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| author | Kirill Batuzov <batuzovk@ispras.ru> | 2011-07-07 16:37:15 +0400 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2011-07-30 10:51:29 +0000 |
| commit | 9a81090b12a3141ff1f1b4dc331042efbdfd2ad8 (patch) | |
| tree | b82813db625a7bf61827fd4d5066dcc8c7d52002 /tcg/optimize.c | |
| parent | 53108fb57413cf6f3d81a71a70257d49a73569c7 (diff) | |
Do constant folding for boolean operations.
Perform constant folding for AND, OR, XOR operations.
Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'tcg/optimize.c')
| -rw-r--r-- | tcg/optimize.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index 42a1bda666..c4699529f9 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -99,12 +99,18 @@ static int op_bits(int op) case INDEX_op_add_i32: case INDEX_op_sub_i32: case INDEX_op_mul_i32: + case INDEX_op_and_i32: + case INDEX_op_or_i32: + case INDEX_op_xor_i32: return 32; #if TCG_TARGET_REG_BITS == 64 case INDEX_op_mov_i64: case INDEX_op_add_i64: case INDEX_op_sub_i64: case INDEX_op_mul_i64: + case INDEX_op_and_i64: + case INDEX_op_or_i64: + case INDEX_op_xor_i64: return 64; #endif default: @@ -190,6 +196,15 @@ static TCGArg do_constant_folding_2(int op, TCGArg x, TCGArg y) CASE_OP_32_64(mul): return x * y; + CASE_OP_32_64(and): + return x & y; + + CASE_OP_32_64(or): + return x | y; + + CASE_OP_32_64(xor): + return x ^ y; + default: fprintf(stderr, "Unrecognized operation %d in do_constant_folding.\n", op); @@ -246,6 +261,9 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, switch (op) { CASE_OP_32_64(add): CASE_OP_32_64(mul): + CASE_OP_32_64(and): + CASE_OP_32_64(or): + CASE_OP_32_64(xor): if (temps[args[1]].state == TCG_TEMP_CONST) { tmp = args[1]; args[1] = args[2]; @@ -291,6 +309,22 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, continue; } break; + CASE_OP_32_64(or): + CASE_OP_32_64(and): + if (args[1] == args[2]) { + if (args[1] == args[0]) { + args += 3; + gen_opc_buf[op_index] = INDEX_op_nop; + } else { + gen_opc_buf[op_index] = op_to_mov(op); + tcg_opt_gen_mov(gen_args, args[0], args[1], nb_temps, + nb_globals); + gen_args += 2; + args += 3; + } + continue; + } + break; } /* Propagate constants through copy operations and do constant @@ -326,6 +360,9 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, CASE_OP_32_64(add): CASE_OP_32_64(sub): CASE_OP_32_64(mul): + CASE_OP_32_64(or): + CASE_OP_32_64(and): + CASE_OP_32_64(xor): if (temps[args[1]].state == TCG_TEMP_CONST && temps[args[2]].state == TCG_TEMP_CONST) { gen_opc_buf[op_index] = op_to_movi(op); |