In preparation of inlining remainder and modulo binary Smi operations:

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 694 matching lines @@
 
   __ Bind(&subtract);
   __ subq(RAX, RCX);
   __ SmiTag(RAX);
   __ ret();
 
   __ Bind(&fall_through);
 }
 
 
-void Intrinsifier::Integer_remainder(Assembler* assembler) {
-  Label fall_through;
-  TestBothArgumentsSmis(assembler, &fall_through);
-  // RAX: right argument (divisor)
-  __ movq(RCX, RAX);
-  __ movq(RAX, Address(RSP, + 2 * kWordSize));  // Left argument (dividend).
-  // RAX: Tagged left (dividend).
-  // RCX: Tagged right (divisor).
-  __ cmpq(RCX, Immediate(0));
-  __ j(EQUAL, &fall_through);
-  EmitRemainderOperation(assembler);
-  // Untagged remainder result in RAX.
-  __ SmiTag(RAX);
-  __ ret();
-  __ Bind(&fall_through);
-}
-
-
 void Intrinsifier::Integer_truncDivide(Assembler* assembler) {
   Label fall_through, not_32bit;
   TestBothArgumentsSmis(assembler, &fall_through);
   // RAX: right argument (divisor)
   __ cmpq(RAX, Immediate(0));
   __ j(EQUAL, &fall_through, Assembler::kNearJump);
   __ movq(RCX, RAX);
   __ movq(RAX, Address(RSP, + 2 * kWordSize));  // Left argument (dividend).
 
   // Check if both operands fit into 32bits as idiv with 64bit operands
@@ skipping 973 matching lines @@
 
 void Intrinsifier::TwoByteString_equality(Assembler* assembler) {
   StringEquality(assembler, kTwoByteStringCid);
 }
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64