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use crate::abi::call::{ArgType, FnType, Reg};
use crate::abi::Abi;
// Win64 ABI: http://msdn.microsoft.com/en-us/library/zthk2dkh.aspx
pub fn compute_abi_info<Ty>(fty: &mut FnType<'_, Ty>) {
let fixup = |a: &mut ArgType<'_, 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 !fty.ret.is_ignore() {
fixup(&mut fty.ret);
}
for arg in &mut fty.args {
if arg.is_ignore() { continue; }
fixup(arg);
}
}
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