@@ -3606,7 +3606,8 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
/* satisfy input constraints */
for (k = 0; k < nb_iargs; k++) {
- TCGRegSet i_preferred_regs, o_preferred_regs;
+ TCGRegSet i_preferred_regs;
+ bool allocate_new_reg;
i = def->args_ct[nb_oargs + k].sort_index;
arg = op->args[i];
@@ -3621,9 +3622,12 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
continue;
}
- i_preferred_regs = o_preferred_regs = 0;
+ reg = ts->reg;
+ i_preferred_regs = 0;
+ allocate_new_reg = false;
+
if (arg_ct->ialias) {
- o_preferred_regs = op->output_pref[arg_ct->alias_index];
+ i_preferred_regs = op->output_pref[arg_ct->alias_index];
/*
* If the input is readonly, then it cannot also be an
@@ -3632,30 +3636,23 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
* register and move it.
*/
if (temp_readonly(ts) || !IS_DEAD_ARG(i)) {
- goto allocate_in_reg;
+ allocate_new_reg = true;
+ } else if (ts->val_type == TEMP_VAL_REG) {
+ /*
+ * Check if the current register has already been
+ * allocated for another input.
+ */
+ allocate_new_reg = tcg_regset_test_reg(i_allocated_regs, reg);
}
-
- /*
- * Check if the current register has already been allocated
- * for another input aliased to an output.
- */
- if (ts->val_type == TEMP_VAL_REG) {
- reg = ts->reg;
- for (int k2 = 0; k2 < k; k2++) {
- int i2 = def->args_ct[nb_oargs + k2].sort_index;
- if (def->args_ct[i2].ialias && reg == new_args[i2]) {
- goto allocate_in_reg;
- }
- }
- }
- i_preferred_regs = o_preferred_regs;
}
- temp_load(s, ts, arg_ct->regs, i_allocated_regs, i_preferred_regs);
- reg = ts->reg;
+ if (!allocate_new_reg) {
+ temp_load(s, ts, arg_ct->regs, i_allocated_regs, i_preferred_regs);
+ reg = ts->reg;
+ allocate_new_reg = !tcg_regset_test_reg(arg_ct->regs, reg);
+ }
- if (!tcg_regset_test_reg(arg_ct->regs, reg)) {
- allocate_in_reg:
+ if (allocate_new_reg) {
/*
* Allocate a new register matching the constraint
* and move the temporary register into it.
@@ -3663,7 +3660,7 @@ static void tcg_reg_alloc_op(TCGContext *s, const TCGOp *op)
temp_load(s, ts, tcg_target_available_regs[ts->type],
i_allocated_regs, 0);
reg = tcg_reg_alloc(s, arg_ct->regs, i_allocated_regs,
- o_preferred_regs, ts->indirect_base);
+ i_preferred_regs, ts->indirect_base);
if (!tcg_out_mov(s, ts->type, reg, ts->reg)) {
/*
* Cross register class move not supported. Sync the
Replace goto allocate_in_reg with a boolean. Remove o_preferred_regs which isn't used, except to copy. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- tcg/tcg.c | 45 +++++++++++++++++++++------------------------ 1 file changed, 21 insertions(+), 24 deletions(-)