ScevValidator: Add printer for ValidatorResult

llvm-svn: 152912
diff --git a/polly/lib/Support/SCEVValidator.cpp b/polly/lib/Support/SCEVValidator.cpp
index 0b87e9e..4d0087a 100644
--- a/polly/lib/Support/SCEVValidator.cpp
+++ b/polly/lib/Support/SCEVValidator.cpp
@@ -99,8 +99,30 @@
     Type = std::max(Type, ToMerge.Type);
     addParamsFrom(ToMerge);
   }
+
+  void print(raw_ostream &OS) {
+    switch (Type) {
+      case SCEVType::INT:
+        OS << "SCEVType::INT\n";
+      break;
+      case SCEVType::PARAM:
+        OS << "SCEVType::PARAM\n";
+      break;
+      case SCEVType::IV:
+        OS << "SCEVType::IV\n";
+      break;
+      case SCEVType::INVALID:
+        OS << "SCEVType::INVALID\n";
+      break;
+    }
+  }
 };
 
+raw_ostream &operator<<(raw_ostream &OS, class ValidatorResult &VR) {
+  VR.print(OS);
+  return OS;
+}
+
 /// Check if a SCEV is valid in a SCoP.
 struct SCEVValidator
   : public SCEVVisitor<SCEVValidator, class ValidatorResult> {