1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
15 # Separate compilation of a Nit program
16 module separate_compiler
18 import abstract_compiler
20 import rapid_type_analysis
22 # Add separate compiler specific options
23 redef class ToolContext
25 var opt_separate
= new OptionBool("Use separate compilation", "--separate")
27 var opt_no_inline_intern
= new OptionBool("Do not inline call to intern methods", "--no-inline-intern")
28 # --no-union-attribute
29 var opt_no_union_attribute
= new OptionBool("Put primitive attibutes in a box instead of an union", "--no-union-attribute")
30 # --no-shortcut-equate
31 var opt_no_shortcut_equate
= new OptionBool("Always call == in a polymorphic way", "--no-shortcut-equal")
33 var opt_no_tag_primitives
= new OptionBool("Use only boxes for primitive types", "--no-tag-primitives")
35 # --colors-are-symbols
36 var opt_colors_are_symbols
= new OptionBool("Store colors as symbols (link-boost)", "--colors-are-symbols")
38 var opt_trampoline_call
= new OptionBool("Use an indirection when calling", "--trampoline-call")
40 var opt_guard_call
= new OptionBool("Guard VFT calls with a direct call", "--guard-call")
41 # --substitute-monomorph
42 var opt_substitute_monomorph
= new OptionBool("Replace monomorph trampoline with direct call (link-boost)", "--substitute-monomorph")
44 var opt_link_boost
= new OptionBool("Enable all link-boost optimizations", "--link-boost")
46 # --inline-coloring-numbers
47 var opt_inline_coloring_numbers
= new OptionBool("Inline colors and ids (semi-global)", "--inline-coloring-numbers")
48 # --inline-some-methods
49 var opt_inline_some_methods
= new OptionBool("Allow the separate compiler to inline some methods (semi-global)", "--inline-some-methods")
50 # --direct-call-monomorph
51 var opt_direct_call_monomorph
= new OptionBool("Allow the separate compiler to direct call monomorph sites (semi-global)", "--direct-call-monomorph")
52 # --direct-call-monomorph0
53 var opt_direct_call_monomorph0
= new OptionBool("Allow the separate compiler to direct call monomorph sites (semi-global)", "--direct-call-monomorph0")
55 var opt_skip_dead_methods
= new OptionBool("Do not compile dead methods (semi-global)", "--skip-dead-methods")
57 var opt_semi_global
= new OptionBool("Enable all semi-global optimizations", "--semi-global")
58 # --no-colo-dead-methods
59 var opt_colo_dead_methods
= new OptionBool("Force colorization of dead methods", "--colo-dead-methods")
61 var opt_tables_metrics
= new OptionBool("Enable static size measuring of tables used for vft, typing and resolution", "--tables-metrics")
66 self.option_context
.add_option
(self.opt_separate
)
67 self.option_context
.add_option
(self.opt_no_inline_intern
)
68 self.option_context
.add_option
(self.opt_no_union_attribute
)
69 self.option_context
.add_option
(self.opt_no_shortcut_equate
)
70 self.option_context
.add_option
(self.opt_no_tag_primitives
)
71 self.option_context
.add_option
(opt_colors_are_symbols
, opt_trampoline_call
, opt_guard_call
, opt_direct_call_monomorph0
, opt_substitute_monomorph
, opt_link_boost
)
72 self.option_context
.add_option
(self.opt_inline_coloring_numbers
, opt_inline_some_methods
, opt_direct_call_monomorph
, opt_skip_dead_methods
, opt_semi_global
)
73 self.option_context
.add_option
(self.opt_colo_dead_methods
)
74 self.option_context
.add_option
(self.opt_tables_metrics
)
77 redef fun process_options
(args
)
82 if tc
.opt_semi_global
.value
then
83 tc
.opt_inline_coloring_numbers
.value
= true
84 tc
.opt_inline_some_methods
.value
= true
85 tc
.opt_direct_call_monomorph
.value
= true
86 tc
.opt_skip_dead_methods
.value
= true
88 if tc
.opt_link_boost
.value
then
89 tc
.opt_colors_are_symbols
.value
= true
90 tc
.opt_substitute_monomorph
.value
= true
92 if tc
.opt_substitute_monomorph
.value
then
93 tc
.opt_trampoline_call
.value
= true
97 var separate_compiler_phase
= new SeparateCompilerPhase(self, null)
100 class SeparateCompilerPhase
102 redef fun process_mainmodule
(mainmodule
, given_mmodules
) do
103 if not toolcontext
.opt_separate
.value
then return
105 var modelbuilder
= toolcontext
.modelbuilder
106 var analysis
= modelbuilder
.do_rapid_type_analysis
(mainmodule
)
107 modelbuilder
.run_separate_compiler
(mainmodule
, analysis
)
111 redef class ModelBuilder
112 fun run_separate_compiler
(mainmodule
: MModule, runtime_type_analysis
: nullable RapidTypeAnalysis)
115 self.toolcontext
.info
("*** GENERATING C ***", 1)
117 var compiler
= new SeparateCompiler(mainmodule
, self, runtime_type_analysis
)
118 compiler
.do_compilation
119 compiler
.display_stats
122 self.toolcontext
.info
("*** END GENERATING C: {time1-time0} ***", 2)
123 write_and_make
(compiler
)
126 # Count number of invocations by VFT
127 private var nb_invok_by_tables
= 0
128 # Count number of invocations by direct call
129 private var nb_invok_by_direct
= 0
130 # Count number of invocations by inlining
131 private var nb_invok_by_inline
= 0
134 # Singleton that store the knowledge about the separate compilation process
135 class SeparateCompiler
136 super AbstractCompiler
138 redef type VISITOR: SeparateCompilerVisitor
140 # The result of the RTA (used to know live types and methods)
141 var runtime_type_analysis
: nullable RapidTypeAnalysis
143 private var undead_types
: Set[MType] = new HashSet[MType]
144 private var live_unresolved_types
: Map[MClassDef, Set[MType]] = new HashMap[MClassDef, HashSet[MType]]
146 private var type_ids
: Map[MType, Int] is noinit
147 private var type_colors
: Map[MType, Int] is noinit
148 private var opentype_colors
: Map[MType, Int] is noinit
149 protected var method_colors
: Map[PropertyLayoutElement, Int] is noinit
150 protected var attr_colors
: Map[MAttribute, Int] is noinit
153 var file
= new_file
("nit.common")
154 self.header
= new CodeWriter(file
)
155 self.compile_box_kinds
158 redef fun do_compilation
161 compiler
.compile_header
163 var c_name
= mainmodule
.c_name
165 # compile class structures
166 modelbuilder
.toolcontext
.info
("Property coloring", 2)
167 compiler
.new_file
("{c_name}.classes")
168 compiler
.do_property_coloring
169 compiler
.compile_class_infos
170 for m
in mainmodule
.in_importation
.greaters
do
171 for mclass
in m
.intro_mclasses
do
172 #if mclass.kind == abstract_kind or mclass.kind == interface_kind then continue
173 compiler
.compile_class_to_c
(mclass
)
177 # The main function of the C
178 compiler
.new_file
("{c_name}.main")
179 compiler
.compile_nitni_global_ref_functions
180 compiler
.compile_main_function
181 compiler
.compile_finalizer_function
182 compiler
.link_mmethods
185 for m
in mainmodule
.in_importation
.greaters
do
186 modelbuilder
.toolcontext
.info
("Generate C for module {m.full_name}", 2)
187 compiler
.new_file
("{m.c_name}.sep")
188 compiler
.compile_module_to_c
(m
)
191 # compile live & cast type structures
192 modelbuilder
.toolcontext
.info
("Type coloring", 2)
193 compiler
.new_file
("{c_name}.types")
194 compiler
.compile_types
197 # Color and compile type structures and cast information
202 var mtypes
= compiler
.do_type_coloring
204 compiler
.compile_type_to_c
(t
)
206 # compile remaining types structures (useless but needed for the symbol resolution at link-time)
207 for t
in compiler
.undead_types
do
208 if mtypes
.has
(t
) then continue
209 compiler
.compile_type_to_c
(t
)
214 redef fun compile_header_structs
do
215 self.header
.add_decl
("typedef void(*nitmethod_t)(void); /* general C type representing a Nit method. */")
216 self.compile_header_attribute_structs
217 self.header
.add_decl
("struct class \{ int box_kind; nitmethod_t vft[]; \}; /* general C type representing a Nit class. */")
219 # With resolution_table_table, all live type resolution are stored in a big table: resolution_table
220 self.header
.add_decl
("struct type \{ int id; const char *name; int color; short int is_nullable; const struct types *resolution_table; int table_size; int type_table[]; \}; /* general C type representing a Nit type. */")
221 self.header
.add_decl
("struct instance \{ const struct type *type; const struct class *class; nitattribute_t attrs[]; \}; /* general C type representing a Nit instance. */")
222 self.header
.add_decl
("struct types \{ int dummy; const struct type *types[]; \}; /* a list types (used for vts, fts and unresolved lists). */")
223 self.header
.add_decl
("typedef struct instance val; /* general C type representing a Nit instance. */")
225 if not modelbuilder
.toolcontext
.opt_no_tag_primitives
.value
then
226 self.header
.add_decl
("extern const struct class *class_info[];")
227 self.header
.add_decl
("extern const struct type *type_info[];")
231 fun compile_header_attribute_structs
233 if modelbuilder
.toolcontext
.opt_no_union_attribute
.value
then
234 self.header
.add_decl
("typedef void* nitattribute_t; /* general C type representing a Nit attribute. */")
236 self.header
.add_decl
("typedef union \{")
237 self.header
.add_decl
("void* val;")
238 for c
, v
in self.box_kinds
do
239 var t
= c
.mclass_type
241 # `Pointer` reuse the `val` field
242 if t
.mclass
.name
== "Pointer" then continue
244 self.header
.add_decl
("{t.ctype_extern} {t.ctypename};")
246 self.header
.add_decl
("\} nitattribute_t; /* general C type representing a Nit attribute. */")
250 fun compile_box_kinds
252 # Collect all bas box class
253 # FIXME: this is not completely fine with a separate compilation scheme
254 for classname
in ["Int", "Bool", "Char", "Float", "NativeString", "Pointer"] do
255 var classes
= self.mainmodule
.model
.get_mclasses_by_name
(classname
)
256 if classes
== null then continue
257 assert classes
.length
== 1 else print classes
.join
(", ")
258 self.box_kinds
[classes
.first
] = self.box_kinds
.length
+ 1
262 var box_kinds
= new HashMap[MClass, Int]
264 fun box_kind_of
(mclass
: MClass): Int
266 #var pointer_type = self.mainmodule.pointer_type
267 #if mclass.mclass_type.ctype == "val*" or mclass.mclass_type.is_subtype(self.mainmodule, mclass.mclass_type pointer_type) then
268 if mclass
.mclass_type
.ctype_extern
== "val*" then
270 else if mclass
.kind
== extern_kind
and mclass
.name
!= "NativeString" then
271 return self.box_kinds
[self.mainmodule
.get_primitive_class
("Pointer")]
273 return self.box_kinds
[mclass
]
278 fun compile_color_consts
(colors
: Map[Object, Int]) do
280 for m
, c
in colors
do
281 compile_color_const
(v
, m
, c
)
285 fun compile_color_const
(v
: SeparateCompilerVisitor, m
: Object, color
: Int) do
286 if color_consts_done
.has
(m
) then return
287 if m
isa MEntity then
288 if modelbuilder
.toolcontext
.opt_inline_coloring_numbers
.value
then
289 self.provide_declaration
(m
.const_color
, "#define {m.const_color} {color}")
290 else if not modelbuilder
.toolcontext
.opt_colors_are_symbols
.value
or not v
.compiler
.target_platform
.supports_linker_script
then
291 self.provide_declaration
(m
.const_color
, "extern const int {m.const_color};")
292 v
.add
("const int {m.const_color} = {color};")
294 # The color 'C' is the ``address'' of a false static variable 'XC'
295 self.provide_declaration
(m
.const_color
, "#define {m.const_color} ((long)&X{m.const_color})\nextern const void X{m.const_color};")
296 if color
== -1 then color
= 0 # Symbols cannot be negative, so just use 0 for dead things
297 # Teach the linker that the address of 'XC' is `color`.
