diff options
Diffstat (limited to 'gcc/lra-assigns.c')
| -rw-r--r-- | gcc/lra-assigns.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/lra-assigns.c b/gcc/lra-assigns.c index e19156b3280..a74d8abc3ab 100644 --- a/gcc/lra-assigns.c +++ b/gcc/lra-assigns.c @@ -910,6 +910,7 @@ spill_for (int regno, bitmap spilled_pseudo_bitmap, bool first_p) enum reg_class rclass; unsigned int spill_regno, reload_regno, uid; int insn_pseudos_num, best_insn_pseudos_num; + int bad_spills_num, smallest_bad_spills_num; lra_live_range_t r; bitmap_iterator bi; @@ -928,6 +929,7 @@ spill_for (int regno, bitmap spilled_pseudo_bitmap, bool first_p) best_hard_regno = -1; best_cost = INT_MAX; best_insn_pseudos_num = INT_MAX; + smallest_bad_spills_num = INT_MAX; rclass_size = ira_class_hard_regs_num[rclass]; mode = PSEUDO_REGNO_MODE (regno); /* Invalidate try_hard_reg_pseudos elements. */ @@ -958,6 +960,7 @@ spill_for (int regno, bitmap spilled_pseudo_bitmap, bool first_p) && ! bitmap_bit_p (&lra_optional_reload_pseudos, spill_regno))) goto fail; insn_pseudos_num = 0; + bad_spills_num = 0; if (lra_dump_file != NULL) fprintf (lra_dump_file, " Trying %d:", hard_regno); sparseset_clear (live_range_reload_inheritance_pseudos); @@ -965,6 +968,8 @@ spill_for (int regno, bitmap spilled_pseudo_bitmap, bool first_p) { if (bitmap_bit_p (&insn_conflict_pseudos, spill_regno)) insn_pseudos_num++; + if (spill_regno >= (unsigned int) lra_bad_spill_regno_start) + bad_spills_num++; for (r = lra_reg_info[spill_regno].live_ranges; r != NULL; r = r->next) @@ -1035,7 +1040,9 @@ spill_for (int regno, bitmap spilled_pseudo_bitmap, bool first_p) } if (best_insn_pseudos_num > insn_pseudos_num || (best_insn_pseudos_num == insn_pseudos_num - && best_cost > cost)) + && (bad_spills_num < smallest_bad_spills_num + || (bad_spills_num == smallest_bad_spills_num + && best_cost > cost)))) { best_insn_pseudos_num = insn_pseudos_num; best_cost = cost; |