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Elide superfluous storage markers #99946

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merged 5 commits into from
Aug 25, 2022
Merged

Elide superfluous storage markers #99946

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943a380
Elide storage markers when elaborating box derefs
tmiasko Jul 30, 2022
162bd16
Elide storage markers when elaborating deref projections
tmiasko Jul 30, 2022
625af2c
Elide storage markers for internal locals when inlining
tmiasko Jul 30, 2022
c2b74f9
Remove support for adding statement to all successors
tmiasko Jul 30, 2022
f8ca6aa
./x.py test --bless
tmiasko Aug 23, 2022
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./x.py test --bless
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@tmiasko
tmiasko committed Aug 23, 2022
commit f8ca6aad83ff815579a85b26c7e617138b488681
4 changes: 0 additions & 4 deletions src/test/mir-opt/const_prop/boxes.main.ConstProp.diff
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Expand Up @@ -35,16 +35,12 @@
bb1: {
StorageLive(_7); // scope 0 at $DIR/boxes.rs:+1:14: +1:22
_7 = ShallowInitBox(move _6, i32); // scope 0 at $DIR/boxes.rs:+1:14: +1:22
StorageLive(_8); // scope 0 at $DIR/boxes.rs:+1:19: +1:21
_8 = (((_7.0: std::ptr::Unique<i32>).0: std::ptr::NonNull<i32>).0: *const i32); // scope 0 at $DIR/boxes.rs:+1:19: +1:21
(*_8) = const 42_i32; // scope 0 at $DIR/boxes.rs:+1:19: +1:21
StorageDead(_8); // scope 0 at $DIR/boxes.rs:+1:14: +1:22
_3 = move _7; // scope 0 at $DIR/boxes.rs:+1:14: +1:22
StorageDead(_7); // scope 0 at $DIR/boxes.rs:+1:21: +1:22
StorageLive(_9); // scope 0 at $DIR/boxes.rs:+1:13: +1:22
_9 = (((_3.0: std::ptr::Unique<i32>).0: std::ptr::NonNull<i32>).0: *const i32); // scope 0 at $DIR/boxes.rs:+1:13: +1:22
_2 = (*_9); // scope 0 at $DIR/boxes.rs:+1:13: +1:22
StorageDead(_9); // scope 0 at $DIR/boxes.rs:+1:13: +1:26
_1 = Add(move _2, const 0_i32); // scope 0 at $DIR/boxes.rs:+1:13: +1:26
StorageDead(_2); // scope 0 at $DIR/boxes.rs:+1:25: +1:26
drop(_3) -> [return: bb2, unwind: bb3]; // scope 0 at $DIR/boxes.rs:+1:26: +1:27
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2 changes: 0 additions & 2 deletions src/test/mir-opt/derefer_complex_case.main.Derefer.diff
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Expand Up @@ -68,10 +68,8 @@
bb4: {
StorageLive(_12); // scope 1 at $DIR/derefer_complex_case.rs:+1:10: +1:13
- _12 = (*((_7 as Some).0: &i32)); // scope 1 at $DIR/derefer_complex_case.rs:+1:10: +1:13
+ StorageLive(_15); // scope 1 at $DIR/derefer_complex_case.rs:+1:10: +1:13
+ _15 = deref_copy ((_7 as Some).0: &i32); // scope 1 at $DIR/derefer_complex_case.rs:+1:10: +1:13
+ _12 = (*_15); // scope 1 at $DIR/derefer_complex_case.rs:+1:10: +1:13
+ StorageDead(_15); // scope 2 at $DIR/derefer_complex_case.rs:+1:34: +1:37
StorageLive(_13); // scope 2 at $DIR/derefer_complex_case.rs:+1:34: +1:37
_13 = _12; // scope 2 at $DIR/derefer_complex_case.rs:+1:34: +1:37
_6 = std::mem::drop::<i32>(move _13) -> bb7; // scope 2 at $DIR/derefer_complex_case.rs:+1:29: +1:38
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7 changes: 0 additions & 7 deletions src/test/mir-opt/derefer_terminator_test.main.Derefer.diff
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Expand Up @@ -55,25 +55,18 @@
_5 = &_6; // scope 2 at $DIR/derefer_terminator_test.rs:+3:17: +3:21
_4 = &_5; // scope 2 at $DIR/derefer_terminator_test.rs:+3:15: +3:22
- switchInt((*(*(*(*_4))))) -> [false: bb3, otherwise: bb4]; // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ StorageLive(_10); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ _10 = deref_copy (*_4); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ StorageLive(_11); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ _11 = deref_copy (*_10); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ StorageDead(_10); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ StorageLive(_12); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ _12 = deref_copy (*_11); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ StorageDead(_11); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
+ switchInt((*_12)) -> [false: bb3, otherwise: bb4]; // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
}

bb3: {
+ StorageDead(_12); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
_3 = const (); // scope 2 at $DIR/derefer_terminator_test.rs:+5:18: +5:20
goto -> bb5; // scope 2 at $DIR/derefer_terminator_test.rs:+5:18: +5:20
}

