77#define DEBUG_TYPE "globalopt"
79STATISTIC(NumMarked ,
"Number of globals marked constant");
80STATISTIC(NumUnnamed ,
"Number of globals marked unnamed_addr");
81STATISTIC(NumSRA ,
"Number of aggregate globals broken into scalars");
82STATISTIC(NumSubstitute,
"Number of globals with initializers stored into them");
84STATISTIC(NumGlobUses ,
"Number of global uses devirtualized");
85STATISTIC(NumLocalized ,
"Number of globals localized");
86STATISTIC(NumShrunkToBool ,
"Number of global vars shrunk to booleans");
87STATISTIC(NumFastCallFns ,
"Number of functions converted to fastcc");
88STATISTIC(NumCtorsEvaluated,
"Number of static ctors evaluated");
89STATISTIC(NumNestRemoved ,
"Number of nest attributes removed");
90STATISTIC(NumAliasesResolved,
"Number of global aliases resolved");
91STATISTIC(NumAliasesRemoved,
"Number of global aliases eliminated");
92STATISTIC(NumCXXDtorsRemoved,
"Number of global C++ destructors removed");
93STATISTIC(NumInternalFunc,
"Number of internal functions");
94STATISTIC(NumColdCC,
"Number of functions marked coldcc");
98 cl::desc(
"Enable stress test of coldcc by adding "
99 "calling conv to all internal functions."),
105 "Maximum block frequency, expressed as a percentage of caller's "
106 "entry frequency, for a call site to be considered cold for enabling"
128 Type *Ty = Types.pop_back_val();
135 if (cast<VectorType>(Ty)->getElementType()->isPointerTy())
139 Types.push_back(cast<ArrayType>(Ty)->getElementType());
145 if (isa<PointerType>(InnerTy))
return true;
146 if (isa<StructType>(InnerTy) || isa<ArrayType>(InnerTy) ||
147 isa<VectorType>(InnerTy))
148 Types.push_back(InnerTy);
153 if (--Limit == 0)
return true;
154 }
while (!Types.empty());
164 if (isa<Constant>(V))
168 if (isa<LoadInst>(V) || isa<InvokeInst>(V) || isa<Argument>(V) ||
175 if (
I->mayHaveSideEffects())
178 if (!
GEP->hasAllConstantIndices())
180 }
else if (
I->getNumOperands() != 1) {
184 V =
I->getOperand(0);
203 bool Changed =
false;
211 while (!Worklist.
empty()) {
214 Value *V =
SI->getValueOperand();
215 if (isa<Constant>(V)) {
217 SI->eraseFromParent();
220 Dead.push_back(std::make_pair(
I,
SI));
222 }
else if (
MemSetInst *MSI = dyn_cast<MemSetInst>(U)) {
223 if (isa<Constant>(MSI->getValue())) {
225 MSI->eraseFromParent();
226 }
else if (
Instruction *
I = dyn_cast<Instruction>(MSI->getValue())) {
228 Dead.push_back(std::make_pair(
I, MSI));
231 GlobalVariable *MemSrc = dyn_cast<GlobalVariable>(MTI->getSource());
234 MTI->eraseFromParent();
235 }
else if (
Instruction *
I = dyn_cast<Instruction>(MTI->getSource())) {
237 Dead.push_back(std::make_pair(
I, MTI));
239 }
else if (
ConstantExpr *CE = dyn_cast<ConstantExpr>(U)) {
240 if (CE->use_empty()) {
241 CE->destroyConstant();
243 }
else if (isa<GEPOperator>(CE))
245 }
else if (
Constant *
C = dyn_cast<Constant>(U)) {
247 C->destroyConstant();
256 for (
int i = 0, e = Dead.size(); i != e; ++i) {
258 Dead[i].second->eraseFromParent();
263 Instruction *J = dyn_cast<Instruction>(
I->getOperand(0));
266 I->eraseFromParent();
269 I->eraseFromParent();
285 bool Changed =
false;
289 for (
Value *Op :
I->operands())
290 if (
auto *OpI = dyn_cast<Instruction>(Op))
292 I->eraseFromParent();
295 while (!WorkList.
