Introduce FIR_IDENTICAL for FIR vs old frontend tests #KT-36879 Fixed

compiler/testData/diagnostics/tests/classObjects/ClassObjectCannotAccessClassFields.fir.kt

@@ -1,9 +0,0 @@
-// http://youtrack.jetbrains.net/issue/KT-20
-
-class A() {
-    val x = 1
-
-    companion object {
-        val y = <!UNRESOLVED_REFERENCE!>x<!>
-    }
-}

compiler/testData/diagnostics/tests/classObjects/ClassObjectCannotAccessClassFields.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // http://youtrack.jetbrains.net/issue/KT-20
 
 class A() {

compiler/testData/diagnostics/tests/classObjects/builtInClassObjects.fir.kt

@@ -1,43 +0,0 @@
-// !DIAGNOSTICS: -UNUSED_VARIABLE, -UNUSED_PARAMETER
-
-fun box(): String {
-    try {
-        // Objects
-        val i = Int
-        val d = Double
-        val f = Float
-        val l = Long
-        val sh = Short
-        val b = Byte
-        val ch = Char
-        val st = String
-
-        test(Int)
-        test(Double)
-        test(Float)
-        test(Long)
-        test(Short)
-        test(Byte)
-        test(String)
-        test(Char)
-
-        // Common Double
-        Double.POSITIVE_INFINITY
-        Double.NEGATIVE_INFINITY
-        Double.NaN
-
-        // Common Float
-        Float.POSITIVE_INFINITY
-        Float.NEGATIVE_INFINITY
-        Float.NaN
-    }
-    catch (e: Throwable) {
-        return "Error: \n" + e
-    }
-
-    return "OK"
-}
-
-fun test(a: Any) {}
-
-

compiler/testData/diagnostics/tests/classObjects/builtInClassObjects.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 // !DIAGNOSTICS: -UNUSED_VARIABLE, -UNUSED_PARAMETER
 
 fun box(): String {

compiler/testData/diagnostics/tests/classObjects/importClassInClassObject.fir.kt

@@ -1,11 +0,0 @@
-package f
-
-import f.A.Companion.B
-
-class A {
-    companion object {
-        class B
-    }
-}
-
-fun test() = B()

compiler/testData/diagnostics/tests/classObjects/importClassInClassObject.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 package f
 
 import f.A.Companion.B

compiler/testData/diagnostics/tests/classObjects/resolveFunctionInsideClassObject.fir.kt

@@ -1,9 +0,0 @@
-package test
-
-class Test {
-  fun test(): Int = 12
-
-  companion object {
-    val a = <!UNRESOLVED_REFERENCE!>test<!>() // Check if resolver will be able to infer type of a variable
-  }
-}

compiler/testData/diagnostics/tests/classObjects/resolveFunctionInsideClassObject.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 package test
 
 class Test {