[PATCH] D74141: [InstCombine] Simplify a umul overflow check to a != 0 && b != 0.

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

> Code like this is generated by code using __builtin_mul_overflow with negative integer constants

I'm missing something here, why does clang generate this kind of code? I would have thought that __builtin_mul_overflow maps pretty directly the intrinsic.


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https://reviews.llvm.org/D74141