[clang] [llvm] [ARM] Fix musttail calls (PR #109943)

[Oliver Stannard via cfe-commits]

ostannard wrote:

Merged:
376d7b27fa3d [ARM] Optimise byval arguments in tail-calls
914a3990d1a0 [ARM] Avoid clobbering byval arguments when passing to tail-calls
a96c14eeb8fc [Clang] Always forward sret parameters to musttail calls
78ec2e2ed5e3 [ARM] Allow tail calls with byval args
82e64721974b [ARM] Allow functions with sret returns to be tail-called
c1eb790cd2f2 [ARM] Tail-calls do not require caller and callee arguments to match
246baeb5fe7d [ARM] Add debug trace for tail-call optimisation
8e289e4fa60e [ARM] Fix comment typo
e3f218096ca3 [ARM] Re-generate a test

https://github.com/llvm/llvm-project/pull/109943