298 linker_script
.add
("X{m.const_color} = {color};")
303 color_consts_done
.add
(m
)
306 private var color_consts_done
= new HashSet[Object]
308 # colorize classe properties
309 fun do_property_coloring
do
311 var rta
= runtime_type_analysis
314 var poset
= mainmodule
.flatten_mclass_hierarchy
315 var mclasses
= new HashSet[MClass].from
(poset
)
316 var colorer
= new POSetColorer[MClass]
317 colorer
.colorize
(poset
)
319 # The dead methods, still need to provide a dead color symbol
320 var dead_methods
= new Array[MMethod]
322 # lookup properties to build layout with
323 var mmethods
= new HashMap[MClass, Set[PropertyLayoutElement]]
324 var mattributes
= new HashMap[MClass, Set[MAttribute]]
325 for mclass
in mclasses
do
326 mmethods
[mclass
] = new HashSet[PropertyLayoutElement]
327 mattributes
[mclass
] = new HashSet[MAttribute]
328 for mprop
in self.mainmodule
.properties
(mclass
) do
329 if mprop
isa MMethod then
330 if not modelbuilder
.toolcontext
.opt_colo_dead_methods
.value
and rta
!= null and not rta
.live_methods
.has
(mprop
) then
331 dead_methods
.add
(mprop
)
334 mmethods
[mclass
].add
(mprop
)
335 else if mprop
isa MAttribute then
336 mattributes
[mclass
].add
(mprop
)
341 # Collect all super calls (dead or not)
342 var all_super_calls
= new HashSet[MMethodDef]
343 for mmodule
in self.mainmodule
.in_importation
.greaters
do
344 for mclassdef
in mmodule
.mclassdefs
do
345 for mpropdef
in mclassdef
.mpropdefs
do
346 if not mpropdef
isa MMethodDef then continue
347 if mpropdef
.has_supercall
then
348 all_super_calls
.add
(mpropdef
)
354 # lookup super calls and add it to the list of mmethods to build layout with
357 super_calls
= rta
.live_super_sends
359 super_calls
= all_super_calls
362 for mmethoddef
in super_calls
do
363 var mclass
= mmethoddef
.mclassdef
.mclass
364 mmethods
[mclass
].add
(mmethoddef
)
365 for descendant
in mclass
.in_hierarchy
(self.mainmodule
).smallers
do
366 mmethods
[descendant
].add
(mmethoddef
)
371 var meth_colorer
= new POSetBucketsColorer[MClass, PropertyLayoutElement](poset
, colorer
.conflicts
)
372 method_colors
= meth_colorer
.colorize
(mmethods
)
373 method_tables
= build_method_tables
(mclasses
, super_calls
)
374 compile_color_consts
(method_colors
)
376 # attribute null color to dead methods and supercalls
377 for mproperty
in dead_methods
do
378 compile_color_const
(new_visitor
, mproperty
, -1)
380 for mpropdef
in all_super_calls
do
381 if super_calls
.has
(mpropdef
) then continue
382 compile_color_const
(new_visitor
, mpropdef
, -1)
385 # attributes coloration
386 var attr_colorer
= new POSetBucketsColorer[MClass, MAttribute](poset
, colorer
.conflicts
)
387 attr_colors
= attr_colorer
.colorize
(mattributes
)
388 attr_tables
= build_attr_tables
(mclasses
)
389 compile_color_consts
(attr_colors
)
392 fun build_method_tables
(mclasses
: Set[MClass], super_calls
: Set[MMethodDef]): Map[MClass, Array[nullable MPropDef]] do
393 var tables
= new HashMap[MClass, Array[nullable MPropDef]]
394 for mclass
in mclasses
do
395 var table
= new Array[nullable MPropDef]
396 tables
[mclass
] = table
398 var mproperties
= self.mainmodule
.properties
(mclass
)
399 var mtype
= mclass
.intro
.bound_mtype
401 for mproperty
in mproperties
do
402 if not mproperty
isa MMethod then continue
403 if not method_colors
.has_key
(mproperty
) then continue
404 var color
= method_colors
[mproperty
]
405 if table
.length
<= color
then
406 for i
in [table
.length
.. color
[ do
410 table
[color
] = mproperty
.lookup_first_definition
(mainmodule
, mtype
)
413 for supercall
in super_calls
do
414 if not mtype
.collect_mclassdefs
(mainmodule
).has
(supercall
.mclassdef
) then continue
416 var color
= method_colors
[supercall
]
417 if table
.length
<= color
then
418 for i
in [table
.length
.. color
[ do
422 var mmethoddef
= supercall
.lookup_next_definition
(mainmodule
, mtype
)
423 table
[color
] = mmethoddef
430 fun build_attr_tables
(mclasses
: Set[MClass]): Map[MClass, Array[nullable MPropDef]] do
431 var tables
= new HashMap[MClass, Array[nullable MPropDef]]
432 for mclass
in mclasses
do
433 var table
= new Array[nullable MPropDef]
434 tables
[mclass
] = table
436 var mproperties
= self.mainmodule
.properties
(mclass
)
437 var mtype
= mclass
.intro
.bound_mtype
439 for mproperty
in mproperties
do
440 if not mproperty
isa MAttribute then continue
441 if not attr_colors
.has_key
(mproperty
) then continue
442 var color
= attr_colors
[mproperty
]
443 if table
.length
<= color
then
444 for i
in [table
.length
.. color
[ do
448 table
[color
] = mproperty
.lookup_first_definition
(mainmodule
, mtype
)
454 # colorize live types of the program
455 private fun do_type_coloring
: POSet[MType] do
456 # Collect types to colorize
457 var live_types
= runtime_type_analysis
.live_types
458 var live_cast_types
= runtime_type_analysis
.live_cast_types
461 var poset
= poset_from_mtypes
(live_types
, live_cast_types
)
462 var colorer
= new POSetColorer[MType]
463 colorer
.colorize
(poset
)
464 type_ids
= colorer
.ids
465 type_colors
= colorer
.colors
466 type_tables
= build_type_tables
(poset
)
468 # VT and FT are stored with other unresolved types in the big resolution_tables
469 self.compute_resolution_tables
(live_types
)
474 private fun poset_from_mtypes
(mtypes
, cast_types
: Set[MType]): POSet[MType] do
475 var poset
= new POSet[MType]
477 # Instead of doing the full matrix mtypes X cast_types,
478 # a grouping is done by the base classes of the type so
479 # that we compare only types whose base classes are in inheritance.
481 var mtypes_by_class
= new MultiHashMap[MClass, MType]
483 var c
= e
.as_notnullable
.as(MClassType).mclass
484 mtypes_by_class
[c
].add
(e
)
488 var casttypes_by_class
= new MultiHashMap[MClass, MType]
489 for e
in cast_types
do
490 var c
= e
.as_notnullable
.as(MClassType).mclass
491 casttypes_by_class
[c
].add
(e
)
495 for c1
, ts1
in mtypes_by_class
do
496 for c2
in c1
.in_hierarchy
(mainmodule
).greaters
do
497 var ts2
= casttypes_by_class
[c2
]
500 if e
== o
then continue
501 if e
.is_subtype
(mainmodule
, null, o
) then
512 fun build_type_tables
(mtypes
: POSet[MType]): Map[MType, Array[nullable MType]] do
513 var tables
= new HashMap[MType, Array[nullable MType]]
514 for mtype
in mtypes
do
515 var table
= new Array[nullable MType]
516 for sup
in mtypes
[mtype
].greaters
do
517 var color
= type_colors
[sup
]
518 if table
.length
<= color
then
519 for i
in [table
.length
.. color
[ do
525 tables
[mtype
] = table
530 # resolution_tables is used to perform a type resolution at runtime in O(1)
531 private fun compute_resolution_tables
(mtypes
: Set[MType]) do
532 # During the visit of the body of classes, live_unresolved_types are collected
534 # Collect all live_unresolved_types (visited in the body of classes)
536 # Determinate fo each livetype what are its possible requested anchored types
537 var mtype2unresolved
= new HashMap[MClass, Set[MType]]
538 for mtype
in self.runtime_type_analysis
.live_types
do
539 var mclass
= mtype
.mclass
540 var set
= mtype2unresolved
.get_or_null
(mclass
)
542 set
= new HashSet[MType]
543 mtype2unresolved
[mclass
] = set
545 for cd
in mtype
.collect_mclassdefs
(self.mainmodule
) do
546 if self.live_unresolved_types
.has_key
(cd
) then
547 set
.add_all
(self.live_unresolved_types
[cd
])
552 # Compute the table layout with the prefered method
553 var colorer
= new BucketsColorer[MClass, MType]
555 opentype_colors
= colorer
.colorize
(mtype2unresolved
)
556 resolution_tables
= self.build_resolution_tables
(self.runtime_type_analysis
.live_types
, mtype2unresolved
)
558 # Compile a C constant for each collected unresolved type.
