[PATCH] D41633: [InstCombine] Remove unneeded VarArg casts.

[Reid Kleckner via Phabricator via llvm-commits]

rnk added a comment.

@rjmccall, does this cause problems on Darwin? I seem to recall that there are some ABIs (AArch64 Darwin) where arguments in the varargs pack are passed differently from the ones that are prototyped.

If that is a problem, do you think we can permit this simplification if we see a non-interposable definition of the callee? In this case, instcombine should "know" the true prototype of the callee and should be adjusting things so the types match.


https://reviews.llvm.org/D41633