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 "LLVMContextImpl.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/SmallString.h"
20 #include "llvm/ADT/SmallVector.h"
21 #include "llvm/ADT/STLExtras.h"
22 #include "llvm/ADT/StringExtras.h"
23 #include "llvm/ADT/StringRef.h"
24 #include "llvm/CodeGen/ValueTypes.h"
25 #include "llvm/IR/Argument.h"
26 #include "llvm/IR/Attributes.h"
27 #include "llvm/IR/BasicBlock.h"
28 #include "llvm/IR/CallSite.h"
29 #include "llvm/IR/Constant.h"
30 #include "llvm/IR/Constants.h"
31 #include "llvm/IR/DerivedTypes.h"
32 #include "llvm/IR/Function.h"
33 #include "llvm/IR/GlobalValue.h"
34 #include "llvm/IR/InstIterator.h"
35 #include "llvm/IR/Instruction.h"
36 #include "llvm/IR/Instructions.h"
37 #include "llvm/IR/IntrinsicInst.h"
38 #include "llvm/IR/Intrinsics.h"
39 #include "llvm/IR/LLVMContext.h"
40 #include "llvm/IR/MDBuilder.h"
41 #include "llvm/IR/Metadata.h"
42 #include "llvm/IR/Module.h"
43 #include "llvm/IR/SymbolTableListTraits.h"
44 #include "llvm/IR/Type.h"
45 #include "llvm/IR/Use.h"
46 #include "llvm/IR/User.h"
47 #include "llvm/IR/Value.h"
48 #include "llvm/IR/ValueSymbolTable.h"
49 #include "llvm/Support/Casting.h"
50 #include "llvm/Support/Compiler.h"
51 #include "llvm/Support/ErrorHandling.h"
61 // Explicit instantiations of SymbolTableListTraits since some of the methods
62 // are not in the public header file...
63 template class llvm::SymbolTableListTraits<BasicBlock>;
65 //===----------------------------------------------------------------------===//
66 // Argument Implementation
67 //===----------------------------------------------------------------------===//
69 Argument::Argument(Type *Ty, const Twine &Name, Function *Par, unsigned ArgNo)
70 : Value(Ty, Value::ArgumentVal), Parent(Par), ArgNo(ArgNo) {
74 void Argument::setParent(Function *parent) {
78 bool Argument::hasNonNullAttr() const {
79 if (!getType()->isPointerTy()) return false;
80 if (getParent()->hasParamAttribute(getArgNo(), Attribute::NonNull))
82 else if (getDereferenceableBytes() > 0 &&
83 getType()->getPointerAddressSpace() == 0)
88 bool Argument::hasByValAttr() const {
89 if (!getType()->isPointerTy()) return false;
90 return hasAttribute(Attribute::ByVal);
93 bool Argument::hasSwiftSelfAttr() const {
94 return getParent()->hasParamAttribute(getArgNo(), Attribute::SwiftSelf);
97 bool Argument::hasSwiftErrorAttr() const {
98 return getParent()->hasParamAttribute(getArgNo(), Attribute::SwiftError);
101 bool Argument::hasInAllocaAttr() const {
102 if (!getType()->isPointerTy()) return false;
103 return hasAttribute(Attribute::InAlloca);
106 bool Argument::hasByValOrInAllocaAttr() const {
107 if (!getType()->isPointerTy()) return false;
108 AttributeList Attrs = getParent()->getAttributes();
109 return Attrs.hasParamAttribute(getArgNo(), Attribute::ByVal) ||
110 Attrs.hasParamAttribute(getArgNo(), Attribute::InAlloca);
113 unsigned Argument::getParamAlignment() const {
114 assert(getType()->isPointerTy() && "Only pointers have alignments");
115 return getParent()->getParamAlignment(getArgNo());
118 uint64_t Argument::getDereferenceableBytes() const {
119 assert(getType()->isPointerTy() &&
120 "Only pointers have dereferenceable bytes");
121 return getParent()->getDereferenceableBytes(getArgNo() +
122 AttributeList::FirstArgIndex);
125 uint64_t Argument::getDereferenceableOrNullBytes() const {
126 assert(getType()->isPointerTy() &&
127 "Only pointers have dereferenceable bytes");
128 return getParent()->getDereferenceableOrNullBytes(
129 getArgNo() + AttributeList::FirstArgIndex);
132 bool Argument::hasNestAttr() const {
133 if (!getType()->isPointerTy()) return false;
134 return hasAttribute(Attribute::Nest);
137 bool Argument::hasNoAliasAttr() const {
138 if (!getType()->isPointerTy()) return false;
139 return hasAttribute(Attribute::NoAlias);
142 bool Argument::hasNoCaptureAttr() const {
143 if (!getType()->isPointerTy()) return false;
144 return hasAttribute(Attribute::NoCapture);
147 bool Argument::hasStructRetAttr() const {
148 if (!getType()->isPointerTy()) return false;
149 return hasAttribute(Attribute::StructRet);
152 bool Argument::hasReturnedAttr() const {
153 return hasAttribute(Attribute::Returned);
156 bool Argument::hasZExtAttr() const {
157 return hasAttribute(Attribute::ZExt);
160 bool Argument::hasSExtAttr() const {
161 return hasAttribute(Attribute::SExt);
164 bool Argument::onlyReadsMemory() const {
165 AttributeList Attrs = getParent()->getAttributes();
166 return Attrs.hasParamAttribute(getArgNo(), Attribute::ReadOnly) ||
167 Attrs.hasParamAttribute(getArgNo(), Attribute::ReadNone);
170 void Argument::addAttrs(AttrBuilder &B) {
171 AttributeList AL = getParent()->getAttributes();
172 AL = AL.addAttributes(Parent->getContext(),
173 getArgNo() + AttributeList::FirstArgIndex, B);
174 getParent()->setAttributes(AL);
177 void Argument::addAttr(Attribute::AttrKind Kind) {
178 getParent()->addAttribute(getArgNo() + AttributeList::FirstArgIndex, Kind);
181 void Argument::addAttr(Attribute Attr) {
182 getParent()->addAttribute(getArgNo() + AttributeList::FirstArgIndex, Attr);
