llvm-project.git/libc/src/stdlib/gpu/aligned_alloc.cpp, branch users/nico/python-2 Unnamed repository; edit this file 'description' to name the repository. [libc] Efficiently implement `aligned_alloc` for AMDGPU (#146585) 2025-07-02T14:25:57+00:00 Joseph Huber huberjn@outlook.com 2025-07-02T14:25:57+00:00 24828c8c45d7f258159afca251aa853a5fc59150 Summary: This patch uses the actual allocator interface to implement `aligned_alloc`. We do this by simply rounding up the amount allocated. Because of how index calculation works, any offset within an allocated pointer will still map to the same chunk, so we can just adjust internally and it will free all the same. 
Summary:
This patch uses the actual allocator interface to implement
`aligned_alloc`. We do this by simply rounding up the amount allocated.
Because of how index calculation works, any offset within an allocated
pointer will still map to the same chunk, so we can just adjust
internally and it will free all the same.
 [libc] Implement placeholder memory functions on the GPU (#101082) 2024-07-30T15:15:30+00:00 Joseph Huber huberjn@outlook.com 2024-07-30T15:15:30+00:00 bf42a7860a208439a0a29f5dcc7a33949c484efb Summary: These functions are needed for `libc++` to link successfully. We can't implement them well currently, so simply provide some stand-in implementations. `realloc` will currently copy garbage and potentially fault and `aligned_alloc` will work unless your alignment is more than 4K alignment. However, these should work in practice to get tests running. I will write a real allocator soon™. 
Summary:
These functions are needed for `libc++` to link successfully. We can't
implement them well currently, so simply provide some stand-in
implementations. `realloc` will currently copy garbage and potentially
fault and `aligned_alloc` will work unless your alignment is more than
4K alignment. However, these should work in practice to get tests
running. I will write a real allocator soon™.