Rollup of 11 pull requests

compiler/rustc_arena/src/lib.rs

@@ -19,7 +19,6 @@
 #![feature(rustc_attrs)]
 #![cfg_attr(test, feature(test))]
 #![feature(strict_provenance)]
-#![feature(ptr_const_cast)]
 
 use smallvec::SmallVec;
 

compiler/rustc_ast/src/ast.rs

@@ -1338,14 +1338,13 @@ pub enum ExprKind {
     ///
     /// The `PathSegment` represents the method name and its generic arguments
     /// (within the angle brackets).
-    /// The first element of the vector of an `Expr` is the expression that evaluates
-    /// to the object on which the method is being called on (the receiver),
-    /// and the remaining elements are the rest of the arguments.
-    /// Thus, `x.foo::<Bar, Baz>(a, b, c, d)` is represented as
-    /// `ExprKind::MethodCall(PathSegment { foo, [Bar, Baz] }, [x, a, b, c, d])`.
+    /// The standalone `Expr` is the receiver expression.
+    /// The vector of `Expr` is the arguments.
+    /// `x.foo::<Bar, Baz>(a, b, c, d)` is represented as
+    /// `ExprKind::MethodCall(PathSegment { foo, [Bar, Baz] }, x, [a, b, c, d])`.
     /// This `Span` is the span of the function, without the dot and receiver
     /// (e.g. `foo(a, b)` in `x.foo(a, b)`
-    MethodCall(PathSegment, Vec<P<Expr>>, Span),
+    MethodCall(PathSegment, P<Expr>, Vec<P<Expr>>, Span),
     /// A tuple (e.g., `(a, b, c, d)`).
     Tup(Vec<P<Expr>>),
     /// A binary operation (e.g., `a + b`, `a * b`).
@@ -3030,22 +3029,25 @@ pub type ForeignItem = Item<ForeignItemKind>;
 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
 mod size_asserts {
     use super::*;
+    use rustc_data_structures::static_assert_size;
     // These are in alphabetical order, which is easy to maintain.
-    rustc_data_structures::static_assert_size!(AssocItemKind, 72);
-    rustc_data_structures::static_assert_size!(Attribute, 152);
-    rustc_data_structures::static_assert_size!(Block, 48);
-    rustc_data_structures::static_assert_size!(Expr, 104);
-    rustc_data_structures::static_assert_size!(Fn, 192);
-    rustc_data_structures::static_assert_size!(ForeignItemKind, 72);
-    rustc_data_structures::static_assert_size!(GenericBound, 88);
-    rustc_data_structures::static_assert_size!(Generics, 72);
-    rustc_data_structures::static_assert_size!(Impl, 200);
-    rustc_data_structures::static_assert_size!(Item, 200);
-    rustc_data_structures::static_assert_size!(ItemKind, 112);
-    rustc_data_structures::static_assert_size!(Lit, 48);
-    rustc_data_structures::static_assert_size!(Pat, 120);
-    rustc_data_structures::static_assert_size!(Path, 40);
-    rustc_data_structures::static_assert_size!(PathSegment, 24);
-    rustc_data_structures::static_assert_size!(Stmt, 32);
-    rustc_data_structures::static_assert_size!(Ty, 96);
+    static_assert_size!(AssocItem, 160);
+    static_assert_size!(AssocItemKind, 72);
+    static_assert_size!(Attribute, 152);
+    static_assert_size!(Block, 48);
+    static_assert_size!(Expr, 104);
+    static_assert_size!(Fn, 192);
+    static_assert_size!(ForeignItem, 160);
+    static_assert_size!(ForeignItemKind, 72);
+    static_assert_size!(GenericBound, 88);
+    static_assert_size!(Generics, 72);
+    static_assert_size!(Impl, 200);
+    static_assert_size!(Item, 200);
+    static_assert_size!(ItemKind, 112);
+    static_assert_size!(Lit, 48);
+    static_assert_size!(Pat, 120);
+    static_assert_size!(Path, 40);
+    static_assert_size!(PathSegment, 24);
+    static_assert_size!(Stmt, 32);
+    static_assert_size!(Ty, 96);
 }

