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Factor out the live vars magic from dag_create.

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The code is messy enough as it is :P
This commit is contained in:
Bill Currie 2012-11-20 13:44:36 +09:00
parent 06a62be1d5
commit 1472fec7f2
1 changed files with 27 additions and 22 deletions
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49
tools/qfcc/source/dags.c
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@ -328,6 +328,31 @@ dag_sort_nodes (dag_t *dag)
set_delete (visited); set_delete (visited);
} }
static void
dag_set_live_vars (set_t *live_vars, dag_t *dag, dagnode_t *n)
{
if (!strncmp (n->label->opcode, "<CALL", 5)
|| !strncmp (n->label->opcode, "<RCALL", 6)) {
int start, end;
if (!strncmp (n->label->opcode, "<CALL", 5)) {
start = 0;
end = 0;
if (n->label->opcode[5] != '>')
end = n->label->opcode[5] - '0';
} else {
start = 2;
end = n->label->opcode[6] - '0';
}
while (start < end) {
set_add (live_vars, start + 1);
start++;
}
} else if (!strncmp (n->label->opcode, "<RETURN", 7)) {
set_union (live_vars, dag->flownode->global_vars);
}
}
dag_t * dag_t *
dag_create (flownode_t *flownode) dag_create (flownode_t *flownode)
{ {
@ -407,28 +432,8 @@ dag_create (flownode_t *flownode)
lx->expr = s->expr; lx->expr = s->expr;
dagnode_attach_label (n, lx); dagnode_attach_label (n, lx);
} }
if (n->type == st_func) { if (n->type == st_func)
if (!strncmp (n->label->opcode, "<CALL", 5) dag_set_live_vars (live_vars, dag, n);
|| !strncmp (n->label->opcode, "<RCALL", 6)) {
int start, end;
if (!strncmp (n->label->opcode, "<CALL", 5)) {
start = 0;
end = 0;
if (n->label->opcode[5] != '>')
end = n->label->opcode[5] - '0';
} else {
start = 2;
end = n->label->opcode[6] - '0';
}
while (start < end) {
set_add (live_vars, start + 1);
start++;
}
} else if (!strncmp (n->label->opcode, "<RETURN", 7)) {
set_union (live_vars, flownode->global_vars);
}
}
} }
nodes = malloc (dag->num_nodes * sizeof (dagnode_t *)); nodes = malloc (dag->num_nodes * sizeof (dagnode_t *));