revert r147542 after comments from Joerg Sonnenberger

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147608 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Unix/Host.inc b/lib/Support/Unix/Host.inc
index 82f717f..726e2fb 100644
--- a/lib/Support/Unix/Host.inc
+++ b/lib/Support/Unix/Host.inc
@@ -35,9 +35,13 @@
   return info.release;
 }
 
-std::string getTriple(StringRef &TripleString) {
-  std::pair<StringRef, StringRef> ArchSplit = TripleString.split('-');
+std::string sys::getDefaultTargetTriple() {
+  StringRef TargetTripleString(LLVM_DEFAULT_TARGET_TRIPLE);
+  std::pair<StringRef, StringRef> ArchSplit = TargetTripleString.split('-');
+
+  // Normalize the arch, since the target triple may not actually match the target.
   std::string Arch = ArchSplit.first;
+
   std::string Triple(Arch);
   Triple += '-';
   Triple += ArchSplit.second;
@@ -57,13 +61,3 @@
 
   return Triple;
 }
-
-std::string sys::getDefaultTargetTriple() {
-  StringRef TargetTripleString(LLVM_DEFAULT_TARGET_TRIPLE);
-  return getTriple(TargetTripleString);
-}
-
-std::string sys::getHostTriple() {
-  StringRef HostTripleString(LLVM_HOST_TRIPLE);
-  return getTriple(HostTripleString);
-}