Disable constant-offset folding for PowerPC, as the PowerPC target
isn't yet prepared for it.

llvm-svn: 57886
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.h b/llvm/lib/Target/PowerPC/PPCISelLowering.h
index fa689de..00f707d 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.h
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.h
@@ -329,6 +329,8 @@
                                                    SDValue Ret,
                                                    SelectionDAG &DAG) const;
 
+    virtual bool isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const;
+
   private:
     SDValue getFramePointerFrameIndex(SelectionDAG & DAG) const;
     SDValue getReturnAddrFrameIndex(SelectionDAG & DAG) const;