Improve object arrays support. (#182)

Also fix the way how symbol names are being generated. Before arrays2.kt was not linking.

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/IrToBitcode.kt

@@ -1671,7 +1671,7 @@ internal class CodeGeneratorVisitor(val context: Context) : IrElementVisitorVoid
             val typeInfo = codegen.typeInfoValue(containingClass)
             val allocHint = Int32(1).llvm
             val thisValue = if (containingClass.isArray) {
-                assert(args.size == 1 && args[0].type == int32Type)
+                assert(args.size >= 1 && args[0].type == int32Type)
                 val allocArrayInstanceArgs = listOf(typeInfo, allocHint, args[0])
                 call(context.llvm.allocArrayFunction, allocArrayInstanceArgs)
             } else {

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/NameUtils.kt

@@ -21,7 +21,7 @@ private val exportForCppRuntimeAnnotation = FqName("konan.internal.ExportForCppR
 fun typeToHashString(type: KotlinType): String {
     if (TypeUtils.isTypeParameter(type)) return "GENERIC"
 
-    var hashString = type.constructor.toString()
+    var hashString = TypeUtils.getClassDescriptor(type)!!.fqNameSafe.asString()
     if (!type.arguments.isEmpty()) {
         hashString += "<${type.arguments.map {
             typeToHashString(it.type)

backend.native/tests/build.gradle

@@ -301,6 +301,11 @@ task array1(type: RunKonanTest) {
     source = "runtime/collections/array1.kt"
 }
 
+task array2(type: RunKonanTest) {
+    goldValue = "0\n2\n4\n6\n8\n40\n"
+    source = "runtime/collections/array2.kt"
+}
+
 task if_else(type: RunKonanTest) {
     source = "codegen/branching/if_else.kt"
 }
@@ -536,6 +541,10 @@ task moderately_large_array(type: RunKonanTest) {
     source = "runtime/collections/moderately_large_array.kt"
 }
 
+task moderately_large_array1(type: RunKonanTest) {
+    goldValue = "-45392\n"
+    source = "runtime/collections/moderately_large_array1.kt"
+}
 
 task string_builder0(type: RunKonanTest) {
     goldValue = "OK\n"

backend.native/tests/codegen/basics/array_to_any.kt

@@ -3,5 +3,5 @@ fun main(args: Array<String>) {
 }
 
 fun foo(): Any {
-    return Array<Any?>(0)
+    return Array<Any?>(0, { i -> null })
 }

backend.native/tests/runtime/collections/array0.kt

@@ -24,6 +24,6 @@ fun main(args : Array<String>) {
     val booleanArray = BooleanArray(12)
     println(booleanArray.size.toString())
 
-    val stringArray = Array<String>(13)
+    val stringArray = Array<String>(13, { i -> ""})
     println(stringArray.size.toString())
 }

backend.native/tests/runtime/collections/array2.kt

@@ -0,0 +1,7 @@
+fun main(args : Array<String>) {
+    val byteArray = Array<Byte>(5, { i -> (i * 2).toByte() })
+    byteArray.map { println(it) }
+
+    val intArray = Array<Int>(5, { i -> i * 4 })
+    println(intArray.sum())
+}

backend.native/tests/runtime/collections/moderately_large_array1.kt

@@ -0,0 +1,11 @@
+fun main(args: Array<String>) {
+    val a = Array<Byte>(100000, { i -> i.toByte()})
+
+    var sum = 0
+    for (b in a) {
+        sum += b
+    }
+
+    println(sum)
+}
+

runtime/src/main/kotlin/kotlin/Array.kt

@@ -3,9 +3,15 @@ package kotlin
 // TODO: remove that, as RTTI shall be per instantiation.
 @ExportTypeInfo("theArrayTypeInfo")
 public final class Array<T> : Cloneable {
-    // TODO: actual constructor has initializer parameter, implement it once lambdas are implemented.
     // Constructors are handled with compiler magic.
-    public constructor(@Suppress("UNUSED_PARAMETER") size: Int) {}
+    public constructor(size: Int, init: (Int) -> T) {
+        var index = 0
+        while (index < size) {
+            this[index] = init(index)
+            index++
+        }
+    }
+    internal constructor(@Suppress("UNUSED_PARAMETER") size: Int) {}
 
     public val size: Int
         get() = getArrayLength()

