From 11db0b61d95d63830e1e87f20464b10c5d316d0f Mon Sep 17 00:00:00 2001
From: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date: Fri, 10 Jul 2015 12:37:41 -0400
Subject: properly clear predecessors in fillpreds

---
 lisc/lisc.h | 2 +-
 lisc/ssa.c  | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisc/lisc.h b/lisc/lisc.h
index bd17025..da735f0 100644
--- a/lisc/lisc.h
+++ b/lisc/lisc.h
@@ -86,9 +86,9 @@ struct Blk {
 	} jmp;
 	Blk *s1;
 	Blk *s2;
+	Blk *link;
 
 	char name[NString];
-	Blk *link;
 	Blk **preds;
 	int npreds;
 };
diff --git a/lisc/ssa.c b/lisc/ssa.c
index 6f28634..e01bcc6 100644
--- a/lisc/ssa.c
+++ b/lisc/ssa.c
@@ -23,6 +23,7 @@ fillpreds(Fn *f)
 	for (b=f->start; b; b=b->link) {
 		b->npreds = 0;
 		free(b->preds);
+		b->preds = 0;
 	}
 	for (b=f->start; b; b=b->link) {
 		if (b->s1)
-- 
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