bb4: {
+ StorageDead(_12); // scope 2 at $DIR/derefer_terminator_test.rs:+3:5: +3:22
StorageLive(_8); // scope 2 at $DIR/derefer_terminator_test.rs:+4:22: +4:23
_8 = const 5_i32; // scope 2 at $DIR/derefer_terminator_test.rs:+4:26: +4:27
_3 = const (); // scope 2 at $DIR/derefer_terminator_test.rs:+4:17: +4:29
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4 changes: 0 additions & 4 deletions src/test/mir-opt/derefer_test.main.Derefer.diff
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Expand Up @@ -33,16 +33,12 @@
StorageDead(_3); // scope 1 at $DIR/derefer_test.rs:+2:28: +2:29
StorageLive(_4); // scope 2 at $DIR/derefer_test.rs:+3:9: +3:10
- _4 = &mut ((*(_2.1: &mut (i32, i32))).0: i32); // scope 2 at $DIR/derefer_test.rs:+3:13: +3:26
+ StorageLive(_6); // scope 2 at $DIR/derefer_test.rs:+3:13: +3:26
+ _6 = deref_copy (_2.1: &mut (i32, i32)); // scope 2 at $DIR/derefer_test.rs:+3:13: +3:26
+ _4 = &mut ((*_6).0: i32); // scope 2 at $DIR/derefer_test.rs:+3:13: +3:26
+ StorageDead(_6); // scope 3 at $DIR/derefer_test.rs:+4:9: +4:10
StorageLive(_5); // scope 3 at $DIR/derefer_test.rs:+4:9: +4:10
- _5 = &mut ((*(_2.1: &mut (i32, i32))).1: i32); // scope 3 at $DIR/derefer_test.rs:+4:13: +4:26
+ StorageLive(_7); // scope 3 at $DIR/derefer_test.rs:+4:13: +4:26
+ _7 = deref_copy (_2.1: &mut (i32, i32)); // scope 3 at $DIR/derefer_test.rs:+4:13: +4:26
+ _5 = &mut ((*_7).1: i32); // scope 3 at $DIR/derefer_test.rs:+4:13: +4:26
+ StorageDead(_7); // scope 0 at $DIR/derefer_test.rs:+0:11: +5:2
_0 = const (); // scope 0 at $DIR/derefer_test.rs:+0:11: +5:2
StorageDead(_5); // scope 3 at $DIR/derefer_test.rs:+5:1: +5:2
StorageDead(_4); // scope 2 at $DIR/derefer_test.rs:+5:1: +5:2
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12 changes: 0 additions & 12 deletions src/test/mir-opt/derefer_test_multiple.main.Derefer.diff
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Expand Up @@ -57,28 +57,16 @@
StorageDead(_7); // scope 3 at $DIR/derefer_test_multiple.rs:+4:28: +4:29
StorageLive(_8); // scope 4 at $DIR/derefer_test_multiple.rs:+5:9: +5:10
- _8 = &mut ((*((*((*(_6.1: &mut (i32, &mut (i32, &mut (i32, i32))))).1: &mut (i32, &mut (i32, i32)))).1: &mut (i32, i32))).1: i32); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ StorageLive(_10); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ _10 = deref_copy (_6.1: &mut (i32, &mut (i32, &mut (i32, i32)))); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ StorageLive(_11); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ _11 = deref_copy ((*_10).1: &mut (i32, &mut (i32, i32))); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ StorageDead(_10); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ StorageLive(_12); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ _12 = deref_copy ((*_11).1: &mut (i32, i32)); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ StorageDead(_11); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ _8 = &mut ((*_12).1: i32); // scope 4 at $DIR/derefer_test_multiple.rs:+5:13: +5:30
+ StorageDead(_12); // scope 5 at $DIR/derefer_test_multiple.rs:+6:9: +6:10
StorageLive(_9); // scope 5 at $DIR/derefer_test_multiple.rs:+6:9: +6:10
- _9 = &mut ((*((*((*(_6.1: &mut (i32, &mut (i32, &mut (i32, i32))))).1: &mut (i32, &mut (i32, i32)))).1: &mut (i32, i32))).1: i32); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ StorageLive(_13); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ _13 = deref_copy (_6.1: &mut (i32, &mut (i32, &mut (i32, i32)))); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ StorageLive(_14); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ _14 = deref_copy ((*_13).1: &mut (i32, &mut (i32, i32))); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ StorageDead(_13); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ StorageLive(_15); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ _15 = deref_copy ((*_14).1: &mut (i32, i32)); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ StorageDead(_14); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ _9 = &mut ((*_15).1: i32); // scope 5 at $DIR/derefer_test_multiple.rs:+6:13: +6:30
+ StorageDead(_15); // scope 0 at $DIR/derefer_test_multiple.rs:+0:12: +7:2
_0 = const (); // scope 0 at $DIR/derefer_test_multiple.rs:+0:12: +7:2
StorageDead(_9); // scope 5 at $DIR/derefer_test_multiple.rs:+7:1: +7:2
StorageDead(_8); // scope 4 at $DIR/derefer_test_multiple.rs:+7:1: +7:2
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