1 //===- Function.cpp - Implement the Global object classes -----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Function class for the IR library.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/IR/Function.h"
15 #include "SymbolTableListTraitsImpl.h"
16 #include "llvm/ADT/ArrayRef.h"
17 #include "llvm/ADT/DenseSet.h"
18 #include "llvm/ADT/None.h"
19 #include "llvm/ADT/STLExtras.h"
20 #include "llvm/ADT/SmallString.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/ADT/StringExtras.h"
23 #include "llvm/ADT/StringRef.h"
24 #include "llvm/IR/Argument.h"
25 #include "llvm/IR/Attributes.h"
26 #include "llvm/IR/BasicBlock.h"
27 #include "llvm/IR/Constant.h"
28 #include "llvm/IR/Constants.h"
29 #include "llvm/IR/DerivedTypes.h"
30 #include "llvm/IR/GlobalValue.h"
31 #include "llvm/IR/InstIterator.h"
32 #include "llvm/IR/Instruction.h"
33 #include "llvm/IR/Instructions.h"
34 #include "llvm/IR/IntrinsicInst.h"
35 #include "llvm/IR/Intrinsics.h"
36 #include "llvm/IR/LLVMContext.h"
37 #include "llvm/IR/MDBuilder.h"
38 #include "llvm/IR/Metadata.h"
39 #include "llvm/IR/Module.h"
40 #include "llvm/IR/SymbolTableListTraits.h"
41 #include "llvm/IR/Type.h"
42 #include "llvm/IR/Use.h"
43 #include "llvm/IR/User.h"
44 #include "llvm/IR/Value.h"
45 #include "llvm/IR/ValueSymbolTable.h"
46 #include "llvm/Support/Casting.h"
47 #include "llvm/Support/Compiler.h"
48 #include "llvm/Support/ErrorHandling.h"
57 using ProfileCount = Function::ProfileCount;
59 // Explicit instantiations of SymbolTableListTraits since some of the methods
60 // are not in the public header file...
61 template class llvm::SymbolTableListTraits<BasicBlock>;
63 //===----------------------------------------------------------------------===//
64 // Argument Implementation
65 //===----------------------------------------------------------------------===//
67 Argument::Argument(Type *Ty, const Twine &Name, Function *Par, unsigned ArgNo)
68 : Value(Ty, Value::ArgumentVal), Parent(Par), ArgNo(ArgNo) {
72 void Argument::setParent(Function *parent) {
76 bool Argument::hasNonNullAttr() const {
77 if (!getType()->isPointerTy()) return false;
78 if (getParent()->hasParamAttribute(getArgNo(), Attribute::NonNull))
80 else if (getDereferenceableBytes() > 0 &&
81 !NullPointerIsDefined(getParent(),
82 getType()->getPointerAddressSpace()))
87 bool Argument::hasByValAttr() const {
88 if (!getType()->isPointerTy()) return false;
89 return hasAttribute(Attribute::ByVal);
92 bool Argument::hasSwiftSelfAttr() const {
93 return getParent()->hasParamAttribute(getArgNo(), Attribute::SwiftSelf);
96 bool Argument::hasSwiftErrorAttr() const {
97 return getParent()->hasParamAttribute(getArgNo(), Attribute::SwiftError);
100 bool Argument::hasInAllocaAttr() const {
101 if (!getType()->isPointerTy()) return false;
102 return hasAttribute(Attribute::InAlloca);
105 bool Argument::hasByValOrInAllocaAttr() const {
106 if (!getType()->isPointerTy()) return false;
107 AttributeList Attrs = getParent()->getAttributes();
108 return Attrs.hasParamAttribute(getArgNo(), Attribute::ByVal) ||
109 Attrs.hasParamAttribute(getArgNo(), Attribute::InAlloca);
112 unsigned Argument::getParamAlignment() const {
113 assert(getType()->isPointerTy() && "Only pointers have alignments");
114 return getParent()->getParamAlignment(getArgNo());
117 uint64_t Argument::getDereferenceableBytes() const {
118 assert(getType()->isPointerTy() &&
119 "Only pointers have dereferenceable bytes");
120 return getParent()->getParamDereferenceableBytes(getArgNo());
123 uint64_t Argument::getDereferenceableOrNullBytes() const {
124 assert(getType()->isPointerTy() &&
125 "Only pointers have dereferenceable bytes");
126 return getParent()->getParamDereferenceableOrNullBytes(getArgNo());
129 bool Argument::hasNestAttr() const {
130 if (!getType()->isPointerTy()) return false;
131 return hasAttribute(Attribute::Nest);
134 bool Argument::hasNoAliasAttr() const {
135 if (!getType()->isPointerTy()) return false;
136 return hasAttribute(Attribute::NoAlias);
139 bool Argument::hasNoCaptureAttr() const {
140 if (!getType()->isPointerTy()) return false;
141 return hasAttribute(Attribute::NoCapture);
144 bool Argument::hasStructRetAttr() const {
145 if (!getType()->isPointerTy()) return false;
146 return hasAttribute(Attribute::StructRet);
149 bool Argument::hasReturnedAttr() const {
150 return hasAttribute(Attribute::Returned);
153 bool Argument::hasZExtAttr() const {
154 return hasAttribute(Attribute::ZExt);
157 bool Argument::hasSExtAttr() const {
158 return hasAttribute(Attribute::SExt);
161 bool Argument::onlyReadsMemory() const {
162 AttributeList Attrs = getParent()->getAttributes();
163 return Attrs.hasParamAttribute(getArgNo(), Attribute::ReadOnly) ||
164 Attrs.hasParamAttribute(getArgNo(), Attribute::ReadNone);
167 void Argument::addAttrs(AttrBuilder &B) {
168 AttributeList AL = getParent()->getAttributes();
169 AL = AL.addParamAttributes(Parent->getContext(), getArgNo(), B);
170 getParent()->setAttributes(AL);
173 void Argument::addAttr(Attribute::AttrKind Kind) {
174 getParent()->addParamAttr(getArgNo(), Kind);
177 void Argument::addAttr(Attribute Attr) {
178 getParent()->addParamAttr(getArgNo(), Attr);
181 void Argument::removeAttr(Attribute::AttrKind Kind) {
182 getParent()->removeParamAttr(getArgNo(), Kind);
185 bool Argument::hasAttribute(Attribute::AttrKind Kind) const {
186 return getParent()->hasParamAttribute(getArgNo(), Kind);
189 //===----------------------------------------------------------------------===//
190 // Helper Methods in Function
191 //===----------------------------------------------------------------------===//
193 LLVMContext &Function::getContext() const {
194 return getType()->getContext();
197 unsigned Function::getInstructionCount() const {
198 unsigned NumInstrs = 0;
199 for (const BasicBlock &BB : BasicBlocks)
200 NumInstrs += std::distance(BB.instructionsWithoutDebug().begin(),
201 BB.instructionsWithoutDebug().end());
205 Function *Function::Create(FunctionType *Ty, LinkageTypes Linkage,
206 const Twine &N, Module &M) {
207 return Create(Ty, Linkage, M.getDataLayout().getProgramAddressSpace(), N, &M);
210 void Function::removeFromParent() {
211 getParent()->getFunctionList().remove(getIterator());
214 void Function::eraseFromParent() {
215 getParent()->getFunctionList().erase(getIterator());
218 //===----------------------------------------------------------------------===//
219 // Function Implementation
220 //===----------------------------------------------------------------------===//
222 static unsigned computeAddrSpace(unsigned AddrSpace, Module *M) {
223 // If AS == -1 and we are passed a valid module pointer we place the function
224 // in the program address space. Otherwise we default to AS0.
