Generate debug info for by-value struct args even if they are not used.
radar://problem/13865940
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182062 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 2ded723..7072def 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -6753,9 +6753,15 @@
// If this argument is unused then remember its value. It is used to generate
// debugging information.
- if (I->use_empty() && NumValues)
+ if (I->use_empty() && NumValues) {
SDB->setUnusedArgValue(I, InVals[i]);
+ // Also remember any frame index for use in FastISel.
+ if (FrameIndexSDNode *FI =
+ dyn_cast<FrameIndexSDNode>(InVals[i].getNode()))
+ FuncInfo->setArgumentFrameIndex(I, FI->getIndex());
+ }
+
for (unsigned Val = 0; Val != NumValues; ++Val) {
EVT VT = ValueVTs[Val];
MVT PartVT = TLI.getRegisterType(*CurDAG->getContext(), VT);