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don't try to avoid inserting loads when lowering FORMAL_ARGUMENTS.

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DAGCombine is now quite good at zapifying them.

llvm-svn: 47053
This commit is contained in:
Chris Lattner 2008-02-13 07:35:30 +00:00
parent c798882db7
commit 57f2088225
3 changed files with 17 additions and 39 deletions
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25
lib/Target/ARM/ARMISelLowering.cpp
View File

@ -954,22 +954,15 @@ static SDOperand LowerFORMAL_ARGUMENT(SDOperand Op, SelectionDAG &DAG,
NumGPRs += ObjGPRs;
if (ObjSize) {
// If the argument is actually used, emit a load from the right stack
// slot.
if (!Op.Val->hasNUsesOfValue(0, ArgNo)) {
MachineFrameInfo *MFI = MF.getFrameInfo();
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
if (ObjGPRs == 0)
ArgValue = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
else {
SDOperand ArgValue2 = DAG.getLoad(MVT::i32, Root, FIN, NULL, 0);
assert(ObjectVT != MVT::i64 && "i64 should already be lowered");
ArgValue = DAG.getNode(ARMISD::FMDRR, MVT::f64, ArgValue, ArgValue2);
}
} else {
// Don't emit a dead load.
ArgValue = DAG.getNode(ISD::UNDEF, ObjectVT);
MachineFrameInfo *MFI = MF.getFrameInfo();
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
if (ObjGPRs == 0)
ArgValue = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
else {
SDOperand ArgValue2 = DAG.getLoad(MVT::i32, Root, FIN, NULL, 0);
assert(ObjectVT != MVT::i64 && "i64 should already be lowered");
ArgValue = DAG.getNode(ARMISD::FMDRR, MVT::f64, ArgValue, ArgValue2);
}
ArgOffset += ObjSize; // Move on to the next argument.

14
lib/Target/CellSPU/SPUISelLowering.cpp
View File

@ -1008,17 +1008,9 @@ LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG, int &VarArgsFrameIndex)
// We need to load the argument to a virtual register if we determined above
// that we ran out of physical registers of the appropriate type
if (needsLoad) {
// If the argument is actually used, emit a load from the right stack
// slot.
if (!Op.Val->hasNUsesOfValue(0, ArgNo)) {
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
} else {
// Don't emit a dead load.
ArgVal = DAG.getNode(ISD::UNDEF, ObjectVT);
}
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
ArgOffset += StackSlotSize;
}

17
lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -1420,19 +1420,12 @@ static SDOperand LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG,
}
// We need to load the argument to a virtual register if we determined above
// that we ran out of physical registers of the appropriate type
// that we ran out of physical registers of the appropriate type.
if (needsLoad) {
// If the argument is actually used, emit a load from the right stack
// slot.
if (!Op.Val->hasNUsesOfValue(0, ArgNo)) {
int FI = MFI->CreateFixedObject(ObjSize,
CurArgOffset + (ArgSize - ObjSize));
SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
} else {
// Don't emit a dead load.
ArgVal = DAG.getNode(ISD::UNDEF, ObjectVT);
}
int FI = MFI->CreateFixedObject(ObjSize,
CurArgOffset + (ArgSize - ObjSize));
SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
}
ArgValues.push_back(ArgVal);