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rustc: Pointer cast when autodereferencing boxed tag types

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This commit is contained in:
Patrick Walton 2011-04-07 15:09:45 -07:00
parent 9b35051143
commit 6dcf6218b1
1 changed files with 13 additions and 1 deletions
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14
src/comp/middle/trans.rs
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@ -2934,7 +2934,19 @@ fn autoderef(@block_ctxt cx, ValueRef v, @ty.t t) -> result {
vec(C_int(0),
C_int(abi.box_rc_field_body)));
t1 = mt.ty;
v1 = load_scalar_or_boxed(cx, body, t1);
// Since we're changing levels of box indirection, we may have
// to cast this pointer, since statically-sized tag types have
// different types depending on whether they're behind a box
// or not.
if (!ty.type_has_dynamic_size(mt.ty)) {
auto llty = type_of(cx.fcx.ccx, mt.ty);
v1 = cx.build.PointerCast(body, T_ptr(llty));
} else {
v1 = body;
}
v1 = load_scalar_or_boxed(cx, v1, t1);
}
case (_) {
ret res(cx, v1);