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Instructions.cpp
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//===- Instructions.cpp - Implement the LLVM instructions -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements all of the non-inline methods for the LLVM instruction
// classes.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/Instructions.h"
#include "LLVMContextImpl.h"
#include "llvm/ADT/None.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Twine.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/CallSite.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Value.h"
#include "llvm/Support/AtomicOrdering.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <vector>
using namespace llvm;
//===----------------------------------------------------------------------===//
// AllocaInst Class
//===----------------------------------------------------------------------===//
Optional<uint64_t>
AllocaInst::getAllocationSizeInBits(const DataLayout &DL) const {
uint64_t Size = DL.getTypeAllocSizeInBits(getAllocatedType());
if (isArrayAllocation()) {
auto C = dyn_cast<ConstantInt>(getArraySize());
if (!C)
return None;
Size *= C->getZExtValue();
}
return Size;
}
//===----------------------------------------------------------------------===//
// CallSite Class
//===----------------------------------------------------------------------===//
User::op_iterator CallSite::getCallee() const {
return cast<CallBase>(getInstruction())->op_end() - 1;
}
//===----------------------------------------------------------------------===//
// SelectInst Class
//===----------------------------------------------------------------------===//
/// areInvalidOperands - Return a string if the specified operands are invalid
/// for a select operation, otherwise return null.
const char *SelectInst::areInvalidOperands(Value *Op0, Value *Op1, Value *Op2) {
if (Op1->getType() != Op2->getType())
return "both values to select must have same type";
if (Op1->getType()->isTokenTy())
return "select values cannot have token type";
if (VectorType *VT = dyn_cast<VectorType>(Op0->getType())) {
// Vector select.
if (VT->getElementType() != Type::getInt1Ty(Op0->getContext()))
return "vector select condition element type must be i1";
VectorType *ET = dyn_cast<VectorType>(Op1->getType());
if (!ET)
return "selected values for vector select must be vectors";
if (ET->getNumElements() != VT->getNumElements())
return "vector select requires selected vectors to have "
"the same vector length as select condition";
} else if (Op0->getType() != Type::getInt1Ty(Op0->getContext())) {
return "select condition must be i1 or <n x i1>";
}
return nullptr;
}
//===----------------------------------------------------------------------===//
// PHINode Class
//===----------------------------------------------------------------------===//
PHINode::PHINode(const PHINode &PN)
: Instruction(PN.getType(), Instruction::PHI, nullptr, PN.getNumOperands()),
ReservedSpace(PN.getNumOperands()) {
allocHungoffUses(PN.getNumOperands());
std::copy(PN.op_begin(), PN.op_end(), op_begin());
std::copy(PN.block_begin(), PN.block_end(), block_begin());
SubclassOptionalData = PN.SubclassOptionalData;
}
// removeIncomingValue - Remove an incoming value. This is useful if a
// predecessor basic block is deleted.
Value *PHINode::removeIncomingValue(unsigned Idx, bool DeletePHIIfEmpty) {
Value *Removed = getIncomingValue(Idx);
// Move everything after this operand down.
//
// FIXME: we could just swap with the end of the list, then erase. However,
// clients might not expect this to happen. The code as it is thrashes the
// use/def lists, which is kinda lame.
std::copy(op_begin() + Idx + 1, op_end(), op_begin() + Idx);
std::copy(block_begin() + Idx + 1, block_end(), block_begin() + Idx);
// Nuke the last value.
Op<-1>().set(nullptr);
setNumHungOffUseOperands(getNumOperands() - 1);
// If the PHI node is dead, because it has zero entries, nuke it now.
if (getNumOperands() == 0 && DeletePHIIfEmpty) {
// If anyone is using this PHI, make them use a dummy value instead...
replaceAllUsesWith(UndefValue::get(getType()));
eraseFromParent();
}
return Removed;
}
/// growOperands - grow operands - This grows the operand list in response
/// to a push_back style of operation. This grows the number of ops by 1.5
/// times.
///
void PHINode::growOperands() {
unsigned e = getNumOperands();
unsigned NumOps = e + e / 2;
if (NumOps < 2) NumOps = 2; // 2 op PHI nodes are VERY common.
ReservedSpace = NumOps;
growHungoffUses(ReservedSpace, /* IsPhi */ true);
}
/// hasConstantValue - If the specified PHI node always merges together the same
/// value, return the value, otherwise return null.
Value *PHINode::hasConstantValue() const {
// Exploit the fact that phi nodes always have at least one entry.
Value *ConstantValue = getIncomingValue(0);
for (unsigned i = 1, e = getNumIncomingValues(); i != e; ++i)
if (getIncomingValue(i) != ConstantValue && getIncomingValue(i) != this) {
if (ConstantValue != this)
return nullptr; // Incoming values not all the same.
// The case where the first value is this PHI.
ConstantValue = getIncomingValue(i);
}
if (ConstantValue == this)
return UndefValue::get(getType());
return ConstantValue;
}
/// hasConstantOrUndefValue - Whether the specified PHI node always merges
/// together the same value, assuming that undefs result in the same value as
/// non-undefs.
