Intrinsics for 'reversed': downTo

#KT-21323 In Progress

compiler/testData/codegen/bytecodeText/forLoop/forInReversed/forInReversedDownTo.kt

@@ -0,0 +1,26 @@
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    var sum = 0
+    for (i in (4 downTo 1).reversed()) {
+        sum = sum * 10 + i
+    }
+    assertEquals(1234, sum)
+
+    var sumL = 0L
+    for (i in (4L downTo 1L).reversed()) {
+        sumL = sumL * 10 + i
+    }
+    assertEquals(1234L, sumL)
+
+    var sumC = 0
+    for (i in ('4' downTo '1').reversed()) {
+        sumC = sumC * 10 + i.toInt() - '0'.toInt()
+    }
+    assertEquals(1234, sumC)
+
+    return "OK"
+}
+
+// 0 reversed