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* [Bug c/65088] New: Does GCC has load/store widening phase?
@ 2015-02-17 9:14 m.zakirov at samsung dot com
2015-02-20 8:41 ` [Bug c/65088] " pinskia at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: m.zakirov at samsung dot com @ 2015-02-17 9:14 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65088
Bug ID: 65088
Summary: Does GCC has load/store widening phase?
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: m.zakirov at samsung dot com
This example says me that it doesn't.
$ cat t2.c
int a[2];
int b[2];
int main ()
{
b[0] = a[0];
b[1] = a[1];
return 0;
}
$ gcc t2.c -O3 -S
$ cat t2.s
...
main:
.LFB0:
.cfi_startproc
movl a(%rip), %eax
movl %eax, b(%rip)
movl a+4(%rip), %eax
movl %eax, b+4(%rip)
xorl %eax, %eax
ret
.cfi_endproc
gcc version is:
commit 71464ecd3a554b889c3bbc53d8874fc532bdf953
Author: trippels <trippels@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon Jan 12 07:53:10 2015 +0000
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug c/65088] Does GCC has load/store widening phase? 2015-02-17 9:14 [Bug c/65088] New: Does GCC has load/store widening phase? m.zakirov at samsung dot com @ 2015-02-20 8:41 ` pinskia at gcc dot gnu.org 2015-02-26 19:45 ` mpolacek at gcc dot gnu.org 2015-02-27 8:27 ` m.zakirov at samsung dot com 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2015-02-20 8:41 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65088 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- See bug 23684. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/65088] Does GCC has load/store widening phase? 2015-02-17 9:14 [Bug c/65088] New: Does GCC has load/store widening phase? m.zakirov at samsung dot com 2015-02-20 8:41 ` [Bug c/65088] " pinskia at gcc dot gnu.org @ 2015-02-26 19:45 ` mpolacek at gcc dot gnu.org 2015-02-27 8:27 ` m.zakirov at samsung dot com 2 siblings, 0 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-02-26 19:45 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65088 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |mpolacek at gcc dot gnu.org Resolution|--- |INVALID --- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- I think this has been discussed on the gcc mailing list. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/65088] Does GCC has load/store widening phase? 2015-02-17 9:14 [Bug c/65088] New: Does GCC has load/store widening phase? m.zakirov at samsung dot com 2015-02-20 8:41 ` [Bug c/65088] " pinskia at gcc dot gnu.org 2015-02-26 19:45 ` mpolacek at gcc dot gnu.org @ 2015-02-27 8:27 ` m.zakirov at samsung dot com 2 siblings, 0 replies; 4+ messages in thread From: m.zakirov at samsung dot com @ 2015-02-27 8:27 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65088 --- Comment #3 from Marat Zakirov <m.zakirov at samsung dot com> --- > I think this has been discussed on the gcc mailing list Marek could you please share some resuting conclusion at least for x86 platform? Why didn't x86 GCC RTL fold these loads/stores? ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-02-27 6:46 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2015-02-17 9:14 [Bug c/65088] New: Does GCC has load/store widening phase? m.zakirov at samsung dot com 2015-02-20 8:41 ` [Bug c/65088] " pinskia at gcc dot gnu.org 2015-02-26 19:45 ` mpolacek at gcc dot gnu.org 2015-02-27 8:27 ` m.zakirov at samsung dot com
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