[Bug tree-optimization/19341] New: [4.0 Regression] DCE eliminating non-dead code

["belyshev at depni dot sinp dot msu dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

void abort (void);

void __attribute__((regparm(1))) g (int *p)
{
  if (*p != 1)
    abort ();
}

int main ()
{
  int k;
  
  k = 1;
  asm volatile ("call g" :: "a" (&k));
  return 0;
}

-- 
           Summary: [4.0 Regression] DCE eliminating non-dead code
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P1
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: belyshev at depni dot sinp dot msu dot ru
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19341