1 //! Drivers are responsible for calling [`codegen_mono_item`] and performing any further actions
2 //! like JIT executing or writing object files.
6 use rustc_middle::middle::cstore::EncodedMetadata;
7 use rustc_middle::mir::mono::{Linkage as RLinkage, MonoItem, Visibility};
10 use crate::CodegenMode;
13 #[cfg(feature = "jit")]
16 pub(crate) fn codegen_crate(
18 metadata: EncodedMetadata,
19 need_metadata_module: bool,
20 config: crate::BackendConfig,
22 tcx.sess.abort_if_errors();
24 match config.codegen_mode {
25 CodegenMode::Aot => aot::run_aot(tcx, metadata, need_metadata_module),
26 CodegenMode::Jit | CodegenMode::JitLazy => {
27 let is_executable = tcx
30 .contains(&rustc_session::config::CrateType::Executable);
32 tcx.sess.fatal("can't jit non-executable crate");
35 #[cfg(feature = "jit")]
36 let _: ! = jit::run_jit(tcx, config.codegen_mode);
38 #[cfg(not(feature = "jit"))]
40 .fatal("jit support was disabled when compiling rustc_codegen_cranelift");
45 fn predefine_mono_items<'tcx>(
46 cx: &mut crate::CodegenCx<'tcx, impl Module>,
47 mono_items: &[(MonoItem<'tcx>, (RLinkage, Visibility))],
49 cx.tcx.sess.time("predefine functions", || {
50 for &(mono_item, (linkage, visibility)) in mono_items {
52 MonoItem::Fn(instance) => {
53 let name = cx.tcx.symbol_name(instance).name.to_string();
54 let _inst_guard = crate::PrintOnPanic(|| format!("{:?} {}", instance, name));
55 let sig = get_function_sig(cx.tcx, cx.module.isa().triple(), instance);
56 let linkage = crate::linkage::get_clif_linkage(mono_item, linkage, visibility);
57 cx.module.declare_function(&name, linkage, &sig).unwrap();
59 MonoItem::Static(_) | MonoItem::GlobalAsm(_) => {}
65 fn time<R>(tcx: TyCtxt<'_>, name: &'static str, f: impl FnOnce() -> R) -> R {
66 if std::env::var("CG_CLIF_DISPLAY_CG_TIME")
71 println!("[{:<30}: {}] start", tcx.crate_name(LOCAL_CRATE), name);
72 let before = std::time::Instant::now();
73 let res = tcx.sess.time(name, f);
74 let after = std::time::Instant::now();
76 "[{:<30}: {}] end time: {:?}",
77 tcx.crate_name(LOCAL_CRATE),
83 tcx.sess.time(name, f)