--- a/graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiValueUtil.java	Mon Jan 09 22:01:39 2012 +0100
+++ b/graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiValueUtil.java	Tue Jan 10 08:50:07 2012 -0800
@@ -98,4 +98,27 @@
         assert value.kind == CiKind.Double;
         return asRegister(value);
     }
+
+
+    public static boolean sameRegister(CiValue...values) {
+        for (int i = 0; i < values.length; i++) {
+            for (int j = i + 1; j < values.length; j++) {
+                if (isRegister(values[i]) && isRegister(values[j]) && asRegister(values[i]) != asRegister(values[j])) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+    public static boolean differentRegisters(CiValue...values) {
+        for (int i = 0; i < values.length; i++) {
+            for (int j = i + 1; j < values.length; j++) {
+                if (isRegister(values[i]) && isRegister(values[j]) && asRegister(values[i]) == asRegister(values[j])) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
 }