[llvm-branch-commits] [libcxx] release/18.x: [libcxx] Align `__recommend() + 1` by __endian_factor (#90292) (PR #95264)

[via llvm-branch-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libcxx

Author: None (llvmbot)

<details>
<summary>Changes</summary>

Backport 382f70a877f0 d129ea8d2fa3

Requested by: @<!-- -->DimitryAndric

---
Full diff: https://github.com/llvm/llvm-project/pull/95264.diff


1 Files Affected:

- (modified) libcxx/include/string (+3-3) 


``````````diff
diff --git a/libcxx/include/string b/libcxx/include/string
index ba169c3dbfc9e..56e2ef09947f4 100644
--- a/libcxx/include/string
+++ b/libcxx/include/string
@@ -1943,10 +1943,10 @@ private:
     if (__s < __min_cap) {
       return static_cast<size_type>(__min_cap) - 1;
     }
-    size_type __guess =
-        __align_it < sizeof(value_type) < __alignment ? __alignment / sizeof(value_type) : 1 > (__s + 1) - 1;
+    const size_type __boundary = sizeof(value_type) < __alignment ? __alignment / sizeof(value_type) : __endian_factor;
+    size_type __guess          = __align_it<__boundary>(__s + 1) - 1;
     if (__guess == __min_cap)
-      ++__guess;
+      __guess += __endian_factor;
     return __guess;
   }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/95264