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Re: [PATCH] More REG_EQ* notes cleanups

From: Grigory Zagorodnev <grigory_zagorodnev at linux dot intel dot com>
To: Steven Bosscher <stevenb dot gcc at gmail dot com>
Cc: gcc-patches at gcc dot gnu dot org, zadeck at naturalbridge dot com, "Sayle, Roger" <roger at eyesopen dot com>
Date: Mon, 12 Feb 2007 15:48:29 +0300
Subject: Re: [PATCH] More REG_EQ* notes cleanups
References: <200702111443.33920.steven.bosscher@gmail.com>

Steven Bosscher wrote:

The patch is mostly mechanical, but there is one interesting change
to local-alloc.c.  We used to turn REG_EQUAL notes into REG_EQUIV
notes if the note datum was invariant.  But this is wrong if there
is more than one set to the register that the REG_EQUAL note applies

Hi, Steven! Unfortunately this patch resulted in output miscompare for two spec cpu2006 benchmarks 464.h264ref and 482.sphinx3 on i386-redhat-linux.

Bug report submitted: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30773

- Grigory

Follow-Ups:
- Re: [PATCH] More REG_EQ* notes cleanups
  - From: Roger Sayle

References:
- [PATCH] More REG_EQ* notes cleanups
  - From: Steven Bosscher

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