qbe

commit 11db0b61d95d63830e1e87f20464b10c5d316d0f
parent 935ab611f0fd841f4f7e54c95ea2e57bba44f8ab
Author: Quentin Carbonneaux <quentin.carbonneaux@yale.edu>
Date:   Fri, 10 Jul 2015 12:37:41 -0400

properly clear predecessors in fillpreds

Diffstat:
M
lisc/lisc.h
 | 
2
+-
M
lisc/ssa.c
 | 
1
+

2 files changed, 2 insertions(+), 1 deletion(-)
diff --git 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
@@ -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)