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[InstCombine] use getFltSemantics() instead of duplicating it; NFC 

llvm-svn: 345613
This commit is contained in:
Sanjay Patel 2018-10-30 16:21:56 +00:00
parent 5a8fd65700
commit 68a61cb07c
1 changed files with 3 additions and 19 deletions
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22
llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
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@ -5368,33 +5368,17 @@ Instruction *InstCombiner::visitFCmpInst(FCmpInst &I) {
if (!RHSF)
break;
const fltSemantics *Sem;
// FIXME: This shouldn't be here.
if (LHSExt->getSrcTy()->isHalfTy())
Sem = &APFloat::IEEEhalf();
else if (LHSExt->getSrcTy()->isFloatTy())
Sem = &APFloat::IEEEsingle();
else if (LHSExt->getSrcTy()->isDoubleTy())
Sem = &APFloat::IEEEdouble();
else if (LHSExt->getSrcTy()->isFP128Ty())
Sem = &APFloat::IEEEquad();
else if (LHSExt->getSrcTy()->isX86_FP80Ty())
Sem = &APFloat::x87DoubleExtended();
else if (LHSExt->getSrcTy()->isPPC_FP128Ty())
Sem = &APFloat::PPCDoubleDouble();
else
break;
const fltSemantics &FPSem = LHSExt->getSrcTy()->getFltSemantics();
bool Lossy;
APFloat F = RHSF->getValueAPF();
F.convert(*Sem, APFloat::rmNearestTiesToEven, &Lossy);
F.convert(FPSem, APFloat::rmNearestTiesToEven, &Lossy);
// Avoid lossy conversions and denormals. Zero is a special case
// that's OK to convert.
APFloat Fabs = F;
Fabs.clearSign();
if (!Lossy &&
((Fabs.compare(APFloat::getSmallestNormalized(*Sem)) !=
((Fabs.compare(APFloat::getSmallestNormalized(FPSem)) !=
APFloat::cmpLessThan) || Fabs.isZero()))
return new FCmpInst(Pred, LHSExt->getOperand(0),