Pass a `Symbol` to `check_name`, `emit_feature_err`, and related functions.

2 files changed, 6 insertions, 6 deletions

diff --git a/src/librustc_codegen_ssa/back/write.rs b/src/librustc_codegen_ssa/back/write.rs
index 576bcc8f38e..204ca59efc8 100644
--- a/src/librustc_codegen_ssa/back/write.rs
+++ b/src/librustc_codegen_ssa/back/write.rs
@@ -28,7 +28,7 @@ use rustc_target::spec::MergeFunctions;
 use syntax::attr;
 use syntax::ext::hygiene::Mark;
 use syntax_pos::MultiSpan;
-use syntax_pos::symbol::Symbol;
+use syntax_pos::symbol::{Symbol, sym};
 use jobserver::{Client, Acquired};
 
 use std::any::Any;
@@ -382,9 +382,9 @@ pub fn start_async_codegen<B: ExtraBackendMethods>(
     let sess = tcx.sess;
     let crate_name = tcx.crate_name(LOCAL_CRATE);
     let crate_hash = tcx.crate_hash(LOCAL_CRATE);
-    let no_builtins = attr::contains_name(&tcx.hir().krate().attrs, "no_builtins");
+    let no_builtins = attr::contains_name(&tcx.hir().krate().attrs, sym::no_builtins);
     let subsystem = attr::first_attr_value_str_by_name(&tcx.hir().krate().attrs,
-                                                       "windows_subsystem");
+                                                       sym::windows_subsystem);
     let windows_subsystem = subsystem.map(|subsystem| {
         if subsystem != "windows" && subsystem != "console" {
             tcx.sess.fatal(&format!("invalid windows subsystem `{}`, only \
diff --git a/src/librustc_codegen_ssa/mir/rvalue.rs b/src/librustc_codegen_ssa/mir/rvalue.rs
index 8d3e64c1aa6..586db5cfabe 100644
--- a/src/librustc_codegen_ssa/mir/rvalue.rs
+++ b/src/librustc_codegen_ssa/mir/rvalue.rs
@@ -5,6 +5,7 @@ use rustc::mir;
 use rustc::middle::lang_items::ExchangeMallocFnLangItem;
 use rustc_apfloat::{ieee, Float, Status, Round};
 use std::{u128, i128};
+use syntax::symbol::sym;
 
 use crate::base;
 use crate::MemFlags;
@@ -181,9 +182,8 @@ impl<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                     mir::CastKind::Pointer(PointerCast::ReifyFnPointer) => {
                         match operand.layout.ty.sty {
                             ty::FnDef(def_id, substs) => {
-                                if bx.cx().tcx().has_attr(def_id, "rustc_args_required_const") {
-                                    bug!("reifying a fn ptr that requires \
-                                          const arguments");
+                                if bx.cx().tcx().has_attr(def_id, sym::rustc_args_required_const) {
+                                    bug!("reifying a fn ptr that requires const arguments");
                                 }
                                 OperandValue::Immediate(
                                     callee::resolve_and_get_fn(bx.cx(), def_id, substs))