use crate::abi::call::{ArgAbi, FnAbi, Reg, Uniform}; use crate::abi::{HasDataLayout, Size}; fn classify_ret(cx: &C, ret: &mut ArgAbi<'_, Ty>, offset: &mut Size) where C: 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(cx: &C, arg: &mut ArgAbi<'_, Ty>, offset: &mut Size) where C: 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() { let pad_i32 = !offset.is_aligned(align); arg.cast_to_and_pad_i32(Uniform { unit: Reg::i32(), total: size }, pad_i32); } else { arg.extend_integer_width_to(32); } *offset = offset.align_to(align) + size.align_to(align); } pub fn compute_abi_info(cx: &C, fn_abi: &mut FnAbi<'_, Ty>) where C: HasDataLayout, { let mut offset = Size::ZERO; if !fn_abi.ret.is_ignore() { classify_ret(cx, &mut fn_abi.ret, &mut offset); } for arg in fn_abi.args.iter_mut() { if arg.is_ignore() { continue; } classify_arg(cx, arg, &mut offset); } }