6829187: compiler optimizations required for JSR 292

C2 implementation for invokedynamic support.

Reviewed-by: kvn, never

hotspot/src/share/vm/ci/ciClassList.hpp

@@ -25,6 +25,7 @@
 class ciEnv;
 class ciObjectFactory;
 class ciConstantPoolCache;
+class ciCPCache;
 
 class ciField;
 class ciConstant;