Add RegionPass support.

A RegionPass is executed like a LoopPass but on the regions detected by the
RegionInfo pass instead of the loops detected by the LoopInfo pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116905 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/CMakeLists.txt

@@ -40,6 +40,7 @@ add_llvm_library(LLVMAnalysis
   ProfileInfoLoaderPass.cpp
   ProfileVerifierPass.cpp
   RegionInfo.cpp
+  RegionPass.cpp
   RegionPrinter.cpp
   ScalarEvolution.cpp
   ScalarEvolutionAliasAnalysis.cpp