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Sched patch: better condition mutex testing

From: Bernd Schmidt <bernds at codesourcery dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Fri, 27 May 2011 08:14:19 +0000
Subject: Sched patch: better condition mutex testing

When regrename is enabled, it makes new copies of its replacement
registers, which means that pointer equality tests can't be used
afterwards to check whether two regs are equal.
sched_insn_conditions_mutex_p has one such test, and it causes
pessimized code in some situations on C6X.

The following patch fixes it. Regression tested with a 4.5 c6x-elf
compiler. I tried to bootstrap ia64, but that has PR48496. Ok?


Bernd

Attachment: mutex.diff
Description: Text document

Follow-Ups:
- Re: Sched patch: better condition mutex testing
  - From: Vladimir Makarov

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