[Bug rtl-optimization/57347] [4.8/4.9 Regression] wrong code for bitfield on x86_64-linux at -Os and above

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57347

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-05-21
                 CC|                            |jakub at gcc dot gnu.org
   Target Milestone|---                         |4.8.1
            Summary|wrong code for bitfield on  |[4.8/4.9 Regression] wrong
                   |x86_64-linux at -Os and     |code for bitfield on
                   |above                       |x86_64-linux at -Os and
                   |                            |above
     Ever confirmed|0                           |1

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started with r193298 .

struct S1 { int f0; int f1 : 10; int f2 : 13; };
int i;
int *j = &i;

static void
foo (struct S1 s)
{
  int *p;
  int l[88];
  int **pp = &p;
  *pp = &l[1];
  l[0] = 1;
  *j = 1 && s.f2;
}

int
main ()
{
  struct S1 s = { 0, 0, 1 };
  foo (s);
  if (i != 1)
    __builtin_abort ();
  return 0;
}