185 void Argument::removeAttr(Attribute::AttrKind Kind) {
186 getParent()->removeAttribute(getArgNo() + AttributeList::FirstArgIndex, Kind);
189 bool Argument::hasAttribute(Attribute::AttrKind Kind) const {
190 return getParent()->hasParamAttribute(getArgNo(), Kind);
193 //===----------------------------------------------------------------------===//
194 // Helper Methods in Function
195 //===----------------------------------------------------------------------===//
197 LLVMContext &Function::getContext() const {
198 return getType()->getContext();
201 void Function::removeFromParent() {
202 getParent()->getFunctionList().remove(getIterator());
205 void Function::eraseFromParent() {
206 getParent()->getFunctionList().erase(getIterator());
209 //===----------------------------------------------------------------------===//
210 // Function Implementation
211 //===----------------------------------------------------------------------===//
213 Function::Function(FunctionType *Ty, LinkageTypes Linkage, const Twine &name,
214 Module *ParentModule)
215 : GlobalObject(Ty, Value::FunctionVal,
216 OperandTraits<Function>::op_begin(this), 0, Linkage, name),
217 NumArgs(Ty->getNumParams()) {
218 assert(FunctionType::isValidReturnType(getReturnType()) &&
219 "invalid return type");
220 setGlobalObjectSubClassData(0);
222 // We only need a symbol table for a function if the context keeps value names
223 if (!getContext().shouldDiscardValueNames())
224 SymTab = make_unique<ValueSymbolTable>();
226 // If the function has arguments, mark them as lazily built.
227 if (Ty->getNumParams())
228 setValueSubclassData(1); // Set the "has lazy arguments" bit.
231 ParentModule->getFunctionList().push_back(this);
233 HasLLVMReservedName = getName().startswith("llvm.");
234 // Ensure intrinsics have the right parameter attributes.
235 // Note, the IntID field will have been set in Value::setName if this function
236 // name is a valid intrinsic ID.
238 setAttributes(Intrinsic::getAttributes(getContext(), IntID));
241 Function::~Function() {
242 dropAllReferences(); // After this it is safe to delete instructions.
244 // Delete all of the method arguments and unlink from symbol table...
248 // Remove the function from the on-the-side GC table.
252 void Function::BuildLazyArguments() const {
253 // Create the arguments vector, all arguments start out unnamed.
254 auto *FT = getFunctionType();
256 Arguments = std::allocator<Argument>().allocate(NumArgs);
257 for (unsigned i = 0, e = NumArgs; i != e; ++i) {
258 Type *ArgTy = FT->getParamType(i);
259 assert(!ArgTy->isVoidTy() && "Cannot have void typed arguments!");
260 new (Arguments + i) Argument(ArgTy, "", const_cast<Function *>(this), i);
264 // Clear the lazy arguments bit.
265 unsigned SDC = getSubclassDataFromValue();
266 const_cast<Function*>(this)->setValueSubclassData(SDC &= ~(1<<0));
267 assert(!hasLazyArguments());
270 static MutableArrayRef<Argument> makeArgArray(Argument *Args, size_t Count) {
271 return MutableArrayRef<Argument>(Args, Count);
274 void Function::clearArguments() {
275 for (Argument &A : makeArgArray(Arguments, NumArgs)) {
279 std::allocator<Argument>().deallocate(Arguments, NumArgs);
283 void Function::stealArgumentListFrom(Function &Src) {
284 assert(isDeclaration() && "Expected no references to current arguments");
286 // Drop the current arguments, if any, and set the lazy argument bit.
287 if (!hasLazyArguments()) {
288 assert(llvm::all_of(makeArgArray(Arguments, NumArgs),
289 [](const Argument &A) { return A.use_empty(); }) &&
290 "Expected arguments to be unused in declaration");
292 setValueSubclassData(getSubclassDataFromValue() | (1 << 0));
295 // Nothing to steal if Src has lazy arguments.
296 if (Src.hasLazyArguments())
299 // Steal arguments from Src, and fix the lazy argument bits.
300 assert(arg_size() == Src.arg_size());
301 Arguments = Src.Arguments;
302 Src.Arguments = nullptr;
303 for (Argument &A : makeArgArray(Arguments, NumArgs)) {
304 // FIXME: This does the work of transferNodesFromList inefficiently.
305 SmallString<128> Name;
315 setValueSubclassData(getSubclassDataFromValue() & ~(1 << 0));
316 assert(!hasLazyArguments());
317 Src.setValueSubclassData(Src.getSubclassDataFromValue() | (1 << 0));
320 // dropAllReferences() - This function causes all the subinstructions to "let
321 // go" of all references that they are maintaining. This allows one to
322 // 'delete' a whole class at a time, even though there may be circular
323 // references... first all references are dropped, and all use counts go to
324 // zero. Then everything is deleted for real. Note that no operations are
325 // valid on an object that has "dropped all references", except operator
328 void Function::dropAllReferences() {
329 setIsMaterializable(false);
331 for (BasicBlock &BB : *this)
332 BB.dropAllReferences();
334 // Delete all basic blocks. They are now unused, except possibly by
335 // blockaddresses, but BasicBlock's destructor takes care of those.
336 while (!BasicBlocks.empty())
337 BasicBlocks.begin()->eraseFromParent();
339 // Drop uses of any optional data (real or placeholder).
