lowering attribute by copying attribute from AST to HIR directly

Addresses #459

8 files changed, 46 insertions, 90 deletions

diff --git a/gcc/rust/ast/rust-ast.h b/gcc/rust/ast/rust-ast.h
index 08f29d1..3b768a6 100644
--- a/gcc/rust/ast/rust-ast.h
+++ b/gcc/rust/ast/rust-ast.h
@@ -1611,6 +1611,7 @@ public:
   }
 
   NodeId get_node_id () const { return node_id; }
+  const std::vector<Attribute> &get_inner_attrs () const { return inner_attrs; }
 };
 
 // Base path expression AST node - abstract
diff --git a/gcc/rust/hir/rust-ast-lower-block.h b/gcc/rust/hir/rust-ast-lower-block.h
index 77ca50d..b29bd14 100644
--- a/gcc/rust/hir/rust-ast-lower-block.h
+++ b/gcc/rust/hir/rust-ast-lower-block.h
@@ -142,7 +142,6 @@ public:
 
   void visit (AST::LoopExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
     HIR::BlockExpr *loop_block
       = ASTLoweringBlock::translate (expr.get_loop_block ().get (),
 				     &terminated);
@@ -158,7 +157,7 @@ public:
       = new HIR::LoopExpr (mapping,
 			   std::unique_ptr<HIR::BlockExpr> (loop_block),
 			   expr.get_locus (), std::move (loop_label),
-			   std::move (outer_attribs));
+			   expr.get_outer_attrs ());
   }
 
   void visit (AST::WhileLoopExpr &expr) override;
diff --git a/gcc/rust/hir/rust-ast-lower-expr.h b/gcc/rust/hir/rust-ast-lower-expr.h
index 0aeaf09..82d13d0 100644
--- a/gcc/rust/hir/rust-ast-lower-expr.h
+++ b/gcc/rust/hir/rust-ast-lower-expr.h
@@ -80,8 +80,6 @@ public:
 
   void visit (AST::TupleIndexExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
-
     HIR::Expr *tuple_expr
       = ASTLoweringExpr::translate (expr.get_tuple_expr ().get (), &terminated);
 
@@ -94,13 +92,11 @@ public:
       = new HIR::TupleIndexExpr (mapping,
 				 std::unique_ptr<HIR::Expr> (tuple_expr),
 				 expr.get_tuple_index (),
-				 std::move (outer_attribs), expr.get_locus ());
+				 expr.get_outer_attrs (), expr.get_locus ());
   }
 
   void visit (AST::TupleExpr &expr) override
   {
-    AST::AttrVec inner_attribs;
-    AST::AttrVec outer_attribs;
     std::vector<std::unique_ptr<HIR::Expr> > tuple_elements;
     for (auto &e : expr.get_tuple_elems ())
       {
@@ -115,8 +111,8 @@ public:
 
     translated
       = new HIR::TupleExpr (std::move (mapping), std::move (tuple_elements),
-			    std::move (inner_attribs),
-			    std::move (outer_attribs), expr.get_locus ());
+			    expr.get_inner_attrs (), expr.get_outer_attrs (),
+			    expr.get_locus ());
   }
 
   void visit (AST::IfExpr &expr) override
@@ -163,7 +159,6 @@ public:
 
   void visit (AST::CallExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
     HIR::Expr *func
       = ASTLoweringExpr::translate (expr.get_function_expr ().get ());
     std::vector<std::unique_ptr<HIR::Expr> > params;
@@ -178,16 +173,13 @@ public:
       crate_num, UNKNOWN_NODEID /* this can map back to the AST*/,
       mappings->get_next_hir_id (crate_num), UNKNOWN_LOCAL_DEFID);
 
-    translated
-      = new HIR::CallExpr (mapping, std::unique_ptr<HIR::Expr> (func),
-			   std::move (params), std::move (outer_attribs),
-			   expr.get_locus ());
+    translated = new HIR::CallExpr (mapping, std::unique_ptr<HIR::Expr> (func),
+				    std::move (params), expr.get_outer_attrs (),
+				    expr.get_locus ());
   }
 
   void visit (AST::MethodCallExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
-
     HIR::PathExprSegment method_path
       = lower_path_expr_seg (expr.get_method_name ());
 
