Fix these enums' starting values to reflect the way that
instruction opcodes are now numbered. No functionality change.

llvm-svn: 56497
diff --git a/llvm/lib/Target/Alpha/AlphaISelLowering.h b/llvm/lib/Target/Alpha/AlphaISelLowering.h
index 770dde3..6a81962 100644
--- a/llvm/lib/Target/Alpha/AlphaISelLowering.h
+++ b/llvm/lib/Target/Alpha/AlphaISelLowering.h
@@ -25,7 +25,7 @@
   namespace AlphaISD {
     enum NodeType {
       // Start the numbering where the builting ops and target ops leave off.
-      FIRST_NUMBER = ISD::BUILTIN_OP_END+Alpha::INSTRUCTION_LIST_END,
+      FIRST_NUMBER = ISD::BUILTIN_OP_END,
       //These corrospond to the identical Instruction
       CVTQT_, CVTQS_, CVTTQ_,