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// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// VMOptions=--optimization-counter-threshold=100 --deterministic
// Tests allocation sinking of arrays and typed data objects.
import 'dart:typed_data';
import 'package:expect/expect.dart';
import 'dart:typed_data';
class Vector2 {
final Float64List _v2storage;
@pragma('vm:prefer-inline')
Vector2.zero() : _v2storage = Float64List(2);
@pragma('vm:prefer-inline')
factory Vector2(double x, double y) => Vector2.zero()..setValues(x, y);
@pragma('vm:prefer-inline')
factory Vector2.copy(Vector2 other) => Vector2.zero()..setFrom(other);
@pragma('vm:prefer-inline')
Vector2 clone() => Vector2.copy(this);
@pragma('vm:prefer-inline')
void setValues(double x_, double y_) {
_v2storage[0] = x_;
_v2storage[1] = y_;
}
@pragma('vm:prefer-inline')
void setFrom(Vector2 other) {
final otherStorage = other._v2storage;
_v2storage[1] = otherStorage[1];
_v2storage[0] = otherStorage[0];
}
@pragma('vm:prefer-inline')
Vector2 operator +(Vector2 other) => clone()..add(other);
@pragma('vm:prefer-inline')
void add(Vector2 arg) {
final argStorage = arg._v2storage;
_v2storage[0] = _v2storage[0] + argStorage[0];
_v2storage[1] = _v2storage[1] + argStorage[1];
}
@pragma('vm:prefer-inline')
double get x => _v2storage[0];
@pragma('vm:prefer-inline')
double get y => _v2storage[1];
}
@pragma('vm:never-inline')
String foo(double x, num doDeopt) {
// All allocations in this function are eliminated by the compiler,
// except array allocation for string interpolation at the end.
List v1 = List.filled(2, null);
v1[0] = 1;
v1[1] = 'hi';
Vector2 v2 = new Vector2(1.0, 2.0);
Vector2 v3 = v2 + Vector2(x, x);
double sum = v3.x + v3.y;
Float32List v4 = Float32List(2);
v4[0] = 11.0;
v4[1] = sum + 3;
print(v4[0]);
// Deoptimization is triggered here to materialize removed allocations.
doDeopt + 2;
return "v1: [${v1[0]},${v1[1]}], v2: [${v2.x},${v2.y}], v3: [${v3.x},${v3.y}], v4: [${v4[0]}, ${v4[1]}], sum: $sum";
}
main() {
// Due to '--optimization-counter-threshold=100 --deterministic'
// foo() is optimized during the first 100 iterations.
// After that, on iteration 120 deoptimization is triggered by changed
// type of 'doDeopt'. That forces materialization of all objects which
// allocations were removed by optimizer.
for (int i = 0; i < 130; ++i) {
final num doDeopt = (i < 120 ? 1 : 2.0);
final result = foo(3.0, doDeopt);
Expect.equals(
"v1: [1,hi], v2: [1.0,2.0], v3: [4.0,5.0], v4: [11.0, 12.0], sum: 9.0",
result);
}
}