[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/smartCasts/lambdaDeclaresAndModifiesWithDirectEq.fir.kt

@@ -0,0 +1,20 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+fun foo(arg: Int?) = run {
+    var x = arg
+    if (x == null) return@run
+    x.hashCode()
+}
+
+class My {
+    fun foo(arg: Int?) = run {
+        var x = arg
+        if (x == null) return@run
+        x.hashCode()
+    }
+
+    fun Int?.bar() = run {
+        var x = this
+        if (x == null) return@run
+        x.hashCode()
+    }
+}