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* [Bug debug/107110] New: failure (length) with -fcompare-debug at -O1 and above
@ 2022-10-01 14:27 zhendong.su at inf dot ethz.ch
2022-10-03 9:22 ` [Bug debug/107110] " marxin at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: zhendong.su at inf dot ethz.ch @ 2022-10-01 14:27 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107110
Bug ID: 107110
Summary: failure (length) with -fcompare-debug at -O1 and above
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: zhendong.su at inf dot ethz.ch
Target Milestone: ---
It appears to be a regression from 10.* and affect 11.* and later.
Compiler Explorer: https://godbolt.org/z/Gvh15c5KE
[529] % 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/13.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--enable-checking=yes --prefix=/local/suz-local/software/local/gcc-trunk
--enable-sanitizers --enable-languages=c,c++ --disable-werror --enable-multilib
--with-system-zlib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 13.0.0 20221001 (experimental) [master r13-3010-g2555071c954] (GCC)
[530] %
[530] % gcctk -O1 -fcompare-debug small.c
gcctk: error: small.c: ‘-fcompare-debug’ failure (length)
[531] %
[531] % cat small.c
int a, b;
void c() {
int d, e = 1, f = 1, g, h = 0;
for (; 1; h++) {
if (d)
f = 0;
if (d)
break;
if (g)
goto L;
g = f;
}
for (; h < 1;)
L:
for (;;) {
int j, k = e;
if (a) {
break;
;
}
e = 0;
while (b <= k)
;
break;
&j;
}
}
int main() {
if (a)
c();
return 0;
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug debug/107110] failure (length) with -fcompare-debug at -O1 and above
2022-10-01 14:27 [Bug debug/107110] New: failure (length) with -fcompare-debug at -O1 and above zhendong.su at inf dot ethz.ch
@ 2022-10-03 9:22 ` marxin at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: marxin at gcc dot gnu.org @ 2022-10-03 9:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107110
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
CC| |marxin at gcc dot gnu.org
Status|UNCONFIRMED |NEW
Last reconfirmed| |2022-10-03
--- Comment #1 from Martin Liška <marxin at gcc dot gnu.org> ---
Started somewhere between r11-4120-g94fd05f1f76faca9 and
r11-4127-g35f258f4bbba7fa0.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-10-01 14:27 [Bug debug/107110] New: failure (length) with -fcompare-debug at -O1 and above zhendong.su at inf dot ethz.ch
2022-10-03 9:22 ` [Bug debug/107110] " marxin at gcc dot gnu.org
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