empty()) {
297 if (!Visited.
insert(U).second)
300 if (
auto *BO = dyn_cast<BitCastOperator>(U))
302 if (
auto *ASC = dyn_cast<AddrSpaceCastOperator>(U))
304 else if (
auto *
GEP = dyn_cast<GEPOperator>(U))
306 else if (
auto *LI = dyn_cast<LoadInst>(U)) {
309 Type *Ty = LI->getType();
311 LI->replaceAllUsesWith(Res);
316 Value *PtrOp = LI->getPointerOperand();
326 }
else if (
StoreInst *
SI = dyn_cast<StoreInst>(U)) {
356 auto AppendUses = [&](
Value *V) {
357 for (
Use &U : V->uses())
358 if (Visited.
insert(&U).second)
362 while (!Worklist.
empty()) {
364 User *V = U->getUser();
366 auto *
GEP = dyn_cast<GEPOperator>(V);
367 if (isa<BitCastOperator>(V) || isa<AddrSpaceCastOperator>(V) ||
368 (
GEP &&
GEP->hasAllConstantIndices())) {
376 if (isa<StoreInst>(V) && U->getOperandNo() == 0)
382 if (
Ptr != GV ||
Offset.getActiveBits() >= 64)
388 const auto &[It, Inserted] =
390 if (Ty != It->second.Ty)
394 It->second.Initializer =
396 if (!It->second.Initializer) {
397 LLVM_DEBUG(
dbgs() <<
"Global SRA: Failed to evaluate initializer of "
398 << *GV <<
" with type " << *Ty <<
" at offset "
399 <<
Offset.getZExtValue());
405 if (isa<ScalableVectorType>(Ty))
409 auto *
SI = dyn_cast<StoreInst>(V);
413 Constant *StoredConst = dyn_cast<Constant>(
SI->getOperand(0));
418 return Initializer != StoredConst;
421 It->second.IsLoaded |= isa<LoadInst>(V);
422 It->second.IsStored |= IsStored(V, It->second.Initializer);
427 if (
auto *
C = dyn_cast<Constant>(V)) {
447 for (
auto *GVE : GVs) {
450 int64_t CurVarOffsetInBytes = 0;
452 uint64_t FragmentEndInBits = FragmentOffsetInBits + FragmentSizeInBits;
459 if (CurVarOffsetInBytes < 0)
463 CurVarOffsetInBits = CHAR_BIT * (
uint64_t)CurVarOffsetInBytes;
466 if (CurVarOffsetInBits >= FragmentEndInBits)
470 uint64_t CurVarEndInBits = CurVarOffsetInBits + CurVarSize;
472 if (CurVarSize != 0 &&
473 CurVarEndInBits <= FragmentOffsetInBits)
478 if (CurVarSize != 0 &&
479 CurVarOffsetInBits >= FragmentOffsetInBits &&
480 CurVarEndInBits <= FragmentEndInBits) {
482 (CurVarOffsetInBits - FragmentOffsetInBits) / 8;
483 if (CurVarOffsetInFragment != 0)
484 Expr = DIExpression::get(Expr->
getContext(), {dwarf::DW_OP_plus_uconst,
485 CurVarOffsetInFragment});
487 Expr = DIExpression::get(Expr->
getContext(), {});
489 DIGlobalVariableExpression::get(GVE->getContext(), Var, Expr);
495 if (FragmentSizeInBits < VarSize) {
496 if (CurVarOffsetInBits > FragmentOffsetInBits)
498 uint64_t CurVarFragmentOffsetInBits =
499 FragmentOffsetInBits - CurVarOffsetInBits;
500 uint64_t CurVarFragmentSizeInBits = FragmentSizeInBits;
501 if (CurVarSize != 0 && CurVarEndInBits < FragmentEndInBits)
502 CurVarFragmentSizeInBits -= (FragmentEndInBits - CurVarEndInBits);
503 if (CurVarOffsetInBits)
504 Expr = DIExpression::get(Expr->
getContext(), {});
506 Expr, CurVarFragmentOffsetInBits, CurVarFragmentSizeInBits))
511 auto *NGVE = DIGlobalVariableExpression::get(GVE->getContext(), Var, Expr);
536 unsigned NumParts =
count_if(Parts, [](
const auto &Pair) {
537 return Pair.second.IsLoaded && Pair.second.IsStored;
544 for (
const auto &Pair : Parts) {
546 {Pair.first, Pair.second.Ty, Pair.second.Initializer});
552 for (
const auto &[OffsetForTy, Ty,
_] : TypesVector) {
557 Offset = OffsetForTy +
DL.getTypeAllocSize(Ty);
564 LLVM_DEBUG(
dbgs() <<
"PERFORMING GLOBAL SRA ON: " << *GV <<
"\n");
567 Align StartAlignment =
573 unsigned NameSuffix = 0;
574 for (
auto &[OffsetForTy, Ty, Initializer] : TypesVector) {
576 *GV->
getParent(), Ty,
false, GlobalVariable::InternalLinkage,
577 Initializer, GV->
getName() +
"." +
Twine(NameSuffix++), GV,
580 NewGlobals.
insert({OffsetForTy, NGV});
586 if (NewAlign >
DL.getABITypeAlign(Ty))
591 DL.getTypeAllocSizeInBits(Ty), VarSize);
598 auto AppendUsers = [&](
Value *V) {
599 for (
User *U : V->users())
600 if (Visited.
insert(U).second)
604 while (!Worklist.
empty()) {
606 if (isa<BitCastOperator>(V) || isa<AddrSpaceCastOperator>(V) ||
607 isa<GEPOperator>(V)) {
609 if (isa<Instruction>(V))
618 assert(
Ptr == GV &&
"Load/store must be from/to global");
620 assert(NGV &&
"Must have replacement global for this offset");
627 if (
auto *LI = dyn_cast<LoadInst>(V)) {
628 LI->setOperand(0, NGV);
629 LI->setAlignment(NewAlign);
631 auto *
SI = cast<StoreInst>(V);
632 SI->setOperand(1, NGV);
633 SI->setAlignment(NewAlign);
639 "Other users can only be dead constants");
649 return NewGlobals.
begin()->second;
657 for (
const User *U : V->users()) {
664 if (isa<LoadInst>(U)) {
666 }
else if (
const StoreInst *
SI = dyn_cast<StoreInst>(U)) {
667 if (
SI->getOperand(0) == V) {
670 }
else if (
const CallInst *CI = dyn_cast<CallInst>(U)) {
671 if (CI->getCalledOperand() != V) {
674 }
else if (
const InvokeInst *II = dyn_cast<InvokeInst>(U)) {
675 if (II->getCalledOperand() != V) {
678 }
else if (
const BitCastInst *CI = dyn_cast<BitCastInst>(U)) {
682 }
else if (
const PHINode *PN = dyn_cast<PHINode>(U)) {
687 }
else if (isa<ICmpInst>(U) &&
688 !ICmpInst::isSigned(cast<ICmpInst>(U)->getPredicate()) &&
689 isa<LoadInst>(U->getOperand(0)) &&
690 isa<ConstantPointerNull>(U->getOperand(1))) {
691 assert(isa<GlobalValue>(cast<LoadInst>(U->getOperand(0))
692 ->getPointerOperand()
693 ->stripPointerCasts()) &&
694 "Should be GlobalVariable");
711 while (!Worklist.
empty()) {
713 for (
const auto *U :
P->users()) {
714 if (
auto *LI = dyn_cast<LoadInst>(U)) {
718 }
else if (
auto *
SI = dyn_cast<StoreInst>(U)) {
720 if (
SI->getPointerOperand() !=
P)
722 }
else if (
auto *CE = dyn_cast<ConstantExpr>(U)) {
723 if (CE->stripPointerCasts() != GV)
742 while (!Worklist.
empty()) {
744 for (
auto *U :
P->users()) {
745 if (
auto *CE = dyn_cast<ConstantExpr>(U)) {
750 assert((isa<LoadInst>(U) || isa<StoreInst>(U)) &&
751 "Expect only load or store instructions");
758 bool Changed =
false;
759 for (
auto UI = V->user_begin(),
E = V->user_end(); UI !=
E; ) {
765 if (
LoadInst *LI = dyn_cast<LoadInst>(
I)) {
766 LI->setOperand(0, NewV);
769 if (
SI->getOperand(1) == V) {
770 SI->setOperand(1, NewV);
773 }
else if (isa<CallInst>(
I) || isa<InvokeInst>(
I)) {
780 bool PassedAsArg =
false;
781 for (
unsigned i = 0, e = CB->
arg_size(); i != e; ++i)
789 UI = V->user_begin();
792 }
else if (
CastInst *CI = dyn_cast<CastInst>(
I)) {
796 if (CI->use_empty()) {
798 CI->eraseFromParent();
803 Idxs.
reserve(GEPI->getNumOperands()-1);
806 if (
Constant *
C = dyn_cast<Constant>(*i))
810 if (Idxs.
size() == GEPI->getNumOperands()-1)
814 if (GEPI->use_empty()) {
816 GEPI->eraseFromParent();
831 bool Changed =
false;
835 bool AllNonStoreUsesGone =
true;
839 if (
LoadInst *LI = dyn_cast<LoadInst>(GlobalUser)) {
842 if (LI->use_empty()) {
843 LI->eraseFromParent();
846 AllNonStoreUsesGone =
false;
848 }
else if (isa<StoreInst>(GlobalUser)) {
850 assert(GlobalUser->getOperand(1) == GV &&
851 "Must be storing *to* the global");
853 AllNonStoreUsesGone =
false;
857 assert((isa<PHINode>(GlobalUser) || isa<SelectInst>(GlobalUser) ||
858 isa<ConstantExpr>(GlobalUser) || isa<CmpInst>(GlobalUser) ||
859 isa<BitCastInst>(GlobalUser) ||
860 isa<GetElementPtrInst>(GlobalUser)) &&
861 "Only expect load and stores!");
866 LLVM_DEBUG(
dbgs() <<
"OPTIMIZED LOADS FROM STORED ONCE POINTER: " << *GV
873 if (AllNonStoreUsesGone) {
897 I->replaceAllUsesWith(NewC);
901 while (UI !=
E && *UI ==
I)
904 I->eraseFromParent();
918 LLVM_DEBUG(
errs() <<
"PROMOTING GLOBAL: " << *GV <<
" CALL = " << *CI
937 if (!isa<UndefValue>(InitVal)) {
940 Builder.CreateMemSet(NewGV, InitVal, AllocSize, std::nullopt);
948 if (BCI->getType() == NewGV->
getType()) {
949 BCI->replaceAllUsesWith(NewGV);
950 BCI->eraseFromParent();
952 BCI->setOperand(0, NewGV);
971 bool InitBoolUsed =
false;
976 for (
auto *U : Guses) {
982 !isa<ConstantPointerNull>(
SI->getValueOperand())),
983 InitBool,
false,
Align(1),
SI->getOrdering(),
984 SI->getSyncScopeID(),
SI);
985 SI->eraseFromParent();
1004 InitBoolUsed =
true;
1007 case ICmpInst::ICMP_ULT:
1010 case ICmpInst::ICMP_UGE:
1013 case ICmpInst::ICMP_ULE:
1014 case ICmpInst::ICMP_EQ:
1017 case ICmpInst::ICMP_NE:
1018 case ICmpInst::ICMP_UGT:
1028 if (!InitBoolUsed) {
1030 cast<StoreInst>(InitBool->
user_back())->eraseFromParent();
1042 for (
auto *CE : RepValues)
1058 while (!Worklist.
empty()) {
1060 if (!Visited.
