diff options
Diffstat (limited to 'lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp')
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp b/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp index 9857f6ab5a..54be8ed3fa 100644 --- a/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp +++ b/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp @@ -304,7 +304,7 @@ Value *InstCombiner::SimplifyDemandedUseBits(Value *V, APInt DemandedMask, // If all of the demanded bits are known to be zero on one side or the // other, turn this into an *inclusive* or. - // e.g. (A & C1)^(B & C2) -> (A & C1)|(B & C2) if C1&C2 == 0 + // e.g. (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0 if ((DemandedMask & ~RHSKnownZero & ~LHSKnownZero) == 0) { Instruction *Or = BinaryOperator::CreateOr(I->getOperand(0), I->getOperand(1), @@ -315,7 +315,7 @@ Value *InstCombiner::SimplifyDemandedUseBits(Value *V, APInt DemandedMask, // If all of the demanded bits on one side are known, and all of the set // bits on that side are also known to be set on the other side, turn this // into an AND, as we know the bits will be cleared. - // e.g. (X | C1) ^ C2 --> (X | C1) & ~C2 if (C1&C2) == C2 + // e.g. (X | C1) ^ C2 --> (X | C1) & ~C2 iff (C1&C2) == C2 if ((DemandedMask & (RHSKnownZero|RHSKnownOne)) == DemandedMask) { // all known if ((RHSKnownOne & LHSKnownOne) == RHSKnownOne) { |