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Re: [patch] Hookize SMALL_REGISTER_CLASSES, make SSE register classes not small

From: Steven Bosscher <stevenb dot gcc at gmail dot com>
To: Jan Hubicka <hubicka at ucw dot cz>
Cc: Richard Guenther <richard dot guenther at gmail dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Uros Bizjak <ubizjak at gmail dot com>, Richard Henderson <rth at redhat dot com>
Date: Mon, 15 Jun 2009 06:06:14 +0200
Subject: Re: [patch] Hookize SMALL_REGISTER_CLASSES, make SSE register classes not small
References: <571f6b510906140929n60da6607g132b8df9fda40f51@mail.gmail.com> <84fc9c000906140935h153c4c8cr8ca064099a00b925@mail.gmail.com> <20090615001938.GA4732@kam.mff.cuni.cz>

2009/6/15 Jan Hubicka <hubicka@ucw.cz>:
> Hmm, SSE0 has special register class (SSE_FIRST_REG) and it is used for
> parameter passing as hard regs. ?Can't one construct ICE using those?

There are so many other SSE regs that there is usually one available
to "spill" SSE0 to. Or you get a normal spill. Anyway, I don't have a
test case, and the whole test suite passes.  You have a far bigger
test suite, maybe you can see if something breaks for you?

Ciao!
Steven

References:
- [patch] Hookize SMALL_REGISTER_CLASSES, make SSE register classes not small
  - From: Steven Bosscher
- Re: [patch] Hookize SMALL_REGISTER_CLASSES, make SSE register classes not small
  - From: Richard Guenther
- Re: [patch] Hookize SMALL_REGISTER_CLASSES, make SSE register classes not small
  - From: Jan Hubicka

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