Add new optional getPassName() virtual function that a Pass can override
to make debugging output a lot nicer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2395 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/IPO/ConstantMerge.cpp b/lib/Transforms/IPO/ConstantMerge.cpp
index a635b8d..146911e 100644
--- a/lib/Transforms/IPO/ConstantMerge.cpp
+++ b/lib/Transforms/IPO/ConstantMerge.cpp
@@ -65,6 +65,8 @@
     unsigned LastConstantSeen;
   public:
     inline ConstantMerge() : LastConstantSeen(0) {}
+
+    const char *getPassName() const {return "Merge Duplicate Global Constants";}
     
     // doInitialization - For this pass, process all of the globals in the
     // module, eliminating duplicate constants.
@@ -89,6 +91,8 @@
   };
   
   struct DynamicConstantMerge : public ConstantMerge {
+    const char *getPassName() const { return "Dynamic Constant Merge"; }
+
     // runOnFunction - Check to see if any globals have been added to the 
     // global list for the module.  If so, eliminate them.
     //