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(crate_visibility_modifier)]
12 #![feature(custom_attribute)]
13 #![feature(extern_types)]
14 #![feature(in_band_lifetimes)]
15 #![allow(unused_attributes)]
18 #![feature(range_contains)]
19 #![feature(rustc_diagnostic_macros)]
20 #![feature(optin_builtin_traits)]
21 #![feature(concat_idents)]
22 #![feature(link_args)]
23 #![feature(static_nobundle)]
24 #![deny(rust_2018_idioms)]
25 #![allow(explicit_outlives_requirements)]
27 use back::write::create_target_machine;
28 use syntax_pos::symbol::Symbol;
31 #[macro_use] extern crate bitflags;
33 #[macro_use] extern crate rustc;
34 extern crate rustc_mir;
35 extern crate rustc_allocator;
36 extern crate rustc_target;
37 #[macro_use] extern crate rustc_data_structures;
38 extern crate rustc_incremental;
39 extern crate rustc_codegen_utils;
40 extern crate rustc_codegen_ssa;
41 extern crate rustc_fs_util;
43 #[macro_use] extern crate log;
44 #[macro_use] extern crate syntax;
45 extern crate syntax_pos;
46 extern crate rustc_errors as errors;
47 extern crate serialize;
48 extern crate tempfile;
50 use rustc_codegen_ssa::traits::*;
51 use rustc_codegen_ssa::back::write::{CodegenContext, ModuleConfig, FatLTOInput};
52 use rustc_codegen_ssa::back::lto::{SerializedModule, LtoModuleCodegen, ThinModule};
53 use rustc_codegen_ssa::CompiledModule;
54 use errors::{FatalError, Handler};
55 use rustc::dep_graph::WorkProduct;
56 use rustc::util::time_graph::Timeline;
57 use syntax_pos::symbol::InternedString;
58 use rustc::mir::mono::Stats;
59 pub use llvm_util::target_features;
61 use std::sync::{mpsc, Arc};
63 use rustc::dep_graph::DepGraph;
64 use rustc::middle::allocator::AllocatorKind;
65 use rustc::middle::cstore::{EncodedMetadata, MetadataLoader};
66 use rustc::session::{Session, CompileIncomplete};
67 use rustc::session::config::{OutputFilenames, OutputType, PrintRequest, OptLevel};
68 use rustc::ty::{self, TyCtxt};
69 use rustc::util::time_graph;
70 use rustc::util::profiling::ProfileCategory;
71 use rustc_mir::monomorphize;
72 use rustc_codegen_ssa::ModuleCodegen;
73 use rustc_codegen_utils::codegen_backend::CodegenBackend;
101 // The following is a work around that replaces `pub mod llvm;` and that fixes issue 53912.
102 #[path = "llvm/mod.rs"] mod llvm_; pub mod llvm { pub use super::llvm_::*; }
113 pub struct LlvmCodegenBackend(());
115 impl ExtraBackendMethods for LlvmCodegenBackend {
116 fn new_metadata(&self, tcx: TyCtxt<'_, '_, '_>, mod_name: &str) -> ModuleLlvm {
117 ModuleLlvm::new(tcx, mod_name)
119 fn write_metadata<'b, 'gcx>(
121 tcx: TyCtxt<'b, 'gcx, 'gcx>,
122 metadata: &mut ModuleLlvm
123 ) -> EncodedMetadata {
124 base::write_metadata(tcx, metadata)
126 fn codegen_allocator(
128 tcx: TyCtxt<'_, '_, '_>,
129 mods: &mut ModuleLlvm,
132 unsafe { allocator::codegen(tcx, mods, kind) }
134 fn compile_codegen_unit<'a, 'tcx: 'a>(
136 tcx: TyCtxt<'a, 'tcx, 'tcx>,
137 cgu_name: InternedString,
139 base::compile_codegen_unit(tcx, cgu_name)
141 fn target_machine_factory(
147 Result<&'static mut llvm::TargetMachine, String> + Send + Sync> {
148 back::write::target_machine_factory(sess, optlvl, find_features)
150 fn target_cpu<'b>(&self, sess: &'b Session) -> &'b str {
151 llvm_util::target_cpu(sess)
155 impl WriteBackendMethods for LlvmCodegenBackend {
156 type Module = ModuleLlvm;
157 type ModuleBuffer = back::lto::ModuleBuffer;
158 type Context = llvm::Context;
