Add hashCode() for primitives. (#104)

backend.native/tests/build.gradle

@@ -443,6 +443,11 @@ task interface0(type: RunKonanTest) {
     source = "runtime/basic/interface0.kt"
 }
 
+task hash0(type: RunKonanTest) {
+    goldValue = "239\n0\n97\n1065353216\n1072693248\n1\n0\ntrue\ntrue\n"
+    source = "runtime/basic/hash0.kt"
+}
+
 task array_list1(type: RunKonanTest) {
     goldValue = "OK\n"
     source = "runtime/collections/array_list1.kt"

backend.native/tests/runtime/basic/hash0.kt

@@ -0,0 +1,18 @@
+fun main(args : Array<String>) {
+    println(239.hashCode())
+    println((-1L).hashCode())
+    println('a'.hashCode())
+    println(1.0f.hashCode())
+    println(1.0.hashCode())
+    println(true.hashCode())
+    println(false.hashCode())
+    println(Any().hashCode() != Any().hashCode())
+    val a = CharArray(5)
+    a[0] = 'H'
+    a[1] = 'e'
+    a[2] = 'l'
+    a[3] = 'l'
+    a[4] = 'o'
+    // Note that it uses private Konan API.
+    println("Hello".hashCode() == fromCharArray(a, 0, 5).hashCode())
+}

runtime/src/main/cpp/Operator.cpp

@@ -248,8 +248,13 @@ KLong   Kotlin_Long_dec              (KLong a           ) { return --a; }
 KLong   Kotlin_Long_unaryPlus        (KLong a           ) { return  +a; }
 KLong   Kotlin_Long_unaryMinus       (KLong a           ) { return  -a; }
 
-KLong   Kotlin_Long_xor_Long         (KLong a, KLong   b) { return a^b; }
+KLong   Kotlin_Long_xor_Long         (KLong a, KLong   b) { return a ^ b; }
-KLong   Kotlin_Long_ushr_Long        (KLong a, KLong   b) { return a >> b; }
+KLong   Kotlin_Long_shr_Int          (KLong a, KInt    b) {
+  return a >> b;
+}
+KLong   Kotlin_Long_ushr_Int         (KLong a, KInt    b) {
+  return static_cast<uint64_t>(a) >> b;
+}
 
 KByte   Kotlin_Long_toByte           (KLong a           ) { return a; }
 KShort  Kotlin_Long_toShort          (KLong a           ) { return a; }
@@ -314,6 +319,15 @@ KLong   Kotlin_Float_toLong           (KFloat a           ) { return a; }
 KFloat  Kotlin_Float_toFloat          (KFloat a           ) { return a; }
 KDouble Kotlin_Float_toDouble         (KFloat a           ) { return a; }
 
+KInt   Kotlin_Float_bits              (KFloat a) {
+  union {
+    KFloat f;
+    KInt i;
+  } alias;
+  alias.f = a;
+  return alias.i;
+}
+
 //--- Double ------------------------------------------------------------------//
 
 KInt    Kotlin_Double_compareTo_Byte   (KDouble a, KByte   b) { if (a == b) return 0; return (a < b) ? -1 : 1; }
@@ -369,4 +383,14 @@ KInt    Kotlin_Double_toInt            (KDouble a           ) { return a; }
 KLong   Kotlin_Double_toLong           (KDouble a           ) { return a; }
 KFloat  Kotlin_Double_toFloat          (KDouble a           ) { return a; }
 KDouble Kotlin_Double_toDouble         (KDouble a           ) { return a; }
-}  // extern "C"
+
+KLong   Kotlin_Double_bits             (KDouble a) {
+  union {
+    KDouble d;
+    KLong l;
+  } alias;
+  alias.d = a;
+  return alias.l;
+}
+
+}  // extern "C"

