1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2009 Jean Privat <jean@pryen.org>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # Things needed by typing.nit to generate intermediate code from AST
18 package icode_generation
23 private import primitive_info
25 # An AST2ICode context stores the currently built icode informations
28 redef fun stmt
(s
: ICode)
30 if _current_node
!= null then
31 current_location
= _current_node
.location
32 else if visitor
.current_node
!= null then
33 current_location
= visitor
.current_node
.location
38 # Prepare a new array of length item
39 fun add_new_array
(stype
: MMType, length
: Int): IRegister
41 var prop
= visitor
.get_method
(stype
, once
"with_capacity".to_symbol
)
42 var ni
= expr
(new INative("TAG_Int({length})", null), visitor
.type_int
)
43 return expr
(new INew(stype
, prop
, [ni
]), stype
)
47 fun add_call_array_add
(recv
, item
: IRegister)
49 var stype
= recv
.stype
50 var prop
= visitor
.get_method
(stype
, once
"add".to_symbol
)
51 stmt
(new ICall(prop
, [recv
, item
]))
54 # Get the iregister associated with a variable
55 # Or assign one if none exists
56 fun variable
(v
: Variable): IRegister
58 if _variables
.has_key
(v
) then
61 var reg
= new_register
(v
.stype
.as(not null))
67 # Current registered variable
68 var _variables
: HashMap[Variable, IRegister] = new HashMap[Variable, IRegister]
70 # Current registered closurevariables
71 readable var _closurevariables
: HashMap[ClosureVariable, IClosureDecl] = new HashMap[ClosureVariable, IClosureDecl]
73 # The current syntax visitor
74 readable var _visitor
: AbsSyntaxVisitor
76 # Where a nit return must branch
77 readable writable var _return_seq
: nullable ISeq
79 # Register where a functionnal nit return must store its value
80 readable writable var _return_value
: nullable IRegister
82 init(visitor
: AbsSyntaxVisitor, r
: IRoutine, m
: nullable MMMethod)
84 super(visitor
.module, r
, m
)
87 _return_value
= r
.result
90 # Insert implicit super init calls
91 fun invoke_super_init_calls_after
(start_prop
: nullable MMMethod)
94 assert p
isa MMSrcMethod
96 assert n
isa AConcreteInitPropdef
98 if n
.super_init_calls
.is_empty
then return
101 if start_prop
!= null then
102 while n
.super_init_calls
[i
] != start_prop
do
107 while n
.explicit_super_init_calls
[j
] != start_prop
do
112 var stop_prop
: nullable MMMethod = null
113 if j
< n
.explicit_super_init_calls
.length
then
114 stop_prop
= n
.explicit_super_init_calls
[j
]
116 var l
= n
.super_init_calls
.length
118 var p
= n
.super_init_calls
[i
]
119 if p
== stop_prop
then break
120 var cargs
= new Array[IRegister]
121 if p
.signature
.arity
== 0 then
122 cargs
.add
(iroutine
.params
.first
)
124 for va
in iroutine
.params
do
128 stmt
(new ICall(p
, cargs
))
134 var _current_node
: nullable AExpr = null
136 # Generate icode in the current sequence from a statement
137 fun generate_stmt
(n
: nullable AExpr)
139 if n
== null then return
140 var old
= _current_node
142 n
.generate_icode
(self)
146 # Generate icode in the current sequence from an expression
147 fun generate_expr
(n
: AExpr): IRegister
149 var old
= _current_node
151 var reg
= n
.generate_icode
(self).as(not null)
157 redef class EscapableBlock
158 # Where a nit break must branch
159 readable writable var _break_seq
: nullable ISeq
161 # Where a nit continue must branch
162 readable writable var _continue_seq
: nullable ISeq
164 # Register where a functionnal nit break must store its value
165 readable writable var _break_value
: nullable IRegister
167 # Register where a functionnal nit continue must store its value
168 readable writable var _continue_value
: nullable IRegister
171 redef class MMSrcModule
172 # Generate icode for method bodies
173 fun generate_icode
(tc
: ToolContext)
175 var v
= new A2IVisitor(tc
, self)
176 for c
in src_local_classes
do
177 for p
in c
.src_local_properties
do
178 if p
isa MMSrcMethod then
179 p
.generate_iroutine
(v
)
180 else if p
isa MMSrcAttribute then
181 p
.generate_iroutine
(v
)
188 redef class MMSrcAttribute
189 redef readable writable var _iroutine
: nullable IRoutine
191 # Generate the initialization iroutine
