[Bug middle-end/38671] [4.3/4.4/4.5 Regression] extra code for setting up loops (IV-opts and 32bits vs 64bits)

[pinskia at gcc dot gnu dot org]

------- Comment #7 from pinskia at gcc dot gnu dot org  2010-03-01 23:32 -------
Still getting:
  D.41749_31 = n_13 + 4294967295;
  D.41750_32 = (long unsigned int) D.41749_31;
  D.41751_49 = D.41750_32 + 1;

Reduced testcase:
int f(int *a, int n, int *b)
{
  n = n >> 2;
  do {
   *b = *a;
    a += 4;
   b += 4;
  } while (--n);
}

--- CUT ---
I want to say this was introduced by POINTER plus work :(.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|                            |4.3.2 4.5.0
      Known to work|                            |4.2.4
            Summary|[4.4/4.5 Regression] extra  |[4.3/4.4/4.5 Regression]
                   |code for setting up loops   |extra code for setting up
                   |(IV-opts and 32bits vs      |loops (IV-opts and 32bits vs
                   |64bits)                     |64bits)


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38671