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

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yonghong-song 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.



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