Add an intrinsic for ptr::metadata

2024-04-21 16:11:01 -07:00
parent 7717a306b2
commit 459ce3f6bb
31 changed files with 422 additions and 52 deletions
--- a/compiler/rustc_codegen_ssa/src/mir/operand.rs
+++ b/compiler/rustc_codegen_ssa/src/mir/operand.rs
@@ -565,6 +565,11 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                for elem in place_ref.projection.iter() {
                    match elem {
                        mir::ProjectionElem::Field(ref f, _) => {
+                            debug_assert!(
+                                !o.layout.ty.is_any_ptr(),
+                                "Bad PlaceRef: destructing pointers should use cast/PtrMetadata, \
+                                 but tried to access field {f:?} of pointer {o:?}",
+                            );
                            o = o.extract_field(bx, f.index());
                        }
                        mir::ProjectionElem::Index(_)