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Re: [PATCH, i386] Partially revert ix86_cannot_change_mode_class changes

From: Richard Henderson <rth at redhat dot com>
To: Uros Bizjak <ubizjak at gmail dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Cc: Richard Sandiford <richard dot sandiford at arm dot com>
Date: Fri, 5 Feb 2016 07:43:54 +1100
Subject: Re: [PATCH, i386] Partially revert ix86_cannot_change_mode_class changes
Authentication-results: sourceware.org; auth=none
References: <CAFULd4YsXLSRjr6Lmr8AqmrokqxH6wAx2cOYL5go79VoehDCow at mail dot gmail dot com> <CAFULd4ZJbP9nShxEC9xJ5PAg0HBMYMpkPeWscwBFUWheb+dShA at mail dot gmail dot com>

On 02/05/2016 07:07 AM, Uros Bizjak wrote:

Adding forgotten CCs...

On Thu, Feb 4, 2016 at 8:49 PM, Uros Bizjak <ubizjak@gmail.com> wrote:

Hello!

After PR rtl-optimization/69577 fix went in, it looks that we can
remove various kludges involving SSE and MMX register classes from
ix86_cannot_change_mode_class.

2016-02-04  Uros Bizjak  <ubizjak@gmail.com>

     PR rtl-optimization/69577
     Revert:
     2015-10-29  Richard Henderson  <rth@redhat.com>

     PR target/68124
     PR rtl-opt/67609
     * config/i386/i386.c (ix86_cannot_change_mode_class): Tighten
     sse check to the exact conditions of PR 67609.

Patch was bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

rth, as the author of the patch the attached patch is reverting, does
the patch look OK to you?


Yes, reverting the cannot_change_mode_class kludge is fine now.


r~

References:
- [PATCH, i386] Partially revert ix86_cannot_change_mode_class changes
  - From: Uros Bizjak
- Re: [PATCH, i386] Partially revert ix86_cannot_change_mode_class changes
  - From: Uros Bizjak

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