/// Unlike \ref hasConstantValue, this does not return a value because the
/// unique non-undef incoming value need not dominate the PHI node.
bool PHINode::hasConstantOrUndefValue() const {
Value *ConstantValue = nullptr;
for (unsigned i = 0, e = getNumIncomingValues(); i != e; ++i) {
Value *Incoming = getIncomingValue(i);
if (Incoming != this && !isa<UndefValue>(Incoming)) {
if (ConstantValue && ConstantValue != Incoming)
return false;
ConstantValue = Incoming;
}
}
return true;
}
//===----------------------------------------------------------------------===//
// LandingPadInst Implementation
//===----------------------------------------------------------------------===//
LandingPadInst::LandingPadInst(Type *RetTy, unsigned NumReservedValues,
const Twine &NameStr, Instruction *InsertBefore)
: Instruction(RetTy, Instruction::LandingPad, nullptr, 0, InsertBefore) {
init(NumReservedValues, NameStr);
}
LandingPadInst::LandingPadInst(Type *RetTy, unsigned NumReservedValues,
const Twine &NameStr, BasicBlock *InsertAtEnd)
: Instruction(RetTy, Instruction::LandingPad, nullptr, 0, InsertAtEnd) {
init(NumReservedValues, NameStr);
}
LandingPadInst::LandingPadInst(const LandingPadInst &LP)
: Instruction(LP.getType(), Instruction::LandingPad, nullptr,
LP.getNumOperands()),
ReservedSpace(LP.getNumOperands()) {
allocHungoffUses(LP.getNumOperands());
Use *OL = getOperandList();
const Use *InOL = LP.getOperandList();
for (unsigned I = 0, E = ReservedSpace; I != E; ++I)
OL[I] = InOL[I];
setCleanup(LP.isCleanup());
}
LandingPadInst *LandingPadInst::Create(Type *RetTy, unsigned NumReservedClauses,
const Twine &NameStr,
Instruction *InsertBefore) {
return new LandingPadInst(RetTy, NumReservedClauses, NameStr, InsertBefore);
}
LandingPadInst *LandingPadInst::Create(Type *RetTy, unsigned NumReservedClauses,
const Twine &NameStr,
BasicBlock *InsertAtEnd) {
return new LandingPadInst(RetTy, NumReservedClauses, NameStr, InsertAtEnd);
}
void LandingPadInst::init(unsigned NumReservedValues, const Twine &NameStr) {
ReservedSpace = NumReservedValues;
setNumHungOffUseOperands(0);
allocHungoffUses(ReservedSpace);
setName(NameStr);
setCleanup(false);
}
/// growOperands - grow operands - This grows the operand list in response to a
/// push_back style of operation. This grows the number of ops by 2 times.
void LandingPadInst::growOperands(unsigned Size) {
unsigned e = getNumOperands();
if (ReservedSpace >= e + Size) return;
ReservedSpace = (std::max(e, 1U) + Size / 2) * 2;
growHungoffUses(ReservedSpace);
}
void LandingPadInst::addClause(Constant *Val) {
unsigned OpNo = getNumOperands();
growOperands(1);
assert(OpNo < ReservedSpace && "Growing didn't work!");
setNumHungOffUseOperands(getNumOperands() + 1);
getOperandList()[OpNo] = Val;
}
//===----------------------------------------------------------------------===//
// CallBase Implementation
//===----------------------------------------------------------------------===//
Function *CallBase::getCaller() { return getParent()->getParent(); }
unsigned CallBase::getNumSubclassExtraOperandsDynamic() const {
assert(getOpcode() == Instruction::CallBr && "Unexpected opcode!");
return cast<CallBrInst>(this)->getNumIndirectDests() + 1;
}
bool CallBase::isIndirectCall() const {
const Value *V = getCalledValue();
if (isa<Function>(V) || isa<Constant>(V))
return false;
if (const CallInst *CI = dyn_cast<CallInst>(this))
if (CI->isInlineAsm())
return false;
return true;
}
/// Tests if this call site must be tail call optimized. Only a CallInst can
/// be tail call optimized.
bool CallBase::isMustTailCall() const {
if (auto *CI = dyn_cast<CallInst>(this))
return CI->isMustTailCall();
return false;
}
/// Tests if this call site is marked as a tail call.
