diff options
Diffstat (limited to 'compiler/rustc_mir_transform/src/simplify.rs')
-rw-r--r-- | compiler/rustc_mir_transform/src/simplify.rs | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/compiler/rustc_mir_transform/src/simplify.rs b/compiler/rustc_mir_transform/src/simplify.rs index 475e2ec9a..8f6abe7a9 100644 --- a/compiler/rustc_mir_transform/src/simplify.rs +++ b/compiler/rustc_mir_transform/src/simplify.rs @@ -35,7 +35,6 @@ use rustc_middle::mir::visit::{MutVisitor, MutatingUseContext, PlaceContext, Vis use rustc_middle::mir::*; use rustc_middle::ty::TyCtxt; use smallvec::SmallVec; -use std::convert::TryInto; pub struct SimplifyCfg { label: String, @@ -380,9 +379,21 @@ fn save_unreachable_coverage( )); } -pub struct SimplifyLocals; +pub struct SimplifyLocals { + label: String, +} + +impl SimplifyLocals { + pub fn new(label: &str) -> SimplifyLocals { + SimplifyLocals { label: format!("SimplifyLocals-{}", label) } + } +} impl<'tcx> MirPass<'tcx> for SimplifyLocals { + fn name(&self) -> &str { + &self.label + } + fn is_enabled(&self, sess: &rustc_session::Session) -> bool { sess.mir_opt_level() > 0 } @@ -558,6 +569,7 @@ fn remove_unused_definitions(used_locals: &mut UsedLocals, body: &mut Body<'_>) StatementKind::SetDiscriminant { ref place, .. } | StatementKind::Deinit(ref place) => used_locals.is_used(place.local), + StatementKind::Nop => false, _ => true, }; |