[TypeFeedbackVector] Root feedback vectors at function literal site.

test/cctest/test-compiler.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 343 matching lines @@
              "morphing_call = builder();");
 
   Handle<JSFunction> f = Handle<JSFunction>::cast(v8::Utils::OpenHandle(
       *v8::Local<v8::Function>::Cast(CcTest::global()
                                          ->Get(context, v8_str("morphing_call"))
                                          .ToLocalChecked())));
 
   // If we are compiling lazily then it should not be compiled, and so no
   // feedback vector allocated yet.
   CHECK(!f->shared()->is_compiled());
-  CHECK(f->feedback_vector()->is_empty());
 
   CompileRun("morphing_call();");
 
   // Now a feedback vector is allocated.
   CHECK(f->shared()->is_compiled());
   CHECK(!f->feedback_vector()->is_empty());
 }
 
 // Test that optimized code for different closures is actually shared.
 TEST(OptimizedCodeSharing1) {
@@ skipping 292 matching lines @@
   CompileRun("foo()");
   CHECK_EQ(2, foo->feedback_vector()->invocation_count());
   CompileRun("bar()");
   CHECK_EQ(2, foo->feedback_vector()->invocation_count());
   CompileRun("foo(); foo()");
   CHECK_EQ(4, foo->feedback_vector()->invocation_count());
   CompileRun("%BaselineFunctionOnNextCall(foo);");
   CompileRun("foo();");
   CHECK_EQ(5, foo->feedback_vector()->invocation_count());
 }