diff options
| -rw-r--r-- | tcg/tcg.c | 67 |
1 files changed, 31 insertions, 36 deletions
@@ -1564,6 +1564,24 @@ static int tcg_reg_alloc(TCGContext *s, TCGRegSet reg1, TCGRegSet reg2) tcg_abort(); } +/* mark a temporary as dead. */ +static inline void temp_dead(TCGContext *s, int temp) +{ + TCGTemp *ts; + + ts = &s->temps[temp]; + if (!ts->fixed_reg) { + if (ts->val_type == TEMP_VAL_REG) { + s->reg_to_temp[ts->reg] = -1; + } + if (temp < s->nb_globals || (ts->temp_local && ts->mem_allocated)) { + ts->val_type = TEMP_VAL_MEM; + } else { + ts->val_type = TEMP_VAL_DEAD; + } + } +} + /* save a temporary to memory. 'allocated_regs' is used in case a temporary registers needs to be allocated to store a constant. */ static void temp_save(TCGContext *s, int temp, TCGRegSet allocated_regs) @@ -1621,10 +1639,7 @@ static void tcg_reg_alloc_bb_end(TCGContext *s, TCGRegSet allocated_regs) if (ts->temp_local) { temp_save(s, i, allocated_regs); } else { - if (ts->val_type == TEMP_VAL_REG) { - s->reg_to_temp[ts->reg] = -1; - } - ts->val_type = TEMP_VAL_DEAD; + temp_dead(s, i); } } @@ -1673,8 +1688,7 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def, if (ots->val_type == TEMP_VAL_REG) s->reg_to_temp[ots->reg] = -1; reg = ts->reg; - s->reg_to_temp[reg] = -1; - ts->val_type = TEMP_VAL_DEAD; + temp_dead(s, args[1]); } else { if (ots->val_type == TEMP_VAL_REG) { reg = ots->reg; @@ -1801,14 +1815,8 @@ static void tcg_reg_alloc_op(TCGContext *s, } else { /* mark dead temporaries and free the associated registers */ for(i = nb_oargs; i < nb_oargs + nb_iargs; i++) { - arg = args[i]; if (IS_DEAD_ARG(i)) { - ts = &s->temps[arg]; - if (!ts->fixed_reg) { - if (ts->val_type == TEMP_VAL_REG) - s->reg_to_temp[ts->reg] = -1; - ts->val_type = TEMP_VAL_DEAD; - } + temp_dead(s, args[i]); } } @@ -1848,11 +1856,12 @@ static void tcg_reg_alloc_op(TCGContext *s, tcg_regset_set_reg(allocated_regs, reg); /* if a fixed register is used, then a move will be done afterwards */ if (!ts->fixed_reg) { - if (ts->val_type == TEMP_VAL_REG) - s->reg_to_temp[ts->reg] = -1; if (IS_DEAD_ARG(i)) { - ts->val_type = TEMP_VAL_DEAD; + temp_dead(s, args[i]); } else { + if (ts->val_type == TEMP_VAL_REG) { + s->reg_to_temp[ts->reg] = -1; + } ts->val_type = TEMP_VAL_REG; ts->reg = reg; /* temp value is modified, so the value kept in memory is @@ -2011,14 +2020,8 @@ static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def, /* mark dead temporaries and free the associated registers */ for(i = nb_oargs; i < nb_iargs + nb_oargs; i++) { - arg = args[i]; if (IS_DEAD_ARG(i)) { - ts = &s->temps[arg]; - if (!ts->fixed_reg) { - if (ts->val_type == TEMP_VAL_REG) - s->reg_to_temp[ts->reg] = -1; - ts->val_type = TEMP_VAL_DEAD; - } + temp_dead(s, args[i]); } } @@ -2048,11 +2051,12 @@ static int tcg_reg_alloc_call(TCGContext *s, const TCGOpDef *def, tcg_out_mov(s, ts->type, ts->reg, reg); } } else { - if (ts->val_type == TEMP_VAL_REG) - s->reg_to_temp[ts->reg] = -1; if (IS_DEAD_ARG(i)) { - ts->val_type = TEMP_VAL_DEAD; + temp_dead(s, args[i]); } else { + if (ts->val_type == TEMP_VAL_REG) { + s->reg_to_temp[ts->reg] = -1; + } ts->val_type = TEMP_VAL_REG; ts->reg = reg; ts->mem_coherent = 0; @@ -2167,16 +2171,7 @@ static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, args += args[0]; goto next; case INDEX_op_discard: - { - TCGTemp *ts; - ts = &s->temps[args[0]]; - /* mark the temporary as dead */ - if (!ts->fixed_reg) { - if (ts->val_type == TEMP_VAL_REG) - s->reg_to_temp[ts->reg] = -1; - ts->val_type = TEMP_VAL_DEAD; - } - } + temp_dead(s, args[0]); break; case INDEX_op_set_label: tcg_reg_alloc_bb_end(s, s->reserved_regs); |