225 if (AddrSpace == static_cast<unsigned>(-1))
226 return M ? M->getDataLayout().getProgramAddressSpace() : 0;
230 Function::Function(FunctionType *Ty, LinkageTypes Linkage, unsigned AddrSpace,
231 const Twine &name, Module *ParentModule)
232 : GlobalObject(Ty, Value::FunctionVal,
233 OperandTraits<Function>::op_begin(this), 0, Linkage, name,
234 computeAddrSpace(AddrSpace, ParentModule)),
235 NumArgs(Ty->getNumParams()) {
236 assert(FunctionType::isValidReturnType(getReturnType()) &&
237 "invalid return type");
238 setGlobalObjectSubClassData(0);
240 // We only need a symbol table for a function if the context keeps value names
241 if (!getContext().shouldDiscardValueNames())
242 SymTab = make_unique<ValueSymbolTable>();
244 // If the function has arguments, mark them as lazily built.
245 if (Ty->getNumParams())
246 setValueSubclassData(1); // Set the "has lazy arguments" bit.
249 ParentModule->getFunctionList().push_back(this);
251 HasLLVMReservedName = getName().startswith("llvm.");
252 // Ensure intrinsics have the right parameter attributes.
253 // Note, the IntID field will have been set in Value::setName if this function
254 // name is a valid intrinsic ID.
256 setAttributes(Intrinsic::getAttributes(getContext(), IntID));
259 Function::~Function() {
260 dropAllReferences(); // After this it is safe to delete instructions.
262 // Delete all of the method arguments and unlink from symbol table...
266 // Remove the function from the on-the-side GC table.
270 void Function::BuildLazyArguments() const {
271 // Create the arguments vector, all arguments start out unnamed.
272 auto *FT = getFunctionType();
274 Arguments = std::allocator<Argument>().allocate(NumArgs);
275 for (unsigned i = 0, e = NumArgs; i != e; ++i) {
276 Type *ArgTy = FT->getParamType(i);
277 assert(!ArgTy->isVoidTy() && "Cannot have void typed arguments!");
278 new (Arguments + i) Argument(ArgTy, "", const_cast<Function *>(this), i);
282 // Clear the lazy arguments bit.
283 unsigned SDC = getSubclassDataFromValue();
284 const_cast<Function*>(this)->setValueSubclassData(SDC &= ~(1<<0));
285 assert(!hasLazyArguments());
288 static MutableArrayRef<Argument> makeArgArray(Argument *Args, size_t Count) {
289 return MutableArrayRef<Argument>(Args, Count);
292 void Function::clearArguments() {
293 for (Argument &A : makeArgArray(Arguments, NumArgs)) {
297 std::allocator<Argument>().deallocate(Arguments, NumArgs);
301 void Function::stealArgumentListFrom(Function &Src) {
302 assert(isDeclaration() && "Expected no references to current arguments");
304 // Drop the current arguments, if any, and set the lazy argument bit.
305 if (!hasLazyArguments()) {
306 assert(llvm::all_of(makeArgArray(Arguments, NumArgs),
307 [](const Argument &A) { return A.use_empty(); }) &&
308 "Expected arguments to be unused in declaration");
310 setValueSubclassData(getSubclassDataFromValue() | (1 << 0));
313 // Nothing to steal if Src has lazy arguments.
314 if (Src.hasLazyArguments())
317 // Steal arguments from Src, and fix the lazy argument bits.
318 assert(arg_size() == Src.arg_size());
319 Arguments = Src.Arguments;
320 Src.Arguments = nullptr;
321 for (Argument &A : makeArgArray(Arguments, NumArgs)) {
322 // FIXME: This does the work of transferNodesFromList inefficiently.
323 SmallString<128> Name;
333 setValueSubclassData(getSubclassDataFromValue() & ~(1 << 0));
334 assert(!hasLazyArguments());
335 Src.setValueSubclassData(Src.getSubclassDataFromValue() | (1 << 0));
338 // dropAllReferences() - This function causes all the subinstructions to "let
339 // go" of all references that they are maintaining. This allows one to
340 // 'delete' a whole class at a time, even though there may be circular
341 // references... first all references are dropped, and all use counts go to
342 // zero. Then everything is deleted for real. Note that no operations are
343 // valid on an object that has "dropped all references", except operator
346 void Function::dropAllReferences() {
347 setIsMaterializable(false);
349 for (BasicBlock &BB : *this)
350 BB.dropAllReferences();
352 // Delete all basic blocks. They are now unused, except possibly by
353 // blockaddresses, but BasicBlock's destructor takes care of those.
354 while (!BasicBlocks.empty())
355 BasicBlocks.begin()->eraseFromParent();
357 // Drop uses of any optional data (real or placeholder).
358 if (getNumOperands()) {
359 User::dropAllReferences();
360 setNumHungOffUseOperands(0);
361 setValueSubclassData(getSubclassDataFromValue() & ~0xe);
364 // Metadata is stored in a side-table.
