[Bug c/98087] New: [11 Regression] ICE: Floating point exception

[gscfq--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98087

            Bug ID: 98087
           Summary: [11 Regression] ICE: Floating point exception
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gs...@t-online.de
  Target Milestone: ---

Changed between 20201115 and 20201122 :


$ cat z1.c
struct S {};
void foo (int n)
{
  struct S a[n][0];
  __builtin_clear_padding (a);
}


$ gcc-11-20201129 -c z1.c
during GIMPLE pass: lower
z1.c: In function 'foo':
z1.c:2:6: internal compiler error: Floating point exception
    2 | void foo (int n)
      |      ^~~
0xb49eaf crash_signal
        ../../gcc/toplev.c:330
0x8b9ff1 clear_padding_type
        ../../gcc/gimple-fold.c:4555
0x8ba973 gimple_fold_builtin_clear_padding
        ../../gcc/gimple-fold.c:4723
0x8c4c5f gimple_fold_builtin
        ../../gcc/gimple-fold.c:4897
0x8c6f6b gimple_fold_call
        ../../gcc/gimple-fold.c:5328
0x8c6f6b fold_stmt_1
        ../../gcc/gimple-fold.c:6029
0x13bfee9 lower_stmt
        ../../gcc/gimple-low.c:388
0x13bfee9 lower_sequence
        ../../gcc/gimple-low.c:217
0x13bffcc lower_stmt
        ../../gcc/gimple-low.c:286
0x13bffcc lower_sequence
        ../../gcc/gimple-low.c:217
0x13bfd58 lower_gimple_bind
        ../../gcc/gimple-low.c:473
0x13c0a91 lower_function_body
        ../../gcc/gimple-low.c:110
0x13c0a91 execute
        ../../gcc/gimple-low.c:195