192 fun generate_iroutine
(visitor
: A2IVisitor)
194 if node
.n_expr
!= null then
195 var iroutine
= signature
.generate_empty_iroutine
196 iroutine
.location
= node
.location
197 var v
= new A2IContext(visitor
, iroutine
, null)
198 visitor
.icode_ctx
= v
199 visitor
.enter_visit
(node
)
200 visitor
.icode_ctx
= null
206 redef class MMSrcMethod
207 redef readable writable var _iroutine
: nullable IRoutine
209 # Generate the body iroutine
210 fun generate_iroutine
(visitor
: A2IVisitor)
212 var iroutine
= signature
.generate_empty_iroutine
214 iroutine
.location
= node
.location
216 var v
= new A2IContext(visitor
, iroutine
, self)
217 visitor
.icode_ctx
= v
218 inner_generate_iroutine
(v
)
219 visitor
.icode_ctx
= null
223 # Generate the body iroutine (specific part)
224 fun inner_generate_iroutine
(v
: A2IContext) is abstract
227 redef class MMReadImplementationMethod
228 redef fun inner_generate_iroutine
(v
)
230 var e
= v
.add_attr_read
(node
.prop
, v
.iroutine
.params
.first
)
231 v
.add_return_value
(e
)
235 redef class MMWriteImplementationMethod
236 redef fun inner_generate_iroutine
(v
)
238 var params
= v
.iroutine
.params
239 v
.stmt
(new IAttrWrite(node
.prop
, params
[0], params
[1]))
243 redef class MMMethSrcMethod
244 redef fun inner_generate_iroutine
(v
)
246 v
.visitor
.enter_visit
(node
)
250 redef class MMImplicitInit
251 redef fun inner_generate_iroutine
(v
)
253 var params
= v
.iroutine
.params
254 var f
= params
.length
- unassigned_attributes
.length
255 var recv
= params
.first
256 for sp
in super_inits
do
257 assert sp
isa MMMethod
258 var args_recv
= [recv
]
259 if sp
== super_init
then
260 var args
= new Array[IRegister].with_capacity
(f
)
265 v
.stmt
(new ICall(sp
, args
))
267 v
.stmt
(new ICall(sp
, args_recv
))
270 for i
in [f
..params
.length
[ do
271 var attribute
= unassigned_attributes
[i-f
]
272 v
.stmt
(new IAttrWrite(attribute
, recv
, params
[i
]))
278 special AbsSyntaxVisitor
279 writable var _icode_ctx
: nullable A2IContext
280 fun icode_ctx
: A2IContext do return _icode_ctx
.as(not null)
281 redef fun visit
(n
) do n
.accept_icode_generation
(self)
286 ###############################################################################
289 fun accept_icode_generation
(v
: A2IVisitor) do accept_abs_syntax_visitor
(v
) end
292 redef class AAttrPropdef
293 redef fun accept_icode_generation
(vv
)
296 v
.stmt
(new IMove(v
.variable
(self_var
), v
.iroutine
.params
.first
))
300 v
.stmt
(new IMove(v
.iroutine
.result
.as(not null), v
.generate_expr
(ne
)))
305 redef class AMethPropdef
306 redef fun accept_icode_generation
(vv
)
309 fill_iroutine
(vv
.icode_ctx
, method
)
312 # Compile the method body common preambule (before specific body stuff if any)
313 fun fill_iroutine
(v
: A2IContext, method
: MMSrcMethod) is abstract
316 redef class ASignature
317 fun fill_iroutine_parameters
(v
: A2IContext, orig_sig
: MMSignature, params
: Sequence[IRegister], closdecls
: nullable Sequence[IClosureDecl])
319 for ap
in n_params
do
320 var reg
= v
.variable
(ap
.variable
)
321 var orig_type
= orig_sig
[ap
.position
]
322 var apst
= ap
.variable
.stype
.as(not null)
323 if not orig_type
< apst
then
324 v
.add_type_cast
(params
[ap
.position
], apst
)
326 v
.stmt
(new IMove(reg
, params
[ap
.position
]))
328 for i
in [0..n_closure_decls
.length
[ do
329 var wd
= n_closure_decls
[i
]
330 v
.closurevariables
[wd
.variable
] = closdecls
[i
]
335 redef class AClosureDecl
336 redef fun accept_icode_generation
(vv
)
339 var iclos
= variable
.closure
.signature
.generate_empty_iclosuredef
342 escapable
.continue_seq
= iclos
.body
343 escapable
.continue_value
= iclos
.result
344 n_signature
.fill_iroutine_parameters
(v
, variable
.closure
.signature
, iclos
.params
, null)
346 if n_expr
!= null then
347 v
.generate_stmt
(n_expr
)
348 v
.iroutine
.closure_decls
[position
].default
= iclos
354 redef class AConcreteMethPropdef
355 redef fun fill_iroutine
(v
, method
)
357 var params
= v
.iroutine
.params
.to_a
358 var selfreg
= v
.variable
(self_var
)
359 v
.stmt
(new IMove(selfreg
, params
[0]))
362 var orig_meth
: MMLocalProperty = method
.global
.intro
363 var orig_sig
= orig_meth
