1 #![feature(rustc_private)]
2 // Note: please avoid adding other feature gates where possible
3 #![warn(rust_2018_idioms)]
4 #![warn(unused_lifetimes)]
5 #![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_interface;
18 extern crate rustc_metadata;
19 extern crate rustc_session;
20 extern crate rustc_span;
21 extern crate rustc_target;
23 // This prevents duplicating functions and statics that are already part of the host rustc process.
24 #[allow(unused_extern_crates)]
25 extern crate rustc_driver;
30 use rustc_codegen_ssa::traits::CodegenBackend;
31 use rustc_codegen_ssa::CodegenResults;
32 use rustc_errors::ErrorGuaranteed;
33 use rustc_metadata::EncodedMetadata;
34 use rustc_middle::dep_graph::{WorkProduct, WorkProductId};
35 use rustc_session::config::OutputFilenames;
36 use rustc_session::Session;
37 use rustc_span::Symbol;
39 use cranelift_codegen::isa::TargetIsa;
40 use cranelift_codegen::settings::{self, Configurable};
42 pub use crate::config::*;
43 use crate::prelude::*;
53 mod compiler_builtins;
74 pub(crate) use rustc_span::{FileNameDisplayPreference, Span};
76 pub(crate) use rustc_hir::def_id::{DefId, LOCAL_CRATE};
77 pub(crate) use rustc_middle::bug;
78 pub(crate) use rustc_middle::mir::{self, *};
79 pub(crate) use rustc_middle::ty::layout::{self, LayoutOf, TyAndLayout};
80 pub(crate) use rustc_middle::ty::{
81 self, FloatTy, Instance, InstanceDef, IntTy, ParamEnv, Ty, TyCtxt, TypeAndMut,
84 pub(crate) use rustc_target::abi::{Abi, Scalar, Size, VariantIdx};
86 pub(crate) use rustc_data_structures::fx::FxHashMap;
88 pub(crate) use rustc_index::vec::Idx;
90 pub(crate) use cranelift_codegen::ir::condcodes::{FloatCC, IntCC};
91 pub(crate) use cranelift_codegen::ir::function::Function;
92 pub(crate) use cranelift_codegen::ir::types;
93 pub(crate) use cranelift_codegen::ir::{
94 AbiParam, Block, ExternalName, FuncRef, Inst, InstBuilder, MemFlags, Signature, SourceLoc,
95 StackSlot, StackSlotData, StackSlotKind, TrapCode, Type, Value,
97 pub(crate) use cranelift_codegen::isa::{self, CallConv};
98 pub(crate) use cranelift_codegen::Context;
99 pub(crate) use cranelift_frontend::{FunctionBuilder, FunctionBuilderContext, Variable};
100 pub(crate) use cranelift_module::{self, DataContext, FuncId, Linkage, Module};
102 pub(crate) use crate::abi::*;
103 pub(crate) use crate::base::{codegen_operand, codegen_place};
104 pub(crate) use crate::cast::*;
105 pub(crate) use crate::common::*;
106 pub(crate) use crate::debuginfo::{DebugContext, UnwindContext};
107 pub(crate) use crate::pointer::Pointer;
108 pub(crate) use crate::value_and_place::{CPlace, CPlaceInner, CValue};
111 struct PrintOnPanic<F: Fn() -> String>(F);
112 impl<F: Fn() -> String> Drop for PrintOnPanic<F> {
114 if ::std::thread::panicking() {
115 println!("{}", (self.0)());
120 /// The codegen context holds any information shared between the codegen of individual functions
121 /// inside a single codegen unit with the exception of the Cranelift [`Module`](cranelift_module::Module).
