1 files changed, 8 insertions, 6 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index e0e4eed..514b215 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -1281,21 +1281,23 @@ void SelectionDAGBuilder::salvageUnresolvedDbgValue(DanglingDebugInfo &DDI) {
   while (isa<Instruction>(V)) {
     Instruction &VAsInst = *cast<Instruction>(V);
     // Temporary "0", awaiting real implementation.
+    SmallVector<uint64_t, 16> Ops;
     SmallVector<Value *, 4> AdditionalValues;
-    DIExpression *SalvagedExpr =
-        salvageDebugInfoImpl(VAsInst, Expr, StackValue, 0, AdditionalValues);
-
+    V = salvageDebugInfoImpl(VAsInst, Expr->getNumLocationOperands(), Ops,
+                             AdditionalValues);
     // If we cannot salvage any further, and haven't yet found a suitable debug
     // expression, bail out.
+    if (!V)
+      break;
+
     // TODO: If AdditionalValues isn't empty, then the salvage can only be
     // represented with a DBG_VALUE_LIST, so we give up. When we have support
     // here for variadic dbg_values, remove that condition.
-    if (!SalvagedExpr || !AdditionalValues.empty())
+    if (!AdditionalValues.empty())
       break;
 
     // New value and expr now represent this debuginfo.
-    V = VAsInst.getOperand(0);
-    Expr = SalvagedExpr;
+    Expr = DIExpression::appendOpsToArg(Expr, Ops, 0, StackValue);
 
     // Some kind of simplification occurred: check whether the operand of the
     // salvaged debug expression can be encoded in this DAG.