Add a new ANY_EXTEND node, which operates like an extension but has undefined

top bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23200 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/SelectionDAGNodes.h

@@ -158,6 +158,9 @@ namespace ISD {
     // ZERO_EXTEND - Used for integer types, zeroing the new bits.
     ZERO_EXTEND,
 
+    // ANY_EXTEND - Used for integer types.  The high bits are undefined.
+    ANY_EXTEND,
+    
     // TRUNCATE - Completely drop the high bits.
     TRUNCATE,