Remove always-true --harmony-string-matchall runtime flag

It shipped in Chrome 73.

Bug: v8:6890
Change-Id: Idd8c98cf05a0d6e8fa58c5b0a34d079631f68b1b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1582879Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Cr-Commit-Position: refs/heads/master@{#61005}

src/bootstrapper.cc

@@ -1990,6 +1990,8 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
 #endif  // V8_INTL_SUPPORT
     SimpleInstallFunction(isolate_, prototype, "match",
                           Builtins::kStringPrototypeMatch, 1, true);
+    SimpleInstallFunction(isolate_, prototype, "matchAll",
+                          Builtins::kStringPrototypeMatchAll, 1, true);
 #ifdef V8_INTL_SUPPORT
     SimpleInstallFunction(isolate_, prototype, "normalize",
                           Builtins::kStringPrototypeNormalizeIntl, 0, false);
@@ -2118,6 +2120,8 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
     InstallConstant(isolate_, symbol_fun, "iterator",
                     factory->iterator_symbol());
     InstallConstant(isolate_, symbol_fun, "match", factory->match_symbol());
+    InstallConstant(isolate_, symbol_fun, "matchAll",
+                    factory->match_all_symbol());
     InstallConstant(isolate_, symbol_fun, "replace", factory->replace_symbol());
     InstallConstant(isolate_, symbol_fun, "search", factory->search_symbol());
     InstallConstant(isolate_, symbol_fun, "species", factory->species_symbol());
@@ -2486,6 +2490,12 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
       DCHECK_EQ(JSRegExp::kSymbolMatchFunctionDescriptorIndex,
                 prototype->map()->LastAdded());
 
+      InstallFunctionAtSymbol(isolate_, prototype, factory->match_all_symbol(),
+                              "[Symbol.matchAll]",
+                              Builtins::kRegExpPrototypeMatchAll, 1, true);
+      DCHECK_EQ(JSRegExp::kSymbolMatchAllFunctionDescriptorIndex,
+                prototype->map()->LastAdded());
+
       InstallFunctionAtSymbol(isolate_, prototype, factory->replace_symbol(),
                               "[Symbol.replace]",
                               Builtins::kRegExpPrototypeReplace, 2, false);
@@ -2599,6 +2609,31 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
     JSObject::MigrateSlowToFast(regexp_fun, 0, "Bootstrapping");
   }
 
+  {  // --- R e g E x p S t r i n g  I t e r a t o r ---
+    Handle<JSObject> iterator_prototype(
+        native_context()->initial_iterator_prototype(), isolate());
+
+    Handle<JSObject> regexp_string_iterator_prototype = factory->NewJSObject(
+        isolate()->object_function(), AllocationType::kOld);
+    JSObject::ForceSetPrototype(regexp_string_iterator_prototype,
+                                iterator_prototype);
+
+    InstallToStringTag(isolate(), regexp_string_iterator_prototype,
+                       "RegExp String Iterator");
+
+    SimpleInstallFunction(isolate(), regexp_string_iterator_prototype, "next",
+                          Builtins::kRegExpStringIteratorPrototypeNext, 0,
+                          true);
+
+    Handle<JSFunction> regexp_string_iterator_function = CreateFunction(
+        isolate(), "RegExpStringIterator", JS_REGEXP_STRING_ITERATOR_TYPE,
+        JSRegExpStringIterator::kSize, 0, regexp_string_iterator_prototype,
+        Builtins::kIllegal);
+    regexp_string_iterator_function->shared()->set_native(false);
+    native_context()->set_initial_regexp_string_iterator_prototype_map(
+        regexp_string_iterator_function->initial_map());
+  }
+
   {  // -- E r r o r
     InstallError(isolate_, global, factory->Error_string(),
                  Context::ERROR_FUNCTION_INDEX);
@@ -4193,68 +4228,6 @@ void Genesis::InitializeGlobal_harmony_sharedarraybuffer() {
   InstallToStringTag(isolate_, isolate()->atomics_object(), "Atomics");
 }
 
