[Bug tree-optimization/106249] [13 Regression] ICE in check_loop_closed_ssa_def, at tree-ssa-loop-manip.cc:645 since r13-1450-gd2a898666609452e

["asolokha at gmx dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106249

Arseny Solokha <asolokha at gmx dot com> changed:

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

--- Comment #11 from Arseny Solokha <asolokha at gmx dot com> ---
Actually, testcase from comment 0 still ICEs for me, as well as its slightly
modified version:

subroutine foo()
  implicit none
  integer :: x
  integer :: a(0:1)

10 x = x + 1
20 if ((a(x) .ne. (-1)) .or. (a(x + 1) .ne. (-1))) then
     x = x + 1
     go to 20
  end if

  call undefined()
  go to 10

  return

end subroutine foo

% gfortran-13 -O1 -fpeel-loops -funreachable-traps -c comment0.f
during GIMPLE pass: cunroll
comment0.f:1:23:

    1 |       SUBROUTINE YYPARS(LSTACK,YYPS,YYSTAT)
      |                       ^
internal compiler error: in check_loop_closed_ssa_def, at
tree-ssa-loop-manip.cc:645
0x7804b7 check_loop_closed_ssa_def
       
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230205/work/gcc-13-20230205/gcc/tree-ssa-loop-manip.cc:645
0x10fc384 check_loop_closed_ssa_bb
       
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230205/work/gcc-13-20230205/gcc/tree-ssa-loop-manip.cc:659
0x10fd746 verify_loop_closed_ssa(bool, loop*)
       
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230205/work/gcc-13-20230205/gcc/tree-ssa-loop-manip.cc:695
0x10fd746 verify_loop_closed_ssa(bool, loop*)
       
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230205/work/gcc-13-20230205/gcc/tree-ssa-loop-manip.cc:679
0x10e5461 tree_unroll_loops_completely
       
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230205/work/gcc-13-20230205/gcc/tree-ssa-loop-ivcanon.cc:1499
0x10e54d1 execute
       
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230205/work/gcc-13-20230205/gcc/tree-ssa-loop-ivcanon.cc:1603
0x10e54d1 execute
       
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230205/work/gcc-13-20230205/gcc/tree-ssa-loop-ivcanon.cc:1593

% gfortran-13 -O1 -fpeel-loops -funreachable-traps -c comment11.f90
during GIMPLE pass: cunroll
comment11.f90:1:14:

    1 | subroutine foo()
      |              ^
internal compiler error: in check_loop_closed_ssa_def, at
tree-ssa-loop-manip.cc:645
<identical backtrace follows>

% gfortran-13 -v
Using built-in specs.
COLLECT_GCC=gfortran-13
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/13/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/var/tmp/portage/sys-devel/gcc-13.0.1_p20230205/work/gcc-13-20230205/configure
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr
--bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/13
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/13/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/13
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/13/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/13/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/13/include/g++-v13
--with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/13/python
--enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt
--disable-werror --with-system-zlib --disable-nls
--disable-libunwind-exceptions --enable-checking=yes
--with-gcc-major-version-only --enable-esp --enable-libstdcxx-time
--disable-libstdcxx-pch --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu --disable-multilib
--with-multilib-list=m64 --disable-fixed-point --enable-targets=all
--enable-libgomp --disable-libssp --disable-libada --disable-cet
--disable-systemtap --enable-valgrind-annotations --disable-vtable-verify
--disable-libvtv --without-zstd --enable-lto --with-isl
--disable-isl-version-check --enable-default-ssp
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 13.0.1 20230205 (experimental) (GCC)