Rollup merge of #138536 - makai410:mut-mir-visitor, r=celinval
stable_mir: Add `MutMirVisitor` Resolves: [rust-lang/project-stable-mir#81](https://github.com/rust-lang/project-stable-mir/issues/81). I am unsure if we should add a `MutableBody` like Kani did. Currently, I use `&mut Body` in `MutMirVisitor::visit_body()`. r? ``````@celinval``````
This commit is contained in:
Matthias Krüger
GitHub
commit
1cb17dd6f2
4 changed files with 541 additions and 366 deletions
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@ -5,4 +5,4 @@ pub mod pretty;
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pub mod visit;
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pub use body::*;
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pub use visit::MirVisitor;
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pub use visit::{MirVisitor, MutMirVisitor};
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@ -77,6 +77,22 @@ impl Body {
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&self.locals[self.arg_count + 1..]
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}
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/// Returns a mutable reference to the local that holds this function's return value.
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pub(crate) fn ret_local_mut(&mut self) -> &mut LocalDecl {
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&mut self.locals[RETURN_LOCAL]
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}
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/// Returns a mutable slice of locals corresponding to this function's arguments.
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pub(crate) fn arg_locals_mut(&mut self) -> &mut [LocalDecl] {
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&mut self.locals[1..][..self.arg_count]
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}
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/// Returns a mutable slice of inner locals for this function.
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/// Inner locals are those that are neither the return local nor the argument locals.
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pub(crate) fn inner_locals_mut(&mut self) -> &mut [LocalDecl] {
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&mut self.locals[self.arg_count + 1..]
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}
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/// Convenience function to get all the locals in this function.
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///
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/// Locals are typically accessed via the more specific methods `ret_local`,
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@ -39,406 +39,486 @@ use crate::mir::*;
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use crate::ty::{GenericArgs, MirConst, Region, Ty, TyConst};
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use crate::{Error, Opaque, Span};
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pub trait MirVisitor {
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fn visit_body(&mut self, body: &Body) {
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self.super_body(body)
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}
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macro_rules! make_mir_visitor {
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($visitor_trait_name:ident, $($mutability:ident)?) => {
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pub trait $visitor_trait_name {
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fn visit_body(&mut self, body: &$($mutability)? Body) {
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self.super_body(body)
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}
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fn visit_basic_block(&mut self, bb: &BasicBlock) {
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self.super_basic_block(bb)
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}
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fn visit_basic_block(&mut self, bb: &$($mutability)? BasicBlock) {
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self.super_basic_block(bb)
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}
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fn visit_ret_decl(&mut self, local: Local, decl: &LocalDecl) {
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self.super_ret_decl(local, decl)
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}
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fn visit_ret_decl(&mut self, local: Local, decl: &$($mutability)? LocalDecl) {
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self.super_ret_decl(local, decl)
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}
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fn visit_arg_decl(&mut self, local: Local, decl: &LocalDecl) {
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self.super_arg_decl(local, decl)
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}
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fn visit_arg_decl(&mut self, local: Local, decl: &$($mutability)? LocalDecl) {
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self.super_arg_decl(local, decl)
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}
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fn visit_local_decl(&mut self, local: Local, decl: &LocalDecl) {
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self.super_local_decl(local, decl)
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}
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fn visit_local_decl(&mut self, local: Local, decl: &$($mutability)? LocalDecl) {
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self.super_local_decl(local, decl)
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}
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fn visit_statement(&mut self, stmt: &Statement, location: Location) {
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self.super_statement(stmt, location)
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}
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fn visit_statement(&mut self, stmt: &$($mutability)? Statement, location: Location) {
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self.super_statement(stmt, location)
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}
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fn visit_terminator(&mut self, term: &Terminator, location: Location) {
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self.super_terminator(term, location)
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}
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fn visit_terminator(&mut self, term: &$($mutability)? Terminator, location: Location) {
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self.super_terminator(term, location)
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}
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fn visit_span(&mut self, span: &Span) {
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self.super_span(span)
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}
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fn visit_span(&mut self, span: &$($mutability)? Span) {
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self.super_span(span)
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}
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fn visit_place(&mut self, place: &Place, ptx: PlaceContext, location: Location) {
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self.super_place(place, ptx, location)
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}
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fn visit_place(&mut self, place: &$($mutability)? Place, ptx: PlaceContext, location: Location) {
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self.super_place(place, ptx, location)
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}
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fn visit_projection_elem(
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&mut self,
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place_ref: PlaceRef<'_>,
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elem: &ProjectionElem,
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ptx: PlaceContext,
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location: Location,
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) {
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let _ = place_ref;
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self.super_projection_elem(elem, ptx, location);
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}
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visit_place_fns!($($mutability)?);
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fn visit_local(&mut self, local: &Local, ptx: PlaceContext, location: Location) {
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let _ = (local, ptx, location);
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}
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fn visit_local(&mut self, local: &$($mutability)? Local, ptx: PlaceContext, location: Location) {
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let _ = (local, ptx, location);
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}
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fn visit_rvalue(&mut self, rvalue: &Rvalue, location: Location) {
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self.super_rvalue(rvalue, location)
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}
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fn visit_rvalue(&mut self, rvalue: &$($mutability)? Rvalue, location: Location) {
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self.super_rvalue(rvalue, location)
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}
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fn visit_operand(&mut self, operand: &Operand, location: Location) {
