Skip to content

Commit 4462bb5

Browse files
cjgillotcjgillot
committed
Introduce a no-op PlaceMention statement for let _ =.
1 parent be758ef commit 4462bb5

Some content is hidden

Large Commits have some content hidden by default. Use the searchbox below for content that may be hidden.

44 files changed

+139
-20
lines changed

‎compiler/rustc_borrowck/src/dataflow.rs

+1
Original file line numberDiff line numberDiff line change
@@ -390,6 +390,7 @@ impl<'tcx> rustc_mir_dataflow::GenKillAnalysis<'tcx> for Borrows<'_, 'tcx> {
390390
| mir::StatementKind::Deinit(..)
391391
| mir::StatementKind::StorageLive(..)
392392
| mir::StatementKind::Retag { .. }
393+
| mir::StatementKind::PlaceMention(..)
393394
| mir::StatementKind::AscribeUserType(..)
394395
| mir::StatementKind::Coverage(..)
395396
| mir::StatementKind::Intrinsic(..)

‎compiler/rustc_borrowck/src/def_use.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -73,7 +73,7 @@ pub fn categorize(context: PlaceContext) -> Option<DefUse> {
7373
Some(DefUse::Drop),
7474

7575
// Debug info is neither def nor use.
76-
PlaceContext::NonUse(NonUseContext::VarDebugInfo) => None,
76+
PlaceContext::NonUse(NonUseContext::PlaceMention | NonUseContext::VarDebugInfo) => None,
7777

7878
PlaceContext::MutatingUse(MutatingUseContext::Deinit | MutatingUseContext::SetDiscriminant) => {
7979
bug!("These statements are not allowed in this MIR phase")

‎compiler/rustc_borrowck/src/invalidation.rs

+2
Original file line numberDiff line numberDiff line change
@@ -79,6 +79,8 @@ impl<'cx, 'tcx> Visitor<'tcx> for InvalidationGenerator<'cx, 'tcx> {
7979
}
8080
// Only relevant for mir typeck
8181
StatementKind::AscribeUserType(..)
82+
// Only relevant for unsafeck
83+
| StatementKind::PlaceMention(..)
8284
// Doesn't have any language semantics
8385
| StatementKind::Coverage(..)
8486
// Does not actually affect borrowck

‎compiler/rustc_borrowck/src/lib.rs

+2
Original file line numberDiff line numberDiff line change
@@ -690,6 +690,8 @@ impl<'cx, 'tcx> rustc_mir_dataflow::ResultsVisitor<'cx, 'tcx> for MirBorrowckCtx
690690
}
691691
// Only relevant for mir typeck
692692
StatementKind::AscribeUserType(..)
693+
// Only relevant for unsafeck
694+
| StatementKind::PlaceMention(..)
693695
// Doesn't have any language semantics
694696
| StatementKind::Coverage(..)
695697
// These do not actually affect borrowck

‎compiler/rustc_borrowck/src/type_check/mod.rs

+4-1
Original file line numberDiff line numberDiff line change
@@ -772,7 +772,9 @@ impl<'a, 'b, 'tcx> TypeVerifier<'a, 'b, 'tcx> {
772772

773773
match context {
774774
PlaceContext::MutatingUse(_) => ty::Invariant,
775-
PlaceContext::NonUse(StorageDead | StorageLive | VarDebugInfo) => ty::Invariant,
775+
PlaceContext::NonUse(StorageDead | StorageLive | PlaceMention | VarDebugInfo) => {
776+
ty::Invariant
777+
}
776778
PlaceContext::NonMutatingUse(
777779
Inspect | Copy | Move | SharedBorrow | ShallowBorrow | UniqueBorrow | AddressOf
778780
| Projection,
@@ -1282,6 +1284,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
12821284
| StatementKind::Retag { .. }
12831285
| StatementKind::Coverage(..)
12841286
| StatementKind::ConstEvalCounter
1287+
| StatementKind::PlaceMention(..)
12851288
| StatementKind::Nop => {}
12861289
StatementKind::Deinit(..) | StatementKind::SetDiscriminant { .. } => {
12871290
bug!("Statement not allowed in this MIR phase")