@@ -209,7 +201,7 @@ public:
     translated
       = new HIR::MethodCallExpr (mapping, std::unique_ptr<HIR::Expr> (receiver),
 				 method_path, std::move (params),
-				 std::move (outer_attribs), expr.get_locus ());
+				 expr.get_outer_attrs (), expr.get_locus ());
   }
 
   void visit (AST::AssignmentExpr &expr) override
@@ -240,9 +232,6 @@ public:
 
   void visit (AST::ArrayExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
-    AST::AttrVec inner_attribs;
-
     expr.get_array_elems ()->accept_vis (*this);
     rust_assert (translated_array_elems != nullptr);
     HIR::ArrayElems *elems = translated_array_elems;
@@ -254,12 +243,12 @@ public:
 
     translated
       = new HIR::ArrayExpr (mapping, std::unique_ptr<HIR::ArrayElems> (elems),
-			    inner_attribs, outer_attribs, expr.get_locus ());
+			    expr.get_inner_attrs (), expr.get_outer_attrs (),
+			    expr.get_locus ());
   }
 
   void visit (AST::ArrayIndexExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
     HIR::Expr *array_expr
       = ASTLoweringExpr::translate (expr.get_array_expr ().get ());
     HIR::Expr *array_index_expr
@@ -274,7 +263,7 @@ public:
       = new HIR::ArrayIndexExpr (mapping,
 				 std::unique_ptr<HIR::Expr> (array_expr),
 				 std::unique_ptr<HIR::Expr> (array_index_expr),
-				 outer_attribs, expr.get_locus ());
+				 expr.get_outer_attrs (), expr.get_locus ());
   }
 
   void visit (AST::ArrayElemsValues &elems) override
@@ -402,8 +391,6 @@ public:
 
   void visit (AST::NegationExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
-
     HIR::Expr *negated_value
       = ASTLoweringExpr::translate (expr.get_negated_expr ().get ());
 
@@ -414,7 +401,7 @@ public:
     translated
       = new HIR::NegationExpr (mapping,
 			       std::unique_ptr<HIR::Expr> (negated_value),
-			       expr.get_expr_type (), std::move (outer_attribs),
+			       expr.get_expr_type (), expr.get_outer_attrs (),
 			       expr.get_locus ());
   }
 
@@ -482,9 +469,6 @@ public:
 
   void visit (AST::StructExprStructFields &struct_expr) override
   {
-    AST::AttrVec inner_attribs;
-    AST::AttrVec outer_attribs;
-
     // bit of a hack for now
     HIR::PathInExpression *path
       = ASTLowerPathInExpression::translate (&struct_expr.get_struct_name ());
@@ -513,18 +497,13 @@ public:
 				   mappings->get_next_hir_id (crate_num),
 				   UNKNOWN_LOCAL_DEFID);
 
-    translated
-      = new HIR::StructExprStructFields (mapping, copied_path,
-					 std::move (fields),
-					 struct_expr.get_locus (), base,
-					 inner_attribs, outer_attribs);
+    translated = new HIR::StructExprStructFields (
+      mapping, copied_path, std::move (fields), struct_expr.get_locus (), base,
+      struct_expr.get_inner_attrs (), struct_expr.get_outer_attrs ());
   }
 
   void visit (AST::GroupedExpr &expr) override
   {
-    AST::AttrVec inner_attribs;
-    AST::AttrVec outer_attribs;
-
     HIR::Expr *paren_expr
       = ASTLoweringExpr::translate (expr.get_expr_in_parens ().get ());
 
@@ -535,15 +514,12 @@ public:
 
     translated
       = new HIR::GroupedExpr (mapping, std::unique_ptr<HIR::Expr> (paren_expr),
-			      std::move (inner_attribs),
-			      std::move (outer_attribs), expr.get_locus ());
+			      expr.get_inner_attrs (), expr.get_outer_attrs (),
+			      expr.get_locus ());
   }
 
   void visit (AST::FieldAccessExpr &expr) override
   {
-    AST::AttrVec inner_attribs;
-    AST::AttrVec outer_attribs;
-
     HIR::Expr *receiver
       = ASTLoweringExpr::translate (expr.get_receiver_expr ().get ());
 
