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Consider only #[no_mangle] as builtin functions

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DianQK 2023-12-03 19:16:55 +08:00
parent 9ed0d11efb
commit ca0738f981
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1 changed files with 3 additions and 2 deletions
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5
compiler/rustc_codegen_ssa/src/back/symbol_export.rs
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@ -105,12 +105,14 @@ fn reachable_non_generics_provider(tcx: TyCtxt<'_>, _: LocalCrate) -> DefIdMap<S
} }
}) })
.map(|def_id| { .map(|def_id| {
let codegen_attrs = tcx.codegen_fn_attrs(def_id.to_def_id());
// We won't link right if this symbol is stripped during LTO. // We won't link right if this symbol is stripped during LTO.
let name = tcx.symbol_name(Instance::mono(tcx, def_id.to_def_id())).name; let name = tcx.symbol_name(Instance::mono(tcx, def_id.to_def_id())).name;
// We have to preserve the symbols of the built-in functions during LTO. // We have to preserve the symbols of the built-in functions during LTO.
let is_builtin_fn = is_compiler_builtins let is_builtin_fn = is_compiler_builtins
&& symbol_export_level(tcx, def_id.to_def_id()) && symbol_export_level(tcx, def_id.to_def_id())
.is_below_threshold(SymbolExportLevel::C); .is_below_threshold(SymbolExportLevel::C)
&& codegen_attrs.flags.contains(CodegenFnAttrFlags::NO_MANGLE);
let used = name == "rust_eh_personality"; let used = name == "rust_eh_personality";
let export_level = if special_runtime_crate { let export_level = if special_runtime_crate {
@ -118,7 +120,6 @@ fn reachable_non_generics_provider(tcx: TyCtxt<'_>, _: LocalCrate) -> DefIdMap<S
} else { } else {
symbol_export_level(tcx, def_id.to_def_id()) symbol_export_level(tcx, def_id.to_def_id())
}; };
let codegen_attrs = tcx.codegen_fn_attrs(def_id.to_def_id());
debug!( debug!(
"EXPORTED SYMBOL (local): {} ({:?})", "EXPORTED SYMBOL (local): {} ({:?})",
tcx.symbol_name(Instance::mono(tcx, def_id.to_def_id())), tcx.symbol_name(Instance::mono(tcx, def_id.to_def_id())),