‎compiler/rustc_codegen_cranelift/src/base.rs

+1
Original file line numberDiff line numberDiff line change
@@ -819,6 +819,7 @@ fn codegen_stmt<'tcx>(
819819
| StatementKind::Nop
820820
| StatementKind::FakeRead(..)
821821
| StatementKind::Retag { .. }
822+
| StatementKind::PlaceMention(..)
822823
| StatementKind::AscribeUserType(..) => {}
823824

824825
StatementKind::Coverage { .. } => fx.tcx.sess.fatal("-Zcoverage is unimplemented"),

‎compiler/rustc_codegen_cranelift/src/constant.rs

+1
Original file line numberDiff line numberDiff line change
@@ -529,6 +529,7 @@ pub(crate) fn mir_operand_get_const_val<'tcx>(
529529
| StatementKind::StorageDead(_)
530530
| StatementKind::Retag(_, _)
531531
| StatementKind::AscribeUserType(_, _)
532+
| StatementKind::PlaceMention(..)
532533
| StatementKind::Coverage(_)
533534
| StatementKind::ConstEvalCounter
534535
| StatementKind::Nop => {}

‎compiler/rustc_codegen_ssa/src/mir/statement.rs

+1
Original file line numberDiff line numberDiff line change
@@ -92,6 +92,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
9292
| mir::StatementKind::Retag { .. }
9393
| mir::StatementKind::AscribeUserType(..)
9494
| mir::StatementKind::ConstEvalCounter
95+
| mir::StatementKind::PlaceMention(..)
9596
| mir::StatementKind::Nop => {}
9697
}
9798
}

‎compiler/rustc_const_eval/src/interpret/step.rs

+1-1
Original file line numberDiff line numberDiff line change
@@ -114,7 +114,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
114114
Intrinsic(box intrinsic) => self.emulate_nondiverging_intrinsic(intrinsic)?,
115115

116116
// Statements we do not track.
117-
AscribeUserType(..) => {}
117+
PlaceMention(..) | AscribeUserType(..) => {}
118118

119119
// Currently, Miri discards Coverage statements. Coverage statements are only injected
120120
// via an optional compile time MIR pass and have no side effects. Since Coverage

‎compiler/rustc_const_eval/src/transform/check_consts/check.rs

+1
Original file line numberDiff line numberDiff line change
@@ -690,6 +690,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
690690
| StatementKind::StorageLive(_)
691691
| StatementKind::StorageDead(_)
692692
| StatementKind::Retag { .. }
693+
| StatementKind::PlaceMention(..)
693694
| StatementKind::AscribeUserType(..)
694695
| StatementKind::Coverage(..)
695696
| StatementKind::Intrinsic(..)

‎compiler/rustc_const_eval/src/transform/validate.rs

+8
Original file line numberDiff line numberDiff line change
@@ -679,6 +679,14 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
679679
}
680680
}
681681
}
682+
StatementKind::PlaceMention(..) => {
683+
if self.mir_phase >= MirPhase::Runtime(RuntimePhase::Initial) {
684+
self.fail(
685+
location,
686+
"`PlaceMention` should have been removed after drop lowering phase",
687+
);
688+
}
689+
}
682690
StatementKind::AscribeUserType(..) => {
683691
if self.mir_phase >= MirPhase::Runtime(RuntimePhase::Initial) {
684692
self.fail(

