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

compiler/testData/diagnostics/tests/declarationChecks/kt2643MultiDeclInControlFlow.fir.kt

@@ -0,0 +1,27 @@
+//KT-2643 Support multi-declarations in Data-Flow analysis
+package n
+
+class C {
+    operator fun component1() = 1
+    operator fun component2() = 2
+}
+
+fun test1(c: C) {
+    val (a, b) = c
+}
+
+fun test2(c: C) {
+    val (a, b) = c
+    a + 3
+}
+
+fun test3(c: C) {
+    var (a, b) = c
+    a = 3
+}
+
+fun test4(c: C) {
+    var (a, b) = c
+    a = 3
+    a + 1
+}