Mac OS X X86-64 low 4G address not available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40701 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index 6195676..f166b9b 100644
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -614,7 +614,8 @@
       bool isStatic = TM.getRelocationModel() == Reloc::Static;
       SDOperand N0 = N.getOperand(0);
       // Mac OS X X86-64 lower 4G address is not available.
-      bool isAbs32 = !is64Bit || (isStatic && !Subtarget->isTargetDarwin());
+      bool isAbs32 = !is64Bit ||
+        (isStatic && Subtarget->hasLow4GUserSpaceAddress());
       if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(N0)) {
         GlobalValue *GV = G->getGlobal();
         if (isAbs32 || isRoot) {