‎compiler/rustc_middle/src/mir/mod.rs

+3
Original file line numberDiff line numberDiff line change
@@ -1453,6 +1453,9 @@ impl Debug for Statement<'_> {
14531453
write!(fmt, "discriminant({:?}) = {:?}", place, variant_index)
14541454
}
14551455
Deinit(ref place) => write!(fmt, "Deinit({:?})", place),
1456+
PlaceMention(ref place) => {
1457+
write!(fmt, "PlaceMention({:?})", place)
1458+
}
14561459
AscribeUserType(box (ref place, ref c_ty), ref variance) => {
14571460
write!(fmt, "AscribeUserType({:?}, {:?}, {:?})", place, variance, c_ty)
14581461
}

‎compiler/rustc_middle/src/mir/spanview.rs

+1
Original file line numberDiff line numberDiff line change
@@ -247,6 +247,7 @@ pub fn statement_kind_name(statement: &Statement<'_>) -> &'static str {
247247
StorageLive(..) => "StorageLive",
248248
StorageDead(..) => "StorageDead",
249249
Retag(..) => "Retag",
250+
PlaceMention(..) => "PlaceMention",
250251
AscribeUserType(..) => "AscribeUserType",
251252
Coverage(..) => "Coverage",
252253
Intrinsic(..) => "Intrinsic",

‎compiler/rustc_middle/src/mir/syntax.rs

+9
Original file line numberDiff line numberDiff line change
@@ -325,6 +325,15 @@ pub enum StatementKind<'tcx> {
325325
/// Only `RetagKind::Default` and `RetagKind::FnEntry` are permitted.
326326
Retag(RetagKind, Box<Place<'tcx>>),
327327

328+
/// This statement exists to preserve a trace of a scrutinee matched against a wildcard
329+
/// binding. This is especially useful for `let _ = PLACE;` bindings that desugar to a single
330+
/// `PlaceMention(PLACE)`.
331+
///
332+
/// When executed at runtime this is a nop.
333+
///
334+
/// Disallowed after drop elaboration.
335+
PlaceMention(Box<Place<'tcx>>),
336+
328337
/// Encodes a user's type ascription. These need to be preserved
329338
/// intact so that NLL can respect them. For example:
330339
/// ```ignore (illustrative)

‎compiler/rustc_middle/src/mir/visit.rs

+9
Original file line numberDiff line numberDiff line change
@@ -405,6 +405,13 @@ macro_rules! make_mir_visitor {
405405
StatementKind::Retag(kind, place) => {
406406
self.visit_retag($(& $mutability)? *kind, place, location);
407407
}
408+
StatementKind::PlaceMention(place) => {
409+
self.visit_place(
410+
place,
411+
PlaceContext::NonUse(NonUseContext::PlaceMention),
412+
location
413+
);
414+
}
408415
StatementKind::AscribeUserType(
409416
box (place, user_ty),
410417
variance
@@ -1288,6 +1295,8 @@ pub enum NonUseContext {
12881295
AscribeUserTy,
12891296
/// The data of a user variable, for debug info.
12901297
VarDebugInfo,
1298+
/// PlaceMention statement.
1299+
PlaceMention,
12911300
}
12921301

12931302
#[derive(Copy, Clone, Debug, PartialEq, Eq)]

‎compiler/rustc_mir_build/src/build/cfg.rs

+11
Original file line numberDiff line numberDiff line change
@@ -90,6 +90,17 @@ impl<'tcx> CFG<'tcx> {
9090
self.push(block, stmt);
9191
}
9292

93+
pub(crate) fn push_place_mention(
94+
&mut self,
95+
block: BasicBlock,
96+
source_info: SourceInfo,
97+
place: Place<'tcx>,
98+
) {
99+
let kind = StatementKind::PlaceMention(Box::new(place));
100+
let stmt = Statement { source_info, kind };
101+
self.push(block, stmt);
102+
}
103+
93104
pub(crate) fn terminate(
94105
&mut self,
95106
block: BasicBlock,

‎compiler/rustc_mir_build/src/build/matches/mod.rs

+7
Original file line numberDiff line numberDiff line change
@@ -556,6 +556,12 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
556556

