1 use rustc_codegen_ssa::traits::PreDefineMethods;
2 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
3 use rustc_middle::mir::mono::{Linkage, Visibility};
4 use rustc_middle::ty::{self, Instance, TypeVisitable};
5 use rustc_middle::ty::layout::{FnAbiOf, LayoutOf};
6 use rustc_span::def_id::DefId;
9 use crate::context::CodegenCx;
10 use crate::type_of::LayoutGccExt;
12 impl<'gcc, 'tcx> PreDefineMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
13 fn predefine_static(&self, def_id: DefId, _linkage: Linkage, _visibility: Visibility, symbol_name: &str) {
14 let attrs = self.tcx.codegen_fn_attrs(def_id);
15 let instance = Instance::mono(self.tcx, def_id);
16 let ty = instance.ty(self.tcx, ty::ParamEnv::reveal_all());
17 let gcc_type = self.layout_of(ty).gcc_type(self, true);
19 let is_tls = attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL);
20 let global = self.define_global(symbol_name, gcc_type, is_tls, attrs.link_section);
22 // TODO(antoyo): set linkage and visibility.
23 self.instances.borrow_mut().insert(instance, global);
26 fn predefine_fn(&self, instance: Instance<'tcx>, linkage: Linkage, _visibility: Visibility, symbol_name: &str) {
27 assert!(!instance.substs.needs_infer());
29 let fn_abi = self.fn_abi_of_instance(instance, ty::List::empty());
30 self.linkage.set(base::linkage_to_gcc(linkage));
31 let _decl = self.declare_fn(symbol_name, &fn_abi);
32 //let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
34 // TODO(antoyo): call set_link_section() to allow initializing argc/argv.
35 // TODO(antoyo): set unique comdat.
36 // TODO(antoyo): use inline attribute from there in linkage.set() above.