https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97107
--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Alan Modra <amo...@gcc.gnu.org>: https://gcc.gnu.org/g:199baa71f7a6c8f255afdda03cd3b2644f8f0fcd commit r11-3416-g199baa71f7a6c8f255afdda03cd3b2644f8f0fcd Author: Alan Modra <amo...@gmail.com> Date: Fri Sep 18 23:03:11 2020 +0930 [RS6000] PR97107, libgo fails to build for power10 Calls from split-stack code to non-split-stack code need to expand mapped stack memory via __morestack. Even tail calls. __morestack is quite a surprising function on powerpc in that it calls back to its caller, and a tail call will continue running in the context of extra mapped stack. PR target/97107 * config/rs6000/rs6000-internal.h (struct rs6000_stack): Improve calls_p comment. * config/rs6000/rs6000-logue.c (rs6000_stack_info): Likewise. (rs6000_expand_split_stack_prologue): Emit the prologue for functions that make a sibling call.
