[PATCH] D154915: [ARM][AArch64] Add ARM specific builtin for clz that is not undefined for 0 in ubsan.

[Tomas Matheson via Phabricator via cfe-commits]

tmatheson added a comment.

I would prefer the simplicity of adding a check in the intrinsic itself, rather than adding the target-specific builtins. Slightly worse codegen at -O0 doesn't matter imho. However I don't feel very strongly about it, so if others are happy with this then LGTM.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D154915/new/

https://reviews.llvm.org/D154915