insert(V).second)
1063 for (
const Use &VUse : V->uses()) {
1064 const User *U = VUse.getUser();
1065 if (isa<LoadInst>(U) || isa<CmpInst>(U))
1068 if (
auto *
SI = dyn_cast<StoreInst>(U)) {
1069 if (
SI->getValueOperand() == V &&
1070 SI->getPointerOperand()->stripPointerCasts() != GV)
1075 if (
auto *BCI = dyn_cast<BitCastInst>(U)) {
1080 if (
auto *GEPI = dyn_cast<GetElementPtrInst>(U)) {
1117 if (AllocSize >= 2048)
1159 if (
Constant *SOVC = dyn_cast<Constant>(StoredOnceVal)) {
1167 if (
auto *CI = dyn_cast<CallInst>(StoredOnceVal)) {
1168 auto *TLI = &GetTLI(*CI->getFunction());
1198 if (!isa<LoadInst>(U) && !isa<StoreInst>(U))
1219 "No reason to shrink to bool!");
1226 bool IsOneZero =
false;
1227 bool EmitOneOrZero =
true;
1228 auto *CI = dyn_cast<ConstantInt>(OtherVal);
1229 if (CI && CI->getValue().getActiveBits() <= 64) {
1230 IsOneZero = InitVal->
isNullValue() && CI->isOne();
1233 if (CIInit && CIInit->getValue().getActiveBits() <= 64) {
1234 uint64_t ValInit = CIInit->getZExtValue();
1235 uint64_t ValOther = CI->getZExtValue();
1236 uint64_t ValMinus = ValOther - ValInit;
1238 for(
auto *GVe : GVs){
1242 unsigned SizeInOctets =
1254 dwarf::DW_OP_deref_size, SizeInOctets,
1255 dwarf::DW_OP_constu, ValMinus,
1256 dwarf::DW_OP_mul, dwarf::DW_OP_constu, ValInit,
1258 bool WithStackValue =
true;
1261 DIGlobalVariableExpression::get(NewGV->
getContext(), DGV,
E);
1264 EmitOneOrZero =
false;
1268 if (EmitOneOrZero) {
1279 bool StoringOther =
SI->getOperand(0) == OtherVal;
1282 if (StoringOther ||
SI->getOperand(0) == InitVal) {
1289 Instruction *StoredVal = cast<Instruction>(
SI->getOperand(0));
1294 if (
LoadInst *LI = dyn_cast<LoadInst>(StoredVal)) {
1295 assert(LI->getOperand(0) == GV &&
"Not a copy!");
1299 LI->getOrdering(), LI->getSyncScopeID(), LI);
1301 assert((isa<CastInst>(StoredVal) || isa<SelectInst>(StoredVal)) &&
1302 "This is not a form that we understand!");
1304 assert(isa<LoadInst>(StoreVal) &&
"Not a load of NewGV!");
1309 SI->getSyncScopeID(),
SI);
1353 if (
auto *
F = dyn_cast<Function>(&GV))
1354 Dead = (
F->isDeclaration() &&
F->use_empty()) ||
F->isDefTriviallyDead();
1361 if (
auto *
F = dyn_cast<Function>(&GV)) {
1362 if (DeleteFnCallback)
1363 DeleteFnCallback(*
F);
1386 for (
auto *U : GV->
users()) {
1390 assert(
I->getParent()->getParent() ==
F);
1392 if (
auto *LI = dyn_cast<LoadInst>(
I))
1394 else if (
auto *
SI = dyn_cast<StoreInst>(
I))
1404 auto &DT = LookupDomTree(*
const_cast<Function *
>(
F));
1415 const unsigned Threshold = 100;
1416 if (Loads.
size() * Stores.
size() > Threshold)
1419 for (
auto *L : Loads) {
1420 auto *LTy = L->getType();
1426 return DT.dominates(S, L) &&
1427 DL.getTypeStoreSize(LTy).getFixedValue() <=
1428 DL.getTypeStoreSize(STy).getFixedValue();
1446 if (!isa<Constant>(StoredOnceValue))
1451 if (
auto *LI = dyn_cast<LoadInst>(U)) {
1452 if (LI->getFunction() ==
F &&
1453 LI->getType() == StoredOnceValue->
getType() && LI->isSimple())
1458 bool MadeChange =
false;
1459 if (!Loads.
