Introduce a code stub version of Array.prototype.push

src/crankshaft/hydrogen-instructions.h

Index: src/crankshaft/hydrogen-instructions.h
diff --git a/src/crankshaft/hydrogen-instructions.h b/src/crankshaft/hydrogen-instructions.h
index 4035e79d844db2a67ba6321cc554a127e9d8eb0d..f952401f69d67ea95423513818f179e6ac9a5f4c 100644
--- a/src/crankshaft/hydrogen-instructions.h
+++ b/src/crankshaft/hydrogen-instructions.h
@@ -3826,6 +3826,7 @@ class HApplyArguments final : public HTemplateInstruction<4> {
 class HArgumentsElements final : public HTemplateInstruction<0> {
  public:
   DECLARE_INSTRUCTION_FACTORY_P1(HArgumentsElements, bool);
+  DECLARE_INSTRUCTION_FACTORY_P2(HArgumentsElements, bool, bool);
 
   DECLARE_CONCRETE_INSTRUCTION(ArgumentsElements)
 
@@ -3834,12 +3835,14 @@ class HArgumentsElements final : public HTemplateInstruction<0> {
   }
 
   bool from_inlined() const { return from_inlined_; }
+  bool arguments_adaptor() const { return arguments_adaptor_; }
 
  protected:
   bool DataEquals(HValue* other) override { return true; }
 
  private:
-  explicit HArgumentsElements(bool from_inlined) : from_inlined_(from_inlined) {
+  explicit HArgumentsElements(bool from_inlined, bool arguments_adaptor = true)
+      : from_inlined_(from_inlined), arguments_adaptor_(arguments_adaptor) {
     // The value produced by this instruction is a pointer into the stack
     // that looks as if it was a smi because of alignment.
     set_representation(Representation::Tagged());
@@ -3849,6 +3852,7 @@ class HArgumentsElements final : public HTemplateInstruction<0> {
   bool IsDeletable() const override { return true; }
 
   bool from_inlined_;
+  bool arguments_adaptor_;
 };
 
 
@@ -5854,6 +5858,10 @@ class HObjectAccess final {
                          Representation::Integer32());
   }
 
+  static HObjectAccess ForMapDescriptors() {
+    return HObjectAccess(kInobject, Map::kDescriptorsOffset);
+  }
+
   static HObjectAccess ForNameHashField() {
     return HObjectAccess(kInobject,
                          Name::kHashFieldOffset,