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* [Bug tree-optimization/63381] New: Wrong constant folding
@ 2014-09-26 9:47 ishiura-compiler at ml dot kwansei.ac.jp
2014-10-02 14:56 ` [Bug tree-optimization/63381] " mpolacek at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: ishiura-compiler at ml dot kwansei.ac.jp @ 2014-09-26 9:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63381
Bug ID: 63381
Summary: Wrong constant folding
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: ishiura-compiler at ml dot kwansei.ac.jp
GCC 5.0.0 for x86_64 miscompiles the following code.
$ cat test.c
int a = 0, b = 0, c = 0, d, e;
int
main (void)
{
d = ((20 % (1 != b)) && c) + 2147483647;
e = 20 % (a >= 0);
return 0;
}
$ x86_64-unknown-linux-gnu-gcc-5.0.0 test.c -Os
$ ./a.out
Floating point exception (core dumped)
$ x86_64-unknown-linux-gnu-gcc-5.0.0 -v
Using built-in specs.
COLLECT_GCC=x86_64-unknown-linux-gnu-gcc-5.0.0
COLLECT_LTO_WRAPPER=/usr/local/x86_64-tools/gcc-
5.0.0/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/orange3/gcc-master/configure --
prefix=/usr/local/x86_64-tools/gcc-5.0.0/ --with-gmp=/usr/local/gmp-
5.1.1/ --with-mpfr=/usr/local/mpfr-3.1.2/ --with-mpc=/usr/local/mpc-
1.0.1/ --disable-multilib --disable-nls --enable-languages=c
Thread model: posix
gcc version 5.0.0 20140922 (experimental) (GCC)
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug tree-optimization/63381] Wrong constant folding 2014-09-26 9:47 [Bug tree-optimization/63381] New: Wrong constant folding ishiura-compiler at ml dot kwansei.ac.jp @ 2014-10-02 14:56 ` mpolacek at gcc dot gnu.org 2014-10-02 15:00 ` [Bug tree-optimization/63381] [5 Regression] " mpolacek at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: mpolacek at gcc dot gnu.org @ 2014-10-02 14:56 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63381 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2014-10-02 CC| |mpolacek at gcc dot gnu.org Target Milestone|--- |5.0 Ever confirmed|0 |1 --- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Works with -fno-tree-vrp. Seems to have started with r211904. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/63381] [5 Regression] Wrong constant folding 2014-09-26 9:47 [Bug tree-optimization/63381] New: Wrong constant folding ishiura-compiler at ml dot kwansei.ac.jp 2014-10-02 14:56 ` [Bug tree-optimization/63381] " mpolacek at gcc dot gnu.org @ 2014-10-02 15:00 ` mpolacek at gcc dot gnu.org 2014-10-02 15:07 ` mpolacek at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: mpolacek at gcc dot gnu.org @ 2014-10-02 15:00 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63381 --- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Ugh, ignore Comment 1, that was for PR63380. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/63381] [5 Regression] Wrong constant folding 2014-09-26 9:47 [Bug tree-optimization/63381] New: Wrong constant folding ishiura-compiler at ml dot kwansei.ac.jp 2014-10-02 14:56 ` [Bug tree-optimization/63381] " mpolacek at gcc dot gnu.org 2014-10-02 15:00 ` [Bug tree-optimization/63381] [5 Regression] " mpolacek at gcc dot gnu.org @ 2014-10-02 15:07 ` mpolacek at gcc dot gnu.org 2014-10-06 12:05 ` rguenth at gcc dot gnu.org 2014-10-09 8:18 ` rguenth at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: mpolacek at gcc dot gnu.org @ 2014-10-02 15:07 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63381 --- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Actually, Comment 1 applies here as well, so these two could be dups. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/63381] [5 Regression] Wrong constant folding 2014-09-26 9:47 [Bug tree-optimization/63381] New: Wrong constant folding ishiura-compiler at ml dot kwansei.ac.jp ` (2 preceding siblings ...) 2014-10-02 15:07 ` mpolacek at gcc dot gnu.org @ 2014-10-06 12:05 ` rguenth at gcc dot gnu.org 2014-10-09 8:18 ` rguenth at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu.org @ 2014-10-06 12:05 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63381 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot gnu.org --- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> --- Mine. ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug tree-optimization/63381] [5 Regression] Wrong constant folding 2014-09-26 9:47 [Bug tree-optimization/63381] New: Wrong constant folding ishiura-compiler at ml dot kwansei.ac.jp ` (3 preceding siblings ...) 2014-10-06 12:05 ` rguenth at gcc dot gnu.org @ 2014-10-09 8:18 ` rguenth at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: rguenth at gcc dot gnu.org @ 2014-10-09 8:18 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63381 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |DUPLICATE --- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- Patch for 63380 fixes this as well. *** This bug has been marked as a duplicate of bug 63380 *** ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-10-09 8:18 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2014-09-26 9:47 [Bug tree-optimization/63381] New: Wrong constant folding ishiura-compiler at ml dot kwansei.ac.jp 2014-10-02 14:56 ` [Bug tree-optimization/63381] " mpolacek at gcc dot gnu.org 2014-10-02 15:00 ` [Bug tree-optimization/63381] [5 Regression] " mpolacek at gcc dot gnu.org 2014-10-02 15:07 ` mpolacek at gcc dot gnu.org 2014-10-06 12:05 ` rguenth at gcc dot gnu.org 2014-10-09 8:18 ` rguenth at gcc dot gnu.org
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