trans: remove item_symbols from metadata and CrateContext.

src/librustc/middle/cstore.rs

@@ -34,8 +34,7 @@ use mir::mir_map::MirMap;
 use session::Session;
 use session::config::PanicStrategy;
 use session::search_paths::PathKind;
-use util::nodemap::{FnvHashMap, NodeMap, NodeSet, DefIdMap};
-use std::cell::RefCell;
+use util::nodemap::{FnvHashMap, NodeSet, DefIdMap};
 use std::rc::Rc;
 use std::path::PathBuf;
 use syntax::ast;
@@ -169,7 +168,6 @@ pub trait CrateStore<'tcx> {
     fn item_super_predicates<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
                                  -> ty::GenericPredicates<'tcx>;
     fn item_attrs(&self, def_id: DefId) -> Vec<ast::Attribute>;
-    fn item_symbol(&self, def: DefId) -> String;
     fn trait_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)-> ty::TraitDef<'tcx>;
     fn adt_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId) -> ty::AdtDefMaster<'tcx>;
     fn method_arg_names(&self, did: DefId) -> Vec<String>;
@@ -275,7 +273,6 @@ pub trait CrateStore<'tcx> {
     fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<ast::CrateNum>;
     fn encode_metadata<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>,
                            reexports: &def::ExportMap,
-                           item_symbols: &RefCell<NodeMap<String>>,
                            link_meta: &LinkMeta,
                            reachable: &NodeSet,
                            mir_map: &MirMap<'tcx>,
@@ -353,7 +350,6 @@ impl<'tcx> CrateStore<'tcx> for DummyCrateStore {
     fn item_super_predicates<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)
                                  -> ty::GenericPredicates<'tcx> { bug!("item_super_predicates") }
     fn item_attrs(&self, def_id: DefId) -> Vec<ast::Attribute> { bug!("item_attrs") }
-    fn item_symbol(&self, def: DefId) -> String { bug!("item_symbol") }
     fn trait_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId)-> ty::TraitDef<'tcx>
         { bug!("trait_def") }
     fn adt_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId) -> ty::AdtDefMaster<'tcx>
@@ -483,7 +479,6 @@ impl<'tcx> CrateStore<'tcx> for DummyCrateStore {
     fn extern_mod_stmt_cnum(&self, emod_id: ast::NodeId) -> Option<ast::CrateNum> { None }
     fn encode_metadata<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>,
                            reexports: &def::ExportMap,
-                           item_symbols: &RefCell<NodeMap<String>>,
                            link_meta: &LinkMeta,
                            reachable: &NodeSet,
                            mir_map: &MirMap<'tcx>,

src/librustc_metadata/common.rs

@@ -33,7 +33,7 @@ pub const tag_items_data_item_family: usize = 0x24;
 
 pub const tag_items_data_item_type: usize = 0x25;
 
-pub const tag_items_data_item_symbol: usize = 0x26;
+// GAP 0x26
 
 pub const tag_items_data_item_variant: usize = 0x27;
 

src/librustc_metadata/csearch.rs

@@ -25,7 +25,7 @@ use rustc::hir::map as hir_map;
 use rustc::hir::map::DefKey;
 use rustc::mir::repr::Mir;
 use rustc::mir::mir_map::MirMap;
-use rustc::util::nodemap::{FnvHashMap, NodeMap, NodeSet, DefIdMap};
+use rustc::util::nodemap::{FnvHashMap, NodeSet, DefIdMap};
 use rustc::session::config::PanicStrategy;
 
 use std::cell::RefCell;
@@ -115,13 +115,6 @@ impl<'tcx> CrateStore<'tcx> for cstore::CStore {
         decoder::get_item_attrs(&cdata, def_id.index)
     }
 
-    fn item_symbol(&self, def: DefId) -> String
-    {
-        self.dep_graph.read(DepNode::MetaData(def));
-        let cdata = self.get_crate_data(def.krate);
-        decoder::get_symbol(&cdata, def.index)
-    }
-
     fn trait_def<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, def: DefId) -> ty::TraitDef<'tcx>
     {
         self.dep_graph.read(DepNode::MetaData(def));
@@ -569,7 +562,6 @@ impl<'tcx> CrateStore<'tcx> for cstore::CStore {
 
     fn encode_metadata<'a>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>,
                            reexports: &def::ExportMap,
-                           item_symbols: &RefCell<NodeMap<String>>,
                            link_meta: &LinkMeta,
                            reachable: &NodeSet,
                            mir_map: &MirMap<'tcx>,
@@ -579,7 +571,6 @@ impl<'tcx> CrateStore<'tcx> for cstore::CStore {
             diag: tcx.sess.diagnostic(),
             tcx: tcx,
             reexports: reexports,
-            item_symbols: item_symbols,
             link_meta: link_meta,
             cstore: self,
             reachable: reachable,

src/librustc_metadata/decoder.rs

@@ -213,10 +213,6 @@ fn item_sort(item: rbml::Doc) -> Option<char> {
     })
 }
 
-fn item_symbol(item: rbml::Doc) -> String {
-    reader::get_doc(item, tag_items_data_item_symbol).as_str().to_string()
-}
-
 fn untranslated_def_id(d: rbml::Doc) -> DefId {
     let id = reader::doc_as_u64(d);
     let index = DefIndex::new((id & 0xFFFF_FFFF) as usize);
@@ -640,10 +636,6 @@ pub fn get_impl_trait<'a, 'tcx>(cdata: Cmd,
     }
 }
 
-pub fn get_symbol(cdata: Cmd, id: DefIndex) -> String {
-    return item_symbol(cdata.lookup_item(id));
-}
-
 /// Iterates over the language items in the given crate.
 pub fn each_lang_item<F>(cdata: Cmd, mut f: F) -> bool where
     F: FnMut(DefIndex, usize) -> bool,

src/librustc_metadata/encoder.rs

@@ -34,7 +34,7 @@ use rustc::ty::util::IntTypeExt;
 use rustc::hir::svh::Svh;
 use rustc::mir::mir_map::MirMap;
 use rustc::session::config::{self, PanicStrategy};
-use rustc::util::nodemap::{FnvHashMap, NodeMap, NodeSet};
+use rustc::util::nodemap::{FnvHashMap, NodeSet};
 
 use rustc_serialize::Encodable;
 use std::cell::RefCell;
@@ -59,7 +59,6 @@ pub struct EncodeContext<'a, 'tcx: 'a> {
     pub diag: &'a Handler,
     pub tcx: TyCtxt<'a, 'tcx, 'tcx>,
     pub reexports: &'a def::ExportMap,
-    pub item_symbols: &'a RefCell<NodeMap<String>>,
     pub link_meta: &'a LinkMeta,
     pub cstore: &'a cstore::CStore,
     pub type_abbrevs: tyencode::abbrev_map<'tcx>,
@@ -213,20 +212,6 @@ fn encode_region(ecx: &EncodeContext,
     rbml_w.end_tag();
 }
 
-fn encode_symbol(ecx: &EncodeContext,
-                 rbml_w: &mut Encoder,
-                 id: NodeId) {
-    match ecx.item_symbols.borrow().get(&id) {
-        Some(x) => {
-            debug!("encode_symbol(id={}, str={})", id, *x);
-            rbml_w.wr_tagged_str(tag_items_data_item_symbol, x);
-        }
-        None => {
-            bug!("encode_symbol: id not found {}", id);
-        }
-    }
-}
-
 fn encode_disr_val(_: &EncodeContext,
                    rbml_w: &mut Encoder,
                    disr_val: ty::Disr) {
@@ -518,10 +503,6 @@ fn encode_info_for_struct_ctor<'a, 'tcx>(ecx: &EncodeContext<'a, 'tcx>,
     encode_name(rbml_w, name);
     encode_parent_item(rbml_w, ecx.tcx.map.local_def_id(struct_id));
 
