[mlir][IR] Fix build error with gcc-7

[matthias-springer]

Fix build after #156825.

[llvmbot]

@llvm/pr-subscribers-mlir

@llvm/pr-subscribers-mlir-core

Author: Matthias Springer (matthias-springer)

Changes

Fix build after #156825.

---

Full diff: https://github.com/llvm/llvm-project/pull/158305.diff

1 Files Affected:

• (modified) mlir/lib/IR/Remarks.cpp (+1-1)

diff --git a/mlir/lib/IR/Remarks.cpp b/mlir/lib/IR/Remarks.cpp
index 29088bd360e23..a55f61aff77bb 100644
--- a/mlir/lib/IR/Remarks.cpp
+++ b/mlir/lib/IR/Remarks.cpp
@@ -284,7 +284,7 @@ buildFilter(const mlir::remark::RemarkCategories &cats,
   if (!rx.isValid(err))
     return std::nullopt;
 
-  return rx;
+  return std::make_optional<llvm::Regex>(std::move(rx));
 }
 
 RemarkEngine::RemarkEngine(bool printAsEmitRemarks,