Add a flag to help platform ports bootstrap V8

src/crankshaft/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/hydrogen.h"
 
 #include <memory>
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
@@ skipping 1342 matching lines @@
   if (exit_trampoline_block_ != NULL) {
     builder_->set_current_block(exit_trampoline_block_);
   } else {
     builder_->set_current_block(exit_block_);
   }
   finished_ = true;
 }
 
 
 HGraph* HGraphBuilder::CreateGraph() {
+  DCHECK(!FLAG_minimal);
   graph_ = new (zone()) HGraph(info_, descriptor_);
   if (FLAG_hydrogen_stats) isolate()->GetHStatistics()->Initialize(info_);
   if (!info_->IsStub() && info_->is_tracking_positions()) {
     TraceInlinedFunction(info_->shared_info(), SourcePosition::Unknown());
   }
   CompilationPhase phase("H_Block building", info_);
   set_current_block(graph()->entry_block());
   if (!BuildGraph()) return NULL;
   graph()->FinalizeUniqueness();
   return graph_;
@@ skipping 12048 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8