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|
//! Drivers are responsible for calling [`codegen_mono_items`] and performing any further actions
//! like JIT executing or writing object files.
use std::any::Any;
use rustc_middle::middle::cstore::EncodedMetadata;
use rustc_middle::mir::mono::{Linkage as RLinkage, MonoItem, Visibility};
use crate::prelude::*;
mod aot;
#[cfg(feature = "jit")]
mod jit;
pub(crate) fn codegen_crate(
tcx: TyCtxt<'_>,
metadata: EncodedMetadata,
need_metadata_module: bool,
config: crate::BackendConfig,
) -> Box<dyn Any> {
tcx.sess.abort_if_errors();
if config.use_jit {
let is_executable = tcx
.sess
.crate_types()
.contains(&rustc_session::config::CrateType::Executable);
if !is_executable {
tcx.sess.fatal("can't jit non-executable crate");
}
#[cfg(feature = "jit")]
let _: ! = jit::run_jit(tcx);
#[cfg(not(feature = "jit"))]
tcx.sess
.fatal("jit support was disabled when compiling rustc_codegen_cranelift");
}
aot::run_aot(tcx, metadata, need_metadata_module)
}
fn codegen_mono_items<'tcx>(
cx: &mut crate::CodegenCx<'tcx, impl Module>,
mono_items: Vec<(MonoItem<'tcx>, (RLinkage, Visibility))>,
) {
cx.tcx.sess.time("predefine functions", || {
for &(mono_item, (linkage, visibility)) in &mono_items {
match mono_item {
MonoItem::Fn(instance) => {
let (name, sig) = get_function_name_and_sig(
cx.tcx,
cx.module.isa().triple(),
instance,
false,
);
let linkage = crate::linkage::get_clif_linkage(mono_item, linkage, visibility);
cx.module.declare_function(&name, linkage, &sig).unwrap();
}
MonoItem::Static(_) | MonoItem::GlobalAsm(_) => {}
}
}
});
for (mono_item, (linkage, visibility)) in mono_items {
let linkage = crate::linkage::get_clif_linkage(mono_item, linkage, visibility);
codegen_mono_item(cx, mono_item, linkage);
}
}
fn codegen_mono_item<'tcx, M: Module>(
cx: &mut crate::CodegenCx<'tcx, M>,
mono_item: MonoItem<'tcx>,
linkage: Linkage,
) {
let tcx = cx.tcx;
match mono_item {
MonoItem::Fn(inst) => {
let _inst_guard =
crate::PrintOnPanic(|| format!("{:?} {}", inst, tcx.symbol_name(inst).name));
debug_assert!(!inst.substs.needs_infer());
tcx.sess
.time("codegen fn", || crate::base::codegen_fn(cx, inst, linkage));
}
MonoItem::Static(def_id) => {
crate::constant::codegen_static(&mut cx.constants_cx, def_id);
}
MonoItem::GlobalAsm(hir_id) => {
let item = tcx.hir().expect_item(hir_id);
if let rustc_hir::ItemKind::GlobalAsm(rustc_hir::GlobalAsm { asm }) = item.kind {
cx.global_asm.push_str(&*asm.as_str());
cx.global_asm.push_str("\n\n");
} else {
bug!("Expected GlobalAsm found {:?}", item);
}
}
}
}
fn time<R>(tcx: TyCtxt<'_>, name: &'static str, f: impl FnOnce() -> R) -> R {
if std::env::var("CG_CLIF_DISPLAY_CG_TIME")
.as_ref()
.map(|val| &**val)
== Ok("1")
{
println!("[{:<30}: {}] start", tcx.crate_name(LOCAL_CRATE), name);
let before = std::time::Instant::now();
let res = tcx.sess.time(name, f);
let after = std::time::Instant::now();
println!(
"[{:<30}: {}] end time: {:?}",
tcx.crate_name(LOCAL_CRATE),
name,
after - before
);
res
} else {
tcx.sess.time(name, f)
}
}
|
