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()) {
211 if (
StoreInst *SI = dyn_cast<StoreInst>(U)) {
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;
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());
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) {
671 }
else if (
const PHINode *PN = dyn_cast<PHINode>(U)) {
676 }
else if (isa<ICmpInst>(U) &&
677 !ICmpInst::isSigned(cast<ICmpInst>(U)->getPredicate()) &&
678 isa<LoadInst>(U->getOperand(0)) &&
679 isa<ConstantPointerNull>(U->getOperand(1))) {
680 assert(isa<GlobalValue>(cast<LoadInst>(U->getOperand(0))
681 ->getPointerOperand()
682 ->stripPointerCasts()) &&
683 "Should be GlobalVariable");
700 while (!Worklist.
empty()) {
702 for (
const auto *U :
P->users()) {
703 if (
auto *LI = dyn_cast<LoadInst>(U)) {
707 }
else if (
auto *SI = dyn_cast<StoreInst>(U)) {
709 if (SI->getPointerOperand() !=
P)
711 }
else if (
auto *CE = dyn_cast<ConstantExpr>(U)) {
712 if (CE->stripPointerCasts() != GV)
731 while (!Worklist.
empty()) {
733 for (
auto *U :
P->users()) {
734 if (
auto *CE = dyn_cast<ConstantExpr>(U)) {
739 assert((isa<LoadInst>(U) || isa<StoreInst>(U)) &&
740 "Expect only load or store instructions");
747 bool Changed =
false;
748 for (
auto UI = V->user_begin(),
E = V->user_end(); UI !=
E; ) {
754 if (
LoadInst *LI = dyn_cast<LoadInst>(
I)) {
755 LI->setOperand(0, NewV);
757 }
else if (
StoreInst *SI = dyn_cast<StoreInst>(
I)) {
758 if (SI->getOperand(1) == V) {
759 SI->setOperand(1, NewV);
762 }
else if (isa<CallInst>(
I) || isa<InvokeInst>(
I)) {
769 bool PassedAsArg =
false;
770 for (
unsigned i = 0, e = CB->
arg_size(); i != e; ++i)
778 UI = V->user_begin();
784 if (CI->use_empty()) {
786 CI->eraseFromParent();
791 Idxs.
reserve(GEPI->getNumOperands()-1);
794 if (
Constant *
C = dyn_cast<Constant>(*i))
798 if (Idxs.
size() == GEPI->getNumOperands()-1)
802 if (GEPI->use_empty()) {
804 GEPI->eraseFromParent();
819 bool Changed =
false;
823 bool AllNonStoreUsesGone =
true;
827 if (
LoadInst *LI = dyn_cast<LoadInst>(GlobalUser)) {
830 if (LI->use_empty()) {
831 LI->eraseFromParent();
834 AllNonStoreUsesGone =
false;
836 }
else if (isa<StoreInst>(GlobalUser)) {
838 assert(GlobalUser->getOperand(1) == GV &&
839 "Must be storing *to* the global");
841 AllNonStoreUsesGone =
false;
845 assert((isa<PHINode>(GlobalUser) || isa<SelectInst>(GlobalUser) ||
846 isa<ConstantExpr>(GlobalUser) || isa<CmpInst>(GlobalUser) ||
847 isa<BitCastInst>(GlobalUser) ||
848 isa<GetElementPtrInst>(GlobalUser) ||
849 isa<AddrSpaceCastInst>(GlobalUser)) &&
850 "Only expect load and stores!");
855 LLVM_DEBUG(
dbgs() <<
"OPTIMIZED LOADS FROM STORED ONCE POINTER: " << *GV
862 if (AllNonStoreUsesGone) {
886 I->replaceAllUsesWith(NewC);
890 while (UI !=
E && *UI ==
I)
893 I->eraseFromParent();
907 LLVM_DEBUG(
errs() <<
"PROMOTING GLOBAL: " << *GV <<
" CALL = " << *CI
926 if (!isa<UndefValue>(InitVal)) {
929 Builder.CreateMemSet(NewGV, InitVal, AllocSize, std::nullopt);
942 bool InitBoolUsed =
false;
947 for (
auto *U : Guses) {
948 if (
StoreInst *SI = dyn_cast<StoreInst>(U)) {
953 !isa<ConstantPointerNull>(SI->getValueOperand())),
954 InitBool,
false,
Align(1), SI->getOrdering(),
955 SI->getSyncScopeID(), SI);
956 SI->eraseFromParent();
976 case ICmpInst::ICMP_ULT:
979 case ICmpInst::ICMP_UGE:
982 case ICmpInst::ICMP_ULE:
983 case ICmpInst::ICMP_EQ:
986 case ICmpInst::ICMP_NE:
987 case ICmpInst::ICMP_UGT:
999 cast<StoreInst>(InitBool->
user_back())->eraseFromParent();
1026 while (!Worklist.
