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https://github.com/Mercury-Language/mercury.git
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f2c99cc0b2
compiler/cse_detection.m:
compiler/ml_lookup_switch.m:
compiler/ml_switch_gen.m:
compiler/ml_target_util.m:
compiler/switch_util.m:
As above.
130 lines
5.1 KiB
Mathematica
130 lines
5.1 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ft=mercury ts=4 sw=4 et
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%---------------------------------------------------------------------------%
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% Copyright (C) 2011 The University of Melbourne.
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% Copyright (C) 2013-2015, 2017-2020, 2023 The Mercury team.
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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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%
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% File: ml_target_util.m.
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% Author: zs.
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%
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% This module contains utility predicates dealing with target languages.
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%
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%---------------------------------------------------------------------------%
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:- module ml_backend.ml_target_util.
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:- interface.
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:- import_module libs.
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:- import_module libs.globals.
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:- import_module parse_tree.
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:- import_module parse_tree.prog_data.
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:- import_module bool.
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%---------------------------------------------------------------------------%
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% Return `yes' iff the target language supports the specified construct.
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%
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% Note that for int switches one of our target languages (Java) does not
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% support switching on 64-bit values, so we treat that case separately.
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% The rest of the compiler does assume that all MLDS target languages
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% do support switches on all integer types that are smaller than that,
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%
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:- func globals_target_supports_int64_switch(globals) = bool.
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:- func globals_target_supports_int_type_switch(globals, int_type) = bool.
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:- func globals_target_supports_string_switch(globals) = bool.
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:- func globals_target_supports_goto(globals) = bool.
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:- func globals_target_supports_computed_goto(globals) = bool.
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:- func globals_target_supports_break_and_continue(globals) = bool.
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:- func target_supports_int64_switch(compilation_target) = bool.
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:- func target_supports_string_switch(compilation_target) = bool.
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:- func target_supports_goto(compilation_target) = bool.
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:- func target_supports_computed_goto(compilation_target) = bool.
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:- func target_supports_break_and_continue(compilation_target) = bool.
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% This should return `yes' iff downcasts are not needed.
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%
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:- func target_supports_inheritence(compilation_target) = bool.
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%---------------------------------------------------------------------------%
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%---------------------------------------------------------------------------%
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:- implementation.
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globals_target_supports_int64_switch(Globals) = SupportsInt64Switch :-
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globals.get_target(Globals, Target),
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SupportsInt64Switch = target_supports_int64_switch(Target).
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globals_target_supports_int_type_switch(Globals, IntType)
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= SupportsIntTypeSwitch :-
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(
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( IntType = int_type_int
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; IntType = int_type_uint
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; IntType = int_type_int8
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; IntType = int_type_uint8
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; IntType = int_type_int16
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; IntType = int_type_uint16
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; IntType = int_type_int32
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; IntType = int_type_uint32
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),
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SupportsIntTypeSwitch = yes
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;
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( IntType = int_type_int64
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; IntType = int_type_uint64
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),
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SupportsIntTypeSwitch = globals_target_supports_int64_switch(Globals)
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).
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globals_target_supports_string_switch(Globals) = SupportsStringSwitch :-
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globals.get_target(Globals, Target),
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SupportsStringSwitch = target_supports_string_switch(Target).
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globals_target_supports_goto(Globals) = SupportsGoto :-
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globals.get_target(Globals, Target),
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SupportsGoto = target_supports_goto(Target).
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globals_target_supports_computed_goto(Globals) = SupportsComputedGoto :-
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globals.get_target(Globals, Target),
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SupportsComputedGoto = target_supports_computed_goto(Target).
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globals_target_supports_break_and_continue(Globals) = SupportsBreakContinue :-
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globals.get_target(Globals, Target),
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SupportsBreakContinue = target_supports_break_and_continue(Target).
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%---------------------------------------------------------------------------%
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target_supports_int64_switch(target_c) = yes.
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target_supports_int64_switch(target_csharp) = yes.
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target_supports_int64_switch(target_java) = no.
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target_supports_string_switch(target_c) = no.
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target_supports_string_switch(target_csharp) = yes.
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target_supports_string_switch(target_java) = yes.
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% String switches were added in Java 7, and we now require 8.
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target_supports_goto(target_c) = yes.
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% XXX C# *does* support gotos but mlds_to_cs_stmt.m currently aborts
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% if it encounters them.
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target_supports_goto(target_csharp) = no.
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target_supports_goto(target_java) = no.
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target_supports_computed_goto(target_c) = yes.
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target_supports_computed_goto(target_csharp) = no.
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target_supports_computed_goto(target_java) = no.
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target_supports_break_and_continue(target_c) = yes.
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target_supports_break_and_continue(target_csharp) = yes.
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target_supports_break_and_continue(target_java) = yes.
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target_supports_inheritence(target_c) = no.
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target_supports_inheritence(target_csharp) = yes.
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target_supports_inheritence(target_java) = yes.
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%---------------------------------------------------------------------------%
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:- end_module ml_backend.ml_target_util.
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%---------------------------------------------------------------------------%
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