If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121059 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 6dfc6b5..64debfc 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -908,11 +908,8 @@
Val.getResNo(), Offset, dl, DbgSDNodeOrder);
DAG.AddDbgValue(SDV, Val.getNode(), false);
}
- } else {
- SDV = DAG.getDbgValue(Variable, UndefValue::get(V->getType()),
- Offset, dl, SDNodeOrder);
- DAG.AddDbgValue(SDV, 0, false);
- }
+ } else
+ DEBUG(dbgs() << "Dropping debug info for " << DI);
DanglingDebugInfoMap[V] = DanglingDebugInfo();
}
}
@@ -4198,10 +4195,7 @@
// Check if address has undef value.
if (isa<UndefValue>(Address) ||
(Address->use_empty() && !isa<Argument>(Address))) {
- SDDbgValue*SDV =
- DAG.getDbgValue(Variable, UndefValue::get(Address->getType()),
- 0, dl, SDNodeOrder);
- DAG.AddDbgValue(SDV, 0, false);
+ DEBUG(dbgs() << "Dropping debug info for " << DI);
return 0;
}
@@ -4224,16 +4218,20 @@
// Byval parameter. We have a frame index at this point.
SDV = DAG.getDbgValue(Variable, FINode->getIndex(),
0, dl, SDNodeOrder);
- else
+ else {
// Can't do anything with other non-AI cases yet. This might be a
// parameter of a callee function that got inlined, for example.
+ DEBUG(dbgs() << "Dropping debug info for " << DI);
return 0;
+ }
} else if (AI)
SDV = DAG.getDbgValue(Variable, N.getNode(), N.getResNo(),
0, dl, SDNodeOrder);
- else
+ else {
// Can't do anything with other non-AI cases yet.
+ DEBUG(dbgs() << "Dropping debug info for " << DI);
return 0;
+ }
DAG.AddDbgValue(SDV, N.getNode(), isParameter);
} else {
// If Address is an argument then try to emit its dbg value using
@@ -4253,10 +4251,7 @@
}
}
}
- // Otherwise add undef to help track missing debug info.
- SDV = DAG.getDbgValue(Variable, UndefValue::get(Address->getType()),
- 0, dl, SDNodeOrder);
- DAG.AddDbgValue(SDV, 0, false);
+ DEBUG(dbgs() << "Dropping debug info for " << DI);
}
}
return 0;
@@ -4301,10 +4296,8 @@
DanglingDebugInfoMap[V] = DDI;
} else {
// We may expand this to cover more cases. One case where we have no
- // data available is an unreferenced parameter; we need this fallback.
- SDV = DAG.getDbgValue(Variable, UndefValue::get(V->getType()),
- Offset, dl, SDNodeOrder);
- DAG.AddDbgValue(SDV, 0, false);
+ // data available is an unreferenced parameter.
+ DEBUG(dbgs() << "Dropping debug info for " << DI);
}
}