From 3742f4d9f6eaf7b4b7a8aa246ee3dc2fdb2b80c3 Mon Sep 17 00:00:00 2001
From: Michael Woerister <michaelwoerister@posteo>
Date: Fri, 3 Aug 2018 17:09:50 +0200
Subject: [PATCH] Add test case for including upstream object files in
 staticlibs when doing cross-lang LTO.

---
 .../cross-lang-lto-upstream-rlibs/Makefile    | 23 +++++++++++++++++++
 .../staticlib.rs                              | 18 +++++++++++++++
 .../cross-lang-lto-upstream-rlibs/upstream.rs | 13 +++++++++++
 3 files changed, 54 insertions(+)
 create mode 100644 src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/Makefile
 create mode 100644 src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/staticlib.rs
 create mode 100644 src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/upstream.rs

diff --git a/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/Makefile b/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/Makefile
new file mode 100644
index 000000000000..de42c6e0eb54
--- /dev/null
+++ b/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/Makefile
@@ -0,0 +1,23 @@
+
+-include ../tools.mk
+
+# This test makes sure that we don't loose upstream object files when compiling
+# staticlibs with -Zcross-lang-lto
+
+all: staticlib.rs upstream.rs
+	$(RUSTC) upstream.rs -Z cross-lang-lto -Ccodegen-units=1
+
+	# Check No LTO
+	$(RUSTC) staticlib.rs -Z cross-lang-lto -Ccodegen-units=1 -L. -o $(TMPDIR)/staticlib.a
+	(cd $(TMPDIR); llvm-ar x ./staticlib.a)
+	# Make sure the upstream object file was included
+	ls upstream.*.rcgu.o
+
+	# Cleanup
+	rm $(TMPDIR)/*
+
+	# Check ThinLTO
+	$(RUSTC) upstream.rs -Z cross-lang-lto -Ccodegen-units=1 -Clto=thin
+	$(RUSTC) staticlib.rs -Z cross-lang-lto -Ccodegen-units=1 -Clto=thin -L. -o $(TMPDIR)/staticlib.a
+	(cd $(TMPDIR); llvm-ar x ./staticlib.a)
+	ls upstream.*.rcgu.o
diff --git a/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/staticlib.rs b/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/staticlib.rs
new file mode 100644
index 000000000000..b370b7b859d8
--- /dev/null
+++ b/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/staticlib.rs
@@ -0,0 +1,18 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![crate_type="staticlib"]
+
+extern crate upstream;
+
+#[no_mangle]
+pub extern fn bar() {
+    upstream::foo();
+}
diff --git a/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/upstream.rs b/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/upstream.rs
new file mode 100644
index 000000000000..a79b9bf08fc6
--- /dev/null
+++ b/src/test/run-make-fulldeps/cross-lang-lto-upstream-rlibs/upstream.rs
@@ -0,0 +1,13 @@
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![crate_type = "rlib"]
+
+pub fn foo() {}