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- Update load folding checks to match those auto-generated by tblgen.

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- Manually select SDOperand's returned by TryFoldLoad which make up the
  load address.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26012 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-02-06 06:02:33 +00:00
parent 0a83ed506c
commit 5e35168b11
1 changed files with 26 additions and 11 deletions
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37
lib/Target/X86/X86ISelDAGToDAG.cpp
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@ -111,7 +111,8 @@ namespace {
SDOperand &Index, SDOperand &Disp);
bool SelectLEAAddr(SDOperand N, SDOperand &Base, SDOperand &Scale,
SDOperand &Index, SDOperand &Disp);
bool TryFoldLoad(SDOperand N, SDOperand &Base, SDOperand &Scale,
bool TryFoldLoad(SDOperand P, SDOperand N,
SDOperand &Base, SDOperand &Scale,
SDOperand &Index, SDOperand &Disp);
inline void getAddressOperands(X86ISelAddressMode &AM, SDOperand &Base,
@ -381,11 +382,13 @@ bool X86DAGToDAGISel::SelectAddr(SDOperand N, SDOperand &Base, SDOperand &Scale,
return true;
}
bool X86DAGToDAGISel::TryFoldLoad(SDOperand N, SDOperand &Base,
SDOperand &Scale, SDOperand &Index,
SDOperand &Disp) {
if (N.getOpcode() == ISD::LOAD && N.hasOneUse() &&
CodeGenMap.count(N.getValue(1)) == 0)
bool X86DAGToDAGISel::TryFoldLoad(SDOperand P, SDOperand N,
SDOperand &Base, SDOperand &Scale,
SDOperand &Index, SDOperand &Disp) {
if (N.getOpcode() == ISD::LOAD &&
N.hasOneUse() &&
!CodeGenMap.count(N.getValue(0)) &&
(P.getNumOperands() == 1 || !isNonImmUse(P.Val, N.Val)))
return SelectAddr(N.getOperand(1), Base, Scale, Index, Disp);
return false;
}
@ -486,10 +489,10 @@ SDOperand X86DAGToDAGISel::Select(SDOperand N) {
bool foldedLoad = false;
SDOperand Tmp0, Tmp1, Tmp2, Tmp3;
foldedLoad = TryFoldLoad(N1, Tmp0, Tmp1, Tmp2, Tmp3);
foldedLoad = TryFoldLoad(N, N1, Tmp0, Tmp1, Tmp2, Tmp3);
// MULHU and MULHS are commmutative
if (!foldedLoad) {
foldedLoad = TryFoldLoad(N0, Tmp0, Tmp1, Tmp2, Tmp3);
foldedLoad = TryFoldLoad(N, N0, Tmp0, Tmp1, Tmp2, Tmp3);
if (foldedLoad) {
N0 = Node->getOperand(1);
N1 = Node->getOperand(0);
@ -505,6 +508,10 @@ SDOperand X86DAGToDAGISel::Select(SDOperand N) {
InFlag = Chain.getValue(1);
if (foldedLoad) {
Tmp0 = Select(Tmp0);
Tmp1 = Select(Tmp1);
Tmp2 = Select(Tmp2);
Tmp3 = Select(Tmp3);
Chain = CurDAG->getTargetNode(MOpc, MVT::Other, MVT::Flag, Tmp0, Tmp1,
Tmp2, Tmp3, Chain, InFlag);
InFlag = Chain.getValue(1);
@ -514,8 +521,10 @@ SDOperand X86DAGToDAGISel::Select(SDOperand N) {
SDOperand Result = CurDAG->getCopyFromReg(Chain, HiReg, NVT, InFlag);
CodeGenMap[N.getValue(0)] = Result;
if (foldedLoad)
if (foldedLoad) {
CodeGenMap[N1.getValue(1)] = Result.getValue(1);
AddHandleReplacement(N1.getValue(1), Result.getValue(1));
}
return Result;
}
@ -566,7 +575,7 @@ SDOperand X86DAGToDAGISel::Select(SDOperand N) {
bool foldedLoad = false;
SDOperand Tmp0, Tmp1, Tmp2, Tmp3;
foldedLoad = TryFoldLoad(N1, Tmp0, Tmp1, Tmp2, Tmp3);
foldedLoad = TryFoldLoad(N, N1, Tmp0, Tmp1, Tmp2, Tmp3);
SDOperand Chain = foldedLoad ? Select(N1.getOperand(0))
: CurDAG->getEntryNode();
@ -589,6 +598,10 @@ SDOperand X86DAGToDAGISel::Select(SDOperand N) {
}
if (foldedLoad) {
Tmp0 = Select(Tmp0);
Tmp1 = Select(Tmp1);
Tmp2 = Select(Tmp2);
Tmp3 = Select(Tmp3);
Chain = CurDAG->getTargetNode(MOpc, MVT::Other, MVT::Flag, Tmp0, Tmp1,
Tmp2, Tmp3, Chain, InFlag);
InFlag = Chain.getValue(1);
@ -599,8 +612,10 @@ SDOperand X86DAGToDAGISel::Select(SDOperand N) {
SDOperand Result = CurDAG->getCopyFromReg(Chain, isDiv ? LoReg : HiReg,
NVT, InFlag);
CodeGenMap[N.getValue(0)] = Result;
if (foldedLoad)
if (foldedLoad) {
CodeGenMap[N1.getValue(1)] = Result.getValue(1);
AddHandleReplacement(N1.getValue(1), Result.getValue(1));
}
return Result;
}