5 //! This API is completely unstable and subject to change.
7 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
9 #![feature(box_patterns)]
10 #![feature(box_syntax)]
11 #![feature(const_cstr_unchecked)]
12 #![feature(crate_visibility_modifier)]
13 #![feature(extern_types)]
14 #![feature(in_band_lifetimes)]
15 #![allow(unused_attributes)]
18 #![feature(rustc_diagnostic_macros)]
19 #![feature(optin_builtin_traits)]
20 #![feature(concat_idents)]
21 #![feature(link_args)]
22 #![feature(static_nobundle)]
23 #![feature(trusted_len)]
24 #![deny(rust_2018_idioms)]
25 #![allow(explicit_outlives_requirements)]
27 use back::write::{create_target_machine, create_informational_target_machine};
28 use syntax_pos::symbol::Symbol;
31 #[macro_use] extern crate bitflags;
33 #[macro_use] extern crate rustc;
34 extern crate rustc_allocator;
35 extern crate rustc_target;
36 #[macro_use] extern crate rustc_data_structures;
37 extern crate rustc_incremental;
38 extern crate rustc_codegen_utils;
39 extern crate rustc_codegen_ssa;
40 extern crate rustc_fs_util;
42 #[macro_use] extern crate log;
43 #[macro_use] extern crate syntax;
44 extern crate syntax_pos;
45 extern crate rustc_errors as errors;
47 use rustc_codegen_ssa::traits::*;
48 use rustc_codegen_ssa::back::write::{CodegenContext, ModuleConfig, FatLTOInput};
49 use rustc_codegen_ssa::back::lto::{SerializedModule, LtoModuleCodegen, ThinModule};
50 use rustc_codegen_ssa::CompiledModule;
51 use errors::{FatalError, Handler};
52 use rustc::dep_graph::WorkProduct;
53 use syntax_pos::symbol::InternedString;
54 pub use llvm_util::target_features;
56 use std::sync::{mpsc, Arc};
58 use rustc::dep_graph::DepGraph;
59 use rustc::middle::allocator::AllocatorKind;
60 use rustc::middle::cstore::{EncodedMetadata, MetadataLoader};
61 use rustc::session::Session;
62 use rustc::session::config::{OutputFilenames, OutputType, PrintRequest, OptLevel};
63 use rustc::ty::{self, TyCtxt};
64 use rustc::util::common::ErrorReported;
65 use rustc_codegen_ssa::ModuleCodegen;
66 use rustc_codegen_utils::codegen_backend::CodegenBackend;
91 // The following is a work around that replaces `pub mod llvm;` and that fixes issue 53912.
92 #[path = "llvm/mod.rs"] mod llvm_; pub mod llvm { pub use super::llvm_::*; }
103 pub struct LlvmCodegenBackend(());
105 impl ExtraBackendMethods for LlvmCodegenBackend {
106 fn new_metadata(&self, tcx: TyCtxt<'_, '_, '_>, mod_name: &str) -> ModuleLlvm {
107 ModuleLlvm::new_metadata(tcx, mod_name)
110 fn write_compressed_metadata<'b, 'gcx>(
112 tcx: TyCtxt<'b, 'gcx, 'gcx>,
113 metadata: &EncodedMetadata,
114 llvm_module: &mut ModuleLlvm
116 base::write_compressed_metadata(tcx, metadata, llvm_module)
118 fn codegen_allocator<'b, 'gcx>(
120 tcx: TyCtxt<'b, 'gcx, 'gcx>,
121 mods: &mut ModuleLlvm,
124 unsafe { allocator::codegen(tcx, mods, kind) }
126 fn compile_codegen_unit<'a, 'tcx: 'a>(
128 tcx: TyCtxt<'a, 'tcx, 'tcx>,
129 cgu_name: InternedString,
131 base::compile_codegen_unit(tcx, cgu_name);
133 fn target_machine_factory(
139 Result<&'static mut llvm::TargetMachine, String> + Send + Sync> {
140 back::write::target_machine_factory(sess, optlvl, find_features)
142 fn target_cpu<'b>(&self, sess: &'b Session) -> &'b str {
143 llvm_util::target_cpu(sess)
147 impl WriteBackendMethods for LlvmCodegenBackend {
148 type Module = ModuleLlvm;
149 type ModuleBuffer = back::lto::ModuleBuffer;
150 type Context = llvm::Context;
151 type TargetMachine = &'static mut llvm::TargetMachine;
152 type ThinData = back::lto::ThinData;
