-#![feature(
- rustc_private,
- decl_macro,
- type_alias_impl_trait,
- associated_type_bounds,
- never_type,
- try_blocks
-)]
+#![feature(rustc_private, decl_macro, never_type, hash_drain_filter, vec_into_raw_parts, once_cell)]
#![warn(rust_2018_idioms)]
#![warn(unused_lifetimes)]
+#![warn(unreachable_pub)]
-extern crate flate2;
-#[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_mir;
extern crate rustc_session;
extern crate rustc_span;
-extern crate rustc_symbol_mangling;
extern crate rustc_target;
// This prevents duplicating functions and statics that are already part of the host rustc process.
use rustc_codegen_ssa::traits::CodegenBackend;
use rustc_codegen_ssa::CodegenResults;
use rustc_errors::ErrorReported;
-use rustc_middle::dep_graph::{DepGraph, WorkProduct, WorkProductId};
-use rustc_middle::middle::cstore::{EncodedMetadata, MetadataLoader};
-use rustc_middle::ty::query::Providers;
+use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
+use rustc_middle::middle::cstore::EncodedMetadata;
use rustc_session::config::OutputFilenames;
use rustc_session::Session;
+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 optimize;
mod pointer;
mod pretty_clif;
-mod target_features_whitelist;
mod toolchain;
mod trap;
mod unsize;
mod prelude {
pub(crate) use std::convert::{TryFrom, TryInto};
- pub(crate) use rustc_ast::ast::{FloatTy, IntTy, UintTy};
pub(crate) use rustc_span::Span;
pub(crate) use rustc_hir::def_id::{DefId, LOCAL_CRATE};
pub(crate) use rustc_middle::mir::{self, *};
pub(crate) use rustc_middle::ty::layout::{self, TyAndLayout};
pub(crate) use rustc_middle::ty::{
- self, FnSig, Instance, InstanceDef, ParamEnv, Ty, TyCtxt, TypeAndMut, TypeFoldable,
+ self, FloatTy, Instance, InstanceDef, IntTy, ParamEnv, Ty, TyCtxt, TypeAndMut,
+ TypeFoldable, UintTy,
};
pub(crate) use rustc_target::abi::{Abi, LayoutOf, Scalar, Size, VariantIdx};
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, Backend, 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::{trans_operand, trans_place};
+ pub(crate) use crate::base::{codegen_operand, codegen_place};
pub(crate) use crate::cast::*;
pub(crate) use crate::common::*;
pub(crate) use crate::debuginfo::{DebugContext, UnwindContext};
}
}
-struct CodegenCx<'tcx, B: Backend + 'static> {
+/// 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: Module<B>,
global_asm: String,
- constants_cx: ConstantCx,
cached_context: Context,
- vtables: FxHashMap<(Ty<'tcx>, Option<ty::PolyExistentialTraitRef<'tcx>>), DataId>,
debug_context: Option<DebugContext<'tcx>>,
- unwind_context: UnwindContext<'tcx>,
+ unwind_context: UnwindContext,
}
-impl<'tcx, B: Backend + 'static> CodegenCx<'tcx, B> {
- fn new(tcx: TyCtxt<'tcx>, module: Module<B>, debug_info: bool) -> Self {
- let unwind_context = UnwindContext::new(tcx, module.isa());
- let debug_context = if debug_info {
- Some(DebugContext::new(tcx, module.isa()))
- } else {
- None
- };
+impl<'tcx> CodegenCx<'tcx> {
+ fn new(
+ tcx: TyCtxt<'tcx>,
+ backend_config: BackendConfig,
+ isa: &dyn TargetIsa,
+ debug_info: bool,
+ ) -> Self {
+ assert_eq!(pointer_ty(tcx), isa.pointer_type());
+
+ let unwind_context =
+ UnwindContext::new(tcx, isa, matches!(backend_config.codegen_mode, CodegenMode::Aot));
+ let debug_context = if debug_info { Some(DebugContext::new(tcx, isa)) } else { None };
CodegenCx {
tcx,
- module,
global_asm: String::new(),
- constants_cx: ConstantCx::default(),
cached_context: Context::new(),
- vtables: FxHashMap::default(),
debug_context,
unwind_context,
}
}
-
- fn finalize(
- mut self,
- ) -> (
- Module<B>,
- 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,
- )
- }
}
-struct CraneliftCodegenBackend;
+pub struct CraneliftCodegenBackend {
+ pub config: Option<BackendConfig>,
+}
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 provide(&self, providers: &mut Providers) {
- providers.supported_target_features = |tcx, cnum| {
- assert_eq!(cnum, LOCAL_CRATE);
- if tcx.sess.opts.actually_rustdoc {
