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27d17d1713
llvm-mirror/lib/IR/Function.cpp
Reid Kleckner 27d17d1713 Rename AttributeSet to AttributeList 
Summary:
This class is a list of AttributeSetNodes corresponding the function
prototype of a call or function declaration. This class used to be
called ParamAttrListPtr, then AttrListPtr, then AttributeSet. It is
typically accessed by parameter and return value index, so
"AttributeList" seems like a more intuitive name.

Rename AttributeSetImpl to AttributeListImpl to follow suit.

It's useful to rename this class so that we can rename AttributeSetNode
to AttributeSet later. AttributeSet is the set of attributes that apply
to a single function, argument, or return value.

Reviewers: sanjoy, javed.absar, chandlerc, pete

Reviewed By: pete

Subscribers: pete, jholewinski, arsenm, dschuff, mehdi_amini, jfb, nhaehnle, sbc100, void, llvm-commits

Differential Revision: https://reviews.llvm.org/D31102

llvm-svn: 298393
2017-03-21 16:57:19 +00:00

1298 lines
44 KiB
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//===-- Function.cpp - Implement the Global object classes ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the Function class for the IR library.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Function.h"
#include "LLVMContextImpl.h"
#include "SymbolTableListTraitsImpl.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/CodeGen/ValueTypes.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
using namespace llvm;
// Explicit instantiations of SymbolTableListTraits since some of the methods
// are not in the public header file...
template class llvm::SymbolTableListTraits<BasicBlock>;
//===----------------------------------------------------------------------===//
// Argument Implementation
//===----------------------------------------------------------------------===//
void Argument::anchor() { }
Argument::Argument(Type *Ty, const Twine &Name, Function *Par, unsigned ArgNo)
: Value(Ty, Value::ArgumentVal), Parent(Par), ArgNo(ArgNo) {
setName(Name);
}
void Argument::setParent(Function *parent) {
Parent = parent;
}
bool Argument::hasNonNullAttr() const {
if (!getType()->isPointerTy()) return false;
if (getParent()->getAttributes().
hasAttribute(getArgNo()+1, Attribute::NonNull))
return true;
else if (getDereferenceableBytes() > 0 &&
getType()->getPointerAddressSpace() == 0)
return true;
return false;
}
bool Argument::hasByValAttr() const {
if (!getType()->isPointerTy()) return false;
return hasAttribute(Attribute::ByVal);
}
bool Argument::hasSwiftSelfAttr() const {
return getParent()->getAttributes().
hasAttribute(getArgNo()+1, Attribute::SwiftSelf);
}
bool Argument::hasSwiftErrorAttr() const {
return getParent()->getAttributes().
hasAttribute(getArgNo()+1, Attribute::SwiftError);
}
bool Argument::hasInAllocaAttr() const {
if (!getType()->isPointerTy()) return false;
return hasAttribute(Attribute::InAlloca);
}
bool Argument::hasByValOrInAllocaAttr() const {
if (!getType()->isPointerTy()) return false;
AttributeList Attrs = getParent()->getAttributes();
return Attrs.hasAttribute(getArgNo() + 1, Attribute::ByVal) ||
Attrs.hasAttribute(getArgNo() + 1, Attribute::InAlloca);
}
unsigned Argument::getParamAlignment() const {
assert(getType()->isPointerTy() && "Only pointers have alignments");
return getParent()->getParamAlignment(getArgNo()+1);
}
uint64_t Argument::getDereferenceableBytes() const {
assert(getType()->isPointerTy() &&
"Only pointers have dereferenceable bytes");
return getParent()->getDereferenceableBytes(getArgNo()+1);
}
uint64_t Argument::getDereferenceableOrNullBytes() const {
assert(getType()->isPointerTy() &&
"Only pointers have dereferenceable bytes");
return getParent()->getDereferenceableOrNullBytes(getArgNo()+1);
}
bool Argument::hasNestAttr() const {
if (!getType()->isPointerTy()) return false;
return hasAttribute(Attribute::Nest);
}
bool Argument::hasNoAliasAttr() const {
if (!getType()->isPointerTy()) return false;
return hasAttribute(Attribute::NoAlias);
}
bool Argument::hasNoCaptureAttr() const {
if (!getType()->isPointerTy()) return false;
return hasAttribute(Attribute::NoCapture);
}
bool Argument::hasStructRetAttr() const {
if (!getType()->isPointerTy()) return false;
return hasAttribute(Attribute::StructRet);
}
bool Argument::hasReturnedAttr() const {
return hasAttribute(Attribute::Returned);
}
bool Argument::hasZExtAttr() const {
return hasAttribute(Attribute::ZExt);
}
bool Argument::hasSExtAttr() const {
return hasAttribute(Attribute::SExt);
}
bool Argument::onlyReadsMemory() const {
return getParent()->getAttributes().
hasAttribute(getArgNo()+1, Attribute::ReadOnly) ||
getParent()->getAttributes().
