2bf71f888f
Replaces the graph-based liveness analyzer in the bytecode graph builder with an initial bytecode-based liveness analysis pass, which is added to the existing loop extent analysis. Now the StateValues in the graph have their inputs initialised to optimized_out, rather than being modified after the graph is built. Review-Url: https://codereview.chromium.org/2523893003 Cr-Commit-Position: refs/heads/master@{#41355}
32 lines
995 B
JavaScript
32 lines
995 B
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// Flags: --noanalyze-environment-liveness
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'use strict';
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var Debug = debug.Debug;
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var exception = null;
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function listener(event, exec_state, event_data, data) {
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if (event != Debug.DebugEvent.Break) return;
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try {
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var scopes = exec_state.frame(0).allScopes();
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assertEquals(debug.ScopeType.Eval, scopes[0].scopeType());
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assertEquals(1, scopes[0].scopeObject().value().a);
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assertEquals(debug.ScopeType.Script, scopes[1].scopeType());
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assertEquals(undefined, scopes[1].scopeObject().value().a);
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assertEquals(debug.ScopeType.Global, scopes[2].scopeType());
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assertEquals(undefined, scopes[2].scopeObject().value().a);
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} catch (e) {
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exception = e;
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}
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}
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Debug.setListener(listener);
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// Eval inherits strict mode.
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eval("var a = 1; debugger;");
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Debug.setListener(null);
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assertNull(exception);
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