rust/tests/mir-opt/pre-codegen/slice_iter.reverse_loop.PreCodegen.after.mir

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// MIR for `reverse_loop` after PreCodegen
fn reverse_loop(_1: &[T], _2: impl Fn(&T)) -> () {
debug slice => _1; // in scope 0 at $DIR/slice_iter.rs:+0:28: +0:33
debug f => _2; // in scope 0 at $DIR/slice_iter.rs:+0:44: +0:45
let mut _0: (); // return place in scope 0 at $DIR/slice_iter.rs:+0:60: +0:60
let mut _3: std::iter::Rev<std::slice::Iter<'_, T>>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
let mut _4: std::slice::Iter<'_, T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
let mut _5: std::iter::Rev<std::slice::Iter<'_, T>>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
let _6: (); // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
let mut _7: std::option::Option<&T>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
let mut _8: &mut std::iter::Rev<std::slice::Iter<'_, T>>; // in scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
let mut _9: isize; // in scope 0 at $DIR/slice_iter.rs:+1:5: +3:6
let mut _11: &impl Fn(&T); // in scope 0 at $DIR/slice_iter.rs:+2:9: +2:10
let mut _12: (&T,); // in scope 0 at $DIR/slice_iter.rs:+2:9: +2:13
scope 1 {
debug iter => _5; // in scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
let _10: &T; // in scope 1 at $DIR/slice_iter.rs:+1:9: +1:10
scope 2 {
debug x => _10; // in scope 2 at $DIR/slice_iter.rs:+1:9: +1:10
}
scope 7 (inlined <Rev<std::slice::Iter<'_, T>> as Iterator>::next) { // at $DIR/slice_iter.rs:35:14: 35:32
debug self => _8; // in scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
let mut _13: &mut std::slice::Iter<'_, T>; // in scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
}
}
scope 3 (inlined core::slice::<impl [T]>::iter) { // at $DIR/slice_iter.rs:35:20: 35:26
debug self => _1; // in scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
}
scope 4 (inlined <std::slice::Iter<'_, T> as Iterator>::rev) { // at $DIR/slice_iter.rs:35:27: 35:32
debug self => _4; // in scope 4 at $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
scope 5 (inlined Rev::<std::slice::Iter<'_, T>>::new) { // at $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL
debug iter => _4; // in scope 5 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
}
}
scope 6 (inlined <Rev<std::slice::Iter<'_, T>> as IntoIterator>::into_iter) { // at $DIR/slice_iter.rs:35:14: 35:32
debug self => _3; // in scope 6 at $SRC_DIR/core/src/iter/traits/collect.rs:LL:COL
}
bb0: {
StorageLive(_4); // scope 0 at $DIR/slice_iter.rs:+1:14: +1:26
_4 = std::slice::Iter::<'_, T>::new(_1) -> [return: bb9, unwind: bb7]; // scope 3 at $SRC_DIR/core/src/slice/mod.rs:LL:COL
// mir::Constant
// + span: $SRC_DIR/core/src/slice/mod.rs:LL:COL
// + user_ty: UserType(0)
// + literal: Const { ty: fn(&[T]) -> std::slice::Iter<'_, T> {std::slice::Iter::<'_, T>::new}, val: Value(<ZST>) }
}
bb1: {
StorageLive(_7); // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
_8 = &mut _5; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
StorageLive(_13); // scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
_13 = &mut ((*_8).0: std::slice::Iter<'_, T>); // scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
_7 = <std::slice::Iter<'_, T> as DoubleEndedIterator>::next_back(move _13) -> [return: bb10, unwind: bb7]; // scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
// mir::Constant
// + span: $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
// + literal: Const { ty: for<'a> fn(&'a mut std::slice::Iter<'_, T>) -> Option<<std::slice::Iter<'_, T> as Iterator>::Item> {<std::slice::Iter<'_, T> as DoubleEndedIterator>::next_back}, val: Value(<ZST>) }
}
bb2: {
_10 = ((_7 as Some).0: &T); // scope 1 at $DIR/slice_iter.rs:+1:9: +1:10
StorageLive(_11); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:10
_11 = &_2; // scope 2 at $DIR/slice_iter.rs:+2:9: +2:10
StorageLive(_12); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
_12 = (_10,); // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
_6 = <impl Fn(&T) as Fn<(&T,)>>::call(move _11, move _12) -> [return: bb5, unwind: bb7]; // scope 2 at $DIR/slice_iter.rs:+2:9: +2:13
// mir::Constant
// + span: $DIR/slice_iter.rs:36:9: 36:10
// + literal: Const { ty: for<'a> extern "rust-call" fn(&'a impl Fn(&T), (&T,)) -> <impl Fn(&T) as FnOnce<(&T,)>>::Output {<impl Fn(&T) as Fn<(&T,)>>::call}, val: Value(<ZST>) }
}
bb3: {
unreachable; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
}
bb4: {
StorageDead(_7); // scope 1 at $DIR/slice_iter.rs:+3:5: +3:6
StorageDead(_5); // scope 0 at $DIR/slice_iter.rs:+3:5: +3:6
drop(_2) -> bb6; // scope 0 at $DIR/slice_iter.rs:+4:1: +4:2
}
bb5: {
StorageDead(_12); // scope 2 at $DIR/slice_iter.rs:+2:12: +2:13
StorageDead(_11); // scope 2 at $DIR/slice_iter.rs:+2:12: +2:13
StorageDead(_7); // scope 1 at $DIR/slice_iter.rs:+3:5: +3:6
goto -> bb1; // scope 1 at $DIR/slice_iter.rs:+1:5: +3:6
}
bb6: {
return; // scope 0 at $DIR/slice_iter.rs:+4:2: +4:2
}
bb7 (cleanup): {
drop(_2) -> [return: bb8, unwind terminate]; // scope 0 at $DIR/slice_iter.rs:+4:1: +4:2
}
bb8 (cleanup): {
resume; // scope 0 at $DIR/slice_iter.rs:+0:1: +4:2
}
bb9: {
_3 = Rev::<std::slice::Iter<'_, T>> { iter: move _4 }; // scope 5 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
StorageDead(_4); // scope 0 at $DIR/slice_iter.rs:+1:31: +1:32
StorageLive(_5); // scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
_5 = move _3; // scope 0 at $DIR/slice_iter.rs:+1:14: +1:32
goto -> bb1; // scope 1 at $DIR/slice_iter.rs:+1:5: +3:6
}
bb10: {
StorageDead(_13); // scope 7 at $SRC_DIR/core/src/iter/adapters/rev.rs:LL:COL
_9 = discriminant(_7); // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
switchInt(move _9) -> [0: bb4, 1: bb2, otherwise: bb3]; // scope 1 at $DIR/slice_iter.rs:+1:14: +1:32
}
}