[Mlir-commits] [mlir] [mlir][Func] Preserve attribute when converting CallOp/ReturnOp signature (PR #127772)

[Mehdi Amini]

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@@ -126,8 +127,9 @@ class ReturnOpTypeConversion : public OpConversionPattern<ReturnOp> {
   LogicalResult
   matchAndRewrite(ReturnOp op, OneToNOpAdaptor adaptor,
                   ConversionPatternRewriter &rewriter) const final {
-    rewriter.replaceOpWithNewOp<ReturnOp>(op,
-                                          flattenValues(adaptor.getOperands()));
+    rewriter
+        .replaceOpWithNewOp<ReturnOp>(op, flattenValues(adaptor.getOperands()))
+        ->setAttrs(op->getAttrs());
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joker-eph wrote:

> Or more conversatively we can preserve some dialect attribute?

"dialect attributes" are just a different way to say "discardable attributes" I believe. The API you mention don't exist, it is called `setDiscardableAttrs()` in the codebase.



https://github.com/llvm/llvm-project/pull/127772