blob: 733a7328bd3a005648d99cf26006cfaa23c335c4 [file] [log] [blame]
use crate::abi::call::{ArgAbi, FnAbi, Reg, Uniform};
use crate::abi::{HasDataLayout, LayoutOf, Size, TyAndLayoutMethods};
fn classify_ret<'a, Ty, C>(cx: &C, ret: &mut ArgAbi<'_, Ty>, offset: &mut Size)
where
Ty: TyAndLayoutMethods<'a, C>,
C: LayoutOf<Ty = Ty> + HasDataLayout,
{
if !ret.layout.is_aggregate() {
ret.extend_integer_width_to(32);
} else {
ret.make_indirect();
*offset += cx.data_layout().pointer_size;
}
}
fn classify_arg<'a, Ty, C>(cx: &C, arg: &mut ArgAbi<'_, Ty>, offset: &mut Size)
where
Ty: TyAndLayoutMethods<'a, C>,
C: LayoutOf<Ty = Ty> + HasDataLayout,
{
let dl = cx.data_layout();
let size = arg.layout.size;
let align = arg.layout.align.max(dl.i32_align).min(dl.i64_align).abi;
if arg.layout.is_aggregate() {
arg.cast_to(Uniform { unit: Reg::i32(), total: size });
if !offset.is_aligned(align) {
arg.pad_with(Reg::i32());
}
} else {
arg.extend_integer_width_to(32);
}
*offset = offset.align_to(align) + size.align_to(align);
}
pub fn compute_abi_info<'a, Ty, C>(cx: &C, fn_abi: &mut FnAbi<'_, Ty>)
where
Ty: TyAndLayoutMethods<'a, C>,
C: LayoutOf<Ty = Ty> + HasDataLayout,
{
let mut offset = Size::ZERO;
if !fn_abi.ret.is_ignore() {
classify_ret(cx, &mut fn_abi.ret, &mut offset);
}
for arg in &mut fn_abi.args {
if arg.is_ignore() {
continue;
}
classify_arg(cx, arg, &mut offset);
}
}