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Issue created by Administrator@rootContributor2 of 5 checklist items completed2/5 checklist items

Finish AArch64 clean call inlining optimization

Created by: fhahn

#2498 adds initial clean call inlining for AArch64, but there are a couple of FIXMEs that still need to be addressed in core/arch/aarch64/clean_call_opt.c

I am splitting this off #1621 (closed) to make it easier to keep track of the remaining FIXMEs:

  • Analyze arithmetic flags usage in analyze_callee_saved_regs
  • Save & restore arithmetic flags in insert_inline_reg_save/restore
  • implement analyze_clean_call_aflags
  • implement check_callee_instr_level2.
  • implement re-writing of access to SP and X29 when inlining in check_callee_ilist_inline.

Most of those FIXMEs are quite self-contained and could be a good starting point for people interested in contributing to the AArch64 backend. I am happy to provide help & guidance, if anyone is interested in picking up FIXMEs from the list.