Rename metadata llvm.loop.vectorize.unroll to llvm.loop.vectorize.interleave.

llvm-svn: 213588
diff --git a/llvm/lib/IR/AutoUpgrade.cpp b/llvm/lib/IR/AutoUpgrade.cpp
index 6554b3c..459bd88 100644
--- a/llvm/lib/IR/AutoUpgrade.cpp
+++ b/llvm/lib/IR/AutoUpgrade.cpp
@@ -580,7 +580,9 @@
 
 void llvm::UpgradeMDStringConstant(std::string &String) {
   const std::string OldPrefix = "llvm.vectorizer.";
-  if (String.find(OldPrefix) == 0) {
-        String.replace(0, OldPrefix.size(), "llvm.loop.vectorize.");
+  if (String == "llvm.vectorizer.unroll") {
+    String = "llvm.loop.interleave.count";
+  } else if (String.find(OldPrefix) == 0) {
+    String.replace(0, OldPrefix.size(), "llvm.loop.vectorize.");
   }
 }