340 if (getNumOperands()) {
341 User::dropAllReferences();
342 setNumHungOffUseOperands(0);
343 setValueSubclassData(getSubclassDataFromValue() & ~0xe);
346 // Metadata is stored in a side-table.
350 void Function::addAttribute(unsigned i, Attribute::AttrKind Kind) {
351 AttributeList PAL = getAttributes();
352 PAL = PAL.addAttribute(getContext(), i, Kind);
356 void Function::addAttribute(unsigned i, Attribute Attr) {
357 AttributeList PAL = getAttributes();
358 PAL = PAL.addAttribute(getContext(), i, Attr);
362 void Function::addAttributes(unsigned i, const AttrBuilder &Attrs) {
363 AttributeList PAL = getAttributes();
364 PAL = PAL.addAttributes(getContext(), i, Attrs);
368 void Function::removeAttribute(unsigned i, Attribute::AttrKind Kind) {
369 AttributeList PAL = getAttributes();
370 PAL = PAL.removeAttribute(getContext(), i, Kind);
374 void Function::removeAttribute(unsigned i, StringRef Kind) {
375 AttributeList PAL = getAttributes();
376 PAL = PAL.removeAttribute(getContext(), i, Kind);
380 void Function::removeAttributes(unsigned i, const AttrBuilder &Attrs) {
381 AttributeList PAL = getAttributes();
382 PAL = PAL.removeAttributes(getContext(), i, Attrs);
386 void Function::addDereferenceableAttr(unsigned i, uint64_t Bytes) {
387 AttributeList PAL = getAttributes();
388 PAL = PAL.addDereferenceableAttr(getContext(), i, Bytes);
392 void Function::addDereferenceableOrNullAttr(unsigned i, uint64_t Bytes) {
393 AttributeList PAL = getAttributes();
394 PAL = PAL.addDereferenceableOrNullAttr(getContext(), i, Bytes);
398 const std::string &Function::getGC() const {
399 assert(hasGC() && "Function has no collector");
400 return getContext().getGC(*this);
403 void Function::setGC(std::string Str) {
404 setValueSubclassDataBit(14, !Str.empty());
405 getContext().setGC(*this, std::move(Str));
408 void Function::clearGC() {
411 getContext().deleteGC(*this);
412 setValueSubclassDataBit(14, false);
415 /// Copy all additional attributes (those not needed to create a Function) from
416 /// the Function Src to this one.
417 void Function::copyAttributesFrom(const Function *Src) {
418 GlobalObject::copyAttributesFrom(Src);
419 setCallingConv(Src->getCallingConv());
420 setAttributes(Src->getAttributes());
425 if (Src->hasPersonalityFn())
426 setPersonalityFn(Src->getPersonalityFn());
427 if (Src->hasPrefixData())
428 setPrefixData(Src->getPrefixData());
429 if (Src->hasPrologueData())
430 setPrologueData(Src->getPrologueData());
433 /// Table of string intrinsic names indexed by enum value.
434 static const char * const IntrinsicNameTable[] = {
436 #define GET_INTRINSIC_NAME_TABLE
437 #include "llvm/IR/Intrinsics.gen"
438 #undef GET_INTRINSIC_NAME_TABLE
441 /// Table of per-target intrinsic name tables.
442 #define GET_INTRINSIC_TARGET_DATA
443 #include "llvm/IR/Intrinsics.gen"
444 #undef GET_INTRINSIC_TARGET_DATA
446 /// Find the segment of \c IntrinsicNameTable for intrinsics with the same
447 /// target as \c Name, or the generic table if \c Name is not target specific.
449 /// Returns the relevant slice of \c IntrinsicNameTable
450 static ArrayRef<const char *> findTargetSubtable(StringRef Name) {
451 assert(Name.startswith("llvm."));
453 ArrayRef<IntrinsicTargetInfo> Targets(TargetInfos);
454 // Drop "llvm." and take the first dotted component. That will be the target
455 // if this is target specific.
456 StringRef Target = Name.drop_front(5).split('.').first;
457 auto It = std::lower_bound(Targets.begin(), Targets.end(), Target,
458 [](const IntrinsicTargetInfo &TI,
459 StringRef Target) { return TI.Name < Target; });
460 // We've either found the target or just fall back to the generic set, which
462 const auto &TI = It != Targets.end() && It->Name == Target ? *It : Targets[0];
463 return makeArrayRef(&IntrinsicNameTable[1] + TI.Offset, TI.Count);
466 /// \brief This does the actual lookup of an intrinsic ID which
467 /// matches the given function name.
468 Intrinsic::ID Function::lookupIntrinsicID(StringRef Name) {
469 ArrayRef<const char *> NameTable = findTargetSubtable(Name);
470 int Idx = Intrinsic::lookupLLVMIntrinsicByName(NameTable, Name);
472 return Intrinsic::not_intrinsic;
474 // Intrinsic IDs correspond to the location in IntrinsicNameTable, but we have
475 // an index into a sub-table.
476 int Adjust = NameTable.data() - IntrinsicNameTable;
477 Intrinsic::ID ID = static_cast<Intrinsic::ID>(Idx + Adjust);
479 // If the intrinsic is not overloaded, require an exact match. If it is
480 // overloaded, require a prefix match.