.signature_for
(method
.signature
.recv
)
364 if n_signature
!= null then
365 n_signature
.fill_iroutine_parameters
(v
, orig_sig
, params
, v
.iroutine
.closure_decls
)
368 if self isa AConcreteInitPropdef then
369 v
.invoke_super_init_calls_after
(null)
372 if n_block
!= null then
373 v
.generate_stmt
(n_block
)
378 redef class ADeferredMethPropdef
379 redef fun fill_iroutine
(v
, method
)
381 v
.add_abort
("Deferred method called")
385 redef class AExternMethPropdef
386 redef fun fill_iroutine
(v
, method
)
388 var params
= v
.iroutine
.params
389 var ename
= "{method.module.name}_{method.local_class.name}_{method.local_class.name}_{method.name}_{method.signature.arity}"
390 if n_extern
!= null then
391 ename
= n_extern
.text
392 ename
= ename
.substring
(1, ename
.length-2
)
394 var sig
= method
.signature
395 assert params
.length
== sig
.arity
+ 1
396 var args
= new Array[String]
397 args
.add
(sig
.recv
.unboxtype
("@@@"))
398 for i
in [0..sig
.arity
[ do
399 args
.add
(sig
[i
].unboxtype
("@@@"))
401 var s
= "{ename}({args.join(", ")})"
402 var rtype
= sig
.return_type
403 if rtype
!= null then
405 v
.add_return_value
(v
.expr
(new INative(s
, params
), rtype
))
407 v
.stmt
(new INative(s
, params
))
412 redef class AInternMethPropdef
413 redef fun fill_iroutine
(v
, method
)
415 var p
= v
.iroutine
.params
.to_a
416 var c
= method
.local_class
.name
418 var s
: nullable String = null
419 if c
== once
"Int".to_symbol
then
420 if n
== once
"object_id".to_symbol
then
422 else if n
== once
"unary -".to_symbol
then
423 s
= "TAG_Int(-UNTAG_Int(@@@))"
424 else if n
== once
"output".to_symbol
then
425 s
= "printf(\"%ld\\n\
", UNTAG_Int(@@@));"
426 else if n
== once
"ascii".to_symbol
then
427 s
= "TAG_Char(UNTAG_Int(@@@))"
428 else if n
== once
"succ".to_symbol
then
429 s
= "TAG_Int(UNTAG_Int(@@@)+1)"
430 else if n
== once
"prec".to_symbol
then
431 s
= "TAG_Int(UNTAG_Int(@@@)-1)"
432 else if n
== once
"to_f".to_symbol
then
433 s
= "BOX_Float((float)UNTAG_Int(@@@))"
434 else if n
== once
"+".to_symbol
then
435 s
= "TAG_Int(UNTAG_Int(@@@)+UNTAG_Int(@@@))"
436 else if n
== once
"-".to_symbol
then
437 s
= "TAG_Int(UNTAG_Int(@@@)-UNTAG_Int(@@@))"
438 else if n
== once
"*".to_symbol
then
439 s
= "TAG_Int(UNTAG_Int(@@@)*UNTAG_Int(@@@))"
440 else if n
== once
"/".to_symbol
then
441 s
= "TAG_Int(UNTAG_Int(@@@)/UNTAG_Int(@@@))"
442 else if n
== once
"%".to_symbol
then
443 s
= "TAG_Int(UNTAG_Int(@@@)%UNTAG_Int(@@@))"
444 else if n
== once
"<".to_symbol
then
445 s
= "TAG_Bool(UNTAG_Int(@@@)<UNTAG_Int(@@@))"
446 else if n
== once
">".to_symbol
then
447 s
= "TAG_Bool(UNTAG_Int(@@@)>UNTAG_Int(@@@))"
448 else if n
== once
"<=".to_symbol
then
449 s
= "TAG_Bool(UNTAG_Int(@@@)<=UNTAG_Int(@@@))"
450 else if n
== once
">=".to_symbol
then
451 s
= "TAG_Bool(UNTAG_Int(@@@)>=UNTAG_Int(@@@))"
452 else if n
== once
"lshift".to_symbol
then
453 s
= "TAG_Int(UNTAG_Int(@@@)<<UNTAG_Int(@@@))"
454 else if n
== once
"rshift".to_symbol
then
455 s
= "TAG_Int(UNTAG_Int(@@@)>>UNTAG_Int(@@@))"
456 else if n
== once
"==".to_symbol
then
457 s
= "TAG_Bool((@@@)==(@@@))"
458 else if n
== once
"!=".to_symbol
then
459 s
= "TAG_Bool((@@@)!=(@@@))"
461 else if c
== once
"Float".to_symbol
then
462 if n
== once
"object_id".to_symbol
then
463 s
= "TAG_Int((bigint)UNBOX_Float(@@@))"
464 else if n
== once
"unary -".to_symbol
then
465 s
= "BOX_Float(-UNBOX_Float(@@@))"
466 else if n
== once
"output".to_symbol
then
467 s
= "printf(\"%f\\n\
", UNBOX_Float(@@@));"
468 else if n
== once
"to_i".to_symbol
then
469 s
= "TAG_Int((bigint)UNBOX_Float(@@@))"
470 else if n
== once
"+".to_symbol
then
471 s
= "BOX_Float(UNBOX_Float(@@@)+UNBOX_Float(@@@))"
472 else if n
== once
"-".to_symbol
then
473 s
= "BOX_Float(UNBOX_Float(@@@)-UNBOX_Float(@@@))"
474 else if n
== once
"*".to_symbol
then
475 s
= "BOX_Float(UNBOX_Float(@@@)*UNBOX_Float(@@@))"
476 else if n
== once
"/".to_symbol
then
477 s
= "BOX_Float(UNBOX_Float(@@@)/UNBOX_Float(@@@))"
478 else if n
== once
"<".to_symbol
then
479 s
= "TAG_Bool(UNBOX_Float(@@@)<UNBOX_Float(@@@))"
480 else if n
== once
">".to_symbol
then
481 s
= "TAG_Bool(UNBOX_Float(@@@)>UNBOX_Float(@@@))"
482 else if n
== once
"<=".to_symbol