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self.super_operand(operand, location)
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}
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fn visit_operand(&mut self, operand: &$($mutability)? Operand, location: Location) {
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self.super_operand(operand, location)
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}
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fn visit_user_type_projection(&mut self, projection: &UserTypeProjection) {
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self.super_user_type_projection(projection)
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}
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fn visit_user_type_projection(&mut self, projection: &$($mutability)? UserTypeProjection) {
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self.super_user_type_projection(projection)
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}
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fn visit_ty(&mut self, ty: &Ty, location: Location) {
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let _ = location;
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self.super_ty(ty)
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}
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fn visit_ty(&mut self, ty: &$($mutability)? Ty, location: Location) {
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let _ = location;
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self.super_ty(ty)
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}
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fn visit_const_operand(&mut self, constant: &ConstOperand, location: Location) {
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self.super_const_operand(constant, location)
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}
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fn visit_const_operand(&mut self, constant: &$($mutability)? ConstOperand, location: Location) {
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self.super_const_operand(constant, location)
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}
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fn visit_mir_const(&mut self, constant: &MirConst, location: Location) {
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self.super_mir_const(constant, location)
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}
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fn visit_mir_const(&mut self, constant: &$($mutability)? MirConst, location: Location) {
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self.super_mir_const(constant, location)
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}
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fn visit_ty_const(&mut self, constant: &TyConst, location: Location) {
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let _ = location;
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self.super_ty_const(constant)
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}
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fn visit_ty_const(&mut self, constant: &$($mutability)? TyConst, location: Location) {
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let _ = location;
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self.super_ty_const(constant)
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}
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fn visit_region(&mut self, region: &Region, location: Location) {
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let _ = location;
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self.super_region(region)
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}
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fn visit_region(&mut self, region: &$($mutability)? Region, location: Location) {
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let _ = location;
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self.super_region(region)
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}
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fn visit_args(&mut self, args: &GenericArgs, location: Location) {
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let _ = location;
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self.super_args(args)
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}
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fn visit_args(&mut self, args: &$($mutability)? GenericArgs, location: Location) {
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let _ = location;
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self.super_args(args)
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}
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fn visit_assert_msg(&mut self, msg: &AssertMessage, location: Location) {
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self.super_assert_msg(msg, location)
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}
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fn visit_assert_msg(&mut self, msg: &$($mutability)? AssertMessage, location: Location) {
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self.super_assert_msg(msg, location)
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}
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fn visit_var_debug_info(&mut self, var_debug_info: &VarDebugInfo) {
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self.super_var_debug_info(var_debug_info);
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}
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fn visit_var_debug_info(&mut self, var_debug_info: &$($mutability)? VarDebugInfo) {
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self.super_var_debug_info(var_debug_info);
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}
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fn super_body(&mut self, body: &Body) {
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let Body { blocks, locals: _, arg_count, var_debug_info, spread_arg: _, span } = body;
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fn super_body(&mut self, body: &$($mutability)? Body) {
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super_body!(self, body, $($mutability)?);
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}
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for bb in blocks {
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self.visit_basic_block(bb);
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fn super_basic_block(&mut self, bb: &$($mutability)? BasicBlock) {
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let BasicBlock { statements, terminator } = bb;
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for stmt in statements {
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self.visit_statement(stmt, Location(stmt.span));
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}
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self.visit_terminator(terminator, Location(terminator.span));
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}
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fn super_local_decl(&mut self, local: Local, decl: &$($mutability)? LocalDecl) {
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let _ = local;
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let LocalDecl { ty, span, .. } = decl;
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self.visit_ty(ty, Location(*span));
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}
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fn super_ret_decl(&mut self, local: Local, decl: &$($mutability)? LocalDecl) {
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self.super_local_decl(local, decl)
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}
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fn super_arg_decl(&mut self, local: Local, decl: &$($mutability)? LocalDecl) {
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self.super_local_decl(local, decl)
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}
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fn super_statement(&mut self, stmt: &$($mutability)? Statement, location: Location) {
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let Statement { kind, span } = stmt;
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self.visit_span(span);
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match kind {
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StatementKind::Assign(place, rvalue) => {
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self.visit_place(place, PlaceContext::MUTATING, location);
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self.visit_rvalue(rvalue, location);
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}
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StatementKind::FakeRead(_, place) | StatementKind::PlaceMention(place) => {
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self.visit_place(place, PlaceContext::NON_MUTATING, location);
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}
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StatementKind::SetDiscriminant { place, .. }
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| StatementKind::Deinit(place)
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| StatementKind::Retag(_, place) => {
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self.visit_place(place, PlaceContext::MUTATING, location);
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}
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StatementKind::StorageLive(local) | StatementKind::StorageDead(local) => {
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self.visit_local(local, PlaceContext::NON_USE, location);
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}
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StatementKind::AscribeUserType { place, projections, variance: _ } => {
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self.visit_place(place, PlaceContext::NON_USE, location);
