Use more autoderef in rustc_driver

Author: jonas-schievink

src/librustc_driver/driver.rs

@@ -567,7 +567,7 @@ pub fn phase_2_configure_and_expand(sess: &Session,
 
     // Lint plugins are registered; now we can process command line flags.
     if sess.opts.describe_lints {
-        super::describe_lints(&*sess.lint_store.borrow(), true);
+        super::describe_lints(&sess.lint_store.borrow(), true);
         return Err(0);
     }
     try!(sess.track_errors(|| sess.lint_store.borrow_mut().process_command_line(sess)));

src/librustc_driver/lib.rs

@@ -1018,7 +1018,7 @@ pub fn diagnostics_registry() -> diagnostics::registry::Registry {
     all_errors.extend_from_slice(&rustc_privacy::DIAGNOSTICS);
     all_errors.extend_from_slice(&rustc_trans::DIAGNOSTICS);
 
-    Registry::new(&*all_errors)
+    Registry::new(&all_errors)
 }
 
 pub fn main() {

src/librustc_driver/pretty.rs

@@ -870,8 +870,8 @@ fn print_flowgraph<W: Write>(variants: Vec<borrowck_dot::Variant>,
                              mut out: W)
                              -> io::Result<()> {
     let cfg = match code {
-        blocks::BlockCode(block) => cfg::CFG::new(tcx, &*block),
-        blocks::FnLikeCode(fn_like) => cfg::CFG::new(tcx, &*fn_like.body()),
+        blocks::BlockCode(block) => cfg::CFG::new(tcx, &block),
+        blocks::FnLikeCode(fn_like) => cfg::CFG::new(tcx, &fn_like.body()),
     };
     let labelled_edges = mode != PpFlowGraphMode::UnlabelledEdges;
     let lcfg = LabelledCFG {