4630d1b23b
Apparently MIR borrowck cares about at least one of these for checking variance. In runtime MIR, though, there's no need for them as `PtrToPtr` does the same thing. (Banning them simplifies passes like GVN that no longer need to handle multiple cast possibilities.)
66 lines
2.1 KiB
Rust
66 lines
2.1 KiB
Rust
// MIR for `slice_get_unchecked_mut_range` after PreCodegen
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fn slice_get_unchecked_mut_range(_1: &mut [u32], _2: std::ops::Range<usize>) -> &mut [u32] {
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debug slice => _1;
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debug index => _2;
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let mut _0: &mut [u32];
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let mut _3: usize;
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let mut _4: usize;
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scope 1 (inlined core::slice::<impl [u32]>::get_unchecked_mut::<std::ops::Range<usize>>) {
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let mut _5: *mut [u32];
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let mut _12: *mut [u32];
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scope 2 (inlined <std::ops::Range<usize> as SliceIndex<[u32]>>::get_unchecked_mut) {
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let mut _7: usize;
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let _8: ();
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let _9: usize;
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scope 3 {
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scope 6 (inlined core::slice::index::get_offset_len_mut_noubcheck::<u32>) {
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let _11: *mut u32;
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scope 7 {
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}
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scope 8 (inlined core::slice::index::get_mut_noubcheck::<u32>) {
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let _10: *mut u32;
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scope 9 {
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}
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}
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}
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}
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scope 4 (inlined std::ptr::mut_ptr::<impl *mut [u32]>::len) {
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let mut _6: *const [u32];
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scope 5 (inlined std::ptr::metadata::<[u32]>) {
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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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_3 = move (_2.0: usize);
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_4 = move (_2.1: usize);
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StorageLive(_5);
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_5 = &raw mut (*_1);
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StorageLive(_9);
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StorageLive(_7);
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StorageLive(_6);
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_6 = _5 as *const [u32] (PtrToPtr);
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_7 = PtrMetadata(_6);
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StorageDead(_6);
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_8 = <std::ops::Range<usize> as SliceIndex<[T]>>::get_unchecked_mut::precondition_check(_3, _4, move _7) -> [return: bb1, unwind unreachable];
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}
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bb1: {
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StorageDead(_7);
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_9 = SubUnchecked(_4, _3);
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StorageLive(_11);
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StorageLive(_10);
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_10 = _5 as *mut u32 (PtrToPtr);
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_11 = Offset(_10, _3);
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StorageDead(_10);
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_12 = *mut [u32] from (_11, _9);
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StorageDead(_11);
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StorageDead(_9);
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StorageDead(_5);
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_0 = &mut (*_12);
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return;
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}
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}
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