empty()) {
1460 auto &DT = LookupDomTree(*
const_cast<Function *
>(
F));
1461 for (
auto *LI : Loads) {
1462 if (DT.dominates(StoredOnceStore, LI)) {
1463 LI->replaceAllUsesWith(
const_cast<Value *
>(StoredOnceValue));
1464 LI->eraseFromParent();
1488 if (!GS.HasMultipleAccessingFunctions &&
1489 GS.AccessingFunction &&
1493 GS.AccessingFunction->doesNotRecurse() &&
1500 ->getEntryBlock().begin());
1514 bool Changed =
false;
1545 if (GS.Ordering == AtomicOrdering::NotAtomic) {
1556 LLVM_DEBUG(
dbgs() <<
" *** Marking constant allowed us to simplify "
1557 <<
"all users and delete global!\n");
1571 Value *StoredOnceValue = GS.getStoredOnceValue();
1574 const_cast<Function &
>(*GS.StoredOnceStore->getFunction());
1575 bool CanHaveNonUndefGlobalInitializer =
1576 GetTTI(StoreFn).canHaveNonUndefGlobalInitializerInAddressSpace(
1585 auto *SOVConstant = dyn_cast<Constant>(StoredOnceValue);
1587 DL.getTypeAllocSize(SOVConstant->getType()) ==
1589 CanHaveNonUndefGlobalInitializer) {
1600 NGV->copyAttributesFrom(GV);
1610 LLVM_DEBUG(
dbgs() <<
" *** Substituting initializer allowed us to "
1611 <<
"simplify all users and delete global!\n");
1626 if (GS.NumStores == 1)
1632 if (SOVConstant && GS.Ordering == AtomicOrdering::NotAtomic &&
1634 CanHaveNonUndefGlobalInitializer)) {
1660 bool Changed =
false;
1662 auto NewUnnamedAddr = GV.
hasLocalLinkage() ? GlobalValue::UnnamedAddr::Global
1663 : GlobalValue::UnnamedAddr::Local;
1675 auto *GVar = dyn_cast<GlobalVariable>(&GV);
1679 if (GVar->isConstant() || !GVar->hasInitializer())
1689 for (
User *U :
F->users()) {
1690 if (isa<BlockAddress>(U))
1699 if (Attrs.hasAttrSomewhere(
A, &AttrIndex))
1700 return Attrs.removeAttributeAtIndex(
C, AttrIndex,
A);
1705 F->setAttributes(
StripAttr(
F->getContext(),
F->getAttributes(),
A));
1706 for (
User *U :
F->users()) {
1707 if (isa<BlockAddress>(U))
1729 for (
User *U :
F->users()) {
1730 if (isa<BlockAddress>(U))
1732 CallInst* CI = dyn_cast<CallInst>(U);
1741 if (BB.getTerminatingMustTailCall())
1752 auto CallSiteFreq = CallerBFI.
getBlockFreq(CallSiteBB);
1753 auto CallerEntryFreq =
1755 return CallSiteFreq < CallerEntryFreq * ColdProb;
1765 const std::vector<Function *> &AllCallsCold) {
1770 for (
User *U :
F.users()) {
1771 if (isa<BlockAddress>(U))
1786 for (
User *U :
F->users()) {
1787 if (isa<BlockAddress>(U))
1801 if (
CallInst *CI = dyn_cast<CallInst>(&
I)) {
1803 if (CI->isInlineAsm())
1805 Function *CalledFn = CI->getCalledFunction();
1830 for (
User *U :
F->users()) {
1831 CallBase *CB = dyn_cast<CallBase>(U);
1833 assert(isa<BlockAddress>(U) &&
1834 "Expected either CallBase or BlockAddress");
1844 for (
User *U :
F->users())
1845 if (isa<InvokeInst>(U))
1853 auto *M =
F->getParent();
1859 for (
User *U : PreallocatedCalls) {
1860 CallBase *CB = dyn_cast<CallBase>(U);
1866 "Shouldn't call RemotePreallocated() on a musttail preallocated call");
1870 CallBase *PreallocatedSetup =
nullptr;
1871 for (
auto *It = OpBundles.
begin(); It != OpBundles.
end(); ++It) {
1872 if (It->getTag() ==
"preallocated") {
1873 PreallocatedSetup = cast<CallBase>(*It->input_begin());
1874 OpBundles.
erase(It);
1878 assert(PreallocatedSetup &&
"Did not find preallocated bundle");
1880 cast<ConstantInt>(PreallocatedSetup->
getArgOperand(0))->getZExtValue();
1882 assert((isa<CallInst>(CB) || isa<InvokeInst>(CB)) &&
1883 "Unknown indirect call type");
1889 Builder.SetInsertPoint(PreallocatedSetup);
1906 for (
auto *
User : PreallocatedArgs) {
1907 auto *UseCall = cast<CallBase>(
User);
1908 assert(UseCall->getCalledFunction()->getIntrinsicID() ==
1909 Intrinsic::call_preallocated_arg &&
1910 "preallocated token use was not a llvm.call.preallocated.arg");
1912 cast<ConstantInt>(UseCall->getArgOperand(1))->getZExtValue();
1913 Value *AllocaReplacement = ArgAllocas[AllocArgIndex];
1914 if (!AllocaReplacement) {
1915 auto AddressSpace = UseCall->getType()->getPointerAddressSpace();
1917 UseCall->getFnAttr(Attribute::Preallocated).getValueAsType();
1919 Builder.SetInsertPoint(InsertBefore);
1922 auto *BitCast =
Builder.CreateBitCast(
1924 ArgAllocas[AllocArgIndex] = BitCast;
1925 AllocaReplacement = BitCast;
1929 UseCall->eraseFromParent();
1932 cast<Instruction>(PreallocatedSetup)->eraseFromParent();
1946 bool Changed =
false;
1948 std::vector<Function *> AllCallsCold;
1951 AllCallsCold.push_back(&
F);
1957 if (
F.hasFnAttribute(Attribute::Naked))
1961 if (!
F.hasName() && !
F.isDeclaration() && !
F.hasLocalLinkage())
1964 if (
deleteIfDead(
F, NotDiscardableComdats, DeleteFnCallback)) {
1978 if (!
F.isDeclaration()) {
1981 ChangedCFGCallback(
F);
1987 if (!
F.hasLocalLinkage())
1995 if (
F.getAttributes().hasAttrSomewhere(Attribute::InAlloca) &&
2003 if (
F.getAttributes().hasAttrSomewhere(Attribute::Preallocated)) {
2039 if (
F.getAttributes().hasAttrSomewhere(Attribute::Nest) &&
2040 !
F.hasAddressTaken()) {
2057 bool Changed =
false;
2064 if (GV.hasInitializer())
2065 if (
auto *
C = dyn_cast<Constant>(GV.getInitializer())) {
2066 auto &
DL = M.getDataLayout();
2072 GV.setInitializer(New);
2080 Changed |=
processGlobal(GV, GetTTI, GetTLI, LookupDomTree);
2090 if (
F->isDeclaration())
2099 ++NumCtorsEvaluated;
2104 <<
F->getName() <<
"' to " << NewInitializers.size()
2106 for (
const auto &Pair : NewInitializers)
2107 Pair.first->setInitializer(Pair.second);
2109 GV->setConstant(
true);
2124 V.eraseFromParent();
2139 ArrayType *ATy = ArrayType::get(Int8PtrTy, UsedArray.
size());
2141 Module *M = V.getParent();
2142 V.removeFromParent();
2147 NV->setSection(
"llvm.metadata");
2167 CompilerUsed = {Vec.
begin(), Vec.
end()};
2173 iterator usedBegin() {
return Used.begin(); }
2174 iterator usedEnd() {
return Used.end(); }
2176 used_iterator_range used() {
2177 return used_iterator_range(usedBegin(), usedEnd());
2180 iterator compilerUsedBegin() {
return CompilerUsed.
begin(); }
2181 iterator compilerUsedEnd() {
return CompilerUsed.
end(); }
2183 used_iterator_range compilerUsed() {
2184 return used_iterator_range(compilerUsedBegin(), compilerUsedEnd());
2190 return CompilerUsed.
count(GV);
2198 return CompilerUsed.
insert(GV).second;
2201 void syncVariablesAndSets() {
2215 assert((!U.usedCount(&GA) || !U.compilerUsedCount(&GA)) &&
2216 "We should have removed the duplicated "
2217 "element from llvm.compiler.used");
2224 return !U.usedCount(&GA) && !U.compilerUsedCount(&GA);
2228 const LLVMUsed &U) {
2230 assert((!U.usedCount(&V) || !U.compilerUsedCount(&V)) &&
2231 "We should have removed the duplicated "
2232 "element from llvm.compiler.used");
2233 if (U.usedCount(&V) || U.compilerUsedCount(&V))
2235 return V.hasNUsesOrMore(
N);
2242 return U.usedCount(&GA) || U.compilerUsedCount(&GA);
2246 bool &RenameTarget) {
2247 RenameTarget =
false;
2264 if (!
Target->hasLocalLinkage())
2273 RenameTarget =
true;
2280 bool Changed =
false;
2284 Used.compilerUsedErase(GV);
2295 if (!J.hasName() && !J.isDeclaration() && !J.hasLocalLinkage())
2304 if (!IsModuleLocal(J))
2307 Constant *Aliasee = J.getAliasee();
2318 Target->removeDeadConstantUsers();
2326 ++NumAliasesResolved;
2332 Target->setLinkage(J.getLinkage());
2333 Target->setDSOLocal(J.isDSOLocal());
2334 Target->setVisibility(J.getVisibility());
2335 Target->setDLLStorageClass(J.getDLLStorageClass());
2337 if (Used.usedErase(&J))
2340 if (Used.compilerUsedErase(&J))
2341 Used.compilerUsedInsert(
Target);
2347 ++NumAliasesRemoved;
2351 Used.syncVariablesAndSets();
2359 auto FuncIter = M.begin();
2360 if (FuncIter == M.end())
2362 auto *TLI = &GetTLI(*FuncIter);
2368 Function *Fn = M.getFunction(TLI->getName(
F));
2376 if (!TLI->getLibFunc(*Fn,
F) ||
F != LibFunc_cxa_atexit)
2393 if (
I.isDebugOrPseudoInst())
2395 if (isa<ReturnInst>(
I))
2417 bool Changed =
false;
2423 CallInst *CI = dyn_cast<CallInst>(U);
2436 ++NumCXXDtorsRemoved;
2453 bool Changed =
false;
2454 bool LocalChange =
true;
2455 std::optional<uint32_t> FirstNotFullyEvaluatedPriority;
2457 while (LocalChange) {
2458 LocalChange =
false;
2460 NotDiscardableComdats.
clear();
2464 NotDiscardableComdats.
insert(
C);
2466 if (
const Comdat *
C =
F.getComdat())
2467 if (!
F.isDefTriviallyDead())
2468 NotDiscardableComdats.
insert(
C);
2470 if (
const Comdat *
C = GA.getComdat())
2471 if (!GA.isDiscardableIfUnused() || !GA.use_empty())
2472 NotDiscardableComdats.
insert(
C);
2476 NotDiscardableComdats, ChangedCFGCallback,
2482 if (FirstNotFullyEvaluatedPriority &&
2483 *FirstNotFullyEvaluatedPriority != Priority)
2487 FirstNotFullyEvaluatedPriority = Priority;
2493 NotDiscardableComdats);
2504 Changed |= LocalChange;
2514 auto &
DL = M.getDataLayout();
2536 ChangedCFGCallback, DeleteFnCallback))
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
SmallPtrSet< MachineInstr *, 2 > Uses
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.
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 bool hasMoreThanOneUseOtherThanLLVMUsed(GlobalValue &V, const LLVMUsed &U)
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 mayHaveOtherReferences(GlobalAlias &GA, const LLVMUsed &U)
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 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.
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::...