Struct rustc_mir::transform::const_prop::ConstPropagator

struct ConstPropagator<'b, 'a, 'tcx: 'a + 'b> {
    ecx: EvalContext<'a, 'b, 'tcx, CompileTimeEvaluator>,
    mir: &'b Mir<'tcx>,
    tcx: TyCtxt<'a, 'tcx, 'tcx>,
    source: MirSource,
    places: IndexVec<Local, Option<(Value, TyLayout<'tcx>, Span)>>,
    can_const_prop: IndexVec<Local, bool>,
    param_env: ParamEnv<'tcx>,
}

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Finds optimization opportunities on the MIR.

Fields

ecx: EvalContext<'a, 'b, 'tcx, CompileTimeEvaluator>

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mir: &'b Mir<'tcx>

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tcx: TyCtxt<'a, 'tcx, 'tcx>

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source: MirSource

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places: IndexVec<Local, Option<(Value, TyLayout<'tcx>, Span)>>

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can_const_prop: IndexVec<Local, bool>

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param_env: ParamEnv<'tcx>

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Methods

impl<'b, 'a, 'tcx: 'b> ConstPropagator<'b, 'a, 'tcx>

fn new(     mir: &'b Mir<'tcx>,     tcx: TyCtxt<'a, 'tcx, 'tcx>,     source: MirSource ) -> ConstPropagator<'b, 'a, 'tcx>

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fn use_ecx<F, T>(&mut self, source_info: SourceInfo, f: F) -> Option<T> where     F: FnOnce(&mut Self) -> EvalResult<'tcx, T>,

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fn eval_constant(     &mut self,     c: &Constant<'tcx>,     source_info: SourceInfo ) -> Option<(Value, TyLayout<'tcx>, Span)>

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fn eval_place(     &mut self,     place: &Place<'tcx>,     source_info: SourceInfo ) -> Option<(Value, TyLayout<'tcx>, Span)>

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fn eval_operand(     &mut self,     op: &Operand<'tcx>,     source_info: SourceInfo ) -> Option<(Value, TyLayout<'tcx>, Span)>

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fn const_prop(     &mut self,     rvalue: &Rvalue<'tcx>,     place_layout: TyLayout<'tcx>,     source_info: SourceInfo ) -> Option<(Value, TyLayout<'tcx>, Span)>

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Trait Implementations

impl<'a, 'b, 'tcx> LayoutOf for &'a ConstPropagator<'a, 'b, 'tcx>

type Ty = Ty<'tcx>

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type TyLayout = Result<TyLayout<'tcx>, LayoutError<'tcx>>

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fn layout_of(self, ty: Ty<'tcx>) -> Self::TyLayout

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impl<'a, 'b, 'tcx> HasDataLayout for &'a ConstPropagator<'a, 'b, 'tcx>

fn data_layout(&self) -> &TargetDataLayout

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impl<'a, 'b, 'tcx> HasTyCtxt<'tcx> for &'a ConstPropagator<'a, 'b, 'tcx>

fn tcx<'c>(&'c self) -> TyCtxt<'c, 'tcx, 'tcx>

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impl<'b, 'a, 'tcx> Visitor<'tcx> for ConstPropagator<'b, 'a, 'tcx>

fn visit_constant(&mut self, constant: &Constant<'tcx>, location: Location)

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fn visit_statement(     &mut self,     block: BasicBlock,     statement: &Statement<'tcx>,     location: Location )

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fn visit_terminator_kind(     &mut self,     block: BasicBlock,     kind: &TerminatorKind<'tcx>,     location: Location )

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fn visit_mir(&mut self, mir: &Mir<'tcx>)

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fn visit_basic_block_data(     &mut self,     block: BasicBlock,     data: &BasicBlockData<'tcx> )

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fn visit_source_scope_data(&mut self, scope_data: &SourceScopeData)

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fn visit_assign(     &mut self,     block: BasicBlock,     place: &Place<'tcx>,     rvalue: &Rvalue<'tcx>,     location: Location )

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fn visit_terminator(     &mut self,     block: BasicBlock,     terminator: &Terminator<'tcx>,     location: Location )

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fn visit_assert_message(     &mut self,     msg: &EvalErrorKind<'tcx, Operand<'tcx>>,     location: Location )

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fn visit_rvalue(&mut self, rvalue: &Rvalue<'tcx>, location: Location)

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fn visit_operand(&mut self, operand: &Operand<'tcx>, location: Location)

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fn visit_user_assert_ty(     &mut self,     c_ty: &Canonical<'tcx, &'tcx TyS<'tcx>>,     local: &Local,     location: Location )

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fn visit_place(     &mut self,     place: &Place<'tcx>,     context: PlaceContext<'tcx>,     location: Location )

