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)]
15 #![recursion_limit="256"]
17 //! This crate contains codegen code that is used by all codegen backends (LLVM and others).
18 //! The backend-agnostic functions of this crate use functions defined in various traits that
19 //! have to be implemented by each backends.
21 #[macro_use] extern crate log;
22 #[macro_use] extern crate rustc;
23 #[macro_use] extern crate syntax;
25 use std::path::PathBuf;
26 use rustc::dep_graph::WorkProduct;
27 use rustc::session::config::{OutputFilenames, OutputType};
28 use rustc::middle::lang_items::LangItem;
29 use rustc::hir::def_id::CrateNum;
30 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
31 use rustc_data_structures::sync::Lrc;
32 use rustc_data_structures::svh::Svh;
33 use rustc::middle::cstore::{LibSource, CrateSource, NativeLibrary};
34 use syntax_pos::symbol::Symbol;
36 // N.B., this module needs to be declared first so diagnostics are
37 // registered before they are used.
51 pub struct ModuleCodegen<M> {
52 /// The name of the module. When the crate may be saved between
53 /// compilations, incremental compilation requires that name be
54 /// unique amongst **all** crates. Therefore, it should contain
55 /// something unique to this crate (e.g., a module path) as well
56 /// as the crate name and disambiguator.
57 /// We currently generate these names via CodegenUnit::build_cgu_name().
63 pub const RLIB_BYTECODE_EXTENSION: &str = "bc.z";
65 impl<M> ModuleCodegen<M> {
66 pub fn into_compiled_module(self,
69 emit_bc_compressed: bool,
70 outputs: &OutputFilenames) -> CompiledModule {
71 let object = if emit_obj {
72 Some(outputs.temp_path(OutputType::Object, Some(&self.name)))
76 let bytecode = if emit_bc {
77 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name)))
81 let bytecode_compressed = if emit_bc_compressed {
82 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name))
83 .with_extension(RLIB_BYTECODE_EXTENSION))
89 name: self.name.clone(),
99 pub struct CompiledModule {
101 pub kind: ModuleKind,
102 pub object: Option<PathBuf>,
103 pub bytecode: Option<PathBuf>,
104 pub bytecode_compressed: Option<PathBuf>,
107 pub struct CachedModuleCodegen {
109 pub source: WorkProduct,
112 #[derive(Copy, Clone, Debug, PartialEq)]
113 pub enum ModuleKind {
119 bitflags::bitflags! {
120 pub struct MemFlags: u8 {
121 const VOLATILE = 1 << 0;
122 const NONTEMPORAL = 1 << 1;
123 const UNALIGNED = 1 << 2;
127 /// Misc info we load from metadata to persist beyond the tcx.
128 pub struct CrateInfo {
129 pub panic_runtime: Option<CrateNum>,
130 pub compiler_builtins: Option<CrateNum>,
131 pub profiler_runtime: Option<CrateNum>,
132 pub sanitizer_runtime: Option<CrateNum>,
133 pub is_no_builtins: FxHashSet<CrateNum>,
134 pub native_libraries: FxHashMap<CrateNum, Lrc<Vec<NativeLibrary>>>,
135 pub crate_name: FxHashMap<CrateNum, String>,
136 pub used_libraries: Lrc<Vec<NativeLibrary>>,
137 pub link_args: Lrc<Vec<String>>,
138 pub used_crate_source: FxHashMap<CrateNum, Lrc<CrateSource>>,
139 pub used_crates_static: Vec<(CrateNum, LibSource)>,
140 pub used_crates_dynamic: Vec<(CrateNum, LibSource)>,
141 pub lang_item_to_crate: FxHashMap<LangItem, CrateNum>,
142 pub missing_lang_items: FxHashMap<CrateNum, Vec<LangItem>>,
146 pub struct CodegenResults {
147 pub crate_name: Symbol,
148 pub modules: Vec<CompiledModule>,
149 pub allocator_module: Option<CompiledModule>,
150 pub metadata_module: CompiledModule,
152 pub metadata: rustc::middle::cstore::EncodedMetadata,
153 pub windows_subsystem: Option<String>,
154 pub linker_info: back::linker::LinkerInfo,
155 pub crate_info: CrateInfo,
158 __build_diagnostic_array! { librustc_codegen_ssa, DIAGNOSTICS }