[ic] [stubs] Don't use Code::flags in megamorphic stub cache hash computations.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index b1d45b63e3ed78d08469005931ce894939de1a88..7970c0f2b997b52e85e8e1f25409bfa8fef2b11a 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -1386,6 +1386,7 @@ class FunctionPrototypeStub : public PlatformCodeStub {
       : PlatformCodeStub(isolate) {}
 
   Code::Kind GetCodeKind() const override { return Code::HANDLER; }
+  ExtraICState GetExtraICState() const override { return Code::LOAD_IC; }

[Jakob Kummerow, 2016/07/12 12:55:49]

Code::LOAD_IC is a Code::Kind, not an ExtraICState. Why is this needed?

[Igor Sheludko, 2016/07/12 13:06:54]

This stub is a handler and handlers store the IC kind in the extra IC state (see
Code::ComputeHandlerFlags()). I had to add this in order to fix the failing
flags.

 
   // TODO(mvstanton): only the receiver register is accessed. When this is
   // translated to a hydrogen code stub, a new CallInterfaceDescriptor