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Allow LTO for dylibs

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bjorn3 2022-09-04 09:26:04 +00:00 • committed by Jakub Beránek
parent f7f17bf220
commit 32238ce1e2
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3 changed files with 33 additions and 24 deletions
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18
compiler/rustc_codegen_ssa/src/back/write.rs
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@ -999,6 +999,14 @@ fn start_executing_work<B: ExtraBackendMethods>(
let coordinator_send = tx_to_llvm_workers;
let sess = tcx.sess;
let mut each_linked_rlib_for_lto = Vec::new();
drop(link::each_linked_rlib(sess, crate_info, &mut |cnum, path| {
if link::ignored_for_lto(sess, crate_info, cnum) {
return;
}
each_linked_rlib_for_lto.push((cnum, path.to_path_buf()));
}));
// Compute the set of symbols we need to retain when doing LTO (if we need to)
let exported_symbols = {
let mut exported_symbols = FxHashMap::default();
@ -1020,7 +1028,7 @@ fn start_executing_work<B: ExtraBackendMethods>(
}
Lto::Fat | Lto::Thin => {
exported_symbols.insert(LOCAL_CRATE, copy_symbols(LOCAL_CRATE));
for &cnum in tcx.crates(()).iter() {
for &(cnum, ref _path) in &each_linked_rlib_for_lto {
exported_symbols.insert(cnum, copy_symbols(cnum));
}
Some(Arc::new(exported_symbols))
@ -1040,14 +1048,6 @@ fn start_executing_work<B: ExtraBackendMethods>(
})
.expect("failed to spawn helper thread");
let mut each_linked_rlib_for_lto = Vec::new();
drop(link::each_linked_rlib(crate_info, &mut |cnum, path| {
if link::ignored_for_lto(sess, crate_info, cnum) {
return;
}
each_linked_rlib_for_lto.push((cnum, path.to_path_buf()));
}));
let ol =
if tcx.sess.opts.unstable_opts.no_codegen || !tcx.sess.opts.output_types.should_codegen() {
// If we know that we won’t be doing codegen, create target machines without optimisation.