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Make several cleanups to Andrews varargs change:

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1. Pass Value*'s into lowering methods so that the proper pointers can be
   added to load/stores from the valist
2. Intrinsics that return void should only return a token chain, not a token
   chain/retval pair.
3. Rename LowerVAArgNext -> LowerVAArg, because VANext is long gone.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22338 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-07-05 19:57:53 +00:00
parent f2eb1396b8
commit e64e72b794
2 changed files with 43 additions and 35 deletions
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47
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@@ -837,34 +837,37 @@ void SelectionDAGLowering::visitFree(FreeInst &I) {
DAG.setRoot(Result.second);
}
std::pair<SDOperand, SDOperand>
TargetLowering::LowerVAStart(SDOperand Chain, SelectionDAG &DAG, SDOperand Dest) {
SDOperand TargetLowering::LowerVAStart(SDOperand Chain,
SDOperand VAListP, Value *VAListV,
SelectionDAG &DAG) {
// We have no sane default behavior, just emit a useful error message and bail
// out.
std::cerr << "Variable arguments handling not implemented on this target!\n";
abort();
return std::make_pair(SDOperand(), SDOperand());
return SDOperand();
}
SDOperand TargetLowering::LowerVAEnd(SDOperand Chain, SDOperand L,
SDOperand TargetLowering::LowerVAEnd(SDOperand Chain, SDOperand LP, Value *LV,
SelectionDAG &DAG) {
// Default to a noop.
return Chain;
}
std::pair<SDOperand,SDOperand>
TargetLowering::LowerVACopy(SDOperand Chain, SDOperand Src, SDOperand Dest,
SelectionDAG &DAG) {
//Default to returning the input list
SDOperand Val = DAG.getLoad(getPointerTy(), Chain, Src, DAG.getSrcValue(NULL));
SDOperand TargetLowering::LowerVACopy(SDOperand Chain,
SDOperand SrcP, Value *SrcV,
SDOperand DestP, Value *DestV,
SelectionDAG &DAG) {
// Default to copying the input list.
SDOperand Val = DAG.getLoad(getPointerTy(), Chain,
SrcP, DAG.getSrcValue(SrcV));
SDOperand Result = DAG.getNode(ISD::STORE, MVT::Other, Val.getValue(1),
Val, Dest, DAG.getSrcValue(NULL));
return std::make_pair(Result, Result);
Val, DestP, DAG.getSrcValue(DestV));
return Result;
}
std::pair<SDOperand,SDOperand>
TargetLowering::LowerVAArgNext(SDOperand Chain, SDOperand VAList,
const Type *ArgTy, SelectionDAG &DAG) {
TargetLowering::LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV,
const Type *ArgTy, SelectionDAG &DAG) {
// We have no sane default behavior, just emit a useful error message and bail
// out.
std::cerr << "Variable arguments handling not implemented on this target!\n";
@@ -874,28 +877,28 @@ TargetLowering::LowerVAArgNext(SDOperand Chain, SDOperand VAList,
void SelectionDAGLowering::visitVAStart(CallInst &I) {
std::pair<SDOperand,SDOperand> Result = TLI.LowerVAStart(getRoot(), DAG, getValue(I.getOperand(1)));
setValue(&I, Result.first);
DAG.setRoot(Result.second);
DAG.setRoot(TLI.LowerVAStart(getRoot(), getValue(I.getOperand(1)),
I.getOperand(1), DAG));
}
void SelectionDAGLowering::visitVAArg(VAArgInst &I) {
std::pair<SDOperand,SDOperand> Result =
TLI.LowerVAArgNext(getRoot(), getValue(I.getOperand(0)),
TLI.LowerVAArg(getRoot(), getValue(I.getOperand(0)), I.getOperand(0),
I.getType(), DAG);
setValue(&I, Result.first);
DAG.setRoot(Result.second);
}
void SelectionDAGLowering::visitVAEnd(CallInst &I) {
DAG.setRoot(TLI.LowerVAEnd(getRoot(), getValue(I.getOperand(1)), DAG));
DAG.setRoot(TLI.LowerVAEnd(getRoot(), getValue(I.getOperand(1)),
I.getOperand(1), DAG));
}
void SelectionDAGLowering::visitVACopy(CallInst &I) {
std::pair<SDOperand,SDOperand> Result =
TLI.LowerVACopy(getRoot(), getValue(I.getOperand(2)), getValue(I.getOperand(1)), DAG);
setValue(&I, Result.first);
DAG.setRoot(Result.second);
SDOperand Result =
TLI.LowerVACopy(getRoot(), getValue(I.getOperand(2)), I.getOperand(2),
getValue(I.getOperand(1)), I.getOperand(1), DAG);
DAG.setRoot(Result);
}