bjoernager/rust
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has_deref: simpler comparison, ty fix

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ouz-a 2022-05-16 16:36:33 +03:00
parent c3e1e7a947
commit 447aaceed7
2 changed files with 7 additions and 19 deletions
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14
compiler/rustc_mir_transform/src/add_retag.rs
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@ -15,13 +15,9 @@ pub struct AddRetag;
/// (Concurrent accesses by other threads are no problem as these are anyway non-atomic
/// copies. Data races are UB.)
fn is_stable(place: PlaceRef<'_>) -> bool {
if place.has_deref() {
// Which place this evaluates to can change with any memory write,
// so cannot assume deref to be stable.
return false;
} else {
return true;
}
// Which place this evaluates to can change with any memory write,
// so cannot assume deref to be stable.
!place.has_deref()
}
/// Determine whether this type may contain a reference (or box), and thus needs retagging.
@ -82,8 +78,8 @@ impl<'tcx> MirPass<'tcx> for AddRetag {
};
let place_base_raw = |place: &Place<'tcx>| {
// If this is a `Deref`, get the type of what we are deref'ing.
if place.ret_deref().is_some() {
let ty = place.ty(local_decls, tcx).ty;
if place.has_deref() {
let ty = &local_decls[place.local].ty;
ty.is_unsafe_ptr()
} else {
// Not a deref, and thus not raw.