Use () in dependency_formats.

Author: cjgillot

compiler/rustc_codegen_cranelift/src/allocator.rs

@@ -13,7 +13,7 @@ pub(crate) fn codegen(
     module: &mut impl Module,
     unwind_context: &mut UnwindContext,
 ) -> bool {
-    let any_dynamic_crate = tcx.dependency_formats(LOCAL_CRATE).iter().any(|(_, list)| {
+    let any_dynamic_crate = tcx.dependency_formats(()).iter().any(|(_, list)| {
         use rustc_middle::middle::dependency_format::Linkage;
         list.iter().any(|&linkage| linkage == Linkage::Dynamic)
     });

compiler/rustc_codegen_cranelift/src/driver/jit.rs

@@ -179,7 +179,7 @@ fn load_imported_symbols_for_jit(tcx: TyCtxt<'_>) -> Vec<(String, *const u8)> {
     let mut dylib_paths = Vec::new();
 
     let crate_info = CrateInfo::new(tcx);
-    let formats = tcx.dependency_formats(LOCAL_CRATE);
+    let formats = tcx.dependency_formats(());
     let data = &formats
         .iter()
         .find(|(crate_type, _data)| *crate_type == rustc_session::config::CrateType::Executable)

compiler/rustc_codegen_ssa/src/back/linker.rs

@@ -1303,7 +1303,7 @@ fn exported_symbols(tcx: TyCtxt<'_>, crate_type: CrateType) -> Vec<String> {
         }
     }
 
-    let formats = tcx.dependency_formats(LOCAL_CRATE);
+    let formats = tcx.dependency_formats(());
     let deps = formats.iter().find_map(|(t, list)| (*t == crate_type).then_some(list)).unwrap();
 
     for (index, dep_format) in deps.iter().enumerate() {

compiler/rustc_codegen_ssa/src/base.rs

@@ -511,7 +511,7 @@ pub fn codegen_crate<B: ExtraBackendMethods>(
     // linkage, then it's already got an allocator shim and we'll be using that
     // one instead. If nothing exists then it's our job to generate the
     // allocator!
-    let any_dynamic_crate = tcx.dependency_formats(LOCAL_CRATE).iter().any(|(_, list)| {
+    let any_dynamic_crate = tcx.dependency_formats(()).iter().any(|(_, list)| {
         use rustc_middle::middle::dependency_format::Linkage;
         list.iter().any(|&linkage| linkage == Linkage::Dynamic)
     });
@@ -768,7 +768,7 @@ impl CrateInfo {
             used_crate_source: Default::default(),
             lang_item_to_crate: Default::default(),
             missing_lang_items: Default::default(),
-            dependency_formats: tcx.dependency_formats(LOCAL_CRATE),
+            dependency_formats: tcx.dependency_formats(()),
         };
         let lang_items = tcx.lang_items();
 

compiler/rustc_metadata/src/rmeta/decoder/cstore_impl.rs

@@ -370,10 +370,7 @@ pub fn provide(providers: &mut Providers) {
             visible_parent_map
         },
 
-        dependency_formats: |tcx, cnum| {
-            assert_eq!(cnum, LOCAL_CRATE);
-            Lrc::new(crate::dependency_format::calculate(tcx))
-        },
+        dependency_formats: |tcx, ()| Lrc::new(crate::dependency_format::calculate(tcx)),
         has_global_allocator: |tcx, cnum| {
             assert_eq!(cnum, LOCAL_CRATE);
             CStore::from_tcx(tcx).has_global_allocator()

compiler/rustc_metadata/src/rmeta/encoder.rs

@@ -1773,7 +1773,7 @@ impl EncodeContext<'a, 'tcx> {
 
     fn encode_dylib_dependency_formats(&mut self) -> Lazy<[Option<LinkagePreference>]> {
         empty_proc_macro!(self);
-        let formats = self.tcx.dependency_formats(LOCAL_CRATE);
+        let formats = self.tcx.dependency_formats(());
         for (ty, arr) in formats.iter() {
             if *ty != CrateType::Dylib {
                 continue;

compiler/rustc_middle/src/query/mod.rs

@@ -1053,9 +1053,7 @@ rustc_queries! {
         desc { "dylib dependency formats of crate" }
     }
 
-    query dependency_formats(_: CrateNum)
-        -> Lrc<crate::middle::dependency_format::Dependencies>
-    {
+    query dependency_formats(_: ()) -> Lrc<crate::middle::dependency_format::Dependencies> {
         desc { "get the linkage format of all dependencies" }
     }
 

compiler/rustc_query_impl/src/keys.rs

@@ -21,6 +21,16 @@ pub trait Key {
     fn default_span(&self, tcx: TyCtxt<'_>) -> Span;
 }
 
+impl Key for () {
+    fn query_crate(&self) -> CrateNum {
+        LOCAL_CRATE
+    }
+
+    fn default_span(&self, _: TyCtxt<'_>) -> Span {
+        DUMMY_SP
+    }
+}
+
 impl<'tcx> Key for ty::InstanceDef<'tcx> {
     fn query_crate(&self) -> CrateNum {
         LOCAL_CRATE