[Bug middle-end/115871] New: ICE with declare simd

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115871

            Bug ID: 115871
           Summary: ICE with declare simd
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rguenth at gcc dot gnu.org
  Target Milestone: ---

#pragma omp declare simd inbranch simdlen(32)
double foo (double x)
{
  return x * 4.;
}

ICEs with

during IPA pass: simdclone
dump file: t2.c.097i.simdclone
t2.c: In function ‘foo.simdclone.3’:
t2.c:5:1: internal compiler error: Segmentation fault
    5 | }
      | ^
0x33e4d07 internal_error(char const*, ...)
        /space/rguenther/src/gcc/gcc/diagnostic-global-context.cc:491
0x17a62d4 crash_signal
        /space/rguenther/src/gcc/gcc/toplev.cc:319
0x1304cb7 gimplify_modify_expr
        /space/rguenther/src/gcc/gcc/gimplify.cc:6424
0x133b5f1 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        /space/rguenther/src/gcc/gcc/gimplify.cc:18065
0x1309985 gimplify_stmt(tree_node**, gimple**)
        /space/rguenther/src/gcc/gcc/gimplify.cc:7595
0x12f0be8 gimplify_and_add(tree_node*, gimple**)
        /space/rguenther/src/gcc/gcc/gimplify.cc:519
0x3261f78 simd_clone_init_simd_arrays
        /space/rguenther/src/gcc/gcc/omp-simd-clone.cc:956

I was trying to figure out if we ever create simdclones with two AVX512
mask arguments but simdlen(N) with N > 64 seems to be unsupported.