fix bug of lhs getting culled if same node optimized out of rhs

1 files changed, 3 insertions, 2 deletions

diff --git a/test.lang b/test.lang
index 2277fc3..c2661a4 100644
--- a/test.lang
+++ b/test.lang
@@ -9,6 +9,7 @@
 // also single-line now
 
 proc main(a i64) {
-	return a + -a
-	// (true = 0) = (a xor b)
+	let x = (a + -a) = (a xor a)
+	let y = (a + a) = (a * 2)
+	return x & y & (a = a) & ((a + 2) <> a)
 }