About

It is desirable to have a common syntax across LLVM and GCC to allow developers to specify target code generation options via an attribute on a per-function basis.  So for example this would allow a developer to specify that a particular function should be compiled with the `V' extension.  This support is also a prerequisite for supporting function multiversioning.  Given the dependencies on this feature it's considered high priority to get it landed in GCC 14 and LLVM 18.

Stakeholders/Partners

RISE:

SiFive:  Kito Cheng (specification and GCC implementation).

SiFive: Piyou Chen (LLVM implementation)

Dependencies

Status

Updates

11 Jul 2024 

• Marking complete. A separate project has been created for function_multiversioning.

12 Apr 2024 

• Moved to 1H24 as work is still in progress.
• attribute(target) is supported in LLVM 18.
• target_clones support is in progess https://github.com/llvm/llvm-project/pull/85786

10 Oct 2023  

• Project reported as priority for 2H23