559 # Either to a color, or to -1 if the unresolved type is dead (no live receiver can require it)
560 var all_unresolved
= new HashSet[MType]
561 for t
in self.live_unresolved_types
.values
do
562 all_unresolved
.add_all
(t
)
564 var all_unresolved_types_colors
= new HashMap[MType, Int]
565 for t
in all_unresolved
do
566 if opentype_colors
.has_key
(t
) then
567 all_unresolved_types_colors
[t
] = opentype_colors
[t
]
569 all_unresolved_types_colors
[t
] = -1
572 self.compile_color_consts
(all_unresolved_types_colors
)
575 #for k, v in unresolved_types_tables.as(not null) do
576 # print "{k}: {v.join(", ")}"
581 fun build_resolution_tables
(elements
: Set[MClassType], map
: Map[MClass, Set[MType]]): Map[MClassType, Array[nullable MType]] do
582 var tables
= new HashMap[MClassType, Array[nullable MType]]
583 for mclasstype
in elements
do
584 var mtypes
= map
[mclasstype
.mclass
]
585 var table
= new Array[nullable MType]
586 for mtype
in mtypes
do
587 var color
= opentype_colors
[mtype
]
588 if table
.length
<= color
then
589 for i
in [table
.length
.. color
[ do
595 tables
[mclasstype
] = table
600 # Separately compile all the method definitions of the module
601 fun compile_module_to_c
(mmodule
: MModule)
603 var old_module
= self.mainmodule
604 self.mainmodule
= mmodule
605 for cd
in mmodule
.mclassdefs
do
606 for pd
in cd
.mpropdefs
do
607 if not pd
isa MMethodDef then continue
608 var rta
= runtime_type_analysis
609 if modelbuilder
.toolcontext
.opt_skip_dead_methods
.value
and rta
!= null and not rta
.live_methoddefs
.has
(pd
) then continue
610 #print "compile {pd} @ {cd} @ {mmodule}"
611 var r
= pd
.separate_runtime_function
613 var r2
= pd
.virtual_runtime_function
614 if r2
!= r
then r2
.compile_to_c
(self)
616 # Generate trampolines
617 if modelbuilder
.toolcontext
.opt_trampoline_call
.value
then
618 r2
.compile_trampolines
(self)
622 self.mainmodule
= old_module
625 # Process all introduced methods and compile some linking information (if needed)
628 if not modelbuilder
.toolcontext
.opt_substitute_monomorph
.value
and not modelbuilder
.toolcontext
.opt_guard_call
.value
then return
630 for mmodule
in mainmodule
.in_importation
.greaters
do
631 for cd
in mmodule
.mclassdefs
do
632 for m
in cd
.intro_mproperties
do
633 if not m
isa MMethod then continue
640 # Compile some linking information (if needed)
641 fun link_mmethod
(m
: MMethod)
643 var n2
= "CALL_" + m
.const_color
645 # Replace monomorphic call by a direct call to the virtual implementation
646 var md
= is_monomorphic
(m
)
648 linker_script
.add
("{n2} = {md.virtual_runtime_function.c_name};")
651 # If opt_substitute_monomorph then a trampoline is used, else a weak symbol is used
652 if modelbuilder
.toolcontext
.opt_guard_call
.value
then
653 var r
= m
.intro
.virtual_runtime_function
654 provide_declaration
(n2
, "{r.c_ret} {n2}{r.c_sig} __attribute__((weak));")
658 # The single mmethodef called in case of monomorphism.
659 # Returns nul if dead or polymorphic.
660 fun is_monomorphic
(m
: MMethod): nullable MMethodDef
662 var rta
= runtime_type_analysis
664 # Without RTA, monomorphic means alone (uniq name)
665 if m
.mpropdefs
.length
== 1 then
666 return m
.mpropdefs
.first
671 # With RTA, monomorphic means only live methoddef
672 var res
: nullable MMethodDef = null
673 for md
in m
.mpropdefs
do
674 if rta
.live_methoddefs
.has
(md
) then
675 if res
!= null then return null
683 # Globaly compile the type structure of a live type
684 fun compile_type_to_c
(mtype
: MType)
686 assert not mtype
.need_anchor
687 var is_live
= mtype
isa MClassType and runtime_type_analysis
.live_types
.has
(mtype
)
688 var is_cast_live
= runtime_type_analysis
.live_cast_types
.has
(mtype
)
689 var c_name
= mtype
.c_name
690 var v
= new SeparateCompilerVisitor(self)
691 v
.add_decl
("/* runtime type {mtype} */")
693 # extern const struct type_X
694 self.provide_declaration
("type_{c_name}", "extern const struct type type_{c_name};")
696 # const struct type_X
697 v
.add_decl
("const struct type type_{c_name} = \{")
699 # type id (for cast target)
701 v
.add_decl
("{type_ids[mtype]},")
703 v
.add_decl
("-1, /*CAST DEAD*/")
707 v
.add_decl
("\"{mtype}\
", /* class_name_string */")
709 # type color (for cast target)
711 v
.add_decl
("{type_colors[mtype]},")
713 v
.add_decl
("-1, /*CAST DEAD*/")
717 if mtype
isa MNullableType then
723 # resolution table (for receiver)
725 var mclass_type
= mtype
.as_notnullable
726 assert mclass_type
isa MClassType
727 if resolution_tables
[mclass_type
].is_empty
then
728 v
.add_decl
("NULL, /*NO RESOLUTIONS*/")
730 compile_type_resolution_table
(mtype
)
731 v
.require_declaration
("resolution_table_{c_name}")
732 v
.add_decl
("&resolution_table_{c_name},")
735 v
.add_decl
("NULL, /*DEAD*/")
738 # cast table (for receiver)
740 v
.add_decl
("{self.type_tables[mtype].length},")
742 for stype
in self.type_tables
[mtype
] do
743 if stype
== null then
744 v
.add_decl
("-1, /* empty */")
746 v
.add_decl
("{type_ids[stype]}, /* {stype} */")
751 v
.add_decl
("0, \{\}, /*DEAD TYPE*/")
756 fun compile_type_resolution_table
(mtype
: MType) do
758 var mclass_type
= mtype
.as_notnullable
.as(MClassType)
760 # extern const struct resolution_table_X resolution_table_X
761 self.provide_declaration
("resolution_table_{mtype.c_name}", "extern const struct types resolution_table_{mtype.c_name};")
763 # const struct fts_table_X fts_table_X
765 v
.add_decl
("const struct types resolution_table_{mtype.c_name} = \{")
766 v
.add_decl
("0, /* dummy */")
768 for t
in self.resolution_tables
[mclass_type
] do
770 v
.add_decl
("NULL, /* empty */")
772 # The table stores the result of the type resolution
773 # Therefore, for a receiver `mclass_type`, and a unresolved type `t`
774 # the value stored is tv.
775 var tv
= t
.resolve_for
(mclass_type
, mclass_type
, self.mainmodule
, true)
776 # FIXME: What typeids means here? How can a tv not be live?
777 if type_ids
.has_key
(tv
) then
778 v
.require_declaration
("type_{tv.c_name}")
779 v
.add_decl
("&type_{tv.c_name}, /* {t}: {tv} */")
781 v
.add_decl
("NULL, /* empty ({t}: {tv} not a live type) */")
789 # Globally compile the table of the class mclass
790 # In a link-time optimisation compiler, tables are globally computed
791 # In a true separate compiler (a with dynamic loading) you cannot do this unfortnally
792 fun compile_class_to_c
(mclass
: MClass)
794 var mtype
= mclass
.intro
.bound_mtype
795 var c_name
= mclass
.c_name
799 var rta
= runtime_type_analysis
800 var is_dead
= rta
!= null and not rta
.live_classes
.has
(mclass
) and mtype
.ctype
== "val*" and mclass
.name
!= "NativeArray" and mclass
.name
!= "Pointer"
802 v
.add_decl
("/* runtime class {c_name} */")
806 self.provide_declaration
("class_{c_name}", "extern const struct class class_{c_name};")
807 v
.add_decl
("const struct class class_{c_name} = \{")
808 v
.add_decl
("{self.box_kind_of(mclass)}, /* box_kind */")
810 var vft
= self.method_tables
.get_or_null
(mclass
)
811 if vft
!= null then for i
in [0 .. vft
.length
[ do
812 var mpropdef
= vft
[i
]
813 if mpropdef
== null then
814 v
.add_decl
("NULL, /* empty */")
816 assert mpropdef
isa MMethodDef
817 if rta
!= null and not rta
.live_methoddefs
.has
(mpropdef
) then
818 v
.add_decl
("NULL, /* DEAD {mclass.intro_mmodule}:{mclass}:{mpropdef} */")
821 var rf
= mpropdef
.virtual_runtime_function
822 v
.require_declaration
(rf
.c_name
)
823 v
.add_decl
("(nitmethod_t){rf.c_name}, /* pointer to {mclass.intro_mmodule}:{mclass}:{mpropdef} */")
830 if mtype
.ctype
!= "val*" or mtype
.mclass
.name
== "Pointer" then
831 # Is a primitive type or the Pointer class, not any other extern class
833 if mtype
.is_tagged
then return
835 #Build instance struct
836 self.header
.add_decl
("struct instance_{c_name} \{")
837 self.header
.add_decl
("const struct type *type;")
838 self.header
.add_decl
("const struct class *class;")
839 self.header
.add_decl
("{mtype.ctype_extern} value;")
840 self.header
.add_decl
("\};")
842 if not rta
.live_types
.has
(mtype
) and mtype
.mclass
.name
!= "Pointer" then return
845 self.provide_declaration
("BOX_{c_name}", "val* BOX_{c_name}({mtype.ctype_extern});")
846 v
.add_decl
("/* allocate {mtype} */")
847 v
.add_decl
("val* BOX_{mtype.c_name}({mtype.ctype_extern} value) \{")
848 v
.add
("struct instance_{c_name}*res = nit_alloc(sizeof(struct instance_{c_name}));")
849 v
.compiler
.undead_types
.add
(mtype
)
850 v
.require_declaration
("type_{c_name}")
851 v
.add
("res->type = &type_{c_name};")
852 v
.require_declaration
("class_{c_name}")
853 v
.add
("res->class = &class_{c_name};")
854 v
.add
("res->value = value;")
855 v
.add
("return (val*)res;")
858 if mtype
.mclass
.name
!= "Pointer" then return
861 self.provide_declaration
("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}(const struct type* type);")
862 v
.add_decl
("/* allocate {mtype} */")
863 v
.add_decl
("{mtype.ctype} NEW_{c_name}(const struct type* type) \{")
865 v
.add_abort
("{mclass} is DEAD")
867 var res
= v
.new_named_var
(mtype
, "self")
869 v
.add
("{res} = nit_alloc(sizeof(struct instance_{mtype.c_name}));")
870 v
.add
("{res}->type = type;")
871 hardening_live_type
(v
, "type")
872 v
.require_declaration
("class_{c_name}")
873 v
.add
("{res}->class = &class_{c_name};")
874 v
.add
("((struct instance_{mtype.c_name}*){res})->value = NULL;")
875 v
.add
("return {res};")
879 else if mclass
.name
== "NativeArray" then
880 #Build instance struct
881 self.header
.add_decl
("struct instance_{c_name} \{")
882 self.header
.add_decl
("const struct type *type;")
883 self.header
.add_decl
("const struct class *class;")
884 # NativeArrays are just a instance header followed by a length and an array of values
885 self.header
.add_decl
("int length;")
886 self.header
.add_decl
("val* values[0];")
887 self.header
.add_decl
("\};")
890 self.provide_declaration
("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}(int length, const struct type* type);")
891 v
.add_decl
("/* allocate {mtype} */")
892 v
.add_decl
("{mtype.ctype} NEW_{c_name}(int length, const struct type* type) \{")
893 var res
= v
.get_name
("self")
894 v
.add_decl
("struct instance_{c_name} *{res};")
895 var mtype_elt
= mtype
.arguments
.first
896 v
.add
("{res} = nit_alloc(sizeof(struct instance_{c_name}) + length*sizeof({mtype_elt.ctype}));")
897 v
.add
("{res}->type = type;")
898 hardening_live_type
(v
, "type")
899 v
.require_declaration
("class_{c_name}")
900 v
.add
("{res}->class = &class_{c_name};")
901 v
.add
("{res}->length = length;")
902 v
.add
("return (val*){res};")
905 else if mtype
.mclass
.kind
== extern_kind
and mtype
.mclass
.name
!= "NativeString" then
906 # Is an extern class (other than Pointer and NativeString)
907 # Pointer is caught in a previous `if`, and NativeString is internal
909 var pointer_type
= mainmodule
.pointer_type
911 self.provide_declaration
("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}(const struct type* type);")
912 v
.add_decl
("/* allocate {mtype} */")
913 v
.add_decl
("{mtype.ctype} NEW_{c_name}(const struct type* type) \{")
915 v
.add_abort
("{mclass} is DEAD")
917 var res
= v
.new_named_var
(mtype
, "self")
919 v
.add
("{res} = nit_alloc(sizeof(struct instance_{pointer_type.c_name}));")
920 v
.add
("{res}->type = type;")
921 hardening_live_type
(v
, "type")
922 v
.require_declaration
("class_{c_name}")
923 v
.add
("{res}->class = &class_{c_name};")
924 v
.add
("((struct instance_{pointer_type.c_name}*){res})->value = NULL;")
925 v
.add
("return {res};")
932 self.provide_declaration
("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}(const struct type* type);")
933 v
.add_decl
("/* allocate {mtype} */")
934 v
.add_decl
("{mtype.ctype} NEW_{c_name}(const struct type* type) \{")
936 v
.add_abort
("{mclass} is DEAD")
938 var res
= v
.new_named_var
(mtype
, "self")
940 var attrs
= self.attr_tables
.get_or_null
(mclass
)
941 if attrs
== null then
942 v
.add
("{res} = nit_alloc(sizeof(struct instance));")
944 v
.add
("{res} = nit_alloc(sizeof(struct instance) + {attrs.length}*sizeof(nitattribute_t));")
946 v
.add
("{res}->type = type;")
947 hardening_live_type
(v
, "type")
948 v
.require_declaration
("class_{c_name}")
949 v
.add
("{res}->class = &class_{c_name};")
950 if attrs
!= null then
951 self.generate_init_attr
(v
, res
, mtype
)
954 v
.add
("return {res};")
959 # Compile structures used to map tagged primitive values to their classes and types.
