Install guards for new invariants required for parallel compilation.

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 373 matching lines @@
 }
 
 
 Representation LChunk::LookupLiteralRepresentation(
     LConstantOperand* operand) const {
   return graph_->LookupValue(operand->index())->representation();
 }
 
 
 LChunk* LChunk::NewChunk(HGraph* graph) {
+  NoHandleAllocation no_handles;
+  AssertNoAllocation no_gc;
+
   int values = graph->GetMaximumValueID();
   if (values > LUnallocated::kMaxVirtualRegisters) {
     if (FLAG_trace_bailout) {
       PrintF("Not enough virtual registers for (values).\n");
     }
     return NULL;
   }
   LAllocator allocator(values, graph);
   LChunkBuilder builder(graph->info(), graph, &allocator);
   LChunk* chunk = builder.Build();
@@ skipping 26 matching lines @@
         CodeGenerator::MakeCodeEpilogue(&assembler, flags, info());
     generator.FinishCode(code);
     CodeGenerator::PrintCode(code, info());
     return code;
   }
   return Handle<Code>::null();
 }
 
 
 } }  // namespace v8::internal