1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
use rustc::ty::TyCtxt;
use rustc::mir::*;
use rustc::mir::visit::MutVisitor;
use rustc::mir::transform::{Pass, MirPass, MirSource};
pub struct NoLandingPads;
impl<'tcx> MutVisitor<'tcx> for NoLandingPads {
fn visit_terminator(&mut self,
bb: BasicBlock,
terminator: &mut Terminator<'tcx>,
location: Location) {
match terminator.kind {
TerminatorKind::Goto { .. } |
TerminatorKind::Resume |
TerminatorKind::Return |
TerminatorKind::Unreachable |
TerminatorKind::SwitchInt { .. } => {
},
TerminatorKind::Call { cleanup: ref mut unwind, .. } |
TerminatorKind::Assert { cleanup: ref mut unwind, .. } |
TerminatorKind::DropAndReplace { ref mut unwind, .. } |
TerminatorKind::Drop { ref mut unwind, .. } => {
unwind.take();
},
}
self.super_terminator(bb, terminator, location);
}
}
impl<'tcx> MirPass<'tcx> for NoLandingPads {
fn run_pass<'a>(&mut self, tcx: TyCtxt<'a, 'tcx, 'tcx>,
_: MirSource, mir: &mut Mir<'tcx>) {
if tcx.sess.no_landing_pads() {
self.visit_mir(mir);
}
}
}
impl Pass for NoLandingPads {}