hasAttribute(getArgNo()+1, Attribute::ReadNone);
}
void Argument::addAttr(AttributeList AS) {
assert(AS.getNumSlots() <= 1 &&
"Trying to add more than one attribute set to an argument!");
AttrBuilder B(AS, AS.getSlotIndex(0));
getParent()->addAttributes(
getArgNo() + 1,
AttributeList::get(Parent->getContext(), getArgNo() + 1, B));
}
void Argument::removeAttr(AttributeList AS) {
assert(AS.getNumSlots() <= 1 &&
"Trying to remove more than one attribute set from an argument!");
AttrBuilder B(AS, AS.getSlotIndex(0));
getParent()->removeAttributes(
getArgNo() + 1,
AttributeList::get(Parent->getContext(), getArgNo() + 1, B));
}
bool Argument::hasAttribute(Attribute::AttrKind Kind) const {
return getParent()->hasAttribute(getArgNo() + 1, Kind);
}
//===----------------------------------------------------------------------===//
// Helper Methods in Function
//===----------------------------------------------------------------------===//
LLVMContext &Function::getContext() const {
return getType()->getContext();
}
void Function::removeFromParent() {
getParent()->getFunctionList().remove(getIterator());
}
void Function::eraseFromParent() {
getParent()->getFunctionList().erase(getIterator());
}
//===----------------------------------------------------------------------===//
// Function Implementation
//===----------------------------------------------------------------------===//
Function::Function(FunctionType *Ty, LinkageTypes Linkage, const Twine &name,
Module *ParentModule)
: GlobalObject(Ty, Value::FunctionVal,
OperandTraits<Function>::op_begin(this), 0, Linkage, name),
Arguments(nullptr), NumArgs(Ty->getNumParams()) {
assert(FunctionType::isValidReturnType(getReturnType()) &&
"invalid return type");
setGlobalObjectSubClassData(0);
// We only need a symbol table for a function if the context keeps value names
if (!getContext().shouldDiscardValueNames())
SymTab = make_unique<ValueSymbolTable>();
// If the function has arguments, mark them as lazily built.
if (Ty->getNumParams())
setValueSubclassData(1); // Set the "has lazy arguments" bit.
if (ParentModule)
ParentModule->getFunctionList().push_back(this);
HasLLVMReservedName = getName().startswith("llvm.");
// Ensure intrinsics have the right parameter attributes.
// Note, the IntID field will have been set in Value::setName if this function
// name is a valid intrinsic ID.
if (IntID)
setAttributes(Intrinsic::getAttributes(getContext(), IntID));
}
Function::~Function() {
dropAllReferences(); // After this it is safe to delete instructions.
// Delete all of the method arguments and unlink from symbol table...
if (Arguments)
clearArguments();
// Remove the function from the on-the-side GC table.
clearGC();
}
void Function::BuildLazyArguments() const {
// Create the arguments vector, all arguments start out unnamed.
auto *FT = getFunctionType();
if (NumArgs > 0) {
Arguments = std::allocator<Argument>().allocate(NumArgs);
for (unsigned i = 0, e = NumArgs; i != e; ++i) {
Type *ArgTy = FT->getParamType(i);
assert(!ArgTy->isVoidTy() && "Cannot have void typed arguments!");
new (Arguments + i) Argument(ArgTy, "", const_cast<Function *>(this), i);
}
}
// Clear the lazy arguments bit.
unsigned SDC = getSubclassDataFromValue();
const_cast<Function*>(this)->setValueSubclassData(SDC &= ~(1<<0));
assert(!hasLazyArguments());
}
static MutableArrayRef<Argument> makeArgArray(Argument *Args, size_t Count) {
return MutableArrayRef<Argument>(Args, Count);
}
void Function::clearArguments() {
for (Argument &A : makeArgArray(Arguments, NumArgs)) {
A.setName("");
A.~Argument();
}
std::allocator<Argument>().deallocate(Arguments, NumArgs);
Arguments = nullptr;
}
void Function::stealArgumentListFrom(Function &Src) {
assert(isDeclaration() && "Expected no references to current arguments");
// Drop the current arguments, if any, and set the lazy argument bit.
if (!hasLazyArguments()) {
assert(llvm::all_of(makeArgArray(Arguments, NumArgs),
[](const Argument &A) { return A.use_empty(); }) &&
"Expected arguments to be unused in declaration");
clearArguments();
setValueSubclassData(getSubclassDataFromValue() | (1 << 0));
}
// Nothing to steal if Src has lazy arguments.
if (Src.hasLazyArguments())
return;
// Steal arguments from Src, and fix the lazy argument bits.
assert(arg_size() == Src.arg_size());
Arguments = Src.Arguments;
Src.Arguments = nullptr;
for (Argument &A : makeArgArray(Arguments, NumArgs)) {
// FIXME: This does the work of transferNodesFromList inefficiently.
SmallString<128> Name;
if (A.hasName())
Name = A.getName();
if (!Name.empty())
A.setName("");
A.setParent(this);
if (!Name.empty())
A.setName(Name);
}
setValueSubclassData(getSubclassDataFromValue() & ~(1 << 0));
assert(!hasLazyArguments());
Src.setValueSubclassData(Src.getSubclassDataFromValue() | (1 << 0));
}
// dropAllReferences() - This function causes all the subinstructions to "let
// go" of all references that they are maintaining. This allows one to
// 'delete' a whole class at a time, even though there may be circular
// references... first all references are dropped, and all use counts go to
// zero. Then everything is deleted for real. Note that no operations are
// valid on an object that has "dropped all references", except operator
// delete.
