refresh stale Tmp.link before use

During coalescing, the resizing/
reordering of the sl[] array
invalidates the indices stored
in the 'visit' field of temps;
we need to reset it before we
can use it again.

1 files changed, 5 insertions, 0 deletions

diff --git a/mem.c b/mem.c
index 8bde4be..36359a0 100644
--- a/mem.c
+++ b/mem.c
@@ -406,6 +406,11 @@ coalesce(Fn *fn)
 	/* substitute fused slots */
 	for (s=sl; s<&sl[nsl]; s++) {
 		t = &fn->tmp[s->t];
+		/* the visit link is stale,
+		 * reset it before the slot()
+		 * calls below
+		 */
+		t->visit = s-sl;
 		assert(t->ndef == 1 && t->def);
 		if (s->s == s)
 			continue;