481 bool IsPrefixMatch = Name.size() > strlen(NameTable[Idx]);
482 return IsPrefixMatch == isOverloaded(ID) ? ID : Intrinsic::not_intrinsic;
485 void Function::recalculateIntrinsicID() {
486 StringRef Name = getName();
487 if (!Name.startswith("llvm.")) {
488 HasLLVMReservedName = false;
489 IntID = Intrinsic::not_intrinsic;
492 HasLLVMReservedName = true;
493 IntID = lookupIntrinsicID(Name);
496 /// Returns a stable mangling for the type specified for use in the name
497 /// mangling scheme used by 'any' types in intrinsic signatures. The mangling
498 /// of named types is simply their name. Manglings for unnamed types consist
499 /// of a prefix ('p' for pointers, 'a' for arrays, 'f_' for functions)
500 /// combined with the mangling of their component types. A vararg function
501 /// type will have a suffix of 'vararg'. Since function types can contain
502 /// other function types, we close a function type mangling with suffix 'f'
503 /// which can't be confused with it's prefix. This ensures we don't have
504 /// collisions between two unrelated function types. Otherwise, you might
505 /// parse ffXX as f(fXX) or f(fX)X. (X is a placeholder for any other type.)
506 /// Manglings of integers, floats, and vectors ('i', 'f', and 'v' prefix in most
507 /// cases) fall back to the MVT codepath, where they could be mangled to
508 /// 'x86mmx', for example; matching on derived types is not sufficient to mangle
510 static std::string getMangledTypeStr(Type* Ty) {
512 if (PointerType* PTyp = dyn_cast<PointerType>(Ty)) {
513 Result += "p" + utostr(PTyp->getAddressSpace()) +
514 getMangledTypeStr(PTyp->getElementType());
515 } else if (ArrayType* ATyp = dyn_cast<ArrayType>(Ty)) {
516 Result += "a" + utostr(ATyp->getNumElements()) +
517 getMangledTypeStr(ATyp->getElementType());
518 } else if (StructType *STyp = dyn_cast<StructType>(Ty)) {
519 if (!STyp->isLiteral()) {
521 Result += STyp->getName();
524 for (auto Elem : STyp->elements())
525 Result += getMangledTypeStr(Elem);
527 // Ensure nested structs are distinguishable.
529 } else if (FunctionType *FT = dyn_cast<FunctionType>(Ty)) {
530 Result += "f_" + getMangledTypeStr(FT->getReturnType());
531 for (size_t i = 0; i < FT->getNumParams(); i++)
532 Result += getMangledTypeStr(FT->getParamType(i));
535 // Ensure nested function types are distinguishable.
537 } else if (isa<VectorType>(Ty))
538 Result += "v" + utostr(Ty->getVectorNumElements()) +
539 getMangledTypeStr(Ty->getVectorElementType());
541 Result += EVT::getEVT(Ty).getEVTString();
545 StringRef Intrinsic::getName(ID id) {
546 assert(id < num_intrinsics && "Invalid intrinsic ID!");
547 assert(!isOverloaded(id) &&
548 "This version of getName does not support overloading");
549 return IntrinsicNameTable[id];
552 std::string Intrinsic::getName(ID id, ArrayRef<Type*> Tys) {
553 assert(id < num_intrinsics && "Invalid intrinsic ID!");
554 std::string Result(IntrinsicNameTable[id]);
555 for (Type *Ty : Tys) {
556 Result += "." + getMangledTypeStr(Ty);
561 /// IIT_Info - These are enumerators that describe the entries returned by the
562 /// getIntrinsicInfoTableEntries function.
564 /// NOTE: This must be kept in synch with the copy in TblGen/IntrinsicEmitter!
566 // Common values should be encoded with 0-15.
584 // Values from 16+ are only encodable with the inefficient encoding.
589 IIT_EMPTYSTRUCT = 20,
599 IIT_HALF_VEC_ARG = 30,
600 IIT_SAME_VEC_WIDTH_ARG = 31,
603 IIT_VEC_OF_ANYPTRS_TO_ELT = 34,
609 static void DecodeIITType(unsigned &NextElt, ArrayRef<unsigned char> Infos,
610 SmallVectorImpl<Intrinsic::IITDescriptor> &OutputTable) {
611 using namespace Intrinsic;
613 IIT_Info Info = IIT_Info(Infos[NextElt++]);
614 unsigned StructElts = 2;
618 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Void, 0));
621 OutputTable.push_back(IITDescriptor::get(IITDescriptor::VarArg, 0));
624 OutputTable.push_back(IITDescriptor::get(IITDescriptor::MMX, 0));
627 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Token, 0));
630 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Metadata, 0));
633 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Half, 0));
636 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Float, 0));
639 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Double, 0));
642 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 1));
645 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 8));
648 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer,16));
651 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 32));
654 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 64));
657 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 128));
660 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 1));
661 DecodeIITType(NextElt, Infos, OutputTable);
664 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 2));
665 DecodeIITType(NextElt, Infos, OutputTable);
668 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 4));
669 DecodeIITType(NextElt, Infos, OutputTable);
672 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 8));
673 DecodeIITType(NextElt, Infos, OutputTable);
676 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 16));
677 DecodeIITType(NextElt, Infos, OutputTable);
680 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 32));
681 DecodeIITType(NextElt, Infos, OutputTable);
