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* [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce"
@ 2021-05-11 16:48 zhendong.su at inf dot ethz.ch
2021-05-12 6:54 ` [Bug rtl-optimization/100539] " rguenth at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: zhendong.su at inf dot ethz.ch @ 2021-05-11 16:48 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100539
Bug ID: 100539
Summary: wrong code at -Os and above with "-fno-dce
-fno-inline-small-functions -fno-tree-dce"
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: zhendong.su at inf dot ethz.ch
Target Milestone: ---
[514] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--prefix=/local/suz-local/software/local/gcc-trunk --enable-languages=c,c++
--disable-werror --enable-multilib --with-system-zlib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210511 (experimental) [master revision
15e6b45c9ad:45dc47d4720:cf43636a74a028daf2024b33d1915274a2ff9655] (GCC)
[515] %
[515] % gcctk -Os small.c; ./a.out
[516] %
[516] % gcctk -Os -fno-dce -fno-inline-small-functions -fno-tree-dce small.c
[517] % ./a.out
Segmentation fault
[518] %
[518] % cat small.c
int a, b;
static void c(int *d) {
int e = 0;
for (; a < 1; a++)
e |= (b == *d);
}
int main() {
int g = 0;
c(&g);
return 0;
}
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/100539] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce"
2021-05-11 16:48 [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" zhendong.su at inf dot ethz.ch
@ 2021-05-12 6:54 ` rguenth at gcc dot gnu.org
2021-05-12 9:35 ` [Bug rtl-optimization/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6 marxin at gcc dot gnu.org
2021-05-12 11:40 ` [Bug ipa/100539] " jamborm at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: rguenth at gcc dot gnu.org @ 2021-05-12 6:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100539
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-05-12
Component|tree-optimization |rtl-optimization
Target| |x86_64-*-*
Keywords| |wrong-code
Version|unknown |12.0
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
cmpl %edx, 0
oops. Confirmed.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug rtl-optimization/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6
2021-05-11 16:48 [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" zhendong.su at inf dot ethz.ch
2021-05-12 6:54 ` [Bug rtl-optimization/100539] " rguenth at gcc dot gnu.org
@ 2021-05-12 9:35 ` marxin at gcc dot gnu.org
2021-05-12 11:40 ` [Bug ipa/100539] " jamborm at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: marxin at gcc dot gnu.org @ 2021-05-12 9:35 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100539
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jamborm at gcc dot gnu.org,
| |marxin at gcc dot gnu.org
Summary|wrong code at -Os and above |[10/11/12 Regression] wrong
|with "-fno-dce |code at -Os and above with
|-fno-inline-small-functions |"-fno-dce
|-fno-tree-dce" |-fno-inline-small-functions
| |-fno-tree-dce" since
| |r10-3311-gff6686d2e5f797d6
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> ---
Started likely with r10-3311-gff6686d2e5f797d6.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug ipa/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6
2021-05-11 16:48 [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" zhendong.su at inf dot ethz.ch
2021-05-12 6:54 ` [Bug rtl-optimization/100539] " rguenth at gcc dot gnu.org
2021-05-12 9:35 ` [Bug rtl-optimization/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6 marxin at gcc dot gnu.org
@ 2021-05-12 11:40 ` jamborm at gcc dot gnu.org
2 siblings, 0 replies; 4+ messages in thread
From: jamborm at gcc dot gnu.org @ 2021-05-12 11:40 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100539
Martin Jambor <jamborm at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|rtl-optimization |ipa
Resolution|--- |DUPLICATE
Status|NEW |RESOLVED
--- Comment #3 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Perhaps not surprisingly, it's a dup of PR 93385. The posted patches fix this
testcase too.
*** This bug has been marked as a duplicate of bug 93385 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-05-12 11:40 UTC | newest]
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2021-05-11 16:48 [Bug tree-optimization/100539] New: wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" zhendong.su at inf dot ethz.ch
2021-05-12 6:54 ` [Bug rtl-optimization/100539] " rguenth at gcc dot gnu.org
2021-05-12 9:35 ` [Bug rtl-optimization/100539] [10/11/12 Regression] wrong code at -Os and above with "-fno-dce -fno-inline-small-functions -fno-tree-dce" since r10-3311-gff6686d2e5f797d6 marxin at gcc dot gnu.org
2021-05-12 11:40 ` [Bug ipa/100539] " jamborm at gcc dot gnu.org
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