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>
211 lines
4.9 KiB
Dart
211 lines
4.9 KiB
Dart
// Copyright (c) 2014, 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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import "package:expect/expect.dart";
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confuse(x) {
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if (new DateTime.now().millisecondsSinceEpoch == 0) {
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return confuse(x + 1);
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} else if (new DateTime.now().millisecondsSinceEpoch == 0) {
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return confuse(x - 1);
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}
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return x;
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}
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test1() {
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int x = 0;
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// Give x a range of -1 to 0.
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if (confuse(0) == 1) x = -1;
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int y = 0;
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// Give y a range of 0 to 1.
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if (confuse(0) == 1) y = 1;
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var zero = 0;
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var status = "bad";
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if (x < zero) {
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Expect.fail("unreachable");
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} else {
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// Dart2js must not conclude that zero has a range of [-1, 0].
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if (y <= zero) {
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status = "good";
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}
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}
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Expect.equals("good", status);
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}
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test2() {
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int x = 0;
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// Give x a range of -1 to 0.
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if (confuse(0) == 1) x = -1;
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int y = 0;
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// Give y a range of -1 to 1.
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if (confuse(0) == 1) y = 1;
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if (confuse(1) == 2) y = -1;
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var status = "good";
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if (x < y) {
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Expect.fail("unreachable");
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} else {
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// Dart2js must not conclude that y has a range of [-1, -1].
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if (y == -1) {
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status = "bad";
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}
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}
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Expect.equals("good", status);
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}
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test3a() {
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int x = 0;
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// Give x a range of -1 to 1.
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if (confuse(0) == 1) x = -1;
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if (confuse(1) == 2) x = 1;
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int y = 0;
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// Give y a range of -1 to 1.
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if (confuse(0) == 1) y = 1;
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if (confuse(1) == 2) y = -1;
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var status = "good";
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if (x < y) {
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Expect.fail("unreachable");
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} else {
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// Test that the range-analysis does not lose a value.
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if (x <= -1) status = "bad";
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if (x >= 1) status = "bad";
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if (x < 0) status = "bad";
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if (x > 0) status = "bad";
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if (-1 >= x) status = "bad";
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if (1 <= x) status = "bad";
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if (0 > x) status = "bad";
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if (0 < x) status = "bad";
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if (y <= -1) status = "bad";
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if (y >= 1) status = "bad";
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if (y < 0) status = "bad";
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if (y > 0) status = "bad";
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if (-1 >= y) status = "bad";
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if (1 <= y) status = "bad";
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if (0 > y) status = "bad";
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if (0 < y) status = "bad";
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}
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Expect.equals("good", status);
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}
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test3b() {
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int x = 0;
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// Give x a range of -2 to 0.
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if (confuse(0) == 1) x = -2;
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int y = 0;
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// Give y a range of -1 to 1.
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if (confuse(0) == 1) y = 1;
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if (confuse(1) == 2) y = -1;
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var status = "good";
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if (x < y) {
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Expect.fail("unreachable");
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} else {
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// Test that the range-analysis does not lose a value.
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if (x <= -1) status = "bad";
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if (x >= 1) status = "bad";
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if (x < 0) status = "bad";
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if (x > 0) status = "bad";
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if (-1 >= x) status = "bad";
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if (1 <= x) status = "bad";
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if (0 > x) status = "bad";
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if (0 < x) status = "bad";
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if (y <= -1) status = "bad";
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if (y >= 1) status = "bad";
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if (y < 0) status = "bad";
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if (y > 0) status = "bad";
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if (-1 >= y) status = "bad";
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if (1 <= y) status = "bad";
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if (0 > y) status = "bad";
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if (0 < y) status = "bad";
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}
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Expect.equals("good", status);
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}
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test4a() {
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int x = -1;
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// Give x a range of -1 to 1.
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if (confuse(0) == 1) x = 1;
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int y = 0;
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// Give y a range of -1 to 1.
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if (confuse(0) == 1) y = 1;
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if (confuse(1) == 2) y = -1;
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var status = "good";
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if (x < y) {
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// Test that the range-analysis does not lose a value.
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if (x <= -2) status = "bad";
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if (x >= 0) status = "bad";
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if (x < -1) status = "bad";
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if (x > -1) status = "bad";
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if (-2 >= x) status = "bad";
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if (0 <= x) status = "bad";
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if (-1 > x) status = "bad";
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if (-1 < x) status = "bad";
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if (y <= -1) status = "bad";
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if (y >= 1) status = "bad";
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if (y < 0) status = "bad";
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if (y > 0) status = "bad";
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if (-1 >= y) status = "bad";
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if (1 <= y) status = "bad";
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if (0 > y) status = "bad";
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if (0 < y) status = "bad";
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} else {
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Expect.fail("unreachable");
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}
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Expect.equals("good", status);
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}
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test4b() {
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int x = -1;
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// Give x a range of -2 to 0.
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if (confuse(0) == 1) x = -2;
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if (confuse(1) == 2) x = 0;
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int y = 0;
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// Give y a range of -1 to 1.
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if (confuse(0) == 1) y = 1;
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if (confuse(1) == 2) y = -1;
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var status = "good";
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if (x < y) {
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// Test that the range-analysis does not lose a value.
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if (x <= -2) status = "bad";
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if (x >= 0) status = "bad";
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if (x < -1) status = "bad";
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if (x > -1) status = "bad";
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if (-2 >= x) status = "bad";
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if (0 <= x) status = "bad";
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if (-1 > x) status = "bad";
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if (-1 < x) status = "bad";
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if (y <= -1) status = "bad";
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if (y >= 1) status = "bad";
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if (y < 0) status = "bad";
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if (y > 0) status = "bad";
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if (-1 >= y) status = "bad";
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if (1 <= y) status = "bad";
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if (0 > y) status = "bad";
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if (0 < y) status = "bad";
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} else {
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Expect.fail("unreachable");
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}
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Expect.equals("good", status);
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}
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main() {
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test1();
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test2();
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test3a();
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test3b();
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test4a();
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test4b();
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}
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