Remove each_linked_rlib_for_lto from CodegenContext

bjorn3 · bjorn3 · commit 0044549a2ab5 · 2025-07-17T10:04:24.000Z
diff --git a/compiler/rustc_codegen_gcc/src/back/lto.rs b/compiler/rustc_codegen_gcc/src/back/lto.rs
@@ -49,6 +49,7 @@ struct LtoData {
 
 fn prepare_lto(
     cgcx: &CodegenContext<GccCodegenBackend>,
+    each_linked_rlib_for_lto: &[PathBuf],
     dcx: DiagCtxtHandle<'_>,
 ) -> Result<LtoData, FatalError> {
     let tmp_path = match tempdir() {
@@ -67,7 +68,7 @@ fn prepare_lto(
     // with either fat or thin LTO
     let mut upstream_modules = Vec::new();
     if cgcx.lto != Lto::ThinLocal {
-        for &(_cnum, ref path) in cgcx.each_linked_rlib_for_lto.iter() {
+        for path in each_linked_rlib_for_lto {
             let archive_data = unsafe {
                 Mmap::map(File::open(path).expect("couldn't open rlib")).expect("couldn't map rlib")
             };
@@ -111,11 +112,12 @@ fn save_as_file(obj: &[u8], path: &Path) -> Result<(), LtoBitcodeFromRlib> {
 /// for further optimization.
 pub(crate) fn run_fat(
     cgcx: &CodegenContext<GccCodegenBackend>,
+    each_linked_rlib_for_lto: &[PathBuf],
     modules: Vec<FatLtoInput<GccCodegenBackend>>,
 ) -> Result<ModuleCodegen<GccContext>, FatalError> {
     let dcx = cgcx.create_dcx();
     let dcx = dcx.handle();
-    let lto_data = prepare_lto(cgcx, dcx)?;
+    let lto_data = prepare_lto(cgcx, each_linked_rlib_for_lto, dcx)?;
     /*let symbols_below_threshold =
     lto_data.symbols_below_threshold.iter().map(|c| c.as_ptr()).collect::<Vec<_>>();*/
     fat_lto(
@@ -281,12 +283,13 @@ impl ModuleBufferMethods for ModuleBuffer {
 /// can simply be copied over from the incr. comp. cache.
 pub(crate) fn run_thin(
     cgcx: &CodegenContext<GccCodegenBackend>,
+    each_linked_rlib_for_lto: &[PathBuf],
     modules: Vec<(String, ThinBuffer)>,
     cached_modules: Vec<(SerializedModule<ModuleBuffer>, WorkProduct)>,
 ) -> Result<(Vec<ThinModule<GccCodegenBackend>>, Vec<WorkProduct>), FatalError> {
     let dcx = cgcx.create_dcx();
     let dcx = dcx.handle();
-    let lto_data = prepare_lto(cgcx, dcx)?;
+    let lto_data = prepare_lto(cgcx, each_linked_rlib_for_lto, dcx)?;
     if cgcx.opts.cg.linker_plugin_lto.enabled() {
         unreachable!(
             "We should never reach this case if the LTO step \
diff --git a/compiler/rustc_codegen_gcc/src/lib.rs b/compiler/rustc_codegen_gcc/src/lib.rs
@@ -81,6 +81,7 @@ mod type_of;
 use std::any::Any;
 use std::fmt::Debug;
 use std::ops::Deref;
+use std::path::PathBuf;
 #[cfg(not(feature = "master"))]
 use std::sync::atomic::AtomicBool;
 #[cfg(not(feature = "master"))]
@@ -357,24 +358,26 @@ impl WriteBackendMethods for GccCodegenBackend {
         cgcx: &CodegenContext<Self>,
         // FIXME(bjorn3): Limit LTO exports to these symbols
         _exported_symbols_for_lto: &[String],
+        each_linked_rlib_for_lto: &[PathBuf],
         modules: Vec<FatLtoInput<Self>>,
         diff_fncs: Vec<AutoDiffItem>,
     ) -> Result<ModuleCodegen<Self::Module>, FatalError> {
         if !diff_fncs.is_empty() {
             unimplemented!();
         }
 
