--- old/src/share/vm/adlc/adlparse.cpp	Thu Jun 30 11:11:03 2011
+++ new/src/share/vm/adlc/adlparse.cpp	Thu Jun 30 11:11:02 2011
@@ -2812,6 +2812,12 @@
     params->add_entry(param);
   }
 
+  // We do this check late so that we can continue parsing
+  if (inst._insencode != NULL) {
+    parse_err(SYNERR, "Multiple ins_encode sections defined\n");
+    return;
+  }
+
   // Set encode class of this instruction.
   inst._insencode = encrule;
 }
@@ -3044,6 +3050,12 @@
   next_char();                     // move past ';'
   skipws();                        // be friendly to oper_parse()
 
+  // We do this check late so that we can continue parsing
+  if (inst._insencode != NULL) {
+    parse_err(SYNERR, "Multiple ins_encode sections defined\n");
+    return;
+  }
+
   // Debug Stuff
   if (_AD._adl_debug > 1) fprintf(stderr,"Instruction Encode: %s\n", ec_name);