Move wasm_import_module_map provider to cg_ssa

compiler/rustc_codegen_llvm/src/attributes.rs

@@ -4,12 +4,10 @@ use std::ffi::CString;
 
 use cstr::cstr;
 use rustc_codegen_ssa::traits::*;
-use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::small_c_str::SmallCStr;
 use rustc_hir::def_id::DefId;
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 use rustc_middle::ty::layout::HasTyCtxt;
-use rustc_middle::ty::query::Providers;
 use rustc_middle::ty::{self, TyCtxt};
 use rustc_session::config::{OptLevel, SanitizerSet};
 use rustc_session::Session;
@@ -339,35 +337,6 @@ pub fn from_fn_attrs(cx: &CodegenCx<'ll, 'tcx>, llfn: &'ll Value, instance: ty::
     }
 }
 
-pub fn provide_both(providers: &mut Providers) {
-    providers.wasm_import_module_map = |tcx, cnum| {
-        // Build up a map from DefId to a `NativeLib` structure, where
-        // `NativeLib` internally contains information about
-        // `#[link(wasm_import_module = "...")]` for example.
-        let native_libs = tcx.native_libraries(cnum);
-
-        let def_id_to_native_lib = native_libs
-            .iter()
-            .filter_map(|lib| lib.foreign_module.map(|id| (id, lib)))
-            .collect::<FxHashMap<_, _>>();
-
-        let mut ret = FxHashMap::default();
-        for (def_id, lib) in tcx.foreign_modules(cnum).iter() {
-            let module = def_id_to_native_lib.get(&def_id).and_then(|s| s.wasm_import_module);
-            let module = match module {
-                Some(s) => s,
-                None => continue,
-            };
-            ret.extend(lib.foreign_items.iter().map(|id| {
-                assert_eq!(id.krate, cnum);
-                (*id, module.to_string())
-            }));
-        }
-
-        ret
-    };
-}
-
 fn wasm_import_module(tcx: TyCtxt<'_>, id: DefId) -> Option<CString> {
     tcx.wasm_import_module_map(id.krate).get(&id).map(|s| CString::new(&s[..]).unwrap())
 }

compiler/rustc_codegen_llvm/src/lib.rs

@@ -253,13 +253,8 @@ impl CodegenBackend for LlvmCodegenBackend {
         Box::new(metadata::LlvmMetadataLoader)
     }
 
-    fn provide(&self, providers: &mut ty::query::Providers) {
+    fn provide(&self, _providers: &mut ty::query::Providers) {}
-        attributes::provide_both(providers);
+    fn provide_extern(&self, _providers: &mut ty::query::Providers) {}
-    }
-
-    fn provide_extern(&self, providers: &mut ty::query::Providers) {
-        attributes::provide_both(providers);
-    }
 
     fn codegen_crate<'tcx>(
         &self,

compiler/rustc_codegen_ssa/src/back/symbol_export.rs

@@ -369,11 +369,13 @@ pub fn provide(providers: &mut Providers) {
     providers.upstream_monomorphizations = upstream_monomorphizations_provider;
     providers.is_unreachable_local_definition = is_unreachable_local_definition_provider;
     providers.upstream_drop_glue_for = upstream_drop_glue_for_provider;
+    providers.wasm_import_module_map = wasm_import_module_map;
 }
 
 pub fn provide_extern(providers: &mut Providers) {
     providers.is_reachable_non_generic = is_reachable_non_generic_provider_extern;
     providers.upstream_monomorphizations_for = upstream_monomorphizations_for_provider;
+    providers.wasm_import_module_map = wasm_import_module_map;
 }
 
 fn symbol_export_level(tcx: TyCtxt<'_>, sym_def_id: DefId) -> SymbolExportLevel {
@@ -441,3 +443,30 @@ pub fn symbol_name_for_instance_in_crate<'tcx>(
         ExportedSymbol::NoDefId(symbol_name) => symbol_name.to_string(),
     }
 }
+
+fn wasm_import_module_map(tcx: TyCtxt<'_>, cnum: CrateNum) -> FxHashMap<DefId, String> {
+    // Build up a map from DefId to a `NativeLib` structure, where
+    // `NativeLib` internally contains information about
+    // `#[link(wasm_import_module = "...")]` for example.
+    let native_libs = tcx.native_libraries(cnum);
+
+    let def_id_to_native_lib = native_libs
+        .iter()
+        .filter_map(|lib| lib.foreign_module.map(|id| (id, lib)))
+        .collect::<FxHashMap<_, _>>();
+
+    let mut ret = FxHashMap::default();
+    for (def_id, lib) in tcx.foreign_modules(cnum).iter() {
+        let module = def_id_to_native_lib.get(&def_id).and_then(|s| s.wasm_import_module);
+        let module = match module {
+            Some(s) => s,
+            None => continue,
+        };
+        ret.extend(lib.foreign_items.iter().map(|id| {
+            assert_eq!(id.krate, cnum);
+            (*id, module.to_string())
+        }));
+    }
+
+    ret
+}