[Polly] Remove usage of the `apply` function

Summary:
API-wise `apply` is a somewhat unidiomatic one-off function, and
removing the only(?) use in polly will let me remove it from SCEV's
exposed interface.

Reviewers: jdoerfert, Meinersbur, grosser

Subscribers: grosser, mcrosier, pollydev

Differential Revision: http://reviews.llvm.org/D20779

llvm-svn: 271177

polly/lib/CodeGen/BlockGenerators.cpp

@@ -73,7 +73,7 @@ Value *BlockGenerator::trySynthesizeNewValue(ScopStmt &Stmt, Value *Old,
   if (isa<SCEVCouldNotCompute>(Scev))
     return nullptr;
 
-  const SCEV *NewScev = apply(Scev, LTS, SE);
+  const SCEV *NewScev = SCEVLoopAddRecRewriter::rewrite(Scev, LTS, SE);
   ValueMapT VTV;
   VTV.insert(BBMap.begin(), BBMap.end());
   VTV.insert(GlobalMap.begin(), GlobalMap.end());