diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_mir_build/src/builder/expr/as_rvalue.rs | 80 |
1 files changed, 2 insertions, 78 deletions
diff --git a/compiler/rustc_mir_build/src/builder/expr/as_rvalue.rs b/compiler/rustc_mir_build/src/builder/expr/as_rvalue.rs index daf8fa5f19e..a4ef6e92739 100644 --- a/compiler/rustc_mir_build/src/builder/expr/as_rvalue.rs +++ b/compiler/rustc_mir_build/src/builder/expr/as_rvalue.rs @@ -1,6 +1,6 @@ //! See docs in `build/expr/mod.rs`. -use rustc_abi::{BackendRepr, FieldIdx, Primitive}; +use rustc_abi::FieldIdx; use rustc_hir::lang_items::LangItem; use rustc_index::{Idx, IndexVec}; use rustc_middle::bug; @@ -9,7 +9,6 @@ use rustc_middle::mir::interpret::Scalar; use rustc_middle::mir::*; use rustc_middle::thir::*; use rustc_middle::ty::cast::{CastTy, mir_cast_kind}; -use rustc_middle::ty::layout::IntegerExt; use rustc_middle::ty::util::IntTypeExt; use rustc_middle::ty::{self, Ty, UpvarArgs}; use rustc_span::source_map::Spanned; @@ -200,8 +199,6 @@ impl<'a, 'tcx> Builder<'a, 'tcx> { { let discr_ty = adt_def.repr().discr_type().to_ty(this.tcx); let temp = unpack!(block = this.as_temp(block, scope, source, Mutability::Not)); - let layout = - this.tcx.layout_of(this.typing_env().as_query_input(source_expr.ty)); let discr = this.temp(discr_ty, source_expr.span); this.cfg.push_assign( block, @@ -209,80 +206,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> { discr, Rvalue::Discriminant(temp.into()), ); - let (op, ty) = (Operand::Move(discr), discr_ty); - - if let BackendRepr::Scalar(scalar) = layout.unwrap().backend_repr - && !scalar.is_always_valid(&this.tcx) - && let Primitive::Int(int_width, _signed) = scalar.primitive() - { - let unsigned_ty = int_width.to_ty(this.tcx, false); - let unsigned_place = this.temp(unsigned_ty, expr_span); - this.cfg.push_assign( - block, - source_info, - unsigned_place, - Rvalue::Cast(CastKind::IntToInt, Operand::Copy(discr), unsigned_ty), - ); - - let bool_ty = this.tcx.types.bool; - let range = scalar.valid_range(&this.tcx); - let merge_op = - if range.start <= range.end { BinOp::BitAnd } else { BinOp::BitOr }; - - let mut comparer = |range: u128, bin_op: BinOp| -> Place<'tcx> { - // We can use `ty::TypingEnv::fully_monomorphized()` here - // as we only need it to compute the layout of a primitive. - let range_val = Const::from_bits( - this.tcx, - range, - ty::TypingEnv::fully_monomorphized(), - unsigned_ty, - ); - let lit_op = this.literal_operand(expr.span, range_val); - let is_bin_op = this.temp(bool_ty, expr_span); - this.cfg.push_assign( - block, - source_info, - is_bin_op, - Rvalue::BinaryOp( - bin_op, - Box::new((Operand::Copy(unsigned_place), lit_op)), - ), - ); - is_bin_op - }; - let assert_place = if range.start == 0 { - comparer(range.end, BinOp::Le) - } else { - let start_place = comparer(range.start, BinOp::Ge); - let end_place = comparer(range.end, BinOp::Le); - let merge_place = this.temp(bool_ty, expr_span); - this.cfg.push_assign( - block, - source_info, - merge_place, - Rvalue::BinaryOp( - merge_op, - Box::new(( - Operand::Move(start_place), - Operand::Move(end_place), - )), - ), - ); - merge_place - }; - this.cfg.push( - block, - Statement::new( - source_info, - StatementKind::Intrinsic(Box::new(NonDivergingIntrinsic::Assume( - Operand::Move(assert_place), - ))), - ), - ); - } - - (op, ty) + (Operand::Move(discr), discr_ty) } else { let ty = source_expr.ty; let source = unpack!( |