[clang] [llvm] [BPF] Support Stack Arguments (PR #189060)

[via cfe-commits]

4ast wrote:

> > if JIT did 'sp -=' just before the call then it's broken. The code cannot store into sp - X before sp -=, since IRQ will corrupt it. Hence my earlier point that JIT has to insert 'sp -=' before the actual stores.
> 
> Ya. I should clarify. 'before the call' is not precise. The extra stack is allocated before the main loop (going through all insns). So we should be okay.

so what are you saying? yes or no to explicit r12 adjustment?

https://github.com/llvm/llvm-project/pull/189060