[PATCH] D68626: [Attributor] Use undef for calls with unused arguments.

[Stefan Stipanovic via Phabricator via llvm-commits]

sstefan1 added a comment.

I have no problem with this going in as is. I have one question though. Why do we have to wait for ValueSimplify to finish? Wouldn't it be useful for AAIsDead to have `isDeadArg(Arg)` and then ValueSimplify could use that to decide whether to simplify or not?


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  https://reviews.llvm.org/D68626/new/

https://reviews.llvm.org/D68626