diff options
| -rw-r--r-- | gcc/regclass.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/gcc/regclass.c b/gcc/regclass.c index 129fbaf..5e75854 100644 --- a/gcc/regclass.c +++ b/gcc/regclass.c @@ -1364,6 +1364,7 @@ record_reg_classes (n_alts, n_ops, ops, modes, constraints, insn) int regno = REGNO (ops[!i]); enum machine_mode mode = GET_MODE (ops[!i]); int class; + int nr; if (regno >= FIRST_PSEUDO_REGISTER && prefclass != 0 && (reg_class_size[prefclass[regno]] @@ -1373,7 +1374,21 @@ record_reg_classes (n_alts, n_ops, ops, modes, constraints, insn) for (class = 0; class < N_REG_CLASSES; class++) if (TEST_HARD_REG_BIT (reg_class_contents[class], regno) && reg_class_size[class] == CLASS_MAX_NREGS (class, mode)) - op_costs[i].cost[class] = -1; + { + if (reg_class_size[class] == 1) + op_costs[i].cost[class] = -1; + else + { + for (nr = 0; nr < HARD_REGNO_NREGS(regno, mode); nr++) + { + if (!TEST_HARD_REG_BIT (reg_class_contents[class], regno + nr)) + break; + } + + if (nr == HARD_REGNO_NREGS(regno,mode)) + op_costs[i].cost[class] = -1; + } + } } } |