mirror of
https://github.com/Mercury-Language/mercury.git
synced 2025-12-16 06:14:59 +00:00
6cc1f3e0b0
*.m: Changed the way the extra field in the label type is defined. Now all labels are initially assumed to be 'unknown' and a seperate profiling pass (to be implemented) will determine whether the label can be accessed externally.
336 lines
12 KiB
Mathematica
336 lines
12 KiB
Mathematica
%---------------------------------------------------------------------------%
|
|
% Copyright (C) 1995 University of Melbourne.
|
|
% This file may only be copied under the terms of the GNU General
|
|
% Public License - see the file COPYING in the Mercury distribution.
|
|
%---------------------------------------------------------------------------%
|
|
%---------------------------------------------------------------------------%
|
|
%
|
|
% file: code_util.m.
|
|
%
|
|
% various utilities routines for code generation and recognition
|
|
% of builtins.
|
|
%
|
|
%---------------------------------------------------------------------------%
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- module code_util.
|
|
|
|
:- interface.
|
|
|
|
:- import_module list, string.
|
|
:- import_module hlds, llds.
|
|
|
|
:- pred code_util__make_local_entry_label(module_info, pred_id, proc_id, label).
|
|
:- mode code_util__make_local_entry_label(in, in, in, out) is det.
|
|
|
|
:- pred code_util__make_local_label(module_info, pred_id, proc_id, int, label).
|
|
:- mode code_util__make_local_label(in, in, in, in, out) is det.
|
|
|
|
:- pred code_util__make_proc_label(module_info, pred_id, proc_id, proc_label).
|
|
:- mode code_util__make_proc_label(in, in, in, out) is det.
|
|
|
|
:- pred code_util__make_uni_label(module_info, type_id, int, proc_label).
|
|
:- mode code_util__make_uni_label(in, in, in, out) is det.
|
|
|
|
:- pred code_util__arg_loc_to_register(arg_loc, reg).
|
|
:- mode code_util__arg_loc_to_register(in, out) is det.
|
|
|
|
% Determine whether a goal might allocate some heap space,
|
|
% i.e. whether it contains any construction unifications
|
|
% or predicate calls.
|
|
|
|
:- pred code_util__goal_may_allocate_heap(hlds__goal).
|
|
:- mode code_util__goal_may_allocate_heap(in) is semidet.
|
|
|
|
:- pred code_util__goal_list_may_allocate_heap(list(hlds__goal)).
|
|
:- mode code_util__goal_list_may_allocate_heap(in) is semidet.
|
|
|
|
% Negate a condition.
|
|
% This is used mostly just to make the generated code more readable.
|
|
|
|
:- pred code_util__neg_rval(rval, rval).
|
|
:- mode code_util__neg_rval(in, out) is det.
|
|
|
|
:- pred code_util__negate_the_test(list(instruction), list(instruction)).
|
|
:- mode code_util__negate_the_test(in, out) is det.
|
|
|
|
:- pred code_util__compiler_generated(pred_info).
|
|
:- mode code_util__compiler_generated(in) is semidet.
|
|
|
|
:- pred code_util__predinfo_is_builtin(module_info, pred_info).
|
|
:- mode code_util__predinfo_is_builtin(in, in) is semidet.
|
|
|
|
:- pred code_util__is_builtin(module_info, pred_id, proc_id, is_builtin).
|
|
:- mode code_util__is_builtin(in, in, in, out) is det.
|
|
|
|
:- pred code_util__builtin_binop(string, int, binary_op).
|
|
:- mode code_util__builtin_binop(in, in, out) is semidet.
|
|
:- mode code_util__builtin_binop(out, out, in) is semidet.
|
|
|
|
:- pred code_util__builtin_unop(string, int, unary_op).
|
|
:- mode code_util__builtin_unop(in, in, out) is semidet.
|
|
:- mode code_util__builtin_unop(out, out, in) is semidet.
|
|
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- implementation.
|
|
:- import_module type_util, list, map, require, std_util.
|
|
|
|
%---------------------------------------------------------------------------%
|
|
|
|
code_util__make_local_entry_label(ModuleInfo, PredId, ProcId, Label) :-
|
|
code_util__make_proc_label(ModuleInfo, PredId, ProcId, ProcLabel),
|
|
module_info_preds(ModuleInfo, Preds),
|
|
map__lookup(Preds, PredId, PredInfo),
|
|
(
|
|
pred_info_is_exported(PredInfo)
|
|
->
|
|
Label = exported(ProcLabel)
|
|
;
|
|
Label = local(ProcLabel)
|
|
).
