Skip to content

Use the declaration's SourceInfo for FnEntry retags, not the outermost #101111

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Aug 29, 2022
+16 −19
Merged

Use the declaration's SourceInfo for FnEntry retags, not the outermost #101111

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 8 additions & 11 deletions compiler/rustc_mir_transform/src/add_retag.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -66,7 +66,6 @@ impl<'tcx> MirPass<'tcx> for AddRetag {
// We need an `AllCallEdges` pass before we can do any work.
super::add_call_guards::AllCallEdges.run_pass(tcx, body);

let (span, arg_count) = (body.span, body.arg_count);
let basic_blocks = body.basic_blocks.as_mut();
let local_decls = &body.local_decls;
let needs_retag = |place: &Place<'tcx>| {
Expand All @@ -90,20 +89,18 @@ impl<'tcx> MirPass<'tcx> for AddRetag {
// PART 1
// Retag arguments at the beginning of the start block.
{
// FIXME: Consider using just the span covering the function
// argument declaration.
let source_info = SourceInfo::outermost(span);
// Gather all arguments, skip return value.
let places = local_decls
.iter_enumerated()
.skip(1)
.take(arg_count)
.map(|(local, _)| Place::from(local))
.filter(needs_retag);
let places = local_decls.iter_enumerated().skip(1).take(body.arg_count).filter_map(
|(local, decl)| {
let place = Place::from(local);
needs_retag(&place).then_some((place, decl.source_info))
},
);

// Emit their retags.
basic_blocks[START_BLOCK].statements.splice(
0..0,
places.map(|place| Statement {
places.map(|(place, source_info)| Statement {
source_info,
kind: StatementKind::Retag(RetagKind::FnEntry, Box::new(place)),
}),
Expand Down
2 changes: 1 addition & 1 deletion ...test/mir-opt/dead-store-elimination/provenance_soundness.retags.DeadStoreElimination.diff
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
let mut _0: (); // return place in scope 0 at $DIR/provenance_soundness.rs:+0:25: +0:25

bb0: {
Retag([fn entry] _1); // scope 0 at $DIR/provenance_soundness.rs:+0:1: +0:27
Retag([fn entry] _1); // scope 0 at $DIR/provenance_soundness.rs:+0:11: +0:13
_0 = const (); // scope 0 at $DIR/provenance_soundness.rs:+0:25: +0:27
return; // scope 0 at $DIR/provenance_soundness.rs:+0:27: +0:27
}
Expand Down
4 changes: 2 additions & 2 deletions src/test/mir-opt/inline/inline_retag.bar.Inline.after.mir
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -52,8 +52,8 @@ fn bar() -> bool {
Retag(_7); // scope 1 at $DIR/inline-retag.rs:+2:11: +2:14
_6 = &(*_7); // scope 1 at $DIR/inline-retag.rs:+2:11: +2:14
Retag(_6); // scope 1 at $DIR/inline-retag.rs:+2:11: +2:14
Retag(_3); // scope 2 at $DIR/inline-retag.rs:16:1: 18:2
Retag(_6); // scope 2 at $DIR/inline-retag.rs:16:1: 18:2
Retag(_3); // scope 2 at $DIR/inline-retag.rs:16:8: 16:9
Retag(_6); // scope 2 at $DIR/inline-retag.rs:16:17: 16:18
StorageLive(_11); // scope 2 at $DIR/inline-retag.rs:17:5: 17:7
_11 = (*_3); // scope 2 at $DIR/inline-retag.rs:17:5: 17:7
StorageLive(_12); // scope 2 at $DIR/inline-retag.rs:17:11: 17:13
Expand Down
2 changes: 1 addition & 1 deletion src/test/mir-opt/retag.main-{closure#0}.SimplifyCfg-elaborate-drops.after.mir
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ fn main::{closure#0}(_1: &[closure@main::{closure#0}], _2: &i32) -> &i32 {

bb0: {
Retag([fn entry] _1); // scope 0 at $DIR/retag.rs:+0:31: +0:48
Retag([fn entry] _2); // scope 0 at $DIR/retag.rs:+0:31: +0:48
Retag([fn entry] _2); // scope 0 at $DIR/retag.rs:+0:32: +0:33
StorageLive(_3); // scope 0 at $DIR/retag.rs:42:13: 42:15
_3 = _2; // scope 0 at $DIR/retag.rs:42:18: 42:19
Retag(_3); // scope 0 at $DIR/retag.rs:42:18: 42:19
Expand Down
4 changes: 2 additions & 2 deletions src/test/mir-opt/retag.{impl#0}-foo.SimplifyCfg-elaborate-drops.after.mir
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7,8 +7,8 @@ fn <impl at $DIR/retag.rs:12:1: 12:10>::foo(_1: &Test, _2: &mut i32) -> &mut i32
let mut _3: &mut i32; // in scope 0 at $DIR/retag.rs:+1:9: +1:10

bb0: {
Retag([fn entry] _1); // scope 0 at $DIR/retag.rs:+0:5: +2:6
Retag([fn entry] _2); // scope 0 at $DIR/retag.rs:+0:5: +2:6
Retag([fn entry] _1); // scope 0 at $DIR/retag.rs:+0:16: +0:21
Retag([fn entry] _2); // scope 0 at $DIR/retag.rs:+0:23: +0:24
StorageLive(_3); // scope 0 at $DIR/retag.rs:+1:9: +1:10
_3 = &mut (*_2); // scope 0 at $DIR/retag.rs:+1:9: +1:10
Retag(_3); // scope 0 at $DIR/retag.rs:+1:9: +1:10
Expand Down
4 changes: 2 additions & 2 deletions src/test/mir-opt/retag.{impl#0}-foo_shr.SimplifyCfg-elaborate-drops.after.mir
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6,8 +6,8 @@ fn <impl at $DIR/retag.rs:12:1: 12:10>::foo_shr(_1: &Test, _2: &i32) -> &i32 {
let mut _0: &i32; // return place in scope 0 at $DIR/retag.rs:+0:42: +0:49

bb0: {
Retag([fn entry] _1); // scope 0 at $DIR/retag.rs:+0:5: +2:6
Retag([fn entry] _2); // scope 0 at $DIR/retag.rs:+0:5: +2:6
Retag([fn entry] _1); // scope 0 at $DIR/retag.rs:+0:20: +0:25
Retag([fn entry] _2); // scope 0 at $DIR/retag.rs:+0:27: +0:28
_0 = _2; // scope 0 at $DIR/retag.rs:+1:9: +1:10
Retag(_0); // scope 0 at $DIR/retag.rs:+1:9: +1:10
return; // scope 0 at $DIR/retag.rs:+2:6: +2:6
Expand Down