qbe

commit 1a76fd11f501d0bf762e01661d8a67c18c3e01bd
parent 7e1c1f9f779aa4d55c3cbc9e16a9f8f2884dd3fe
Author: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date:   Mon,  6 Feb 2017 14:37:43 -0500

robustness fix in fillfron()

This makes it possible to call it several times in a row.

Diffstat:
M
cfg.c
 | 
2
++

1 file changed, 2 insertions(+), 0 deletions(-)
diff --git a/cfg.c b/cfg.c
@@ -219,6 +219,8 @@ fillfron(Fn *fn)
 {
 	Blk *a, *b;
 
+	for (b=fn->start; b; b=b->link)
+		b->nfron = 0;
 	for (b=fn->start; b; b=b->link) {
 		if (b->s1)
 			for (a=b; !sdom(a, b->s1); a=a->idom)