'Pass' should now not be derived from by clients. Instead, they should derive

from ModulePass.  Instead of implementing Pass::run, then should implement
ModulePass::runOnModule.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16436 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/PassManager.h

@@ -20,6 +20,7 @@
 namespace llvm {
 
 class Pass;
+class ModulePass;
 class Module;
 class ModuleProvider;
 template<class UnitType> class PassManagerT;