From 03c3511211623f7750f11eeba62f906ab7a41c39 Mon Sep 17 00:00:00 2001
From: Teresa Johnson <tejohnson@google.com>
Date: Sat, 10 Sep 2016 06:15:26 +0000
Subject: [PATCH] [LTO] Handle null GV in Symbol object

Similar to other Symbol methods, have Symbol::getComdat handle
a null GV gracefully.

Fixes PR30326.

llvm-svn: 281134
---
 llvm/include/llvm/LTO/LTO.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/include/llvm/LTO/LTO.h b/llvm/include/llvm/LTO/LTO.h
index d5f3b12cc8e7..5b684bd1c904 100644
--- a/llvm/include/llvm/LTO/LTO.h
+++ b/llvm/include/llvm/LTO/LTO.h
@@ -165,6 +165,8 @@ public:
       return GV && llvm::canBeOmittedFromSymbolTable(GV);
     }
     Expected<const Comdat *> getComdat() const {
+      if (!GV)
+        return nullptr;
       const GlobalObject *GO;
       if (auto *GA = dyn_cast<GlobalAlias>(GV)) {
         GO = GA->getBaseObject();