deps: cherry-pick 08377af from v8 upstream

Orignial commit message:

[crankshaft] No need to rely on the @@hasInstance protector.

In Crankshaft we can actually do an abstract interpretation of the
@@hasInstance lookup when optimizing instanceof and then use the
normal machinery to protect the result instead of relying on the
global @@hasInstance protector cell for optimizations.

This recovers the 100x performance drop in Node.js v7 reported in
https://github.com/nodejs/node/issues/9634. This patch should be
easily back-mergable to Node.js v7.

BUG=v8:5640
R=yangguo@chromium.org,franzih@chromium.org

Committed: https://crrev.com/08377af957b1602396ebf3e11ae000f15ed09333
Cr-Commit-Position: refs/heads/master@{#41059}

PR-URL: https://github.com/nodejs/node/pull/9730
Fixes: https://github.com/nodejs/node/issues/9634
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

deps/v8/include/v8-version.h

@@ -11,7 +11,7 @@
 #define V8_MAJOR_VERSION 5
 #define V8_MINOR_VERSION 4
 #define V8_BUILD_NUMBER 500
-#define V8_PATCH_LEVEL 43
+#define V8_PATCH_LEVEL 44
 
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)

deps/v8/src/bootstrapper.cc

@@ -1206,6 +1206,7 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
         JSObject::kHeaderSize, MaybeHandle<JSObject>(),
         Builtins::kFunctionPrototypeHasInstance,
         static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY));
+    native_context()->set_function_has_instance(*has_instance);
 
     // Set the expected parameters for @@hasInstance to 1; required by builtin.
     has_instance->shared()->set_internal_formal_parameter_count(1);

deps/v8/src/contexts.h

@@ -78,6 +78,7 @@ enum ContextLookupFlags {
   V(MAP_GET_METHOD_INDEX, JSFunction, map_get)                              \
   V(MAP_HAS_METHOD_INDEX, JSFunction, map_has)                              \
   V(MAP_SET_METHOD_INDEX, JSFunction, map_set)                              \
+  V(FUNCTION_HAS_INSTANCE_INDEX, JSFunction, function_has_instance)         \
   V(OBJECT_VALUE_OF, JSFunction, object_value_of)                           \
   V(OBJECT_TO_STRING, JSFunction, object_to_string)                         \
   V(PROMISE_CATCH_INDEX, JSFunction, promise_catch)                         \

deps/v8/src/crankshaft/hydrogen.cc

@@ -11563,19 +11563,31 @@ void HOptimizedGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
         HConstant::cast(right)->handle(isolate())->IsJSFunction()) {
       Handle<JSFunction> function =
           Handle<JSFunction>::cast(HConstant::cast(right)->handle(isolate()));
-      // Make sure the prototype of {function} is the %FunctionPrototype%, and
+      // Make sure that the {function} already has a meaningful initial map
-      // it already has a meaningful initial map (i.e. we constructed at least
+      // (i.e. we constructed at least one instance using the constructor
-      // one instance using the constructor {function}).
+      // {function}).
-      // We can only use the fast case if @@hasInstance was not used so far.
+      if (function->has_initial_map()) {
-      if (function->has_initial_map() &&
+        // Lookup @@hasInstance on the {function}.
-          function->map()->prototype() ==
+        Handle<Map> function_map(function->map(), isolate());
-              function->native_context()->closure() &&
+        PropertyAccessInfo has_instance(
-          !function->map()->has_non_instance_prototype() &&
+            this, LOAD, function_map,
-          isolate()->IsHasInstanceLookupChainIntact()) {
+            isolate()->factory()->has_instance_symbol());
+        // Check if we are using the Function.prototype[@@hasInstance].
+        if (has_instance.CanAccessMonomorphic() &&
+            has_instance.IsDataConstant() &&
+            has_instance.constant().is_identical_to(
+                isolate()->function_has_instance())) {
+          // Add appropriate receiver map check and prototype chain
+          // checks to guard the @@hasInstance lookup chain.
+          AddCheckMap(right, function_map);
+          if (has_instance.has_holder()) {
+            Handle<JSObject> prototype(
+                JSObject::cast(has_instance.map()->prototype()), isolate());
+            BuildCheckPrototypeMaps(prototype, has_instance.holder());
+          }
+          // Perform the prototype chain walk.
           Handle<Map> initial_map(function->initial_map(), isolate());
           top_info()->dependencies()->AssumeInitialMapCantChange(initial_map);
-        top_info()->dependencies()->AssumePropertyCell(
-            isolate()->factory()->has_instance_protector());
           HInstruction* prototype =
               Add<HConstant>(handle(initial_map->prototype(), isolate()));
           HHasInPrototypeChainAndBranch* result =
@@ -11583,6 +11595,7 @@ void HOptimizedGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
           return ast_context()->ReturnControl(result, expr->id());
         }
       }
+    }
 
     Callable callable = CodeFactory::InstanceOf(isolate());
     HValue* stub = Add<HConstant>(callable.code());