Get rid of AllocationFlags::TAG_OBJECT

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

Index: src/crankshaft/arm/lithium-codegen-arm.cc
diff --git a/src/crankshaft/arm/lithium-codegen-arm.cc b/src/crankshaft/arm/lithium-codegen-arm.cc
index 26b852039b67bf4be382f4cc7f22c9ceb811daaf..a282d9ba1647a7115dc66ef0db18ff9b24fdf141 100644
--- a/src/crankshaft/arm/lithium-codegen-arm.cc
+++ b/src/crankshaft/arm/lithium-codegen-arm.cc
@@ -4496,7 +4496,7 @@ void LCodeGen::DoDeferredNumberTagIU(LInstruction* instr,
 
   if (FLAG_inline_new) {
     __ LoadRoot(tmp3, Heap::kHeapNumberMapRootIndex);
-    __ AllocateHeapNumber(dst, tmp1, tmp2, tmp3, &slow, DONT_TAG_RESULT);
+    __ AllocateHeapNumber(dst, tmp1, tmp2, tmp3, &slow);
     __ b(&done);
   }
 
@@ -4520,15 +4520,13 @@ void LCodeGen::DoDeferredNumberTagIU(LInstruction* instr,
     __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
     RecordSafepointWithRegisters(
         instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);
-    __ sub(r0, r0, Operand(kHeapObjectTag));
     __ StoreToSafepointRegisterSlot(r0, dst);
   }
 
   // Done. Put the value in dbl_scratch into the value of the allocated heap
   // number.
   __ bind(&done);
-  __ vstr(dbl_scratch, dst, HeapNumber::kValueOffset);
-  __ add(dst, dst, Operand(kHeapObjectTag));
+  __ vstr(dbl_scratch, FieldMemOperand(dst, HeapNumber::kValueOffset));
 }
 
 
@@ -4553,16 +4551,12 @@ void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
   DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, 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 {
     __ jmp(deferred->entry());
   }
   __ bind(deferred->exit());
-  __ vstr(input_reg, reg, HeapNumber::kValueOffset);
-  // Now that we have finished with the object's real address tag it
-  __ add(reg, reg, Operand(kHeapObjectTag));
+  __ vstr(input_reg, FieldMemOperand(reg, HeapNumber::kValueOffset));
 }
 
 
@@ -4583,7 +4577,6 @@ void LCodeGen::DoDeferredNumberTagD(LNumberTagD* instr) {
   __ CallRuntimeSaveDoubles(Runtime::kAllocateHeapNumber);
   RecordSafepointWithRegisters(
       instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);
-  __ sub(r0, r0, Operand(kHeapObjectTag));
   __ StoreToSafepointRegisterSlot(r0, reg);
 }
 
@@ -5107,7 +5100,7 @@ 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);
   }