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Re: [Bug tree-optimization/14784] [Tree-ssa] alias analysis deficiency
- From: Daniel Berlin <dberlin at dberlin dot org>
- To: gcc-bugzilla at gcc dot gnu dot org
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 16 Feb 2006 20:04:13 -0500
- Subject: Re: [Bug tree-optimization/14784] [Tree-ssa] alias analysis deficiency
- References: <bug-14784-5077@http.gcc.gnu.org/bugzilla/> <20060216214028.6311.qmail@sourceware.org>
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
>
>