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Improve PlaceElem::Subslice handling

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This commit is contained in:
bjorn3 2020-01-18 10:23:51 +01:00
parent ddd3d95a7e
commit 85ce626865
1 changed files with 2 additions and 3 deletions
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5
src/base.rs
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@ -678,11 +678,10 @@ pub fn trans_place<'tcx>(
// slice[from:-to] in Python terms. // slice[from:-to] in Python terms.
match cplace.layout().ty.kind { match cplace.layout().ty.kind {
ty::Array(elem_ty, len) => { ty::Array(elem_ty, _len) => {
assert!(!from_end, "array subslices are never `from_end`");
let elem_layout = fx.layout_of(elem_ty); let elem_layout = fx.layout_of(elem_ty);
let ptr = cplace.to_ptr(fx); let ptr = cplace.to_ptr(fx);
let len = crate::constant::force_eval_const(fx, len)
.eval_usize(fx.tcx, ParamEnv::reveal_all());
cplace = CPlace::for_ptr( cplace = CPlace::for_ptr(
ptr.offset_i64(fx, elem_layout.size.bytes() as i64 * from as i64), ptr.offset_i64(fx, elem_layout.size.bytes() as i64 * from as i64),
fx.layout_of(fx.tcx.mk_array(elem_ty, to as u64 - from as u64)), fx.layout_of(fx.tcx.mk_array(elem_ty, to as u64 - from as u64)),