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Re: [patch]: COMMITTED Enhance rtl-dse to remove unaligned read after writes.

From: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
To: Kenneth Zadeck <zadeck at naturalbridge dot com>, Ian Lance Taylor <iant at google dot com>, gcc-patches <gcc-patches at gcc dot gnu dot org>, "Christopher, Eric" <echristo at gmail dot com>, pinskia at gmail dot com, rsandifo at nildram dot co dot uk
Date: Sun, 16 Sep 2007 18:28:34 +0200
Subject: Re: [patch]: COMMITTED Enhance rtl-dse to remove unaligned read after writes.
References: <87hcntkfes.fsf@moria.site> <m3bqc7627r.fsf@localhost.localdomain> <46E9D1E3.3070901@naturalbridge.com> <87hclvc7di.fsf@firetop.home>
Reply-to: bonzini at gnu dot org

I've tried to fix these problems in the patch below.  However, I was
also a little uneasy about the use of GET_MODE_CLASS in the shift code.
Are we trying to cope with just MODE_INT, with both MODE_INT and
MODE_PARTIAL_INT, or with more than those two?

MODE_PARTIAL_INT might be useful, in theory at least, but I guess those modes are rarely stored to memory.

Bootstrapped & regression-tested on x86_64-linux-gnu.  Also
regression-tested on mipsisa64-elfoabi, where it fixes a bunch
of execution failures.  OK to install?

Ok.

Paolo

References:
- Re: [patch]: Enhance rtl-dse to remove unaligned read after writes.
  - From: Ian Lance Taylor
- Re: [patch]: COMMITTED Enhance rtl-dse to remove unaligned read after writes.
  - From: Kenneth Zadeck
- Re: [patch]: COMMITTED Enhance rtl-dse to remove unaligned read after writes.
  - From: Richard Sandiford

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