This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

[ARM] Fix PR49641

From: Bernd Schmidt <bernds at codesourcery dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 07 Jul 2011 22:02:53 +0200
Subject: [ARM] Fix PR49641

This corrects an error in store_multiple_operation. We're only
generating the writeback version of the instruction on Thumb-1, so
that's where we must make sure the base register isn't also stored.

The ARMv7 manual is unfortunately not totally clear that this does in
fact produce unpredictable results; it seems to suggest that this is the
case only for the T2 encoding. Older documentation makes it clear.

Tested on arm-eabi{,mthumb}.


Bernd

Attachment: pr49641.diff
Description: Text document

Follow-Ups:
- Re: [ARM] Fix PR49641
  - From: Richard Earnshaw

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]