- Remove JSCRE from the runtime.

runtime/vm/intrinsifier_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_X64.
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/intrinsifier.h"
 
 #include "vm/assembler.h"
@@ skipping 1896 matching lines @@
   StringEquality(assembler, kOneByteStringCid);
 }
 
 
 void Intrinsifier::TwoByteString_equality(Assembler* assembler) {
   StringEquality(assembler, kTwoByteStringCid);
 }
 
 
 void Intrinsifier::JSRegExp_ExecuteMatch(Assembler* assembler) {
-  if (FLAG_use_jscre) {
-    return;
-  }
   static const intptr_t kRegExpParamOffset = 3 * kWordSize;
   static const intptr_t kStringParamOffset = 2 * kWordSize;
   // start_index smi is located at offset 1.
 
   // Incoming registers:
   // RAX: Function. (Will be loaded with the specialized matcher function.)
   // RCX: Unknown. (Must be GC safe on tail call.)
   // R10: Arguments descriptor. (Will be preserved.)
 
   // Load the specialized function pointer into RAX. Leverage the fact the
@@ skipping 61 matching lines @@
   // Set return value to Isolate::current_tag_.
   __ movq(RAX, Address(RBX, Isolate::current_tag_offset()));
   __ ret();
 }
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64