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[InstCombine] add local name for repeated calls; NFC

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llvm-svn: 294470
This commit is contained in:
Sanjay Patel 2017-02-08 16:19:36 +00:00
parent 910da934ce
commit c017a805c8
1 changed files with 4 additions and 6 deletions
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10
lib/Transforms/InstCombine/InstCombineCompares.cpp
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@ -2372,8 +2372,8 @@ Instruction *InstCombiner::foldICmpAddConstant(ICmpInst &Cmp,
// Fold icmp pred (add X, C2), C.
Value *X = Add->getOperand(0);
Type *Ty = Add->getType();
auto CR =
ConstantRange::makeExactICmpRegion(Cmp.getPredicate(), *C).subtract(*C2);
CmpInst::Predicate Pred = Cmp.getPredicate();
auto CR = ConstantRange::makeExactICmpRegion(Pred, *C).subtract(*C2);
const APInt &Upper = CR.getUpper();
const APInt &Lower = CR.getLower();
if (Cmp.isSigned()) {
@ -2394,16 +2394,14 @@ Instruction *InstCombiner::foldICmpAddConstant(ICmpInst &Cmp,
// X+C <u C2 -> (X & -C2) == C
// iff C & (C2-1) == 0
// C2 is a power of 2
if (Cmp.getPredicate() == ICmpInst::ICMP_ULT && C->isPowerOf2() &&
(*C2 & (*C - 1)) == 0)
if (Pred == ICmpInst::ICMP_ULT && C->isPowerOf2() && (*C2 & (*C - 1)) == 0)
return new ICmpInst(ICmpInst::ICMP_EQ, Builder->CreateAnd(X, -(*C)),
ConstantExpr::getNeg(cast<Constant>(Y)));
// X+C >u C2 -> (X & ~C2) != C
// iff C & C2 == 0
// C2+1 is a power of 2
if (Cmp.getPredicate() == ICmpInst::ICMP_UGT && (*C + 1).isPowerOf2() &&
(*C2 & *C) == 0)
if (Pred == ICmpInst::ICMP_UGT && (*C + 1).isPowerOf2() && (*C2 & *C) == 0)
return new ICmpInst(ICmpInst::ICMP_NE, Builder->CreateAnd(X, ~(*C)),
ConstantExpr::getNeg(cast<Constant>(Y)));