2 /**-------------------------------------------------------------------**
4 **-------------------------------------------------------------------**
6 **-------------------------------------------------------------------**
7 ** First version: october 25th 2001 **
8 **-------------------------------------------------------------------**/
11 /******************************************************************************
12 * CLooG : the Chunky Loop Generator (experimental) *
13 ******************************************************************************
15 * Copyright (C) 2001-2005 Cedric Bastoul *
17 * This library is free software; you can redistribute it and/or *
18 * modify it under the terms of the GNU Lesser General Public *
19 * License as published by the Free Software Foundation; either *
20 * version 2.1 of the License, or (at your option) any later version. *
22 * This library is distributed in the hope that it will be useful, *
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
25 * Lesser General Public License for more details. *
27 * You should have received a copy of the GNU Lesser General Public *
28 * License along with this library; if not, write to the Free Software *
29 * Foundation, Inc., 51 Franklin Street, Fifth Floor, *
30 * Boston, MA 02110-1301 USA *
32 * CLooG, the Chunky Loop Generator *
33 * Written by Cedric Bastoul, Cedric.Bastoul@inria.fr *
35 ******************************************************************************/
36 /* CAUTION: the english used for comments is probably the worst you ever read,
37 * please feel free to correct and improve it !
41 # include <sys/types.h>
42 # include <sys/time.h>
49 # include "../include/cloog/cloog.h"
51 # include <sys/resource.h>
55 /******************************************************************************
56 * Structure display function *
57 ******************************************************************************/
61 * cloog_program_print function:
62 * this function is a human-friendly way to display the CloogProgram data
63 * structure, it shows all the different fields and includes an indentation
64 * level (level) in order to work with others print_structure functions.
65 * - July 1st 2005: first version based on the old cloog_program_print function.
67 void cloog_program_print_structure(file
, program
, level
)
69 CloogProgram
* program
;
73 /* Go to the right level. */
74 for (i
=0; i
<level
; i
++)
77 fprintf(file
,"+-- CloogProgram\n") ;
80 for (i
=0; i
<=level
+1; i
++)
84 /* Print the language. */
85 for (i
=0; i
<=level
; i
++)
87 fprintf(file
, "Language: %c\n",program
->language
) ;
90 for (i
=0; i
<=level
+1; i
++)
94 /* Print the scattering dimension number. */
95 for (i
=0; i
<=level
; i
++)
97 fprintf(file
,"Scattering dimension number: %d\n",program
->nb_scattdims
) ;
100 for (i
=0; i
<=level
+1; i
++)
101 fprintf(file
,"|\t") ;
104 /* Print the scalar scattering dimension informations. */
105 for (i
=0; i
<=level
; i
++)
106 fprintf(file
,"|\t") ;
107 if (program
->scaldims
!= NULL
)
108 { fprintf(file
,"Scalar dimensions:") ;
109 for (i
=0;i
<program
->nb_scattdims
;i
++)
110 fprintf(file
," %d:%d ",i
,program
->scaldims
[i
]) ;
114 fprintf(file
,"No scalar scattering dimensions\n") ;
117 for (i
=0; i
<=level
+1; i
++)
118 fprintf(file
,"|\t") ;
121 /* Print the parameter and the iterator names. */
122 cloog_names_print_structure(file
,program
->names
,level
+1) ;
125 for (i
=0; i
<=level
+1; i
++)
126 fprintf(file
,"|\t") ;
129 /* Print the context. */
130 cloog_domain_print_structure(file
, program
->context
, level
+1, "Context");
132 /* Print the loop. */
133 cloog_loop_print_structure(file
,program
->loop
,level
+1) ;
135 /* One more time something that is here only for a better look. */
137 { for (i
=0; i
<=level
; i
++)
138 fprintf(file
,"|\t") ;
146 * cloog_program_dump_cloog function:
147 * This function dumps a CloogProgram structure supposed to be completely
148 * filled in a CLooG input file (foo possibly stdout) such as CLooG can
149 * rebuild almost exactly the data structure from the input file.
151 * If the scattering is already applied, the scattering parameter is supposed to
152 * be NULL. In this case the number of scattering functions is lost, since they
153 * are included inside the iteration domains. This can only lead to a less
154 * beautiful pretty printing.
156 * In case the scattering is not yet applied it can be passed to this function
157 * and will be included in the CLooG input file dump.
