Struct DeduceParamAttrs 

struct DeduceParamAttrs {
    usage: IndexVec<Local, UsageSummary>,
}

A visitor that determines how a return place and arguments are used inside MIR body. To determine whether a local is mutated we can’t use the mutability field on LocalDecl because it has no meaning post-optimization.

Fields

usage: IndexVec<Local, UsageSummary>

Summarizes how a return place and arguments are used inside MIR body.

Implementations

impl DeduceParamAttrs

fn new(body: &Body<'_>) -> Self

Returns a new DeduceParamAttrs instance.

fn as_param(&self, local: Local) -> Option<Local>

Returns whether a local is the return place or an argument and returns its index.

Trait Implementations

impl<'tcx> Visitor<'tcx> for DeduceParamAttrs

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

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

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

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

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

fn visit_statement_debuginfo( &mut self, stmt_debuginfo: &StmtDebugInfo<'tcx>, location: Location, )

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

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

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

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

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

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

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

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

fn visit_projection( &mut self, place_ref: PlaceRef<'tcx>, context: PlaceContext, location: Location, )

fn visit_projection_elem( &mut self, place_ref: PlaceRef<'tcx>, elem: ProjectionElem<Local, Ty<'tcx>>, context: PlaceContext, location: Location, )

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

fn super_projection( &mut self, place_ref: PlaceRef<'tcx>, context: PlaceContext, location: Location, )

fn super_projection_elem( &mut self, _place_ref: PlaceRef<'tcx>, elem: ProjectionElem<Local, Ty<'tcx>>, context: PlaceContext, location: Location, )

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

fn visit_span(&mut self, span: Span)

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

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

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

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

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

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

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

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

fn visit_local( &mut self, local: Local, context: PlaceContext, location: Location, )

fn visit_source_scope(&mut self, scope: SourceScope)

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

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

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

fn super_statement_debuginfo( &mut self, stmt_debuginfo: &StmtDebugInfo<'tcx>, location: Location, )

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

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

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

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

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

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

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

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

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

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

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

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

fn super_source_scope(&mut self, _scope: SourceScope)

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

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

fn super_span(&mut self, _span: Span)

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

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

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

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

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

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

fn visit_location(&mut self, body: &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: 24 bytes