From 5b9fc44d8128717ef2f219b061c018abb85c717f Mon Sep 17 00:00:00 2001
From: Haojian Wu <hokein.wu@gmail.com>
Date: Fri, 4 Dec 2020 09:02:04 +0100
Subject: [PATCH] [clang] Add a C++17 deduction guide testcase.

From https://bugs.llvm.org/show_bug.cgi?id=47219.

It was crashing before the commit 1e14588d0f68.

Differential Revision: https://reviews.llvm.org/D92573
---
 clang/test/PCH/cxx17-deduction-guide-decl.cpp | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 clang/test/PCH/cxx17-deduction-guide-decl.cpp

diff --git a/clang/test/PCH/cxx17-deduction-guide-decl.cpp b/clang/test/PCH/cxx17-deduction-guide-decl.cpp
new file mode 100644
index 0000000..93ab82c
--- /dev/null
+++ b/clang/test/PCH/cxx17-deduction-guide-decl.cpp
@@ -0,0 +1,24 @@
+// Test with pch.
+// RUN: %clang_cc1 -emit-pch -std=c++17  -o %t %s
+// RUN: %clang_cc1 -include-pch %t -emit-llvm -std=c++17 -o - %s
+
+#ifndef HEADER
+#define HEADER
+
+namespace RP47219 {
+typedef int MyInt;
+template <typename T>
+class Some {
+ public:
+  explicit Some(T, MyInt) {}
+};
+
+struct Foo {};
+void ParseNatural() {
+  Some(Foo(), 1);
+}
+}
+
+#else
+
+#endif
-- 
2.7.4