JVM IR: Turn static callable references into singletons

compiler/testData/codegen/box/closures/staticLambda.kt

@@ -0,0 +1,20 @@
+// TARGET_BACKEND: JVM
+
+var capturedLambda: ((Int) -> Int)? = null
+
+fun captureLambda(): Boolean {
+    val lambda = { x: Int -> x + 1 }
+    if (capturedLambda == null) {
+        capturedLambda = lambda
+    } else if (capturedLambda !== lambda) {
+        return false
+    }
+    return true
+}
+
+fun box(): String {
+    captureLambda()
+    if (!captureLambda())
+        return "FAIL"
+    return "OK"
+}