684 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 64));
685 DecodeIITType(NextElt, Infos, OutputTable);
688 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 512));
689 DecodeIITType(NextElt, Infos, OutputTable);
692 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 1024));
693 DecodeIITType(NextElt, Infos, OutputTable);
696 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Pointer, 0));
697 DecodeIITType(NextElt, Infos, OutputTable);
699 case IIT_ANYPTR: { // [ANYPTR addrspace, subtype]
700 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Pointer,
702 DecodeIITType(NextElt, Infos, OutputTable);
706 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
707 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Argument, ArgInfo));
710 case IIT_EXTEND_ARG: {
711 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
712 OutputTable.push_back(IITDescriptor::get(IITDescriptor::ExtendArgument,
716 case IIT_TRUNC_ARG: {
717 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
718 OutputTable.push_back(IITDescriptor::get(IITDescriptor::TruncArgument,
722 case IIT_HALF_VEC_ARG: {
723 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
724 OutputTable.push_back(IITDescriptor::get(IITDescriptor::HalfVecArgument,
728 case IIT_SAME_VEC_WIDTH_ARG: {
729 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
730 OutputTable.push_back(IITDescriptor::get(IITDescriptor::SameVecWidthArgument,
734 case IIT_PTR_TO_ARG: {
735 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
736 OutputTable.push_back(IITDescriptor::get(IITDescriptor::PtrToArgument,
740 case IIT_PTR_TO_ELT: {
741 unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
742 OutputTable.push_back(IITDescriptor::get(IITDescriptor::PtrToElt, ArgInfo));
745 case IIT_VEC_OF_ANYPTRS_TO_ELT: {
746 unsigned short ArgNo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
747 unsigned short RefNo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
748 OutputTable.push_back(
749 IITDescriptor::get(IITDescriptor::VecOfAnyPtrsToElt, ArgNo, RefNo));
752 case IIT_EMPTYSTRUCT:
753 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Struct, 0));
755 case IIT_STRUCT5: ++StructElts; LLVM_FALLTHROUGH;
756 case IIT_STRUCT4: ++StructElts; LLVM_FALLTHROUGH;
757 case IIT_STRUCT3: ++StructElts; LLVM_FALLTHROUGH;
759 OutputTable.push_back(IITDescriptor::get(IITDescriptor::Struct,StructElts));
761 for (unsigned i = 0; i != StructElts; ++i)
762 DecodeIITType(NextElt, Infos, OutputTable);
766 llvm_unreachable("unhandled");
769 #define GET_INTRINSIC_GENERATOR_GLOBAL
770 #include "llvm/IR/Intrinsics.gen"
771 #undef GET_INTRINSIC_GENERATOR_GLOBAL
773 void Intrinsic::getIntrinsicInfoTableEntries(ID id,
774 SmallVectorImpl<IITDescriptor> &T){
775 // Check to see if the intrinsic's type was expressible by the table.
776 unsigned TableVal = IIT_Table[id-1];
778 // Decode the TableVal into an array of IITValues.
779 SmallVector<unsigned char, 8> IITValues;
780 ArrayRef<unsigned char> IITEntries;
781 unsigned NextElt = 0;
782 if ((TableVal >> 31) != 0) {
783 // This is an offset into the IIT_LongEncodingTable.
784 IITEntries = IIT_LongEncodingTable;
786 // Strip sentinel bit.
787 NextElt = (TableVal << 1) >> 1;
789 // Decode the TableVal into an array of IITValues. If the entry was encoded
790 // into a single word in the table itself, decode it now.
792 IITValues.push_back(TableVal & 0xF);
796 IITEntries = IITValues;
800 // Okay, decode the table into the output vector of IITDescriptors.
801 DecodeIITType(NextElt, IITEntries, T);
802 while (NextElt != IITEntries.size() && IITEntries[NextElt] != 0)
803 DecodeIITType(NextElt, IITEntries, T);
806 static Type *DecodeFixedType(ArrayRef<Intrinsic::IITDescriptor> &Infos,
807 ArrayRef<Type*> Tys, LLVMContext &Context) {
808 using namespace Intrinsic;
810 IITDescriptor D = Infos.front();
811 Infos = Infos.slice(1);
814 case IITDescriptor::Void: return Type::getVoidTy(Context);
815 case IITDescriptor::VarArg: return Type::getVoidTy(Context);
816 case IITDescriptor::MMX: return Type::getX86_MMXTy(Context);
817 case IITDescriptor::Token: return Type::getTokenTy(Context);
818 case IITDescriptor::Metadata: return Type::getMetadataTy(Context);
819 case IITDescriptor::Half: return Type::getHalfTy(Context);
820 case IITDescriptor::Float: return Type::getFloatTy(Context);
821 case IITDescriptor::Double: return Type::getDoubleTy(Context);
823 case IITDescriptor::Integer:
824 return IntegerType::get(Context, D.Integer_Width);
825 case IITDescriptor::Vector:
826 return VectorType::get(DecodeFixedType(Infos, Tys, Context),D.Vector_Width);
827 case IITDescriptor::Pointer:
828 return PointerType::get(DecodeFixedType(Infos, Tys, Context),
829 D.Pointer_AddressSpace);
830 case IITDescriptor::Struct: {
832 assert(D.Struct_NumElements <= 5 && "Can't handle this yet");
833 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
834 Elts[i] = DecodeFixedType(Infos, Tys, Context);
835 return StructType::get(Context, makeArrayRef(Elts,D.Struct_NumElements));
837 case IITDescriptor::Argument:
838 return Tys[D.getArgumentNumber()];
839 case IITDescriptor::ExtendArgument: {
840 Type *Ty = Tys[D.getArgumentNumber()];
841 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
842 return VectorType::getExtendedElementVectorType(VTy);
844 return IntegerType::get(Context, 2 * cast<IntegerType>(Ty)->getBitWidth());
