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Factor out label unuse.

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I expect to need this more often in the future.
This commit is contained in:
Bill Currie 2012-05-04 14:01:39 +09:00
parent d2da3b8246
commit f169a7732d
1 changed files with 10 additions and 6 deletions
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16
tools/qfcc/source/statements.c
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@ -1074,6 +1074,13 @@ remove_label_from_dest (ex_label_t *label)
}
}
static void
unuse_label (ex_label_t *label)
{
if (label && !--label->used)
remove_label_from_dest (label);
}
static void
dump_flow (sblock_t *sblock, const char *stage)
{
@ -1108,8 +1115,7 @@ thread_jumps (sblock_t *blocks)
l = l->dest->statements->opa->o.label) {
}
if (l != *label) {
if (!--(*label)->used)
remove_label_from_dest (*label);
unuse_label (*label);
l->used++;
*label = l;
}
@ -1142,8 +1148,7 @@ remove_dead_blocks (sblock_t *blocks)
if (is_conditional (s) && is_goto (sb->statements)
&& s->opb->o.label->dest == sb->next) {
debug (0, "meging if/goto %p %p", sblock, sb);
if (!--s->opb->o.label->used)
remove_label_from_dest (s->opb->o.label);
unuse_label (s->opb->o.label);
s->opb->o.label = sb->statements->opa->o.label;
invert_conditional (s);
sb->reachable = 0;
@ -1169,8 +1174,7 @@ remove_dead_blocks (sblock_t *blocks)
label = s->opa->o.label;
else if (is_conditional (s))
label = s->opb->o.label;
if (label && !--label->used)
remove_label_from_dest (label);
unuse_label (label);
did_something = 1;
sblock->next = sb->next;