Make WriteConstants() more robust against stray values in ValueEnumerator's ValueList

llvm-svn: 93270
2010-01-12 23:37:59 +00:00
parent 58a6a8ec62
commit fc4aefb129
1 changed files with 5 additions and 0 deletions
--- 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;