[Bug rtl-optimization/113546] New: aarch64: bootstrap-debug-lean broken with -fcompare-debug failure

[Bug rtl-optimization/113546] New: aarch64: bootstrap-debug-lean broken with -fcompare-debug failure

[acoplan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113546

            Bug ID: 113546
           Summary: aarch64: bootstrap-debug-lean broken with
                    -fcompare-debug failure
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: acoplan at gcc dot gnu.org
  Target Milestone: ---

I tried a bootstrap --with-build-config=bootstrap-debug-lean on aarch64 and it
failed with an -fcompare-debug failure building libiberty/regex.c:

make[3]: Entering directory '/data/ajc/toolchain/builds/bstrap-lean/libiberty'
if [ x"-fPIC" != x ]; then \
  /home/alecop01/toolchain/builds/bstrap-lean/./prev-gcc/xgcc
-B/home/alecop01/toolchain/builds/bstrap-lean/./prev-gcc/
-B/home/alecop01/toolchain/builds/bstrap-lean/aarch64-unknown-linux-gnu/bin/
-B/home/alecop01/toolchain/builds/bstrap-lean/aarch64-unknown-linux-gnu/bin/
-B/home/alecop01/toolchain/builds/bstrap-lean/aarch64-unknown-linux-gnu/lib/
-isystem
/home/alecop01/toolchain/builds/bstrap-lean/aarch64-unknown-linux-gnu/include
-isystem
/home/alecop01/toolchain/builds/bstrap-lean/aarch64-unknown-linux-gnu/sys-include
  -fchecking=1 -c -DHAVE_CONFIG_H -g -O2 -fchecking=1 -fcompare-debug  -I.
-I/home/alecop01/toolchain/src/gcc/libiberty/../include  -W -Wall
-Wwrite-strings -Wc++-compat -Wstrict-prototypes -Wshadow=local -pedantic 
-D_GNU_SOURCE  -fPIC /home/alecop01/toolchain/src/gcc/libiberty/regex.c -o
pic/regex.o; \
else true; fi
xgcc: error: /home/alecop01/toolchain/src/gcc/libiberty/regex.c:
‘-fcompare-debug’ failure
Makefile:1219: recipe for target 'regex.o' failed
make[3]: *** [regex.o] Error 1
make[3]: Leaving directory '/data/ajc/toolchain/builds/bstrap-lean/libiberty'
Makefile:11725: recipe for target 'all-stage3-libiberty' failed
make[2]: *** [all-stage3-libiberty] Error 2
make[2]: Leaving directory '/data/ajc/toolchain/builds/bstrap-lean'
Makefile:26292: recipe for target 'stage3-bubble' failed
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory '/data/ajc/toolchain/builds/bstrap-lean'
Makefile:1099: recipe for target 'all' failed
make: *** [all] Error 2

Here is a reduced testcase for that:

$ cat t.c
int x;
void f() {
fail:
  switch (x) { case 0: goto fail;; }
}
$ ./xgcc -B . -c t.c -fcompare-debug -O -S -o /dev/null
xgcc: error: t.c: ‘-fcompare-debug’ failure

[Bug rtl-optimization/113546] [13/14 Regression] aarch64: bootstrap-debug-lean broken with -fcompare-debug failure since r13-2921-gf1adf45b17f7f1

[acoplan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113546

Alex Coplan <acoplan at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |compare-debug-failure
            Summary|aarch64:                    |[13/14 Regression] aarch64:
                   |bootstrap-debug-lean broken |bootstrap-debug-lean broken
                   |with -fcompare-debug        |with -fcompare-debug
                   |failure                     |failure since
                   |                            |r13-2921-gf1adf45b17f7f1
             Target|                            |aarch64-*-*

--- Comment #1 from Alex Coplan <acoplan at gcc dot gnu.org> ---
The reduced testcase started failing with
r13-2921-gf1adf45b17f7f1ede463524d80032bb2ec866ead:

commit f1adf45b17f7f1ede463524d80032bb2ec866ead
Author: Eugene Rozenfeld <erozen@microsoft.com>
Date:   Thu Apr 21 23:42:15 2022

    Add instruction level discriminator support.

    This is the first in a series of patches to enable discriminator support
    in AutoFDO.

[Bug rtl-optimization/113546] [13/14 Regression] aarch64: bootstrap-debug-lean broken with -fcompare-debug failure since r13-2921-gf1adf45b17f7f1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113546

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=107169

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Alex Coplan from comment #1)
> The reduced testcase started failing with
> r13-2921-gf1adf45b17f7f1ede463524d80032bb2ec866ead:
> 
> commit f1adf45b17f7f1ede463524d80032bb2ec866ead
> Author: Eugene Rozenfeld <erozen@microsoft.com>
> Date:   Thu Apr 21 23:42:15 2022
> 
>     Add instruction level discriminator support.
> 
>     This is the first in a series of patches to enable discriminator support
>     in AutoFDO.

That means this is most likely a dup of bug 107169.

[Bug rtl-optimization/113546] [13/14 Regression] aarch64: bootstrap-debug-lean broken with -fcompare-debug failure since r13-2921-gf1adf45b17f7f1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113546

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=100733

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #2)
> That means this is most likely a dup of bug 107169.

And PR 100733.

[Bug rtl-optimization/113546] [13/14 Regression] aarch64: bootstrap-debug-lean broken with -fcompare-debug failure since r13-2921-gf1adf45b17f7f1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113546

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note the reduced testcase might NOT be a representative of the original issue
though ...

[Bug rtl-optimization/113546] [13/14 Regression] aarch64: bootstrap-debug-lean broken with -fcompare-debug failure since r13-2921-gf1adf45b17f7f1

[acoplan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113546

--- Comment #5 from Alex Coplan <acoplan at gcc dot gnu.org> ---
FWIW the original preprocessed testcase (regex.i) also started failing with the
same commit (as the reduced testcase).

[Bug rtl-optimization/113546] [13/14 Regression] aarch64: bootstrap-debug-lean broken with -fcompare-debug failure since r13-2921-gf1adf45b17f7f1

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113546

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.3

[Bug rtl-optimization/113546] [13/14/15 Regression] aarch64: bootstrap-debug-lean broken with -fcompare-debug failure since r13-2921-gf1adf45b17f7f1

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113546

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|13.3                        |13.4

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 13.3 is being released, retargeting bugs to GCC 13.4.