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Treat flow control statements separately.

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I'm not convinced this is the correct fix for while (count--), but it does
work.
This commit is contained in:
Bill Currie 2012-11-24 12:53:51 +09:00
parent bc26cd24c8
commit bdafdad0d5
1 changed files with 25 additions and 0 deletions
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25
tools/qfcc/source/dags.c
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@ -313,6 +313,13 @@ dagnode_set_edges (dagnode_t *n)
{
int i;
for (i = 0; i < 3; i++) {
dagnode_t *child = n->children[i];
if (child && n != child)
set_add (n->edges, child->number);
}
if (n->type == st_flow)
return;
for (i = 0; i < 3; i++) {
dagnode_t *child = n->children[i];
if (child) {
@ -416,6 +423,17 @@ dag_sort_nodes (dag_t *dag)
set_delete (visited);
}
static void
dag_make_var_live (set_t *live_vars, operand_t *op)
{
flowvar_t *var = 0;
if (op)
var = flow_get_var (op);
if (var)
set_add (live_vars, var->number);
}
static void
dag_set_live_vars (set_t *live_vars, dag_t *dag, dagnode_t *n)
{
@ -480,6 +498,8 @@ dag_create (flownode_t *flownode)
flush_daglabels ();
// count the number of statements so the number of nodes and labels can be
// guessed
for (s = block->statements; s; s = s->next)
num_statements++;
@ -497,8 +517,13 @@ dag_create (flownode_t *flownode)
operand_t *operands[4];
dagnode_t *n = 0, *children[3] = {0, 0, 0};
daglabel_t *op, *lx;
int i;
dag_make_children (dag, s, operands, children);
if (s->type == st_flow)
for (i = 0; i < 3; i++)
if (children[i])
dag_make_var_live (live_vars, operands[i]);
op = opcode_label (dag, s->opcode, s->expr);
n = children[0];
if (s->type != st_assign