[Polly] Fix for the JSON Exporter

[Mike_Jongen]

Summary

Small patch to fix the JSON exporter.

Currently, using "opt -polly-export-jscop" does not generate jscop files, but gives an error:

• Error in `opt': corrupted double-linked list: 0x0000000000bc4bb0 ***

Updated the function getAccessRelationStr() to work with the current version of getAccessRelation(), fixing the JSON exporter

[grosser]

LGTM. Do you need me to commit this for you?

[Mike_Jongen]

Yes.
Thanks

[grosser]

Committed. Thank you!

polly/trunk/lib/Analysis/ScopInfo.cpp

isl::map MemoryAccess::getNewAccessRelation() const {
   return NewAccessRelation;
 }
 
 std::string MemoryAccess::getNewAccessRelationStr() const {
   return stringFromIslObj(NewAccessRelation.get());
 }
 
 std::string MemoryAccess::getAccessRelationStr() const {
-  return isl::manage(getAccessRelation().get()).to_str();
+  return getAccessRelation().to_str();
 }
 
 isl::basic_map MemoryAccess::createBasicAccessMap(ScopStmt *Statement) {
   isl::space Space = isl::space(Statement->getIslCtx(), 0, 1);
   Space = Space.align_params(isl::manage(Statement->getDomainSpace()));
 
   return isl::basic_map::from_domain_and_range(
       isl::basic_set::universe(isl::manage(Statement->getDomainSpace())),