compiler/rustc_ast/src/mut_visit.rs

@@ -1302,10 +1302,11 @@ pub fn noop_visit_expr<T: MutVisitor>(
             vis.visit_expr(f);
             visit_exprs(args, vis);
         }
-        ExprKind::MethodCall(PathSegment { ident, id, args }, exprs, span) => {
+        ExprKind::MethodCall(PathSegment { ident, id, args }, receiver, exprs, span) => {
             vis.visit_ident(ident);
             vis.visit_id(id);
             visit_opt(args, |args| vis.visit_generic_args(args));
+            vis.visit_expr(receiver);
             visit_exprs(exprs, vis);
             vis.visit_span(span);
         }

compiler/rustc_ast/src/util/parser.rs

@@ -396,9 +396,9 @@ pub fn contains_exterior_struct_lit(value: &ast::Expr) -> bool {
             contains_exterior_struct_lit(&x)
         }
 
-        ast::ExprKind::MethodCall(.., ref exprs, _) => {
+        ast::ExprKind::MethodCall(_, ref receiver, _, _) => {
             // X { y: 1 }.bar(...)
-            contains_exterior_struct_lit(&exprs[0])
+            contains_exterior_struct_lit(&receiver)
         }
 
         _ => false,

compiler/rustc_ast/src/visit.rs

@@ -813,8 +813,9 @@ pub fn walk_expr<'a, V: Visitor<'a>>(visitor: &mut V, expression: &'a Expr) {
             visitor.visit_expr(callee_expression);
             walk_list!(visitor, visit_expr, arguments);
         }
-        ExprKind::MethodCall(ref segment, ref arguments, _span) => {
+        ExprKind::MethodCall(ref segment, ref receiver, ref arguments, _span) => {
             visitor.visit_path_segment(expression.span, segment);
+            visitor.visit_expr(receiver);
             walk_list!(visitor, visit_expr, arguments);
         }
         ExprKind::Binary(_, ref left_expression, ref right_expression) => {

compiler/rustc_ast_lowering/src/expr.rs

@@ -62,15 +62,17 @@ impl<'hir> LoweringContext<'_, 'hir> {
                         hir::ExprKind::Call(f, self.lower_exprs(args))
                     }
                 }
-                ExprKind::MethodCall(ref seg, ref args, span) => {
+                ExprKind::MethodCall(ref seg, ref receiver, ref args, span) => {
                     let hir_seg = self.arena.alloc(self.lower_path_segment(
                         e.span,
                         seg,
                         ParamMode::Optional,
                         ParenthesizedGenericArgs::Err,
                         ImplTraitContext::Disallowed(ImplTraitPosition::Path),
                     ));
-                    let args = self.lower_exprs(args);
+                    let args = self.arena.alloc_from_iter(
+                        [&*receiver].into_iter().chain(args.iter()).map(|x| self.lower_expr_mut(x)),
+                    );
                     hir::ExprKind::MethodCall(hir_seg, args, self.lower_span(span))
                 }
                 ExprKind::Binary(binop, ref lhs, ref rhs) => {

compiler/rustc_ast_passes/src/ast_validation.rs

@@ -13,9 +13,7 @@ use rustc_ast::walk_list;
 use rustc_ast::*;
 use rustc_ast_pretty::pprust::{self, State};
 use rustc_data_structures::fx::FxHashMap;
-use rustc_errors::{
-    error_code, pluralize, struct_span_err, Applicability, DiagnosticBuilder, ErrorGuaranteed,
-};
+use rustc_errors::{error_code, pluralize, struct_span_err, Applicability, Diagnostic};
 use rustc_parse::validate_attr;
 use rustc_session::lint::builtin::{
     DEPRECATED_WHERE_CLAUSE_LOCATION, MISSING_ABI, PATTERNS_IN_FNS_WITHOUT_BODY,
@@ -477,7 +475,7 @@ impl<'a> AstValidator<'a> {
         ctx: &str,
         msg: &str,
         sugg: &str,
-        help: impl FnOnce(&mut DiagnosticBuilder<'_, ErrorGuaranteed>),
+        help: impl FnOnce(&mut Diagnostic),
     ) {
         let source_map = self.session.source_map();
         let end = source_map.end_point(sp);
@@ -1196,7 +1194,7 @@ impl<'a> Visitor<'a> for AstValidator<'a> {
                     let msg = "free function without a body";
                     let ext = sig.header.ext;
 
