bjoernager/rust
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Add UnwindAction::Unreachable

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This also makes eval machine's `StackPopUnwind`
redundant so that is replaced.
This commit is contained in:
Gary Guo 2022-10-10 19:50:49 +01:00
parent daeb844e0c
commit 5e6ed132fa
23 changed files with 160 additions and 149 deletions
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11
compiler/rustc_middle/src/mir/syntax.rs
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@ -753,12 +753,17 @@ pub enum TerminatorKind<'tcx> {
}
/// Action to be taken when a stack unwind happens.
#[derive(Copy, Clone, Debug, PartialEq, TyEncodable, TyDecodable, Hash, HashStable)]
#[derive(Copy, Clone, Debug, PartialEq, Eq, TyEncodable, TyDecodable, Hash, HashStable)]
#[derive(TypeFoldable, TypeVisitable)]
pub enum UnwindAction {
// No action is to be taken. Continue unwinding.
/// No action is to be taken. Continue unwinding.
///
/// This is similar to `Cleanup(bb)` where `bb` does nothing but `Resume`, but they are not
/// equivalent, as presence of `Cleanup(_)` will make a frame non-POF.
Continue,
// Cleanups to be done.
/// Triggers undefined behavior if unwind happens.
Unreachable,
/// Cleanups to be done.
Cleanup(BasicBlock),
}