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Fix reachable_set for non-function items in non-library crates #88032

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merged 1 commit into from Aug 16, 2021
Merged

Fix reachable_set for non-function items in non-library crates #88032

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31 changes: 16 additions & 15 deletions compiler/rustc_passes/src/reachable.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -211,21 +211,22 @@ impl<'tcx> ReachableContext<'tcx> {
if !self.any_library {
// If we are building an executable, only explicitly extern
// types need to be exported.
if let Node::Item(hir::Item { kind: hir::ItemKind::Fn(sig, ..), def_id, .. })
| Node::ImplItem(hir::ImplItem {
kind: hir::ImplItemKind::Fn(sig, ..),
def_id,
..
}) = *node
{
let reachable = sig.header.abi != Abi::Rust;
let codegen_attrs = self.tcx.codegen_fn_attrs(*def_id);
let is_extern = codegen_attrs.contains_extern_indicator();
let std_internal =
codegen_attrs.flags.contains(CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL);
if reachable || is_extern || std_internal {
self.reachable_symbols.insert(search_item);
}
let reachable =
if let Node::Item(hir::Item { kind: hir::ItemKind::Fn(sig, ..), .. })
| Node::ImplItem(hir::ImplItem {
kind: hir::ImplItemKind::Fn(sig, ..), ..
}) = *node
{
sig.header.abi != Abi::Rust
} else {
false
};
let codegen_attrs = self.tcx.codegen_fn_attrs(search_item);
let is_extern = codegen_attrs.contains_extern_indicator();
let std_internal =
codegen_attrs.flags.contains(CodegenFnAttrFlags::RUSTC_STD_INTERNAL_SYMBOL);
if reachable || is_extern || std_internal {
self.reachable_symbols.insert(search_item);
}
} else {
// If we are building a library, then reachable symbols will
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5 changes: 3 additions & 2 deletions src/test/codegen/external-no-mangle-statics.rs
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Original file line number Diff line number Diff line change
@@ -1,10 +1,11 @@
// revisions: lib staticlib
// ignore-emscripten default visibility is hidden
// compile-flags: -O
// `#[no_mangle]`d static variables always have external linkage, i.e., no `internal` in their
// definitions

#![crate_type = "lib"]
#![no_std]
#![cfg_attr(lib, crate_type = "lib")]
#![cfg_attr(staticlib, crate_type = "staticlib")]

// CHECK: @A = local_unnamed_addr constant
#[no_mangle]
Expand Down