Add ir interpreter tests

compiler/testData/ir/interpreter/abstract4.kt

@@ -0,0 +1,37 @@
+@CompileTimeCalculation
+abstract class BaseIterator(var baseStart: Int) {
+    fun baseNext(): Int {
+        baseStart += 1
+        return base()
+    }
+
+    abstract fun base(): Int
+}
+
+@CompileTimeCalculation
+abstract class ComplexIterator(var complexStart: Int) : BaseIterator(complexStart) {
+    fun complexNext() = abstractCall()
+
+    private fun abstractCall(): Int {
+        complexStart *= 2
+        return complex() + baseNext()
+    }
+
+    abstract fun complex(): Int
+}
+
+@CompileTimeCalculation
+class ImplementIterator constructor(val i: Int) : ComplexIterator(i) {
+    override fun complex(): Int {
+        return complexStart
+    }
+
+    override fun base(): Int {
+        return baseStart
+    }
+}
+
+@CompileTimeCalculation
+fun getIterator(i: Int): ComplexIterator = ImplementIterator(i)
+
+const val next = getIterator(10).<!EVALUATED: `31`!>complexNext()<!>