Description

Hello!

There are 3 args in source code for this function but the disassembly and decompiled code has 6.

some observations:

• Callsite facts.args returns 4 registers rdi, rsi, rdx, rcx

• Variable manager seems to return rdi, rsi, rdx, and r9 as accessed registers but r9 doesn't seem to be used in disassembly
  and then _redorder_args update the argument list from rdi to r9 making it 6.
  I think by fixing r9 we can get the number down to 4 from 6.

https://github.com/angr/angr/blob/master/angr/analyses/calling_convention.py#L713

https://github.com/angr/angr/blob/master/angr/analyses/calling_convention.py#L340

csplit binary: binaries.zip

Steps to reproduce the bug

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Environment

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Additional context

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