rustc: expose the mir::Body reference lifetime from mir::ReadOnlyBodyCache (rust-lang#64736 fallout).

Author: eddyb

src/librustc/mir/cache.rs

@@ -279,18 +279,10 @@ impl<'a, 'b, 'tcx> graph::GraphSuccessors<'b> for ReadOnlyBodyCache<'a, 'tcx> {
 
 
 impl Deref for ReadOnlyBodyCache<'a, 'tcx> {
-    type Target = Body<'tcx>;
+    type Target = &'a Body<'tcx>;
 
     fn deref(&self) -> &Self::Target {
-        self.body
-    }
-}
-
-impl Index<BasicBlock> for ReadOnlyBodyCache<'a, 'tcx> {
-    type Output = BasicBlockData<'tcx>;
-
-    fn index(&self, index: BasicBlock) -> &BasicBlockData<'tcx> {
-        &self.body[index]
+        &self.body
     }
 }
 

src/librustc_codegen_ssa/mir/analyze.rs

@@ -131,7 +131,7 @@ impl<Bx: BuilderMethods<'a, 'tcx>> LocalAnalyzer<'mir, 'a, 'tcx, Bx> {
             };
             if is_consume {
                 let base_ty =
-                    mir::Place::ty_from(place_ref.base, proj_base, &*self.fx.mir, cx.tcx());
+                    mir::Place::ty_from(place_ref.base, proj_base, *self.fx.mir, cx.tcx());
                 let base_ty = self.fx.monomorphize(&base_ty);
 
                 // ZSTs don't require any actual memory access.

src/librustc_codegen_ssa/mir/block.rs

@@ -324,7 +324,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         target: mir::BasicBlock,
         unwind: Option<mir::BasicBlock>,
     ) {
-        let ty = location.ty(&*self.mir, bx.tcx()).ty;
+        let ty = location.ty(*self.mir, bx.tcx()).ty;
         let ty = self.monomorphize(&ty);
         let drop_fn = Instance::resolve_drop_in_place(bx.tcx(), ty);
 
@@ -510,7 +510,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
 
         let extra_args = &args[sig.inputs().len()..];
         let extra_args = extra_args.iter().map(|op_arg| {
-            let op_ty = op_arg.ty(&*self.mir, bx.tcx());
+            let op_ty = op_arg.ty(*self.mir, bx.tcx());
             self.monomorphize(&op_ty)
         }).collect::<Vec<_>>();
 

src/librustc_codegen_ssa/mir/place.rs

@@ -594,7 +594,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         let place_ty = mir::Place::ty_from(
             place_ref.base,
             place_ref.projection,
-            &*self.mir,
+            *self.mir,
             tcx,
         );
         self.monomorphize(&place_ty.ty)

src/librustc_codegen_ssa/mir/rvalue.rs

@@ -460,7 +460,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
             }
 
             mir::Rvalue::Discriminant(ref place) => {
-                let discr_ty = rvalue.ty(&*self.mir, bx.tcx());
+                let discr_ty = rvalue.ty(*self.mir, bx.tcx());
                 let discr =  self.codegen_place(&mut bx, &place.as_ref())
                     .codegen_get_discr(&mut bx, discr_ty);
                 (bx, OperandRef {
@@ -513,7 +513,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
             mir::Rvalue::Aggregate(..) => {
                 // According to `rvalue_creates_operand`, only ZST
                 // aggregate rvalues are allowed to be operands.
-                let ty = rvalue.ty(&*self.mir, self.cx.tcx());
+                let ty = rvalue.ty(*self.mir, self.cx.tcx());
                 let operand = OperandRef::new_zst(
                     &mut bx,
                     self.cx.layout_of(self.monomorphize(&ty)),
@@ -710,7 +710,7 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                 true,
             mir::Rvalue::Repeat(..) |
             mir::Rvalue::Aggregate(..) => {
-                let ty = rvalue.ty(&*self.mir, self.cx.tcx());
+                let ty = rvalue.ty(*self.mir, self.cx.tcx());
                 let ty = self.monomorphize(&ty);
                 self.cx.spanned_layout_of(ty, span).is_zst()
             }

src/librustc_mir/borrow_check/conflict_errors.rs

@@ -208,7 +208,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
             let ty = Place::ty_from(
                 used_place.base,
                 used_place.projection,
-                &*self.body,
+                *self.body,
                 self.infcx.tcx
             ).ty;
             let needs_note = match ty.kind {
@@ -225,7 +225,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                 let mpi = self.move_data.moves[move_out_indices[0]].path;
                 let place = &self.move_data.move_paths[mpi].place;
 
