Subzero: Clean up a few areas.

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 11 matching lines @@
 #include <functional> // std::less
 #include <limits>
 #include <list>
 #include <map>
 #include <string>
 #include <vector>
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/ilist.h"
 #include "llvm/ADT/ilist_node.h"
+#include "llvm/ADT/iterator_range.h"
 #include "llvm/ADT/SmallBitVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/ELF.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace Ice {
 
@@ skipping 108 matching lines @@
   IceV_AddrOpt = 1 << 10,
   IceV_Random = 1 << 11,
   IceV_All = ~IceV_None,
   IceV_Most = IceV_All & ~IceV_LinearScan
 };
 typedef uint32_t VerboseMask;
 
 typedef llvm::raw_ostream Ostream;
 typedef llvm::raw_fd_ostream Fdstream;
 
+// Reverse range adaptors written in terms of llvm::make_range().
+template <typename T>
+llvm::iterator_range<typename T::const_reverse_iterator>
+reverse_range(const T &Container) {
+  return llvm::make_range(Container.rbegin(), Container.rend());
+}
+template <typename T>
+llvm::iterator_range<typename T::reverse_iterator> reverse_range(T &Container) {
+  return llvm::make_range(Container.rbegin(), Container.rend());
+}
+
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEDEFS_H