Hydrogen stubs for array constructors

src/x64/builtins-x64.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 1269 matching lines @@
 //   rdi: constructor (built-in Array function)
 //   rax: argc
 //   rsp[0]: return address
 //   rsp[8]: last argument
 // This function is used for both construct and normal calls of Array. The only
 // difference between handling a construct call and a normal call is that for a
 // construct call the constructor function in rdi needs to be preserved for
 // entering the generic code. In both cases argc in rax needs to be preserved.
 // Both registers are preserved by this code so no need to differentiate between
 // a construct call and a normal call.
-static void ArrayNativeCode(MacroAssembler* masm,
-                            Label* call_generic_code) {
+void ArrayNativeCode(MacroAssembler* masm, Label* call_generic_code) {
   Label argc_one_or_more, argc_two_or_more, empty_array, not_empty_array,
       has_non_smi_element, finish, cant_transition_map, not_double;
 
   // Check for array construction with zero arguments.
   __ testq(rax, rax);
   __ j(not_zero, &argc_one_or_more);
 
   __ bind(&empty_array);
   // Handle construction of an empty array.
   AllocateEmptyJSArray(masm,
@@ skipping 213 matching lines @@
 
   // Jump to the generic array code in case the specialized code cannot handle
   // the construction.
   __ bind(&generic_array_code);
   Handle<Code> array_code =
       masm->isolate()->builtins()->ArrayCodeGeneric();
   __ Jump(array_code, RelocInfo::CODE_TARGET);
 }
 
 
-void Builtins::Generate_ArrayConstructCode(MacroAssembler* masm) {
+void Builtins::Generate_CommonArrayConstructCode(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax : argc
   //  -- rdi : constructor
   //  -- rsp[0] : return address
   //  -- rsp[8] : last argument
   // -----------------------------------
   if (FLAG_debug_code) {
     // The array construct code is only set for the builtin and internal
     // Array functions which always have a map.
 
     // Initial map for the builtin Array function should be a map.
     __ movq(rcx, FieldOperand(rdi, JSFunction::kPrototypeOrInitialMapOffset));
     // Will both indicate a NULL and a Smi.
     STATIC_ASSERT(kSmiTag == 0);
     Condition not_smi = NegateCondition(masm->CheckSmi(rcx));
     __ Check(not_smi, "Unexpected initial map for Array function");
     __ CmpObjectType(rcx, MAP_TYPE, rcx);
     __ Check(equal, "Unexpected initial map for Array function");
-
-    if (FLAG_optimize_constructed_arrays) {
-      // We should either have undefined in ebx or a valid jsglobalpropertycell
-      Label okay_here;
-      Handle<Object> undefined_sentinel(
-          masm->isolate()->factory()->undefined_value());
-      Handle<Map> global_property_cell_map(
-          masm->isolate()->heap()->global_property_cell_map());
-      __ Cmp(rbx, undefined_sentinel);
-      __ j(equal, &okay_here);
-      __ Cmp(FieldOperand(rbx, 0), global_property_cell_map);
-      __ Assert(equal, "Expected property cell in register rbx");
-      __ bind(&okay_here);
-    }
   }
 
-  if (FLAG_optimize_constructed_arrays) {
-    Label not_zero_case, not_one_case;
-    __ testq(rax, rax);
-    __ j(not_zero, &not_zero_case);
-    ArrayNoArgumentConstructorStub no_argument_stub;
-    __ TailCallStub(&no_argument_stub);
+  Label generic_constructor;
+  // Run the native code for the Array function called as constructor.
+  ArrayNativeCode(masm, &generic_constructor);
+  // Jump to the generic construct code in case the specialized code cannot
+  // handle the construction.
+  __ bind(&generic_constructor);
+  Handle<Code> generic_construct_stub =
+      masm->isolate()->builtins()->JSConstructStubGeneric();
+  __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
+}
 
-    __ bind(&not_zero_case);
-    __ cmpq(rax, Immediate(1));
-    __ j(greater, &not_one_case);
-    ArraySingleArgumentConstructorStub single_argument_stub;
-    __ TailCallStub(&single_argument_stub);
-
-    __ bind(&not_one_case);
-    ArrayNArgumentsConstructorStub n_argument_stub;
-    __ TailCallStub(&n_argument_stub);
-  } else {
-    Label generic_constructor;
-    // Run the native code for the Array function called as constructor.
-    ArrayNativeCode(masm, &generic_constructor);
-
-    // Jump to the generic construct code in case the specialized code cannot
-    // handle the construction.
-    __ bind(&generic_constructor);
-    Handle<Code> generic_construct_stub =
-        masm->isolate()->builtins()->JSConstructStubGeneric();
-    __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
-  }
-}
 
 
 void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- rax                 : number of arguments
   //  -- rdi                 : constructor function
   //  -- rsp[0]              : return address
   //  -- rsp[(argc - n) * 8] : arg[n] (zero-based)
   //  -- rsp[(argc + 1) * 8] : receiver
   // -----------------------------------
@@ skipping 265 matching lines @@
   Deoptimizer::EntryGenerator generator(masm, Deoptimizer::OSR);
   generator.Generate();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64