use crate::abi::call::{ArgAbi, FnAbi, Reg}; use crate::abi::Abi; // Win64 ABI: https://docs.microsoft.com/en-us/cpp/build/parameter-passing pub fn compute_abi_info(fn_abi: &mut FnAbi<'_, Ty>) { let fixup = |a: &mut ArgAbi<'_, Ty>| { match a.layout.abi { Abi::Uninhabited => {} Abi::ScalarPair(..) | Abi::Aggregate { .. } => match a.layout.size.bits() { 8 => a.cast_to(Reg::i8()), 16 => a.cast_to(Reg::i16()), 32 => a.cast_to(Reg::i32()), 64 => a.cast_to(Reg::i64()), _ => a.make_indirect(), }, Abi::Vector { .. } => { // FIXME(eddyb) there should be a size cap here // (probably what clang calls "illegal vectors"). } Abi::Scalar(_) => { if a.layout.size.bytes() > 8 { a.make_indirect(); } else { a.extend_integer_width_to(32); } } } }; if !fn_abi.ret.is_ignore() { fixup(&mut fn_abi.ret); } for arg in &mut fn_abi.args { if arg.is_ignore() { continue; } fixup(arg); } }