@@ -376,8 +376,15 @@ static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
op = gen_opc_buf[op_index];
def = &tcg_op_defs[op];
/* Do copy propagation */
- if (!(def->flags & (TCG_OPF_CALL_CLOBBER | TCG_OPF_SIDE_EFFECTS))) {
- assert(op != INDEX_op_call);
+ if (op == INDEX_op_call) {
+ int nb_oargs = args[0] >> 16;
+ int nb_iargs = args[0] & 0xffff;
+ for (i = nb_oargs + 1; i < nb_oargs + nb_iargs + 1; i++) {
+ if (temps[args[i]].state == TCG_TEMP_COPY) {
+ args[i] = find_better_copy(s, args[i]);
+ }
+ }
+ } else {
for (i = def->nb_oargs; i < def->nb_oargs + def->nb_iargs; i++) {
if (temps[args[i]].state == TCG_TEMP_COPY) {
args[i] = find_better_copy(s, args[i]);
It is possible to do copy propagation for all operations, even the ones that have side effects or clobber arguments (it only concerns input arguments). That said, the call operation should be handled differently due to the variable number of arguments. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> --- tcg/optimize.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)