-#![feature(
- rustc_private,
- decl_macro,
- type_alias_impl_trait,
- associated_type_bounds,
- never_type,
- try_blocks,
- hash_drain_filter
-)]
+#![feature(rustc_private, decl_macro, never_type, hash_drain_filter, vec_into_raw_parts)]
#![warn(rust_2018_idioms)]
#![warn(unused_lifetimes)]
#![warn(unreachable_pub)]
extern crate rustc_driver;
use std::any::Any;
-use std::str::FromStr;
use rustc_codegen_ssa::traits::CodegenBackend;
use rustc_codegen_ssa::CodegenResults;
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 cast;
mod codegen_i128;
mod common;
+mod compiler_builtins;
+mod config;
mod constant;
mod debuginfo;
mod discriminant;
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;
}
}
-struct CodegenCx<'m, 'tcx: 'm> {
+/// 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 mut dyn Module,
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<'m, 'tcx> CodegenCx<'m, 'tcx> {
+impl<'tcx> CodegenCx<'tcx> {
fn new(
tcx: TyCtxt<'tcx>,
backend_config: BackendConfig,
- module: &'m mut dyn Module,
+ isa: &dyn TargetIsa,
debug_info: bool,
) -> Self {
- let unwind_context = UnwindContext::new(
- tcx,
- module.isa(),
- matches!(backend_config.codegen_mode, CodegenMode::Aot),
- );
- let debug_context =
- if debug_info { Some(DebugContext::new(tcx, module.isa())) } else { None };
+ 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(self) -> (String, Option<DebugContext<'tcx>>, UnwindContext<'tcx>) {
- self.constants_cx.finalize(self.tcx, 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."),
}
}
vec![]
}
- 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 {
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")]
+ 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(
sess.target.llvm_target.parse().unwrap()
}
-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
- let enable_verifier =
- cfg!(debug_assertions) || std::env::var("CG_CLIF_ENABLE_VERIFIER").is_ok();
- flags_builder.set("enable_verifier", if enable_verifier { "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("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 = cranelift_codegen::isa::BackendVariant::MachInst;
- 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();
+
+ 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, variant).unwrap();
+ 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, variant).unwrap();
+ // 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)
}
projects / rust.git / blobdiff