-                let ty = place.ty(&*self.body, self.infcx.tcx).ty;
+                let ty = place.ty(*self.body, self.infcx.tcx).ty;
                 let opt_name =
                     self.describe_place_with_options(place.as_ref(), IncludingDowncast(true));
                 let note_msg = match opt_name {
@@ -625,7 +625,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
             let ty = Place::ty_from(
                 place_base,
                 place_projection,
-                &*self.body,
+                *self.body,
                 self.infcx.tcx
             ).ty;
             ty.ty_adt_def().filter(|adt| adt.is_union()).map(|_| ty)
@@ -1635,7 +1635,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                                 Place::ty_from(
                                     &place.base,
                                     proj_base,
-                                    &*self.body,
+                                    *self.body,
                                     tcx
                                 ).ty.is_box(),
                                 "Drop of value behind a reference or raw pointer"
@@ -1648,7 +1648,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                         let base_ty = Place::ty_from(
                             &place.base,
                             proj_base,
-                            &*self.body,
+                            *self.body,
                             tcx
                         ).ty;
                         match base_ty.kind {

src/librustc_mir/borrow_check/error_reporting.rs

@@ -372,7 +372,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                     let base_ty = Place::ty_from(
                         place.base,
                         place.projection,
-                        &*self.body,
+                        *self.body,
                         self.infcx.tcx).ty;
                     self.describe_field_from_ty(&base_ty, field, Some(*variant_index))
                 }
@@ -502,7 +502,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
                         ..
                     }) = bbd.terminator {
                         if let Some(source) = BorrowedContentSource::from_call(
-                            func.ty(&*self.body, tcx),
+                            func.ty(*self.body, tcx),
                             tcx
                         ) {
                             return source;
@@ -519,7 +519,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
         let base_ty = Place::ty_from(
             deref_base.base,
             deref_base.projection,
-            &*self.body,
+            *self.body,
             tcx
         ).ty;
         if base_ty.is_unsafe_ptr() {

src/librustc_mir/borrow_check/mod.rs

@@ -646,7 +646,7 @@ impl<'cx, 'tcx> DataflowResultsConsumer<'cx, 'tcx> for MirBorrowckCtxt<'cx, 'tcx
                 let tcx = self.infcx.tcx;
 
                 // Compute the type with accurate region information.
-                let drop_place_ty = drop_place.ty(&*self.body, self.infcx.tcx);
+                let drop_place_ty = drop_place.ty(*self.body, self.infcx.tcx);
 
                 // Erase the regions.
                 let drop_place_ty = self.infcx.tcx.erase_regions(&drop_place_ty).ty;

src/librustc_mir/borrow_check/move_errors.rs

@@ -300,7 +300,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
         // Inspect the type of the content behind the
         // borrow to provide feedback about why this
         // was a move rather than a copy.
-        let ty = deref_target_place.ty(&*self.body, self.infcx.tcx).ty;
+        let ty = deref_target_place.ty(*self.body, self.infcx.tcx).ty;
         let upvar_field = self.prefixes(move_place.as_ref(), PrefixSet::All)
             .find_map(|p| self.is_upvar_field_projection(p));
 
@@ -411,7 +411,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
         };
         let move_ty = format!(
             "{:?}",
-            move_place.ty(&*self.body, self.infcx.tcx).ty,
+            move_place.ty(*self.body, self.infcx.tcx).ty,
         );
         if let Ok(snippet) = self.infcx.tcx.sess.source_map().span_to_snippet(span) {
             let is_option = move_ty.starts_with("std::option::Option");
@@ -454,7 +454,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                 }
 
                 if binds_to.is_empty() {
-                    let place_ty = move_from.ty(&*self.body, self.infcx.tcx).ty;
+                    let place_ty = move_from.ty(*self.body, self.infcx.tcx).ty;
                     let place_desc = match self.describe_place(move_from.as_ref()) {
                         Some(desc) => format!("`{}`", desc),
                         None => format!("value"),
@@ -482,7 +482,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
             // No binding. Nothing to suggest.
             GroupedMoveError::OtherIllegalMove { ref original_path, use_spans, .. } => {
                 let span = use_spans.var_or_use();
-                let place_ty = original_path.ty(&*self.body, self.infcx.tcx).ty;
+                let place_ty = original_path.ty(*self.body, self.infcx.tcx).ty;
                 let place_desc = match self.describe_place(original_path.as_ref()) {
                     Some(desc) => format!("`{}`", desc),
                     None => format!("value"),

src/librustc_mir/borrow_check/mutability_errors.rs

@@ -64,7 +64,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                     Place::ty_from(
                         &the_place_err.base,
                         proj_base,
-                        &*self.body,
+                        *self.body,
                         self.infcx.tcx
                     ).ty));
 
