[Mlir-commits] [mlir] fe56f5c - [mlir][Pass] Fix crash when applying a pass to an optional interface (#169262)

[llvmlistbot at llvm.org]

Author: Matthias Springer
Date: 2025-11-24T10:57:04+09:00
New Revision: fe56f5c3d315bf3282a54a3b323cc462ce755136

URL: https://github.com/llvm/llvm-project/commit/fe56f5c3d315bf3282a54a3b323cc462ce755136
DIFF: https://github.com/llvm/llvm-project/commit/fe56f5c3d315bf3282a54a3b323cc462ce755136.diff

LOG: [mlir][Pass] Fix crash when applying a pass to an optional interface (#169262)

Interfaces can be optional: whether an op implements an interface or not
can depend on the state of the operation.

```
// An optional code block for adding additional "classof" logic. This can
// be used to better enable "optional" interfaces, where an entity only
// implements the interface if some dynamic characteristic holds.
// `$_attr`/`$_op`/`$_type` may be used to refer to an instance of the
// interface instance being checked.
code extraClassOf = "";
```

The current `Pass::canScheduleOn(RegisteredOperationName)` is
insufficient. This commit adds an additional overload to inspect
`Operation *`.

This commit fixes a crash when scheduling an `InterfacePass` for an
optional interface on an operation that does not actually implement the
interface.

This is a re-upload of #168499, which was reverted.

Added: 
    mlir/test/Pass/invalid-unsupported-operation.mlir

Modified: 
    mlir/include/mlir/Pass/Pass.h
    mlir/lib/Pass/Pass.cpp
    mlir/test/Dialect/Transform/test-pass-application.mlir
    mlir/test/Pass/pipeline-invalid.mlir

Removed: 
    


################################################################################
diff  --git a/mlir/include/mlir/Pass/Pass.h b/mlir/include/mlir/Pass/Pass.h
index 16893c6db87b1..448a688243491 100644
--- a/mlir/include/mlir/Pass/Pass.h
+++ b/mlir/include/mlir/Pass/Pass.h
@@ -193,6 +193,13 @@ class Pass {
   /// This is useful for generic operation passes to add restrictions on the
   /// operations they operate on.
   virtual bool canScheduleOn(RegisteredOperationName opName) const = 0;
+  virtual bool canScheduleOn(Operation *op) const {
+    std::optional<RegisteredOperationName> registeredInfo =
+        op->getName().getRegisteredInfo();
+    if (!registeredInfo)
+      return false;
+    return canScheduleOn(*registeredInfo);
+  }
 
   /// Schedule an arbitrary pass pipeline on the provided operation.
   /// This can be invoke any time in a pass to dynamic schedule more passes.
@@ -436,6 +443,7 @@ class InterfacePass : public OperationPass<> {
   /// Indicate if the current pass can be scheduled on the given operation type.
   /// For an InterfacePass, this checks if the operation implements the given
   /// interface.
+  bool canScheduleOn(Operation *op) const final { return isa<InterfaceT>(op); }
   bool canScheduleOn(RegisteredOperationName opName) const final {
     return opName.hasInterface<InterfaceT>();
   }

diff  --git a/mlir/lib/Pass/Pass.cpp b/mlir/lib/Pass/Pass.cpp
index 521c7c6be17b6..75f882606e0ab 100644
--- a/mlir/lib/Pass/Pass.cpp
+++ b/mlir/lib/Pass/Pass.cpp
@@ -559,9 +559,9 @@ LogicalResult OpToOpPassAdaptor::run(Pass *pass, Operation *op,
     return op->emitOpError() << "trying to schedule a pass on an operation not "
                                 "marked as 'IsolatedFromAbove'";
   }
-  if (!pass->canScheduleOn(*op->getName().getRegisteredInfo())) {
-    return op->emitOpError()
-           << "trying to schedule a pass on an unsupported operation";
+  if (!pass->canScheduleOn(op)) {
+    return op->emitOpError() << "trying to schedule pass '" << pass->getName()
+                             << "' on an unsupported operation";
   }
 
   // Initialize the pass state with a callback for the pass to dynamically

diff  --git a/mlir/test/Dialect/Transform/test-pass-application.mlir b/mlir/test/Dialect/Transform/test-pass-application.mlir
index ce8f69c58701d..4806daf7ce73f 100644
--- a/mlir/test/Dialect/Transform/test-pass-application.mlir
+++ b/mlir/test/Dialect/Transform/test-pass-application.mlir
@@ -386,7 +386,7 @@ module attributes {transform.with_named_sequence} {
 // -----
 
 module attributes {transform.with_named_sequence} {
-  // expected-error @below {{trying to schedule a pass on an unsupported operation}}
+  // expected-error @below {{trying to schedule pass 'DuplicateFunctionEliminationPass' on an unsupported operation}}
   // expected-note @below {{target op}}
   func.func @invalid_target_op_type() {
     return

diff  --git a/mlir/test/Pass/invalid-unsupported-operation.mlir b/mlir/test/Pass/invalid-unsupported-operation.mlir
new file mode 100644
index 0000000000000..1ee458412f924
--- /dev/null
+++ b/mlir/test/Pass/invalid-unsupported-operation.mlir
@@ -0,0 +1,10 @@
+// RUN: mlir-opt %s -test-print-liveness -split-input-file -verify-diagnostics
+
+// Unnamed modules do not implement SymbolOpInterface.
+// expected-error-re @+1 {{trying to schedule pass '{{.*}}TestLivenessPass' on an unsupported operation}}
+module {}
+
+// -----
+
+// Named modules implement SymbolOpInterface.
+module @named_module {}

diff  --git a/mlir/test/Pass/pipeline-invalid.mlir b/mlir/test/Pass/pipeline-invalid.mlir
index 948a13384bc75..bff2b1c1ea5bf 100644
--- a/mlir/test/Pass/pipeline-invalid.mlir
+++ b/mlir/test/Pass/pipeline-invalid.mlir
@@ -15,5 +15,5 @@ arith.constant 0
 
 // -----
 
-// expected-error at below {{trying to schedule a pass on an unsupported operation}}
+// expected-error-re at below {{trying to schedule pass '{{.*}}TestFunctionPass' on an unsupported operation}}
 module {}