Local variables whose address is taken and passed on to a call are described
in debug info using their stack slots instead of as an indirection of param reg + 0
offset. This is done by detecting FrameIndexSDNodes in SelectionDAG and generating
FrameIndexDbgValues for them. This ultimately generates DBG_VALUEs with stack
location operands.
Differential Revision: http://reviews.llvm.org/D23283
llvm-svn: 278703
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
index 18c39d0..6672de0 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
@@ -942,6 +942,11 @@
/// Update the DAG and DAG builder with the relevant information after
/// a new root node has been created which could be a tail call.
void updateDAGForMaybeTailCall(SDValue MaybeTC);
+
+ /// Return the appropriate SDDbgValue based on N.
+ SDDbgValue *getDbgValue(SDValue N, DILocalVariable *Variable,
+ DIExpression *Expr, int64_t Offset, DebugLoc dl,
+ unsigned DbgSDNodeOrder);
};
/// RegsForValue - This struct represents the registers (physical or virtual)