e43fbde72b
The original peephole optimizer logic in the BytecodeArrayBuilder did not respect source positions as it was written before there were bytecode source positions. This led to some minor differences to FCG and was problematic when combined with pending bytecode optimizations. This change makes the new peephole optimizer fully respect source positions. BUG=v8:4280 LOG=N Review-Url: https://codereview.chromium.org/1998203002 Cr-Commit-Position: refs/heads/master@{#36439}
38 lines
1.1 KiB
JavaScript
38 lines
1.1 KiB
JavaScript
// Copyright 2016 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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// Flags: --expose-debug-as debug
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Debug = debug.Debug
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var exception = null;
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var break_count = 0;
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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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print(event_data.sourceLineText());
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var column = event_data.sourceColumn();
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assertTrue(event_data.sourceLineText().indexOf(
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`Break ${break_count++}. ${column}.`) > 0);
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exec_state.prepareStep(Debug.StepAction.StepIn);
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} catch (e) {
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print(e + e.stack);
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exception = e;
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}
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};
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function f() {
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var a = 1; // Break 2. 10.
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return a; // Break 3. 2.
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} // Break 4. 0.
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Debug.setListener(listener);
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debugger; // Break 0. 0.
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f(); // Break 1. 0.
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Debug.setListener(null); // Break 5. 0.
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assertNull(exception);
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assertEquals(6, break_count);
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