[Mlir-commits] [mlir] c949a97 - [mlir] Fold operation trait lookup without a temporary array (NFC) (#226081)

[llvmlistbot at llvm.org]

Author: Mehdi Amini
Date: 2026-09-24T09:28:52Z
New Revision: c949a973db32c7bc80bed6a38057912fea41ddc3

URL: https://github.com/llvm/llvm-project/commit/c949a973db32c7bc80bed6a38057912fea41ddc3
DIFF: https://github.com/llvm/llvm-project/commit/c949a973db32c7bc80bed6a38057912fea41ddc3.diff

LOG: [mlir] Fold operation trait lookup without a temporary array (NFC) (#226081)

Compare trait IDs directly in the generated pack expansion. This avoids
building and scanning a local array in every operation trait lookup.

Assisted-by: Codex

Added: 
    

Modified: 
    mlir/include/mlir/IR/OpDefinition.h

Removed: 
    


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diff  --git a/mlir/include/mlir/IR/OpDefinition.h b/mlir/include/mlir/IR/OpDefinition.h
index 4741eecb4a874..36bff607c2a69 100644
--- a/mlir/include/mlir/IR/OpDefinition.h
+++ b/mlir/include/mlir/IR/OpDefinition.h
@@ -1567,11 +1567,7 @@ namespace op_definition_impl {
 /// trait types `Traits`.
 template <template <typename T> class... Traits>
 inline bool hasTrait(TypeID traitID) {
-  TypeID traitIDs[] = {TypeID::get<Traits>()...};
-  for (unsigned i = 0, e = sizeof...(Traits); i != e; ++i)
-    if (traitIDs[i] == traitID)
-      return true;
-  return false;
+  return ((traitID == TypeID::get<Traits>()) || ...);
 }
 template <>
 inline bool hasTrait<>(TypeID traitID) {