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Move something that should be in the dag combiner from the legalizer to the 

dag combiner.

llvm-svn: 32431
This commit is contained in:
Nate Begeman 2006-12-11 02:23:46 +00:00
parent e8da58b3f9
commit 8e20c760fa
2 changed files with 15 additions and 17 deletions
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14
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
View File

@ -3034,6 +3034,20 @@ SDOperand DAGCombiner::visitSTORE(SDNode *N) {
ST->getSrcValueOffset());
}
// Turn 'store float 1.0, Ptr' -> 'store int 0x12345678, Ptr'
// FIXME: We shouldn't do this for TargetConstantFP's.
if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Value)) {
SDOperand Tmp;
if (CFP->getValueType(0) == MVT::f32) {
Tmp = DAG.getConstant(FloatToBits(CFP->getValue()), MVT::i32);
} else {
assert(CFP->getValueType(0) == MVT::f64 && "Unknown FP type!");
Tmp = DAG.getConstant(DoubleToBits(CFP->getValue()), MVT::i64);
}
return DAG.getStore(Chain, Tmp, Ptr, ST->getSrcValue(),
ST->getSrcValueOffset());
}
if (CombinerAA) {
// Walk up chain skipping non-aliasing memory nodes.
SDOperand BetterChain = FindBetterChain(N, Chain);

18
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -1643,21 +1643,6 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
Tmp2 = LegalizeOp(ST->getBasePtr()); // Legalize the pointer.
if (!ST->isTruncatingStore()) {
// Turn 'store float 1.0, Ptr' -> 'store int 0x12345678, Ptr'
// FIXME: We shouldn't do this for TargetConstantFP's.
// FIXME: move this to the DAG Combiner!
if (ConstantFPSDNode *CFP =dyn_cast<ConstantFPSDNode>(ST->getValue())) {
if (CFP->getValueType(0) == MVT::f32) {
Tmp3 = DAG.getConstant(FloatToBits(CFP->getValue()), MVT::i32);
} else {
assert(CFP->getValueType(0) == MVT::f64 && "Unknown FP type!");
Tmp3 = DAG.getConstant(DoubleToBits(CFP->getValue()), MVT::i64);
}
Result = DAG.getStore(Tmp1, Tmp3, Tmp2, ST->getSrcValue(),
ST->getSrcValueOffset());
break;
}
switch (getTypeAction(ST->getStoredVT())) {
case Legal: {
Tmp3 = LegalizeOp(ST->getValue());
@ -4825,6 +4810,7 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
ExpandOp(Node->getOperand(0), LL, LH);
ExpandOp(Node->getOperand(1), RL, RH);
unsigned SH = MVT::getSizeInBits(RH.getValueType())-1;
// FIXME: Move this to the dag combiner.
// MULHS implicitly sign extends its inputs. Check to see if ExpandOp
// extended the sign bit of the low half through the upper half, and if so
// emit a MULHS instead of the alternate sequence that is valid for any
@ -4838,8 +4824,6 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
LH.getOpcode() == ISD::SRA && LH.getOperand(0) == LL &&
LH.getOperand(1).getOpcode() == ISD::Constant &&
cast<ConstantSDNode>(LH.getOperand(1))->getValue() == SH) {
// FIXME: Move this to the dag combiner.
// Low part:
Lo = DAG.getNode(ISD::MUL, NVT, LL, RL);
// High part: