Add 'compiler/rustc_codegen_gcc/' from commit 'afae271d5d'

git-subtree-dir: compiler/rustc_codegen_gcc
git-subtree-mainline: ae90dcf020
git-subtree-split: afae271d5d

compiler/rustc_codegen_gcc/tests/run/array.rs

@@ -0,0 +1,229 @@
+// Compiler:
+//
+// Run-time:
+//   status: 0
+//   stdout: 42
+//     7
+//     5
+//     10
+
+#![feature(arbitrary_self_types, auto_traits, lang_items, no_core, start, intrinsics)]
+
+#![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 usize {}
+impl Copy for i32 {}
+impl Copy for u8 {}
+impl Copy for i8 {}
+impl Copy for i16 {}
+
+#[lang = "receiver"]
+trait Receiver {
+}
+
+#[lang = "freeze"]
+pub(crate) unsafe auto trait Freeze {}
+
+mod libc {
+    #[link(name = "c")]
+    extern "C" {
+        pub fn printf(format: *const i8, ...) -> i32;
+        pub fn puts(s: *const u8) -> i32;
+    }
+}
+
+#[lang = "index"]
+pub trait Index<Idx: ?Sized> {
+    type Output: ?Sized;
+    fn index(&self, index: Idx) -> &Self::Output;
+}
+
+impl<T> Index<usize> for [T; 3] {
+    type Output = T;
+
+    fn index(&self, index: usize) -> &Self::Output {
+        &self[index]
+    }
+}
+
+impl<T> Index<usize> for [T] {
+    type Output = T;
+
+    fn index(&self, index: usize) -> &Self::Output {
+        &self[index]
+    }
+}
+
+#[lang = "drop_in_place"]
+#[allow(unconditional_recursion)]
+pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
+    // Code here does not matter - this is replaced by the
+    // real drop glue by the compiler.
+    drop_in_place(to_drop);
+}
+
+#[lang = "panic"]
+#[track_caller]
+#[no_mangle]
+pub fn panic(_msg: &str) -> ! {
+    unsafe {
+        libc::puts("Panicking\0" as *const str as *const u8);
+        intrinsics::abort();
+    }
+}
+
+#[lang = "panic_location"]
+struct PanicLocation {
+    file: &'static str,
+    line: u32,
+    column: u32,
+}
+
+#[lang = "panic_bounds_check"]
+#[track_caller]
+#[no_mangle]
+fn panic_bounds_check(index: usize, len: usize) -> ! {
+    unsafe {
+        libc::printf("index out of bounds: the len is %d but the index is %d\n\0" as *const str as *const i8, len, index);
+        intrinsics::abort();
+    }
+}
+
+mod intrinsics {
+    extern "rust-intrinsic" {
+        pub fn 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
+    }
+}
+
+#[lang = "sub"]
+pub trait Sub<RHS = Self> {
+    type Output;
+
+    fn sub(self, rhs: RHS) -> Self::Output;
+}
+
+impl Sub for usize {
+    type Output = Self;
+
+    fn sub(self, rhs: Self) -> Self {
+        self - rhs
+    }
+}
+
+impl Sub for isize {
+    type Output = Self;
+
+    fn sub(self, rhs: Self) -> Self {
+        self - rhs
+    }
+}
+
+impl Sub for u8 {
+    type Output = Self;
+
+    fn sub(self, rhs: Self) -> Self {
+        self - rhs
+    }
+}
+
+impl Sub for i8 {
+    type Output = Self;
+
+    fn sub(self, rhs: Self) -> Self {
+        self - rhs
+    }
+}
+
+impl Sub for i16 {
+    type Output = Self;
+
+    fn sub(self, rhs: Self) -> Self {
+        self - rhs
+    }
+}
+
+
+/*
+ * Code
+ */
+
+static mut ONE: usize = 1;
+
+fn make_array() -> [u8; 3] {
+    [42, 10, 5]
+}
+
+#[start]
+fn main(argc: isize, _argv: *const *const u8) -> isize {
+    let array = [42, 7, 5];
+    let array2 = make_array();
+    unsafe {
+        libc::printf(b"%ld\n\0" as *const u8 as *const i8, array[ONE - 1]);
+        libc::printf(b"%ld\n\0" as *const u8 as *const i8, array[ONE]);
+        libc::printf(b"%ld\n\0" as *const u8 as *const i8, array[ONE + 1]);
+
+        libc::printf(b"%d\n\0" as *const u8 as *const i8, array2[argc as usize] as u32);
+    }
+    0
+}