159 type TargetMachine = &'static mut llvm::TargetMachine;
160 type ThinData = back::lto::ThinData;
161 type ThinBuffer = back::lto::ThinBuffer;
162 fn print_pass_timings(&self) {
163 unsafe { llvm::LLVMRustPrintPassTimings(); }
166 cgcx: &CodegenContext<Self>,
167 modules: Vec<FatLTOInput<Self>>,
168 cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
169 timeline: &mut Timeline
170 ) -> Result<LtoModuleCodegen<Self>, FatalError> {
171 back::lto::run_fat(cgcx, modules, cached_modules, timeline)
174 cgcx: &CodegenContext<Self>,
175 modules: Vec<(String, Self::ThinBuffer)>,
176 cached_modules: Vec<(SerializedModule<Self::ModuleBuffer>, WorkProduct)>,
177 timeline: &mut Timeline
178 ) -> Result<(Vec<LtoModuleCodegen<Self>>, Vec<WorkProduct>), FatalError> {
179 back::lto::run_thin(cgcx, modules, cached_modules, timeline)
182 cgcx: &CodegenContext<Self>,
183 diag_handler: &Handler,
184 module: &ModuleCodegen<Self::Module>,
185 config: &ModuleConfig,
186 timeline: &mut Timeline
187 ) -> Result<(), FatalError> {
188 back::write::optimize(cgcx, diag_handler, module, config, timeline)
190 unsafe fn optimize_thin(
191 cgcx: &CodegenContext<Self>,
192 thin: &mut ThinModule<Self>,
193 timeline: &mut Timeline
194 ) -> Result<ModuleCodegen<Self::Module>, FatalError> {
195 back::lto::optimize_thin_module(thin, cgcx, timeline)
198 cgcx: &CodegenContext<Self>,
199 diag_handler: &Handler,
200 module: ModuleCodegen<Self::Module>,
201 config: &ModuleConfig,
202 timeline: &mut Timeline
203 ) -> Result<CompiledModule, FatalError> {
204 back::write::codegen(cgcx, diag_handler, module, config, timeline)
207 module: ModuleCodegen<Self::Module>
208 ) -> (String, Self::ThinBuffer) {
209 back::lto::prepare_thin(module)
212 module: ModuleCodegen<Self::Module>
213 ) -> (String, Self::ModuleBuffer) {
214 (module.name, back::lto::ModuleBuffer::new(module.module_llvm.llmod()))
216 fn run_lto_pass_manager(
217 cgcx: &CodegenContext<Self>,
218 module: &ModuleCodegen<Self::Module>,
219 config: &ModuleConfig,
222 back::lto::run_pass_manager(cgcx, module, config, thin)
226 unsafe impl Send for LlvmCodegenBackend {} // Llvm is on a per-thread basis
227 unsafe impl Sync for LlvmCodegenBackend {}
229 impl LlvmCodegenBackend {
230 pub fn new() -> Box<dyn CodegenBackend> {
231 box LlvmCodegenBackend(())
235 impl CodegenBackend for LlvmCodegenBackend {
236 fn init(&self, sess: &Session) {
237 llvm_util::init(sess); // Make sure llvm is inited
240 fn print(&self, req: PrintRequest, sess: &Session) {
242 PrintRequest::RelocationModels => {
243 println!("Available relocation models:");
244 for &(name, _) in back::write::RELOC_MODEL_ARGS.iter() {
245 println!(" {}", name);
249 PrintRequest::CodeModels => {
250 println!("Available code models:");
251 for &(name, _) in back::write::CODE_GEN_MODEL_ARGS.iter(){
252 println!(" {}", name);
256 PrintRequest::TlsModels => {
257 println!("Available TLS models:");
258 for &(name, _) in back::write::TLS_MODEL_ARGS.iter(){
259 println!(" {}", name);
263 req => llvm_util::print(req, sess),
267 fn print_passes(&self) {
268 llvm_util::print_passes();
271 fn print_version(&self) {
272 llvm_util::print_version();
275 fn diagnostics(&self) -> &[(&'static str, &'static str)] {
279 fn target_features(&self, sess: &Session) -> Vec<Symbol> {
280 target_features(sess)
283 fn metadata_loader(&self) -> Box<dyn MetadataLoader + Sync> {
