For now, abort when an ISD::VAARG is encountered on x86-64, rather
than silently generate invalid code.

llvm-gcc does not currently use VAArgInst; it lowers va_arg in the
front-end.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50930 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h
index f42ff39..060a1f5 100644
--- a/lib/Target/X86/X86ISelLowering.h
+++ b/lib/Target/X86/X86ISelLowering.h
@@ -517,6 +517,7 @@
     SDOperand LowerDYNAMIC_STACKALLOC(SDOperand Op, SelectionDAG &DAG);
     SDOperand LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG);
     SDOperand LowerVASTART(SDOperand Op, SelectionDAG &DAG);
+    SDOperand LowerVAARG(SDOperand Op, SelectionDAG &DAG);
     SDOperand LowerVACOPY(SDOperand Op, SelectionDAG &DAG);
     SDOperand LowerINTRINSIC_WO_CHAIN(SDOperand Op, SelectionDAG &DAG);
     SDOperand LowerRETURNADDR(SDOperand Op, SelectionDAG &DAG);