1 files changed, 657 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_cranelift/example/mini_core.rs b/compiler/rustc_codegen_cranelift/example/mini_core.rs
new file mode 100644
index 000000000..8b6042a3d
--- /dev/null
+++ b/compiler/rustc_codegen_cranelift/example/mini_core.rs
@@ -0,0 +1,657 @@
+#![feature(
+    no_core,
+    lang_items,
+    intrinsics,
+    unboxed_closures,
+    extern_types,
+    decl_macro,
+    rustc_attrs,
+    transparent_unions,
+    auto_traits,
+    thread_local
+)]
+#![no_core]
+#![allow(dead_code)]
+
+#[lang = "sized"]
+pub trait Sized {}
+
+#[lang = "destruct"]
+pub trait Destruct {}
+
+#[lang = "unsize"]
+pub trait Unsize<T: ?Sized> {}
+
+#[lang = "coerce_unsized"]
+pub trait CoerceUnsized<T> {}
+
+impl<'a, 'b: 'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a U> for &'b T {}
+impl<'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a mut U> for &'a mut T {}
+impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*const U> for *const T {}
+impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<*mut U> for *mut T {}
+
+#[lang = "dispatch_from_dyn"]
+pub trait DispatchFromDyn<T> {}
+
+// &T -> &U
+impl<'a, T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<&'a U> for &'a T {}
+// &mut T -> &mut U
+impl<'a, T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<&'a mut U> for &'a mut T {}
+// *const T -> *const U
+impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*const U> for *const T {}
+// *mut T -> *mut U
+impl<T: ?Sized+Unsize<U>, U: ?Sized> DispatchFromDyn<*mut U> for *mut T {}
+impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Box<U>> for Box<T> {}
+
+#[lang = "receiver"]
+pub trait Receiver {}
+
+impl<T: ?Sized> Receiver for &T {}
+impl<T: ?Sized> Receiver for &mut T {}
+impl<T: ?Sized> Receiver for Box<T> {}
+
+#[lang = "copy"]
+pub unsafe trait Copy {}
+
+unsafe impl Copy for bool {}
+unsafe impl Copy for u8 {}
+unsafe impl Copy for u16 {}
+unsafe impl Copy for u32 {}
+unsafe impl Copy for u64 {}
+unsafe impl Copy for u128 {}
+unsafe impl Copy for usize {}
+unsafe impl Copy for i8 {}
+unsafe impl Copy for i16 {}
+unsafe impl Copy for i32 {}
+unsafe impl Copy for isize {}
+unsafe impl Copy for f32 {}
+unsafe impl Copy for f64 {}
+unsafe impl Copy for char {}
+unsafe impl<'a, T: ?Sized> Copy for &'a T {}
+unsafe impl<T: ?Sized> Copy for *const T {}
+unsafe impl<T: ?Sized> Copy for *mut T {}
+unsafe impl<T: Copy> Copy for Option<T> {}
+
+#[lang = "sync"]
+pub unsafe trait Sync {}
+
+unsafe impl Sync for bool {}
+unsafe impl Sync for u8 {}
+unsafe impl Sync for u16 {}
+unsafe impl Sync for u32 {}
+unsafe impl Sync for u64 {}
+unsafe impl Sync for usize {}
+unsafe impl Sync for i8 {}
+unsafe impl Sync for i16 {}
+unsafe impl Sync for i32 {}
+unsafe impl Sync for isize {}
+unsafe impl Sync for char {}
+unsafe impl<'a, T: ?Sized> Sync for &'a T {}
+unsafe impl Sync for [u8; 16] {}
+
+#[lang = "freeze"]
+unsafe auto trait Freeze {}
+
+unsafe impl<T: ?Sized> Freeze for PhantomData<T> {}
+unsafe impl<T: ?Sized> Freeze for *const T {}
+unsafe impl<T: ?Sized> Freeze for *mut T {}
+unsafe impl<T: ?Sized> Freeze for &T {}
+unsafe impl<T: ?Sized> Freeze for &mut T {}
+
+#[lang = "structural_peq"]
+pub trait StructuralPartialEq {}
+
+#[lang = "structural_teq"]
+pub trait StructuralEq {}
+
+#[lang = "not"]
+pub trait Not {
+    type Output;
+
+    fn not(self) -> Self::Output;
+}
+
+impl Not for bool {
+    type Output = bool;
+
+    fn not(self) -> bool {
+        !self
+    }
+}
+
+#[lang = "mul"]
+pub trait Mul<RHS = Self> {
+    type Output;
+
+    #[must_use]
+    fn mul(self, rhs: RHS) -> Self::Output;
+}
+
+impl Mul for u8 {
+    type Output = Self;
+
+    fn mul(self, rhs: Self) -> Self::Output {
+        self * rhs
+    }
+}
+
+impl Mul for usize {
+    type Output = Self;
+
+    fn mul(self, rhs: Self) -> Self::Output {
+        self * rhs
+    }
+}
+
+#[lang = "add"]
+pub 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 usize {
+    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 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
+    }
+}
+
+#[lang = "rem"]
+pub trait Rem<RHS = Self> {
+    type Output;
+
+    fn rem(self, rhs: RHS) -> Self::Output;
+}
+
+impl Rem for usize {
+    type Output = Self;
