https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93089
Bug ID: 93089
Summary: Force mprefer-vector-width=512 in 'e' simd clones
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jakub at gcc dot gnu.org
Target Milestone: ---
The 'e' mangled simd clones that use 512-bit arguments/return value won't be
really called if the caller isn't preferring 512-bit vectors, so it seems much
better not to emit terrible code in those functions by trying to use only
256-bit vectors in there, which isn't fully possible anyway, as it needs to
extract the arguments from 512-bit vectors and store the result there too.
Unfortunately, we don't even allow prefer-vector-width= in target attribute.
