diff options
| -rw-r--r-- | tcg/optimize.c | 43 |
1 files changed, 32 insertions, 11 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index cd0e793..413920f 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -50,6 +50,7 @@ struct tcg_temp_info { }; static struct tcg_temp_info temps[TCG_MAX_TEMPS]; +static TCGTempSet temps_used; /* Reset TEMP's state to TCG_TEMP_UNDEF. If TEMP only had one copy, remove the copy flag from the left temp. */ @@ -67,6 +68,22 @@ static void reset_temp(TCGArg temp) temps[temp].mask = -1; } +/* Reset all temporaries, given that there are NB_TEMPS of them. */ +static void reset_all_temps(int nb_temps) +{ + bitmap_zero(temps_used.l, nb_temps); +} + +/* Initialize and activate a temporary. */ +static void init_temp_info(TCGArg temp) +{ + if (!test_bit(temp, temps_used.l)) { + temps[temp].state = TCG_TEMP_UNDEF; + temps[temp].mask = -1; + set_bit(temp, temps_used.l); + } +} + static TCGOp *insert_op_before(TCGContext *s, TCGOp *old_op, TCGOpcode opc, int nargs) { @@ -98,16 +115,6 @@ static TCGOp *insert_op_before(TCGContext *s, TCGOp *old_op, return new_op; } -/* Reset all temporaries, given that there are NB_TEMPS of them. */ -static void reset_all_temps(int nb_temps) -{ - int i; - for (i = 0; i < nb_temps; i++) { - temps[i].state = TCG_TEMP_UNDEF; - temps[i].mask = -1; - } -} - static int op_bits(TCGOpcode op) { const TCGOpDef *def = &tcg_op_defs[op]; @@ -598,12 +605,24 @@ void tcg_optimize(TCGContext *s) const TCGOpDef *def = &tcg_op_defs[opc]; oi_next = op->next; + + /* Count the arguments, and initialize the temps that are + going to be used */ if (opc == INDEX_op_call) { nb_oargs = op->callo; nb_iargs = op->calli; + for (i = 0; i < nb_oargs + nb_iargs; i++) { + tmp = args[i]; + if (tmp != TCG_CALL_DUMMY_ARG) { + init_temp_info(tmp); + } + } } else { nb_oargs = def->nb_oargs; nb_iargs = def->nb_iargs; + for (i = 0; i < nb_oargs + nb_iargs; i++) { + init_temp_info(args[i]); + } } /* Do copy propagation */ @@ -1299,7 +1318,9 @@ void tcg_optimize(TCGContext *s) if (!(args[nb_oargs + nb_iargs + 1] & (TCG_CALL_NO_READ_GLOBALS | TCG_CALL_NO_WRITE_GLOBALS))) { for (i = 0; i < nb_globals; i++) { - reset_temp(i); + if (test_bit(i, temps_used.l)) { + reset_temp(i); + } } } goto do_reset_output; |
