src/librustc_trans/cabi_wasm32.rs

// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use abi::{FnType, ArgType};
use context::CodegenCx;

fn classify_ret_ty<'a, 'tcx>(_cx: &CodegenCx<'a, 'tcx>, ret: &mut ArgType<'tcx>) {
    ret.extend_integer_width_to(32);
}

fn classify_arg_ty(arg: &mut ArgType) {
    arg.extend_integer_width_to(32);
}

pub fn compute_abi_info<'a, 'tcx>(cx: &CodegenCx<'a, 'tcx>, fty: &mut FnType<'tcx>) {
    if !fty.ret.is_ignore() {
        classify_ret_ty(cx, &mut fty.ret);
    }

    for arg in &mut fty.args {
        if arg.is_ignore() { continue; }
        classify_arg_ty(arg);
    }
}