44 lines
1.2 KiB
Rust
44 lines
1.2 KiB
Rust
//! This pass removes the unwind branch of all the terminators when the no-landing-pads option is
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//! specified.
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use crate::transform::{MirPass, MirSource};
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use rustc_middle::mir::visit::MutVisitor;
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use rustc_middle::mir::*;
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use rustc_middle::ty::TyCtxt;
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use rustc_target::spec::PanicStrategy;
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pub struct NoLandingPads<'tcx> {
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tcx: TyCtxt<'tcx>,
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}
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impl<'tcx> NoLandingPads<'tcx> {
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pub fn new(tcx: TyCtxt<'tcx>) -> Self {
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NoLandingPads { tcx }
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}
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}
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impl<'tcx> MirPass<'tcx> for NoLandingPads<'tcx> {
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fn run_pass(&self, tcx: TyCtxt<'tcx>, _: MirSource<'tcx>, body: &mut Body<'tcx>) {
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no_landing_pads(tcx, body)
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}
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}
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pub fn no_landing_pads<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
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if tcx.sess.panic_strategy() == PanicStrategy::Abort {
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NoLandingPads::new(tcx).visit_body(body);
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}
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}
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impl<'tcx> MutVisitor<'tcx> for NoLandingPads<'tcx> {
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fn tcx(&self) -> TyCtxt<'tcx> {
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self.tcx
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}
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fn visit_terminator(&mut self, terminator: &mut Terminator<'tcx>, location: Location) {
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if let Some(unwind) = terminator.kind.unwind_mut() {
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unwind.take();
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}
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self.super_terminator(terminator, location);
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}
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}
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