@@ -115,7 +115,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                         Place::ty_from(
                             the_place_err.base,
                             the_place_err.projection,
-                            &*self.body,
+                            *self.body,
                             self.infcx.tcx
                         )
                         .ty
@@ -229,7 +229,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
 
                 if let Some((span, message)) = annotate_struct_field(
                     self.infcx.tcx,
-                    Place::ty_from(base, proj_base, &*self.body, self.infcx.tcx).ty,
+                    Place::ty_from(base, proj_base, *self.body, self.infcx.tcx).ty,
                     field,
                 ) {
                     err.span_suggestion(
@@ -304,7 +304,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> {
                 projection: [proj_base @ .., ProjectionElem::Field(upvar_index, _)],
             } => {
                 debug_assert!(is_closure_or_generator(
-                    Place::ty_from(base, proj_base, &*self.body, self.infcx.tcx).ty
+                    Place::ty_from(base, proj_base, *self.body, self.infcx.tcx).ty
                 ));
 
                 err.span_label(span, format!("cannot {ACT}", ACT = act));

src/librustc_mir/borrow_check/nll/type_check/mod.rs

@@ -1413,9 +1413,9 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     _ => ConstraintCategory::Assignment,
                 };
 
-                let place_ty = place.ty(&*body, tcx).ty;
+                let place_ty = place.ty(*body, tcx).ty;
                 let place_ty = self.normalize(place_ty, location);
-                let rv_ty = rv.ty(&*body, tcx);
+                let rv_ty = rv.ty(*body, tcx);
                 let rv_ty = self.normalize(rv_ty, location);
                 if let Err(terr) =
                     self.sub_types_or_anon(rv_ty, place_ty, location.to_locations(), category)
@@ -1467,7 +1467,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                 ref place,
                 variant_index,
             } => {
-                let place_type = place.ty(&*body, tcx).ty;
+                let place_type = place.ty(*body, tcx).ty;
                 let adt = match place_type.kind {
                     ty::Adt(adt, _) if adt.is_enum() => adt,
                     _ => {
@@ -1489,7 +1489,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                 };
             }
             StatementKind::AscribeUserType(box(ref place, ref projection), variance) => {
-                let place_ty = place.ty(&*body, tcx).ty;
+                let place_ty = place.ty(*body, tcx).ty;
                 if let Err(terr) = self.relate_type_and_user_type(
                     place_ty,
                     variance,
@@ -2010,7 +2010,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     // While this is located in `nll::typeck` this error is not an NLL error, it's
                     // a required check to make sure that repeated elements implement `Copy`.
                     let span = body.source_info(location).span;
-                    let ty = operand.ty(&*body, tcx);
+                    let ty = operand.ty(*body, tcx);
                     if !self.infcx.type_is_copy_modulo_regions(self.param_env, ty, span) {
                         // To determine if `const_in_array_repeat_expressions` feature gate should
                         // be mentioned, need to check if the rvalue is promotable.
@@ -2064,7 +2064,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
             Rvalue::Cast(cast_kind, op, ty) => {
                 match cast_kind {
                     CastKind::Pointer(PointerCast::ReifyFnPointer) => {
-                        let fn_sig = op.ty(&*body, tcx).fn_sig(tcx);
+                        let fn_sig = op.ty(*body, tcx).fn_sig(tcx);
 
                         // The type that we see in the fcx is like
                         // `foo::<'a, 'b>`, where `foo` is the path to a
@@ -2093,7 +2093,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     }
 
                     CastKind::Pointer(PointerCast::ClosureFnPointer(unsafety)) => {
-                        let sig = match op.ty(&*body, tcx).kind {
+                        let sig = match op.ty(*body, tcx).kind {
                             ty::Closure(def_id, substs) => {
                                 substs.as_closure().sig_ty(def_id, tcx).fn_sig(tcx)
                             }
@@ -2119,7 +2119,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     }
 
                     CastKind::Pointer(PointerCast::UnsafeFnPointer) => {
-                        let fn_sig = op.ty(&*body, tcx).fn_sig(tcx);
+                        let fn_sig = op.ty(*body, tcx).fn_sig(tcx);
 
                         // The type that we see in the fcx is like
                         // `foo::<'a, 'b>`, where `foo` is the path to a
@@ -2151,7 +2151,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                         let &ty = ty;
                         let trait_ref = ty::TraitRef {
                             def_id: tcx.lang_items().coerce_unsized_trait().unwrap(),
-                            substs: tcx.mk_substs_trait(op.ty(&*body, tcx), &[ty.into()]),
+                            substs: tcx.mk_substs_trait(op.ty(*body, tcx), &[ty.into()]),
                         };
 
