Function generate_gv

cranelift/codegen/src/machinst/abi.rs:1422–1455

(
    f: &ir::Function,
    sigs: &SigSet,
    sig: Sig,
    gv: ir::GlobalValue,
    insts: &mut SmallInstVec<M::I>,
)

}

fn generate_gv<M: ABIMachineSpec>(
    f: &ir::Function,
    sigs: &SigSet,
    sig: Sig,
    gv: ir::GlobalValue,
    insts: &mut SmallInstVec<M::I>,
) -> Reg {
    match f.global_values[gv] {
        // Return the direct register the vmcontext is in
        ir::GlobalValueData::VMContext => {
            get_special_purpose_param_register(f, sigs, sig, ir::ArgumentPurpose::VMContext)
                .expect("no vmcontext parameter found")
        }
        // Load our base value into a register, then load from that register
        // in to a temporary register.
        ir::GlobalValueData::Load {
            base,
            offset,
            global_type: _,
            flags: _,
        } => {
            let base = generate_gv::<M>(f, sigs, sig, base, insts);
            let into_reg = Writable::from_reg(M::get_stacklimit_reg(f.stencil.signature.call_conv));
            insts.push(M::gen_load_base_offset(
                into_reg,
                base,
                offset.into(),
                M::word_type(),
            ));
            return into_reg.to_reg();
        }
        ref other => panic!("global value for stack limit not supported: {other}"),
    }
}

/// Returns true if the signature needs to be legalized.
fn missing_struct_return(sig: &ir::Signature) -> bool {