[PATCH] D122963: [X86] Extend the integer parameter if the function isn't local linked

[Emilio Cobos Álvarez via Phabricator via llvm-commits]

emilio added a comment.

In D122963#3457431 <https://reviews.llvm.org/D122963#3457431>, @rnk wrote:

>> gcc: both caller and callee do the zero/sign extension.
>
> The way I read that, GCC and Clang are ABI compatible with each other.

This is not right. GCC doesn't guarantee sign extension on the caller, and it doesn't always do it see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92821 and https://bugs.llvm.org/show_bug.cgi?id=44228 for example.


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https://reviews.llvm.org/D122963