Enable delinearization by default

The performance test case just committed was the last open issue I was aware of.
We enable this by default to increase test coverage and to possibly trigger
reports of issues yet unknown.

llvm-svn: 231590
diff --git a/polly/lib/Analysis/ScopDetection.cpp b/polly/lib/Analysis/ScopDetection.cpp
index 01d8dde..b7e0e15 100644
--- a/polly/lib/Analysis/ScopDetection.cpp
+++ b/polly/lib/Analysis/ScopDetection.cpp
@@ -151,7 +151,7 @@
     PollyDelinearizeX("polly-delinearize",
                       cl::desc("Delinearize array access functions"),
                       cl::location(PollyDelinearize), cl::Hidden,
-                      cl::ZeroOrMore, cl::init(false), cl::cat(PollyCategory));
+                      cl::ZeroOrMore, cl::init(true), cl::cat(PollyCategory));
 
 static cl::opt<bool>
     VerifyScops("polly-detect-verify",