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llvm-6502/lib/VMCore/Instructions.cpp
Chris Lattner 79bc332ddb add a helper method 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30452 91177308-0d34-0410-b5e6-96231b3b80d8
2006-09-18 04:54:57 +00:00

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//===-- Instructions.cpp - Implement the LLVM instructions ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements all of the non-inline methods for the LLVM instruction
// classes.
//
//===----------------------------------------------------------------------===//
#include "llvm/BasicBlock.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/Support/CallSite.h"
using namespace llvm;
unsigned CallSite::getCallingConv() const {
if (CallInst *CI = dyn_cast<CallInst>(I))
return CI->getCallingConv();
else
return cast<InvokeInst>(I)->getCallingConv();
}
void CallSite::setCallingConv(unsigned CC) {
if (CallInst *CI = dyn_cast<CallInst>(I))
CI->setCallingConv(CC);
else
cast<InvokeInst>(I)->setCallingConv(CC);
}
//===----------------------------------------------------------------------===//
// TerminatorInst Class
//===----------------------------------------------------------------------===//
TerminatorInst::TerminatorInst(Instruction::TermOps iType,
Use *Ops, unsigned NumOps, Instruction *IB)
: Instruction(Type::VoidTy, iType, Ops, NumOps, "", IB) {
}
TerminatorInst::TerminatorInst(Instruction::TermOps iType,
Use *Ops, unsigned NumOps, BasicBlock *IAE)
: Instruction(Type::VoidTy, iType, Ops, NumOps, "", IAE) {
}
// Out of line virtual method, so the vtable, etc has a home.
TerminatorInst::~TerminatorInst() {
}
// Out of line virtual method, so the vtable, etc has a home.
UnaryInstruction::~UnaryInstruction() {
}
//===----------------------------------------------------------------------===//
// PHINode Class
//===----------------------------------------------------------------------===//
PHINode::PHINode(const PHINode &PN)
: Instruction(PN.getType(), Instruction::PHI,
new Use[PN.getNumOperands()], PN.getNumOperands()),
ReservedSpace(PN.getNumOperands()) {
Use *OL = OperandList;
for (unsigned i = 0, e = PN.getNumOperands(); i != e; i+=2) {
OL[i].init(PN.getOperand(i), this);
OL[i+1].init(PN.getOperand(i+1), this);
}
}
PHINode::~PHINode() {
delete [] OperandList;
}
// removeIncomingValue - Remove an incoming value. This is useful if a
// predecessor basic block is deleted.
Value *PHINode::removeIncomingValue(unsigned Idx, bool DeletePHIIfEmpty) {
unsigned NumOps = getNumOperands();
Use *OL = OperandList;
assert(Idx*2 < NumOps && "BB not in PHI node!");
Value *Removed = OL[Idx*2];
// Move everything after this operand down.
//
// FIXME: we could just swap with the end of the list, then erase. However,
// client might not expect this to happen. The code as it is thrashes the
// use/def lists, which is kinda lame.
for (unsigned i = (Idx+1)*2; i != NumOps; i += 2) {
OL[i-2] = OL[i];
OL[i-2+1] = OL[i+1];
}
// Nuke the last value.
OL[NumOps-2].set(0);
OL[NumOps-2+1].set(0);
NumOperands = NumOps-2;
// If the PHI node is dead, because it has zero entries, nuke it now.
if (NumOps == 2 && DeletePHIIfEmpty) {
// If anyone is using this PHI, make them use a dummy value instead...
replaceAllUsesWith(UndefValue::get(getType()));
eraseFromParent();
}
return Removed;
}
/// resizeOperands - resize operands - This adjusts the length of the operands
/// list according to the following behavior:
/// 1. If NumOps == 0, grow the operand list in response to a push_back style
/// of operation. This grows the number of ops by 1.5 times.
/// 2. If NumOps > NumOperands, reserve space for NumOps operands.
/// 3. If NumOps == NumOperands, trim the reserved space.
///
void PHINode::resizeOperands(unsigned NumOps) {
if (NumOps == 0) {
NumOps = (getNumOperands())*3/2;
if (NumOps < 4) NumOps = 4; // 4 op PHI nodes are VERY common.
} else if (NumOps*2 > NumOperands) {
// No resize needed.
if (ReservedSpace >= NumOps) return;
} else if (NumOps == NumOperands) {
if (ReservedSpace == NumOps) return;
} else {
return;
}
ReservedSpace = NumOps;
Use *NewOps = new Use[NumOps];
Use *OldOps = OperandList;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
NewOps[i].init(OldOps[i], this);
OldOps[i].set(0);
}
delete [] OldOps;
OperandList = NewOps;
}
/// hasConstantValue - If the specified PHI node always merges together the same
/// value, return the value, otherwise return null.
///
Value *PHINode::hasConstantValue(bool AllowNonDominatingInstruction) const {
// If the PHI node only has one incoming value, eliminate the PHI node...
if (getNumIncomingValues() == 1)
if (getIncomingValue(0) != this) // not X = phi X
return getIncomingValue(0);
else
return UndefValue::get(getType()); // Self cycle is dead.
// Otherwise if all of the incoming values are the same for the PHI, replace
// the PHI node with the incoming value.
//
Value *InVal = 0;
bool HasUndefInput = false;
for (unsigned i = 0, e = getNumIncomingValues(); i != e; ++i)
if (isa<UndefValue>(getIncomingValue(i)))
HasUndefInput = true;
else if (getIncomingValue(i) != this) // Not the PHI node itself...
if (InVal && getIncomingValue(i) != InVal)
return 0; // Not the same, bail out.
else
InVal = getIncomingValue(i);
// The only case that could cause InVal to be null is if we have a PHI node
// that only has entries for itself. In this case, there is no entry into the
// loop, so kill the PHI.
