2012-12-03 18:48:01 -06:00
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// Copyright 2012 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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2013-09-11 12:06:16 -05:00
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use lib::llvm::{AvailableExternallyLinkage, SetLinkage};
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2013-02-25 13:11:21 -06:00
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use metadata::csearch;
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2012-12-23 16:41:37 -06:00
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use middle::astencode;
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2014-01-11 08:39:32 -06:00
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use middle::trans::base::{push_ctxt, trans_item, get_item_val, trans_fn};
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2012-12-13 15:05:22 -06:00
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use middle::trans::common::*;
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2013-02-25 13:11:21 -06:00
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use middle::ty;
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2012-12-13 15:05:22 -06:00
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2012-08-28 17:54:45 -05:00
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use syntax::ast;
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2012-12-13 15:05:22 -06:00
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use syntax::ast_util::local_def;
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2013-09-17 13:24:05 -05:00
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use syntax::attr;
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2012-08-28 17:54:45 -05:00
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2014-03-06 10:47:24 -06:00
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pub fn maybe_instantiate_inline(ccx: &CrateContext, fn_id: ast::DefId)
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2013-09-01 20:45:37 -05:00
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-> ast::DefId {
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2013-06-16 23:23:24 -05:00
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let _icx = push_ctxt("maybe_instantiate_inline");
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2014-03-20 21:49:20 -05:00
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match ccx.external.borrow().find(&fn_id) {
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Some(&Some(node_id)) => {
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// Already inline
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debug!("maybe_instantiate_inline({}): already inline as node id {}",
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ty::item_path_str(ccx.tcx(), fn_id), node_id);
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return local_def(node_id);
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}
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Some(&None) => {
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return fn_id; // Not inlinable
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}
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None => {
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// Not seen yet
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2013-03-15 14:24:24 -05:00
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}
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}
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let csearch_result =
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csearch::maybe_get_item_ast(
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2014-03-15 15:29:34 -05:00
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ccx.tcx(), fn_id,
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2014-04-21 18:21:53 -05:00
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|a,b,c,d| astencode::decode_inlined_item(a, b, c, d));
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return match csearch_result {
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csearch::not_found => {
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2014-03-20 21:49:20 -05:00
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ccx.external.borrow_mut().insert(fn_id, None);
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2012-08-28 17:54:45 -05:00
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fn_id
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}
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2014-01-09 07:05:33 -06:00
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csearch::found(ast::IIItem(item)) => {
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ccx.external.borrow_mut().insert(fn_id, Some(item.id));
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ccx.external_srcs.borrow_mut().insert(item.id, fn_id);
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2013-12-18 20:32:52 -06:00
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2013-12-22 15:48:37 -06:00
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ccx.stats.n_inlines.set(ccx.stats.n_inlines.get() + 1);
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2014-05-16 12:15:33 -05:00
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trans_item(ccx, &*item);
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2013-09-11 12:06:16 -05:00
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// We're bringing an external global into this crate, but we don't
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// want to create two copies of the global. If we do this, then if
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// you take the address of the global in two separate crates you get
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// two different addresses. This is bad for things like conditions,
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// but it could possibly have other adverse side effects. We still
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// want to achieve the optimizations related to this global,
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// however, so we use the available_externally linkage which llvm
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// provides
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match item.node {
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ast::ItemStatic(..) => {
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2013-09-11 12:06:16 -05:00
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let g = get_item_val(ccx, item.id);
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2013-09-17 13:24:05 -05:00
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// see the comment in get_item_val() as to why this check is
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// performed here.
