Check for dynamic alloca's when selecting lifetime intrinsics.

[oota-llvm.git] / lib / CodeGen / SelectionDAG / SelectionDAGBuilder.cpp

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 55924f06efd8f83dae808c39819be37baad112f9..9dff2643fa3cb8ef1359316b22ed3652f9ccb450 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -5396,7 +5396,13 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
       if (!LifetimeObject)
         continue;
 
-      int FI = FuncInfo.StaticAllocaMap[LifetimeObject];
+      // First check that the Alloca is static, otherwise it won't have a
+      // valid frame index.
+      auto SI = FuncInfo.StaticAllocaMap.find(LifetimeObject);
+      if (SI == FuncInfo.StaticAllocaMap.end())
+        return nullptr;
+
+      int FI = SI->second;
 
       SDValue Ops[2];
       Ops[0] = getRoot();