[Bug middle-end/35305] Speculative PRE support missing

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2009-03-21 10:53 -------
Wouldn't this be a candidate for forming a superblock from hot traces of
a function?  Thus in the testcase

  if (k && m)
    {
      g1 = a + b;
      g2 = a + b;
    }
  else
    {
... old code
    }

which would also handle the case where we cannot speculatively move code
(like dereferences)?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35305