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self.visit_user_type_projection(projections);
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}
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StatementKind::Coverage(coverage) => visit_opaque(coverage),
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StatementKind::Intrinsic(intrisic) => match intrisic {
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NonDivergingIntrinsic::Assume(operand) => {
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self.visit_operand(operand, location);
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}
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NonDivergingIntrinsic::CopyNonOverlapping(CopyNonOverlapping {
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src,
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dst,
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count,
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}) => {
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self.visit_operand(src, location);
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self.visit_operand(dst, location);
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self.visit_operand(count, location);
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}
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},
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StatementKind::ConstEvalCounter | StatementKind::Nop => {}
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}
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}
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fn super_terminator(&mut self, term: &$($mutability)? Terminator, location: Location) {
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let Terminator { kind, span } = term;
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self.visit_span(span);
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match kind {
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TerminatorKind::Goto { .. }
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| TerminatorKind::Resume
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| TerminatorKind::Abort
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| TerminatorKind::Unreachable => {}
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TerminatorKind::Assert { cond, expected: _, msg, target: _, unwind: _ } => {
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self.visit_operand(cond, location);
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self.visit_assert_msg(msg, location);
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}
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TerminatorKind::Drop { place, target: _, unwind: _ } => {
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self.visit_place(place, PlaceContext::MUTATING, location);
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}
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TerminatorKind::Call { func, args, destination, target: _, unwind: _ } => {
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self.visit_operand(func, location);
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for arg in args {
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self.visit_operand(arg, location);
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}
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self.visit_place(destination, PlaceContext::MUTATING, location);
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}
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TerminatorKind::InlineAsm { operands, .. } => {
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for op in operands {
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let InlineAsmOperand { in_value, out_place, raw_rpr: _ } = op;
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if let Some(input) = in_value {
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self.visit_operand(input, location);
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}
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if let Some(output) = out_place {
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self.visit_place(output, PlaceContext::MUTATING, location);
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}
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}
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}
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TerminatorKind::Return => {
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let $($mutability)? local = RETURN_LOCAL;
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self.visit_local(&$($mutability)? local, PlaceContext::NON_MUTATING, location);
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}
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TerminatorKind::SwitchInt { discr, targets: _ } => {
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self.visit_operand(discr, location);
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}
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}
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}
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fn super_span(&mut self, span: &$($mutability)? Span) {
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let _ = span;
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}
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fn super_rvalue(&mut self, rvalue: &$($mutability)? Rvalue, location: Location) {
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match rvalue {
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Rvalue::AddressOf(mutability, place) => {
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let pcx = PlaceContext { is_mut: *mutability == RawPtrKind::Mut };
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self.visit_place(place, pcx, location);
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}
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Rvalue::Aggregate(_, operands) => {
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for op in operands {
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self.visit_operand(op, location);
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}
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}
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Rvalue::BinaryOp(_, lhs, rhs) | Rvalue::CheckedBinaryOp(_, lhs, rhs) => {
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self.visit_operand(lhs, location);
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self.visit_operand(rhs, location);
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}
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Rvalue::Cast(_, op, ty) => {
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self.visit_operand(op, location);
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self.visit_ty(ty, location);
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}
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Rvalue::CopyForDeref(place) | Rvalue::Discriminant(place) | Rvalue::Len(place) => {
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self.visit_place(place, PlaceContext::NON_MUTATING, location);
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}
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Rvalue::Ref(region, kind, place) => {
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self.visit_region(region, location);
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let pcx = PlaceContext { is_mut: matches!(kind, BorrowKind::Mut { .. }) };
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self.visit_place(place, pcx, location);
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}
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Rvalue::Repeat(op, constant) => {
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self.visit_operand(op, location);
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self.visit_ty_const(constant, location);
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}
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Rvalue::ShallowInitBox(op, ty) => {
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self.visit_ty(ty, location);
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self.visit_operand(op, location)
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}
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Rvalue::ThreadLocalRef(_) => {}
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Rvalue::NullaryOp(_, ty) => {
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self.visit_ty(ty, location);
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}
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Rvalue::UnaryOp(_, op) | Rvalue::Use(op) => {
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self.visit_operand(op, location);
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}
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}
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}
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fn super_operand(&mut self, operand: &$($mutability)? Operand, location: Location) {
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match operand {
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Operand::Copy(place) | Operand::Move(place) => {
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self.visit_place(place, PlaceContext::NON_MUTATING, location)
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}
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Operand::Constant(constant) => {
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self.visit_const_operand(constant, location);
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}
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}
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}
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fn super_user_type_projection(&mut self, projection: &$($mutability)? UserTypeProjection) {
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// This is a no-op on mir::Visitor.