bool CallBase::isTailCall() const {
if (auto *CI = dyn_cast<CallInst>(this))
return CI->isTailCall();
return false;
}
Intrinsic::ID CallBase::getIntrinsicID() const {
if (auto *F = getCalledFunction())
return F->getIntrinsicID();
return Intrinsic::not_intrinsic;
}
bool CallBase::isReturnNonNull() const {
if (hasRetAttr(Attribute::NonNull))
return true;
if (getDereferenceableBytes(AttributeList::ReturnIndex) > 0 &&
!NullPointerIsDefined(getCaller(),
getType()->getPointerAddressSpace()))
return true;
return false;
}
Value *CallBase::getReturnedArgOperand() const {
unsigned Index;
if (Attrs.hasAttrSomewhere(Attribute::Returned, &Index) && Index)
return getArgOperand(Index - AttributeList::FirstArgIndex);
if (const Function *F = getCalledFunction())
if (F->getAttributes().hasAttrSomewhere(Attribute::Returned, &Index) &&
Index)
return getArgOperand(Index - AttributeList::FirstArgIndex);
return nullptr;
}
bool CallBase::hasRetAttr(Attribute::AttrKind Kind) const {
if (Attrs.hasAttribute(AttributeList::ReturnIndex, Kind))
return true;
// Look at the callee, if available.
if (const Function *F = getCalledFunction())
return F->getAttributes().hasAttribute(AttributeList::ReturnIndex, Kind);
return false;
}
/// Determine whether the argument or parameter has the given attribute.
bool CallBase::paramHasAttr(unsigned ArgNo, Attribute::AttrKind Kind) const {
assert(ArgNo < getNumArgOperands() && "Param index out of bounds!");
if (Attrs.hasParamAttribute(ArgNo, Kind))
return true;
if (const Function *F = getCalledFunction())
return F->getAttributes().hasParamAttribute(ArgNo, Kind);
return false;
}
bool CallBase::hasFnAttrOnCalledFunction(Attribute::AttrKind Kind) const {
if (const Function *F = getCalledFunction())
return F->getAttributes().hasAttribute(AttributeList::FunctionIndex, Kind);
return false;
}
bool CallBase::hasFnAttrOnCalledFunction(StringRef Kind) const {
if (const Function *F = getCalledFunction())
return F->getAttributes().hasAttribute(AttributeList::FunctionIndex, Kind);
return false;
}
CallBase::op_iterator
CallBase::populateBundleOperandInfos(ArrayRef<OperandBundleDef> Bundles,
const unsigned BeginIndex) {
auto It = op_begin() + BeginIndex;
for (auto &B : Bundles)
It = std::copy(B.input_begin(), B.input_end(), It);
auto *ContextImpl = getContext().pImpl;
auto BI = Bundles.begin();
unsigned CurrentIndex = BeginIndex;
for (auto &BOI : bundle_op_infos()) {
assert(BI != Bundles.end() && "Incorrect allocation?");
BOI.Tag = ContextImpl->getOrInsertBundleTag(BI->getTag());
BOI.Begin = CurrentIndex;
BOI.End = CurrentIndex + BI->input_size();
CurrentIndex = BOI.End;
BI++;
}
assert(BI == Bundles.end() && "Incorrect allocation?");
return It;
}
//===----------------------------------------------------------------------===//
// CallInst Implementation
//===----------------------------------------------------------------------===//
void CallInst::init(FunctionType *FTy, Value *Func, ArrayRef<Value *> Args,
ArrayRef<OperandBundleDef> Bundles, const Twine &NameStr) {
this->FTy = FTy;
assert(getNumOperands() == Args.size() + CountBundleInputs(Bundles) + 1 &&
"NumOperands not set up?");
setCalledOperand(Func);
#ifndef NDEBUG
assert((Args.size() == FTy->getNumParams() ||
(FTy->isVarArg() && Args.size() > FTy->getNumParams())) &&
"Calling a function with bad signature!");
for (unsigned i = 0; i != Args.size(); ++i)
assert((i >= FTy->getNumParams() ||
FTy->getParamType(i) == Args[i]->getType()) &&
"Calling a function with a bad signature!");
#endif
llvm::copy(Args, op_begin());
auto It = populateBundleOperandInfos(Bundles, Args.size());
(void)It;
assert(It + 1 == op_end() && "Should add up!");
setName(NameStr);
}
void CallInst::init(FunctionType *FTy, Value *Func, const Twine &NameStr) {
this->FTy = FTy;
assert(getNumOperands() == 1 && "NumOperands not set up?");
setCalledOperand(Func);
assert(FTy->getNumParams() == 0 && "Calling a function with bad signature");
setName(NameStr);
}
CallInst::CallInst(FunctionType *Ty, Value *Func, const Twine &Name,
Instruction *InsertBefore)
: CallBase(Ty->getReturnType(), Instruction::Call,
OperandTraits<CallBase>::op_end(this) - 1, 1, InsertBefore) {
init(Ty, Func, Name);
}
CallInst::CallInst(FunctionType *Ty, Value *Func, const Twine &Name,
BasicBlock *InsertAtEnd)
: CallBase(Ty->getReturnType(), Instruction::Call,
OperandTraits<CallBase>::op_end(this) - 1, 1, InsertAtEnd) {
init(Ty, Func, Name);
}
CallInst::CallInst(const CallInst &CI)
: CallBase(CI.Attrs, CI.FTy, CI.getType(), Instruction::Call,
OperandTraits<CallBase>::op_end(this) - CI.getNumOperands(),
CI.getNumOperands()) {
setTailCallKind(CI.getTailCallKind());
setCallingConv(CI.getCallingConv());
std::copy(CI.op_begin(), CI.op_end(), op_begin());
std::copy(CI.bundle_op_info_begin(), CI.bundle_op_info_end(),
bundle_op_info_begin());
SubclassOptionalData = CI.SubclassOptionalData;
}
CallInst *CallInst::Create(CallInst *CI, ArrayRef<OperandBundleDef> OpB,
Instruction *InsertPt) {
std::vector<Value *> Args(CI->arg_begin(), CI->arg_end());
auto *NewCI = CallInst::Create(CI->getFunctionType(), CI->getCalledValue(),
Args, OpB, CI->getName(), InsertPt);
NewCI->setTailCallKind(CI->getTailCallKind());
NewCI->setCallingConv(CI->getCallingConv());
NewCI->SubclassOptionalData = CI->SubclassOptionalData;
NewCI->setAttributes(CI->getAttributes());
NewCI->setDebugLoc(CI->getDebugLoc());
return NewCI;
}
// Update profile weight for call instruction by scaling it using the ratio
// of S/T. The meaning of "branch_weights" meta data for call instruction is
// transfered to represent call count.
