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Clean up dag live alias code a little 

Mainly, this makes it possible to reuse the alias code.
This commit is contained in:
Bill Currie 2019-06-16 19:17:01 +09:00
parent 82b334e919
commit 2977c145d0
1 changed files with 22 additions and 14 deletions
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36
tools/qfcc/source/dags.c
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@ -381,7 +381,8 @@ dagnode_set_edges (dag_t *dag, dagnode_t *n)
def_visit_all (op->o.def, 1,
dagnode_def_set_edges_visit, n);
}
if (op->op_type == op_temp) {
if (op->op_type == op_temp
&& (op->o.tempop.alias || op->o.tempop.alias_ops)) {
tempop_visit_all (&op->o.tempop, 1,
dagnode_tempop_set_edges_visit, n);
}
@ -488,7 +489,10 @@ dag_kill_aliases (daglabel_t *l)
operand_t *op = l->op;
if (op->op_type == op_temp) {
tempop_visit_all (&op->o.tempop, 1, dag_tempop_kill_aliases_visit, l);
if (op->o.tempop.alias || op->o.tempop.alias_ops) {
tempop_visit_all (&op->o.tempop, 1,
dag_tempop_kill_aliases_visit, l);
}
} else if (op->op_type == op_def) {
if (op->o.def->alias || op->o.def->alias_defs) {
def_visit_all (op->o.def, 1, dag_def_kill_aliases_visit, l);
@ -516,6 +520,21 @@ dag_def_live_aliases (def_t *def, void *_d)
return 0;
}
static void
dag_live_aliases(operand_t *op)
{
// FIXME it would be better to propogate the aliasing
if (op->op_type == op_temp
&& (op->o.tempop.alias || op->o.tempop.alias_ops)) {
tempop_visit_all (&op->o.tempop, 1, dag_tempop_live_aliases,
&op->o.tempop);
}
if (op->op_type == op_def
&& (op->o.def->alias || op->o.def->alias_defs)) {
def_visit_all (op->o.def, 1, dag_def_live_aliases, op->o.def);
}
}
static void
dagnode_attach_label (dagnode_t *n, daglabel_t *l)
{
@ -541,18 +560,7 @@ dagnode_attach_label (dagnode_t *n, daglabel_t *l)
set_add (n->identifiers, l->number);
dag_kill_aliases (l);
if (n->label->op) {
// FIXME it would be better to propogate the aliasing
if (n->label->op->op_type == op_temp) {
tempop_visit_all (&n->label->op->o.tempop, 1,
dag_tempop_live_aliases,
&n->label->op->o.tempop);
}
if (n->label->op->op_type == op_def
&& (n->label->op->o.def->alias
|| n->label->op->o.def->alias_defs)) {
def_visit_all (n->label->op->o.def, 1, dag_def_live_aliases,
n->label->op->o.def);
}
dag_live_aliases (n->label->op);
}
}