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