diff --git a/mlir/lib/Dialect/Async/Transforms/AsyncToAsyncRuntime.cpp b/mlir/lib/Dialect/Async/Transforms/AsyncToAsyncRuntime.cpp
--- a/mlir/lib/Dialect/Async/Transforms/AsyncToAsyncRuntime.cpp
+++ b/mlir/lib/Dialect/Async/Transforms/AsyncToAsyncRuntime.cpp
@@ -687,7 +687,7 @@
     if (isAllowedToBlock(func) ||
         outlinedFunctions.find(func) == outlinedFunctions.end()) {
       for (Operation &op : func.getBody().getOps()) {
-        if (dyn_cast<AwaitOp>(op) || dyn_cast<AwaitAllOp>(op)) {
+        if (isa<AwaitOp, AwaitAllOp>(op)) {
           funcWorklist.push_back(func);
           break;
         }
diff --git a/mlir/lib/Dialect/Func/Transforms/FuncConversions.cpp b/mlir/lib/Dialect/Func/Transforms/FuncConversions.cpp
--- a/mlir/lib/Dialect/Func/Transforms/FuncConversions.cpp
+++ b/mlir/lib/Dialect/Func/Transforms/FuncConversions.cpp
@@ -143,7 +143,7 @@
   // If this is a `return` and the user pass wants to convert/transform across
   // function boundaries, then `converter` is invoked to check whether the the
   // `return` op is legal.
-  if (dyn_cast<ReturnOp>(op) && !returnOpAlwaysLegal)
+  if (isa<ReturnOp>(op) && !returnOpAlwaysLegal)
     return converter.isLegal(op);
 
   // ReturnLike operations have to be legalized with their parent. For
diff --git a/mlir/lib/Dialect/Linalg/Transforms/Detensorize.cpp b/mlir/lib/Dialect/Linalg/Transforms/Detensorize.cpp
--- a/mlir/lib/Dialect/Linalg/Transforms/Detensorize.cpp
+++ b/mlir/lib/Dialect/Linalg/Transforms/Detensorize.cpp
@@ -397,7 +397,7 @@
         // Note: No need to check whether the result type of this op is
         // detensorable since if it wasn't we wouldn't reach that point in the
         // work list.
-        if (dyn_cast<tensor::FromElementsOp>(currentItemDefiningOp))
+        if (isa<tensor::FromElementsOp>(currentItemDefiningOp))
           continue;
 
         // 2.4 - The current item is the result of a scalar op, add all its