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#![allow(non_upper_case_globals)]
use llvm::{Struct, Array};
use abi::{FnType, ArgType, ArgAttribute};
use context::CrateContext;
fn classify_ret_ty(ccx: &CrateContext, ret: &mut ArgType) {
match ret.ty.kind() {
Struct => {
let field_types = ret.ty.field_types();
if field_types.len() == 1 {
ret.cast = Some(field_types[0]);
} else {
ret.make_indirect(ccx);
}
}
Array => {
ret.make_indirect(ccx);
}
_ => {}
}
}
fn classify_arg_ty(ccx: &CrateContext, arg: &mut ArgType) {
if arg.ty.is_aggregate() {
arg.make_indirect(ccx);
arg.attrs.set(ArgAttribute::ByVal);
}
}
pub fn compute_abi_info(ccx: &CrateContext, fty: &mut FnType) {
if !fty.ret.is_ignore() {
classify_ret_ty(ccx, &mut fty.ret);
}
for arg in &mut fty.args {
if arg.is_ignore() { continue; }
classify_arg_ty(ccx, arg);
}
}