[mlir] Use llvm::bit_width (NFC)

[kazutakahirata]

Note that bit_width is implemented as:

std::numeric_limits::digits - llvm::countl_zero(Value);

[llvmbot]

@llvm/pr-subscribers-mlir-sparse

@llvm/pr-subscribers-mlir

Author: Kazu Hirata (kazutakahirata)

Changes

Note that bit_width is implemented as:

std::numeric_limits<T>::digits - llvm::countl_zero(Value);

---

Full diff: https://github.com/llvm/llvm-project/pull/138648.diff

1 Files Affected:

• (modified) mlir/include/mlir/Dialect/SparseTensor/IR/SparseTensor.h (+1-1)

diff --git a/mlir/include/mlir/Dialect/SparseTensor/IR/SparseTensor.h b/mlir/include/mlir/Dialect/SparseTensor/IR/SparseTensor.h
index fca2629d72efc..d0a3f01afe871 100644
--- a/mlir/include/mlir/Dialect/SparseTensor/IR/SparseTensor.h
+++ b/mlir/include/mlir/Dialect/SparseTensor/IR/SparseTensor.h
@@ -122,7 +122,7 @@ class I64BitSet {
     unsigned m = llvm::countr_zero(storage);
     return m == 64 ? -1 : m;
   }
-  unsigned max() const { return 64 - llvm::countl_zero(storage); }
+  unsigned max() const { return llvm::bit_width(storage); }
   unsigned count() const { return llvm::popcount(storage); }
   bool empty() const { return storage == 0; }
 };