Re-apply 68552.
Tested by bootstrapping llvm-gcc and using that to build llvm.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68645 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h
index 45b3e97..050b869 100644
--- a/lib/Target/X86/X86ISelLowering.h
+++ b/lib/Target/X86/X86ISelLowering.h
@@ -188,8 +188,11 @@
       /// in order to obtain suitable precision.
       FRSQRT, FRCP,
 
-      // TLSADDR, THREAD_POINTER - Thread Local Storage.
-      TLSADDR, THREAD_POINTER,
+      // TLSADDR - Thread Local Storage.
+      TLSADDR,
+
+      // SegmentBaseAddress - The address segment:0
+      SegmentBaseAddress,
 
       // EH_RETURN - Exception Handling helpers.
       EH_RETURN,