diff options
Diffstat (limited to 'gcc/lra-lives.c')
| -rw-r--r-- | gcc/lra-lives.c | 21 |
1 files changed, 13 insertions, 8 deletions
diff --git a/gcc/lra-lives.c b/gcc/lra-lives.c index fd9e29cce66..a6846dfc9a4 100644 --- a/gcc/lra-lives.c +++ b/gcc/lra-lives.c @@ -777,28 +777,33 @@ process_bb_lives (basic_block bb, int &curr_point, bool dead_insn_p) lra_hard_reg_usage[reg->regno] += freq; call_p = CALL_P (curr_insn); + src_regno = (set != NULL_RTX && REG_P (SET_SRC (set)) + ? REGNO (SET_SRC (set)) : -1); + dst_regno = (set != NULL_RTX && REG_P (SET_DEST (set)) + ? REGNO (SET_DEST (set)) : -1); if (complete_info_p - && set != NULL_RTX - && REG_P (SET_DEST (set)) && REG_P (SET_SRC (set)) + && src_regno >= 0 && dst_regno >= 0 /* Check that source regno does not conflict with destination regno to exclude most impossible preferences. */ - && ((((src_regno = REGNO (SET_SRC (set))) >= FIRST_PSEUDO_REGISTER - && ! sparseset_bit_p (pseudos_live, src_regno)) + && (((src_regno >= FIRST_PSEUDO_REGISTER + && (! sparseset_bit_p (pseudos_live, src_regno) + || (dst_regno >= FIRST_PSEUDO_REGISTER + && lra_reg_val_equal_p (src_regno, + lra_reg_info[dst_regno].val, + lra_reg_info[dst_regno].offset)))) || (src_regno < FIRST_PSEUDO_REGISTER && ! TEST_HARD_REG_BIT (hard_regs_live, src_regno))) /* It might be 'inheritance pseudo <- reload pseudo'. */ || (src_regno >= lra_constraint_new_regno_start - && ((int) REGNO (SET_DEST (set)) - >= lra_constraint_new_regno_start) + && dst_regno >= lra_constraint_new_regno_start /* Remember to skip special cases where src/dest regnos are the same, e.g. insn SET pattern has matching constraints like =r,0. */ - && src_regno != (int) REGNO (SET_DEST (set))))) + && src_regno != dst_regno))) { int hard_regno = -1, regno = -1; - dst_regno = REGNO (SET_DEST (set)); if (dst_regno >= lra_constraint_new_regno_start && src_regno >= lra_constraint_new_regno_start) { |