libitm: Fix privatization safety interaction with serial mode.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232322 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 9 insertions, 0 deletions

diff --git a/libitm/method-gl.cc b/libitm/method-gl.cc
index 87d01dbf1f1d..b2e2bcad71e6 100644
--- a/libitm/method-gl.cc
+++ b/libitm/method-gl.cc
@@ -338,6 +338,15 @@ public:
 
   }
 
+  virtual bool snapshot_most_recent()
+  {
+    // This is the same check as in validate() except that we do not restart
+    // on failure but simply return the result.
+    return o_gl_mg.orec.load(memory_order_relaxed)
+	== gtm_thr()->shared_state.load(memory_order_relaxed);
+  }
+
+
   CREATE_DISPATCH_METHODS(virtual, )
   CREATE_DISPATCH_METHODS_MEM()