+use rustc_middle::mir::{Body, TerminatorKind};
+use rustc_middle::ty::TyCtxt;
+
+use crate::MirPass;
+
+/// Removes `FalseEdge` and `FalseUnwind` terminators from the MIR.
+///
+/// These are only needed for borrow checking, and can be removed afterwards.
+///
+/// FIXME: This should probably have its own MIR phase.
+pub struct RemoveFalseEdges;
+
+impl<'tcx> MirPass<'tcx> for RemoveFalseEdges {
+ fn run_pass(&self, _: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
+ for block in body.basic_blocks_mut() {
+ let terminator = block.terminator_mut();
+ terminator.kind = match terminator.kind {
+ TerminatorKind::FalseEdge { real_target, .. } => {
+ TerminatorKind::Goto { target: real_target }
+ }
+ TerminatorKind::FalseUnwind { real_target, .. } => {
+ TerminatorKind::Goto { target: real_target }
+ }
+
+ _ => continue,
+ }
+ }
+ }
+}