//
if (InVal == 0) InVal = UndefValue::get(getType());
// If we have a PHI node like phi(X, undef, X), where X is defined by some
// instruction, we cannot always return X as the result of the PHI node. Only
// do this if X is not an instruction (thus it must dominate the PHI block),
// or if the client is prepared to deal with this possibility.
if (HasUndefInput && !AllowNonDominatingInstruction)
if (Instruction *IV = dyn_cast<Instruction>(InVal))
// If it's in the entry block, it dominates everything.
if (IV->getParent() != &IV->getParent()->getParent()->front() ||
isa<InvokeInst>(IV))
return 0; // Cannot guarantee that InVal dominates this PHINode.
// All of the incoming values are the same, return the value now.
return InVal;
}
//===----------------------------------------------------------------------===//
// CallInst Implementation
//===----------------------------------------------------------------------===//
CallInst::~CallInst() {
delete [] OperandList;
}
void CallInst::init(Value *Func, const std::vector<Value*> &Params) {
NumOperands = Params.size()+1;
Use *OL = OperandList = new Use[Params.size()+1];
OL[0].init(Func, this);
const FunctionType *FTy =
cast<FunctionType>(cast<PointerType>(Func->getType())->getElementType());
assert((Params.size() == FTy->getNumParams() ||
(FTy->isVarArg() && Params.size() > FTy->getNumParams())) &&
"Calling a function with bad signature!");
for (unsigned i = 0, e = Params.size(); i != e; ++i) {
assert((i >= FTy->getNumParams() ||
FTy->getParamType(i) == Params[i]->getType()) &&
"Calling a function with a bad signature!");
OL[i+1].init(Params[i], this);
}
}
void CallInst::init(Value *Func, Value *Actual1, Value *Actual2) {
NumOperands = 3;
Use *OL = OperandList = new Use[3];
OL[0].init(Func, this);
OL[1].init(Actual1, this);
OL[2].init(Actual2, this);
const FunctionType *FTy =
cast<FunctionType>(cast<PointerType>(Func->getType())->getElementType());
assert((FTy->getNumParams() == 2 ||
(FTy->isVarArg() && FTy->getNumParams() < 2)) &&
"Calling a function with bad signature");
assert((0 >= FTy->getNumParams() ||
FTy->getParamType(0) == Actual1->getType()) &&
"Calling a function with a bad signature!");
assert((1 >= FTy->getNumParams() ||
FTy->getParamType(1) == Actual2->getType()) &&
"Calling a function with a bad signature!");
}
void CallInst::init(Value *Func, Value *Actual) {
NumOperands = 2;
Use *OL = OperandList = new Use[2];
OL[0].init(Func, this);
OL[1].init(Actual, this);
const FunctionType *FTy =
cast<FunctionType>(cast<PointerType>(Func->getType())->getElementType());
assert((FTy->getNumParams() == 1 ||
(FTy->isVarArg() && FTy->getNumParams() == 0)) &&
"Calling a function with bad signature");
assert((0 == FTy->getNumParams() ||
FTy->getParamType(0) == Actual->getType()) &&
"Calling a function with a bad signature!");
}
void CallInst::init(Value *Func) {
NumOperands = 1;
Use *OL = OperandList = new Use[1];
OL[0].init(Func, this);
const FunctionType *MTy =
cast<FunctionType>(cast<PointerType>(Func->getType())->getElementType());
assert(MTy->getNumParams() == 0 && "Calling a function with bad signature");
}
CallInst::CallInst(Value *Func, const std::vector<Value*> &Params,
const std::string &Name, Instruction *InsertBefore)
: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
->getElementType())->getReturnType(),
Instruction::Call, 0, 0, Name, InsertBefore) {
init(Func, Params);
}
CallInst::CallInst(Value *Func, const std::vector<Value*> &Params,
const std::string &Name, BasicBlock *InsertAtEnd)
: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
->getElementType())->getReturnType(),
Instruction::Call, 0, 0, Name, InsertAtEnd) {
init(Func, Params);
}
CallInst::CallInst(Value *Func, Value *Actual1, Value *Actual2,
const std::string &Name, Instruction *InsertBefore)
: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
->getElementType())->getReturnType(),
Instruction::Call, 0, 0, Name, InsertBefore) {
init(Func, Actual1, Actual2);
}
CallInst::CallInst(Value *Func, Value *Actual1, Value *Actual2,
const std::string &Name, BasicBlock *InsertAtEnd)
: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
->getElementType())->getReturnType(),
Instruction::Call, 0, 0, Name, InsertAtEnd) {
init(Func, Actual1, Actual2);
}
CallInst::CallInst(Value *Func, Value* Actual, const std::string &Name,
Instruction *InsertBefore)
: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
->getElementType())->getReturnType(),
Instruction::Call, 0, 0, Name, InsertBefore) {
init(Func, Actual);
}
CallInst::CallInst(Value *Func, Value* Actual, const std::string &Name,
BasicBlock *InsertAtEnd)
: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
->getElementType())->getReturnType(),
Instruction::Call, 0, 0, Name, InsertAtEnd) {
init(Func, Actual);
}
CallInst::CallInst(Value *Func, const std::string &Name,
Instruction *InsertBefore)
: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
->getElementType())->getReturnType(),
Instruction::Call, 0, 0, Name, InsertBefore) {
init(Func);
}
CallInst::CallInst(Value *Func, const std::string &Name,
BasicBlock *InsertAtEnd)
: Instruction(cast<FunctionType>(cast<PointerType>(Func->getType())
->getElementType())->getReturnType(),
Instruction::Call, 0, 0, Name, InsertAtEnd) {
init(Func);
}
CallInst::CallInst(const CallInst &CI)
: Instruction(CI.getType(), Instruction::Call, new Use[CI.getNumOperands()],
CI.getNumOperands()) {
SubclassData = CI.SubclassData;
Use *OL = OperandList;
Use *InOL = CI.OperandList;
for (unsigned i = 0, e = CI.getNumOperands(); i != e; ++i)
OL[i].init(InOL[i], this);
}
//===----------------------------------------------------------------------===//
// InvokeInst Implementation
//===----------------------------------------------------------------------===//
InvokeInst::~InvokeInst() {
delete [] OperandList;
}
void InvokeInst::init(Value *Fn, BasicBlock *IfNormal, BasicBlock *IfException,
const std::vector<Value*> &Params) {
NumOperands = 3+Params.size();
Use *OL = OperandList = new Use[3+Params.size()];
OL[0].init(Fn, this);