-    if ecx.item_symbols.borrow().contains_key(&ctor_id) {
-        encode_symbol(ecx, rbml_w, ctor_id);
-    }
-
     let stab = ecx.tcx.lookup_stability(ecx.tcx.map.local_def_id(ctor_id));
     let depr= ecx.tcx.lookup_deprecation(ecx.tcx.map.local_def_id(ctor_id));
     encode_stability(rbml_w, stab);
@@ -710,10 +691,6 @@ fn encode_info_for_method<'a, 'tcx>(ecx: &EncodeContext<'a, 'tcx>,
             }
             encode_constness(rbml_w, sig.constness);
             encode_defaultness(rbml_w, impl_item.defaultness);
-            if !any_types {
-                let m_id = ecx.local_id(m.def_id);
-                encode_symbol(ecx, rbml_w, m_id);
-            }
             encode_method_argument_names(rbml_w, &sig.decl);
         }
     }
@@ -894,7 +871,6 @@ fn encode_info_for_item<'a, 'tcx>(ecx: &EncodeContext<'a, 'tcx>,
             encode_family(rbml_w, 'c');
         }
         encode_bounds_and_type_for_item(rbml_w, ecx, index, item.id);
-        encode_symbol(ecx, rbml_w, item.id);
         encode_name(rbml_w, item.name);
         encode_visibility(rbml_w, vis);
         encode_stability(rbml_w, stab);
@@ -931,9 +907,6 @@ fn encode_info_for_item<'a, 'tcx>(ecx: &EncodeContext<'a, 'tcx>,
             encode_inlined_item(ecx, rbml_w, InlinedItemRef::Item(item));
             encode_mir(ecx, rbml_w, item.id);
         }
-        if tps_len == 0 {
-            encode_symbol(ecx, rbml_w, item.id);
-        }
         encode_constness(rbml_w, constness);
         encode_visibility(rbml_w, vis);
         encode_stability(rbml_w, stab);
@@ -1365,8 +1338,6 @@ fn encode_info_for_foreign_item<'a, 'tcx>(ecx: &EncodeContext<'a, 'tcx>,
         if abi == Abi::RustIntrinsic || abi == Abi::PlatformIntrinsic {
             encode_inlined_item(ecx, rbml_w, InlinedItemRef::Foreign(nitem));
             encode_mir(ecx, rbml_w, nitem.id);
-        } else {
-            encode_symbol(ecx, rbml_w, nitem.id);
         }
         encode_attributes(rbml_w, &nitem.attrs);
         let stab = ecx.tcx.lookup_stability(ecx.tcx.map.local_def_id(nitem.id));
@@ -1387,7 +1358,6 @@ fn encode_info_for_foreign_item<'a, 'tcx>(ecx: &EncodeContext<'a, 'tcx>,
         let depr = ecx.tcx.lookup_deprecation(ecx.tcx.map.local_def_id(nitem.id));
         encode_stability(rbml_w, stab);
         encode_deprecation(rbml_w, depr);
-        encode_symbol(ecx, rbml_w, nitem.id);
         encode_name(rbml_w, nitem.name);
       }
     }

src/librustc_trans/base.rs

@@ -38,7 +38,6 @@ use llvm;
 use rustc::cfg;
 use rustc::hir::def_id::DefId;
 use middle::lang_items::{LangItem, ExchangeMallocFnLangItem, StartFnLangItem};
-use middle::weak_lang_items;
 use rustc::hir::pat_util::simple_name;
 use rustc::ty::subst::{self, Substs};
 use rustc::traits;
@@ -2345,15 +2344,6 @@ pub fn trans_item(ccx: &CrateContext, item: &hir::Item) {
             set_global_section(ccx, g, item);
             update_linkage(ccx, g, Some(item.id), OriginalTranslation);
         }
-        hir::ItemForeignMod(ref m) => {
-            if m.abi == Abi::RustIntrinsic || m.abi == Abi::PlatformIntrinsic {
-                return;
-            }
-            for fi in &m.items {
-                let lname = imported_name(fi.name, &fi.attrs).to_string();
-                ccx.item_symbols().borrow_mut().insert(fi.id, lname);
-            }
-        }
         _ => {}
     }
 }
@@ -2438,16 +2428,6 @@ pub fn create_entry_wrapper(ccx: &CrateContext, sp: Span, main_llfn: ValueRef) {
     }
 }
 
