The fix for 80178 was broken, because I forgot that copy_fn_p is false for move constructors. As a result, the calling convention for a class with a trivial move constructor and deleted copy constructor changed inappropriately.
Tested x86_64-pc-linux-gnu, applying to trunk and 8.
commit d6cc7705f626778cb7e19fccf90117e7ed47d794 Author: Jason Merrill <ja...@redhat.com> Date: Mon Jun 11 12:14:27 2018 -0400 PR c++/86094 - wrong code with defaulted move ctor. * tree.c (type_has_nontrivial_copy_init): Fix move ctor handling. diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c index bbbda7e98b6..156d1e469c6 100644 --- a/gcc/cp/tree.c +++ b/gcc/cp/tree.c @@ -4135,7 +4135,7 @@ type_has_nontrivial_copy_init (const_tree type) for (ovl_iterator iter (CLASSTYPE_CONSTRUCTORS (t)); iter; ++iter) { tree fn = *iter; - if (copy_fn_p (fn)) + if (copy_fn_p (fn) || move_fn_p (fn)) { saw_copy = true; if (!DECL_DELETED_FN (fn)) diff --git a/gcc/testsuite/g++.dg/abi/invisiref2.C b/gcc/testsuite/g++.dg/abi/invisiref2.C new file mode 100644 index 00000000000..592d212ab11 --- /dev/null +++ b/gcc/testsuite/g++.dg/abi/invisiref2.C @@ -0,0 +1,14 @@ +// PR c++/86094 +// { dg-do compile { target c++11 } } +// { dg-additional-options "-Wabi=11 -fdump-tree-gimple" } +// { dg-final { scan-tree-dump-not "struct S &" "gimple" } } + +struct S { + S(S&&) = default; + int i; +}; + +S foo(S s) +{ + return s; +}