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09d6a9040c
For each array index that is in the form of zext(a), convert it to sext(a) if we can prove zext(a) <= max signed value of typeof(a). The conversion helps to split zext(x + y) into sext(x) + sext(y). Reviewed in http://reviews.llvm.org/D4060 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210444 91177308-0d34-0410-b5e6-96231b3b80d8 |
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