compiler/rustc_codegen_cranelift/src/driver/mod.rs

   1 //! Drivers are responsible for calling [`codegen_fn`] or [`codegen_static`] for each mono item and
   2 //! performing any further actions like JIT executing or writing object files.
   3 //!
   4 //! [`codegen_fn`]: crate::base::codegen_fn
   5 //! [`codegen_static`]: crate::constant::codegen_static
   6
   7 use rustc_middle::mir::mono::{Linkage as RLinkage, MonoItem, Visibility};
   8
   9 use crate::prelude::*;
  10
  11 pub(crate) mod aot;
  12 #[cfg(feature = "jit")]
  13 pub(crate) mod jit;
  14
  15 fn predefine_mono_items<'tcx>(
  16     tcx: TyCtxt<'tcx>,
  17     module: &mut dyn Module,
  18     mono_items: &[(MonoItem<'tcx>, (RLinkage, Visibility))],
  19 ) {
  20     tcx.prof.generic_activity("predefine functions").run(|| {
  21         let is_compiler_builtins = tcx.is_compiler_builtins(LOCAL_CRATE);
  22         for &(mono_item, (linkage, visibility)) in mono_items {
  23             match mono_item {
  24                 MonoItem::Fn(instance) => {
  25                     let name = tcx.symbol_name(instance).name;
  26                     let _inst_guard = crate::PrintOnPanic(|| format!("{:?} {}", instance, name));
  27                     let sig =
  28                         get_function_sig(tcx, module.target_config().default_call_conv, instance);
  29                     let linkage = crate::linkage::get_clif_linkage(
  30                         mono_item,
  31                         linkage,
  32                         visibility,
  33                         is_compiler_builtins,
  34                     );
  35                     module.declare_function(name, linkage, &sig).unwrap();
  36                 }
  37                 MonoItem::Static(_) | MonoItem::GlobalAsm(_) => {}
  38             }
  39         }
  40     });
  41 }