When checking against non-parametrized types use a cache to hold result tuples (class, result). Tha…

runtime/vm/code_generator_x64.cc

Index: runtime/vm/code_generator_x64.cc
===================================================================
--- runtime/vm/code_generator_x64.cc	(revision 6277)
+++ runtime/vm/code_generator_x64.cc	(working copy)
@@ -1345,7 +1345,10 @@
   __ PushObject(Object::ZoneHandle());  // Make room for the result.
   const Immediate location =
       Immediate(reinterpret_cast<int64_t>(Smi::New(token_index)));
+  const Immediate node_id_as_smi =
+      Immediate(reinterpret_cast<int64_t>(Smi::New(node_id)));
   __ pushq(location);  // Push the source location.
+  __ pushq(node_id_as_smi);
   __ pushq(RAX);  // Push the instance.
   __ PushObject(type);  // Push the type.
   if (!type.IsInstantiated()) {
@@ -1356,7 +1359,7 @@
   GenerateCallRuntime(node_id, token_index, kInstanceofRuntimeEntry);
   // Pop the two parameters supplied to the runtime entry. The result of the
   // instanceof runtime call will be left as the result of the operation.
-  __ addq(RSP, Immediate(4 * kWordSize));
+  __ addq(RSP, Immediate(5 * kWordSize));
   if (negate_result) {
     Label negate_done;
     __ popq(RDX);