then
483 s
= "TAG_Bool(UNBOX_Float(@@@)<=UNBOX_Float(@@@))"
484 else if n
== once
">=".to_symbol
then
485 s
= "TAG_Bool(UNBOX_Float(@@@)>=UNBOX_Float(@@@))"
487 else if c
== once
"Char".to_symbol
then
488 if n
== once
"object_id".to_symbol
then
489 s
= "TAG_Int(UNTAG_Char(@@@))"
490 else if n
== once
"unary -".to_symbol
then
491 s
= "TAG_Char(-UNTAG_Char(@@@))"
492 else if n
== once
"output".to_symbol
then
493 s
= "printf(\"%c\
", (unsigned char)UNTAG_Char(@@@));"
494 else if n
== once
"ascii".to_symbol
then
495 s
= "TAG_Int((unsigned char)UNTAG_Char(@@@))"
496 else if n
== once
"succ".to_symbol
then
497 s
= "TAG_Char(UNTAG_Char(@@@)+1)"
498 else if n
== once
"prec".to_symbol
then
499 s
= "TAG_Char(UNTAG_Char(@@@)-1)"
500 else if n
== once
"to_i".to_symbol
then
501 s
= "TAG_Int(UNTAG_Char(@@@)-'0')"
502 else if n
== once
"+".to_symbol
then
503 s
= "TAG_Char(UNTAG_Char(@@@)+UNTAG_Char(@@@))"
504 else if n
== once
"-".to_symbol
then
505 s
= "TAG_Char(UNTAG_Char(@@@)-UNTAG_Char(@@@))"
506 else if n
== once
"*".to_symbol
then
507 s
= "TAG_Char(UNTAG_Char(@@@)*UNTAG_Char(@@@))"
508 else if n
== once
"/".to_symbol
then
509 s
= "TAG_Char(UNTAG_Char(@@@)/UNTAG_Char(@@@))"
510 else if n
== once
"%".to_symbol
then
511 s
= "TAG_Char(UNTAG_Char(@@@)%UNTAG_Char(@@@))"
512 else if n
== once
"<".to_symbol
then
513 s
= "TAG_Bool(UNTAG_Char(@@@)<UNTAG_Char(@@@))"
514 else if n
== once
">".to_symbol
then
515 s
= "TAG_Bool(UNTAG_Char(@@@)>UNTAG_Char(@@@))"
516 else if n
== once
"<=".to_symbol
then
517 s
= "TAG_Bool(UNTAG_Char(@@@)<=UNTAG_Char(@@@))"
518 else if n
== once
">=".to_symbol
then
519 s
= "TAG_Bool(UNTAG_Char(@@@)>=UNTAG_Char(@@@))"
520 else if n
== once
"==".to_symbol
then
521 s
= "TAG_Bool((@@@)==(@@@))"
522 else if n
== once
"!=".to_symbol
then
523 s
= "TAG_Bool((@@@)!=(@@@))"
525 else if c
== once
"Bool".to_symbol
then
526 if n
== once
"object_id".to_symbol
then
527 s
= "TAG_Int(UNTAG_Bool(@@@))"
528 else if n
== once
"unary -".to_symbol
then
529 s
= "TAG_Bool(-UNTAG_Bool(@@@))"
530 else if n
== once
"output".to_symbol
then
531 s
= "(void)printf(UNTAG_Bool(@@@)?\"true\\n\
":\"false\\n\
");"
532 else if n
== once
"ascii".to_symbol
then
533 s
= "TAG_Bool(UNTAG_Bool(@@@))"
534 else if n
== once
"to_i".to_symbol
then
535 s
= "TAG_Int(UNTAG_Bool(@@@))"
536 else if n
== once
"==".to_symbol
then
537 s
= "TAG_Bool((@@@)==(@@@))"
538 else if n
== once
"!=".to_symbol
then
539 s
= "TAG_Bool((@@@)!=(@@@))"
541 else if c
== once
"NativeArray".to_symbol
then
542 if n
== once
"object_id".to_symbol
then
543 s
= "TAG_Int(UNBOX_NativeArray(@@@))"
544 else if n
== once
"[]".to_symbol
then
545 s
= "UNBOX_NativeArray(@@@)[UNTAG_Int(@@@)]"
546 else if n
== once
"[]=".to_symbol
then
547 s
= "UNBOX_NativeArray(@@@)[UNTAG_Int(@@@)]=@@@;"
548 else if n
== once
"copy_to".to_symbol
then
552 s
= "(void)memcpy(UNBOX_NativeArray(@@@), UNBOX_NativeArray(@@@), UNTAG_Int(@@@)*sizeof(val_t));"
554 else if c
== once
"NativeString".to_symbol
then
555 if n
== once
"object_id".to_symbol
then
556 s
= "TAG_Int(UNBOX_NativeString(@@@))"
557 else if n
== once
"atoi".to_symbol
then
558 s
= "TAG_Int(atoi(UNBOX_NativeString(@@@)))"
559 else if n
== once
"[]".to_symbol
then
560 s
= "TAG_Char(UNBOX_NativeString(@@@)[UNTAG_Int(@@@)])"
561 else if n
== once
"[]=".to_symbol
then
562 s
= "UNBOX_NativeString(@@@)[UNTAG_Int(@@@)]=UNTAG_Char(@@@);"
563 else if n
== once
"copy_to".to_symbol
then
569 s
= "(void)memcpy(UNBOX_NativeString(@@@)+UNTAG_Int(@@@), UNBOX_NativeString(@@@)+UNTAG_Int(@@@), UNTAG_Int(@@@));"
571 else if n
== once
"object_id".to_symbol
then
572 s
= "TAG_Int((bigint)@@@)"
573 else if n
== once
"sys".to_symbol
then
575 else if n
== once
"is_same_type".to_symbol
then
576 s
= "TAG_Bool((VAL2VFT(@@@)==VAL2VFT(@@@)))"
577 else if n
== once
"exit".to_symbol
then
579 s
= "exit(UNTAG_Int(@@@));"
580 else if n
== once
"calloc_array".to_symbol
then
582 s
= "BOX_NativeArray((val_t*)malloc((UNTAG_Int(@@@) * sizeof(val_t))))"
583 else if n
== once
"calloc_string".to_symbol
then
585 s
= "BOX_NativeString((char*)malloc((UNTAG_Int(@@@) * sizeof(char))))"
588 v
.visitor
.error
(self, "Fatal error: unknown intern method {method.full_name}.")
