fix dangling arrayref by extending temporary object lifetime

Author: yibo.niu

externals/llvm-project

@@ -4025,7 +4025,7 @@ LogicalResult ConvertAtenOp<AtenIndexSelectOp>::matchAndRewrite(
     return rewriter.notifyMatchFailure(
         op, "Only RankedTensorType indices are currently supported");
 
-  auto inputShape = inputType.getShape();
+  auto inputShape = SmallVector<int64_t>(inputType.getShape());
   int inputRank = inputType.getRank();
 
   if (indexType.getRank() == 0) {