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[Patch ARM] Replace dmb sy with dmb ish

From: Ramana Radhakrishnan <ramana dot radhakrishnan at arm dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Date: Wed, 12 Nov 2014 16:57:59 +0000
Subject: [Patch ARM] Replace dmb sy with dmb ish
Authentication-results: sourceware.org; auth=none

Hans Boehm pointed out that we were using dmb sy instead of dmb ish.Given that the ARM-ARM says that the inner shareability domain is reallythe one that contains all PE's controlled by a single hypervisor oroperating system, it would be safe to replace all dmb sy's with dmb ish's.


This is also in line with what we do in the AArch64 backend.

Will apply after a test run tonight on armhf.

regards
Ramana


	* config/arm/sync.md (memory_barrier): Use dmb ish.

Attachment: dmbish.txt
Description: Text document

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