JS: represent long as BigInt if available

core/src/main/java/org/teavm/backend/javascript/rendering/NameFrequencyEstimator.java

@@ -312,8 +312,10 @@ class NameFrequencyEstimator extends RecursiveVisitor implements MethodNodeVisit
         if (expr.getSource() == OperationType.LONG) {
             if (expr.getTarget() == OperationType.DOUBLE || expr.getTarget() == OperationType.FLOAT) {
                 consumer.consumeFunction("Long_toNumber");
+            } else if (expr.getTarget() == OperationType.INT) {
+                consumer.consumeFunction("Long_lo");
             }
-        } else {
+        } else if (expr.getTarget() == OperationType.LONG) {
             switch (expr.getSource()) {
                 case INT:
                     consumer.consumeFunction("Long_fromInt");
@@ -339,7 +341,7 @@ class NameFrequencyEstimator extends RecursiveVisitor implements MethodNodeVisit
             } else if ((int) value == value) {
                 consumer.consumeFunction("Long_fromInt");
             } else {
-                consumer.consumeFunction("Long");
+                consumer.consumeFunction("Long_create");
             }
         }
     }

core/src/main/java/org/teavm/backend/javascript/rendering/Renderer.java

@@ -261,7 +261,8 @@ public class Renderer implements RenderingManager {
                 "$rt_createLongArrayFromData", "$rt_createBooleanArray", "$rt_createByteArray",
                 "$rt_createShortArray", "$rt_createCharArray", "$rt_createIntArray", "$rt_createLongArray",
                 "$rt_createFloatArray", "$rt_createDoubleArray", "$rt_compare",
-                "Long_toNumber", "Long_fromInt", "Long_fromNumber", "Long", "Long_ZERO");
+                "Long_toNumber", "Long_fromInt", "Long_fromNumber", "Long_create", "Long_ZERO",
+                "Long_hi", "Long_lo");
     }
 
     public void renderLongRuntimeAliases() throws IOException {

core/src/main/java/org/teavm/backend/javascript/rendering/RenderingContext.java

@@ -239,7 +239,7 @@ public class RenderingContext {
             } else if ((int) value == value) {
                 writer.appendFunction("Long_fromInt").append("(").append(String.valueOf(value)).append(")");
             } else {
-                writer.append("new ").appendFunction("Long").append("(" + (value & 0xFFFFFFFFL)
+                writer.appendFunction("Long_create").append("(" + (value & 0xFFFFFFFFL)
                         + ", " + (value >>> 32) + ")");
             }
         } else if (cst instanceof Character) {

core/src/main/java/org/teavm/backend/javascript/rendering/StatementRenderer.java

@@ -929,11 +929,13 @@ public class StatementRenderer implements ExprVisitor, StatementVisitor {
                             precedence = Precedence.MEMBER_ACCESS;
                             Expr longShifted = extractLongRightShiftedBy32(expr.getValue());
                             if (longShifted != null) {
+                                writer.appendFunction("Long_hi").append("(");
                                 longShifted.acceptVisitor(this);
-                                writer.append(".hi");
+                                writer.append(")");
                             } else {
+                                writer.appendFunction("Long_lo").append("(");
                                 expr.getValue().acceptVisitor(this);
-                                writer.append(".lo");
+                                writer.append(")");
                             }
                             break;
                         case FLOAT:

core/src/main/resources/org/teavm/backend/javascript/runtime.js

@@ -74,18 +74,31 @@ function $rt_wrapArray(cls, data) {
 function $rt_createUnfilledArray(cls, sz) {
     return new $rt_array(cls, new Array(sz));
 }
-function $rt_createLongArray(sz) {
-    var data = new Array(sz);
-    var arr = new $rt_array($rt_longcls(), data);
-    data.fill(Long_ZERO);
-    return arr;
-}
-function $rt_createLongArrayFromData(init) {
-    return new $rt_array($rt_longcls(), init);
-}
 function $rt_createNumericArray(cls, nativeArray) {
     return new $rt_array(cls, nativeArray);
 }
+var $rt_createLongArray;
+var $rt_createLongArrayFromData;
+if (typeof BigInt !== 'function') {
+    $rt_createLongArray = function(sz) {
+        var data = new Array(sz);
+        var arr = new $rt_array($rt_longcls(), data);
+        data.fill(Long_ZERO);
+        return arr;
+    }
+    $rt_createLongArrayFromData = function(init) {
+        return new $rt_array($rt_longcls(), init);
+    }
+} else {
+    $rt_createLongArray = function (sz) {
+        return $rt_createNumericArray($rt_longcls(), new BigInt64Array(sz));
+    }
+    $rt_createLongArrayFromData = function(data) {
+        var buffer = new BigInt64Array(data.length);
+        buffer.set(data);
+        return $rt_createNumericArray($rt_longcls(), buffer);
+    }
+}
 function $rt_createCharArray(sz) {
     return $rt_createNumericArray($rt_charcls(), new Uint16Array(sz));
 }
@@ -630,15 +643,29 @@ function $rt_eraseClinit(target) {
 
 var $rt_numberConversionView = new DataView(new ArrayBuffer(8));
 
