Add infrastructure to automatucally generate IC miss stubs

src/ic.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2748 matching lines @@
 // Used from ICCompareStub::GenerateMiss in code-stubs-<arch>.cc.
 RUNTIME_FUNCTION(Code*, CompareIC_Miss) {
   NoHandleAllocation na(isolate);
   ASSERT(args.length() == 3);
   CompareIC ic(isolate, static_cast<Token::Value>(args.smi_at(2)));
   ic.UpdateCaches(args.at<Object>(0), args.at<Object>(1));
   return ic.target();
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Unreachable) {
+  UNREACHABLE();
+  CHECK(false);
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, ToBoolean_Patch) {
   ASSERT(args.length() == 3);
 
   HandleScope scope(isolate);
   Handle<Object> object = args.at<Object>(0);
   Register tos = Register::from_code(args.smi_at(1));
   ToBooleanStub::Types old_types(args.smi_at(2));
 
   ToBooleanStub::Types new_types(old_types);
   bool to_boolean_value = new_types.Record(object);
@@ skipping 19 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal