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mercury/grade_lib/grade_structure.m
Julien Fischer 40575f7cce Update more copyright notices.
browser/*.m:
grade_lib/*.m:
mdbcomp/*.m:
profiler/*.m:
ssdb/*.m:
     As above.
2024-12-29 20:53:29 +11:00

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%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%
% Copyright (C) 2016, 2018-2020, 2022, 2024 The Mercury team.
% This file is distributed under the terms specified in COPYING.LIB.
%---------------------------------------------------------------------------%
%
% The grade structure is intended to be the tightest possible type
% for representing grades. The intention is that
%
% - the grade structure should be able to represent ALL valid grades, and
% - the grade structure should be able to represent NO invalid grades.
%
% The idea is that if a grade_vars term represents a valid grade,
% then it should be possible to convert it to a grade structure by calling
% grade_vars_to_grade_structure, but if it represents an invalid grade,
% the conversion will fail. Since we create grade_vars structures by
% solving partial grade specifications, and this solving process is supposed
% to generate representations of only valid grades, the failure of the
% conversion will cause grade_vars_to_grade_structure to throw an exception.
%
:- module grade_lib.grade_structure.
:- interface.
:- import_module grade_lib.grade_vars.
%---------------------------------------------------------------------------%
%
% XXX We should put the fields here into a more logical order.
% The question is: *which* logical order? The order used by
% runtime/mercury_grade.h, which is also used by other parts of the system,
% such as scripts/canonical_grade, is a historical accident, and NOT logical.
%
:- type grade_structure
---> grade_pregen(pregen_grade)
; grade_llds(llds_grade)
; grade_mlds(mlds_grade).
%---------------------%
:- type pregen_grade
---> pregen_grade(
pregen_kind
% implies grade_var_low_tag_bits_use_2
% implies grade_var_stack_len_std
% implies grade_var_trail_no
% implies grade_var_minmodel_no
% implies grade_var_thread_safe_c_no
% implies grade_var_gc_bdw
% implies grade_var_deep_prof_no
% implies grade_var_mprof_call_no
% implies grade_var_mprof_time_no
% implies grade_var_mprof_memory_no
% implies grade_var_term_size_prof_no
% implies grade_var_debug_none
% implies grade_var_rbmm_no
% implies grade_var_rbmm_debug_no
% implies grade_var_rbmm_prof_no
% implies grade_var_tscope_prof_no
% implies grade_var_merc_float_is_boxed_c_double
).
:- type pregen_kind
---> pregen_mlds_hlc
; pregen_llds_none
; pregen_llds_reg
; pregen_llds_asm_fast.
%---------------------%
:- type llds_grade
---> llds_grade(
grade_var_gcc_conf,
grade_var_stack_len,
llds_thread_safe_minmodel,
grade_var_merc_file,
grade_var_low_tag_bits_use,
grade_var_merc_float
).
:- type llds_thread_safe_minmodel
---> llds_thread_safe_no_minmodel_no(
c_gc,
grade_var_trail,
llds_perf_prof,
grade_var_term_size_prof,
grade_var_debug,
llds_rbmm
% implicitly grade_var_tscope_prof_no
)
; llds_thread_safe_no_minmodel_yes(
llds_minmodel_kind,
llds_minmodel_gc,
% implicitly grade_var_trail_no
% implicitly llds_perf_prof_none
% implicitly grade_var_term_size_prof_no
grade_var_debug
% implicitly grade_var_rbmm_no
% implicitly grade_var_tscope_prof_no
)
; llds_thread_safe_yes_minmodel_no(
thread_safe_c_gc,
grade_var_trail, % trailing works only in the
% absence of parallel conjunction
% implicitly llds_perf_prof_none
% implicitly grade_var_term_size_prof_no
% implicitly grade_var_debug_none
% implicitly grade_var_rbmm_no
grade_var_tscope_prof
).
% This type differs from grade_var_gc in not having
% grade_var_gc_target_native, since C has no native gc.
:- type c_gc
---> c_gc_none
; c_gc_bdw
; c_gc_bdw_debug
; c_gc_accurate
; c_gc_history.
% This type encodes the allowed combinations of the values of
% grade_var_deep_prof and grade_var_mprof_{call,time,memory}.
:- type llds_perf_prof
---> llds_perf_prof_none
; llds_perf_prof_deep
; llds_perf_prof_mprof(
grade_var_mprof_time,
grade_var_mprof_memory
).
