diff options
Diffstat (limited to 'compiler/rustc_hir_typeck/src/writeback.rs')
| -rw-r--r-- | compiler/rustc_hir_typeck/src/writeback.rs | 119 |
1 files changed, 55 insertions, 64 deletions
diff --git a/compiler/rustc_hir_typeck/src/writeback.rs b/compiler/rustc_hir_typeck/src/writeback.rs index 0f21fc1e6..106457536 100644 --- a/compiler/rustc_hir_typeck/src/writeback.rs +++ b/compiler/rustc_hir_typeck/src/writeback.rs @@ -11,10 +11,9 @@ use rustc_hir::intravisit::{self, Visitor}; use rustc_infer::infer::error_reporting::TypeAnnotationNeeded::E0282; use rustc_middle::hir::place::Place as HirPlace; use rustc_middle::mir::FakeReadCause; -use rustc_middle::ty::adjustment::{Adjust, Adjustment, PointerCast}; +use rustc_middle::ty::adjustment::{Adjust, Adjustment, PointerCoercion}; use rustc_middle::ty::fold::{TypeFoldable, TypeFolder, TypeSuperFoldable}; use rustc_middle::ty::visit::{TypeSuperVisitable, TypeVisitable, TypeVisitableExt}; -use rustc_middle::ty::TypeckResults; use rustc_middle::ty::{self, ClosureSizeProfileData, Ty, TyCtxt}; use rustc_span::symbol::sym; use rustc_span::Span; @@ -137,7 +136,10 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> { fn write_ty_to_typeck_results(&mut self, hir_id: hir::HirId, ty: Ty<'tcx>) { debug!("write_ty_to_typeck_results({:?}, {:?})", hir_id, ty); - assert!(!ty.has_infer() && !ty.has_placeholders() && !ty.has_free_regions()); + assert!( + !ty.has_infer() && !ty.has_placeholders() && !ty.has_free_regions(), + "{ty} can't be put into typeck results" + ); self.typeck_results.node_types_mut().insert(hir_id, ty); } @@ -148,31 +150,25 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> { fn fix_scalar_builtin_expr(&mut self, e: &hir::Expr<'_>) { match e.kind { hir::ExprKind::Unary(hir::UnOp::Neg | hir::UnOp::Not, inner) => { - let inner_ty = self.fcx.node_ty(inner.hir_id); - let inner_ty = self.fcx.resolve_vars_if_possible(inner_ty); + let inner_ty = self.typeck_results.node_type(inner.hir_id); if inner_ty.is_scalar() { - let mut typeck_results = self.fcx.typeck_results.borrow_mut(); - typeck_results.type_dependent_defs_mut().remove(e.hir_id); - typeck_results.node_substs_mut().remove(e.hir_id); + self.typeck_results.type_dependent_defs_mut().remove(e.hir_id); + self.typeck_results.node_substs_mut().remove(e.hir_id); } } hir::ExprKind::Binary(ref op, lhs, rhs) | hir::ExprKind::AssignOp(ref op, lhs, rhs) => { - let lhs_ty = self.fcx.node_ty(lhs.hir_id); - let lhs_ty = self.fcx.resolve_vars_if_possible(lhs_ty); - - let rhs_ty = self.fcx.node_ty(rhs.hir_id); - let rhs_ty = self.fcx.resolve_vars_if_possible(rhs_ty); + let lhs_ty = self.typeck_results.node_type(lhs.hir_id); + let rhs_ty = self.typeck_results.node_type(rhs.hir_id); if lhs_ty.is_scalar() && rhs_ty.is_scalar() { - let mut typeck_results = self.fcx.typeck_results.borrow_mut(); - typeck_results.type_dependent_defs_mut().remove(e.hir_id); - typeck_results.node_substs_mut().remove(e.hir_id); + self.typeck_results.type_dependent_defs_mut().remove(e.hir_id); + self.typeck_results.node_substs_mut().remove(e.hir_id); match e.kind { hir::ExprKind::Binary(..) => { if !op.node.is_by_value() { - let mut adjustments = typeck_results.adjustments_mut(); + let mut adjustments = self.typeck_results.adjustments_mut(); if let Some(a) = adjustments.get_mut(lhs.hir_id) { a.pop(); } @@ -182,7 +178,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> { } } hir::ExprKind::AssignOp(..) - if let