159 void cloog_program_dump_cloog(FILE * foo
, CloogProgram
* program
,
160 CloogScatteringList
*scattering
)
164 CloogScatteringList
*tmp_scatt
;
168 "# This is an automatic dump of a CLooG input file from a CloogProgram data\n"
169 "# structure. WARNING: it is highly dangerous and MAY be correct ONLY if\n"
170 "# - it has been dumped before loop generation.\n"
171 "# - option -noscalars is used (it removes scalar dimensions otherwise)\n"
172 "# - option -l is at least the original scattering dimension number\n"
173 "# ASK THE AUTHOR IF YOU *NEED* SOMETHING MORE ROBUST\n") ;
176 if (program
->language
== 'c')
177 fprintf(foo
,"# Language: C\n") ;
179 fprintf(foo
,"# Language: FORTRAN\n") ;
180 fprintf(foo
,"%c\n\n",program
->language
) ;
183 fprintf(foo
, "# Context (%d parameter(s)):\n", program
->names
->nb_parameters
);
184 cloog_domain_print_constraints(foo
, program
->context
, 0);
185 fprintf(foo
,"1 # Parameter name(s)\n") ;
186 for (i
=0;i
<program
->names
->nb_parameters
;i
++)
187 fprintf(foo
,"%s ",program
->names
->parameters
[i
]) ;
189 /* Statement number. */
191 loop
= program
->loop
;
196 fprintf(foo
,"\n\n# Statement number:\n%d\n\n",i
) ;
198 /* Iteration domains. */
200 loop
= program
->loop
;
202 { /* Name of the domain. */
203 fprintf(foo
,"# Iteration domain of statement %d.\n",i
) ;
205 cloog_domain_print_constraints(foo
, loop
->domain
, 1);
206 fprintf(foo
,"0 0 0 # For future options.\n\n") ;
211 fprintf(foo
,"\n1 # Iterator name(s)\n") ;
213 /* Scattering already applied? In this case print the scattering names as
214 * additional iterator names. */
216 for (i
= 0; i
< program
->names
->nb_scattering
; i
++)
217 fprintf(foo
, "%s ", program
->names
->scattering
[i
]);
218 for (i
=0;i
<program
->names
->nb_iterators
;i
++)
219 fprintf(foo
,"%s ",program
->names
->iterators
[i
]);
220 fprintf(foo
,"\n\n") ;
222 /* Exit, if scattering is already applied. */
224 fprintf(foo
, "# No scattering functions.\n0\n\n");
228 /* Scattering relations. */
229 fprintf(foo
, "# --------------------- SCATTERING --------------------\n");
232 for (tmp_scatt
= scattering
; tmp_scatt
; tmp_scatt
= tmp_scatt
->next
)
235 fprintf(foo
, "%d # Scattering functions", i
);
237 for (tmp_scatt
= scattering
; tmp_scatt
; tmp_scatt
= tmp_scatt
->next
)
238 cloog_scattering_print_constraints(foo
, tmp_scatt
->scatt
, 1);
240 fprintf(foo
, "\n1 # Scattering dimension name(s)\n");
242 for (i
= 0; i
< program
->names
->nb_scattering
; i
++)
243 fprintf(foo
, "%s ", program
->names
->scattering
[i
]);
248 * cloog_program_print function:
249 * This function prints the content of a CloogProgram structure (program) into a
250 * file (file, possibly stdout).
251 * - July 1st 2005: Now this very old function (probably as old as CLooG) is
252 * only a frontend to cloog_program_print_structure, with a
253 * quite better human-readable representation.
255 void cloog_program_print(FILE * file
, CloogProgram
* program
)
256 { cloog_program_print_structure(file
,program
,0) ;
260 static void print_comment(FILE *file
, CloogOptions
*options
,
261 const char *fmt
, ...)
