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[Bug tree-optimization/28410] [4.2 Regression] Wrong aliasing with global var grouping during call clobbering
- From: "dberlin at dberlin dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 18 Jul 2006 14:06:19 -0000
- Subject: [Bug tree-optimization/28410] [4.2 Regression] Wrong aliasing with global var grouping during call clobbering
- References: <bug-28410-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from dberlin at gcc dot gnu dot org 2006-07-18 14:06 -------
Subject: Re: [4.2 Regression] Wrong aliasing
with global var grouping during call clobbering
dnovillo at gcc dot gnu dot org wrote:
> ------- Comment #3 from dnovillo at gcc dot gnu dot org 2006-07-18 13:25 -------
>
> Testing patch. The bug was in the alias pruning code. We need to handle
> .GLOBAL_VAR in access_can_touch_variable. A memory reference that uses a
> call-clobbered memory tag should always be considered to touch .GLOBAL_VAR.
Yay for random invariants!
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28410