1 files changed, 15 insertions, 0 deletions
diff --git a/tests/codegen-llvm/cffi/ffi-pure.rs b/tests/codegen-llvm/cffi/ffi-pure.rs
new file mode 100644
index 00000000000..a61e80ecf65
--- /dev/null
+++ b/tests/codegen-llvm/cffi/ffi-pure.rs
@@ -0,0 +1,15 @@
+//@ compile-flags: -C no-prepopulate-passes
+#![crate_type = "lib"]
+#![feature(ffi_pure)]
+
+pub fn bar() {
+    unsafe { foo() }
+}
+
+extern "C" {
+    // CHECK-LABEL: declare{{.*}}void @foo()
+    // CHECK-SAME: [[ATTRS:#[0-9]+]]
+    // CHECK-DAG: attributes [[ATTRS]] = { {{.*}}memory(read){{.*}} }
+    #[unsafe(ffi_pure)]
+    pub fn foo();
+}