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#[cfg(feature = "master")]
use gccjit::{FnAttribute, VarAttribute};
use rustc_codegen_ssa::traits::PreDefineCodegenMethods;
use rustc_hir::def::DefKind;
use rustc_hir::def_id::{DefId, LOCAL_CRATE};
use rustc_middle::bug;
use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
use rustc_middle::mir::mono::{Linkage, Visibility};
use rustc_middle::ty::layout::{FnAbiOf, HasTypingEnv, LayoutOf};
use rustc_middle::ty::{self, Instance, TypeVisitableExt};
use crate::context::CodegenCx;
use crate::type_of::LayoutGccExt;
use crate::{attributes, base};
impl<'gcc, 'tcx> PreDefineCodegenMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
#[cfg_attr(not(feature = "master"), allow(unused_variables))]
fn predefine_static(
&mut 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 DefKind::Static { nested, .. } = self.tcx.def_kind(def_id) else { bug!() };
// Nested statics do not have a type, so pick a dummy type and let `codegen_static` figure out
// the gcc type from the actual evaluated initializer.
let ty =
if nested { self.tcx.types.unit } else { instance.ty(self.tcx, self.typing_env()) };
let gcc_type = self.layout_of(ty).gcc_type(self);
let is_tls = attrs.flags.contains(CodegenFnAttrFlags::THREAD_LOCAL);
let global = self.define_global(symbol_name, gcc_type, is_tls, attrs.link_section);
#[cfg(feature = "master")]
global.add_attribute(VarAttribute::Visibility(base::visibility_to_gcc(visibility)));
// TODO(antoyo): set linkage.
self.instances.borrow_mut().insert(instance, global);
}
#[cfg_attr(not(feature = "master"), allow(unused_variables))]
fn predefine_fn(
&mut self,
instance: Instance<'tcx>,
linkage: Linkage,
visibility: Visibility,
symbol_name: &str,
) {
assert!(!instance.args.has_infer());
let fn_abi = self.fn_abi_of_instance(instance, ty::List::empty());
self.linkage.set(base::linkage_to_gcc(linkage));
let decl = self.declare_fn(symbol_name, fn_abi);
//let attrs = self.tcx.codegen_instance_attrs(instance.def);
attributes::from_fn_attrs(self, decl, instance);
// If we're compiling the compiler-builtins crate, e.g., the equivalent of
// compiler-rt, then we want to implicitly compile everything with hidden
// visibility as we're going to link this object all over the place but
// don't want the symbols to get exported.
if linkage != Linkage::Internal && self.tcx.is_compiler_builtins(LOCAL_CRATE) {
#[cfg(feature = "master")]
decl.add_attribute(FnAttribute::Visibility(gccjit::Visibility::Hidden));
} else if visibility != Visibility::Default {
#[cfg(feature = "master")]
decl.add_attribute(FnAttribute::Visibility(base::visibility_to_gcc(visibility)));
}
// TODO(antoyo): call set_link_section() to allow initializing argc/argv.
// TODO(antoyo): set unique comdat.
// TODO(antoyo): use inline attribute from there in linkage.set() above.
self.functions.borrow_mut().insert(symbol_name.to_string(), decl);
self.function_instances.borrow_mut().insert(instance, decl);
}
}
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