[Refactor] Cleanup runtime code generation

  + Use regexp in two test case.
  + Refactor the runtime condition build function

llvm-svn: 215466
diff --git a/polly/lib/CodeGen/CodeGeneration.cpp b/polly/lib/CodeGen/CodeGeneration.cpp
index 29f36c3..4a1f2ea 100644
--- a/polly/lib/CodeGen/CodeGeneration.cpp
+++ b/polly/lib/CodeGen/CodeGeneration.cpp
@@ -1056,7 +1056,8 @@
 
     simplifyRegion(&S, this);
 
-    BasicBlock *StartBlock = executeScopConditionally(S, this);
+    Value *RTC = ConstantInt::getTrue(S.getRegionEntry()->getContext());
+    BasicBlock *StartBlock = executeScopConditionally(S, this, RTC);
 
     PollyIRBuilder Builder(StartBlock->begin());