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scottmcmscottmcm
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Add a mir-opt test for byte_add on pointers
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‎tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-abort.mir

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// MIR for `demo_byte_add_fat` after PreCodegen
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fn demo_byte_add_fat(_1: *const [u32], _2: usize) -> *const [u32] {
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debug p => _1;
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debug n => _2;
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let mut _0: *const [u32];
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scope 1 (inlined std::ptr::const_ptr::<impl *const [u32]>::byte_add) {
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debug self => _1;
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debug count => _2;
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let mut _3: *const u8;
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let mut _4: *const u8;
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scope 2 (inlined std::ptr::const_ptr::<impl *const [u32]>::cast::<u8>) {
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debug self => _1;
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}
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scope 3 (inlined std::ptr::const_ptr::<impl *const u8>::add) {
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debug self => _3;
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debug count => _2;
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}
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scope 4 (inlined std::ptr::const_ptr::<impl *const u8>::with_metadata_of::<[u32]>) {
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debug self => _4;
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debug meta => _1;
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let mut _5: *const ();
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let mut _7: usize;
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scope 5 (inlined std::ptr::metadata::<[u32]>) {
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debug ptr => _1;
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let mut _6: std::ptr::metadata::PtrRepr<[u32]>;
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}
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scope 6 (inlined std::ptr::from_raw_parts::<[u32]>) {
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debug data_pointer => _5;
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debug metadata => _7;
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let mut _8: std::ptr::metadata::PtrComponents<[u32]>;
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let mut _9: std::ptr::metadata::PtrRepr<[u32]>;
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}
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}
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}
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bb0: {
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StorageLive(_4);
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StorageLive(_3);
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_3 = _1 as *const u8 (PtrToPtr);
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_4 = Offset(_3, _2);
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StorageDead(_3);
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StorageLive(_5);
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_5 = _4 as *const () (PtrToPtr);
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StorageLive(_7);
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StorageLive(_6);
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_6 = std::ptr::metadata::PtrRepr::<[u32]> { const_ptr: _1 };
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_7 = ((_6.2: std::ptr::metadata::PtrComponents<[u32]>).1: usize);
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StorageDead(_6);
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StorageLive(_9);
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StorageLive(_8);
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_8 = std::ptr::metadata::PtrComponents::<[u32]> { data_pointer: _5, metadata: _7 };
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_9 = std::ptr::metadata::PtrRepr::<[u32]> { const_ptr: move _8 };
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StorageDead(_8);
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_0 = (_9.0: *const [u32]);
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StorageDead(_9);
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StorageDead(_7);
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StorageDead(_5);
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StorageDead(_4);
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return;
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}
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}

‎tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_fat.PreCodegen.after.panic-unwind.mir

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// MIR for `demo_byte_add_fat` after PreCodegen
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fn demo_byte_add_fat(_1: *const [u32], _2: usize) -> *const [u32] {
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debug p => _1;
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debug n => _2;
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let mut _0: *const [u32];
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scope 1 (inlined std::ptr::const_ptr::<impl *const [u32]>::byte_add) {
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debug self => _1;
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debug count => _2;
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let mut _3: *const u8;
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let mut _4: *const u8;
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scope 2 (inlined std::ptr::const_ptr::<impl *const [u32]>::cast::<u8>) {
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debug self => _1;
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}
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scope 3 (inlined std::ptr::const_ptr::<impl *const u8>::add) {
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debug self => _3;
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debug count => _2;
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}
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scope 4 (inlined std::ptr::const_ptr::<impl *const u8>::with_metadata_of::<[u32]>) {
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debug self => _4;
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debug meta => _1;
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let mut _5: *const ();
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let mut _7: usize;
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scope 5 (inlined std::ptr::metadata::<[u32]>) {
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debug ptr => _1;
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let mut _6: std::ptr::metadata::PtrRepr<[u32]>;
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}
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scope 6 (inlined std::ptr::from_raw_parts::<[u32]>) {
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debug data_pointer => _5;
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debug metadata => _7;
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let mut _8: std::ptr::metadata::PtrComponents<[u32]>;
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let mut _9: std::ptr::metadata::PtrRepr<[u32]>;
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}
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}
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}
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bb0: {
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StorageLive(_4);
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StorageLive(_3);
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_3 = _1 as *const u8 (PtrToPtr);
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_4 = Offset(_3, _2);
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StorageDead(_3);
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StorageLive(_5);
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_5 = _4 as *const () (PtrToPtr);
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StorageLive(_7);
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StorageLive(_6);
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_6 = std::ptr::metadata::PtrRepr::<[u32]> { const_ptr: _1 };
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_7 = ((_6.2: std::ptr::metadata::PtrComponents<[u32]>).1: usize);
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StorageDead(_6);
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StorageLive(_9);
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StorageLive(_8);
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_8 = std::ptr::metadata::PtrComponents::<[u32]> { data_pointer: _5, metadata: _7 };
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_9 = std::ptr::metadata::PtrRepr::<[u32]> { const_ptr: move _8 };
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StorageDead(_8);
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_0 = (_9.0: *const [u32]);
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StorageDead(_9);
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StorageDead(_7);
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StorageDead(_5);
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StorageDead(_4);
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return;
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}
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}

