65 lines
2.4 KiB
Rust
65 lines
2.4 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use llvm::*;
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use super::common::*;
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use super::machine::*;
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use trans::cabi::{ArgType, FnType};
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use trans::type_::Type;
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// Win64 ABI: http://msdn.microsoft.com/en-us/library/zthk2dkh.aspx
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pub fn compute_abi_info(ccx: &CrateContext,
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atys: &[Type],
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rty: Type,
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ret_def: bool) -> FnType {
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let mut arg_tys = Vec::new();
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let ret_ty;
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if !ret_def {
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ret_ty = ArgType::direct(Type::void(ccx), None, None, None);
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} else if rty.kind() == Struct {
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ret_ty = match llsize_of_alloc(ccx, rty) {
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1 => ArgType::direct(rty, Some(Type::i8(ccx)), None, None),
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2 => ArgType::direct(rty, Some(Type::i16(ccx)), None, None),
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4 => ArgType::direct(rty, Some(Type::i32(ccx)), None, None),
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8 => ArgType::direct(rty, Some(Type::i64(ccx)), None, None),
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_ => ArgType::indirect(rty, Some(Attribute::StructRetAttribute))
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};
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} else {
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let attr = if rty == Type::i1(ccx) { Some(Attribute::ZExtAttribute) } else { None };
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ret_ty = ArgType::direct(rty, None, None, attr);
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}
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for &t in atys {
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let ty = match t.kind() {
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Struct => {
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match llsize_of_alloc(ccx, t) {
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1 => ArgType::direct(rty, Some(Type::i8(ccx)), None, None),
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2 => ArgType::direct(rty, Some(Type::i16(ccx)), None, None),
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4 => ArgType::direct(rty, Some(Type::i32(ccx)), None, None),
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8 => ArgType::direct(rty, Some(Type::i64(ccx)), None, None),
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_ => ArgType::indirect(t, Some(Attribute::ByValAttribute))
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}
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}
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_ => {
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let attr = if t == Type::i1(ccx) { Some(Attribute::ZExtAttribute) } else { None };
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ArgType::direct(t, None, None, attr)
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}
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};
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arg_tys.push(ty);
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}
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return FnType {
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arg_tys: arg_tys,
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ret_ty: ret_ty,
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};
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}
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