//
void Function::dropAllReferences() {
setIsMaterializable(false);
for (BasicBlock &BB : *this)
BB.dropAllReferences();
// Delete all basic blocks. They are now unused, except possibly by
// blockaddresses, but BasicBlock's destructor takes care of those.
while (!BasicBlocks.empty())
BasicBlocks.begin()->eraseFromParent();
// Drop uses of any optional data (real or placeholder).
if (getNumOperands()) {
User::dropAllReferences();
setNumHungOffUseOperands(0);
setValueSubclassData(getSubclassDataFromValue() & ~0xe);
}
// Metadata is stored in a side-table.
clearMetadata();
}
void Function::addAttribute(unsigned i, Attribute::AttrKind Kind) {
AttributeList PAL = getAttributes();
PAL = PAL.addAttribute(getContext(), i, Kind);
setAttributes(PAL);
}
void Function::addAttribute(unsigned i, Attribute Attr) {
AttributeList PAL = getAttributes();
PAL = PAL.addAttribute(getContext(), i, Attr);
setAttributes(PAL);
}
void Function::addAttributes(unsigned i, AttributeList Attrs) {
AttributeList PAL = getAttributes();
PAL = PAL.addAttributes(getContext(), i, Attrs);
setAttributes(PAL);
}
void Function::removeAttribute(unsigned i, Attribute::AttrKind Kind) {
AttributeList PAL = getAttributes();
PAL = PAL.removeAttribute(getContext(), i, Kind);
setAttributes(PAL);
}
void Function::removeAttribute(unsigned i, StringRef Kind) {
AttributeList PAL = getAttributes();
PAL = PAL.removeAttribute(getContext(), i, Kind);
setAttributes(PAL);
}
void Function::removeAttributes(unsigned i, AttributeList Attrs) {
AttributeList PAL = getAttributes();
PAL = PAL.removeAttributes(getContext(), i, Attrs);
setAttributes(PAL);
}
void Function::addDereferenceableAttr(unsigned i, uint64_t Bytes) {
AttributeList PAL = getAttributes();
PAL = PAL.addDereferenceableAttr(getContext(), i, Bytes);
setAttributes(PAL);
}
void Function::addDereferenceableOrNullAttr(unsigned i, uint64_t Bytes) {
AttributeList PAL = getAttributes();
PAL = PAL.addDereferenceableOrNullAttr(getContext(), i, Bytes);
setAttributes(PAL);
}
const std::string &Function::getGC() const {
assert(hasGC() && "Function has no collector");
return getContext().getGC(*this);
}
void Function::setGC(std::string Str) {
setValueSubclassDataBit(14, !Str.empty());
getContext().setGC(*this, std::move(Str));
}
void Function::clearGC() {
if (!hasGC())
return;
getContext().deleteGC(*this);
setValueSubclassDataBit(14, false);
}
/// Copy all additional attributes (those not needed to create a Function) from
/// the Function Src to this one.
void Function::copyAttributesFrom(const GlobalValue *Src) {
GlobalObject::copyAttributesFrom(Src);
const Function *SrcF = dyn_cast<Function>(Src);
if (!SrcF)
return;
setCallingConv(SrcF->getCallingConv());
setAttributes(SrcF->getAttributes());
if (SrcF->hasGC())
setGC(SrcF->getGC());
else
clearGC();
if (SrcF->hasPersonalityFn())
setPersonalityFn(SrcF->getPersonalityFn());
if (SrcF->hasPrefixData())
setPrefixData(SrcF->getPrefixData());
if (SrcF->hasPrologueData())
setPrologueData(SrcF->getPrologueData());
}
/// Table of string intrinsic names indexed by enum value.
static const char * const IntrinsicNameTable[] = {
"not_intrinsic",
#define GET_INTRINSIC_NAME_TABLE
#include "llvm/IR/Intrinsics.gen"
#undef GET_INTRINSIC_NAME_TABLE
};
/// Table of per-target intrinsic name tables.
#define GET_INTRINSIC_TARGET_DATA
#include "llvm/IR/Intrinsics.gen"
#undef GET_INTRINSIC_TARGET_DATA
/// Find the segment of \c IntrinsicNameTable for intrinsics with the same
/// target as \c Name, or the generic table if \c Name is not target specific.
///
/// Returns the relevant slice of \c IntrinsicNameTable
static ArrayRef<const char *> findTargetSubtable(StringRef Name) {
assert(Name.startswith("llvm."));
ArrayRef<IntrinsicTargetInfo> Targets(TargetInfos);
// Drop "llvm." and take the first dotted component. That will be the target
// if this is target specific.
StringRef Target = Name.drop_front(5).split('.').first;
auto It = std::lower_bound(Targets.begin(), Targets.end(), Target,
[](const IntrinsicTargetInfo &TI,
StringRef Target) { return TI.Name < Target; });
// We've either found the target or just fall back to the generic set, which
// is always first.
const auto &TI = It != Targets.end() && It->Name == Target ? *It : Targets[0];
return makeArrayRef(&IntrinsicNameTable[1] + TI.Offset, TI.Count);
}
/// \brief This does the actual lookup of an intrinsic ID which
/// matches the given function name.
Intrinsic::ID Function::lookupIntrinsicID(StringRef Name) {
ArrayRef<const char *> NameTable = findTargetSubtable(Name);
int Idx = Intrinsic::lookupLLVMIntrinsicByName(NameTable, Name);
if (Idx == -1)
return Intrinsic::not_intrinsic;
// Intrinsic IDs correspond to the location in IntrinsicNameTable, but we have
// an index into a sub-table.
int Adjust = NameTable.data() - IntrinsicNameTable;
Intrinsic::ID ID = static_cast<Intrinsic::ID>(Idx + Adjust);
// If the intrinsic is not overloaded, require an exact match. If it is
// overloaded, require a prefix match.
bool IsPrefixMatch = Name.size() > strlen(NameTable[Idx]);
return IsPrefixMatch == isOverloaded(ID) ? ID : Intrinsic::not_intrinsic;
}
void Function::recalculateIntrinsicID() {
StringRef Name = getName();
if (!Name.startswith("llvm.")) {
HasLLVMReservedName = false;
IntID = Intrinsic::not_intrinsic;
return;
}
HasLLVMReservedName = true;
IntID = lookupIntrinsicID(Name);
}
/// Returns a stable mangling for the type specified for use in the name
/// mangling scheme used by 'any' types in intrinsic signatures. The mangling
/// of named types is simply their name. Manglings for unnamed types consist
/// of a prefix ('p' for pointers, 'a' for arrays, 'f_' for functions)
/// combined with the mangling of their component types. A vararg function
/// type will have a suffix of 'vararg'. Since function types can contain
/// other function types, we close a function type mangling with suffix 'f'
/// which can't be confused with it's prefix. This ensures we don't have
/// collisions between two unrelated function types. Otherwise, you might
/// parse ffXX as f(fXX) or f(fX)X. (X is a placeholder for any other type.)
/// Manglings of integers, floats, and vectors ('i', 'f', and 'v' prefix in most
/// cases) fall back to the MVT codepath, where they could be mangled to
/// 'x86mmx', for example; matching on derived types is not sufficient to mangle
/// everything.
static std::string getMangledTypeStr(Type* Ty) {
std::string Result;
if (PointerType* PTyp = dyn_cast<PointerType>(Ty)) {
Result += "p" + llvm::utostr(PTyp->getAddressSpace()) +
getMangledTypeStr(PTyp->getElementType());
} else if (ArrayType* ATyp = dyn_cast<ArrayType>(Ty)) {
Result += "a" + llvm::utostr(ATyp->getNumElements()) +
getMangledTypeStr(ATyp->getElementType());
} else if (StructType *STyp = dyn_cast<StructType>(Ty)) {
if (!STyp->isLiteral()) {
Result += "s_";
Result += STyp->getName();
} else {
Result += "sl_";
for (auto Elem : STyp->elements())
Result += getMangledTypeStr(Elem);
}
// Ensure nested structs are distinguishable.
Result += "s";
} else if (FunctionType *FT = dyn_cast<FunctionType>(Ty)) {
Result += "f_" + getMangledTypeStr(FT->getReturnType());
for (size_t i = 0; i < FT->getNumParams(); i++)
Result += getMangledTypeStr(FT->getParamType(i));
if (FT->isVarArg())
Result += "vararg";
// Ensure nested function types are distinguishable.
Result += "f";
} else if (isa<VectorType>(Ty))
Result += "v" + utostr(Ty->getVectorNumElements()) +
getMangledTypeStr(Ty->getVectorElementType());
else if (Ty)
Result += EVT::getEVT(Ty).getEVTString();
return Result;
}
StringRef Intrinsic::getName(ID id) {
assert(id < num_intrinsics && "Invalid intrinsic ID!");
assert(!isOverloaded(id) &&
"This version of getName does not support overloading");
return IntrinsicNameTable[id];
}
std::string Intrinsic::getName(ID id, ArrayRef<Type*> Tys) {
assert(id < num_intrinsics && "Invalid intrinsic ID!");
std::string Result(IntrinsicNameTable[id]);
for (Type *Ty : Tys) {
Result += "." + getMangledTypeStr(Ty);
}
return Result;
}
/// IIT_Info - These are enumerators that describe the entries returned by the
/// getIntrinsicInfoTableEntries function.
///
/// NOTE: This must be kept in synch with the copy in TblGen/IntrinsicEmitter!
enum IIT_Info {
// Common values should be encoded with 0-15.
IIT_Done = 0,
IIT_I1 = 1,
IIT_I8 = 2,
IIT_I16 = 3,
IIT_I32 = 4,
IIT_I64 = 5,
IIT_F16 = 6,
IIT_F32 = 7,
IIT_F64 = 8,
IIT_V2 = 9,
IIT_V4 = 10,
IIT_V8 = 11,
IIT_V16 = 12,
IIT_V32 = 13,
IIT_PTR = 14,
IIT_ARG = 15,
// Values from 16+ are only encodable with the inefficient encoding.
IIT_V64 = 16,
IIT_MMX = 17,
IIT_TOKEN = 18,
IIT_METADATA = 19,
IIT_EMPTYSTRUCT = 20,
IIT_STRUCT2 = 21,
IIT_STRUCT3 = 22,
IIT_STRUCT4 = 23,
IIT_STRUCT5 = 24,
IIT_EXTEND_ARG = 25,
IIT_TRUNC_ARG = 26,
IIT_ANYPTR = 27,
IIT_V1 = 28,
IIT_VARARG = 29,
IIT_HALF_VEC_ARG = 30,
IIT_SAME_VEC_WIDTH_ARG = 31,
IIT_PTR_TO_ARG = 32,
IIT_PTR_TO_ELT = 33,
IIT_VEC_OF_PTRS_TO_ELT = 34,
IIT_I128 = 35,
IIT_V512 = 36,
IIT_V1024 = 37
};
static void DecodeIITType(unsigned &NextElt, ArrayRef<unsigned char> Infos,
SmallVectorImpl<Intrinsic::IITDescriptor> &OutputTable) {
IIT_Info Info = IIT_Info(Infos[NextElt++]);
unsigned StructElts = 2;
using namespace Intrinsic;
switch (Info) {
case IIT_Done:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Void, 0));
return;
case IIT_VARARG:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::VarArg, 0));
return;
case IIT_MMX:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::MMX, 0));
return;
case IIT_TOKEN:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Token, 0));
return;
case IIT_METADATA:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Metadata, 0));
return;
case IIT_F16:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Half, 0));
return;
case IIT_F32:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Float, 0));
return;
case IIT_F64:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Double, 0));
return;
case IIT_I1:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 1));
return;
case IIT_I8:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 8));
return;
case IIT_I16:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer,16));
return;
case IIT_I32:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 32));
return;
case IIT_I64:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 64));
return;
case IIT_I128:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Integer, 128));
return;
case IIT_V1:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 1));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_V2:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 2));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_V4:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 4));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_V8:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 8));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_V16:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 16));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_V32:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 32));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_V64:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 64));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_V512:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 512));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_V1024:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Vector, 1024));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_PTR:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Pointer, 0));
