Deoptimization fix for HPushArgument.

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 93 matching lines @@
       break;
     case DOUBLE_STACK_SLOT:
       stream->Add("[double_stack:%d]", index());
       break;
     case REGISTER:
       stream->Add("[%s|R]", Register::AllocationIndexToString(index()));
       break;
     case DOUBLE_REGISTER:
       stream->Add("[%s|R]", DoubleRegister::AllocationIndexToString(index()));
       break;
-    case ARGUMENT:
-      stream->Add("[arg:%d]", index());
-      break;
   }
 }
 
 #define DEFINE_OPERAND_CACHE(name, type)                      \
   L##name* L##name::cache = NULL;                             \
                                                               \
   void L##name::SetUpCache() {                                \
     if (cache) return;                                        \
     cache = new L##name[kNumCachedOperands];                  \
     for (int i = 0; i < kNumCachedOperands; i++) {            \
@@ skipping 364 matching lines @@
                                zone());
   int argument_index = *argument_index_accumulator;
 
   // Store the environment description into the environment
   // (with holes for nested objects)
   for (int i = 0; i < hydrogen_env->length(); ++i) {
     if (hydrogen_env->is_special_index(i)) continue;
 
     LOperand* op;
     HValue* value = hydrogen_env->values()->at(i);
+    CHECK(!value->IsPushArgument());  // Do not deopt outgoing arguments
     if (value->IsArgumentsObject() || value->IsCapturedObject()) {
       op = LEnvironment::materialization_marker();
-    } else if (value->IsPushArgument()) {
-      op = new(zone()) LArgument(argument_index++);
     } else {
       op = UseAny(value);
     }
     result->AddValue(op,
                      value->representation(),
                      value->CheckFlag(HInstruction::kUint32));
   }
 
   // Recursively store the nested objects into the environment
   for (int i = 0; i < hydrogen_env->length(); ++i) {
@@ skipping 93 matching lines @@
 
 
 LPhase::~LPhase() {
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceLithium(name(), chunk_);
   }
 }
 
 
 } }  // namespace v8::internal