void CallInst::updateProfWeight(uint64_t S, uint64_t T) {
auto *ProfileData = getMetadata(LLVMContext::MD_prof);
if (ProfileData == nullptr)
return;
auto *ProfDataName = dyn_cast<MDString>(ProfileData->getOperand(0));
if (!ProfDataName || (!ProfDataName->getString().equals("branch_weights") &&
!ProfDataName->getString().equals("VP")))
return;
if (T == 0) {
LLVM_DEBUG(dbgs() << "Attempting to update profile weights will result in "
"div by 0. Ignoring. Likely the function "
<< getParent()->getParent()->getName()
<< " has 0 entry count, and contains call instructions "
"with non-zero prof info.");
return;
}
MDBuilder MDB(getContext());
SmallVector<Metadata *, 3> Vals;
Vals.push_back(ProfileData->getOperand(0));
APInt APS(128, S), APT(128, T);
if (ProfDataName->getString().equals("branch_weights") &&
ProfileData->getNumOperands() > 0) {
// Using APInt::div may be expensive, but most cases should fit 64 bits.
APInt Val(128, mdconst::dyn_extract<ConstantInt>(ProfileData->getOperand(1))
->getValue()
.getZExtValue());
Val *= APS;
Vals.push_back(MDB.createConstant(ConstantInt::get(
Type::getInt64Ty(getContext()), Val.udiv(APT).getLimitedValue())));
} else if (ProfDataName->getString().equals("VP"))
for (unsigned i = 1; i < ProfileData->getNumOperands(); i += 2) {
// The first value is the key of the value profile, which will not change.
Vals.push_back(ProfileData->getOperand(i));
// Using APInt::div may be expensive, but most cases should fit 64 bits.
APInt Val(128,
mdconst::dyn_extract<ConstantInt>(ProfileData->getOperand(i + 1))
->getValue()
.getZExtValue());
Val *= APS;
Vals.push_back(MDB.createConstant(
ConstantInt::get(Type::getInt64Ty(getContext()),
Val.udiv(APT).getLimitedValue())));
}
setMetadata(LLVMContext::MD_prof, MDNode::get(getContext(), Vals));
}
/// IsConstantOne - Return true only if val is constant int 1
static bool IsConstantOne(Value *val) {
assert(val && "IsConstantOne does not work with nullptr val");
const ConstantInt *CVal = dyn_cast<ConstantInt>(val);
return CVal && CVal->isOne();
}
static Instruction *createMalloc(Instruction *InsertBefore,
BasicBlock *InsertAtEnd, Type *IntPtrTy,
Type *AllocTy, Value *AllocSize,
Value *ArraySize,
ArrayRef<OperandBundleDef> OpB,
Function *MallocF, const Twine &Name) {
assert(((!InsertBefore && InsertAtEnd) || (InsertBefore && !InsertAtEnd)) &&
"createMalloc needs either InsertBefore or InsertAtEnd");
// malloc(type) becomes:
// bitcast (i8* malloc(typeSize)) to type*
// malloc(type, arraySize) becomes:
// bitcast (i8* malloc(typeSize*arraySize)) to type*
if (!ArraySize)
ArraySize = ConstantInt::get(IntPtrTy, 1);
else if (ArraySize->getType() != IntPtrTy) {
if (InsertBefore)
ArraySize = CastInst::CreateIntegerCast(ArraySize, IntPtrTy, false,
"", InsertBefore);
else
ArraySize = CastInst::CreateIntegerCast(ArraySize, IntPtrTy, false,
"", InsertAtEnd);
}
if (!IsConstantOne(ArraySize)) {
if (IsConstantOne(AllocSize)) {
AllocSize = ArraySize; // Operand * 1 = Operand
} else if (Constant *CO = dyn_cast<Constant>(ArraySize)) {
Constant *Scale = ConstantExpr::getIntegerCast(CO, IntPtrTy,
false /*ZExt*/);
// Malloc arg is constant product of type size and array size
AllocSize = ConstantExpr::getMul(Scale, cast<Constant>(AllocSize));
} else {
// Multiply type size by the array size...
