Don't include DefIndex in plugin- and proc-macro registrar fn symbol.

src/librustc/session/mod.rs

@@ -11,7 +11,7 @@
 pub use self::code_stats::{CodeStats, DataTypeKind, FieldInfo};
 pub use self::code_stats::{SizeKind, TypeSizeInfo, VariantInfo};
 
-use hir::def_id::{CrateNum, DefIndex};
+use hir::def_id::CrateNum;
 use ich::Fingerprint;
 
 use lint;
@@ -558,18 +558,16 @@ impl Session {
 
     /// Returns the symbol name for the registrar function,
     /// given the crate Svh and the function DefIndex.
-    pub fn generate_plugin_registrar_symbol(&self, disambiguator: CrateDisambiguator,
+    pub fn generate_plugin_registrar_symbol(&self,
-                                            index: DefIndex)
+                                            disambiguator: CrateDisambiguator)
                                             -> String {
-        format!("__rustc_plugin_registrar__{}_{}", disambiguator.to_fingerprint().to_hex(),
+        format!("__rustc_plugin_registrar_{}__", disambiguator.to_fingerprint().to_hex())
-                                                   index.to_proc_macro_index())
     }
 
-    pub fn generate_derive_registrar_symbol(&self, disambiguator: CrateDisambiguator,
+    pub fn generate_derive_registrar_symbol(&self,
-                                            index: DefIndex)
+                                            disambiguator: CrateDisambiguator)
                                             -> String {
-        format!("__rustc_derive_registrar__{}_{}", disambiguator.to_fingerprint().to_hex(),
+        format!("__rustc_derive_registrar_{}__", disambiguator.to_fingerprint().to_hex())
-                                                   index.to_proc_macro_index())
     }
 
     pub fn sysroot<'a>(&'a self) -> &'a Path {

src/librustc_metadata/creader.rs

@@ -15,7 +15,7 @@ use locator::{self, CratePaths};
 use native_libs::relevant_lib;
 use schema::CrateRoot;
 
-use rustc::hir::def_id::{CrateNum, DefIndex, CRATE_DEF_INDEX};
+use rustc::hir::def_id::{CrateNum, CRATE_DEF_INDEX};
 use rustc::hir::svh::Svh;
 use rustc::middle::allocator::AllocatorKind;
 use rustc::middle::cstore::DepKind;
@@ -532,8 +532,7 @@ impl<'a> CrateLoader<'a> {
             Err(err) => self.sess.span_fatal(span, &err),
         };
 
-        let sym = self.sess.generate_derive_registrar_symbol(root.disambiguator,
+        let sym = self.sess.generate_derive_registrar_symbol(root.disambiguator);
-                                                             root.macro_derive_registrar.unwrap());
         let registrar = unsafe {
             let sym = match lib.symbol(&sym) {
                 Ok(f) => f,
@@ -588,7 +587,7 @@ impl<'a> CrateLoader<'a> {
     pub fn find_plugin_registrar(&mut self,
                                  span: Span,
                                  name: &str)
-                                 -> Option<(PathBuf, CrateDisambiguator, DefIndex)> {
+                                 -> Option<(PathBuf, CrateDisambiguator)> {
         let name = Symbol::intern(name);
         let ekrate = self.read_extension_crate(span, name, name);
 
@@ -603,11 +602,11 @@ impl<'a> CrateLoader<'a> {
         }
 
         let root = ekrate.metadata.get_root();
-        match (ekrate.dylib.as_ref(), root.plugin_registrar_fn) {
+        match ekrate.dylib.as_ref() {
-            (Some(dylib), Some(reg)) => {
+            Some(dylib) => {
-                Some((dylib.to_path_buf(), root.disambiguator, reg))
+                Some((dylib.to_path_buf(), root.disambiguator))
             }
-            (None, Some(_)) => {
+            None => {
                 span_err!(self.sess, span, E0457,
                           "plugin `{}` only found in rlib format, but must be available \
                            in dylib format",
@@ -616,7 +615,6 @@ impl<'a> CrateLoader<'a> {
                 // empty dylib.
                 None
             }
-            _ => None,
         }
     }
 

src/librustc_plugin/load.rs

@@ -100,8 +100,8 @@ impl<'a> PluginLoader<'a> {
     fn load_plugin(&mut self, span: Span, name: &str, args: Vec<ast::NestedMetaItem>) {
         let registrar = self.reader.find_plugin_registrar(span, name);
 
-        if let Some((lib, disambiguator, index)) = registrar {
+        if let Some((lib, disambiguator)) = registrar {
-            let symbol = self.sess.generate_plugin_registrar_symbol(disambiguator, index);
+            let symbol = self.sess.generate_plugin_registrar_symbol(disambiguator);
             let fun = self.dylink_registrar(span, lib, symbol);
             self.plugins.push(PluginRegistrar {
                 fun,

src/librustc_trans/back/symbol_export.rs

@@ -115,9 +115,8 @@ pub fn provide(providers: &mut Providers) {
 
         if let Some(id) = tcx.sess.derive_registrar_fn.get() {
             let def_id = tcx.hir.local_def_id(id);
-            let idx = def_id.index;
             let disambiguator = tcx.sess.local_crate_disambiguator();
-            let registrar = tcx.sess.generate_derive_registrar_symbol(disambiguator, idx);
+            let registrar = tcx.sess.generate_derive_registrar_symbol(disambiguator);
             local_crate.push((registrar, Some(def_id), SymbolExportLevel::C));
         }
 

src/librustc_trans/back/symbol_names.rs

@@ -257,14 +257,12 @@ fn compute_symbol_name<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>, instance: Instance
 
     if let Some(id) = node_id {
         if tcx.sess.plugin_registrar_fn.get() == Some(id) {
-            let idx = def_id.index;
             let disambiguator = tcx.sess.local_crate_disambiguator();
-            return tcx.sess.generate_plugin_registrar_symbol(disambiguator, idx);
+            return tcx.sess.generate_plugin_registrar_symbol(disambiguator);
         }
         if tcx.sess.derive_registrar_fn.get() == Some(id) {
-            let idx = def_id.index;
             let disambiguator = tcx.sess.local_crate_disambiguator();
-            return tcx.sess.generate_derive_registrar_symbol(disambiguator, idx);
+            return tcx.sess.generate_derive_registrar_symbol(disambiguator);
         }
     }