empty()) {
1028 if (!Visited.
insert(V).second)
1031 for (
const Use &VUse : V->uses()) {
1032 const User *U = VUse.getUser();
1033 if (isa<LoadInst>(U) || isa<CmpInst>(U))
1036 if (
auto *SI = dyn_cast<StoreInst>(U)) {
1037 if (SI->getValueOperand() == V &&
1038 SI->getPointerOperand()->stripPointerCasts() != GV)
1043 if (
auto *BCI = dyn_cast<BitCastInst>(U)) {
1048 if (
auto *GEPI = dyn_cast<GetElementPtrInst>(U)) {
1085 if (AllocSize >= 2048)
1127 if (
Constant *SOVC = dyn_cast<Constant>(StoredOnceVal)) {
1132 if (
auto *CI = dyn_cast<CallInst>(StoredOnceVal)) {
1133 auto *TLI = &GetTLI(*CI->getFunction());
1163 if (!isa<LoadInst>(U) && !isa<StoreInst>(U))
1184 "No reason to shrink to bool!");
1191 bool IsOneZero =
false;
1192 bool EmitOneOrZero =
true;
1193 auto *CI = dyn_cast<ConstantInt>(OtherVal);
1194 if (CI && CI->getValue().getActiveBits() <= 64) {
1195 IsOneZero = InitVal->
isNullValue() && CI->isOne();
1198 if (CIInit && CIInit->getValue().getActiveBits() <= 64) {
1199 uint64_t ValInit = CIInit->getZExtValue();
1200 uint64_t ValOther = CI->getZExtValue();
1201 uint64_t ValMinus = ValOther - ValInit;
1203 for(
auto *GVe : GVs){
1207 unsigned SizeInOctets =
1219 dwarf::DW_OP_deref_size, SizeInOctets,
1220 dwarf::DW_OP_constu, ValMinus,
1221 dwarf::DW_OP_mul, dwarf::DW_OP_constu, ValInit,
1223 bool WithStackValue =
true;
1226 DIGlobalVariableExpression::get(NewGV->
getContext(), DGV,
E);
1229 EmitOneOrZero =
false;
1233 if (EmitOneOrZero) {
1242 if (
StoreInst *SI = dyn_cast<StoreInst>(UI)) {
1244 bool StoringOther = SI->getOperand(0) == OtherVal;
1247 if (StoringOther || SI->getOperand(0) == InitVal) {
1254 Instruction *StoredVal = cast<Instruction>(SI->getOperand(0));
1259 if (
LoadInst *LI = dyn_cast<LoadInst>(StoredVal)) {
1260 assert(LI->getOperand(0) == GV &&
"Not a copy!");
1264 LI->getOrdering(), LI->getSyncScopeID(), LI);
1266 assert((isa<CastInst>(StoredVal) || isa<SelectInst>(StoredVal)) &&
1267 "This is not a form that we understand!");
1269 assert(isa<LoadInst>(StoreVal) &&
"Not a load of NewGV!");
1273 new StoreInst(StoreVal, NewGV,
false,
Align(1), SI->getOrdering(),
1274 SI->getSyncScopeID(), SI);
1318 if (
auto *
F = dyn_cast<Function>(&GV))
1319 Dead = (
F->isDeclaration() &&
F->use_empty()) ||
F->isDefTriviallyDead();
1326 if (
auto *
F = dyn_cast<Function>(&GV)) {
1327 if (DeleteFnCallback)
1328 DeleteFnCallback(*
F);
1351 for (
auto *U : GV->
users()) {
1355 assert(
I->getParent()->getParent() ==
F);
1357 if (
auto *LI = dyn_cast<LoadInst>(
I))
1359 else if (
auto *SI = dyn_cast<StoreInst>(
I))
1369 auto &DT = LookupDomTree(*
const_cast<Function *
>(
F));
1380 const unsigned Threshold = 100;
1381 if (Loads.
size() * Stores.
