Struct VnState

struct VnState<'body, 'tcx> {
    tcx: TyCtxt<'tcx>,
    ecx: InterpCx<'tcx, DummyMachine>,
    local_decls: &'body LocalDecls<'tcx>,
    locals: IndexVec<Local, Option<VnIndex>>,
    rev_locals: IndexVec<VnIndex, SmallVec<[Local; 1]>>,
    values: FxIndexSet<Value<'tcx>>,
    evaluated: IndexVec<VnIndex, Option<OpTy<'tcx>>>,
    next_opaque: Option<usize>,
    feature_unsized_locals: bool,
    ssa: &'body SsaLocals,
    dominators: Dominators<BasicBlock>,
    reused_locals: BitSet<Local>,
}

Fields

tcx: TyCtxt<'tcx>

ecx: InterpCx<'tcx, DummyMachine>

local_decls: &'body LocalDecls<'tcx>

locals: IndexVec<Local, Option<VnIndex>>

Value stored in each local.

rev_locals: IndexVec<VnIndex, SmallVec<[Local; 1]>>

Locals that are assigned that value.

values: FxIndexSet<Value<'tcx>>

evaluated: IndexVec<VnIndex, Option<OpTy<'tcx>>>

Values evaluated as constants if possible.

next_opaque: Option<usize>

Counter to generate different values. This is an option to stop creating opaques during replacement.

feature_unsized_locals: bool

Cache the value of the unsized_locals features, to avoid fetching it repeatedly in a loop.

ssa: &'body SsaLocals

dominators: Dominators<BasicBlock>

reused_locals: BitSet<Local>

Implementations

impl<'body, 'tcx> VnState<'body, 'tcx>

fn new( tcx: TyCtxt<'tcx>, body: &Body<'tcx>, typing_env: TypingEnv<'tcx>, ssa: &'body SsaLocals, dominators: Dominators<BasicBlock>, local_decls: &'body LocalDecls<'tcx>, ) -> Self

fn typing_env(&self) -> TypingEnv<'tcx>

fn insert(&mut self, value: Value<'tcx>) -> VnIndex

fn new_opaque(&mut self) -> Option<VnIndex>

Create a new Value for which we have no information at all, except that it is distinct from all the others.

fn new_pointer( &mut self, place: Place<'tcx>, kind: AddressKind, ) -> Option<VnIndex>

Create a new Value::Address distinct from all the others.

fn get(&self, index: VnIndex) -> &Value<'tcx>

fn assign(&mut self, local: Local, value: VnIndex)

Record that local is assigned value. local must be SSA.

fn insert_constant(&mut self, value: Const<'tcx>) -> Option<VnIndex>

fn insert_bool(&mut self, flag: bool) -> VnIndex

fn insert_scalar(&mut self, scalar: Scalar, ty: Ty<'tcx>) -> VnIndex

fn insert_tuple(&mut self, values: Vec<VnIndex>) -> VnIndex

fn eval_to_const(&mut self, value: VnIndex) -> Option<OpTy<'tcx>>

fn project( &mut self, place: PlaceRef<'tcx>, value: VnIndex, proj: PlaceElem<'tcx>, ) -> Option<VnIndex>

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

Simplify the projection chain if we know better.

fn simplify_place_value( &mut self, place: &mut Place<'tcx>, location: Location, ) -> Option<VnIndex>

Represent the value which would be read from place, and point place to a preexisting place with the same value (if that already exists).

fn simplify_operand( &mut self, operand: &mut Operand<'tcx>, location: Location, ) -> Option<VnIndex>

fn simplify_rvalue( &mut self, rvalue: &mut Rvalue<'tcx>, location: Location, ) -> Option<VnIndex>

fn simplify_discriminant(&mut self, place: VnIndex) -> Option<VnIndex>

fn try_as_place_elem( &mut self, proj: ProjectionElem<VnIndex, Ty<'tcx>>, loc: Location, ) -> Option<PlaceElem<'tcx>>

fn simplify_aggregate_to_copy( &mut self, rvalue: &mut Rvalue<'tcx>, location: Location, fields: &[VnIndex], variant_index: VariantIdx, ) -> Option<VnIndex>

fn simplify_aggregate( &mut self, rvalue: &mut Rvalue<'tcx>, location: Location, ) -> Option<VnIndex>

fn simplify_unary( &mut self, op: UnOp, arg_op: &mut Operand<'tcx>, location: Location, ) -> Option<VnIndex>

fn simplify_binary( &mut self, op: BinOp, lhs_operand: &mut Operand<'tcx>, rhs_operand: &mut Operand<'tcx>, location: Location, ) -> Option<VnIndex>

fn simplify_binary_inner( &mut self, op: BinOp, lhs_ty: Ty<'tcx>, lhs: VnIndex, rhs: VnIndex, ) -> Option<VnIndex>

fn simplify_cast( &mut self, kind: &mut CastKind, operand: &mut Operand<'tcx>, to: Ty<'tcx>, location: Location, ) -> Option<VnIndex>

fn simplify_len( &mut self, place: &mut Place<'tcx>, location: Location, ) -> Option<VnIndex>

fn pointers_have_same_metadata( &self, left_ptr_ty: Ty<'tcx>, right_ptr_ty: Ty<'tcx>, ) -> bool

impl<'tcx> VnState<'_, 'tcx>

fn try_as_operand( &mut self, index: VnIndex, location: Location, ) -> Option<Operand<'tcx>>

If either Self::try_as_constant as Self::try_as_local succeeds, returns that result as an Operand.

fn try_as_constant(&mut self, index: VnIndex) -> Option<ConstOperand<'tcx>>

If index is a Value::Constant, return the Constant to be put in the MIR.

fn try_as_local(&mut self, index: VnIndex, loc: Location) -> Option<Local>

If there is a local which is assigned index, and its assignment strictly dominates loc, return it. If you used this local, add it to reused_locals to remove storage statements.

Trait Implementations

impl<'tcx> MutVisitor<'tcx> for VnState<'_, 'tcx>

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

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

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

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

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 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 process_projection_elem( &mut self, elem: ProjectionElem<Local, Ty<'tcx>>, location: Location, ) -> Option<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: 488 bytes