mirror of
https://github.com/RPCSX/llvm.git
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18c7f80b3e
but with a critical fix to the SelectionDAG code that optimizes copies from strings into immediate stores: the previous code was stopping reading string data at the first nul. Address this by adding a new argument to llvm::getConstantStringInfo, preserving the behavior before the patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149800 91177308-0d34-0410-b5e6-96231b3b80d8
150 lines
5.2 KiB
C++
150 lines
5.2 KiB
C++
//===---- IRBuilder.cpp - Builder for LLVM Instrs -------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the IRBuilder class, which is used as a convenient way
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// to create LLVM instructions with a consistent and simplified interface.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/IRBuilder.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/Function.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/LLVMContext.h"
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using namespace llvm;
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/// CreateGlobalString - Make a new global variable with an initializer that
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/// has array of i8 type filled in with the nul terminated string value
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/// specified. If Name is specified, it is the name of the global variable
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/// created.
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Value *IRBuilderBase::CreateGlobalString(StringRef Str, const Twine &Name) {
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Constant *StrConstant = ConstantDataArray::getString(Context, Str);
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Module &M = *BB->getParent()->getParent();
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GlobalVariable *GV = new GlobalVariable(M, StrConstant->getType(),
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true, GlobalValue::PrivateLinkage,
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StrConstant, "", 0, false);
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GV->setName(Name);
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GV->setUnnamedAddr(true);
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return GV;
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}
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Type *IRBuilderBase::getCurrentFunctionReturnType() const {
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assert(BB && BB->getParent() && "No current function!");
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return BB->getParent()->getReturnType();
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}
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Value *IRBuilderBase::getCastedInt8PtrValue(Value *Ptr) {
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PointerType *PT = cast<PointerType>(Ptr->getType());
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if (PT->getElementType()->isIntegerTy(8))
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return Ptr;
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// Otherwise, we need to insert a bitcast.
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PT = getInt8PtrTy(PT->getAddressSpace());
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BitCastInst *BCI = new BitCastInst(Ptr, PT, "");
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BB->getInstList().insert(InsertPt, BCI);
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SetInstDebugLocation(BCI);
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return BCI;
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}
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static CallInst *createCallHelper(Value *Callee, ArrayRef<Value *> Ops,
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IRBuilderBase *Builder) {
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CallInst *CI = CallInst::Create(Callee, Ops, "");
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Builder->GetInsertBlock()->getInstList().insert(Builder->GetInsertPoint(),CI);
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Builder->SetInstDebugLocation(CI);
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return CI;
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}
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CallInst *IRBuilderBase::
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CreateMemSet(Value *Ptr, Value *Val, Value *Size, unsigned Align,
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bool isVolatile, MDNode *TBAATag) {
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Ptr = getCastedInt8PtrValue(Ptr);
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Value *Ops[] = { Ptr, Val, Size, getInt32(Align), getInt1(isVolatile) };
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Type *Tys[] = { Ptr->getType(), Size->getType() };
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Module *M = BB->getParent()->getParent();
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Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memset, Tys);
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CallInst *CI = createCallHelper(TheFn, Ops, this);
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// Set the TBAA info if present.
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if (TBAATag)
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CI->setMetadata(LLVMContext::MD_tbaa, TBAATag);
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return CI;
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}
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CallInst *IRBuilderBase::
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CreateMemCpy(Value *Dst, Value *Src, Value *Size, unsigned Align,
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bool isVolatile, MDNode *TBAATag) {
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Dst = getCastedInt8PtrValue(Dst);
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Src = getCastedInt8PtrValue(Src);
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Value *Ops[] = { Dst, Src, Size, getInt32(Align), getInt1(isVolatile) };
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Type *Tys[] = { Dst->getType(), Src->getType(), Size->getType() };
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Module *M = BB->getParent()->getParent();
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Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memcpy, Tys);
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CallInst *CI = createCallHelper(TheFn, Ops, this);
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// Set the TBAA info if present.
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if (TBAATag)
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CI->setMetadata(LLVMContext::MD_tbaa, TBAATag);
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return CI;
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}
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CallInst *IRBuilderBase::
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CreateMemMove(Value *Dst, Value *Src, Value *Size, unsigned Align,
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bool isVolatile, MDNode *TBAATag) {
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Dst = getCastedInt8PtrValue(Dst);
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Src = getCastedInt8PtrValue(Src);
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Value *Ops[] = { Dst, Src, Size, getInt32(Align), getInt1(isVolatile) };
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Type *Tys[] = { Dst->getType(), Src->getType(), Size->getType() };
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Module *M = BB->getParent()->getParent();
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Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::memmove, Tys);
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CallInst *CI = createCallHelper(TheFn, Ops, this);
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// Set the TBAA info if present.
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if (TBAATag)
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CI->setMetadata(LLVMContext::MD_tbaa, TBAATag);
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return CI;
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}
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CallInst *IRBuilderBase::CreateLifetimeStart(Value *Ptr, ConstantInt *Size) {
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assert(isa<PointerType>(Ptr->getType()) &&
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"lifetime.start only applies to pointers.");
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Ptr = getCastedInt8PtrValue(Ptr);
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if (!Size)
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Size = getInt64(-1);
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else
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assert(Size->getType() == getInt64Ty() &&
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"lifetime.start requires the size to be an i64");
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Value *Ops[] = { Size, Ptr };
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Module *M = BB->getParent()->getParent();
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Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::lifetime_start);
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return createCallHelper(TheFn, Ops, this);
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}
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CallInst *IRBuilderBase::CreateLifetimeEnd(Value *Ptr, ConstantInt *Size) {
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assert(isa<PointerType>(Ptr->getType()) &&
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"lifetime.end only applies to pointers.");
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Ptr = getCastedInt8PtrValue(Ptr);
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if (!Size)
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Size = getInt64(-1);
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else
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assert(Size->getType() == getInt64Ty() &&
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"lifetime.end requires the size to be an i64");
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Value *Ops[] = { Size, Ptr };
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Module *M = BB->getParent()->getParent();
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Value *TheFn = Intrinsic::getDeclaration(M, Intrinsic::lifetime_end);
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return createCallHelper(TheFn, Ops, this);
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}
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