-                    let f = |e: &mut DiagnosticBuilder<'_, _>| {
+                    let f = |e: &mut Diagnostic| {
                         if let Extern::Implicit(start_span) | Extern::Explicit(_, start_span) = &ext
                         {
                             let start_suggestion = if let Extern::Explicit(abi, _) = ext {

compiler/rustc_ast_pretty/src/pprust/state/expr.rs

@@ -193,9 +193,13 @@ impl<'a> State<'a> {
         self.print_call_post(args)
     }
 
-    fn print_expr_method_call(&mut self, segment: &ast::PathSegment, args: &[P<ast::Expr>]) {
-        let base_args = &args[1..];
-        self.print_expr_maybe_paren(&args[0], parser::PREC_POSTFIX);
+    fn print_expr_method_call(
+        &mut self,
+        segment: &ast::PathSegment,
+        receiver: &ast::Expr,
+        base_args: &[P<ast::Expr>],
+    ) {
+        self.print_expr_maybe_paren(receiver, parser::PREC_POSTFIX);
         self.word(".");
         self.print_ident(segment.ident);
         if let Some(ref args) = segment.args {
@@ -303,8 +307,8 @@ impl<'a> State<'a> {
             ast::ExprKind::Call(ref func, ref args) => {
                 self.print_expr_call(func, &args);
             }
-            ast::ExprKind::MethodCall(ref segment, ref args, _) => {
-                self.print_expr_method_call(segment, &args);
+            ast::ExprKind::MethodCall(ref segment, ref receiver, ref args, _) => {
+                self.print_expr_method_call(segment, &receiver, &args);
             }
             ast::ExprKind::Binary(op, ref lhs, ref rhs) => {
                 self.print_expr_binary(op, lhs, rhs);

compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs

@@ -451,7 +451,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
 
     fn suggest_borrow_fn_like(
         &self,
-        err: &mut DiagnosticBuilder<'tcx, ErrorGuaranteed>,
+        err: &mut Diagnostic,
         ty: Ty<'tcx>,
         move_sites: &[MoveSite],
         value_name: &str,
@@ -526,12 +526,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
         true
     }
 
-    fn suggest_adding_copy_bounds(
-        &self,
-        err: &mut DiagnosticBuilder<'tcx, ErrorGuaranteed>,
-        ty: Ty<'tcx>,
-        span: Span,
-    ) {
+    fn suggest_adding_copy_bounds(&self, err: &mut Diagnostic, ty: Ty<'tcx>, span: Span) {
         let tcx = self.infcx.tcx;
         let generics = tcx.generics_of(self.mir_def_id());
 

compiler/rustc_borrowck/src/diagnostics/region_errors.rs

@@ -783,7 +783,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
 
     fn maybe_suggest_constrain_dyn_trait_impl(
         &self,
-        diag: &mut DiagnosticBuilder<'tcx, ErrorGuaranteed>,
+        diag: &mut Diagnostic,
         f: Region<'tcx>,
         o: Region<'tcx>,
         category: &ConstraintCategory<'tcx>,

compiler/rustc_builtin_macros/src/assert/context.rs

@@ -240,8 +240,8 @@ impl<'cx, 'a> Context<'cx, 'a> {
                 self.manage_cond_expr(prefix);
                 self.manage_cond_expr(suffix);
             }
-            ExprKind::MethodCall(_, ref mut local_exprs, _) => {
-                for local_expr in local_exprs.iter_mut().skip(1) {
+            ExprKind::MethodCall(_, _,ref mut local_exprs, _) => {
+                for local_expr in local_exprs.iter_mut() {
                     self.manage_cond_expr(local_expr);
                 }
             }
@@ -377,14 +377,12 @@ impl<'cx, 'a> Context<'cx, 'a> {
                     id: DUMMY_NODE_ID,
                     ident: Ident::new(sym::try_capture, self.span),
                 },
-                vec![
-                    expr_paren(self.cx, self.span, self.cx.expr_addr_of(self.span, wrapper)),
-                    expr_addr_of_mut(
-                        self.cx,
-                        self.span,
-                        self.cx.expr_path(Path::from_ident(capture)),
-                    ),
-                ],
+                expr_paren(self.cx, self.span, self.cx.expr_addr_of(self.span, wrapper)),
+                vec![expr_addr_of_mut(
+                    self.cx,
+                    self.span,
+                    self.cx.expr_path(Path::from_ident(capture)),
+                )],
                 self.span,
             ))
             .add_trailing_semicolon();
@@ -442,10 +440,11 @@ fn expr_addr_of_mut(cx: &ExtCtxt<'_>, sp: Span, e: P<Expr>) -> P<Expr> {
 fn expr_method_call(
     cx: &ExtCtxt<'_>,
     path: PathSegment,
+    receiver: P<Expr>,
     args: Vec<P<Expr>>,
     span: Span,
 ) -> P<Expr> {
-    cx.expr(span, ExprKind::MethodCall(path, args, span))
+    cx.expr(span, ExprKind::MethodCall(path, receiver, args, span))
 }
 
