[PATCH] D45653: [X86] Enable sibling-call optimization for functions returning structs

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> but because in the C calling convention sret argument is cleaned up by a callee, while a non-sret pointer to a struct is cleaned up by a caller

This only applies to 32-bit.  (And even on 32-bit, we could still handle some cases where both the caller and callee are sret, I think.)


https://reviews.llvm.org/D45653