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

compiler/testData/diagnostics/tests/dataFlow/assignment/assignToNewVal.fir.kt

@@ -0,0 +1,10 @@
+fun test(a: Any?) {
+    if (a == null) return
+    a.hashCode()
+
+    val b = a
+    b.hashCode()
+
+    val c: Any? = a
+    c.hashCode()
+}

compiler/testData/diagnostics/tests/dataFlow/assignment/kt6118.fir.kt

@@ -0,0 +1,16 @@
+// KT-6118 Redundant type cast can be not redundant?
+
+fun foo(o: Any) {
+    if (o is String) {
+        val s = o as String
+        s.length
+    }
+}
+
+fun foo1(o: Any) {
+    if (o is String) {
+        o.length
+        val s = o
+        s.length
+    }
+}

compiler/testData/diagnostics/tests/dataFlow/assignment/uninitializedValIsCheck.fir.kt

@@ -0,0 +1,15 @@
+fun test(a: Any?, flag: Boolean, x: Any?) {
+    if (a !is String) return
+    a.length
+
+    val b: Any?
+
+    if (flag) {
+        b = a
+        b.length
+    }
+    else {
+        b = x
+        b.<!UNRESOLVED_REFERENCE!>length<!>()
+    }
+}

compiler/testData/diagnostics/tests/dataFlow/assignment/uninitializedValNullability.fir.kt

@@ -0,0 +1,15 @@
+fun test(a: Any?, flag: Boolean, x: Any?) {
+    if (a == null) return
+    a.hashCode()
+
+    val b: Any?
+
+    if (flag) {
+        b = a
+        b.hashCode()
+    }
+    else {
+        b = x
+        b.hashCode()
+    }
+}

compiler/testData/diagnostics/tests/dataFlow/assignment/when.fir.kt

@@ -0,0 +1,12 @@
+fun test(a: Any?) {
+    when (a) {
+        is String -> {
+            val s = a
+            s.length
+        }
+        "" -> {
+            val s = a
+            s.hashCode()
+        }
+    }
+}