266 if (options
->language
== LANGUAGE_FORTRAN
) {
268 vfprintf(file
, fmt
, args
);
271 fprintf(file
, "/* ");
272 vfprintf(file
, fmt
, args
);
273 fprintf(file
, " */\n");
277 static void print_macros(FILE *file
)
279 fprintf(file
, "/* Useful macros. */\n") ;
281 "#define floord(n,d) (((n)<0) ? -((-(n)+(d)-1)/(d)) : (n)/(d))\n");
283 "#define ceild(n,d) (((n)<0) ? -((-(n))/(d)) : ((n)+(d)-1)/(d))\n");
284 fprintf(file
, "#define max(x,y) ((x) > (y) ? (x) : (y))\n") ;
285 fprintf(file
, "#define min(x,y) ((x) < (y) ? (x) : (y))\n\n") ;
288 static void print_declarations(FILE *file
, int n
, char **names
)
292 fprintf(file
, " int %s", names
[0]);
293 for (i
= 1; i
< n
; i
++)
294 fprintf(file
, ", %s", names
[i
]);
296 fprintf(file
, ";\n");
299 static void print_iterator_declarations(FILE *file
, CloogProgram
*program
,
300 CloogOptions
*options
)
302 CloogNames
*names
= program
->names
;
304 if (names
->nb_scattering
) {
305 fprintf(file
, " /* Scattering iterators. */\n");
306 print_declarations(file
, names
->nb_scattering
, names
->scattering
);
308 if (names
->nb_iterators
) {
309 fprintf(file
, " /* Original iterators. */\n");
310 print_declarations(file
, names
->nb_iterators
, names
->iterators
);
314 static void print_callable_preamble(FILE *file
, CloogProgram
*program
,
315 CloogOptions
*options
)
318 CloogBlockList
*blocklist
;
320 CloogStatement
*statement
;
322 fprintf(file
, "extern void hash(int);\n\n");
326 for (blocklist
= program
->blocklist
; blocklist
; blocklist
= blocklist
->next
) {
327 block
= blocklist
->block
;
328 for (statement
= block
->statement
; statement
; statement
= statement
->next
) {
329 fprintf(file
, "#define S%d(", statement
->number
);
330 if (block
->depth
> 0) {
331 fprintf(file
, "%s", program
->names
->iterators
[0]);
332 for(j
= 1; j
< block
->depth
; j
++)
333 fprintf(file
, ",%s", program
->names
->iterators
[j
]);
335 fprintf(file
,") { hash(%d);", statement
->number
);
336 for(j
= 0; j
< block
->depth
; j
++)
337 fprintf(file
, " hash(%s);", program
->names
->iterators
[j
]);
338 fprintf(file
, " }\n");
341 fprintf(file
, "\nvoid test(");
342 if (program
->names
->nb_parameters
> 0) {
343 fprintf(file
, "int %s", program
->names
->parameters
[0]);
344 for(j
= 1; j
< program
->names
->nb_parameters
; j
++)
345 fprintf(file
, ", int %s", program
->names
->parameters
[j
]);
347 fprintf(file
, ")\n{\n");
348 print_iterator_declarations(file
, program
, options
);
351 static void print_callable_postamble(FILE *file
, CloogProgram
*program
)
353 fprintf(file
, "}\n");
357 * cloog_program_pprint function:
358 * This function prints the content of a CloogProgram structure (program) into a
359 * file (file, possibly stdout), in a C-like language.
360 * - June 22nd 2005: Adaptation for GMP.
362 void cloog_program_pprint(file
, program
, options
)
364 CloogProgram
* program
;
365 CloogOptions
* options
;
366 { int i
, j
, nb_scattering
, indentation
=0 ;
367 CloogStatement
* statement
;
368 CloogBlockList
* blocklist
;
370 struct clast_stmt
*root
;
372 if (program
->language
== 'f')
373 options
->language
= LANGUAGE_FORTRAN
;
375 options
->language
= LANGUAGE_C
;
378 print_comment(file
, options
, "Generated from %s by %s in %.2fs.",
379 options
->name
, cloog_version(), options
->time
);
381 print_comment(file
, options
, "Generated from %s by %s.",
382 options
->name
, cloog_version());
385 print_comment(file
, options
, "CLooG asked for %d KBytes.", options
->memory
);
386 cloog_msg(CLOOG_INFO
, "%.2fs and %dKB used for code generation.\n",
387 options
->time
,options
->memory
);
390 /* If the option "compilable" is set, we provide the whole stuff to generate
391 * a compilable code. This code just do nothing, but now the user can edit
392 * the source and set the statement macros and parameters values.
