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use rustc_codegen_ssa::traits::PreDefineMethods;
use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
use rustc_middle::mir::mono::{Linkage, Visibility};
use rustc_middle::ty::{self, Instance, TypeFoldable};
use rustc_middle::ty::layout::FnAbiExt;
use rustc_span::def_id::DefId;
use rustc_target::abi::LayoutOf;
use rustc_target::abi::call::FnAbi;
use crate::base;
use crate::context::CodegenCx;
use crate::type_of::LayoutGccExt;
impl<'gcc, 'tcx> PreDefineMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
fn predefine_static(&self, def_id: DefId, _linkage: Linkage, _visibility: Visibility, symbol_name: &str) {
let attrs = self.tcx.codegen_fn_attrs(def_id);
let instance = Instance::mono(self.tcx, def_id);
let ty = instance.ty(self.tcx, ty::ParamEnv::reveal_all());
let gcc_type = self.layout_of(ty).gcc_type(self, true);
let is_tls = attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL);
let global = self.define_global(symbol_name, gcc_type, is_tls, attrs.link_section).unwrap_or_else(|| {
self.sess().span_fatal(
self.tcx.def_span(def_id),
&format!("symbol `{}` is already defined", symbol_name),
)
});
// TODO
/*unsafe {
llvm::LLVMRustSetLinkage(global, base::linkage_to_llvm(linkage));
llvm::LLVMRustSetVisibility(global, base::visibility_to_llvm(visibility));
}*/
self.instances.borrow_mut().insert(instance, global);
}
fn predefine_fn(&self, instance: Instance<'tcx>, linkage: Linkage, _visibility: Visibility, symbol_name: &str) {
assert!(!instance.substs.needs_infer() && !instance.substs.has_param_types_or_consts());
let fn_abi = FnAbi::of_instance(self, instance, &[]);
self.linkage.set(base::linkage_to_gcc(linkage));
let _decl = self.declare_fn(symbol_name, &fn_abi);
//let attrs = self.tcx.codegen_fn_attrs(instance.def_id());
// TODO: call set_link_section() to allow initializing argc/argv.
//base::set_link_section(decl, &attrs);
/*if linkage == Linkage::LinkOnceODR || linkage == Linkage::WeakODR {
llvm::SetUniqueComdat(self.llmod, decl);
}*/
//debug!("predefine_fn: instance = {:?}", instance);
// TODO: use inline attribute from there in linkage.set() above:
//attributes::from_fn_attrs(self, decl, instance);
//self.instances.borrow_mut().insert(instance, decl);
}
}
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