|
|
|
|
code_util__make_local_label(ModuleInfo, PredId, ProcId, LabelNum, Label) :-
|
|
code_util__make_proc_label(ModuleInfo, PredId, ProcId, ProcLabel),
|
|
Label = local(ProcLabel, LabelNum, unknown).
|
|
|
|
%-----------------------------------------------------------------------------%
|
|
|
|
code_util__make_proc_label(ModuleInfo, PredId, ProcId, ProcLabel) :-
|
|
predicate_module(ModuleInfo, PredId, ModuleName),
|
|
predicate_name(ModuleInfo, PredId, PredName),
|
|
( string__append("__", _, PredName) ->
|
|
module_info_preds(ModuleInfo, Preds),
|
|
map__lookup(Preds, PredId, PredInfo),
|
|
pred_info_arg_types(PredInfo, _TypeVarSet, ArgTypes),
|
|
% XXX This is a kludge!
|
|
% For compiler-generated type-specific predicates,
|
|
% we should really store the type as a separate
|
|
% field in pred_info.
|
|
% Instead we use some nasty hacks:
|
|
% for __Index__(...TypeInfos..., T, int)
|
|
% we use the type of the second last argument,
|
|
% and for __Compare__(...TypeInfos..., comparison_result, T, T)
|
|
% and __Unify__(...TypeInfos..., T, T) we use the
|
|
% type of the last argument.
|
|
(
|
|
PredName = "__Index__",
|
|
list__reverse(ArgTypes, [_, Type | _]),
|
|
type_to_type_id(Type, TypeId0, _)
|
|
->
|
|
TypeId = TypeId0
|
|
;
|
|
( PredName = "__Unify__" ; PredName = "__Compare__" ),
|
|
list__reverse(ArgTypes, [Type | _]),
|
|
type_to_type_id(Type, TypeId0, _)
|
|
->
|
|
TypeId = TypeId0
|
|
;
|
|
string__append_list(["code_util__make_proc_label:\n",
|
|
"cannot make label for special pred `",
|
|
PredName, "'"], ErrorMessage),
|
|
error(ErrorMessage)
|
|
),
|
|
type_util__type_id_name(ModuleInfo, TypeId, TypeName),
|
|
type_util__type_id_arity(ModuleInfo, TypeId, Arity),
|
|
ProcLabel = special_proc(ModuleName, PredName, TypeName,
|
|
Arity, ProcId)
|
|
;
|
|
predicate_arity(ModuleInfo, PredId, Arity),
|
|
ProcLabel = proc(ModuleName, PredName, Arity, ProcId)
|
|
).
|
|
|
|
code_util__make_uni_label(ModuleInfo, TypeId, UniModeNum, ProcLabel) :-
|
|
type_util__type_id_module(ModuleInfo, TypeId, ModuleName),
|
|
type_util__type_id_name(ModuleInfo, TypeId, TypeName),
|
|
type_util__type_id_arity(ModuleInfo, TypeId, Arity),
|
|
ProcLabel = special_proc(ModuleName, "__Unify__", TypeName, Arity,
|
|
UniModeNum).
|
|
|
|
%-----------------------------------------------------------------------------%
|
|
|
|
code_util__arg_loc_to_register(ArgLoc, r(ArgLoc)).
|
|
|
|
%-----------------------------------------------------------------------------%
|
|
|
|
code_util__predinfo_is_builtin(_ModuleInfo, PredInfo) :-
|
|
pred_info_name(PredInfo, PredName),
|
|
pred_info_arity(PredInfo, Arity),
|
|
code_util__builtin(PredName, Arity).
|
|
|
|
code_util__is_builtin(ModuleInfo, PredId0, _PredMode0, IsBuiltin) :-
|
|
predicate_name(ModuleInfo, PredId0, PredName),
|
|
predicate_arity(ModuleInfo, PredId0, Arity),
|
|
(
|
|
(
|
|
code_util__builtin_binop(PredName, Arity, _)
|
|
;
|
|
code_util__builtin_unop(PredName, Arity, _)
|
|
)
|
|
->
|
|
is_builtin__make_builtin(yes, yes, IsBuiltin)
|
|
;
|
|
PredName = "call"
|
|
->
|
|
is_builtin__make_builtin(yes, no, IsBuiltin)
|
|
;
|
|
is_builtin__make_builtin(no, no, IsBuiltin)
|
|
).