% This type encodes the allowed combinations of the values of
% grade_var_rbmm and grade_var_rbmm_{debug,prof}.
:- type llds_rbmm
---> llds_rbmm_no
; llds_rbmm_yes(
grade_var_rbmm_debug,
grade_var_rbmm_prof
).
% This type differs from grade_var_minmodel in not having
% grade_var_minmodel_no, since this type is not used when that is
% the selected value of grade_var_minmodel.
:- type llds_minmodel_kind
---> lmk_stack_copy
; lmk_stack_copy_debug
; lmk_own_stack
; lmk_own_stack_debug.
% This type differs from c_gc in being restricted to just the gc systems
% that thread safe LLDS grades can work with.
:- type thread_safe_c_gc
---> thread_safe_c_gc_none
; thread_safe_c_gc_bdw
; thread_safe_c_gc_bdw_debug.
% This type differs from c_gc in being restricted to just the gc systems
% that minimal model tabling can work with.
:- type llds_minmodel_gc
---> llds_mm_gc_bdw
; llds_mm_gc_bdw_debug.
%---------------------%
:- type mlds_grade
---> mlds_grade(
mlds_target,
grade_var_target_debug
).
:- type mlds_target
---> mlds_target_c(
mlds_c_thread_safe,
grade_var_trail,
grade_var_merc_file,
grade_var_low_tag_bits_use,
grade_var_merc_float
)
; mlds_target_csharp(
grade_var_ssdebug
)
; mlds_target_java(
grade_var_ssdebug
).
:- type mlds_c_thread_safe
---> mlds_c_thread_safe_no(
c_gc,
mlds_c_perf_prof,
grade_var_ssdebug
)
; mlds_c_thread_safe_yes(
thread_safe_c_gc
% implies no perf prof
% implies no ssdebug
).
% This type encodes the allowed combinations of the values of
% grade_var_mprof_{call,time,memory}.
:- type mlds_c_perf_prof
---> mlds_c_perf_prof_none
; mlds_c_perf_prof_mprof(
grade_var_mprof_time,
grade_var_mprof_memory
).
%---------------------------------------------------------------------------%
% See the main comment at the top of the module.
%
:- func grade_vars_to_grade_structure(grade_vars) = grade_structure.
%---------------------------------------------------------------------------%
%---------------------------------------------------------------------------%
:- implementation.
:- import_module require.
%---------------------------------------------------------------------------%
grade_vars_to_grade_structure(GradeVars) = GradeStructure :-
% XXX We want to verify that every grade variable is used on every path,
% for one of these three purposes: (a) to make a decision, (c) to check
% that it has the expected value, or (c) to record its value in the
% structured grade.
%
% We pick up the values of the arguments other than Pregen and Backend
% in separate deconstructions in each arm of the switch on Backend,
% to give us a singleton variable warning if don't handle a grade var
% in an arm.
%
% Unfortunately, I (zs) don't see how to repeat the trick for the switch
% on Target in the mlds case: having two deconstructs that each pick up
% *some* arguments is vulnerable to not picking up some arguments
% in *either*.
GradeVars = grade_vars(Pregen, Backend, _, _, _, _, _,
_, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _),
(
Pregen = grade_var_pregen_yes,
GradeVars = grade_vars(_Pregen, _Backend, Target,
GccConf, LowTagBitsUse, StackLen, Trail,
MinimalModel, ThreadSafe, Gc,
DeepProf, MprofCall, MprofTime, MprofMemory, TScopeProf,
TermSizeProf, Debug, SSDebug, TargetDebug,
RBMM, RBMMDebug, RBMMProf, MercFile, MercFloat),
expect(unify(Target, grade_var_target_c), $pred,
"Target != grade_var_target_c"),
expect(unify(LowTagBitsUse, grade_var_low_tag_bits_use_2), $pred,
"pregen but LowTagBitsUse != grade_var_low_tag_bits_use_2"),
% XXX This is for version 0 of the specification,
% which has stack_len_std as the preferred stack_len.