368 void Function::addAttribute(unsigned i, Attribute::AttrKind Kind) {
369 AttributeList PAL = getAttributes();
370 PAL = PAL.addAttribute(getContext(), i, Kind);
374 void Function::addAttribute(unsigned i, Attribute Attr) {
375 AttributeList PAL = getAttributes();
376 PAL = PAL.addAttribute(getContext(), i, Attr);
380 void Function::addAttributes(unsigned i, const AttrBuilder &Attrs) {
381 AttributeList PAL = getAttributes();
382 PAL = PAL.addAttributes(getContext(), i, Attrs);
386 void Function::addParamAttr(unsigned ArgNo, Attribute::AttrKind Kind) {
387 AttributeList PAL = getAttributes();
388 PAL = PAL.addParamAttribute(getContext(), ArgNo, Kind);
392 void Function::addParamAttr(unsigned ArgNo, Attribute Attr) {
393 AttributeList PAL = getAttributes();
394 PAL = PAL.addParamAttribute(getContext(), ArgNo, Attr);
398 void Function::addParamAttrs(unsigned ArgNo, const AttrBuilder &Attrs) {
399 AttributeList PAL = getAttributes();
400 PAL = PAL.addParamAttributes(getContext(), ArgNo, Attrs);
404 void Function::removeAttribute(unsigned i, Attribute::AttrKind Kind) {
405 AttributeList PAL = getAttributes();
406 PAL = PAL.removeAttribute(getContext(), i, Kind);
410 void Function::removeAttribute(unsigned i, StringRef Kind) {
411 AttributeList PAL = getAttributes();
412 PAL = PAL.removeAttribute(getContext(), i, Kind);
416 void Function::removeAttributes(unsigned i, const AttrBuilder &Attrs) {
417 AttributeList PAL = getAttributes();
418 PAL = PAL.removeAttributes(getContext(), i, Attrs);
422 void Function::removeParamAttr(unsigned ArgNo, Attribute::AttrKind Kind) {
423 AttributeList PAL = getAttributes();
424 PAL = PAL.removeParamAttribute(getContext(), ArgNo, Kind);
428 void Function::removeParamAttr(unsigned ArgNo, StringRef Kind) {
429 AttributeList PAL = getAttributes();
430 PAL = PAL.removeParamAttribute(getContext(), ArgNo, Kind);
434 void Function::removeParamAttrs(unsigned ArgNo, const AttrBuilder &Attrs) {
435 AttributeList PAL = getAttributes();
436 PAL = PAL.removeParamAttributes(getContext(), ArgNo, Attrs);
440 void Function::addDereferenceableAttr(unsigned i, uint64_t Bytes) {
441 AttributeList PAL = getAttributes();
442 PAL = PAL.addDereferenceableAttr(getContext(), i, Bytes);
446 void Function::addDereferenceableParamAttr(unsigned ArgNo, uint64_t Bytes) {
447 AttributeList PAL = getAttributes();
448 PAL = PAL.addDereferenceableParamAttr(getContext(), ArgNo, Bytes);
452 void Function::addDereferenceableOrNullAttr(unsigned i, uint64_t Bytes) {
453 AttributeList PAL = getAttributes();
454 PAL = PAL.addDereferenceableOrNullAttr(getContext(), i, Bytes);
458 void Function::addDereferenceableOrNullParamAttr(unsigned ArgNo,
460 AttributeList PAL = getAttributes();
461 PAL = PAL.addDereferenceableOrNullParamAttr(getContext(), ArgNo, Bytes);
465 const std::string &Function::getGC() const {
466 assert(hasGC() && "Function has no collector");
467 return getContext().getGC(*this);
470 void Function::setGC(std::string Str) {
471 setValueSubclassDataBit(14, !Str.empty());
472 getContext().setGC(*this, std::move(Str));
475 void Function::clearGC() {
478 getContext().deleteGC(*this);
479 setValueSubclassDataBit(14, false);
482 /// Copy all additional attributes (those not needed to create a Function) from
483 /// the Function Src to this one.
484 void Function::copyAttributesFrom(const Function *Src) {
485 GlobalObject::copyAttributesFrom(Src);
486 setCallingConv(Src->getCallingConv());
487 setAttributes(Src->getAttributes());
492 if (Src->hasPersonalityFn())
493 setPersonalityFn(Src->getPersonalityFn());
494 if (Src->hasPrefixData())
495 setPrefixData(Src->getPrefixData());
496 if (Src->hasPrologueData())
497 setPrologueData(Src->getPrologueData());
500 /// Table of string intrinsic names indexed by enum value.
501 static const char * const IntrinsicNameTable[] = {
503 #define GET_INTRINSIC_NAME_TABLE
504 #include "llvm/IR/IntrinsicImpl.inc"
505 #undef GET_INTRINSIC_NAME_TABLE
508 /// Table of per-target intrinsic name tables.
509 #define GET_INTRINSIC_TARGET_DATA
510 #include "llvm/IR/IntrinsicImpl.inc"
511 #undef GET_INTRINSIC_TARGET_DATA
513 /// Find the segment of \c IntrinsicNameTable for intrinsics with the same
514 /// target as \c Name, or the generic table if \c Name is not target specific.
516 /// Returns the relevant slice of \c IntrinsicNameTable
517 static ArrayRef<const char *> findTargetSubtable(StringRef Name) {
518 assert(Name.startswith("llvm."));
520 ArrayRef<IntrinsicTargetInfo> Targets(TargetInfos);
521 // Drop "llvm." and take the first dotted component. That will be the target
522 // if this is target specific.
523 StringRef Target = Name.drop_front(5).split('.').first;
524 auto It = std::lower_bound(Targets.begin(), Targets.end(), Target,
525 [](const IntrinsicTargetInfo &TI,
526 StringRef Target) { return TI.Name < Target; });
527 // We've either found the target or just fall back to the generic set, which
529 const auto &TI = It != Targets.end() && It->Name == Target ? *It : Targets[0];
530 return makeArrayRef(&IntrinsicNameTable[1] + TI.Offset, TI.Count);
533 /// This does the actual lookup of an intrinsic ID which
534 /// matches the given function name.
