ARM64: Small optimisations

src/arm64/lithium-arm64.cc

 // Copyright 2013 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 "v8.h"
 
 #include "lithium-allocator-inl.h"
 #include "arm64/lithium-arm64.h"
 #include "arm64/lithium-codegen-arm64.h"
 #include "hydrogen-osr.h"
@@ skipping 1991 matching lines @@
 
 
 LInstruction* LChunkBuilder::DoDoubleBits(HDoubleBits* instr) {
   HValue* value = instr->value();
   ASSERT(value->representation().IsDouble());
   return DefineAsRegister(new(zone()) LDoubleBits(UseRegister(value)));
 }
 
 
 LInstruction* LChunkBuilder::DoConstructDouble(HConstructDouble* instr) {
-  LOperand* lo = UseRegister(instr->lo());
+  LOperand* lo = UseRegisterAndClobber(instr->lo());
   LOperand* hi = UseRegister(instr->hi());
-  LOperand* temp = TempRegister();
-  return DefineAsRegister(new(zone()) LConstructDouble(hi, lo, temp));
+  return DefineAsRegister(new(zone()) LConstructDouble(hi, lo));
 }
 
 
 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(), x0), context,
                              parameter_count);
@@ skipping 677 matching lines @@
 
 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
   LOperand* receiver = UseRegister(instr->receiver());
   LOperand* function = UseRegister(instr->function());
   LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function);
   return AssignEnvironment(DefineAsRegister(result));
 }
 
 
 } }  // namespace v8::internal