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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use core::prelude::*;
use metadata::csearch;
use middle::astencode;
use middle::trans::base::{get_insn_ctxt};
use middle::trans::base::{impl_owned_self, impl_self, no_self};
use middle::trans::base::{trans_item, get_item_val, trans_fn};
use middle::trans::common::*;
use middle::ty;
use util::ppaux::ty_to_str;
use core::vec;
use syntax::ast;
use syntax::ast_map::path_name;
use syntax::ast_util::local_def;
// `translate` will be true if this function is allowed to translate the
// item and false otherwise. Currently, this parameter is set to false when
// translating default methods.
pub fn maybe_instantiate_inline(ccx: @CrateContext, fn_id: ast::def_id,
translate: bool)
-> ast::def_id {
let _icx = ccx.insn_ctxt("maybe_instantiate_inline");
match ccx.external.find(&fn_id) {
Some(&Some(node_id)) => {
// Already inline
debug!("maybe_instantiate_inline(%s): already inline as node id %d",
ty::item_path_str(ccx.tcx, fn_id), node_id);
local_def(node_id)
}
Some(&None) => fn_id, // Not inlinable
None => { // Not seen yet
match csearch::maybe_get_item_ast(
ccx.tcx, fn_id,
|a,b,c,d| {
astencode::decode_inlined_item(a, b, ccx.maps,
/*bad*/ copy c, d)
}) {
csearch::not_found => {
ccx.external.insert(fn_id, None);
fn_id
}
csearch::found(ast::ii_item(item)) => {
ccx.external.insert(fn_id, Some(item.id));
ccx.stats.n_inlines += 1;
if translate { trans_item(ccx, *item); }
local_def(item.id)
}
csearch::found(ast::ii_foreign(item)) => {
ccx.external.insert(fn_id, Some(item.id));
local_def(item.id)
}
csearch::found_parent(parent_id, ast::ii_item(item)) => {
ccx.external.insert(parent_id, Some(item.id));
let mut my_id = 0;
match item.node {
ast::item_enum(_, _) => {
let vs_here = ty::enum_variants(ccx.tcx, local_def(item.id));
let vs_there = ty::enum_variants(ccx.tcx, parent_id);
for vec::each2(*vs_here, *vs_there) |here, there| {
if there.id == fn_id { my_id = here.id.node; }
ccx.external.insert(there.id, Some(here.id.node));
}
}
_ => ccx.sess.bug(~"maybe_instantiate_inline: item has a \
non-enum parent")
}
if translate { trans_item(ccx, *item); }
local_def(my_id)
}
csearch::found_parent(_, _) => {
ccx.sess.bug(~"maybe_get_item_ast returned a found_parent \
with a non-item parent");
}
csearch::found(ast::ii_method(impl_did, mth)) => {
ccx.stats.n_inlines += 1;
ccx.external.insert(fn_id, Some(mth.id));
let ty::ty_param_bounds_and_ty {
bounds: impl_bnds,
region_param: _,
ty: _
} = ty::lookup_item_type(ccx.tcx, impl_did);
if translate &&
impl_bnds.len() + mth.generics.ty_params.len() == 0u
{
let llfn = get_item_val(ccx, mth.id);
let path = vec::append(
ty::item_path(ccx.tcx, impl_did),
~[path_name(mth.ident)]);
let self_kind = match mth.self_ty.node {
ast::sty_static => no_self,
_ => {
let self_ty = ty::node_id_to_type(ccx.tcx,
mth.self_id);
debug!("calling inline trans_fn with self_ty %s",
ty_to_str(ccx.tcx, self_ty));
match mth.self_ty.node {
ast::sty_value => impl_owned_self(self_ty),
_ => impl_self(self_ty),
}
}
};
trans_fn(ccx,
path,
&mth.decl,
&mth.body,
llfn,
self_kind,
None,
mth.id,
Some(impl_did));
}
local_def(mth.id)
}
csearch::found(ast::ii_dtor(ref dtor, _, _, _)) => {
ccx.external.insert(fn_id, Some((*dtor).node.id));
local_def((*dtor).node.id)
}
}
}
}
}
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