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[Bug tree-optimization/39604] [4.3/4.4/4.5 Regression] tree-ssa-sink breaks stack layout
- From: "rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 1 Apr 2009 14:29:03 -0000
- Subject: [Bug tree-optimization/39604] [4.3/4.4/4.5 Regression] tree-ssa-sink breaks stack layout
- References: <bug-39604-14095@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from rguenther at suse dot de 2009-04-01 14:29 -------
Subject: Re: [4.3/4.4/4.5 Regression] tree-ssa-sink
breaks stack layout
On Wed, 1 Apr 2009, jakub at gcc dot gnu dot org wrote:
> ------- Comment #6 from jakub at gcc dot gnu dot org 2009-04-01 14:15 -------
> One would hope that with -fno-strict-aliasing we can still share the stack
> slots even with alias export patch, otherwise the kernel people are going to be
> extremely violent on us.
I think it would be easier to fix scheduling to properly detect
the must-conflicts by noting down the stack slot partition used
in MEMs (and obviously if we end up having MEMs w/o an assigned
parition make that conflict with any other - this can then be
refined with PTA information from the alias export).
The same is true for gcse-sm - any other RTL pass that may
be a problem?
Richard.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39604