[Bug rtl-optimization/108774] New: [13 Regression] ICE: in get_equiv, at lra-constraints.cc:534 with -Os -ftrapv -mcmodel=large

[Bug rtl-optimization/108774] New: [13 Regression] ICE: in get_equiv, at lra-constraints.cc:534 with -Os -ftrapv -mcmodel=large

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108774

            Bug ID: 108774
           Summary: [13 Regression] ICE: in get_equiv, at
                    lra-constraints.cc:534 with -Os -ftrapv -mcmodel=large
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu

Created attachment 54455
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54455&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -Os -ftrapv -mcmodel=large testcase.c 
during RTL pass: reload
testcase.c: In function 'foo':
testcase.c:7:1: internal compiler error: in get_equiv, at
lra-constraints.cc:534
    7 | }
      | ^
0x7405ab get_equiv
        /repo/gcc-trunk/gcc/lra-constraints.cc:534
0x1206c92 lra_constraints(bool)
        /repo/gcc-trunk/gcc/lra-constraints.cc:5052
0x11f12c4 lra(_IO_FILE*)
        /repo/gcc-trunk/gcc/lra.cc:2375
0x11a1459 do_reload
        /repo/gcc-trunk/gcc/ira.cc:5960
0x11a1459 execute
        /repo/gcc-trunk/gcc/ira.cc:6146
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r13-5964-20230213153338-g452db716d8d-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/13.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--disable-bootstrap --with-cloog --with-ppl --with-isl
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r13-5964-20230213153338-g452db716d8d-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.0.1 20230213 (experimental) (GCC)

[Bug rtl-optimization/108774] [13 Regression] ICE: in get_equiv, at lra-constraints.cc:534 with -Os -ftrapv -mcmodel=large

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108774

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |13.0
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |vmakarov at gcc dot gnu.org
           Priority|P3                          |P1

[Bug rtl-optimization/108774] [13 Regression] ICE: in get_equiv, at lra-constraints.cc:534 with -Os -ftrapv -mcmodel=large

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108774

--- Comment #1 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
Thank you for reporting this.  I'll try to fix it as soon as possible, today or
tomorrow.

[Bug rtl-optimization/108774] [13 Regression] ICE: in get_equiv, at lra-constraints.cc:534 with -Os -ftrapv -mcmodel=large

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108774

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Vladimir Makarov <vmakarov@gcc.gnu.org>:

https://gcc.gnu.org/g:a33e3dcbd15e73603796e30b5eeec11a0c8bacec

commit r13-5971-ga33e3dcbd15e73603796e30b5eeec11a0c8bacec
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Mon Feb 13 16:05:04 2023 -0500

    RA: Clear reg equiv caller_save_p flag when clearing defined_p flag

    IRA can invalidate initially setup equivalence in setup_reg_equiv.
    Flag caller_saved was not cleared during invalidation although
    init_insns were cleared.  It resulted in segmentation fault in
    get_equiv.  Clearing the flag solves the problem.  For more
    precaution I added clearing the flag in other places too although it
    might be not necessary.

            PR rtl-optimization/108774

    gcc/ChangeLog:

            * ira.cc (ira_update_equiv_info_by_shuffle_insn): Clear equiv
            caller_save_p flag when clearing defined_p flag.
            (setup_reg_equiv): Ditto.
            * lra-constraints.cc (lra_constraints): Ditto.

    gcc/testsuite/ChangeLog:

            * gcc.target/i386/pr108774.c: New.

[Bug rtl-optimization/108774] [13 Regression] ICE: in get_equiv, at lra-constraints.cc:534 with -Os -ftrapv -mcmodel=large

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108774

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.