https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
--- Comment #11 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Tue Nov 24 09:31:57 2015
New Revision: 230795
URL: https://gcc.gnu.org/viewcvs?rev=230795=gcc=rev
Log:
[RTL-ree] PR rtl-optimization/68194: Restrict copy instruction in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
--- Comment #13 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Tue Nov 24 14:27:51 2015
New Revision: 230813
URL: https://gcc.gnu.org/viewcvs?rev=230813=gcc=rev
Log:
[RTL-ree] PR rtl-optimization/68194: Restrict copy instruction in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
--- Comment #12 from ktkachov at gcc dot gnu.org ---
Author: ktkachov
Date: Tue Nov 24 14:24:24 2015
New Revision: 230812
URL: https://gcc.gnu.org/viewcvs?rev=230812=gcc=rev
Log:
[RTL-ree] PR rtl-optimization/68194: Restrict copy instruction in
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
Jeffrey A. Law changed:
What|Removed |Added
Status|NEW |RESOLVED
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
Richard Biener changed:
What|Removed |Added
Keywords||wrong-code
Priority|P3
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
--- Comment #9 from Jakub Jelinek ---
(In reply to ktkachov from comment #8)
> The above testcase should be adjusted a bit for targets that have different
> char signedness than x86:
> int a, b, c = 1, d = 1, e;
>
> __attribute__((noinline,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
--- Comment #8 from ktkachov at gcc dot gnu.org ---
The above testcase should be adjusted a bit for targets that have different
char signedness than x86:
int a, b, c = 1, d = 1, e;
__attribute__((noinline, noclone)) int
foo (void)
{
asm
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
Jakub Jelinek changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Last reconfirmed|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
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=68328
--- Comment #7 from Jakub Jelinek ---
In insn 70 actually set eax to edx rather than ebx, I'd suppose it would work
correctly.
Better testcase that fails reliably:
int a, b, c = 1, d = 1, e;
__attribute__((noinline, noclone)) int
foo (void)
{
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
Jakub Jelinek changed:
What|Removed |Added
CC||law at gcc dot gnu.org
--- Comment #5
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
--- Comment #3 from Mikael Pettersson ---
I'm on Fedora 20 / x86_64 (Ivy Bridge i7-3770K) w/ the 4.3 Linux kernel. I've
tried various combinations of bootstrap compiler (system gcc-4.8.3 or my own
gcc-4.9.3 + patches), support libraries (system
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
--- Comment #2 from Zhendong Su ---
(In reply to Mikael Pettersson from comment #1)
> I can't reproduce on x86_64-linux with ether gcc-6 r230377, gcc-5 r230369,
> or gcc-4.9 r230368.
Mikael, not sure why you can't reproduce the miscompilation.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
Mikael Pettersson changed:
What|Removed |Added
CC||mikpelinux at gmail dot com
---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328
Richard Biener changed:
What|Removed |Added
Known to work||4.8.5
Target Milestone|---
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