size() > Threshold)
1384 for (
auto *L : Loads) {
1385 auto *LTy = L->getType();
1391 return DT.dominates(S, L) &&
1392 DL.getTypeStoreSize(LTy).getFixedValue() <=
1393 DL.getTypeStoreSize(STy).getFixedValue();
1411 if (!isa<Constant>(StoredOnceValue))
1416 if (
auto *LI = dyn_cast<LoadInst>(U)) {
1417 if (LI->getFunction() ==
F &&
1418 LI->getType() == StoredOnceValue->
getType() && LI->isSimple())
1423 bool MadeChange =
false;
1424 if (!Loads.
empty()) {
1425 auto &DT = LookupDomTree(*
const_cast<Function *
>(
F));
1426 for (
auto *LI : Loads) {
1427 if (DT.dominates(StoredOnceStore, LI)) {
1428 LI->replaceAllUsesWith(
const_cast<Value *
>(StoredOnceValue));
1429 LI->eraseFromParent();
1453 if (!GS.HasMultipleAccessingFunctions &&
1454 GS.AccessingFunction &&
1458 GS.AccessingFunction->doesNotRecurse() &&
1465 ->getEntryBlock().begin());
1479 bool Changed =
false;
1510 if (GS.Ordering == AtomicOrdering::NotAtomic) {
1521 LLVM_DEBUG(
dbgs() <<
" *** Marking constant allowed us to simplify "
1522 <<
"all users and delete global!\n");
1536 Value *StoredOnceValue = GS.getStoredOnceValue();
1539 const_cast<Function &
>(*GS.StoredOnceStore->getFunction());
1540 bool CanHaveNonUndefGlobalInitializer =
1541 GetTTI(StoreFn).canHaveNonUndefGlobalInitializerInAddressSpace(
1550 auto *SOVConstant = dyn_cast<Constant>(StoredOnceValue);
1552 DL.getTypeAllocSize(SOVConstant->getType()) ==
1554 CanHaveNonUndefGlobalInitializer) {
1565 NGV->copyAttributesFrom(GV);
1575 LLVM_DEBUG(
dbgs() <<
" *** Substituting initializer allowed us to "
1576 <<
"simplify all users and delete global!\n");
1591 if (GS.NumStores == 1)
1597 if (SOVConstant && GS.Ordering == AtomicOrdering::NotAtomic &&
1599 CanHaveNonUndefGlobalInitializer)) {
1625 bool Changed =
false;
1627 auto NewUnnamedAddr = GV.
hasLocalLinkage() ? GlobalValue::UnnamedAddr::Global
1628 : GlobalValue::UnnamedAddr::Local;
1640 auto *GVar = dyn_cast<GlobalVariable>(&GV);
1644 if (GVar->isConstant() || !GVar->hasInitializer())
1654 for (
User *U :
F->users()) {
1655 if (isa<BlockAddress>(U))
1664 if (Attrs.hasAttrSomewhere(
A, &AttrIndex))
1665 return Attrs.removeAttributeAtIndex(
C, AttrIndex,
A);
1670 F->setAttributes(
StripAttr(
F->getContext(),
F->getAttributes(),
A));
1671 for (
User *U :
F->users()) {
1672 if (isa<BlockAddress>(U))
1694 for (
User *U :
F->users()) {
1695 if (isa<BlockAddress>(U))
1697 CallInst* CI = dyn_cast<CallInst>(U);
1706 if (BB.getTerminatingMustTailCall())
1717 auto CallSiteFreq = CallerBFI.
getBlockFreq(CallSiteBB);
1718 auto CallerEntryFreq =
1720 return CallSiteFreq < CallerEntryFreq * ColdProb;
1730 const std::vector<Function *> &AllCallsCold) {
1735 for (
User *U :
F.users()) {
1736 if (isa<BlockAddress>(U))
1751 for (
User *U :
F->users()) {
1752 if (isa<BlockAddress>(U))
1766 if (
CallInst *CI = dyn_cast<CallInst>(&
I)) {
1768 if (CI->isInlineAsm())
1770 Function *CalledFn = CI->getCalledFunction();
1795 for (
User *U :
F->users()) {
1796 CallBase *CB = dyn_cast<CallBase>(U);
1798 assert(isa<BlockAddress>(U) &&
1799 "Expected either CallBase or BlockAddress");
1809 for (
User *U :
F->users())
1810 if (isa<InvokeInst>(U))
1818 auto *M =
F->getParent();
1824 for (
User *U : PreallocatedCalls) {
1825 CallBase *CB = dyn_cast<CallBase>(U);
1831 "Shouldn't call RemotePreallocated() on a musttail preallocated call");
1835 CallBase *PreallocatedSetup =
nullptr;
1836 for (
auto *It = OpBundles.
