@@ -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) {
@@ -1153,6 +1154,11 @@ 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++) {