OL[1].init(IfNormal, this);
OL[2].init(IfException, this);
const FunctionType *FTy =
cast<FunctionType>(cast<PointerType>(Fn->getType())->getElementType());
assert((Params.size() == FTy->getNumParams()) ||
(FTy->isVarArg() && Params.size() > FTy->getNumParams()) &&
"Calling a function with bad signature");
for (unsigned i = 0, e = Params.size(); i != e; i++) {
assert((i >= FTy->getNumParams() ||
FTy->getParamType(i) == Params[i]->getType()) &&
"Invoking a function with a bad signature!");
OL[i+3].init(Params[i], this);
}
}
InvokeInst::InvokeInst(Value *Fn, BasicBlock *IfNormal,
BasicBlock *IfException,
const std::vector<Value*> &Params,
const std::string &Name, Instruction *InsertBefore)
: TerminatorInst(cast<FunctionType>(cast<PointerType>(Fn->getType())
->getElementType())->getReturnType(),
Instruction::Invoke, 0, 0, Name, InsertBefore) {
init(Fn, IfNormal, IfException, Params);
}
InvokeInst::InvokeInst(Value *Fn, BasicBlock *IfNormal,
BasicBlock *IfException,
const std::vector<Value*> &Params,
const std::string &Name, BasicBlock *InsertAtEnd)
: TerminatorInst(cast<FunctionType>(cast<PointerType>(Fn->getType())
->getElementType())->getReturnType(),
Instruction::Invoke, 0, 0, Name, InsertAtEnd) {
init(Fn, IfNormal, IfException, Params);
}
InvokeInst::InvokeInst(const InvokeInst &II)
: TerminatorInst(II.getType(), Instruction::Invoke,
new Use[II.getNumOperands()], II.getNumOperands()) {
SubclassData = II.SubclassData;
Use *OL = OperandList, *InOL = II.OperandList;
for (unsigned i = 0, e = II.getNumOperands(); i != e; ++i)
OL[i].init(InOL[i], this);
}
BasicBlock *InvokeInst::getSuccessorV(unsigned idx) const {
return getSuccessor(idx);
}
unsigned InvokeInst::getNumSuccessorsV() const {
return getNumSuccessors();
}
void InvokeInst::setSuccessorV(unsigned idx, BasicBlock *B) {
return setSuccessor(idx, B);
}
//===----------------------------------------------------------------------===//
// ReturnInst Implementation
//===----------------------------------------------------------------------===//
void ReturnInst::init(Value *retVal) {
if (retVal && retVal->getType() != Type::VoidTy) {
assert(!isa<BasicBlock>(retVal) &&
"Cannot return basic block. Probably using the incorrect ctor");
NumOperands = 1;
RetVal.init(retVal, this);
}
}
unsigned ReturnInst::getNumSuccessorsV() const {
return getNumSuccessors();
}
// Out-of-line ReturnInst method, put here so the C++ compiler can choose to
// emit the vtable for the class in this translation unit.
void ReturnInst::setSuccessorV(unsigned idx, BasicBlock *NewSucc) {
assert(0 && "ReturnInst has no successors!");
}
BasicBlock *ReturnInst::getSuccessorV(unsigned idx) const {
assert(0 && "ReturnInst has no successors!");
abort();
return 0;
}
//===----------------------------------------------------------------------===//
// UnwindInst Implementation
//===----------------------------------------------------------------------===//
unsigned UnwindInst::getNumSuccessorsV() const {
return getNumSuccessors();
}
void UnwindInst::setSuccessorV(unsigned idx, BasicBlock *NewSucc) {
assert(0 && "UnwindInst has no successors!");
}
BasicBlock *UnwindInst::getSuccessorV(unsigned idx) const {
assert(0 && "UnwindInst has no successors!");
abort();
return 0;
}
//===----------------------------------------------------------------------===//
// UnreachableInst Implementation
//===----------------------------------------------------------------------===//
unsigned UnreachableInst::getNumSuccessorsV() const {
return getNumSuccessors();
}
void UnreachableInst::setSuccessorV(unsigned idx, BasicBlock *NewSucc) {
assert(0 && "UnwindInst has no successors!");
}
BasicBlock *UnreachableInst::getSuccessorV(unsigned idx) const {
assert(0 && "UnwindInst has no successors!");
abort();
return 0;
}
//===----------------------------------------------------------------------===//
// BranchInst Implementation
//===----------------------------------------------------------------------===//
void BranchInst::AssertOK() {
if (isConditional())
assert(getCondition()->getType() == Type::BoolTy &&
"May only branch on boolean predicates!");
}
BranchInst::BranchInst(const BranchInst &BI) :
TerminatorInst(Instruction::Br, Ops, BI.getNumOperands()) {
OperandList[0].init(BI.getOperand(0), this);
if (BI.getNumOperands() != 1) {
assert(BI.getNumOperands() == 3 && "BR can have 1 or 3 operands!");
OperandList[1].init(BI.getOperand(1), this);
OperandList[2].init(BI.getOperand(2), this);
}
}
BasicBlock *BranchInst::getSuccessorV(unsigned idx) const {
return getSuccessor(idx);
}
unsigned BranchInst::getNumSuccessorsV() const {
return getNumSuccessors();
}
void BranchInst::setSuccessorV(unsigned idx, BasicBlock *B) {
setSuccessor(idx, B);
}
//===----------------------------------------------------------------------===//
// AllocationInst Implementation
//===----------------------------------------------------------------------===//
static Value *getAISize(Value *Amt) {
if (!Amt)
Amt = ConstantUInt::get(Type::UIntTy, 1);
else {
assert(!isa<BasicBlock>(Amt) &&
"Passed basic block into allocation size parameter! Ue other ctor");
assert(Amt->getType() == Type::UIntTy &&
"Malloc/Allocation array size != UIntTy!");
}
return Amt;
}
AllocationInst::AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy,
unsigned Align, const std::string &Name,
Instruction *InsertBefore)
: UnaryInstruction(PointerType::get(Ty), iTy, getAISize(ArraySize),
Name, InsertBefore), Alignment(Align) {
assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
assert(Ty != Type::VoidTy && "Cannot allocate void!");
}
AllocationInst::AllocationInst(const Type *Ty, Value *ArraySize, unsigned iTy,
unsigned Align, const std::string &Name,
BasicBlock *InsertAtEnd)
: UnaryInstruction(PointerType::get(Ty), iTy, getAISize(ArraySize),
Name, InsertAtEnd), Alignment(Align) {
assert((Align & (Align-1)) == 0 && "Alignment is not a power of 2!");
assert(Ty != Type::VoidTy && "Cannot allocate void!");
}
// Out of line virtual method, so the vtable, etc has a home.
