src/share/vm/opto/library_call.cpp

@@ -1173,11 +1173,13 @@
   _sp += 2;
   Node *argument = pop();  // pop non-receiver first:  it was pushed second
   Node *receiver = pop();
 
   Node* result;
-  if (Matcher::has_match_rule(Op_StrIndexOf) &&
+  // Disable the use of pcmpestri until it can be guaranteed that
+  // the load doesn't cross in to the uncommited space.
+  if (false && Matcher::has_match_rule(Op_StrIndexOf) &&
       UseSSE42Intrinsics) {
     // Generate SSE4.2 version of indexOf
     // We currently only have match rules that use SSE4.2
 
     // Null check on self without removing any arguments.  The argument