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[InstSimplify] reduce code duplication for fcmp folds; NFC

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llvm-svn: 362904
This commit is contained in:
Sanjay Patel 2019-06-09 13:58:46 +00:00
parent 1361930fcb
commit b22b368718
1 changed files with 7 additions and 10 deletions
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17
lib/Analysis/InstructionSimplify.cpp
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@ -3477,22 +3477,19 @@ static Value *SimplifyFCmpInst(unsigned Predicate, Value *LHS, Value *RHS,
if (match(RHS, m_AnyZeroFP())) {
switch (Pred) {
case FCmpInst::FCMP_OGE:
case FCmpInst::FCMP_ULT:
// Positive or zero X >= 0.0 --> true
// Positive or zero X < 0.0 --> false
if ((FMF.noNaNs() || isKnownNeverNaN(LHS, Q.TLI)) &&
CannotBeOrderedLessThanZero(LHS, Q.TLI))
return getTrue(RetTy);
return Pred == FCmpInst::FCMP_OGE ? getTrue(RetTy) : getFalse(RetTy);
break;
case FCmpInst::FCMP_UGE:
if (CannotBeOrderedLessThanZero(LHS, Q.TLI))
return getTrue(RetTy);
break;
case FCmpInst::FCMP_ULT:
if ((FMF.noNaNs() || isKnownNeverNaN(LHS, Q.TLI)) &&
CannotBeOrderedLessThanZero(LHS, Q.TLI))
return getFalse(RetTy);
break;
case FCmpInst::FCMP_OLT:
// Positive or zero or nan X >= 0.0 --> true
// Positive or zero or nan X < 0.0 --> false
if (CannotBeOrderedLessThanZero(LHS, Q.TLI))
return getFalse(RetTy);
return Pred == FCmpInst::FCMP_UGE ? getTrue(RetTy) : getFalse(RetTy);
break;
default:
break;