2beabbbf6f
It makes it sound like the `ExprKind` and `Rvalue` are supposed to represent all pointer related casts, when in reality their just used to share a some enum variants. Make it clear there these are only coercion to make it clear why only some pointer related "casts" are in the enum.
200 lines
8.5 KiB
Diff
200 lines
8.5 KiB
Diff
- // MIR for `main` before Inline
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+ // MIR for `main` after Inline
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fn main() -> () {
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let mut _0: ();
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let _1: std::boxed::Box<std::vec::Vec<u32>>;
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let mut _2: std::vec::Vec<u32>;
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scope 1 {
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debug _x => _1;
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}
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+ scope 2 (inlined Vec::<u32>::new) {
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+ let mut _3: alloc::raw_vec::RawVec<u32>;
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+ }
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+ scope 3 (inlined Box::<Vec<u32>>::new) {
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+ debug x => _2;
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+ let mut _4: usize;
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+ let mut _5: usize;
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+ let mut _6: *mut u8;
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+ let mut _7: *const std::vec::Vec<u32>;
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+ scope 4 {
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+ scope 5 (inlined alloc::alloc::exchange_malloc) {
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+ debug size => _4;
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+ debug align => _5;
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+ let _8: std::alloc::Layout;
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+ let mut _9: std::result::Result<std::ptr::NonNull<[u8]>, std::alloc::AllocError>;
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+ let mut _10: isize;
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+ let mut _12: !;
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+ scope 6 {
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+ debug layout => _8;
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+ let _11: std::ptr::NonNull<[u8]>;
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+ let mut _13: &std::alloc::Global;
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+ scope 8 {
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+ debug ptr => _11;
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+ scope 18 (inlined NonNull::<[u8]>::as_mut_ptr) {
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+ debug self => _11;
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+ let mut _15: std::ptr::NonNull<u8>;
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+ scope 19 (inlined NonNull::<[u8]>::as_non_null_ptr) {
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+ debug self => _11;
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+ let mut _16: *mut u8;
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+ let mut _17: *mut [u8];
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+ scope 20 {
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+ scope 21 (inlined NonNull::<[u8]>::as_ptr) {
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+ debug self => _11;
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+ let mut _18: *const [u8];
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+ }
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+ scope 22 (inlined ptr::mut_ptr::<impl *mut [u8]>::as_mut_ptr) {
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+ debug self => _17;
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+ }
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+ scope 23 (inlined NonNull::<u8>::new_unchecked) {
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+ debug ptr => _16;
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+ let mut _19: *const u8;
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+ scope 24 {
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+ scope 25 (inlined NonNull::<T>::new_unchecked::runtime::<u8>) {
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+ debug ptr => _16;
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+ scope 26 (inlined ptr::mut_ptr::<impl *mut u8>::is_null) {
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+ debug self => _16;
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+ let mut _20: *mut u8;
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+ scope 27 {
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+ scope 28 (inlined ptr::mut_ptr::<impl *mut T>::is_null::runtime_impl) {
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+ debug ptr => _20;
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+ scope 29 (inlined ptr::mut_ptr::<impl *mut u8>::addr) {
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+ debug self => _20;
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+ scope 30 {
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+ scope 31 (inlined ptr::mut_ptr::<impl *mut u8>::cast::<()>) {
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+ debug self => _20;
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ scope 32 (inlined NonNull::<u8>::as_ptr) {
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+ debug self => _15;
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+ let mut _21: *const u8;
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+ }
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+ }
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+ }
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+ scope 17 (inlined <std::alloc::Global as Allocator>::allocate) {
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+ debug self => const _;
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+ debug layout => _8;
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+ }
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+ }
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+ scope 7 {
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+ scope 9 (inlined Layout::from_size_align_unchecked) {
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+ debug size => _4;
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+ debug align => _5;
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+ let mut _14: std::ptr::Alignment;
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+ scope 10 {
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+ scope 11 (inlined std::ptr::Alignment::new_unchecked) {
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+ debug align => _5;
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+ scope 12 {
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+ scope 14 (inlined std::ptr::Alignment::new_unchecked::runtime) {