- // rustdoc needs to be able to document functions that use all the features, so
- // whitelist them all
- target_features_whitelist::all_known_features()
- .map(|(a, b)| (a.to_string(), b))
- .collect()
- } else {
- target_features_whitelist::supported_target_features(tcx.sess)
- .iter()
- .map(|&(a, b)| (a.to_string(), b))
- .collect()
- }
- };
- }
- fn provide_extern(&self, _providers: &mut Providers) {}
-
fn target_features(&self, _sess: &Session) -> Vec<rustc_span::Symbol> {
vec![]
}
- fn codegen_crate<'tcx>(
+ fn print_version(&self) {
+ println!("Cranelift version: {}", cranelift_codegen::VERSION);
+ }
+
+ fn codegen_crate(
&self,
- tcx: TyCtxt<'tcx>,
+ tcx: TyCtxt<'_>,
metadata: EncodedMetadata,
need_metadata_module: bool,
) -> Box<dyn Any> {
- let res = driver::codegen_crate(tcx, metadata, need_metadata_module);
-
- rustc_symbol_mangling::test::report_symbol_names(tcx);
-
- res
+ 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))
+ };
+ match config.codegen_mode {
+ CodegenMode::Aot => driver::aot::run_aot(tcx, config, metadata, need_metadata_module),
+ CodegenMode::Jit | CodegenMode::JitLazy => {
+ #[cfg(feature = "jit")]
+ let _: ! = 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,
- dep_graph: &DepGraph,
- ) -> Result<Box<dyn Any>, ErrorReported> {
- let (codegen_results, work_products) = *ongoing_codegen
+ _sess: &Session,
+ ) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorReported> {
+ Ok(*ongoing_codegen
.downcast::<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>)>()
- .unwrap();
-
- sess.time("serialize_work_products", move || {
- rustc_incremental::save_work_product_index(sess, &dep_graph, work_products)
- });
-
- Ok(Box::new(codegen_results))
+ .unwrap())
}
fn link(
&self,
sess: &Session,
- res: Box<dyn Any>,
+ codegen_results: CodegenResults,
outputs: &OutputFilenames,
) -> Result<(), ErrorReported> {
use rustc_codegen_ssa::back::link::link_binary;
- sess.abort_if_errors();
-
- let codegen_results = *res
- .downcast::<CodegenResults>()
- .expect("Expected CraneliftCodegenBackend's CodegenResult, found Box<Any>");
-
- let _timer = sess.prof.generic_activity("link_crate");
-
- sess.time("linking", || {
- 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,
- );
- });
-
- rustc_incremental::finalize_session_directory(sess, codegen_results.crate_hash);
-
- Ok(())
+ link_binary::<crate::archive::ArArchiveBuilder<'_>>(sess, &codegen_results, outputs)
}
}
fn target_triple(sess: &Session) -> target_lexicon::Triple {
- sess.target.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, enable_pic: bool) -> 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();
- if enable_pic {
- flags_builder.enable("is_pic").unwrap();
- } else {
- flags_builder.set("is_pic", "false").unwrap();
- }
+ 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();
let tls_model = match target_triple.binary_format {
BinaryFormat::Elf => "elf_gd",
flags_builder.set("enable_simd", "true").unwrap();
- // FIXME(CraneStation/cranelift#732) fix LICM in presence of jump tables
- /*
+ flags_builder.set("enable_llvm_abi_extensions", "true").unwrap();
+
+ flags_builder.set("regalloc", &backend_config.regalloc).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 mut isa_builder = cranelift_codegen::isa::lookup(target_triple).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();
+ let variant = 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(variant, true).unwrap();
+ builder
+ }
+ Some(value) => {
+ let mut builder =
+ cranelift_codegen::isa::lookup_variant(target_triple.clone(), variant)
+ .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_variant(target_triple.clone(), variant)
+ .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
+ }
+ };
+
isa_builder.finish(flags)
}
/// This is the entrypoint for a hot plugged rustc_codegen_cranelift
#[no_mangle]
pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
- Box::new(CraneliftCodegenBackend)
+ Box::new(CraneliftCodegenBackend { config: None })
}
projects / rust.git / blobdiff