Remove some unnecessary `ATTR_*` constants.

src/librustc/ich/mod.rs

@@ -12,21 +12,13 @@ mod impls_hir;
 mod impls_ty;
 mod impls_syntax;
 
-pub const ATTR_DIRTY: Symbol = sym::rustc_dirty;
-pub const ATTR_CLEAN: Symbol = sym::rustc_clean;
-pub const ATTR_IF_THIS_CHANGED: Symbol = sym::rustc_if_this_changed;
-pub const ATTR_THEN_THIS_WOULD_NEED: Symbol = sym::rustc_then_this_would_need;
-pub const ATTR_PARTITION_REUSED: Symbol = sym::rustc_partition_reused;
-pub const ATTR_PARTITION_CODEGENED: Symbol = sym::rustc_partition_codegened;
-pub const ATTR_EXPECTED_CGU_REUSE: Symbol = sym::rustc_expected_cgu_reuse;
-
 pub const IGNORED_ATTRIBUTES: &[Symbol] = &[
     sym::cfg,
-    ATTR_IF_THIS_CHANGED,
-    ATTR_THEN_THIS_WOULD_NEED,
-    ATTR_DIRTY,
-    ATTR_CLEAN,
-    ATTR_PARTITION_REUSED,
-    ATTR_PARTITION_CODEGENED,
-    ATTR_EXPECTED_CGU_REUSE,
+    sym::rustc_if_this_changed,
+    sym::rustc_then_this_would_need,
+    sym::rustc_dirty,
+    sym::rustc_clean,
+    sym::rustc_partition_reused,
+    sym::rustc_partition_codegened,
+    sym::rustc_expected_cgu_reuse,
 ];

src/librustc_incremental/assert_dep_graph.rs

@@ -44,11 +44,10 @@ use rustc_data_structures::graph::implementation::{
 };
 use rustc::hir;
 use rustc::hir::intravisit::{self, NestedVisitorMap, Visitor};
-use rustc::ich::{ATTR_IF_THIS_CHANGED, ATTR_THEN_THIS_WOULD_NEED};
 use std::env;
 use std::fs::{self, File};
 use std::io::Write;
-use syntax::ast;
+use syntax::{ast, symbol::sym};
 use syntax_pos::Span;
 
 pub fn assert_dep_graph(tcx: TyCtxt<'_>) {
@@ -78,7 +77,7 @@ pub fn assert_dep_graph(tcx: TyCtxt<'_>) {
             assert!(tcx.sess.opts.debugging_opts.query_dep_graph,
                     "cannot use the `#[{}]` or `#[{}]` annotations \
                     without supplying `-Z query-dep-graph`",
-                    ATTR_IF_THIS_CHANGED, ATTR_THEN_THIS_WOULD_NEED);
+                    sym::rustc_if_this_changed, sym::rustc_then_this_would_need);
         }
 
         // Check paths.
@@ -114,7 +113,7 @@ impl IfThisChanged<'tcx> {
         let def_id = self.tcx.hir().local_def_id(hir_id);
         let def_path_hash = self.tcx.def_path_hash(def_id);
         for attr in attrs {
-            if attr.check_name(ATTR_IF_THIS_CHANGED) {
+            if attr.check_name(sym::rustc_if_this_changed) {
                 let dep_node_interned = self.argument(attr);
                 let dep_node = match dep_node_interned {
                     None => def_path_hash.to_dep_node(DepKind::Hir),
@@ -130,7 +129,7 @@ impl IfThisChanged<'tcx> {
                     }
                 };
                 self.if_this_changed.push((attr.span, def_id, dep_node));
-            } else if attr.check_name(ATTR_THEN_THIS_WOULD_NEED) {
+            } else if attr.check_name(sym::rustc_then_this_would_need) {
                 let dep_node_interned = self.argument(attr);
                 let dep_node = match dep_node_interned {
                     Some(n) => {

src/librustc_incremental/assert_module_sources.rs

@@ -28,8 +28,6 @@ use rustc::ty::TyCtxt;
 use std::collections::BTreeSet;
 use syntax::ast;
 use syntax::symbol::{Symbol, sym};
-use rustc::ich::{ATTR_PARTITION_REUSED, ATTR_PARTITION_CODEGENED,
-                 ATTR_EXPECTED_CGU_REUSE};
 
 pub fn assert_module_sources(tcx: TyCtxt<'_>) {
     tcx.dep_graph.with_ignore(|| {
@@ -62,11 +60,11 @@ struct AssertModuleSource<'tcx> {
 
 impl AssertModuleSource<'tcx> {
     fn check_attr(&self, attr: &ast::Attribute) {
-        let (expected_reuse, comp_kind) = if attr.check_name(ATTR_PARTITION_REUSED) {
+        let (expected_reuse, comp_kind) = if attr.check_name(sym::rustc_partition_reused) {
             (CguReuse::PreLto, ComparisonKind::AtLeast)
-        } else if attr.check_name(ATTR_PARTITION_CODEGENED) {
+        } else if attr.check_name(sym::rustc_partition_codegened) {
             (CguReuse::No, ComparisonKind::Exact)
-        } else if attr.check_name(ATTR_EXPECTED_CGU_REUSE) {
+        } else if attr.check_name(sym::rustc_expected_cgu_reuse) {
             match &*self.field(attr, sym::kind).as_str() {
                 "no" => (CguReuse::No, ComparisonKind::Exact),
                 "pre-lto" => (CguReuse::PreLto, ComparisonKind::Exact),

src/librustc_incremental/persist/dirty_clean.rs

@@ -22,7 +22,6 @@ use rustc::hir::Node as HirNode;
 use rustc::hir::def_id::DefId;
 use rustc::hir::itemlikevisit::ItemLikeVisitor;
 use rustc::hir::intravisit;
-use rustc::ich::{ATTR_DIRTY, ATTR_CLEAN};
 use rustc::ty::TyCtxt;
 use rustc_data_structures::fingerprint::Fingerprint;
 use rustc_data_structures::fx::FxHashSet;
@@ -224,7 +223,7 @@ pub fn check_dirty_clean_annotations(tcx: TyCtxt<'_>) {
 
         let mut all_attrs = FindAllAttrs {
             tcx,
-            attr_names: vec![ATTR_DIRTY, ATTR_CLEAN],
+            attr_names: vec![sym::rustc_dirty, sym::rustc_clean],
             found_attrs: vec![],
         };
         intravisit::walk_crate(&mut all_attrs, krate);
@@ -246,9 +245,9 @@ impl DirtyCleanVisitor<'tcx> {
     fn assertion_maybe(&mut self, item_id: hir::HirId, attr: &Attribute)
         -> Option<Assertion>
     {
-        let is_clean = if attr.check_name(ATTR_DIRTY) {
+        let is_clean = if attr.check_name(sym::rustc_dirty) {
             false
-        } else if attr.check_name(ATTR_CLEAN) {
+        } else if attr.check_name(sym::rustc_clean) {
             true
         } else {
             // skip: not rustc_clean/dirty