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fn visit_static(     &mut self,     static_: &Static<'tcx>,     context: PlaceContext<'tcx>,     location: Location )

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fn visit_projection(     &mut self,     place: &Projection<'tcx, Place<'tcx>, Local, &'tcx TyS<'tcx>>,     context: PlaceContext<'tcx>,     location: Location )

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fn visit_projection_elem(     &mut self,     place: &ProjectionElem<'tcx, Local, &'tcx TyS<'tcx>>,     context: PlaceContext<'tcx>,     location: Location )

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fn visit_branch(&mut self, source: BasicBlock, target: BasicBlock)

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fn visit_def_id(&mut self, def_id: &DefId, Location)

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fn visit_span(&mut self, span: &Span)

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fn visit_source_info(&mut self, source_info: &SourceInfo)

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fn visit_ty(&mut self, ty: &&'tcx TyS<'tcx>, TyContext)

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fn visit_region(&mut self, region: &&'tcx RegionKind, Location)

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fn visit_const(&mut self, constant: &&'tcx Const<'tcx>, Location)

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fn visit_substs(&mut self, substs: &&'tcx Slice<Kind<'tcx>>, Location)

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fn visit_closure_substs(&mut self, substs: &ClosureSubsts<'tcx>, Location)

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fn visit_generator_substs(&mut self, substs: &GeneratorSubsts<'tcx>, Location)

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fn visit_local_decl(&mut self, local: Local, local_decl: &LocalDecl<'tcx>)

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fn visit_local(     &mut self,     _local: &Local,     _context: PlaceContext<'tcx>,     _location: Location )

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fn visit_source_scope(&mut self, scope: &SourceScope)

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fn super_mir(&mut self, mir: &Mir<'tcx>)

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fn super_basic_block_data(     &mut self,     block: BasicBlock,     data: &BasicBlockData<'tcx> )

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fn super_source_scope_data(&mut self, scope_data: &SourceScopeData)

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fn super_statement(     &mut self,     block: BasicBlock,     statement: &Statement<'tcx>,     location: Location )

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fn super_assign(     &mut self,     _block: BasicBlock,     place: &Place<'tcx>,     rvalue: &Rvalue<'tcx>,     location: Location )

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fn super_terminator(     &mut self,     block: BasicBlock,     terminator: &Terminator<'tcx>,     location: Location )

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fn super_terminator_kind(     &mut self,     block: BasicBlock,     kind: &TerminatorKind<'tcx>,     source_location: Location )

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fn super_assert_message(     &mut self,     msg: &EvalErrorKind<'tcx, Operand<'tcx>>,     location: Location )

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fn super_rvalue(&mut self, rvalue: &Rvalue<'tcx>, location: Location)

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fn super_operand(&mut self, operand: &Operand<'tcx>, location: Location)

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fn super_user_assert_ty(     &mut self,     _c_ty: &Canonical<'tcx, &'tcx TyS<'tcx>>,     local: &Local,     location: Location )

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fn super_place(     &mut self,     place: &Place<'tcx>,     context: PlaceContext<'tcx>,     location: Location )

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fn super_static(     &mut self,     static_: &Static<'tcx>,     _context: PlaceContext<'tcx>,     location: Location )

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fn super_projection(     &mut self,     proj: &Projection<'tcx, Place<'tcx>, Local, &'tcx TyS<'tcx>>,     context: PlaceContext<'tcx>,     location: Location )

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fn super_projection_elem(     &mut self,     proj: &ProjectionElem<'tcx, Local, &'tcx TyS<'tcx>>,     _context: PlaceContext<'tcx>,     location: Location )

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fn super_local_decl(&mut self, local: Local, local_decl: &LocalDecl<'tcx>)

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fn super_source_scope(&mut self, _scope: &SourceScope)

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fn super_branch(&mut self, _source: BasicBlock, _target: BasicBlock)

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fn super_constant(&mut self, constant: &Constant<'tcx>, location: Location)

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fn super_def_id(&mut self, _def_id: &DefId)

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fn super_span(&mut self, _span: &Span)

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fn super_source_info(&mut self, source_info: &SourceInfo)

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fn super_ty(&mut self, _ty: &&'tcx TyS<'tcx>)

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fn super_region(&mut self, _region: &&'tcx RegionKind)

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fn super_const(&mut self, _const: &&'tcx Const<'tcx>)

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fn super_substs(&mut self, _substs: &&'tcx Slice<Kind<'tcx>>)

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fn super_generator_substs(&mut self, _substs: &GeneratorSubsts<'tcx>)

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fn super_closure_substs(&mut self, _substs: &ClosureSubsts<'tcx>)

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fn visit_location(&mut self, mir: &Mir<'tcx>, location: Location)

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