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Speed up calls to get_tydesc and kill cname-redundant glue generation.

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This commit is contained in:
Graydon Hoare 2011-04-26 17:19:44 -07:00
parent 592cd5fa30
commit e77f5b1561
1 changed files with 29 additions and 16 deletions
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45
src/comp/middle/trans.rs
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@ -1564,20 +1564,16 @@ fn get_tydesc(&@block_ctxt cx, ty.t t) -> result {
}
// Does it contain a type param? If so, generate a derived tydesc.
let uint n_params = ty.count_ty_params(cx.fcx.lcx.ccx.tcx, t);
if (n_params > 0u) {
if (ty.type_contains_params(cx.fcx.lcx.ccx.tcx, t)) {
let uint n_params = ty.count_ty_params(cx.fcx.lcx.ccx.tcx, t);
auto tys = linearize_ty_params(cx, t);
check (n_params == _vec.len[uint](tys._0));
check (n_params == _vec.len[ValueRef](tys._1));
if (!cx.fcx.lcx.ccx.tydescs.contains_key(t)) {
declare_tydesc(cx.fcx.lcx, t);
define_tydesc(cx.fcx.lcx, t, tys._0);
}
auto root = cx.fcx.lcx.ccx.tydescs.get(t).tydesc;
auto root = get_static_tydesc(cx, t, tys._0).tydesc;
auto tydescs = alloca(cx, T_array(T_ptr(T_tydesc(cx.fcx.lcx.ccx.tn)),
1u /* for root*/ + n_params));
@ -1610,18 +1606,35 @@ fn get_tydesc(&@block_ctxt cx, ty.t t) -> result {
}
// Otherwise, generate a tydesc if necessary, and return it.
if (!cx.fcx.lcx.ccx.tydescs.contains_key(t)) {
let vec[uint] tps = vec();
declare_tydesc(cx.fcx.lcx, t);
define_tydesc(cx.fcx.lcx, t, tps);
let vec[uint] tps = vec();
ret res(cx, get_static_tydesc(cx, t, tps).tydesc);
}
fn get_static_tydesc(&@block_ctxt cx,
ty.t t, vec[uint] ty_params) -> @tydesc_info {
alt (cx.fcx.lcx.ccx.tydescs.find(t)) {
case (some[@tydesc_info](?info)) {
ret info;
}
case (none[@tydesc_info]) {
fn simplifier(ty.t typ) -> ty.t {
ret @rec(cname=none[str] with *typ);
}
auto f = simplifier;
auto t_simplified = ty.fold_ty(cx.fcx.lcx.ccx.tcx, f, t);
auto info = declare_tydesc(cx.fcx.lcx, t_simplified);
cx.fcx.lcx.ccx.tydescs.insert(t, info);
cx.fcx.lcx.ccx.tydescs.insert(t_simplified, info);
define_tydesc(cx.fcx.lcx, t, ty_params);
ret info;
}
}
ret res(cx, cx.fcx.lcx.ccx.tydescs.get(t).tydesc);
}
// Generates the declaration for (but doesn't fill in) a type descriptor. This
// needs to be separate from make_tydesc() below, because sometimes type glue
// functions needs to refer to their own type descriptors.
fn declare_tydesc(@local_ctxt cx, ty.t t) {
fn declare_tydesc(@local_ctxt cx, ty.t t) -> @tydesc_info {
auto take_glue = declare_generic_glue(cx, t, T_glue_fn(cx.ccx.tn),
"take");
auto drop_glue = declare_generic_glue(cx, t, T_glue_fn(cx.ccx.tn),
@ -1666,14 +1679,14 @@ fn declare_tydesc(@local_ctxt cx, ty.t t) {
llvm.LLVMSetLinkage(gvar, lib.llvm.LLVMInternalLinkage
as llvm.Linkage);
auto info = rec(
auto info = @rec(
tydesc=gvar,
take_glue=take_glue,
drop_glue=drop_glue,
cmp_glue=cmp_glue
);
ccx.tydescs.insert(t, @info);
ret info;
}
tag make_generic_glue_helper_fn {