Some(a) = typeck_results.adjustments_mut().get_mut(lhs.hir_id) => + if let Some(a) = self.typeck_results.adjustments_mut().get_mut(lhs.hir_id) => { a.pop(); } @@ -200,16 +196,14 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> { // if they are not we don't modify the expr, hence we bypass the ICE fn is_builtin_index( &mut self, - typeck_results: &TypeckResults<'tcx>, e: &hir::Expr<'_>, base_ty: Ty<'tcx>, index_ty: Ty<'tcx>, ) -> bool { - if let Some(elem_ty) = base_ty.builtin_index() { - let Some(exp_ty) = typeck_results.expr_ty_opt(e) else {return false;}; - let resolved_exp_ty = self.resolve(exp_ty, &e.span); - - elem_ty == resolved_exp_ty && index_ty == self.fcx.tcx.types.usize + if let Some(elem_ty) = base_ty.builtin_index() + && let Some(exp_ty) = self.typeck_results.expr_ty_opt(e) + { + elem_ty == exp_ty && index_ty == self.fcx.tcx.types.usize } else { false } @@ -221,38 +215,35 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> { // usize-ish fn fix_index_builtin_expr(&mut self, e: &hir::Expr<'_>) { if let hir::ExprKind::Index(ref base, ref index) = e.kind { - let mut typeck_results = self.fcx.typeck_results.borrow_mut(); - // All valid indexing looks like this; might encounter non-valid indexes at this point. - let base_ty = typeck_results - .expr_ty_adjusted_opt(base) - .map(|t| self.fcx.resolve_vars_if_possible(t).kind()); + let base_ty = self.typeck_results.expr_ty_adjusted_opt(base); if base_ty.is_none() { // When encountering `return [0][0]` outside of a `fn` body we can encounter a base // that isn't in the type table. We assume more relevant errors have already been // emitted, so we delay an ICE if none have. (#64638) self.tcx().sess.delay_span_bug(e.span, format!("bad base: `{:?}`", base)); } - if let Some(ty::Ref(_, base_ty, _)) = base_ty { - let index_ty = typeck_results.expr_ty_adjusted_opt(index).unwrap_or_else(|| { - // When encountering `return [0][0]` outside of a `fn` body we would attempt - // to access an nonexistent index. We assume that more relevant errors will - // already have been emitted, so we only gate on this with an ICE if no - // error has been emitted. (#64638) - self.fcx.tcx.ty_error_with_message( - e.span, - format!("bad index {:?} for base: `{:?}`", index, base), - ) - }); - let index_ty = self.fcx.resolve_vars_if_possible(index_ty); - let resolved_base_ty = self.resolve(*base_ty, &base.span); - - if self.is_builtin_index(&typeck_results, e, resolved_base_ty, index_ty) { + if let Some(base_ty) = base_ty + && let ty::Ref(_, base_ty_inner, _) = *base_ty.kind() + { + let index_ty = + self.typeck_results.expr_ty_adjusted_opt(index).unwrap_or_else(|| { + // When encountering `return [0][0]` outside of a `fn` body we would attempt + // to access an nonexistent index. We assume that more relevant errors will + // already have been emitted, so we only gate on this with an ICE if no + // error has been emitted. (#64638) + Ty::new_error_with_message( + self.fcx.tcx, + e.span, + format!("bad index {:?} for base: `{:?