AllocationInst::~AllocationInst() {
}
bool AllocationInst::isArrayAllocation() const {
if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(getOperand(0)))
return CUI->getValue() != 1;
return true;
}
const Type *AllocationInst::getAllocatedType() const {
return getType()->getElementType();
}
AllocaInst::AllocaInst(const AllocaInst &AI)
: AllocationInst(AI.getType()->getElementType(), (Value*)AI.getOperand(0),
Instruction::Alloca, AI.getAlignment()) {
}
MallocInst::MallocInst(const MallocInst &MI)
: AllocationInst(MI.getType()->getElementType(), (Value*)MI.getOperand(0),
Instruction::Malloc, MI.getAlignment()) {
}
//===----------------------------------------------------------------------===//
// FreeInst Implementation
//===----------------------------------------------------------------------===//
void FreeInst::AssertOK() {
assert(isa<PointerType>(getOperand(0)->getType()) &&
"Can not free something of nonpointer type!");
}
FreeInst::FreeInst(Value *Ptr, Instruction *InsertBefore)
: UnaryInstruction(Type::VoidTy, Free, Ptr, "", InsertBefore) {
AssertOK();
}
FreeInst::FreeInst(Value *Ptr, BasicBlock *InsertAtEnd)
: UnaryInstruction(Type::VoidTy, Free, Ptr, "", InsertAtEnd) {
AssertOK();
}
//===----------------------------------------------------------------------===//
// LoadInst Implementation
//===----------------------------------------------------------------------===//
void LoadInst::AssertOK() {
assert(isa<PointerType>(getOperand(0)->getType()) &&
"Ptr must have pointer type.");
}
LoadInst::LoadInst(Value *Ptr, const std::string &Name, Instruction *InsertBef)
: UnaryInstruction(cast<PointerType>(Ptr->getType())->getElementType(),
Load, Ptr, Name, InsertBef) {
setVolatile(false);
AssertOK();
}
LoadInst::LoadInst(Value *Ptr, const std::string &Name, BasicBlock *InsertAE)
: UnaryInstruction(cast<PointerType>(Ptr->getType())->getElementType(),
Load, Ptr, Name, InsertAE) {
setVolatile(false);
AssertOK();
}
LoadInst::LoadInst(Value *Ptr, const std::string &Name, bool isVolatile,
Instruction *InsertBef)
: UnaryInstruction(cast<PointerType>(Ptr->getType())->getElementType(),
Load, Ptr, Name, InsertBef) {
setVolatile(isVolatile);
AssertOK();
}
LoadInst::LoadInst(Value *Ptr, const std::string &Name, bool isVolatile,
BasicBlock *InsertAE)
: UnaryInstruction(cast<PointerType>(Ptr->getType())->getElementType(),
Load, Ptr, Name, InsertAE) {
setVolatile(isVolatile);
AssertOK();
}
//===----------------------------------------------------------------------===//
// StoreInst Implementation
//===----------------------------------------------------------------------===//
void StoreInst::AssertOK() {
assert(isa<PointerType>(getOperand(1)->getType()) &&
"Ptr must have pointer type!");
assert(getOperand(0)->getType() ==
cast<PointerType>(getOperand(1)->getType())->getElementType()
&& "Ptr must be a pointer to Val type!");
}
StoreInst::StoreInst(Value *val, Value *addr, Instruction *InsertBefore)
: Instruction(Type::VoidTy, Store, Ops, 2, "", InsertBefore) {
Ops[0].init(val, this);
Ops[1].init(addr, this);
setVolatile(false);
AssertOK();
}
StoreInst::StoreInst(Value *val, Value *addr, BasicBlock *InsertAtEnd)
: Instruction(Type::VoidTy, Store, Ops, 2, "", InsertAtEnd) {
Ops[0].init(val, this);
Ops[1].init(addr, this);
setVolatile(false);
AssertOK();
}
StoreInst::StoreInst(Value *val, Value *addr, bool isVolatile,
Instruction *InsertBefore)
: Instruction(Type::VoidTy, Store, Ops, 2, "", InsertBefore) {
Ops[0].init(val, this);
Ops[1].init(addr, this);
setVolatile(isVolatile);
AssertOK();
}
StoreInst::StoreInst(Value *val, Value *addr, bool isVolatile,
BasicBlock *InsertAtEnd)
: Instruction(Type::VoidTy, Store, Ops, 2, "", InsertAtEnd) {
Ops[0].init(val, this);
Ops[1].init(addr, this);
setVolatile(isVolatile);
AssertOK();
}
//===----------------------------------------------------------------------===//
// GetElementPtrInst Implementation
//===----------------------------------------------------------------------===//
// checkType - Simple wrapper function to give a better assertion failure
// message on bad indexes for a gep instruction.