-        back::lto::run_fat(cgcx, modules)
+        back::lto::run_fat(cgcx, each_linked_rlib_for_lto, modules)
     }
 
     fn run_thin_lto(
         cgcx: &CodegenContext<Self>,
         // FIXME(bjorn3): Limit LTO exports to these symbols
         _exported_symbols_for_lto: &[String],
+        each_linked_rlib_for_lto: &[PathBuf],
         modules: Vec<(String, Self::ThinBuffer)>,
         cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
     ) -> Result<(Vec<ThinModule<Self>>, Vec<WorkProduct>), FatalError> {
-        back::lto::run_thin(cgcx, modules, cached_modules)
+        back::lto::run_thin(cgcx, each_linked_rlib_for_lto, modules, cached_modules)
     }
 
     fn print_pass_timings(&self) {
diff --git a/compiler/rustc_codegen_llvm/src/back/lto.rs b/compiler/rustc_codegen_llvm/src/back/lto.rs
@@ -1,7 +1,7 @@
 use std::collections::BTreeMap;
 use std::ffi::{CStr, CString};
 use std::fs::File;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::ptr::NonNull;
 use std::sync::Arc;
 use std::{io, iter, slice};
@@ -34,6 +34,7 @@ const THIN_LTO_KEYS_INCR_COMP_FILE_NAME: &str = "thin-lto-past-keys.bin";
 fn prepare_lto(
     cgcx: &CodegenContext<LlvmCodegenBackend>,
     exported_symbols_for_lto: &[String],
+    each_linked_rlib_for_lto: &[PathBuf],
     dcx: DiagCtxtHandle<'_>,
 ) -> Result<(Vec<CString>, Vec<(SerializedModule<ModuleBuffer>, CString)>), FatalError> {
     let mut symbols_below_threshold = exported_symbols_for_lto
@@ -54,7 +55,7 @@ fn prepare_lto(
     // with either fat or thin LTO
     let mut upstream_modules = Vec::new();
     if cgcx.lto != Lto::ThinLocal {
-        for &(_cnum, ref path) in cgcx.each_linked_rlib_for_lto.iter() {
+        for path in each_linked_rlib_for_lto {
             let archive_data = unsafe {
                 Mmap::map(std::fs::File::open(&path).expect("couldn't open rlib"))
                     .expect("couldn't map rlib")
@@ -136,12 +137,13 @@ fn get_bitcode_slice_from_object_data<'a>(
 pub(crate) fn run_fat(
     cgcx: &CodegenContext<LlvmCodegenBackend>,
     exported_symbols_for_lto: &[String],
+    each_linked_rlib_for_lto: &[PathBuf],
     modules: Vec<FatLtoInput<LlvmCodegenBackend>>,
 ) -> Result<ModuleCodegen<ModuleLlvm>, FatalError> {
     let dcx = cgcx.create_dcx();
     let dcx = dcx.handle();
     let (symbols_below_threshold, upstream_modules) =
-        prepare_lto(cgcx, exported_symbols_for_lto, dcx)?;
+        prepare_lto(cgcx, exported_symbols_for_lto, each_linked_rlib_for_lto, dcx)?;
     let symbols_below_threshold =
         symbols_below_threshold.iter().map(|c| c.as_ptr()).collect::<Vec<_>>();
     fat_lto(cgcx, dcx, modules, upstream_modules, &symbols_below_threshold)
@@ -153,13 +155,14 @@ pub(crate) fn run_fat(
 pub(crate) fn run_thin(
     cgcx: &CodegenContext<LlvmCodegenBackend>,
     exported_symbols_for_lto: &[String],
+    each_linked_rlib_for_lto: &[PathBuf],
     modules: Vec<(String, ThinBuffer)>,
     cached_modules: Vec<(SerializedModule<ModuleBuffer>, WorkProduct)>,
 ) -> Result<(Vec<ThinModule<LlvmCodegenBackend>>, Vec<WorkProduct>), FatalError> {
     let dcx = cgcx.create_dcx();
     let dcx = dcx.handle();
     let (symbols_below_threshold, upstream_modules) =
-        prepare_lto(cgcx, exported_symbols_for_lto, dcx)?;
+        prepare_lto(cgcx, exported_symbols_for_lto, each_linked_rlib_for_lto, dcx)?;
     let symbols_below_threshold =
         symbols_below_threshold.iter().map(|c| c.as_ptr()).collect::<Vec<_>>();
     if cgcx.opts.cg.linker_plugin_lto.enabled() {
diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -22,6 +22,7 @@
 use std::any::Any;
 use std::ffi::CStr;
 use std::mem::ManuallyDrop;
+use std::path::PathBuf;
 
