| //===---- 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 = ConstantArray::get(Context, Str, true); |
| Module &M = *BB->getParent()->getParent(); |
| GlobalVariable *GV = new GlobalVariable(M, StrConstant->getType(), |
| true, GlobalValue::InternalLinkage, |
| StrConstant, "", 0, false); |
| GV->setName(Name); |
| GV->setUnnamedAddr(true); |
| return GV; |
| } |
| |
| const Type *IRBuilderBase::getCurrentFunctionReturnType() const { |
| assert(BB && BB->getParent() && "No current function!"); |
| return BB->getParent()->getReturnType(); |
| } |
| |
| Value *IRBuilderBase::getCastedInt8PtrValue(Value *Ptr) { |
| const 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, Value *const* Ops, |
| unsigned NumOps, IRBuilderBase *Builder) { |
| CallInst *CI = CallInst::Create(Callee, Ops, Ops + NumOps, ""); |
| 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) }; |
| const Type *Tys[] = { Ptr->getType(), Size->getType() }; |
| Module *M = BB->getParent()->getParent(); |
| Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memset, Tys, 2); |
| |
| CallInst *CI = createCallHelper(TheFn, Ops, 5, 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) }; |
| const Type *Tys[] = { Dst->getType(), Src->getType(), Size->getType() }; |
| Module *M = BB->getParent()->getParent(); |
| Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memcpy, Tys, 3); |
| |
| CallInst *CI = createCallHelper(TheFn, Ops, 5, 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) }; |
| const Type *Tys[] = { Dst->getType(), Src->getType(), Size->getType() }; |
| Module *M = BB->getParent()->getParent(); |
| Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memmove, Tys, 3); |
| |
| CallInst *CI = createCallHelper(TheFn, Ops, 5, 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, 2, 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, 2, this); |
| } |