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
52 lines
1.2 KiB
Dart
52 lines
1.2 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 charCodeAt and array access.
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String one_byte = "hest";
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String two_byte = "høns";
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int testOneByteCharCodeAt(String x, int i) {
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int test() {
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return x.charCodeAt(i);
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}
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for (int i = 0; i < 10000; i++) test();
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return test();
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}
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int testTwoByteCharCodeAt(String x, int i) {
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int test() {
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return x.charCodeAt(i);
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}
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for (int i = 0; i < 10000; i++) test();
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return test();
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}
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int testConstantStringCharCodeAt(int i) {
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int test() {
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return "høns".charCodeAt(i);
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}
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for (int i = 0; i < 10000; i++) test();
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return test();
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}
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int testConstantIndexCharCodeAt(String x) {
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int test() {
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return x.charCodeAt(1);
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}
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for (int i = 0; i < 10000; i++) test();
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return test();
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}
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main() {
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Expect.equals(101, testOneByteCharCodeAt(one_byte, 1));
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Expect.equals(248, testTwoByteCharCodeAt(two_byte, 1));
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Expect.equals(248, testConstantStringCharCodeAt(1));
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Expect.equals(101, testConstantIndexCharCodeAt(one_byte));
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}
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