+
+    fn rem(self, rhs: Self) -> Self {
+        self % rhs
+    }
+}
+
+#[lang = "bitor"]
+pub trait BitOr<RHS = Self> {
+    type Output;
+
+    #[must_use]
+    fn bitor(self, rhs: RHS) -> Self::Output;
+}
+
+impl BitOr for bool {
+    type Output = bool;
+
+    fn bitor(self, rhs: bool) -> bool {
+        self | rhs
+    }
+}
+
+impl<'a> BitOr<bool> for &'a bool {
+    type Output = bool;
+
+    fn bitor(self, rhs: bool) -> bool {
+        *self | rhs
+    }
+}
+
+#[lang = "eq"]
+pub trait PartialEq<Rhs: ?Sized = Self> {
+    fn eq(&self, other: &Rhs) -> bool;
+    fn ne(&self, other: &Rhs) -> bool;
+}
+
+impl PartialEq for u8 {
+    fn eq(&self, other: &u8) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &u8) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl PartialEq for u16 {
+    fn eq(&self, other: &u16) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &u16) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl PartialEq for u32 {
+    fn eq(&self, other: &u32) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &u32) -> bool {
+        (*self) != (*other)
+    }
+}
+
+
+impl PartialEq for u64 {
+    fn eq(&self, other: &u64) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &u64) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl PartialEq for u128 {
+    fn eq(&self, other: &u128) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &u128) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl PartialEq for usize {
+    fn eq(&self, other: &usize) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &usize) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl PartialEq for i8 {
+    fn eq(&self, other: &i8) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &i8) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl PartialEq for i32 {
+    fn eq(&self, other: &i32) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &i32) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl PartialEq for isize {
+    fn eq(&self, other: &isize) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &isize) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl PartialEq for char {
+    fn eq(&self, other: &char) -> bool {
+        (*self) == (*other)
+    }
+    fn ne(&self, other: &char) -> bool {
+        (*self) != (*other)
+    }
+}
+
+impl<T: ?Sized> PartialEq for *const T {
+    fn eq(&self, other: &*const T) -> bool {
+        *self == *other
+    }
+    fn ne(&self, other: &*const T) -> bool {
+        *self != *other
+    }
+}
+
+impl <T: PartialEq> PartialEq for Option<T> {
+    fn eq(&self, other: &Self) -> bool {
+        match (self, other) {
+            (Some(lhs), Some(rhs)) => *lhs == *rhs,
+            (None, None) => true,
+            _ => false,
+        }
+    }
+
+    fn ne(&self, other: &Self) -> bool {
+        match (self, other) {
+            (Some(lhs), Some(rhs)) => *lhs != *rhs,
+            (None, None) => false,
+            _ => true,
+        }
+    }
+}
+
+#[lang = "shl"]
+pub trait Shl<RHS = Self> {
+    type Output;
+
+    #[must_use]
+    fn shl(self, rhs: RHS) -> Self::Output;
+}
+
+impl Shl for u128 {
+    type Output = u128;
+
+    fn shl(self, rhs: u128) -> u128 {
+        self << rhs
+    }
+}
+
+#[lang = "neg"]
+pub trait Neg {
+    type Output;
+
+    fn neg(self) -> Self::Output;
+}
+
+impl Neg for i8 {
+    type Output = i8;
+
+    fn neg(self) -> i8 {
+        -self
+    }
+}
+
+impl Neg for i16 {
+    type Output = i16;
+
+    fn neg(self) -> i16 {
+        self
+    }
+}
+
+impl Neg for isize {
+    type Output = isize;
+
+    fn neg(self) -> isize {
+        -self
+    }
+}
+
+impl Neg for f32 {
+    type Output = f32;
+
+    fn neg(self) -> f32 {
+        -self
+    }
+}
+
+pub enum Option<T> {
+    Some(T),
+    None,
+}
+
+pub use Option::*;
+
+#[lang = "phantom_data"]
+pub struct PhantomData<T: ?Sized>;
+
+#[lang = "fn_once"]
+#[rustc_paren_sugar]
+pub trait FnOnce<Args> {
+    #[lang = "fn_once_output"]
+    type Output;
+
+    extern "rust-call" fn call_once(self, args: Args) -> Self::Output;
+}
+
+#[lang = "fn_mut"]
+#[rustc_paren_sugar]
+pub trait FnMut<Args>: FnOnce<Args> {
+    extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output;
+}
+
+#[lang = "panic"]
+#[track_caller]