846 case IITDescriptor::TruncArgument: {
847 Type *Ty = Tys[D.getArgumentNumber()];
848 if (VectorType *VTy = dyn_cast<VectorType>(Ty))
849 return VectorType::getTruncatedElementVectorType(VTy);
851 IntegerType *ITy = cast<IntegerType>(Ty);
852 assert(ITy->getBitWidth() % 2 == 0);
853 return IntegerType::get(Context, ITy->getBitWidth() / 2);
855 case IITDescriptor::HalfVecArgument:
856 return VectorType::getHalfElementsVectorType(cast<VectorType>(
857 Tys[D.getArgumentNumber()]));
858 case IITDescriptor::SameVecWidthArgument: {
859 Type *EltTy = DecodeFixedType(Infos, Tys, Context);
860 Type *Ty = Tys[D.getArgumentNumber()];
861 if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
862 return VectorType::get(EltTy, VTy->getNumElements());
864 llvm_unreachable("unhandled");
866 case IITDescriptor::PtrToArgument: {
867 Type *Ty = Tys[D.getArgumentNumber()];
868 return PointerType::getUnqual(Ty);
870 case IITDescriptor::PtrToElt: {
871 Type *Ty = Tys[D.getArgumentNumber()];
872 VectorType *VTy = dyn_cast<VectorType>(Ty);
874 llvm_unreachable("Expected an argument of Vector Type");
875 Type *EltTy = VTy->getVectorElementType();
876 return PointerType::getUnqual(EltTy);
878 case IITDescriptor::VecOfAnyPtrsToElt:
879 // Return the overloaded type (which determines the pointers address space)
880 return Tys[D.getOverloadArgNumber()];
882 llvm_unreachable("unhandled");
885 FunctionType *Intrinsic::getType(LLVMContext &Context,
886 ID id, ArrayRef<Type*> Tys) {
887 SmallVector<IITDescriptor, 8> Table;
888 getIntrinsicInfoTableEntries(id, Table);
890 ArrayRef<IITDescriptor> TableRef = Table;
891 Type *ResultTy = DecodeFixedType(TableRef, Tys, Context);
893 SmallVector<Type*, 8> ArgTys;
894 while (!TableRef.empty())
895 ArgTys.push_back(DecodeFixedType(TableRef, Tys, Context));
897 // DecodeFixedType returns Void for IITDescriptor::Void and IITDescriptor::VarArg
898 // If we see void type as the type of the last argument, it is vararg intrinsic
899 if (!ArgTys.empty() && ArgTys.back()->isVoidTy()) {
901 return FunctionType::get(ResultTy, ArgTys, true);
903 return FunctionType::get(ResultTy, ArgTys, false);
906 bool Intrinsic::isOverloaded(ID id) {
907 #define GET_INTRINSIC_OVERLOAD_TABLE
908 #include "llvm/IR/Intrinsics.gen"
909 #undef GET_INTRINSIC_OVERLOAD_TABLE
912 bool Intrinsic::isLeaf(ID id) {
917 case Intrinsic::experimental_gc_statepoint:
918 case Intrinsic::experimental_patchpoint_void:
919 case Intrinsic::experimental_patchpoint_i64:
924 /// This defines the "Intrinsic::getAttributes(ID id)" method.
925 #define GET_INTRINSIC_ATTRIBUTES
926 #include "llvm/IR/Intrinsics.gen"
927 #undef GET_INTRINSIC_ATTRIBUTES
929 Function *Intrinsic::getDeclaration(Module *M, ID id, ArrayRef<Type*> Tys) {
930 // There can never be multiple globals with the same name of different types,
931 // because intrinsics must be a specific type.
933 cast<Function>(M->getOrInsertFunction(getName(id, Tys),
934 getType(M->getContext(), id, Tys)));
937 // This defines the "Intrinsic::getIntrinsicForGCCBuiltin()" method.
938 #define GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
939 #include "llvm/IR/Intrinsics.gen"
940 #undef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
942 // This defines the "Intrinsic::getIntrinsicForMSBuiltin()" method.
943 #define GET_LLVM_INTRINSIC_FOR_MS_BUILTIN
944 #include "llvm/IR/Intrinsics.gen"
945 #undef GET_LLVM_INTRINSIC_FOR_MS_BUILTIN
947 bool Intrinsic::matchIntrinsicType(Type *Ty, ArrayRef<Intrinsic::IITDescriptor> &Infos,
948 SmallVectorImpl<Type*> &ArgTys) {
949 using namespace Intrinsic;
951 // If we ran out of descriptors, there are too many arguments.
952 if (Infos.empty()) return true;
953 IITDescriptor D = Infos.front();
954 Infos = Infos.slice(1);
957 case IITDescriptor::Void: return !Ty->isVoidTy();
958 case IITDescriptor::VarArg: return true;
959 case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
960 case IITDescriptor::Token: return !Ty->isTokenTy();
961 case IITDescriptor::Metadata: return !Ty->isMetadataTy();
962 case IITDescriptor::Half: return !Ty->isHalfTy();
963 case IITDescriptor::Float: return !Ty->isFloatTy();
964 case IITDescriptor::Double: return !Ty->isDoubleTy();
965 case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
966 case IITDescriptor::Vector: {
967 VectorType *VT = dyn_cast<VectorType>(Ty);
968 return !VT || VT->getNumElements() != D.Vector_Width ||
969 matchIntrinsicType(VT->getElementType(), Infos, ArgTys);
971 case IITDescriptor::Pointer: {
972 PointerType *PT = dyn_cast<PointerType>(Ty);
973 return !PT || PT->getAddressSpace() != D.Pointer_AddressSpace ||
974 matchIntrinsicType(PT->getElementType(), Infos, ArgTys);
977 case IITDescriptor::Struct: {
978 StructType *ST = dyn_cast<StructType>(Ty);
979 if (!ST || ST->getNumElements() != D.Struct_NumElements)
982 for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
983 if (matchIntrinsicType(ST->getElementType(i), Infos, ArgTys))
988 case IITDescriptor::Argument:
989 // Two cases here - If this is the second occurrence of an argument, verify
990 // that the later instance matches the previous instance.
991 if (D.getArgumentNumber() < ArgTys.size())
992 return Ty != ArgTys[D.getArgumentNumber()];
994 // Otherwise, if this is the first instance of an argument, record it and
995 // verify the "Any" kind.
