[LoopIdiomRecognize] Don't create an IRBuilder just to call getTrue/getFalse.
[LoopIdiomRecognize] Don't create an IRBuilder just to call getTrue/getFalse.

We can call the methods in ConstantInt directly. We just need a context.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@331542 91177308-0d34-0410-b5e6-96231b3b80d8

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