[Bug middle-end/21356] New: Dominance error after aggressive dead code elimination (cd_dce)

["loki at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>]

I have internal compiler error for the following c code:
int a;
void* p;

void foo (void)
{
  switch (a)
  {
    a0: case 0:   p = &&a1;
    a1: case 1:   p = &&a2;
    a2: default:  p = &&a1;
  }
  goto *p;
}

Command line:
gcc -c -O2 1.c

Output:
1.c: In function 'foo':
1.c:5: error: dominator of 1 should be 2, not 0
1.c:5: internal compiler error: in verify_dominators, at dominance.c:875
...

-- 
           Summary: Dominance error after aggressive dead code elimination
                    (cd_dce)
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: loki at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: i686-pc-linux-gnu-gcc


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21356