}`", index, base), + ) + }); + if self.is_builtin_index(e, base_ty_inner, index_ty) { // Remove the method call record - typeck_results.type_dependent_defs_mut().remove(e.hir_id); - typeck_results.node_substs_mut().remove(e.hir_id); + self.typeck_results.type_dependent_defs_mut().remove(e.hir_id); + self.typeck_results.node_substs_mut().remove(e.hir_id); - if let Some(a) = typeck_results.adjustments_mut().get_mut(base.hir_id) { + if let Some(a) = self.typeck_results.adjustments_mut().get_mut(base.hir_id) { // Discard the need for a mutable borrow // Extra adjustment made when indexing causes a drop @@ -260,7 +251,7 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> { // Since this is "after" the other adjustment to be // discarded, we do an extra `pop()` if let Some(Adjustment { - kind: Adjust::Pointer(PointerCast::Unsize), .. + kind: Adjust::Pointer(PointerCoercion::Unsize), .. }) = a.pop() { // So the borrow discard actually happens here @@ -283,9 +274,6 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> { impl<'cx, 'tcx> Visitor<'tcx> for WritebackCx<'cx, 'tcx> { fn visit_expr(&mut self, e: &'tcx hir::Expr<'tcx>) { - self.fix_scalar_builtin_expr(e); - self.fix_index_builtin_expr(e); - match e.kind { hir::ExprKind::Closure(&hir::Closure { body, .. }) => { let body = self.fcx.tcx.hir().body(body); @@ -314,6 +302,9 @@ impl<'cx, 'tcx> Visitor<'tcx> for WritebackCx<'cx, 'tcx> { self.visit_node_id(e.span, e.hir_id); intravisit::walk_expr(self, e); + + self.fix_scalar_builtin_expr(e); + self.fix_index_builtin_expr(e); } fn visit_generic_param(&mut self, p: &'tcx hir::GenericParam<'tcx>) { @@ -358,7 +349,7 @@ impl<'cx, 'tcx> Visitor<'tcx> for WritebackCx<'cx, 'tcx> { fn visit_local(&mut self, l: &'tcx hir::Local<'tcx>) { intravisit::walk_local(self, l); - let var_ty = self.fcx.local_ty(l.span, l.hir_id).decl_ty; + let var_ty = self.fcx.local_ty(l.span, l.hir_id); let var_ty = self.resolve(var_ty, &l.span); self.write_ty_to_typeck_results(l.hir_id, var_ty); } @@ -583,19 +574,15 @@ impl<'cx, 'tcx> WritebackCx<'cx, 'tcx> { continue; } - let hidden_type = - self.tcx().erase_regions(hidden_type.remap_generic_params_to_declaration_params( - opaque_type_key, - self.tcx(), - true, - )); - + // Here we only detect impl trait definition conflicts when they + // are equal modulo regions. if let Some(last_opaque_ty) = self .typeck_results .concrete_opaque_types - .insert(opaque_type_key.def_id, hidden_type) + .insert(opaque_type_key, hidden_type) && last_opaque_ty.ty != hidden_type.ty { + assert!(!self.fcx.next_trait_solver()); hidden_type .report_mismatch(&last_opaque_ty, opaque_type_key.def_id, self.tcx()) .stash( @@ -816,11 +803,15 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Resolver<'cx, 'tcx> { fn fold_ty(&mut self, t: Ty<'tcx>) -> Ty<'tcx> { match self.fcx.fully_resolve(t) { - Ok(t) if self.fcx.tcx.trait_solver_next() => { + Ok(t) if self.fcx.next_trait_solver() => { // We must normalize erasing regions here, since later lints // expect that types that show up in the typeck are fully // normalized. - self.fcx.tcx.try_normalize_erasing_regions(self.fcx.param_env, t).unwrap_or(t) + if let Ok(t) = self.fcx.tcx.try_normalize_erasing_regions(self.fcx.param_env, t) { + t + } else { + EraseEarlyRegions { tcx: self.fcx.tcx }.fold_ty(t) + } } Ok(t) => { // Do not anonymize late-bound regions @@ -833,7 +824,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Resolver<'cx, 'tcx> { debug!("Resolver::fold_ty: input type `{:?}` not fully resolvable", t); let e = self.report_error(t); self.replaced_with_error = Some(e); - self.fcx.tcx.ty_error(e) + Ty::new_error(self.fcx.tcx, e) } } } @@ -850,7 +841,7 @@ impl<'cx, 'tcx> TypeFolder<TyCtxt<'tcx>> for Resolver<'cx, 'tcx> { debug!("Resolver::fold_const: input const `{:?}` not fully resolvable", ct); let e = self.report_error(ct); self.replaced_with_error = Some(e); - self.fcx.tcx.const_error(ct.ty(), e) + ty::Const::new_error(self.fcx.tcx, e, ct.ty()) } } } |