add a sanity check: LegalizeOp should return a value that is the same type

as its input.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27528 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index ed6cdb3417f4a6296b173d8cce22c806c916c2d2..7549569636a405409539b40562d2a9e3db10f904 100644 (file)
--- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -2688,6 +2688,9 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
   }
   }
   
+  assert(Result.getValueType() == Op.getValueType() &&
+         "Bad legalization!");
+  
   // Make sure that the generated code is itself legal.
   if (Result != Op)
     Result = LegalizeOp(Result);