From 3c338f3a7e224f6da82e3adc1bbff9c0265d59e0 Mon Sep 17 00:00:00 2001
From: David Blaikie <dblaikie@gmail.com>
Date: Sat, 22 Aug 2015 22:36:40 +0000
Subject: Verifier: Don't crash on null entries in debug info retained types
 list

There was already a good error path for this. Added a test for it & made
a minor code change to ensure the error path was actually reached,
rather than crashing before we got that far.

llvm-svn: 245795
---
 llvm/lib/IR/Verifier.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'llvm/lib/IR/Verifier.cpp')

diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index af1121e3c73..813d06cf643 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -3782,7 +3782,7 @@ void Verifier::verifyTypeRefs() {
   for (auto *CU : CUs->operands())
     if (auto Ts = cast<DICompileUnit>(CU)->getRetainedTypes())
       for (DIType *Op : Ts)
-        if (auto *T = dyn_cast<DICompositeType>(Op))
+        if (auto *T = dyn_cast_or_null<DICompositeType>(Op))
           if (auto *S = T->getRawIdentifier()) {
             UnresolvedTypeRefs.erase(S);
             TypeRefs.insert(std::make_pair(S, T));
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