[mlir][arith] Delete unnecessary error logs

[cxy-1993]

Function getNeutralElement already indicates "cannot find neutral element" by returning nullptr through the return value, and no additional error log needs to be output.

[llvmbot]

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@llvm/pr-subscribers-mlir-arith

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Author: donald chen (cxy-1993)

Changes

Function getNeutralElement already indicates "cannot find neutral element" by returning nullptr through the return value, and no additional error log needs to be output.

---

Full diff: https://github.com/llvm/llvm-project/pull/94970.diff

1 Files Affected:

• (modified) mlir/lib/Dialect/Arith/IR/ArithOps.cpp (-1)

diff --git a/mlir/lib/Dialect/Arith/IR/ArithOps.cpp b/mlir/lib/Dialect/Arith/IR/ArithOps.cpp
index 5797c5681a5fd..2f6647a2a27b1 100644
--- a/mlir/lib/Dialect/Arith/IR/ArithOps.cpp
+++ b/mlir/lib/Dialect/Arith/IR/ArithOps.cpp
@@ -2544,7 +2544,6 @@ std::optional<TypedAttr> mlir::arith::getNeutralElement(Operation *op) {
           .Case([](arith::MulIOp op) { return AtomicRMWKind::muli; })
           .Default([](Operation *op) { return std::nullopt; });
   if (!maybeKind) {
-    op->emitError() << "Unknown neutral element for: " << *op;
     return std::nullopt;
   }