Revert of Extend big-disjunction optimization to case-independent regexps

test/mjsunit/regexp-sort.js

-// Copyright 2015 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-function Test(lower, upper) {
-  var lx = lower + "x";
-  var ux = upper + "x";
-  var lp = lower + "|";
-  var uxp = upper + "x|";
-  assertEquals(lx, new RegExp(uxp + lp + lower + "cat", "i").exec(lx) + "");
-  assertEquals(ux, new RegExp(uxp + lp + lower + "cat", "i").exec(ux) + "");
-  assertEquals(lower, new RegExp(lp + uxp + lower + "cat", "i").exec(lx) + "");
-  assertEquals(upper, new RegExp(lp + uxp + lower + "cat", "i").exec(ux) + "");
-}
-
-function TestFail(lower, upper) {
-  var lx = lower + "x";
-  var ux = upper + "x";
-  var lp = lower + "|";
-  var uxp = upper + "x|";
-  assertEquals(lower, new RegExp(uxp + lp + lower + "cat", "i").exec(lx) + "");
-  assertEquals(ux, new RegExp(uxp + lp + lower + "cat", "i").exec(ux) + "");
-  assertEquals(lower, new RegExp(lp + uxp + lower + "cat", "i").exec(lx) + "");
-  assertEquals(ux, new RegExp(lp + uxp + lower + "cat", "i").exec(ux) + "");
-}
-
-Test("a", "A");
-Test("0", "0");
-TestFail("a", "b");
-// Small and capital o-umlaut
-Test(String.fromCharCode(0xf6), String.fromCharCode(0xd6));
-// Small and capital kha.
-Test(String.fromCharCode(0x445), String.fromCharCode(0x425));
-// Small and capital y-umlaut.
-Test(String.fromCharCode(0xff), String.fromCharCode(0x178));
-// Small and large Greek mu.
-Test(String.fromCharCode(0x3bc), String.fromCharCode(0x39c));
-// Micron and large Greek mu.
-Test(String.fromCharCode(0xb5), String.fromCharCode(0x39c));
-// Micron and small Greek mu.
-Test(String.fromCharCode(0xb5), String.fromCharCode(0x3bc));
-// German double s and capital S. These are not equivalent since one is double.
-TestFail(String.fromCharCode(0xdf), "S");
-// Small i and Turkish capital dotted I. These are not equivalent due to
-// 21.2.2.8.2 section 3g.  One is below 128 and the other is above 127.
-TestFail("i", String.fromCharCode(0x130));
-// Small dotless i and I. These are not equivalent either.
-TestFail(String.fromCharCode(0x131), "I");