bjoernager/rust
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Introduce a no-op PlaceMention statement for let _ =.

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This commit is contained in:
Camille GILLOT 2022-09-06 18:41:01 +02:00
parent be758ef5ab
commit 4462bb54e3
44 changed files with 139 additions and 20 deletions
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2
compiler/rustc_const_eval/src/interpret/step.rs
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@ -114,7 +114,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
Intrinsic(box intrinsic) => self.emulate_nondiverging_intrinsic(intrinsic)?,
// Statements we do not track.
AscribeUserType(..) => {}
PlaceMention(..) | AscribeUserType(..) => {}
// Currently, Miri discards Coverage statements. Coverage statements are only injected
// via an optional compile time MIR pass and have no side effects. Since Coverage

1
compiler/rustc_const_eval/src/transform/check_consts/check.rs
View file

@ -690,6 +690,7 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
| StatementKind::StorageLive(_)
| StatementKind::StorageDead(_)
| StatementKind::Retag { .. }
| StatementKind::PlaceMention(..)
| StatementKind::AscribeUserType(..)
| StatementKind::Coverage(..)
| StatementKind::Intrinsic(..)

8
compiler/rustc_const_eval/src/transform/validate.rs
View file

@ -679,6 +679,14 @@ impl<'a, 'tcx> Visitor<'tcx> for TypeChecker<'a, 'tcx> {
}
}
}
StatementKind::PlaceMention(..) => {
if self.mir_phase >= MirPhase::Runtime(RuntimePhase::Initial) {
self.fail(
location,
"`PlaceMention` should have been removed after drop lowering phase",
);
}
}
StatementKind::AscribeUserType(..) => {
if self.mir_phase >= MirPhase::Runtime(RuntimePhase::Initial) {
self.fail(