From: Daniel Berlin <dberlin@dberlin.org>
Date: Fri, 19 May 2017 19:01:21 +0000 (+0000)
Subject: BasicAA: Uninserted instructions have no parent, and notDifferentParent explicitly... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a55349e67c8beaf6f13366502fb1e351d748a7ca;p=llvm

BasicAA: Uninserted instructions have no parent, and notDifferentParent explicitly allows for this case, but getParent crashes when handed one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@303442 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp
index a33c01a0e46..f743cb234c4 100644
--- a/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/lib/Analysis/BasicAliasAnalysis.cpp
@@ -683,8 +683,11 @@ static bool isIntrinsicCall(ImmutableCallSite CS, Intrinsic::ID IID) {
 
 #ifndef NDEBUG
 static const Function *getParent(const Value *V) {
-  if (const Instruction *inst = dyn_cast<Instruction>(V))
+  if (const Instruction *inst = dyn_cast<Instruction>(V)) {
+    if (!inst->getParent())
+      return nullptr;
     return inst->getParent()->getParent();
+  }
 
   if (const Argument *arg = dyn_cast<Argument>(V))
     return arg->getParent();