284 box metadata::LlvmMetadataLoader
287 fn provide(&self, providers: &mut ty::query::Providers<'_>) {
288 rustc_codegen_utils::symbol_names::provide(providers);
289 rustc_codegen_ssa::back::symbol_export::provide(providers);
290 rustc_codegen_ssa::base::provide_both(providers);
291 attributes::provide(providers);
294 fn provide_extern(&self, providers: &mut ty::query::Providers<'_>) {
295 rustc_codegen_ssa::back::symbol_export::provide_extern(providers);
296 rustc_codegen_ssa::base::provide_both(providers);
297 attributes::provide_extern(providers);
300 fn codegen_crate<'b, 'tcx>(
302 tcx: TyCtxt<'b, 'tcx, 'tcx>,
303 rx: mpsc::Receiver<Box<dyn Any + Send>>
305 box rustc_codegen_ssa::base::codegen_crate(LlvmCodegenBackend(()), tcx, rx)
308 fn join_codegen_and_link(
310 ongoing_codegen: Box<dyn Any>,
312 dep_graph: &DepGraph,
313 outputs: &OutputFilenames,
314 ) -> Result<(), CompileIncomplete>{
315 use rustc::util::common::time;
316 let (codegen_results, work_products) =
317 ongoing_codegen.downcast::
318 <rustc_codegen_ssa::back::write::OngoingCodegen<LlvmCodegenBackend>>()
319 .expect("Expected LlvmCodegenBackend's OngoingCodegen, found Box<Any>")
321 if sess.opts.debugging_opts.incremental_info {
322 rustc_codegen_ssa::back::write::dump_incremental_data(&codegen_results);
326 "serialize work products",
327 move || rustc_incremental::save_work_product_index(sess, &dep_graph, work_products));
329 sess.compile_status()?;
331 if !sess.opts.output_types.keys().any(|&i| i == OutputType::Exe ||
332 i == OutputType::Metadata) {
336 // Run the linker on any artifacts that resulted from the LLVM run.
337 // This should produce either a finished executable or library.
338 sess.profiler(|p| p.start_activity(ProfileCategory::Linking));
339 time(sess, "linking", || {
340 back::link::link_binary(sess, &codegen_results,
341 outputs, &codegen_results.crate_name.as_str());
343 sess.profiler(|p| p.end_activity(ProfileCategory::Linking));
345 // Now that we won't touch anything in the incremental compilation directory
346 // any more, we can finalize it (which involves renaming it)
347 rustc_incremental::finalize_session_directory(sess, codegen_results.crate_hash);
353 /// This is the entrypoint for a hot plugged rustc_codegen_llvm
355 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
356 LlvmCodegenBackend::new()
359 pub struct ModuleLlvm {
360 llcx: &'static mut llvm::Context,
361 llmod_raw: *const llvm::Module,
362 tm: &'static mut llvm::TargetMachine,
365 unsafe impl Send for ModuleLlvm { }
366 unsafe impl Sync for ModuleLlvm { }
369 fn new(tcx: TyCtxt<'_, '_, '_>, mod_name: &str) -> Self {
371 let llcx = llvm::LLVMRustContextCreate(tcx.sess.fewer_names());
372 let llmod_raw = context::create_module(tcx, llcx, mod_name) as *const _;
377 tm: create_target_machine(tcx, false),
383 cgcx: &CodegenContext<LlvmCodegenBackend>,
385 buffer: &back::lto::ModuleBuffer,
387 ) -> Result<Self, FatalError> {
389 let llcx = llvm::LLVMRustContextCreate(cgcx.fewer_names);
390 let llmod_raw = buffer.parse(name, llcx, handler)?;
391 let tm = match (cgcx.tm_factory.0)() {
394 handler.struct_err(&e).emit();
395 return Err(FatalError)
407 fn llmod(&self) -> &llvm::Module {
414 impl Drop for ModuleLlvm {
417 llvm::LLVMContextDispose(&mut *(self.llcx as *mut _));
418 llvm::LLVMRustDisposeTargetMachine(&mut *(self.tm as *mut _));
423 __build_diagnostic_array! { librustc_codegen_llvm, DIAGNOSTICS }