 use back::owned_target_machine::OwnedTargetMachine;
 use back::write::{create_informational_target_machine, create_target_machine};
@@ -177,10 +178,12 @@ impl WriteBackendMethods for LlvmCodegenBackend {
     fn run_and_optimize_fat_lto(
         cgcx: &CodegenContext<Self>,
         exported_symbols_for_lto: &[String],
+        each_linked_rlib_for_lto: &[PathBuf],
         modules: Vec<FatLtoInput<Self>>,
         diff_fncs: Vec<AutoDiffItem>,
     ) -> Result<ModuleCodegen<Self::Module>, FatalError> {
-        let mut module = back::lto::run_fat(cgcx, exported_symbols_for_lto, modules)?;
+        let mut module =
+            back::lto::run_fat(cgcx, exported_symbols_for_lto, each_linked_rlib_for_lto, modules)?;
 
         if !diff_fncs.is_empty() {
             builder::autodiff::differentiate(&module, cgcx, diff_fncs)?;
@@ -195,10 +198,17 @@ impl WriteBackendMethods for LlvmCodegenBackend {
     fn run_thin_lto(
         cgcx: &CodegenContext<Self>,
         exported_symbols_for_lto: &[String],
+        each_linked_rlib_for_lto: &[PathBuf],
         modules: Vec<(String, Self::ThinBuffer)>,
         cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
     ) -> Result<(Vec<ThinModule<Self>>, Vec<WorkProduct>), FatalError> {
-        back::lto::run_thin(cgcx, exported_symbols_for_lto, modules, cached_modules)
+        back::lto::run_thin(
+            cgcx,
+            exported_symbols_for_lto,
+            each_linked_rlib_for_lto,
+            modules,
+            cached_modules,
+        )
     }
     fn optimize(
         cgcx: &CodegenContext<Self>,
diff --git a/compiler/rustc_codegen_ssa/src/back/lto.rs b/compiler/rustc_codegen_ssa/src/back/lto.rs
@@ -1,5 +1,4 @@
 use std::ffi::CString;
-use std::path::PathBuf;
 use std::sync::Arc;
 
 use rustc_data_structures::memmap::Mmap;
@@ -75,7 +74,7 @@ fn crate_type_allows_lto(crate_type: CrateType) -> bool {
 
 pub(super) fn exported_symbols_for_lto(
     tcx: TyCtxt<'_>,
-    each_linked_rlib_for_lto: &[(CrateNum, PathBuf)],
+    each_linked_rlib_for_lto: &[CrateNum],
 ) -> Vec<String> {
     // FIXME move symbol filtering to cg_ssa
     let export_threshold = match tcx.sess.lto() {
@@ -128,7 +127,7 @@ pub(super) fn exported_symbols_for_lto(
             tcx.sess.dcx().emit_fatal(DynamicLinkingWithLTO);
         }
 