@@ -555,7 +531,7 @@ public:
       = new HIR::FieldAccessExpr (mapping,
 				  std::unique_ptr<HIR::Expr> (receiver),
 				  expr.get_field_name (),
-				  std::move (outer_attribs), expr.get_locus ());
+				  expr.get_outer_attrs (), expr.get_locus ());
   }
 
   void visit (AST::LoopExpr &expr) override
@@ -570,7 +546,6 @@ public:
 
   void visit (AST::BreakExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
     HIR::Lifetime break_label = lower_lifetime (expr.get_label ());
     HIR::Expr *break_expr
       = expr.has_break_expr ()
@@ -585,12 +560,11 @@ public:
     translated = new HIR::BreakExpr (mapping, expr.get_locus (),
 				     std ::move (break_label),
 				     std::unique_ptr<HIR::Expr> (break_expr),
-				     std::move (outer_attribs));
+				     expr.get_outer_attrs ());
   }
 
   void visit (AST::ContinueExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
     HIR::Lifetime break_label = lower_lifetime (expr.get_label ());
 
     auto crate_num = mappings->get_current_crate ();
@@ -600,13 +574,11 @@ public:
 
     translated = new HIR::ContinueExpr (mapping, expr.get_locus (),
 					std ::move (break_label),
-					std::move (outer_attribs));
+					expr.get_outer_attrs ());
   }
 
   void visit (AST::BorrowExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
-
     HIR::Expr *borrow_lvalue
       = ASTLoweringExpr::translate (expr.get_borrowed_expr ().get ());
 
@@ -619,13 +591,11 @@ public:
       = new HIR::BorrowExpr (mapping,
 			     std::unique_ptr<HIR::Expr> (borrow_lvalue),
 			     expr.get_is_mut (), expr.get_is_double_borrow (),
-			     std::move (outer_attribs), expr.get_locus ());
+			     expr.get_outer_attrs (), expr.get_locus ());
   }
 
   void visit (AST::DereferenceExpr &expr) override
   {
-    AST::AttrVec outer_attribs;
-
     HIR::Expr *dref_lvalue
       = ASTLoweringExpr::translate (expr.get_dereferenced_expr ().get ());
 
@@ -637,7 +607,7 @@ public:
     translated
       = new HIR::DereferenceExpr (mapping,
 				  std::unique_ptr<HIR::Expr> (dref_lvalue),
-				  std::move (outer_attribs), expr.get_locus ());
+				  expr.get_outer_attrs (), expr.get_locus ());
   }
 
 private:
diff --git a/gcc/rust/hir/rust-ast-lower-implitem.h b/gcc/rust/hir/rust-ast-lower-implitem.h
index 43cc256..7b88408 100644
--- a/gcc/rust/hir/rust-ast-lower-implitem.h
+++ b/gcc/rust/hir/rust-ast-lower-implitem.h
@@ -60,7 +60,6 @@ public:
 
   void visit (AST::ConstantItem &constant) override
   {
-    AST::AttrVec outer_attrs;
     HIR::Visibility vis = HIR::Visibility::create_public ();
 
     HIR::Type *type = ASTLoweringType::translate (constant.get_type ().get ());
@@ -74,7 +73,8 @@ public:
     translated = new HIR::ConstantItem (mapping, constant.get_identifier (),
 					vis, std::unique_ptr<HIR::Type> (type),
 					std::unique_ptr<HIR::Expr> (expr),
-					outer_attrs, constant.get_locus ());
+					constant.get_outer_attrs (),
+					constant.get_locus ());
 
     mappings->insert_hir_implitem (mapping.get_crate_num (),
 				   mapping.get_hirid (), parent_impl_id,
@@ -86,7 +86,6 @@ public:
   void visit (AST::Function &function) override
   {
     // ignore for now and leave empty
-    AST::AttrVec outer_attrs;
     std::vector<std::unique_ptr<HIR::WhereClauseItem> > where_clause_items;
     HIR::WhereClause where_clause (std::move (where_clause_items));
     HIR::FunctionQualifiers qualifiers (
@@ -147,7 +146,7 @@ public:
 			   std::move (qualifiers), std::move (generic_params),
 			   std::move (function_params), std::move (return_type),
 			   std::move (where_clause), std::move (function_body),
-			   std::move (vis), std::move (outer_attrs), locus);
+			   std::move (vis), function.get_outer_attrs (), locus);
 
