Rerun mem2reg after the inliner

It did happen that after the inliner finished we end up with promotable
allocas in a function. We now run mem2reg to make sure everything is
promoted if possible.

llvm-svn: 288514

polly/lib/Transform/Canonicalization.cpp

@@ -37,6 +37,7 @@ void polly::registerCanonicalicationPasses(llvm::legacy::PassManagerBase &PM) {
   PM.add(llvm::createLoopRotatePass());
   if (PollyInliner) {
     PM.add(llvm::createFunctionInliningPass(200));
+    PM.add(llvm::createPromoteMemoryToRegisterPass());
     PM.add(llvm::createCFGSimplificationPass());
     PM.add(llvm::createInstructionCombiningPass());
     PM.add(createBarrierNoopPass());