-        for &(cnum, ref _path) in each_linked_rlib_for_lto {
+        for &cnum in each_linked_rlib_for_lto {
             {
                 let _timer = tcx.prof.generic_activity("lto_generate_symbols_below_threshold");
                 symbols_below_threshold.extend(copy_symbols(cnum));
diff --git a/compiler/rustc_codegen_ssa/src/back/write.rs b/compiler/rustc_codegen_ssa/src/back/write.rs
@@ -20,7 +20,6 @@ use rustc_errors::{
     Suggestions,
 };
 use rustc_fs_util::link_or_copy;
-use rustc_hir::def_id::CrateNum;
 use rustc_incremental::{
     copy_cgu_workproduct_to_incr_comp_cache_dir, in_incr_comp_dir, in_incr_comp_dir_sess,
 };
@@ -339,7 +338,6 @@ pub struct CodegenContext<B: WriteBackendMethods> {
     pub time_trace: bool,
     pub opts: Arc<config::Options>,
     pub crate_types: Vec<CrateType>,
-    pub each_linked_rlib_for_lto: Vec<(CrateNum, PathBuf)>,
     pub output_filenames: Arc<OutputFilenames>,
     pub invocation_temp: Option<String>,
     pub regular_module_config: Arc<ModuleConfig>,
@@ -395,14 +393,20 @@ impl<B: WriteBackendMethods> CodegenContext<B> {
 fn generate_thin_lto_work<B: ExtraBackendMethods>(
     cgcx: &CodegenContext<B>,
     exported_symbols_for_lto: &[String],
+    each_linked_rlib_for_lto: &[PathBuf],
     needs_thin_lto: Vec<(String, B::ThinBuffer)>,
     import_only_modules: Vec<(SerializedModule<B::ModuleBuffer>, WorkProduct)>,
 ) -> Vec<(WorkItem<B>, u64)> {
     let _prof_timer = cgcx.prof.generic_activity("codegen_thin_generate_lto_work");
 
-    let (lto_modules, copy_jobs) =
-        B::run_thin_lto(cgcx, exported_symbols_for_lto, needs_thin_lto, import_only_modules)
-            .unwrap_or_else(|e| e.raise());
+    let (lto_modules, copy_jobs) = B::run_thin_lto(
+        cgcx,
+        exported_symbols_for_lto,
+        each_linked_rlib_for_lto,
+        needs_thin_lto,
+        import_only_modules,
+    )
+    .unwrap_or_else(|e| e.raise());
     lto_modules
         .into_iter()
         .map(|module| {
@@ -719,6 +723,7 @@ pub(crate) enum WorkItem<B: WriteBackendMethods> {
     /// Performs fat LTO on the given module.
     FatLto {
         exported_symbols_for_lto: Arc<Vec<String>>,
+        each_linked_rlib_for_lto: Vec<PathBuf>,
         needs_fat_lto: Vec<FatLtoInput<B>>,
         import_only_modules: Vec<(SerializedModule<B::ModuleBuffer>, WorkProduct)>,
         autodiff: Vec<AutoDiffItem>,
@@ -992,6 +997,7 @@ fn execute_copy_from_cache_work_item<B: ExtraBackendMethods>(
 fn execute_fat_lto_work_item<B: ExtraBackendMethods>(
     cgcx: &CodegenContext<B>,
     exported_symbols_for_lto: &[String],
+    each_linked_rlib_for_lto: &[PathBuf],
     mut needs_fat_lto: Vec<FatLtoInput<B>>,
     import_only_modules: Vec<(SerializedModule<B::ModuleBuffer>, WorkProduct)>,
     autodiff: Vec<AutoDiffItem>,
@@ -1001,8 +1007,13 @@ fn execute_fat_lto_work_item<B: ExtraBackendMethods>(
         needs_fat_lto.push(FatLtoInput::Serialized { name: wp.cgu_name, buffer: module })
     }
 
-    let module =
-        B::run_and_optimize_fat_lto(cgcx, exported_symbols_for_lto, needs_fat_lto, autodiff)?;
+    let module = B::run_and_optimize_fat_lto(
+        cgcx,
+        exported_symbols_for_lto,
+        each_linked_rlib_for_lto,
+        needs_fat_lto,
+        autodiff,
+    )?;
     let module = B::codegen(cgcx, module, module_config)?;
     Ok(WorkItemResult::Finished(module))
 }
@@ -1118,11 +1129,13 @@ fn start_executing_work<B: ExtraBackendMethods>(
     let autodiff_items = autodiff_items.to_vec();
 
     let mut each_linked_rlib_for_lto = Vec::new();
+    let mut each_linked_rlib_file_for_lto = Vec::new();
     drop(link::each_linked_rlib(crate_info, None, &mut |cnum, path| {
         if link::ignored_for_lto(sess, crate_info, cnum) {
             return;
         }
-        each_linked_rlib_for_lto.push((cnum, path.to_path_buf()));
+        each_linked_rlib_for_lto.push(cnum);
+        each_linked_rlib_file_for_lto.push(path.to_path_buf());
     }));
 