|
|
|
|
% XXX module qualifiers
|
|
|
|
:- pred code_util__builtin(string, int).
|
|
:- mode code_util__builtin(in, in) is semidet.
|
|
|
|
code_util__builtin(PredName, Arity) :-
|
|
( code_util__builtin_binop(PredName, Arity, _)
|
|
; code_util__builtin_unop(PredName, Arity, _)
|
|
; PredName = "call"
|
|
).
|
|
|
|
code_util__builtin_binop("builtin_plus", 3, (+)).
|
|
code_util__builtin_binop("builtin_minus", 3, (-)).
|
|
code_util__builtin_binop("builtin_times", 3, (*)).
|
|
code_util__builtin_binop("builtin_div", 3, (/)).
|
|
code_util__builtin_binop("builtin_mod", 3, (mod)).
|
|
code_util__builtin_binop("builtin_left_shift", 3, (<<)).
|
|
code_util__builtin_binop("builtin_right_shift", 3, (>>)).
|
|
code_util__builtin_binop("builtin_bit_and", 3, (&)).
|
|
code_util__builtin_binop("builtin_bit_or", 3, ('|')).
|
|
% Need single quotes around '|' for Sicstus Prolog
|
|
code_util__builtin_binop("builtin_bit_xor", 3, (^)).
|
|
code_util__builtin_binop(">", 2, (>)).
|
|
code_util__builtin_binop("<", 2, (<)).
|
|
code_util__builtin_binop(">=", 2, (>=)).
|
|
code_util__builtin_binop("=<", 2, (<=)).
|
|
code_util__builtin_binop("builtin_float_plus", 3, float_plus).
|
|
code_util__builtin_binop("builtin_float_minus", 3, float_minus).
|
|
code_util__builtin_binop("builtin_float_times", 3, float_times).
|
|
code_util__builtin_binop("builtin_float_divide", 3, float_divide).
|
|
code_util__builtin_binop("builtin_float_gt", 2, float_gt).
|
|
code_util__builtin_binop("builtin_float_lt", 2, float_lt).
|
|
code_util__builtin_binop("builtin_float_ge", 2, float_ge).
|
|
code_util__builtin_binop("builtin_float_le", 2, float_le).
|
|
|
|
code_util__builtin_unop("builtin_bit_neg", 2, bitwise_complement).
|
|
|
|
%-----------------------------------------------------------------------------%
|
|
|
|
% code_util__compiler_generated(PredInfo) should succeed iff
|
|
% the PredInfo is for a compiler generated predicate.
|
|
|
|
code_util__compiler_generated(PredInfo) :-
|
|
pred_info_name(PredInfo, PredName),
|
|
pred_info_arity(PredInfo, PredArity),
|
|
( PredName = "__Unify__", PredArity = 2
|
|
; PredName = "__Compare__", PredArity = 3
|
|
; PredName = "__Index__", PredArity = 2
|
|
).
|
|
|
|
%-----------------------------------------------------------------------------%
|
|
|
|
% This code may _look_ nondeterministic, but it's really semidet,
|
|
% and Mercury is smart enough to know this.
|
|
|
|
code_util__goal_may_allocate_heap(Goal - _GoalInfo) :-
|
|
code_util__goal_may_allocate_heap_2(Goal).
|
|
|
|
:- pred code_util__goal_may_allocate_heap_2(hlds__goal_expr).
|
|
:- mode code_util__goal_may_allocate_heap_2(in) is semidet.
|
|
|
|
code_util__goal_may_allocate_heap_2(call(_, _, _, Builtin, _, _)) :-
|
|
\+ is_builtin__is_inline(Builtin).
|
|
code_util__goal_may_allocate_heap_2(unify(_, _, _, construct(_,_,Args,_), _)) :-
|
|
Args = [_|_].
|
|
code_util__goal_may_allocate_heap_2(some(_Vars, Goal)) :-
|
|
code_util__goal_may_allocate_heap(Goal).
|
|
code_util__goal_may_allocate_heap_2(not(Goal)) :-
|
|
code_util__goal_may_allocate_heap(Goal).
