[turbofan] Add initial support for global specialization.

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 382 matching lines @@
   }
 }
 
 
 // Test that optimized code for different closures is actually shared
 // immediately by the FastNewClosureStub when run different contexts.
 TEST(OptimizedCodeSharing2) {
   if (FLAG_stress_compaction) return;
   FLAG_allow_natives_syntax = true;
   FLAG_cache_optimized_code = true;
+  FLAG_native_context_specialization = false;
   FLAG_turbo_cache_shared_code = true;
   const char* flag = "--turbo-filter=*";
   FlagList::SetFlagsFromString(flag, StrLength(flag));
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   v8::Local<v8::Script> script = v8_compile(
       "function MakeClosure() {"
       "  return function() { return x; };"
       "}");
   Handle<Code> reference_code;
@@ skipping 35 matching lines @@
   }
 }
 
 
 // Test that optimized code for different closures is actually shared
 // immediately by the FastNewClosureStub without context-dependent entries.
 TEST(OptimizedCodeSharing3) {
   if (FLAG_stress_compaction) return;
   FLAG_allow_natives_syntax = true;
   FLAG_cache_optimized_code = true;
+  FLAG_native_context_specialization = false;
   FLAG_turbo_cache_shared_code = true;
   const char* flag = "--turbo-filter=*";
   FlagList::SetFlagsFromString(flag, StrLength(flag));
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   v8::Local<v8::Script> script = v8_compile(
       "function MakeClosure() {"
       "  return function() { return x; };"
       "}");
   Handle<Code> reference_code;
@@ skipping 223 matching lines @@
   CompileRun("function f() { a = 12345678 }; f();");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { a = 12345678 + x}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x += 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
   CompileRun("function f(x) { var arguments = 1; x = 12345678}; f(1);");
   CheckCodeForUnsafeLiteral(GetJSFunction(context->Global(), "f"));
 }
 #endif