[Bug target/90993] simd integer division not optimized

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90993

--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Note that this is only valid with -fno-trapping-math (since integer 
division is not permitted to raise the "inexact" exception flag).  (With 
AVX-512 there are instruction variants that suppress exceptions and so 
could be used even with -ftrapping-math.)