From 2e65f38f1bf1f04c530bfeb6b543f084564eec3d Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@redhat.com>
Date: Wed, 30 Nov 2011 08:10:24 -0800
Subject: sparc: Add -mmemory-model command-line option.

	* config/sparc/sparc-opts.h (enum sparc_memory_model_type): New.
	* config/sparc/sparc.opt (mmemory-model=): New option.
	* doc/invoke.texi (Sparc Options): Document it.
	* config/sparc/sparc.c (sparc_option_override): Provide default
	for sparc_memory_model.
	(sparc_emit_membar_for_model): Omit barrier combinations that are
	implied by the memory model.

From-SVN: r181853
---
 gcc/config/sparc/sparc-opts.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'gcc/config/sparc/sparc-opts.h')

diff --git a/gcc/config/sparc/sparc-opts.h b/gcc/config/sparc/sparc-opts.h
index 266cb14..7682eb9 100644
--- a/gcc/config/sparc/sparc-opts.h
+++ b/gcc/config/sparc/sparc-opts.h
@@ -47,4 +47,14 @@ enum processor_type {
   PROCESSOR_NATIVE
 };
 
+/* Sparc system memory model.  See Appendix D in the Sparc V9 manual
+   for formal specification, and Appendix J for more discussion.  */
+enum sparc_memory_model_type {
+  SMM_DEFAULT,	/* Uninitialized.  */
+  SMM_RMO,	/* Relaxed Memory Order.  */
+  SMM_PSO,	/* Partial Store Order.  */
+  SMM_TSO,	/* Total Store Order.  */
+  SMM_SC	/* Sequential Consistency.  */
+};
+
 #endif
-- 
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