[Bug tree-optimization/91114] New: [10 Regression] ICE in vect_analyze_loop, at tree-vect-loop.c:2415

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91114

            Bug ID: 91114
           Summary: [10 Regression] ICE in vect_analyze_loop, at
                    tree-vect-loop.c:2415
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-checking, ice-on-valid-code, openmp
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: x86_64-unknown-linux-gnu

gcc-10.0.0-alpha20190707 snapshot (r273184) ICEs when compiling the following
testcase w/ -O1 -fopenmp-simd:

void
ne (double *zu)
{
  int h3;

#pragma omp simd simdlen (4)
  for (h3 = 0; h3 < 4; ++h3)
    zu[h3] = 0;
}

% x86_64-unknown-linux-gnu-gcc-10.0.0-alpha20190707 -O1 -fopenmp-simd -c
hnkztevu.c
during GIMPLE pass: vect
hnkztevu.c: In function 'ne':
hnkztevu.c:2:1: internal compiler error: in vect_analyze_loop, at
tree-vect-loop.c:2415
    2 | ne (double *zu)
      | ^~
0x6fe6b2 vect_analyze_loop(loop*, _loop_vec_info*, vec_info_shared*)
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190707/work/gcc-10-20190707/gcc/tree-vect-loop.c:2415
0xfc5495 try_vectorize_loop_1
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190707/work/gcc-10-20190707/gcc/tree-vectorizer.c:886
0xfc613f vectorize_loops()
       
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20190707/work/gcc-10-20190707/gcc/tree-vectorizer.c:1114