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rustc: Directly emit calls to glue if possible

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This commit is contained in:
Patrick Walton 2011-06-27 15:38:04 -07:00
parent 4558167307
commit e4b5d910dc
1 changed files with 27 additions and 2 deletions
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29
src/comp/middle/trans.rs
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@ -2893,13 +2893,38 @@ fn lazily_emit_tydesc_glue(&@block_ctxt cx, int field,
fn call_tydesc_glue_full(&@block_ctxt cx, ValueRef v, ValueRef tydesc,
int field, &option::t[@tydesc_info] static_ti) {
lazily_emit_tydesc_glue(cx, field, static_ti);
auto static_glue_fn = none;
alt (static_ti) {
case (none) { /* no-op */ }
case (some(?sti)) {
if (field == abi::tydesc_field_take_glue) {
static_glue_fn = sti.take_glue;
} else if (field == abi::tydesc_field_drop_glue) {
static_glue_fn = sti.drop_glue;
} else if (field == abi::tydesc_field_free_glue) {
static_glue_fn = sti.free_glue;
} else if (field == abi::tydesc_field_cmp_glue) {
static_glue_fn = sti.cmp_glue;
}
}
}
auto llrawptr = cx.build.BitCast(v, T_ptr(T_i8()));
auto lltydescs =
cx.build.GEP(tydesc,
[C_int(0), C_int(abi::tydesc_field_first_param)]);
lltydescs = cx.build.Load(lltydescs);
auto llfnptr = cx.build.GEP(tydesc, [C_int(0), C_int(field)]);
auto llfn = cx.build.Load(llfnptr);
auto llfn;
alt (static_glue_fn) {
case (none) {
auto llfnptr = cx.build.GEP(tydesc, [C_int(0), C_int(field)]);
llfn = cx.build.Load(llfnptr);
}
case (some(?sgf)) { llfn = sgf; }
}
cx.build.Call(llfn,
[C_null(T_ptr(T_nil())), cx.fcx.lltaskptr,
C_null(T_ptr(T_nil())), lltydescs, llrawptr]);