Proper equality comparison for bound callable references represented as reflection objects

(including references to property accessors).

compiler/testData/codegen/box/callableReference/bound/equals/propertyAccessors.kt

@@ -0,0 +1,32 @@
+// TODO: investigate should it be ran for JS or not
+// IGNORE_BACKEND: JS
+
+// WITH_REFLECT
+
+import kotlin.reflect.*
+
+class C {
+    var prop = 42
+}
+
+val C_propReflect = C::class.memberProperties.find { it.name == "prop" } as? KMutableProperty1 ?: throw AssertionError()
+val C_prop = C::prop
+val cProp = C()::prop
+
+fun box() =
+        when {
+            C_prop.getter != C_prop.getter -> "C_prop.getter != C_prop.getter"
+            C_propReflect.getter != C_propReflect.getter -> "C_propReflect.getter != C_propReflect.getter"
+            cProp.getter != cProp.getter -> "cProp.getter != cProp.getter"
+
+            cProp.getter == C_prop.getter -> "cProp.getter == C_prop.getter"
+            C_prop.getter == cProp.getter -> "C_prop.getter == cProp.getter"
+            cProp.getter == C_propReflect.getter -> "cProp.getter == C_propReflect.getter"
+            C_propReflect.getter == cProp.getter -> "C_propReflect.getter == cProp.getter"
+
+            // TODO https://youtrack.jetbrains.com/issue/KT-13490
+            // cProp.getter != C()::prop.getter -> "cProp.getter != C()::prop.getter"
+            // cProp.setter != C()::prop.setter -> "cProp.setter != C()::prop.setter"
+
+            else -> "OK"
+        }

compiler/testData/codegen/box/callableReference/bound/equals/reflectionReference.kt

@@ -0,0 +1,35 @@
+// TODO: investigate should it be ran for JS or not
+// IGNORE_BACKEND: JS
+
+// WITH_REFLECT
+
+import kotlin.reflect.*
+
+class C {
+    fun foo() {}
+    val bar = 42
+}
+
+val C_fooReflect = C::class.functions.find { it.name == "foo" }!!
+val C_foo = C::foo
+val cFoo = C()::foo
+
+val C_barReflect = C::class.memberProperties.find { it.name == "bar" }!!
+val C_bar = C::bar
+val cBar= C()::bar
+
+val Any.className: String
+        get() = this::class.qualifiedName!!
+
+fun box(): String =
+        when {
+            C_fooReflect != C_foo -> "C_fooReflect != C_foo, ${C_fooReflect.className}"
+            C_foo != C_fooReflect -> "C_foo != C_fooReflect, ${C_foo.className}"
+            C_fooReflect == cFoo -> "C_fooReflect == cFoo, ${C_fooReflect.className}"
+            cFoo == C_fooReflect -> "cFoo == C_fooReflect, ${cFoo.className}"
+            C_barReflect != C_bar -> "C_barReflect != C_bar, ${C_barReflect.className}"
+            C_bar != C_barReflect -> "C_bar != C_barReflect, ${C_bar.className}"
+            C_barReflect == cBar -> "C_barReflect == cBar, ${C_barReflect.className}"
+            cBar == C_barReflect -> "cBar == C_barReflect, ${cBar.className}"
+            else -> "OK"
+        }