394 nb_scattering
= program
->nb_scattdims
;
395 if (options
->compilable
&& (program
->language
== 'c'))
397 fprintf(file
,"/* DON'T FORGET TO USE -lm OPTION TO COMPILE. */\n\n") ;
398 fprintf(file
,"/* Useful headers. */\n") ;
399 fprintf(file
,"#include <stdio.h>\n") ;
400 fprintf(file
,"#include <stdlib.h>\n") ;
401 fprintf(file
,"#include <math.h>\n\n") ;
403 /* The value of parameters. */
404 fprintf(file
,"/* Parameter value. */\n") ;
405 for (i
= 1; i
<= program
->names
->nb_parameters
; i
++)
406 fprintf(file
, "#define PARVAL%d %d\n", i
, options
->compilable
);
411 /* The statement macros. */
412 fprintf(file
,"/* Statement macros (please set). */\n") ;
413 blocklist
= program
->blocklist
;
414 while (blocklist
!= NULL
)
415 { block
= blocklist
->block
;
416 statement
= block
->statement
;
417 while (statement
!= NULL
)
418 { fprintf(file
,"#define S%d(",statement
->number
) ;
419 if (block
->depth
> 0)
420 { fprintf(file
,"%s",program
->names
->iterators
[0]) ;
421 for(j
=1;j
<block
->depth
;j
++)
422 fprintf(file
,",%s",program
->names
->iterators
[j
]) ;
424 fprintf(file
,") {total++;") ;
425 if (block
->depth
> 0) {
426 fprintf(file
, " printf(\"S%d %%d", statement
->number
);
427 for(j
=1;j
<block
->depth
;j
++)
428 fprintf(file
, " %%d");
430 fprintf(file
,"\\n\",%s",program
->names
->iterators
[0]) ;
431 for(j
=1;j
<block
->depth
;j
++)
432 fprintf(file
,",%s",program
->names
->iterators
[j
]) ;
435 fprintf(file
,"}\n") ;
437 statement
= statement
->next
;
439 blocklist
= blocklist
->next
;
442 /* The iterator and parameter declaration. */
443 fprintf(file
,"\nint main() {\n") ;
444 print_iterator_declarations(file
, program
, options
);
445 if (program
->names
->nb_parameters
> 0)
446 { fprintf(file
," /* Parameters. */\n") ;
447 fprintf(file
, " int %s=PARVAL1",program
->names
->parameters
[0]);
448 for(i
=2;i
<=program
->names
->nb_parameters
;i
++)
449 fprintf(file
, ", %s=PARVAL%d", program
->names
->parameters
[i
-1], i
);
453 fprintf(file
," int total=0;\n");
456 /* And we adapt the identation. */
458 } else if (options
->callable
&& program
->language
== 'c') {
459 print_callable_preamble(file
, program
, options
);
463 root
= cloog_clast_create(program
, options
);
464 clast_pprint(file
, root
, indentation
, options
);
465 cloog_clast_free(root
);
467 /* The end of the compilable code in case of 'compilable' option. */
468 if (options
->compilable
&& (program
->language
== 'c'))
470 fprintf(file
, "\n printf(\"Number of integral points: %%d.\\n\",total);");
471 fprintf(file
, "\n return 0;\n}\n");
472 } else if (options
->callable
&& program
->language
== 'c')
473 print_callable_postamble(file
, program
);
477 /******************************************************************************
478 * Memory deallocation function *
479 ******************************************************************************/
483 * cloog_program_free function:
484 * This function frees the allocated memory for a CloogProgram structure.
486 void cloog_program_free(CloogProgram
* program
)
487 { cloog_names_free(program
->names
) ;
488 cloog_loop_free(program
->loop
) ;
489 cloog_domain_free(program
->context
) ;
490 cloog_block_list_free(program
->blocklist
) ;
491 if (program
->scaldims
!= NULL
)
492 free(program
->scaldims
) ;
498 /******************************************************************************
500 ******************************************************************************/
504 * cloog_scattering_list_read
505 * Read in a list of scattering functions for the nb_statements
508 static CloogScatteringList
*cloog_scattering_list_read(FILE * foo
,
509 CloogLoop
*loop
, int nb_statements
, int nb_parameters
)
513 CloogScatteringList
*list
= NULL
, **next
= &list
;
515 /* We read first the number of scattering functions in the list. */
517 if (!fgets(s
, MAX_STRING
, foo
))
519 } while ((*s
=='#' || *s
=='\n') || (sscanf(s
, " %d", &nb_scat
) < 1));
524 if (nb_scat
> nb_statements
)
525 cloog_die("too many scattering functions.\n");
528 *next
= (CloogScatteringList
*)malloc(sizeof(CloogScatteringList
));
529 (*next
)->scatt
= cloog_domain_read_scattering(loop
->domain
, foo
);
530 (*next
)->next
= NULL
;
532 next
= &(*next
)->next
;
539 static void cloog_program_construct_block_list(CloogProgram
*p
)
542 CloogBlockList
**next
= &p
->blocklist
;
544 for (loop
= p
->loop
; loop
; loop
= loop
->next
) {
545 *next
= cloog_block_list_alloc(loop
->block
);
546 next
= &(*next
)->next
;
552 * cloog_program_read function:
553 * This function read the informations to put in a CloogProgram structure from
554 * a file (file, possibly stdin). It returns a pointer to a CloogProgram
555 * structure containing the read informations.
556 * - October 25th 2001: first version.
557 * - September 9th 2002: - the big reading function is now split in several
558 * functions (one per read data structure).
559 * - adaptation to the new file format with naming.