     // Compute the set of symbols we need to retain when doing LTO (if we need to)
@@ -1162,7 +1175,6 @@ fn start_executing_work<B: ExtraBackendMethods>(
 
     let cgcx = CodegenContext::<B> {
         crate_types: tcx.crate_types().to_vec(),
-        each_linked_rlib_for_lto,
         lto: sess.lto(),
         fewer_names: sess.fewer_names(),
         save_temps: sess.opts.cg.save_temps,
@@ -1435,13 +1447,15 @@ fn start_executing_work<B: ExtraBackendMethods>(
                     let needs_fat_lto = mem::take(&mut needs_fat_lto);
                     let needs_thin_lto = mem::take(&mut needs_thin_lto);
                     let import_only_modules = mem::take(&mut lto_import_only_modules);
+                    let each_linked_rlib_for_lto = mem::take(&mut each_linked_rlib_file_for_lto);
 
                     if !needs_fat_lto.is_empty() {
                         assert!(needs_thin_lto.is_empty());
 
                         work_items.push((
                             WorkItem::FatLto {
-                                exported_symbols_for_lto: exported_symbols_for_lto.clone(),
+                                exported_symbols_for_lto: Arc::clone(exported_symbols_for_lto),
+                                each_linked_rlib_for_lto,
                                 needs_fat_lto,
                                 import_only_modules,
                                 autodiff: autodiff_items.clone(),
@@ -1460,6 +1474,7 @@ fn start_executing_work<B: ExtraBackendMethods>(
                         for (work, cost) in generate_thin_lto_work(
                             &cgcx,
                             &exported_symbols_for_lto,
+                            &each_linked_rlib_file_for_lto,
                             needs_thin_lto,
                             import_only_modules,
                         ) {
@@ -1803,6 +1818,7 @@ fn spawn_work<'a, B: ExtraBackendMethods>(
                 }
                 WorkItem::FatLto {
                     exported_symbols_for_lto,
+                    each_linked_rlib_for_lto,
                     needs_fat_lto,
                     import_only_modules,
                     autodiff,
@@ -1813,6 +1829,7 @@ fn spawn_work<'a, B: ExtraBackendMethods>(
                     execute_fat_lto_work_item(
                         &cgcx,
                         &exported_symbols_for_lto,
+                        &each_linked_rlib_for_lto,
                         needs_fat_lto,
                         import_only_modules,
                         autodiff,
diff --git a/compiler/rustc_codegen_ssa/src/traits/write.rs b/compiler/rustc_codegen_ssa/src/traits/write.rs
@@ -1,3 +1,5 @@
+use std::path::PathBuf;
+
 use rustc_ast::expand::autodiff_attrs::AutoDiffItem;
 use rustc_errors::{DiagCtxtHandle, FatalError};
 use rustc_middle::dep_graph::WorkProduct;
@@ -25,6 +27,7 @@ pub trait WriteBackendMethods: Clone + 'static {
     fn run_and_optimize_fat_lto(
         cgcx: &CodegenContext<Self>,
         exported_symbols_for_lto: &[String],
+        each_linked_rlib_for_lto: &[PathBuf],
         modules: Vec<FatLtoInput<Self>>,
         diff_fncs: Vec<AutoDiffItem>,
     ) -> Result<ModuleCodegen<Self::Module>, FatalError>;
@@ -34,6 +37,7 @@ pub trait WriteBackendMethods: Clone + 'static {
     fn run_thin_lto(
         cgcx: &CodegenContext<Self>,
         exported_symbols_for_lto: &[String],
+        each_linked_rlib_for_lto: &[PathBuf],
         modules: Vec<(String, Self::ThinBuffer)>,
         cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
     ) -> Result<(Vec<ThinModule<Self>>, Vec<WorkProduct>), FatalError>;
