Add -reorder-basic-blocks option and fix nop insertion

src/IceClFlags.h

 //===- subzero/src/IceClFlags.h - Cl Flags for translation ------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 142 matching lines @@
     return RandomizeAndPoolImmediatesOption;
   }
 
   void setRandomizeAndPoolImmediatesThreshold(uint32_t Threshold) {
     RandomizeAndPoolImmediatesThreshold = Threshold;
   }
   uint32_t getRandomizeAndPoolImmediatesThreshold() const {
     return RandomizeAndPoolImmediatesThreshold;
   }
 
+  bool shouldReorderBasicBlocks() const { return ReorderBasicBlocks; }
+  void setShouldReorderBasicBlocks(bool NewValue) {
+    ReorderBasicBlocks = NewValue;
+  }
+
   void setShouldReorderFunctions(bool Option) { ReorderFunctions = Option; }
   bool shouldReorderFunctions() const { return ReorderFunctions; }
 
   void setReorderFunctionsWindowSize(uint32_t Size) {
     ReorderFunctionsWindowSize = Size;
   }
   uint32_t getReorderFunctionsWindowSize() const {
     return ReorderFunctionsWindowSize;
   }
 
@@ skipping 56 matching lines @@
   bool DisableInternal;
   bool DisableIRGeneration;
   bool DisableTranslation;
   bool DumpStats;
   bool EnableBlockProfile;
   bool FunctionSections;
   bool GenerateUnitTestMessages;
   bool PhiEdgeSplit;
   bool RandomNopInsertion;
   bool RandomRegAlloc;
+  bool ReorderBasicBlocks;
   bool ReorderFunctions;
   bool ReorderGlobalVariables;
   bool ReorderPooledConstants;
   bool SkipUnimplemented;
   bool SubzeroTimingEnabled;
   bool TimeEachFunction;
   bool UseAdvancedSwitchLowering;
   bool UseSandboxing;
 
   OptLevel Opt;
@@ skipping 14 matching lines @@
   IceString TranslateOnly;
   IceString VerboseFocusOn;
 
   size_t NumTranslationThreads; // 0 means completely sequential
   uint64_t RandomSeed;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICECLFLAGS_H