expect(unify(StackLen, grade_var_stack_len_std), $pred,
"pregen but StackLen != grade_var_stack_len_std"),
expect(unify(Trail, grade_var_trail_no), $pred,
"pregen but Trail != grade_var_trail_no"),
expect(unify(MinimalModel, grade_var_minmodel_no), $pred,
"pregen but MinimalModel != grade_var_minmodel_no"),
expect(unify(ThreadSafe, grade_var_thread_safe_c_no), $pred,
"pregen but ThreadSafe != grade_var_thread_safe_c_no"),
expect(unify(Gc, grade_var_gc_bdw), $pred,
"pregen but Gc != grade_var_gc_bdw"),
expect(unify(DeepProf, grade_var_deep_prof_no), $pred,
"pregen but DeepProf != grade_var_deep_prof_no"),
expect(unify(MprofCall, grade_var_mprof_call_no), $pred,
"pregen but MprofCall != grade_var_mprof_call_no"),
expect(unify(MprofTime, grade_var_mprof_time_no), $pred,
"pregen but MprofTime != grade_var_mprof_time_no"),
expect(unify(MprofMemory, grade_var_mprof_memory_no), $pred,
"pregen but MprofMemory != grade_var_mprof_memory_no"),
expect(unify(TScopeProf, grade_var_tscope_prof_no), $pred,
"pregen but TScopeProf != grade_var_tscope_prof_no"),
expect(unify(TermSizeProf, grade_var_term_size_prof_no), $pred,
"pregen but TermSizeProf != grade_var_term_size_prof_no"),
expect(unify(Debug, grade_var_debug_none), $pred,
"pregen but Debug != grade_var_debug_none"),
expect(unify(SSDebug, grade_var_ssdebug_no), $pred,
"pregen but SSDebug != grade_var_ssdebug_no"),
expect(unify(TargetDebug, grade_var_target_debug_no), $pred,
"pregen but TargetDebug != grade_var_target_debug_no"),
expect(unify(RBMM, grade_var_rbmm_no), $pred,
"pregen but RBMM != grade_var_rbmm_no"),
expect(unify(RBMMDebug, grade_var_rbmm_debug_no), $pred,
"pregen but RBMMDebug != grade_var_rbmm_debug_no"),
expect(unify(RBMMProf, grade_var_rbmm_prof_no), $pred,
"pregen but RBMMProf != grade_var_rbmm_prof_no"),
expect(unify(MercFile, grade_var_merc_file_no), $pred,
"pregen but MercFile != grade_var_merc_file_no"),
expect(unify(MercFloat, grade_var_merc_float_is_boxed_c_double), $pred,
"pregen but MercFloat != grade_var_merc_float_is_boxed_c_double"),
(
Backend = grade_var_backend_llds,
(
GccConf = grade_var_gcc_conf_none,
PregenKind = pregen_llds_none
;
GccConf = grade_var_gcc_conf_reg,
PregenKind = pregen_llds_reg
;
GccConf = grade_var_gcc_conf_jump,
unexpected($pred, "pregen but jump")
;
GccConf = grade_var_gcc_conf_fast,
unexpected($pred, "pregen but fast")
;
GccConf = grade_var_gcc_conf_asm_jump,
unexpected($pred, "pregen but asm_jump")
;
GccConf = grade_var_gcc_conf_asm_fast,
PregenKind = pregen_llds_asm_fast
)
;
Backend = grade_var_backend_mlds,
PregenKind = pregen_mlds_hlc
),
PregenGrade = pregen_grade(PregenKind),
GradeStructure = grade_pregen(PregenGrade)
;
Pregen = grade_var_pregen_no,
% XXX The order of the arguments of llds_grade and mlds_grade
% we generate may differ from the order in runtime/mercury_grade.h,
% or the canonical order when targeting non-C languages.
% XXX We should consider imposing a standard order.