if (InsertBefore)
AllocSize = BinaryOperator::CreateMul(ArraySize, AllocSize,
"mallocsize", InsertBefore);
else
AllocSize = BinaryOperator::CreateMul(ArraySize, AllocSize,
"mallocsize", InsertAtEnd);
}
}
assert(AllocSize->getType() == IntPtrTy && "malloc arg is wrong size");
// Create the call to Malloc.
BasicBlock *BB = InsertBefore ? InsertBefore->getParent() : InsertAtEnd;
Module *M = BB->getParent()->getParent();
Type *BPTy = Type::getInt8PtrTy(BB->getContext());
FunctionCallee MallocFunc = MallocF;
if (!MallocFunc)
// prototype malloc as "void *malloc(size_t)"
MallocFunc = M->getOrInsertFunction("malloc", BPTy, IntPtrTy);
PointerType *AllocPtrType = PointerType::getUnqual(AllocTy);
CallInst *MCall = nullptr;
Instruction *Result = nullptr;
if (InsertBefore) {
MCall = CallInst::Create(MallocFunc, AllocSize, OpB, "malloccall",
InsertBefore);
Result = MCall;
if (Result->getType() != AllocPtrType)
// Create a cast instruction to convert to the right type...
Result = new BitCastInst(MCall, AllocPtrType, Name, InsertBefore);
} else {
MCall = CallInst::Create(MallocFunc, AllocSize, OpB, "malloccall");
Result = MCall;
if (Result->getType() != AllocPtrType) {
InsertAtEnd->getInstList().push_back(MCall);
// Create a cast instruction to convert to the right type...
Result = new BitCastInst(MCall, AllocPtrType, Name);
}
}
MCall->setTailCall();
if (Function *F = dyn_cast<Function>(MallocFunc.getCallee())) {
MCall->setCallingConv(F->getCallingConv());
if (!F->returnDoesNotAlias())
F->setReturnDoesNotAlias();
}
assert(!MCall->getType()->isVoidTy() && "Malloc has void return type");
return Result;
}
/// CreateMalloc - Generate the IR for a call to malloc:
/// 1. Compute the malloc call's argument as the specified type's size,
/// possibly multiplied by the array size if the array size is not
/// constant 1.
/// 2. Call malloc with that argument.
/// 3. Bitcast the result of the malloc call to the specified type.
Instruction *CallInst::CreateMalloc(Instruction *InsertBefore,
Type *IntPtrTy, Type *AllocTy,
Value *AllocSize, Value *ArraySize,
Function *MallocF,
const Twine &Name) {
return createMalloc(InsertBefore, nullptr, IntPtrTy, AllocTy, AllocSize,
ArraySize, None, MallocF, Name);
}
Instruction *CallInst::CreateMalloc(Instruction *InsertBefore,
Type *IntPtrTy, Type *AllocTy,
Value *AllocSize, Value *ArraySize,
ArrayRef<OperandBundleDef> OpB,
Function *MallocF,
const Twine &Name) {
return createMalloc(InsertBefore, nullptr, IntPtrTy, AllocTy, AllocSize,
ArraySize, OpB, MallocF, Name);
}
/// CreateMalloc - Generate the IR for a call to malloc:
/// 1. Compute the malloc call's argument as the specified type's size,
/// possibly multiplied by the array size if the array size is not
/// constant 1.
/// 2. Call malloc with that argument.
/// 3. Bitcast the result of the malloc call to the specified type.
/// Note: This function does not add the bitcast to the basic block, that is the
/// responsibility of the caller.
