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//===---- IRBuilder.cpp - Builder for LLVM Instrs -------------------------===//
//
// 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 IRBuilder class, which is used as a convenient way
// to create LLVM instructions with a consistent and simplified interface.
//
//===----------------------------------------------------------------------===//
#include "llvm/Function.h"
#include "llvm/GlobalVariable.h"
#include "llvm/IRBuilder.h"
#include "llvm/Intrinsics.h"
#include "llvm/LLVMContext.h"
using namespace llvm;
/// CreateGlobalString - Make a new global variable with an initializer that
/// has array of i8 type filled in with the nul terminated string value
/// specified. If Name is specified, it is the name of the global variable
/// created.
Value *IRBuilderBase::CreateGlobalString(StringRef Str, const Twine &Name) {
Constant *StrConstant = ConstantDataArray::getString(Context, Str);
Module &M = *BB->getParent()->getParent();
GlobalVariable *GV = new GlobalVariable(M, StrConstant->getType(),
true, GlobalValue::PrivateLinkage,
StrConstant);
GV->setName(Name);
GV->setUnnamedAddr(true);
return GV;
}
Type *IRBuilderBase::getCurrentFunctionReturnType() const {
assert(BB && BB->getParent() && "No current function!");
return BB->getParent()->getReturnType();
}
Value *IRBuilderBase::getCastedInt8PtrValue(Value *Ptr) {
PointerType *PT = cast<PointerType>(Ptr->getType());
if (PT->getElementType()->isIntegerTy(8))
return Ptr;
// Otherwise, we need to insert a bitcast.
PT = getInt8PtrTy(PT->getAddressSpace());
BitCastInst *BCI = new BitCastInst(Ptr, PT, "");
BB->getInstList().insert(InsertPt, BCI);
SetInstDebugLocation(BCI);
return BCI;
}
static CallInst *createCallHelper(Value *Callee, ArrayRef<Value *> Ops,
IRBuilderBase *Builder) {
CallInst *CI = CallInst::Create(Callee, Ops, "");
Builder->GetInsertBlock()->getInstList().insert(Builder->GetInsertPoint(),CI);
Builder->SetInstDebugLocation(CI);
return CI;
}
CallInst *IRBuilderBase::
CreateMemSet(Value *Ptr, Value *Val, Value *Size, unsigned Align,
bool isVolatile, MDNode *TBAATag) {
Ptr = getCastedInt8PtrValue(Ptr);
Value *Ops[] = { Ptr, Val, Size, getInt32(Align), getInt1(isVolatile) };
Type *Tys[] = { Ptr->getType(), Size->getType() };
Module *M = BB->getParent()->getParent();
Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memset, Tys);
CallInst *CI = createCallHelper(TheFn, Ops, this);
// Set the TBAA info if present.
if (TBAATag)
CI->setMetadata(LLVMContext::MD_tbaa, TBAATag);
return CI;
}
CallInst *IRBuilderBase::
CreateMemCpy(Value *Dst, Value *Src, Value *Size, unsigned Align,
bool isVolatile, MDNode *TBAATag) {
Dst = getCastedInt8PtrValue(Dst);
Src = getCastedInt8PtrValue(Src);
Value *Ops[] = { Dst, Src, Size, getInt32(Align), getInt1(isVolatile) };
Type *Tys[] = { Dst->getType(), Src->getType(), Size->getType() };
Module *M = BB->getParent()->getParent();
Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memcpy, Tys);
CallInst *CI = createCallHelper(TheFn, Ops, this);
// Set the TBAA info if present.
if (TBAATag)
CI->setMetadata(LLVMContext::MD_tbaa, TBAATag);
return CI;
}
CallInst *IRBuilderBase::
CreateMemMove(Value *Dst, Value *Src, Value *Size, unsigned Align,
bool isVolatile, MDNode *TBAATag) {
Dst = getCastedInt8PtrValue(Dst);
Src = getCastedInt8PtrValue(Src);
Value *Ops[] = { Dst, Src, Size, getInt32(Align), getInt1(isVolatile) };
Type *Tys[] = { Dst->getType(), Src->getType(), Size->getType() };
Module *M = BB->getParent()->getParent();
Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memmove, Tys);
CallInst *CI = createCallHelper(TheFn, Ops, this);
// Set the TBAA info if present.
if (TBAATag)
CI->setMetadata(LLVMContext::MD_tbaa, TBAATag);
return CI;
}
CallInst *IRBuilderBase::CreateLifetimeStart(Value *Ptr, ConstantInt *Size) {
assert(isa<PointerType>(Ptr->getType()) &&
"lifetime.start only applies to pointers.");
Ptr = getCastedInt8PtrValue(Ptr);
if (!Size)
Size = getInt64(-1);
else
assert(Size->getType() == getInt64Ty() &&
"lifetime.start requires the size to be an i64");
Value *Ops[] = { Size, Ptr };
Module *M = BB->getParent()->getParent();
Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::lifetime_start);
return createCallHelper(TheFn, Ops, this);
}
CallInst *IRBuilderBase::CreateLifetimeEnd(Value *Ptr, ConstantInt *Size) {
assert(isa<PointerType>(Ptr->getType()) &&
"lifetime.end only applies to pointers.");
Ptr = getCastedInt8PtrValue(Ptr);
if (!Size)
Size = getInt64(-1);
else
assert(Size->getType() == getInt64Ty() &&
"lifetime.end requires the size to be an i64");
Value *Ops[] = { Size, Ptr };
Module *M = BB->getParent()->getParent();
Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::lifetime_end);
return createCallHelper(TheFn, Ops, this);
}
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