Simpler and better inlined type checks as discussed. Changed inline type test cache arrays to conta…

runtime/vm/code_generator.h

Index: runtime/vm/code_generator.h
===================================================================
--- runtime/vm/code_generator.h	(revision 7102)
+++ runtime/vm/code_generator.h	(working copy)
@@ -124,6 +124,19 @@
 };
 
 
+// A subtype test cache is an array remembering subtype tests for given values.
+class SubTypeTestCache : public AllStatic {
+ public:
+  enum Entries {
+    kInstanceClass = 0,
+    kInstanceTypeArguments = 1,
+    kInstantiatorTypeArguments = 2,
+    kTestResult = 3,
+    kNumEntries  = 4,
+  };
+};
+
+
 RawCode* ResolveCompileInstanceCallTarget(Isolate* isolate,
                                           const Instance& receiver);