2 files changed, 30 insertions, 0 deletions
diff --git a/tests/run-make/sepcomp-separate/Makefile b/tests/run-make/sepcomp-separate/Makefile
new file mode 100644
index 000000000..62cf54a88
--- /dev/null
+++ b/tests/run-make/sepcomp-separate/Makefile
@@ -0,0 +1,9 @@
+include ../tools.mk
+
+# Test that separate compilation actually puts code into separate compilation
+# units.  `foo.rs` defines `magic_fn` in three different modules, which should
+# wind up in three different compilation units.
+
+all:
+	$(RUSTC) foo.rs --emit=llvm-ir -C codegen-units=3
+	[ "$$(cat "$(TMPDIR)"/foo.*.ll | grep -c define\ .*magic_fn)" -eq "3" ]
diff --git a/tests/run-make/sepcomp-separate/foo.rs b/tests/run-make/sepcomp-separate/foo.rs
new file mode 100644
index 000000000..169bafa9b
--- /dev/null
+++ b/tests/run-make/sepcomp-separate/foo.rs
@@ -0,0 +1,21 @@
+fn magic_fn() -> usize {
+    1234
+}
+
+mod a {
+    pub fn magic_fn() -> usize {
+        2345
+    }
+}
+
+mod b {
+    pub fn magic_fn() -> usize {
+        3456
+    }
+}
+
+fn main() {
+    magic_fn();
+    a::magic_fn();
+    b::magic_fn();
+}