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let _ = projection;
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}
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fn super_ty(&mut self, ty: &$($mutability)? Ty) {
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let _ = ty;
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}
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fn super_const_operand(&mut self, constant: &$($mutability)? ConstOperand, location: Location) {
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let ConstOperand { span, user_ty: _, const_ } = constant;
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self.visit_span(span);
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self.visit_mir_const(const_, location);
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}
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fn super_mir_const(&mut self, constant: &$($mutability)? MirConst, location: Location) {
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let MirConst { kind: _, ty, id: _ } = constant;
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self.visit_ty(ty, location);
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}
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fn super_ty_const(&mut self, constant: &$($mutability)? TyConst) {
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let _ = constant;
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}
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fn super_region(&mut self, region: &$($mutability)? Region) {
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let _ = region;
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}
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fn super_args(&mut self, args: &$($mutability)? GenericArgs) {
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let _ = args;
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}
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fn super_var_debug_info(&mut self, var_debug_info: &$($mutability)? VarDebugInfo) {
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let VarDebugInfo { source_info, composite, value, name: _, argument_index: _ } =
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var_debug_info;
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self.visit_span(&$($mutability)? source_info.span);
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let location = Location(source_info.span);
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if let Some(composite) = composite {
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self.visit_ty(&$($mutability)? composite.ty, location);
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}
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match value {
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VarDebugInfoContents::Place(place) => {
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self.visit_place(place, PlaceContext::NON_USE, location);
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}
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VarDebugInfoContents::Const(constant) => {
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self.visit_mir_const(&$($mutability)? constant.const_, location);
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}
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}
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}
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fn super_assert_msg(&mut self, msg: &$($mutability)? AssertMessage, location: Location) {
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match msg {
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AssertMessage::BoundsCheck { len, index } => {
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self.visit_operand(len, location);
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self.visit_operand(index, location);
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}
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AssertMessage::Overflow(_, left, right) => {
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self.visit_operand(left, location);
|
||||
self.visit_operand(right, location);
|
||||
}
|
||||
AssertMessage::OverflowNeg(op)
|
||||
| AssertMessage::DivisionByZero(op)
|
||||
| AssertMessage::RemainderByZero(op) => {
|
||||
self.visit_operand(op, location);
|
||||
}
|
||||
AssertMessage::ResumedAfterReturn(_)
|
||||
| AssertMessage::ResumedAfterPanic(_)
|
||||
| AssertMessage::NullPointerDereference => {
|
||||
//nothing to visit
|
||||
}
|
||||
AssertMessage::MisalignedPointerDereference { required, found } => {
|
||||
self.visit_operand(required, location);
|
||||
self.visit_operand(found, location);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
macro_rules! super_body {
|
||||
($self:ident, $body:ident, mut) => {
|
||||
for bb in $body.blocks.iter_mut() {
