1 #![feature(rustc_private, decl_macro, never_type, hash_drain_filter, vec_into_raw_parts)]
2 #![warn(rust_2018_idioms)]
3 #![warn(unused_lifetimes)]
4 #![warn(unreachable_pub)]
8 extern crate rustc_middle;
9 extern crate rustc_ast;
10 extern crate rustc_codegen_ssa;
11 extern crate rustc_data_structures;
12 extern crate rustc_errors;
13 extern crate rustc_fs_util;
14 extern crate rustc_hir;
15 extern crate rustc_incremental;
16 extern crate rustc_index;
17 extern crate rustc_session;
18 extern crate rustc_span;
19 extern crate rustc_target;
21 // This prevents duplicating functions and statics that are already part of the host rustc process.
22 #[allow(unused_extern_crates)]
23 extern crate rustc_driver;
27 use rustc_codegen_ssa::traits::CodegenBackend;
28 use rustc_codegen_ssa::CodegenResults;
29 use rustc_errors::ErrorReported;
30 use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
31 use rustc_middle::middle::cstore::{EncodedMetadata, MetadataLoader};
32 use rustc_middle::ty::query::Providers;
33 use rustc_session::config::OutputFilenames;
34 use rustc_session::Session;
36 use cranelift_codegen::isa::TargetIsa;
37 use cranelift_codegen::settings::{self, Configurable};
39 pub use crate::config::*;
40 use crate::prelude::*;
51 mod compiler_builtins;
73 pub(crate) use std::convert::{TryFrom, TryInto};
75 pub(crate) use rustc_span::Span;
77 pub(crate) use rustc_hir::def_id::{DefId, LOCAL_CRATE};
78 pub(crate) use rustc_middle::bug;
79 pub(crate) use rustc_middle::mir::{self, *};
80 pub(crate) use rustc_middle::ty::layout::{self, TyAndLayout};
81 pub(crate) use rustc_middle::ty::{
82 self, FloatTy, Instance, InstanceDef, IntTy, ParamEnv, Ty, TyCtxt, TypeAndMut,
85 pub(crate) use rustc_target::abi::{Abi, LayoutOf, Scalar, Size, VariantIdx};
87 pub(crate) use rustc_data_structures::fx::FxHashMap;
89 pub(crate) use rustc_index::vec::Idx;
91 pub(crate) use cranelift_codegen::ir::condcodes::{FloatCC, IntCC};
92 pub(crate) use cranelift_codegen::ir::function::Function;
93 pub(crate) use cranelift_codegen::ir::types;
94 pub(crate) use cranelift_codegen::ir::{
95 AbiParam, Block, ExternalName, FuncRef, Inst, InstBuilder, MemFlags, Signature, SourceLoc,
96 StackSlot, StackSlotData, StackSlotKind, TrapCode, Type, Value,
98 pub(crate) use cranelift_codegen::isa::{self, CallConv};
99 pub(crate) use cranelift_codegen::Context;
100 pub(crate) use cranelift_frontend::{FunctionBuilder, FunctionBuilderContext, Variable};
101 pub(crate) use cranelift_module::{self, DataContext, DataId, FuncId, Linkage, Module};
103 pub(crate) use crate::abi::*;
104 pub(crate) use crate::base::{codegen_operand, codegen_place};
105 pub(crate) use crate::cast::*;
106 pub(crate) use crate::common::*;
107 pub(crate) use crate::debuginfo::{DebugContext, UnwindContext};
108 pub(crate) use crate::pointer::Pointer;
109 pub(crate) use crate::trap::*;
110 pub(crate) use crate::value_and_place::{CPlace, CPlaceInner, CValue};
113 struct PrintOnPanic<F: Fn() -> String>(F);
114 impl<F: Fn() -> String> Drop for PrintOnPanic<F> {
116 if ::std::thread::panicking() {
117 println!("{}", (self.0)());
122 /// The codegen context holds any information shared between the codegen of individual functions
123 /// inside a single codegen unit with the exception of the Cranelift [`Module`](cranelift_module::Module).