|
|
code_util__goal_may_allocate_heap_2(conj(Goals)) :-
|
|
code_util__goal_list_may_allocate_heap(Goals).
|
|
code_util__goal_may_allocate_heap_2(disj(Goals)) :-
|
|
code_util__goal_list_may_allocate_heap(Goals).
|
|
code_util__goal_may_allocate_heap_2(switch(_Var, _Det, Cases)) :-
|
|
code_util__cases_may_allocate_heap(Cases).
|
|
code_util__goal_may_allocate_heap_2(if_then_else(_Vars, A, B, C)) :-
|
|
(
|
|
code_util__goal_may_allocate_heap(A)
|
|
;
|
|
code_util__goal_may_allocate_heap(B)
|
|
;
|
|
code_util__goal_may_allocate_heap(C)
|
|
).
|
|
|
|
:- pred code_util__cases_may_allocate_heap(list(case)).
|
|
:- mode code_util__cases_may_allocate_heap(in) is semidet.
|
|
|
|
code_util__cases_may_allocate_heap([case(_, Goal) | _]) :-
|
|
code_util__goal_may_allocate_heap(Goal).
|
|
code_util__cases_may_allocate_heap([_ | Cases]) :-
|
|
code_util__cases_may_allocate_heap(Cases).
|
|
|
|
code_util__goal_list_may_allocate_heap([Goal | _]) :-
|
|
code_util__goal_may_allocate_heap(Goal).
|
|
code_util__goal_list_may_allocate_heap([_ | Goals]) :-
|
|
code_util__goal_list_may_allocate_heap(Goals).
|
|
|
|
%-----------------------------------------------------------------------------%
|
|
|
|
% Negate a condition.
|
|
% This is used mostly just to make the generated code more readable.
|
|
|
|
code_util__neg_rval(Rval, NegRval) :-
|
|
( code_util__neg_rval_2(Rval, NegRval0) ->
|
|
NegRval = NegRval0
|
|
;
|
|
NegRval = unop(not, Rval)
|
|
).
|
|
|
|
:- pred code_util__neg_rval_2(rval, rval).
|
|
:- mode code_util__neg_rval_2(in, out) is semidet.
|
|
|
|
code_util__neg_rval_2(const(Const), const(NegConst)) :-
|
|
(
|
|
Const = true, NegConst = false
|
|
;
|
|
Const = false, NegConst = true
|
|
).
|
|
code_util__neg_rval_2(unop(not, Rval), Rval).
|
|
code_util__neg_rval_2(binop(Op, X, Y), binop(NegOp, X, Y)) :-
|
|
code_util__neg_op(Op, NegOp).
|
|
|
|
:- pred code_util__neg_op(binary_op, binary_op).
|
|
:- mode code_util__neg_op(in, out) is semidet.
|
|
|
|
code_util__neg_op(eq, ne).
|
|
code_util__neg_op(ne, eq).
|
|
code_util__neg_op(<, >=).
|
|
code_util__neg_op(<=, >).
|
|
code_util__neg_op(>, <=).
|
|
code_util__neg_op(>=, <).
|
|
code_util__neg_op(str_eq, str_ne).
|
|
code_util__neg_op(str_ne, str_eq).
|
|
code_util__neg_op(str_lt, str_ge).
|
|
code_util__neg_op(str_le, str_gt).
|
|
code_util__neg_op(str_gt, str_le).
|
|
code_util__neg_op(str_ge, str_lt).
|
|
code_util__neg_op(float_eq, float_ne).
|
|
code_util__neg_op(float_ne, float_eq).
|
|
code_util__neg_op(float_lt, float_ge).
|
|
code_util__neg_op(float_le, float_gt).
|
|
code_util__neg_op(float_gt, float_le).
|
|
code_util__neg_op(float_ge, float_lt).
|
|
|
|
code_util__negate_the_test([], _) :-
|
|
error("code_util__negate_the_test on empty list").
|
|
code_util__negate_the_test([Instr0 | Instrs0], Instrs) :-
|
|
( Instr0 = if_val(Test, Target) - Comment ->
|
|
code_util__neg_rval(Test, NewTest),
|
|
Instrs = [if_val(NewTest, Target) - Comment]
|
|
;
|
|
code_util__negate_the_test(Instrs0, Instrs1),
|
|
Instrs = [Instr0 | Instrs1]
|
|
).
|
|
|
|
%-----------------------------------------------------------------------------%
|