561 CloogProgram
* cloog_program_read(FILE * file
, CloogOptions
* options
)
563 int i
, nb_statements
;
564 char s
[MAX_STRING
], language
, prefix
[2]={'c','\0'};
565 CloogLoop
* current
, * next
;
566 CloogScatteringList
* scatteringl
;
570 /* Memory allocation for the CloogProgram structure. */
571 p
= cloog_program_malloc() ;
573 /* First of all, we read the language to use. */
574 while (fgets(s
,MAX_STRING
,file
) == 0) ;
575 while ((*s
=='#'||*s
=='\n') || (sscanf(s
," %c",&language
)<1))
576 fgets(s
,MAX_STRING
,file
) ;
577 p
->language
= language
;
579 p
->names
= n
= cloog_names_alloc();
581 /* We then read the context data. */
582 p
->context
= cloog_domain_read_context(options
->state
, file
);
583 n
->nb_parameters
= cloog_domain_parameter_dimension(p
->context
);
585 /* First part of the CloogNames structure: reading of the parameter names. */
586 n
->parameters
= cloog_names_read_strings(file
, n
->nb_parameters
,
587 NULL
, FIRST_PARAMETER
);
589 /* We read the statement number. */
590 while (fgets(s
,MAX_STRING
,file
) == 0) ;
591 while ((*s
=='#'||*s
=='\n') || (sscanf(s
," %d",&nb_statements
)<1))
592 fgets(s
,MAX_STRING
,file
) ;
594 /* Statements and domains reading for each statement. */
595 if (nb_statements
> 0)
596 { /* Reading of the first domain. */
597 p
->loop
= cloog_loop_read(options
->state
, file
, 0, n
->nb_parameters
);
599 if (p
->loop
->domain
!= NULL
)
600 n
->nb_iterators
= cloog_domain_dimension(p
->loop
->domain
);
604 /* And the same for each next domain. */
606 for (i
=2;i
<=nb_statements
;i
++) {
607 next
= cloog_loop_read(options
->state
, file
, i
-1, n
->nb_parameters
);
608 if (next
->domain
!= NULL
&&
609 cloog_domain_dimension(next
->domain
) > n
->nb_iterators
)
610 n
->nb_iterators
= cloog_domain_dimension(next
->domain
);
612 current
->next
= next
;
613 current
= current
->next
;
616 /* Reading of the iterator names. */
617 n
->iterators
= cloog_names_read_strings(file
, n
->nb_iterators
,
618 NULL
, FIRST_ITERATOR
);
620 /* Reading and putting the scattering data in program structure. */
621 scatteringl
= cloog_scattering_list_read(file
, p
->loop
, nb_statements
,
624 if (scatteringl
!= NULL
)
625 { if (cloog_scattering_list_lazy_same(scatteringl
))
626 cloog_msg(options
, CLOOG_WARNING
,
627 "some scattering functions are similar.\n");
629 p
->nb_scattdims
= cloog_scattering_dimension(scatteringl
->scatt
,
631 n
->nb_scattering
= p
->nb_scattdims
;
632 n
->scattering
= cloog_names_read_strings(file
, p
->nb_scattdims
, prefix
, -1);
634 /* The boolean array for scalar dimensions is created and set to 0. */
635 p
->scaldims
= (int *)malloc(p
->nb_scattdims
*(sizeof(int))) ;
636 if (p
->scaldims
== NULL
)
637 cloog_die("memory overflow.\n");
638 for (i
=0;i
<p
->nb_scattdims
;i
++)
641 /* We try to find blocks in the input problem to reduce complexity. */
642 if (!options
->noblocks
)
643 cloog_program_block(p
, scatteringl
, options
);
644 if (!options
->noscalars
)
645 cloog_program_extract_scalars(p
, scatteringl
, options
);
647 cloog_program_scatter(p
, scatteringl
, options
);
648 cloog_scattering_list_free(scatteringl
);
650 if (!options
->noblocks
)
651 p
->loop
= cloog_loop_block(p
->loop
, p
->scaldims
, p
->nb_scattdims
);
654 { p
->nb_scattdims
= 0 ;
658 cloog_names_scalarize(p
->names
,p
->nb_scattdims
,p
->scaldims
) ;
660 cloog_program_construct_block_list(p
);
664 p
->blocklist
= NULL
;
672 /******************************************************************************
673 * Processing functions *
674 ******************************************************************************/
678 * cloog_program_malloc function:
679 * This function allocates the memory space for a CloogProgram structure and
680 * sets its fields with default values. Then it returns a pointer to the
682 * - November 21th 2005: first version.