                         self.prove_trait_ref(
@@ -2162,7 +2162,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     }
 
                     CastKind::Pointer(PointerCast::MutToConstPointer) => {
-                        let ty_from = match op.ty(&*body, tcx).kind {
+                        let ty_from = match op.ty(*body, tcx).kind {
                             ty::RawPtr(ty::TypeAndMut {
                                 ty: ty_from,
                                 mutbl: hir::Mutability::Mutable,
@@ -2210,7 +2210,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     }
 
                     CastKind::Pointer(PointerCast::ArrayToPointer)  => {
-                        let ty_from = op.ty(&*body, tcx);
+                        let ty_from = op.ty(*body, tcx);
 
                         let opt_ty_elem = match ty_from.kind {
                             ty::RawPtr(
@@ -2272,7 +2272,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
                     }
 
                     CastKind::Misc => {
-                        let ty_from = op.ty(&*body, tcx);
+                        let ty_from = op.ty(*body, tcx);
                         let cast_ty_from = CastTy::from_ty(ty_from);
                         let cast_ty_to = CastTy::from_ty(ty);
                         match (cast_ty_from, cast_ty_to) {
@@ -2339,9 +2339,9 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
             | Rvalue::BinaryOp(BinOp::Le, left, right)
             | Rvalue::BinaryOp(BinOp::Gt, left, right)
             | Rvalue::BinaryOp(BinOp::Ge, left, right) => {
-                let ty_left = left.ty(&*body, tcx);
+                let ty_left = left.ty(*body, tcx);
                 if let ty::RawPtr(_) | ty::FnPtr(_) = ty_left.kind {
-                    let ty_right = right.ty(&*body, tcx);
+                    let ty_right = right.ty(*body, tcx);
                     let common_ty = self.infcx.next_ty_var(
                         TypeVariableOrigin {
                             kind: TypeVariableOriginKind::MiscVariable,

src/librustc_mir/borrow_check/prefixes.rs

@@ -143,7 +143,7 @@ impl<'cx, 'tcx> Iterator for Prefixes<'cx, 'tcx> {
                     // derefs, except we stop at the deref of a shared
                     // reference.
 
-                    let ty = Place::ty_from(cursor.base, proj_base, &*self.body, self.tcx).ty;
+                    let ty = Place::ty_from(cursor.base, proj_base, *self.body, self.tcx).ty;
                     match ty.kind {
                         ty::RawPtr(_) |
                         ty::Ref(

src/librustc_mir/transform/check_consts/qualifs.rs

@@ -51,7 +51,7 @@ pub trait Qualif {
             });
             let qualif = base_qualif && Self::in_any_value_of_ty(
                 cx,
-                Place::ty_from(place.base, proj_base, &*cx.body, cx.tcx)
+                Place::ty_from(place.base, proj_base, *cx.body, cx.tcx)
                     .projection_ty(cx.tcx, elem)
                     .ty,
             );
@@ -155,7 +155,7 @@ pub trait Qualif {
                 // Special-case reborrows to be more like a copy of the reference.
                 if let &[ref proj_base @ .., elem] = place.projection.as_ref() {
                     if ProjectionElem::Deref == elem {
-                        let base_ty = Place::ty_from(&place.base, proj_base, &*cx.body, cx.tcx).ty;
+                        let base_ty = Place::ty_from(&place.base, proj_base, *cx.body, cx.tcx).ty;
                         if let ty::Ref(..) = base_ty.kind {
                             return Self::in_place(cx, per_local, PlaceRef {
                                 base: &place.base,
@@ -221,7 +221,7 @@ impl Qualif for HasMutInterior {
             Rvalue::Aggregate(ref kind, _) => {
                 if let AggregateKind::Adt(def, ..) = **kind {
                     if Some(def.did) == cx.tcx.lang_items().unsafe_cell_type() {
-                        let ty = rvalue.ty(&*cx.body, cx.tcx);
+                        let ty = rvalue.ty(*cx.body, cx.tcx);
                         assert_eq!(Self::in_any_value_of_ty(cx, ty), true);
                         return true;
                     }

src/librustc_mir/transform/check_consts/resolver.rs

@@ -77,7 +77,7 @@ where
         args: &[mir::Operand<'tcx>],
         return_place: &mir::Place<'tcx>,
     ) {
-        let return_ty = return_place.ty(&*self.item.body, self.item.tcx).ty;
+        let return_ty = return_place.ty(*self.item.body, self.item.tcx).ty;
         let qualif = Q::in_call(
             self.item,
             &|l| self.qualifs_per_local.contains(l),