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[PATCH] Fix bug in hoisting when using -fgcse-las

From: Maxim Kuvyrkov <maxim at codesourcery dot com>
To: gcc-patches <gcc-patches at gcc dot gnu dot org>
Cc: Jeff Law <law at redhat dot com>
Date: Wed, 28 Jul 2010 20:13:58 +0400
Subject: [PATCH] Fix bug in hoisting when using -fgcse-las

This patch fixes http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45107 .

The problem is due to mismatch in max_distance values for the same expression when it is processed on the LHS versus the RHS.

More specifically, the problem due to me not including -fgcse-las in the testing of hoisting improvements patches.

The attached patch fixes the bug. It was tested by bootstrapping GCC with -fgcse-las in BOOT_CFLAGS.

OK to apply?

--
Maxim Kuvyrkov
CodeSourcery
maxim@codesourcery.com
(650) 331-3385 x724

Attachment: fsf-gcc-pr45107.ChangeLog
Description: Text document

Attachment: fsf-gcc-pr45107.patch
Description: Text document

Follow-Ups:
- Re: [PATCH] Fix bug in hoisting when using -fgcse-las
  - From: Jeff Law

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