Robert Nystrom
d4154ac6dc
Change-Id: Iad2963c7f9c184b089dc6d15aa4442f58d194bc2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/151983 Reviewed-by: Nicholas Shahan <nshahan@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
91 lines
2.4 KiB
Dart
91 lines
2.4 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Dart test program to test cid guessing optimizations.
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// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
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import "package:expect/expect.dart";
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main() {
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// Warmup optimizes methods.
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for (int i = 0; i < 100; i++) {
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Expect.equals(i, compareInt(i));
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Expect.equals(i.toDouble(), compareDouble(i.toDouble()));
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Expect.equals(i, binOpInt(i, i));
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Expect.equals(i.toDouble(), binOpDouble(i.toDouble(), i.toDouble()));
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}
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Expect.equals(3, compareInt(3));
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Expect.equals(-2, compareInt(-2));
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Expect.equals(0, compareInt(-1));
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Expect.equals(3, binOpInt(3, 3));
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Expect.equals(0, binOpInt(-2, -2));
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Expect.equals(3.0, binOpDouble(3.0, 3.0));
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Expect.equals(0.0, binOpDouble(-2.0, -2.0));
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Expect.equals(3.0, compareDouble(3.0));
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Expect.equals(-2.0, compareDouble(-2.0));
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Expect.equals(0.0, compareDouble(-1.0));
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testOSR();
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}
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int compareInt(int i) {
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if (i < 0) {
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// Not visited in before optimization.
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// Guess cid of comparison below.
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if (i == -1) return 0;
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}
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return i;
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}
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double compareDouble(double i) {
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if (i < 0.0) {
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// Not visited in before optimization.
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// Guess cid of comparison below.
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if (i == -1.0) return 0.0;
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}
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return i;
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}
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int binOpInt(int i, int x) {
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if (i < 0) {
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// Not visited in before optimization.
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// Guess cid of binary operation below.
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return x + 2;
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}
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return i;
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}
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double binOpDouble(double i, double x) {
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if (i < 0.0) {
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// Not visited in before optimization.
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// Guess cid of binary operation below.
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return x + 2.0;
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}
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return i;
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}
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testOSR() {
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// Foul up IC data in integer's unary minus.
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var y = -0x80000000;
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Expect.equals(
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(0x7fffffffffffffff + 2) * 10, testLoop(10, 0x7fffffffffffffff));
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// Second time no deoptimization can occur, since runtime feedback has been collected.
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Expect.equals(
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(0x7fffffffffffffff + 2) * 10, testLoop(10, 0x7fffffffffffffff));
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}
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testLoop(N, int x) {
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for (int i = 0; i < N; ++i) {
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// Will trigger OSR. Operation in loop below will use guessed cids.
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}
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int sum = 0;
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for (int i = 0; i < N; ++i) {
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// Guess 'x' is Smi, but is actually Mint: deoptimize.
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sum += x + 2;
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}
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return sum;
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}
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