Cache lookups at megamorphic call sites in optimized code.

runtime/vm/intermediate_language_x64.cc

 // Copyright (c) 2012, 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/intermediate_language.h"
 
 #include "lib/error.h"
@@ skipping 345 matching lines @@
   }
   const String& operator_name = String::ZoneHandle(Symbols::EqualOperator());
   const int kNumberOfArguments = 2;
   const Array& kNoArgumentNames = Array::Handle();
   const int kNumArgumentsChecked = 2;
 
   const Immediate raw_null =
       Immediate(reinterpret_cast<intptr_t>(Object::null()));
   Label check_identity;
   __ cmpq(Address(RSP, 0 * kWordSize), raw_null);
-  __ j(EQUAL, &check_identity, Assembler::kNearJump);
+  __ j(EQUAL, &check_identity);
   __ cmpq(Address(RSP, 1 * kWordSize), raw_null);
-  __ j(EQUAL, &check_identity, Assembler::kNearJump);
+  __ j(EQUAL, &check_identity);
 
   ICData& equality_ic_data = ICData::ZoneHandle(original_ic_data.raw());
   if (compiler->is_optimizing() && FLAG_propagate_ic_data) {
     ASSERT(!original_ic_data.IsNull());
     if (original_ic_data.NumberOfChecks() == 0) {
       // IC call for reoptimization populates original ICData.
       equality_ic_data = original_ic_data.raw();
     } else {
       // Megamorphic call.
       equality_ic_data = original_ic_data.AsUnaryClassChecks();
@@ skipping 2055 matching lines @@
 
 void ShiftMintOpInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   UNIMPLEMENTED();
 }
 
 }  // namespace dart
 
 #undef __
 
 #endif  // defined TARGET_ARCH_X64