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