[Bug tree-optimization/91403] New: GCC fails with ICE.

[vsevolod.livinskij at frtk dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91403

            Bug ID: 91403
           Summary: GCC fails with ICE.
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vsevolod.livinskij at frtk dot ru
  Target Milestone: ---

GCC fails with an internal compiler error. Sometimes the compilation takes
about 12 minutes before it fails. Originally the bug was reported in r91178.

Reproducer:
extern int a[][1240092];
int b;
void c() {
  for (int d = 2; d <= 9; d++)
    for (int e = 32; e <= 41; e++)
      b += a[d][5];
}

Error:
>$ gcc -march=skylake-avx512 -c -O3 small.c
gcc: internal compiler error: Segmentation fault signal terminated program cc1

GCC version:
gcc version 10.0.0 (rev. 274155)