Subzero: Randomize register assignment.

src/IceDefs.h

 //===- subzero/src/IceDefs.h - Common Subzero declaraions -------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares various useful types and classes that have
@@ skipping 83 matching lines @@
   IceV_Deleted = 1 << 1,
   IceV_InstNumbers = 1 << 2,
   IceV_Preds = 1 << 3,
   IceV_Succs = 1 << 4,
   IceV_Liveness = 1 << 5,
   IceV_RegManager = 1 << 6,
   IceV_RegOrigins = 1 << 7,
   IceV_LinearScan = 1 << 8,
   IceV_Frame = 1 << 9,
   IceV_Timing = 1 << 10,
+  IceV_Random = 1 << 11,
   IceV_All = ~IceV_None
 };
 typedef uint32_t VerboseMask;
 
 typedef llvm::raw_ostream Ostream;
 
 // TODO: Implement in terms of std::chrono after switching to C++11.
 class Timer {
 public:
   Timer() : Start(llvm::TimeRecord::getCurrentTime(false)) {}
   uint64_t getElapsedNs() const { return getElapsedSec() * 1000 * 1000 * 1000; }
   uint64_t getElapsedUs() const { return getElapsedSec() * 1000 * 1000; }
   uint64_t getElapsedMs() const { return getElapsedSec() * 1000; }
   double getElapsedSec() const {
     llvm::TimeRecord End = llvm::TimeRecord::getCurrentTime(false);
     return End.getWallTime() - Start.getWallTime();
   }
   void printElapsedUs(GlobalContext *Ctx, const IceString &Tag) const;
 
 private:
   const llvm::TimeRecord Start;
   Timer(const Timer &) LLVM_DELETED_FUNCTION;
   Timer &operator=(const Timer &) LLVM_DELETED_FUNCTION;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEDEFS_H