|
||||
$self.visit_basic_block(bb);
|
||||
}
|
||||
|
||||
self.visit_ret_decl(RETURN_LOCAL, body.ret_local());
|
||||
$self.visit_ret_decl(RETURN_LOCAL, $body.ret_local_mut());
|
||||
|
||||
for (idx, arg) in body.arg_locals().iter().enumerate() {
|
||||
self.visit_arg_decl(idx + 1, arg)
|
||||
for (idx, arg) in $body.arg_locals_mut().iter_mut().enumerate() {
|
||||
$self.visit_arg_decl(idx + 1, arg)
|
||||
}
|
||||
|
||||
let local_start = $body.arg_count + 1;
|
||||
for (idx, arg) in $body.inner_locals_mut().iter_mut().enumerate() {
|
||||
$self.visit_local_decl(idx + local_start, arg)
|
||||
}
|
||||
|
||||
for info in $body.var_debug_info.iter_mut() {
|
||||
$self.visit_var_debug_info(info);
|
||||
}
|
||||
|
||||
$self.visit_span(&mut $body.span)
|
||||
};
|
||||
|
||||
($self:ident, $body:ident, ) => {
|
||||
let Body { blocks, locals: _, arg_count, var_debug_info, spread_arg: _, span } = $body;
|
||||
|
||||
for bb in blocks {
|
||||
$self.visit_basic_block(bb);
|
||||
}
|
||||
|
||||
$self.visit_ret_decl(RETURN_LOCAL, $body.ret_local());
|
||||
|
||||
for (idx, arg) in $body.arg_locals().iter().enumerate() {
|
||||
$self.visit_arg_decl(idx + 1, arg)
|
||||
}
|
||||
|
||||
let local_start = arg_count + 1;
|
||||
for (idx, arg) in body.inner_locals().iter().enumerate() {
|
||||
self.visit_local_decl(idx + local_start, arg)
|
||||
for (idx, arg) in $body.inner_locals().iter().enumerate() {
|
||||
$self.visit_local_decl(idx + local_start, arg)
|
||||
}
|
||||
|
||||
for info in var_debug_info.iter() {
|
||||
self.visit_var_debug_info(info);
|
||||
$self.visit_var_debug_info(info);
|
||||
}
|
||||
|
||||
self.visit_span(span)
|
||||
}
|
||||
|
||||
fn super_basic_block(&mut self, bb: &BasicBlock) {
|
||||
let BasicBlock { statements, terminator } = bb;
|
||||
for stmt in statements {
|
||||
self.visit_statement(stmt, Location(stmt.span));
|
||||
}
|
||||
self.visit_terminator(terminator, Location(terminator.span));
|
||||
}
|
||||
|
||||
fn super_local_decl(&mut self, local: Local, decl: &LocalDecl) {
|
||||
let _ = local;
|
||||
let LocalDecl { ty, span, .. } = decl;
|
||||
self.visit_ty(ty, Location(*span));
|
||||
}
|
||||
|
||||
fn super_ret_decl(&mut self, local: Local, decl: &LocalDecl) {
|
||||
self.super_local_decl(local, decl)
|
||||
}
|
||||
|
||||
fn super_arg_decl(&mut self, local: Local, decl: &LocalDecl) {
|
||||
self.super_local_decl(local, decl)
|
||||
}
|
||||
|
||||
fn super_statement(&mut self, stmt: &Statement, location: Location) {
|
||||
let Statement { kind, span } = stmt;
|
||||
self.visit_span(span);
|
||||
match kind {
|
||||
StatementKind::Assign(place, rvalue) => {
|
||||
self.visit_place(place, PlaceContext::MUTATING, location);
|
||||
self.visit_rvalue(rvalue, location);
|
||||
}
|
||||
StatementKind::FakeRead(_, place) | StatementKind::PlaceMention(place) => {
|
||||
self.visit_place(place, PlaceContext::NON_MUTATING, location);
|
||||
}
|
||||
StatementKind::SetDiscriminant { place, .. }
|
||||
| StatementKind::Deinit(place)
|
||||
| StatementKind::Retag(_, place) => {
|
||||
self.visit_place(place, PlaceContext::MUTATING, location);
|
||||
}
|
||||
StatementKind::StorageLive(local) | StatementKind::StorageDead(local) => {
|
||||
self.visit_local(local, PlaceContext::NON_USE, location);
|
||||
}
|
||||
StatementKind::AscribeUserType { place, projections, variance: _ } => {
|
||||
self.visit_place(place, PlaceContext::NON_USE, location);
|
||||
self.visit_user_type_projection(projections);
|
||||
}
|
||||
StatementKind::Coverage(coverage) => visit_opaque(coverage),
|
||||
StatementKind::Intrinsic(intrisic) => match intrisic {
|
||||
NonDivergingIntrinsic::Assume(operand) => {
|
||||
self.visit_operand(operand, location);
|
||||
}
|
||||
NonDivergingIntrinsic::CopyNonOverlapping(CopyNonOverlapping {
|
||||
src,
|
||||
dst,
|
||||
count,
|
||||
}) => {
|
||||
self.visit_operand(src, location);
|
||||
self.visit_operand(dst, location);
|
||||
self.visit_operand(count, location);
|
||||
}
|
||||
},
|
||||
StatementKind::ConstEvalCounter | StatementKind::Nop => {}
|
||||
}
|
||||
}
|
||||
|
||||
fn super_terminator(&mut self, term: &Terminator, location: Location) {
|
||||
let Terminator { kind, span } = term;
|
||||
self.visit_span(span);
|
||||
match kind {
|
||||
TerminatorKind::Goto { .. }
|
||||
| TerminatorKind::Resume
|
||||
| TerminatorKind::Abort
|
||||
| TerminatorKind::Unreachable => {}
|
||||
TerminatorKind::Assert { cond, expected: _, msg, target: _, unwind: _ } => {
|
||||
self.visit_operand(cond, location);
|
||||
self.visit_assert_msg(msg, location);
|
||||
}
|
||||
TerminatorKind::Drop { place, target: _, unwind: _ } => {
|
||||
self.visit_place(place, PlaceContext::MUTATING, location);
|
||||
}
|
||||
TerminatorKind::Call { func, args, destination, target: _, unwind: _ } => {
|
||||
self.visit_operand(func, location);
|
||||
for arg in args {
|
||||
