150 lines
5.2 KiB
C++
150 lines
5.2 KiB
C++
//===---- 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/Support/IRBuilder.h"
|
|
#include "llvm/GlobalVariable.h"
|
|
#include "llvm/Function.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, "", 0, false);
|
|
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);
|
|
}
|