WIP: skip early lints

Author: Kobzol

compiler/rustc_lint/src/early.rs

@@ -380,14 +380,28 @@ pub fn check_ast_node<'a>(
     // `RuntimeCombinedEarlyLintPass`.
     let passes =
         if pre_expansion { &lint_store.pre_expansion_passes } else { &lint_store.early_passes };
-    if passes.is_empty() {
-        check_ast_node_inner(sess, tcx, check_node, context, builtin_lints);
-    } else {
+    // if passes.is_empty() {
+    // let can_skip_lints = tcx
+    //     .map(|tcx| {
+    //         let dont_need_to_run = tcx.lints_that_dont_need_to_run(());
+    //         builtin_lints.get_lints().iter().all(|l| dont_need_to_run.contains(&LintId::of(l)))
+    //     })
+    //     .unwrap_or(false);
+    // if true {
+    // !can_skip_lints {
+    // eprintln!("LINT: noskip");
+    // check_ast_node_inner(sess, tcx, check_node, context, builtin_lints);
+    // } else {
+    //     eprintln!("LINT: skip");
+    // }
+    // } else {
+    if !passes.is_empty() {
         let mut passes: Vec<_> = passes.iter().map(|mk_pass| (mk_pass)()).collect();
         passes.push(Box::new(builtin_lints));
         let pass = RuntimeCombinedEarlyLintPass { passes: &mut passes[..] };
         check_ast_node_inner(sess, tcx, check_node, context, pass);
     }
+    // }
 }
 
 fn check_ast_node_inner<'a, T: EarlyLintPass>(

compiler/rustc_lint/src/passes.rs

@@ -240,10 +240,10 @@ macro_rules! declare_combined_early_lint_pass {
         #[allow(rustc::lint_pass_impl_without_macro)]
         impl $crate::LintPass for $name {
             fn name(&self) -> &'static str {
-                panic!()
+                stringify!($name)
             }
             fn get_lints(&self) -> LintVec {
-                panic!()
+                $name::get_lints()
             }
         }
     )