self.visit_operand(arg, location);
|
||||
}
|
||||
self.visit_place(destination, PlaceContext::MUTATING, location);
|
||||
}
|
||||
TerminatorKind::InlineAsm { operands, .. } => {
|
||||
for op in operands {
|
||||
let InlineAsmOperand { in_value, out_place, raw_rpr: _ } = op;
|
||||
if let Some(input) = in_value {
|
||||
self.visit_operand(input, location);
|
||||
}
|
||||
if let Some(output) = out_place {
|
||||
self.visit_place(output, PlaceContext::MUTATING, location);
|
||||
}
|
||||
}
|
||||
}
|
||||
TerminatorKind::Return => {
|
||||
let local = RETURN_LOCAL;
|
||||
self.visit_local(&local, PlaceContext::NON_MUTATING, location);
|
||||
}
|
||||
TerminatorKind::SwitchInt { discr, targets: _ } => {
|
||||
self.visit_operand(discr, location);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn super_span(&mut self, span: &Span) {
|
||||
let _ = span;
|
||||
}
|
||||
|
||||
fn super_place(&mut self, place: &Place, ptx: PlaceContext, location: Location) {
|
||||
let _ = location;
|
||||
let _ = ptx;
|
||||
self.visit_local(&place.local, ptx, location);
|
||||
|
||||
for (idx, elem) in place.projection.iter().enumerate() {
|
||||
let place_ref = PlaceRef { local: place.local, projection: &place.projection[..idx] };
|
||||
self.visit_projection_elem(place_ref, elem, ptx, location);
|
||||
}
|
||||
}
|
||||
|
||||
fn super_projection_elem(
|
||||
&mut self,
|
||||
elem: &ProjectionElem,
|
||||
ptx: PlaceContext,
|
||||
location: Location,
|
||||
) {
|
||||
match elem {
|
||||
ProjectionElem::Downcast(_idx) => {}
|
||||
ProjectionElem::ConstantIndex { offset: _, min_length: _, from_end: _ }
|
||||
| ProjectionElem::Deref
|
||||
| ProjectionElem::Subslice { from: _, to: _, from_end: _ } => {}
|
||||
ProjectionElem::Field(_idx, ty) => self.visit_ty(ty, location),
|
||||
ProjectionElem::Index(local) => self.visit_local(local, ptx, location),
|
||||
ProjectionElem::OpaqueCast(ty) | ProjectionElem::Subtype(ty) => {
|
||||
self.visit_ty(ty, location)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn super_rvalue(&mut self, rvalue: &Rvalue, location: Location) {
|
||||
match rvalue {
|
||||
Rvalue::AddressOf(mutability, place) => {
|
||||
let pcx = PlaceContext { is_mut: *mutability == RawPtrKind::Mut };
|
||||
self.visit_place(place, pcx, location);
|
||||
}
|
||||
Rvalue::Aggregate(_, operands) => {
|
||||
for op in operands {
|
||||
self.visit_operand(op, location);
|
||||
}
|
||||
}
|
||||
Rvalue::BinaryOp(_, lhs, rhs) | Rvalue::CheckedBinaryOp(_, lhs, rhs) => {
|
||||
self.visit_operand(lhs, location);
|
||||
self.visit_operand(rhs, location);
|
||||
}
|
||||
Rvalue::Cast(_, op, ty) => {
|
||||
self.visit_operand(op, location);
|
||||
self.visit_ty(ty, location);
|
||||
}
|
||||
Rvalue::CopyForDeref(place) | Rvalue::Discriminant(place) | Rvalue::Len(place) => {
|
||||
self.visit_place(place, PlaceContext::NON_MUTATING, location);
|
||||
}
|
||||
Rvalue::Ref(region, kind, place) => {
|
||||
self.visit_region(region, location);
|
||||
let pcx = PlaceContext { is_mut: matches!(kind, BorrowKind::Mut { .. }) };
|
||||
self.visit_place(place, pcx, location);
|
||||
}
|
||||
Rvalue::Repeat(op, constant) => {
|
||||
self.visit_operand(op, location);
|
||||
self.visit_ty_const(constant, location);
|
||||
}
|
||||
Rvalue::ShallowInitBox(op, ty) => {
|
||||
self.visit_ty(ty, location);
|
||||
self.visit_operand(op, location)
|
||||
}
|
||||
Rvalue::ThreadLocalRef(_) => {}
|
||||
Rvalue::NullaryOp(_, ty) => {
|
||||
self.visit_ty(ty, location);
|
||||
}
|
||||
Rvalue::UnaryOp(_, op) | Rvalue::Use(op) => {
|
||||
self.visit_operand(op, location);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn super_operand(&mut self, operand: &Operand, location: Location) {
|
||||
match operand {
|
||||
Operand::Copy(place) | Operand::Move(place) => {
|
||||
self.visit_place(place, PlaceContext::NON_MUTATING, location)
|
||||
}
|
||||
Operand::Constant(constant) => {
|
||||
self.visit_const_operand(constant, location);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn super_user_type_projection(&mut self, projection: &UserTypeProjection) {
|
||||
// This is a no-op on mir::Visitor.
|
||||
let _ = projection;
|
||||
}
|
||||
|
||||
fn super_ty(&mut self, ty: &Ty) {
|
||||
let _ = ty;
|
||||
}
|
||||
|
||||
fn super_const_operand(&mut self, constant: &ConstOperand, location: Location) {
|
||||
let ConstOperand { span, user_ty: _, const_ } = constant;
|
||||
self.visit_span(span);
|
||||
self.visit_mir_const(const_, location);
|
||||
}
|
||||
|
||||
fn super_mir_const(&mut self, constant: &MirConst, location: Location) {
|
||||
let MirConst { kind: _, ty, id: _ } = constant;
|
||||
self.visit_ty(ty, location);
|
||||
}
|
||||
|
||||
fn super_ty_const(&mut self, constant: &TyConst) {
|
||||
let _ = constant;
|
||||
}
|
||||
|
||||
fn super_region(&mut self, region: &Region) {
|
||||
let _ = region;
|
||||
}
|
||||
|
||||
fn super_args(&mut self, args: &GenericArgs) {