DecodeIITType(NextElt, Infos, OutputTable);
return;
case IIT_ANYPTR: { // [ANYPTR addrspace, subtype]
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Pointer,
Infos[NextElt++]));
DecodeIITType(NextElt, Infos, OutputTable);
return;
}
case IIT_ARG: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Argument, ArgInfo));
return;
}
case IIT_EXTEND_ARG: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::ExtendArgument,
ArgInfo));
return;
}
case IIT_TRUNC_ARG: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::TruncArgument,
ArgInfo));
return;
}
case IIT_HALF_VEC_ARG: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::HalfVecArgument,
ArgInfo));
return;
}
case IIT_SAME_VEC_WIDTH_ARG: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::SameVecWidthArgument,
ArgInfo));
return;
}
case IIT_PTR_TO_ARG: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::PtrToArgument,
ArgInfo));
return;
}
case IIT_PTR_TO_ELT: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::PtrToElt, ArgInfo));
return;
}
case IIT_VEC_OF_PTRS_TO_ELT: {
unsigned ArgInfo = (NextElt == Infos.size() ? 0 : Infos[NextElt++]);
OutputTable.push_back(IITDescriptor::get(IITDescriptor::VecOfPtrsToElt,
ArgInfo));
return;
}
case IIT_EMPTYSTRUCT:
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Struct, 0));
return;
case IIT_STRUCT5: ++StructElts; LLVM_FALLTHROUGH;
case IIT_STRUCT4: ++StructElts; LLVM_FALLTHROUGH;
case IIT_STRUCT3: ++StructElts; LLVM_FALLTHROUGH;
case IIT_STRUCT2: {
OutputTable.push_back(IITDescriptor::get(IITDescriptor::Struct,StructElts));
for (unsigned i = 0; i != StructElts; ++i)
DecodeIITType(NextElt, Infos, OutputTable);
return;
}
}
llvm_unreachable("unhandled");
}
#define GET_INTRINSIC_GENERATOR_GLOBAL
#include "llvm/IR/Intrinsics.gen"
#undef GET_INTRINSIC_GENERATOR_GLOBAL
void Intrinsic::getIntrinsicInfoTableEntries(ID id,
SmallVectorImpl<IITDescriptor> &T){
// Check to see if the intrinsic's type was expressible by the table.
unsigned TableVal = IIT_Table[id-1];
// Decode the TableVal into an array of IITValues.
SmallVector<unsigned char, 8> IITValues;
ArrayRef<unsigned char> IITEntries;
unsigned NextElt = 0;
if ((TableVal >> 31) != 0) {
// This is an offset into the IIT_LongEncodingTable.
IITEntries = IIT_LongEncodingTable;
// Strip sentinel bit.
NextElt = (TableVal << 1) >> 1;
} else {
// Decode the TableVal into an array of IITValues. If the entry was encoded
// into a single word in the table itself, decode it now.
do {
IITValues.push_back(TableVal & 0xF);
TableVal >>= 4;
} while (TableVal);
IITEntries = IITValues;
NextElt = 0;
}
// Okay, decode the table into the output vector of IITDescriptors.
DecodeIITType(NextElt, IITEntries, T);
while (NextElt != IITEntries.size() && IITEntries[NextElt] != 0)
DecodeIITType(NextElt, IITEntries, T);
}
static Type *DecodeFixedType(ArrayRef<Intrinsic::IITDescriptor> &Infos,
ArrayRef<Type*> Tys, LLVMContext &Context) {
using namespace Intrinsic;
IITDescriptor D = Infos.front();
Infos = Infos.slice(1);
switch (D.Kind) {
case IITDescriptor::Void: return Type::getVoidTy(Context);
case IITDescriptor::VarArg: return Type::getVoidTy(Context);
case IITDescriptor::MMX: return Type::getX86_MMXTy(Context);
case IITDescriptor::Token: return Type::getTokenTy(Context);
case IITDescriptor::Metadata: return Type::getMetadataTy(Context);
case IITDescriptor::Half: return Type::getHalfTy(Context);
case IITDescriptor::Float: return Type::getFloatTy(Context);
case IITDescriptor::Double: return Type::getDoubleTy(Context);
case IITDescriptor::Integer:
return IntegerType::get(Context, D.Integer_Width);
case IITDescriptor::Vector:
return VectorType::get(DecodeFixedType(Infos, Tys, Context),D.Vector_Width);
case IITDescriptor::Pointer:
return PointerType::get(DecodeFixedType(Infos, Tys, Context),
D.Pointer_AddressSpace);
case IITDescriptor::Struct: {
Type *Elts[5];
assert(D.Struct_NumElements <= 5 && "Can't handle this yet");
for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
Elts[i] = DecodeFixedType(Infos, Tys, Context);
return StructType::get(Context, makeArrayRef(Elts,D.Struct_NumElements));
}
case IITDescriptor::Argument:
return Tys[D.getArgumentNumber()];
case IITDescriptor::ExtendArgument: {
Type *Ty = Tys[D.getArgumentNumber()];
if (VectorType *VTy = dyn_cast<VectorType>(Ty))
return VectorType::getExtendedElementVectorType(VTy);
return IntegerType::get(Context, 2 * cast<IntegerType>(Ty)->getBitWidth());
}
case IITDescriptor::TruncArgument: {
Type *Ty = Tys[D.getArgumentNumber()];
