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adjust constValue::Slice to work for arbitrary slice types

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This commit is contained in:
Ralf Jung 2023-09-15 15:59:47 +02:00
parent 247d38d174
commit dd48b5e393
1 changed files with 4 additions and 8 deletions
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12
src/constant.rs
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@ -184,15 +184,11 @@ pub(crate) fn codegen_const_value<'tcx>(
.offset_i64(fx, i64::try_from(offset.bytes()).unwrap()),
layout,
),
ConstValue::Slice { data, start, end } => {
ConstValue::Slice { data, meta } => {
let alloc_id = fx.tcx.reserve_and_set_memory_alloc(data);
let ptr = pointer_for_allocation(fx, alloc_id)
.offset_i64(fx, i64::try_from(start).unwrap())
.get_addr(fx);
let len = fx
.bcx
.ins()
.iconst(fx.pointer_type, i64::try_from(end.checked_sub(start).unwrap()).unwrap());
let ptr = pointer_for_allocation(fx, alloc_id).get_addr(fx);
// FIXME: the `try_from` here can actually fail, e.g. for very long ZST slices.
let len = fx.bcx.ins().iconst(fx.pointer_type, i64::try_from(meta).unwrap());
CValue::by_val_pair(ptr, len, layout)
}
}