-function $rt_doubleToLongBits(n) {
+var $rt_doubleToLongBits;
-    $rt_numberConversionView.setFloat64(0, n, true);
+var $rt_longBitsToDouble;
-    return new Long($rt_numberConversionView.getInt32(0, true), $rt_numberConversionView.getInt32(4, true));
+if (typeof BigInt !== 'function') {
-}
+    $rt_doubleToLongBits = function(n) {
-function $rt_longBitsToDouble(n) {
+        $rt_numberConversionView.setFloat64(0, n, true);
-    $rt_numberConversionView.setInt32(0, n.lo, true);
+        return new Long($rt_numberConversionView.getInt32(0, true), $rt_numberConversionView.getInt32(4, true));
-    $rt_numberConversionView.setInt32(4, n.hi, true);
+    }
-    return $rt_numberConversionView.getFloat64(0, true);
+    $rt_longBitsToDouble = function(n) {
+        $rt_numberConversionView.setInt32(0, n.lo, true);
+        $rt_numberConversionView.setInt32(4, n.hi, true);
+        return $rt_numberConversionView.getFloat64(0, true);
+    }
+} else {
+    $rt_doubleToLongBits = function(n) {
+        $rt_numberConversionView.setFloat64(0, n, true);
+        return $rt_numberConversionView.getBigInt64(0, true);
+    }
+    $rt_longBitsToDouble = function(n) {
+        $rt_numberConversionView.setBigInt64(0, n, true);
+        return $rt_numberConversionView.getFloat64(0, true);
+    }
 }
+
 function $rt_floatToIntBits(n) {
     $rt_numberConversionView.setFloat32(0, n);
     return $rt_numberConversionView.getInt32(0);
@@ -697,46 +724,94 @@ function $dbg_class(obj) {
     }
     return clsName;
 }
-function Long(lo, hi) {
-    this.lo = lo | 0;
-    this.hi = hi | 0;
-}
-Long.prototype.__teavm_class__ = function() {
-    return "long";
-};
-Long.prototype.toString = function() {
-    var result = [];
-    var n = this;
-    var positive = Long_isPositive(n);
-    if (!positive) {
-        n = Long_neg(n);
-    }
-    var radix = new Long(10, 0);
-    do {
-        var divRem = Long_divRem(n, radix);
-        result.push(String.fromCharCode(48 + divRem[1].lo));
-        n = divRem[0];
-    } while (n.lo !== 0 || n.hi !== 0);
-    result = result.reverse().join('');
-    return positive ? result : "-" + result;
-};
-Long.prototype.valueOf = function() {
-    return Long_toNumber(this);
-};
-var Long_ZERO = new Long(0, 0);
 var Long_MAX_NORMAL = 1 << 18;
-function Long_fromInt(val) {
+var Long_ZERO;
-    return new Long(val, (-(val < 0)) | 0);
+var Long_create;
-}
+var Long_fromInt;
-function Long_fromNumber(val) {
+var Long_fromNumber;
-    if (val >= 0) {
+var Long_toNumber;
-        return new Long(val | 0, (val / 0x100000000) | 0);
+var Long_hi;
-    } else {
+var Long_lo;
-        return Long_neg(new Long(-val | 0, (-val / 0x100000000) | 0));
+if (typeof BigInt !== "function") {
+    function Long(lo, hi) {
+        this.lo = lo | 0;
+        this.hi = hi | 0;
+    }
+    Long.prototype.__teavm_class__ = function() {
+        return "long";
+    };
+
+    function Long_isPositive(a) {
+        return (a.hi & 0x80000000) === 0;
+    }
+
+    function Long_isNegative(a) {
+        return (a.hi & 0x80000000) !== 0;
+    }
+
+    Long.prototype.toString = function() {
+        var result = [];
+        var n = this;
+        var positive = Long_isPositive(n);
+        if (!positive) {
+            n = Long_neg(n);
+        }
+        var radix = new Long(10, 0);
+        do {
+            var divRem = Long_divRem(n, radix);
+            result.push(String.fromCharCode(48 + divRem[1].lo));
+            n = divRem[0];
+        } while (n.lo !== 0 || n.hi !== 0);
+        result = result.reverse().join('');
+        return positive ? result : "-" + result;
+    };
+    Long.prototype.valueOf = function() {
+        return Long_toNumber(this);
+    };
+
+    Long_ZERO = new Long(0, 0);
+    Long_fromInt = function(val) {
+        return new Long(val, (-(val < 0)) | 0);
+    }
+    Long_fromNumber = function(val) {
+        if (val >= 0) {
+            return new Long(val | 0, (val / 0x100000000) | 0);
+        } else {
+            return Long_neg(new Long(-val | 0, (-val / 0x100000000) | 0));
+        }
+    }
+    Long_create = function(lo, hi) {
+        return new Long(hi, lo);
+    }
+    Long_toNumber = function(val) {
+        return 0x100000000 * val.hi + (val.lo >>> 0);
+    }
+    Long_hi = function(val) {
+        return val.hi;
+    }
+    Long_lo = function(val) {
+        return val.lo;
+    }
+} else {
+    Long_ZERO = BigInt(0);
+    Long_create = function(lo, hi) {
+        return BigInt.asIntN(64, BigInt(lo) | (BigInt(hi) << BigInt(32)));
+    }
+    Long_fromInt = function(val) {
+        return BigInt(val);
+    }
+    Long_fromNumber = function(val) {
+        return BigInt(val >= 0 ? Math.floor(val) : Math.ceil(val));
+    }
+    Long_toNumber = function(val) {
+        return Number(val);
+    }
+    Long_hi = function(val) {
+        return Number(BigInt.asIntN(64, val >> BigInt(32))) | 0;
+    }
+    Long_lo = function(val) {
+        return Number(BigInt.asIntN(32, val)) | 0;
     }
-}
-function Long_toNumber(val) {
-    return 0x100000000 * val.hi + (val.lo >>> 0);
 }
 var $rt_imul = Math.imul || function(a, b) {
     var ah = (a >>> 16) & 0xFFFF;