JVM IR: Turn static callable references into singletons

compiler/testData/codegen/box/callableReference/function/staticFunctionReference.kt

@@ -0,0 +1,22 @@
+// TARGET_BACKEND: JVM
+
+var capturedRef: ((Int) -> Int)? = null
+
+fun ref(x: Int) = x
+
+fun updateCapturedRef(): Boolean {
+    val r = ::ref
+    if (capturedRef == null) {
+        capturedRef = r
+    } else if (capturedRef !== r) {
+        return false
+    }
+    return true
+}
+
+fun box(): String {
+    updateCapturedRef()
+    if (!updateCapturedRef())
+        return "FAIL"
+    return "OK"
+}