From 5b69fe767ca0786ecb50e703f2da8ea09de5da7c Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Tue, 1 Dec 2009 19:20:00 +0000
Subject: Add edge source labels to SelectionDAG graphs, now that the graph
 printing framework omits differentiated edge sources in the case where the
 labels are empty strings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90254 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/SelectionDAGNodes.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'include')

diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 950fd322da..79dbd73e97 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -2397,6 +2397,11 @@ public:
   SDNodeIterator operator++(int) { // Postincrement
     SDNodeIterator tmp = *this; ++*this; return tmp;
   }
+  size_t operator-(SDNodeIterator Other) const {
+    assert(Node == Other.Node &&
+           "Cannot compare iterators of two different nodes!");
+    return Operand - Other.Operand;
+  }
 
   static SDNodeIterator begin(SDNode *N) { return SDNodeIterator(N, 0); }
   static SDNodeIterator end  (SDNode *N) {
-- 
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