+pub fn panic(_msg: &'static str) -> ! {
+    unsafe {
+        libc::puts("Panicking\n\0" as *const str as *const i8);
+        intrinsics::abort();
+    }
+}
+
+#[lang = "panic_bounds_check"]
+#[track_caller]
+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();
+    }
+}
+
+#[lang = "eh_personality"]
+fn eh_personality() -> ! {
+    loop {}
+}
+
+#[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 = "deref"]
+pub trait Deref {
+    type Target: ?Sized;
+
+    fn deref(&self) -> &Self::Target;
+}
+
+#[repr(transparent)]
+#[rustc_layout_scalar_valid_range_start(1)]
+#[rustc_nonnull_optimization_guaranteed]
+pub struct NonNull<T: ?Sized>(pub *const T);
+
+impl<T: ?Sized, U: ?Sized> CoerceUnsized<NonNull<U>> for NonNull<T> where T: Unsize<U> {}
+impl<T: ?Sized, U: ?Sized> DispatchFromDyn<NonNull<U>> for NonNull<T> where T: Unsize<U> {}
+
+pub struct Unique<T: ?Sized> {
+    pub pointer: NonNull<T>,
+    pub _marker: PhantomData<T>,
+}
+
+impl<T: ?Sized, U: ?Sized> CoerceUnsized<Unique<U>> for Unique<T> where T: Unsize<U> {}
+impl<T: ?Sized, U: ?Sized> DispatchFromDyn<Unique<U>> for Unique<T> where T: Unsize<U> {}
+
+#[lang = "owned_box"]
+pub struct Box<T: ?Sized>(Unique<T>, ());
+
+impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Box<U>> for Box<T> {}
+
+impl<T: ?Sized> Drop for Box<T> {
+    fn drop(&mut self) {
+        // drop is currently performed by compiler.
+    }
+}
+
+impl<T: ?Sized> Deref for Box<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        &**self
+    }
+}
+
+#[lang = "exchange_malloc"]
+unsafe fn allocate(size: usize, _align: usize) -> *mut u8 {
+    libc::malloc(size)
+}
+
+#[lang = "box_free"]
+unsafe fn box_free<T: ?Sized>(ptr: Unique<T>, alloc: ()) {
+    libc::free(ptr.pointer.0 as *mut u8);
+}
+
+#[lang = "drop"]
+pub trait Drop {
+    fn drop(&mut self);
+}
+
+#[lang = "manually_drop"]
+#[repr(transparent)]
+pub struct ManuallyDrop<T: ?Sized> {
+    pub value: T,
+}
+
+#[lang = "maybe_uninit"]
+#[repr(transparent)]
+pub union MaybeUninit<T> {
+    pub uninit: (),
+    pub value: ManuallyDrop<T>,
+}
+
+pub mod intrinsics {
+    extern "rust-intrinsic" {
+        pub fn abort() -> !;
+        pub fn size_of<T>() -> usize;
+        pub fn size_of_val<T: ?::Sized>(val: *const T) -> usize;
+        pub fn min_align_of<T>() -> usize;
+        pub fn min_align_of_val<T: ?::Sized>(val: *const T) -> usize;
+        pub fn copy<T>(src: *const T, dst: *mut T, count: usize);
+        pub fn transmute<T, U>(e: T) -> U;
+        pub fn ctlz_nonzero<T>(x: T) -> T;
+        pub fn needs_drop<T: ?::Sized>() -> bool;
+        pub fn bitreverse<T>(x: T) -> T;
+        pub fn bswap<T>(x: T) -> T;
+        pub fn write_bytes<T>(dst: *mut T, val: u8, count: usize);
+    }
+}
+
+pub mod libc {
+    #[cfg_attr(unix, link(name = "c"))]
+    #[cfg_attr(target_env = "msvc", link(name = "msvcrt"))]
+    extern "C" {
+        pub fn puts(s: *const i8) -> i32;
+        pub fn printf(format: *const i8, ...) -> i32;
+        pub fn malloc(size: usize) -> *mut u8;
+        pub fn free(ptr: *mut u8);
+        pub fn memcpy(dst: *mut u8, src: *const u8, size: usize);
+        pub fn memmove(dst: *mut u8, src: *const u8, size: usize);
+        pub fn strncpy(dst: *mut u8, src: *const u8, size: usize);
+    }
+}
+
+#[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]
+    }
+}
+
+extern {
+    type VaListImpl;
+}
+
+#[lang = "va_list"]
+#[repr(transparent)]
+pub struct VaList<'a>(&'a mut VaListImpl);
+
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro stringify($($t:tt)*) { /* compiler built-in */ }
+
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro file() { /* compiler built-in */ }
+
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro line() { /* compiler built-in */ }
+
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro cfg() { /* compiler built-in */ }
+
+#[rustc_builtin_macro]
+#[rustc_macro_transparency = "semitransparent"]
+pub macro global_asm() { /* compiler built-in */ }
+
+pub static A_STATIC: u8 = 42;
+
+#[lang = "panic_location"]
+struct PanicLocation {
+    file: &'static str,
+    line: u32,
+    column: u32,
+}
+
+#[no_mangle]
+#[cfg(not(windows))]
+pub fn get_tls() -> u8 {
+    #[thread_local]
+    static A: u8 = 42;
+
+    A
+}