Make pred_iterator DefaultConstructible, and add an accessor to

retrieve the underlying getOperandNo() value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126804 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/include/llvm/Support/CFG.h b/include/llvm/Support/CFG.h
index 9ba71fc..d2ea123 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;