[mlir] [clang] [llvm] [clang-tools-extra] [mlir][TilingInterface] Early return cloned ops if tile sizes are zeros. (PR #75410)

[via cfe-commits]

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@@ -362,14 +362,20 @@ mlir::scf::tileUsingSCFForOp(RewriterBase &rewriter, TilingInterface op,
   auto clonedOp = cast<TilingInterface>(
       cloneOpAndUpdateDestinationArgs(rewriter, op, clonedOpDestination));
 
-  // 5b. Tile the cloned operation.
+  // 5b. Early return cloned op if tiling is not happening.
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MaheshRavishankar wrote:

Yeah, can't replace an op with itself. In theory you could say the caller should check for this and not do the replace, but that is strange. Let's go with this.

https://github.com/llvm/llvm-project/pull/75410