(
Backend = grade_var_backend_llds,
GradeVars = grade_vars(_Pregen, _Backend, Target,
GccConf, LowTagBitsUse, StackLen, Trail,
MinimalModel, ThreadSafe, Gc,
DeepProf, MprofCall, MprofTime, MprofMemory, TScopeProf,
TermSizeProf, Debug, SSDebug, TargetDebug,
RBMM, RBMMDebug, RBMMProf, MercFile, MercFloat),
expect(unify(Target, grade_var_target_c), $pred,
"Target != grade_var_target_c"),
expect(unify(TargetDebug, grade_var_target_debug_no), $pred,
"TargetDebug != grade_var_target_debug_no"),
expect(unify(SSDebug, grade_var_ssdebug_no), $pred,
"SSDebug != grade_var_ssdebug_no"),
(
ThreadSafe = grade_var_thread_safe_target_native,
unexpected($pred, "llds but thread_safe_target_native")
;
ThreadSafe = grade_var_thread_safe_c_no,
(
MinimalModel = grade_var_minmodel_no,
encode_c_gc(Gc, CGc),
(
DeepProf = grade_var_deep_prof_no,
(
MprofCall = grade_var_mprof_call_no,
expect(unify(MprofTime, grade_var_mprof_time_no),
$pred, "MprofTime != grade_var_mprof_time_no"),
expect(
unify(MprofMemory, grade_var_mprof_memory_no),
$pred,
"MprofMemory != grade_var_mprof_memory_no"),
LldsPerfProf = llds_perf_prof_none
;
MprofCall = grade_var_mprof_call_yes,
LldsPerfProf =
llds_perf_prof_mprof(MprofTime, MprofMemory)
)
;
DeepProf = grade_var_deep_prof_yes,
expect(unify(MprofCall, grade_var_mprof_call_no),
$pred,
"MprofCall != grade_var_mprof_call_no"),
expect(unify(MprofTime, grade_var_mprof_time_no),
$pred,
"MprofTime != grade_var_mprof_time_no"),
expect(unify(MprofMemory, grade_var_mprof_memory_no),
$pred,
"MprofMemory != grade_var_mprof_memory_no"),
LldsPerfProf = llds_perf_prof_deep
),
(
RBMM = grade_var_rbmm_no,
expect(unify(RBMMDebug, grade_var_rbmm_debug_no),
$pred,
"RBMMDebug != grade_var_rbmm_debug_no"),
expect(unify(RBMMProf, grade_var_rbmm_prof_no),
$pred,
"RBMMProf != grade_var_rbmm_prof_no"),
LldsRBMM = llds_rbmm_no
;
RBMM = grade_var_rbmm_yes,
LldsRBMM = llds_rbmm_yes(RBMMDebug, RBMMProf)
),
expect(unify(TScopeProf, grade_var_tscope_prof_no), $pred,
"TScopeProf != grade_var_tscope_prof_no"),
LldsTSMinModel = llds_thread_safe_no_minmodel_no(CGc,
Trail, LldsPerfProf, TermSizeProf, Debug, LldsRBMM)
;
(
MinimalModel = grade_var_minmodel_stack_copy,
MinimalModelKind = lmk_stack_copy
;
MinimalModel = grade_var_minmodel_stack_copy_debug,
MinimalModelKind = lmk_stack_copy_debug
;
MinimalModel = grade_var_minmodel_own_stack,
MinimalModelKind = lmk_own_stack
;
MinimalModel = grade_var_minmodel_own_stack_debug,
MinimalModelKind = lmk_own_stack_debug
),
(
Gc = grade_var_gc_none,
unexpected($pred, "minimal model, Gc = none")
;
Gc = grade_var_gc_target_native,
unexpected($pred, "Target = c, Gc = target_native")
;
Gc = grade_var_gc_bdw,
MinModelGc = llds_mm_gc_bdw
;
Gc = grade_var_gc_bdw_debug,
MinModelGc = llds_mm_gc_bdw_debug
;
Gc = grade_var_gc_accurate,
unexpected($pred, "minimal model, Gc = accurate")
;
Gc = grade_var_gc_history,
unexpected($pred, "minimal model, Gc = history")
),
expect(unify(Trail, grade_var_trail_no), $pred,
"Trail != grade_var_trail_no"),
expect(unify(DeepProf, grade_var_deep_prof_no), $pred,
"DeepProf != grade_var_deep_prof_no"),
expect(unify(MprofCall, grade_var_mprof_call_no), $pred,
"MprofCall != grade_var_mprof_call_no"),
expect(unify(MprofTime, grade_var_mprof_time_no), $pred,
"MprofTime != grade_var_mprof_time_no"),
expect(unify(MprofMemory, grade_var_mprof_memory_no),
$pred,
"MprofMemory != grade_var_mprof_memory_no"),
expect(unify(TermSizeProf, grade_var_term_size_prof_no),
$pred,
"TermSizeProf != grade_var_term_size_prof_no"),
expect(unify(RBMM, grade_var_rbmm_no), $pred,
"RBMM != grade_var_rbmm_no"),
expect(unify(RBMMDebug, grade_var_rbmm_debug_no), $pred,
"RBMMDebug != grade_var_rbmm_debug_no"),
expect(unify(RBMMProf, grade_var_rbmm_prof_no), $pred,
"RBMMProf != grade_var_rbmm_prof_no"),
LldsTSMinModel = llds_thread_safe_no_minmodel_yes(
MinimalModelKind, MinModelGc, Debug)
)
;
ThreadSafe = grade_var_thread_safe_c_yes,
expect(unify(MinimalModel, grade_var_minmodel_no), $pred,
"MinModel != grade_var_minmodel_no"),
encode_thread_safe_c_gc(Gc, ThreadSafeCGc),
expect(unify(DeepProf, grade_var_deep_prof_no), $pred,
"DeepProf != grade_var_deep_prof_no"),
expect(unify(MprofCall, grade_var_mprof_call_no), $pred,
"MprofCall != grade_var_mprof_call_no"),
expect(unify(MprofTime, grade_var_mprof_time_no), $pred,
"MprofTime != grade_var_mprof_time_no"),
expect(unify(MprofMemory, grade_var_mprof_memory_no), $pred,
"MprofMemory != grade_var_mprof_memory_no"),
expect(unify(TermSizeProf, grade_var_term_size_prof_no), $pred,
"TermSizeProf != grade_var_term_size_prof_no"),
expect(unify(Debug, grade_var_debug_none), $pred,
"Debug != grade_var_debug_none"),
expect(unify(RBMM, grade_var_rbmm_no), $pred,
"RBMM != grade_var_rbmm_no"),
expect(unify(RBMMDebug, grade_var_rbmm_debug_no), $pred,
"RBMMDebug != grade_var_rbmm_debug_no"),
expect(unify(RBMMProf, grade_var_rbmm_prof_no), $pred,
"RBMMProf != grade_var_rbmm_prof_no"),
LldsTSMinModel =
llds_thread_safe_yes_minmodel_no(ThreadSafeCGc,
Trail, TScopeProf)
),
LldsGrade = llds_grade(GccConf, StackLen, LldsTSMinModel,
MercFile, LowTagBitsUse, MercFloat),
GradeStructure = grade_llds(LldsGrade)
;
Backend = grade_var_backend_mlds,
GradeVars = grade_vars(_Pregen, _Backend, Target,
GccConf, LowTagBitsUse, StackLen, Trail,
MinimalModel, ThreadSafe, Gc,
DeepProf, MprofCall, MprofTime, MprofMemory, TScopeProf,
TermSizeProf, Debug, SSDebug, TargetDebug,
RBMM, RBMMDebug, RBMMProf, MercFile, MercFloat),
expect(unify(GccConf, grade_var_gcc_conf_none), $pred,
"GccConf != grade_var_gcc_conf_none"),
expect(unify(StackLen, grade_var_stack_len_std), $pred,
"StackLen != grade_var_stack_len_std"),
expect(unify(MinimalModel, grade_var_minmodel_no), $pred,
"MinimalModel != grade_var_minmodel_no"),
expect(unify(DeepProf, grade_var_deep_prof_no), $pred,
"DeepProf != grade_var_deep_prof_no"),
expect(unify(TScopeProf, grade_var_tscope_prof_no), $pred,
"TScopeProf != grade_var_tscope_prof_no"),
expect(unify(TermSizeProf, grade_var_term_size_prof_no), $pred,
"TermSizeProf != grade_var_term_size_prof_no"),
expect(unify(Debug, grade_var_debug_none), $pred,
"Debug != grade_var_debug_none"),
expect(unify(RBMM, grade_var_rbmm_no), $pred,
"RBMM != grade_var_rbmm_no"),
expect(unify(RBMMDebug, grade_var_rbmm_debug_no), $pred,
"RBMMDebug != grade_var_rbmm_debug_no"),
expect(unify(RBMMProf, grade_var_rbmm_prof_no), $pred,
"RBMMProf != grade_var_rbmm_prof_no"),
(
Target = grade_var_target_c,
(
ThreadSafe = grade_var_thread_safe_c_no,
encode_c_gc(Gc, CGc),
(
MprofCall = grade_var_mprof_call_no,
expect(unify(MprofTime, grade_var_mprof_time_no),
$pred,
"mprof_call = no but mprof_time != no"),
expect(unify(MprofMemory, grade_var_mprof_memory_no),
$pred,
"mprof_call = no but mprof_memory != no"),
MldsPerfProf = mlds_c_perf_prof_none
;
MprofCall = grade_var_mprof_call_yes,
MldsPerfProf =
mlds_c_perf_prof_mprof(MprofTime, MprofMemory)
),
MldsCThreadSafe =
mlds_c_thread_safe_no(CGc, MldsPerfProf, SSDebug)
;
ThreadSafe = grade_var_thread_safe_c_yes,