960 # This method also determines which class will be tagged.
961 fun compile_class_infos
963 if modelbuilder
.toolcontext
.opt_no_tag_primitives
.value
then return
965 # Note: if you change the tagging scheme, do not forget to update
966 # `autobox` and `extract_tag`
967 var class_info
= new Array[nullable MClass].filled_with
(null, 4)
968 for t
in box_kinds
.keys
do
969 # Note: a same class can be associated to multiple slots if one want to
970 # use some Huffman coding.
971 if t
.name
== "Int" then
973 else if t
.name
== "Char" then
975 else if t
.name
== "Bool" then
980 t
.mclass_type
.is_tagged
= true
983 # Compile the table for classes. The tag is used as an index
984 var v
= self.new_visitor
985 v
.add_decl
"const struct class *class_info[4] = \{"
986 for t
in class_info
do
990 var s
= "class_{t.c_name}"
991 v
.require_declaration
(s
)
997 # Compile the table for types. The tag is used as an index
998 v
.add_decl
"const struct type *type_info[4] = \{"
999 for t
in class_info
do
1003 var s
= "type_{t.c_name}"
1004 undead_types
.add
(t
.mclass_type
)
1005 v
.require_declaration
(s
)
1012 # Add a dynamic test to ensure that the type referenced by `t` is a live type
1013 fun hardening_live_type
(v
: VISITOR, t
: String)
1015 if not v
.compiler
.modelbuilder
.toolcontext
.opt_hardening
.value
then return
1016 v
.add
("if({t} == NULL) \{")
1017 v
.add_abort
("type null")
1019 v
.add
("if({t}->table_size == 0) \{")
1020 v
.add
("PRINT_ERROR(\"Insantiation of a dead
type: %s\\n\
", {t}->name);")
1021 v
.add_abort
("type dead")
1025 redef fun new_visitor
do return new SeparateCompilerVisitor(self)
1029 private var type_tables
: Map[MType, Array[nullable MType]] = new HashMap[MType, Array[nullable MType]]
1030 private var resolution_tables
: Map[MClassType, Array[nullable MType]] = new HashMap[MClassType, Array[nullable MType]]
1031 protected var method_tables
: Map[MClass, Array[nullable MPropDef]] = new HashMap[MClass, Array[nullable MPropDef]]
1032 protected var attr_tables
: Map[MClass, Array[nullable MPropDef]] = new HashMap[MClass, Array[nullable MPropDef]]
1034 redef fun display_stats
1037 if self.modelbuilder
.toolcontext
.opt_tables_metrics
.value
then
1040 if self.modelbuilder
.toolcontext
.opt_isset_checks_metrics
.value
then
1041 display_isset_checks
1043 var tc
= self.modelbuilder
.toolcontext
1044 tc
.info
("# implementation of method invocation",2)
1045 var nb_invok_total
= modelbuilder
.nb_invok_by_tables
+ modelbuilder
.nb_invok_by_direct
+ modelbuilder
.nb_invok_by_inline
1046 tc
.info
("total number of invocations: {nb_invok_total}",2)
1047 tc
.info
("invocations by VFT send: {modelbuilder.nb_invok_by_tables} ({div(modelbuilder.nb_invok_by_tables,nb_invok_total)}%)",2)
1048 tc
.info
("invocations by direct call: {modelbuilder.nb_invok_by_direct} ({div(modelbuilder.nb_invok_by_direct,nb_invok_total)}%)",2)
1049 tc
.info
("invocations by inlining: {modelbuilder.nb_invok_by_inline} ({div(modelbuilder.nb_invok_by_inline,nb_invok_total)}%)",2)
1054 print
"# size of subtyping tables"
1055 print
"\ttotal \tholes"
1058 for t
, table
in type_tables
do
1059 total
+= table
.length
1060 for e
in table
do if e
== null then holes
+= 1
1062 print
"\t{total}\t{holes}"
1064 print
"# size of resolution tables"
1065 print
"\ttotal \tholes"
1068 for t
, table
in resolution_tables
do
1069 total
+= table
.length
1070 for e
in table
do if e
== null then holes
+= 1
1072 print
"\t{total}\t{holes}"
1074 print
"# size of methods tables"
1075 print
"\ttotal \tholes"
1078 for t
, table
in method_tables
do
1079 total
+= table
.length
1080 for e
in table
do if e
== null then holes
+= 1
1082 print
"\t{total}\t{holes}"
1084 print
"# size of attributes tables"
1085 print
"\ttotal \tholes"
1088 for t
, table
in attr_tables
do
1089 total
+= table
.length
1090 for e
in table
do if e
== null then holes
+= 1
1092 print
"\t{total}\t{holes}"
1095 protected var isset_checks_count
= 0
1096 protected var attr_read_count
= 0
1098 fun display_isset_checks
do
1099 print
"# total number of compiled attribute reads"
1100 print
"\t{attr_read_count}"
1101 print
"# total number of compiled isset-checks"
1102 print
"\t{isset_checks_count}"
1105 redef fun compile_nitni_structs
1107 self.header
.add_decl
"""
1108 struct nitni_instance \{
1109 struct nitni_instance *next,
1110 *prev; /* adjacent global references in global list */
1111 int count; /* number of time this global reference has been marked */
1112 struct instance *value;
1118 redef fun finalize_ffi_for_module
(mmodule
)
1120 var old_module
= self.mainmodule
1121 self.mainmodule
= mmodule
1123 self.mainmodule
= old_module
1127 # A visitor on the AST of property definition that generate the C code of a separate compilation process.
1128 class SeparateCompilerVisitor
1129 super AbstractCompilerVisitor
1131 redef type COMPILER: SeparateCompiler
1133 redef fun adapt_signature
(m
, args
)
1135 var msignature
= m
.msignature
.resolve_for
(m
.mclassdef
.bound_mtype
, m
.mclassdef
.bound_mtype
, m
.mclassdef
.mmodule
, true)
1136 var recv
= args
.first
1137 if recv
.mtype
.ctype
!= m
.mclassdef
.mclass
.mclass_type
.ctype
then
1138 args
.first
= self.autobox
(args
.first
, m
.mclassdef
.mclass
.mclass_type
)
1140 for i
in [0..msignature
.arity
[ do
1141 var t
= msignature
.mparameters
[i
].mtype
1142 if i
== msignature
.vararg_rank
then
1145 args
[i
+1] = self.autobox
(args
[i
+1], t
)
1149 redef fun unbox_signature_extern
(m
, args
)
1151 var msignature
= m
.msignature
.resolve_for
(m
.mclassdef
.bound_mtype
, m
.mclassdef
.bound_mtype
, m
.mclassdef
.mmodule
, true)
1152 if not m
.mproperty
.is_init
and m
.is_extern
then
1153 args
.first
= self.unbox_extern
(args
.first
, m
.mclassdef
.mclass
.mclass_type
)
1155 for i
in [0..msignature
.arity
[ do
1156 var t
= msignature
.mparameters
[i
].mtype
1157 if i
== msignature
.vararg_rank
then
1160 if m
.is_extern
then args
[i
+1] = self.unbox_extern
(args
[i
+1], t
)
1164 redef fun autobox
(value
, mtype
)
1166 if value
.mtype
== mtype
then
1168 else if value
.mtype
.ctype
== "val*" and mtype
.ctype
== "val*" then
1170 else if value
.mtype
.ctype
== "val*" then
1171 if mtype
.is_tagged
then
1172 if mtype
.name
== "Int" then
1173 return self.new_expr
("(long)({value})>>2", mtype
)
1174 else if mtype
.name
== "Char" then
1175 return self.new_expr
("(char)((long)({value})>>2)", mtype
)
1176 else if mtype
.name
== "Bool" then
1177 return self.new_expr
("(short int)((long)({value})>>2)", mtype
)
1182 return self.new_expr
("((struct instance_{mtype.c_name}*){value})->value; /* autounbox from {value.mtype} to {mtype} */", mtype
)
1183 else if mtype
.ctype
== "val*" then
1184 if value
.mtype
.is_tagged
then
1185 if value
.mtype
.name
== "Int" then
1186 return self.new_expr
("(val*)({value}<<2|1)", mtype
)
1187 else if value
.mtype
.name
== "Char" then
1188 return self.new_expr
("(val*)((long)({value})<<2|2)", mtype
)
1189 else if value
.mtype
.name
== "Bool" then
1190 return self.new_expr
("(val*)((long)({value})<<2|3)", mtype
)
1195 var valtype
= value
.mtype
.as(MClassType)
1196 if mtype
isa MClassType and mtype
.mclass
.kind
== extern_kind
and mtype
.mclass
.name
!= "NativeString" then
1197 valtype
= compiler
.mainmodule
.pointer_type
1199 var res
= self.new_var
(mtype
)
1200 if compiler
.runtime_type_analysis
!= null and not compiler
.runtime_type_analysis
.live_types
.has
(valtype
) then
1201 self.add
("/*no autobox from {value.mtype} to {mtype}: {value.mtype} is not live! */")
1202 self.add
("PRINT_ERROR(\"Dead code executed
!\\n\
"); fatal_exit(1);")
1205 self.require_declaration
("BOX_{valtype.c_name}")
1206 self.add
("{res} = BOX_{valtype.c_name}({value}); /* autobox from {value.mtype} to {mtype} */")
1208 else if (value
.mtype
.ctype
== "void*" and mtype
.ctype
== "void*") or
1209 (value
.mtype
.ctype
== "char*" and mtype
.ctype
== "void*") or
1210 (value
.mtype
.ctype
== "void*" and mtype
.ctype
== "char*") then
1213 # Bad things will appen!