|
||||
let _ = args;
|
||||
}
|
||||
|
||||
fn super_var_debug_info(&mut self, var_debug_info: &VarDebugInfo) {
|
||||
let VarDebugInfo { source_info, composite, value, name: _, argument_index: _ } =
|
||||
var_debug_info;
|
||||
self.visit_span(&source_info.span);
|
||||
let location = Location(source_info.span);
|
||||
if let Some(composite) = composite {
|
||||
self.visit_ty(&composite.ty, location);
|
||||
}
|
||||
match value {
|
||||
VarDebugInfoContents::Place(place) => {
|
||||
self.visit_place(place, PlaceContext::NON_USE, location);
|
||||
}
|
||||
VarDebugInfoContents::Const(constant) => {
|
||||
self.visit_mir_const(&constant.const_, location);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fn super_assert_msg(&mut self, msg: &AssertMessage, location: Location) {
|
||||
match msg {
|
||||
AssertMessage::BoundsCheck { len, index } => {
|
||||
self.visit_operand(len, location);
|
||||
self.visit_operand(index, location);
|
||||
}
|
||||
AssertMessage::Overflow(_, left, right) => {
|
||||
self.visit_operand(left, location);
|
||||
self.visit_operand(right, location);
|
||||
}
|
||||
AssertMessage::OverflowNeg(op)
|
||||
| AssertMessage::DivisionByZero(op)
|
||||
| AssertMessage::RemainderByZero(op) => {
|
||||
self.visit_operand(op, location);
|
||||
}
|
||||
AssertMessage::ResumedAfterReturn(_)
|
||||
| AssertMessage::ResumedAfterPanic(_)
|
||||
| AssertMessage::NullPointerDereference => {
|
||||
//nothing to visit
|
||||
}
|
||||
AssertMessage::MisalignedPointerDereference { required, found } => {
|
||||
self.visit_operand(required, location);
|
||||
self.visit_operand(found, location);
|
||||
}
|
||||
}
|
||||
}
|
||||
$self.visit_span(span)
|
||||
};
|
||||
}
|
||||
|
||||
macro_rules! visit_place_fns {
|
||||
(mut) => {
|
||||
fn super_place(&mut self, place: &mut Place, ptx: PlaceContext, location: Location) {
|
||||
self.visit_local(&mut place.local, ptx, location);
|
||||
|
||||
for elem in place.projection.iter_mut() {
|
||||
self.visit_projection_elem(elem, ptx, location);
|
||||
}
|
||||
}
|
||||
|
||||
// We don't have to replicate the `process_projection()` like we did in
|
||||
// `rustc_middle::mir::visit.rs` here because the `projection` field in `Place`
|
||||
// of Stable-MIR is not an immutable borrow, unlike in `Place` of MIR.
|
||||
fn visit_projection_elem(
|
||||
&mut self,
|
||||
elem: &mut ProjectionElem,
|
||||
ptx: PlaceContext,
|
||||
location: Location,
|
||||
) {
|
||||
self.super_projection_elem(elem, ptx, location)
|
||||
}
|
||||
|
||||
fn super_projection_elem(
|
||||
&mut self,
|
||||
elem: &mut ProjectionElem,
|
||||
ptx: PlaceContext,
|
||||
location: Location,
|
||||
) {
|
||||
match elem {
|
||||
ProjectionElem::Deref => {}
|
||||
ProjectionElem::Field(_idx, ty) => self.visit_ty(ty, location),
|
||||
ProjectionElem::Index(local) => self.visit_local(local, ptx, location),
|
||||
ProjectionElem::ConstantIndex { offset: _, min_length: _, from_end: _ } => {}
|
||||
ProjectionElem::Subslice { from: _, to: _, from_end: _ } => {}
|
||||
ProjectionElem::Downcast(_idx) => {}
|
||||
ProjectionElem::OpaqueCast(ty) => self.visit_ty(ty, location),
|
||||
ProjectionElem::Subtype(ty) => self.visit_ty(ty, location),
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
() => {
|
||||
fn super_place(&mut self, place: &Place, ptx: PlaceContext, location: Location) {
|
||||
self.visit_local(&place.local, ptx, location);
|
||||
|
||||
for (idx, elem) in place.projection.iter().enumerate() {
|
||||
let place_ref =
|
||||
PlaceRef { local: place.local, projection: &place.projection[..idx] };
|
||||
self.visit_projection_elem(place_ref, elem, ptx, location);
|
||||
}
|
||||
}
|
||||
|
||||
fn visit_projection_elem<'a>(
|
||||
&mut self,
|
||||
place_ref: PlaceRef<'a>,
|
||||
elem: &ProjectionElem,
|
||||
ptx: PlaceContext,
|
||||
location: Location,
|
||||
) {
|
||||
let _ = place_ref;
|
||||
self.super_projection_elem(elem, ptx, location);
|
||||
}
|
||||
|
||||
fn super_projection_elem(
|
||||
&mut self,
|
||||
elem: &ProjectionElem,
|
||||
ptx: PlaceContext,
|
||||
location: Location,
|
||||
) {
|
||||
match elem {
|
||||
ProjectionElem::Deref => {}
|
||||
ProjectionElem::Field(_idx, ty) => self.visit_ty(ty, location),
|
||||
ProjectionElem::Index(local) => self.visit_local(local, ptx, location),
|
||||
ProjectionElem::ConstantIndex { offset: _, min_length: _, from_end: _ } => {}
|
||||
ProjectionElem::Subslice { from: _, to: _, from_end: _ } => {}
|
||||
ProjectionElem::Downcast(_idx) => {}
|
||||
ProjectionElem::OpaqueCast(ty) => self.visit_ty(ty, location),
|
||||
ProjectionElem::Subtype(ty) => self.visit_ty(ty, location),
|
||||
}
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
make_mir_visitor!(MirVisitor,);
|
||||
make_mir_visitor!(MutMirVisitor, mut);
|
||||
|
||||
/// This function is a no-op that gets used to ensure this visitor is kept up-to-date.
