https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102107
--- Comment #15 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Segher Boessenkool <seg...@gcc.gnu.org>: https://gcc.gnu.org/g:2484f7a4b0f52e6ed04754be336f1fa6fde47f6b commit r12-3353-g2484f7a4b0f52e6ed04754be336f1fa6fde47f6b Author: Segher Boessenkool <seg...@kernel.crashing.org> Date: Thu Sep 2 16:38:24 2021 +0000 rs6000: Don't use r12 for CR save on ELFv2 (PR102107) CR is saved and/or restored on some paths where GPR12 is already live since it has a meaning in the calling convention in the ELFv2 ABI. It is not completely clear to me that we can always use r11 here, but it does seem save, there is checking code (to detect conflicts here), and it is stage 1. So here goes. 2021-09-03 Segher Boessenkool <seg...@kernel.crashing.org> PR target/102107 * config/rs6000/rs6000-logue.c (rs6000_emit_prologue): On ELFv2 use r11 instead of r12 for CR save, in all cases.