 fn expr_paren(cx: &ExtCtxt<'_>, sp: Span, e: P<Expr>) -> P<Expr> {

compiler/rustc_const_eval/src/interpret/operand.rs

@@ -823,9 +823,10 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
 mod size_asserts {
     use super::*;
+    use rustc_data_structures::static_assert_size;
     // These are in alphabetical order, which is easy to maintain.
-    rustc_data_structures::static_assert_size!(Immediate, 56);
-    rustc_data_structures::static_assert_size!(ImmTy<'_>, 72);
-    rustc_data_structures::static_assert_size!(Operand, 64);
-    rustc_data_structures::static_assert_size!(OpTy<'_>, 88);
+    static_assert_size!(Immediate, 56);
+    static_assert_size!(ImmTy<'_>, 72);
+    static_assert_size!(Operand, 64);
+    static_assert_size!(OpTy<'_>, 88);
 }

compiler/rustc_const_eval/src/interpret/place.rs

@@ -891,10 +891,11 @@ where
 #[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
 mod size_asserts {
     use super::*;
+    use rustc_data_structures::static_assert_size;
     // These are in alphabetical order, which is easy to maintain.
-    rustc_data_structures::static_assert_size!(MemPlaceMeta, 24);
-    rustc_data_structures::static_assert_size!(MemPlace, 40);
-    rustc_data_structures::static_assert_size!(MPlaceTy<'_>, 64);
-    rustc_data_structures::static_assert_size!(Place, 48);
-    rustc_data_structures::static_assert_size!(PlaceTy<'_>, 72);
+    static_assert_size!(MemPlaceMeta, 24);
+    static_assert_size!(MemPlace, 40);
+    static_assert_size!(MPlaceTy<'_>, 64);
+    static_assert_size!(Place, 48);
+    static_assert_size!(PlaceTy<'_>, 72);
 }

compiler/rustc_expand/src/mbe/macro_rules.rs

@@ -14,7 +14,7 @@ use rustc_ast::{NodeId, DUMMY_NODE_ID};
 use rustc_ast_pretty::pprust;
 use rustc_attr::{self as attr, TransparencyError};
 use rustc_data_structures::fx::{FxHashMap, FxIndexMap};
-use rustc_errors::{Applicability, Diagnostic, DiagnosticBuilder, ErrorGuaranteed};
+use rustc_errors::{Applicability, Diagnostic, DiagnosticBuilder};
 use rustc_feature::Features;
 use rustc_lint_defs::builtin::{
     RUST_2021_INCOMPATIBLE_OR_PATTERNS, SEMICOLON_IN_EXPRESSIONS_FROM_MACROS,
@@ -608,11 +608,7 @@ enum ExplainDocComment {
     },
 }
 
-fn annotate_doc_comment(
-    err: &mut DiagnosticBuilder<'_, ErrorGuaranteed>,
-    sm: &SourceMap,
-    span: Span,
-) {
+fn annotate_doc_comment(err: &mut Diagnostic, sm: &SourceMap, span: Span) {
     if let Ok(src) = sm.span_to_snippet(span) {
         if src.starts_with("///") || src.starts_with("/**") {
             err.subdiagnostic(ExplainDocComment::Outer { span });

