todo

Author: ZuseZ4

compiler/rustc_codegen_ssa/src/mir/block.rs

@@ -918,6 +918,39 @@ impl<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                     generic_args,
                     fn_span,
                 );
+                if Some(instance.def_id()) == bx.tcx().lang_items().preload_fn() {
+                    let target = target.unwrap();
+
+                    // 1. Codegen MIR args into OperandRefs.
+                    // 2. Emit __tgt_target_data_begin_mapper.
+                    // 3. Store Preload { cpu_ptr: arg_ptr, _marker: PhantomData } into destination.
+                    // 4. Branch to target.
+                    return self.codegen_offload_preload_call(
+                        helper,
+                        bx,
+                        args,
+                        destination,
+                        target,
+                        fn_span,
+                        mergeable_succ,
+                        /* mutable */ false,
+                    );
+                }
+
+                if Some(instance.def_id()) == bx.tcx().lang_items().preload_mut_fn() {
+                    let target = target.unwrap();
+
+                    return self.codegen_offload_preload_call(
+                        helper,
+                        bx,
+                        args,
+                        destination,
+                        target,
+                        fn_span,
+                        mergeable_succ,
+                        /* mutable */ true,
+                    );
+                }
 
                 match instance.def {
                     // We don't need AsyncDropGlueCtorShim here because it is not `noop func`,