[Bug target/105479] New: ICE in subreg_size_lowpart_offset, at emit-rtl.cc:1673

[Bug target/105479] New: ICE in subreg_size_lowpart_offset, at emit-rtl.cc:1673

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105479

            Bug ID: 105479
           Summary: ICE in subreg_size_lowpart_offset, at emit-rtl.cc:1673
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, ra
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: aarch64-linux-gnu

gfortran 13.0.0 20220501 snapshot (g:75bbc3da3e5f75f683fa33e309045c582efd20eb)
ICEs when compiling the following testcase, extracted from
test/f90_correct/src/ei10.F90 from the Classic Flang test suite, w/ -mcpu=a64fx
-O2 -fnon-call-exceptions -ftrapv:

subroutine copy_str_to_result( str, result)
  integer :: result(:)
  character(len=*) :: str
  integer :: i

  do i=1,len(str)
     result(i) = iachar(str(i:i))
  enddo

end subroutine

% aarch64-linux-gnu-gfortran-13.0.0 -mcpu=a64fx -O2 -fnon-call-exceptions
-ftrapv -c vdhfytlt.f90
during RTL pass: reload
vdhfytlt.f90:10:14:

   10 | end subroutine
      |              ^
internal compiler error: in subreg_size_lowpart_offset, at emit-rtl.cc:1673
0x6d94a8 subreg_size_lowpart_offset(poly_int<2u, unsigned long>, poly_int<2u,
unsigned long>)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/emit-rtl.cc:1673
0xb8d4fa gen_lowpart_SUBREG(machine_mode, rtx_def*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/emit-rtl.cc:1037
0xdea08f emit_spill_move
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/lra-constraints.cc:1245
0xdec749 split_reg
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/lra-constraints.cc:5915
0xded2e9 split_if_necessary
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/lra-constraints.cc:6101
0xdfb200 inherit_in_ebb
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/lra-constraints.cc:6633
0xdfb200 lra_inheritance()
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/lra-constraints.cc:6958
0xde1d4c lra(_IO_FILE*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/lra.cc:2404
0xd98189 do_reload
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/ira.cc:5940
0xd98189 execute
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-13.0.0_p20220501/work/gcc-13-20220501/gcc/ira.cc:6126

[Bug target/105479] ICE in subreg_size_lowpart_offset, at emit-rtl.cc:1673

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105479

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2024-01-26
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.