diff options
| author | Richard Henderson <rth@twiddle.net> | 2012-09-21 10:13:37 -0700 |
|---|---|---|
| committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2012-10-09 01:42:09 -0500 |
| commit | b5b6bb16b9b104c36079a471f2d793b67a0d5e9c (patch) | |
| tree | 04ce8082be5f72d7eb45973dee408fab8791d2c3 /tcg | |
| parent | 52080f688bcf00585d08d8d0a15e47bbae5fe5b4 (diff) | |
tcg: Optimize movcond for constant comparisons
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/optimize.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index 9da333c303..26038a695d 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -394,6 +394,14 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, args[3] = tcg_swap_cond(args[3]); } break; + CASE_OP_32_64(movcond): + if (temps[args[1]].state == TCG_TEMP_CONST + && temps[args[2]].state != TCG_TEMP_CONST) { + tmp = args[1]; + args[1] = args[2]; + args[2] = tmp; + args[5] = tcg_swap_cond(args[5]); + } default: break; } @@ -614,6 +622,38 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, } args += 4; break; + CASE_OP_32_64(movcond): + if (temps[args[1]].state == TCG_TEMP_CONST + && temps[args[2]].state == TCG_TEMP_CONST) { + tmp = do_constant_folding_cond(op, temps[args[1]].val, + temps[args[2]].val, args[5]); + if (args[0] == args[4-tmp] + || (temps[args[4-tmp]].state == TCG_TEMP_COPY + && temps[args[4-tmp]].val == args[0])) { + gen_opc_buf[op_index] = INDEX_op_nop; + } else if (temps[args[4-tmp]].state == TCG_TEMP_CONST) { + gen_opc_buf[op_index] = op_to_movi(op); + tcg_opt_gen_movi(gen_args, args[0], temps[args[4-tmp]].val, + nb_temps, nb_globals); + gen_args += 2; + } else { + gen_opc_buf[op_index] = op_to_mov(op); + tcg_opt_gen_mov(gen_args, args[0], args[4-tmp], + nb_temps, nb_globals); + gen_args += 2; + } + } else { + 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]; + gen_args[5] = args[5]; + gen_args += 6; + } + args += 6; + 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))) { |