557557
_ => {
558558
let place_builder = unpack!(block = self.as_place_builder(block, initializer));
559+
560+
if let Some(place) = place_builder.try_to_place(self) {
561+
let source_info = self.source_info(initializer.span);
562+
self.cfg.push_place_mention(block, source_info, place);
563+
}
564+
559565
self.place_into_pattern(block, &irrefutable_pat, place_builder, true)
560566
}
561567
}
@@ -576,6 +582,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
576582
false,
577583
&mut [&mut candidate],
578584
);
585+
579586
// For matches and function arguments, the place that is being matched
580587
// can be set when creating the variables. But the place for
581588
// let PATTERN = ... might not even exist until we do the assignment.

‎compiler/rustc_mir_dataflow/src/impls/liveness.rs

+1
Original file line numberDiff line numberDiff line change
@@ -263,6 +263,7 @@ impl<'a, 'tcx> Analysis<'tcx> for MaybeTransitiveLiveLocals<'a> {
263263
| StatementKind::StorageDead(_)
264264
| StatementKind::Retag(..)
265265
| StatementKind::AscribeUserType(..)
266+
| StatementKind::PlaceMention(..)
266267
| StatementKind::Coverage(..)
267268
| StatementKind::Intrinsic(..)
268269
| StatementKind::ConstEvalCounter

‎compiler/rustc_mir_dataflow/src/impls/storage_liveness.rs

+1
Original file line numberDiff line numberDiff line change
@@ -139,6 +139,7 @@ impl<'mir, 'tcx> crate::GenKillAnalysis<'tcx> for MaybeRequiresStorage<'mir, 'tc
139139
// Nothing to do for these. Match exhaustively so this fails to compile when new
140140
// variants are added.
141141
StatementKind::AscribeUserType(..)
142+
| StatementKind::PlaceMention(..)
142143
| StatementKind::Coverage(..)
143144
| StatementKind::FakeRead(..)
144145
| StatementKind::ConstEvalCounter

‎compiler/rustc_mir_dataflow/src/move_paths/builder.rs

+1
Original file line numberDiff line numberDiff line change
@@ -329,6 +329,7 @@ impl<'b, 'a, 'tcx> Gatherer<'b, 'a, 'tcx> {
329329
}
330330
StatementKind::Retag { .. }
331331
| StatementKind::AscribeUserType(..)
332+
| StatementKind::PlaceMention(..)
332333
| StatementKind::Coverage(..)
333334
| StatementKind::Intrinsic(..)
334335
| StatementKind::ConstEvalCounter

‎compiler/rustc_mir_dataflow/src/value_analysis.rs

+1
Original file line numberDiff line numberDiff line change
@@ -86,6 +86,7 @@ pub trait ValueAnalysis<'tcx> {
8686
StatementKind::ConstEvalCounter
8787
| StatementKind::Nop
8888
| StatementKind::FakeRead(..)
89+
| StatementKind::PlaceMention(..)
8990
| StatementKind::Coverage(..)
9091
| StatementKind::AscribeUserType(..) => (),
9192
}

‎compiler/rustc_mir_transform/src/check_unsafety.rs

+1
Original file line numberDiff line numberDiff line change
@@ -101,6 +101,7 @@ impl<'tcx> Visitor<'tcx> for UnsafetyChecker<'_, 'tcx> {
101101
| StatementKind::StorageDead(..)
102102
| StatementKind::Retag { .. }
103103
| StatementKind::AscribeUserType(..)
104+
| StatementKind::PlaceMention(..)
104105
| StatementKind::Coverage(..)
105106
| StatementKind::Intrinsic(..)
106107
| StatementKind::ConstEvalCounter

