Reorganize code for range analysis and suppress unnecessary debug printing of...

src/hydrogen.cc

 // Copyright 2011 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 849 matching lines @@
     InferControlFlowRange(inverted_op, compare->right(), compare->left());
   }
 }
 
 
 // We know that value [op] other. Use this information to update the range on
 // value.
 void HRangeAnalysis::InferControlFlowRange(Token::Value op,
                                            HValue* value,
                                            HValue* other) {
-  Range* range = other->range();
-  if (range == NULL) range = new Range();
+  Range temp_range;
+  Range* range = other->range() != NULL ? other->range() : &temp_range;
   Range* new_range = NULL;
 
   TraceRange("Control flow range infer %d %s %d\n",
              value->id(),
              Token::Name(op),
              other->id());
 
   if (op == Token::EQ || op == Token::EQ_STRICT) {
     // The same range has to apply for value.
     new_range = range->Copy();
@@ skipping 5119 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify();
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal