Chapter 20: Graph Coloring Register Allocationlinear-chapter20

1 files changed, 4 insertions, 4 deletions

diff --git a/src/main/java/com/seaofnodes/simple/node/LoadNode.java b/src/main/java/com/seaofnodes/simple/node/LoadNode.java
index 4004f87f..6c74042b 100644
--- a/src/main/java/com/seaofnodes/simple/node/LoadNode.java
+++ b/src/main/java/com/seaofnodes/simple/node/LoadNode.java
@@ -201,10 +201,10 @@ public class LoadNode extends MemOpNode {
             return new AndNode(null,val,con(ti._max));
         // Signed extension
         int shift = Long.numberOfLeadingZeros(ti._max)-1;
-        if( shift==0 )
-            return val;
         Node shf = con(shift);
-        Node shl = new ShlNode(null,val,shf.keep()).peephole();
-        return new SarNode(null,shl,shf.unkeep());
+        if( shf._type==TypeInteger.ZERO )
+            return val;
+        //return peep(new SarNode(null,peep(new ShlNode(null,val,shf.keep())),shf.unkeep()));
+        throw Utils.TODO();
     }
 }