This showed up as dynamic icount regression in SPEC 531.deepsjeng with upstream
gcc (vs. gcc 12.2). gcc was resorting to synthetic multiply using shift+add(s)
even when multiply had clear cost benefit.
|000133b8 :
| 133b8: srl a3,a1,s6
| 133bc: and a3,a3,s5
| 133c0:
Committed 2 weeks ago but apparently I didn't send mail to say that,
thanks Vineet.
On Thu, Mar 2, 2023 at 3:56 AM Philipp Tomsich wrote:
>
> On Wed, 1 Mar 2023 at 20:53, Vineet Gupta wrote:
> >
> > This showed up as dynamic icount regression in SPEC 531.deepsjeng with
> > upstream
> > gcc (vs.
On Wed, 1 Mar 2023 at 20:53, Vineet Gupta wrote:
>
> This showed up as dynamic icount regression in SPEC 531.deepsjeng with
> upstream
> gcc (vs. gcc 12.2). gcc was resorting to synthetic multiply using shift+add(s)
> even when multiply had clear cost benefit.
>
> |000133b8 .constprop.0]