//
static inline const Type *checkType(const Type *Ty) {
assert(Ty && "Invalid GetElementPtrInst indices for type!");
return Ty;
}
void GetElementPtrInst::init(Value *Ptr, const std::vector<Value*> &Idx) {
NumOperands = 1+Idx.size();
Use *OL = OperandList = new Use[NumOperands];
OL[0].init(Ptr, this);
for (unsigned i = 0, e = Idx.size(); i != e; ++i)
OL[i+1].init(Idx[i], this);
}
void GetElementPtrInst::init(Value *Ptr, Value *Idx0, Value *Idx1) {
NumOperands = 3;
Use *OL = OperandList = new Use[3];
OL[0].init(Ptr, this);
OL[1].init(Idx0, this);
OL[2].init(Idx1, this);
}
void GetElementPtrInst::init(Value *Ptr, Value *Idx) {
NumOperands = 2;
Use *OL = OperandList = new Use[2];
OL[0].init(Ptr, this);
OL[1].init(Idx, this);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
const std::string &Name, Instruction *InBe)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
Idx, true))),
GetElementPtr, 0, 0, Name, InBe) {
init(Ptr, Idx);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
const std::string &Name, BasicBlock *IAE)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
Idx, true))),
GetElementPtr, 0, 0, Name, IAE) {
init(Ptr, Idx);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx,
const std::string &Name, Instruction *InBe)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),Idx))),
GetElementPtr, 0, 0, Name, InBe) {
init(Ptr, Idx);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx,
const std::string &Name, BasicBlock *IAE)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),Idx))),
GetElementPtr, 0, 0, Name, IAE) {
init(Ptr, Idx);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
const std::string &Name, Instruction *InBe)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
Idx0, Idx1, true))),
GetElementPtr, 0, 0, Name, InBe) {
init(Ptr, Idx0, Idx1);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
const std::string &Name, BasicBlock *IAE)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
Idx0, Idx1, true))),
GetElementPtr, 0, 0, Name, IAE) {
init(Ptr, Idx0, Idx1);
}
GetElementPtrInst::~GetElementPtrInst() {
delete[] OperandList;
}
// getIndexedType - Returns the type of the element that would be loaded with
// a load instruction with the specified parameters.
//
// A null type is returned if the indices are invalid for the specified
// pointer type.
//
const Type* GetElementPtrInst::getIndexedType(const Type *Ptr,
const std::vector<Value*> &Idx,
bool AllowCompositeLeaf) {
if (!isa<PointerType>(Ptr)) return 0; // Type isn't a pointer type!
// Handle the special case of the empty set index set...
if (Idx.empty())
if (AllowCompositeLeaf ||
cast<PointerType>(Ptr)->getElementType()->isFirstClassType())
return cast<PointerType>(Ptr)->getElementType();
else
return 0;
unsigned CurIdx = 0;
while (const CompositeType *CT = dyn_cast<CompositeType>(Ptr)) {
if (Idx.size() == CurIdx) {
if (AllowCompositeLeaf || CT->isFirstClassType()) return Ptr;
return 0; // Can't load a whole structure or array!?!?
}
Value *Index = Idx[CurIdx++];
if (isa<PointerType>(CT) && CurIdx != 1)
return 0; // Can only index into pointer types at the first index!
if (!CT->indexValid(Index)) return 0;
Ptr = CT->getTypeAtIndex(Index);
// If the new type forwards to another type, then it is in the middle
// of being refined to another type (and hence, may have dropped all
// references to what it was using before). So, use the new forwarded
// type.
if (const Type * Ty = Ptr->getForwardedType()) {
Ptr = Ty;
}
}
return CurIdx == Idx.size() ? Ptr : 0;
}
const Type* GetElementPtrInst::getIndexedType(const Type *Ptr,
Value *Idx0, Value *Idx1,
bool AllowCompositeLeaf) {
const PointerType *PTy = dyn_cast<PointerType>(Ptr);
if (!PTy) return 0; // Type isn't a pointer type!
// Check the pointer index.
if (!PTy->indexValid(Idx0)) return 0;
const CompositeType *CT = dyn_cast<CompositeType>(PTy->getElementType());
if (!CT || !CT->indexValid(Idx1)) return 0;
const Type *ElTy = CT->getTypeAtIndex(Idx1);
if (AllowCompositeLeaf || ElTy->isFirstClassType())
return ElTy;
return 0;
}
const Type* GetElementPtrInst::getIndexedType(const Type *Ptr, Value *Idx) {
const PointerType *PTy = dyn_cast<PointerType>(Ptr);
if (!PTy) return 0; // Type isn't a pointer type!
// Check the pointer index.
if (!PTy->indexValid(Idx)) return 0;
return PTy->getElementType();
}
//===----------------------------------------------------------------------===//
// ExtractElementInst Implementation
//===----------------------------------------------------------------------===//
ExtractElementInst::ExtractElementInst(Value *Val, Value *Index,
const std::string &Name,
Instruction *InsertBef)
: Instruction(cast<PackedType>(Val->getType())->getElementType(),
ExtractElement, Ops, 2, Name, InsertBef) {
assert(isValidOperands(Val, Index) &&
"Invalid extractelement instruction operands!");
Ops[0].init(Val, this);
Ops[1].init(Index, this);
}
ExtractElementInst::ExtractElementInst(Value *Val, Value *Index,
const std::string &Name,
BasicBlock *InsertAE)
: Instruction(cast<PackedType>(Val->getType())->getElementType(),
ExtractElement, Ops, 2, Name, InsertAE) {
assert(isValidOperands(Val, Index) &&
"Invalid extractelement instruction operands!");
Ops[0].init(Val, this);
Ops[1].init(Index, this);
}
bool ExtractElementInst::isValidOperands(const Value *Val, const Value *Index) {
if (!isa<PackedType>(Val->getType()) || Index->getType() != Type::UIntTy)
return false;
return true;
}
//===----------------------------------------------------------------------===//
// InsertElementInst Implementation
//===----------------------------------------------------------------------===//
InsertElementInst::InsertElementInst(const InsertElementInst &IE)
: Instruction(IE.getType(), InsertElement, Ops, 3) {
Ops[0].init(IE.Ops[0], this);
Ops[1].init(IE.Ops[1], this);
Ops[2].init(IE.Ops[2], this);
}
InsertElementInst::InsertElementInst(Value *Vec, Value *Elt, Value *Index,
const std::string &Name,
Instruction *InsertBef)
: Instruction(Vec->getType(), InsertElement, Ops, 3, Name, InsertBef) {
assert(isValidOperands(Vec, Elt, Index) &&
"Invalid insertelement instruction operands!");
Ops[0].init(Vec, this);
Ops[1].init(Elt, this);
Ops[2].init(Index, this);
}
InsertElementInst::InsertElementInst(Value *Vec, Value *Elt, Value *Index,
const std::string &Name,
BasicBlock *InsertAE)
: Instruction(Vec->getType(), InsertElement, Ops, 3, Name, InsertAE) {
assert(isValidOperands(Vec, Elt, Index) &&
"Invalid insertelement instruction operands!");
Ops[0].init(Vec, this);
Ops[1].init(Elt, this);
Ops[2].init(Index, this);
}
bool InsertElementInst::isValidOperands(const Value *Vec, const Value *Elt,
const Value *Index) {
if (!isa<PackedType>(Vec->getType()))
return false; // First operand of insertelement must be packed type.
