Use rip-rel addressing on win64 by default. For this we just
defaults to small pic code model.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111741 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index 88a5edb..0d02e5e 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -73,7 +73,7 @@
       if (GV->hasDefaultVisibility() &&
           (isDecl || GV->isWeakForLinker()))
         return X86II::MO_GOTPCREL;
-    } else {
+    } else if (!isTargetWin64()) {
       assert(isTargetELF() && "Unknown rip-relative target");
 
       // Extra load is needed for all externally visible.