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Re: [PATCH] Fix RTL sharing problem in CSE
- From: law at redhat dot com
- To: Roger Sayle <roger at www dot eyesopen dot com>
- Cc: Jan Hubicka <jh at suse dot cz>, gcc-patches at gcc dot gnu dot org
- Date: Fri, 17 Jan 2003 15:49:07 -0700
- Subject: Re: [PATCH] Fix RTL sharing problem in CSE
- Reply-to: law at redhat dot com
In message <Pine.LNX.4.44.0301171112100.6779-100000@www.eyesopen.com>, Roger Sa
yle writes:
>I believe that the problems on hppa64 and powerpc will turn out to
>be more latent bugs in the existing GCSE or CSE constant propagation
>code, just like the one in cse_insn that it has already uncovered
>on H8300.
I agree completely.
It's worth noting that the code we're tripping in the PA backend is
notoriously flakey -- even more so for PA64. If it wasn't such a
huge win to use xmpyu I'd suggest we drop the damn thing.
Jeff