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[PATCH] S/390: Optimize atomic_compare_exchange and atomic_compare builtins.

From: Dominik Vogt <vogt at linux dot vnet dot ibm dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Andreas Krebbel <krebbel at linux dot vnet dot ibm dot com>, Ulrich Weigand <Ulrich dot Weigand at de dot ibm dot com>
Date: Mon, 27 Mar 2017 21:27:35 +0100
Subject: [PATCH] S/390: Optimize atomic_compare_exchange and atomic_compare builtins.
Authentication-results: sourceware.org; auth=none
Reply-to: vogt at linux dot vnet dot ibm dot com

The attached patch optimizes the atomic_exchange and
atomic_compare patterns on s390 and s390x (mostly limited to
SImode and DImode).  Among general optimizaation, the changes fix
most of the problems reported in PR 80080:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80080

Bootstrapped and regression tested on a zEC12 with s390 and s390x
biarch.

Ciao

Dominik ^_^  ^_^

-- 

Dominik Vogt
IBM Germany

Attachment: 0001-ChangeLog
Description: Text document

Attachment: 0001-S-390-Optimize-atomic_compare_exchange-and-atomic_co.patch
Description: Text document

Follow-Ups:
- Re: [PATCH v2] S/390: Optimize atomic_compare_exchange and atomic_compare builtins.
  - From: Dominik Vogt

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