Add doInitialization and doFinalization methods to ModulePass's, to allow them to be re-initialized and reused on multiple Module's.

Patch by Pedro Artigas.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168008 91177308-0d34-0410-b5e6-96231b3b80d8

tools/opt/opt.cpp

@@ -820,7 +820,9 @@ int main(int argc, char **argv) {
   cl::PrintOptionValues();
 
   // Now that we have all of the passes ready, run them.
+  Passes.doInitialization();
   Passes.run(*M.get());
+  Passes.doFinalization();
 
   // Declare success.
   if (!NoOutput || PrintBreakpoints)