[llvm] [mlir][transform] LISH: Add transform op (PR #70630)

[Matthias Springer via llvm-commits]

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@@ -1395,6 +1395,26 @@ transform::GetTypeOp::apply(transform::TransformRewriter &rewriter,
   return DiagnosedSilenceableFailure::success();
 }
 
+//===----------------------------------------------------------------------===//
+// HoistLoopInvariantSubsetsOp
+//===----------------------------------------------------------------------===//
+
+DiagnosedSilenceableFailure transform::HoistLoopInvariantSubsetsOp::applyToOne(
+    transform::TransformRewriter &rewriter, Operation *target,
+    transform::ApplyToEachResultList &results,
+    transform::TransformState &state) {
+  target->walk([&](LoopLikeOpInterface loopLike) {
+    (void)hoistLoopInvariantSubsets(rewriter, loopLike);
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matthias-springer wrote:

`hoistLoopInvariantSubsets` returns a `LoopLikeOpInterface` op. In case nothing was hoisted, the same op is returned. That does not necessarily mean that something went wrong, it could just be that there was nothing to hoist. (There is currently no failure that can happen.)

https://github.com/llvm/llvm-project/pull/70630