begin(); It != OpBundles.
end(); ++It) {
1837 if (It->getTag() ==
"preallocated") {
1838 PreallocatedSetup = cast<CallBase>(*It->input_begin());
1839 OpBundles.
erase(It);
1843 assert(PreallocatedSetup &&
"Did not find preallocated bundle");
1845 cast<ConstantInt>(PreallocatedSetup->
getArgOperand(0))->getZExtValue();
1847 assert((isa<CallInst>(CB) || isa<InvokeInst>(CB)) &&
1848 "Unknown indirect call type");
1854 Builder.SetInsertPoint(PreallocatedSetup);
1855 auto *StackSave =
Builder.CreateStackSave();
1857 Builder.CreateStackRestore(StackSave);
1868 for (
auto *
User : PreallocatedArgs) {
1869 auto *UseCall = cast<CallBase>(
User);
1870 assert(UseCall->getCalledFunction()->getIntrinsicID() ==
1871 Intrinsic::call_preallocated_arg &&
1872 "preallocated token use was not a llvm.call.preallocated.arg");
1874 cast<ConstantInt>(UseCall->getArgOperand(1))->getZExtValue();
1875 Value *AllocaReplacement = ArgAllocas[AllocArgIndex];
1876 if (!AllocaReplacement) {
1877 auto AddressSpace = UseCall->getType()->getPointerAddressSpace();
1879 UseCall->getFnAttr(Attribute::Preallocated).getValueAsType();
1881 Builder.SetInsertPoint(InsertBefore);
1884 ArgAllocas[AllocArgIndex] = Alloca;
1885 AllocaReplacement = Alloca;
1889 UseCall->eraseFromParent();
1892 cast<Instruction>(PreallocatedSetup)->eraseFromParent();
1906 bool Changed =
false;
1908 std::vector<Function *> AllCallsCold;
1911 AllCallsCold.push_back(&
F);
1917 if (
F.hasFnAttribute(Attribute::Naked))
1921 if (!
F.hasName() && !
F.isDeclaration() && !
F.hasLocalLinkage())
1924 if (
deleteIfDead(
F, NotDiscardableComdats, DeleteFnCallback)) {
1938 if (!
F.isDeclaration()) {
1941 ChangedCFGCallback(
F);
1947 if (!
F.hasLocalLinkage())
1955 if (
F.getAttributes().hasAttrSomewhere(Attribute::InAlloca) &&
1963 if (
F.getAttributes().hasAttrSomewhere(Attribute::Preallocated)) {
1999 if (
F.getAttributes().hasAttrSomewhere(Attribute::Nest) &&
2000 !
F.hasAddressTaken()) {
2017 bool Changed =
false;
2024 if (GV.hasInitializer())
2025 if (
auto *
C = dyn_cast<Constant>(GV.getInitializer())) {
2026 auto &
DL = M.getDataLayout();
2032 GV.setInitializer(New);
2040 Changed |=
processGlobal(GV, GetTTI, GetTLI, LookupDomTree);
2050 if (
F->isDeclaration())
2059 ++NumCtorsEvaluated;
2064 <<
F->getName() <<
"' to " << NewInitializers.size()
2066 for (
const auto &Pair : NewInitializers)
2067 Pair.first->setInitializer(Pair.second);
2069 GV->setConstant(
true);
2084 V.eraseFromParent();
2089 const Type *UsedArrayType = V.getValueType();
2090 const auto *VAT = cast<ArrayType>(UsedArrayType);
2091 const auto *VEPT = cast<PointerType>(VAT->getArrayElementType());
2095 PointerType::get(V.getContext(), VEPT->getAddressSpace());
2107 Module *M = V.getParent();
2108 V.removeFromParent();
2113 NV->setSection(
"llvm.metadata");
2133 CompilerUsed = {Vec.
begin(), Vec.
end()};
2139 iterator usedBegin() {
return Used.begin(); }
2140 iterator usedEnd() {
return Used.end(); }
2142 used_iterator_range used() {
2143 return used_iterator_range(usedBegin(), usedEnd());
2146 iterator compilerUsedBegin() {
return CompilerUsed.
begin(); }
2147 iterator compilerUsedEnd() {
return CompilerUsed.
