| use crate::mir::*; |
| use crate::ty::GenericArgsRef; |
| use crate::ty::{self, TyCtxt}; |
| use rustc_span::def_id::DefId; |
| |
| /// Checks if the specified `local` is used as the `self` parameter of a method call |
| /// in the provided `BasicBlock`. If it is, then the `DefId` of the called method is |
| /// returned. |
| pub fn find_self_call<'tcx>( |
| tcx: TyCtxt<'tcx>, |
| body: &Body<'tcx>, |
| local: Local, |
| block: BasicBlock, |
| ) -> Option<(DefId, GenericArgsRef<'tcx>)> { |
| debug!("find_self_call(local={:?}): terminator={:?}", local, &body[block].terminator); |
| if let Some(Terminator { kind: TerminatorKind::Call { func, args, .. }, .. }) = |
| &body[block].terminator |
| { |
| debug!("find_self_call: func={:?}", func); |
| if let Operand::Constant(box Constant { literal, .. }) = func { |
| if let ty::FnDef(def_id, fn_args) = *literal.ty().kind() { |
| if let Some(ty::AssocItem { fn_has_self_parameter: true, .. }) = |
| tcx.opt_associated_item(def_id) |
| { |
| debug!("find_self_call: args={:?}", fn_args); |
| if let [Operand::Move(self_place) | Operand::Copy(self_place), ..] = **args { |
| if self_place.as_local() == Some(local) { |
| return Some((def_id, fn_args)); |
| } |
| } |
| } |
| } |
| } |
| } |
| None |
| } |
