diff options
Diffstat (limited to 'tcg/optimize.c')
| -rw-r--r-- | tcg/optimize.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c index c5cdde2160..7838be2c50 100644 --- a/tcg/optimize.c +++ b/tcg/optimize.c @@ -691,7 +691,8 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, break; } - /* Simplify using known-zero bits */ + /* Simplify using known-zero bits. Currently only ops with a single + output argument is supported. */ mask = -1; affected = -1; switch (op) { @@ -1149,6 +1150,11 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, } else { for (i = 0; i < def->nb_oargs; i++) { reset_temp(args[i]); + /* Save the corresponding known-zero bits mask for the + first output argument (only one supported so far). */ + if (i == 0) { + temps[args[i]].mask = mask; + } } } for (i = 0; i < def->nb_args; i++) { |