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Use local variable in visitFADD. No functional change.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216623 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjay Patel 2014-08-27 21:42:42 +00:00
parent 2c4b9ea282
commit a160df5b42
1 changed files with 11 additions and 13 deletions
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24
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -6548,7 +6548,8 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
ConstantFPSDNode *N0CFP = dyn_cast<ConstantFPSDNode>(N0);
ConstantFPSDNode *N1CFP = dyn_cast<ConstantFPSDNode>(N1);
EVT VT = N->getValueType(0);
const TargetOptions *Options = &DAG.getTarget().Options;
// fold vector ops
if (VT.isVector()) {
SDValue FoldedVOp = SimplifyVBinOp(N);
@ -6562,22 +6563,21 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
if (N0CFP && !N1CFP)
return DAG.getNode(ISD::FADD, SDLoc(N), VT, N1, N0);
// fold (fadd A, 0) -> A
if (DAG.getTarget().Options.UnsafeFPMath && N1CFP &&
N1CFP->getValueAPF().isZero())
if (Options->UnsafeFPMath && N1CFP && N1CFP->getValueAPF().isZero())
return N0;
// fold (fadd A, (fneg B)) -> (fsub A, B)
if ((!LegalOperations || TLI.isOperationLegalOrCustom(ISD::FSUB, VT)) &&
isNegatibleForFree(N1, LegalOperations, TLI, &DAG.getTarget().Options) == 2)
isNegatibleForFree(N1, LegalOperations, TLI, Options) == 2)
return DAG.getNode(ISD::FSUB, SDLoc(N), VT, N0,
GetNegatedExpression(N1, DAG, LegalOperations));
// fold (fadd (fneg A), B) -> (fsub B, A)
if ((!LegalOperations || TLI.isOperationLegalOrCustom(ISD::FSUB, VT)) &&
isNegatibleForFree(N0, LegalOperations, TLI, &DAG.getTarget().Options) == 2)
isNegatibleForFree(N0, LegalOperations, TLI, Options) == 2)
return DAG.getNode(ISD::FSUB, SDLoc(N), VT, N1,
GetNegatedExpression(N0, DAG, LegalOperations));
// If allowed, fold (fadd (fadd x, c1), c2) -> (fadd x, (fadd c1, c2))
if (DAG.getTarget().Options.UnsafeFPMath && N1CFP &&
if (Options->UnsafeFPMath && N1CFP &&
N0.getOpcode() == ISD::FADD && N0.getNode()->hasOneUse() &&
isa<ConstantFPSDNode>(N0.getOperand(1)))
return DAG.getNode(ISD::FADD, SDLoc(N), VT, N0.getOperand(0),
@ -6596,20 +6596,19 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
bool AllowNewFpConst = (Level < AfterLegalizeDAG);
// If allow, fold (fadd (fneg x), x) -> 0.0
if (AllowNewFpConst && DAG.getTarget().Options.UnsafeFPMath &&
if (AllowNewFpConst && Options->UnsafeFPMath &&
N0.getOpcode() == ISD::FNEG && N0.getOperand(0) == N1)
return DAG.getConstantFP(0.0, VT);
// If allow, fold (fadd x, (fneg x)) -> 0.0
if (AllowNewFpConst && DAG.getTarget().Options.UnsafeFPMath &&
// If allow, fold (fadd x, (fneg x)) -> 0.0
if (AllowNewFpConst && Options->UnsafeFPMath &&
N1.getOpcode() == ISD::FNEG && N1.getOperand(0) == N0)
return DAG.getConstantFP(0.0, VT);
// In unsafe math mode, we can fold chains of FADD's of the same value
// into multiplications. This transform is not safe in general because
// we are reducing the number of rounding steps.
if (DAG.getTarget().Options.UnsafeFPMath &&
TLI.isOperationLegalOrCustom(ISD::FMUL, VT) &&
if (Options->UnsafeFPMath && TLI.isOperationLegalOrCustom(ISD::FMUL, VT) &&
!N0CFP && !N1CFP) {
if (N0.getOpcode() == ISD::FMUL) {
ConstantFPSDNode *CFP00 = dyn_cast<ConstantFPSDNode>(N0.getOperand(0));
@ -6732,8 +6731,7 @@ SDValue DAGCombiner::visitFADD(SDNode *N) {
}
// FADD -> FMA combines:
if ((DAG.getTarget().Options.AllowFPOpFusion == FPOpFusion::Fast ||
DAG.getTarget().Options.UnsafeFPMath) &&
if ((Options->AllowFPOpFusion == FPOpFusion::Fast || Options->UnsafeFPMath) &&
DAG.getTarget()
.getSubtargetImpl()
->getTargetLowering()