[Bug tree-optimization/14784] [Tree-ssa] alias analysis deficiency

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2006-02-16 21:40 -------
We get:
  # bitmap_free_7 = PHI <bitmap_free_1(4), bitmap_free_6(5)>;
<L0>:;

  # bitmap_free_1 = PHI <bitmap_free_7(3), bitmap_free_2(2)>;
<L4>:;
  #   VUSE <bitmap_free_1>;
  D.1534_4 = head_3->using_obstack;
  if (D.1534_4 != 0) goto <L1>; else goto <L0>;

<L1>:;
  #   bitmap_free_6 = V_MUST_DEF <bitmap_free_1>;
  bitmap_free = elt_5;
  goto <bb 3> (<L0>);

I cannot figure out why Daniel's recent patches did not fix this one.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14784