Allow more virtual registers to be encoded in LUnallocated.

src/lithium.cc

 // Copyright 2012 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 40 matching lines @@
 
 void LOperand::PrintTo(StringStream* stream) {
   LUnallocated* unalloc = NULL;
   switch (kind()) {
     case INVALID:
       stream->Add("(0)");
       break;
     case UNALLOCATED:
       unalloc = LUnallocated::cast(this);
       stream->Add("v%d", unalloc->virtual_register());
-      switch (unalloc->policy()) {
+      if (unalloc->basic_policy() == LUnallocated::FIXED_SLOT) {
+        stream->Add("(=%dS)", unalloc->fixed_slot_index());
+        break;
+      }
+      switch (unalloc->extended_policy()) {
         case LUnallocated::NONE:
           break;
         case LUnallocated::FIXED_REGISTER: {
+          int reg_index = unalloc->fixed_register_index();
           const char* register_name =
-              Register::AllocationIndexToString(unalloc->fixed_index());
+              Register::AllocationIndexToString(reg_index);
           stream->Add("(=%s)", register_name);
           break;
         }
         case LUnallocated::FIXED_DOUBLE_REGISTER: {
+          int reg_index = unalloc->fixed_register_index();
           const char* double_register_name =
-              DoubleRegister::AllocationIndexToString(unalloc->fixed_index());
+              DoubleRegister::AllocationIndexToString(reg_index);
           stream->Add("(=%s)", double_register_name);
           break;
         }
-        case LUnallocated::FIXED_SLOT:
-          stream->Add("(=%dS)", unalloc->fixed_index());
-          break;
         case LUnallocated::MUST_HAVE_REGISTER:
           stream->Add("(R)");
           break;
         case LUnallocated::WRITABLE_REGISTER:
           stream->Add("(WR)");
           break;
         case LUnallocated::SAME_AS_FIRST_INPUT:
           stream->Add("(1)");
           break;
         case LUnallocated::ANY:
@@ skipping 397 matching lines @@
       } else {
         spill_slot_count_++;
       }
     }
     iterator.Advance();
   }
 }
 
 
 } }  // namespace v8::internal