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All weak lang items have an explicit link name and vice versa

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This commit is contained in:
bjorn3 2025-08-15 09:21:18 +00:00
parent 3507a749b3
commit 4d62bf1634
1 changed files with 6 additions and 9 deletions
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15
compiler/rustc_codegen_ssa/src/codegen_attrs.rs
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@ -6,7 +6,6 @@ use rustc_ast::{LitKind, MetaItem, MetaItemInner, attr};
use rustc_hir::attrs::{AttributeKind, InlineAttr, InstructionSetAttr, UsedBy};
use rustc_hir::def::DefKind;
use rustc_hir::def_id::{DefId, LOCAL_CRATE, LocalDefId};
use rustc_hir::weak_lang_items::WEAK_LANG_ITEMS;
use rustc_hir::{self as hir, Attribute, LangItem, find_attr, lang_items};
use rustc_middle::middle::codegen_fn_attrs::{
CodegenFnAttrFlags, CodegenFnAttrs, PatchableFunctionEntry,
@ -520,14 +519,12 @@ fn handle_lang_items(
// strippable by the linker.
//
// Additionally weak lang items have predetermined symbol names.
if let Some(lang_item) = lang_item {
if WEAK_LANG_ITEMS.contains(&lang_item) {
codegen_fn_attrs.flags |= CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL;
}
if let Some(link_name) = lang_item.link_name() {
codegen_fn_attrs.export_name = Some(link_name);
codegen_fn_attrs.link_name = Some(link_name);
}
if let Some(lang_item) = lang_item
&& let Some(link_name) = lang_item.link_name()
{
codegen_fn_attrs.flags |= CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL;
codegen_fn_attrs.export_name = Some(link_name);
codegen_fn_attrs.link_name = Some(link_name);
}
// error when using no_mangle on a lang item item