From d215fd3b74b90f5dc1964610926fcc2a20f959aa Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sat, 6 Jan 2018 21:34:26 +0000
Subject: Vendor import of llvm release_60 branch r321788:
 https://llvm.org/svn/llvm-project/llvm/branches/release_60@321788

---
 unittests/IR/BasicBlockTest.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'unittests/IR/BasicBlockTest.cpp')

diff --git a/unittests/IR/BasicBlockTest.cpp b/unittests/IR/BasicBlockTest.cpp
index f1777e35b82c..08a41ff36938 100644
--- a/unittests/IR/BasicBlockTest.cpp
+++ b/unittests/IR/BasicBlockTest.cpp
@@ -33,6 +33,12 @@ TEST(BasicBlockTest, PhiRange) {
   std::unique_ptr<BasicBlock> BB2(BasicBlock::Create(Context));
   BranchInst::Create(BB.get(), BB2.get());
 
+  // Make sure this doesn't crash if there are no phis.
+  for (auto &PN : BB->phis()) {
+    (void)PN;
+    EXPECT_TRUE(false) << "empty block should have no phis";
+  }
+
   // Make it a cycle.
   auto *BI = BranchInst::Create(BB.get(), BB.get());
 
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