[stubs] Port FastNewObjectStub to TF

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index a0d76c160f89334f84bc0e26ebdba46949cc232c..6379a5188de37b90717c6e4504dc675cc4bdaac6 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -3567,128 +3567,6 @@ void InternalArrayConstructorStub::Generate(MacroAssembler* masm) {
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
-
-void FastNewObjectStub::Generate(MacroAssembler* masm) {
-  // ----------- S t a t e -------------
-  //  -- a1 : target
-  //  -- a3 : new target
-  //  -- cp : context
-  //  -- ra : return address
-  // -----------------------------------
-  __ AssertFunction(a1);
-  __ AssertReceiver(a3);
-
-  // Verify that the new target is a JSFunction.
-  Label new_object;
-  __ GetObjectType(a3, a2, a2);
-  __ Branch(&new_object, ne, a2, Operand(JS_FUNCTION_TYPE));
-
-  // Load the initial map and verify that it's in fact a map.
-  __ ld(a2, FieldMemOperand(a3, JSFunction::kPrototypeOrInitialMapOffset));
-  __ JumpIfSmi(a2, &new_object);
-  __ GetObjectType(a2, a0, a0);
-  __ Branch(&new_object, ne, a0, Operand(MAP_TYPE));
-
-  // Fall back to runtime if the target differs from the new target's
-  // initial map constructor.
-  __ ld(a0, FieldMemOperand(a2, Map::kConstructorOrBackPointerOffset));
-  __ Branch(&new_object, ne, a0, Operand(a1));
-
-  // Allocate the JSObject on the heap.
-  Label allocate, done_allocate;
-  __ lbu(a4, FieldMemOperand(a2, Map::kInstanceSizeOffset));
-  __ Allocate(a4, v0, a5, a0, &allocate, SIZE_IN_WORDS);
-  __ bind(&done_allocate);
-
-  // Initialize the JSObject fields.
-  __ sd(a2, FieldMemOperand(v0, JSObject::kMapOffset));
-  __ LoadRoot(a3, Heap::kEmptyFixedArrayRootIndex);
-  __ sd(a3, FieldMemOperand(v0, JSObject::kPropertiesOffset));
-  __ sd(a3, FieldMemOperand(v0, JSObject::kElementsOffset));
-  STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize);
-  __ Daddu(a1, v0, Operand(JSObject::kHeaderSize - kHeapObjectTag));
-
-  // ----------- S t a t e -------------
-  //  -- v0 : result (tagged)
-  //  -- a1 : result fields (untagged)
-  //  -- a5 : result end (untagged)
-  //  -- a2 : initial map
-  //  -- cp : context
-  //  -- ra : return address
-  // -----------------------------------
-
-  // Perform in-object slack tracking if requested.
-  Label slack_tracking;
-  STATIC_ASSERT(Map::kNoSlackTracking == 0);
-  __ lwu(a3, FieldMemOperand(a2, Map::kBitField3Offset));
-  __ And(at, a3, Operand(Map::ConstructionCounter::kMask));
-  __ Branch(USE_DELAY_SLOT, &slack_tracking, ne, at, Operand(zero_reg));
-  __ LoadRoot(a0, Heap::kUndefinedValueRootIndex);  // In delay slot.
-  {
-    // Initialize all in-object fields with undefined.
-    __ InitializeFieldsWithFiller(a1, a5, a0);
-    __ Ret();
-  }
-  __ bind(&slack_tracking);
-  {
-    // Decrease generous allocation count.
-    STATIC_ASSERT(Map::ConstructionCounter::kNext == 32);
-    __ Subu(a3, a3, Operand(1 << Map::ConstructionCounter::kShift));
-    __ sw(a3, FieldMemOperand(a2, Map::kBitField3Offset));
-
-    // Initialize the in-object fields with undefined.
-    __ lbu(a4, FieldMemOperand(a2, Map::kUnusedPropertyFieldsOffset));
-    __ dsll(a4, a4, kPointerSizeLog2);
-    __ Dsubu(a4, a5, a4);
-    __ InitializeFieldsWithFiller(a1, a4, a0);
-
-    // Initialize the remaining (reserved) fields with one pointer filler map.
-    __ LoadRoot(a0, Heap::kOnePointerFillerMapRootIndex);
-    __ InitializeFieldsWithFiller(a1, a5, a0);
-
-    // Check if we can finalize the instance size.
-    Label finalize;
-    STATIC_ASSERT(Map::kSlackTrackingCounterEnd == 1);
-    __ And(a3, a3, Operand(Map::ConstructionCounter::kMask));
-    __ Branch(&finalize, eq, a3, Operand(zero_reg));
-    __ Ret();
-
-    // Finalize the instance size.
-    __ bind(&finalize);
-    {
-      FrameScope scope(masm, StackFrame::INTERNAL);
-      __ Push(v0, a2);
-      __ CallRuntime(Runtime::kFinalizeInstanceSize);
-      __ Pop(v0);
-    }
-    __ Ret();
-  }
-
-  // Fall back to %AllocateInNewSpace.
-  __ bind(&allocate);
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    STATIC_ASSERT(kSmiTag == 0);
-    STATIC_ASSERT(kSmiTagSize == 1);
-    __ dsll(a4, a4, kPointerSizeLog2 + kSmiShiftSize + kSmiTagSize);
-    __ SmiTag(a4);
-    __ Push(a2, a4);
-    __ CallRuntime(Runtime::kAllocateInNewSpace);
-    __ Pop(a2);
-  }
-  __ lbu(a5, FieldMemOperand(a2, Map::kInstanceSizeOffset));
-  __ Dlsa(a5, v0, a5, kPointerSizeLog2);
-  STATIC_ASSERT(kHeapObjectTag == 1);
-  __ Dsubu(a5, a5, Operand(kHeapObjectTag));
-  __ jmp(&done_allocate);
-
-  // Fall back to %NewObject.
-  __ bind(&new_object);
-  __ Push(a1, a3);
-  __ TailCallRuntime(Runtime::kNewObject);
-}
-
-
 void FastNewRestParameterStub::Generate(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a1 : function