1214 var res
= self.new_var
(mtype
)
1215 self.add
("/* {res} left unintialized (cannot convert {value.mtype} to {mtype}) */")
1216 self.add
("PRINT_ERROR(\"Cast error
: Cannot cast
%s to
%s
.\\n\
", \"{value.mtype}\
", \"{mtype}\
"); fatal_exit(1);")
1221 redef fun unbox_extern
(value
, mtype
)
1223 if mtype
isa MClassType and mtype
.mclass
.kind
== extern_kind
and
1224 mtype
.mclass
.name
!= "NativeString" then
1225 var pointer_type
= compiler
.mainmodule
.pointer_type
1226 var res
= self.new_var_extern
(mtype
)
1227 self.add
"{res} = ((struct instance_{pointer_type.c_name}*){value})->value; /* unboxing {value.mtype} */"
1234 redef fun box_extern
(value
, mtype
)
1236 if mtype
isa MClassType and mtype
.mclass
.kind
== extern_kind
and
1237 mtype
.mclass
.name
!= "NativeString" then
1238 var valtype
= compiler
.mainmodule
.pointer_type
1239 var res
= self.new_var
(mtype
)
1240 if compiler
.runtime_type_analysis
!= null and not compiler
.runtime_type_analysis
.live_types
.has
(value
.mtype
.as(MClassType)) then
1241 self.add
("/*no boxing of {value.mtype}: {value.mtype} is not live! */")
1242 self.add
("PRINT_ERROR(\"Dead code executed
!\\n\
"); fatal_exit(1);")
1245 self.require_declaration
("BOX_{valtype.c_name}")
1246 self.add
("{res} = BOX_{valtype.c_name}({value}); /* boxing {value.mtype} */")
1247 self.require_declaration
("type_{mtype.c_name}")
1248 self.add
("{res}->type = &type_{mtype.c_name};")
1249 self.require_declaration
("class_{mtype.c_name}")
1250 self.add
("{res}->class = &class_{mtype.c_name};")
1257 # Returns a C expression containing the tag of the value as a long.
1259 # If the C expression is evaluated to 0, it means there is no tag.
1260 # Thus the expression can be used as a condition.
1261 fun extract_tag
(value
: RuntimeVariable): String
1263 assert value
.mtype
.ctype
== "val*"
1264 return "((long){value}&3)" # Get the two low bits
1267 # Returns a C expression of the runtime class structure of the value.
1268 # The point of the method is to work also with primitive types.
1269 fun class_info
(value
: RuntimeVariable): String
1271 if value
.mtype
.ctype
== "val*" then
1272 if can_be_primitive
(value
) and not compiler
.modelbuilder
.toolcontext
.opt_no_tag_primitives
.value
then
1273 var tag
= extract_tag
(value
)
1274 return "({tag}?class_info[{tag}]:{value}->class)"
1276 return "{value}->class"
1278 compiler
.undead_types
.add
(value
.mtype
)
1279 self.require_declaration
("class_{value.mtype.c_name}")
1280 return "(&class_{value.mtype.c_name})"
1284 # Returns a C expression of the runtime type structure of the value.
1285 # The point of the method is to work also with primitive types.
1286 fun type_info
(value
: RuntimeVariable): String
1288 if value
.mtype
.ctype
== "val*" then
1289 if can_be_primitive
(value
) and not compiler
.modelbuilder
.toolcontext
.opt_no_tag_primitives
.value
then
1290 var tag
= extract_tag
(value
)
1291 return "({tag}?type_info[{tag}]:{value}->type)"
1293 return "{value}->type"
1295 compiler
.undead_types
.add
(value
.mtype
)
1296 self.require_declaration
("type_{value.mtype.c_name}")
1297 return "(&type_{value.mtype.c_name})"
1301 redef fun compile_callsite
(callsite
, args
)
1303 var rta
= compiler
.runtime_type_analysis
1304 # TODO: Inlining of new-style constructors with initializers
1305 if compiler
.modelbuilder
.toolcontext
.opt_direct_call_monomorph
.value
and rta
!= null and callsite
.mpropdef
.initializers
.is_empty
then
1306 var tgs
= rta
.live_targets
(callsite
)
1307 if tgs
.length
== 1 then
1308 return direct_call
(tgs
.first
, args
)
1311 # Shortcut intern methods as they are not usually redefinable
1312 if callsite
.mpropdef
.is_intern
and callsite
.mproperty
.name
!= "object_id" then
1313 # `object_id` is the only redefined intern method, so it can not be directly called.
1314 # TODO find a less ugly approach?
1315 return direct_call
(callsite
.mpropdef
, args
)
1320 # Fully and directly call a mpropdef
1322 # This method is used by `compile_callsite`
1323 private fun direct_call
(mpropdef
: MMethodDef, args
: Array[RuntimeVariable]): nullable RuntimeVariable
1325 var res0
= before_send
(mpropdef
.mproperty
, args
)
1326 var res
= call
(mpropdef
, mpropdef
.mclassdef
.bound_mtype
, args
)
1327 if res0
!= null then
1329 self.assign
(res0
, res
)
1332 add
("\}") # close the before_send
1335 redef fun send
(mmethod
, arguments
)
1337 if arguments
.first
.mcasttype
.ctype
!= "val*" then
1338 # In order to shortcut the primitive, we need to find the most specific method
1339 # Howverr, because of performance (no flattening), we always work on the realmainmodule
1340 var m
= self.compiler
.mainmodule
1341 self.compiler
.mainmodule
= self.compiler
.realmainmodule
1342 var res
= self.monomorphic_send
(mmethod
, arguments
.first
.mcasttype
, arguments
)
1343 self.compiler
.mainmodule
= m
1347 return table_send
(mmethod
, arguments
, mmethod
)
1350 # Handle common special cases before doing the effective method invocation
1351 # This methods handle the `==` and `!=` methods and the case of the null receiver.
1352 # Note: a { is open in the generated C, that enclose and protect the effective method invocation.
1353 # Client must not forget to close the } after them.
1355 # The value returned is the result of the common special cases.
1356 # If not null, client must compile it with the result of their own effective method invocation.
1358 # If `before_send` can shortcut the whole message sending, a dummy `if(0){`
1359 # is generated to cancel the effective method invocation that will follow
1360 # TODO: find a better approach
1361 private fun before_send
(mmethod
: MMethod, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable
1363 var res
: nullable RuntimeVariable = null
1364 var recv
= arguments
.first
1365 var consider_null
= not self.compiler
.modelbuilder
.toolcontext
.opt_no_check_null
.value
or mmethod
.name
== "==" or mmethod
.name
== "!="
1366 var maybenull
= (recv
.mcasttype
isa MNullableType or recv
.mcasttype
isa MNullType) and consider_null
1368 self.add
("if ({recv} == NULL) \{")
1369 if mmethod
.name
== "==" or mmethod
.name
== "is_same_instance" then
1370 res
= self.new_var
(bool_type
)
1371 var arg
= arguments
[1]
1372 if arg
.mcasttype
isa MNullableType then
1373 self.add
("{res} = ({arg} == NULL);")
1374 else if arg
.mcasttype
isa MNullType then
1375 self.add
("{res} = 1; /* is null */")
1377 self.add
("{res} = 0; /* {arg.inspect} cannot be null */")
1379 else if mmethod
.name
== "!=" then
1380 res
= self.new_var
(bool_type
)
1381 var arg
= arguments
[1]
1382 if arg
.mcasttype
isa MNullableType then
1383 self.add
("{res} = ({arg} != NULL);")
1384 else if arg
.mcasttype
isa MNullType then
1385 self.add
("{res} = 0; /* is null */")
1387 self.add
("{res} = 1; /* {arg.inspect} cannot be null */")
1390 self.add_abort
("Receiver is null")
1392 self.add
("\} else \{")
1396 if not self.compiler
.modelbuilder
.toolcontext
.opt_no_shortcut_equate
.value
and (mmethod
.name
== "==" or mmethod
.name
== "!=" or mmethod
.name
== "is_same_instance") then
1397 # Recv is not null, thus if arg is, it is easy to conclude (and respect the invariants)
1398 var arg
= arguments
[1]
1399 if arg
.mcasttype
isa MNullType then
1400 if res
== null then res
= self.new_var
(bool_type
)
1401 if mmethod
.name
== "!=" then
1402 self.add
("{res} = 1; /* arg is null and recv is not */")
1403 else # `==` and `is_same_instance`
1404 self.add
("{res} = 0; /* arg is null but recv is not */")
1406 self.add
("\}") # closes the null case
1407 self.add
("if (0) \{") # what follow is useless, CC will drop it
1413 private fun table_send
(mmethod
: MMethod, arguments
: Array[RuntimeVariable], mentity
: MEntity): nullable RuntimeVariable
1415 compiler
.modelbuilder
.nb_invok_by_tables
+= 1
1416 if compiler
.modelbuilder
.toolcontext
.opt_invocation_metrics
.value
then add
("count_invoke_by_tables++;")
1418 assert arguments
.length
== mmethod
.intro
.msignature
.arity
+ 1 else debug
("Invalid arity for {mmethod}. {arguments.length} arguments given.")
1419 var recv
= arguments
.first
1421 var res0
= before_send
(mmethod
, arguments
)
1423 var runtime_function
= mmethod
.intro
.virtual_runtime_function
1424 var msignature
= runtime_function
.called_signature
1426 var res
: nullable RuntimeVariable
1427 var ret
= msignature
.return_mtype
1431 res
= self.new_var
(ret
)
1434 var ss
= new FlatBuffer
1437 for i
in [0..msignature
.arity
[ do
1438 var a
= arguments
[i
+1]
1439 var t
= msignature
.mparameters
[i
].mtype
1440 if i
== msignature
.vararg_rank
then
1441 t
= arguments
[i
+1].mcasttype
1443 a
= self.autobox
(a
, t
)
1447 var const_color
= mentity
.const_color
1454 if mentity
isa MMethod and compiler
.modelbuilder
.toolcontext
.opt_direct_call_monomorph0
.value
then
1455 # opt_direct_call_monomorph0 is used to compare the efficiency of the alternative lookup implementation, ceteris paribus.
1456 # The difference with the non-zero option is that the monomorphism is looked-at on the mmethod level and not at the callsite level.
1457 # TODO: remove this mess and use per callsite service to detect monomorphism in a single place.