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2014-02-28 17:25:15 -06:00
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if !attr::contains_name(item.attrs.as_slice(),
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2013-09-17 13:24:05 -05:00
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"address_insignificant") {
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SetLinkage(g, AvailableExternallyLinkage);
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}
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2013-09-11 12:06:16 -05:00
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}
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_ => {}
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}
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2012-08-28 17:54:45 -05:00
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local_def(item.id)
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2013-05-05 14:11:04 -05:00
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}
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2014-01-09 07:05:33 -06:00
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csearch::found(ast::IIForeign(item)) => {
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2014-03-20 21:49:20 -05:00
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ccx.external.borrow_mut().insert(fn_id, Some(item.id));
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ccx.external_srcs.borrow_mut().insert(item.id, fn_id);
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2013-12-18 20:32:52 -06:00
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local_def(item.id)
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2013-05-05 14:11:04 -05:00
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}
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2014-01-09 07:05:33 -06:00
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csearch::found_parent(parent_id, ast::IIItem(item)) => {
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2014-03-20 21:49:20 -05:00
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ccx.external.borrow_mut().insert(parent_id, Some(item.id));
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ccx.external_srcs.borrow_mut().insert(item.id, parent_id);
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2013-12-18 20:32:52 -06:00
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2013-05-05 14:11:04 -05:00
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let mut my_id = 0;
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match item.node {
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ast::ItemEnum(_, _) => {
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2014-03-15 15:29:34 -05:00
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let vs_here = ty::enum_variants(ccx.tcx(), local_def(item.id));
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let vs_there = ty::enum_variants(ccx.tcx(), parent_id);
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2013-08-03 11:45:23 -05:00
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for (here, there) in vs_here.iter().zip(vs_there.iter()) {
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2013-05-05 14:11:04 -05:00
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if there.id == fn_id { my_id = here.id.node; }
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2014-03-20 21:49:20 -05:00
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ccx.external.borrow_mut().insert(there.id, Some(here.id.node));
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2012-08-28 17:54:45 -05:00
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}
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}
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2014-01-09 07:05:33 -06:00
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ast::ItemStruct(ref struct_def, _) => {
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2013-09-26 23:53:40 -05:00
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match struct_def.ctor_id {
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None => {}
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Some(ctor_id) => {
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2014-03-20 21:49:20 -05:00
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ccx.external.borrow_mut().insert(fn_id, Some(ctor_id));
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2013-09-26 23:53:40 -05:00
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my_id = ctor_id;
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}
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}
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}
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2014-03-05 08:36:01 -06:00
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_ => ccx.sess().bug("maybe_instantiate_inline: item has a \
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non-enum, non-struct parent")
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2012-08-28 17:54:45 -05:00
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}
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2014-05-16 12:15:33 -05:00
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trans_item(ccx, &*item);
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2013-05-05 14:11:04 -05:00
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local_def(my_id)
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}
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csearch::found_parent(_, _) => {
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2014-03-05 08:36:01 -06:00
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ccx.sess().bug("maybe_get_item_ast returned a found_parent \
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2013-05-05 14:11:04 -05:00
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with a non-item parent");
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}
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2014-01-09 07:05:33 -06:00
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csearch::found(ast::IIMethod(impl_did, is_provided, mth)) => {
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2014-03-20 21:49:20 -05:00
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ccx.external.borrow_mut().insert(fn_id, Some(mth.id));
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ccx.external_srcs.borrow_mut().insert(mth.id, fn_id);
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2013-12-18 20:32:52 -06:00
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2014-05-31 17:53:13 -05:00
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ccx.stats.n_inlines.set(ccx.stats.n_inlines.get() + 1);
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2013-12-22 15:48:37 -06:00
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2014-05-31 17:53:13 -05:00
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// If this is a default method, we can't look up the
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// impl type. But we aren't going to translate anyways, so don't.
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if is_provided { return local_def(mth.id); }
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2013-06-12 16:22:17 -05:00
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2014-03-15 15:29:34 -05:00
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let impl_tpt = ty::lookup_item_type(ccx.tcx(), impl_did);
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2014-05-31 17:53:13 -05:00
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let unparameterized =
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impl_tpt.generics.types.is_empty() &&
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mth.generics.ty_params.is_empty();
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2013-06-12 16:22:17 -05:00
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2014-05-31 17:53:13 -05:00
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if unparameterized {
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2013-05-05 14:11:04 -05:00
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let llfn = get_item_val(ccx, mth.id);
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2014-05-16 12:15:33 -05:00
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trans_fn(ccx, &*mth.decl, &*mth.body, llfn,
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2014-05-14 19:53:48 -05:00
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¶m_substs::empty(), mth.id, []);
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2012-08-28 17:54:45 -05:00
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}
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2013-05-05 14:11:04 -05:00
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local_def(mth.id)
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2012-08-28 17:54:45 -05:00
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}
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2013-03-15 14:24:24 -05:00
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};
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2012-08-28 17:54:45 -05:00
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}
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