if (Elt->getType() != cast<PackedType>(Vec->getType())->getElementType())
return false;// Second operand of insertelement must be packed element type.
if (Index->getType() != Type::UIntTy)
return false; // Third operand of insertelement must be uint.
return true;
}
//===----------------------------------------------------------------------===//
// ShuffleVectorInst Implementation
//===----------------------------------------------------------------------===//
ShuffleVectorInst::ShuffleVectorInst(const ShuffleVectorInst &SV)
: Instruction(SV.getType(), ShuffleVector, Ops, 3) {
Ops[0].init(SV.Ops[0], this);
Ops[1].init(SV.Ops[1], this);
Ops[2].init(SV.Ops[2], this);
}
ShuffleVectorInst::ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
const std::string &Name,
Instruction *InsertBefore)
: Instruction(V1->getType(), ShuffleVector, Ops, 3, Name, InsertBefore) {
assert(isValidOperands(V1, V2, Mask) &&
"Invalid shuffle vector instruction operands!");
Ops[0].init(V1, this);
Ops[1].init(V2, this);
Ops[2].init(Mask, this);
}
ShuffleVectorInst::ShuffleVectorInst(Value *V1, Value *V2, Value *Mask,
const std::string &Name,
BasicBlock *InsertAtEnd)
: Instruction(V1->getType(), ShuffleVector, Ops, 3, Name, InsertAtEnd) {
assert(isValidOperands(V1, V2, Mask) &&
"Invalid shuffle vector instruction operands!");
Ops[0].init(V1, this);
Ops[1].init(V2, this);
Ops[2].init(Mask, this);
}
bool ShuffleVectorInst::isValidOperands(const Value *V1, const Value *V2,
const Value *Mask) {
if (!isa<PackedType>(V1->getType())) return false;
if (V1->getType() != V2->getType()) return false;
if (!isa<PackedType>(Mask->getType()) ||
cast<PackedType>(Mask->getType())->getElementType() != Type::UIntTy ||
cast<PackedType>(Mask->getType())->getNumElements() !=
cast<PackedType>(V1->getType())->getNumElements())
return false;
return true;
}
//===----------------------------------------------------------------------===//
// BinaryOperator Class
//===----------------------------------------------------------------------===//
void BinaryOperator::init(BinaryOps iType)
{
Value *LHS = getOperand(0), *RHS = getOperand(1);
assert(LHS->getType() == RHS->getType() &&
"Binary operator operand types must match!");
#ifndef NDEBUG
switch (iType) {
case Add: case Sub:
case Mul: case Div:
case Rem:
assert(getType() == LHS->getType() &&
"Arithmetic operation should return same type as operands!");
assert((getType()->isInteger() || getType()->isFloatingPoint() ||
isa<PackedType>(getType())) &&
"Tried to create an arithmetic operation on a non-arithmetic type!");
break;
case And: case Or:
case Xor:
assert(getType() == LHS->getType() &&
"Logical operation should return same type as operands!");
assert((getType()->isIntegral() ||
(isa<PackedType>(getType()) &&
cast<PackedType>(getType())->getElementType()->isIntegral())) &&
"Tried to create a logical operation on a non-integral type!");
break;
case SetLT: case SetGT: case SetLE:
case SetGE: case SetEQ: case SetNE:
assert(getType() == Type::BoolTy && "Setcc must return bool!");
default:
break;
}
#endif
}
BinaryOperator *BinaryOperator::create(BinaryOps Op, Value *S1, Value *S2,
const std::string &Name,
Instruction *InsertBefore) {
assert(S1->getType() == S2->getType() &&
"Cannot create binary operator with two operands of differing type!");
switch (Op) {
// Binary comparison operators...
case SetLT: case SetGT: case SetLE:
case SetGE: case SetEQ: case SetNE:
return new SetCondInst(Op, S1, S2, Name, InsertBefore);
default:
return new BinaryOperator(Op, S1, S2, S1->getType(), Name, InsertBefore);
}
}
BinaryOperator *BinaryOperator::create(BinaryOps Op, Value *S1, Value *S2,
const std::string &Name,
BasicBlock *InsertAtEnd) {
BinaryOperator *Res = create(Op, S1, S2, Name);
InsertAtEnd->getInstList().push_back(Res);
return Res;
}
BinaryOperator *BinaryOperator::createNeg(Value *Op, const std::string &Name,
Instruction *InsertBefore) {
if (!Op->getType()->isFloatingPoint())
return new BinaryOperator(Instruction::Sub,
Constant::getNullValue(Op->getType()), Op,
Op->getType(), Name, InsertBefore);
else
return new BinaryOperator(Instruction::Sub,
ConstantFP::get(Op->getType(), -0.0), Op,
Op->getType(), Name, InsertBefore);
}
BinaryOperator *BinaryOperator::createNeg(Value *Op, const std::string &Name,
BasicBlock *InsertAtEnd) {
if (!Op->getType()->isFloatingPoint())
return new BinaryOperator(Instruction::Sub,
Constant::getNullValue(Op->getType()), Op,
Op->getType(), Name, InsertAtEnd);
else
return new BinaryOperator(Instruction::Sub,
ConstantFP::get(Op->getType(), -0.0), Op,
Op->getType(), Name, InsertAtEnd);
}
BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name,
Instruction *InsertBefore) {
Constant *C;
if (const PackedType *PTy = dyn_cast<PackedType>(Op->getType())) {
C = ConstantIntegral::getAllOnesValue(PTy->getElementType());
C = ConstantPacked::get(std::vector<Constant*>(PTy->getNumElements(), C));
} else {
C = ConstantIntegral::getAllOnesValue(Op->getType());
}
return new BinaryOperator(Instruction::Xor, Op, C,
Op->getType(), Name, InsertBefore);
}
BinaryOperator *BinaryOperator::createNot(Value *Op, const std::string &Name,
BasicBlock *InsertAtEnd) {
Constant *AllOnes;
if (const PackedType *PTy = dyn_cast<PackedType>(Op->getType())) {
// Create a vector of all ones values.
