-#![feature(
- rustc_private,
- decl_macro,
- type_alias_impl_trait,
- associated_type_bounds,
- never_type,
- try_blocks,
- hash_drain_filter
-)]
+#![feature(rustc_private)]
+// Note: please avoid adding other feature gates where possible
#![warn(rust_2018_idioms)]
#![warn(unused_lifetimes)]
#![warn(unreachable_pub)]
-#[cfg(feature = "jit")]
-extern crate libc;
-extern crate snap;
#[macro_use]
extern crate rustc_middle;
extern crate rustc_ast;
extern crate rustc_hir;
extern crate rustc_incremental;
extern crate rustc_index;
+extern crate rustc_interface;
+extern crate rustc_metadata;
extern crate rustc_session;
extern crate rustc_span;
extern crate rustc_target;
extern crate rustc_driver;
use std::any::Any;
-use std::str::FromStr;
+use std::cell::Cell;
use rustc_codegen_ssa::traits::CodegenBackend;
use rustc_codegen_ssa::CodegenResults;
-use rustc_errors::ErrorReported;
+use rustc_errors::ErrorGuaranteed;
+use rustc_metadata::EncodedMetadata;
use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
-use rustc_middle::middle::cstore::{EncodedMetadata, MetadataLoader};
-use rustc_middle::ty::query::Providers;
use rustc_session::config::OutputFilenames;
use rustc_session::Session;
+use rustc_span::Symbol;
+use cranelift_codegen::isa::TargetIsa;
use cranelift_codegen::settings::{self, Configurable};
-use crate::constant::ConstantCx;
+pub use crate::config::*;
use crate::prelude::*;
mod abi;
mod allocator;
mod analyze;
mod archive;
-mod atomic_shim;
-mod backend;
mod base;
mod cast;
mod codegen_i128;
mod common;
+mod compiler_builtins;
+mod config;
mod constant;
mod debuginfo;
mod discriminant;
mod intrinsics;
mod linkage;
mod main_shim;
-mod metadata;
mod num;
mod optimize;
mod pointer;
mod vtable;
mod prelude {
- pub(crate) use std::convert::{TryFrom, TryInto};
-
- pub(crate) use rustc_span::Span;
+ pub(crate) use rustc_span::{FileNameDisplayPreference, Span};
pub(crate) use rustc_hir::def_id::{DefId, LOCAL_CRATE};
pub(crate) use rustc_middle::bug;
pub(crate) use rustc_middle::mir::{self, *};
- pub(crate) use rustc_middle::ty::layout::{self, TyAndLayout};
+ pub(crate) use rustc_middle::ty::layout::{self, LayoutOf, TyAndLayout};
pub(crate) use rustc_middle::ty::{
self, FloatTy, Instance, InstanceDef, IntTy, ParamEnv, Ty, TyCtxt, TypeAndMut,
- TypeFoldable, UintTy,
+ TypeFoldable, TypeVisitable, UintTy,
};
- pub(crate) use rustc_target::abi::{Abi, LayoutOf, Scalar, Size, VariantIdx};
+ pub(crate) use rustc_target::abi::{Abi, Scalar, Size, VariantIdx};
pub(crate) use rustc_data_structures::fx::FxHashMap;
pub(crate) use rustc_index::vec::Idx;
- pub(crate) use cranelift_codegen::entity::EntitySet;
pub(crate) use cranelift_codegen::ir::condcodes::{FloatCC, IntCC};
pub(crate) use cranelift_codegen::ir::function::Function;
pub(crate) use cranelift_codegen::ir::types;
pub(crate) use cranelift_codegen::isa::{self, CallConv};
pub(crate) use cranelift_codegen::Context;
pub(crate) use cranelift_frontend::{FunctionBuilder, FunctionBuilderContext, Variable};
- pub(crate) use cranelift_module::{self, DataContext, DataId, FuncId, Linkage, Module};
+ pub(crate) use cranelift_module::{self, DataContext, FuncId, Linkage, Module};
pub(crate) use crate::abi::*;
pub(crate) use crate::base::{codegen_operand, codegen_place};
pub(crate) use crate::common::*;
pub(crate) use crate::debuginfo::{DebugContext, UnwindContext};
pub(crate) use crate::pointer::Pointer;
- pub(crate) use crate::trap::*;
pub(crate) use crate::value_and_place::{CPlace, CPlaceInner, CValue};
}
}
}
-struct CodegenCx<'tcx, M: Module> {
+/// The codegen context holds any information shared between the codegen of individual functions
+/// inside a single codegen unit with the exception of the Cranelift [`Module`](cranelift_module::Module).