     mappings->insert_hir_implitem (mapping.get_crate_num (),
 				   mapping.get_hirid (), parent_impl_id, fn);
@@ -169,7 +168,6 @@ public:
   void visit (AST::Method &method) override
   {
     // ignore for now and leave empty
-    AST::AttrVec outer_attrs;
     std::vector<std::unique_ptr<HIR::WhereClauseItem> > where_clause_items;
     HIR::WhereClause where_clause (std::move (where_clause_items));
     HIR::FunctionQualifiers qualifiers (
@@ -228,7 +226,7 @@ public:
 			 std::move (self_param), std::move (function_params),
 			 std::move (return_type), std::move (where_clause),
 			 std::move (method_body), std::move (vis),
-			 std::move (outer_attrs), locus);
+			 method.get_outer_attrs (), locus);
 
     mappings->insert_hir_implitem (mapping.get_crate_num (),
 				   mapping.get_hirid (), parent_impl_id, mth);
diff --git a/gcc/rust/hir/rust-ast-lower-item.h b/gcc/rust/hir/rust-ast-lower-item.h
index 10ec203..936aebb 100644
--- a/gcc/rust/hir/rust-ast-lower-item.h
+++ b/gcc/rust/hir/rust-ast-lower-item.h
@@ -58,7 +58,6 @@ public:
     std::vector<std::unique_ptr<HIR::WhereClauseItem> > where_clause_items;
     HIR::WhereClause where_clause (std::move (where_clause_items));
     HIR::Visibility vis = HIR::Visibility::create_public ();
-    AST::AttrVec outer_attrs;
 
     std::vector<std::unique_ptr<HIR::GenericParam> > generic_params;
     if (alias.has_generics ())
@@ -76,7 +75,7 @@ public:
 				     std::move (generic_params),
 				     std::move (where_clause),
 				     std::unique_ptr<HIR::Type> (existing_type),
-				     std::move (vis), std::move (outer_attrs),
+				     std::move (vis), alias.get_outer_attrs (),
 				     alias.get_locus ());
 
     mappings->insert_defid_mapping (mapping.get_defid (), translated);
@@ -98,11 +97,9 @@ public:
     std::vector<std::unique_ptr<HIR::WhereClauseItem> > where_clause_items;
     HIR::WhereClause where_clause (std::move (where_clause_items));
     HIR::Visibility vis = HIR::Visibility::create_public ();
-    AST::AttrVec outer_attrs;
 
     std::vector<HIR::TupleField> fields;
     struct_decl.iterate ([&] (AST::TupleField &field) mutable -> bool {
-      AST::AttrVec outer_attrs;
       HIR::Visibility vis = HIR::Visibility::create_public ();
       HIR::Type *type
 	= ASTLoweringType::translate (field.get_field_type ().get ());
@@ -118,7 +115,7 @@ public:
       Location field_locus;
       HIR::TupleField translated_field (mapping,
 					std::unique_ptr<HIR::Type> (type), vis,
-					field_locus, outer_attrs);
+					field_locus, field.get_outer_attrs ());
       fields.push_back (std::move (translated_field));
       return true;
     });
@@ -132,7 +129,7 @@ public:
 				       struct_decl.get_identifier (),
 				       std::move (generic_params),
 				       std::move (where_clause), vis,
-				       std::move (outer_attrs),
+				       struct_decl.get_outer_attrs (),
 				       struct_decl.get_locus ());
 
     mappings->insert_defid_mapping (mapping.get_defid (), translated);
@@ -154,12 +151,10 @@ public:
     std::vector<std::unique_ptr<HIR::WhereClauseItem> > where_clause_items;
     HIR::WhereClause where_clause (std::move (where_clause_items));
     HIR::Visibility vis = HIR::Visibility::create_public ();
-    AST::AttrVec outer_attrs;
 
     bool is_unit = struct_decl.is_unit_struct ();
     std::vector<HIR::StructField> fields;
     struct_decl.iterate ([&] (AST::StructField &field) mutable -> bool {
-      AST::AttrVec outer_attrs;
       HIR::Visibility vis = HIR::Visibility::create_public ();
       HIR::Type *type
 	= ASTLoweringType::translate (field.get_field_type ().get ());
@@ -175,7 +170,7 @@ public:
       Location field_locus;
       HIR::StructField translated_field (mapping, field.get_field_name (),
 					 std::unique_ptr<HIR::Type> (type), vis,
-					 field_locus, outer_attrs);
+					 field_locus, field.get_outer_attrs ());
       fields.push_back (std::move (translated_field));
       return true;
     });
@@ -189,7 +184,7 @@ public:
 					struct_decl.get_identifier (),
 					std::move (generic_params),
 					std::move (where_clause), is_unit, vis,
-					std::move (outer_attrs),
+					struct_decl.get_outer_attrs (),
 					struct_decl.get_locus ());
 
     mappings->insert_defid_mapping (mapping.get_defid (), translated);
@@ -201,7 +196,6 @@ public:
 
   void visit (AST::StaticItem &var) override
   {
-    AST::AttrVec outer_attrs;
     HIR::Visibility vis = HIR::Visibility::create_public ();
 
     HIR::Type *type = ASTLoweringType::translate (var.get_type ().get ());
@@ -216,7 +210,7 @@ public:
       = new HIR::StaticItem (mapping, var.get_identifier (), var.is_mutable (),
 			     std::unique_ptr<HIR::Type> (type),
 			     std::unique_ptr<HIR::Expr> (expr), vis,
-			     outer_attrs, var.get_locus ());
+			     var.get_outer_attrs (), var.get_locus ());
 
     mappings->insert_defid_mapping (mapping.get_defid (), translated);
     mappings->insert_hir_item (mapping.get_crate_num (), mapping.get_hirid (),
@@ -227,7 +221,6 @@ public:
 
   void visit (AST::ConstantItem &constant) override
   {
-    AST::AttrVec outer_attrs;
     HIR::Visibility vis = HIR::Visibility::create_public ();
 
     HIR::Type *type = ASTLoweringType::translate (constant.get_type ().get ());
@@ -241,7 +234,8 @@ public:
     translated = new HIR::ConstantItem (mapping, constant.get_identifier (),
 					vis, std::unique_ptr<HIR::Type> (type),
 					std::unique_ptr<HIR::Expr> (expr),
-					outer_attrs, constant.get_locus ());
+					constant.get_outer_attrs (),
+					constant.get_locus ());
 
     mappings->insert_defid_mapping (mapping.get_defid (), translated);
     mappings->insert_hir_item (mapping.get_crate_num (), mapping.get_hirid (),
@@ -253,7 +247,6 @@ public:
   void visit (AST::Function &function) override
   {
     // ignore for now and leave empty
-    AST::AttrVec outer_attrs;
     std::vector<std::unique_ptr<HIR::WhereClauseItem> > where_clause_items;
     HIR::WhereClause where_clause (std::move (where_clause_items));
     HIR::FunctionQualifiers qualifiers (
@@ -315,7 +308,7 @@ public:
 			   std::move (qualifiers), std::move (generic_params),
 			   std::move (function_params), std::move (return_type),
 			   std::move (where_clause), std::move (function_body),
-			   std::move (vis), std::move (outer_attrs), locus);
+			   std::move (vis), function.get_outer_attrs (), locus);
 
     mappings->insert_defid_mapping (mapping.get_defid (), translated);
     mappings->insert_hir_item (mapping.get_crate_num (), mapping.get_hirid (),
@@ -337,8 +330,6 @@ public:
 
   void visit (AST::InherentImpl &impl_block) override
   {
-    AST::AttrVec inner_attrs;
-    AST::AttrVec outer_attrs;
     std::vector<std::unique_ptr<HIR::WhereClauseItem> > where_clause_items;
 
     HIR::WhereClause where_clause (std::move (where_clause_items));
@@ -397,8 +388,8 @@ public:
       = new HIR::InherentImpl (mapping, std::move (impl_items),
 			       std::move (generic_params),
 			       std::unique_ptr<HIR::Type> (trait_type),
-			       where_clause, vis, std::move (inner_attrs),
-			       std::move (outer_attrs),
+			       where_clause, vis, impl_block.get_inner_attrs (),
+			       impl_block.get_outer_attrs (),
 			       impl_block.get_locus ());
 
     mappings->insert_defid_mapping (mapping.get_defid (), translated);
diff --git a/gcc/rust/hir/rust-ast-lower-stmt.h b/gcc/rust/hir/rust-ast-lower-stmt.h
index 0534749..b0763e6 100644
--- a/gcc/rust/hir/rust-ast-lower-stmt.h
+++ b/gcc/rust/hir/rust-ast-lower-stmt.h
@@ -86,7 +86,6 @@ public:
 
