[llvm] [AArch64] Switch to soft promoting half types. (PR #80576)

[David Sherwood via llvm-commits]

david-arm wrote:

> Hi David, this is not intended to be an ABI change; code compiled with old and new Clang should be fully interoperable (provided, of course, neither or both are using `-mgeneral-regs-only`). If you tested it and found that it did change ABI, I did something wrong, and in that case I would appreciate it if you could share details so that I can fix that.

Ah sorry, my bad! I'm not sure why I thought it was an ABI break. Looking at how your patch changes the tests I see now it doesn't look like it. However, is this something still worth mentioning in release notes somewhere?


https://github.com/llvm/llvm-project/pull/80576