1 // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! The Rust compiler.
15 //! This API is completely unstable and subject to change.
17 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
18 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
19 html_root_url = "https://doc.rust-lang.org/nightly/")]
21 #![feature(box_patterns)]
22 #![feature(box_syntax)]
23 #![feature(crate_visibility_modifier)]
24 #![feature(custom_attribute)]
25 #![feature(extern_types)]
26 #![feature(in_band_lifetimes)]
27 #![allow(unused_attributes)]
31 #![feature(range_contains)]
32 #![feature(rustc_diagnostic_macros)]
33 #![feature(slice_sort_by_cached_key)]
34 #![feature(optin_builtin_traits)]
35 #![feature(concat_idents)]
36 #![feature(link_args)]
37 #![feature(static_nobundle)]
39 use back::write::create_target_machine;
40 use rustc::dep_graph::WorkProduct;
41 use syntax_pos::symbol::Symbol;
43 #[macro_use] extern crate bitflags;
46 #[macro_use] extern crate rustc;
47 extern crate jobserver;
48 extern crate num_cpus;
49 extern crate rustc_mir;
50 extern crate rustc_allocator;
51 extern crate rustc_apfloat;
52 extern crate rustc_target;
53 #[macro_use] extern crate rustc_data_structures;
54 extern crate rustc_demangle;
55 extern crate rustc_incremental;
56 extern crate rustc_llvm;
57 extern crate rustc_platform_intrinsics as intrinsics;
58 extern crate rustc_codegen_utils;
59 extern crate rustc_fs_util;
61 #[macro_use] extern crate log;
62 #[macro_use] extern crate syntax;
63 extern crate syntax_pos;
64 extern crate rustc_errors as errors;
65 extern crate serialize;
66 extern crate cc; // Used to locate MSVC
67 extern crate tempfile;
70 use back::bytecode::RLIB_BYTECODE_EXTENSION;
71 use interfaces::{Backend, CommonWriteMethods};
75 pub use llvm_util::target_features;
78 use std::marker::PhantomData;
79 use libc::{c_uint, c_char};
80 use rustc_data_structures::sync::Lrc;
82 use rustc::dep_graph::DepGraph;
83 use rustc::hir::def_id::CrateNum;
84 use rustc::middle::cstore::MetadataLoader;
85 use rustc::middle::cstore::{NativeLibrary, CrateSource, LibSource};
86 use rustc::middle::lang_items::LangItem;
87 use rustc::session::{Session, CompileIncomplete};
88 use rustc::session::config::{OutputFilenames, OutputType, PrintRequest};
89 use rustc::ty::{self, TyCtxt};
90 use rustc::util::time_graph;
91 use rustc::util::nodemap::{FxHashSet, FxHashMap};
92 use rustc::util::profiling::ProfileCategory;
93 use rustc_mir::monomorphize;
94 use rustc_codegen_utils::{CompiledModule, ModuleKind};
95 use rustc_codegen_utils::codegen_backend::CodegenBackend;
96 use rustc_data_structures::svh::Svh;
127 // The following is a work around that replaces `pub mod llvm;` and that fixes issue 53912.
