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Move expr_cast and expr_copy to DPS style 

Issue #667
This commit is contained in:
Marijn Haverbeke 2011-09-29 10:46:49 +02:00
parent d946e09a72
commit f089f533e8
1 changed files with 12 additions and 18 deletions
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30
src/comp/middle/trans.rs
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@ -3392,7 +3392,8 @@ fn float_cast(bcx: @block_ctxt, lldsttype: TypeRef, llsrctype: TypeRef,
} else { llsrc };
}
fn trans_cast(cx: @block_ctxt, e: @ast::expr, id: ast::node_id) -> result {
fn trans_cast(cx: @block_ctxt, e: @ast::expr, id: ast::node_id,
dest: dest) -> @block_ctxt {
let ccx = bcx_ccx(cx);
let e_res = trans_expr(cx, e);
let ll_t_in = val_ty(e_res.val);
@ -3446,7 +3447,7 @@ fn trans_cast(cx: @block_ctxt, e: @ast::expr, id: ast::node_id) -> result {
}
_ { ccx.sess.bug("Translating unsupported cast.") }
};
ret rslt(e_res.bcx, newval);
ret store_in_dest(e_res.bcx, newval, dest);
}
// pth is cx.path
@ -4188,22 +4189,6 @@ fn trans_rec(bcx: @block_ctxt, fields: [ast::field],
fn trans_expr(cx: @block_ctxt, e: @ast::expr) -> result {
// Fixme Fill in cx.sp
alt e.node {
ast::expr_copy(a) {
let e_ty = ty::expr_ty(bcx_tcx(cx), a);
let lv = trans_lval(cx, a);
let bcx = lv.bcx;
if !lv.is_mem { ret {bcx: lv.bcx, val: lv.val}; }
let r = if type_is_immediate(bcx_ccx(cx), e_ty) {
rslt(bcx, Load(bcx, lv.val))
} else {
let {bcx, val: dest} = alloc_ty(bcx, e_ty);
bcx = copy_val(bcx, INIT, dest, lv.val, e_ty);
rslt(bcx, dest)
};
add_clean_temp(bcx, r.val, e_ty);
ret r;
}
ast::expr_cast(val, _) { ret trans_cast(cx, val, e.id); }
ast::expr_anon_obj(anon_obj) {
ret trans_anon_obj(cx, e.span, anon_obj, e.id);
}
@ -4283,6 +4268,15 @@ fn trans_expr_dps(bcx: @block_ctxt, e: @ast::expr, dest: dest)
}
ast::expr_fn(f) { ret trans_expr_fn(bcx, f, e.span, e.id, dest); }
ast::expr_bind(f, args) { ret trans_bind(bcx, f, args, e.id, dest); }
ast::expr_copy(a) {
if !expr_is_lval(bcx_tcx(bcx), a) {
ret trans_expr_dps(bcx, a, dest);
} else {
// FIXME[DPS] give this a name that makes more sense
ret trans_expr_backwards_compat(bcx, e, dest);
}
}
ast::expr_cast(val, _) { ret trans_cast(bcx, val, e.id, dest); }
// These return nothing
ast::expr_break. {