+struct CodegenCx<'tcx> {
tcx: TyCtxt<'tcx>,
- module: M,
global_asm: String,
- constants_cx: ConstantCx,
+ inline_asm_index: Cell<usize>,
cached_context: Context,
- vtables: FxHashMap<(Ty<'tcx>, Option<ty::PolyExistentialTraitRef<'tcx>>), DataId>,
debug_context: Option<DebugContext<'tcx>>,
- unwind_context: UnwindContext<'tcx>,
+ unwind_context: UnwindContext,
+ cgu_name: Symbol,
}
-impl<'tcx, M: Module> CodegenCx<'tcx, M> {
- fn new(tcx: TyCtxt<'tcx>, module: M, debug_info: bool, pic_eh_frame: bool) -> Self {
- let unwind_context = UnwindContext::new(tcx, module.isa(), pic_eh_frame);
- let debug_context = if debug_info {
- Some(DebugContext::new(tcx, module.isa()))
+impl<'tcx> CodegenCx<'tcx> {
+ fn new(
+ tcx: TyCtxt<'tcx>,
+ backend_config: BackendConfig,
+ isa: &dyn TargetIsa,
+ debug_info: bool,
+ cgu_name: Symbol,
+ ) -> Self {
+ assert_eq!(pointer_ty(tcx), isa.pointer_type());
+
+ let unwind_context =
+ UnwindContext::new(isa, matches!(backend_config.codegen_mode, CodegenMode::Aot));
+ let debug_context = if debug_info && !tcx.sess.target.options.is_like_windows {
+ Some(DebugContext::new(tcx, isa))
} else {
None
};
CodegenCx {
tcx,
- module,
global_asm: String::new(),
- constants_cx: ConstantCx::default(),
+ inline_asm_index: Cell::new(0),
cached_context: Context::new(),
- vtables: FxHashMap::default(),
debug_context,
unwind_context,
+ cgu_name,
}
}
-
- fn finalize(mut self) -> (M, String, Option<DebugContext<'tcx>>, UnwindContext<'tcx>) {
- self.constants_cx.finalize(self.tcx, &mut self.module);
- (
- self.module,
- self.global_asm,
- self.debug_context,
- self.unwind_context,
- )
- }
-}
-
-#[derive(Copy, Clone, Debug)]
-pub enum CodegenMode {
- Aot,
- Jit,
- JitLazy,
-}
-
-impl Default for CodegenMode {
- fn default() -> Self {
- CodegenMode::Aot
- }
-}
-
-impl FromStr for CodegenMode {
- type Err = String;
-
- fn from_str(s: &str) -> Result<Self, Self::Err> {
- match s {
- "aot" => Ok(CodegenMode::Aot),
- "jit" => Ok(CodegenMode::Jit),
- "jit-lazy" => Ok(CodegenMode::JitLazy),
- _ => Err(format!("Unknown codegen mode `{}`", s)),
- }
- }
-}
-
-#[derive(Copy, Clone, Debug, Default)]
-pub struct BackendConfig {
- pub codegen_mode: CodegenMode,
-}
-
-impl BackendConfig {
- fn from_opts(opts: &[String]) -> Result<Self, String> {
- let mut config = BackendConfig::default();
- for opt in opts {
- if let Some((name, value)) = opt.split_once('=') {
- match name {
- "mode" => config.codegen_mode = value.parse()?,
- _ => return Err(format!("Unknown option `{}`", name)),
- }
- } else {
- return Err(format!("Invalid option `{}`", opt));
- }
- }
- Ok(config)
- }
}
pub struct CraneliftCodegenBackend {
impl CodegenBackend for CraneliftCodegenBackend {
fn init(&self, sess: &Session) {
- if sess.lto() != rustc_session::config::Lto::No && sess.opts.cg.embed_bitcode {
- sess.warn("LTO is not supported. You may get a linker error.");
+ use rustc_session::config::Lto;
+ match sess.lto() {
+ Lto::No | Lto::ThinLocal => {}
