diff options
| -rw-r--r-- | compiler/rustc_mir/src/transform/remove_noop_landing_pads.rs | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/compiler/rustc_mir/src/transform/remove_noop_landing_pads.rs b/compiler/rustc_mir/src/transform/remove_noop_landing_pads.rs index 0bad1e5037a..4079f0110e2 100644 --- a/compiler/rustc_mir/src/transform/remove_noop_landing_pads.rs +++ b/compiler/rustc_mir/src/transform/remove_noop_landing_pads.rs @@ -102,6 +102,16 @@ impl RemoveNoopLandingPads { let postorder: Vec<_> = traversal::postorder(body).map(|(bb, _)| bb).collect(); for bb in postorder { debug!(" processing {:?}", bb); + if let Some(unwind) = body[bb].terminator_mut().unwind_mut() { + if let Some(unwind_bb) = *unwind { + if nop_landing_pads.contains(unwind_bb) { + debug!(" removing noop landing pad"); + landing_pads_removed += 1; + *unwind = None; + } + } + } + for target in body[bb].terminator_mut().successors_mut() { if *target != resume_block && nop_landing_pads.contains(*target) { debug!(" folding noop jump to {:?} to resume block", target); @@ -110,15 +120,6 @@ impl RemoveNoopLandingPads { } } - if let Some(unwind) = body[bb].terminator_mut().unwind_mut() { - if *unwind == Some(resume_block) { - debug!(" removing noop landing pad"); - jumps_folded -= 1; - landing_pads_removed += 1; - *unwind = None; - } - } - let is_nop_landing_pad = self.is_nop_landing_pad(bb, body, &nop_landing_pads); if is_nop_landing_pad { nop_landing_pads.insert(bb); |