fschneider@google.com
85a2dca687
Introduce a new IL instruction that does charCodeAt from 1- and 2-byte character strings. The existing CheckArrayBound instructions is extended to be used for string bounds checking. Also fix a bug with a missing compile-time bounds-check on constant arrays. TEST=tests/language/optimized_string_charcodeat.dart, tests/language/optimized_constant_array_string_access.dart Review URL: https://codereview.chromium.org//11360033 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@14441 260f80e4-7a28-3924-810f-c04153c831b5
50 lines
1.1 KiB
Dart
50 lines
1.1 KiB
Dart
// Copyright (c) 2012, 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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// Test optimized constant string and constant array access.
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int testConstantStringAndIndexCharCodeAt() {
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int test(b) {
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if (b) return "hest".charCodeAt(400);
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return "hest".charCodeAt(2);
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}
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Expect.throws(() => test(true));
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for (int i = 0; i < 10000; i++) test(false);
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Expect.throws(() => test(true));
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}
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int testConstantArrayAndIndexAt() {
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int test(b) {
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var a = const [1,2,3,4];
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if (b) return a[400];
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return a[2];
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}
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Expect.throws(() => test(true));
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for (int i = 0; i < 10000; i++) test(false);
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Expect.throws(() => test(true));
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}
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foo(a) {
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if (a == 1) { return 2; }
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var aa = const [1, 2];
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return aa[2.3];
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}
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int testNonSmiIndex() {
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for (int i = 0; i < 10000; i++) { foo(1); }
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Expect.throws(() => foo(2));
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}
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main() {
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testConstantStringAndIndexCharCodeAt();
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testConstantArrayAndIndexAt();
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testNonSmiIndex();
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}
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