[mlir][Linalg] NFC: Expose a method to deduplicate operands/remove dead results of linalg.generic op. (#125141)

This functionality was wrapped within a pattern. Expose this as a
separate transformations function that can be used outside of pattern
rewrite mechanism.

---------

Signed-off-by: MaheshRavishankar <[email protected]>

Author: MaheshRavishankar

mlir/include/mlir/Dialect/Linalg/Transforms/Transforms.h

@@ -1395,6 +1395,14 @@ FailureOr<Operation *>
 decomposeWinogradOutputTransformOp(RewriterBase &rewriter,
                                    linalg::WinogradOutputTransformOp op);
 
+/// Method to deduplicate operands and remove dead results of `linalg.generic`
+/// operations. This is effectively DCE for a linalg.generic op. If there is
+/// deduplication of operands orremoval of results, replaces the `genericOp`
+/// with a new op and returns it. Returns the same operation if there is no
+/// deduplication/removal.
+FailureOr<linalg::GenericOp> deduplicateOperandsAndRemoveDeadResults(
+    RewriterBase &rewriter, linalg::GenericOp genericOp, bool removeOutputs);
+
 //===----------------------------------------------------------------------===//
 // Rewrite patterns wrapping transformations.
 // TODO: every single such pattern should be a close to noop wrapper around a
@@ -1786,7 +1794,7 @@ void populateDataLayoutPropagationPatterns(
     const ControlPropagationFn &controlPackUnPackPropagation);
 
 /// Pattern to remove dead operands and results of `linalg.generic` operations.
-/// This is effectively DCE for a linalg op.
+/// This is a pattern wrapper for `deduplicateOperandsAndRemoveDeadResults`.
 void populateEraseUnusedOperandsAndResultsPatterns(RewritePatternSet &patterns);
 
 /// Patterns to promote inputs to outputs and remove unused inputs of