1458 var md
= compiler
.is_monomorphic
(mentity
)
1460 var callsym
= md
.virtual_runtime_function
.c_name
1461 self.require_declaration
(callsym
)
1462 self.add
"{ress}{callsym}({ss}); /* {mmethod} on {arguments.first.inspect}*/"
1464 self.require_declaration
(const_color
)
1465 self.add
"{ress}(({runtime_function.c_funptrtype})({class_info(arguments.first)}->vft[{const_color}]))({ss}); /* {mmethod} on {arguments.first.inspect}*/"
1467 else if mentity
isa MMethod and compiler
.modelbuilder
.toolcontext
.opt_guard_call
.value
then
1468 var callsym
= "CALL_" + const_color
1469 self.require_declaration
(callsym
)
1470 self.add
"if (!{callsym}) \{"
1471 self.require_declaration
(const_color
)
1472 self.add
"{ress}(({runtime_function.c_funptrtype})({class_info(arguments.first)}->vft[{const_color}]))({ss}); /* {mmethod} on {arguments.first.inspect}*/"
1473 self.add
"\} else \{"
1474 self.add
"{ress}{callsym}({ss}); /* {mmethod} on {arguments.first.inspect}*/"
1476 else if mentity
isa MMethod and compiler
.modelbuilder
.toolcontext
.opt_trampoline_call
.value
then
1477 var callsym
= "CALL_" + const_color
1478 self.require_declaration
(callsym
)
1479 self.add
"{ress}{callsym}({ss}); /* {mmethod} on {arguments.first.inspect}*/"
1481 self.require_declaration
(const_color
)
1482 self.add
"{ress}(({runtime_function.c_funptrtype})({class_info(arguments.first)}->vft[{const_color}]))({ss}); /* {mmethod} on {arguments.first.inspect}*/"
1485 if res0
!= null then
1491 self.add
("\}") # closes the null case
1496 redef fun call
(mmethoddef
, recvtype
, arguments
)
1498 assert arguments
.length
== mmethoddef
.msignature
.arity
+ 1 else debug
("Invalid arity for {mmethoddef}. {arguments.length} arguments given.")
1500 var res
: nullable RuntimeVariable
1501 var ret
= mmethoddef
.msignature
.return_mtype
1505 ret
= ret
.resolve_for
(mmethoddef
.mclassdef
.bound_mtype
, mmethoddef
.mclassdef
.bound_mtype
, mmethoddef
.mclassdef
.mmodule
, true)
1506 res
= self.new_var
(ret
)
1509 if (mmethoddef
.is_intern
and not compiler
.modelbuilder
.toolcontext
.opt_no_inline_intern
.value
) or
1510 (compiler
.modelbuilder
.toolcontext
.opt_inline_some_methods
.value
and mmethoddef
.can_inline
(self)) then
1511 compiler
.modelbuilder
.nb_invok_by_inline
+= 1
1512 if compiler
.modelbuilder
.toolcontext
.opt_invocation_metrics
.value
then add
("count_invoke_by_inline++;")
1513 var frame
= new StaticFrame(self, mmethoddef
, recvtype
, arguments
)
1514 frame
.returnlabel
= self.get_name
("RET_LABEL")
1515 frame
.returnvar
= res
1516 var old_frame
= self.frame
1518 self.add
("\{ /* Inline {mmethoddef} ({arguments.join(",")}) on {arguments.first.inspect} */")
1519 mmethoddef
.compile_inside_to_c
(self, arguments
)
1520 self.add
("{frame.returnlabel.as(not null)}:(void)0;")
1522 self.frame
= old_frame
1525 compiler
.modelbuilder
.nb_invok_by_direct
+= 1
1526 if compiler
.modelbuilder
.toolcontext
.opt_invocation_metrics
.value
then add
("count_invoke_by_direct++;")
1529 self.adapt_signature
(mmethoddef
, arguments
)
1531 self.require_declaration
(mmethoddef
.c_name
)
1533 self.add
("{mmethoddef.c_name}({arguments.join(", ")}); /* Direct call {mmethoddef} on {arguments.first.inspect}*/")
1536 self.add
("{res} = {mmethoddef.c_name}({arguments.join(", ")});")
1542 redef fun supercall
(m
: MMethodDef, recvtype
: MClassType, arguments
: Array[RuntimeVariable]): nullable RuntimeVariable
1544 if arguments
.first
.mcasttype
.ctype
!= "val*" then
1545 # In order to shortcut the primitive, we need to find the most specific method
1546 # However, because of performance (no flattening), we always work on the realmainmodule
1547 var main
= self.compiler
.mainmodule
1548 self.compiler
.mainmodule
= self.compiler
.realmainmodule
1549 var res
= self.monomorphic_super_send
(m
, recvtype
, arguments
)
1550 self.compiler
.mainmodule
= main
1553 return table_send
(m
.mproperty
, arguments
, m
)
1556 redef fun vararg_instance
(mpropdef
, recv
, varargs
, elttype
)
1558 # A vararg must be stored into an new array
1559 # The trick is that the dymaic type of the array may depends on the receiver
1560 # of the method (ie recv) if the static type is unresolved
1561 # This is more complex than usual because the unresolved type must not be resolved
1562 # with the current receiver (ie self).
1563 # Therefore to isolate the resolution from self, a local StaticFrame is created.
1564 # One can see this implementation as an inlined method of the receiver whose only
1565 # job is to allocate the array
1566 var old_frame
= self.frame
1567 var frame
= new StaticFrame(self, mpropdef
, mpropdef
.mclassdef
.bound_mtype
, [recv
])
1569 #print "required Array[{elttype}] for recv {recv.inspect}. bound=Array[{self.resolve_for(elttype, recv)}]. selfvar={frame.arguments.first.inspect}"
1570 var res
= self.array_instance
(varargs
, elttype
)
1571 self.frame
= old_frame
1575 redef fun isset_attribute
(a
, recv
)
1577 self.check_recv_notnull
(recv
)
1578 var res
= self.new_var
(bool_type
)
1580 # What is the declared type of the attribute?
1581 var mtype
= a
.intro
.static_mtype
.as(not null)
1582 var intromclassdef
= a
.intro
.mclassdef
1583 mtype
= mtype
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
1585 if mtype
isa MNullableType then
1586 self.add
("{res} = 1; /* easy isset: {a} on {recv.inspect} */")
1590 self.require_declaration
(a
.const_color
)
1591 if self.compiler
.modelbuilder
.toolcontext
.opt_no_union_attribute
.value
then
1592 self.add
("{res} = {recv}->attrs[{a.const_color}] != NULL; /* {a} on {recv.inspect}*/")
1595 if mtype
.ctype
== "val*" then
1596 self.add
("{res} = {recv}->attrs[{a.const_color}].val != NULL; /* {a} on {recv.inspect} */")
1598 self.add
("{res} = 1; /* NOT YET IMPLEMENTED: isset of primitives: {a} on {recv.inspect} */")
1604 redef fun read_attribute
(a
, recv
)
1606 self.check_recv_notnull
(recv
)
1608 # What is the declared type of the attribute?
1609 var ret
= a
.intro
.static_mtype
.as(not null)
1610 var intromclassdef
= a
.intro
.mclassdef
1611 ret
= ret
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
1613 if self.compiler
.modelbuilder
.toolcontext
.opt_isset_checks_metrics
.value
then
1614 self.compiler
.attr_read_count
+= 1
1615 self.add
("count_attr_reads++;")
1618 self.require_declaration
(a
.const_color
)
1619 if self.compiler
.modelbuilder
.toolcontext
.opt_no_union_attribute
.value
then
1620 # Get the attribute or a box (ie. always a val*)
1621 var cret
= self.object_type
.as_nullable
1622 var res
= self.new_var
(cret
)
1625 self.add
("{res} = {recv}->attrs[{a.const_color}]; /* {a} on {recv.inspect} */")
1627 # Check for Uninitialized attribute
1628 if not ret
isa MNullableType and not self.compiler
.modelbuilder
.toolcontext
.opt_no_check_attr_isset
.value
then
1629 self.add
("if (unlikely({res} == NULL)) \{")
1630 self.add_abort
("Uninitialized attribute {a.name}")
1633 if self.compiler
.modelbuilder
.toolcontext
.opt_isset_checks_metrics
.value
then
1634 self.compiler
.isset_checks_count
+= 1
1635 self.add
("count_isset_checks++;")
1639 # Return the attribute or its unboxed version
1640 # Note: it is mandatory since we reuse the box on write, we do not whant that the box escapes
1641 return self.autobox
(res
, ret
)
1643 var res
= self.new_var
(ret
)
1644 self.add
("{res} = {recv}->attrs[{a.const_color}].{ret.ctypename}; /* {a} on {recv.inspect} */")
1646 # Check for Uninitialized attribute
1647 if ret
.ctype
== "val*" and not ret
isa MNullableType and not self.compiler
.modelbuilder
.toolcontext
.opt_no_check_attr_isset
.value
then
1648 self.add
("if (unlikely({res} == NULL)) \{")
1649 self.add_abort
("Uninitialized attribute {a.name}")
1651 if self.compiler
.modelbuilder
.toolcontext
.opt_isset_checks_metrics
.value
then
1652 self.compiler
.isset_checks_count
+= 1
1653 self.add
("count_isset_checks++;")
1661 redef fun write_attribute
(a
, recv
, value
)
1663 self.check_recv_notnull
(recv
)
1665 # What is the declared type of the attribute?
1666 var mtype
= a
.intro
.static_mtype
.as(not null)
1667 var intromclassdef
= a
.intro
.mclassdef
1668 mtype
= mtype
.resolve_for
(intromclassdef
.bound_mtype
, intromclassdef
.bound_mtype
, intromclassdef
.mmodule
, true)
1670 # Adapt the value to the declared type
1671 value
= self.autobox
(value
, mtype
)
1673 self.require_declaration
(a
.const_color
)
1674 if self.compiler
.modelbuilder
.toolcontext
.opt_no_union_attribute
.value
then
1675 var attr
= "{recv}->attrs[{a.const_color}]"
1676 if mtype
.ctype
!= "val*" then
1677 assert mtype
isa MClassType
1678 # The attribute is primitive, thus we store it in a box
1679 # The trick is to create the box the first time then resuse the box
1680 self.add
("if ({attr} != NULL) \{")
1681 self.add
("((struct instance_{mtype.c_name}*){attr})->value = {value}; /* {a} on {recv.inspect} */")
1682 self.add
("\} else \{")
1683 value
= self.autobox
(value
, self.object_type
.as_nullable
)
1684 self.add
("{attr} = {value}; /* {a} on {recv.inspect} */")
1687 # The attribute is not primitive, thus store it direclty
1688 self.add
("{attr} = {value}; /* {a} on {recv.inspect} */")
1691 self.add
("{recv}->attrs[{a.const_color}].{mtype.ctypename} = {value}; /* {a} on {recv.inspect} */")
1695 # Check that mtype is a live open type
1696 fun hardening_live_open_type
(mtype
: MType)
1698 if not compiler
.modelbuilder
.toolcontext
.opt_hardening
.value
then return
1699 self.require_declaration
(mtype
.const_color
)
1700 var col
= mtype
.const_color
1701 self.add
("if({col} == -1) \{")
1702 self.add
("PRINT_ERROR(\"Resolution of a dead open
type: %s\\n\
", \"{mtype.to_s.escape_to_c}\
");")
1703 self.add_abort
("open type dead")
1707 # Check that mtype it a pointer to a live cast type
1708 fun hardening_cast_type
(t
: String)
1710 if not compiler
.modelbuilder
.toolcontext
.opt_hardening
.value
then return
1711 add
("if({t} == NULL) \{")
1712 add_abort
("cast type null")
1714 add
("if({t}->id == -1 || {t}->color == -1) \{")
1715 add
("PRINT_ERROR(\"Try to cast on a dead cast
type: %s\\n\
", {t}->name);")
1716 add_abort
("cast type dead")
1720 redef fun init_instance
(mtype
)
1722 self.require_declaration
("NEW_{mtype.mclass.c_name}")
1723 var compiler
= self.compiler
1724 if mtype
isa MGenericType and mtype
.need_anchor
then
1725 hardening_live_open_type
(mtype
)
1726 link_unresolved_type
(self.frame
.mpropdef
.mclassdef
, mtype
)
1727 var recv
= self.frame
.arguments
.first
1728 var recv_type_info
= self.type_info
(recv
)
1729 self.require_declaration
(mtype
.const_color
)
1730 return self.new_expr
("NEW_{mtype.mclass.c_name}({recv_type_info}->resolution_table->types[{mtype.const_color}])", mtype
)
1732 compiler
.undead_types
.add
(mtype
)
1733 self.require_declaration
("type_{mtype.c_name}")
1734 return self.new_expr
("NEW_{mtype.mclass.c_name}(&type_{mtype.c_name})", mtype
)
1737 redef fun type_test
(value
, mtype
, tag
)
1739 self.add
("/* {value.inspect} isa {mtype} */")
1740 var compiler
= self.compiler
1742 var recv
= self.frame
.arguments
.first
1743 var recv_type_info
= self.type_info
(recv
)
1745 var res
= self.new_var
(bool_type
)
1747 var cltype
= self.get_name
("cltype")
1748 self.add_decl
("int {cltype};")
1749 var idtype
= self.get_name
("idtype")
1750 self.add_decl
("int {idtype};")
1752 var maybe_null
= self.maybe_null
(value
)
1753 var accept_null
= "0"
1755 if ntype
isa MNullableType then
1760 if value
.mcasttype
.is_subtype
(self.frame
.mpropdef
.mclassdef
.mmodule
, self.frame
.mpropdef
.mclassdef
.bound_mtype
, mtype
) then
1761 self.add
("{res} = 1; /* easy {value.inspect} isa {mtype}*/")
1762 if compiler
.modelbuilder
.toolcontext
.opt_typing_test_metrics
.value
then
1763 self.compiler
.count_type_test_skipped
[tag
] += 1
1764 self.add
("count_type_test_skipped_{tag}++;")
1769 if ntype
.need_anchor
then
1770 var type_struct
= self.get_name
("type_struct")
1771 self.add_decl
("const struct type* {type_struct};")
1773 # Either with resolution_table with a direct resolution
1774 hardening_live_open_type
(mtype
)
1775 link_unresolved_type
(self.frame
.mpropdef
.mclassdef
, mtype
)
1776 self.require_declaration
(mtype
.const_color
)
1777 self.add
("{type_struct} = {recv_type_info}->resolution_table->types[{mtype.const_color}];")
1778 if compiler
.modelbuilder
.toolcontext
.opt_typing_test_metrics
.value
then
1779 self.compiler
.count_type_test_unresolved
[tag
] += 1
1780 self.add
("count_type_test_unresolved_{tag}++;")
1782 hardening_cast_type
(type_struct
)
1783 self.add
("{cltype} = {type_struct}->color;")
1784 self.add
("{idtype} = {type_struct}->id;")
1785 if maybe_null
and accept_null
== "0" then
1786 var is_nullable
= self.get_name
("is_nullable")
1787 self.add_decl
("short int {is_nullable};")
1788 self.add
("{is_nullable} = {type_struct}->is_nullable;")
1789 accept_null
= is_nullable
.to_s
1791 else if ntype
isa MClassType then
1792 compiler
.undead_types
.add
(mtype
)
1793 self.require_declaration
("type_{mtype.c_name}")
1794 hardening_cast_type
("(&type_{mtype.c_name})")
1795 self.add
("{cltype} = type_{mtype.c_name}.color;")
1796 self.add
("{idtype} = type_{mtype.c_name}.id;")
1797 if compiler
.modelbuilder
.toolcontext
.opt_typing_test_metrics
.value
then
1798 self.compiler
.count_type_test_resolved
[tag
] += 1
1799 self.add
("count_type_test_resolved_{tag}++;")
1802 self.add
("PRINT_ERROR(\"NOT YET IMPLEMENTED: type_test
(%s
, {mtype}).\\n\
", \"{value.inspect}\
"); fatal_exit(1);")
1805 # check color is in table
1807 self.add
("if({value} == NULL) \{")
1808 self.add
("{res} = {accept_null};")
1809 self.add
("\} else \{")
1811 var value_type_info
= self.type_info
(value
)
1812 self.add
("if({cltype} >= {value_type_info}->table_size) \{")
1813 self.add
("{res} = 0;")
1814 self.add
("\} else \{")
1815 self.add
("{res} = {value_type_info}->type_table[{cltype}] == {idtype};")
1824 redef fun is_same_type_test
(value1
, value2
)
1826 var res
= self.new_var
(bool_type
)
1827 # Swap values to be symetric
1828 if value2
.mtype
.ctype
!= "val*" and value1
.mtype
.ctype
== "val*" then
1833 if value1
.mtype
.ctype
!= "val*" then
1834 if value2
.mtype
== value1
.mtype
then
1835 self.add
("{res} = 1; /* is_same_type_test: compatible types {value1.mtype} vs. {value2.mtype} */")
1836 else if value2
.mtype
.ctype
!= "val*" then
1837 self.add
("{res} = 0; /* is_same_type_test: incompatible types {value1.mtype} vs. {value2.mtype}*/")
1839 var mtype1
= value1
.mtype
.as(MClassType)
1840 self.require_declaration
("class_{mtype1.c_name}")
1841 self.add
("{res} = ({value2} != NULL) && ({value2}->class == &class_{mtype1.c_name}); /* is_same_type_test */")
1844 self.add
("{res} = ({value1} == {value2}) || ({value1} != NULL && {value2} != NULL && {class_info(value1)} == {class_info(value2)}); /* is_same_type_test */")
1849 redef fun class_name_string
(value
)
1851 var res
= self.get_name
("var_class_name")
1852 self.add_decl
("const char* {res};")
1853 if value
.mtype
.ctype
== "val*" then
1854 self.add
"{res} = {value} == NULL ? \"null\
" : {type_info(value)}->name;"
1855 else if value
.mtype
isa MClassType and value
.mtype
.as(MClassType).mclass
.kind
== extern_kind
and
1856 value
.mtype
.as(MClassType).name
!= "NativeString" then
1857 self.add
"{res} = \"{value.mtype.as(MClassType).mclass}\
";"
1859 self.require_declaration
("type_{value.mtype.c_name}")
1860 self.add
"{res} = type_{value.mtype.c_name}.name;"
1865 redef fun equal_test
(value1
, value2
)
1867 var res
= self.new_var
(bool_type
)
1868 if value2
.mtype
.ctype
!= "val*" and value1
.mtype
.ctype
== "val*" then
1873 if value1
.mtype
.ctype
!= "val*" then
1874 if value2
.mtype
== value1
.mtype
then
1875 self.add
("{res} = {value1} == {value2};")
1876 else if value2
.mtype
.ctype
!= "val*" then
1877 self.add
("{res} = 0; /* incompatible types {value1.mtype} vs. {value2.mtype}*/")
1878 else if value1
.mtype
.is_tagged
then
1879 self.add
("{res} = ({value2} != NULL) && ({self.autobox(value2, value1.mtype)} == {value1});")
1881 var mtype1
= value1
.mtype
.as(MClassType)
1882 self.require_declaration
("class_{mtype1.c_name}")
1883 self.add
("{res} = ({value2} != NULL) && ({value2}->class == &class_{mtype1.c_name});")
1884 self.add
("if ({res}) \{")
1885 self.add
("{res} = ({self.autobox(value2, value1.mtype)} == {value1});")
1890 var maybe_null
= true
1891 var test
= new Array[String]
1892 var t1
= value1
.mcasttype
1893 if t1
isa MNullableType then
1894 test
.add
("{value1} != NULL")
1899 var t2
= value2
.mcasttype
1900 if t2
isa MNullableType then
1901 test
.add
("{value2} != NULL")
1907 var incompatible
= false
1909 if t1
.ctype
!= "val*" then
1912 # No need to compare class
1913 else if t2
.ctype
!= "val*" then
1915 else if can_be_primitive
(value2
) then
1916 if t1
.is_tagged
then
1917 self.add
("{res} = {value1} == {value2};")
1920 if not compiler
.modelbuilder
.toolcontext
.opt_no_tag_primitives
.value
then
1921 test
.add
("(!{extract_tag(value2)})")
1923 test
.add
("{value1}->class == {value2}->class")
1927 else if t2
.ctype
!= "val*" then
1929 if can_be_primitive
(value1
) then
1930 if t2
.is_tagged
then
1931 self.add
("{res} = {value1} == {value2};")
1934 if not compiler
.modelbuilder
.toolcontext
.opt_no_tag_primitives
.value
then
1935 test
.add
("(!{extract_tag(value1)})")
1937 test
.add
("{value1}->class == {value2}->class")
1945 if incompatible
then
1947 self.add
("{res} = {value1} == {value2}; /* incompatible types {t1} vs. {t2}; but may be NULL*/")
1950 self.add
("{res} = 0; /* incompatible types {t1} vs. {t2}; cannot be NULL */")
1954 if primitive
!= null then
1955 if primitive
.is_tagged
then
1956 self.add
("{res} = {value1} == {value2};")
1959 test
.add
("((struct instance_{primitive.c_name}*){value1})->value == ((struct instance_{primitive.c_name}*){value2})->value")
1960 else if can_be_primitive
(value1
) and can_be_primitive
(value2
) then
1961 if not compiler
.modelbuilder
.toolcontext
.opt_no_tag_primitives
.value
then
1962 test
.add
("(!{extract_tag(value1)}) && (!{extract_tag(value2)})")
1964 test
.add
("{value1}->class == {value2}->class")
1965 var s
= new Array[String]
1966 for t
, v
in self.compiler
.box_kinds
do
1967 if t
.mclass_type
.is_tagged
then continue
1968 s
.add
"({value1}->class->box_kind == {v} && ((struct instance_{t.c_name}*){value1})->value == ((struct instance_{t.c_name}*){value2})->value)"
1971 self.add
("{res} = {value1} == {value2};")
1974 test
.add
("({s.join(" || ")})")
1976 self.add
("{res} = {value1} == {value2};")
1979 self.add
("{res} = {value1} == {value2} || ({test.join(" && ")});")
