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Recognize last uses for copied closed-over variables

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And clean up and fix some bad things in last_use.rs.

Closes #1894
This commit is contained in:
Marijn Haverbeke 2012-02-28 22:40:35 +01:00
parent cccb0fbf72
commit 0da1aca498
8 changed files with 171 additions and 118 deletions
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9
src/comp/metadata/astencode.rs
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@ -13,13 +13,10 @@ import std::serialization::deserializer;
import std::serialization::serializer_helpers;
import std::serialization::deserializer_helpers;
import middle::trans::common::maps;
import middle::ty;
import middle::typeck;
import middle::{ty, typeck, last_use, ast_map};
import middle::typeck::method_origin;
import middle::typeck::dict_res;
import middle::typeck::dict_origin;
import middle::ast_map;
import driver::session;
import driver::session::session;
import middle::freevars::freevar_entry;
import c = common;
@ -248,7 +245,7 @@ fn decode_id_range(par_doc: ebml::doc) -> id_range {
}
}
fn reserve_id_range(sess: session::session,
fn reserve_id_range(sess: session,
from_id_range: id_range) -> id_range {
// Handle the case of an empty range:
if empty(from_id_range) { ret from_id_range; }
@ -781,7 +778,7 @@ fn decode_side_tables(xcx: extended_decode_ctxt,
} else if tag == (c::tag_table_copy as uint) {
dcx.maps.copy_map.insert(id, ());
} else if tag == (c::tag_table_last_use as uint) {
dcx.maps.last_uses.insert(id, ());
dcx.maps.last_uses.insert(id, last_use::is_last_use);
} else {
let val_doc = entry_doc[c::tag_table_val];
let val_dsr = serialization::mk_ebml_deserializer(val_doc);