Rename loop unrolling and loop vectorizer metadata to have a common prefix.

[LLVM part]

These patches rename the loop unrolling and loop vectorizer metadata
such that they have a common 'llvm.loop.' prefix.  Metadata name
changes:

llvm.vectorizer.* => llvm.loop.vectorizer.*
llvm.loopunroll.* => llvm.loop.unroll.*

This was a suggestion from an earlier review
(http://reviews.llvm.org/D4090) which added the loop unrolling
metadata. 

Patch by Mark Heffernan.

llvm-svn: 211710

1 files changed, 7 insertions, 0 deletions

diff --git a/llvm/lib/IR/AutoUpgrade.cpp b/llvm/lib/IR/AutoUpgrade.cpp
index 05b3745ab0f..6554b3c5da9 100644
--- a/llvm/lib/IR/AutoUpgrade.cpp
+++ b/llvm/lib/IR/AutoUpgrade.cpp
@@ -577,3 +577,10 @@ bool llvm::UpgradeDebugInfo(Module &M) {
   }
   return RetCode;
 }
+
+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.");
+  }
+}