1 files changed, 69 insertions, 0 deletions
diff --git a/tests/codegen-llvm/function-arguments-noopt.rs b/tests/codegen-llvm/function-arguments-noopt.rs
new file mode 100644
index 00000000000..c80f119696d
--- /dev/null
+++ b/tests/codegen-llvm/function-arguments-noopt.rs
@@ -0,0 +1,69 @@
+//@ compile-flags: -C opt-level=0 -C no-prepopulate-passes
+
+// This test checks that arguments/returns in opt-level=0 builds,
+// while lacking attributes used for optimization, still have ABI-affecting attributes.
+
+#![crate_type = "lib"]
+#![feature(rustc_attrs)]
+
+pub struct S {
+    _field: [i32; 8],
+}
+
+// CHECK: zeroext i1 @boolean(i1 zeroext %x)
+#[no_mangle]
+pub fn boolean(x: bool) -> bool {
+    x
+}
+
+// CHECK-LABEL: @boolean_call
+#[no_mangle]
+pub fn boolean_call(x: bool, f: fn(bool) -> bool) -> bool {
+    // CHECK: call zeroext i1 %f(i1 zeroext %x)
+    f(x)
+}
+
+// CHECK: align 4 ptr @borrow(ptr align 4 %x)
+#[no_mangle]
+pub fn borrow(x: &i32) -> &i32 {
+    x
+}
+
+// CHECK: align 4 ptr @borrow_mut(ptr align 4 %x)
+#[no_mangle]
+pub fn borrow_mut(x: &mut i32) -> &mut i32 {
+    x
+}
+
+// CHECK-LABEL: @borrow_call
+#[no_mangle]
+pub fn borrow_call(x: &i32, f: fn(&i32) -> &i32) -> &i32 {
+    // CHECK: call align 4 ptr %f(ptr align 4 %x)
+    f(x)
+}
+
+// CHECK: void @struct_(ptr sret([32 x i8]) align 4{{( %_0)?}}, ptr align 4 %x)
+#[no_mangle]
+pub fn struct_(x: S) -> S {
+    x
+}
+
+// CHECK-LABEL: @struct_call
+#[no_mangle]
+pub fn struct_call(x: S, f: fn(S) -> S) -> S {
+    // CHECK: call void %f(ptr sret([32 x i8]) align 4{{( %_0)?}}, ptr align 4 %{{.+}})
+    f(x)
+}
+
+// CHECK: { i1, i8 } @enum_(i1 zeroext %x.0, i8 %x.1)
+#[no_mangle]
+pub fn enum_(x: Option<u8>) -> Option<u8> {
+    x
+}
+
+// CHECK-LABEL: @enum_call
+#[no_mangle]
+pub fn enum_call(x: Option<u8>, f: fn(Option<u8>) -> Option<u8>) -> Option<u8> {
+    // CHECK: call { i1, i8 } %f(i1 zeroext %x.0, i8 %x.1)
+    f(x)
+}