[turbofan] Port Crankshaft's weak objects mechanism to TurboFan.

test/cctest/heap/test-heap.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 4748 matching lines @@
   Isolate* isolate = CcTest::i_isolate();
   v8::internal::Heap* heap = CcTest::heap();
 
   if (!isolate->use_crankshaft()) return;
   HandleScope outer_scope(heap->isolate());
   Handle<Code> code;
   {
     LocalContext context;
     HandleScope scope(heap->isolate());
 
-    CompileRun("bar = (function() {"
-               "  function bar() {"
-               "    return foo(1);"
-               "  };"
-               "  var foo = function(x) { with (x) { return 1 + x; } };"
-               "  bar(foo);"
-               "  bar(foo);"
-               "  bar(foo);"
-               "  %OptimizeFunctionOnNextCall(bar);"
-               "  bar(foo);"
-               "  return bar;})();");
+    CompileRun(
+        "bar = (function() {"
+        "  function bar() {"
+        "    return foo(1);"
+        "  };"
+        "  var foo = function(x) { with (x) { return 1 + x; } };"
+        "  %NeverOptimizeFunction(foo);"
+        "  bar(foo);"
+        "  bar(foo);"
+        "  bar(foo);"
+        "  %OptimizeFunctionOnNextCall(bar);"
+        "  bar(foo);"
+        "  return bar;})();");
 
     Handle<JSFunction> bar = Handle<JSFunction>::cast(v8::Utils::OpenHandle(
         *v8::Local<v8::Function>::Cast(CcTest::global()
                                            ->Get(context.local(), v8_str("bar"))
                                            .ToLocalChecked())));
     code = scope.CloseAndEscape(Handle<Code>(bar->code()));
   }
 
   // Now make sure that a gc should get rid of the function
   for (int i = 0; i < 4; i++) {
@@ skipping 12 matching lines @@
   Isolate* isolate = CcTest::i_isolate();
   v8::internal::Heap* heap = CcTest::heap();
 
   if (!isolate->use_crankshaft()) return;
   HandleScope outer_scope(heap->isolate());
   Handle<Code> code;
   {
     LocalContext context;
     HandleScope scope(heap->isolate());
 
-    CompileRun("function bar() {"
-               "  return foo(1);"
-               "};"
-               "function foo(x) { with (x) { return 1 + x; } };"
-               "bar();"
-               "bar();"
-               "bar();"
-               "%OptimizeFunctionOnNextCall(bar);"
-               "bar();");
+    CompileRun(
+        "function bar() {"
+        "  return foo(1);"
+        "};"
+        "function foo(x) { with (x) { return 1 + x; } };"
+        "%NeverOptimizeFunction(foo);"
+        "bar();"
+        "bar();"
+        "bar();"
+        "%OptimizeFunctionOnNextCall(bar);"
+        "bar();");
 
     Handle<JSFunction> bar = Handle<JSFunction>::cast(v8::Utils::OpenHandle(
         *v8::Local<v8::Function>::Cast(CcTest::global()
                                            ->Get(context.local(), v8_str("bar"))
                                            .ToLocalChecked())));
     code = scope.CloseAndEscape(Handle<Code>(bar->code()));
   }
 
   // Now make sure that a gc should get rid of the function
   for (int i = 0; i < 4; i++) {
@@ skipping 1622 matching lines @@
   isolate->IncrementJsCallsFromApiCounter();
   isolate->IncrementJsCallsFromApiCounter();
   isolate->IncrementJsCallsFromApiCounter();
   calls_per_ms = memory_reducer->SampleAndGetJsCallsPerMs(4);
   CheckDoubleEquals(2, calls_per_ms);
 }
 
 
 }  // namespace internal
 }  // namespace v8