Do constant folding for unary operations.
Perform constant folding for NOT and EXT{8,16,32}{S,U} operations.
Signed-off-by: Kirill Batuzov <batuzovk@ispras.ru>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/tcg/optimize.c b/tcg/optimize.c
index a1bb287..a324e98 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -107,6 +107,11 @@
case INDEX_op_sar_i32:
case INDEX_op_rotl_i32:
case INDEX_op_rotr_i32:
+ case INDEX_op_not_i32:
+ case INDEX_op_ext8s_i32:
+ case INDEX_op_ext16s_i32:
+ case INDEX_op_ext8u_i32:
+ case INDEX_op_ext16u_i32:
return 32;
#if TCG_TARGET_REG_BITS == 64
case INDEX_op_mov_i64:
@@ -121,6 +126,13 @@
case INDEX_op_sar_i64:
case INDEX_op_rotl_i64:
case INDEX_op_rotr_i64:
+ case INDEX_op_not_i64:
+ case INDEX_op_ext8s_i64:
+ case INDEX_op_ext16s_i64:
+ case INDEX_op_ext32s_i64:
+ case INDEX_op_ext8u_i64:
+ case INDEX_op_ext16u_i64:
+ case INDEX_op_ext32u_i64:
return 64;
#endif
default:
@@ -267,6 +279,29 @@
return x;
#endif
+ CASE_OP_32_64(not):
+ return ~x;
+
+ CASE_OP_32_64(ext8s):
+ return (int8_t)x;
+
+ CASE_OP_32_64(ext16s):
+ return (int16_t)x;
+
+ CASE_OP_32_64(ext8u):
+ return (uint8_t)x;
+
+ CASE_OP_32_64(ext16u):
+ return (uint16_t)x;
+
+#if TCG_TARGET_REG_BITS == 64
+ case INDEX_op_ext32s_i64:
+ return (int32_t)x;
+
+ case INDEX_op_ext32u_i64:
+ return (uint32_t)x;
+#endif
+
default:
fprintf(stderr,
"Unrecognized operation %d in do_constant_folding.\n", op);
@@ -424,6 +459,30 @@
gen_args += 2;
args += 2;
break;
+ CASE_OP_32_64(not):
+ CASE_OP_32_64(ext8s):
+ CASE_OP_32_64(ext16s):
+ CASE_OP_32_64(ext8u):
+ CASE_OP_32_64(ext16u):
+#if TCG_TARGET_REG_BITS == 64
+ case INDEX_op_ext32s_i64:
+ case INDEX_op_ext32u_i64:
+#endif
+ if (temps[args[1]].state == TCG_TEMP_CONST) {
+ gen_opc_buf[op_index] = op_to_movi(op);
+ tmp = do_constant_folding(op, temps[args[1]].val, 0);
+ tcg_opt_gen_movi(gen_args, args[0], tmp, nb_temps, nb_globals);
+ gen_args += 2;
+ args += 2;
+ break;
+ } else {
+ reset_temp(args[0], nb_temps, nb_globals);
+ gen_args[0] = args[0];
+ gen_args[1] = args[1];
+ gen_args += 2;
+ args += 2;
+ break;
+ }
CASE_OP_32_64(add):
CASE_OP_32_64(sub):
CASE_OP_32_64(mul):
