https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #13 from Jakub Jelinek ---
(In reply to ktkachov from comment #12)
> r223115 caused a code quality regression that I'm seeing on aarch64 with PR
> 68381.
>
> We have
> int
> foo (unsigned short x, unsigned short y)
> {
> int r;
>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
ktkachov at gcc dot gnu.org changed:
What|Removed |Added
CC||ktkachov at gcc dot gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
Jakub Jelinek changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #10 from Jakub Jelinek ---
Author: jakub
Date: Wed May 13 08:09:01 2015
New Revision: 223116
URL: https://gcc.gnu.org/viewcvs?rev=223116&root=gcc&view=rev
Log:
PR target/66112
* config/i386/i386.md (mulv4, umulv4, *um
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #9 from Jakub Jelinek ---
Author: jakub
Date: Wed May 13 08:07:58 2015
New Revision: 223115
URL: https://gcc.gnu.org/viewcvs?rev=223115&root=gcc&view=rev
Log:
PR target/66112
* internal-fn.c (get_min_precision): Use U
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #8 from Uroš Bizjak ---
(In reply to Jakub Jelinek from comment #5)
> Created attachment 35524 [details]
> gcc6-pr66112-2.patch
>
> And i386 mulvhi4 and umulvhi4 support. For umulvhi4, I haven't found
> corresponding i386.md instruc
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #7 from Jeremy ---
Comment on attachment 35522
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35522
gcc5-pr66112.patch
Done, PR66120
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #6 from Jakub Jelinek ---
As for ARM, please file a separate enhancement request. The generic code has
the means for backends to provide better patterns, but arm doesn't use them
(only i386.md uses them right now), so arm maintainers
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #5 from Jakub Jelinek ---
Created attachment 35524
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35524&action=edit
gcc6-pr66112-2.patch
And i386 mulvhi4 and umulvhi4 support. For umulvhi4, I haven't found
corresponding i386.m
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
Jakub Jelinek changed:
What|Removed |Added
Attachment #35522|0 |1
is obsolete|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #3 from Jeremy ---
Related FYI,
Few instructions on ARM set the overflow flag. Two that do are 32-bit add and
subtract. For these two, GCC could just emit "adds" followed by "bvs"
Instead it produces:-
bl atoi@
add r1
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #2 from Uroš Bizjak ---
(In reply to Jakub Jelinek from comment #1)
> Created attachment 35522 [details]
> gcc5-pr66112.patch
>
> Supposedly just using SWI248 instead of SWI48 iterator should fix this,
> though not sure about all the
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #1
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