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Fix passing self by value for types passed by value

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For types that are passed by value, we can't just cast the value to a
pointer, but have to use an alloca and copy the value there. This
handling is already present for all other arguments, but was missing
for "self".

Fixes #6682, #4850 and #4878
This commit is contained in:
Björn Steinbrink 2013-06-02 23:27:33 +02:00
parent c354a0c7eb
commit b51f44e21b
1 changed files with 9 additions and 2 deletions
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11
src/librustc/middle/trans/base.rs
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@ -1730,8 +1730,15 @@ pub fn copy_args_to_allocas(fcx: fn_ctxt,
// We really should do this regardless of whether self is owned, but
// it doesn't work right with default method impls yet. (FIXME: #2794)
if slf.is_owned {
let self_val = PointerCast(bcx, slf.v,
T_ptr(type_of(bcx.ccx(), slf.t)));
let self_val = if datum::appropriate_mode(slf.t).is_by_value() {
let tmp = BitCast(bcx, slf.v, type_of(bcx.ccx(), slf.t));
let alloc = alloc_ty(bcx, slf.t);
Store(bcx, tmp, alloc);
alloc
} else {
PointerCast(bcx, slf.v, T_ptr(type_of(bcx.ccx(), slf.t)))
};
fcx.llself = Some(ValSelfData {v: self_val, ..slf});
add_clean(bcx, self_val, slf.t);
}