[Bug tree-optimization/33453] [4.3 Regression] ICE in build2_stat, at tree.c:3110 with -ftree-parallelize-loops=4 -ftree-vectorize

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

------- Comment #7 from jakub at gcc dot gnu dot org  2007-12-03 15:00 -------
This isn't one bug, but many unrelated ones.
I have a fix for #c3 testcase, a fix for the p+ issue in the initial testcase
and also a different ICE with missing DECL_GIMPLE_REG_P created by parloop.
But those aren't the only ones, when that is fixed, it ICEs again in completely
different spot, I'm afraid the parloop pass still has lots of issues (but those
shouldn't be considered regressions, at least not P2 ones, given that it is a
new pass).

Here is a cleaned up alternative to the initial testcase which doesn't use
undefined vars etc.:
/* { dg-do compile } */
/* { dg-options "-O3 -ftree-parallelize-loops=4" } */
struct T
{
  int t;
  struct { short s1, s2, s3, s4 } *s;
};
void
Create_BCyl (int *a, int *b, int *c, int *d, struct T *e)
{
  int i;
  for (i = 0; i < e->t; i++)
    {
      e->s[i].s1 = a[i];
      e->s[i].s2 = b[i];
      e->s[i].s3 = c[i];
      e->s[i].s4 = d[i];
    }
}

I guess I'll leave the rest to Zdenek/Sebastian once I have tested/posted the
fixes I have.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2007-12-03 13:59:02         |2007-12-03 15:00:02
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33453