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Re: patch/RFC: PR optimization/8423
- From: Richard Henderson <rth at redhat dot com>
- To: Zack Weinberg <zack at codesourcery dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Wed, 6 Nov 2002 11:23:37 -0800
- Subject: Re: patch/RFC: PR optimization/8423
- References: <20021105215500.GF1050@egil.codesourcery.com>
On Tue, Nov 05, 2002 at 01:55:00PM -0800, Zack Weinberg wrote:
> Staring at toplev.c for awhile leads me to believe that the right fix
> for this is to run GCSE _before_ CSE, and make GCSE aware of
> CONSTANT_P_RTX. The appended patch does just that. Since this is a
> drastic change, I will also check what overall effect this has on code
> quality by examining bootstrap times and the size of the generated
> compiler.
I wonder if this means we can get rid of one of the local cse
passes? It wouldn't surprise me if this is indeed now redundant,
since gcse has acquired some local propagation skills.
Failing improvements in both compile quality and compile time,
I think we should simply xfail this test.
r~