A64: Minor cleaning in StoreStubCompiler::GenerateStoreField.

src/a64/stub-cache-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 443 matching lines @@
       transition->LastAdded());
 
   // Adjust for the number of properties stored in the object. Even in the
   // face of a transition we can use the old map here because the size of the
   // object and the number of in-object properties is not going to change.
   index -= object->map()->inobject_properties();
 
   // TODO(verwaest): Share this code as a code stub.
   SmiCheck smi_check = representation.IsTagged()
       ? INLINE_SMI_CHECK : OMIT_SMI_CHECK;
+  Register prop_reg =
+    (FLAG_track_double_fields && representation.IsDouble()) ? storage_reg

[ulan, 2014/03/20 10:39:37]

why FLAG_track_double_fields?

+                                                            : value_reg;
   if (index < 0) {
     // Set the property straight into the object.
     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 (representation.IsDouble()) {
-      __ Str(storage_reg, FieldMemOperand(receiver_reg, offset));
-    } else {
-      __ Str(value_reg, FieldMemOperand(receiver_reg, offset));
-    }
+    __ Str(prop_reg, FieldMemOperand(receiver_reg, offset));
 
     if (!representation.IsSmi()) {
       // Update the write barrier for the array address.
       if (!representation.IsDouble()) {
         __ Mov(storage_reg, value_reg);
       }
       __ RecordWriteField(receiver_reg,
                           offset,
                           storage_reg,
                           scratch1,
                           kLRHasNotBeenSaved,
                           kDontSaveFPRegs,
                           EMIT_REMEMBERED_SET,
                           smi_check);
     }
   } else {
     // Write to the properties array.
     int offset = index * kPointerSize + FixedArray::kHeaderSize;
     // Get the properties array
     __ Ldr(scratch1,
            FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
-    if (representation.IsDouble()) {
-      __ Str(storage_reg, FieldMemOperand(scratch1, offset));
-    } else {
-      __ Str(value_reg, FieldMemOperand(scratch1, offset));
-    }
+    __ Str(prop_reg, FieldMemOperand(scratch1, offset));
 
     if (!representation.IsSmi()) {
       // Update the write barrier for the array address.
       if (!representation.IsDouble()) {
         __ Mov(storage_reg, value_reg);
       }
       __ RecordWriteField(scratch1,
                           offset,
                           storage_reg,
                           receiver_reg,
@@ skipping 989 matching lines @@
 
   // Miss case, call the runtime.
   __ Bind(&miss);
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64