[PATCH] D16837: Disable the vzeroupper insertion pass on PS4

[Yunzhong Gao via llvm-commits]

ygao added a comment.

I definitely remember there was some concern (or incident?) over correctness,
and it involves some library. Unfortunately I cannot recall the details.

In this patch I was setting the feature bit on btver2, but it probably also
applies to bdver[2..4].


http://reviews.llvm.org/D16837