111 lines
3.7 KiB
Diff
111 lines
3.7 KiB
Diff
- // MIR for `main` before GVN
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+ // MIR for `main` after GVN
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fn main() -> () {
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let mut _0: ();
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let _1: std::alloc::Layout;
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let mut _2: std::option::Option<std::alloc::Layout>;
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let mut _3: *mut u8;
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let mut _4: *mut [u8];
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let mut _5: std::ptr::NonNull<[u8]>;
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let mut _6: std::result::Result<std::ptr::NonNull<[u8]>, std::alloc::AllocError>;
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let mut _7: &std::alloc::Global;
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let mut _8: std::alloc::Layout;
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scope 1 {
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debug layout => _1;
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let mut _9: &std::alloc::Global;
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scope 2 {
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debug ptr => _3;
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}
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scope 5 (inlined <std::alloc::Global as Allocator>::allocate) {
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debug self => _9;
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debug layout => _8;
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}
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scope 6 (inlined NonNull::<[u8]>::as_ptr) {
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debug self => _5;
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let mut _12: *const [u8];
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}
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}
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scope 3 (inlined #[track_caller] Option::<Layout>::unwrap) {
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debug self => _2;
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let mut _10: isize;
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let mut _11: !;
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scope 4 {
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debug val => _1;
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}
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}
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bb0: {
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- StorageLive(_1);
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+ nop;
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StorageLive(_2);
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- _2 = Option::<Layout>::None;
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+ _2 = const Option::<Layout>::None;
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StorageLive(_10);
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- _10 = discriminant(_2);
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- switchInt(move _10) -> [0: bb3, 1: bb4, otherwise: bb2];
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+ _10 = const 0_isize;
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+ switchInt(const 0_isize) -> [0: bb3, 1: bb4, otherwise: bb2];
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}
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bb1: {
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StorageDead(_6);
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- StorageLive(_12);
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+ nop;
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_12 = (_5.0: *const [u8]);
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- _4 = move _12 as *mut [u8] (PtrToPtr);
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- StorageDead(_12);
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+ _4 = _12 as *mut [u8] (PtrToPtr);
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+ nop;
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StorageDead(_5);
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- _3 = move _4 as *mut u8 (PtrToPtr);
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+ _3 = _12 as *mut u8 (PtrToPtr);
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StorageDead(_4);
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StorageDead(_3);
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- StorageDead(_1);
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+ nop;
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return;
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}
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bb2: {
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unreachable;
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}
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bb3: {
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_11 = option::unwrap_failed() -> unwind continue;
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}
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bb4: {
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- _1 = move ((_2 as Some).0: std::alloc::Layout);
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+ _1 = const Layout {{ size: Indirect { alloc_id: ALLOC0, offset: Size(4 bytes) }: usize, align: std::ptr::Alignment(Scalar(0x00000000): std::ptr::alignment::AlignmentEnum) }};
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StorageDead(_10);
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StorageDead(_2);
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StorageLive(_3);
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StorageLive(_4);
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StorageLive(_5);
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StorageLive(_6);
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StorageLive(_7);
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_9 = const main::promoted[0];
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- _7 = _9;
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+ _7 = const {ALLOC1<imm>: &std::alloc::Global};
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StorageLive(_8);
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- _8 = _1;
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- _6 = std::alloc::Global::alloc_impl(move _7, move _8, const false) -> [return: bb5, unwind continue];
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+ _8 = const Layout {{ size: Indirect { alloc_id: ALLOC0, offset: Size(4 bytes) }: usize, align: std::ptr::Alignment(Scalar(0x00000000): std::ptr::alignment::AlignmentEnum) }};
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+ _6 = std::alloc::Global::alloc_impl(const {ALLOC1<imm>: &std::alloc::Global}, const Layout {{ size: Indirect { alloc_id: ALLOC0, offset: Size(4 bytes) }: usize, align: std::ptr::Alignment(Scalar(0x00000000): std::ptr::alignment::AlignmentEnum) }}, const false) -> [return: bb5, unwind continue];
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}
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bb5: {
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StorageDead(_8);
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StorageDead(_7);
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_5 = Result::<NonNull<[u8]>, std::alloc::AllocError>::unwrap(move _6) -> [return: bb1, unwind continue];
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}
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}
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+
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+ ALLOC0 (size: 8, align: 4) {
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+ 00 00 00 00 __ __ __ __ │ ....░░░░
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+ }
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+
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+ ALLOC1 (size: 0, align: 1) {}
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