Revert "Declare GlobalValue::LinkageTypes based on unsigned."

This reverts commit r267335.  The build has been broken for hours
because of it:

  http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_build/23352/

The correct fix is avoid using any enum in a bitfield.

llvm-svn: 267341

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/include/llvm/IR/GlobalValue.h b/llvm/include/llvm/IR/GlobalValue.h
index 25e5ba18924..0d12fe86819 100644
--- a/llvm/include/llvm/IR/GlobalValue.h
+++ b/llvm/include/llvm/IR/GlobalValue.h
@@ -37,7 +37,7 @@ class GlobalValue : public Constant {
   GlobalValue(const GlobalValue &) = delete;
 public:
   /// @brief An enumeration for the kinds of linkage for global values.
-  enum LinkageTypes : unsigned {
+  enum LinkageTypes {
     ExternalLinkage = 0,///< Externally visible function
     AvailableExternallyLinkage, ///< Available for inspection, not emission.
     LinkOnceAnyLinkage, ///< Keep one copy of function when linking (inline)