128 #[path = "llvm/mod.rs"] mod llvm_; pub mod llvm { pub use super::llvm_::*; }
139 pub struct LlvmCodegenBackend(());
141 impl !Send for LlvmCodegenBackend {} // Llvm is on a per-thread basis
142 impl !Sync for LlvmCodegenBackend {}
144 impl LlvmCodegenBackend {
145 pub fn new() -> Box<dyn CodegenBackend> {
146 box LlvmCodegenBackend(())
150 impl CodegenBackend for LlvmCodegenBackend {
151 fn init(&self, sess: &Session) {
152 llvm_util::init(sess); // Make sure llvm is inited
155 fn print(&self, req: PrintRequest, sess: &Session) {
157 PrintRequest::RelocationModels => {
158 println!("Available relocation models:");
159 for &(name, _) in back::write::RELOC_MODEL_ARGS.iter() {
160 println!(" {}", name);
164 PrintRequest::CodeModels => {
165 println!("Available code models:");
166 for &(name, _) in back::write::CODE_GEN_MODEL_ARGS.iter(){
167 println!(" {}", name);
171 PrintRequest::TlsModels => {
172 println!("Available TLS models:");
173 for &(name, _) in back::write::TLS_MODEL_ARGS.iter(){
174 println!(" {}", name);
178 req => llvm_util::print(req, sess),
182 fn print_passes(&self) {
183 llvm_util::print_passes();
186 fn print_version(&self) {
187 llvm_util::print_version();
190 fn diagnostics(&self) -> &[(&'static str, &'static str)] {
194 fn target_features(&self, sess: &Session) -> Vec<Symbol> {
195 target_features(sess)
198 fn metadata_loader(&self) -> Box<dyn MetadataLoader + Sync> {
199 box metadata::LlvmMetadataLoader
202 fn provide(&self, providers: &mut ty::query::Providers) {
203 rustc_codegen_utils::symbol_export::provide(providers);
204 rustc_codegen_utils::symbol_names::provide(providers);
205 base::provide_both(providers);
206 attributes::provide(providers);
209 fn provide_extern(&self, providers: &mut ty::query::Providers) {
210 rustc_codegen_utils::symbol_export::provide_extern(providers);
211 base::provide_both(providers);
212 attributes::provide_extern(providers);
215 fn codegen_crate<'a, 'tcx>(
217 tcx: TyCtxt<'a, 'tcx, 'tcx>,
218 rx: mpsc::Receiver<Box<dyn Any + Send>>
220 box base::codegen_crate(tcx, rx)
223 fn join_codegen_and_link(
225 ongoing_codegen: Box<dyn Any>,
227 dep_graph: &DepGraph,
228 outputs: &OutputFilenames,
229 ) -> Result<(), CompileIncomplete>{
230 use rustc::util::common::time;
231 let (ongoing_codegen, work_products) =
232 ongoing_codegen.downcast::<::back::write::OngoingCodegen>()
233 .expect("Expected LlvmCodegenBackend's OngoingCodegen, found Box<Any>")
235 if sess.opts.debugging_opts.incremental_info {
236 back::write::dump_incremental_data(&ongoing_codegen);
240 "serialize work products",
241 move || rustc_incremental::save_work_product_index(sess, &dep_graph, work_products));
243 sess.compile_status()?;
245 if !sess.opts.output_types.keys().any(|&i| i == OutputType::Exe ||
246 i == OutputType::Metadata) {
250 // Run the linker on any artifacts that resulted from the LLVM run.
251 // This should produce either a finished executable or library.
252 sess.profiler(|p| p.start_activity(ProfileCategory::Linking));
253 time(sess, "linking", || {
254 back::link::link_binary(sess, &ongoing_codegen,
255 outputs, &ongoing_codegen.crate_name.as_str());
257 sess.profiler(|p| p.end_activity(ProfileCategory::Linking));
259 // Now that we won't touch anything in the incremental compilation directory
260 // any more, we can finalize it (which involves renaming it)
261 rustc_incremental::finalize_session_directory(sess, ongoing_codegen.crate_hash);
267 /// This is the entrypoint for a hot plugged rustc_codegen_llvm
269 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
270 LlvmCodegenBackend::new()
273 struct ModuleCodegen {
274 /// The name of the module. When the crate may be saved between
275 /// compilations, incremental compilation requires that name be
276 /// unique amongst **all** crates. Therefore, it should contain
277 /// something unique to this crate (e.g., a module path) as well
278 /// as the crate name and disambiguator.
279 /// We currently generate these names via CodegenUnit::build_cgu_name().
