Adapt hydrogen-based Array constructor to also support InternalArray and function call

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 7ee6081026b7c58a786a3e3a5985a69259b1f787..1a3588f6a7a93175ce4f2833825b7ecfe9d7dd99 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -1767,9 +1767,10 @@ HGraphBuilder::JSArrayBuilder::JSArrayBuilder(HGraphBuilder* builder,
                                               ElementsKind kind,
                                               HValue* allocation_site_payload,
                                               AllocationSiteMode mode) :
-        builder_(builder),
-        kind_(kind),
-        allocation_site_payload_(allocation_site_payload) {
+    builder_(builder),
+    kind_(kind),
+    allocation_site_payload_(allocation_site_payload),
+    constructor_function_(NULL) {
   if (mode == DONT_TRACK_ALLOCATION_SITE) {
     mode_ = mode;
   } else {
@@ -1778,6 +1779,17 @@ HGraphBuilder::JSArrayBuilder::JSArrayBuilder(HGraphBuilder* builder,
 }
 
 
+HGraphBuilder::JSArrayBuilder::JSArrayBuilder(HGraphBuilder* builder,
+                                              ElementsKind kind,
+                                              HValue* constructor_function) :
+    builder_(builder),
+    kind_(kind),
+    mode_(DONT_TRACK_ALLOCATION_SITE),
+    allocation_site_payload_(NULL),
+    constructor_function_(constructor_function) {
+}
+
+
 HValue* HGraphBuilder::JSArrayBuilder::EmitMapCode(HValue* context) {
   HInstruction* native_context = builder()->BuildGetNativeContext(context);
 
@@ -1795,6 +1807,16 @@ HValue* HGraphBuilder::JSArrayBuilder::EmitMapCode(HValue* context) {
 }
 
 
+HValue* HGraphBuilder::JSArrayBuilder::EmitInternalMapCode() {
+  // Find the map near the constructor function
+  HObjectAccess access = HObjectAccess::ForPrototypeOrInitialMap();
+  return AddInstruction(
+      builder()->BuildLoadNamedField(constructor_function_,
+                                     access,
+                                     Representation::Tagged()));
+}
+
+
 HValue* HGraphBuilder::JSArrayBuilder::EstablishAllocationSize(
     HValue* length_node) {
   HValue* context = builder()->environment()->LookupContext();
@@ -1881,7 +1903,12 @@ HValue* HGraphBuilder::JSArrayBuilder::AllocateArray(HValue* size_in_bytes,
   AddInstruction(new_object);
 
   // Fill in the fields: map, properties, length
-  HValue* map = EmitMapCode(context);
+  HValue* map;
+  if (constructor_function_ != NULL) {
+    map = EmitInternalMapCode();
+  } else {
+    map = EmitMapCode(context);
+  }
   elements_location_ = builder()->BuildJSArrayHeader(new_object,
                                                      map,
                                                      mode_,