Instruction *CallInst::CreateMalloc(BasicBlock *InsertAtEnd,
Type *IntPtrTy, Type *AllocTy,
Value *AllocSize, Value *ArraySize,
Function *MallocF, const Twine &Name) {
return createMalloc(nullptr, InsertAtEnd, IntPtrTy, AllocTy, AllocSize,
ArraySize, None, MallocF, Name);
}
Instruction *CallInst::CreateMalloc(BasicBlock *InsertAtEnd,
Type *IntPtrTy, Type *AllocTy,
Value *AllocSize, Value *ArraySize,
ArrayRef<OperandBundleDef> OpB,
Function *MallocF, const Twine &Name) {
return createMalloc(nullptr, InsertAtEnd, IntPtrTy, AllocTy, AllocSize,
ArraySize, OpB, MallocF, Name);
}
static Instruction *createFree(Value *Source,
ArrayRef<OperandBundleDef> Bundles,
Instruction *InsertBefore,
BasicBlock *InsertAtEnd) {
assert(((!InsertBefore && InsertAtEnd) || (InsertBefore && !InsertAtEnd)) &&
"createFree needs either InsertBefore or InsertAtEnd");
assert(Source->getType()->isPointerTy() &&
"Can not free something of nonpointer type!");
BasicBlock *BB = InsertBefore ? InsertBefore->getParent() : InsertAtEnd;
Module *M = BB->getParent()->getParent();
Type *VoidTy = Type::getVoidTy(M->getContext());
Type *IntPtrTy = Type::getInt8PtrTy(M->getContext());
// prototype free as "void free(void*)"
FunctionCallee FreeFunc = M->getOrInsertFunction("free", VoidTy, IntPtrTy);
CallInst *Result = nullptr;
Value *PtrCast = Source;
if (InsertBefore) {
if (Source->getType() != IntPtrTy)
PtrCast = new BitCastInst(Source, IntPtrTy, "", InsertBefore);
Result = CallInst::Create(FreeFunc, PtrCast, Bundles, "", InsertBefore);
} else {
if (Source->getType() != IntPtrTy)
PtrCast = new BitCastInst(Source, IntPtrTy, "", InsertAtEnd);
Result = CallInst::Create(FreeFunc, PtrCast, Bundles, "");
}
Result->setTailCall();
if (Function *F = dyn_cast<Function>(FreeFunc.getCallee()))
Result->setCallingConv(F->getCallingConv());
return Result;
}
/// CreateFree - Generate the IR for a call to the builtin free function.
Instruction *CallInst::CreateFree(Value *Source, Instruction *InsertBefore) {
return createFree(Source, None, InsertBefore, nullptr);
}
Instruction *CallInst::CreateFree(Value *Source,
ArrayRef<OperandBundleDef> Bundles,
Instruction *InsertBefore) {
return createFree(Source, Bundles, InsertBefore, nullptr);
}
/// CreateFree - Generate the IR for a call to the builtin free function.
/// Note: This function does not add the call to the basic block, that is the
/// responsibility of the caller.
Instruction *CallInst::CreateFree(Value *Source, BasicBlock *InsertAtEnd) {
Instruction *FreeCall = createFree(Source, None, nullptr, InsertAtEnd);
assert(FreeCall && "CreateFree did not create a CallInst");
return FreeCall;
}
Instruction *CallInst::CreateFree(Value *Source,
ArrayRef<OperandBundleDef> Bundles,
BasicBlock *InsertAtEnd) {
Instruction *FreeCall = createFree(Source, Bundles, nullptr, InsertAtEnd);
assert(FreeCall && "CreateFree did not create a CallInst");
return FreeCall;
}
//===----------------------------------------------------------------------===//
// InvokeInst Implementation
//===----------------------------------------------------------------------===//
void InvokeInst::init(FunctionType *FTy, Value *Fn, BasicBlock *IfNormal,
BasicBlock *IfException, ArrayRef<Value *> Args,
ArrayRef<OperandBundleDef> Bundles,
const Twine &NameStr) {
this->FTy = FTy;
assert((int)getNumOperands() ==
ComputeNumOperands(Args.size(), CountBundleInputs(Bundles)) &&
"NumOperands not set up?");
setNormalDest(IfNormal);
setUnwindDest(IfException);
setCalledOperand(Fn);
#ifndef NDEBUG
assert(((Args.size() == FTy->getNumParams()) ||
(FTy->isVarArg() && Args.size() > FTy->getNumParams())) &&
"Invoking a function with bad signature");
for (unsigned i = 0, e = Args.size(); i != e; i++)
assert((i >= FTy->getNumParams() ||
FTy->getParamType(i) == Args[i]->getType()) &&
"Invoking a function with a bad signature!");
#endif
llvm::copy(Args, op_begin());
auto It = populateBundleOperandInfos(Bundles, Args.size());
(void)It;
assert(It + 3 == op_end() && "Should add up!");
setName(NameStr);
}
InvokeInst::InvokeInst(const InvokeInst &II)
: CallBase(II.Attrs, II.FTy, II.getType(), Instruction::Invoke,
OperandTraits<CallBase>::op_end(this) - II.getNumOperands(),
II.getNumOperands()) {
setCallingConv(II.getCallingConv());