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+ debug align => _5;
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+ scope 15 (inlined core::num::<impl usize>::is_power_of_two) {
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+ debug self => _5;
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+ scope 16 (inlined core::num::<impl usize>::count_ones) {
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+ debug self => _5;
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+ }
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+ }
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+ }
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+ }
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+ scope 13 {
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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+ }
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bb0: {
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StorageLive(_1);
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StorageLive(_2);
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- _2 = Vec::<u32>::new() -> [return: bb1, unwind unreachable];
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+ StorageLive(_3);
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+ _3 = const _;
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+ _2 = Vec::<u32> { buf: move _3, len: const 0_usize };
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+ StorageDead(_3);
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+ _4 = SizeOf(std::vec::Vec<u32>);
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+ _5 = AlignOf(std::vec::Vec<u32>);
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+ StorageLive(_8);
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+ StorageLive(_11);
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+ StorageLive(_12);
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+ StorageLive(_13);
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+ StorageLive(_14);
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+ _14 = _5 as std::ptr::Alignment (Transmute);
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+ _8 = Layout { size: _4, align: move _14 };
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+ StorageDead(_14);
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+ StorageLive(_9);
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+ _13 = const _;
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+ _9 = std::alloc::Global::alloc_impl(_13, _8, const false) -> [return: bb5, unwind unreachable];
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}
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bb1: {
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- _1 = Box::<Vec<u32>>::new(move _2) -> [return: bb2, unwind unreachable];
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+ StorageDead(_1);
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+ return;
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}
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bb2: {
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+ _12 = handle_alloc_error(_8) -> unwind unreachable;
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+ }
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+
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+ bb3: {
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+ unreachable;
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+ }
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+
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+ bb4: {
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+ _11 = ((_9 as Ok).0: std::ptr::NonNull<[u8]>);
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+ StorageLive(_15);
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+ StorageLive(_16);
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+ StorageLive(_17);
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+ StorageLive(_18);
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+ _18 = (_11.0: *const [u8]);
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+ _17 = move _18 as *mut [u8] (PtrToPtr);
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+ StorageDead(_18);
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+ _16 = _17 as *mut u8 (PtrToPtr);
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+ StorageDead(_17);
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+ StorageLive(_19);
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+ StorageLive(_20);
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+ _19 = _16 as *const u8 (PointerCoercion(MutToConstPointer));
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+ _15 = NonNull::<u8> { pointer: _19 };
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+ StorageDead(_20);
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+ StorageDead(_19);
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+ StorageDead(_16);
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+ StorageLive(_21);
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+ _21 = (_15.0: *const u8);
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+ _6 = move _21 as *mut u8 (PtrToPtr);
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+ StorageDead(_21);
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+ StorageDead(_15);
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+ StorageDead(_9);
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+ StorageDead(_13);
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+ StorageDead(_12);
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+ StorageDead(_11);
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+ StorageDead(_8);
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+ _1 = ShallowInitBox(move _6, std::vec::Vec<u32>);
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+ _7 = (((_1.0: std::ptr::Unique<std::vec::Vec<u32>>).0: std::ptr::NonNull<std::vec::Vec<u32>>).0: *const std::vec::Vec<u32>);
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+ (*_7) = move _2;
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StorageDead(_2);
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_0 = const ();
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- drop(_1) -> [return: bb3, unwind unreachable];
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+ drop(_1) -> [return: bb1, unwind unreachable];
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}
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- bb3: {
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- StorageDead(_1);
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- return;
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+ bb5: {
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+ _10 = discriminant(_9);
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+ switchInt(move _10) -> [0: bb4, 1: bb2, otherwise: bb3];
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}
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}
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