Constant *Elt = ConstantIntegral::getAllOnesValue(PTy->getElementType());
AllOnes =
ConstantPacked::get(std::vector<Constant*>(PTy->getNumElements(), Elt));
} else {
AllOnes = ConstantIntegral::getAllOnesValue(Op->getType());
}
return new BinaryOperator(Instruction::Xor, Op, AllOnes,
Op->getType(), Name, InsertAtEnd);
}
// isConstantAllOnes - Helper function for several functions below
static inline bool isConstantAllOnes(const Value *V) {
return isa<ConstantIntegral>(V) &&cast<ConstantIntegral>(V)->isAllOnesValue();
}
bool BinaryOperator::isNeg(const Value *V) {
if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
if (Bop->getOpcode() == Instruction::Sub)
if (!V->getType()->isFloatingPoint())
return Bop->getOperand(0) == Constant::getNullValue(Bop->getType());
else
return Bop->getOperand(0) == ConstantFP::get(Bop->getType(), -0.0);
return false;
}
bool BinaryOperator::isNot(const Value *V) {
if (const BinaryOperator *Bop = dyn_cast<BinaryOperator>(V))
return (Bop->getOpcode() == Instruction::Xor &&
(isConstantAllOnes(Bop->getOperand(1)) ||
isConstantAllOnes(Bop->getOperand(0))));
return false;
}
Value *BinaryOperator::getNegArgument(Value *BinOp) {
assert(isNeg(BinOp) && "getNegArgument from non-'neg' instruction!");
return cast<BinaryOperator>(BinOp)->getOperand(1);
}
const Value *BinaryOperator::getNegArgument(const Value *BinOp) {
return getNegArgument(const_cast<Value*>(BinOp));
}
Value *BinaryOperator::getNotArgument(Value *BinOp) {
assert(isNot(BinOp) && "getNotArgument on non-'not' instruction!");
BinaryOperator *BO = cast<BinaryOperator>(BinOp);
Value *Op0 = BO->getOperand(0);
Value *Op1 = BO->getOperand(1);
if (isConstantAllOnes(Op0)) return Op1;
assert(isConstantAllOnes(Op1));
return Op0;
}
const Value *BinaryOperator::getNotArgument(const Value *BinOp) {
return getNotArgument(const_cast<Value*>(BinOp));
}
// swapOperands - Exchange the two operands to this instruction. This
// instruction is safe to use on any binary instruction and does not
// modify the semantics of the instruction. If the instruction is
// order dependent (SetLT f.e.) the opcode is changed.
//
bool BinaryOperator::swapOperands() {
if (isCommutative())
; // If the instruction is commutative, it is safe to swap the operands
else if (SetCondInst *SCI = dyn_cast<SetCondInst>(this))
/// FIXME: SetCC instructions shouldn't all have different opcodes.
setOpcode(SCI->getSwappedCondition());
else
return true; // Can't commute operands
std::swap(Ops[0], Ops[1]);
return false;
}
//===----------------------------------------------------------------------===//
// ShiftInst Class
//===----------------------------------------------------------------------===//
/// isLogicalShift - Return true if this is a logical shift left or a logical
/// shift right.
bool ShiftInst::isLogicalShift() const {
return getOpcode() == Instruction::Shl || getType()->isUnsigned();
}
//===----------------------------------------------------------------------===//
// CastInst Class
//===----------------------------------------------------------------------===//
/// isTruncIntCast - Return true if this is a truncating integer cast
/// instruction, e.g. a cast from long to uint.
bool CastInst::isTruncIntCast() const {
// The dest type has to be integral, the input has to be integer.
if (!getType()->isIntegral() || !getOperand(0)->getType()->isInteger())
return false;
// Has to be large to smaller.
return getOperand(0)->getType()->getPrimitiveSizeInBits() >
getType()->getPrimitiveSizeInBits();
}
//===----------------------------------------------------------------------===//
// SetCondInst Class
//===----------------------------------------------------------------------===//
SetCondInst::SetCondInst(BinaryOps Opcode, Value *S1, Value *S2,
const std::string &Name, Instruction *InsertBefore)
: BinaryOperator(Opcode, S1, S2, Type::BoolTy, Name, InsertBefore) {
// Make sure it's a valid type... getInverseCondition will assert out if not.
assert(getInverseCondition(Opcode));
}
SetCondInst::SetCondInst(BinaryOps Opcode, Value *S1, Value *S2,
const std::string &Name, BasicBlock *InsertAtEnd)
: BinaryOperator(Opcode, S1, S2, Type::BoolTy, Name, InsertAtEnd) {
// Make sure it's a valid type... getInverseCondition will assert out if not.
assert(getInverseCondition(Opcode));
}
// getInverseCondition - Return the inverse of the current condition opcode.
// For example seteq -> setne, setgt -> setle, setlt -> setge, etc...
//
Instruction::BinaryOps SetCondInst::getInverseCondition(BinaryOps Opcode) {
switch (Opcode) {
default:
assert(0 && "Unknown setcc opcode!");
case SetEQ: return SetNE;
case SetNE: return SetEQ;
case SetGT: return SetLE;
case SetLT: return SetGE;
case SetGE: return SetLT;
case SetLE: return SetGT;
}
}
// getSwappedCondition - Return the condition opcode that would be the result
// of exchanging the two operands of the setcc instruction without changing
// the result produced. Thus, seteq->seteq, setle->setge, setlt->setgt, etc.