1983 fun can_be_primitive
(value
: RuntimeVariable): Bool
1985 var t
= value
.mcasttype
.as_notnullable
1986 if not t
isa MClassType then return false
1987 var k
= t
.mclass
.kind
1988 return k
== interface_kind
or t
.ctype
!= "val*"
1991 fun maybe_null
(value
: RuntimeVariable): Bool
1993 var t
= value
.mcasttype
1994 return t
isa MNullableType or t
isa MNullType
1997 redef fun array_instance
(array
, elttype
)
1999 var nclass
= self.get_class
("NativeArray")
2000 var arrayclass
= self.get_class
("Array")
2001 var arraytype
= arrayclass
.get_mtype
([elttype
])
2002 var res
= self.init_instance
(arraytype
)
2003 self.add
("\{ /* {res} = array_instance Array[{elttype}] */")
2004 var length
= self.int_instance
(array
.length
)
2005 var nat
= native_array_instance
(elttype
, length
)
2006 for i
in [0..array
.length
[ do
2007 var r
= self.autobox
(array
[i
], self.object_type
)
2008 self.add
("((struct instance_{nclass.c_name}*){nat})->values[{i}] = (val*) {r};")
2010 self.send
(self.get_property
("with_native", arrayclass
.intro
.bound_mtype
), [res
, nat
, length
])
2015 redef fun native_array_instance
(elttype
: MType, length
: RuntimeVariable): RuntimeVariable
2017 var mtype
= self.get_class
("NativeArray").get_mtype
([elttype
])
2018 self.require_declaration
("NEW_{mtype.mclass.c_name}")
2019 assert mtype
isa MGenericType
2020 var compiler
= self.compiler
2021 if mtype
.need_anchor
then
2022 hardening_live_open_type
(mtype
)
2023 link_unresolved_type
(self.frame
.mpropdef
.mclassdef
, mtype
)
2024 var recv
= self.frame
.arguments
.first
2025 var recv_type_info
= self.type_info
(recv
)
2026 self.require_declaration
(mtype
.const_color
)
2027 return self.new_expr
("NEW_{mtype.mclass.c_name}({length}, {recv_type_info}->resolution_table->types[{mtype.const_color}])", mtype
)
2029 compiler
.undead_types
.add
(mtype
)
2030 self.require_declaration
("type_{mtype.c_name}")
2031 return self.new_expr
("NEW_{mtype.mclass.c_name}({length}, &type_{mtype.c_name})", mtype
)
2034 redef fun native_array_def
(pname
, ret_type
, arguments
)
2036 var elttype
= arguments
.first
.mtype
2037 var nclass
= self.get_class
("NativeArray")
2038 var recv
= "((struct instance_{nclass.c_name}*){arguments[0]})->values"
2039 if pname
== "[]" then
2040 # Because the objects are boxed, return the box to avoid unnecessary (or broken) unboxing/reboxing
2041 var res
= self.new_expr
("{recv}[{arguments[1]}]", compiler
.mainmodule
.object_type
)
2042 res
.mcasttype
= ret_type
.as(not null)
2045 else if pname
== "[]=" then
2046 self.add
("{recv}[{arguments[1]}]={arguments[2]};")
2048 else if pname
== "length" then
2049 self.ret
(self.new_expr
("((struct instance_{nclass.c_name}*){arguments[0]})->length", ret_type
.as(not null)))
2051 else if pname
== "copy_to" then
2052 var recv1
= "((struct instance_{nclass.c_name}*){arguments[1]})->values"
2053 self.add
("memmove({recv1}, {recv}, {arguments[2]}*sizeof({elttype.ctype}));")
2058 redef fun calloc_array
(ret_type
, arguments
)
2060 var mclass
= self.get_class
("ArrayCapable")
2061 var ft
= mclass
.mparameters
.first
2062 var res
= self.native_array_instance
(ft
, arguments
[1])
2066 fun link_unresolved_type
(mclassdef
: MClassDef, mtype
: MType) do
2067 assert mtype
.need_anchor
2068 var compiler
= self.compiler
2069 if not compiler
.live_unresolved_types
.has_key
(self.frame
.mpropdef
.mclassdef
) then
2070 compiler
.live_unresolved_types
[self.frame
.mpropdef
.mclassdef
] = new HashSet[MType]
2072 compiler
.live_unresolved_types
[self.frame
.mpropdef
.mclassdef
].add
(mtype
)
2076 redef class MMethodDef
2077 # The C function associated to a mmethoddef
2078 fun separate_runtime_function
: SeparateRuntimeFunction
2080 var res
= self.separate_runtime_function_cache
2082 var recv
= mclassdef
.bound_mtype
2083 var msignature
= msignature
.resolve_for
(recv
, recv
, mclassdef
.mmodule
, true)
2084 res
= new SeparateRuntimeFunction(self, recv
, msignature
, c_name
)
2085 self.separate_runtime_function_cache
= res
2089 private var separate_runtime_function_cache
: nullable SeparateRuntimeFunction
2091 # The C function associated to a mmethoddef, that can be stored into a VFT of a class
2092 # The first parameter (the reciever) is always typed by val* in order to accept an object value
2093 # The C-signature is always compatible with the intro
2094 fun virtual_runtime_function
: SeparateRuntimeFunction
2096 var res
= self.virtual_runtime_function_cache
2098 # Because the function is virtual, the signature must match the one of the original class
2099 var intromclassdef
= mproperty
.intro
.mclassdef
2100 var recv
= intromclassdef
.bound_mtype
2102 res
= separate_runtime_function
2103 if res
.called_recv
== recv
then
2104 self.virtual_runtime_function_cache
= res
2108 var msignature
= mproperty
.intro
.msignature
.resolve_for
(recv
, recv
, intromclassdef
.mmodule
, true)
2110 if recv
.ctype
== res
.called_recv
.ctype
and msignature
.c_equiv
(res
.called_signature
) then
2111 self.virtual_runtime_function_cache
= res
2115 res
= new SeparateRuntimeFunction(self, recv
, msignature
, "VIRTUAL_{c_name}")
2116 self.virtual_runtime_function_cache
= res
2121 private var virtual_runtime_function_cache
: nullable SeparateRuntimeFunction
2124 redef class MSignature
2125 # Does the C-version of `self` the same than the C-version of `other`?
2126 fun c_equiv
(other
: MSignature): Bool
2128 if self == other
then return true
2129 if arity
!= other
.arity
then return false
2130 for i
in [0..arity
[ do
2131 if mparameters
[i
].mtype
.ctype
!= other
.mparameters
[i
].mtype
.ctype
then return false
2133 if return_mtype
!= other
.return_mtype
then
2134 if return_mtype
== null or other
.return_mtype
== null then return false
2135 if return_mtype
.ctype
!= other
.return_mtype
.ctype
then return false
2141 # The C function associated to a methoddef separately compiled
2142 class SeparateRuntimeFunction
2143 super AbstractRuntimeFunction
2145 # The call-side static receiver
2146 var called_recv
: MType
2148 # The call-side static signature
2149 var called_signature
: MSignature
2151 # The name on the compiled method
2152 redef var build_c_name
: String
2154 # Statically call the original body instead
2155 var is_thunk
= false
2157 redef fun to_s
do return self.mmethoddef
.to_s
2159 # The C return type (something or `void`)
2160 var c_ret
: String is lazy
do
2161 var ret
= called_signature
.return_mtype
2169 # The C signature (only the parmeter part)
2170 var c_sig
: String is lazy
do
2171 var sig
= new FlatBuffer
2172 sig
.append
("({called_recv.ctype} self")
2173 for i
in [0..called_signature
.arity
[ do
2174 var mtype
= called_signature
.mparameters
[i
].mtype
2175 if i
== called_signature
.vararg_rank
then
2176 mtype
= mmethoddef
.mclassdef
.mmodule
.get_primitive_class
("Array").get_mtype
([mtype
])
2178 sig
.append
(", {mtype.ctype} p{i}")
2184 # The C type for the function pointer.
2185 var c_funptrtype
: String is lazy
do return "{c_ret}(*){c_sig}"
2187 # The arguments, as generated by `compile_to_c`
2188 private var arguments
: Array[RuntimeVariable] is noinit
2190 redef fun compile_to_c
(compiler
)
2192 var mmethoddef
= self.mmethoddef
2194 var recv
= self.mmethoddef
.mclassdef
.bound_mtype
2195 var v
= compiler
.new_visitor
2196 var selfvar
= new RuntimeVariable("self", called_recv
, recv
)
2197 var arguments
= new Array[RuntimeVariable]
2198 var frame
= new StaticFrame(v
, mmethoddef
, recv
, arguments
)
2201 var msignature
= called_signature
2202 var ret
= called_signature
.return_mtype
2204 var sig
= new FlatBuffer
2205 var comment
= new FlatBuffer
2208 sig
.append
(self.c_name
)
2210 comment
.append
("({selfvar}: {selfvar.mtype}")
2211 arguments
.add
(selfvar
)
2212 for i
in [0..msignature
.arity
[ do
2213 var mtype
= msignature
.mparameters
[i
].mtype
2214 if i
== msignature
.vararg_rank
then
2215 mtype
= v
.get_class
("Array").get_mtype
([mtype
])
2217 comment
.append
(", {mtype}")
2218 var argvar
= new RuntimeVariable("p{i}", mtype
, mtype
)
2219 arguments
.add
(argvar
)
2223 comment
.append
(": {ret}")
2225 compiler
.provide_declaration
(self.c_name
, "{sig};")
2226 self.arguments
= arguments
.to_a
2228 v
.add_decl
("/* method {self} for {comment} */")
2229 v
.add_decl
("{sig} \{")
2231 frame
.returnvar
= v
.new_var
(ret
)
2233 frame
.returnlabel
= v
.get_name
("RET_LABEL")
2236 var subret
= v
.call
(mmethoddef
, recv
, arguments
)
2238 assert subret
!= null
2239 v
.assign
(frame
.returnvar
.as(not null), subret
)
2242 mmethoddef
.compile_inside_to_c
(v
, arguments
)
2245 v
.add
("{frame.returnlabel.as(not null)}:;")
2247 v
.add
("return {frame.returnvar.as(not null)};")
2250 compiler
.names
[self.c_name
] = "{mmethoddef.full_name} ({mmethoddef.location.file.filename}:{mmethoddef.location.line_start})"
2253 # Compile the trampolines used to implement late-binding.
2255 # See `opt_trampoline_call`.
2256 fun compile_trampolines
(compiler
: SeparateCompiler)
2258 var recv
= self.mmethoddef
.mclassdef
.bound_mtype
2259 var selfvar
= arguments
.first
2260 var ret
= called_signature
.return_mtype
2262 if mmethoddef
.is_intro
and recv
.ctype
== "val*" then
2263 var m
= mmethoddef
.mproperty
2264 var n2
= "CALL_" + m
.const_color
2265 compiler
.provide_declaration
(n2
, "{c_ret} {n2}{c_sig};")
2266 var v2
= compiler
.new_visitor
2267 v2
.add
"{c_ret} {n2}{c_sig} \{"
2268 v2
.require_declaration
(m
.const_color
)
2269 var call
= "(({c_funptrtype})({selfvar}->class->vft[{m.const_color}]))({arguments.join(", ")});"
2271 v2
.add
"return {call}"
2279 if mmethoddef
.has_supercall
and recv
.ctype
== "val*" then
2281 var n2
= "CALL_" + m
.const_color
2282 compiler
.provide_declaration
(n2
, "{c_ret} {n2}{c_sig};")
2283 var v2
= compiler
.new_visitor
2284 v2
.add
"{c_ret} {n2}{c_sig} \{"
2285 v2
.require_declaration
(m
.const_color
)
2286 var call
= "(({c_funptrtype})({selfvar}->class->vft[{m.const_color}]))({arguments.join(", ")});"
2288 v2
.add
"return {call}"
2299 # Are values of `self` tagged?
2300 # If false, it means that the type is not primitive, or is boxed.
2301 var is_tagged
= false
2305 var const_color
: String is lazy
do return "COLOR_{c_name}"
2308 interface PropertyLayoutElement end
2310 redef class MProperty
2311 super PropertyLayoutElement
2314 redef class MPropDef
2315 super PropertyLayoutElement
2318 redef class AMethPropdef
2319 # The semi-global compilation does not support inlining calls to extern news
2320 redef fun can_inline
2323 if m
!= null and m
.mproperty
.is_init
and m
.is_extern
then return false