281 module_llvm: ModuleLlvm<'static>,
285 struct CachedModuleCodegen {
291 fn into_compiled_module(self,
294 emit_bc_compressed: bool,
295 outputs: &OutputFilenames) -> CompiledModule {
296 let object = if emit_obj {
297 Some(outputs.temp_path(OutputType::Object, Some(&self.name)))
301 let bytecode = if emit_bc {
302 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name)))
306 let bytecode_compressed = if emit_bc_compressed {
307 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name))
308 .with_extension(RLIB_BYTECODE_EXTENSION))
314 name: self.name.clone(),
323 struct ModuleLlvm<'ll> {
324 llcx: &'static mut llvm::Context,
325 llmod_raw: *const llvm::Module,
326 tm: &'static mut llvm::TargetMachine,
327 phantom: PhantomData<&'ll ()>
330 impl<'ll> Backend for ModuleLlvm<'ll> {
331 type Value = &'ll Value;
332 type BasicBlock = &'ll llvm::BasicBlock;
333 type Type = &'ll Type;
334 type Context = &'ll llvm::Context;
337 unsafe impl Send for ModuleLlvm<'ll> { }
338 unsafe impl Sync for ModuleLlvm<'ll> { }
340 impl ModuleLlvm<'ll> {
341 fn new(sess: &Session, mod_name: &str) -> Self {
343 let llcx = llvm::LLVMRustContextCreate(sess.fewer_names());
344 let llmod_raw = context::create_module(sess, llcx, mod_name) as *const _;
349 tm: create_target_machine(sess, false),
355 fn llmod(&self) -> &llvm::Module {
362 impl CommonWriteMethods for ModuleLlvm<'ll> {
363 fn val_ty(&self, v: &'ll Value) -> &'ll Type {
369 fn c_bytes_in_context(&self, llcx: &'ll llvm::Context, bytes: &[u8]) -> &'ll Value {
371 let ptr = bytes.as_ptr() as *const c_char;
372 return llvm::LLVMConstStringInContext(
375 bytes.len() as c_uint,
380 fn c_struct_in_context(
382 llcx: &'a llvm::Context,
387 llvm::LLVMConstStructInContext(llcx,
388 elts.as_ptr(), elts.len() as c_uint,
389 packed as llvm::Bool)
394 impl Drop for ModuleLlvm<'ll> {
397 llvm::LLVMContextDispose(&mut *(self.llcx as *mut _));
398 llvm::LLVMRustDisposeTargetMachine(&mut *(self.tm as *mut _));
403 struct CodegenResults {
405 modules: Vec<CompiledModule>,
406 allocator_module: Option<CompiledModule>,
407 metadata_module: CompiledModule,
409 metadata: rustc::middle::cstore::EncodedMetadata,
410 windows_subsystem: Option<String>,
411 linker_info: rustc_codegen_utils::linker::LinkerInfo,
412 crate_info: CrateInfo,
415 /// Misc info we load from metadata to persist beyond the tcx
417 panic_runtime: Option<CrateNum>,
418 compiler_builtins: Option<CrateNum>,
419 profiler_runtime: Option<CrateNum>,
420 sanitizer_runtime: Option<CrateNum>,
421 is_no_builtins: FxHashSet<CrateNum>,
422 native_libraries: FxHashMap<CrateNum, Lrc<Vec<NativeLibrary>>>,
423 crate_name: FxHashMap<CrateNum, String>,
424 used_libraries: Lrc<Vec<NativeLibrary>>,
425 link_args: Lrc<Vec<String>>,
426 used_crate_source: FxHashMap<CrateNum, Lrc<CrateSource>>,
427 used_crates_static: Vec<(CrateNum, LibSource)>,
428 used_crates_dynamic: Vec<(CrateNum, LibSource)>,
429 wasm_imports: FxHashMap<String, String>,
430 lang_item_to_crate: FxHashMap<LangItem, CrateNum>,
431 missing_lang_items: FxHashMap<CrateNum, Vec<LangItem>>,
434 __build_diagnostic_array! { librustc_codegen_llvm, DIAGNOSTICS }