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use rustc::hir;
use rustc::hir::def::Def;
use rustc::mir::mono::{Linkage, Visibility};
use rustc::ty::layout::HasTyCtxt;
use std::fmt;
use crate::base;
use crate::traits::*;
pub use rustc::mir::mono::MonoItem;
pub use rustc_mir::monomorphize::item::MonoItemExt as BaseMonoItemExt;
pub trait MonoItemExt<'a, 'tcx: 'a>: fmt::Debug + BaseMonoItemExt<'a, 'tcx> {
fn define<Bx: BuilderMethods<'a, 'tcx>>(&self, cx: &'a Bx::CodegenCx) {
debug!("BEGIN IMPLEMENTING '{} ({})' in cgu {}",
self.to_string(cx.tcx(), true),
self.to_raw_string(),
cx.codegen_unit().name());
match *self.as_mono_item() {
MonoItem::Static(def_id) => {
let tcx = cx.tcx();
let is_mutable = match tcx.describe_def(def_id) {
Some(Def::Static(_, is_mutable)) => is_mutable,
Some(other) => {
bug!("Expected Def::Static, found {:?}", other)
}
None => {
bug!("Expected Def::Static for {:?}, found nothing", def_id)
}
};
cx.codegen_static(def_id, is_mutable);
}
MonoItem::GlobalAsm(node_id) => {
let item = cx.tcx().hir().expect_item(node_id);
if let hir::ItemKind::GlobalAsm(ref ga) = item.node {
cx.codegen_global_asm(ga);
} else {
span_bug!(item.span, "Mismatch between hir::Item type and MonoItem type")
}
}
MonoItem::Fn(instance) => {
base::codegen_instance::<Bx>(&cx, instance);
}
}
debug!("END IMPLEMENTING '{} ({})' in cgu {}",
self.to_string(cx.tcx(), true),
self.to_raw_string(),
cx.codegen_unit().name());
}
fn predefine<Bx: BuilderMethods<'a, 'tcx>>(
&self,
cx: &'a Bx::CodegenCx,
linkage: Linkage,
visibility: Visibility
) {
debug!("BEGIN PREDEFINING '{} ({})' in cgu {}",
self.to_string(cx.tcx(), true),
self.to_raw_string(),
cx.codegen_unit().name());
let symbol_name = self.symbol_name(cx.tcx()).as_str();
debug!("symbol {}", &symbol_name);
match *self.as_mono_item() {
MonoItem::Static(def_id) => {
cx.predefine_static(def_id, linkage, visibility, &symbol_name);
}
MonoItem::Fn(instance) => {
cx.predefine_fn(instance, linkage, visibility, &symbol_name);
}
MonoItem::GlobalAsm(..) => {}
}
debug!("END PREDEFINING '{} ({})' in cgu {}",
self.to_string(cx.tcx(), true),
self.to_raw_string(),
cx.codegen_unit().name());
}
fn to_raw_string(&self) -> String {
match *self.as_mono_item() {
MonoItem::Fn(instance) => {
format!("Fn({:?}, {})",
instance.def,
instance.substs.as_ptr() as usize)
}
MonoItem::Static(id) => {
format!("Static({:?})", id)
}
MonoItem::GlobalAsm(id) => {
format!("GlobalAsm({:?})", id)
}
}
}
}
impl<'a, 'tcx: 'a> MonoItemExt<'a, 'tcx> for MonoItem<'tcx> {}
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