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

[Han-Chung Wang via cfe-commits]

================
@@ -362,14 +362,21 @@ 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 happenning.
+  if (llvm::all_of(tileSizeVector,
+                   [](OpFoldResult v) { return isZeroIndex(v); })) {
----------------
hanhanW wrote:

Really good point! 

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