https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Uroš Bizjak changed:
What|Removed |Added
Status|REOPENED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Uroš Bizjak changed:
What|Removed |Added
Status|RESOLVED|REOPENED
Resolution|FIXED
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Roger Sayle changed:
What|Removed |Added
CC||roger at nextmovesoftware dot
com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #15 from Morwenn ---
That was insanely fast, thanks a lot! :)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Jakub Jelinek changed:
What|Removed |Added
Status|ASSIGNED|RESOLVED
Resolution|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #13 from Jakub Jelinek ---
Author: jakub
Date: Thu Oct 19 08:37:04 2017
New Revision: 253884
URL: https://gcc.gnu.org/viewcvs?rev=253884=gcc=rev
Log:
PR target/82580
* config/i386/i386.md (setcc + movzbl to xor +
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #12 from uros at gcc dot gnu.org ---
Author: uros
Date: Wed Oct 18 20:19:05 2017
New Revision: 253867
URL: https://gcc.gnu.org/viewcvs?rev=253867=gcc=rev
Log:
PR target/82580
* config/i386/i386-modes.def (CCGZ): New
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Uroš Bizjak changed:
What|Removed |Added
Attachment #42393|0 |1
is obsolete|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #10 from Jakub Jelinek ---
BTW, perhaps powerpc64, aarch64 or other targets could benefit from similar
approach. Shall we clone this PR for those?
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #9 from Jakub Jelinek ---
Created attachment 42394
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42394=edit
gcc8-pr82580-peephole2.patch
Untested incremental patch with the 2 peepholes.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #8 from Jakub Jelinek ---
The fact that flags is live is the reason why the
(define_peephole2
[(parallel [(set (reg FLAGS_REG) (match_operand 0))
(match_operand 4)])
(set (match_operand:QI 1 "register_operand")
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #7 from Uroš Bizjak ---
(In reply to Jakub Jelinek from comment #6)
> i.e. for the flags we first clear %eax and then setX %al, but for f2
> cmpq%rdi, %rdx
> sbbq%rsi, %rcx
> setb%al
>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #6 from Jakub Jelinek ---
Nice. I wonder about one further thing.
With your patch, we generate e.g. in f0:
xorq%rdx, %rdi
xorq%rcx, %rsi
xorl%eax, %eax
orq %rsi, %rdi
sete
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Uroš Bizjak changed:
What|Removed |Added
Assignee|uros at gcc dot gnu.org|ubizjak at gmail dot com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Jakub Jelinek changed:
What|Removed |Added
Assignee|jakub at gcc dot gnu.org |uros at gcc dot gnu.org
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #3 from Uroš Bizjak ---
Created attachment 42393
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42393=edit
Prototype patch
Attached patch generates:
foobar:
cmpq%rdx, %rdi
sbbq%rcx, %rsi
setb
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
--- Comment #2 from Uroš Bizjak ---
(In reply to Jakub Jelinek from comment #1)
> I'll have a look.
Oh, I already have a patch...
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82580
Jakub Jelinek changed:
What|Removed |Added
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed|
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