684 CloogProgram
* cloog_program_malloc()
685 { CloogProgram
* program
;
687 /* Memory allocation for the CloogProgram structure. */
688 program
= (CloogProgram
*)malloc(sizeof(CloogProgram
)) ;
690 cloog_die("memory overflow.\n");
692 /* We set the various fields with default values. */
693 program
->language
= 'c' ;
694 program
->nb_scattdims
= 0 ;
695 program
->context
= NULL
;
696 program
->loop
= NULL
;
697 program
->names
= NULL
;
698 program
->blocklist
= NULL
;
699 program
->scaldims
= NULL
;
707 * cloog_program_generate function:
708 * This function calls the Quillere algorithm for loop scanning. (see the
709 * Quillere paper) and calls the loop simplification function.
710 * - depth is the loop depth we want to optimize (guard free as possible),
711 * the first loop depth is 1 and anegative value is the infinity depth.
712 * - sep_level is the level number where we want to start loop separation.
714 * - October 26th 2001: first version.
715 * - April 19th 2005: some basic fixes and memory usage feature.
716 * - April 29th 2005: (bug fix, bug found by DaeGon Kim) see case 2 below.
718 CloogProgram
* cloog_program_generate(program
, options
)
719 CloogProgram
* program
;
720 CloogOptions
* options
;
724 struct rusage start
, end
;
728 char status_path
[MAX_STRING_VAL
] ;
731 /* We initialize the memory need to 0. */
732 options
->memory
= 0 ;
735 if (options
->override
)
737 cloog_msg(options
, CLOOG_WARNING
,
738 "you are using -override option, be aware that the "
739 "generated\n code may be incorrect.\n") ;
742 { /* Playing with options may be dangerous, here are two possible issues :
743 * 1. Using -l option less than scattering dimension number may lead to
744 * an illegal target code (since the scattering is not respected), if
745 * it is the case, we set -l depth to the first acceptable value.
747 if ((program
->nb_scattdims
> options
->l
) && (options
->l
>= 0))
749 cloog_msg(options
, CLOOG_WARNING
,
750 "-l depth is less than the scattering dimension number "
751 "(the \n generated code may be incorrect), it has been "
752 "automaticaly set\n to this value (use option -override "
754 options
->l
= program
->nb_scattdims
;
757 /* 2. Using -f option greater than one while -l depth is greater than the
758 * scattering dimension number may lead to iteration duplication (try
759 * test/daegon_lu_osp.cloog with '-f 3' to test) because of the step 4b
760 * of the cloog_loop_generate function, if it is the case, we set -l to
761 * the first acceptable value.
763 if (((options
->f
> 1) || (options
->f
< 0)) &&
764 ((options
->l
> program
->nb_scattdims
) || (options
->l
< 0)))
766 cloog_msg(options
, CLOOG_WARNING
,
767 "-f depth is more than one, -l depth has been "
768 "automaticaly set\n to the scattering dimension number "
769 "(target code may have\n duplicated iterations), -l depth "
770 "has been automaticaly set to\n this value (use option "
771 "-override to override).\n") ;
772 options
->l
= program
->nb_scattdims
;
777 getrusage(RUSAGE_SELF
, &start
) ;
779 if (program
->loop
!= NULL
)
780 { loop
= program
->loop
;
783 loop
= cloog_loop_generate(loop
, program
->context
, 0, 0,
785 program
->nb_scattdims
,
789 /* We read into the status file of the process how many memory it uses. */
790 sprintf(status_path
,"/proc/%d/status",getpid()) ;
791 status
= fopen(status_path
, "r") ;
792 while (fscanf(status
,"%s",status_path
) && strcmp(status_path
,"VmData:")!=0);
793 fscanf(status
,"%d",&(options
->memory
)) ;
797 if ((!options
->nosimplify
) && (program
->loop
!= NULL
))
798 loop
= cloog_loop_simplify(loop
, program
->context
, 1);
800 program
->loop
= loop
;
804 getrusage(RUSAGE_SELF
, &end
) ;
805 /* We calculate the time spent in code generation. */
806 time
= (end
.ru_utime
.tv_usec
- start
.ru_utime
.tv_usec
)/(float)(MEGA
) ;
807 time
+= (float)(end
.ru_utime
.tv_sec
- start
.ru_utime
.tv_sec
) ;
808 options
->time
= time
;
816 * cloog_program_block function:
817 * this function gives a last chance to the lazy user to consider statement
818 * blocks instead of some statement lists where the whole list may be
819 * considered as a single statement from a code generation point of view.
820 * For instance two statements with the same iteration domain and the same
821 * scattering functions may be considered as a block. This function is lazy
822 * and can only find very simple forms of trivial blocks (see
823 * cloog_domain_lazy_block function for more details). The useless loops and
824 * scattering functions are removed and freed while the statement list of
825 * according blocks are filled.