|
||||
///
|
||||
/// The idea is that whenever we replace an Opaque type by a real type, the compiler will fail
|
||||
|
|
|
|||
|
|
@ -18,6 +18,7 @@ extern crate stable_mir;
|
|||
|
||||
use rustc_smir::rustc_internal;
|
||||
use stable_mir::mir::MirVisitor;
|
||||
use stable_mir::mir::MutMirVisitor;
|
||||
use stable_mir::*;
|
||||
use std::collections::HashSet;
|
||||
use std::io::Write;
|
||||
|
|
@ -99,6 +100,83 @@ impl<'a> mir::MirVisitor for TestVisitor<'a> {
|
|||
}
|
||||
}
|
||||
|
||||
fn test_mut_visitor() -> ControlFlow<()> {
|
||||
let main_fn = stable_mir::entry_fn();
|
||||
let mut main_body = main_fn.unwrap().expect_body();
|
||||
let locals = main_body.locals().to_vec();
|
||||
let mut main_visitor = TestMutVisitor::collect(locals);
|
||||
main_visitor.visit_body(&mut main_body);
|
||||
assert!(main_visitor.ret_val.is_some());
|
||||
assert!(main_visitor.args.is_empty());
|
||||
assert!(main_visitor.tys.contains(&main_visitor.ret_val.unwrap().ty));
|
||||
assert!(!main_visitor.calls.is_empty());
|
||||
|
||||
let exit_fn = main_visitor.calls.last().unwrap();
|
||||
assert!(exit_fn.mangled_name().contains("exit_fn"), "Unexpected last function: {exit_fn:?}");
|
||||
|
||||
let mut exit_body = exit_fn.body().unwrap();
|
||||
let locals = exit_body.locals().to_vec();
|
||||
let mut exit_visitor = TestMutVisitor::collect(locals);
|
||||
exit_visitor.visit_body(&mut exit_body);
|
||||
assert!(exit_visitor.ret_val.is_some());
|
||||
assert_eq!(exit_visitor.args.len(), 1);
|
||||
assert!(exit_visitor.tys.contains(&exit_visitor.ret_val.unwrap().ty));
|
||||
assert!(exit_visitor.tys.contains(&exit_visitor.args[0].ty));
|
||||
ControlFlow::Continue(())
|
||||
}
|
||||
|
||||
struct TestMutVisitor {
|
||||
locals: Vec<mir::LocalDecl>,
|
||||
pub tys: HashSet<ty::Ty>,
|
||||
pub ret_val: Option<mir::LocalDecl>,
|
||||
pub args: Vec<mir::LocalDecl>,
|
||||
pub calls: Vec<mir::mono::Instance>,
|
||||
}
|
||||
|
||||
impl TestMutVisitor {
|
||||
fn collect(locals: Vec<mir::LocalDecl>) -> TestMutVisitor {
|
||||
let visitor = TestMutVisitor {
|
||||
locals: locals,
|
||||
tys: Default::default(),
|
||||
ret_val: None,
|
||||
args: vec![],
|
||||
calls: vec![],
|
||||
};
|
||||
visitor
|
||||
}
|
||||
}
|
||||
|
||||
impl mir::MutMirVisitor for TestMutVisitor {
|
||||
fn visit_ty(&mut self, ty: &mut ty::Ty, _location: mir::visit::Location) {
|
||||
self.tys.insert(*ty);
|
||||
self.super_ty(ty)
|
||||
}
|
||||
|
||||
fn visit_ret_decl(&mut self, local: mir::Local, decl: &mut mir::LocalDecl) {
|
||||
assert!(local == mir::RETURN_LOCAL);
|
||||
assert!(self.ret_val.is_none());
|
||||
self.ret_val = Some(decl.clone());
|
||||
self.super_ret_decl(local, decl);
|
||||
}
|
||||
|
||||
fn visit_arg_decl(&mut self, local: mir::Local, decl: &mut mir::LocalDecl) {
|
||||
self.args.push(decl.clone());
|
||||
assert_eq!(local, self.args.len());
|
||||
self.super_arg_decl(local, decl);
|
||||
}
|
||||
|
||||
fn visit_terminator(&mut self, term: &mut mir::Terminator, location: mir::visit::Location) {
|
||||
if let mir::TerminatorKind::Call { func, .. } = &mut term.kind {
|
||||
let ty::TyKind::RigidTy(ty) = func.ty(&self.locals).unwrap().kind() else {
|
||||
unreachable!()
|
||||
};
|
||||
let ty::RigidTy::FnDef(def, args) = ty else { unreachable!() };
|
||||
self.calls.push(mir::mono::Instance::resolve(def, &args).unwrap());
|
||||
}
|
||||
self.super_terminator(term, location);
|
||||
}
|
||||
}
|
||||
|
||||
/// This test will generate and analyze a dummy crate using the stable mir.
|
||||
/// For that, it will first write the dummy crate into a file.
|
||||
/// Then it will create a `StableMir` using custom arguments and then
|
||||
|
|
@ -113,7 +191,8 @@ fn main() {
|
|||
CRATE_NAME.to_string(),
|
||||
path.to_string(),
|
||||
];
|
||||
run!(args, test_visitor).unwrap();
|
||||
run!(args.clone(), test_visitor).unwrap();
|
||||
run!(args, test_mut_visitor).unwrap();
|
||||
}
|
||||
|
||||
fn generate_input(path: &str) -> std::io::Result<()> {
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue