
const Function * getParent() const
Return the enclosing method, or null if none.
static BinaryOperator * CreateNot(Value *Op, const Twine &Name="", Instruction *InsertBefore=nullptr)
This class represents a no-op cast from one type to another.
Analysis pass which computes BlockFrequencyInfo.
BlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to estimate IR basic block frequen...
BlockFrequency getBlockFreq(const BasicBlock *BB) const
getblockFreq - Return block frequency.
Represents analyses that only rely on functions' control flow.
Base class for all callable instructions (InvokeInst and CallInst) Holds everything related to callin...
void getOperandBundlesAsDefs(SmallVectorImpl< OperandBundleDef > &Defs) const
Return the list of operand bundles attached to this instruction as a vector of OperandBundleDefs.
bool isMustTailCall() const
Tests if this call site must be tail call optimized.
static CallBase * Create(CallBase *CB, ArrayRef< OperandBundleDef > Bundles, Instruction *InsertPt=nullptr)
Create a clone of CB with a different set of operand bundles and insert it before InsertPt.
Value * getCalledOperand() const
void setAttributes(AttributeList A)
Set the parameter attributes for this call.
Value * getArgOperand(unsigned i) const
void setArgOperand(unsigned i, Value *v)
void setCalledOperand(Value *V)
unsigned arg_size() const
AttributeList getAttributes() const
Return the parameter attributes for this call.
Function * getCaller()
Helper to get the caller (the parent function).
This class represents a function call, abstracting a target machine's calling convention.
bool isMustTailCall() const
This is the base class for all instructions that perform data casts.
Predicate getPredicate() const
Return the predicate for this instruction.
static Constant * get(ArrayType *T, ArrayRef< Constant * > V)
A constant value that is initialized with an expression using other constant values.
static Constant * getPointerBitCastOrAddrSpaceCast(Constant *C, Type *Ty)
Create a BitCast or AddrSpaceCast for a pointer type depending on the address space.
static Constant * getCast(unsigned ops, Constant *C, Type *Ty, bool OnlyIfReduced=false)
Convenience function for getting a Cast operation.
static Constant * getGetElementPtr(Type *Ty, Constant *C, ArrayRef< Constant * > IdxList, bool InBounds=false, std::optional< unsigned > InRangeIndex=std::nullopt, Type *OnlyIfReducedTy=nullptr)
Getelementptr form.
static Constant * getBitCast(Constant *C, Type *Ty, bool OnlyIfReduced=false)
static ConstantInt * getTrue(LLVMContext &Context)
static Constant * get(Type *Ty, uint64_t V, bool IsSigned=false)
If Ty is a vector type, return a Constant with a splat of the given value.
static ConstantInt * getFalse(LLVMContext &Context)
static ConstantInt * getBool(LLVMContext &Context, bool V)
This is an important base class in LLVM.
const Constant * stripPointerCasts() const
void removeDeadConstantUsers() const
If there are any dead constant users dangling off of this constant, remove them.
static Constant * getNullValue(Type *Ty)
Constructor to create a '0' constant of arbitrary type.
bool isNullValue() const
Return true if this is the value that would be returned by getNullValue.
bool extractIfOffset(int64_t &Offset) const
If this is a constant offset, extract it.
static std::optional< DIExpression * > createFragmentExpression(const DIExpression *Expr, unsigned OffsetInBits, unsigned SizeInBits)
Create a DIExpression to describe one part of an aggregate variable that is fragmented across multipl...
static DIExpression * prependOpcodes(const DIExpression *Expr, SmallVectorImpl< uint64_t > &Ops, bool StackValue=false, bool EntryValue=false)
Prepend DIExpr with the given opcodes and optionally turn it into a stack value.
A pair of DIGlobalVariable and DIExpression.
uint64_t getSizeInBits() const
Base class for variables.
A parsed version of the target data layout string in and methods for querying it.
std::pair< iterator, bool > try_emplace(KeyT &&Key, Ts &&... Args)
std::pair< iterator, bool > insert(const std::pair< KeyT, ValueT > &KV)
Analysis pass which computes a DominatorTree.
Concrete subclass of DominatorTreeBase that is used to compute a normal dominator tree.
This class evaluates LLVM IR, producing the Constant representing each SSA instruction.
DenseMap< GlobalVariable *, Constant * > getMutatedInitializers() const
bool EvaluateFunction(Function *F, Constant *&RetVal, const SmallVectorImpl< Constant * > &ActualArgs)
Evaluate a call to function F, returning true if successful, false if we can't evaluate it.
const SmallPtrSetImpl< GlobalVariable * > & getInvariants() const
const BasicBlock & getEntryBlock() const
Intrinsic::ID getIntrinsicID() const LLVM_READONLY
getIntrinsicID - This method returns the ID number of the specified function, or Intrinsic::not_intri...
LLVMContext & getContext() const
getContext - Return a reference to the LLVMContext associated with this function.
bool hasAddressTaken(const User **=nullptr, bool IgnoreCallbackUses=false, bool IgnoreAssumeLikeCalls=true, bool IngoreLLVMUsed=false, bool IgnoreARCAttachedCall=false) const
hasAddressTaken - returns true if there are any uses of this function other than direct calls or invo...
bool isVarArg() const
isVarArg - Return true if this function takes a variable number of arguments.
an instruction for type-safe pointer arithmetic to access elements of arrays and structs
const Constant * getAliasee() const
MaybeAlign getAlign() const
Returns the alignment of the given variable or function.
void setAlignment(Align Align)
Sets the alignment attribute of the GlobalObject.
PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM)
bool isImplicitDSOLocal() const
bool isDeclaration() const
Return true if the primary definition of this global value is outside of the current translation unit...
LinkageTypes getLinkage() const
void setUnnamedAddr(UnnamedAddr Val)
bool hasLocalLinkage() const
bool hasPrivateLinkage() const
const Comdat * getComdat() const
ThreadLocalMode getThreadLocalMode() const
void setLinkage(LinkageTypes LT)
unsigned getAddressSpace() const
Module * getParent()
Get the module that this global value is contained inside of...
void eraseFromParent()
This method unlinks 'this' from the containing module and deletes it.
PointerType * getType() const
Global values are always pointers.
static bool isInterposableLinkage(LinkageTypes Linkage)
Whether the definition of this global may be replaced by something non-equivalent at link time.
bool hasGlobalUnnamedAddr() const
UnnamedAddr getUnnamedAddr() const
static bool isDiscardableIfUnused(LinkageTypes Linkage)
Whether the definition of this global may be discarded if it is not used in its compilation unit.
@ InternalLinkage
Rename collisions when linking (static functions).
@ AppendingLinkage
Special purpose, only applies to global arrays.
Type * getValueType() const
const Constant * getInitializer() const
getInitializer - Return the initializer for this global variable.
void setInitializer(Constant *InitVal)
setInitializer - Sets the initializer for this global variable, removing any existing initializer if ...
bool isExternallyInitialized() const
void setConstant(bool Val)
void copyAttributesFrom(const GlobalVariable *Src)
copyAttributesFrom - copy all additional attributes (those not needed to create a GlobalVariable) fro...
void getDebugInfo(SmallVectorImpl< DIGlobalVariableExpression * > &GVs) const
Fill the vector with all debug info attachements.
bool isConstant() const
If the value is a global constant, its value is immutable throughout the runtime execution of the pro...
void eraseFromParent()
eraseFromParent - This method unlinks 'this' from the containing module and deletes it.
void addDebugInfo(DIGlobalVariableExpression *GV)
Attach a DIGlobalVariableExpression.
This instruction compares its operands according to the predicate given to the constructor.
This provides a uniform API for creating instructions and inserting them into a basic block: either a...
An analysis over an "outer" IR unit that provides access to an analysis manager over an "inner" IR un...
const DebugLoc & getDebugLoc() const
Return the debug location for this node as a DebugLoc.
const BasicBlock * getParent() const
Instruction * user_back()
Specialize the methods defined in Value, as we know that an instruction can only be used by other ins...
const Function * getFunction() const
Return the function this instruction belongs to.
const Instruction * getNextNonDebugInstruction(bool SkipPseudoOp=false) const
Return a pointer to the next non-debug instruction in the same basic block as 'this',...
SymbolTableList< Instruction >::iterator eraseFromParent()
This method unlinks 'this' from the containing basic block and deletes it.
void setDebugLoc(DebugLoc Loc)
Set the debug location information for this instruction.
This is an important class for using LLVM in a threaded context.
An instruction for reading from memory.
AtomicOrdering getOrdering() const
Returns the ordering constraint of this load instruction.
SyncScope::ID getSyncScopeID() const
Returns the synchronization scope ID of this load instruction.
LLVMContext & getContext() const
This is the common base class for memset/memcpy/memmove.
This class wraps the llvm.memset and llvm.memset.inline intrinsics.
This class wraps the llvm.memcpy/memmove intrinsics.
A Module instance is used to store all the information related to an LLVM module.
const DataLayout & getDataLayout() const
Get the data layout for the module's target platform.
void insertGlobalVariable(GlobalVariable *GV)
Insert global variable GV at the end of the global variable list and take ownership.
unsigned getAddressSpace() const
Return the address space of the Pointer type.
A set of analyses that are preserved following a run of a transformation pass.
static PreservedAnalyses none()
Convenience factory function for the empty preserved set.
static PreservedAnalyses all()
Construct a special preserved set that preserves all passes.
void preserveSet()
Mark an analysis set as preserved.
void preserve()
Mark an analysis as preserved.
static SelectInst * Create(Value *C, Value *S1, Value *S2, const Twine &NameStr="", Instruction *InsertBefore=nullptr, Instruction *MDFrom=nullptr)
bool insert(const value_type &X)
Insert a new element into the SetVector.
A templated base class for SmallPtrSet which provides the typesafe interface that is common across al...
bool erase(PtrType Ptr)
erase - If the set contains the specified pointer, remove it and return true, otherwise return false.
size_type count(ConstPtrType Ptr) const
count - Return 1 if the specified pointer is in the set, 0 otherwise.
std::pair< iterator, bool > insert(PtrType Ptr)
Inserts Ptr if and only if there is no element in the container equal to Ptr.
SmallPtrSet - This class implements a set which is optimized for holding SmallSize or less elements.
A SetVector that performs no allocations if smaller than a certain size.
void reserve(size_type N)
iterator erase(const_iterator CI)
void push_back(const T &Elt)
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
An instruction for storing to memory.
Value * getValueOperand()
bool startswith(StringRef Prefix) const
int compare(StringRef RHS) const
compare - Compare two strings; the result is negative, zero, or positive if this string is lexicograp...
Class to represent struct types.
ArrayRef< Type * > elements() const
bool isOpaque() const
Return true if this is a type with an identity that has no body specified yet.
Analysis pass providing the TargetTransformInfo.
Analysis pass providing the TargetLibraryInfo.
Provides information about what library functions are available for the current target.
Target - Wrapper for Target specific information.
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
The instances of the Type class are immutable: once they are created, they are never changed.
bool isVectorTy() const
True if this is an instance of VectorType.
bool isPointerTy() const
True if this is an instance of PointerType.
static IntegerType * getInt1Ty(LLVMContext &C)
unsigned getPointerAddressSpace() const
Get the address space of this pointer or pointer vector type.
@ ScalableVectorTyID
Scalable SIMD vector type.
@ FixedVectorTyID
Fixed width SIMD vector type.
bool isSingleValueType() const
Return true if the type is a valid type for a register in codegen.
static IntegerType * getInt8Ty(LLVMContext &C)
static PointerType * getInt8PtrTy(LLVMContext &C, unsigned AS=0)
bool isFloatingPointTy() const
Return true if this is one of the floating-point types.
TypeID getTypeID() const
Return the type id for the type.
static UndefValue * get(Type *T)
Static factory methods - Return an 'undef' object of the specified type.
A Use represents the edge between a Value definition and its users.
User * getUser() const
Returns the User that contains this Use.
bool replaceUsesOfWith(Value *From, Value *To)
Replace uses of one Value with another.
Value * getOperand(unsigned i) const
LLVM Value Representation.
Type * getType() const
All values are typed, get the type of this value.
const Value * stripAndAccumulateConstantOffsets(const DataLayout &DL, APInt &Offset, bool AllowNonInbounds, bool AllowInvariantGroup=false, function_ref< bool(Value &Value, APInt &Offset)> ExternalAnalysis=nullptr) const
Accumulate the constant offset this value has compared to a base pointer.
bool hasOneUse() const
Return true if there is exactly one use of this value.
void replaceAllUsesWith(Value *V)
Change all uses of this to point to a new Value.
iterator_range< user_iterator > users()
const Value * stripPointerCasts() const
Strip off pointer casts, all-zero GEPs and address space casts.
LLVMContext & getContext() const
All values hold a context through their type.
user_iterator_impl< User > user_iterator
StringRef getName() const
Return a constant reference to the value's name.
void takeName(Value *V)
Transfer the name from V to this value.
This class represents zero extension of integer types.
An efficient, type-erasing, non-owning reference to a callable.
self_iterator getIterator()
NodeTy * getNextNode()
Get the next node, or nullptr for the list tail.
A range adaptor for a pair of iterators.
This provides a very simple, boring adaptor for a begin and end iterator into a range type.
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
@ Cold
Attempts to make code in the caller as efficient as possible under the assumption that the call is no...
@ X86_ThisCall
Similar to X86_StdCall.
@ Fast
Attempts to make calls as fast as possible (e.g.
@ C
The default llvm calling convention, compatible with C.
Function * getDeclaration(Module *M, ID id, ArrayRef< Type * > Tys=std::nullopt)
Create or insert an LLVM Function declaration for an intrinsic, and return it.
initializer< Ty > init(const Ty &Val)
This is an optimization pass for GlobalISel generic memory operations.
Constant * getInitialValueOfAllocation(const Value *V, const TargetLibraryInfo *TLI, Type *Ty)
If this is a call to an allocation function that initializes memory to a fixed value,...
bool RecursivelyDeleteTriviallyDeadInstructions(Value *V, const TargetLibraryInfo *TLI=nullptr, MemorySSAUpdater *MSSAU=nullptr, std::function< void(Value *)> AboutToDeleteCallback=std::function< void(Value *)>())
If the specified value is a trivially dead instruction, delete it.
bool isRemovableAlloc(const CallBase *V, const TargetLibraryInfo *TLI)
Return true if this is a call to an allocation function that does not have side effects that we are r...
const Value * getLoadStorePointerOperand(const Value *V)
A helper function that returns the pointer operand of a load or store instruction.
void append_range(Container &C, Range &&R)
Wrapper function to append a range to a container.
const Value * getUnderlyingObject(const Value *V, unsigned MaxLookup=6)
This method strips off any GEP address adjustments and pointer casts from the specified value,...
iterator_range< early_inc_iterator_impl< detail::IterOfRange< RangeT > > > make_early_inc_range(RangeT &&Range)
Make a range that does early increment to allow mutation of the underlying range without disrupting i...
Constant * ConstantFoldConstant(const Constant *C, const DataLayout &DL, const TargetLibraryInfo *TLI=nullptr)
ConstantFoldConstant - Fold the constant using the specified DataLayout.
bool isInstructionTriviallyDead(Instruction *I, const TargetLibraryInfo *TLI=nullptr)
Return true if the result produced by the instruction is not used, and the instruction will return.
bool getObjectSize(const Value *Ptr, uint64_t &Size, const DataLayout &DL, const TargetLibraryInfo *TLI, ObjectSizeOpts Opts={})
Compute the size of the object pointed by Ptr.
bool isSafeToDestroyConstant(const Constant *C)
It is safe to destroy a constant iff it is only used by constants itself.
Align getOrEnforceKnownAlignment(Value *V, MaybeAlign PrefAlign, const DataLayout &DL, const Instruction *CxtI=nullptr, AssumptionCache *AC=nullptr, const DominatorTree *DT=nullptr)
Try to ensure that the alignment of V is at least PrefAlign bytes.
bool optimizeGlobalCtorsList(Module &M, function_ref< bool(uint32_t, Function *)> ShouldRemove)
Call "ShouldRemove" for every entry in M's global_ctor list and remove the entries for which it retur...
void sort(IteratorTy Start, IteratorTy End)
bool NullPointerIsDefined(const Function *F, unsigned AS=0)
Check whether null pointer dereferencing is considered undefined behavior for a given function or an ...
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
bool none_of(R &&Range, UnaryPredicate P)
Provide wrappers to std::none_of which take ranges instead of having to pass begin/end explicitly.
Constant * ConstantFoldLoadFromConst(Constant *C, Type *Ty, const APInt &Offset, const DataLayout &DL)
Extract value of C at the given Offset reinterpreted as Ty.
Constant * ConstantFoldLoadFromUniformValue(Constant *C, Type *Ty)
If C is a uniform value where all bits are the same (either all zero, all ones, all undef or all pois...
raw_fd_ostream & errs()
This returns a reference to a raw_ostream for standard error.
Constant * ConstantFoldInstruction(Instruction *I, const DataLayout &DL, const TargetLibraryInfo *TLI=nullptr)
ConstantFoldInstruction - Try to constant fold the specified instruction.
bool RecursivelyDeleteTriviallyDeadInstructionsPermissive(SmallVectorImpl< WeakTrackingVH > &DeadInsts, const TargetLibraryInfo *TLI=nullptr, MemorySSAUpdater *MSSAU=nullptr, std::function< void(Value *)> AboutToDeleteCallback=std::function< void(Value *)>())
Same functionality as RecursivelyDeleteTriviallyDeadInstructions, but allow instructions that are not...
auto count_if(R &&Range, UnaryPredicate P)
Wrapper function around std::count_if to count the number of times an element satisfying a given pred...
bool isAllocationFn(const Value *V, const TargetLibraryInfo *TLI)
Tests if a value is a call or invoke to a library function that allocates or reallocates memory (eith...
bool is_contained(R &&Range, const E &Element)
Returns true if Element is found in Range.
Align commonAlignment(Align A, uint64_t Offset)
Returns the alignment that satisfies both alignments.
void array_pod_sort(IteratorTy Start, IteratorTy End)
array_pod_sort - This sorts an array with the specified start and end extent.
bool removeUnreachableBlocks(Function &F, DomTreeUpdater *DTU=nullptr, MemorySSAUpdater *MSSAU=nullptr)
Remove all blocks that can not be reached from the function's entry.
Type * getLoadStoreType(Value *I)
A helper function that returns the type of a load or store instruction.
GlobalVariable * collectUsedGlobalVariables(const Module &M, SmallVectorImpl< GlobalValue * > &Vec, bool CompilerUsed)
Given "llvm.used" or "llvm.compiler.used" as a global name, collect the initializer elements of that ...
Part of the global at a specific offset, which is only accessed through loads and stores with the giv...
This struct is a compact representation of a valid (non-zero power of two) alignment.
As we analyze each global, keep track of some information about it.
@ InitializerStored
This global is stored to, but the only thing stored is the constant it was initialized with.
@ StoredOnce
This global is stored to, but only its initializer and one other value is ever stored to it.
static bool analyzeGlobal(const Value *V, GlobalStatus &GS)
Look at all uses of the global and fill in the GlobalStatus structure.
Various options to control the behavior of getObjectSize.
Function object to check whether the first component of a container supported by std::get (like std::...