runtime/src/main/kotlin/kotlin/Arrays.kt

@@ -507,3 +507,89 @@ public val <T> Array<out T>.indices: IntRange
  */
 public val <T> Array<out T>.lastIndex: Int
     get() = size - 1
+
+/**
+ * Applies the given [transform] function to each element of the original array
+ * and appends the results to the given [destination].
+ */
+public inline fun <T, R, C : MutableCollection<in R>> Array<out T>.mapTo(destination: C, transform: (T) -> R): C {
+    for (item in this)
+        destination.add(transform(item))
+    return destination
+}
+
+/**
+ * Returns a list containing the results of applying the given [transform] function
+ * to each element in the original array.
+ */
+public inline fun <T, R> Array<out T>.map(transform: (T) -> R): List<R> {
+    return mapTo(ArrayList<R>(size), transform)
+}
+
+/**
+ * Returns the sum of all elements in the array.
+ */
+public fun Array<out Byte>.sum(): Int {
+    var sum: Int = 0
+    for (element in this) {
+        sum += element
+    }
+    return sum
+}
+
+/**
+ * Returns the sum of all elements in the array.
+ */
+public fun Array<out Short>.sum(): Int {
+    var sum: Int = 0
+    for (element in this) {
+        sum += element
+    }
+    return sum
+}
+
+/**
+ * Returns the sum of all elements in the array.
+ */
+public fun Array<out Int>.sum(): Int {
+    var sum: Int = 0
+    for (element in this) {
+        sum += element
+    }
+    return sum
+}
+
+/**
+ * Returns the sum of all elements in the array.
+ */
+public fun Array<out Long>.sum(): Long {
+    var sum: Long = 0L
+    for (element in this) {
+        sum += element
+    }
+    return sum
+}
+
+/**
+ * Returns the sum of all elements in the array.
+ */
+public fun Array<out Float>.sum(): Float {
+    var sum: Float = 0.0f
+    for (element in this) {
+        sum += element
+    }
+    return sum
+}
+
+/**
+ * Returns the sum of all elements in the array.
+ */
+public fun Array<out Double>.sum(): Double {
+    var sum: Double = 0.0
+    for (element in this) {
+        sum += element
+    }
+    return sum
+}
+
+

runtime/src/main/kotlin/kotlin/collections/ArrayUtil.kt

@@ -1,13 +1,13 @@
 package kotlin.collections
 
 /**
- * Returns an array of objects of the given type with the given [size], initialized with **lateinit** _uninitialized_ values.
+ * Returns an array of objects of the given type with the given [size], initialized with _uninitialized_ values.
  * Attempts to read _uninitialized_ values from this array work in implementation-dependent manner,
  * either throwing exception or returning some kind of implementation-specific default value.
  */
-fun <E> arrayOfUninitializedElements(size: Int): Array<E> {
-   // return (if (size == 0) emptyArray else Array<Any>(size)) as Array<E>
-   return Array<E>(size)
+internal fun <E> arrayOfUninitializedElements(size: Int): Array<E> {
+    // TODO: special case for size == 0?
+    return Array<E>(size)
 }
 
 /**
@@ -16,7 +16,7 @@ fun <E> arrayOfUninitializedElements(size: Int): Array<E> {
  * either throwing exception or returning some kind of implementation-specific default value.
  */
 fun <E> Array<E>.copyOfUninitializedElements(newSize: Int): Array<E> {
-    val result = Array<E>(newSize)
+    val result = arrayOfUninitializedElements<E>(newSize)
     this.copyRangeTo(result, 0, if (newSize > this.size) this.size else newSize, 0)
     return result
 }
@@ -33,7 +33,7 @@ fun IntArray.copyOfUninitializedElements(newSize: Int): IntArray {
  * Attempts to read _uninitialized_ value work in implementation-dependent manner,
  * either throwing exception or returning some kind of implementation-specific default value.
  */
-fun <E> Array<E>.resetAt(index: Int) {
+internal fun <E> Array<E>.resetAt(index: Int) {
     (@Suppress("UNCHECKED_CAST")(this as Array<Any?>))[index] = null
 }
 
@@ -50,11 +50,11 @@ external private fun fillImpl(array: IntArray, fromIndex: Int, toIndex: Int, val
  * Attempts to read _uninitialized_ values work in implementation-dependent manner,
  * either throwing exception or returning some kind of implementation-specific default value.
  */
-fun <E> Array<E>.resetRange(fromIndex: Int, toIndex: Int) {
+internal fun <E> Array<E>.resetRange(fromIndex: Int, toIndex: Int) {
     fillImpl(@Suppress("UNCHECKED_CAST") (this as Array<Any>), fromIndex, toIndex, null)
 }
 
-fun IntArray.fill(fromIndex: Int, toIndex: Int, value: Int) {
+internal fun IntArray.fill(fromIndex: Int, toIndex: Int, value: Int) {
     fillImpl(this, fromIndex, toIndex, value)
 }