[Mlir-commits] [mlir] [mlir][SparseTensor][NFC] Remove `isNestedIn` helper function (PR #75729)

[llvmlistbot at llvm.org]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-mlir

Author: Matthias Springer (matthias-springer)

<details>
<summary>Changes</summary>

Use `Region::findAncestorBlockInRegion` instead of a custom IR traversal.

---
Full diff: https://github.com/llvm/llvm-project/pull/75729.diff


1 Files Affected:

- (modified) mlir/lib/Dialect/SparseTensor/Transforms/SparseGPUCodegen.cpp (+1-10) 


``````````diff
diff --git a/mlir/lib/Dialect/SparseTensor/Transforms/SparseGPUCodegen.cpp b/mlir/lib/Dialect/SparseTensor/Transforms/SparseGPUCodegen.cpp
index 30ab2a1f18e3f7..69fd1eb746ffe7 100644
--- a/mlir/lib/Dialect/SparseTensor/Transforms/SparseGPUCodegen.cpp
+++ b/mlir/lib/Dialect/SparseTensor/Transforms/SparseGPUCodegen.cpp
@@ -1155,7 +1155,7 @@ struct ForallRewriter : public OpRewritePattern<scf::ParallelOp> {
           block = arg.getOwner();
         else
           block = val.getDefiningOp()->getBlock();
-        if (!isNestedIn(block, forallOp))
+        if (!forallOp.getRegion().findAncestorBlockInRegion(*block))
           invariants.insert(val);
       }
     });
@@ -1208,15 +1208,6 @@ struct ForallRewriter : public OpRewritePattern<scf::ParallelOp> {
   }
 
 private:
-  // Helper method to see if block appears in given loop.
-  static bool isNestedIn(Block *block, scf::ParallelOp forallOp) {
-    for (Operation *o = block->getParentOp(); o; o = o->getParentOp()) {
-      if (o == forallOp)
-        return true;
-    }
-    return false;
-  }
-
   unsigned numThreads;
 };
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/75729