Remove hand-written assembly ArrayPush stubs

src/mips/code-stubs-mips.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 3981 matching lines @@
   // Compare flat ASCII strings natively. Remove arguments from stack first.
   __ IncrementCounter(counters->string_compare_native(), 1, a2, a3);
   __ Addu(sp, sp, Operand(2 * kPointerSize));
   GenerateCompareFlatAsciiStrings(masm, a1, a0, a2, a3, t0, t1);
 
   __ bind(&runtime);
   __ TailCallRuntime(Runtime::kHiddenStringCompare, 2, 1);
 }
 
 
-void ArrayPushStub::Generate(MacroAssembler* masm) {
-  Register receiver = a0;
-  Register scratch = a1;
-
-  int argc = arguments_count();
-
-  if (argc == 0) {
-    // Nothing to do, just return the length.
-    __ lw(v0, FieldMemOperand(receiver, JSArray::kLengthOffset));
-    __ DropAndRet(argc + 1);
-    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 = t2;
-  Register end_elements = t1;
-  // Get the elements array of the object.
-  __ lw(elements, FieldMemOperand(receiver, JSArray::kElementsOffset));
-
-  if (IsFastSmiOrObjectElementsKind(elements_kind())) {
-    // Check that the elements are in fast mode and writable.
-    __ CheckMap(elements,
-                scratch,
-                Heap::kFixedArrayMapRootIndex,
-                &call_builtin,
-                DONT_DO_SMI_CHECK);
-  }
-
-  // Get the array's length into scratch and calculate new length.
-  __ lw(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ Addu(scratch, scratch, Operand(Smi::FromInt(argc)));
-
-  // Get the elements' length.
-  __ lw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset));
-
-  const int kEndElementsOffset =
-      FixedArray::kHeaderSize - kHeapObjectTag - argc * kPointerSize;
-
-  if (IsFastSmiOrObjectElementsKind(elements_kind())) {
-    // Check if we could survive without allocation.
-    __ Branch(&attempt_to_grow_elements, gt, scratch, Operand(t0));
-
-    // Check if value is a smi.
-    __ lw(t0, MemOperand(sp, (argc - 1) * kPointerSize));
-    __ JumpIfNotSmi(t0, &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.
-    __ sll(end_elements, scratch, kPointerSizeLog2 - kSmiTagSize);
-    __ Addu(end_elements, elements, end_elements);
-    __ Addu(end_elements, end_elements, kEndElementsOffset);
-    __ sw(t0, MemOperand(end_elements));
-  } else {
-    // Check if we could survive without allocation.
-    __ Branch(&call_builtin, gt, scratch, Operand(t0));
-
-    __ lw(t0, MemOperand(sp, (argc - 1) * kPointerSize));
-    __ StoreNumberToDoubleElements(t0, scratch, elements, a3, t1, a2,
-                                   &call_builtin, argc * kDoubleSize);
-  }
-
-  // Save new length.
-  __ sw(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ mov(v0, scratch);
-  __ DropAndRet(argc + 1);
-
-  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) __ jmp(&call_builtin);
-
-    __ lw(t3, FieldMemOperand(t0, HeapObject::kMapOffset));
-    __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
-    __ Branch(&call_builtin, eq, t3, Operand(at));
-
-    ElementsKind target_kind = IsHoleyElementsKind(elements_kind())
-        ? FAST_HOLEY_ELEMENTS : FAST_ELEMENTS;
-    __ lw(a3, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
-    __ lw(a3, FieldMemOperand(a3, GlobalObject::kNativeContextOffset));
-    __ lw(a3, ContextOperand(a3, 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;
-    __ lw(a2, FieldMemOperand(receiver, origin_offset));
-    __ lw(at, FieldMemOperand(a3, HeapObject::kMapOffset));
-    __ Branch(&call_builtin, ne, a2, Operand(at));
-
-
-    const int target_offset = header_size + target_kind * kPointerSize;
-    __ lw(a3, FieldMemOperand(a3, target_offset));
-    __ mov(a2, receiver);
-    ElementsTransitionGenerator::GenerateMapChangeElementsTransition(
-        masm, DONT_TRACK_ALLOCATION_SITE, NULL);
-  }
-
-  // Save new length.
-  __ sw(scratch, 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.
-  __ sll(end_elements, scratch, kPointerSizeLog2 - kSmiTagSize);
-  __ Addu(end_elements, elements, end_elements);
-  __ Addu(end_elements, end_elements, kEndElementsOffset);
-  __ sw(t0, MemOperand(end_elements));
-
-  __ RecordWrite(elements,
-                 end_elements,
-                 t0,
-                 kRAHasNotBeenSaved,
-                 kDontSaveFPRegs,
-                 EMIT_REMEMBERED_SET,
-                 OMIT_SMI_CHECK);
-  __ mov(v0, scratch);
-  __ DropAndRet(argc + 1);
-
-  __ bind(&attempt_to_grow_elements);
-  // scratch: array's length + 1.
-
-  if (!FLAG_inline_new) {
-    __ bind(&call_builtin);
-    __ TailCallExternalReference(
-        ExternalReference(Builtins::c_ArrayPush, isolate), argc + 1, 1);
-    return;
-  }
-
-  __ lw(a2, MemOperand(sp, (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(a2, &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);
-  // Load top and check if it is the end of elements.
-  __ sll(end_elements, scratch, kPointerSizeLog2 - kSmiTagSize);
-  __ Addu(end_elements, elements, end_elements);
-  __ Addu(end_elements, end_elements, Operand(kEndElementsOffset));
-  __ li(t0, Operand(new_space_allocation_top));
-  __ lw(a3, MemOperand(t0));
-  __ Branch(&call_builtin, ne, a3, Operand(end_elements));
-
-  __ li(t3, Operand(new_space_allocation_limit));
-  __ lw(t3, MemOperand(t3));
-  __ Addu(a3, a3, Operand(kAllocationDelta * kPointerSize));
-  __ Branch(&call_builtin, hi, a3, Operand(t3));
-
-  // We fit and could grow elements.
-  // Update new_space_allocation_top.
-  __ sw(a3, MemOperand(t0));
-  // Push the argument.
-  __ sw(a2, MemOperand(end_elements));
-  // Fill the rest with holes.
-  __ LoadRoot(a3, Heap::kTheHoleValueRootIndex);
-  for (int i = 1; i < kAllocationDelta; i++) {
-    __ sw(a3, MemOperand(end_elements, i * kPointerSize));
-  }
-
-  // Update elements' and array's sizes.
-  __ sw(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
-  __ lw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset));
-  __ Addu(t0, t0, Operand(Smi::FromInt(kAllocationDelta)));
-  __ sw(t0, FieldMemOperand(elements, FixedArray::kLengthOffset));
-
-  // Elements are in new space, so write barrier is not required.
-  __ mov(v0, scratch);
-  __ DropAndRet(argc + 1);
-
-  __ bind(&call_builtin);
-  __ TailCallExternalReference(
-      ExternalReference(Builtins::c_ArrayPush, isolate), argc + 1, 1);
-}
-
-
 void BinaryOpICWithAllocationSiteStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a1    : left
   //  -- a0    : right
   //  -- ra    : return address
   // -----------------------------------
   Isolate* isolate = masm->isolate();
 
   // Load a2 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 1432 matching lines @@
                               MemOperand(fp, 6 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS