Fix "set-but-unused" warning in DialectConversion

The variable in question is only used in an assertion,
leading to a warning in opt builds.

PiperOrigin-RevId: 276352259

diff --git a/mlir/lib/Transforms/DialectConversion.cpp b/mlir/lib/Transforms/DialectConversion.cpp
index e82100c..776dfb4 100644 (file)
--- a/mlir/lib/Transforms/DialectConversion.cpp
+++ b/mlir/lib/Transforms/DialectConversion.cpp
@@ -1022,6 +1022,7 @@ OperationLegalizer::legalizePattern(Operation *op, RewritePattern *pattern,
       rewriterImpl.deadOps.insert(replacedOp);
   }
   assert(replacedRoot && "expected pattern to replace the root operation");
+  (void)replacedRoot;
 
   // Recursively legalize each of the new operations.
   for (unsigned i = curState.numCreatedOperations,