[mlir] Apply ClangTidy performance finding.

loop variable is copied but only used as const reference.

diff --git a/mlir/test/lib/Interfaces/TilingInterface/TestTilingInterface.cpp b/mlir/test/lib/Interfaces/TilingInterface/TestTilingInterface.cpp
index edb7ba3..977a054 100644 (file)
--- a/mlir/test/lib/Interfaces/TilingInterface/TestTilingInterface.cpp
+++ b/mlir/test/lib/Interfaces/TilingInterface/TestTilingInterface.cpp
@@ -116,7 +116,7 @@ struct TestTileConsumerAndFuseProducersGreedilyUsingSCFForOp
     }
     // Replace the tiled op with replacements.
     SmallVector<Value> replacements(op->getNumResults());
-    for (auto result : llvm::enumerate(op->getResults())) {
+    for (const auto &result : llvm::enumerate(op->getResults())) {
       replacements[result.index()] =
           tileAndFuseResult->replacements.lookup(result.value());
     }