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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107172] [13 Regression] wrong code with "-O1 -ftree-vrp" on x86_64-linux-gnu
Date: Thu, 06 Oct 2022 18:02:55 +0000 [thread overview]
Message-ID: <bug-107172-4-mGIOlRG1B7@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-107172-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107172
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|wrong code with "-O1 |[13 Regression] wrong code
|-ftree-vrp" on |with "-O1 -ftree-vrp" on
|x86_64-linux-gnu |x86_64-linux-gnu
Status|UNCONFIRMED |NEW
Last reconfirmed| |2022-10-06
Ever confirmed|0 |1
Target Milestone|--- |13.0
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed. Reduced a little bit more:
```
int a, c, d;
int main() {
long e = 1;
int f = a = 1;
L1:
if (a)
a = 2;
int h = e = ~e;
c = -1;
if (e >= a)
goto L2;
if (-1 > a)
goto L1;
if (a)
f = -1;
L2:
d = (-f + d) & h;
if (d)
__builtin_abort();
return 0;
}
```
Note the store for c is important there. I suspect otherwise the load to e is
figured out and does the correct thing.
next prev parent reply other threads:[~2022-10-06 18:02 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-06 17:51 [Bug tree-optimization/107172] New: " zhendong.su at inf dot ethz.ch
2022-10-06 18:02 ` pinskia at gcc dot gnu.org [this message]
2022-10-06 18:46 ` [Bug tree-optimization/107172] [13 Regression] wrong code with "-O1 -ftree-vrp" on x86_64-linux-gnu since r13-1268-g8c99e307b20c502e marxin at gcc dot gnu.org
2022-10-07 7:21 ` rguenth at gcc dot gnu.org
2022-10-07 12:17 ` aldyh at gcc dot gnu.org
2022-10-07 21:04 ` [Bug target/107172] " hjl.tools at gmail dot com
2022-10-07 22:20 ` hjl.tools at gmail dot com
2022-10-09 21:51 ` roger at nextmovesoftware dot com
2022-10-10 18:32 ` segher at gcc dot gnu.org
2022-10-10 18:34 ` segher at gcc dot gnu.org
2022-10-10 19:16 ` hjl.tools at gmail dot com
2022-10-10 20:55 ` segher at gcc dot gnu.org
2022-10-11 0:10 ` hjl.tools at gmail dot com
2022-10-11 16:16 ` segher at gcc dot gnu.org
2022-10-11 17:16 ` hjl.tools at gmail dot com
2022-10-11 18:05 ` segher at gcc dot gnu.org
2022-10-11 19:49 ` roger at nextmovesoftware dot com
2022-10-11 20:26 ` segher at gcc dot gnu.org
2022-10-11 22:30 ` hjl.tools at gmail dot com
2022-10-11 22:38 ` hjl.tools at gmail dot com
2022-10-12 7:17 ` crazylht at gmail dot com
2022-10-12 7:25 ` crazylht at gmail dot com
2022-10-12 8:11 ` segher at gcc dot gnu.org
2022-10-12 17:50 ` hjl.tools at gmail dot com
2022-10-13 3:38 ` crazylht at gmail dot com
2022-10-13 8:14 ` ubizjak at gmail dot com
2022-10-13 12:31 ` crazylht at gmail dot com
2022-10-13 16:54 ` hjl.tools at gmail dot com
2022-10-13 17:49 ` hjl.tools at gmail dot com
2022-10-13 22:07 ` segher at gcc dot gnu.org
2022-10-13 22:12 ` segher at gcc dot gnu.org
2022-10-13 22:20 ` segher at gcc dot gnu.org
2022-10-13 22:23 ` hjl.tools at gmail dot com
2022-10-13 22:34 ` hjl.tools at gmail dot com
2022-10-15 14:53 ` segher at gcc dot gnu.org
2022-10-17 3:28 ` crazylht at gmail dot com
2022-10-17 7:48 ` rguenth at gcc dot gnu.org
2022-10-17 7:55 ` rguenth at gcc dot gnu.org
2022-10-17 15:59 ` hjl.tools at gmail dot com
2022-10-17 22:01 ` segher at gcc dot gnu.org
2022-10-18 0:19 ` hjl.tools at gmail dot com
2022-10-18 14:44 ` segher at gcc dot gnu.org
2022-10-18 19:54 ` hjl.tools at gmail dot com
2022-10-18 20:14 ` segher at gcc dot gnu.org
2022-10-20 17:25 ` pinskia at gcc dot gnu.org
2022-10-20 19:03 ` hjl.tools at gmail dot com
2022-10-22 21:14 ` segher at gcc dot gnu.org
2022-10-27 18:42 ` cvs-commit at gcc dot gnu.org
2022-10-28 9:11 ` roger at nextmovesoftware dot com
2022-10-28 15:48 ` hjl.tools at gmail dot com
2022-11-30 17:33 ` jakub at gcc dot gnu.org
2022-11-30 21:52 ` hjl.tools at gmail dot com
2023-05-30 13:44 ` cvs-commit at gcc dot gnu.org
2023-07-27 14:47 ` shaohua.li at inf dot ethz.ch
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