From 5846239e1669f8047ad095f18d05e4a04bd61079 Mon Sep 17 00:00:00 2001
From: David Blaikie <dblaikie@gmail.com>
Date: Fri, 8 Mar 2013 21:08:23 +0000
Subject: [PATCH] Assert to bounds check MDNode::getOperand.

The getOperandPtr utility already bounds checks, but allows one-off-the-end.
This assert should catch the cases that could previously have been dereferencing
these one-off-the-end pointer. Happily, no cases of this came up with this
change.

llvm-svn: 176721
---
 llvm/lib/IR/Metadata.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/IR/Metadata.cpp b/llvm/lib/IR/Metadata.cpp
index d751064..0228aeb 100644
--- a/llvm/lib/IR/Metadata.cpp
+++ b/llvm/lib/IR/Metadata.cpp
@@ -303,6 +303,7 @@ void MDNode::deleteTemporary(MDNode *N) {
 
 /// getOperand - Return specified operand.
 Value *MDNode::getOperand(unsigned i) const {
+  assert(i < getNumOperands() && "Invalid operand number");
   return *getOperandPtr(const_cast<MDNode*>(this), i);
 }
 
-- 
2.7.4