Function calls

crates/rustc_codegen_spirv/src/linker/inline.rs:261–272

(
        func: &'a Function,
        func_to_index: &'a FxHashMap<Word, usize>,
    )

    }

    fn calls<'a>(
        func: &'a Function,
        func_to_index: &'a FxHashMap<Word, usize>,
    ) -> impl Iterator<Item = usize> + 'a {
        func.all_inst_iter()
            .filter(|inst| inst.class.opcode == Op::FunctionCall)
            .map(move |inst| {
                *func_to_index
                    .get(&inst.operands[0].id_ref_any().unwrap())
                    .unwrap()
            })
    }

    match has_recursion {
        Some(err) => Err(err),