diff --git a/mlir/lib/Transforms/Utils/GreedyPatternRewriteDriver.cpp b/mlir/lib/Transforms/Utils/GreedyPatternRewriteDriver.cpp
--- a/mlir/lib/Transforms/Utils/GreedyPatternRewriteDriver.cpp
+++ b/mlir/lib/Transforms/Utils/GreedyPatternRewriteDriver.cpp
@@ -299,13 +299,15 @@
 LogicalResult OpPatternRewriteDriver::simplifyLocally(Operation *op,
                                                       int maxIterations,
                                                       bool &erased) {
-  bool changed = false;
+  bool changed;
   erased = false;
   opErasedViaPatternRewrites = false;
   int i = 0;
   // Iterate until convergence or until maxIterations. Deletion of the op as
   // a result of being dead or folded is convergence.
   do {
+    changed = false;
+
     // If the operation is trivially dead - remove it.
     if (isOpTriviallyDead(op)) {
       op->erase();