122 struct CodegenCx<'tcx> {
125 inline_asm_index: Cell<usize>,
126 cached_context: Context,
127 debug_context: Option<DebugContext<'tcx>>,
128 unwind_context: UnwindContext,
132 impl<'tcx> CodegenCx<'tcx> {
135 backend_config: BackendConfig,
140 assert_eq!(pointer_ty(tcx), isa.pointer_type());
143 UnwindContext::new(isa, matches!(backend_config.codegen_mode, CodegenMode::Aot));
144 let debug_context = if debug_info { Some(DebugContext::new(tcx, isa)) } else { None };
147 global_asm: String::new(),
148 inline_asm_index: Cell::new(0),
149 cached_context: Context::new(),
157 pub struct CraneliftCodegenBackend {
158 pub config: Option<BackendConfig>,
161 impl CodegenBackend for CraneliftCodegenBackend {
162 fn init(&self, sess: &Session) {
163 use rustc_session::config::Lto;
165 Lto::No | Lto::ThinLocal => {}
166 Lto::Thin | Lto::Fat => sess.warn("LTO is not supported. You may get a linker error."),
170 fn target_features(&self, _sess: &Session) -> Vec<rustc_span::Symbol> {
174 fn print_version(&self) {
175 println!("Cranelift version: {}", cranelift_codegen::VERSION);
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 if !tcx.sess.unstable_options() && !tcx.sess.opts.cg.llvm_args.is_empty() {
189 tcx.sess.fatal("`-Z unstable-options` must be passed to allow configuring cg_clif");
191 BackendConfig::from_opts(&tcx.sess.opts.cg.llvm_args)
192 .unwrap_or_else(|err| tcx.sess.fatal(&err))
194 match config.codegen_mode {
195 CodegenMode::Aot => driver::aot::run_aot(tcx, config, metadata, need_metadata_module),
196 CodegenMode::Jit | CodegenMode::JitLazy => {
197 #[cfg(feature = "jit")]
198 driver::jit::run_jit(tcx, config);
200 #[cfg(not(feature = "jit"))]
201 tcx.sess.fatal("jit support was disabled when compiling rustc_codegen_cranelift");
208 ongoing_codegen: Box<dyn Any>,
210 _outputs: &OutputFilenames,
211 ) -> Result<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>), ErrorGuaranteed> {
213 .downcast::<(CodegenResults, FxHashMap<WorkProductId, WorkProduct>)>()
220 codegen_results: CodegenResults,
221 outputs: &OutputFilenames,
222 ) -> Result<(), ErrorGuaranteed> {
223 use rustc_codegen_ssa::back::link::link_binary;
225 link_binary::<crate::archive::ArArchiveBuilder<'_>>(sess, &codegen_results, outputs)
229 fn target_triple(sess: &Session) -> target_lexicon::Triple {
230 match sess.target.llvm_target.parse() {
231 Ok(triple) => triple,
232 Err(err) => sess.fatal(&format!("target not recognized: {}", err)),
236 fn build_isa(sess: &Session, backend_config: &BackendConfig) -> Box<dyn isa::TargetIsa + 'static> {
237 use target_lexicon::BinaryFormat;
239 let target_triple = crate::target_triple(sess);
241 let mut flags_builder = settings::builder();
242 flags_builder.enable("is_pic").unwrap();
243 flags_builder.set("enable_probestack", "false").unwrap(); // __cranelift_probestack is not provided
244 let enable_verifier = if backend_config.enable_verifier { "true" } else { "false" };
245 flags_builder.set("enable_verifier", enable_verifier).unwrap();
247 let tls_model = match target_triple.binary_format {
248 BinaryFormat::Elf => "elf_gd",
249 BinaryFormat::Macho => "macho",
250 BinaryFormat::Coff => "coff",
253 flags_builder.set("tls_model", tls_model).unwrap();
255 flags_builder.set("enable_simd", "true").unwrap();
257 flags_builder.set("enable_llvm_abi_extensions", "true").unwrap();
259 flags_builder.set("regalloc", &backend_config.regalloc).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 isa_builder = match sess.opts.cg.target_cpu.as_deref() {
276 let builder = cranelift_native::builder_with_options(true).unwrap();
281 cranelift_codegen::isa::lookup(target_triple.clone()).unwrap_or_else(|err| {
282 sess.fatal(&format!("can't compile for {}: {}", target_triple, err));
284 if let Err(_) = builder.enable(value) {
285 sess.fatal("the specified target cpu isn't currently supported by Cranelift.");
291 cranelift_codegen::isa::lookup(target_triple.clone()).unwrap_or_else(|err| {
292 sess.fatal(&format!("can't compile for {}: {}", target_triple, err));
294 if target_triple.architecture == target_lexicon::Architecture::X86_64 {
295 // Don't use "haswell" as the default, as it implies `has_lzcnt`.
296 // macOS CI is still at Ivy Bridge EP, so `lzcnt` is interpreted as `bsr`.
297 builder.enable("nehalem").unwrap();
303 match isa_builder.finish(flags) {
304 Ok(target_isa) => target_isa,
305 Err(err) => sess.fatal(&format!("failed to build TargetIsa: {}", err)),
309 /// This is the entrypoint for a hot plugged rustc_codegen_cranelift
311 pub fn __rustc_codegen_backend() -> Box<dyn CodegenBackend> {
312 Box::new(CraneliftCodegenBackend { config: None })