runtime/src/main/kotlin/kotlin/Boolean.kt

@@ -35,4 +35,8 @@ public final class Boolean : Comparable<Boolean> {
     // Konan-specific.
     @SymbolName("Kotlin_Boolean_toString")
     external public override fun toString(): String
+
+    public override fun hashCode(): Int {
+        return if (this) 1 else 0;
+    }
 }

runtime/src/main/kotlin/kotlin/Char.kt

@@ -94,5 +94,9 @@ public final class Char : Comparable<Char> {
     // Konan-specific.
     @SymbolName("Kotlin_Char_toString")
     external public override fun toString(): String
+
+    public override fun hashCode(): Int {
+        return this.toInt();
+    }
 }
 

runtime/src/main/kotlin/kotlin/Primitives.kt

@@ -203,6 +203,10 @@ public final class Byte : Number(), Comparable<Byte> {
     // Konan-specific.
     @SymbolName("Kotlin_Byte_toString")
     external public override fun toString(): String
+
+    public override fun hashCode(): Int {
+        return this.toInt()
+    }
 }
 
 /**
@@ -408,6 +412,10 @@ public final class Short : Number(), Comparable<Short> {
     // Konan-specific.
     @SymbolName("Kotlin_Short_toString")
     external public override fun toString(): String
+
+    public override fun hashCode(): Int {
+        return this.toInt()
+    }
 }
 
 /**
@@ -635,6 +643,10 @@ public final class Int : Number(), Comparable<Int> {
     // Konan-specific.
     @SymbolName("Kotlin_Int_toString")
     external public override fun toString(): String
+
+    public override fun hashCode(): Int {
+        return this
+    }
 }
 
 /**
@@ -826,10 +838,10 @@ public final class Long : Number(), Comparable<Long> {
     @SymbolName("Kotlin_Long_shl_Long")
     external public infix fun shl(bitCount: Int): Long
     /** Shifts this value right by [bits], filling the leftmost bits with copies of the sign bit. */
-    @SymbolName("Kotlin_Long_shr_Long")
+    @SymbolName("Kotlin_Long_shr_Int")
     external public infix fun shr(bitCount: Int): Long
     /** Shifts this value right by [bits], filling the leftmost bits with zeros. */
-    @SymbolName("Kotlin_Long_ushr_Long")
+    @SymbolName("Kotlin_Long_ushr_Int")
     external public infix fun ushr(bitCount: Int): Long
     /** Performs a bitwise AND operation between the two values. */
     @SymbolName("Kotlin_Long_and_Long")
@@ -862,6 +874,10 @@ public final class Long : Number(), Comparable<Long> {
     // Konan-specific.
     @SymbolName("Kotlin_Long_toString")
     external public override fun toString(): String
+
+    public override fun hashCode(): Int {
+       return ((this ushr 32) xor this).toInt()
+    }
 }
 
 /**
@@ -1047,7 +1063,6 @@ public final class Float : Number(), Comparable<Float> {
     @SymbolName("Kotlin_Float_unaryMinus")
     external public operator fun unaryMinus(): Float
 
-
     @SymbolName("Kotlin_Float_toByte")
     external public override fun toByte(): Byte
     @SymbolName("Kotlin_Float_toChar")
@@ -1066,6 +1081,13 @@ public final class Float : Number(), Comparable<Float> {
     // Konan-specific.
     @SymbolName("Kotlin_Float_toString")
     external public override fun toString(): String
+
+    public override fun hashCode(): Int {
+        return bits()
+    }
+
+    @SymbolName("Kotlin_Float_bits")
+    external public fun bits(): Int
 }
 
 /**
@@ -1270,4 +1292,11 @@ public final class Double : Number(), Comparable<Double> {
     // Konan-specific.
     @SymbolName("Kotlin_Double_toString")
     external public override fun toString(): String
+
+    public override fun hashCode(): Int {
+        return bits().hashCode()
+    }
+
+    @SymbolName("Kotlin_Double_bits")
+    external public fun bits(): Long
 }