From b62daa9ec3b6da6e7251d99ddb737759323aec7b Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Wed, 2 Mar 2011 00:11:28 +0000
Subject: [PATCH] Make pred_iterator DefaultConstructible, and add an accessor
 to retrieve the underlying getOperandNo() value.

llvm-svn: 126804
---
 include/llvm/Support/CFG.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/llvm/Support/CFG.h b/include/llvm/Support/CFG.h
index 9ba71fcca8a..d2ea12364e9 100644
--- a/include/llvm/Support/CFG.h
+++ b/include/llvm/Support/CFG.h
@@ -41,6 +41,7 @@ class PredIterator : public std::iterator<std::forward_iterator_tag,
 public:
   typedef typename super::pointer pointer;
 
+  PredIterator() {}
   explicit inline PredIterator(Ptr *bb) : It(bb->use_begin()) {
     advancePastNonTerminators();
   }
@@ -64,6 +65,12 @@ public:
   inline Self operator++(int) { // Postincrement
     Self tmp = *this; ++*this; return tmp;
   }
+
+  /// getOperandNo - Return the operand number in the predecessor's
+  /// terminator of the successor.
+  unsigned getOperandNo() const {
+    return It.getOperandNo();
+  }
 };
 
 typedef PredIterator<BasicBlock, Value::use_iterator> pred_iterator;