if (VectorType *VTy = dyn_cast<VectorType>(Ty))
return VectorType::getTruncatedElementVectorType(VTy);
IntegerType *ITy = cast<IntegerType>(Ty);
assert(ITy->getBitWidth() % 2 == 0);
return IntegerType::get(Context, ITy->getBitWidth() / 2);
}
case IITDescriptor::HalfVecArgument:
return VectorType::getHalfElementsVectorType(cast<VectorType>(
Tys[D.getArgumentNumber()]));
case IITDescriptor::SameVecWidthArgument: {
Type *EltTy = DecodeFixedType(Infos, Tys, Context);
Type *Ty = Tys[D.getArgumentNumber()];
if (VectorType *VTy = dyn_cast<VectorType>(Ty)) {
return VectorType::get(EltTy, VTy->getNumElements());
}
llvm_unreachable("unhandled");
}
case IITDescriptor::PtrToArgument: {
Type *Ty = Tys[D.getArgumentNumber()];
return PointerType::getUnqual(Ty);
}
case IITDescriptor::PtrToElt: {
Type *Ty = Tys[D.getArgumentNumber()];
VectorType *VTy = dyn_cast<VectorType>(Ty);
if (!VTy)
llvm_unreachable("Expected an argument of Vector Type");
Type *EltTy = VTy->getVectorElementType();
return PointerType::getUnqual(EltTy);
}
case IITDescriptor::VecOfPtrsToElt: {
Type *Ty = Tys[D.getArgumentNumber()];
VectorType *VTy = dyn_cast<VectorType>(Ty);
if (!VTy)
llvm_unreachable("Expected an argument of Vector Type");
Type *EltTy = VTy->getVectorElementType();
return VectorType::get(PointerType::getUnqual(EltTy),
VTy->getNumElements());
}
}
llvm_unreachable("unhandled");
}
FunctionType *Intrinsic::getType(LLVMContext &Context,
ID id, ArrayRef<Type*> Tys) {
SmallVector<IITDescriptor, 8> Table;
getIntrinsicInfoTableEntries(id, Table);
ArrayRef<IITDescriptor> TableRef = Table;
Type *ResultTy = DecodeFixedType(TableRef, Tys, Context);
SmallVector<Type*, 8> ArgTys;
while (!TableRef.empty())
ArgTys.push_back(DecodeFixedType(TableRef, Tys, Context));
// DecodeFixedType returns Void for IITDescriptor::Void and IITDescriptor::VarArg
// If we see void type as the type of the last argument, it is vararg intrinsic
if (!ArgTys.empty() && ArgTys.back()->isVoidTy()) {
ArgTys.pop_back();
return FunctionType::get(ResultTy, ArgTys, true);
}
return FunctionType::get(ResultTy, ArgTys, false);
}
bool Intrinsic::isOverloaded(ID id) {
#define GET_INTRINSIC_OVERLOAD_TABLE
#include "llvm/IR/Intrinsics.gen"
#undef GET_INTRINSIC_OVERLOAD_TABLE
}
bool Intrinsic::isLeaf(ID id) {
switch (id) {
default:
return true;
case Intrinsic::experimental_gc_statepoint:
case Intrinsic::experimental_patchpoint_void:
case Intrinsic::experimental_patchpoint_i64:
return false;
}
}
/// This defines the "Intrinsic::getAttributes(ID id)" method.
#define GET_INTRINSIC_ATTRIBUTES
#include "llvm/IR/Intrinsics.gen"
#undef GET_INTRINSIC_ATTRIBUTES
Function *Intrinsic::getDeclaration(Module *M, ID id, ArrayRef<Type*> Tys) {
// There can never be multiple globals with the same name of different types,
// because intrinsics must be a specific type.
return
cast<Function>(M->getOrInsertFunction(getName(id, Tys),
getType(M->getContext(), id, Tys)));
}
// This defines the "Intrinsic::getIntrinsicForGCCBuiltin()" method.
#define GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
#include "llvm/IR/Intrinsics.gen"
#undef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
// This defines the "Intrinsic::getIntrinsicForMSBuiltin()" method.
#define GET_LLVM_INTRINSIC_FOR_MS_BUILTIN
#include "llvm/IR/Intrinsics.gen"
#undef GET_LLVM_INTRINSIC_FOR_MS_BUILTIN
bool Intrinsic::matchIntrinsicType(Type *Ty, ArrayRef<Intrinsic::IITDescriptor> &Infos,
SmallVectorImpl<Type*> &ArgTys) {
using namespace Intrinsic;
// If we ran out of descriptors, there are too many arguments.
if (Infos.empty()) return true;
IITDescriptor D = Infos.front();
Infos = Infos.slice(1);
switch (D.Kind) {
case IITDescriptor::Void: return !Ty->isVoidTy();
case IITDescriptor::VarArg: return true;
case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
case IITDescriptor::Token: return !Ty->isTokenTy();
case IITDescriptor::Metadata: return !Ty->isMetadataTy();
case IITDescriptor::Half: return !Ty->isHalfTy();
case IITDescriptor::Float: return !Ty->isFloatTy();
case IITDescriptor::Double: return !Ty->isDoubleTy();
case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
case IITDescriptor::Vector: {
VectorType *VT = dyn_cast<VectorType>(Ty);
return !VT || VT->getNumElements() != D.Vector_Width ||
matchIntrinsicType(VT->getElementType(), Infos, ArgTys);
}
case IITDescriptor::Pointer: {
PointerType *PT = dyn_cast<PointerType>(Ty);
return !PT || PT->getAddressSpace() != D.Pointer_AddressSpace ||
matchIntrinsicType(PT->getElementType(), Infos, ArgTys);
}
case IITDescriptor::Struct: {
StructType *ST = dyn_cast<StructType>(Ty);
if (!ST || ST->getNumElements() != D.Struct_NumElements)
return true;
for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
if (matchIntrinsicType(ST->getElementType(i), Infos, ArgTys))
return true;
return false;
}
case IITDescriptor::Argument:
// Two cases here - If this is the second occurrence of an argument, verify
// that the later instance matches the previous instance.
