Handle reversed() in ForLoopsLowering.

We get the info for the underlying progression and invert it. For
progressions whose last bound was open (e.g., `until` loop), the
reversed version will have an open first bound and so the induction
variable must be incremented first.

Also unified the way of extracting HeaderInfo out of changed calls
(e.g., `indices.reversed()`), and fixed declaration parents in
ForLoopsLowering.

compiler/testData/codegen/box/arrays/forInReversed/reversedArrayOriginalUpdatedInLoopBody.kt

@@ -0,0 +1,18 @@
+// KJS_WITH_FULL_RUNTIME
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    val arr = intArrayOf(1, 2, 3, 4)
+    var sum = 0
+    var index = 0
+    for (i in arr.reversedArray()) {
+        // reversedArray() returns a new Array with elements in reversed order.
+        // Modifying the original array should have no effect on the iteration subject.
+        arr[index++] = 0
+        sum = sum * 10 + i
+    }
+    assertEquals(4321, sum)
+
+    return "OK"
+}

compiler/testData/codegen/box/arrays/forInReversed/reversedArrayReversedArrayOriginalUpdatedInLoopBody.kt

@@ -0,0 +1,18 @@
+// KJS_WITH_FULL_RUNTIME
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    val arr = intArrayOf(1, 2, 3, 4)
+    var sum = 0
+    var index = arr.size - 1
+    for (i in arr.reversedArray().reversedArray()) {
+        // reversedArray() returns a new Array with elements in reversed order.
+        // Modifying the original array should have no effect on the iteration subject.
+        arr[index--] = 0
+        sum = sum * 10 + i
+    }
+    assertEquals(1234, sum)
+
+    return "OK"
+}

compiler/testData/codegen/box/arrays/forInReversed/reversedOriginalUpdatedInLoopBody.kt

@@ -0,0 +1,18 @@
+// KJS_WITH_FULL_RUNTIME
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    val arr = intArrayOf(1, 2, 3, 4)
+    var sum = 0
+    var index = 0
+    for (i in arr.reversed()) {
+        // reversed() returns a new List with elements in reversed order.
+        // Modifying the original array should have no effect on the iteration subject.
+        arr[index++] = 0
+        sum = sum * 10 + i
+    }
+    assertEquals(4321, sum)
+
+    return "OK"
+}

compiler/testData/codegen/box/arrays/forInReversed/reversedReversedOriginalUpdatedInLoopBody.kt

@@ -0,0 +1,18 @@
+// KJS_WITH_FULL_RUNTIME
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    val arr = intArrayOf(1, 2, 3, 4)
+    var sum = 0
+    var index = arr.size - 1
+    for (i in arr.reversed().reversed()) {
+        // reversed() returns a new List with elements in reversed order.
+        // Modifying the original array should have no effect on the iteration subject.
+        arr[index--] = 0
+        sum = sum * 10 + i
+    }
+    assertEquals(1234, sum)
+
+    return "OK"
+}

compiler/testData/codegen/box/ranges/forInReversed/forInReversedReversedArrayIndices.kt

@@ -0,0 +1,14 @@
+// KJS_WITH_FULL_RUNTIME
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    val arr = intArrayOf(1, 1, 1, 1)
+    var sum = 0
+    for (i in arr.indices.reversed().reversed()) {
+        sum = sum * 10 + i + arr[i]
+    }
+    assertEquals(1234, sum)
+
+    return "OK"
+}

compiler/testData/codegen/box/ranges/forInReversed/forInReversedReversedDownTo.kt

@@ -0,0 +1,24 @@
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    var sum = 0
+    for (i in (4 downTo 1).reversed().reversed()) {
+        sum = sum * 10 + i
+    }
+    assertEquals(4321, sum)
+
+    var sumL = 0L
+    for (i in (4L downTo 1L).reversed().reversed()) {
+        sumL = sumL * 10 + i
+    }
+    assertEquals(4321, sumL)
+
+    var sumC = 0
+    for (i in ('4' downTo '1').reversed().reversed()) {
+        sumC = sumC * 10 + i.toInt() - '0'.toInt()
+    }
+    assertEquals(4321, sumC)
+
+    return "OK"
+}

compiler/testData/codegen/box/ranges/forInReversed/forInReversedReversedUntil.kt

@@ -0,0 +1,24 @@
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun box(): String {
+    var sum = 0
+    for (i in (1 until 5).reversed().reversed()) {
+        sum = sum * 10 + i
+    }
+    assertEquals(1234, sum)
+
+    var sumL = 0L
+    for (i in (1L until 5L).reversed().reversed()) {
+        sumL = sumL * 10 + i
+    }
+    assertEquals(1234, sumL)
+
+    var sumC = 0
+    for (i in ('1' until '5').reversed().reversed()) {
+        sumC = sumC * 10 + i.toInt() - '0'.toInt()
+    }
+    assertEquals(1234, sumC)
+
+    return "OK"
+}

compiler/testData/codegen/box/ranges/forInReversed/forInReversedReversedUntilWithNonConstBounds.kt

@@ -0,0 +1,31 @@
+// WITH_RUNTIME
+import kotlin.test.*
+
+fun intLow() = 1
+fun intHigh() = 5
+fun longLow() = 1L
+fun longHigh() = 5L
+fun charLow() = '1'
+fun charHigh() = '5'
+
+fun box(): String {
+    var sum = 0
+    for (i in (intLow() until intHigh()).reversed().reversed()) {
+        sum = sum * 10 + i
+    }
+    assertEquals(1234, sum)
+
+    var sumL = 0L
+    for (i in (longLow() until longHigh()).reversed().reversed()) {
+        sumL = sumL * 10 + i
+    }
+    assertEquals(1234, sumL)
+
+    var sumC = 0
+    for (i in (charLow() until charHigh()).reversed().reversed()) {
+        sumC = sumC * 10 + i.toInt() - '0'.toInt()
+    }
+    assertEquals(1234, sumC)
+
+    return "OK"
+}