Change the maximum optimization count into a commandline flag.

src/hydrogen.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 2011 matching lines @@
         TRACE_GVN_1("Updated first-time accumulated %s\n",
                     *GetGVNFlagsString(*first_time_changes));
       }
     }
     instr = next;
   }
 }
 
 
 bool HGlobalValueNumberer::AllowCodeMotion() {
-  return info()->shared_info()->opt_count() + 1 < Compiler::kDefaultMaxOptCount;
+  return info()->shared_info()->opt_count() + 1 < FLAG_max_opt_count;
 }
 
 
 bool HGlobalValueNumberer::ShouldMove(HInstruction* instr,
                                       HBasicBlock* loop_header) {
   // If we've disabled code motion or we're in a block that unconditionally
   // deoptimizes, don't move any instructions.
   return AllowCodeMotion() && !instr->block()->IsDeoptimizing();
 }
 
@@ skipping 7654 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal