Add external strings support to regexp in generated code.

test/mjsunit/string-external-cached.js

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 // Flags: --expose-externalize-string --expose-gc
-
-var size = 1024;
+// Test data pointer caching of external strings.
 
 function test() {
-  var str = "";
-
-  // Build an ascii cons string.
-  for (var i = 0; i < size; i++) {
-      str += String.fromCharCode(i & 0x7f);
-  }
-  assertTrue(isAsciiString(str));
-
-  var twoByteExternalWithAsciiData =
-      "AA" + (function() { return "A"; })();
-  externalizeString(twoByteExternalWithAsciiData, true /* force two-byte */);
-  assertFalse(isAsciiString(twoByteExternalWithAsciiData));
-
-  var realTwoByteExternalString =
-      "\u1234\u1234\u1234\u1234" + (function() { return "\u1234"; })();
-  externalizeString(realTwoByteExternalString);
-  assertFalse(isAsciiString(realTwoByteExternalString));
-
-  assertTrue(isAsciiString(["a", twoByteExternalWithAsciiData].join("")));
-
-  // Appending a two-byte string that contains only ascii chars should
-  // still produce an ascii cons.
-  var str1 = str + twoByteExternalWithAsciiData;
-  assertTrue(isAsciiString(str1));
-
-  // Force flattening of the string.
-  var old_length = str1.length - twoByteExternalWithAsciiData.length;
-  for (var i = 0; i < old_length; i++) {
-    assertEquals(String.fromCharCode(i & 0x7f), str1[i]);
-  }
-  for (var i = old_length; i < str1.length; i++) {
-    assertEquals("A", str1[i]);
-  }
-
-  // Flattened string should still be ascii.
-  assertTrue(isAsciiString(str1));
-
-  // Lower-casing an ascii string should produce ascii.
-  assertTrue(isAsciiString(str1.toLowerCase()));
-
-  assertFalse(isAsciiString(["a", realTwoByteExternalString].join("")));
-
-  // Appending a real two-byte string should produce a two-byte cons.
-  var str2 = str + realTwoByteExternalString;
-  assertFalse(isAsciiString(str2));
-
-  // Force flattening of the string.
-  old_length = str2.length - realTwoByteExternalString.length;
-  for (var i = 0; i < old_length; i++) {
-    assertEquals(String.fromCharCode(i & 0x7f), str2[i]);
-  }
-  for (var i = old_length; i < str.length; i++) {
-    assertEquals("\u1234", str2[i]);
-  }
-
-  // Flattened string should still be two-byte.
-  assertFalse(isAsciiString(str2));
-
-  // Test buffered external strings.
+  // Test string.charAt.
   var charat_str = new Array(5);
   charat_str[0] = "0123456789ABCDEF0123456789ABCDEF\
 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF\
 0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF";
   charat_str[1] = "0123456789ABCDEF";
   for (var i = 0; i < 6; i++) charat_str[1] += charat_str[1];
   try {  // String can only be externalized once
     externalizeString(charat_str[0], false);
     externalizeString(charat_str[1], true);
   } catch (ex) { }
   charat_str[2] = charat_str[0].slice(0, -1);
   charat_str[3] = charat_str[1].slice(0, -1);
   charat_str[4] = charat_str[0] + charat_str[0];
 
   for (var i = 0; i < 5; i++) {
     assertEquals('B', charat_str[i].charAt(6*16 + 11));
     assertEquals('C', charat_str[i].charAt(6*16 + 12));
     assertEquals('A', charat_str[i].charAt(3*16 + 10));
     assertEquals('B', charat_str[i].charAt(3*16 + 11));
   }
 
   charat_short = "012";
   try {  // String can only be externalized once
     externalizeString(charat_short, true);
   } catch (ex) { }
   assertEquals("1", charat_short.charAt(1));
+
+  // Test regexp.
+  var re = /(A|B)/;
+  var rere = /(T.{1,2}B)/;
+  var ascii = "ABCDEFGHIJKLMNOPQRST";
+  var twobyte = "_ABCDEFGHIJKLMNOPQRST";
+  try {
+    externalizeString(ascii, false);
+    externalizeString(twobyte, true);
+  } catch (ex) { }
+  assertTrue(isAsciiString(ascii));
+  assertFalse(isAsciiString(twobyte));
+  var ascii_slice = ascii.slice(1,-1);
+  var twobyte_slice = twobyte.slice(2,-1);
+  var ascii_cons = ascii + ascii;
+  var twobyte_cons = twobyte + twobyte;
+  for (var i = 0; i < 2; i++) {
+    assertEquals(["A", "A"], re.exec(ascii));
+    assertEquals(["B", "B"], re.exec(ascii_slice));
+    assertEquals(["TAB", "TAB"], rere.exec(ascii_cons));
+    assertEquals(["A", "A"], re.exec(twobyte));
+    assertEquals(["B", "B"], re.exec(twobyte_slice));
+    assertEquals(["T_AB", "T_AB"], rere.exec(twobyte_cons));
+  }
 }
 
 // Run the test many times to ensure IC-s don't break things.
 for (var i = 0; i < 10; i++) {
   test();
 }
 
 // Clean up string to make Valgrind happy.
 gc();
 gc();