Mark more spans as relative.

compiler/rustc_ast/src/mut_visit.rs

@@ -396,8 +396,10 @@ pub fn visit_attr_args<T: MutVisitor>(args: &mut AttrArgs, vis: &mut T) {
             vis.visit_span(eq_span);
             vis.visit_expr(expr);
         }
-        AttrArgs::Eq(_, AttrArgsEq::Hir(lit)) => {
-            unreachable!("in literal form when visiting mac args eq: {:?}", lit)
+        AttrArgs::Eq(eq_span, AttrArgsEq::Hir(lit)) => {
+            vis.visit_span(eq_span);
+            let MetaItemLit { symbol: _, suffix: _, kind: _, span } = lit;
+            vis.visit_span(span);
         }
     }
 }

compiler/rustc_ast/src/visit.rs

@@ -206,8 +206,14 @@ pub trait Visitor<'ast>: Sized {
     fn visit_path(&mut self, path: &'ast Path, _id: NodeId) {
         walk_path(self, path)
     }
-    fn visit_use_tree(&mut self, use_tree: &'ast UseTree, id: NodeId, _nested: bool) {
-        walk_use_tree(self, use_tree, id)
+    fn visit_use_tree(
+        &mut self,
+        use_tree: &'ast UseTree,
+        id: NodeId,
+        _nested: bool,
+        item_span: Span,
+    ) {
+        walk_use_tree(self, use_tree, id, item_span)
     }
     fn visit_path_segment(&mut self, path_segment: &'ast PathSegment) {
         walk_path_segment(self, path_segment)
@@ -307,7 +313,7 @@ pub fn walk_item<'a, V: Visitor<'a>>(visitor: &mut V, item: &'a Item) {
     visitor.visit_ident(item.ident);
     match &item.kind {
         ItemKind::ExternCrate(_) => {}
-        ItemKind::Use(use_tree) => visitor.visit_use_tree(use_tree, item.id, false),
+        ItemKind::Use(use_tree) => visitor.visit_use_tree(use_tree, item.id, false, item.span),
         ItemKind::Static(box StaticItem { ty, mutability: _, expr }) => {
             visitor.visit_ty(ty);
             walk_list!(visitor, visit_expr, expr);
@@ -450,7 +456,12 @@ pub fn walk_path<'a, V: Visitor<'a>>(visitor: &mut V, path: &'a Path) {
     }
 }
 
-pub fn walk_use_tree<'a, V: Visitor<'a>>(visitor: &mut V, use_tree: &'a UseTree, id: NodeId) {
+pub fn walk_use_tree<'a, V: Visitor<'a>>(
+    visitor: &mut V,
+    use_tree: &'a UseTree,
+    id: NodeId,
+    item_span: Span,
+) {
     visitor.visit_path(&use_tree.prefix, id);
     match &use_tree.kind {
         UseTreeKind::Simple(rename) => {
@@ -462,7 +473,7 @@ pub fn walk_use_tree<'a, V: Visitor<'a>>(visitor: &mut V, use_tree: &'a UseTree,
         UseTreeKind::Glob => {}
         UseTreeKind::Nested(use_trees) => {
             for &(ref nested_tree, nested_id) in use_trees {
-                visitor.visit_use_tree(nested_tree, nested_id, true);
+                visitor.visit_use_tree(nested_tree, nested_id, true, item_span);
             }
         }
     }

compiler/rustc_ast_lowering/src/lib.rs

@@ -902,8 +902,20 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
             })),
             AttrKind::DocComment(comment_kind, data) => AttrKind::DocComment(comment_kind, data),
         };
+        let mut attr = Attribute { kind, id: attr.id, style: attr.style, span: attr.span };
 
-        Attribute { kind, id: attr.id, style: attr.style, span: self.lower_span(attr.span) }
+        use rustc_ast::mut_visit::MutVisitor;
+        struct SpanMarker<'ctx, 'res, 'hir> {
+            lctx: &'ctx LoweringContext<'res, 'hir>,
+        }
+        impl MutVisitor for SpanMarker<'_, '_, '_> {
+            fn visit_span(&mut self, span: &mut Span) {
+                *span = self.lctx.lower_span(*span);
+            }
+        }
+        SpanMarker { lctx: self }.visit_attribute(&mut attr);
+
+        attr
     }
 
     fn alias_attrs(&mut self, id: hir::HirId, target_id: hir::HirId) {

compiler/rustc_ast_passes/src/node_count.rs

@@ -111,9 +111,9 @@ impl<'ast> Visitor<'ast> for NodeCounter {
         self.count += 1;
         walk_path(self, path)
     }
-    fn visit_use_tree(&mut self, use_tree: &UseTree, id: NodeId, _nested: bool) {
+    fn visit_use_tree(&mut self, use_tree: &UseTree, id: NodeId, _nested: bool, item_span: Span) {
         self.count += 1;
-        walk_use_tree(self, use_tree, id)
+        walk_use_tree(self, use_tree, id, item_span)
     }
     fn visit_generic_args(&mut self, generic_args: &GenericArgs) {
         self.count += 1;

compiler/rustc_resolve/src/check_unused.rs

@@ -165,7 +165,13 @@ impl<'a, 'b, 'tcx> Visitor<'a> for UnusedImportCheckVisitor<'a, 'b, 'tcx> {
         visit::walk_item(self, item);
     }
 
-    fn visit_use_tree(&mut self, use_tree: &'a ast::UseTree, id: ast::NodeId, nested: bool) {
+    fn visit_use_tree(
+        &mut self,
+        use_tree: &'a ast::UseTree,
+        id: ast::NodeId,
+        nested: bool,
+        item_span: Span,
+    ) {
         // Use the base UseTree's NodeId as the item id
         // This allows the grouping of all the lints in the same item
         if !nested {
@@ -186,7 +192,7 @@ impl<'a, 'b, 'tcx> Visitor<'a> for UnusedImportCheckVisitor<'a, 'b, 'tcx> {
             self.check_import(id);
         }
 
-        visit::walk_use_tree(self, use_tree, id);
+        visit::walk_use_tree(self, use_tree, id, item_span);
     }
 }
 

compiler/rustc_resolve/src/def_collector.rs

@@ -156,9 +156,15 @@ impl<'a, 'b, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'b, 'tcx> {
         visit::walk_fn(self, fn_kind);
     }
 
-    fn visit_use_tree(&mut self, use_tree: &'a UseTree, id: NodeId, _nested: bool) {
-        self.create_def(id, DefPathData::Use, use_tree.span);
-        visit::walk_use_tree(self, use_tree, id);
+    fn visit_use_tree(
+        &mut self,
+        use_tree: &'a UseTree,
+        id: NodeId,
+        _nested: bool,
+        item_span: Span,
+    ) {
+        self.create_def(id, DefPathData::Use, item_span);
+        visit::walk_use_tree(self, use_tree, id, item_span);
     }
 
     fn visit_foreign_item(&mut self, foreign_item: &'a ForeignItem) {