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[ValueTracking] Tweak a comment slightly

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Hal asked for this change in D11146, but I missed it when I committed originally.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244754 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy 2015-08-12 15:11:43 +00:00
parent e21d8ad575
commit 078921e1cc
1 changed files with 2 additions and 2 deletions
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4
lib/Analysis/ValueTracking.cpp
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@ -3545,7 +3545,7 @@ static SelectPatternResult matchSelectPattern(CmpInst::Predicate Pred,
// returns the RHS.
Ordered = true;
if (LHSSafe)
// LHS is non-NaN, so RHS is NaN.
// LHS is non-NaN, so if RHS is NaN then NaN will be returned.
NaNBehavior = SPNB_RETURNS_NAN;
else if (RHSSafe)
NaNBehavior = SPNB_RETURNS_OTHER;
@ -3557,7 +3557,7 @@ static SelectPatternResult matchSelectPattern(CmpInst::Predicate Pred,
// An unordered comparison will return true when given a NaN, so it
// returns the LHS.
if (LHSSafe)
// LHS is non-NaN.
// LHS is non-NaN, so if RHS is NaN then non-NaN will be returned.
NaNBehavior = SPNB_RETURNS_OTHER;
else if (RHSSafe)
NaNBehavior = SPNB_RETURNS_NAN;