From 13ad07aca317dfb5c261bb67d3be36111857df42 Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Thu, 28 Aug 2014 20:14:15 +0000
Subject: [PATCH] [modules] PR20786: add (already passing) regression test from
 the bug report.

llvm-svn: 216683
---
 clang/test/Modules/Inputs/PR20786/TBranchProxy.h   |  2 ++
 clang/test/Modules/Inputs/PR20786/TFormula.h       |  1 +
 clang/test/Modules/Inputs/PR20786/TMath.h          |  1 +
 clang/test/Modules/Inputs/PR20786/module.modulemap |  3 +++
 clang/test/Modules/Inputs/PR20786/random.h         | 12 ++++++++++++
 clang/test/Modules/pr20786.cpp                     |  2 ++
 6 files changed, 21 insertions(+)
 create mode 100644 clang/test/Modules/Inputs/PR20786/TBranchProxy.h
 create mode 100644 clang/test/Modules/Inputs/PR20786/TFormula.h
 create mode 100644 clang/test/Modules/Inputs/PR20786/TMath.h
 create mode 100644 clang/test/Modules/Inputs/PR20786/module.modulemap
 create mode 100644 clang/test/Modules/Inputs/PR20786/random.h
 create mode 100644 clang/test/Modules/pr20786.cpp

diff --git a/clang/test/Modules/Inputs/PR20786/TBranchProxy.h b/clang/test/Modules/Inputs/PR20786/TBranchProxy.h
new file mode 100644
index 000000000000..91f3730c3b88
--- /dev/null
+++ b/clang/test/Modules/Inputs/PR20786/TBranchProxy.h
@@ -0,0 +1,2 @@
+#include "random.h"
+#include "TFormula.h"
diff --git a/clang/test/Modules/Inputs/PR20786/TFormula.h b/clang/test/Modules/Inputs/PR20786/TFormula.h
new file mode 100644
index 000000000000..316e3ad7222b
--- /dev/null
+++ b/clang/test/Modules/Inputs/PR20786/TFormula.h
@@ -0,0 +1 @@
+#include "TMath.h"
diff --git a/clang/test/Modules/Inputs/PR20786/TMath.h b/clang/test/Modules/Inputs/PR20786/TMath.h
new file mode 100644
index 000000000000..b7dba620f7d1
--- /dev/null
+++ b/clang/test/Modules/Inputs/PR20786/TMath.h
@@ -0,0 +1 @@
+#include "random.h"
diff --git a/clang/test/Modules/Inputs/PR20786/module.modulemap b/clang/test/Modules/Inputs/PR20786/module.modulemap
new file mode 100644
index 000000000000..daf78cd0cd3f
--- /dev/null
+++ b/clang/test/Modules/Inputs/PR20786/module.modulemap
@@ -0,0 +1,3 @@
+module TMath { header "TMath.h" }
+module TFormula { header "TFormula.h" }
+module TBranchProxy { header "TBranchProxy.h" }
diff --git a/clang/test/Modules/Inputs/PR20786/random.h b/clang/test/Modules/Inputs/PR20786/random.h
new file mode 100644
index 000000000000..86a7d83c19c0
--- /dev/null
+++ b/clang/test/Modules/Inputs/PR20786/random.h
@@ -0,0 +1,12 @@
+namespace std {
+  template<typename> struct mersenne_twister_engine {
+    friend bool operator==(const mersenne_twister_engine &,
+                           const mersenne_twister_engine &) {
+      return false;
+    }
+  };
+  struct random_device {
+    mersenne_twister_engine<int> mt; // require complete type
+  };
+}
+
diff --git a/clang/test/Modules/pr20786.cpp b/clang/test/Modules/pr20786.cpp
new file mode 100644
index 000000000000..35d62df91cc9
--- /dev/null
+++ b/clang/test/Modules/pr20786.cpp
@@ -0,0 +1,2 @@
+// RUN: rm -rf %T
+// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%T -fmodule-name=TBranchProxy -emit-module -x c++ %S/Inputs/PR20786/module.modulemap