591 var rtype
= method
.signature
.return_type
592 if rtype
!= null then
593 v
.add_return_value
(v
.expr
(new INative(s
, p
), rtype
))
595 v
.stmt
(new INative(s
, p
))
600 ###############################################################################
603 redef fun accept_icode_generation
(v
) do end
605 # Generate icode sequence in the current A2IContext
606 # This method should not be called direclty: use generate_expr and generate_stmt from A2IContext instead
607 protected fun generate_icode
(v
: A2IContext): nullable IRegister is abstract
610 redef class AVardeclExpr
611 redef fun generate_icode
(v
)
613 var reg
= v
.variable
(variable
)
616 v
.add_assignment
(reg
, v
.generate_expr
(ne
))
622 redef class ABlockExpr
623 redef fun generate_icode
(v
)
625 for ne
in n_expr
do v
.generate_stmt
(ne
)
631 redef fun generate_icode
(v
)
636 escapable
.break_seq
= seq
639 v
.generate_stmt
(n_block
)
646 redef class AReturnExpr
647 redef fun generate_icode
(v
)
651 v
.add_assignment
(v
.return_value
.as(not null), v
.generate_expr
(ne
))
653 v
.stmt
(new IEscape(v
.return_seq
.as(not null)))
658 redef class ABreakExpr
659 redef fun generate_icode
(v
)
663 v
.add_assignment
(escapable
.break_value
.as(not null), v
.generate_expr
(ne
))
665 v
.stmt
(new IEscape(escapable
.break_seq
.as(not null)))
670 redef class AContinueExpr
671 redef fun generate_icode
(v
)
675 v
.add_assignment
(escapable
.continue_value
.as(not null), v
.generate_expr
(ne
))
677 v
.stmt
(new IEscape(escapable
.continue_seq
.as(not null)))
682 redef class AAbortExpr
683 redef fun generate_icode
(v
)
685 v
.add_abort
("Aborted")
691 redef fun generate_icode
(v
)
693 var iif
= new IIf(v
.generate_expr
(n_expr
))
697 if n_then
!= null then
699 v
.generate_stmt
(n_then
)
702 if n_else
!= null then
704 v
.generate_stmt
(n_else
)
712 redef class AWhileExpr
713 redef fun generate_icode
(v
)
716 var iloop
= new ILoop
718 escapable
.break_seq
= iloop
722 var iif
= new IIf(v
.generate_expr
(n_expr
))
725 # Process inside (condition is true)
726 if n_block
!= null then
728 escapable
.continue_seq
= iif
.then_seq
729 v
.generate_stmt
(n_block
)
732 # Process escape (condition is false)
734 v
.stmt
(new IEscape(iloop
))
741 redef class ALoopExpr
742 redef fun generate_icode
(v
)
745 var iloop
= new ILoop
747 escapable
.break_seq
= iloop
751 if n_block
!= null then
755 escapable
.continue_seq
= seq
756 v
.generate_stmt
(n_block
)
765 redef fun generate_icode
(v
)
767 var expr_type
= n_expr
.stype
770 var meth_iterator
= v
.visitor
.get_method
(expr_type
, once
"iterator".to_symbol
)
772 var iter_type
= meth_iterator
.signature_for
(expr_type
).return_type
.as(not null)
773 var ireg_iter
= v
.expr
(new ICall(meth_iterator
, [v
.generate_expr
(n_expr
)]), iter_type
)
777 var iloop
= new ILoop
779 escapable
.break_seq
= iloop
782 # Condition evaluation
783 var meth_is_ok
= v
.visitor
.get_method
(iter_type
, once
("is_ok".to_symbol
))
784 var ireg_isok
= v
.expr
(new ICall(meth_is_ok
, [ireg_iter
]), v
.visitor
.type_bool
)
785 var iif
= new IIf(ireg_isok
)
787 # Process insite the loop (condition is true)
790 escapable
.continue_seq
= iif
.then_seq
792 # Automatic variable assignment
793 var meth_item
= v
.visitor
.get_method
(iter_type
, once
("item".to_symbol
))
794 var va_stype
= variable
.stype
.as(not null)
795 var ireg_item
= v
.expr
(new ICall(meth_item
, [ireg_iter
]), va_stype
)
796 var ireg_va
= v
.variable
(variable
)
797 v
.add_assignment
(ireg_va
, ireg_item
)
800 v
.generate_stmt
(n_block
)
802 # Exit contition (condition is false)
804 v
.stmt
(new IEscape(iloop
))
807 var meth_next
= v
.visitor
.get_method
(iter_type
, once
("next".to_symbol
))
809 v
.stmt
(new ICall(meth_next
, [ireg_iter
]))
816 redef class AAssertExpr
817 redef fun generate_icode
(v
)
819 var e
= v
.generate_expr
(n_expr
)
826 v
.add_abort
("Assert failed")
828 v
.add_abort
("Assert %s failed", id
.to_s
)
836 redef fun generate_icode
(v
)
838 return v
.variable
(variable
)
842 redef class AVarAssignExpr
843 redef fun generate_icode
(v
)
845 var e
= v
.generate_expr
(n_value
)
846 v
.add_assignment
(v
.variable
(variable
), e
)
851 redef class AVarReassignExpr
852 redef fun generate_icode
(v
)
854 var e1
= v
.variable
(variable
)
855 var e2
= v
.generate_expr
(n_value
)
856 var e3
= v
.expr
(new ICall(assign_method
, [e1
, e2
]), assign_method
.signature
.return_type
.as(not null))
857 v
.add_assignment
(e1
, e3
)
862 redef class ASelfExpr
863 redef fun generate_icode
(v
)
865 return v
.variable
(variable
)
869 redef class AIfexprExpr
870 redef fun generate_icode
(v
)
873 var iif
= new IIf(v
.generate_expr
(n_expr
))
878 var reg
= v
.new_register
(stype
)
882 v
.add_assignment
(reg
, v
.generate_expr
(n_then
))
886 v
.add_assignment
(reg
, v
.generate_expr
(n_else
))
894 redef fun generate_icode
(v
)
896 var e
= v
.generate_expr
(n_expr
)
897 var e2
= v
.generate_expr
(n_expr2
)
898 return v
.expr
(new IIs(e
, e2
), stype
)
903 redef fun generate_icode
(v
)
906 var reg
= v
.new_register
(stype
)
908 # Process left operand (in a if/then)
909 var iif
= new IIf(v
.generate_expr
(n_expr
))
913 v
.add_assignment
(reg
, v
.lit_true_reg
)
915 # Process right operand (in the else)
917 v
.add_assignment
(reg
, v
.generate_expr
(n_expr2
))
925 redef fun generate_icode
(v
)
928 var reg
= v
.new_register
(stype
)
930 # Process left operand (in a if/else)
931 var iif
= new IIf(v
.generate_expr
(n_expr
))
935 v
.add_assignment
(reg
, v
.lit_false_reg
)
937 # Process right operand (in the then)
939 v
.add_assignment
(reg
, v
.generate_expr
(n_expr2
))
947 redef fun generate_icode
(v
)
949 var e
= v
.generate_expr
(n_expr
)
950 return v
.expr
(new INot(e
), stype
)
955 redef fun generate_icode
(v
)
957 var e
= v
.generate_expr
(n_expr
)
958 return v
.expr
(new ITypeCheck(e
, n_type
.stype
), stype
)
962 redef class AAsCastExpr
963 redef fun generate_icode
(v
)
965 var e
= v
.generate_expr
(n_expr
)
966 v
.add_type_cast
(e
, stype
)
971 redef class AAsNotnullExpr
972 redef fun generate_icode
(v
)
974 var e
= v
.generate_expr
(n_expr
)
975 v
.add_type_cast
(e
, stype
)
980 redef class ATrueExpr
981 redef fun generate_icode
(v
)
983 return v
.lit_true_reg
987 redef class AFalseExpr
988 redef fun generate_icode
(v
)
990 return v
.lit_false_reg
995 redef fun generate_icode
(v
)
997 return v
.expr
(new INative("TAG_Int({n_number.text})", null), stype
)
1001 redef class AFloatExpr
1002 redef fun generate_icode
(v
)
1004 return v
.expr
(new INative("BOX_Float({n_float.text})", null), stype
)
1008 redef class ACharExpr
1009 redef fun generate_icode
(v
)
1011 return v
.expr
(new INative("TAG_Char({n_char.text})", null), stype
)
1015 redef class AStringFormExpr
1016 redef fun generate_icode
(v
)
1018 compute_string_infos
1020 var ionce
= new IOnce
1021 var reg
= v
.expr
(ionce
, stype
)
1023 var ns
= v
.expr
(new INative("BOX_NativeString(\"{_cstring}\
")", null), v
.visitor
.type_nativestring
)
1024 var ni
= v
.expr
(new INative("TAG_Int({_cstring_length})", null), v
.visitor
.type_int
)
1025 var prop
= v
.visitor
.get_method
(stype
, once
"with_native".to_symbol
)
1026 var e
= v
.expr
(new INew(stype
, prop
, [ns
, ni
]), stype
)
1027 v
.add_assignment
(reg
, e
)
1032 # The raw string value
1033 protected fun string_text
: String is abstract
1035 # The string in a C native format
1036 protected var _cstring
: nullable String
1038 # The string length in bytes
1039 protected var _cstring_length
: nullable Int
1041 # Compute _cstring and _cstring_length using string_text
1042 protected fun compute_string_infos
1045 var str
= string_text
1046 var res
= new Buffer
1048 while i
< str
.length
do
1053 if c2
!= '{' and c2 != '}' then
1063 _cstring_length
= len
1067 redef class AStringExpr
1068 redef fun string_text
do return n_string
.text
.substring
(1, n_string
.text
.length
- 2)
1070 redef class AStartStringExpr
1071 redef fun string_text
do return n_string
.text
.substring
(1, n_string
.text
.length
- 2)
1073 redef class AMidStringExpr
1074 redef fun string_text
do return n_string
.text
.substring
(1, n_string
.text
.length
- 2)
1076 redef class AEndStringExpr
1077 redef fun string_text
do return n_string
.text
.substring
(1, n_string
.text
.length
- 2)
1080 redef class ASuperstringExpr
1081 redef fun generate_icode
(v
)
1083 var array
= v
.add_new_array
(atype
, n_exprs
.length
)
1084 var prop_to_s
= v
.visitor
.get_method
(v
.visitor
.type_object
, once
"to_s".to_symbol
)
