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lib.rs
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lib.rs
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#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
#![feature(box_patterns)]
#![feature(box_syntax)]
#![feature(core_intrinsics)]
#![feature(custom_attribute)]
#![feature(libc)]
#![feature(rustc_diagnostic_macros)]
#![feature(stmt_expr_attributes)]
#![feature(try_blocks)]
#![feature(in_band_lifetimes)]
#![feature(nll)]
#![feature(trusted_len)]
#![allow(unused_attributes)]
#![allow(dead_code)]
#![deny(rust_2018_idioms)]
#![deny(internal)]
#![allow(explicit_outlives_requirements)]
#![recursion_limit="256"]
//! This crate contains codegen code that is used by all codegen backends (LLVM and others).
//! The backend-agnostic functions of this crate use functions defined in various traits that
//! have to be implemented by each backends.
#[macro_use] extern crate log;
#[macro_use] extern crate rustc;
#[macro_use] extern crate rustc_data_structures;
#[macro_use] extern crate syntax;
use std::path::PathBuf;
use rustc::dep_graph::WorkProduct;
use rustc::session::config::{OutputFilenames, OutputType};
use rustc::middle::lang_items::LangItem;
use rustc::hir::def_id::CrateNum;
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_data_structures::sync::Lrc;
use rustc_data_structures::svh::Svh;
use rustc::middle::cstore::{LibSource, CrateSource, NativeLibrary};
use syntax_pos::symbol::Symbol;
// N.B., this module needs to be declared first so diagnostics are
// registered before they are used.
mod error_codes;
pub mod common;
pub mod traits;
pub mod mir;
pub mod debuginfo;
pub mod base;
pub mod callee;
pub mod glue;
pub mod meth;
pub mod mono_item;
pub mod back;
pub struct ModuleCodegen<M> {
/// The name of the module. When the crate may be saved between
/// compilations, incremental compilation requires that name be
/// unique amongst **all** crates. Therefore, it should contain
/// something unique to this crate (e.g., a module path) as well
/// as the crate name and disambiguator.
/// We currently generate these names via CodegenUnit::build_cgu_name().
pub name: String,
pub module_llvm: M,
pub kind: ModuleKind,
}
pub const METADATA_FILENAME: &str = "rust.metadata.bin";
pub const RLIB_BYTECODE_EXTENSION: &str = "bc.z";
impl<M> ModuleCodegen<M> {
pub fn into_compiled_module(self,
emit_obj: bool,
emit_bc: bool,
emit_bc_compressed: bool,
outputs: &OutputFilenames) -> CompiledModule {
let object = if emit_obj {
Some(outputs.temp_path(OutputType::Object, Some(&self.name)))
} else {
None
};
let bytecode = if emit_bc {
Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name)))
} else {
None
};
let bytecode_compressed = if emit_bc_compressed {
Some(outputs.temp_path(OutputType::Bitcode, Some(&self.name))
.with_extension(RLIB_BYTECODE_EXTENSION))
} else {
None
};
CompiledModule {
name: self.name.clone(),
kind: self.kind,
object,
bytecode,
bytecode_compressed,
}
}
}
#[derive(Debug)]
pub struct CompiledModule {
pub name: String,
pub kind: ModuleKind,
pub object: Option<PathBuf>,
pub bytecode: Option<PathBuf>,
pub bytecode_compressed: Option<PathBuf>,
}
pub struct CachedModuleCodegen {
pub name: String,
pub source: WorkProduct,
}
#[derive(Copy, Clone, Debug, PartialEq)]
pub enum ModuleKind {
Regular,
Metadata,
Allocator,
}
bitflags::bitflags! {
pub struct MemFlags: u8 {
const VOLATILE = 1 << 0;
const NONTEMPORAL = 1 << 1;
const UNALIGNED = 1 << 2;
}
}
/// Misc info we load from metadata to persist beyond the tcx.
pub struct CrateInfo {
pub panic_runtime: Option<CrateNum>,
pub compiler_builtins: Option<CrateNum>,
pub profiler_runtime: Option<CrateNum>,
pub sanitizer_runtime: Option<CrateNum>,
pub is_no_builtins: FxHashSet<CrateNum>,
pub native_libraries: FxHashMap<CrateNum, Lrc<Vec<NativeLibrary>>>,
pub crate_name: FxHashMap<CrateNum, String>,
pub used_libraries: Lrc<Vec<NativeLibrary>>,
pub link_args: Lrc<Vec<String>>,
pub used_crate_source: FxHashMap<CrateNum, Lrc<CrateSource>>,
pub used_crates_static: Vec<(CrateNum, LibSource)>,
pub used_crates_dynamic: Vec<(CrateNum, LibSource)>,
pub lang_item_to_crate: FxHashMap<LangItem, CrateNum>,
pub missing_lang_items: FxHashMap<CrateNum, Vec<LangItem>>,
}
pub struct CodegenResults {
pub crate_name: Symbol,
pub modules: Vec<CompiledModule>,
pub allocator_module: Option<CompiledModule>,
pub metadata_module: CompiledModule,
pub crate_hash: Svh,
pub metadata: rustc::middle::cstore::EncodedMetadata,
pub windows_subsystem: Option<String>,
pub linker_info: back::linker::LinkerInfo,
pub crate_info: CrateInfo,
}
__build_diagnostic_array! { librustc_codegen_ssa, DIAGNOSTICS }