Get rid of AllocationFlags::TAG_OBJECT

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index ff00cb9f019285b058e83ee2a3293ba18e25f52d..741ce0740e3c65a7f7e641b6cffad4fb9d6a580c 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -4748,15 +4748,15 @@ void FastNewObjectStub::Generate(MacroAssembler* masm) {
   __ bind(&done_allocate);
 
   // Initialize the JSObject fields.
-  __ sw(a2, MemOperand(v0, JSObject::kMapOffset));
+  __ sw(a2, FieldMemOperand(v0, JSObject::kMapOffset));
   __ LoadRoot(a3, Heap::kEmptyFixedArrayRootIndex);
-  __ sw(a3, MemOperand(v0, JSObject::kPropertiesOffset));
-  __ sw(a3, MemOperand(v0, JSObject::kElementsOffset));
+  __ sw(a3, FieldMemOperand(v0, JSObject::kPropertiesOffset));
+  __ sw(a3, FieldMemOperand(v0, JSObject::kElementsOffset));
   STATIC_ASSERT(JSObject::kHeaderSize == 3 * kPointerSize);
-  __ Addu(a1, v0, Operand(JSObject::kHeaderSize));
+  __ Addu(a1, v0, Operand(JSObject::kHeaderSize - kHeapObjectTag));
 
   // ----------- S t a t e -------------
-  //  -- v0 : result (untagged)
+  //  -- v0 : result (tagged)
   //  -- a1 : result fields (untagged)
   //  -- t1 : result end (untagged)
   //  -- a2 : initial map
@@ -4774,11 +4774,7 @@ void FastNewObjectStub::Generate(MacroAssembler* masm) {
   {
     // Initialize all in-object fields with undefined.
     __ InitializeFieldsWithFiller(a1, t1, a0);
-
-    // Add the object tag to make the JSObject real.
-    STATIC_ASSERT(kHeapObjectTag == 1);
-    __ Ret(USE_DELAY_SLOT);
-    __ Addu(v0, v0, Operand(kHeapObjectTag));  // In delay slot.
+    __ Ret();
   }
   __ bind(&slack_tracking);
   {
@@ -4801,9 +4797,7 @@ void FastNewObjectStub::Generate(MacroAssembler* masm) {
     Label finalize;
     STATIC_ASSERT(Map::kSlackTrackingCounterEnd == 1);
     __ And(a3, a3, Operand(Map::ConstructionCounter::kMask));
-    __ Branch(USE_DELAY_SLOT, &finalize, eq, a3, Operand(zero_reg));
-    STATIC_ASSERT(kHeapObjectTag == 1);
-    __ Addu(v0, v0, Operand(kHeapObjectTag));  // In delay slot.
+    __ Branch(&finalize, eq, a3, Operand(zero_reg));
     __ Ret();
 
     // Finalize the instance size.
@@ -4828,10 +4822,10 @@ void FastNewObjectStub::Generate(MacroAssembler* masm) {
     __ CallRuntime(Runtime::kAllocateInNewSpace);
     __ Pop(a2);
   }
-  STATIC_ASSERT(kHeapObjectTag == 1);
-  __ Subu(v0, v0, Operand(kHeapObjectTag));
   __ lbu(t1, FieldMemOperand(a2, Map::kInstanceSizeOffset));
   __ Lsa(t1, v0, t1, kPointerSizeLog2);
+  STATIC_ASSERT(kHeapObjectTag == 1);
+  __ Subu(t1, t1, Operand(kHeapObjectTag));
   __ jmp(&done_allocate);
 
   // Fall back to %NewObject.
@@ -4893,7 +4887,7 @@ void FastNewRestParameterStub::Generate(MacroAssembler* masm) {
 
     // Allocate an empty rest parameter array.
     Label allocate, done_allocate;
-    __ Allocate(JSArray::kSize, v0, a0, a1, &allocate, TAG_OBJECT);
+    __ Allocate(JSArray::kSize, v0, a0, a1, &allocate, NO_ALLOCATION_FLAGS);
     __ bind(&done_allocate);
 
     // Setup the rest parameter array in v0.
@@ -4935,7 +4929,7 @@ void FastNewRestParameterStub::Generate(MacroAssembler* masm) {
     Label allocate, done_allocate;
     __ li(a1, Operand(JSArray::kSize + FixedArray::kHeaderSize));
     __ Lsa(a1, a1, a0, kPointerSizeLog2 - 1);
-    __ Allocate(a1, v0, a3, t0, &allocate, TAG_OBJECT);
+    __ Allocate(a1, v0, a3, t0, &allocate, NO_ALLOCATION_FLAGS);
     __ bind(&done_allocate);
 
     // Setup the elements array in v0.
@@ -5069,7 +5063,7 @@ void FastNewSloppyArgumentsStub::Generate(MacroAssembler* masm) {
   __ Addu(t5, t5, Operand(JSSloppyArgumentsObject::kSize));
 
   // Do the allocation of all three objects in one go.
-  __ Allocate(t5, v0, t5, t0, &runtime, TAG_OBJECT);
+  __ Allocate(t5, v0, t5, t0, &runtime, NO_ALLOCATION_FLAGS);
 
   // v0 = address of new object(s) (tagged)
   // a2 = argument count (smi-tagged)
@@ -5271,7 +5265,7 @@ void FastNewStrictArgumentsStub::Generate(MacroAssembler* masm) {
   Label allocate, done_allocate;
   __ li(a1, Operand(JSStrictArgumentsObject::kSize + FixedArray::kHeaderSize));
   __ Lsa(a1, a1, a0, kPointerSizeLog2 - 1);
-  __ Allocate(a1, v0, a3, t0, &allocate, TAG_OBJECT);
+  __ Allocate(a1, v0, a3, t0, &allocate, NO_ALLOCATION_FLAGS);
   __ bind(&done_allocate);
 
   // Setup the elements array in v0.