encode_thread_safe_c_gc(Gc, ThreadSafeCGc),
expect(unify(MprofCall, grade_var_mprof_call_no), $pred,
"thread_safe = yes but mprof_call != no"),
expect(unify(MprofTime, grade_var_mprof_time_no), $pred,
"thread_safe = yes but mprof_time != no"),
expect(unify(MprofMemory, grade_var_mprof_memory_no),
$pred,
"thread_safe = yes but mprof_memory != no"),
expect(unify(SSDebug, grade_var_ssdebug_no), $pred,
"thread_safe = yes but ssdebug != no"),
MldsCThreadSafe = mlds_c_thread_safe_yes(ThreadSafeCGc)
;
ThreadSafe = grade_var_thread_safe_target_native,
unexpected($pred, "mlds c but thread_safe_target_native")
),
TargetC = mlds_target_c(MldsCThreadSafe, Trail, MercFile,
LowTagBitsUse, MercFloat),
MldsGrade = mlds_grade(TargetC, TargetDebug),
GradeStructure = grade_mlds(MldsGrade)
;
( Target = grade_var_target_csharp
; Target = grade_var_target_java
),
expect(unify(ThreadSafe, grade_var_thread_safe_target_native),
$pred,
"ThreadSafe != grade_var_thread_safe_target_native"),
expect(unify(Gc, grade_var_gc_target_native), $pred,
"Gc != grade_var_gc_target_native"),
expect(unify(Trail, grade_var_trail_no), $pred,
"Trail != grade_var_trail_no"),
expect(unify(MprofCall, grade_var_mprof_call_no), $pred,
"MprofCall != grade_var_mprof_call_no"),
expect(unify(MprofTime, grade_var_mprof_time_no), $pred,
"MprofTime != grade_var_mprof_time_no"),
expect(unify(MprofMemory, grade_var_mprof_memory_no), $pred,
"MprofMemory != grade_var_mprof_memory_no"),
% The definition of MR_NEW_MERCURYFILE_STRUCT applies only
% to grades that target C. When targeting other languages,
% we don't insist on MercFile = grade_var_merc_file_no.
(
( MercFloat = grade_var_merc_float_is_boxed_c_double
; MercFloat = grade_var_merc_float_is_unboxed_c_double
)
% We don't care which one.
% XXX Should we, on either backend?
;
MercFloat = grade_var_merc_float_is_unboxed_c_float,
unexpected($pred,
"MercFloat = grade_var_merc_float_is_unboxed_c_float")
),
% We repeat this here in case we later add some function
% symbols to one or both of mlds_target_csharp and
% mlds_target_java.
(
Target = grade_var_target_csharp,
MldsTarget = mlds_target_csharp(SSDebug)
;
Target = grade_var_target_java,
MldsTarget = mlds_target_java(SSDebug)
),
MldsGrade = mlds_grade(MldsTarget, TargetDebug),
GradeStructure = grade_mlds(MldsGrade)
)
)
).
:- pred encode_c_gc(grade_var_gc::in, c_gc::out) is det.
encode_c_gc(Gc, CGc) :-
(
Gc = grade_var_gc_none,
CGc = c_gc_none
;
Gc = grade_var_gc_target_native,
unexpected($pred, "Target = c, Gc = target_native")
;
Gc = grade_var_gc_bdw,
CGc = c_gc_bdw
;
Gc = grade_var_gc_bdw_debug,
CGc = c_gc_bdw_debug
;
Gc = grade_var_gc_accurate,
CGc = c_gc_accurate
;
Gc = grade_var_gc_history,
CGc = c_gc_history
).
:- pred encode_thread_safe_c_gc(grade_var_gc::in, thread_safe_c_gc::out)
is det.
encode_thread_safe_c_gc(Gc, ThreadSafeCGc) :-
(
Gc = grade_var_gc_none,
ThreadSafeCGc = thread_safe_c_gc_none
;
Gc = grade_var_gc_target_native,
unexpected($pred, "Target = c, Gc = target_native")
;
Gc = grade_var_gc_bdw,
ThreadSafeCGc = thread_safe_c_gc_bdw
;
Gc = grade_var_gc_bdw_debug,
ThreadSafeCGc = thread_safe_c_gc_bdw_debug
;
Gc = grade_var_gc_accurate,
unexpected($pred, "thread safe, Gc = accurate")
;
Gc = grade_var_gc_history,
unexpected($pred, "thread safe, Gc = history")
).
%---------------------------------------------------------------------------%
:- end_module grade_lib.grade_structure.
%---------------------------------------------------------------------------%