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* [r12-4397 Regression] FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3 on Linux/x86_64
@ 2021-10-14 19:16 sunil.k.pandey
2021-10-15 9:00 ` Martin Liška
0 siblings, 1 reply; 3+ messages in thread
From: sunil.k.pandey @ 2021-10-14 19:16 UTC (permalink / raw)
To: gcc-patches, gcc-regression, mliska
On Linux/x86_64,
4cb52980e5d5fb64a393d385923da1b51ab34606 is the first bad commit
commit 4cb52980e5d5fb64a393d385923da1b51ab34606
Author: Martin Liska <mliska@suse.cz>
Date: Tue Oct 12 14:31:50 2021 +0200
Eliminate AUTODETECT_VALUE usage in options.
caused
FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3
with GCC configured with
../../gcc/configure --prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-4397/usr --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl --enable-libmpx x86_64-linux --disable-bootstrap
To reproduce:
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="guality.exp=gcc.dg/guality/pr54200.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="guality.exp=gcc.dg/guality/pr54200.c --target_board='unix{-m64\ -march=cascadelake}'"
(Please do not reply to this email, for question about this report, contact me at skpgkp2 at gmail dot com)
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [r12-4397 Regression] FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3 on Linux/x86_64
2021-10-14 19:16 [r12-4397 Regression] FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3 on Linux/x86_64 sunil.k.pandey
@ 2021-10-15 9:00 ` Martin Liška
2021-10-15 19:02 ` H.J. Lu
0 siblings, 1 reply; 3+ messages in thread
From: Martin Liška @ 2021-10-15 9:00 UTC (permalink / raw)
To: sunil.k.pandey, gcc-patches, gcc-regression
On 10/14/21 21:16, sunil.k.pandey wrote:
> FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3
Hello.
I've just verified the assembly is identical before and after the revision.
So it must be a false positive.
Cheers,
Martin
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [r12-4397 Regression] FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3 on Linux/x86_64
2021-10-15 9:00 ` Martin Liška
@ 2021-10-15 19:02 ` H.J. Lu
0 siblings, 0 replies; 3+ messages in thread
From: H.J. Lu @ 2021-10-15 19:02 UTC (permalink / raw)
To: Martin Liška; +Cc: sunil.k.pandey, GCC Patches, gcc-regression
On Fri, Oct 15, 2021 at 2:00 AM Martin Liška <mliska@suse.cz> wrote:
>
> On 10/14/21 21:16, sunil.k.pandey wrote:
> > FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3
>
> Hello.
>
> I've just verified the assembly is identical before and after the revision.
> So it must be a false positive.
>
> Cheers,
> Martin
I saw
Breakpoint 1, foo (z=3, x=<optimized out>, b=1) at
/export/gnu/import/git/gitlab/x86-gcc/gcc/testsuite/gcc.dg/guality/pr54200.c:20^M
20 return a; /* { dg-final { gdb-test . "z" "3" { xfail {
aarch64*-*-* && { no-opts "-O0" "-Og" } } } } } */^M
$1 = [uninitialized] 3^M
$2 = 3^M
A debugging session is active.^M
^M
Inferior 1 [process 4053185] will be killed.^M
^M
Quit anyway? (y or n) [answered Y; input not from terminal]^M
[uninitialized] 3 != 3
FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3
I don't know where [uninitialized] came from. I can't reproduce it
when I run gdb by hand.
--
H.J.
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-10-15 19:03 UTC | newest]
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2021-10-14 19:16 [r12-4397 Regression] FAIL: gcc.dg/guality/pr54200.c -Og -DPREVENT_OPTIMIZATION line 20 z == 3 on Linux/x86_64 sunil.k.pandey
2021-10-15 9:00 ` Martin Liška
2021-10-15 19:02 ` H.J. Lu
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