[llvm] [ADT] Use llvm::has_single_bit (NFC) (PR #146219)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-adt

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/146219.diff


1 Files Affected:

- (modified) llvm/include/llvm/ADT/SmallPtrSet.h (+1-1) 


``````````diff
diff --git a/llvm/include/llvm/ADT/SmallPtrSet.h b/llvm/include/llvm/ADT/SmallPtrSet.h
index 2ce934321c456..892040ef4cab1 100644
--- a/llvm/include/llvm/ADT/SmallPtrSet.h
+++ b/llvm/include/llvm/ADT/SmallPtrSet.h
@@ -80,7 +80,7 @@ class SmallPtrSetImplBase : public DebugEpochBase {
   explicit SmallPtrSetImplBase(const void **SmallStorage, unsigned SmallSize)
       : CurArray(SmallStorage), CurArraySize(SmallSize), NumNonEmpty(0),
         NumTombstones(0), IsSmall(true) {
-    assert(SmallSize && (SmallSize & (SmallSize-1)) == 0 &&
+    assert(llvm::has_single_bit(SmallSize) &&
            "Initial size must be a power of two!");
   }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/146219