Add integer negate back to list of intrinsified methods.

runtime/vm/intrinsifier_ia32.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.
 //
 // The intrinsic code below is executed before a method has built its frame.
 // The return address is on the stack and the arguments below it.
 // Registers EDX (arguments descriptor) and ECX (function) must be preserved.
 // Each intrinsification method returns true if the corresponding
 // Dart method was intrinsified.
 
@@ skipping 705 matching lines @@
   // cannot tag the result.
   __ cmpl(EAX, Immediate(0x40000000));
   __ j(EQUAL, &fall_through);
   __ SmiTag(EAX);
   __ ret();
   __ Bind(&fall_through);
   return false;
 }
 
 
+bool Intrinsifier::Integer_negate(Assembler* assembler) {
+  Label fall_through;
+  __ movl(EAX, Address(ESP, + 1 * kWordSize));
+  __ testl(EAX, Immediate(kSmiTagMask));
+  __ j(NOT_ZERO, &fall_through, Assembler::kNearJump);  // Non-smi value.
+  __ negl(EAX);
+  __ j(OVERFLOW, &fall_through, Assembler::kNearJump);
+  // Result is in EAX.
+  __ ret();
+  __ Bind(&fall_through);
+  return false;
+}
+
+
 bool Intrinsifier::Integer_bitAndFromInteger(Assembler* assembler) {
   Label fall_through;
   TestBothArgumentsSmis(assembler, &fall_through);
   __ movl(EBX, Address(ESP, + 2 * kWordSize));
   __ andl(EAX, EBX);
   // Result is in EAX.
   __ ret();
   __ Bind(&fall_through);
   return false;
 }
@@ skipping 711 matching lines @@
   __ Bind(&is_true);
   __ LoadObject(EAX, bool_true);
   __ ret();
   return true;
 }
 
 #undef __
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32