[intrinsics] Drop the now obsolete %_DoubleHi and %_DoubleLo intrinsics.

src/crankshaft/mips64/lithium-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/mips64/lithium-mips64.h"
 
 #include <sstream>
 
 #if V8_TARGET_ARCH_MIPS64
 
@@ skipping 1912 matching lines @@
     return DefineAsRegister(new(zone()) LClampIToUint8(reg));
   } else {
     DCHECK(input_rep.IsSmiOrTagged());
     LClampTToUint8* result =
         new(zone()) LClampTToUint8(reg, TempDoubleRegister());
     return AssignEnvironment(DefineAsRegister(result));
   }
 }
 
 
-LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) {
-  HValue* value = instr->value();
-  DCHECK(value->representation().IsDouble());
-  return DefineAsRegister(new(zone()) LDoubleBits(UseRegister(value)));
-}
-
-
 LInstruction* LChunkBuilder::DoReturn(HReturn* instr) {
   LOperand* context = info()->IsStub()
       ? UseFixed(instr->context(), cp)
       : NULL;
   LOperand* parameter_count = UseRegisterOrConstant(instr->parameter_count());
   return new(zone()) LReturn(UseFixed(instr->value(), v0), context,
                              parameter_count);
 }
 
 
@@ skipping 508 matching lines @@
   LOperand* index = UseTempRegister(instr->index());
   LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64