Remove unnecessary recording of temp operands in the register allocator....

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 819 matching lines @@
       } else if (cur_input->policy() == LUnallocated::WRITABLE_REGISTER) {
         LUnallocated* input_copy = cur_input->CopyUnconstrained();
         cur_input->set_virtual_register(next_virtual_register_++);
 
         if (RequiredRegisterKind(input_copy->virtual_register()) ==
             DOUBLE_REGISTERS) {
           double_artificial_registers_.Add(
               cur_input->virtual_register() - first_artificial_register_);
         }
 
-        second->AddTemp(cur_input);

[Vyacheslav Egorov (Chromium), 2011/01/17 09:54:50]

Add assert that cur_input is used at end, not at start to guarantee equivalent
liveranges.

         AddConstraintsGapMove(gap_index, input_copy, cur_input);
       }
     }
   }
 
   // Handle "output same as input" for second instruction.
   if (second != NULL && second->Output() != NULL) {
     LUnallocated* second_output = LUnallocated::cast(second->Output());
     if (second_output->HasSameAsInputPolicy()) {
       LUnallocated* cur_input = LUnallocated::cast(second->InputAt(0));
@@ skipping 1294 matching lines @@
     LiveRange* current = live_ranges()->at(i);
     if (current != NULL) current->Verify();
   }
 }
 
 
 #endif
 
 
 } }  // namespace v8::internal