Remove all uses of field-tracking flags that do not make decisions but are subject to existing info…

src/a64/stub-cache-a64.cc

Index: src/a64/stub-cache-a64.cc
diff --git a/src/a64/stub-cache-a64.cc b/src/a64/stub-cache-a64.cc
index 55cdf76c2e6c88f6177d402d0c08740db1236b8b..09f6463aa3b20bc16d88f72fe0690bba1def8425 100644
--- a/src/a64/stub-cache-a64.cc
+++ b/src/a64/stub-cache-a64.cc
@@ -273,7 +273,7 @@ void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
                                             bool inobject,
                                             int index,
                                             Representation representation) {
-  ASSERT(!FLAG_track_double_fields || !representation.IsDouble());
+  ASSERT(!representation.IsDouble());
   USE(representation);
   if (inobject) {
     int offset = index * kPointerSize;
@@ -443,11 +443,11 @@ void StoreStubCompiler::GenerateStoreTransition(MacroAssembler* masm,
     __ LoadObject(scratch1, constant);
     __ Cmp(value_reg, scratch1);
     __ B(ne, miss_label);
-  } else if (FLAG_track_fields && representation.IsSmi()) {
+  } else if (representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_label);
-  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+  } else if (representation.IsHeapObject()) {
     __ JumpIfSmi(value_reg, miss_label);
-  } else if (FLAG_track_double_fields && representation.IsDouble()) {
+  } else if (representation.IsDouble()) {
     Label do_store, heap_number;
     __ AllocateHeapNumber(storage_reg, slow, scratch1, scratch2);
 
@@ -520,15 +520,15 @@ void StoreStubCompiler::GenerateStoreTransition(MacroAssembler* masm,
     int offset = object->map()->instance_size() + (index * kPointerSize);
     // TODO(jbramley): This construct appears in several places in this
     // function. Try to clean it up, perhaps using a result_reg.
-    if (FLAG_track_double_fields && representation.IsDouble()) {
+    if (representation.IsDouble()) {
       __ Str(storage_reg, FieldMemOperand(receiver_reg, offset));
     } else {
       __ Str(value_reg, FieldMemOperand(receiver_reg, offset));
     }
 
-    if (!FLAG_track_fields || !representation.IsSmi()) {
+    if (!representation.IsSmi()) {
       // Update the write barrier for the array address.
-      if (!FLAG_track_double_fields || !representation.IsDouble()) {
+      if (!representation.IsDouble()) {
         __ Mov(storage_reg, value_reg);
       }
       __ RecordWriteField(receiver_reg,
@@ -546,15 +546,15 @@ void StoreStubCompiler::GenerateStoreTransition(MacroAssembler* masm,
     // Get the properties array
     __ Ldr(scratch1,
            FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
-    if (FLAG_track_double_fields && representation.IsDouble()) {
+    if (representation.IsDouble()) {
       __ Str(storage_reg, FieldMemOperand(scratch1, offset));
     } else {
       __ Str(value_reg, FieldMemOperand(scratch1, offset));
     }
 
-    if (!FLAG_track_fields || !representation.IsSmi()) {
+    if (!representation.IsSmi()) {
       // Update the write barrier for the array address.
-      if (!FLAG_track_double_fields || !representation.IsDouble()) {
+      if (!representation.IsDouble()) {
         __ Mov(storage_reg, value_reg);
       }
       __ RecordWriteField(scratch1,
@@ -604,11 +604,11 @@ void StoreStubCompiler::GenerateStoreField(MacroAssembler* masm,
 
   Representation representation = lookup->representation();
   ASSERT(!representation.IsNone());
-  if (FLAG_track_fields && representation.IsSmi()) {
+  if (representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_label);
-  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+  } else if (representation.IsHeapObject()) {
     __ JumpIfSmi(value_reg, miss_label);
-  } else if (FLAG_track_double_fields && representation.IsDouble()) {
+  } else if (representation.IsDouble()) {
     // Load the double storage.
     if (index < 0) {
       int offset = (index * kPointerSize) + object->map()->instance_size();
@@ -650,7 +650,7 @@ void StoreStubCompiler::GenerateStoreField(MacroAssembler* masm,
     int offset = object->map()->instance_size() + (index * kPointerSize);
     __ Str(value_reg, FieldMemOperand(receiver_reg, offset));
 
-    if (!FLAG_track_fields || !representation.IsSmi()) {
+    if (!representation.IsSmi()) {
       // Skip updating write barrier if storing a smi.
       __ JumpIfSmi(value_reg, &exit);
 
@@ -674,7 +674,7 @@ void StoreStubCompiler::GenerateStoreField(MacroAssembler* masm,
            FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
     __ Str(value_reg, FieldMemOperand(scratch1, offset));
 
-    if (!FLAG_track_fields || !representation.IsSmi()) {
+    if (!representation.IsSmi()) {
       // Skip updating write barrier if storing a smi.
       __ JumpIfSmi(value_reg, &exit);