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rustc: Cache normalized types

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This commit is contained in:
Brian Anderson 2012-04-24 18:23:54 -07:00
parent df0ef528b9
commit 3a3a7fc426
1 changed files with 12 additions and 3 deletions
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15
src/rustc/middle/ty.rs
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@ -227,7 +227,8 @@ type ctxt =
iface_method_cache: hashmap<def_id, @[method]>,
ty_param_bounds: hashmap<ast::node_id, param_bounds>,
inferred_modes: hashmap<ast::node_id, ast::mode>,
borrowings: hashmap<ast::node_id, ()>};
borrowings: hashmap<ast::node_id, ()>,
normalized_cache: hashmap<t, t>};
type t_box = @{struct: sty,
id: uint,
@ -461,7 +462,8 @@ fn mk_ctxt(s: session::session, dm: resolve::def_map, amap: ast_map::map,
iface_method_cache: new_def_hash(),
ty_param_bounds: map::int_hash(),
inferred_modes: map::int_hash(),
borrowings: map::int_hash()}
borrowings: map::int_hash(),
normalized_cache: new_ty_hash()}
}
@ -2680,6 +2682,11 @@ fn ty_params_to_tys(tcx: ty::ctxt, tps: [ast::ty_param]) -> [t] {
Returns an equivalent type with all the typedefs and self regions removed.
"]
fn normalize_ty(cx: ctxt, t: t) -> t {
alt cx.normalized_cache.find(t) {
some(t) { ret t; }
none { }
}
let t = alt get(t).struct {
ty_enum(did, r) {
alt r.self_r {
@ -2698,7 +2705,9 @@ fn normalize_ty(cx: ctxt, t: t) -> t {
let t = mk_t(cx, mach_sty(cx.sess.targ_cfg, t));
let sty = fold_sty(get(t).struct) {|t| normalize_ty(cx, t) };
mk_t(cx, sty)
let t_norm = mk_t(cx, sty);
cx.normalized_cache.insert(t, t_norm);
ret t_norm;
}
// Local Variables: