Optimize instanceof further...

src/lithium-allocator.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 919 matching lines @@
 
         if (summary->IsCall()) {
           for (int i = 0; i < Register::kNumAllocatableRegisters; ++i) {
             if (output == NULL || !output->IsRegister() ||
                 output->index() != i) {
               LiveRange* range = FixedLiveRangeFor(i);
               range->AddUseInterval(curr_position,
                                     curr_position.InstructionEnd());
             }
           }
+        }
+
+        if (summary->IsCall() || summary->IsSaveDoubles()) {
           for (int i = 0; i < DoubleRegister::kNumAllocatableRegisters; ++i) {
             if (output == NULL || !output->IsDoubleRegister() ||
                 output->index() != i) {
               LiveRange* range = FixedDoubleLiveRangeFor(i);
               range->AddUseInterval(curr_position,
                                     curr_position.InstructionEnd());
             }
           }
         }
 
@@ skipping 620 matching lines @@
   }
   return GENERAL_REGISTERS;
 }
 
 
 void LAllocator::MarkAsCall() {
   current_summary()->MarkAsCall();
 }
 
 
+void LAllocator::MarkAsSaveDoubles() {
+  current_summary()->MarkAsSaveDoubles();
+}
+
+
 void LAllocator::RecordDefinition(HInstruction* instr, LUnallocated* operand) {
   operand->set_virtual_register(instr->id());
   current_summary()->SetOutput(operand);
 }
 
 
 void LAllocator::RecordTemporary(LUnallocated* operand) {
   ASSERT(next_virtual_register_ < LUnallocated::kMaxVirtualRegisters);
   if (!operand->HasFixedPolicy()) {
     operand->set_virtual_register(next_virtual_register_++);
@@ skipping 517 matching lines @@
     LiveRange* current = live_ranges()->at(i);
     if (current != NULL) current->Verify();
   }
 }
 
 
 #endif
 
 
 } }  // namespace v8::internal