From: Eric Botcazou Date: Fri, 2 Aug 2013 21:43:51 +0000 (+0000) Subject: sparc.c (sparc_emit_membar_for_model): Add the implied StoreLoad barrier for atomic... X-Git-Tag: releases/gcc-4.7.4~550 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a4add37fab2f5cf77cb05955c0c2b4591413d049;p=thirdparty%2Fgcc.git sparc.c (sparc_emit_membar_for_model): Add the implied StoreLoad barrier for atomic operations if before. * config/sparc/sparc.c (sparc_emit_membar_for_model) : Add the implied StoreLoad barrier for atomic operations if before. From-SVN: r201452 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index cca738fbeacf..3ebc9e5664b3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2013-08-02 Eric Botcazou + + * config/sparc/sparc.c (sparc_emit_membar_for_model) : Add + the implied StoreLoad barrier for atomic operations if before. + 2013-07-11 Georg-Johann Lay Backport from 2013-07-11 trunk r200901. diff --git a/gcc/config/sparc/sparc.c b/gcc/config/sparc/sparc.c index 4f8e96f66542..8946b309fb51 100644 --- a/gcc/config/sparc/sparc.c +++ b/gcc/config/sparc/sparc.c @@ -10929,6 +10929,11 @@ sparc_emit_membar_for_model (enum memmodel model, /* Total Store Ordering: all memory transactions with store semantics are followed by an implied StoreStore. */ implied |= StoreStore; + + /* If we're not looking for a raw barrer (before+after), then atomic + operations get the benefit of being both load and store. */ + if (load_store == 3 && before_after == 1) + implied |= StoreLoad; /* FALLTHRU */ case SMM_PSO: