diff options
Diffstat (limited to 'gcc/ira.c')
| -rw-r--r-- | gcc/ira.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/gcc/ira.c b/gcc/ira.c index 8ac153badb3..087ba6ab1f4 100644 --- a/gcc/ira.c +++ b/gcc/ira.c @@ -4991,25 +4991,40 @@ split_live_ranges_for_shrink_wrap (void) if (!dest || dest == pic_offset_table_rtx) continue; - rtx newreg = NULL_RTX; + bool need_newreg = false; df_ref use, next; for (use = DF_REG_USE_CHAIN (REGNO (dest)); use; use = next) { rtx_insn *uin = DF_REF_INSN (use); next = DF_REF_NEXT_REG (use); + if (DEBUG_INSN_P (uin)) + continue; + basic_block ubb = BLOCK_FOR_INSN (uin); if (ubb == call_dom || dominated_by_p (CDI_DOMINATORS, ubb, call_dom)) { - if (!newreg) - newreg = ira_create_new_reg (dest); - validate_change (uin, DF_REF_REAL_LOC (use), newreg, true); + need_newreg = true; + break; } } - if (newreg) + if (need_newreg) { + rtx newreg = ira_create_new_reg (dest); + + for (use = DF_REG_USE_CHAIN (REGNO (dest)); use; use = next) + { + rtx_insn *uin = DF_REF_INSN (use); + next = DF_REF_NEXT_REG (use); + + basic_block ubb = BLOCK_FOR_INSN (uin); + if (ubb == call_dom + || dominated_by_p (CDI_DOMINATORS, ubb, call_dom)) + validate_change (uin, DF_REF_REAL_LOC (use), newreg, true); + } + rtx_insn *new_move = gen_move_insn (newreg, dest); emit_insn_after (new_move, bb_note (call_dom)); if (dump_file) |