Struct rustc_mir_transform::dataflow_const_prop::Patch

pub(crate) struct Patch<'tcx> {
    tcx: TyCtxt<'tcx>,
    pub(crate) before_effect: FxHashMap<(Location, Place<'tcx>), Const<'tcx>>,
    pub(crate) assignments: FxHashMap<Location, Const<'tcx>>,
}

Fields

tcx: TyCtxt<'tcx>

before_effect: FxHashMap<(Location, Place<'tcx>), Const<'tcx>>

For a given MIR location, this stores the values of the operands used by that location. In particular, this is before the effect, such that the operands of _1 = _1 + _2 are properly captured. (This may become UB soon, but it is currently emitted even by safe code.)

assignments: FxHashMap<Location, Const<'tcx>>

Stores the assigned values for assignments where the Rvalue is constant.

Implementations

impl<'tcx> Patch<'tcx>

pub(crate) fn new(tcx: TyCtxt<'tcx>) -> Self

fn make_operand(&self, const_: Const<'tcx>) -> Operand<'tcx>

Trait Implementations

impl<'tcx> MutVisitor<'tcx> for Patch<'tcx>

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

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

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

fn process_projection_elem( &mut self, elem: PlaceElem<'tcx>, location: Location, ) -> Option<PlaceElem<'tcx>>

fn visit_body(&mut self, body: &mut Body<'tcx>)

fn visit_body_preserves_cfg(&mut self, body: &mut Body<'tcx>)

fn super_body_preserves_cfg(&mut self, body: &mut Body<'tcx>)

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

fn visit_source_scope_data(&mut self, scope_data: &mut SourceScopeData<'tcx>)

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

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

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

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

fn visit_ascribe_user_ty( &mut self, place: &mut Place<'tcx>, variance: &mut Variance, user_ty: &mut UserTypeProjection, location: Location, )

fn visit_coverage(&mut self, kind: &mut CoverageKind, location: Location)

fn visit_retag( &mut self, kind: &mut RetagKind, place: &mut Place<'tcx>, location: Location, )

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

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

fn process_projection<'a>( &mut self, projection: &'a [ProjectionElem<Local, Ty<'tcx>>], location: Location, ) -> Option<Vec<ProjectionElem<Local, Ty<'tcx>>>>

fn visit_const_operand( &mut self, constant: &mut ConstOperand<'tcx>, location: Location, )

This is called for every constant in the MIR body and every required_consts (i.e., including consts that have been dead-code-eliminated).

fn visit_ty_const(&mut self, ct: &mut Const<'tcx>, location: Location)

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

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

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

fn visit_user_type_projection(&mut self, ty: &mut UserTypeProjection)

fn visit_user_type_annotation( &mut self, index: UserTypeAnnotationIndex, ty: &mut CanonicalUserTypeAnnotation<'tcx>, )

fn visit_region(&mut self, region: &mut Region<'tcx>, _: Location)

fn visit_args( &mut self, args: &mut &'tcx RawList<(), GenericArg<'tcx>>, _: Location, )

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

fn visit_var_debug_info(&mut self, var_debug_info: &mut VarDebugInfo<'tcx>)

fn visit_local( &mut self, _local: &mut Local, _context: PlaceContext, _location: Location, )

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

fn super_body(&mut self, body: &mut Body<'tcx>)

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

fn super_source_scope_data(&mut self, scope_data: &mut SourceScopeData<'tcx>)

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

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

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

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

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

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

fn super_ascribe_user_ty( &mut self, place: &mut Place<'tcx>, variance: &mut Variance, user_ty: &mut UserTypeProjection, location: Location, )

fn super_coverage(&mut self, _kind: &mut CoverageKind, _location: Location)

fn super_retag( &mut self, _kind: &mut RetagKind, place: &mut Place<'tcx>, location: Location, )

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

fn super_var_debug_info(&mut self, var_debug_info: &mut VarDebugInfo<'tcx>)

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

fn super_const_operand( &mut self, constant: &mut ConstOperand<'tcx>, location: Location, )

fn super_ty_const(&mut self, _ct: &mut Const<'tcx>, _location: Location)

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

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

fn super_user_type_projection(&mut self, _ty: &mut UserTypeProjection)

fn super_user_type_annotation( &mut self, _index: UserTypeAnnotationIndex, ty: &mut CanonicalUserTypeAnnotation<'tcx>, )

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

fn super_region(&mut self, _region: &mut Region<'tcx>)

fn super_args(&mut self, _args: &mut &'tcx RawList<(), GenericArg<'tcx>>)

fn visit_location(&mut self, body: &mut Body<'tcx>, location: Location)

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 72 bytes