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kill temp early

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This commit is contained in:
ouz-a 2022-04-05 22:38:03 +03:00
parent 72070d8103
commit 1cf6d6940c
3 changed files with 4 additions and 5 deletions
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3
compiler/rustc_mir_transform/src/deref_separator.rs
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@ -8,7 +8,6 @@ pub fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
let mut patch = MirPatch::new(body);
let (basic_blocks, local_decl) = body.basic_blocks_and_local_decls_mut();
for (block, data) in basic_blocks.iter_enumerated_mut() {
let statement_len = data.statements.len();
for (i, stmt) in data.statements.iter_mut().enumerate() {
match stmt.kind {
StatementKind::Assign(box (og_place, Rvalue::Ref(region, borrow_knd, place))) => {
@ -49,7 +48,7 @@ pub fn deref_finder<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
*stmt = new_stmt;
// Since our job with the temp is done it should be gone
let loc = Location { block: block, statement_index: statement_len };
let loc = Location { block: block, statement_index: i + 1 };
patch.add_statement(loc, StatementKind::StorageDead(temp));
// As all projections are off the base projection, if there are

4
src/test/mir-opt/derefer_test.main.Derefer.diff
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@ -38,18 +38,18 @@
+ StorageLive(_6); // scope 2 at $DIR/derefer_test.rs:5:13: 5:26
+ _6 = move (_2.1: &mut (i32, i32)); // scope 2 at $DIR/derefer_test.rs:5:13: 5:26
+ _4 = &mut ((*_6).0: i32); // scope 2 at $DIR/derefer_test.rs:5:13: 5:26
+ StorageDead(_6); // scope 3 at $DIR/derefer_test.rs:6:9: 6:10
StorageLive(_5); // scope 3 at $DIR/derefer_test.rs:6:9: 6:10
- _5 = &mut ((*(_2.1: &mut (i32, i32))).1: i32); // scope 3 at $DIR/derefer_test.rs:6:13: 6:26
+ StorageLive(_7); // scope 3 at $DIR/derefer_test.rs:6:13: 6:26
+ _7 = move (_2.1: &mut (i32, i32)); // scope 3 at $DIR/derefer_test.rs:6:13: 6:26
+ _5 = &mut ((*_7).1: i32); // scope 3 at $DIR/derefer_test.rs:6:13: 6:26
+ StorageDead(_7); // scope 0 at $DIR/derefer_test.rs:2:11: 7:2
_0 = const (); // scope 0 at $DIR/derefer_test.rs:2:11: 7:2
StorageDead(_5); // scope 3 at $DIR/derefer_test.rs:7:1: 7:2
StorageDead(_4); // scope 2 at $DIR/derefer_test.rs:7:1: 7:2
StorageDead(_2); // scope 1 at $DIR/derefer_test.rs:7:1: 7:2
StorageDead(_1); // scope 0 at $DIR/derefer_test.rs:7:1: 7:2
+ StorageDead(_6); // scope 0 at $DIR/derefer_test.rs:7:2: 7:2
+ StorageDead(_7); // scope 0 at $DIR/derefer_test.rs:7:2: 7:2
return; // scope 0 at $DIR/derefer_test.rs:7:2: 7:2
+ }
+

2
src/test/mir-opt/inline/issue_58867_inline_as_ref_as_mut.b.Inline.after.mir
View File

@ -23,11 +23,11 @@ fn b(_1: &mut Box<T>) -> &mut T {
StorageLive(_7); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
_7 = move (*_4); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
_6 = &mut (*_7); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
StorageDead(_7); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
_5 = &mut (*_6); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
_3 = &mut (*_5); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
StorageDead(_6); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
StorageDead(_5); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
StorageDead(_7); // scope 1 at $SRC_DIR/alloc/src/boxed.rs:LL:COL
_2 = &mut (*_3); // scope 0 at $DIR/issue-58867-inline-as-ref-as-mut.rs:8:5: 8:15
StorageDead(_4); // scope 0 at $DIR/issue-58867-inline-as-ref-as-mut.rs:8:14: 8:15
_0 = &mut (*_2); // scope 0 at $DIR/issue-58867-inline-as-ref-as-mut.rs:8:5: 8:15