Reduce visibilities, and add `warn(unreachable_pub)`.

Lots of unnecessary `pub`s in this crate. Most are downgraded to
`pub(super)`, though some don't need any visibility.

1 files changed, 2 insertions, 2 deletions

diff --git a/compiler/rustc_mir_transform/src/required_consts.rs b/compiler/rustc_mir_transform/src/required_consts.rs
index 50637e2ac03..ebcf5b5d27b 100644
--- a/compiler/rustc_mir_transform/src/required_consts.rs
+++ b/compiler/rustc_mir_transform/src/required_consts.rs
@@ -1,7 +1,7 @@
 use rustc_middle::mir::visit::Visitor;
 use rustc_middle::mir::{traversal, Body, ConstOperand, Location};
 
-pub struct RequiredConstsVisitor<'a, 'tcx> {
+pub(super) struct RequiredConstsVisitor<'a, 'tcx> {
     required_consts: &'a mut Vec<ConstOperand<'tcx>>,
 }
 
@@ -10,7 +10,7 @@ impl<'a, 'tcx> RequiredConstsVisitor<'a, 'tcx> {
         RequiredConstsVisitor { required_consts }
     }
 
-    pub fn compute_required_consts(body: &mut Body<'tcx>) {
+    pub(super) fn compute_required_consts(body: &mut Body<'tcx>) {
         let mut required_consts = Vec::new();
         let mut required_consts_visitor = RequiredConstsVisitor::new(&mut required_consts);
         for (bb, bb_data) in traversal::reverse_postorder(&body) {