‎compiler/rustc_mir_transform/src/cleanup_post_borrowck.rs

+1
Original file line numberDiff line numberDiff line change
@@ -24,6 +24,7 @@ impl<'tcx> MirPass<'tcx> for CleanupPostBorrowck {
2424
for statement in basic_block.statements.iter_mut() {
2525
match statement.kind {
2626
StatementKind::AscribeUserType(..)
27+
| StatementKind::PlaceMention(..)
2728
| StatementKind::Assign(box (_, Rvalue::Ref(_, BorrowKind::Shallow, _)))
2829
| StatementKind::FakeRead(..) => statement.make_nop(),
2930
_ => (),

‎compiler/rustc_mir_transform/src/coverage/spans.rs

+1
Original file line numberDiff line numberDiff line change
@@ -832,6 +832,7 @@ pub(super) fn filtered_statement_span(statement: &Statement<'_>) -> Option<Span>
832832
| StatementKind::SetDiscriminant { .. }
833833
| StatementKind::Deinit(..)
834834
| StatementKind::Retag(_, _)
835+
| StatementKind::PlaceMention(..)
835836
| StatementKind::AscribeUserType(_, _) => {
836837
Some(statement.source_info.span)
837838
}

‎compiler/rustc_mir_transform/src/dead_store_elimination.rs

+3-1
Original file line numberDiff line numberDiff line change
@@ -56,7 +56,9 @@ pub fn eliminate<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>, borrowed: &BitS
5656
| StatementKind::ConstEvalCounter
5757
| StatementKind::Nop => (),
5858

59-
StatementKind::FakeRead(_) | StatementKind::AscribeUserType(_, _) => {
59+
StatementKind::FakeRead(_)
60+
| StatementKind::PlaceMention(_)
61+
| StatementKind::AscribeUserType(_, _) => {
6062
bug!("{:?} not found in this MIR phase!", &statement.kind)
6163
}
6264
}

‎compiler/rustc_mir_transform/src/dest_prop.rs

+1
Original file line numberDiff line numberDiff line change
@@ -581,6 +581,7 @@ impl WriteInfo {
581581
| StatementKind::ConstEvalCounter
582582
| StatementKind::Nop
583583
| StatementKind::Coverage(_)
584+
| StatementKind::PlaceMention(_)
584585
| StatementKind::StorageLive(_)
585586
| StatementKind::StorageDead(_) => (),
586587
StatementKind::FakeRead(_) | StatementKind::AscribeUserType(_, _) => {

‎compiler/rustc_mir_transform/src/generator.rs

+1
Original file line numberDiff line numberDiff line change
@@ -1647,6 +1647,7 @@ impl<'tcx> Visitor<'tcx> for EnsureGeneratorFieldAssignmentsNeverAlias<'_> {
16471647
| StatementKind::StorageDead(_)
16481648
| StatementKind::Retag(..)
16491649
| StatementKind::AscribeUserType(..)
1650+
| StatementKind::PlaceMention(..)
16501651
| StatementKind::Coverage(..)
16511652
| StatementKind::Intrinsic(..)
16521653
| StatementKind::ConstEvalCounter

‎compiler/rustc_mir_transform/src/remove_noop_landing_pads.rs

+1
Original file line numberDiff line numberDiff line change
@@ -33,6 +33,7 @@ impl RemoveNoopLandingPads {
3333
StatementKind::FakeRead(..)
3434
| StatementKind::StorageLive(_)
3535
| StatementKind::StorageDead(_)
36+
| StatementKind::PlaceMention(..)
3637
| StatementKind::AscribeUserType(..)
3738
| StatementKind::Coverage(..)
3839
| StatementKind::ConstEvalCounter

‎compiler/rustc_mir_transform/src/separate_const_switch.rs

+2
Original file line numberDiff line numberDiff line change
@@ -245,6 +245,7 @@ fn is_likely_const<'tcx>(mut tracked_place: Place<'tcx>, block: &BasicBlockData<
245245
| StatementKind::StorageLive(_)
246246
| StatementKind::Retag(_, _)
247247
| StatementKind::AscribeUserType(_, _)
248+
| StatementKind::PlaceMention(..)
248249
| StatementKind::Coverage(_)
249250
| StatementKind::StorageDead(_)
250251
| StatementKind::Intrinsic(_)
@@ -315,6 +316,7 @@ fn find_determining_place<'tcx>(
315316
| StatementKind::StorageDead(_)
316317
| StatementKind::Retag(_, _)
317318
| StatementKind::AscribeUserType(_, _)
319+
| StatementKind::PlaceMention(..)
318320
| StatementKind::Coverage(_)
319321
| StatementKind::Intrinsic(_)
320322
| StatementKind::ConstEvalCounter