153 type ThinBuffer = back::lto::ThinBuffer;
154 fn print_pass_timings(&self) {
155 unsafe { llvm::LLVMRustPrintPassTimings(); }
158 cgcx: &CodegenContext<Self>,
159 modules: Vec<FatLTOInput<Self>>,
160 cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
161 ) -> Result<LtoModuleCodegen<Self>, FatalError> {
162 back::lto::run_fat(cgcx, modules, cached_modules)
165 cgcx: &CodegenContext<Self>,
166 modules: Vec<(String, Self::ThinBuffer)>,
167 cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
168 ) -> Result<(Vec<LtoModuleCodegen<Self>>, Vec<WorkProduct>), FatalError> {
169 back::lto::run_thin(cgcx, modules, cached_modules)
172 cgcx: &CodegenContext<Self>,
173 diag_handler: &Handler,
174 module: &ModuleCodegen<Self::Module>,
175 config: &ModuleConfig,
176 ) -> Result<(), FatalError> {
177 back::write::optimize(cgcx, diag_handler, module, config)
179 unsafe fn optimize_thin(
180 cgcx: &CodegenContext<Self>,
181 thin: &mut ThinModule<Self>,
182 ) -> Result<ModuleCodegen<Self::Module>, FatalError> {
183 back::lto::optimize_thin_module(thin, cgcx)
186 cgcx: &CodegenContext<Self>,
187 diag_handler: &Handler,
188 module: ModuleCodegen<Self::Module>,
189 config: &ModuleConfig,
190 ) -> Result<CompiledModule, FatalError> {
191 back::write::codegen(cgcx, diag_handler, module, config)
194 module: ModuleCodegen<Self::Module>
195 ) -> (String, Self::ThinBuffer) {
196 back::lto::prepare_thin(module)
199 module: ModuleCodegen<Self::Module>
200 ) -> (String, Self::ModuleBuffer) {
201 (module.name, back::lto::ModuleBuffer::new(module.module_llvm.llmod()))
203 fn run_lto_pass_manager(
204 cgcx: &CodegenContext<Self>,
205 module: &ModuleCodegen<Self::Module>,
206 config: &ModuleConfig,
209 back::lto::run_pass_manager(cgcx, module, config, thin)
213 unsafe impl Send for LlvmCodegenBackend {} // Llvm is on a per-thread basis
214 unsafe impl Sync for LlvmCodegenBackend {}
216 impl LlvmCodegenBackend {
217 pub fn new() -> Box<dyn CodegenBackend> {
218 box LlvmCodegenBackend(())
222 impl CodegenBackend for LlvmCodegenBackend {
223 fn init(&self, sess: &Session) {
224 llvm_util::init(sess); // Make sure llvm is inited
227 fn print(&self, req: PrintRequest, sess: &Session) {
229 PrintRequest::RelocationModels => {
230 println!("Available relocation models:");
231 for &(name, _) in back::write::RELOC_MODEL_ARGS.iter() {
232 println!(" {}", name);
236 PrintRequest::CodeModels => {
237 println!("Available code models:");
238 for &(name, _) in back::write::CODE_GEN_MODEL_ARGS.iter(){
239 println!(" {}", name);
243 PrintRequest::TlsModels => {
244 println!("Available TLS models:");
245 for &(name, _) in back::write::TLS_MODEL_ARGS.iter(){
246 println!(" {}", name);
250 req => llvm_util::print(req, sess),
254 fn print_passes(&self) {
255 llvm_util::print_passes();
258 fn print_version(&self) {
259 llvm_util::print_version();
262 fn diagnostics(&self) -> &[(&'static str, &'static str)] {
266 fn target_features(&self, sess: &Session) -> Vec<Symbol> {
267 target_features(sess)
270 fn metadata_loader(&self) -> Box<dyn MetadataLoader + Sync> {
271 box metadata::LlvmMetadataLoader
274 fn provide(&self, providers: &mut ty::query::Providers<'_>) {
275 rustc_codegen_utils::symbol_names::provide(providers);
276 rustc_codegen_ssa::back::symbol_export::provide(providers);
277 rustc_codegen_ssa::base::provide_both(providers);
278 attributes::provide(providers);
281 fn provide_extern(&self, providers: &mut ty::query::Providers<'_>) {
