https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100898
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-11 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:d9f75e8a73b1b69b8f709b56296b4a9751c50ef0 commit r11-8589-gd9f75e8a73b1b69b8f709b56296b4a9751c50ef0 Author: Jakub Jelinek <ja...@redhat.com> Date: Mon Jun 7 09:25:37 2021 +0200 tree-inline: Fix up __builtin_va_arg_pack handling [PR100898] The following testcase ICEs, because gimple_call_arg_ptr (..., 0) asserts that there is at least one argument, while we were using it even if we didn't copy anything just to get a pointer from/to which the zero arguments should be copied. Fixed by guarding the memcpy calls. Also, the code was calling gimple_call_num_args too many times - 5 times instead of 2, so the patch adds two temporaries for those. 2021-06-07 Jakub Jelinek <ja...@redhat.com> PR middle-end/100898 * tree-inline.c (copy_bb): Only use gimple_call_arg_ptr if memcpy should copy any arguments. Don't call gimple_call_num_args on id->call_stmt or call_stmt more than once. * g++.dg/ext/va-arg-pack-3.C: New test. (cherry picked from commit d66a703c8ba86f3ca04cc10c3071696e6d014de6)
