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)]
14 #![feature(associated_type_bounds)]
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 rustc_data_structures;
25 #[macro_use] extern crate syntax;
27 use std::path::PathBuf;
28 use rustc::dep_graph::WorkProduct;
29 use rustc::session::config::{OutputFilenames, OutputType};
30 use rustc::middle::lang_items::LangItem;
31 use rustc::hir::def_id::CrateNum;
32 use rustc_data_structures::fx::{FxHashMap, FxHashSet};
33 use rustc_data_structures::sync::Lrc;
34 use rustc_data_structures::svh::Svh;
35 use rustc::middle::cstore::{LibSource, CrateSource, NativeLibrary};
36 use syntax_pos::symbol::Symbol;
38 // N.B., this module needs to be declared first so diagnostics are
39 // registered before they are used.
53 pub struct ModuleCodegen<M> {
54 /// The name of the module. When the crate may be saved between
55 /// compilations, incremental compilation requires that name be
56 /// unique amongst **all** crates. Therefore, it should contain
57 /// something unique to this crate (e.g., a module path) as well
58 /// as the crate name and disambiguator.
59 /// We currently generate these names via CodegenUnit::build_cgu_name().
65 pub const METADATA_FILENAME: &str = "rust.metadata.bin";
66 pub const RLIB_BYTECODE_EXTENSION: &str = "bc.z";
68 impl<M> ModuleCodegen<M> {
69 pub fn into_compiled_module(self,
72 emit_bc_compressed: bool,
73 outputs: &OutputFilenames) -> CompiledModule {
74 let object = if emit_obj {
75 Some(outputs.temp_path(OutputType::Object, Some(&self.name)))
79 let bytecode = if emit_bc {
80 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name)))
84 let bytecode_compressed = if emit_bc_compressed {
85 Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name))
86 .with_extension(RLIB_BYTECODE_EXTENSION))
92 name: self.name.clone(),
102 pub struct CompiledModule {
104 pub kind: ModuleKind,
105 pub object: Option<PathBuf>,
106 pub bytecode: Option<PathBuf>,
107 pub bytecode_compressed: Option<PathBuf>,
110 pub struct CachedModuleCodegen {
112 pub source: WorkProduct,
115 #[derive(Copy, Clone, Debug, PartialEq)]
116 pub enum ModuleKind {
122 bitflags::bitflags! {
123 pub struct MemFlags: u8 {
124 const VOLATILE = 1 << 0;
125 const NONTEMPORAL = 1 << 1;
126 const UNALIGNED = 1 << 2;
130 /// Misc info we load from metadata to persist beyond the tcx.
132 pub struct CrateInfo {
133 pub panic_runtime: Option<CrateNum>,
134 pub compiler_builtins: Option<CrateNum>,
135 pub profiler_runtime: Option<CrateNum>,
136 pub sanitizer_runtime: Option<CrateNum>,
137 pub is_no_builtins: FxHashSet<CrateNum>,
138 pub native_libraries: FxHashMap<CrateNum, Lrc<Vec<NativeLibrary>>>,
139 pub crate_name: FxHashMap<CrateNum, String>,
140 pub used_libraries: Lrc<Vec<NativeLibrary>>,
141 pub link_args: Lrc<Vec<String>>,
142 pub used_crate_source: FxHashMap<CrateNum, Lrc<CrateSource>>,
143 pub used_crates_static: Vec<(CrateNum, LibSource)>,
144 pub used_crates_dynamic: Vec<(CrateNum, LibSource)>,
145 pub lang_item_to_crate: FxHashMap<LangItem, CrateNum>,
146 pub missing_lang_items: FxHashMap<CrateNum, Vec<LangItem>>,
150 pub struct CodegenResults {
151 pub crate_name: Symbol,
152 pub modules: Vec<CompiledModule>,
153 pub allocator_module: Option<CompiledModule>,
154 pub metadata_module: Option<CompiledModule>,
156 pub metadata: rustc::middle::cstore::EncodedMetadata,
157 pub windows_subsystem: Option<String>,
158 pub linker_info: back::linker::LinkerInfo,
159 pub crate_info: CrateInfo,
162 __build_diagnostic_array! { librustc_codegen_ssa, DIAGNOSTICS }