//
Instruction::BinaryOps SetCondInst::getSwappedCondition(BinaryOps Opcode) {
switch (Opcode) {
default: assert(0 && "Unknown setcc instruction!");
case SetEQ: case SetNE: return Opcode;
case SetGT: return SetLT;
case SetLT: return SetGT;
case SetGE: return SetLE;
case SetLE: return SetGE;
}
}
//===----------------------------------------------------------------------===//
// SwitchInst Implementation
//===----------------------------------------------------------------------===//
void SwitchInst::init(Value *Value, BasicBlock *Default, unsigned NumCases) {
assert(Value && Default);
ReservedSpace = 2+NumCases*2;
NumOperands = 2;
OperandList = new Use[ReservedSpace];
OperandList[0].init(Value, this);
OperandList[1].init(Default, this);
}
SwitchInst::SwitchInst(const SwitchInst &SI)
: TerminatorInst(Instruction::Switch, new Use[SI.getNumOperands()],
SI.getNumOperands()) {
Use *OL = OperandList, *InOL = SI.OperandList;
for (unsigned i = 0, E = SI.getNumOperands(); i != E; i+=2) {
OL[i].init(InOL[i], this);
OL[i+1].init(InOL[i+1], this);
}
}
SwitchInst::~SwitchInst() {
delete [] OperandList;
}
/// addCase - Add an entry to the switch instruction...
///
void SwitchInst::addCase(ConstantInt *OnVal, BasicBlock *Dest) {
unsigned OpNo = NumOperands;
if (OpNo+2 > ReservedSpace)
resizeOperands(0); // Get more space!
// Initialize some new operands.
assert(OpNo+1 < ReservedSpace && "Growing didn't work!");
NumOperands = OpNo+2;
OperandList[OpNo].init(OnVal, this);
OperandList[OpNo+1].init(Dest, this);
}
/// removeCase - This method removes the specified successor from the switch
/// instruction. Note that this cannot be used to remove the default
/// destination (successor #0).
///
void SwitchInst::removeCase(unsigned idx) {
assert(idx != 0 && "Cannot remove the default case!");
assert(idx*2 < getNumOperands() && "Successor index out of range!!!");
unsigned NumOps = getNumOperands();
Use *OL = OperandList;
// Move everything after this operand down.
//
// FIXME: we could just swap with the end of the list, then erase. However,
// client might not expect this to happen. The code as it is thrashes the
// use/def lists, which is kinda lame.
for (unsigned i = (idx+1)*2; i != NumOps; i += 2) {
OL[i-2] = OL[i];
OL[i-2+1] = OL[i+1];
}
// Nuke the last value.
OL[NumOps-2].set(0);
OL[NumOps-2+1].set(0);
NumOperands = NumOps-2;
}
/// resizeOperands - resize operands - This adjusts the length of the operands
/// list according to the following behavior:
/// 1. If NumOps == 0, grow the operand list in response to a push_back style
/// of operation. This grows the number of ops by 1.5 times.
/// 2. If NumOps > NumOperands, reserve space for NumOps operands.
/// 3. If NumOps == NumOperands, trim the reserved space.
///
void SwitchInst::resizeOperands(unsigned NumOps) {
if (NumOps == 0) {
NumOps = getNumOperands()/2*6;
} else if (NumOps*2 > NumOperands) {
// No resize needed.
if (ReservedSpace >= NumOps) return;
} else if (NumOps == NumOperands) {
if (ReservedSpace == NumOps) return;
} else {
return;
}
ReservedSpace = NumOps;
Use *NewOps = new Use[NumOps];
Use *OldOps = OperandList;
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
NewOps[i].init(OldOps[i], this);
OldOps[i].set(0);
}
delete [] OldOps;
OperandList = NewOps;
}
BasicBlock *SwitchInst::getSuccessorV(unsigned idx) const {
return getSuccessor(idx);
}
unsigned SwitchInst::getNumSuccessorsV() const {
return getNumSuccessors();
}
void SwitchInst::setSuccessorV(unsigned idx, BasicBlock *B) {
setSuccessor(idx, B);
}
// Define these methods here so vtables don't get emitted into every translation
// unit that uses these classes.
GetElementPtrInst *GetElementPtrInst::clone() const {
return new GetElementPtrInst(*this);
}
BinaryOperator *BinaryOperator::clone() const {
return create(getOpcode(), Ops[0], Ops[1]);
}
MallocInst *MallocInst::clone() const { return new MallocInst(*this); }
AllocaInst *AllocaInst::clone() const { return new AllocaInst(*this); }
FreeInst *FreeInst::clone() const { return new FreeInst(getOperand(0)); }
LoadInst *LoadInst::clone() const { return new LoadInst(*this); }
StoreInst *StoreInst::clone() const { return new StoreInst(*this); }
CastInst *CastInst::clone() const { return new CastInst(*this); }
CallInst *CallInst::clone() const { return new CallInst(*this); }
ShiftInst *ShiftInst::clone() const { return new ShiftInst(*this); }
SelectInst *SelectInst::clone() const { return new SelectInst(*this); }
VAArgInst *VAArgInst::clone() const { return new VAArgInst(*this); }
ExtractElementInst *ExtractElementInst::clone() const {
return new ExtractElementInst(*this);
}
InsertElementInst *InsertElementInst::clone() const {
return new InsertElementInst(*this);
}
ShuffleVectorInst *ShuffleVectorInst::clone() const {
return new ShuffleVectorInst(*this);
}
PHINode *PHINode::clone() const { return new PHINode(*this); }
ReturnInst *ReturnInst::clone() const { return new ReturnInst(*this); }
BranchInst *BranchInst::clone() const { return new BranchInst(*this); }
SwitchInst *SwitchInst::clone() const { return new SwitchInst(*this); }
InvokeInst *InvokeInst::clone() const { return new InvokeInst(*this); }
UnwindInst *UnwindInst::clone() const { return new UnwindInst(); }
UnreachableInst *UnreachableInst::clone() const { return new UnreachableInst();}
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