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rustc_codegen_llvm: use opaque LLVM structs for extern type. #58271

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rustc_codegen_llvm: use opaque LLVM structs for extern type. #58271

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15 changes: 11 additions & 4 deletions src/librustc_codegen_llvm/type_of.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -90,10 +90,10 @@ fn uncached_llvm_type<'a, 'tcx>(cx: &CodegenCx<'a, 'tcx>,
match name {
None => {
let (llfields, packed) = struct_llfields(cx, layout);
cx.type_struct( &llfields, packed)
cx.type_struct(&llfields, packed)
}
Some(ref name) => {
let llty = cx.type_named_struct( name);
let llty = cx.type_named_struct(name);
*defer = Some((llty, layout));
llty
}
Expand Down Expand Up @@ -298,8 +298,15 @@ impl<'tcx> LayoutLlvmExt<'tcx> for TyLayout<'tcx> {
cx.lltypes.borrow_mut().insert((self.ty, variant_index), llty);

if let Some((llty, layout)) = defer {
let (llfields, packed) = struct_llfields(cx, layout);
cx.set_struct_body(llty, &llfields, packed)
match layout.ty.sty {
// Leave an `extern type` fully opaque (LLVM "unsized").
ty::Foreign(..) => {}

_ => {
let (llfields, packed) = struct_llfields(cx, layout);
cx.set_struct_body(llty, &llfields, packed)
}
}
}

llty
Expand Down