826 * - program is the whole program structure (befaore applying scattering),
827 * - scattering is the list of scattering functions.
829 * - April 30th 2005: first attempt.
830 * - June 10-11th 2005: first working version.
832 void cloog_program_block(CloogProgram
*program
,
833 CloogScatteringList
*scattering
, CloogOptions
*options
)
834 { int blocked_reference
=0, blocked
=0, nb_blocked
=0 ;
835 CloogLoop
* reference
, * start
, * loop
;
836 CloogScatteringList
* scatt_reference
, * scatt_loop
, * scatt_start
;
838 if ((program
->loop
== NULL
) || (program
->loop
->next
== NULL
))
841 /* The process will use three variables for the linked list :
842 * - 'start' is the starting point of a new block,
843 * - 'reference' is the node of the block used for the block checking,
844 * - 'loop' is the candidate to be inserted inside the block.
845 * At the beginning of the process, the linked lists are as follow:
846 * O------>O------>O------>O------>NULL
852 reference
= program
->loop
;
853 start
= program
->loop
;
854 loop
= reference
->next
;
855 scatt_reference
= scattering
;
856 scatt_start
= scattering
;
857 scatt_loop
= scattering
->next
;
860 { if (cloog_domain_lazy_equal(reference
->domain
,loop
->domain
) &&
861 cloog_scattering_lazy_block(scatt_reference
->scatt
, scatt_loop
->scatt
,
862 scattering
,program
->nb_scattdims
))
863 { /* If we find a block we update the links:
866 * O O------>O------>O------>NULL
873 cloog_block_merge(start
->block
,loop
->block
); /* merge frees loop->block */
875 start
->next
= loop
->next
;
876 scatt_start
->next
= scatt_loop
->next
;
879 { /* If we didn't find a block, the next start of a block is updated:
880 * O------>O------>O------>O------>NULL
887 scatt_start
= scatt_loop
;
890 /* If the reference node has been included into a block, we can free it. */
891 if (blocked_reference
)
892 { reference
->next
= NULL
;
893 cloog_loop_free(reference
) ;
894 cloog_scattering_free(scatt_reference
->scatt
);
895 free(scatt_reference
) ;
898 /* The reference and the loop are now updated for the next try, the
899 * starting position depends on the previous step.
900 * O ? O------>O------>O------>NULL
906 scatt_reference
= scatt_loop
;
907 scatt_loop
= scatt_loop
->next
;
909 /* We mark the new reference as being blocked or not, if will be freed
910 * during the next while loop execution.
913 blocked_reference
= 1 ;
915 blocked_reference
= 0 ;
918 /* We free the last blocked reference if any (since in the while loop it was
919 * freed during the next loop execution, it was not possible to free the
922 if (blocked_reference
)
923 { reference
->next
= NULL
;
924 cloog_loop_free(reference
) ;
925 cloog_scattering_free(scatt_reference
->scatt
);
926 free(scatt_reference
) ;
930 cloog_msg(options
, CLOOG_INFO
, "%d domains have been blocked.\n", nb_blocked
);
935 * cloog_program_extract_scalars function:
936 * this functions finds and removes the dimensions of the scattering functions
937 * when they are scalar (i.e. of the shape "dim + scalar = 0") for all
938 * scattering functions. The reason is that the processing of such dimensions
939 * is trivial and do not need neither a row and a column in the matrix
940 * representation of the domain (this will save memory) neither the full
941 * Quillere processing (this will save time). The scalar dimensions data are
942 * dispatched in the CloogProgram structure (the boolean vector scaldims will
943 * say which original dimensions are scalar or not) and to the CloogBlock
944 * structures (each one has a scaldims vector that contains the scalar values).
945 * - June 14th 2005: first developments.
946 * - June 30th 2005: first version.
948 void cloog_program_extract_scalars(CloogProgram
*program
,
949 CloogScatteringList
*scattering
, CloogOptions
*options
)
950 { int i
, j
, scalar
, current
, nb_scaldims
=0 ;
951 CloogScatteringList
*start
;
952 CloogScattering
*old
;
958 for (i
=0;i
<program
->nb_scattdims
;i
++)
961 while (scattering
!= NULL
)
962 { if (!cloog_scattering_lazy_isscalar(scattering
->scatt
, i
, NULL
))
966 scattering
= scattering
->next
;
971 program
->scaldims
[i
] = 1 ;
975 /* If there are no scalar dimensions, we can continue directly. */
979 /* Otherwise, in each block, we have to put the number of scalar dimensions,
980 * and to allocate the memory for the scalar values.
