[PATCH] D53919: [X86] Don't allow illegal vector types to return by direct value on x86-64.

[H.J Lu via Phabricator via cfe-commits]

hjl.tools added a comment.

In https://reviews.llvm.org/D53919#1282734, @efriedma wrote:

> Whatever you call it, the question remains; what specification and/or compiler are we trying to be compatible with?


The ABI before AVX was introduced.


Repository:
  rC Clang

https://reviews.llvm.org/D53919