Satisfy C++ aliasing rules, per suggestion by Chandler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158346 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 1 deletions

diff --git a/include/llvm/Support/ThreadLocal.h b/include/llvm/Support/ThreadLocal.h
index 1a0a00f..2957034 100644
--- a/include/llvm/Support/ThreadLocal.h
+++ b/include/llvm/Support/ThreadLocal.h
@@ -28,7 +28,12 @@ namespace llvm {
       ///
       /// This is embedded in the class and we avoid malloc'ing/free'ing it,
       /// to make this class more safe for use along with CrashRecoveryContext.
-      ThreadLocalDataTy data;
+      union {
+        char data[sizeof(ThreadLocalDataTy)];
+        struct {
+          ThreadLocalDataTy align_data;
+        };
+      };
     public:
       ThreadLocalImpl();
       virtual ~ThreadLocalImpl();