[libcxx-commits] [libcxx] 4fad93b - [libc++] Use _LIBCPP_NO_UNIQUE_ADDRESS for the new vector layout (#207149)

[via libcxx-commits]

Author: Nikolas Klauser
Date: 2026-07-03T04:22:45+02:00
New Revision: 4fad93b912c954720de1b2b63a0f00679dc96550

URL: https://github.com/llvm/llvm-project/commit/4fad93b912c954720de1b2b63a0f00679dc96550
DIFF: https://github.com/llvm/llvm-project/commit/4fad93b912c954720de1b2b63a0f00679dc96550.diff

LOG: [libc++] Use _LIBCPP_NO_UNIQUE_ADDRESS for the new vector layout (#207149)

We use `_LIBCPP_NO_UNIQUE_ADDRESS`, since a plain
`[[no_unique_address]]` doesn't work on Windows.

Added: 
    

Modified: 
    libcxx/include/__vector/layout.h

Removed: 
    


################################################################################
diff  --git a/libcxx/include/__vector/layout.h b/libcxx/include/__vector/layout.h
index 65d11aa238df0..910078b1e760e 100644
--- a/libcxx/include/__vector/layout.h
+++ b/libcxx/include/__vector/layout.h
@@ -217,7 +217,7 @@ class __vector_layout {
 #ifdef _LIBCPP_ABI_VECTOR_LAYOUT_SIZE_BASED
   size_type __size_     = 0;
   size_type __capacity_ = 0;
-  [[no_unique_address]] allocator_type __alloc_;
+  _LIBCPP_NO_UNIQUE_ADDRESS allocator_type __alloc_;
 #else
   pointer __end_ = nullptr;
   _LIBCPP_COMPRESSED_PAIR(pointer, __capacity_ = nullptr, allocator_type, __alloc_);