add comment to explain my previous commit, as asked by Chris

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62272 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp
index 8139e822ee6ee1dc52c098fe8e6f4b8d19e175f6..bdc50b6c6971c4c5e45b83b725873884b33d82fa 100644 (file)
--- a/lib/VMCore/AsmWriter.cpp
+++ b/lib/VMCore/AsmWriter.cpp
@@ -1671,6 +1671,8 @@ void AssemblyWriter::printInstruction(const Instruction &I) {
     } else {
       for (unsigned i = 1, E = I.getNumOperands(); i != E; ++i) {
         Operand = I.getOperand(i);
+        // note that Operand shouldn't be null, but the test helps make dump()
+        // more tolerant of malformed IR
         if (Operand && Operand->getType() != TheType) {
           PrintAllTypes = true;    // We have differing types!  Print them all!
           break;