if (D.getArgumentNumber() < ArgTys.size())
return Ty != ArgTys[D.getArgumentNumber()];
// Otherwise, if this is the first instance of an argument, record it and
// verify the "Any" kind.
assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
ArgTys.push_back(Ty);
switch (D.getArgumentKind()) {
case IITDescriptor::AK_Any: return false; // Success
case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
}
llvm_unreachable("all argument kinds not covered");
case IITDescriptor::ExtendArgument: {
// This may only be used when referring to a previous vector argument.
if (D.getArgumentNumber() >= ArgTys.size())
return true;
Type *NewTy = ArgTys[D.getArgumentNumber()];
if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
NewTy = VectorType::getExtendedElementVectorType(VTy);
else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
NewTy = IntegerType::get(ITy->getContext(), 2 * ITy->getBitWidth());
else
return true;
return Ty != NewTy;
}
case IITDescriptor::TruncArgument: {
// This may only be used when referring to a previous vector argument.
if (D.getArgumentNumber() >= ArgTys.size())
return true;
Type *NewTy = ArgTys[D.getArgumentNumber()];
if (VectorType *VTy = dyn_cast<VectorType>(NewTy))
NewTy = VectorType::getTruncatedElementVectorType(VTy);
else if (IntegerType *ITy = dyn_cast<IntegerType>(NewTy))
NewTy = IntegerType::get(ITy->getContext(), ITy->getBitWidth() / 2);
else
return true;
return Ty != NewTy;
}
case IITDescriptor::HalfVecArgument:
// This may only be used when referring to a previous vector argument.
return D.getArgumentNumber() >= ArgTys.size() ||
!isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
VectorType::getHalfElementsVectorType(
cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
case IITDescriptor::SameVecWidthArgument: {
if (D.getArgumentNumber() >= ArgTys.size())
return true;
VectorType * ReferenceType =
dyn_cast<VectorType>(ArgTys[D.getArgumentNumber()]);
VectorType *ThisArgType = dyn_cast<VectorType>(Ty);
if (!ThisArgType || !ReferenceType ||
(ReferenceType->getVectorNumElements() !=
ThisArgType->getVectorNumElements()))
return true;
return matchIntrinsicType(ThisArgType->getVectorElementType(),
Infos, ArgTys);
}
case IITDescriptor::PtrToArgument: {
if (D.getArgumentNumber() >= ArgTys.size())
return true;
Type * ReferenceType = ArgTys[D.getArgumentNumber()];
PointerType *ThisArgType = dyn_cast<PointerType>(Ty);
return (!ThisArgType || ThisArgType->getElementType() != ReferenceType);
}
case IITDescriptor::PtrToElt: {
if (D.getArgumentNumber() >= ArgTys.size())
return true;
VectorType * ReferenceType =
dyn_cast<VectorType> (ArgTys[D.getArgumentNumber()]);
PointerType *ThisArgType = dyn_cast<PointerType>(Ty);
return (!ThisArgType || !ReferenceType ||
ThisArgType->getElementType() != ReferenceType->getElementType());
}
case IITDescriptor::VecOfPtrsToElt: {
if (D.getArgumentNumber() >= ArgTys.size())
return true;
VectorType * ReferenceType =
dyn_cast<VectorType> (ArgTys[D.getArgumentNumber()]);
VectorType *ThisArgVecTy = dyn_cast<VectorType>(Ty);
if (!ThisArgVecTy || !ReferenceType ||
(ReferenceType->getVectorNumElements() !=
ThisArgVecTy->getVectorNumElements()))
return true;
PointerType *ThisArgEltTy =
dyn_cast<PointerType>(ThisArgVecTy->getVectorElementType());
if (!ThisArgEltTy)
return true;
return ThisArgEltTy->getElementType() !=
ReferenceType->getVectorElementType();
}
}
llvm_unreachable("unhandled");
}
bool
Intrinsic::matchIntrinsicVarArg(bool isVarArg,
ArrayRef<Intrinsic::IITDescriptor> &Infos) {
// If there are no descriptors left, then it can't be a vararg.
if (Infos.empty())
return isVarArg;
// There should be only one descriptor remaining at this point.
if (Infos.size() != 1)
return true;
// Check and verify the descriptor.
IITDescriptor D = Infos.front();
Infos = Infos.slice(1);
if (D.Kind == IITDescriptor::VarArg)
return !isVarArg;
return true;
}
Optional<Function*> Intrinsic::remangleIntrinsicFunction(Function *F) {
Intrinsic::ID ID = F->getIntrinsicID();
if (!ID)
return None;
FunctionType *FTy = F->getFunctionType();
// Accumulate an array of overloaded types for the given intrinsic
SmallVector<Type *, 4> ArgTys;
{
SmallVector<Intrinsic::IITDescriptor, 8> Table;
getIntrinsicInfoTableEntries(ID, Table);
ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
// If we encounter any problems matching the signature with the descriptor
// just give up remangling. It's up to verifier to report the discrepancy.
if (Intrinsic::matchIntrinsicType(FTy->getReturnType(), TableRef, ArgTys))
return None;
for (auto Ty : FTy->params())
if (Intrinsic::matchIntrinsicType(Ty, TableRef, ArgTys))
return None;
if (Intrinsic::matchIntrinsicVarArg(FTy->isVarArg(), TableRef))
return None;
}
StringRef Name = F->getName();
if (Name == Intrinsic::getName(ID, ArgTys))
return None;
auto NewDecl = Intrinsic::getDeclaration(F->getParent(), ID, ArgTys);
NewDecl->setCallingConv(F->getCallingConv());
assert(NewDecl->getFunctionType() == FTy && "Shouldn't change the signature");
return NewDecl;
}
/// hasAddressTaken - returns true if there are any uses of this function
/// other than direct calls or invokes to it.