compiler/rustc_hir/src/hir.rs

@@ -3491,16 +3491,16 @@ impl<'hir> Node<'hir> {
 mod size_asserts {
     use super::*;
     // These are in alphabetical order, which is easy to maintain.
-    rustc_data_structures::static_assert_size!(Block<'static>, 48);
-    rustc_data_structures::static_assert_size!(Expr<'static>, 56);
-    rustc_data_structures::static_assert_size!(ForeignItem<'static>, 72);
-    rustc_data_structures::static_assert_size!(GenericBound<'_>, 48);
-    rustc_data_structures::static_assert_size!(Generics<'static>, 56);
-    rustc_data_structures::static_assert_size!(ImplItem<'static>, 88);
-    rustc_data_structures::static_assert_size!(Impl<'static>, 80);
-    rustc_data_structures::static_assert_size!(Item<'static>, 80);
-    rustc_data_structures::static_assert_size!(Pat<'static>, 88);
-    rustc_data_structures::static_assert_size!(QPath<'static>, 24);
-    rustc_data_structures::static_assert_size!(TraitItem<'static>, 96);
-    rustc_data_structures::static_assert_size!(Ty<'static>, 72);
+    static_assert_size!(Block<'static>, 48);
+    static_assert_size!(Expr<'static>, 56);
+    static_assert_size!(ForeignItem<'static>, 72);
+    static_assert_size!(GenericBound<'_>, 48);
+    static_assert_size!(Generics<'static>, 56);
+    static_assert_size!(ImplItem<'static>, 88);
+    static_assert_size!(Impl<'static>, 80);
+    static_assert_size!(Item<'static>, 80);
+    static_assert_size!(Pat<'static>, 88);
+    static_assert_size!(QPath<'static>, 24);
+    static_assert_size!(TraitItem<'static>, 96);
+    static_assert_size!(Ty<'static>, 72);
 }

compiler/rustc_lint/src/unused.rs

@@ -608,8 +608,7 @@ trait UnusedDelimLint {
             ref call_or_other => {
                 let (args_to_check, ctx) = match *call_or_other {
                     Call(_, ref args) => (&args[..], UnusedDelimsCtx::FunctionArg),
-                    // first "argument" is self (which sometimes needs delims)
-                    MethodCall(_, ref args, _) => (&args[1..], UnusedDelimsCtx::MethodArg),
+                    MethodCall(_, _, ref args, _) => (&args[..], UnusedDelimsCtx::MethodArg),
                     // actual catch-all arm
                     _ => {
                         return;

compiler/rustc_middle/src/thir.rs

@@ -814,8 +814,8 @@ impl<'tcx> fmt::Display for Pat<'tcx> {
 mod size_asserts {
     use super::*;
     // These are in alphabetical order, which is easy to maintain.
-    rustc_data_structures::static_assert_size!(Block, 56);
-    rustc_data_structures::static_assert_size!(Expr<'_>, 104);
-    rustc_data_structures::static_assert_size!(Pat<'_>, 24);
-    rustc_data_structures::static_assert_size!(Stmt<'_>, 120);
+    static_assert_size!(Block, 56);
+    static_assert_size!(Expr<'_>, 104);
+    static_assert_size!(Pat<'_>, 24);
+    static_assert_size!(Stmt<'_>, 120);
 }

compiler/rustc_mir_build/src/build/matches/mod.rs

@@ -170,7 +170,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
 
         let mut arm_candidates = self.create_match_candidates(scrutinee_place.clone(), &arms);
 
-        let match_has_guard = arms.iter().copied().any(|arm| self.thir[arm].guard.is_some());
+        let match_has_guard = arm_candidates.iter().any(|(_, candidate)| candidate.has_guard);
         let mut candidates =
             arm_candidates.iter_mut().map(|(_, candidate)| candidate).collect::<Vec<_>>();
 

compiler/rustc_mir_transform/src/elaborate_box_derefs.rs

@@ -70,7 +70,6 @@ impl<'tcx, 'a> MutVisitor<'tcx> for ElaborateBoxDerefVisitor<'tcx, 'a> {
                 build_ptr_tys(tcx, base_ty.boxed_ty(), self.unique_did, self.nonnull_did);
 
             let ptr_local = self.patch.new_temp(ptr_ty, source_info.span);
-            self.local_decls.push(LocalDecl::new(ptr_ty, source_info.span));
 
             self.patch.add_statement(location, StatementKind::StorageLive(ptr_local));
 
@@ -125,13 +124,6 @@ impl<'tcx> MirPass<'tcx> for ElaborateBoxDerefs {
                     index += 1;
                 }
 
-                if let Some(terminator) = terminator
-                && !matches!(terminator.kind, TerminatorKind::Yield{..})
-                {
-                    let location = Location { block, statement_index: index };
-                    visitor.visit_terminator(terminator, location);
-                }
-
                 let location = Location { block, statement_index: index };
                 match terminator {
                     // yielding into a box is handled when lowering generators