535 Intrinsic::ID Function::lookupIntrinsicID(StringRef Name) {
536 ArrayRef<const char *> NameTable = findTargetSubtable(Name);
537 int Idx = Intrinsic::lookupLLVMIntrinsicByName(NameTable, Name);
539 return Intrinsic::not_intrinsic;
541 // Intrinsic IDs correspond to the location in IntrinsicNameTable, but we have
542 // an index into a sub-table.
543 int Adjust = NameTable.data() - IntrinsicNameTable;
544 Intrinsic::ID ID = static_cast<Intrinsic::ID>(Idx + Adjust);
546 // If the intrinsic is not overloaded, require an exact match. If it is
547 // overloaded, require either exact or prefix match.
548 const auto MatchSize = strlen(NameTable[Idx]);
549 assert(Name.size() >= MatchSize && "Expected either exact or prefix match");
550 bool IsExactMatch = Name.size() == MatchSize;
551 return IsExactMatch || isOverloaded(ID) ? ID : Intrinsic::not_intrinsic;
554 void Function::recalculateIntrinsicID() {
555 StringRef Name = getName();
556 if (!Name.startswith("llvm.")) {
557 HasLLVMReservedName = false;
558 IntID = Intrinsic::not_intrinsic;
561 HasLLVMReservedName = true;
562 IntID = lookupIntrinsicID(Name);
565 /// Returns a stable mangling for the type specified for use in the name
566 /// mangling scheme used by 'any' types in intrinsic signatures. The mangling
567 /// of named types is simply their name. Manglings for unnamed types consist
568 /// of a prefix ('p' for pointers, 'a' for arrays, 'f_' for functions)
569 /// combined with the mangling of their component types. A vararg function
570 /// type will have a suffix of 'vararg'. Since function types can contain
571 /// other function types, we close a function type mangling with suffix 'f'
572 /// which can't be confused with it's prefix. This ensures we don't have
573 /// collisions between two unrelated function types. Otherwise, you might
574 /// parse ffXX as f(fXX) or f(fX)X. (X is a placeholder for any other type.)
576 static std::string getMangledTypeStr(Type* Ty) {
578 if (PointerType* PTyp = dyn_cast<PointerType>(Ty)) {
579 Result += "p" + utostr(PTyp->getAddressSpace()) +
580 getMangledTypeStr(PTyp->getElementType());
581 } else if (ArrayType* ATyp = dyn_cast<ArrayType>(Ty)) {
582 Result += "a" + utostr(ATyp->getNumElements()) +
583 getMangledTypeStr(ATyp->getElementType());
584 } else if (StructType *STyp = dyn_cast<StructType>(Ty)) {
585 if (!STyp->isLiteral()) {
587 Result += STyp->getName();
590 for (auto Elem : STyp->elements())
591 Result += getMangledTypeStr(Elem);
593 // Ensure nested structs are distinguishable.
595 } else if (FunctionType *FT = dyn_cast<FunctionType>(Ty)) {
596 Result += "f_" + getMangledTypeStr(FT->getReturnType());
597 for (size_t i = 0; i < FT->getNumParams(); i++)
598 Result += getMangledTypeStr(FT->getParamType(i));
601 // Ensure nested function types are distinguishable.
603 } else if (isa<VectorType>(Ty)) {
604 Result += "v" + utostr(Ty->getVectorNumElements()) +
605 getMangledTypeStr(Ty->getVectorElementType());
607 switch (Ty->getTypeID()) {
608 default: llvm_unreachable("Unhandled type");
609 case Type::VoidTyID: Result += "isVoid"; break;
610 case Type::MetadataTyID: Result += "Metadata"; break;
611 case Type::HalfTyID: Result += "f16"; break;
612 case Type::FloatTyID: Result += "f32"; break;
613 case Type::DoubleTyID: Result += "f64"; break;
614 case Type::X86_FP80TyID: Result += "f80"; break;
615 case Type::FP128TyID: Result += "f128"; break;
616 case Type::PPC_FP128TyID: Result += "ppcf128"; break;
617 case Type::X86_MMXTyID: Result += "x86mmx"; break;
618 case Type::IntegerTyID:
619 Result += "i" + utostr(cast<IntegerType>(Ty)->getBitWidth());
626 StringRef Intrinsic::getName(ID id) {
627 assert(id < num_intrinsics && "Invalid intrinsic ID!");
628 assert(!isOverloaded(id) &&
629 "This version of getName does not support overloading");
630 return IntrinsicNameTable[id];
633 std::string Intrinsic::getName(ID id, ArrayRef<Type*> Tys) {
634 assert(id < num_intrinsics && "Invalid intrinsic ID!");
635 std::string Result(IntrinsicNameTable[id]);
636 for (Type *Ty : Tys) {
637 Result += "." + getMangledTypeStr(Ty);
642 /// IIT_Info - These are enumerators that describe the entries returned by the
643 /// getIntrinsicInfoTableEntries function.
645 /// NOTE: This must be kept in synch with the copy in TblGen/IntrinsicEmitter!
647 // Common values should be encoded with 0-15.
665 // Values from 16+ are only encodable with the inefficient encoding.
