Remove host_hash from CrateLocator

Author: bjorn3

compiler/rustc_metadata/src/creader.rs

@@ -450,6 +450,7 @@ impl<'a> CrateLoader<'a> {
         &self,
         locator: &mut CrateLocator<'b>,
         path_kind: PathKind,
+        host_hash: Option<Svh>,
     ) -> Result<Option<(LoadResult, Option<Library>)>, CrateError>
     where
         'a: 'b,
@@ -471,7 +472,7 @@ impl<'a> CrateLoader<'a> {
                 Some(LoadResult::Loaded(library)) => Some(LoadResult::Loaded(library)),
                 None => return Ok(None),
             };
-            locator.hash = locator.host_hash;
+            locator.hash = host_hash;
             // Use the locator when looking for the host proc macro crate, as that is required
             // so we want it to affect the error message
             (locator, result)
@@ -551,7 +552,6 @@ impl<'a> CrateLoader<'a> {
                 &*self.metadata_loader,
                 name,
                 hash,
-                host_hash,
                 extra_filename,
                 false, // is_host
                 path_kind,
@@ -562,7 +562,7 @@ impl<'a> CrateLoader<'a> {
                 Some(res) => (res, None),
                 None => {
                     dep_kind = CrateDepKind::MacrosOnly;
-                    match self.load_proc_macro(&mut locator, path_kind)? {
+                    match self.load_proc_macro(&mut locator, path_kind, host_hash)? {
                         Some(res) => res,
                         None => return Err(locator.into_error()),
                     }

compiler/rustc_metadata/src/locator.rs

@@ -248,7 +248,6 @@ crate struct CrateLocator<'a> {
     crate_name: Symbol,
     exact_paths: Vec<CanonicalizedPath>,
     pub hash: Option<Svh>,
-    pub host_hash: Option<Svh>,
     extra_filename: Option<&'a str>,
     pub target: &'a Target,
     pub triple: TargetTriple,
@@ -299,7 +298,6 @@ impl<'a> CrateLocator<'a> {
         metadata_loader: &'a dyn MetadataLoader,
         crate_name: Symbol,
         hash: Option<Svh>,
-        host_hash: Option<Svh>,
         extra_filename: Option<&'a str>,
         is_host: bool,
         path_kind: PathKind,
@@ -334,7 +332,6 @@ impl<'a> CrateLocator<'a> {
                 Vec::new()
             },
             hash,
-            host_hash,
             extra_filename,
             target: if is_host { &sess.host } else { &sess.target },
             triple: if is_host {
@@ -807,7 +804,6 @@ fn find_plugin_registrar_impl<'a>(
         metadata_loader,
         name,
         None, // hash
-        None, // host_hash
         None, // extra_filename
         true, // is_host
         PathKind::Crate,