Swift Calling Convention: add swiftself attribute.

Differential Revision: http://reviews.llvm.org/D17866

llvm-svn: 264754
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index ee58e5f..4ce2dce 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -77,6 +77,7 @@
   isByVal    = CS->paramHasAttr(AttrIdx, Attribute::ByVal);
   isInAlloca = CS->paramHasAttr(AttrIdx, Attribute::InAlloca);
   isReturned = CS->paramHasAttr(AttrIdx, Attribute::Returned);
+  isSwiftSelf = CS->paramHasAttr(AttrIdx, Attribute::SwiftSelf);
   Alignment  = CS->getParamAlignment(AttrIdx);
 }