harmony-scoping: Implement LoadIC handler for loads from global contexts.

test/cctest/test-decls.cc

 // Copyright 2007-2008 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 826 matching lines @@
 
   {
     SimpleContext context;
     Local<String> undefined_string = String::NewFromUtf8(
         CcTest::isolate(), "undefined", String::kInternalizedString);
     Local<String> number_string = String::NewFromUtf8(
         CcTest::isolate(), "number", String::kInternalizedString);
 
     context.Check(
         "function f(o) { return x; }"
-        "function g(o) { x = 15; }"
+        "function g(v) { x = v; }"
         "function h(o) { return typeof x; }",
         EXPECT_RESULT, Undefined(CcTest::isolate()));
     context.Check("h({})", EXPECT_RESULT, undefined_string);
     context.Check(
         "'use strict';"
         "let x = 1;"
         "f({})",
         EXPECT_RESULT, Number::New(CcTest::isolate(), 1));
     context.Check(
         "'use strict';"
-        "g({});x",
+        "g(15);x",
         EXPECT_RESULT, Number::New(CcTest::isolate(), 15));
     context.Check("h({})", EXPECT_RESULT, number_string);
     context.Check("f({})", EXPECT_RESULT, Number::New(CcTest::isolate(), 15));
     context.Check("h({})", EXPECT_RESULT, number_string);
   }
 }
+
+
+TEST(CrossScriptICs) {
+  i::FLAG_harmony_scoping = true;
+  i::FLAG_allow_natives_syntax = true;
+
+  HandleScope handle_scope(CcTest::isolate());
+
+  {
+    SimpleContext context;
+    context.Check(
+        "x = 15;"
+        "function f() { return x; }"
+        "function g() { return x; }"
+        "f()",
+        EXPECT_RESULT, Number::New(CcTest::isolate(), 15));
+    context.Check(
+        "'use strict';"
+        "let x = 5;"
+        "f()",
+        EXPECT_RESULT, Number::New(CcTest::isolate(), 5));
+    for (int k = 0; k < 3; k++) {
+      context.Check("g()", EXPECT_RESULT, Number::New(CcTest::isolate(), 5));
+    }
+    for (int k = 0; k < 3; k++) {
+      context.Check("f()", EXPECT_RESULT, Number::New(CcTest::isolate(), 5));
+    }
+    context.Check("%OptimizeFunctionOnNextCall(g); g()", EXPECT_RESULT,
+                  Number::New(CcTest::isolate(), 5));
+    context.Check("%OptimizeFunctionOnNextCall(f); f()", EXPECT_RESULT,
+                  Number::New(CcTest::isolate(), 5));
+  }
+}