RFR (M): 7023898: Intrinsify AtomicLongFieldUpdater.getAndIncrement()

[Roland Westrelin]

When I merged this with the current code base, I noticed a missing break in Matcher::match_rule_supported() on x86. See below.

Roland.

diff --git a/src/cpu/x86/vm/x86.ad b/src/cpu/x86/vm/x86.ad
--- a/src/cpu/x86/vm/x86.ad
+++ b/src/cpu/x86/vm/x86.ad
@@ -509,10 +509,18 @@
     case Op_PopCountL:
       if (!UsePopCountInstruction)
         return false;
+    break;
     case Op_MulVI:
       if ((UseSSE < 4) && (UseAVX < 1)) // only with SSE4_1 or AVX
         return false;
     break;
+    case Op_CompareAndSwapL:
+#ifdef _LP64
+    case Op_CompareAndSwapP:
+#endif
+      if (!VM_Version::supports_cx8())
+        return false;
+    break;
   }
   
   return true;  // Per default match rules are supported.