Changes in code.

Author: bcheng0127

visa/GraphColor.cpp

@@ -7755,13 +7755,8 @@ bool GraphColor::regAlloc(bool doBankConflictReduction,
       assignColors(FIRST_FIT);
     }
   } else {
-    // assign registers for ARFs using a round-robin heuristic
-    // For address register, there is no fragment issue
-    if (builder.needA0WAR()) {
-      assignColors(ROUND_ROBIN, false, false);
-    } else {
-      assignColors(FIRST_FIT, false, false);
-    }
+    // assign registers for ARFs using a first-fit heuristic
+    assignColors(FIRST_FIT, false, false);
   }
 
   return (requireSpillCode() == false);