Move first_artificial_register_ initialization to the right place.

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 744 matching lines @@
           return;
         }
       }
     }
   }
   move->AddMove(from, to);
 }
 
 
 void LAllocator::MeetRegisterConstraints(HBasicBlock* block) {
-  first_artificial_register_ = next_virtual_register_;
   int start = block->first_instruction_index();
   int end = block->last_instruction_index();
   for (int i = start; i <= end; ++i) {
     if (chunk_->IsGapAt(i)) {
       InstructionSummary* summary = NULL;
       InstructionSummary* prev_summary = NULL;
       if (i < end) summary = GetSummary(i + 1);
       if (i > start) prev_summary = GetSummary(i - 1);
       MeetConstraintsBetween(prev_summary, summary, i);
     }
@@ skipping 260 matching lines @@
   AllocateDoubleRegisters();
   PopulatePointerMaps();
   if (has_osr_entry_) ProcessOsrEntry();
   ConnectRanges();
   ResolveControlFlow();
 }
 
 
 void LAllocator::MeetRegisterConstraints() {
   HPhase phase("Register constraints", chunk());
+  first_artificial_register_ = next_virtual_register_;
   const ZoneList<HBasicBlock*>* blocks = graph()->blocks();
   for (int i = 0; i < blocks->length(); ++i) {
     HBasicBlock* block = blocks->at(i);
     MeetRegisterConstraints(block);
   }
 }
 
 
 void LAllocator::ResolvePhis() {
   HPhase phase("Resolve phis", chunk());
@@ skipping 1064 matching lines @@
     LiveRange* current = live_ranges()->at(i);
     if (current != NULL) current->Verify();
   }
 }
 
 
 #endif
 
 
 } }  // namespace v8::internal