Swift Calling Convention: add swifterror attribute.
A ``swifterror`` attribute can be applied to a function parameter or an
AllocaInst.
This commit does not include any target-specific change. The target-specific
optimization will come as a follow-up patch.
Differential Revision: http://reviews.llvm.org/D18092
llvm-svn: 265189
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index 418ab63..366b7f8 100644
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -78,6 +78,7 @@
isInAlloca = CS->paramHasAttr(AttrIdx, Attribute::InAlloca);
isReturned = CS->paramHasAttr(AttrIdx, Attribute::Returned);
isSwiftSelf = CS->paramHasAttr(AttrIdx, Attribute::SwiftSelf);
+ isSwiftError = CS->paramHasAttr(AttrIdx, Attribute::SwiftError);
Alignment = CS->getParamAlignment(AttrIdx);
}