diff options
Diffstat (limited to 'gcc/config/rs6000/rs6000.c')
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 711278c7422..b4ff18d414c 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -24008,21 +24008,30 @@ rs6000_split_multireg_move (rtx dst, rtx src) static bool save_reg_p (int reg) { - /* We need to mark the PIC offset register live for the same conditions - as it is set up, or otherwise it won't be saved before we clobber it. */ - if (reg == RS6000_PIC_OFFSET_TABLE_REGNUM && !TARGET_SINGLE_PIC_BASE) { /* When calling eh_return, we must return true for all the cases where conditional_register_usage marks the PIC offset reg - call used. */ + call used or fixed. */ + if (crtl->calls_eh_return + && ((DEFAULT_ABI == ABI_V4 && flag_pic) + || (DEFAULT_ABI == ABI_DARWIN && flag_pic) + || (TARGET_TOC && TARGET_MINIMAL_TOC))) + return true; + + /* We need to mark the PIC offset register live for the same + conditions as it is set up in rs6000_emit_prologue, or + otherwise it won't be saved before we clobber it. */ if (TARGET_TOC && TARGET_MINIMAL_TOC - && (crtl->calls_eh_return - || df_regs_ever_live_p (reg) - || !constant_pool_empty_p ())) + && !constant_pool_empty_p ()) + return true; + + if (DEFAULT_ABI == ABI_V4 + && (flag_pic == 1 || (flag_pic && TARGET_SECURE_PLT)) + && df_regs_ever_live_p (RS6000_PIC_OFFSET_TABLE_REGNUM)) return true; - if ((DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_DARWIN) + if (DEFAULT_ABI == ABI_DARWIN && flag_pic && crtl->uses_pic_offset_table) return true; } |