+ Lto::Thin | Lto::Fat => sess.warn("LTO is not supported. You may get a linker error."),
}
}
- fn metadata_loader(&self) -> Box<dyn MetadataLoader + Sync> {
- Box::new(crate::metadata::CraneliftMetadataLoader)
+ fn target_features(&self, _sess: &Session, _allow_unstable: bool) -> Vec<rustc_span::Symbol> {
+ vec![]
}
- fn provide(&self, _providers: &mut Providers) {}
- fn provide_extern(&self, _providers: &mut Providers) {}
-
- fn target_features(&self, _sess: &Session) -> Vec<rustc_span::Symbol> {
- vec![]
+ fn print_version(&self) {
+ println!("Cranelift version: {}", cranelift_codegen::VERSION);
}
- fn codegen_crate<'tcx>(
+ fn codegen_crate(
&self,
- tcx: TyCtxt<'tcx>,
+ tcx: TyCtxt<'_>,
metadata: EncodedMetadata,
need_metadata_module: bool,
) -> Box<dyn Any> {
- let config = if let Some(config) = self.config {
+ tcx.sess.abort_if_errors();
+ let config = if let Some(config) = self.config.clone() {
config
} else {
+ if !tcx.sess.unstable_options() && !tcx.sess.opts.cg.llvm_args.is_empty() {
+ tcx.sess.fatal("`-Z unstable-options` must be passed to allow configuring cg_clif");
+ }
BackendConfig::from_opts(&tcx.sess.opts.cg.llvm_args)
.unwrap_or_else(|err| tcx.sess.fatal(&err))
};
- let res = driver::codegen_crate(tcx, metadata, need_metadata_module, config);
-
- res
+ match config.codegen_mode {
+ CodegenMode::Aot => driver::aot::run_aot(tcx, config, metadata, need_metadata_module),
+ CodegenMode::Jit | CodegenMode::JitLazy => {
+ #[cfg(feature = "jit")]
+ driver::jit::run_jit(tcx, config);
+
+ #[cfg(not(feature = "jit"))]
+ tcx.sess.fatal("jit support was disabled when compiling rustc_codegen_cranelift");
+ }
+ }
}
fn join_codegen(
&self,
ongoing_codegen: Box<dyn Any>,
_sess: &Session,
- ) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorReported> {
+ _outputs: &OutputFilenames,
+ ) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorGuaranteed> {
Ok(*ongoing_codegen
.downcast::<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>)>()
.unwrap())
sess: &Session,
codegen_results: CodegenResults,
outputs: &OutputFilenames,
- ) -> Result<(), ErrorReported> {
+ ) -> Result<(), ErrorGuaranteed> {
use rustc_codegen_ssa::back::link::link_binary;
- let target_cpu = crate::target_triple(sess).to_string();
- link_binary::<crate::archive::ArArchiveBuilder<'_>>(
- sess,
- &codegen_results,
- outputs,
- &codegen_results.crate_name.as_str(),
- &target_cpu,
- );
-
- Ok(())
+ link_binary::<crate::archive::ArArchiveBuilder<'_>>(sess, &codegen_results, outputs)
}
}
fn target_triple(sess: &Session) -> target_lexicon::Triple {
- sess.target.llvm_target.parse().unwrap()
+ match sess.target.llvm_target.parse() {
+ Ok(triple) => triple,
+ Err(err) => sess.fatal(&format!("target not recognized: {}", err)),
+ }
}
-fn build_isa(sess: &Session) -> Box<dyn isa::TargetIsa + 'static> {
+fn build_isa(sess: &Session, backend_config: &BackendConfig) -> Box<dyn isa::TargetIsa + 'static> {
use target_lexicon::BinaryFormat;
