Keep original casts during reification to avoid VerifyError

#KT-26435 Fixed

compiler/testData/codegen/boxInline/reified/checkCast/kt26435.kt

@@ -0,0 +1,37 @@
+// FILE: 1.kt
+// WITH_RUNTIME
+package test
+
+enum class Id {
+    OK,
+    FAIL
+}
+
+
+sealed class Base(val id: Id)
+class A(id: Id) : Base(id)
+class B(id: Id) : Base(id)
+
+inline fun <reified T : Base> process(t: T, f: (T) -> Unit): Base? {
+    f(t)
+    return getSomeBaseObject(t.id) as? T ?: throw RuntimeException()
+}
+
+fun getSomeBaseObject(id: Id): Base = if (id == Id.OK) A(id) else B(id)
+
+// FILE: 2.kt
+import test.*
+
+fun doSth(base: Base): Base? =
+    if (base is A) process(base, f = ::doSomethingInCaseOfA)
+    else if (base is B) process(base, f = ::doSomethingInCaseOfB) else error("123")
+
+fun doSomethingInCaseOfA(a: A) {}
+
+fun doSomethingInCaseOfB(b: B) {}
+
+fun box(): String {
+    val a = doSth(A(Id.OK))!!
+
+    return a.id.name
+}