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c959c9aba7
Change-Id: I3f67dd79ff2ee745cc2ea161ce7150630e805c97 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/150186 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com>
45 lines
1.1 KiB
Dart
45 lines
1.1 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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// Regression test for dart2js that used to crash during the
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// [SsaCodeMotion] phase on this code.
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class A {
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final finalField;
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var field = 2;
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foo() {
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new A().field = 42;
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}
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A._() : finalField = 42;
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A() : finalField = [new A._(), new B(), new Object()][1];
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}
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class B {
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foo() {}
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bar() {}
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}
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main() {
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var a = new A();
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// Create a new block for SsaCodeMotion: the phase will want to move
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// field access on [a] to this block.
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if (true) {
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var b = a.finalField;
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var d = a.field;
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b.bar();
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// [c] gets GVN'ed with [b]. As a consequence, the type propagator
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// that runs after GVN sees that [c] can only be a [B] because of
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// the call to [bar].
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var c = a.finalField;
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c.foo();
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// [e] does not get GVN'ed because the GVN phase sees [c.foo()] as
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// having side effects.
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var e = a.field;
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if (d + e != 4) throw 'Test failed';
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}
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}
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