diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-06 16:47:14 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-11 18:06:03 +0200 |
| commit | fbeaa26c4cf45a83afaab7aac286d5d96199e740 (patch) | |
| tree | 90586a99718e8e49e8c66855ee25e5a0c6c928e3 /tcg/optimize.c | |
| parent | f8dd19e5c7a5ff8cb5587c9aaea96ef754429713 (diff) | |
tcg/optimize: add constant folding for brcond
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'tcg/optimize.c')
| -rw-r--r-- | tcg/optimize.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index 1cb1f36335..156e8d9698 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -603,6 +603,32 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, args += 4; break; } + CASE_OP_32_64(brcond): + if (temps[args[0]].state == TCG_TEMP_CONST + && temps[args[1]].state == TCG_TEMP_CONST) { + if (do_constant_folding_cond(op, temps[args[0]].val, + temps[args[1]].val, args[2])) { + memset(temps, 0, nb_temps * sizeof(struct tcg_temp_info)); + gen_opc_buf[op_index] = INDEX_op_br; + gen_args[0] = args[3]; + gen_args += 1; + args += 4; + } else { + gen_opc_buf[op_index] = INDEX_op_nop; + args += 4; + } + break; + } else { + memset(temps, 0, nb_temps * sizeof(struct tcg_temp_info)); + reset_temp(args[0], nb_temps, nb_globals); + gen_args[0] = args[0]; + gen_args[1] = args[1]; + gen_args[2] = args[2]; + gen_args[3] = args[3]; + gen_args += 4; + args += 4; + break; + } case INDEX_op_call: nb_call_args = (args[0] >> 16) + (args[0] & 0xffff); if (!(args[nb_call_args + 1] & (TCG_CALL_CONST | TCG_CALL_PURE))) { @@ -624,7 +650,6 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, case INDEX_op_set_label: case INDEX_op_jmp: case INDEX_op_br: - CASE_OP_32_64(brcond): memset(temps, 0, nb_temps * sizeof(struct tcg_temp_info)); for (i = 0; i < def->nb_args; i++) { *gen_args = *args; |