[Bug c/86046] New: [9 Regression] ICE in execute_todo, at passes.c:2043

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86046

            Bug ID: 86046
           Summary: [9 Regression] ICE in execute_todo, at passes.c:2043
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Since end of april, gcc configured with --enable-checking=release
and test case compiled with option -fchecking :


$ cat z1.c
typedef int V __attribute__ ((vector_size(4)));
void fn1 ()
{
  (V){(1,0)}[1] = 0;
}


$ gcc-8 -c z1.c -fchecking -O2
$
$ gcc-9-20180603 -c z1.c -fchecking -O0
$ gcc-9-20180603 -c z1.c -fchecking -O2
during GIMPLE pass: forwprop
z1.c: In function 'fn1':
z1.c:5:1: internal compiler error: in execute_todo, at passes.c:2043
 }
 ^
0xa2a4da execute_todo
        ../../gcc/passes.c:2043