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Fix comment.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128745 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2011-04-01 22:29:18 +00:00
parent 5337fabdc4
commit 406a650237
1 changed files with 2 additions and 2 deletions
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4
lib/Transforms/InstCombine/InstCombineCasts.cpp
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@ -883,8 +883,8 @@ Instruction *InstCombiner::transformSExtICmp(ICmpInst *ICI, Instruction &CI) {
ICmpInst::Predicate Pred = ICI->getPredicate();
if (ConstantInt *Op1C = dyn_cast<ConstantInt>(Op1)) {
// (x <s 0) ? -1 : 0 -> ashr x, 31 -> all ones if signed
// (x >s -1) ? -1 : 0 -> ashr x, 31 -> all ones if not signed
// (x <s 0) ? -1 : 0 -> ashr x, 31 -> all ones if negative
// (x >s -1) ? -1 : 0 -> not (ashr x, 31) -> all ones if positive
if ((Pred == ICmpInst::ICMP_SLT && Op1C->isZero()) ||
(Pred == ICmpInst::ICMP_SGT && Op1C->isAllOnesValue())) {