670 IIT_EMPTYSTRUCT = 20,
680 IIT_HALF_VEC_ARG = 30,
681 IIT_SAME_VEC_WIDTH_ARG = 31,
684 IIT_VEC_OF_ANYPTRS_TO_ELT = 34,
694 static void DecodeIITType(unsigned &NextElt, ArrayRef<unsigned char> Infos,
695 SmallVectorImpl<Intrinsic::IITDescriptor> &OutputTable) {
696 using namespace Intrinsic;
698 IIT_Info Info = IIT_Info(Infos[NextElt++]);
699 unsigned StructElts = 2;
703 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Void, 0));
706 OutputTable.push_back(IITDescriptor::get(IITDescriptor::VarArg, 0));
709 OutputTable.push_back(IITDescriptor::get(IITDescriptor::MMX, 0));
712 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Token, 0));
715 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Metadata, 0));
718 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Half, 0));
721 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Float, 0));
724 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Double, 0));
727 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Quad, 0));
730 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 1));
733 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 8));
736 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer,16));
739 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 32));
742 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 64));
745 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 128));
748 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 1));
749 DecodeIITType(NextElt, Infos, OutputTable);
752 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 2));
753 DecodeIITType(NextElt, Infos, OutputTable);
756 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 4));
757 DecodeIITType(NextElt, Infos, OutputTable);
760 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 8));
761 DecodeIITType(NextElt, Infos, OutputTable);
764 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 16));
765 DecodeIITType(NextElt, Infos, OutputTable);
768 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 32));
769 DecodeIITType(NextElt, Infos, OutputTable);
772 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 64));
773 DecodeIITType(NextElt, Infos, OutputTable);
776 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 512));
777 DecodeIITType(NextElt, Infos, OutputTable);
780 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 1024));
781 DecodeIITType(NextElt, Infos, OutputTable);
784 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Pointer, 0));
785 DecodeIITType(NextElt, Infos, OutputTable);
787 case IIT_ANYPTR: { // [ANYPTR addrspace, subtype]
788 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Pointer,
790 DecodeIITType(NextElt, Infos, OutputTable);
794 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
795 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Argument, ArgInfo));
798 case IIT_EXTEND_ARG: {
799 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
800 OutputTable.push_back(IITDescriptor::get(IITDescriptor::ExtendArgument,
804 case IIT_TRUNC_ARG: {
805 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
806 OutputTable.push_back(IITDescriptor::get(IITDescriptor::TruncArgument,
810 case IIT_HALF_VEC_ARG: {
811 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
812 OutputTable.push_back(IITDescriptor::get(IITDescriptor::HalfVecArgument,
816 case IIT_SAME_VEC_WIDTH_ARG: {
817 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
818 OutputTable.push_back(IITDescriptor::get(IITDescriptor::SameVecWidthArgument,
822 case IIT_PTR_TO_ARG: {
823 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
824 OutputTable.push_back(IITDescriptor::get(IITDescriptor::PtrToArgument,
828 case IIT_PTR_TO_ELT: {
829 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
830 OutputTable.push_back(IITDescriptor::get(IITDescriptor::PtrToElt, ArgInfo));
833 case IIT_VEC_OF_ANYPTRS_TO_ELT: {
834 unsigned short ArgNo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
835 unsigned short RefNo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
836 OutputTable.push_back(
837 IITDescriptor::get(IITDescriptor::VecOfAnyPtrsToElt, ArgNo, RefNo));
840 case IIT_EMPTYSTRUCT:
841 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Struct, 0));
843 case IIT_STRUCT8: ++StructElts; LLVM_FALLTHROUGH;
844 case IIT_STRUCT7: ++StructElts; LLVM_FALLTHROUGH;
845 case IIT_STRUCT6: ++StructElts; LLVM_FALLTHROUGH;
846 case IIT_STRUCT5: ++StructElts; LLVM_FALLTHROUGH;
847 case IIT_STRUCT4: ++StructElts; LLVM_FALLTHROUGH;
848 case IIT_STRUCT3: ++StructElts; LLVM_FALLTHROUGH;
850 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Struct,StructElts));
852 for (unsigned i = 0; i != StructElts; ++i)
853 DecodeIITType(NextElt, Infos, OutputTable);
857 llvm_unreachable("unhandled");
860 #define GET_INTRINSIC_GENERATOR_GLOBAL
861 #include "llvm/IR/IntrinsicImpl.inc"
862 #undef GET_INTRINSIC_GENERATOR_GLOBAL
864 void Intrinsic::getIntrinsicInfoTableEntries(ID id,
865 SmallVectorImpl<IITDescriptor> &T){
866 // Check to see if the intrinsic's type was expressible by the table.
867 unsigned TableVal = IIT_Table[id-1];
869 // Decode the TableVal into an array of IITValues.
870 SmallVector<unsigned char, 8> IITValues;
871 ArrayRef<unsigned char> IITEntries;
872 unsigned NextElt = 0;
873 if ((TableVal >> 31) != 0) {
874 // This is an offset into the IIT_LongEncodingTable.
875 IITEntries = IIT_LongEncodingTable;
877 // Strip sentinel bit.
878 NextElt = (TableVal << 1) >> 1;
880 // Decode the TableVal into an array of IITValues. If the entry was encoded
881 // into a single word in the table itself, decode it now.
883 IITValues.push_back(TableVal & 0xF);
887 IITEntries = IITValues;
891 // Okay, decode the table into the output vector of IITDescriptors.
892 DecodeIITType(NextElt, IITEntries, T);
893 while (NextElt != IITEntries.size() && IITEntries[NextElt] != 0)
894 DecodeIITType(NextElt, IITEntries, T);
897 static Type *DecodeFixedType(ArrayRef<Intrinsic::IITDescriptor> &Infos,
898 ArrayRef<Type*> Tys, LLVMContext &Context) {
899 using namespace Intrinsic;
901 IITDescriptor D = Infos.front();
902 Infos = Infos.slice(1);
905 case IITDescriptor::Void: return Type::getVoidTy(Context);
906 case IITDescriptor::VarArg: return Type::getVoidTy(Context);
907 case IITDescriptor::MMX: return Type::getX86_MMXTy(Context);
908 case IITDescriptor::Token: return Type::getTokenTy(Context);
909 case IITDescriptor::Metadata: return Type::getMetadataTy(Context);
910 case IITDescriptor::Half: return Type::getHalfTy(Context);
911 case IITDescriptor::Float: return Type::getFloatTy(Context);
