bjoernager/rust
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Add initial AST and MIR support for unwinding from inline assembly

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This commit is contained in:
Amanieu d'Antras 2021-08-30 01:23:33 +01:00 • committed by cynecx
parent 532d2b14c0
commit 940b2eabad
39 changed files with 355 additions and 212 deletions
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22
compiler/rustc_mir_dataflow/src/impls/liveness.rs
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@ -2,7 +2,7 @@ use rustc_index::bit_set::BitSet;
use rustc_middle::mir::visit::{MutatingUseContext, NonMutatingUseContext, PlaceContext, Visitor};
use rustc_middle::mir::{self, Local, Location};
use crate::{AnalysisDomain, Backward, GenKill, GenKillAnalysis};
use crate::{AnalysisDomain, Backward, CallReturnPlaces, GenKill, GenKillAnalysis};
/// A [live-variable dataflow analysis][liveness].
///
@ -94,13 +94,13 @@ impl GenKillAnalysis<'tcx> for MaybeLiveLocals {
&self,
trans: &mut impl GenKill<Self::Idx>,
_block: mir::BasicBlock,
_func: &mir::Operand<'tcx>,
_args: &[mir::Operand<'tcx>],
dest_place: mir::Place<'tcx>,
return_places: CallReturnPlaces<'_, 'tcx>,
) {
if let Some(local) = dest_place.as_local() {
trans.kill(local);
}
return_places.for_each(|place| {
if let Some(local) = place.as_local() {
trans.kill(local);
}
});
}
fn yield_resume_effect(
@ -167,12 +167,16 @@ impl DefUse {
// destination place for a `Call` return or `Yield` resume respectively. Since this is
// only a `Def` when the function returns successfully, we handle this case separately
// in `call_return_effect` above.
PlaceContext::MutatingUse(MutatingUseContext::Call | MutatingUseContext::Yield) => None,
PlaceContext::MutatingUse(
MutatingUseContext::Call
| MutatingUseContext::AsmOutput
| MutatingUseContext::Yield,
) => None,
// All other contexts are uses...
PlaceContext::MutatingUse(
MutatingUseContext::AddressOf
| MutatingUseContext::AsmOutput
| MutatingUseContext::LlvmAsmOutput
| MutatingUseContext::Borrow
| MutatingUseContext::Drop
| MutatingUseContext::Retag,