282 rustc_codegen_ssa::back::symbol_export::provide_extern(providers);
283 rustc_codegen_ssa::base::provide_both(providers);
284 attributes::provide_extern(providers);
287 fn codegen_crate<'b, 'tcx>(
289 tcx: TyCtxt<'b, 'tcx, 'tcx>,
290 metadata: EncodedMetadata,
291 need_metadata_module: bool,
292 rx: mpsc::Receiver<Box<dyn Any + Send>>
294 box rustc_codegen_ssa::base::codegen_crate(
295 LlvmCodegenBackend(()), tcx, metadata, need_metadata_module, rx)
298 fn join_codegen_and_link(
300 ongoing_codegen: Box<dyn Any>,
302 dep_graph: &DepGraph,
303 outputs: &OutputFilenames,
304 ) -> Result<(), ErrorReported> {
305 use rustc::util::common::time;
306 let (codegen_results, work_products) =
307 ongoing_codegen.downcast::
308 <rustc_codegen_ssa::back::write::OngoingCodegen<LlvmCodegenBackend>>()
309 .expect("Expected LlvmCodegenBackend's OngoingCodegen, found Box<Any>")
311 if sess.opts.debugging_opts.incremental_info {
312 rustc_codegen_ssa::back::write::dump_incremental_data(&codegen_results);
316 "serialize work products",
317 move || rustc_incremental::save_work_product_index(sess, &dep_graph, work_products));
319 sess.compile_status()?;
321 if !sess.opts.output_types.keys().any(|&i| i == OutputType::Exe ||
322 i == OutputType::Metadata) {
326 // Run the linker on any artifacts that resulted from the LLVM run.
327 // This should produce either a finished executable or library.
328 sess.profiler(|p| p.start_activity("link_crate"));
329 time(sess, "linking", || {
330 use rustc_codegen_ssa::back::link::link_binary;
331 use crate::back::archive::LlvmArchiveBuilder;
333 let target_cpu = crate::llvm_util::target_cpu(sess);
334 link_binary::<LlvmArchiveBuilder<'_>>(
338 &codegen_results.crate_name.as_str(),
342 sess.profiler(|p| p.end_activity("link_crate"));
344 // Now that we won't touch anything in the incremental compilation directory
345 // any more, we can finalize it (which involves renaming it)
346 rustc_incremental::finalize_session_directory(sess, codegen_results.crate_hash);
352 /// This is the entrypoint for a hot plugged rustc_codegen_llvm
354 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
355 LlvmCodegenBackend::new()
358 pub struct ModuleLlvm {
359 llcx: &'static mut llvm::Context,
360 llmod_raw: *const llvm::Module,
361 tm: &'static mut llvm::TargetMachine,
364 unsafe impl Send for ModuleLlvm { }
365 unsafe impl Sync for ModuleLlvm { }
368 fn new(tcx: TyCtxt<'_, '_, '_>, mod_name: &str) -> Self {
370 let llcx = llvm::LLVMRustContextCreate(tcx.sess.fewer_names());
371 let llmod_raw = context::create_module(tcx, llcx, mod_name) as *const _;
375 tm: create_target_machine(tcx, false),
380 fn new_metadata(tcx: TyCtxt<'_, '_, '_>, mod_name: &str) -> Self {
382 let llcx = llvm::LLVMRustContextCreate(tcx.sess.fewer_names());
383 let llmod_raw = context::create_module(tcx, llcx, mod_name) as *const _;
387 tm: create_informational_target_machine(&tcx.sess, false),
393 cgcx: &CodegenContext<LlvmCodegenBackend>,
395 buffer: &back::lto::ModuleBuffer,
397 ) -> Result<Self, FatalError> {
399 let llcx = llvm::LLVMRustContextCreate(cgcx.fewer_names);
400 let llmod_raw = buffer.parse(name, llcx, handler)?;
401 let tm = match (cgcx.tm_factory.0)() {
404 handler.struct_err(&e).emit();
405 return Err(FatalError)
417 fn llmod(&self) -> &llvm::Module {
424 impl Drop for ModuleLlvm {
427 llvm::LLVMContextDispose(&mut *(self.llcx as *mut _));
428 llvm::LLVMRustDisposeTargetMachine(&mut *(self.tm as *mut _));
433 __build_diagnostic_array! { librustc_codegen_llvm, DIAGNOSTICS }