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robustness fix in fillfron()

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This makes it possible to call it several times in a row.
This commit is contained in:
Quentin Carbonneaux 2017-02-06 14:37:43 -05:00
parent 7e1c1f9f77
commit 1a76fd11f5
1 changed files with 2 additions and 0 deletions
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2
cfg.c
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@ -219,6 +219,8 @@ fillfron(Fn *fn)
{ {
Blk *a, *b; Blk *a, *b;
for (b=fn->start; b; b=b->link)
b->nfron = 0;
for (b=fn->start; b; b=b->link) { for (b=fn->start; b; b=b->link) {
if (b->s1) if (b->s1)
for (a=b; !sdom(a, b->s1); a=a->idom) for (a=b; !sdom(a, b->s1); a=a->idom)