‎compiler/rustc_mir_transform/src/simplify.rs

+1
Original file line numberDiff line numberDiff line change
@@ -525,6 +525,7 @@ impl<'tcx> Visitor<'tcx> for UsedLocals {
525525
| StatementKind::Retag(..)
526526
| StatementKind::Coverage(..)
527527
| StatementKind::FakeRead(..)
528+
| StatementKind::PlaceMention(..)
528529
| StatementKind::AscribeUserType(..) => {
529530
self.super_statement(statement, location);
530531
}

‎src/tools/clippy/clippy_utils/src/qualify_min_const_fn.rs

+1
Original file line numberDiff line numberDiff line change
@@ -241,6 +241,7 @@ fn check_statement<'tcx>(
241241
| StatementKind::StorageDead(_)
242242
| StatementKind::Retag { .. }
243243
| StatementKind::AscribeUserType(..)
244+
| StatementKind::PlaceMention(..)
244245
| StatementKind::Coverage(..)
245246
| StatementKind::ConstEvalCounter
246247
| StatementKind::Nop => Ok(()),

‎tests/mir-opt/building/match_false_edges.full_tested_match.built.after.mir

+1
Original file line numberDiff line numberDiff line change
@@ -100,6 +100,7 @@ fn full_tested_match() -> () {
100100
}
101101

102102
bb11: {
103+
PlaceMention(_1); // scope 0 at $DIR/match_false_edges.rs:+1:13: +5:6
103104
StorageDead(_2); // scope 0 at $DIR/match_false_edges.rs:+5:6: +5:7
104105
StorageDead(_1); // scope 0 at $DIR/match_false_edges.rs:+5:6: +5:7
105106
_0 = const (); // scope 0 at $DIR/match_false_edges.rs:+0:28: +6:2

‎tests/mir-opt/building/match_false_edges.full_tested_match2.built.after.mir

+1
Original file line numberDiff line numberDiff line change
@@ -100,6 +100,7 @@ fn full_tested_match2() -> () {
100100
}
101101

102102
bb11: {
103+
PlaceMention(_1); // scope 0 at $DIR/match_false_edges.rs:+1:13: +5:6
103104
StorageDead(_2); // scope 0 at $DIR/match_false_edges.rs:+5:6: +5:7
104105
StorageDead(_1); // scope 0 at $DIR/match_false_edges.rs:+5:6: +5:7
105106
_0 = const (); // scope 0 at $DIR/match_false_edges.rs:+0:29: +6:2

‎tests/mir-opt/building/match_false_edges.main.built.after.mir

+1
Original file line numberDiff line numberDiff line change
@@ -162,6 +162,7 @@ fn main() -> () {
162162
}
163163

164164
bb19: {
165+
PlaceMention(_1); // scope 0 at $DIR/match_false_edges.rs:+1:13: +6:6
165166
StorageDead(_2); // scope 0 at $DIR/match_false_edges.rs:+6:6: +6:7
166167
StorageDead(_1); // scope 0 at $DIR/match_false_edges.rs:+6:6: +6:7
167168
_0 = const (); // scope 0 at $DIR/match_false_edges.rs:+0:11: +7:2

‎tests/mir-opt/building/uniform_array_move_out.move_out_by_subslice.built.after.mir

