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offset_of: allow (unstably) taking the offset of slice tail fields

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This commit is contained in:
Ralf Jung 2024-06-08 11:26:56 +02:00
parent 16e8803579
commit eb584a23bf
17 changed files with 215 additions and 46 deletions
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7
compiler/rustc_mir_transform/src/known_panics_lint.rs
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@ -625,9 +625,10 @@ impl<'mir, 'tcx> ConstPropagator<'mir, 'tcx> {
let val = match null_op {
NullOp::SizeOf => op_layout.size.bytes(),
NullOp::AlignOf => op_layout.align.abi.bytes(),
NullOp::OffsetOf(fields) => {
op_layout.offset_of_subfield(self, fields.iter()).bytes()
}
NullOp::OffsetOf(fields) => self
.tcx
.offset_of_subfield(self.param_env, op_layout, fields.iter())
.bytes(),
NullOp::UbChecks => return None,
};
ImmTy::from_scalar(Scalar::from_target_usize(val, self), layout).into()