1 files changed, 165 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_gcc/tests/run/mut_ref.rs b/compiler/rustc_codegen_gcc/tests/run/mut_ref.rs
new file mode 100644
index 000000000..52de20021
--- /dev/null
+++ b/compiler/rustc_codegen_gcc/tests/run/mut_ref.rs
@@ -0,0 +1,165 @@
+
+// Compiler:
+//
+// Run-time:
+//   stdout: 2
+//     7
+//     6
+//     11
+
+#![allow(unused_attributes)]
+#![feature(auto_traits, lang_items, no_core, start, intrinsics, track_caller)]
+
+#![no_std]
+#![no_core]
+
+/*
+ * Core
+ */
+
+// Because we don't have core yet.
+#[lang = "sized"]
+pub trait Sized {}
+
+#[lang = "copy"]
+trait Copy {
+}
+
+impl Copy for isize {}
+impl Copy for *mut i32 {}
+impl Copy for usize {}
+impl Copy for u8 {}
+impl Copy for i8 {}
+impl Copy for i32 {}
+
+#[lang = "receiver"]
+trait Receiver {
+}
+
+#[lang = "freeze"]
+pub(crate) unsafe auto trait Freeze {}
+
+#[lang = "panic_location"]
+struct PanicLocation {
+    file: &'static str,
+    line: u32,
+    column: u32,
+}
+
+mod libc {
+    #[link(name = "c")]
+    extern "C" {
+        pub fn puts(s: *const u8) -> i32;
+        pub fn fflush(stream: *mut i32) -> i32;
+        pub fn printf(format: *const i8, ...) -> i32;
+
+        pub static stdout: *mut i32;
+    }
+}
+
+mod intrinsics {
+    extern "rust-intrinsic" {
+        pub fn abort() -> !;
+    }
+}
+
+#[lang = "panic"]
+#[track_caller]
+#[no_mangle]
+pub fn panic(_msg: &str) -> ! {
+    unsafe {
+        libc::puts("Panicking\0" as *const str as *const u8);
+        libc::fflush(libc::stdout);
+        intrinsics::abort();
+    }
+}
+
+#[lang = "add"]
+trait Add<RHS = Self> {
+    type Output;
+
+    fn add(self, rhs: RHS) -> Self::Output;
+}
+
+impl Add for u8 {
+    type Output = Self;
+
+    fn add(self, rhs: Self) -> Self {
+        self + rhs
+    }
+}
+
+impl Add for i8 {
+    type Output = Self;
+
+    fn add(self, rhs: Self) -> Self {
+        self + rhs
+    }
+}
+
+impl Add for i32 {
+    type Output = Self;
+
+    fn add(self, rhs: Self) -> Self {
+        self + rhs
+    }
+}
+
+impl Add for usize {
+    type Output = Self;
+
+    fn add(self, rhs: Self) -> Self {
+        self + rhs
+    }
+}
+
+impl Add for isize {
+    type Output = Self;
+
+    fn add(self, rhs: Self) -> Self {
+        self + rhs
+    }
+}
+
+/*
+ * Code
+ */
+
+struct Test {
+    field: isize,
+}
+
+fn test(num: isize) -> Test {
+    Test {
+        field: num + 1,
+    }
+}
+
+fn update_num(num: &mut isize) {
+    *num = *num + 5;
+}
+
+#[start]
+fn main(mut argc: isize, _argv: *const *const u8) -> isize {
+    let mut test = test(argc);
+    unsafe {
+        libc::printf(b"%ld\n\0" as *const u8 as *const i8, test.field);
+    }
+    update_num(&mut test.field);
+    unsafe {
+        libc::printf(b"%ld\n\0" as *const u8 as *const i8, test.field);
+    }
+
+    update_num(&mut argc);
+    unsafe {
+        libc::printf(b"%ld\n\0" as *const u8 as *const i8, argc);
+    }
+
+    let refe = &mut argc;
+    *refe = *refe + 5;
+    unsafe {
+        libc::printf(b"%ld\n\0" as *const u8 as *const i8, argc);
+    }
+
+    0
+}