124 struct CodegenCx<'tcx> {
127 cached_context: Context,
128 debug_context: Option<DebugContext<'tcx>>,
129 unwind_context: UnwindContext,
132 impl<'tcx> CodegenCx<'tcx> {
135 backend_config: BackendConfig,
139 assert_eq!(pointer_ty(tcx), isa.pointer_type());
142 UnwindContext::new(tcx, isa, matches!(backend_config.codegen_mode, CodegenMode::Aot));
143 let debug_context = if debug_info { Some(DebugContext::new(tcx, isa)) } else { None };
146 global_asm: String::new(),
147 cached_context: Context::new(),
154 pub struct CraneliftCodegenBackend {
155 pub config: Option<BackendConfig>,
158 impl CodegenBackend for CraneliftCodegenBackend {
159 fn init(&self, sess: &Session) {
160 use rustc_session::config::Lto;
162 Lto::No | Lto::ThinLocal => {}
163 Lto::Thin | Lto::Fat => sess.warn("LTO is not supported. You may get a linker error."),
167 fn metadata_loader(&self) -> Box<dyn MetadataLoader + Sync> {
168 Box::new(crate::metadata::CraneliftMetadataLoader)
171 fn provide(&self, _providers: &mut Providers) {}
172 fn provide_extern(&self, _providers: &mut Providers) {}
174 fn target_features(&self, _sess: &Session) -> Vec<rustc_span::Symbol> {
181 metadata: EncodedMetadata,
182 need_metadata_module: bool,
184 tcx.sess.abort_if_errors();
185 let config = if let Some(config) = self.config.clone() {
188 BackendConfig::from_opts(&tcx.sess.opts.cg.llvm_args)
189 .unwrap_or_else(|err| tcx.sess.fatal(&err))
191 match config.codegen_mode {
192 CodegenMode::Aot => driver::aot::run_aot(tcx, config, metadata, need_metadata_module),
193 CodegenMode::Jit | CodegenMode::JitLazy => {
194 #[cfg(feature = "jit")]
195 let _: ! = driver::jit::run_jit(tcx, config);
197 #[cfg(not(feature = "jit"))]
198 tcx.sess.fatal("jit support was disabled when compiling rustc_codegen_cranelift");
205 ongoing_codegen: Box<dyn Any>,
207 ) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorReported> {
209 .downcast::<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>)>()
216 codegen_results: CodegenResults,
217 outputs: &OutputFilenames,
218 ) -> Result<(), ErrorReported> {
219 use rustc_codegen_ssa::back::link::link_binary;
221 let target_cpu = crate::target_triple(sess).to_string();
222 link_binary::<crate::archive::ArArchiveBuilder<'_>>(
226 &codegen_results.crate_name.as_str(),
234 fn target_triple(sess: &Session) -> target_lexicon::Triple {
235 sess.target.llvm_target.parse().unwrap()
238 fn build_isa(sess: &Session, backend_config: &BackendConfig) -> Box<dyn isa::TargetIsa + 'static> {
239 use target_lexicon::BinaryFormat;
241 let target_triple = crate::target_triple(sess);
243 let mut flags_builder = settings::builder();
244 flags_builder.enable("is_pic").unwrap();
245 flags_builder.set("enable_probestack", "false").unwrap(); // __cranelift_probestack is not provided
246 let enable_verifier = if backend_config.enable_verifier { "true" } else { "false" };
247 flags_builder.set("enable_verifier", enable_verifier).unwrap();
249 let tls_model = match target_triple.binary_format {
250 BinaryFormat::Elf => "elf_gd",
251 BinaryFormat::Macho => "macho",
252 BinaryFormat::Coff => "coff",
255 flags_builder.set("tls_model", tls_model).unwrap();
257 flags_builder.set("enable_simd", "true").unwrap();
259 flags_builder.set("enable_llvm_abi_extensions", "true").unwrap();
261 use rustc_session::config::OptLevel;
262 match sess.opts.optimize {
264 flags_builder.set("opt_level", "none").unwrap();
266 OptLevel::Less | OptLevel::Default => {}
267 OptLevel::Size | OptLevel::SizeMin | OptLevel::Aggressive => {
268 flags_builder.set("opt_level", "speed_and_size").unwrap();
272 let flags = settings::Flags::new(flags_builder);
274 let variant = cranelift_codegen::isa::BackendVariant::MachInst;
276 let isa_builder = match sess.opts.cg.target_cpu.as_deref() {
278 let builder = cranelift_native::builder_with_options(variant, true).unwrap();
282 let mut builder = cranelift_codegen::isa::lookup_variant(target_triple, variant).unwrap();
283 if let Err(_) = builder.enable(value) {
284 sess.fatal("The specified target cpu isn't currently supported by Cranelift.");
289 let mut builder = cranelift_codegen::isa::lookup_variant(target_triple, variant).unwrap();
290 // Don't use "haswell" as the default, as it implies `has_lzcnt`.
291 // macOS CI is still at Ivy Bridge EP, so `lzcnt` is interpreted as `bsr`.
292 builder.enable("nehalem").unwrap();
297 isa_builder.finish(flags)
300 /// This is the entrypoint for a hot plugged rustc_codegen_cranelift
302 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
303 Box::new(CraneliftCodegenBackend { config: None })