Remove hand-written assembly ArrayPush stubs

src/arm64/code-stubs-arm64.cc

 // Copyright 2013 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 4387 matching lines @@
   //  sp[0] = right string
   //  sp[8] = left string.
   __ Push(left, right);
 
   // Call the runtime.
   // Returns -1 (less), 0 (equal), or 1 (greater) tagged as a small integer.
   __ TailCallRuntime(Runtime::kHiddenStringCompare, 2, 1);
 }
 
 
-void ArrayPushStub::Generate(MacroAssembler* masm) {
-  Register receiver = x0;
-
-  int argc = arguments_count();
-
-  if (argc == 0) {
-    // Nothing to do, just return the length.
-    __ Ldr(x0, FieldMemOperand(receiver, JSArray::kLengthOffset));
-    __ Drop(argc + 1);
-    __ Ret();
-    return;
-  }
-
-  Isolate* isolate = masm->isolate();
-
-  if (argc != 1) {
-    __ TailCallExternalReference(
-        ExternalReference(Builtins::c_ArrayPush, isolate), argc + 1, 1);
-    return;
-  }
-
-  Label call_builtin, attempt_to_grow_elements, with_write_barrier;
-
-  Register elements_length = x8;
-  Register length = x7;
-  Register elements = x6;
-  Register end_elements = x5;
-  Register value = x4;
-  // Get the elements array of the object.
-  __ Ldr(elements, FieldMemOperand(receiver, JSArray::kElementsOffset));
-
-  if (IsFastSmiOrObjectElementsKind(elements_kind())) {
-    // Check that the elements are in fast mode and writable.
-    __ CheckMap(elements,
-                x10,
-                Heap::kFixedArrayMapRootIndex,
-                &call_builtin,
-                DONT_DO_SMI_CHECK);
-  }
-
-  // Get the array's length and calculate new length.
-  __ Ldr(length, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  STATIC_ASSERT(kSmiTag == 0);
-  __ Add(length, length, Smi::FromInt(argc));
-
-  // Check if we could survive without allocation.
-  __ Ldr(elements_length,
-         FieldMemOperand(elements, FixedArray::kLengthOffset));
-  __ Cmp(length, elements_length);
-
-  const int kEndElementsOffset =
-      FixedArray::kHeaderSize - kHeapObjectTag - argc * kPointerSize;
-
-  if (IsFastSmiOrObjectElementsKind(elements_kind())) {
-    __ B(gt, &attempt_to_grow_elements);
-
-    // Check if value is a smi.
-    __ Peek(value, (argc - 1) * kPointerSize);
-    __ JumpIfNotSmi(value, &with_write_barrier);
-
-    // Store the value.
-    // We may need a register containing the address end_elements below,
-    // so write back the value in end_elements.
-    __ Add(end_elements, elements,
-           Operand::UntagSmiAndScale(length, kPointerSizeLog2));
-    __ Str(value, MemOperand(end_elements, kEndElementsOffset, PreIndex));
-  } else {
-    __ B(gt, &call_builtin);
-
-    __ Peek(value, (argc - 1) * kPointerSize);
-    __ StoreNumberToDoubleElements(value, length, elements, x10, d0, d1,
-                                   &call_builtin, argc * kDoubleSize);
-  }
-
-  // Save new length.
-  __ Str(length, FieldMemOperand(receiver, JSArray::kLengthOffset));
-
-  // Return length.
-  __ Drop(argc + 1);
-  __ Mov(x0, length);
-  __ Ret();
-
-  if (IsFastDoubleElementsKind(elements_kind())) {
-    __ Bind(&call_builtin);
-    __ TailCallExternalReference(
-        ExternalReference(Builtins::c_ArrayPush, isolate), argc + 1, 1);
-    return;
-  }
-
-  __ Bind(&with_write_barrier);
-
-  if (IsFastSmiElementsKind(elements_kind())) {
-    if (FLAG_trace_elements_transitions) {
-      __ B(&call_builtin);
-    }
-
-    __ Ldr(x10, FieldMemOperand(value, HeapObject::kMapOffset));
-    __ JumpIfHeapNumber(x10, &call_builtin);
-
-    ElementsKind target_kind = IsHoleyElementsKind(elements_kind())
-        ? FAST_HOLEY_ELEMENTS : FAST_ELEMENTS;
-    __ Ldr(x10, GlobalObjectMemOperand());
-    __ Ldr(x10, FieldMemOperand(x10, GlobalObject::kNativeContextOffset));
-    __ Ldr(x10, ContextMemOperand(x10, Context::JS_ARRAY_MAPS_INDEX));
-    const int header_size = FixedArrayBase::kHeaderSize;
-    // Verify that the object can be transitioned in place.
-    const int origin_offset = header_size + elements_kind() * kPointerSize;
-    __ ldr(x11, FieldMemOperand(receiver, origin_offset));
-    __ ldr(x12, FieldMemOperand(x10, HeapObject::kMapOffset));
