diff options
Diffstat (limited to 'compiler/rustc_const_eval/src')
| -rw-r--r-- | compiler/rustc_const_eval/src/util/aggregate.rs | 77 | ||||
| -rw-r--r-- | compiler/rustc_const_eval/src/util/mod.rs | 2 | 
2 files changed, 0 insertions, 79 deletions
| diff --git a/compiler/rustc_const_eval/src/util/aggregate.rs b/compiler/rustc_const_eval/src/util/aggregate.rs deleted file mode 100644 index 10783c5ed1d..00000000000 --- a/compiler/rustc_const_eval/src/util/aggregate.rs +++ /dev/null @@ -1,77 +0,0 @@ -use rustc_index::vec::Idx; -use rustc_middle::mir::*; -use rustc_middle::ty::{Ty, TyCtxt}; -use rustc_target::abi::VariantIdx; - -use std::iter::TrustedLen; - -/// Expand `lhs = Rvalue::Aggregate(kind, operands)` into assignments to the fields. -/// -/// Produces something like -/// ```ignore (ilustrative) -/// (lhs as Variant).field0 = arg0; // We only have a downcast if this is an enum -/// (lhs as Variant).field1 = arg1; -/// discriminant(lhs) = variant_index; // If lhs is an enum or generator. -/// ``` -pub fn expand_aggregate<'tcx>( - orig_lhs: Place<'tcx>, - operands: impl Iterator<Item = (Operand<'tcx>, Ty<'tcx>)> + TrustedLen, - kind: AggregateKind<'tcx>, - source_info: SourceInfo, - tcx: TyCtxt<'tcx>, -) -> impl Iterator<Item = Statement<'tcx>> + TrustedLen { - let mut lhs = orig_lhs; - let mut set_discriminant = None; - let active_field_index = match kind { - AggregateKind::Adt(adt_did, variant_index, _, _, active_field_index) => { - let adt_def = tcx.adt_def(adt_did); - if adt_def.is_enum() { - set_discriminant = Some(Statement { - kind: StatementKind::SetDiscriminant { - place: Box::new(orig_lhs), - variant_index, - }, - source_info, - }); - lhs = tcx.mk_place_downcast(orig_lhs, adt_def, variant_index); - } - active_field_index - } - AggregateKind::Generator(..) => { - // Right now we only support initializing generators to - // variant 0 (Unresumed). - let variant_index = VariantIdx::new(0); - set_discriminant = Some(Statement { - kind: StatementKind::SetDiscriminant { place: Box::new(orig_lhs), variant_index }, - source_info, - }); - - // Operands are upvars stored on the base place, so no - // downcast is necessary. - - None - } - _ => None, - }; - - let operands = operands.enumerate().map(move |(i, (op, ty))| { - let lhs_field = if let AggregateKind::Array(_) = kind { - let offset = u64::try_from(i).unwrap(); - tcx.mk_place_elem( - lhs, - ProjectionElem::ConstantIndex { offset, min_length: offset + 1, from_end: false }, - ) - } else { - let field = Field::new(active_field_index.unwrap_or(i)); - tcx.mk_place_field(lhs, field, ty) - }; - Statement { - source_info, - kind: StatementKind::Assign(Box::new((lhs_field, Rvalue::Use(op)))), - } - }); - [Statement { source_info, kind: StatementKind::Deinit(Box::new(orig_lhs)) }] - .into_iter() - .chain(operands) - .chain(set_discriminant) -} diff --git a/compiler/rustc_const_eval/src/util/mod.rs b/compiler/rustc_const_eval/src/util/mod.rs index 76ea5a24e69..51735e33e0f 100644 --- a/compiler/rustc_const_eval/src/util/mod.rs +++ b/compiler/rustc_const_eval/src/util/mod.rs @@ -1,4 +1,3 @@ -pub mod aggregate; mod alignment; mod call_kind; pub mod collect_writes; @@ -7,7 +6,6 @@ mod find_self_call; mod might_permit_raw_init; mod type_name; -pub use self::aggregate::expand_aggregate; pub use self::alignment::is_disaligned; pub use self::call_kind::{call_kind, CallDesugaringKind, CallKind}; pub use self::compare_types::{is_equal_up_to_subtyping, is_subtype}; | 