   void visit (AST::LetStmt &stmt) override
   {
-    AST::AttrVec outer_attrs;
     HIR::Pattern *variables
       = ASTLoweringPattern::translate (stmt.get_pattern ().get ());
     HIR::Type *type = stmt.has_type ()
@@ -105,7 +104,7 @@ public:
       = new HIR::LetStmt (mapping, std::unique_ptr<HIR::Pattern> (variables),
 			  std::unique_ptr<HIR::Expr> (init_expression),
 			  std::unique_ptr<HIR::Type> (type),
-			  std::move (outer_attrs), stmt.get_locus ());
+			  stmt.get_outer_attrs (), stmt.get_locus ());
     mappings->insert_location (crate_num, mapping.get_hirid (),
 			       stmt.get_locus ());
     mappings->insert_hir_stmt (crate_num, mapping.get_hirid (), translated);
diff --git a/gcc/rust/hir/rust-ast-lower.cc b/gcc/rust/hir/rust-ast-lower.cc
index b436089..c8c506c 100644
--- a/gcc/rust/hir/rust-ast-lower.cc
+++ b/gcc/rust/hir/rust-ast-lower.cc
@@ -40,7 +40,6 @@ HIR::Crate
 ASTLowering::go ()
 {
   std::vector<std::unique_ptr<HIR::Item> > items;
-  AST::AttrVec inner_attrs;
   bool has_utf8bom = false;
   bool has_shebang = false;
 
@@ -57,7 +56,7 @@ ASTLowering::go ()
 				 mappings->get_next_hir_id (crate_num),
 				 UNKNOWN_LOCAL_DEFID);
 
-  return HIR::Crate (std::move (items), std::move (inner_attrs), mapping,
+  return HIR::Crate (std::move (items), astCrate.get_inner_attrs (), mapping,
 		     has_utf8bom, has_shebang);
 }
 
@@ -65,9 +64,6 @@ ASTLowering::go ()
 void
 ASTLoweringBlock::visit (AST::BlockExpr &expr)
 {
-  AST::AttrVec inner_attribs;
-  AST::AttrVec outer_attribs;
-
   std::vector<std::unique_ptr<HIR::Stmt> > block_stmts;
   bool block_did_terminate = false;
   expr.iterate_stmts ([&] (AST::Stmt *s) mutable -> bool {
@@ -105,8 +101,8 @@ ASTLoweringBlock::visit (AST::BlockExpr &expr)
   translated
     = new HIR::BlockExpr (mapping, std::move (block_stmts),
 			  std::unique_ptr<HIR::ExprWithoutBlock> (tail_expr),
-			  tail_reachable, std::move (inner_attribs),
-			  std::move (outer_attribs), expr.get_locus ());
+			  tail_reachable, expr.get_inner_attrs (),
+			  expr.get_outer_attrs (), expr.get_locus ());
 
   terminated = block_did_terminate;
 }
@@ -240,7 +236,6 @@ ASTLowerStructExprField::visit (AST::StructExprFieldIdentifier &field)
 void
 ASTLoweringExprWithBlock::visit (AST::WhileLoopExpr &expr)
 {
-  AST::AttrVec outer_attribs;
   HIR::BlockExpr *loop_block
     = ASTLoweringBlock::translate (expr.get_loop_block ().get (), &terminated);
 
@@ -259,7 +254,7 @@ ASTLoweringExprWithBlock::visit (AST::WhileLoopExpr &expr)
 			      std::unique_ptr<HIR::Expr> (loop_condition),
 			      std::unique_ptr<HIR::BlockExpr> (loop_block),
 			      expr.get_locus (), std::move (loop_label),
-			      std::move (outer_attribs));
+			      expr.get_outer_attrs ());
 }
 
 // rust-ast-lower-expr.h
diff --git a/gcc/rust/hir/tree/rust-hir.h b/gcc/rust/hir/tree/rust-hir.h
index decf0c9..0bc8a54 100644
--- a/gcc/rust/hir/tree/rust-hir.h
+++ b/gcc/rust/hir/tree/rust-hir.h
@@ -290,6 +290,9 @@ public:
 
   virtual void accept_vis (HIRVisitor &vis ATTRIBUTE_UNUSED) {}
 
+  AST::AttrVec &get_outer_attrs () { return outer_attrs; }
+  const AST::AttrVec &get_outer_attrs () const { return outer_attrs; }
+
 protected:
   // Constructor
   Item (Analysis::NodeMapping mappings,