Get rid of AllocationFlags::TAG_OBJECT

src/crankshaft/mips64/lithium-codegen-mips64.cc

Index: src/crankshaft/mips64/lithium-codegen-mips64.cc
diff --git a/src/crankshaft/mips64/lithium-codegen-mips64.cc b/src/crankshaft/mips64/lithium-codegen-mips64.cc
index 972d50dfd0539a2df31db59fb7cc00fec8322e85..1757a24f4f81c0fdab98a279394feb9e6c3957d6 100644
--- a/src/crankshaft/mips64/lithium-codegen-mips64.cc
+++ b/src/crankshaft/mips64/lithium-codegen-mips64.cc
@@ -4645,7 +4645,7 @@ void LCodeGen::DoDeferredNumberTagIU(LInstruction* instr,
 
   if (FLAG_inline_new) {
     __ LoadRoot(tmp3, Heap::kHeapNumberMapRootIndex);
-    __ AllocateHeapNumber(dst, tmp1, tmp2, tmp3, &slow, TAG_RESULT);
+    __ AllocateHeapNumber(dst, tmp1, tmp2, tmp3, &slow);
     __ Branch(&done);
   }
 
@@ -4700,15 +4700,12 @@ void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
   if (FLAG_inline_new) {
     __ LoadRoot(scratch, Heap::kHeapNumberMapRootIndex);
     // We want the untagged address first for performance
-    __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry(),
-                          DONT_TAG_RESULT);
+    __ AllocateHeapNumber(reg, temp1, temp2, scratch, deferred->entry());
   } else {
     __ Branch(deferred->entry());
   }
   __ bind(deferred->exit());
-  __ sdc1(input_reg, MemOperand(reg, HeapNumber::kValueOffset));
-  // Now that we have finished with the object's real address tag it
-  __ Daddu(reg, reg, kHeapObjectTag);
+  __ sdc1(input_reg, FieldMemOperand(reg, HeapNumber::kValueOffset));
 }
 
 
@@ -4729,7 +4726,6 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
   __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
   RecordSafepointWithRegisters(
       instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);
-  __ Dsubu(v0, v0, kHeapObjectTag);
   __ StoreToSafepointRegisterSlot(v0, reg);
 }
 
@@ -5276,7 +5272,7 @@ void LCodeGen::DoAllocate(LAllocate* instr) {
   Register scratch2 = ToRegister(instr->temp2());
 
   // Allocate memory for the object.
-  AllocationFlags flags = TAG_OBJECT;
+  AllocationFlags flags = NO_ALLOCATION_FLAGS;
   if (instr->hydrogen()->MustAllocateDoubleAligned()) {
     flags = static_cast<AllocationFlags>(flags | DOUBLE_ALIGNMENT);
   }