[mlir] Optimize getting properties on concrete ops

[Mogball]

This makes retrieving properties on concrete operations faster by removing a branch when it is known that the operation must have properties.

[llvmbot]

@llvm/pr-subscribers-mlir-core

@llvm/pr-subscribers-mlir

Author: Jeff Niu (Mogball)

Changes

This makes retrieving properties on concrete operations faster by removing a branch when it is known that the operation must have properties.

---

Full diff: https://github.com/llvm/llvm-project/pull/88259.diff

2 Files Affected:

• (modified) mlir/include/mlir/IR/OpDefinition.h (+1-1)
• (modified) mlir/include/mlir/IR/Operation.h (+7-2)

diff --git a/mlir/include/mlir/IR/OpDefinition.h b/mlir/include/mlir/IR/OpDefinition.h
index c177ae3594d11f..2d1dee2303e8f0 100644
--- a/mlir/include/mlir/IR/OpDefinition.h
+++ b/mlir/include/mlir/IR/OpDefinition.h
@@ -1965,7 +1965,7 @@ class Op : public OpState, public Traits<ConcreteType>... {
     if constexpr (!hasProperties())
       return getEmptyProperties();
     return *getOperation()
-                ->getPropertiesStorage()
+                ->getPropertiesStorageUnsafe()
                 .template as<InferredProperties<T> *>();
   }
 
diff --git a/mlir/include/mlir/IR/Operation.h b/mlir/include/mlir/IR/Operation.h
index 3ffd3517fe5a66..c52a6fcac10c1c 100644
--- a/mlir/include/mlir/IR/Operation.h
+++ b/mlir/include/mlir/IR/Operation.h
@@ -895,8 +895,7 @@ class alignas(8) Operation final
   /// Returns the properties storage.
   OpaqueProperties getPropertiesStorage() {
     if (propertiesStorageSize)
-      return {
-          reinterpret_cast<void *>(getTrailingObjects<detail::OpProperties>())};
+      return getPropertiesStorageUnsafe();
     return {nullptr};
   }
   OpaqueProperties getPropertiesStorage() const {
@@ -905,6 +904,12 @@ class alignas(8) Operation final
           getTrailingObjects<detail::OpProperties>()))};
     return {nullptr};
   }
+  /// Returns the properties storage without checking whether properties are
+  /// present.
+  OpaqueProperties getPropertiesStorageUnsafe() {
+    return {
+        reinterpret_cast<void *>(getTrailingObjects<detail::OpProperties>())};
+  }
 
   /// Return the properties converted to an attribute.
   /// This is expensive, and mostly useful when dealing with unregistered

[joker-eph]

Nice!