--- old/src/share/vm/adlc/formssel.cpp	2016-04-12 19:50:30.662635400 -0700
+++ new/src/share/vm/adlc/formssel.cpp	2016-04-12 19:50:30.398635400 -0700
@@ -393,6 +393,11 @@
   return _ident && _ident[0] == 'N' && _ident[1] == 'o' && _ident[2] == 'p' && _ident[3] == '_';
 }
 
+// Return 'true' if this instruction matches an ideal 'Msk' node
+bool InstructForm::is_ideal_msk() const {
+  return _ident && _ident[0] == 'M' && _ident[1] == 's' && _ident[2] == 'k' && _ident[3] == '_' ;
+}
+
 bool InstructForm::is_ideal_control() const {
   if ( ! _matrule)  return false;
 
@@ -1163,6 +1168,9 @@
   else if (is_ideal_nop()) {
     return "MachNopNode";
   }
+  else if (is_ideal_msk()) {
+    return "MachMskNode";
+  }
   else if (is_mach_constant()) {
     return "MachConstantNode";
   }