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author | Chris Lattner <sabre@nondot.org> | 2010-12-26 22:49:25 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2010-12-26 22:49:25 +0000 |
commit | c0d5496b8aa9993e61ac5770e58184dd32f709bf (patch) | |
tree | a0527d4606a65849ea07bd9e28817a6c3e9b48ed /lib/VMCore/IRBuilder.cpp | |
parent | 390b693dac1816685cce3074c0ec96e5d1a6c5a4 (diff) | |
download | external_llvm-c0d5496b8aa9993e61ac5770e58184dd32f709bf.zip external_llvm-c0d5496b8aa9993e61ac5770e58184dd32f709bf.tar.gz external_llvm-c0d5496b8aa9993e61ac5770e58184dd32f709bf.tar.bz2 |
add methods to IRBuilder to create memcpy/memset/memmove.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122571 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/VMCore/IRBuilder.cpp')
-rw-r--r-- | lib/VMCore/IRBuilder.cpp | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/lib/VMCore/IRBuilder.cpp b/lib/VMCore/IRBuilder.cpp index c1b783c..595dea4 100644 --- a/lib/VMCore/IRBuilder.cpp +++ b/lib/VMCore/IRBuilder.cpp @@ -15,6 +15,7 @@ #include "llvm/Support/IRBuilder.h" #include "llvm/GlobalVariable.h" #include "llvm/Function.h" +#include "llvm/Intrinsics.h" #include "llvm/LLVMContext.h" using namespace llvm; @@ -36,3 +37,83 @@ 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; +} |