Auto merge of #111371 - compiler-errors:revert-110907, r=petrochenkov

Revert "Populate effective visibilities in `rustc_privacy`"

This reverts commit cff85f2, cc #110907. It needs to be fixed, but there are too many issues being reported that I wanted to put up a revert until a proper fix can be committed.

Fixes a ton of issues where private but still reachable impls were missing during codegen:
Fixes #111320
Fixes #111321
Fixes #111334
Fixes #111357
Fixes #111368
Fixes #111373
Fixes #111377
Fixes #111386
Fixes #111387

`@bors` p=1

r? `@petrochenkov`

compiler/rustc_middle/src/middle/privacy.rs

@@ -64,26 +64,14 @@ impl EffectiveVisibility {
         self.at_level(level).is_public()
     }
 
-    pub const fn from_vis(vis: Visibility) -> EffectiveVisibility {
+    pub fn from_vis(vis: Visibility) -> EffectiveVisibility {
         EffectiveVisibility {
             direct: vis,
             reexported: vis,
             reachable: vis,
             reachable_through_impl_trait: vis,
         }
     }
-
-    #[must_use]
-    pub fn min(mut self, lhs: EffectiveVisibility, tcx: TyCtxt<'_>) -> Self {
-        for l in Level::all_levels() {
-            let rhs_vis = self.at_level_mut(l);
-            let lhs_vis = *lhs.at_level(l);
-            if rhs_vis.is_at_least(lhs_vis, tcx) {
-                *rhs_vis = lhs_vis;
-            };
-        }
-        self
-    }
 }
 
 /// Holds a map of effective visibilities for reachable HIR nodes.
@@ -149,6 +137,24 @@ impl EffectiveVisibilities {
         };
     }
 
+    pub fn set_public_at_level(
+        &mut self,
+        id: LocalDefId,
+        lazy_private_vis: impl FnOnce() -> Visibility,
+        level: Level,
+    ) {
+        let mut effective_vis = self
+            .effective_vis(id)
+            .copied()
+            .unwrap_or_else(|| EffectiveVisibility::from_vis(lazy_private_vis()));
+        for l in Level::all_levels() {
+            if l <= level {
+                *effective_vis.at_level_mut(l) = Visibility::Public;
+            }
+        }
+        self.map.insert(id, effective_vis);
+    }
+
     pub fn check_invariants(&self, tcx: TyCtxt<'_>, early: bool) {
         if !cfg!(debug_assertions) {
             return;
@@ -213,7 +219,7 @@ impl<Id: Eq + Hash> EffectiveVisibilities<Id> {
     pub fn update(
         &mut self,
         id: Id,
-        nominal_vis: Option<Visibility>,
+        nominal_vis: Visibility,
         lazy_private_vis: impl FnOnce() -> Visibility,
         inherited_effective_vis: EffectiveVisibility,
         level: Level,
@@ -237,11 +243,12 @@ impl<Id: Eq + Hash> EffectiveVisibilities<Id> {
                 if !(inherited_effective_vis_at_prev_level == inherited_effective_vis_at_level
                     && level != l)
                 {
-                    calculated_effective_vis = if let Some(nominal_vis) = nominal_vis && !nominal_vis.is_at_least(inherited_effective_vis_at_level, tcx) {
-                        nominal_vis
-                    } else {
-                        inherited_effective_vis_at_level
-                    }
+                    calculated_effective_vis =
+                        if nominal_vis.is_at_least(inherited_effective_vis_at_level, tcx) {
+                            inherited_effective_vis_at_level
+                        } else {
+                            nominal_vis
+                        };
                 }
                 // effective visibility can't be decreased at next update call for the
                 // same id