996 assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
997 ArgTys.push_back(Ty);
999 switch (D.getArgumentKind()) {
1000 case IITDescriptor::AK_Any: return false; // Success
1001 case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
1002 case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
1003 case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
1004 case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
1006 llvm_unreachable("all argument kinds not covered");
1008 case IITDescriptor::ExtendArgument: {
1009 // This may only be used when referring to a previous vector argument.
1010 if (D.getArgumentNumber() >= ArgTys.size())
1013 Type *NewTy = ArgTys[D.getArgumentNumber()];
1014 if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
1015 NewTy = VectorType::getExtendedElementVectorType(VTy);
1016 else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
1017 NewTy = IntegerType::get(ITy->getContext(), 2 * ITy->getBitWidth());
1023 case IITDescriptor::TruncArgument: {
1024 // This may only be used when referring to a previous vector argument.
1025 if (D.getArgumentNumber() >= ArgTys.size())
1028 Type *NewTy = ArgTys[D.getArgumentNumber()];
1029 if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
1030 NewTy = VectorType::getTruncatedElementVectorType(VTy);
1031 else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
1032 NewTy = IntegerType::get(ITy->getContext(), ITy->getBitWidth() / 2);
1038 case IITDescriptor::HalfVecArgument:
1039 // This may only be used when referring to a previous vector argument.
1040 return D.getArgumentNumber() >= ArgTys.size() ||
1041 !isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
1042 VectorType::getHalfElementsVectorType(
1043 cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
1044 case IITDescriptor::SameVecWidthArgument: {
1045 if (D.getArgumentNumber() >= ArgTys.size())
1047 VectorType * ReferenceType =
1048 dyn_cast<VectorType>(ArgTys[D.getArgumentNumber()]);
1049 VectorType *ThisArgType = dyn_cast<VectorType>(Ty);
1050 if (!ThisArgType || !ReferenceType ||
1051 (ReferenceType->getVectorNumElements() !=
1052 ThisArgType->getVectorNumElements()))
1054 return matchIntrinsicType(ThisArgType->getVectorElementType(),
1057 case IITDescriptor::PtrToArgument: {
1058 if (D.getArgumentNumber() >= ArgTys.size())
1060 Type * ReferenceType = ArgTys[D.getArgumentNumber()];
1061 PointerType *ThisArgType = dyn_cast<PointerType>(Ty);
1062 return (!ThisArgType || ThisArgType->getElementType() != ReferenceType);
1064 case IITDescriptor::PtrToElt: {
1065 if (D.getArgumentNumber() >= ArgTys.size())
1067 VectorType * ReferenceType =
1068 dyn_cast<VectorType> (ArgTys[D.getArgumentNumber()]);
1069 PointerType *ThisArgType = dyn_cast<PointerType>(Ty);
1071 return (!ThisArgType || !ReferenceType ||
1072 ThisArgType->getElementType() != ReferenceType->getElementType());
1074 case IITDescriptor::VecOfAnyPtrsToElt: {
1075 unsigned RefArgNumber = D.getRefArgNumber();
1077 // This may only be used when referring to a previous argument.
1078 if (RefArgNumber >= ArgTys.size())
1081 // Record the overloaded type
1082 assert(D.getOverloadArgNumber() == ArgTys.size() &&
1083 "Table consistency error");
1084 ArgTys.push_back(Ty);
1086 // Verify the overloaded type "matches" the Ref type.
1087 // i.e. Ty is a vector with the same width as Ref.
1088 // Composed of pointers to the same element type as Ref.
1089 VectorType *ReferenceType = dyn_cast<VectorType>(ArgTys[RefArgNumber]);
1090 VectorType *ThisArgVecTy = dyn_cast<VectorType>(Ty);
1091 if (!ThisArgVecTy || !ReferenceType ||
1092 (ReferenceType->getVectorNumElements() !=
1093 ThisArgVecTy->getVectorNumElements()))
1095 PointerType *ThisArgEltTy =
1096 dyn_cast<PointerType>(ThisArgVecTy->getVectorElementType());
1099 return ThisArgEltTy->getElementType() !=
1100 ReferenceType->getVectorElementType();
1103 llvm_unreachable("unhandled");
1107 Intrinsic::matchIntrinsicVarArg(bool isVarArg,
1108 ArrayRef<Intrinsic::IITDescriptor> &Infos) {
1109 // If there are no descriptors left, then it can't be a vararg.
1113 // There should be only one descriptor remaining at this point.
1114 if (Infos.size() != 1)
1117 // Check and verify the descriptor.
1118 IITDescriptor D = Infos.front();
1119 Infos = Infos.slice(1);
1120 if (D.Kind == IITDescriptor::VarArg)
1126 Optional<Function*> Intrinsic::remangleIntrinsicFunction(Function *F) {
1127 Intrinsic::ID ID = F->getIntrinsicID();
1131 FunctionType *FTy = F->getFunctionType();
1132 // Accumulate an array of overloaded types for the given intrinsic
1133 SmallVector<Type *, 4> ArgTys;
1135 SmallVector<Intrinsic::IITDescriptor, 8> Table;
1136 getIntrinsicInfoTableEntries(ID, Table);
1137 ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
1139 // If we encounter any problems matching the signature with the descriptor
1140 // just give up remangling. It's up to verifier to report the discrepancy.
