--- a/graal/GraalCompiler/src/com/sun/c1x/graph/GraphBuilder.java	Tue Jun 07 17:05:13 2011 +0200
+++ b/graal/GraalCompiler/src/com/sun/c1x/graph/GraphBuilder.java	Tue Jun 07 19:06:20 2011 +0200
@@ -554,7 +554,18 @@
     private void genShiftOp(CiKind kind, int opcode) {
         Value s = frameState.ipop();
         Value x = frameState.pop(kind);
-        frameState.push(kind, append(new Shift(opcode, x, s, graph)));
+        Shift v;
+        switch(opcode){
+            case ISHL:
+            case LSHL: v = new LeftShift(kind, x, s, graph); break;
+            case ISHR:
+            case LSHR: v = new RightShift(kind, x, s, graph); break;
+            case IUSHR:
+            case LUSHR: v = new UnsignedRightShift(kind, x, s, graph); break;
+            default:
+                throw new CiBailout("should not reach");
+        }
+        frameState.push(kind, append(v));
     }
 
     private void genLogicOp(CiKind kind, int opcode) {