[turbofan] Implement sharing of context-independent code.

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 352 matching lines @@
   CHECK(f->shared()->is_compiled());
   int expected_slots = 0;
   int expected_ic_slots = 2;
   CHECK_EQ(expected_slots, f->shared()->feedback_vector()->Slots());
   CHECK_EQ(expected_ic_slots, f->shared()->feedback_vector()->ICSlots());
 }
 
 
 // Test that optimized code for different closures is actually shared
 // immediately by the FastNewClosureStub when run in the same context.
-TEST(OptimizedCodeSharing) {
+TEST(OptimizedCodeSharing1) {
   FLAG_stress_compaction = false;
   FLAG_allow_natives_syntax = true;
   FLAG_cache_optimized_code = true;
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   for (int i = 0; i < 10; i++) {
     LocalContext env;
     env->Global()->Set(v8::String::NewFromUtf8(CcTest::isolate(), "x"),
                        v8::Integer::New(CcTest::isolate(), i));
-    CompileRun("function MakeClosure() {"
-               "  return function() { return x; };"
-               "}"
-               "var closure0 = MakeClosure();"
-               "%DebugPrint(closure0());"
-               "%OptimizeFunctionOnNextCall(closure0);"
-               "%DebugPrint(closure0());"
-               "var closure1 = MakeClosure();"
-               "var closure2 = MakeClosure();");
+    CompileRun(
+        "function MakeClosure() {"
+        "  return function() { return x; };"
+        "}"
+        "var closure0 = MakeClosure();"
+        "%DebugPrint(closure0());"
+        "%OptimizeFunctionOnNextCall(closure0);"
+        "%DebugPrint(closure0());"
+        "var closure1 = MakeClosure();"
+        "var closure2 = MakeClosure();");
     Handle<JSFunction> fun1 = v8::Utils::OpenHandle(
         *v8::Local<v8::Function>::Cast(env->Global()->Get(v8_str("closure1"))));
     Handle<JSFunction> fun2 = v8::Utils::OpenHandle(
         *v8::Local<v8::Function>::Cast(env->Global()->Get(v8_str("closure2"))));
     CHECK(fun1->IsOptimized() || !CcTest::i_isolate()->use_crankshaft());
     CHECK(fun2->IsOptimized() || !CcTest::i_isolate()->use_crankshaft());
     CHECK_EQ(fun1->code(), fun2->code());
   }
 }
 
 
+// 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_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;
+  {
+    LocalContext env;
+    env->Global()->Set(v8::String::NewFromUtf8(CcTest::isolate(), "x"),
+                       v8::Integer::New(CcTest::isolate(), 23));
+    script->GetUnboundScript()->BindToCurrentContext()->Run();
+    CompileRun(
+        "var closure0 = MakeClosure();"
+        "%DebugPrint(closure0());"
+        "%OptimizeFunctionOnNextCall(closure0);"
+        "%DebugPrint(closure0());");
+    Handle<JSFunction> fun0 = v8::Utils::OpenHandle(
+        *v8::Local<v8::Function>::Cast(env->Global()->Get(v8_str("closure0"))));
+    CHECK(fun0->IsOptimized() || !CcTest::i_isolate()->use_crankshaft());
+    reference_code = handle(fun0->code());
+  }
+  for (int i = 0; i < 10; i++) {
+    LocalContext env;
+    env->Global()->Set(v8::String::NewFromUtf8(CcTest::isolate(), "x"),
+                       v8::Integer::New(CcTest::isolate(), i));
+    script->GetUnboundScript()->BindToCurrentContext()->Run();
+    CompileRun(
+        "var closure0 = MakeClosure();"
+        "%DebugPrint(closure0());"
+        "%OptimizeFunctionOnNextCall(closure0);"
+        "%DebugPrint(closure0());"
+        "var closure1 = MakeClosure();"
+        "var closure2 = MakeClosure();");
+    Handle<JSFunction> fun1 = v8::Utils::OpenHandle(
+        *v8::Local<v8::Function>::Cast(env->Global()->Get(v8_str("closure1"))));
+    Handle<JSFunction> fun2 = v8::Utils::OpenHandle(
+        *v8::Local<v8::Function>::Cast(env->Global()->Get(v8_str("closure2"))));
+    CHECK(fun1->IsOptimized() || !CcTest::i_isolate()->use_crankshaft());
+    CHECK(fun2->IsOptimized() || !CcTest::i_isolate()->use_crankshaft());
+    CHECK_EQ(*reference_code, fun1->code());
+    CHECK_EQ(*reference_code, fun2->code());
+  }
+}
+
+
 TEST(CompileFunctionInContext) {
   CcTest::InitializeVM();
   v8::HandleScope scope(CcTest::isolate());
   LocalContext env;
   CompileRun("var r = 10;");
   v8::Local<v8::Object> math =
       v8::Local<v8::Object>::Cast(env->Global()->Get(v8_str("Math")));
   v8::ScriptCompiler::Source script_source(v8_str(
       "a = PI * r * r;"
       "x = r * cos(PI);"
@@ skipping 145 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