Add pretenuring support to HAllocateObject.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index f25efbfbc3e44bdbaf7b84cf156fef687584967f..ec7570247bea6a3f402c293746b42b6386c046f9 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -9785,8 +9785,16 @@ void HOptimizedGraphBuilder::VisitCallNew(CallNew* expr) {
       constructor->shared()->CompleteInobjectSlackTracking();
     }
 
+    HAllocateObject::Flags flags = HAllocateObject::DefaultFlags();
+    if (FLAG_pretenure_hallocateobject &&
+        isolate()->heap()->ShouldGloballyPretenure()) {
+      flags = static_cast<HAllocateObject::Flags>(
+          flags | HAllocateObject::CAN_ALLOCATE_IN_OLD_POINTER_SPACE);
+    }
+
     // Replace the constructor function with a newly allocated receiver.
-    HInstruction* receiver = new(zone()) HAllocateObject(context, constructor);
+    HInstruction* receiver =
+        new(zone()) HAllocateObject(context, constructor, flags);
     // Index of the receiver from the top of the expression stack.
     const int receiver_index = argument_count - 1;
     AddInstruction(receiver);