1085 for ne
in n_exprs
do
1086 var e
= v
.generate_expr
(ne
)
1087 if ne
.stype
!= stype
then
1088 e
= v
.expr
(new ICall(prop_to_s
, [e
]), stype
)
1090 v
.add_call_array_add
(array
, e
)
1092 return v
.expr
(new ICall(prop_to_s
, [array
]), stype
)
1096 redef class ANullExpr
1097 redef fun generate_icode
(v
)
1099 return v
.lit_null_reg
1103 redef class AArrayExpr
1104 redef fun generate_icode
(v
)
1106 var recv
= v
.add_new_array
(stype
, n_exprs
.length
)
1107 for ne
in n_exprs
do
1108 var e
= v
.generate_expr
(ne
)
1109 v
.add_call_array_add
(recv
, e
)
1115 redef class ACrangeExpr
1116 redef fun generate_icode
(v
)
1118 var e
= v
.generate_expr
(n_expr
)
1119 var e2
= v
.generate_expr
(n_expr2
)
1120 var prop
= v
.visitor
.get_method
(stype
, once
"init".to_symbol
)
1121 return v
.expr
(new INew(stype
, prop
, [e
, e2
]), stype
)
1125 redef class AOrangeExpr
1126 redef fun generate_icode
(v
)
1128 var e
= v
.generate_expr
(n_expr
)
1129 var e2
= v
.generate_expr
(n_expr2
)
1130 var prop
= v
.visitor
.get_method
(stype
, once
"without_last".to_symbol
)
1131 return v
.expr
(new INew(stype
, prop
, [e
, e2
]), stype
)
1135 redef class ASuperExpr
1136 redef fun generate_icode
(v
)
1138 var arity
= v
.iroutine
.params
.length
- 1
1139 if init_in_superclass
!= null then
1140 arity
= init_in_superclass
.signature
.arity
1142 var args
= new Array[IRegister].with_capacity
(arity
+ 1)
1143 args
.add
(v
.iroutine
.params
[0])
1144 if n_args
.length
!= arity
then
1145 for i
in [0..arity
[ do
1146 args
.add
(v
.iroutine
.params
[i
+ 1])
1150 args
.add
(v
.generate_expr
(na
))
1153 var p
= init_in_superclass
1155 var rtype
= p
.signature
.return_type
1156 if rtype
!= null then
1157 return v
.expr
(new ICall(p
, args
), rtype
)
1159 v
.stmt
(new ICall(p
, args
))
1164 var rtype
= p
.signature
.return_type
1165 if rtype
== null then
1166 v
.stmt
(new ISuper(p
, args
))
1169 return v
.expr
(new ISuper(p
, args
), rtype
)
1175 redef class AAttrExpr
1176 redef fun generate_icode
(v
)
1178 var e
= v
.generate_expr
(n_expr
)
1179 if n_expr
.stype
.is_nullable
then v
.add_null_reciever_check
(e
)
1180 return v
.add_attr_read
(prop
, e
)
1184 redef class AAttrAssignExpr
1185 redef fun generate_icode
(v
)
1187 var e
= v
.generate_expr
(n_expr
)
1188 if n_expr
.stype
.is_nullable
then v
.add_null_reciever_check
(e
)
1189 var e2
= v
.generate_expr
(n_value
)
1190 v
.stmt
(new IAttrWrite(prop
, e
, e2
))
1194 redef class AAttrReassignExpr
1195 redef fun generate_icode
(v
)
1197 var e1
= v
.generate_expr
(n_expr
)
1198 if n_expr
.stype
.is_nullable
then v
.add_null_reciever_check
(e1
)
1199 var e2
= v
.expr
(new IAttrRead(prop
, e1
), attr_type
)
1200 var e3
= v
.generate_expr
(n_value
)
1201 var e4
= v
.expr
(new ICall(assign_method
, [e2
, e3
]), attr_type
)
1202 v
.stmt
(new IAttrWrite(prop
, e1
, e4
))
1207 redef class AIssetAttrExpr
1208 redef fun generate_icode
(v
)
1210 var e
= v
.generate_expr
(n_expr
)
1211 if n_expr
.stype
.is_nullable
then v
.add_null_reciever_check
(e
)
1212 return v
.expr
(new IAttrIsset(prop
, e
), stype
)
1216 redef class AAbsAbsSendExpr
1217 # Compile each argument and add them to the array
1218 fun generate_icode_for_arguments_in
(v
: A2IContext, args
: Array[IRegister], signature
: MMSignature)
1220 var par_arity
= signature
.arity
1221 var par_vararg
= signature
.vararg_rank
1222 var raw_args
= raw_arguments
1223 var raw_arity
= raw_args
.length
1225 for par_idx
in [0..par_arity
[ do
1227 var par_type
= signature
[par_idx
]
1228 if par_idx
== par_vararg
then
1229 var arr
= v
.add_new_array
(v
.visitor
.type_array
(par_type
), raw_arity-par_arity
)
1230 for i
in [0..(raw_arity-par_arity
)] do
1231 a
= raw_args
[arg_idx
]
1232 v
.add_call_array_add
(arr
, v
.generate_expr
(a
))
1233 arg_idx
= arg_idx
+ 1
1237 a
= raw_args
[arg_idx
]
1238 args
.add
(v
.generate_expr
(a
))
1239 arg_idx
= arg_idx
+ 1
1245 redef class ASendExpr
1246 redef fun generate_icode
(v
)
1248 var recv
= v
.generate_expr
(n_expr
)
1249 var args
= new Array[IRegister]
1252 generate_icode_for_arguments_in
(v
, args
, prop
.signature
.as(not null))
1253 var r
: nullable IRegister = null # The full result of the send (raw call + breaks)
1254 var r2
