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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145470 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chad Rosier 2011-11-30 01:59:59 +00:00
parent 683e47b1dd
commit caebb1e00b
1 changed files with 1 additions and 3 deletions
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4
lib/Transforms/InstCombine/InstCombineCasts.cpp
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@ -529,9 +529,7 @@ Instruction *InstCombiner::transformZExtICmp(ICmpInst *ICI, Instruction &CI,
return ReplaceInstUsesWith(CI, In);
}
// zext (X == 0) to i32 --> X^1 iff X has only the low bit set.
// zext (X == 0) to i32 --> (X>>1)^1 iff X has only the 2nd bit set.
// zext (X == 1) to i32 --> X iff X has only the low bit set.