Revert of [regexp] extend property classes by script category. (patchset #1 id:1 of https://codereview.chromium.org/1774513002/ )

Reason for revert:
wrong noi18n expectations

Original issue's description:
> [regexp] extend property classes by script category.
>
> R=littledan@chromium.org
> BUG=v8:4743
> LOG=N
>
> Committed: https://crrev.com/22f6735ccbe2e341d341e61b9c38ce308b8da655
> Cr-Commit-Position: refs/heads/master@{#34553}

TBR=littledan@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4743

Review URL: https://codereview.chromium.org/1772563003

Cr-Commit-Position: refs/heads/master@{#34554}

src/char-predicates-inl.h

@@ -43,10 +43,6 @@ inline bool IsAlphaNumeric(uc32 c) {
   return IsInRange(AsciiAlphaToLower(c), 'a', 'z') || IsDecimalDigit(c);
 }
 
-inline bool IsAlpha(uc32 c) {
-  return IsInRange(AsciiAlphaToLower(c), 'a', 'z');
-}
-
 inline bool IsDecimalDigit(uc32 c) {
   // ECMA-262, 3rd, 7.8.3 (p 16)
   return IsInRange(c, '0', '9');

src/char-predicates.h

@@ -18,7 +18,6 @@ inline bool IsCarriageReturn(uc32 c);
 inline bool IsLineFeed(uc32 c);
 inline bool IsAsciiIdentifier(uc32 c);
 inline bool IsAlphaNumeric(uc32 c);
-inline bool IsAlpha(uc32 c);
 inline bool IsDecimalDigit(uc32 c);
 inline bool IsHexDigit(uc32 c);
 inline bool IsOctalDigit(uc32 c);

src/regexp/regexp-parser.cc

@@ -838,59 +838,52 @@ bool RegExpParser::ParseUnicodeEscape(uc32* value) {
 
 ZoneList<CharacterRange>* RegExpParser::ParsePropertyClass() {
 #ifdef V8_I18N_SUPPORT
-  ZoneList<char> property_name(0, zone());
+  char property_name[3];
+  memset(property_name, 0, sizeof(property_name));
   if (current() == '{') {
-    for (Advance(); IsAlpha(current()); Advance()) {
-      property_name.Add(static_cast<char>(current()), zone());
+    Advance();
+    if (current() < 'A' || current() > 'Z') return nullptr;
+    property_name[0] = static_cast<char>(current());
+    Advance();
+    if (current() >= 'a' && current() <= 'z') {
+      property_name[1] = static_cast<char>(current());
+      Advance();
     }
     if (current() != '}') return nullptr;
-  } else if (IsAlpha(current())) {
-    property_name.Add(static_cast<char>(current()), zone());
+  } else if (current() >= 'A' && current() <= 'Z') {
+    property_name[0] = static_cast<char>(current());
   } else {
     return nullptr;
   }
   Advance();
-  property_name.Add(0, zone());  // null-terminate string.
 
-  // Property names are defined in unicode database files. For aliases of
-  // these property names, see PropertyValueAliases.txt.
-  UProperty kPropertyClasses[] = {
-      // General_Category (gc) found in PropertyValueAliases.txt
-      UCHAR_GENERAL_CATEGORY_MASK,
-      // Script (sc) found in Scripts.txt
-      UCHAR_SCRIPT,
-  };
+  int32_t category =
+      u_getPropertyValueEnum(UCHAR_GENERAL_CATEGORY_MASK, property_name);
+  if (category == UCHAR_INVALID_CODE) return nullptr;
 
-  for (int i = 0; i < arraysize(kPropertyClasses); i++) {
-    UProperty property_class = kPropertyClasses[i];
-    int32_t category = u_getPropertyValueEnum(
-        property_class, property_name.ToConstVector().start());
-    if (category == UCHAR_INVALID_CODE) continue;
-
-    USet* set = uset_openEmpty();
-    UErrorCode ec = U_ZERO_ERROR;
-    uset_applyIntPropertyValue(set, property_class, category, &ec);
-    ZoneList<CharacterRange>* ranges = nullptr;
-    if (ec == U_ZERO_ERROR && !uset_isEmpty(set)) {
-      uset_removeAllStrings(set);
-      int item_count = uset_getItemCount(set);
-      ranges = new (zone()) ZoneList<CharacterRange>(item_count, zone());
-      int item_result = 0;
-      for (int i = 0; i < item_count; i++) {
-        uc32 start = 0;
-        uc32 end = 0;
-        item_result += uset_getItem(set, i, &start, &end, nullptr, 0, &ec);
-        ranges->Add(CharacterRange::Range(start, end), zone());
-      }
-      DCHECK_EQ(U_ZERO_ERROR, ec);
-      DCHECK_EQ(0, item_result);
+  USet* set = uset_openEmpty();
+  UErrorCode ec = U_ZERO_ERROR;
+  uset_applyIntPropertyValue(set, UCHAR_GENERAL_CATEGORY_MASK, category, &ec);
+  ZoneList<CharacterRange>* ranges = nullptr;
+  if (ec == U_ZERO_ERROR && !uset_isEmpty(set)) {
+    uset_removeAllStrings(set);
+    int item_count = uset_getItemCount(set);
+    ranges = new (zone()) ZoneList<CharacterRange>(item_count, zone());
+    int item_result = 0;
+    for (int i = 0; i < item_count; i++) {
+      uc32 start = 0;
+      uc32 end = 0;
+      item_result += uset_getItem(set, i, &start, &end, nullptr, 0, &ec);
+      ranges->Add(CharacterRange::Range(start, end), zone());
     }
-    uset_close(set);
-    return ranges;
+    DCHECK_EQ(U_ZERO_ERROR, ec);
+    DCHECK_EQ(0, item_result);
   }
-#endif  // V8_I18N_SUPPORT
-
+  uset_close(set);
+  return ranges;
+#else   // V8_I18N_SUPPORT
   return nullptr;
+#endif  // V8_I18N_SUPPORT
 }
 
 bool RegExpParser::ParseUnlimitedLengthHexNumber(int max_value, uc32* value) {

test/mjsunit/harmony/regexp-property-script-category.js

@@ -1,39 +0,0 @@
-// Copyright 2016 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.
-
-// Flags: --harmony-regexp-property
-
-function t(re, s) { assertTrue(re.test(s)); }
-function f(re, s) { assertFalse(re.test(s)); }
-
-t(/\p{Common}+/u, ".");
-f(/\p{Common}+/u, "supercalifragilisticexpialidocious");
-
-t(/\p{Han}+/u, "话说天下大势，分久必合，合久必分");
-t(/\p{Hani}+/u, "吾庄后有一桃园，花开正盛");
-f(/\p{Han}+/u, "おはようございます");
-f(/\p{Hani}+/u, "Something is rotten in the state of Denmark");
-
-t(/\p{Latin}+/u, "Wie froh bin ich, daß ich weg bin!");
-t(/\p{Latn}+/u,
-  "It was a bright day in April, and the clocks were striking thirteen");
-f(/\p{Latin}+/u, "奔腾千里荡尘埃，渡水登山紫雾开");
-f(/\p{Latn}+/u, "いただきます");
-
-t(/\p{Hiragana}/u, "いただきます");
-t(/\p{Hira}/u, "ありがとうございました");
-f(/\p{Hiragana}/u,
-  "Als Gregor Samsa eines Morgens aus unruhigen Träumen erwachte");
-f(/\p{Hira}/u, "Call me Ishmael");
-
-t(/\p{Phoenician}/u, "\u{10900}\u{1091a}");
-t(/\p{Phnx}/u, "\u{1091f}\u{10916}");
-f(/\p{Phoenician}/u, "Arthur est un perroquet");
-f(/\p{Phnx}/u, "设心狠毒非良士，操卓原来一路人");
-
-t(/\p{Grek}/u, "ἄνδρα μοι ἔννεπε, μοῦσα, πολύτροπον, ὃς μάλα πολλὰ");
-t(/\p{Greek}/u, "μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆος");
-f(/\p{Greek}/u, "高贤未服英雄志，屈节偏生杰士疑");
-f(/\p{Greek}/u,
-  "Mr. Jones, of the Manor Farm, had locked the hen-houses for the night");