1 use crate::util::expand_aggregate;
3 use rustc_middle::mir::*;
4 use rustc_middle::ty::TyCtxt;
6 pub struct Deaggregator;
8 impl<'tcx> MirPass<'tcx> for Deaggregator {
9 fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
10 let basic_blocks = body.basic_blocks.as_mut_preserves_cfg();
11 for bb in basic_blocks {
12 bb.expand_statements(|stmt| {
13 // FIXME(eddyb) don't match twice on `stmt.kind` (post-NLL).
15 // FIXME(#48193) Deaggregate arrays when it's cheaper to do so.
16 StatementKind::Assign(box (
18 Rvalue::Aggregate(box AggregateKind::Array(_), _),
22 StatementKind::Assign(box (_, Rvalue::Aggregate(_, _))) => {}
26 let stmt = stmt.replace_nop();
27 let source_info = stmt.source_info;
28 let StatementKind::Assign(box (lhs, Rvalue::Aggregate(kind, operands))) = stmt.kind else {
32 Some(expand_aggregate(
34 operands.into_iter().map(|op| {
35 let ty = op.ty(&body.local_decls, tcx);