From fc4aefb129162a708ebd9a99cc166876613ef8d1 Mon Sep 17 00:00:00 2001
From: Victor Hernandez <vhernandez@apple.com>
Date: Tue, 12 Jan 2010 23:37:59 +0000
Subject: Make WriteConstants() more robust against stray values in
 ValueEnumerator's ValueList

llvm-svn: 93270
---
 llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')

diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index 26c922a7810c..fd1bade8f15d 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -688,6 +688,11 @@ static void WriteConstants(unsigned FirstVal, unsigned LastVal,
       Record.clear();
       continue;
     }
+
+    // Ignore all values in ValueList except for Constants.
+    if (V && (isa<Instruction>(V) || isa<Argument>(V)))
+      continue;
+
     const Constant *C = cast<Constant>(V);
     unsigned Code = -1U;
     unsigned AbbrevToUse = 0;
-- 
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