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Subject: [Bug tree-optimization/14784] [Tree-ssa] alias analysis deficiency
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------- Comment #5 from dberlin at gcc dot gnu dot org  2006-02-17 01:04 -------
Subject: Re:  [Tree-ssa] alias analysis
        deficiency

On Thu, 2006-02-16 at 21:40 +0000, pinskia at gcc dot gnu dot org wrote:
> 
> ------- 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.

Probably the !POINTER_TYPE_P check

> 
> 


-- 


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