Try to fix a layering violation introduced by r213945

The dragonegg buildbot (and others?) started failing after
r213945/r213946 because `llvm-as` wasn't linking in the bitcode reader.
I think moving the verify functions to the same file as the verify pass
should fix the build.  Adding a command-line option for maintaining
use-list order in assembly as a drive-by to prevent warnings about
unused static functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213947 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/IR/UseListOrder.h

@@ -15,28 +15,21 @@
 #ifndef LLVM_IR_USELISTORDER_H
 #define LLVM_IR_USELISTORDER_H
 
+#include "llvm/ADT/ArrayRef.h"
+
 namespace llvm {
 
 class Module;
 
 /// \brief Whether to preserve use-list ordering.
 bool shouldPreserveBitcodeUseListOrder();
+bool shouldPreserveAssemblyUseListOrder();
 
 /// \brief Shuffle all use-lists in a module.
 ///
 /// Adds \c SeedOffset to the default seed for the random number generator.
 void shuffleUseLists(Module &M, unsigned SeedOffset = 0);
 
-/// \brief Verify use-list order after serializing to bitcode.
-///
-/// \return \c true if there are no errors.
-bool verifyBitcodeUseListOrder(const Module &M);
-
-/// \brief Verify use-list order after serializing to assembly.
-///
-/// \return \c true if there are no errors.
-bool verifyAssemblyUseListOrder(const Module &M);
-
 } // end namespace llvm
 
 #endif