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Pass stuff to take_ty, free_ty, and drop_ty by address, even when immediate

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The glue-calling will spill the values again anyway. This should
prevent a lot of load/spill junk in the output. It is also necessary
to be able to have unique vecs be immediate values (take must know the
actual address to be able to duplicate).
This commit is contained in:
Marijn Haverbeke 2011-08-26 11:20:10 +02:00
parent b0db13956f
commit 5917d80cd7
2 changed files with 29 additions and 39 deletions
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58
src/comp/middle/trans.rs
View file

@ -1312,7 +1312,7 @@ fn make_take_glue(cx: &@block_ctxt, v: ValueRef, t: ty::t) {
bcx = incr_refcnt_of_boxed(cx, bld::Load(cx, v)).bcx;
} else if ty::type_is_structural(bcx_tcx(cx), t) {
bcx = duplicate_heap_parts_if_necessary(cx, v, t).bcx;
bcx = iter_structural_ty(bcx, v, t, bind take_ty(_, _, _)).bcx;
bcx = iter_structural_ty(bcx, v, t, take_ty).bcx;
} else { bcx = cx; }
build_return(bcx);
@ -1349,8 +1349,7 @@ fn make_free_glue(cx: &@block_ctxt, v0: ValueRef, t: ty::t) {
let body =
bld::GEP(cx, v, [C_int(0), C_int(abi::box_rc_field_body)]);
let body_ty = body_mt.ty;
let body_val = load_if_immediate(cx, body, body_ty);
let rs = drop_ty(cx, body_val, body_ty);
let rs = drop_ty(cx, body, body_ty);
if !bcx_ccx(cx).sess.get_opts().do_gc {
trans_non_gc_free(rs.bcx, v)
} else { rslt(cx, C_nil()) }
@ -1469,7 +1468,7 @@ fn make_drop_glue(cx: &@block_ctxt, v0: ValueRef, t: ty::t) {
_ {
if ty::type_has_pointers(ccx.tcx, t) &&
ty::type_is_structural(ccx.tcx, t) {
iter_structural_ty(cx, v0, t, bind drop_ty(_, _, _))
iter_structural_ty(cx, v0, t, drop_ty)
} else { rslt(cx, C_nil()) }
}
};
@ -1518,7 +1517,7 @@ fn trans_res_drop(cx: @block_ctxt, rs: ValueRef, did: &ast::def_id,
let val_cast = bld::BitCast(cx, val.val, val_llty);
bld::FastCall(cx, dtor_addr, args + [val_cast]);
cx = drop_slot(cx, val.val, inner_t_s).bcx;
cx = drop_ty(cx, val.val, inner_t_s).bcx;
bld::Store(cx, C_int(0), drop_flag.val);
bld::Br(cx, next_cx.llbb);
ret rslt(next_cx, C_nil());
@ -1549,7 +1548,7 @@ fn decr_refcnt_maybe_free(cx: &@block_ctxt, box_ptr_alias: ValueRef,
let zero_test = bld::ICmp(rc_adj_cx, lib::llvm::LLVMIntEQ, C_int(0), rc);
bld::CondBr(rc_adj_cx, zero_test, free_cx.llbb, next_cx.llbb);
let free_res =
free_ty(free_cx, load_if_immediate(free_cx, full_alias, t), t);
free_ty(free_cx, full_alias, t);
bld::Br(free_res.bcx, next_cx.llbb);
let t_else = T_nil();
let v_else = C_nil();
@ -1728,7 +1727,7 @@ fn iter_structural_ty_full(cx: &@block_ctxt, av: ValueRef, t: ty::t,
let next_cx = new_sub_block_ctxt(cx, "next");
let null_test = bld::IsNull(cx, box_ptr);
bld::CondBr(cx, null_test, next_cx.llbb, inner_cx.llbb);
let r = f(inner_cx, box_ptr, tbox);
let r = f(inner_cx, box_cell, tbox);
bld::Br(r.bcx, next_cx.llbb);
ret rslt(next_cx, C_nil());
}
@ -1772,9 +1771,7 @@ fn iter_structural_ty_full(cx: &@block_ctxt, av: ValueRef, t: ty::t,
bld::CondBr(loop_header_cx, not_yet_at_end, loop_body_cx.llbb,
