compiler/rustc_target/src/spec/arm_base.rs

use crate::spec::abi::Abi;

// All the calling conventions trigger an assertion(Unsupported calling convention) in llvm on arm
pub fn unsupported_abis() -> Vec<Abi> {
    vec![Abi::Stdcall, Abi::Fastcall, Abi::Vectorcall, Abi::Thiscall, Abi::Win64, Abi::SysV64]
}