From c8d7b85ba133f6e590d1c3ac78d47c88914aedea Mon Sep 17 00:00:00 2001
From: Victor Hernandez <vhernandez@apple.com>
Date: Sat, 6 Feb 2010 01:31:55 +0000
Subject: Linker should not remap null operands of metadata

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95468 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Linker/LinkModules.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'lib/Linker/LinkModules.cpp')

diff --git a/lib/Linker/LinkModules.cpp b/lib/Linker/LinkModules.cpp
index 279c4be..7f441b0 100644
--- a/lib/Linker/LinkModules.cpp
+++ b/lib/Linker/LinkModules.cpp
@@ -395,8 +395,12 @@ static Value *RemapOperand(const Value *In,
   } else if (const MDNode *MD = dyn_cast<MDNode>(In)) {
     if (MD->isFunctionLocal()) {
       SmallVector<Value*, 4> Elts;
-      for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i)
-        Elts.push_back(RemapOperand(MD->getOperand(i), ValueMap));
+      for (unsigned i = 0, e = MD->getNumOperands(); i != e; ++i) {
+        if (MD->getOperand(i))
+          Elts.push_back(RemapOperand(MD->getOperand(i), ValueMap));
+        else
+          Elts.push_back(NULL);
+      }
       Result = MDNode::get(In->getContext(), Elts.data(), MD->getNumOperands());
     } else {
       Result = const_cast<Value*>(In);
-- 
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