bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

Move wasm_import_module_map provider to cg_ssa

Browse source
This commit is contained in:
bjorn3 2021-03-29 10:13:50 +02:00
parent 808090eb07
commit c47eeac612
3 changed files with 31 additions and 38 deletions
Download patch file Download diff file Expand all files Collapse all files

29
compiler/rustc_codegen_ssa/src/back/symbol_export.rs
View file

@ -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
}