982 for (loop
= program
->loop
; loop
; loop
= loop
->next
) {
984 block
->nb_scaldims
= nb_scaldims
;
985 block
->scaldims
= (cloog_int_t
*)malloc(nb_scaldims
*sizeof(cloog_int_t
));
986 for (i
=0;i
<nb_scaldims
;i
++)
987 cloog_int_init(block
->scaldims
[i
]);
990 /* Then we have to fill these scalar values, so we can erase those dimensions
991 * from the scattering functions. It's easier to begin with the last one,
992 * since there would be an offset otherwise (if we remove the i^th dimension,
993 * then the next one is not the (i+1)^th but still the i^th...).
995 current
= nb_scaldims
- 1 ;
996 for (i
=program
->nb_scattdims
-1;i
>=0;i
--)
997 if (program
->scaldims
[i
])
1000 for (loop
= program
->loop
; loop
; loop
= loop
->next
) {
1001 block
= loop
->block
;
1002 if (!cloog_scattering_lazy_isscalar(scattering
->scatt
, i
,
1003 &block
->scaldims
[current
])) {
1004 /* We should have found a scalar value: if not, there is an error. */
1005 cloog_die("dimension %d is not scalar as expected.\n", i
);
1007 scattering
= scattering
->next
;
1010 scattering
= start
;
1011 while (scattering
!= NULL
) {
1012 old
= scattering
->scatt
;
1013 scattering
->scatt
= cloog_scattering_erase_dimension(old
, i
);
1014 cloog_scattering_free(old
);
1015 scattering
= scattering
->next
;
1020 /* We postprocess the scaldims array in such a way that each entry is how
1021 * many scalar dimensions follows + 1 (the current one). This will make
1022 * some other processing easier (e.g. knowledge of some offsets).
1024 for (i
=0;i
<program
->nb_scattdims
-1;i
++)
1025 { if (program
->scaldims
[i
])
1027 while ((j
< program
->nb_scattdims
) && program
->scaldims
[j
])
1028 { program
->scaldims
[i
] ++ ;
1034 if (nb_scaldims
!= 0)
1035 cloog_msg(options
, CLOOG_INFO
, "%d dimensions (over %d) are scalar.\n",
1036 nb_scaldims
,program
->nb_scattdims
) ;
1041 * cloog_program_scatter function:
1042 * This function adds the scattering (scheduling) informations in a program.
1043 * If names is NULL, this function create names itself such that the i^th
1045 * - November 6th 2001: first version.
1047 void cloog_program_scatter(CloogProgram
*program
,
1048 CloogScatteringList
*scattering
, CloogOptions
*options
)
1049 { int scattering_dim
, scattering_dim2
, not_enough_constraints
=0 ;
1052 if ((program
!= NULL
) && (scattering
!= NULL
))
1053 { loop
= program
->loop
;
1055 /* We compute the scattering dimension and check it is >=0. */
1056 scattering_dim
= cloog_scattering_dimension(scattering
->scatt
, loop
->domain
);
1057 if (scattering_dim
< 0)
1058 cloog_die("scattering has not enough dimensions.\n");
1059 if (!cloog_scattering_fully_specified(scattering
->scatt
, loop
->domain
))
1060 not_enough_constraints
++ ;
1062 /* The scattering dimension may have been modified by scalar extraction. */
1063 scattering_dim
= cloog_scattering_dimension(scattering
->scatt
, loop
->domain
);
1065 /* Finally we scatter all loops. */
1066 cloog_loop_scatter(loop
, scattering
->scatt
);
1068 scattering
= scattering
->next
;
1070 while ((loop
!= NULL
) && (scattering
!= NULL
))
1071 { scattering_dim2
= cloog_scattering_dimension(scattering
->scatt
,
1073 if (scattering_dim2
!= scattering_dim
)
1074 cloog_die("scattering dimensions are not the same.\n") ;
1075 if (!cloog_scattering_fully_specified(scattering
->scatt
, loop
->domain
))
1076 not_enough_constraints
++ ;
1078 cloog_loop_scatter(loop
, scattering
->scatt
);
1080 scattering
= scattering
->next
;
1082 if ((loop
!= NULL
) || (scattering
!= NULL
))
1083 cloog_msg(options
, CLOOG_WARNING
,
1084 "there is not a scattering for each statement.\n");
1086 if (not_enough_constraints
)
1087 cloog_msg(options
, CLOOG_WARNING
, "not enough constraints for "
1088 "%d scattering function(s).\n",not_enough_constraints
) ;