[Bug tree-optimization/32873] New: [4.3 Regression] glibc ICE's gcc-4.3.0 SSA corruption

[pinskia at gcc dot gnu dot org]

Unable to coalesce ssa_names 1221 and 144 which are marked as MUST COALESCE.
is_long_double_1221(ab) and  is_long_double_144(ab)
vfprintf.c: In function '_IO_vfprintf_internal':
vfprintf.c:184: internal compiler error: SSA corruption
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.


Testcase:
void _IO_vfprintf_internal ( char *f )
{
  static const void *const step0_jumps[] = { &&do_form_unknown, &&do_flag_plus,
&&do_form_float };
  const void * ptr = step0_jumps[0];
  do {
    char spec;
    spec = (*++f);
    goto *ptr;
do_flag_plus:
     read_int (&f);
do_number:
    _itoa_word (spec);
do_form_float:
    if (ptr != ((void *)0))
    {
      spec = 'x';
      goto do_number;
    }
    if (spec != 'S')
      __strnlen ();
    return;
    do_form_unknown:;
  }
  while (*f != '\0');
}


-- 
           Summary: [4.3 Regression] glibc ICE's gcc-4.3.0 SSA corruption
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32873