next_cx.llbb);
rs =
f(loop_body_cx,
load_if_immediate(loop_body_cx, dest_elem, unit_ty), unit_ty);
rs = f(loop_body_cx, dest_elem, unit_ty);
loop_body_cx = rs.bcx;
@ -1805,8 +1802,7 @@ fn iter_structural_ty_full(cx: &@block_ctxt, av: ValueRef, t: ty::t,
let llfldp_a = rslt.val;
cx = rslt.bcx;
let ty_subst = ty::substitute_type_params(ccx.tcx, tps, a.ty);
let llfld_a = load_if_immediate(cx, llfldp_a, ty_subst);
rslt = f(cx, llfld_a, ty_subst);
rslt = f(cx, llfldp_a, ty_subst);
cx = rslt.bcx;
j += 1;
}
@ -1822,9 +1818,7 @@ fn iter_structural_ty_full(cx: &@block_ctxt, av: ValueRef, t: ty::t,
for fld: ty::field in fields {
r = GEP_tup_like(r.bcx, t, av, [0, i]);
let llfld_a = r.val;
r =
f(r.bcx, load_if_immediate(r.bcx, llfld_a, fld.mt.ty),
fld.mt.ty);
r = f(r.bcx, llfld_a, fld.mt.ty);
i += 1;
}
}
@ -1833,7 +1827,7 @@ fn iter_structural_ty_full(cx: &@block_ctxt, av: ValueRef, t: ty::t,
for arg in args {
r = GEP_tup_like(r.bcx, t, av, [0, i]);
let llfld_a = r.val;
r = f(r.bcx, load_if_immediate(r.bcx, llfld_a, arg), arg);
r = f(r.bcx, llfld_a, arg);
i += 1;
}
}
@ -1844,7 +1838,7 @@ fn iter_structural_ty_full(cx: &@block_ctxt, av: ValueRef, t: ty::t,
let tup_t = ty::mk_tup(tcx, [ty::mk_int(tcx), inner_t_s]);
r = GEP_tup_like(r.bcx, tup_t, av, [0, 1]);
let llfld_a = r.val;
r = f(r.bcx, load_if_immediate(r.bcx, llfld_a, inner1), inner1);
r = f(r.bcx, llfld_a, inner1);
}
ty::ty_tag(tid, tps) {
let variants = ty::tag_variants(bcx_tcx(cx), tid);
@ -1864,7 +1858,7 @@ fn iter_structural_ty_full(cx: &@block_ctxt, av: ValueRef, t: ty::t,
// NB: we must hit the discriminant first so that structural
// comparison know not to proceed when the discriminants differ.
let bcx = cx;
bcx = f(bcx, lldiscrim_a, ty::mk_int(bcx_tcx(cx))).bcx;
bcx = f(bcx, lldiscrim_a_ptr, ty::mk_int(bcx_tcx(cx))).bcx;
let unr_cx = new_sub_block_ctxt(bcx, "tag-iter-unr");
bld::Unreachable(unr_cx);
let llswitch = bld::Switch(bcx, lldiscrim_a, unr_cx.llbb, n_variants);
@ -2141,7 +2135,7 @@ fn call_tydesc_glue_full(cx: &@block_ctxt, v: ValueRef, tydesc: ValueRef,
}
}
let llrawptr = bld::BitCast(cx, v, T_ptr(T_i8()));
let llrawptr = bld::PointerCast(cx, v, T_ptr(T_i8()));
let lltydescs =
bld::GEP(cx, tydesc,
[C_int(0), C_int(abi::tydesc_field_first_param)]);
@ -2165,8 +2159,7 @@ fn call_tydesc_glue(cx: &@block_ctxt, v: ValueRef, t: ty::t, field: int) ->
result {
let ti: option::t<@tydesc_info> = none::<@tydesc_info>;
let td = get_tydesc(cx, t, false, tps_normal, ti).result;
call_tydesc_glue_full(td.bcx, spill_if_immediate(td.bcx, v, t), td.val,
field, ti);
call_tydesc_glue_full(td.bcx, v, td.val, field, ti);
ret rslt(td.bcx, C_nil());
}
@ -2266,11 +2259,6 @@ fn take_ty(cx: &@block_ctxt, v: ValueRef, t: ty::t) -> result {
ret rslt(cx, C_nil());
}
fn drop_slot(cx: &@block_ctxt, slot: ValueRef, t: ty::t) -> result {
let llptr = load_if_immediate(cx, slot, t);
ret drop_ty(cx, llptr, t);
}
fn drop_ty(cx: &@block_ctxt, v: ValueRef, t: ty::t) -> result {
if ty::type_needs_drop(bcx_tcx(cx), t) {
ret call_tydesc_glue(cx, v, t, abi::tydesc_field_drop_glue);
@ -2392,10 +2380,10 @@ fn copy_val_no_check(cx: &@block_ctxt, action: copy_action, dst: ValueRef,
ret cx;
} else if ty::type_is_boxed(ccx.tcx, t) {
let bcx = if action == DROP_EXISTING {
drop_ty(cx, bld::Load(cx, dst), t).bcx
drop_ty(cx, dst, t).bcx
} else { cx };
bcx = take_ty(bcx, src, t).bcx;
bld::Store(bcx, src, dst);
bcx = take_ty(bcx, dst, t).bcx;
ret bcx;
} else if type_is_structural_or_param(ccx.tcx, t) {
let bcx = if action == DROP_EXISTING {
@ -2433,7 +2421,7 @@ fn move_val(cx: @block_ctxt, action: copy_action, dst: ValueRef,
ty::type_is_boxed(tcx, t) {
if src.is_mem { src_val = bld::Load(cx, src_val); }
if action == DROP_EXISTING {
cx = drop_ty(cx, bld::Load(cx, dst), t).bcx;
cx = drop_ty(cx, dst, t).bcx;
}
bld::Store(cx, src_val, dst);
if src.is_mem { ret zero_alloca(cx, src.res.val, t).bcx; }
@ -3963,9 +3951,12 @@ fn trans_arg_expr(cx: &@block_ctxt, arg: &ty::arg, lldestty0: TypeRef,
add_clean_temp(bcx, val, e_ty);
} else {
if lv.is_mem {
bcx = take_ty(bcx, val, e_ty).bcx;
val = load_if_immediate(bcx, val, e_ty);
} else if is_ext_vec_plus {
let spilled = do_spill(bcx, val);
bcx = take_ty(bcx, spilled, e_ty).bcx;
}
bcx = take_ty(bcx, val, e_ty).bcx;
add_clean_temp(bcx, val, e_ty);
}
} else if type_is_immediate(ccx, e_ty) && !lv.is_mem {
@ -4481,11 +4472,6 @@ fn with_out_method(work: fn(&out_method) -> result, cx: @block_ctxt,
if ty::type_is_nil(ccx.tcx, tp) { ret work(return); }
let res_alloca = alloc_ty(cx, tp);
cx = zero_alloca(res_alloca.bcx, res_alloca.val, tp).bcx;
fn drop_hoisted_ty(cx: &@block_ctxt, target: ValueRef, t: ty::t) ->
result {
let reg_val = load_if_immediate(cx, target, t);
ret drop_ty(cx, reg_val, t);
}
let done = work(save_in(res_alloca.val));
let loaded = load_if_immediate(done.bcx, res_alloca.val, tp);
add_clean_temp(cx, loaded, tp);
@ -5274,7 +5260,7 @@ fn copy_args_to_allocas(fcx: @fn_ctxt, scope: @block_ctxt,
// Args that are locally assigned to need to do a local
// take/drop
if fcx.lcx.ccx.mut_map.contains_key(aarg.id) {
bcx = take_ty(bcx, aval, arg_ty).bcx;
bcx = take_ty(bcx, addr, arg_ty).bcx;
add_clean(scope, addr, arg_ty);
}
}

10
src/comp/middle/trans_common.rs
View file

@ -59,7 +59,6 @@ import bld = trans_build;
// FIXME: These should probably be pulled in here too.
import trans::type_of_fn_full;
import trans::drop_slot;
import trans::drop_ty;
obj namegen(mutable i: int) {
@ -299,10 +298,15 @@ tag cleanup {
}
fn add_clean(cx: &@block_ctxt, val: ValueRef, ty: ty::t) {
find_scope_cx(cx).cleanups += [clean(bind drop_slot(_, val, ty))];
find_scope_cx(cx).cleanups += [clean(bind drop_ty(_, val, ty))];
}
fn add_clean_temp(cx: &@block_ctxt, val: ValueRef, ty: ty::t) {
find_scope_cx(cx).cleanups += [clean_temp(val, bind drop_ty(_, val, ty))];
fn spill_and_drop(bcx: &@block_ctxt, val: ValueRef, ty: ty::t) -> result {
let spilled = trans::spill_if_immediate(bcx, val, ty);
ret drop_ty(bcx, spilled, ty);
}
find_scope_cx(cx).cleanups +=
[clean_temp(val, bind spill_and_drop(_, val, ty))];
}
// Note that this only works for temporaries. We should, at some point, move