std::copy(II.op_begin(), II.op_end(), op_begin());
std::copy(II.bundle_op_info_begin(), II.bundle_op_info_end(),
bundle_op_info_begin());
SubclassOptionalData = II.SubclassOptionalData;
}
InvokeInst *InvokeInst::Create(InvokeInst *II, ArrayRef<OperandBundleDef> OpB,
Instruction *InsertPt) {
std::vector<Value *> Args(II->arg_begin(), II->arg_end());
auto *NewII = InvokeInst::Create(II->getFunctionType(), II->getCalledValue(),
II->getNormalDest(), II->getUnwindDest(),
Args, OpB, II->getName(), InsertPt);
NewII->setCallingConv(II->getCallingConv());
NewII->SubclassOptionalData = II->SubclassOptionalData;
NewII->setAttributes(II->getAttributes());
NewII->setDebugLoc(II->getDebugLoc());
return NewII;
}
LandingPadInst *InvokeInst::getLandingPadInst() const {
return cast<LandingPadInst>(getUnwindDest()->getFirstNonPHI());
}
//===----------------------------------------------------------------------===//
// CallBrInst Implementation
//===----------------------------------------------------------------------===//
void CallBrInst::init(FunctionType *FTy, Value *Fn, BasicBlock *Fallthrough,
ArrayRef<BasicBlock *> IndirectDests,
ArrayRef<Value *> Args,
ArrayRef<OperandBundleDef> Bundles,
const Twine &NameStr) {
this->FTy = FTy;
assert((int)getNumOperands() ==
ComputeNumOperands(Args.size(), IndirectDests.size(),
CountBundleInputs(Bundles)) &&
"NumOperands not set up?");
NumIndirectDests = IndirectDests.size();
setDefaultDest(Fallthrough);
for (unsigned i = 0; i != NumIndirectDests; ++i)
setIndirectDest(i, IndirectDests[i]);
setCalledOperand(Fn);
#ifndef NDEBUG
assert(((Args.size() == FTy->getNumParams()) ||
(FTy->isVarArg() && Args.size() > FTy->getNumParams())) &&
"Calling a function with bad signature");
for (unsigned i = 0, e = Args.size(); i != e; i++)
assert((i >= FTy->getNumParams() ||
FTy->getParamType(i) == Args[i]->getType()) &&
"Calling a function with a bad signature!");
#endif
std::copy(Args.begin(), Args.end(), op_begin());
auto It = populateBundleOperandInfos(Bundles, Args.size());
(void)It;
assert(It + 2 + IndirectDests.size() == op_end() && "Should add up!");
setName(NameStr);
}
CallBrInst::CallBrInst(const CallBrInst &CBI)
: CallBase(CBI.Attrs, CBI.FTy, CBI.getType(), Instruction::CallBr,
OperandTraits<CallBase>::op_end(this) - CBI.getNumOperands(),
CBI.getNumOperands()) {
setCallingConv(CBI.getCallingConv());
std::copy(CBI.op_begin(), CBI.op_end(), op_begin());
std::copy(CBI.bundle_op_info_begin(), CBI.bundle_op_info_end(),
bundle_op_info_begin());
SubclassOptionalData = CBI.SubclassOptionalData;
NumIndirectDests = CBI.NumIndirectDests;
}
CallBrInst *CallBrInst::Create(CallBrInst *CBI, ArrayRef<OperandBundleDef> OpB,
Instruction *InsertPt) {
std::vector<Value *> Args(CBI->arg_begin(), CBI->arg_end());
auto *NewCBI = CallBrInst::Create(CBI->getFunctionType(),
CBI->getCalledValue(),
CBI->getDefaultDest(),
CBI->getIndirectDests(),
Args, OpB, CBI->getName(), InsertPt);
NewCBI->setCallingConv(CBI->getCallingConv());
NewCBI->SubclassOptionalData = CBI->SubclassOptionalData;
NewCBI->setAttributes(CBI->getAttributes());
NewCBI->setDebugLoc(CBI->getDebugLoc());
NewCBI->NumIndirectDests = CBI->NumIndirectDests;
return NewCBI;
}
//===----------------------------------------------------------------------===//
// ReturnInst Implementation
//===----------------------------------------------------------------------===//
ReturnInst::ReturnInst(const ReturnInst &RI)
: Instruction(Type::getVoidTy(RI.getContext()), Instruction::Ret,
OperandTraits<ReturnInst>::op_end(this) - RI.getNumOperands(),
RI.getNumOperands()) {
if (RI.getNumOperands())
Op<0>() = RI.Op<0>();
SubclassOptionalData = RI.SubclassOptionalData;
}
ReturnInst::ReturnInst(LLVMContext &C, Value *retVal, Instruction *InsertBefore)
: Instruction(Type::getVoidTy(C), Instruction::Ret,
OperandTraits<ReturnInst>::op_end(this) - !!retVal, !!retVal,
InsertBefore) {
if (retVal)
Op<0>() = retVal;
}
ReturnInst::ReturnInst(LLVMContext &C, Value *retVal, BasicBlock *InsertAtEnd)
: Instruction(Type::getVoidTy(C), Instruction::Ret,
OperandTraits<ReturnInst>::op_end(this) - !!retVal, !!retVal,
InsertAtEnd) {
if (retVal)
Op<0>() = retVal;
}
ReturnInst::ReturnInst(LLVMContext &Context, BasicBlock *InsertAtEnd)
: Instruction(Type::getVoidTy(Context), Instruction::Ret,
OperandTraits<ReturnInst>::op_end(this), 0, InsertAtEnd) {}
//===----------------------------------------------------------------------===//
// ResumeInst Implementation
//===----------------------------------------------------------------------===//
ResumeInst::ResumeInst(const ResumeInst &RI)
: Instruction(Type::getVoidTy(RI.getContext()), Instruction::Resume,
OperandTraits<ResumeInst>::op_begin(this), 1) {
Op<0>() = RI.Op<0>();
}
ResumeInst::ResumeInst(Value *Exn, Instruction *InsertBefore)
: Instruction(Type::getVoidTy(Exn->getContext()), Instruction::Resume,
OperandTraits<ResumeInst>::op_begin(this), 1, InsertBefore) {
Op<0>() = Exn;
}
ResumeInst::ResumeInst(Value *Exn, BasicBlock *InsertAtEnd)
: Instruction(Type::getVoidTy(Exn->getContext()), Instruction::Resume,
OperandTraits<ResumeInst>::op_begin(this), 1, InsertAtEnd) {
Op<0>() = Exn;
}
//===----------------------------------------------------------------------===//
// CleanupReturnInst Implementation
//===----------------------------------------------------------------------===//
CleanupReturnInst::CleanupReturnInst(const CleanupReturnInst &CRI)
: Instruction(CRI.getType(), Instruction::CleanupRet,
OperandTraits<CleanupReturnInst>::op_end(this) -
CRI.getNumOperands(),
CRI.getNumOperands()) {
setInstructionSubclassData(CRI.getSubclassDataFromInstruction());
Op<0>() = CRI.Op<0>();
if (CRI.hasUnwindDest())
Op<1>() = CRI.Op<1>();
}
void CleanupReturnInst::init(Value *CleanupPad, BasicBlock *UnwindBB) {
if (UnwindBB)
setInstructionSubclassData(getSubclassDataFromInstruction() | 1);
Op<0>() = CleanupPad;
if (UnwindBB)
Op<1>() = UnwindBB;
}
CleanupReturnInst::CleanupReturnInst(Value *CleanupPad, BasicBlock *UnwindBB,
unsigned Values, Instruction *InsertBefore)
: Instruction(Type::getVoidTy(CleanupPad->getContext()),
Instruction::CleanupRet,
OperandTraits<CleanupReturnInst>::op_end(this) - Values,
Values, InsertBefore) {
init(CleanupPad, UnwindBB);
}
CleanupReturnInst::CleanupReturnInst(Value *CleanupPad, BasicBlock *UnwindBB,
unsigned Values, BasicBlock *InsertAtEnd)
: Instruction(Type::getVoidTy(CleanupPad->getContext()),
Instruction::CleanupRet,
OperandTraits<CleanupReturnInst>::op_end(this) - Values,
Values, InsertAtEnd) {
init(CleanupPad, UnwindBB);
}
//===----------------------------------------------------------------------===//
// CatchReturnInst Implementation
//===----------------------------------------------------------------------===//
void CatchReturnInst::init(Value *CatchPad, BasicBlock *BB) {
Op<0>() = CatchPad;
Op<1>() = BB;
}
CatchReturnInst::CatchReturnInst(const CatchReturnInst &CRI)
: Instruction(Type::getVoidTy(CRI.getContext()), Instruction::CatchRet,
OperandTraits<CatchReturnInst>::op_begin(this), 2) {
Op<0>() = CRI.Op<0>();
Op<1>() = CRI.Op<1>();
}
CatchReturnInst::CatchReturnInst(Value *CatchPad, BasicBlock *BB,
Instruction *InsertBefore)
: Instruction(Type::getVoidTy(BB->getContext()), Instruction::CatchRet,
OperandTraits<CatchReturnInst>::op_begin(this), 2,
InsertBefore) {
init(CatchPad, BB);
}
CatchReturnInst::CatchReturnInst(Value *CatchPad, BasicBlock *BB,
BasicBlock *InsertAtEnd)
: Instruction(Type::getVoidTy(BB->getContext()), Instruction::CatchRet,
OperandTraits<CatchReturnInst>::op_begin(this), 2,
InsertAtEnd) {
init(CatchPad, BB);
}
//===----------------------------------------------------------------------===//
// CatchSwitchInst Implementation
//===----------------------------------------------------------------------===//
CatchSwitchInst::CatchSwitchInst(Value *ParentPad, BasicBlock *UnwindDest,
unsigned NumReservedValues,
const Twine &NameStr,
Instruction *InsertBefore)
: Instruction(ParentPad->getType(), Instruction::CatchSwitch, nullptr, 0,
InsertBefore) {
if (UnwindDest)
++NumReservedValues;
init(ParentPad, UnwindDest, NumReservedValues + 1);
setName(NameStr);
}
CatchSwitchInst::CatchSwitchInst(Value *ParentPad, BasicBlock *UnwindDest,
unsigned NumReservedValues,
const Twine &NameStr, BasicBlock *InsertAtEnd)
: Instruction(ParentPad->getType(), Instruction::CatchSwitch, nullptr, 0,
InsertAtEnd) {
if (UnwindDest)
++NumReservedValues;
init(ParentPad, UnwindDest, NumReservedValues + 1);
setName(NameStr);