1 //! Miscellaneous builder routines that are not specific to building any particular
4 use crate::build::Builder;
6 use rustc::ty::{self, Ty};
9 use rustc_span::{Span, DUMMY_SP};
11 impl<'a, 'tcx> Builder<'a, 'tcx> {
12 /// Adds a new temporary value of type `ty` storing the result of
13 /// evaluating `expr`.
15 /// N.B., **No cleanup is scheduled for this temporary.** You should
16 /// call `schedule_drop` once the temporary is initialized.
17 crate fn temp(&mut self, ty: Ty<'tcx>, span: Span) -> Place<'tcx> {
18 let temp = self.local_decls.push(LocalDecl::new_temp(ty, span));
19 let place = Place::from(temp);
20 debug!("temp: created temp {:?} with type {:?}", place, self.local_decls[temp].ty);
24 /// Convenience function for creating a literal operand, one
25 /// without any user type annotation.
26 crate fn literal_operand(
29 literal: &'tcx ty::Const<'tcx>,
31 let constant = box Constant { span, user_ty: None, literal };
32 Operand::Constant(constant)
35 crate fn unit_rvalue(&mut self) -> Rvalue<'tcx> {
36 Rvalue::Aggregate(box AggregateKind::Tuple, vec![])
39 // Returns a zero literal operand for the appropriate type, works for
40 // bool, char and integers.
41 crate fn zero_literal(&mut self, span: Span, ty: Ty<'tcx>) -> Operand<'tcx> {
42 let literal = ty::Const::from_bits(self.hir.tcx(), 0, ty::ParamEnv::empty().and(ty));
44 self.literal_operand(span, literal)
50 source_info: SourceInfo,
53 let usize_ty = self.hir.usize_ty();
54 let temp = self.temp(usize_ty, source_info.span);
55 self.cfg.push_assign_constant(
60 span: source_info.span,
62 literal: self.hir.usize_literal(value),
68 crate fn consume_by_copy_or_move(&self, place: Place<'tcx>) -> Operand<'tcx> {
69 let tcx = self.hir.tcx();
70 let ty = place.ty(&self.local_decls, tcx).ty;
71 if !self.hir.type_is_copy_modulo_regions(ty, DUMMY_SP) {