-pub fn imported_name(name: ast::Name, attrs: &[ast::Attribute]) -> InternedString {
-    match attr::first_attr_value_str_by_name(attrs, "link_name") {
-        Some(ln) => ln.clone(),
-        None => match weak_lang_items::link_name(attrs) {
-            Some(name) => name,
-            None => name.as_str(),
-        }
-    }
-}
-
 fn contains_null(s: &str) -> bool {
     s.bytes().any(|b| b == 0)
 }
@@ -2471,7 +2451,6 @@ pub fn write_metadata<'a, 'tcx>(cx: &SharedCrateContext<'a, 'tcx>,
     let cstore = &cx.tcx().sess.cstore;
     let metadata = cstore.encode_metadata(cx.tcx(),
                                           cx.export_map(),
-                                          cx.item_symbols(),
                                           cx.link_meta(),
                                           reachable,
                                           mir_map,

src/librustc_trans/callee.rs

@@ -575,11 +575,6 @@ fn get_fn<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>,
         llfn
     };
 
-    // Always insert into item_symbols, in case this item is exported.
-    if let Some(id) = local_item {
-        ccx.item_symbols().borrow_mut().insert(id, sym);
-    }
-
     ccx.instances().borrow_mut().insert(instance, llfn);
 
     immediate_rvalue(llfn, fn_ptr_ty)

src/librustc_trans/consts.rs

@@ -1033,13 +1033,10 @@ pub fn get_static<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>, def_id: DefId)
 
                 // Create the global before evaluating the initializer;
                 // this is necessary to allow recursive statics.
-                let g = declare::define_global(ccx, &sym, llty).unwrap_or_else(|| {
+                declare::define_global(ccx, &sym, llty).unwrap_or_else(|| {
                     ccx.sess().span_fatal(span,
                         &format!("symbol `{}` is already defined", sym))
-                });
-
-                ccx.item_symbols().borrow_mut().insert(id, sym);
-                g
+                })
             }
 
             hir_map::NodeForeignItem(&hir::ForeignItem {

src/librustc_trans/context.rs

@@ -71,7 +71,6 @@ pub struct SharedCrateContext<'a, 'tcx: 'a> {
 
     export_map: ExportMap,
     reachable: NodeSet,
-    item_symbols: RefCell<NodeMap<String>>,
     link_meta: LinkMeta,
     symbol_hasher: RefCell<Sha256>,
     tcx: TyCtxt<'a, 'tcx, 'tcx>,
@@ -395,7 +394,6 @@ impl<'b, 'tcx> SharedCrateContext<'b, 'tcx> {
             metadata_llcx: metadata_llcx,
             export_map: export_map,
             reachable: reachable,
-            item_symbols: RefCell::new(NodeMap()),
             link_meta: link_meta,
             symbol_hasher: RefCell::new(symbol_hasher),
             tcx: tcx,
@@ -439,10 +437,6 @@ impl<'b, 'tcx> SharedCrateContext<'b, 'tcx> {
         &self.reachable
     }
 
-    pub fn item_symbols<'a>(&'a self) -> &'a RefCell<NodeMap<String>> {
-        &self.item_symbols
-    }
-
     pub fn trait_cache(&self) -> &RefCell<DepTrackingMap<TraitSelectionCache<'tcx>>> {
         &self.trait_cache
     }
@@ -720,10 +714,6 @@ impl<'b, 'tcx> CrateContext<'b, 'tcx> {
         &self.shared.reachable
     }
 
-    pub fn item_symbols<'a>(&'a self) -> &'a RefCell<NodeMap<String>> {
-        &self.shared.item_symbols
-    }
-
     pub fn link_meta<'a>(&'a self) -> &'a LinkMeta {
         &self.shared.link_meta
     }