DAG: Avoid bitcast/ext/build_vector combine

[android-x86/external-llvm.git] / lib / CodeGen / SelectionDAG / DAGCombiner.cpp

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 6d59f33..715f203 100644 (file)
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -14918,7 +14918,10 @@ SDValue DAGCombiner::reduceBuildVecExtToExtBuildVec(SDNode *N) {
   assert(VecVT.getSizeInBits() == VT.getSizeInBits() &&
          "Invalid vector size");
   // Check if the new vector type is legal.
-  if (!isTypeLegal(VecVT)) return SDValue();
+  if (!isTypeLegal(VecVT) ||
+      (!TLI.isOperationLegal(ISD::BUILD_VECTOR, VecVT) &&
+       TLI.isOperationLegal(ISD::BUILD_VECTOR, VT)))
+    return SDValue();
 
   // Make the new BUILD_VECTOR.
   SDValue BV = DAG.getBuildVector(VecVT, DL, Ops);