: nullable IRegister # The raw result of the call
1258 var closcns
: nullable Array[nullable IClosureDef] = null
1259 if not prop_signature
.closures
.is_empty
then
1260 var rtype
= prop_signature
.return_type
1261 if rtype
!= null then
1262 r
= v
.new_register
(rtype
)
1267 closcns
= new Array[nullable IClosureDef]
1269 if closure_defs
!= null then cdarity
= closure_defs
.length
1270 var closure_defs
= closure_defs
1271 for mmc
in prop_signature
.closures
do
1274 if closure_defs
!= null then
1275 for cd
in closure_defs
do
1276 if cd
.n_id
.to_symbol
!= name
then continue
1277 assert found
== false
1279 cd
.escapable
.break_seq
= seq
1280 cd
.escapable
.break_value
= r
1281 var cn
= cd
.generate_iclosuredef
(v
)
1291 r2
= v
.add_call
(prop
, args
, closcns
)
1294 if not prop_signature
.closures
.is_empty
then
1295 if r
!= null and r2
!= null then v
.add_assignment
(r
, r2
)
1301 if prop
.global
.is_init
then
1302 v
.invoke_super_init_calls_after
(prop
)
1308 redef class ASendReassignExpr
1309 redef fun generate_icode
(v
)
1311 var recv
= v
.generate_expr
(n_expr
)
1312 if n_expr
.stype
.is_nullable
then v
.add_null_reciever_check
(recv
)
1313 var args
= new Array[IRegister]
1315 generate_icode_for_arguments_in
(v
, args
, read_prop
.signature
.as(not null))
1317 var e2
= v
.expr
(new ICall(read_prop
, args
), read_prop
.signature
.return_type
.as(not null))
1318 var e3
= v
.generate_expr
(n_value
)
1319 var e4
= v
.expr
(new ICall(assign_method
, [e2
, e3
]), assign_method
.signature
.return_type
.as(not null))
1320 var args2
= args
.to_a
1322 v
.stmt
(new ICall(prop
, args2
))
1327 redef class ANewExpr
1328 redef fun generate_icode
(v
)
1330 var args
= new Array[IRegister]
1331 generate_icode_for_arguments_in
(v
, args
, prop
.signature
.as(not null))
1332 return v
.expr
(new INew(stype
, prop
, args
), stype
)
1336 redef class AProxyExpr
1337 redef fun generate_icode
(v
)
1339 return v
.generate_expr
(n_expr
)
1343 redef class AOnceExpr
1344 redef fun generate_icode
(v
)
1346 var ionce
= new IOnce
1347 var reg
= v
.expr
(ionce
, stype
)
1351 var e
= v
.generate_expr
(n_expr
)
1352 v
.add_assignment
(reg
, e
)
1360 redef class AClosureDef
1361 var _iclosure_def
: nullable IClosureDef
1363 fun generate_iclosuredef
(v
: A2IContext): IClosureDef
1366 var args
= new Array[IRegister]
1367 var sig
= closure
.signature
1368 for i
in [0..sig
.arity
[ do
1369 args
.add
(v
.new_register
(sig
[i
]))
1371 var ret
: nullable IRegister = null
1372 var rtype
= sig
.return_type
1373 if rtype
!= null then
1374 ret
= v
.new_register
(rtype
)
1377 var iclos
= new IClosureDef(args
, ret
)
1378 iclos
.location
= location
1383 escapable
.continue_seq
= iclos
.body
1384 escapable
.continue_value
= iclos
.result
1387 for i
in [0..variables
.length
[ do
1388 var res
= v
.variable
(variables
[i
])
1389 v
.add_assignment
(res
, iclos
.params
[i
])
1392 v
.generate_stmt
(n_expr
)
1395 _iclosure_def
= iclos
1400 redef class AClosureCallExpr
1401 redef fun generate_icode
(v
)
1404 var args
= new Array[IRegister]
1405 generate_icode_for_arguments_in
(v
, args
, variable
.closure
.signature
)
1408 var closdecl
= v
.closurevariables
[variable
]
1409 var icall
= new IClosCall(closdecl
, args
)
1412 # Fill break of ical
1413 if n_closure_defs
.length
== 1 then do
1415 icall
.break_seq
= iseq
1417 v
.generate_stmt
(n_closure_defs
.first
.n_expr
)
1421 # Prepare in case of default block
1422 var iif
: nullable IIf = null # The iif of default block
1423 var closdecl_default
= closdecl
.default
# The default (if any)
1424 if closdecl_default
!= null then
1425 iif
= new IIf(v
.expr
(new IHasClos(closdecl
), v
.visitor
.type_bool
))
1427 v
.seq
= iif
.then_seq
1431 var r2
: nullable IRegister = null # the result of the icall
1432 var rtype
= variable
.closure
.signature
.return_type
1433 if rtype
== null then
1436 r2
= v
.expr
(icall
, rtype
)
1439 # Process the case of default block
1440 var r
: nullable IRegister = null # the real result
1441 if closdecl_default
!= null then
1444 assert rtype
!= null
1445 r
= v
.new_register
(rtype
)
1446 v
.add_assignment
(r
, r2
)
1448 v
.seq
= iif
.else_seq
1449 var r3
= closdecl_default
.inline_in_seq
(iif
.else_seq
, args
)
1452 v
.add_assignment
(r
, r3
)