1141 if (Intrinsic::matchIntrinsicType(FTy->getReturnType(), TableRef, ArgTys))
1143 for (auto Ty : FTy->params())
1144 if (Intrinsic::matchIntrinsicType(Ty, TableRef, ArgTys))
1146 if (Intrinsic::matchIntrinsicVarArg(FTy->isVarArg(), TableRef))
1150 StringRef Name = F->getName();
1151 if (Name == Intrinsic::getName(ID, ArgTys))
1154 auto NewDecl = Intrinsic::getDeclaration(F->getParent(), ID, ArgTys);
1155 NewDecl->setCallingConv(F->getCallingConv());
1156 assert(NewDecl->getFunctionType() == FTy && "Shouldn't change the signature");
1160 /// hasAddressTaken - returns true if there are any uses of this function
1161 /// other than direct calls or invokes to it.
1162 bool Function::hasAddressTaken(const User* *PutOffender) const {
1163 for (const Use &U : uses()) {
1164 const User *FU = U.getUser();
1165 if (isa<BlockAddress>(FU))
1167 if (!isa<CallInst>(FU) && !isa<InvokeInst>(FU)) {
1172 ImmutableCallSite CS(cast<Instruction>(FU));
1173 if (!CS.isCallee(&U)) {
1182 bool Function::isDefTriviallyDead() const {
1183 // Check the linkage
1184 if (!hasLinkOnceLinkage() && !hasLocalLinkage() &&
1185 !hasAvailableExternallyLinkage())
1188 // Check if the function is used by anything other than a blockaddress.
1189 for (const User *U : users())
1190 if (!isa<BlockAddress>(U))
1196 /// callsFunctionThatReturnsTwice - Return true if the function has a call to
1197 /// setjmp or other function that gcc recognizes as "returning twice".
1198 bool Function::callsFunctionThatReturnsTwice() const {
1199 for (const_inst_iterator
1200 I = inst_begin(this), E = inst_end(this); I != E; ++I) {
1201 ImmutableCallSite CS(&*I);
1202 if (CS && CS.hasFnAttr(Attribute::ReturnsTwice))
1209 Constant *Function::getPersonalityFn() const {
1210 assert(hasPersonalityFn() && getNumOperands());
1211 return cast<Constant>(Op<0>());
1214 void Function::setPersonalityFn(Constant *Fn) {
1215 setHungoffOperand<0>(Fn);
1216 setValueSubclassDataBit(3, Fn != nullptr);
1219 Constant *Function::getPrefixData() const {
1220 assert(hasPrefixData() && getNumOperands());
1221 return cast<Constant>(Op<1>());
1224 void Function::setPrefixData(Constant *PrefixData) {
1225 setHungoffOperand<1>(PrefixData);
1226 setValueSubclassDataBit(1, PrefixData != nullptr);
1229 Constant *Function::getPrologueData() const {
1230 assert(hasPrologueData() && getNumOperands());
1231 return cast<Constant>(Op<2>());
1234 void Function::setPrologueData(Constant *PrologueData) {
1235 setHungoffOperand<2>(PrologueData);
1236 setValueSubclassDataBit(2, PrologueData != nullptr);
1239 void Function::allocHungoffUselist() {
1240 // If we've already allocated a uselist, stop here.
1241 if (getNumOperands())
1244 allocHungoffUses(3, /*IsPhi=*/ false);
1245 setNumHungOffUseOperands(3);
1247 // Initialize the uselist with placeholder operands to allow traversal.
1248 auto *CPN = ConstantPointerNull::get(Type::getInt1PtrTy(getContext(), 0));
1255 void Function::setHungoffOperand(Constant *C) {
1257 allocHungoffUselist();
1259 } else if (getNumOperands()) {
1261 ConstantPointerNull::get(Type::getInt1PtrTy(getContext(), 0)));
1265 void Function::setValueSubclassDataBit(unsigned Bit, bool On) {
1266 assert(Bit < 16 && "SubclassData contains only 16 bits");
1268 setValueSubclassData(getSubclassDataFromValue() | (1 << Bit));
1270 setValueSubclassData(getSubclassDataFromValue() & ~(1 << Bit));
1273 void Function::setEntryCount(uint64_t Count,
1274 const DenseSet<GlobalValue::GUID> *S) {
1275 MDBuilder MDB(getContext());
1276 setMetadata(LLVMContext::MD_prof, MDB.createFunctionEntryCount(Count, S));
1279 Optional<uint64_t> Function::getEntryCount() const {
1280 MDNode *MD = getMetadata(LLVMContext::MD_prof);
1281 if (MD && MD->getOperand(0))
1282 if (MDString *MDS = dyn_cast<MDString>(MD->getOperand(0)))
1283 if (MDS->getString().equals("function_entry_count")) {
1284 ConstantInt *CI = mdconst::extract<ConstantInt>(MD->getOperand(1));
1285 uint64_t Count = CI->getValue().getZExtValue();
1293 DenseSet<GlobalValue::GUID> Function::getImportGUIDs() const {
1294 DenseSet<GlobalValue::GUID> R;
1295 if (MDNode *MD = getMetadata(LLVMContext::MD_prof))
1296 if (MDString *MDS = dyn_cast<MDString>(MD->getOperand(0)))
1297 if (MDS->getString().equals("function_entry_count"))
1298 for (unsigned i = 2; i < MD->getNumOperands(); i++)
1299 R.insert(mdconst::extract<ConstantInt>(MD->getOperand(i))
1305 void Function::setSectionPrefix(StringRef Prefix) {
1306 MDBuilder MDB(getContext());
1307 setMetadata(LLVMContext::MD_section_prefix,
1308 MDB.createFunctionSectionPrefix(Prefix));
1311 Optional<StringRef> Function::getSectionPrefix() const {
1312 if (MDNode *MD = getMetadata(LLVMContext::MD_section_prefix)) {
1313 assert(dyn_cast<MDString>(MD->getOperand(0))
1315 .equals("function_section_prefix") &&
1316 "Metadata not match");
1317 return dyn_cast<MDString>(MD->getOperand(1))->getString();