912 case IITDescriptor::Double: return Type::getDoubleTy(Context);
913 case IITDescriptor::Quad: return Type::getFP128Ty(Context);
915 case IITDescriptor::Integer:
916 return IntegerType::get(Context, D.Integer_Width);
917 case IITDescriptor::Vector:
918 return VectorType::get(DecodeFixedType(Infos, Tys, Context),D.Vector_Width);
919 case IITDescriptor::Pointer:
920 return PointerType::get(DecodeFixedType(Infos, Tys, Context),
921 D.Pointer_AddressSpace);
922 case IITDescriptor::Struct: {
923 SmallVector<Type *, 8> Elts;
924 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
925 Elts.push_back(DecodeFixedType(Infos, Tys, Context));
926 return StructType::get(Context, Elts);
928 case IITDescriptor::Argument:
929 return Tys[D.getArgumentNumber()];
930 case IITDescriptor::ExtendArgument: {
931 Type *Ty = Tys[D.getArgumentNumber()];
932 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
933 return VectorType::getExtendedElementVectorType(VTy);
935 return IntegerType::get(Context, 2 * cast<IntegerType>(Ty)->getBitWidth());
937 case IITDescriptor::TruncArgument: {
938 Type *Ty = Tys[D.getArgumentNumber()];
939 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
940 return VectorType::getTruncatedElementVectorType(VTy);
942 IntegerType *ITy = cast<IntegerType>(Ty);
943 assert(ITy->getBitWidth() % 2 == 0);
944 return IntegerType::get(Context, ITy->getBitWidth() / 2);
946 case IITDescriptor::HalfVecArgument:
947 return VectorType::getHalfElementsVectorType(cast<VectorType>(
948 Tys[D.getArgumentNumber()]));
949 case IITDescriptor::SameVecWidthArgument: {
950 Type *EltTy = DecodeFixedType(Infos, Tys, Context);
951 Type *Ty = Tys[D.getArgumentNumber()];
952 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
953 return VectorType::get(EltTy, VTy->getNumElements());
955 llvm_unreachable("unhandled");
957 case IITDescriptor::PtrToArgument: {
958 Type *Ty = Tys[D.getArgumentNumber()];
959 return PointerType::getUnqual(Ty);
961 case IITDescriptor::PtrToElt: {
962 Type *Ty = Tys[D.getArgumentNumber()];
963 VectorType *VTy = dyn_cast<VectorType>(Ty);
965 llvm_unreachable("Expected an argument of Vector Type");
966 Type *EltTy = VTy->getVectorElementType();
967 return PointerType::getUnqual(EltTy);
969 case IITDescriptor::VecOfAnyPtrsToElt:
970 // Return the overloaded type (which determines the pointers address space)
971 return Tys[D.getOverloadArgNumber()];
973 llvm_unreachable("unhandled");
976 FunctionType *Intrinsic::getType(LLVMContext &Context,
977 ID id, ArrayRef<Type*> Tys) {
978 SmallVector<IITDescriptor, 8> Table;
979 getIntrinsicInfoTableEntries(id, Table);
981 ArrayRef<IITDescriptor> TableRef = Table;
982 Type *ResultTy = DecodeFixedType(TableRef, Tys, Context);
984 SmallVector<Type*, 8> ArgTys;
985 while (!TableRef.empty())
986 ArgTys.push_back(DecodeFixedType(TableRef, Tys, Context));
988 // DecodeFixedType returns Void for IITDescriptor::Void and IITDescriptor::VarArg
989 // If we see void type as the type of the last argument, it is vararg intrinsic
990 if (!ArgTys.empty() && ArgTys.back()->isVoidTy()) {
992 return FunctionType::get(ResultTy, ArgTys, true);
994 return FunctionType::get(ResultTy, ArgTys, false);
997 bool Intrinsic::isOverloaded(ID id) {
998 #define GET_INTRINSIC_OVERLOAD_TABLE
999 #include "llvm/IR/IntrinsicImpl.inc"
1000 #undef GET_INTRINSIC_OVERLOAD_TABLE
1003 bool Intrinsic::isLeaf(ID id) {
1008 case Intrinsic::experimental_gc_statepoint:
1009 case Intrinsic::experimental_patchpoint_void:
1010 case Intrinsic::experimental_patchpoint_i64:
1015 /// This defines the "Intrinsic::getAttributes(ID id)" method.
1016 #define GET_INTRINSIC_ATTRIBUTES
1017 #include "llvm/IR/IntrinsicImpl.inc"
1018 #undef GET_INTRINSIC_ATTRIBUTES
1020 Function *Intrinsic::getDeclaration(Module *M, ID id, ArrayRef<Type*> Tys) {
1021 // There can never be multiple globals with the same name of different types,
1022 // because intrinsics must be a specific type.
1024 cast<Function>(M->getOrInsertFunction(getName(id, Tys),
1025 getType(M->getContext(), id, Tys)));
1028 // This defines the "Intrinsic::getIntrinsicForGCCBuiltin()" method.
1029 #define GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
1030 #include "llvm/IR/IntrinsicImpl.inc"
1031 #undef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
1033 // This defines the "Intrinsic::getIntrinsicForMSBuiltin()" method.
1034 #define GET_LLVM_INTRINSIC_FOR_MS_BUILTIN
1035 #include "llvm/IR/IntrinsicImpl.inc"
1036 #undef GET_LLVM_INTRINSIC_FOR_MS_BUILTIN
1038 bool Intrinsic::matchIntrinsicType(Type *Ty, ArrayRef<Intrinsic::IITDescriptor> &Infos,
1039 SmallVectorImpl<Type*> &ArgTys) {
1040 using namespace Intrinsic;
1042 // If we ran out of descriptors, there are too many arguments.
1043 if (Infos.empty()) return true;
1044 IITDescriptor D = Infos.front();
1045 Infos = Infos.slice(1);
1048 case IITDescriptor::Void: return !Ty->isVoidTy();
1049 case IITDescriptor::VarArg: return true;
1050 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
1051 case IITDescriptor::Token: return !Ty->isTokenTy();
1052 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
1053 case IITDescriptor::Half: return !Ty->isHalfTy();
1054 case IITDescriptor::Float: return !Ty->isFloatTy();
1055 case IITDescriptor::Double: return !Ty->isDoubleTy();
1056 case IITDescriptor::Quad: return !Ty->isFP128Ty();
1057 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
1058 case IITDescriptor::Vector: {
1059 VectorType *VT = dyn_cast<VectorType>(Ty);
1060 return !VT || VT->getNumElements() != D.Vector_Width ||
1061 matchIntrinsicType(VT->getElementType(), Infos, ArgTys);
1063 case IITDescriptor::Pointer: {
1064 PointerType *PT = dyn_cast<PointerType>(Ty);
1065 return !PT || PT->getAddressSpace() != D.Pointer_AddressSpace ||
1066 matchIntrinsicType(PT->getElementType(), Infos, ArgTys);
1069 case IITDescriptor::Struct: {
1070 StructType *ST = dyn_cast<StructType>(Ty);
1071 if (!ST || ST->getNumElements() != D.Struct_NumElements)
1074 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
1075 if (matchIntrinsicType(ST->getElementType(i), Infos, ArgTys))
1080 case IITDescriptor::Argument:
1081 // Two cases here - If this is the second occurrence of an argument, verify
1082 // that the later instance matches the previous instance.
1083 if (D.getArgumentNumber() < ArgTys.size())
1084 return Ty != ArgTys[D.getArgumentNumber()];
1086 // Otherwise, if this is the first instance of an argument, record it and
1087 // verify the "Any" kind.
