From 86e6268cff328e27ee6f90e2afc35b6f437a25cd Mon Sep 17 00:00:00 2001 From: Segher Boessenkool Date: Wed, 8 Sep 2021 13:10:30 +0000 Subject: [PATCH] rs6000: Fix ELFv2 r12 use in epilogue We cannot use r12 here, it is already in use as the GEP (for sibling calls). 2021-09-08 Segher Boessenkool PR target/102107 * config/rs6000/rs6000-logue.c (rs6000_emit_epilogue): For ELFv2 use r11 instead of r12 for restoring CR. --- gcc/config/rs6000/rs6000-logue.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/gcc/config/rs6000/rs6000-logue.c b/gcc/config/rs6000/rs6000-logue.c index e363d56..9965a8a 100644 --- a/gcc/config/rs6000/rs6000-logue.c +++ b/gcc/config/rs6000/rs6000-logue.c @@ -4815,6 +4815,10 @@ rs6000_emit_epilogue (enum epilogue_type epilogue_type) else if (REGNO (frame_reg_rtx) == 12) cr_save_regno = 11; + /* For ELFv2 r12 is already in use as the GEP. */ + if (DEFAULT_ABI == ABI_ELFv2) + cr_save_regno = 11; + cr_save_reg = load_cr_save (cr_save_regno, frame_reg_rtx, info->cr_save_offset + frame_off, exit_func); -- 2.7.4