Filter out variables which should not be params

Previously we collected all variables declared and used in for loops and
made them into target region parameters. Now we check wether these
variables where declared outside the target region first.

Author: manorom

clang/tools/sotoc/src/Visitors.cpp

@@ -197,6 +197,11 @@ void FindTargetCodeVisitor::addTargetRegionArgs(
   for (const auto i : *FindLoopVisitor.getVarSet()) {
     DEBUGP("Iterating var set");
     // i->print(llvm::outs());
+    if (Context.getSourceManager().isBeforeInTranslationUnit(
+          S->getBeginLoc(),i->getSourceRange().getBegin())) {
+      tmpSet.insert(i);
+      continue;
+    }
     for (auto j : *TCR->getOMPClauses()) {
       for (auto CC : j->children()) {
         if (auto CC_DeclRefExpr =