1088 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
1089 ArgTys.push_back(Ty);
1091 switch (D.getArgumentKind()) {
1092 case IITDescriptor::AK_Any: return false; // Success
1093 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
1094 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
1095 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
1096 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
1098 llvm_unreachable("all argument kinds not covered");
1100 case IITDescriptor::ExtendArgument: {
1101 // This may only be used when referring to a previous vector argument.
1102 if (D.getArgumentNumber() >= ArgTys.size())
1105 Type *NewTy = ArgTys[D.getArgumentNumber()];
1106 if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
1107 NewTy = VectorType::getExtendedElementVectorType(VTy);
1108 else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
1109 NewTy = IntegerType::get(ITy->getContext(), 2 * ITy->getBitWidth());
1115 case IITDescriptor::TruncArgument: {
1116 // This may only be used when referring to a previous vector argument.
1117 if (D.getArgumentNumber() >= ArgTys.size())
1120 Type *NewTy = ArgTys[D.getArgumentNumber()];
1121 if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
1122 NewTy = VectorType::getTruncatedElementVectorType(VTy);
1123 else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
1124 NewTy = IntegerType::get(ITy->getContext(), ITy->getBitWidth() / 2);
1130 case IITDescriptor::HalfVecArgument:
1131 // This may only be used when referring to a previous vector argument.
1132 return D.getArgumentNumber() >= ArgTys.size() ||
1133 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
1134 VectorType::getHalfElementsVectorType(
1135 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
1136 case IITDescriptor::SameVecWidthArgument: {
1137 if (D.getArgumentNumber() >= ArgTys.size())
1139 VectorType * ReferenceType =
1140 dyn_cast<VectorType>(ArgTys[D.getArgumentNumber()]);
1141 VectorType *ThisArgType = dyn_cast<VectorType>(Ty);
1142 if (!ThisArgType || !ReferenceType ||
1143 (ReferenceType->getVectorNumElements() !=
1144 ThisArgType->getVectorNumElements()))
1146 return matchIntrinsicType(ThisArgType->getVectorElementType(),
1149 case IITDescriptor::PtrToArgument: {
1150 if (D.getArgumentNumber() >= ArgTys.size())
1152 Type * ReferenceType = ArgTys[D.getArgumentNumber()];
1153 PointerType *ThisArgType = dyn_cast<PointerType>(Ty);
1154 return (!ThisArgType || ThisArgType->getElementType() != ReferenceType);
1156 case IITDescriptor::PtrToElt: {
1157 if (D.getArgumentNumber() >= ArgTys.size())
1159 VectorType * ReferenceType =
1160 dyn_cast<VectorType> (ArgTys[D.getArgumentNumber()]);
1161 PointerType *ThisArgType = dyn_cast<PointerType>(Ty);
1163 return (!ThisArgType || !ReferenceType ||
1164 ThisArgType->getElementType() != ReferenceType->getElementType());
1166 case IITDescriptor::VecOfAnyPtrsToElt: {
1167 unsigned RefArgNumber = D.getRefArgNumber();
1169 // This may only be used when referring to a previous argument.
1170 if (RefArgNumber >= ArgTys.size())
1173 // Record the overloaded type
1174 assert(D.getOverloadArgNumber() == ArgTys.size() &&
1175 "Table consistency error");
1176 ArgTys.push_back(Ty);
1178 // Verify the overloaded type "matches" the Ref type.
1179 // i.e. Ty is a vector with the same width as Ref.
1180 // Composed of pointers to the same element type as Ref.
1181 VectorType *ReferenceType = dyn_cast<VectorType>(ArgTys[RefArgNumber]);
1182 VectorType *ThisArgVecTy = dyn_cast<VectorType>(Ty);
1183 if (!ThisArgVecTy || !ReferenceType ||
1184 (ReferenceType->getVectorNumElements() !=
1185 ThisArgVecTy->getVectorNumElements()))
1187 PointerType *ThisArgEltTy =
1188 dyn_cast<PointerType>(ThisArgVecTy->getVectorElementType());
1191 return ThisArgEltTy->getElementType() !=
1192 ReferenceType->getVectorElementType();
1195 llvm_unreachable("unhandled");
1199 Intrinsic::matchIntrinsicVarArg(bool isVarArg,
1200 ArrayRef<Intrinsic::IITDescriptor> &Infos) {
1201 // If there are no descriptors left, then it can't be a vararg.
1205 // There should be only one descriptor remaining at this point.
1206 if (Infos.size() != 1)
1209 // Check and verify the descriptor.
1210 IITDescriptor D = Infos.front();
1211 Infos = Infos.slice(1);
1212 if (D.Kind == IITDescriptor::VarArg)
1218 Optional<Function*> Intrinsic::remangleIntrinsicFunction(Function *F) {
1219 Intrinsic::ID ID = F->getIntrinsicID();
1223 FunctionType *FTy = F->getFunctionType();
1224 // Accumulate an array of overloaded types for the given intrinsic
1225 SmallVector<Type *, 4> ArgTys;
1227 SmallVector<Intrinsic::IITDescriptor, 8> Table;
1228 getIntrinsicInfoTableEntries(ID, Table);
1229 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
1231 // If we encounter any problems matching the signature with the descriptor
1232 // just give up remangling. It's up to verifier to report the discrepancy.
1233 if (Intrinsic::matchIntrinsicType(FTy->getReturnType(), TableRef, ArgTys))
1235 for (auto Ty : FTy->params())
1236 if (Intrinsic::matchIntrinsicType(Ty, TableRef, ArgTys))
1238 if (Intrinsic::matchIntrinsicVarArg(FTy->isVarArg(), TableRef))
1242 StringRef Name = F->getName();
1243 if (Name == Intrinsic::getName(ID, ArgTys))
1246 auto NewDecl = Intrinsic::getDeclaration(F->getParent(), ID, ArgTys);
1247 NewDecl->setCallingConv(F->getCallingConv());
1248 assert(NewDecl->getFunctionType() == FTy && "Shouldn't change the signature");
1252 /// hasAddressTaken - returns true if there are any uses of this function
1253 /// other than direct calls or invokes to it.
