Struct rustc_mir_transform::gvn::VnState

struct VnState<'body, 'tcx> {
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>,
    local_decls: &'body LocalDecls<'tcx>,
    locals: IndexVec<Local, Option<VnIndex>>,
    rev_locals: FxHashMap<VnIndex, Vec<Local>>,
    values: FxIndexSet<Value<'tcx>>,
    next_opaque: Option<usize>,
    ssa: &'body SsaLocals,
    dominators: &'body Dominators<BasicBlock>,
    reused_locals: BitSet<Local>,
    any_replacement: bool,
}

Fields

tcx: TyCtxt<'tcx>

param_env: ParamEnv<'tcx>

local_decls: &'body LocalDecls<'tcx>

locals: IndexVec<Local, Option<VnIndex>>

Value stored in each local.

rev_locals: FxHashMap<VnIndex, Vec<Local>>

First local to be assigned that value.

values: FxIndexSet<Value<'tcx>>

next_opaque: Option<usize>

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

ssa: &'body SsaLocals

dominators: &'body Dominators<BasicBlock>

reused_locals: BitSet<Local>

any_replacement: bool

Implementations

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

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

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>) -> 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 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>

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

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.

Trait Implementations

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

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

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, coverage: &mut Coverage, 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>>, Global>>

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

fn visit_constant( &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 List<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, _coverage: &mut Coverage, _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_constant( &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 List<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: 216 bytes