end(); }
2149 used_iterator_range compilerUsed() {
2150 return used_iterator_range(compilerUsedBegin(), compilerUsedEnd());
2156 return CompilerUsed.
count(GV);
2164 return CompilerUsed.
insert(GV).second;
2167 void syncVariablesAndSets() {
2181 assert((!U.usedCount(&GA) || !U.compilerUsedCount(&GA)) &&
2182 "We should have removed the duplicated "
2183 "element from llvm.compiler.used");
2190 return !U.usedCount(&GA) && !U.compilerUsedCount(&GA);
2197 return U.usedCount(&GV) || U.compilerUsedCount(&GV);
2201 bool &RenameTarget) {
2202 RenameTarget =
false;
2223 RenameTarget =
true;
2230 bool Changed =
false;
2234 Used.compilerUsedErase(GV);
2245 if (!J.hasName() && !J.isDeclaration() && !J.hasLocalLinkage())
2254 if (!IsModuleLocal(J))
2257 Constant *Aliasee = J.getAliasee();
2268 Target->removeDeadConstantUsers();
2275 J.replaceAllUsesWith(Aliasee);
2276 ++NumAliasesResolved;
2282 Target->setLinkage(J.getLinkage());
2283 Target->setDSOLocal(J.isDSOLocal());
2284 Target->setVisibility(J.getVisibility());
2285 Target->setDLLStorageClass(J.getDLLStorageClass());
2287 if (Used.usedErase(&J))
2290 if (Used.compilerUsedErase(&J))
2291 Used.compilerUsedInsert(
Target);
2297 ++NumAliasesRemoved;
2301 Used.syncVariablesAndSets();
2309 auto FuncIter = M.begin();
2310 if (FuncIter == M.end())
2312 auto *TLI = &GetTLI(*FuncIter);
2318 Function *Fn = M.getFunction(TLI->getName(
F));
2326 if (!TLI->getLibFunc(*Fn,
F) ||
F != LibFunc_cxa_atexit)
2343 if (
I.isDebugOrPseudoInst())
2345 if (isa<ReturnInst>(
I))
2367 bool Changed =
false;
2373 CallInst *CI = dyn_cast<CallInst>(U);
2386 ++NumCXXDtorsRemoved;
2403 bool Changed =
false;
2404 bool LocalChange =
true;
2405 std::optional<uint32_t> FirstNotFullyEvaluatedPriority;
2407 while (LocalChange) {
2408 LocalChange =
false;
2410 NotDiscardableComdats.
clear();
2414 NotDiscardableComdats.
insert(
C);
2416 if (
const Comdat *
C =
F.getComdat())
2417 if (!
F.isDefTriviallyDead())
2418 NotDiscardableComdats.
insert(
C);
2420 if (
const Comdat *
C = GA.getComdat())
2421 if (!GA.isDiscardableIfUnused() || !GA.use_empty())
2422 NotDiscardableComdats.
insert(
C);
2426 NotDiscardableComdats, ChangedCFGCallback,
2432 if (FirstNotFullyEvaluatedPriority &&
2433 *FirstNotFullyEvaluatedPriority != Priority)
2437 FirstNotFullyEvaluatedPriority = Priority;
2443 NotDiscardableComdats);
2454 Changed |= LocalChange;
2464 auto &
DL = M.getDataLayout();
2486 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)
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
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 * getGetElementPtr(Type *Ty, Constant *C, ArrayRef< Constant * > IdxList, bool InBounds=false, std::optional< unsigned > InRangeIndex=std::nullopt, Type *OnlyIfReducedTy=nullptr)
Getelementptr form.
static Constant * getAddrSpaceCast(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.
This class represents an Operation in the Expression.
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
bool hasAddressTaken(const User **=nullptr, bool IgnoreCallbackUses=false, bool IgnoreAssumeLikeCalls=true, bool IngoreLLVMUsed=false, bool IgnoreARCAttachedCall=false, bool IgnoreCastedDirectCall=false) const
hasAddressTaken - returns true if there are any uses of this function other than direct calls or invo...
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 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
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.
void insertGlobalVariable(GlobalVariable *GV)
Insert global variable GV at the end of the global variable list and take ownership.
const DataLayout & getDataLayout() const
Get the data layout for the module's target platform.
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)
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.
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)
bool isFloatingPointTy() const
Return true if this is one of the floating-point types.
bool isScalableTy() const
Return true if this is a type whose size is a known multiple of vscale.
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.
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.
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::...