06f05ec231
- Enable aggressive lazy inner funcs (make non-declaration funcs lazy, ie let f =
function() { ... } when --experimental-preparser-scope-analysis is on.
- Turn on variable tracking for lazy top level functions: this makes their inner
functions skippable.
- Test fix for an testing bug uncovered by this work: when restoring the data
for the relevant scope, don't assume it's the outermost scope for which we
have data.
- Fix: if we abort lazy parsing a function, we shouldn't produce any data for
it.
BUG=v8:5516
Change-Id: I0606fbabb5886dc57dbb53ab5f3fb894ff5d032e
Reviewed-on: https://chromium-review.googlesource.com/518165
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#45615}
96 lines
2.4 KiB
JavaScript
96 lines
2.4 KiB
JavaScript
// Copyright 2017 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: --experimental-preparser-scope-analysis
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(function TestBasicSkipping() {
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var result = 0;
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function lazy(ctxt_alloc_param) {
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var ctxt_alloc_var = 10;
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function skip_me() {
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result = ctxt_alloc_param + ctxt_alloc_var;
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}
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return skip_me;
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}
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// Test that parameters and variables of the outer function get context
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// allocated even if we skip the inner function.
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lazy(9)();
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assertEquals(19, result);
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})();
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(function TestSkippingFunctionWithEval() {
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var result = 0;
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function lazy(ctxt_alloc_param) {
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var ctxt_alloc_var = 10;
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function skip_me() {
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eval('result = ctxt_alloc_param + ctxt_alloc_var');
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}
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return skip_me;
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}
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// Test that parameters and variables of the outer function get context
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// allocated even if we skip the inner function.
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lazy(9)();
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assertEquals(19, result);
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})();
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(function TestCtxtAllocatingNonSimpleParams1() {
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var result = 0;
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function lazy([other_param1, ctxt_alloc_param, other_param2]) {
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function skip_me() {
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result = ctxt_alloc_param;
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}
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return skip_me;
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}
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// Test that parameters and variables of the outer function get context
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// allocated even if we skip the inner function.
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lazy([30, 29, 28])();
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assertEquals(29, result);
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})();
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(function TestCtxtAllocatingNonSimpleParams2() {
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var result = 0;
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function lazy({a: other_param1, b: ctxt_alloc_param, c: other_param2}) {
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function skip_me() {
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result = ctxt_alloc_param;
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}
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return skip_me;
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}
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// Test that parameters and variables of the outer function get context
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// allocated even if we skip the inner function.
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lazy({a: 31, b: 32, c: 33})();
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assertEquals(32, result);
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})();
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(function TestCtxtAllocatingNonSimpleParams3() {
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var result = 0;
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function lazy(...ctxt_alloc_param) {
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function skip_me() {
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result = ctxt_alloc_param;
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}
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return skip_me;
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}
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// Test that parameters and variables of the outer function get context
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// allocated even if we skip the inner function.
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lazy(34, 35)();
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assertEquals([34, 35], result);
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})();
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// Skippable top level functions.
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let result = 0;
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function lazy_top_level(ctxt_alloc_param) {
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let ctxt_alloc_var = 24;
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function skip_me() {
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result = ctxt_alloc_param + ctxt_alloc_var;
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}
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skip_me();
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}
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lazy_top_level(10);
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assertEquals(34, result);
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