1 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
3 #![feature(box_patterns)]
4 #![feature(box_syntax)]
5 #![feature(custom_attribute)]
7 #![feature(rustc_diagnostic_macros)]
8 #![feature(in_band_lifetimes)]
10 #![allow(unused_attributes)]
12 #![deny(rust_2018_idioms)]
13 #![allow(explicit_outlives_requirements)]
14 #![allow(elided_lifetimes_in_paths)]
16 #![recursion_limit="256"]
18 //! This crate contains codegen code that is used by all codegen backends (LLVM and others).
19 //! The backend-agnostic functions of this crate use functions defined in various traits that
20 //! have to be implemented by each backends.
22 #[macro_use] extern crate log;
23 #[macro_use] extern crate rustc;
24 #[macro_use] extern crate syntax;
26 use std::path::PathBuf;
27 use rustc::dep_graph::WorkProduct;
28 use rustc::session::config::{OutputFilenames, OutputType};
29 use rustc::middle::lang_items::LangItem;
30 use rustc::hir::def_id::CrateNum;
31 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
32 use rustc_data_structures::sync::Lrc;
33 use rustc_data_structures::svh::Svh;
34 use rustc::middle::cstore::{LibSource, CrateSource, NativeLibrary};
35 use syntax_pos::symbol::Symbol;
37 // N.B., this module needs to be declared first so diagnostics are
38 // registered before they are used.
52 pub struct ModuleCodegen<M> {
53 /// The name of the module. When the crate may be saved between
54 /// compilations, incremental compilation requires that name be
55 /// unique amongst **all** crates. Therefore, it should contain
56 /// something unique to this crate (e.g., a module path) as well
57 /// as the crate name and disambiguator.
58 /// We currently generate these names via CodegenUnit::build_cgu_name().
64 pub const RLIB_BYTECODE_EXTENSION: &str = "bc.z";
66 impl<M> ModuleCodegen<M> {
67 pub fn into_compiled_module(self,
70 emit_bc_compressed: bool,
71 outputs: &OutputFilenames) -> CompiledModule {
72 let object = if emit_obj {
73 Some(outputs.temp_path(OutputType::Object, Some(&self.name)))
77 let bytecode = if emit_bc {
78 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name)))
82 let bytecode_compressed = if emit_bc_compressed {
83 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name))
84 .with_extension(RLIB_BYTECODE_EXTENSION))
90 name: self.name.clone(),
100 pub struct CompiledModule {
102 pub kind: ModuleKind,
103 pub object: Option<PathBuf>,
104 pub bytecode: Option<PathBuf>,
105 pub bytecode_compressed: Option<PathBuf>,
108 pub struct CachedModuleCodegen {
110 pub source: WorkProduct,
113 #[derive(Copy, Clone, Debug, PartialEq)]
114 pub enum ModuleKind {
120 bitflags::bitflags! {
121 pub struct MemFlags: u8 {
122 const VOLATILE = 1 << 0;
123 const NONTEMPORAL = 1 << 1;
124 const UNALIGNED = 1 << 2;
128 /// Misc info we load from metadata to persist beyond the tcx.
129 pub struct CrateInfo {
130 pub panic_runtime: Option<CrateNum>,
131 pub compiler_builtins: Option<CrateNum>,
132 pub profiler_runtime: Option<CrateNum>,
133 pub sanitizer_runtime: Option<CrateNum>,
134 pub is_no_builtins: FxHashSet<CrateNum>,
135 pub native_libraries: FxHashMap<CrateNum, Lrc<Vec<NativeLibrary>>>,
136 pub crate_name: FxHashMap<CrateNum, String>,
137 pub used_libraries: Lrc<Vec<NativeLibrary>>,
138 pub link_args: Lrc<Vec<String>>,
139 pub used_crate_source: FxHashMap<CrateNum, Lrc<CrateSource>>,
140 pub used_crates_static: Vec<(CrateNum, LibSource)>,
141 pub used_crates_dynamic: Vec<(CrateNum, LibSource)>,
142 pub wasm_imports: FxHashMap<String, String>,
143 pub lang_item_to_crate: FxHashMap<LangItem, CrateNum>,
144 pub missing_lang_items: FxHashMap<CrateNum, Vec<LangItem>>,
148 pub struct CodegenResults {
149 pub crate_name: Symbol,
150 pub modules: Vec<CompiledModule>,
151 pub allocator_module: Option<CompiledModule>,
152 pub metadata_module: CompiledModule,
154 pub metadata: rustc::middle::cstore::EncodedMetadata,
155 pub windows_subsystem: Option<String>,
156 pub linker_info: back::linker::LinkerInfo,
157 pub crate_info: CrateInfo,
160 __build_diagnostic_array! { librustc_codegen_ssa, DIAGNOSTICS }