[Bug tree-optimization/35653] [4.3/4.4 Regression]: gcc-4.3 -O3/-ftree-vectorize regression: incorrect code generation

[rguenth at gcc dot gnu dot org]

------- Comment #12 from rguenth at gcc dot gnu dot org  2008-03-24 16:48 -------
I tend to agree with Andrew here.  If you go through a packed union the failure
vanishes:

union U  {
  unsigned u;
}__attribute__((packed));
int main()
{
  char buf[256];
  char *dest;
  int i;

  dest = &buf[2];
  for (i = 0; i < 32; i++)
  {
    ((union U *)dest)->u = 0;
    dest += 4;
  }

  return buf[2];
}

So, IMHO this bug is invalid.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35653