1254 bool Function::hasAddressTaken(const User* *PutOffender) const {
1255 for (const Use &U : uses()) {
1256 const User *FU = U.getUser();
1257 if (isa<BlockAddress>(FU))
1259 const auto *Call = dyn_cast<CallBase>(FU);
1265 if (!Call->isCallee(&U)) {
1274 bool Function::isDefTriviallyDead() const {
1275 // Check the linkage
1276 if (!hasLinkOnceLinkage() && !hasLocalLinkage() &&
1277 !hasAvailableExternallyLinkage())
1280 // Check if the function is used by anything other than a blockaddress.
1281 for (const User *U : users())
1282 if (!isa<BlockAddress>(U))
1288 /// callsFunctionThatReturnsTwice - Return true if the function has a call to
1289 /// setjmp or other function that gcc recognizes as "returning twice".
1290 bool Function::callsFunctionThatReturnsTwice() const {
1291 for (const Instruction &I : instructions(this))
1292 if (const auto *Call = dyn_cast<CallBase>(&I))
1293 if (Call->hasFnAttr(Attribute::ReturnsTwice))
1299 Constant *Function::getPersonalityFn() const {
1300 assert(hasPersonalityFn() && getNumOperands());
1301 return cast<Constant>(Op<0>());
1304 void Function::setPersonalityFn(Constant *Fn) {
1305 setHungoffOperand<0>(Fn);
1306 setValueSubclassDataBit(3, Fn != nullptr);
1309 Constant *Function::getPrefixData() const {
1310 assert(hasPrefixData() && getNumOperands());
1311 return cast<Constant>(Op<1>());
1314 void Function::setPrefixData(Constant *PrefixData) {
1315 setHungoffOperand<1>(PrefixData);
1316 setValueSubclassDataBit(1, PrefixData != nullptr);
1319 Constant *Function::getPrologueData() const {
1320 assert(hasPrologueData() && getNumOperands());
1321 return cast<Constant>(Op<2>());
1324 void Function::setPrologueData(Constant *PrologueData) {
1325 setHungoffOperand<2>(PrologueData);
1326 setValueSubclassDataBit(2, PrologueData != nullptr);
1329 void Function::allocHungoffUselist() {
1330 // If we've already allocated a uselist, stop here.
1331 if (getNumOperands())
1334 allocHungoffUses(3, /*IsPhi=*/ false);
1335 setNumHungOffUseOperands(3);
1337 // Initialize the uselist with placeholder operands to allow traversal.
1338 auto *CPN = ConstantPointerNull::get(Type::getInt1PtrTy(getContext(), 0));
1345 void Function::setHungoffOperand(Constant *C) {
1347 allocHungoffUselist();
1349 } else if (getNumOperands()) {
1351 ConstantPointerNull::get(Type::getInt1PtrTy(getContext(), 0)));
1355 void Function::setValueSubclassDataBit(unsigned Bit, bool On) {
1356 assert(Bit < 16 && "SubclassData contains only 16 bits");
1358 setValueSubclassData(getSubclassDataFromValue() | (1 << Bit));
1360 setValueSubclassData(getSubclassDataFromValue() & ~(1 << Bit));
1363 void Function::setEntryCount(ProfileCount Count,
1364 const DenseSet<GlobalValue::GUID> *S) {
1365 assert(Count.hasValue());
1366 #if !defined(NDEBUG)
1367 auto PrevCount = getEntryCount();
1368 assert(!PrevCount.hasValue() || PrevCount.getType() == Count.getType());
1370 MDBuilder MDB(getContext());
1372 LLVMContext::MD_prof,
1373 MDB.createFunctionEntryCount(Count.getCount(), Count.isSynthetic(), S));
1376 void Function::setEntryCount(uint64_t Count, Function::ProfileCountType Type,
1377 const DenseSet<GlobalValue::GUID> *Imports) {
1378 setEntryCount(ProfileCount(Count, Type), Imports);
1381 ProfileCount Function::getEntryCount() const {
1382 MDNode *MD = getMetadata(LLVMContext::MD_prof);
1383 if (MD && MD->getOperand(0))
1384 if (MDString *MDS = dyn_cast<MDString>(MD->getOperand(0))) {
1385 if (MDS->getString().equals("function_entry_count")) {
1386 ConstantInt *CI = mdconst::extract<ConstantInt>(MD->getOperand(1));
1387 uint64_t Count = CI->getValue().getZExtValue();
1388 // A value of -1 is used for SamplePGO when there were no samples.
1389 // Treat this the same as unknown.
1390 if (Count == (uint64_t)-1)
1391 return ProfileCount::getInvalid();
1392 return ProfileCount(Count, PCT_Real);
1393 } else if (MDS->getString().equals("synthetic_function_entry_count")) {
1394 ConstantInt *CI = mdconst::extract<ConstantInt>(MD->getOperand(1));
1395 uint64_t Count = CI->getValue().getZExtValue();
1396 return ProfileCount(Count, PCT_Synthetic);
1399 return ProfileCount::getInvalid();
1402 DenseSet<GlobalValue::GUID> Function::getImportGUIDs() const {
1403 DenseSet<GlobalValue::GUID> R;
1404 if (MDNode *MD = getMetadata(LLVMContext::MD_prof))
1405 if (MDString *MDS = dyn_cast<MDString>(MD->getOperand(0)))
1406 if (MDS->getString().equals("function_entry_count"))
1407 for (unsigned i = 2; i < MD->getNumOperands(); i++)
1408 R.insert(mdconst::extract<ConstantInt>(MD->getOperand(i))
1414 void Function::setSectionPrefix(StringRef Prefix) {
1415 MDBuilder MDB(getContext());
1416 setMetadata(LLVMContext::MD_section_prefix,
1417 MDB.createFunctionSectionPrefix(Prefix));
1420 Optional<StringRef> Function::getSectionPrefix() const {
1421 if (MDNode *MD = getMetadata(LLVMContext::MD_section_prefix)) {
1422 assert(cast<MDString>(MD->getOperand(0))
1424 .equals("function_section_prefix") &&
1425 "Metadata not match");
1426 return cast<MDString>(MD->getOperand(1))->getString();
1431 bool Function::nullPointerIsDefined() const {
1432 return getFnAttribute("null-pointer-is-valid")
1437 bool llvm::NullPointerIsDefined(const Function *F, unsigned AS) {
1438 if (F && F->nullPointerIsDefined())