[stubs] Port FastNewObjectStub to TF

src/arm/code-stubs-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 3347 matching lines @@
   Label fast_elements_case;
   __ cmp(r3, Operand(FAST_ELEMENTS));
   __ b(eq, &fast_elements_case);
   GenerateCase(masm, FAST_HOLEY_ELEMENTS);
 
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
-void FastNewObjectStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- r1 : target
-  //  -- r3 : new target
-  //  -- cp : context
-  //  -- lr : return address
-  // -----------------------------------
-  __ AssertFunction(r1);
-  __ AssertReceiver(r3);
-
-  // Verify that the new target is a JSFunction.
-  Label new_object;
-  __ CompareObjectType(r3, r2, r2, JS_FUNCTION_TYPE);
-  __ b(ne, &new_object);
-
-  // Load the initial map and verify that it's in fact a map.
-  __ ldr(r2, FieldMemOperand(r3, JSFunction::kPrototypeOrInitialMapOffset));
-  __ JumpIfSmi(r2, &new_object);
-  __ CompareObjectType(r2, r0, r0, MAP_TYPE);
-  __ b(ne, &new_object);
-
-  // Fall back to runtime if the target differs from the new target's
-  // initial map constructor.
-  __ ldr(r0, FieldMemOperand(r2, Map::kConstructorOrBackPointerOffset));
-  __ cmp(r0, r1);
-  __ b(ne, &new_object);
-
-  // Allocate the JSObject on the heap.
-  Label allocate, done_allocate;
-  __ ldrb(r4, FieldMemOperand(r2, Map::kInstanceSizeOffset));
-  __ Allocate(r4, r0, r5, r6, &allocate, SIZE_IN_WORDS);
-  __ bind(&done_allocate);
-
-  // Initialize the JSObject fields.
-  __ str(r2, FieldMemOperand(r0, JSObject::kMapOffset));
-  __ LoadRoot(r3, Heap::kEmptyFixedArrayRootIndex);
-  __ str(r3, FieldMemOperand(r0, JSObject::kPropertiesOffset));
-  __ str(r3, FieldMemOperand(r0, JSObject::kElementsOffset));
-  STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize);
-  __ add(r1, r0, Operand(JSObject::kHeaderSize - kHeapObjectTag));
-
-  // ----------- S t a t e -------------
-  //  -- r0 : result (tagged)
-  //  -- r1 : result fields (untagged)
-  //  -- r5 : result end (untagged)
-  //  -- r2 : initial map
-  //  -- cp : context
-  //  -- lr : return address
-  // -----------------------------------
-
-  // Perform in-object slack tracking if requested.
-  Label slack_tracking;
-  STATIC_ASSERT(Map::kNoSlackTracking == 0);
-  __ LoadRoot(r6, Heap::kUndefinedValueRootIndex);
-  __ ldr(r3, FieldMemOperand(r2, Map::kBitField3Offset));
-  __ tst(r3, Operand(Map::ConstructionCounter::kMask));
-  __ b(ne, &slack_tracking);
-  {
-    // Initialize all in-object fields with undefined.
-    __ InitializeFieldsWithFiller(r1, r5, r6);
-    __ Ret();
-  }
-  __ bind(&slack_tracking);
-  {
-    // Decrease generous allocation count.
-    STATIC_ASSERT(Map::ConstructionCounter::kNext == 32);
-    __ sub(r3, r3, Operand(1 << Map::ConstructionCounter::kShift));
-    __ str(r3, FieldMemOperand(r2, Map::kBitField3Offset));
-
-    // Initialize the in-object fields with undefined.
-    __ ldrb(r4, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset));
-    __ sub(r4, r5, Operand(r4, LSL, kPointerSizeLog2));
-    __ InitializeFieldsWithFiller(r1, r4, r6);
-
-    // Initialize the remaining (reserved) fields with one pointer filler map.
-    __ LoadRoot(r6, Heap::kOnePointerFillerMapRootIndex);
-    __ InitializeFieldsWithFiller(r1, r5, r6);
-
-    // Check if we can finalize the instance size.
-    STATIC_ASSERT(Map::kSlackTrackingCounterEnd == 1);
-    __ tst(r3, Operand(Map::ConstructionCounter::kMask));
-    __ Ret(ne);
-
-    // Finalize the instance size.
-    {
-      FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
-      __ Push(r0, r2);
-      __ CallRuntime(Runtime::kFinalizeInstanceSize);
-      __ Pop(r0);
-    }
-    __ Ret();
-  }
-
-  // Fall back to %AllocateInNewSpace.
-  __ bind(&allocate);
-  {
-    FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
-    STATIC_ASSERT(kSmiTag == 0);
-    STATIC_ASSERT(kSmiTagSize == 1);
-    __ mov(r4, Operand(r4, LSL, kPointerSizeLog2 + 1));
-    __ Push(r2, r4);
-    __ CallRuntime(Runtime::kAllocateInNewSpace);
-    __ Pop(r2);
-  }
-  __ ldrb(r5, FieldMemOperand(r2, Map::kInstanceSizeOffset));
-  __ add(r5, r0, Operand(r5, LSL, kPointerSizeLog2));
-  STATIC_ASSERT(kHeapObjectTag == 1);
-  __ sub(r5, r5, Operand(kHeapObjectTag));
-  __ b(&done_allocate);
-
-  // Fall back to %NewObject.
-  __ bind(&new_object);
-  __ Push(r1, r3);
-  __ TailCallRuntime(Runtime::kNewObject);
-}
-
-
 void FastNewRestParameterStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r1 : function
   //  -- cp : context
   //  -- fp : frame pointer
   //  -- lr : return address
   // -----------------------------------
   __ AssertFunction(r1);
 
   // Make r2 point to the JavaScript frame.
@@ skipping 783 matching lines @@
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,
                            kStackUnwindSpace, NULL, return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM