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Use local variable to improve readability.

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No functional change intended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216611 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjay Patel 2014-08-27 20:40:31 +00:00
parent 644da3245f
commit 5b92f447ab
1 changed files with 10 additions and 15 deletions
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25
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -6762,6 +6762,7 @@ SDValue DAGCombiner::visitFSUB(SDNode *N) {
ConstantFPSDNode *N1CFP = dyn_cast<ConstantFPSDNode>(N1);
EVT VT = N->getValueType(0);
SDLoc dl(N);
const TargetOptions *Options = &DAG.getTarget().Options;
// fold vector ops
if (VT.isVector()) {
@ -6773,19 +6774,17 @@ SDValue DAGCombiner::visitFSUB(SDNode *N) {
if (N0CFP && N1CFP)
return DAG.getNode(ISD::FSUB, SDLoc(N), VT, N0, N1);
// fold (fsub A, 0) -> A
if (DAG.getTarget().Options.UnsafeFPMath &&
N1CFP && N1CFP->getValueAPF().isZero())
if (Options->UnsafeFPMath && N1CFP && N1CFP->getValueAPF().isZero())
return N0;
// fold (fsub 0, B) -> -B
if (DAG.getTarget().Options.UnsafeFPMath &&
N0CFP && N0CFP->getValueAPF().isZero()) {
if (isNegatibleForFree(N1, LegalOperations, TLI, &DAG.getTarget().Options))
if (Options->UnsafeFPMath && N0CFP && N0CFP->getValueAPF().isZero()) {
if (isNegatibleForFree(N1, LegalOperations, TLI, Options))
return GetNegatedExpression(N1, DAG, LegalOperations);
if (!LegalOperations || TLI.isOperationLegal(ISD::FNEG, VT))
return DAG.getNode(ISD::FNEG, dl, VT, N1);
}
// fold (fsub A, (fneg B)) -> (fadd A, B)
if (isNegatibleForFree(N1, LegalOperations, TLI, &DAG.getTarget().Options))
if (isNegatibleForFree(N1, LegalOperations, TLI, Options))
return DAG.getNode(ISD::FADD, dl, VT, N0,
GetNegatedExpression(N1, DAG, LegalOperations));
@ -6793,7 +6792,7 @@ SDValue DAGCombiner::visitFSUB(SDNode *N) {
// (fsub x, x) -> 0.0 &
// (fsub x, (fadd x, y)) -> (fneg y) &
// (fsub x, (fadd y, x)) -> (fneg y)
if (DAG.getTarget().Options.UnsafeFPMath) {
if (Options->UnsafeFPMath) {
if (N0 == N1)
return DAG.getConstantFP(0.0f, VT);
@ -6801,21 +6800,17 @@ SDValue DAGCombiner::visitFSUB(SDNode *N) {
SDValue N10 = N1->getOperand(0);
SDValue N11 = N1->getOperand(1);
if (N10 == N0 && isNegatibleForFree(N11, LegalOperations, TLI,
&DAG.getTarget().Options))
if (N10 == N0 && isNegatibleForFree(N11, LegalOperations, TLI, Options))
return GetNegatedExpression(N11, DAG, LegalOperations);
if (N11 == N0 && isNegatibleForFree(N10, LegalOperations, TLI,
&DAG.getTarget().Options))
if (N11 == N0 && isNegatibleForFree(N10, LegalOperations, TLI, Options))
return GetNegatedExpression(N10, DAG, LegalOperations);
}
}
// FSUB -> FMA combines:
if ((DAG.getTarget().Options.AllowFPOpFusion == FPOpFusion::Fast ||
DAG.getTarget().Options.UnsafeFPMath) &&
DAG.getTarget()
.getSubtargetImpl()
if ((Options->AllowFPOpFusion == FPOpFusion::Fast || Options->UnsafeFPMath) &&
DAG.getTarget().getSubtargetImpl()
->getTargetLowering()
->isFMAFasterThanFMulAndFAdd(VT) &&
(!LegalOperations || TLI.isOperationLegalOrCustom(ISD::FMA, VT))) {