‎tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-abort.mir

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// MIR for `demo_byte_add_thin` after PreCodegen
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fn demo_byte_add_thin(_1: *const u32, _2: usize) -> *const u32 {
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debug p => _1;
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debug n => _2;
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let mut _0: *const u32;
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scope 1 (inlined std::ptr::const_ptr::<impl *const u32>::byte_add) {
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debug self => _1;
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debug count => _2;
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let mut _3: *const u8;
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let mut _4: *const u8;
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scope 2 (inlined std::ptr::const_ptr::<impl *const u32>::cast::<u8>) {
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debug self => _1;
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}
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scope 3 (inlined std::ptr::const_ptr::<impl *const u8>::add) {
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debug self => _3;
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debug count => _2;
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}
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scope 4 (inlined std::ptr::const_ptr::<impl *const u8>::with_metadata_of::<u32>) {
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debug self => _4;
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debug meta => _1;
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let mut _5: *const ();
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scope 5 (inlined std::ptr::metadata::<u32>) {
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debug ptr => _1;
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}
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scope 6 (inlined std::ptr::from_raw_parts::<u32>) {
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debug data_pointer => _5;
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debug metadata => const ();
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let mut _6: std::ptr::metadata::PtrComponents<u32>;
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let mut _7: std::ptr::metadata::PtrRepr<u32>;
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}
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}
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}
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bb0: {
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StorageLive(_4);
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StorageLive(_3);
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_3 = _1 as *const u8 (PtrToPtr);
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_4 = Offset(_3, _2);
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StorageDead(_3);
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StorageLive(_5);
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_5 = _4 as *const () (PtrToPtr);
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StorageLive(_7);
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StorageLive(_6);
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_6 = std::ptr::metadata::PtrComponents::<u32> { data_pointer: _5, metadata: const () };
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_7 = std::ptr::metadata::PtrRepr::<u32> { const_ptr: move _6 };
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StorageDead(_6);
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_0 = (_7.0: *const u32);
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StorageDead(_7);
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StorageDead(_5);
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StorageDead(_4);
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return;
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}
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}

‎tests/mir-opt/pre-codegen/ptr_offset.demo_byte_add_thin.PreCodegen.after.panic-unwind.mir

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// MIR for `demo_byte_add_thin` after PreCodegen
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fn demo_byte_add_thin(_1: *const u32, _2: usize) -> *const u32 {
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debug p => _1;
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debug n => _2;
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let mut _0: *const u32;
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scope 1 (inlined std::ptr::const_ptr::<impl *const u32>::byte_add) {
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debug self => _1;
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debug count => _2;
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let mut _3: *const u8;
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let mut _4: *const u8;
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scope 2 (inlined std::ptr::const_ptr::<impl *const u32>::cast::<u8>) {
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debug self => _1;
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}
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scope 3 (inlined std::ptr::const_ptr::<impl *const u8>::add) {
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debug self => _3;
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debug count => _2;
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}
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scope 4 (inlined std::ptr::const_ptr::<impl *const u8>::with_metadata_of::<u32>) {
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debug self => _4;
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debug meta => _1;
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let mut _5: *const ();
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scope 5 (inlined std::ptr::metadata::<u32>) {
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debug ptr => _1;
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}
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scope 6 (inlined std::ptr::from_raw_parts::<u32>) {
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debug data_pointer => _5;
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debug metadata => const ();
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let mut _6: std::ptr::metadata::PtrComponents<u32>;
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let mut _7: std::ptr::metadata::PtrRepr<u32>;
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}
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}
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}
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bb0: {
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StorageLive(_4);
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StorageLive(_3);
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_3 = _1 as *const u8 (PtrToPtr);
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_4 = Offset(_3, _2);
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StorageDead(_3);
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StorageLive(_5);
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_5 = _4 as *const () (PtrToPtr);
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StorageLive(_7);
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StorageLive(_6);
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_6 = std::ptr::metadata::PtrComponents::<u32> { data_pointer: _5, metadata: const () };
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_7 = std::ptr::metadata::PtrRepr::<u32> { const_ptr: move _6 };
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StorageDead(_6);
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_0 = (_7.0: *const u32);
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StorageDead(_7);
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StorageDead(_5);
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StorageDead(_4);
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return;
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}
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}

‎tests/mir-opt/pre-codegen/ptr_offset.rs

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// skip-filecheck
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//@ compile-flags: -O -C debuginfo=0 -Zmir-opt-level=2 -Zinline-mir
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//@ ignore-debug: precondition checks are under cfg(debug_assertions)
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// EMIT_MIR_FOR_EACH_PANIC_STRATEGY
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#![crate_type = "lib"]
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// EMIT_MIR ptr_offset.demo_byte_add_thin.PreCodegen.after.mir
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pub unsafe fn demo_byte_add_thin(p: *const u32, n: usize) -> *const u32 {
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p.byte_add(n)
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}
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// EMIT_MIR ptr_offset.demo_byte_add_fat.PreCodegen.after.mir
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pub unsafe fn demo_byte_add_fat(p: *const [u32], n: usize) -> *const [u32] {
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p.byte_add(n)
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}

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