-    __ cmp(x11, x12);
-    __ B(ne, &call_builtin);
-
-    const int target_offset = header_size + target_kind * kPointerSize;
-    __ Ldr(x10, FieldMemOperand(x10, target_offset));
-    __ Mov(x11, receiver);
-    ElementsTransitionGenerator::GenerateMapChangeElementsTransition(
-        masm, DONT_TRACK_ALLOCATION_SITE, NULL);
-  }
-
-  // Save new length.
-  __ Str(length, FieldMemOperand(receiver, JSArray::kLengthOffset));
-
-  // Store the value.
-  // We may need a register containing the address end_elements below,
-  // so write back the value in end_elements.
-  __ Add(end_elements, elements,
-         Operand::UntagSmiAndScale(length, kPointerSizeLog2));
-  __ Str(value, MemOperand(end_elements, kEndElementsOffset, PreIndex));
-
-  __ RecordWrite(elements,
-                 end_elements,
-                 value,
-                 kLRHasNotBeenSaved,
-                 kDontSaveFPRegs,
-                 EMIT_REMEMBERED_SET,
-                 OMIT_SMI_CHECK);
-  __ Drop(argc + 1);
-  __ Mov(x0, length);
-  __ Ret();
-
-  __ Bind(&attempt_to_grow_elements);
-
-  if (!FLAG_inline_new) {
-    __ B(&call_builtin);
-  }
-
-  Register argument = x2;
-  __ Peek(argument, (argc - 1) * kPointerSize);
-  // Growing elements that are SMI-only requires special handling in case
-  // the new element is non-Smi. For now, delegate to the builtin.
-  if (IsFastSmiElementsKind(elements_kind())) {
-    __ JumpIfNotSmi(argument, &call_builtin);
-  }
-
-  // We could be lucky and the elements array could be at the top of new-space.
-  // In this case we can just grow it in place by moving the allocation pointer
-  // up.
-  ExternalReference new_space_allocation_top =
-      ExternalReference::new_space_allocation_top_address(isolate);
-  ExternalReference new_space_allocation_limit =
-      ExternalReference::new_space_allocation_limit_address(isolate);
-
-  const int kAllocationDelta = 4;
-  ASSERT(kAllocationDelta >= argc);
-  Register allocation_top_addr = x5;
-  Register allocation_top = x9;
-  // Load top and check if it is the end of elements.
-  __ Add(end_elements, elements,
-         Operand::UntagSmiAndScale(length, kPointerSizeLog2));
-  __ Add(end_elements, end_elements, kEndElementsOffset);
-  __ Mov(allocation_top_addr, new_space_allocation_top);
-  __ Ldr(allocation_top, MemOperand(allocation_top_addr));
-  __ Cmp(end_elements, allocation_top);
-  __ B(ne, &call_builtin);
-
-  __ Mov(x10, new_space_allocation_limit);
-  __ Ldr(x10, MemOperand(x10));
-  __ Add(allocation_top, allocation_top, kAllocationDelta * kPointerSize);
-  __ Cmp(allocation_top, x10);
-  __ B(hi, &call_builtin);
-
-  // We fit and could grow elements.
-  // Update new_space_allocation_top.
-  __ Str(allocation_top, MemOperand(allocation_top_addr));
-  // Push the argument.
-  __ Str(argument, MemOperand(end_elements));
-  // Fill the rest with holes.
-  __ LoadRoot(x10, Heap::kTheHoleValueRootIndex);
-  ASSERT(kAllocationDelta == 4);
-  __ Stp(x10, x10, MemOperand(end_elements, 1 * kPointerSize));
-  __ Stp(x10, x10, MemOperand(end_elements, 3 * kPointerSize));
-
-  // Update elements' and array's sizes.
-  __ Str(length, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ Add(elements_length, elements_length, Smi::FromInt(kAllocationDelta));
-  __ Str(elements_length,
-         FieldMemOperand(elements, FixedArray::kLengthOffset));
-
-  // Elements are in new space, so write barrier is not required.
-  __ Drop(argc + 1);
-  __ Mov(x0, length);
-  __ Ret();
-
-  __ Bind(&call_builtin);
-  __ TailCallExternalReference(
-      ExternalReference(Builtins::c_ArrayPush, isolate), argc + 1, 1);
-}
-
-
 void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- x1    : left
   //  -- x0    : right
   //  -- lr    : return address
   // -----------------------------------
   Isolate* isolate = masm->isolate();
 
   // Load x2 with the allocation site.  We stick an undefined dummy value here
   // and replace it with the real allocation site later when we instantiate this
@@ skipping 1106 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64