-void Genesis::InitializeGlobal_harmony_string_matchall() {
-  if (!FLAG_harmony_string_matchall) return;
-
-  {  // String.prototype.matchAll
-    Handle<JSFunction> string_fun(native_context()->string_function(),
-                                  isolate());
-    Handle<JSObject> string_prototype(
-        JSObject::cast(string_fun->instance_prototype()), isolate());
-
-    SimpleInstallFunction(isolate(), string_prototype, "matchAll",
-                          Builtins::kStringPrototypeMatchAll, 1, true);
-  }
-
-  {  // RegExp.prototype[@@matchAll]
-    Handle<JSFunction> regexp_fun(native_context()->regexp_function(),
-                                  isolate());
-    Handle<JSObject> regexp_prototype(
-        JSObject::cast(regexp_fun->instance_prototype()), isolate());
-    InstallFunctionAtSymbol(isolate(), regexp_prototype,
-                            factory()->match_all_symbol(), "[Symbol.matchAll]",
-                            Builtins::kRegExpPrototypeMatchAll, 1, true);
-    DCHECK_EQ(JSRegExp::kSymbolMatchAllFunctionDescriptorIndex,
-              regexp_prototype->map()->LastAdded());
-
-    Handle<Map> regexp_prototype_map(regexp_prototype->map(), isolate());
-    Map::SetShouldBeFastPrototypeMap(regexp_prototype_map, true, isolate());
-    native_context()->set_regexp_prototype_map(*regexp_prototype_map);
-  }
-
-  {  // --- R e g E x p S t r i n g  I t e r a t o r ---
-    Handle<JSObject> iterator_prototype(
-        native_context()->initial_iterator_prototype(), isolate());
-
-    Handle<JSObject> regexp_string_iterator_prototype = factory()->NewJSObject(
-        isolate()->object_function(), AllocationType::kOld);
-    JSObject::ForceSetPrototype(regexp_string_iterator_prototype,
-                                iterator_prototype);
-
-    InstallToStringTag(isolate(), regexp_string_iterator_prototype,
-                       "RegExp String Iterator");
-
-    SimpleInstallFunction(isolate(), regexp_string_iterator_prototype, "next",
-                          Builtins::kRegExpStringIteratorPrototypeNext, 0,
-                          true);
-
-    Handle<JSFunction> regexp_string_iterator_function = CreateFunction(
-        isolate(), "RegExpStringIterator", JS_REGEXP_STRING_ITERATOR_TYPE,
-        JSRegExpStringIterator::kSize, 0, regexp_string_iterator_prototype,
-        Builtins::kIllegal);
-    regexp_string_iterator_function->shared()->set_native(false);
-    native_context()->set_initial_regexp_string_iterator_prototype_map(
-        regexp_string_iterator_function->initial_map());
-  }
-
-  {  // @@matchAll Symbol
-    Handle<JSFunction> symbol_fun(native_context()->symbol_function(),
-                                  isolate());
-    InstallConstant(isolate(), symbol_fun, "matchAll",
-                    factory()->match_all_symbol());
-  }
-}
-
 void Genesis::InitializeGlobal_harmony_weak_refs() {
   if (!FLAG_harmony_weak_refs) return;
 

src/flag-definitions.h

@@ -249,7 +249,6 @@ DEFINE_IMPLICATION(harmony_private_methods, harmony_private_fields)
   V(harmony_global, "harmony global")                                          \
   V(harmony_public_fields, "harmony public instance fields in class literals") \
   V(harmony_static_fields, "harmony static fields in class literals")          \
-  V(harmony_string_matchall, "harmony String.prototype.matchAll")              \
   V(harmony_object_from_entries, "harmony Object.fromEntries()")               \
   V(harmony_await_optimization, "harmony await taking 1 tick")                 \
   V(harmony_private_fields, "harmony private fields in class literals")        \

src/objects/js-regexp.h

@@ -167,10 +167,10 @@ class JSRegExp : public JSObject {
   // Descriptor array index to important methods in the prototype.
   static const int kExecFunctionDescriptorIndex = 1;
   static const int kSymbolMatchFunctionDescriptorIndex = 13;
-  static const int kSymbolReplaceFunctionDescriptorIndex = 14;
-  static const int kSymbolSearchFunctionDescriptorIndex = 15;
-  static const int kSymbolSplitFunctionDescriptorIndex = 16;
-  static const int kSymbolMatchAllFunctionDescriptorIndex = 17;
+  static const int kSymbolMatchAllFunctionDescriptorIndex = 14;
+  static const int kSymbolReplaceFunctionDescriptorIndex = 15;
+  static const int kSymbolSearchFunctionDescriptorIndex = 16;
+  static const int kSymbolSplitFunctionDescriptorIndex = 17;
 
   // The uninitialized value for a regexp code object.
   static const int kUninitializedValue = -1;

test/js-perf-test/JSTests3.json

@@ -160,9 +160,6 @@
           "name": "StringMatchAll",
           "main": "run.js",
           "resources": [ "string-matchall.js" ],
-          "flags": [
-            "--harmony-string-matchall"
-          ],
           "test_flags": [ "string-matchall" ],
           "results_regexp": "^%s\\-Strings\\(Score\\): (.+)$",
           "run_count": 1,

test/mjsunit/harmony/string-matchAll-deleted-matchAll.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-string-matchall
-
 delete RegExp.prototype[Symbol.matchAll];
 const str = 'a';
 assertThrows(() => str.matchAll(/\w/g), TypeError);

test/mjsunit/harmony/string-matchAll.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-string-matchall
-
 (function TestReceiverNonString() {
   const iter = 'a'.matchAll(/./);
   assertThrows(

test/mjsunit/regexp-override-symbol-match-all.js

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-string-matchall
-
 var s = "baa";
 
 assertEquals([["b"]], [...s.matchAll(/./)]);

test/mjsunit/regress-v8-8445-2.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --allow-natives-syntax --harmony-string-matchall
+// Flags: --allow-natives-syntax
 
 class MyRegExp {
   exec() { return null; }

test/mjsunit/regress-v8-8445.js

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --allow-natives-syntax --harmony-string-matchall
+// Flags: --allow-natives-syntax
 
 class MyRegExp {
   exec() { return null; }

test/mjsunit/regress/regress-crbug-899464.js

@@ -2,6 +2,4 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-string-matchall
-
 ''.matchAll(/./u);

test/test262/testcfg.py

@@ -48,8 +48,6 @@ FEATURE_FLAGS = {
   'class-static-fields-public': '--harmony-class-fields',
   'class-fields-private': '--harmony-private-fields',
   'class-static-fields-private': '--harmony-private-fields',
-  'String.prototype.matchAll': '--harmony-string-matchall',
-  'Symbol.matchAll': '--harmony-string-matchall',
   'numeric-separator-literal': '--harmony-numeric-separator',
   'Intl.DateTimeFormat-datetimestyle': '--harmony-intl-datetime-style',
   'Intl.Locale': '--harmony-locale',