diff options
Diffstat (limited to 'tcg/optimize.c')
| -rw-r--r-- | tcg/optimize.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index 9c65474a8c..63f970d045 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -322,7 +322,7 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, break; } - /* Simplify expression if possible. */ + /* Simplify expression for "op r, a, 0 => mov r, a" cases */ switch (op) { CASE_OP_32_64(add): CASE_OP_32_64(sub): @@ -352,6 +352,12 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, continue; } break; + default: + break; + } + + /* Simplify expression for "op r, a, 0 => movi r, 0" cases */ + switch (op) { CASE_OP_32_64(mul): if ((temps[args[2]].state == TCG_TEMP_CONST && temps[args[2]].val == 0)) { @@ -362,6 +368,12 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, continue; } break; + default: + break; + } + + /* Simplify expression for "op r, a, a => mov r, a" cases */ + switch (op) { CASE_OP_32_64(or): CASE_OP_32_64(and): if (args[1] == args[2]) { |