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Turn memset/memcpy/memmove into the corresponding operations.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19463 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-01-11 05:56:49 +00:00
parent ef36aa75d7
commit 7041ee35ad
1 changed files with 15 additions and 52 deletions
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67
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -311,9 +311,7 @@ public:
void visitVACopy(CallInst &I);
void visitFrameReturnAddress(CallInst &I, bool isFrameAddress);
void visitMemSet(CallInst &I);
void visitMemCpy(CallInst &I);
void visitMemMove(CallInst &I);
void visitMemIntrinsic(CallInst &I, unsigned Op);
void visitUserOp1(Instruction &I) {
assert(0 && "UserOp1 should not exist at instruction selection time!");
@ -583,9 +581,9 @@ void SelectionDAGLowering::visitCall(CallInst &I) {
return;
case Intrinsic::setjmp: RenameFn = "setjmp"; break;
case Intrinsic::longjmp: RenameFn = "longjmp"; break;
case Intrinsic::memcpy: visitMemCpy(I); return;
case Intrinsic::memset: visitMemSet(I); return;
case Intrinsic::memmove: visitMemMove(I); return;
case Intrinsic::memcpy: visitMemIntrinsic(I, ISD::MEMCPY); return;
case Intrinsic::memset: visitMemIntrinsic(I, ISD::MEMSET); return;
case Intrinsic::memmove: visitMemIntrinsic(I, ISD::MEMMOVE); return;
case Intrinsic::isunordered:
setValue(&I, DAG.getSetCC(ISD::SETUO, getValue(I.getOperand(1)),
@ -727,54 +725,19 @@ void SelectionDAGLowering::visitFrameReturnAddress(CallInst &I, bool isFrame) {
DAG.setRoot(Result.second);
}
void SelectionDAGLowering::visitMemSet(CallInst &I) {
MVT::ValueType IntPtr = TLI.getPointerTy();
const Type *IntPtrTy = TLI.getTargetData().getIntPtrType();
// Extend the ubyte argument to be an int value for the call.
SDOperand Val = getValue(I.getOperand(2));
Val = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Val);
std::vector<std::pair<SDOperand, const Type*> > Args;
Args.push_back(std::make_pair(getValue(I.getOperand(1)), IntPtrTy));
Args.push_back(std::make_pair(Val, Type::IntTy));
Args.push_back(std::make_pair(getValue(I.getOperand(3)), IntPtrTy));
std::pair<SDOperand,SDOperand> Result =
TLI.LowerCallTo(DAG.getRoot(), Type::VoidTy,
DAG.getExternalSymbol("memset", IntPtr), Args, DAG);
DAG.setRoot(Result.second);
void SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) {
std::vector<SDOperand> Ops;
Ops.push_back(DAG.getRoot());
Ops.push_back(getValue(I.getOperand(1)));
Ops.push_back(getValue(I.getOperand(2)));
Ops.push_back(getValue(I.getOperand(3)));
Ops.push_back(getValue(I.getOperand(4)));
DAG.setRoot(DAG.getNode(Op, MVT::Other, Ops));
}
void SelectionDAGLowering::visitMemCpy(CallInst &I) {
MVT::ValueType IntPtr = TLI.getPointerTy();
const Type *IntPtrTy = TLI.getTargetData().getIntPtrType();
std::vector<std::pair<SDOperand, const Type*> > Args;
Args.push_back(std::make_pair(getValue(I.getOperand(1)), IntPtrTy));
Args.push_back(std::make_pair(getValue(I.getOperand(2)), IntPtrTy));
Args.push_back(std::make_pair(getValue(I.getOperand(3)), IntPtrTy));
std::pair<SDOperand,SDOperand> Result =
TLI.LowerCallTo(DAG.getRoot(), Type::VoidTy,
DAG.getExternalSymbol("memcpy", IntPtr), Args, DAG);
DAG.setRoot(Result.second);
}
void SelectionDAGLowering::visitMemMove(CallInst &I) {
MVT::ValueType IntPtr = TLI.getPointerTy();
const Type *IntPtrTy = TLI.getTargetData().getIntPtrType();
std::vector<std::pair<SDOperand, const Type*> > Args;
Args.push_back(std::make_pair(getValue(I.getOperand(1)), IntPtrTy));
Args.push_back(std::make_pair(getValue(I.getOperand(2)), IntPtrTy));
Args.push_back(std::make_pair(getValue(I.getOperand(3)), IntPtrTy));
std::pair<SDOperand,SDOperand> Result =
TLI.LowerCallTo(DAG.getRoot(), Type::VoidTy,
DAG.getExternalSymbol("memmove", IntPtr), Args, DAG);
DAG.setRoot(Result.second);
}
//===----------------------------------------------------------------------===//
// SelectionDAGISel code
//===----------------------------------------------------------------------===//
unsigned SelectionDAGISel::MakeReg(MVT::ValueType VT) {
return RegMap->createVirtualRegister(TLI.getRegClassFor(VT));