bool Function::hasAddressTaken(const User* *PutOffender) const {
for (const Use &U : uses()) {
const User *FU = U.getUser();
if (isa<BlockAddress>(FU))
continue;
if (!isa<CallInst>(FU) && !isa<InvokeInst>(FU)) {
if (PutOffender)
*PutOffender = FU;
return true;
}
ImmutableCallSite CS(cast<Instruction>(FU));
if (!CS.isCallee(&U)) {
if (PutOffender)
*PutOffender = FU;
return true;
}
}
return false;
}
bool Function::isDefTriviallyDead() const {
// Check the linkage
if (!hasLinkOnceLinkage() && !hasLocalLinkage() &&
!hasAvailableExternallyLinkage())
return false;
// Check if the function is used by anything other than a blockaddress.
for (const User *U : users())
if (!isa<BlockAddress>(U))
return false;
return true;
}
/// callsFunctionThatReturnsTwice - Return true if the function has a call to
/// setjmp or other function that gcc recognizes as "returning twice".
bool Function::callsFunctionThatReturnsTwice() const {
for (const_inst_iterator
I = inst_begin(this), E = inst_end(this); I != E; ++I) {
ImmutableCallSite CS(&*I);
if (CS && CS.hasFnAttr(Attribute::ReturnsTwice))
return true;
}
return false;
}
Constant *Function::getPersonalityFn() const {
assert(hasPersonalityFn() && getNumOperands());
return cast<Constant>(Op<0>());
}
void Function::setPersonalityFn(Constant *Fn) {
setHungoffOperand<0>(Fn);
setValueSubclassDataBit(3, Fn != nullptr);
}
Constant *Function::getPrefixData() const {
assert(hasPrefixData() && getNumOperands());
return cast<Constant>(Op<1>());
}
void Function::setPrefixData(Constant *PrefixData) {
setHungoffOperand<1>(PrefixData);
setValueSubclassDataBit(1, PrefixData != nullptr);
}
Constant *Function::getPrologueData() const {
assert(hasPrologueData() && getNumOperands());
return cast<Constant>(Op<2>());
}
void Function::setPrologueData(Constant *PrologueData) {
setHungoffOperand<2>(PrologueData);
setValueSubclassDataBit(2, PrologueData != nullptr);
}
void Function::allocHungoffUselist() {
// If we've already allocated a uselist, stop here.
if (getNumOperands())
return;
allocHungoffUses(3, /*IsPhi=*/ false);
setNumHungOffUseOperands(3);
// Initialize the uselist with placeholder operands to allow traversal.
auto *CPN = ConstantPointerNull::get(Type::getInt1PtrTy(getContext(), 0));
Op<0>().set(CPN);
Op<1>().set(CPN);
Op<2>().set(CPN);
}
template <int Idx>
void Function::setHungoffOperand(Constant *C) {
if (C) {
allocHungoffUselist();
Op<Idx>().set(C);
} else if (getNumOperands()) {
Op<Idx>().set(
ConstantPointerNull::get(Type::getInt1PtrTy(getContext(), 0)));
}
}
void Function::setValueSubclassDataBit(unsigned Bit, bool On) {
assert(Bit < 16 && "SubclassData contains only 16 bits");
if (On)
setValueSubclassData(getSubclassDataFromValue() | (1 << Bit));
else
setValueSubclassData(getSubclassDataFromValue() & ~(1 << Bit));
}
void Function::setEntryCount(uint64_t Count,
const DenseSet<GlobalValue::GUID> *S) {
MDBuilder MDB(getContext());
setMetadata(LLVMContext::MD_prof, MDB.createFunctionEntryCount(Count, S));
}
Optional<uint64_t> Function::getEntryCount() const {
MDNode *MD = getMetadata(LLVMContext::MD_prof);
if (MD && MD->getOperand(0))
if (MDString *MDS = dyn_cast<MDString>(MD->getOperand(0)))
if (MDS->getString().equals("function_entry_count")) {
ConstantInt *CI = mdconst::extract<ConstantInt>(MD->getOperand(1));
uint64_t Count = CI->getValue().getZExtValue();
if (Count == 0)
return None;
return Count;
}
return None;
}
DenseSet<GlobalValue::GUID> Function::getImportGUIDs() const {
DenseSet<GlobalValue::GUID> R;
if (MDNode *MD = getMetadata(LLVMContext::MD_prof))
if (MDString *MDS = dyn_cast<MDString>(MD->getOperand(0)))
if (MDS->getString().equals("function_entry_count"))
for (unsigned i = 2; i < MD->getNumOperands(); i++)
R.insert(mdconst::extract<ConstantInt>(MD->getOperand(i))
->getValue()
.getZExtValue());
return R;
}
void Function::setSectionPrefix(StringRef Prefix) {
MDBuilder MDB(getContext());
setMetadata(LLVMContext::MD_section_prefix,
MDB.createFunctionSectionPrefix(Prefix));
}
Optional<StringRef> Function::getSectionPrefix() const {
if (MDNode *MD = getMetadata(LLVMContext::MD_section_prefix)) {
assert(dyn_cast<MDString>(MD->getOperand(0))
->getString()
.equals("function_section_prefix") &&
"Metadata not match");
return dyn_cast<MDString>(MD->getOperand(1))->getString();
}
return None;
}
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