diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/base.rs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_ssa/src/base.rs b/compiler/rustc_codegen_ssa/src/base.rs index 229e3d9dc5f..4e13d4dbcb7 100644 --- a/compiler/rustc_codegen_ssa/src/base.rs +++ b/compiler/rustc_codegen_ssa/src/base.rs @@ -273,6 +273,14 @@ pub fn cast_to_dyn_star<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( matches!(dst_ty.kind(), ty::Dynamic(_, _, ty::DynStar)), "destination type must be a dyn*" ); + // FIXME(dyn-star): We can remove this when all supported LLVMs use opaque ptrs only. + let unit_ptr = bx.cx().type_ptr_to(bx.cx().type_struct(&[], false)); + let src = match bx.cx().type_kind(bx.cx().backend_type(src_ty_and_layout)) { + TypeKind::Pointer => bx.pointercast(src, unit_ptr), + TypeKind::Integer => bx.inttoptr(src, unit_ptr), + // FIXME(dyn-star): We probably have to do a bitcast first, then inttoptr. + kind => bug!("unexpected TypeKind for left-hand side of `dyn*` cast: {kind:?}"), + }; (src, unsized_info(bx, src_ty_and_layout.ty, dst_ty, old_info)) } |