+1
Original file line numberDiff line numberDiff line change
@@ -77,6 +77,7 @@ fn move_out_by_subslice() -> () {
7777
bb6: {
7878
StorageDead(_2); // scope 0 at $DIR/uniform_array_move_out.rs:+1:26: +1:27
7979
FakeRead(ForLet(None), _1); // scope 0 at $DIR/uniform_array_move_out.rs:+1:9: +1:10
80+
PlaceMention(_1); // scope 1 at $DIR/uniform_array_move_out.rs:+2:21: +2:22
8081
StorageLive(_12); // scope 1 at $DIR/uniform_array_move_out.rs:+2:10: +2:12
8182
_12 = move _1[0..2]; // scope 1 at $DIR/uniform_array_move_out.rs:+2:10: +2:12
8283
_0 = const (); // scope 0 at $DIR/uniform_array_move_out.rs:+0:27: +3:2

‎tests/mir-opt/building/uniform_array_move_out.move_out_from_end.built.after.mir

+1
Original file line numberDiff line numberDiff line change
@@ -77,6 +77,7 @@ fn move_out_from_end() -> () {
7777
bb6: {
7878
StorageDead(_2); // scope 0 at $DIR/uniform_array_move_out.rs:+1:26: +1:27
7979
FakeRead(ForLet(None), _1); // scope 0 at $DIR/uniform_array_move_out.rs:+1:9: +1:10
80+
PlaceMention(_1); // scope 1 at $DIR/uniform_array_move_out.rs:+2:20: +2:21
8081
StorageLive(_12); // scope 1 at $DIR/uniform_array_move_out.rs:+2:14: +2:16
8182
_12 = move _1[1 of 2]; // scope 1 at $DIR/uniform_array_move_out.rs:+2:14: +2:16
8283
_0 = const (); // scope 0 at $DIR/uniform_array_move_out.rs:+0:24: +3:2

‎tests/mir-opt/issue_72181.main.built.after.mir

+2
Original file line numberDiff line numberDiff line change
@@ -29,6 +29,7 @@ fn main() -> () {
2929
}
3030

3131
bb1: {
32+
PlaceMention(_1); // scope 0 at $DIR/issue_72181.rs:+1:13: +1:34
3233
StorageDead(_1); // scope 0 at $DIR/issue_72181.rs:+1:34: +1:35
3334
StorageLive(_2); // scope 1 at $DIR/issue_72181.rs:+3:9: +3:10
3435
StorageLive(_3); // scope 1 at $DIR/issue_72181.rs:+3:14: +3:27
@@ -49,6 +50,7 @@ fn main() -> () {
4950

5051
bb2: {
5152
_5 = (_2[_6].0: u64); // scope 4 at $DIR/issue_72181.rs:+4:22: +4:28
53+
PlaceMention(_5); // scope 2 at $DIR/issue_72181.rs:+4:13: +4:30
5254
StorageDead(_6); // scope 2 at $DIR/issue_72181.rs:+4:30: +4:31
5355
StorageDead(_5); // scope 2 at $DIR/issue_72181.rs:+4:30: +4:31
5456
_0 = const (); // scope 0 at $DIR/issue_72181.rs:+0:11: +5:2

‎tests/mir-opt/issue_91633.bar.built.after.mir

+1
Original file line numberDiff line numberDiff line change
@@ -20,6 +20,7 @@ fn bar(_1: Box<[T]>) -> () {
2020

2121
bb1: {
2222
StorageDead(_3); // scope 0 at $DIR/issue_91633.rs:+4:18: +4:19
23+
PlaceMention((*_2)); // scope 0 at $DIR/issue_91633.rs:+4:14: +4:19
2324
StorageDead(_2); // scope 0 at $DIR/issue_91633.rs:+4:19: +4:20
2425
_0 = const (); // scope 0 at $DIR/issue_91633.rs:+3:2: +5:3
2526
drop(_1) -> [return: bb2, unwind: bb4]; // scope 0 at $DIR/issue_91633.rs:+5:2: +5:3

0 commit comments

Comments
 (0)