let target_triple = crate::target_triple(sess);
let mut flags_builder = settings::builder();
flags_builder.enable("is_pic").unwrap();
flags_builder.set("enable_probestack", "false").unwrap(); // __cranelift_probestack is not provided
- flags_builder
- .set(
- "enable_verifier",
- if cfg!(debug_assertions) {
- "true"
- } else {
- "false"
- },
- )
- .unwrap();
+ let enable_verifier = if backend_config.enable_verifier { "true" } else { "false" };
+ flags_builder.set("enable_verifier", enable_verifier).unwrap();
+ flags_builder.set("regalloc_checker", enable_verifier).unwrap();
let tls_model = match target_triple.binary_format {
BinaryFormat::Elf => "elf_gd",
flags_builder.set("enable_simd", "true").unwrap();
+ flags_builder.set("enable_llvm_abi_extensions", "true").unwrap();
+
use rustc_session::config::OptLevel;
match sess.opts.optimize {
OptLevel::No => {
flags_builder.set("opt_level", "none").unwrap();
}
OptLevel::Less | OptLevel::Default => {}
- OptLevel::Aggressive => {
+ OptLevel::Size | OptLevel::SizeMin | OptLevel::Aggressive => {
flags_builder.set("opt_level", "speed_and_size").unwrap();
}
- OptLevel::Size | OptLevel::SizeMin => {
- sess.warn("Optimizing for size is not supported. Just ignoring the request");
- }
}
let flags = settings::Flags::new(flags_builder);
- let variant = if cfg!(feature = "oldbe") {
- cranelift_codegen::isa::BackendVariant::Legacy
- } else {
- cranelift_codegen::isa::BackendVariant::MachInst
+ let isa_builder = match sess.opts.cg.target_cpu.as_deref() {
+ Some("native") => {
+ let builder = cranelift_native::builder_with_options(true).unwrap();
+ builder
+ }
+ Some(value) => {
+ let mut builder =
+ cranelift_codegen::isa::lookup(target_triple.clone()).unwrap_or_else(|err| {
+ sess.fatal(&format!("can't compile for {}: {}", target_triple, err));
+ });
+ if let Err(_) = builder.enable(value) {
+ sess.fatal("the specified target cpu isn't currently supported by Cranelift.");
+ }
+ builder
+ }
+ None => {
+ let mut builder =
+ cranelift_codegen::isa::lookup(target_triple.clone()).unwrap_or_else(|err| {
+ sess.fatal(&format!("can't compile for {}: {}", target_triple, err));
+ });
+ if target_triple.architecture == target_lexicon::Architecture::X86_64 {
+ // Don't use "haswell" as the default, as it implies `has_lzcnt`.
+ // macOS CI is still at Ivy Bridge EP, so `lzcnt` is interpreted as `bsr`.
+ builder.enable("nehalem").unwrap();
+ }
+ builder
+ }
};
- let mut isa_builder = cranelift_codegen::isa::lookup_variant(target_triple, variant).unwrap();
- // Don't use "haswell", as it implies `has_lzcnt`.macOS CI is still at Ivy Bridge EP, so `lzcnt`
- // is interpreted as `bsr`.
- isa_builder.enable("nehalem").unwrap();
- isa_builder.finish(flags)
+
+ match isa_builder.finish(flags) {
+ Ok(target_isa) => target_isa,
+ Err(err) => sess.fatal(&format!("failed to build TargetIsa: {}", err)),
+ }
}
/// This is the entrypoint for a hot plugged rustc_codegen_cranelift
projects / rust.git / blobdiff