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Estimated hours taken: 0.75 library/*.m: compiler/*.m: Undo Zoltan's bogus update of all the copyright dates. The dates in the copyright header should reflect the years in which the file was modified (and no, changes to the copyright header itself don't count as modifications).
79 lines
2.9 KiB
Mathematica
79 lines
2.9 KiB
Mathematica
%-----------------------------------------------------------------------------%
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% Copyright (C) 1995-1997 The University of Melbourne.
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% This file may only be copied under the terms of the GNU General
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% Public License - see the file COPYING in the Mercury distribution.
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%-----------------------------------------------------------------------------%
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% File: transform.m
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% Main author: bromage.
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%
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% This module defines the primitive operations that may be performed
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% on a logic program. These include:
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%
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% - unfold (NYI)
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% Replaces a goal with its possible expansions.
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%
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% - fold (NYI)
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% Opposite of unfold (not surprisingly).
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%
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% - definition (NYI)
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% Define a new predicate with a given goal.
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%
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% - identity (NYI)
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% Apply an identity (such as the associative law for
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% addition) to a goal.
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%
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% These operations form the basis of most high-level transformations.
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%
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% Also included is a conjunction rescheduler. Useful just in case
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% your transformer upset the ordering in a conjunction.
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%-----------------------------------------------------------------------------%
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:- module transform.
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:- interface.
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:- import_module hlds_goal, mode_info.
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%:- pred unfold__in_proc(pred_id, proc_id, hlds_goal_expr,
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% mode_info, mode_info).
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%:- mode unfold__in_proc(in, in, out, mode_info_di, module_info_uo) is det.
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:- pred transform__reschedule_conj(list(hlds_goal), list(hlds_goal),
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mode_info, mode_info).
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:- mode transform__reschedule_conj(in, out, mode_info_di, mode_info_uo) is det.
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%-----------------------------------------------------------------------------%
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%-----------------------------------------------------------------------------%
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:- implementation.
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:- import_module list, map, set, std_util.
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:- import_module mode_util, delay_info, term, require.
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:- import_module varset, code_aux, prog_data, instmap.
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%-----------------------------------------------------------------------------%
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% unfold__in_proc(
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%-----------------------------------------------------------------------------%
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transform__reschedule_conj([], []) --> [].
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transform__reschedule_conj([Goal0 | Goals0], Goals) -->
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=(ModeInfo0),
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{ mode_info_get_instmap(ModeInfo0, InstMap0) },
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{ mode_info_get_delay_info(ModeInfo0, DelayInfo0) },
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{ delay_info__wakeup_goals(DelayInfo0, WokenGoals, DelayInfo1) },
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mode_info_set_delay_info(DelayInfo1),
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( { WokenGoals \= [] } ->
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{ list__append(WokenGoals, [Goal0 | Goals0], Goals1) },
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transform__reschedule_conj(Goals1, Goals)
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;
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{ Goal0 = _Goal0Goal - Goal0Info },
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{ goal_info_get_instmap_delta(Goal0Info, InstMapDelta) },
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{ instmap__apply_instmap_delta(InstMap0, InstMapDelta, InstMap1) },
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mode_info_set_instmap(InstMap1),
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transform__reschedule_conj(Goals0, Goals1),
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{ Goals = [Goal0 | Goals1] }
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).
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%-----------------------------------------------------------------------------%
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%-----------------------------------------------------------------------------%
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