diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 181a33e..800e65e 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -560,10 +560,25 @@ combine_validate_cost (rtx i1, rtx i2, rtx i3, rtx newpat, rtx newi2pat) new_i2_cost = 0; } + if (undobuf.other_insn) + { + int old_other_cost, new_other_cost; + + old_other_cost = (INSN_UID (undobuf.other_insn) <= last_insn_cost + ? uid_insn_cost[INSN_UID (undobuf.other_insn)] : 0); + new_other_cost = insn_rtx_cost (PATTERN (undobuf.other_insn)); + if (old_other_cost > 0 && new_other_cost > 0) + { + old_cost += old_other_cost; + new_cost += new_other_cost; + } + else + old_cost = 0; + } + /* Disallow this recombination if both new_cost and old_cost are greater than zero, and new_cost is greater than old cost. */ - if (!undobuf.other_insn - && old_cost > 0 + if (old_cost > 0 && new_cost > old_cost) { if (dump_file) |