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-rw-r--r--lisc/ssa.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/lisc/ssa.c b/lisc/ssa.c
index c08d6b1..c4710f6 100644
--- a/lisc/ssa.c
+++ b/lisc/ssa.c
@@ -46,6 +46,7 @@ rporec(Blk *b, int x)
 {
 	if (b->id >= 0)
 		return x;
+	b->id = 1;
 	if (b->s1)
 		x = rporec(b->s1, x);
 	if (b->s2)