2 Added some new access routines to types.
3 List of overwritten fields for entities.
4 Removed a bug in irnode.
7 Added a routine to set the mangled entity name.
8 Added two routines to copy entites.
11 Entities now have two more flags, for visibility and allocation mode.
12 Types that have a layout have a flag indicating whether the layout is
16 We distinguish three kinds of Cond nodes. These can be distinguished
17 by the mode of the selector operand and an internal flag of type cond_kind.
18 First we distinguish binary Conds and switch Conds.
19 A binary Cond has as selector a boolean value. Proj(0) projects the control
20 flow for case "False", Proj(1) the control flow for "True". A binary Cond
21 is recognized by the boolean selector.
22 The switch Cond has as selector an unsigned integer. It produces as result
23 an n+1 Tuple (cf0, ... , cfn) of control flows.
24 We differ two flavours of this Cond. The first, the dense Cond, passes
25 control along output i if the selector value is i, 0 <= i <= n. If the
26 selector value is >n it passes control along output n.
27 The second Cond flavor differes in the treatment of cases not specified in
28 the source program. It magically knows about the existence of Proj nodes.
29 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
30 exists. Else it passes control along output n (even if this Proj does not
31 exist.) This Cond we call "fragmentary". There is a special constructor
32 new_defaultProj that automatically sets the flavor.
33 The two switch flavors are distinguished by a flag of type cond_kind.
34 Default flavor is "dense"
38 tv now implements Minus, Abs.
39 iropt now optimizes these and Div, Mod, Quot, DivMod.
40 Still missing: Shrs, Rot.
41 tarval_shr somtimes performs shrs, depending on the compiler/system!!
42 If the ArmRoq implementation is faulty there might appear errors.
45 Changed ircons: If undefined values are used the Phi construction
46 inserts a constant with value tarval_bad.
49 Changed array bounds in type.h to ir_node*. This allows to
50 construct array bounds that are complex constant expressions
51 simpler. Further dynamic array bounds can be displayed.
52 Comment in ircons.c extended: undefined values in start_block.
55 ifdef'ed all uses of gmp in tv.c away. Optimizations for
56 mode_Z no more supported, as well as constants of that mode.
59 Dokumentation in ir_dump
60 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
61 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
64 We need an entity for the array elements for the Sel nodes. This
65 entity should be stored in the array type. Changed constructor
66 parameters: include array element type. Entity for elements is built
71 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
74 Added list of member entites to union. unioned_types and delimiters
75 are superfluous now -- removed.
76 Rationale: we want to express selection of a union member as a Sel
77 node. for this we need to have entities. The entities contain the
78 unioned type and have as name the delimiters...
81 Changed Makefile/MakeTargets to install headers and libraries
85 Changed Makefile and Configure scripts to produce a proper tar file
86 for distribution (libfirm-VERSION.tar)
87 Use 'make distrib' instead of 'make dist'
90 Changed implementation of tr module. With this I also changed the
91 interface!! Type casts are unnecessary now, but some access funcions
95 ======================================================================
96 ==================== New version: 0.3.0 ==============================
97 ======================================================================
103 added creation of a tar archive for distribution
104 replaced ir/.dummy.in by ir/Makefile.in
107 Changed equivalent_node() and copy_preds() so that the end block
108 is not optimized away if it has no real predecessors. This fixes
109 the problem with the while examples.
110 Added while_example in Makefile
113 Fooled around with if_while_example: Why does cse make it abort?
114 Cse removes path to End node, Bad remains as pred of Endblock.
115 The block walker can't deal with this.
116 Made new example with only loop: while_example.
119 added auto documentation in Makefiles, configure, etc
120 example in ir/ir/ircons.c - much must be added
121 creation of documentation by 'make autodoc' in architecture directory
124 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
125 replaced some C++ style comments (//) by standard C comments /**/
128 - configure (with some features, see --help for more)
129 - make [depend | tags | install]
130 - make [run] in testprograms
132 - compilation on SunOS
134 - automatic call of autoconf if required
137 More colours in vcg output.
138 Fixed bug: cse found that start block equals it's
139 first successor as both have the Start block as predecessor.
140 This only happens for local_optimize_graph() as during construction
141 the Start block is not entered in the value table.
142 Changed implementation: irgmod: local_optimize_graph() did not
143 empty the hash table with the irnodes for cse. This might cause that
144 cse turns up with a node that seems better but was removed from the
145 graph in an earlier optimization phase.
146 Removed old #if 1 from ircons.c
147 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
148 Optimizes blocks that had bad predecessors.
153 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
154 Added a module deb_info in debug.h. Adapted makefile. Added example
156 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
158 Removed inabled code for dead node elimination in irgopt.h.
159 Renamed some missnamed access routines (_of_). Macros with old names
160 are in old_fctnames.h.
161 Edited makefiles to remove #* and *.flc.
164 Some minor bugfixes...
167 After compacting of in arrays in dead_node_elimination
168 merge blocks and remove Phis with one pred.
171 Freeing of obstack in dead_node_elimination commented in.
172 Compacting in arrays of Block and Phi nodes in dead_node_
177 added set/get_SymConst_type_or_id in irnode.h
178 added field offset to entity in entity.h
179 added field size to type_class in type.h
180 include "gmp.h" in tv.h with "" instead <>
183 Some changes to make the lib better portable
186 Initialize max_node_nr in irprog.
189 Now outputs warning if faulty type in irdump, dump_type_info.
190 Explicit string termination in irdump, vcg_open.
193 Added external to declaration of irp.
194 Added typedef before pns and pnc_number.
195 irmode.c, init_mode(): We need to memset all new modes as
196 tarval_vrfy reads fields before they are initialized: It
197 compares to min/max when tarvals for min/max are allocated!
200 Changed parameter of Methods in type.h and type.c from
201 class to clss. Class is a C++ keyword.
204 Changed some testprograms to accomodate Uebprakt.
207 Finished implementation of dump_all_types.
208 Added new testprogram inheritance_example.
211 Added seven access routines in type.[hc]:
212 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
213 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
214 Fixed the type_walk_2 for those seven routines.
217 Added irdump routine dump_all_types.
218 Did changes to irprog, type, typewalk to achieve this.
219 typewalk needs to walk along members, sub and supertypes, this
220 is still missing! irdump then needs to output these edges.
222 ======================================================================
223 ==================== New version: 0.2.5 ==============================
224 ======================================================================
227 Made new Version: 0.2.5
229 15.8.2000 Goetz until 3.9.00
230 Separated irnode.h and many others into two files: one public
232 Added funcionality to extract headers for lib.
235 type_dump also dumps irg->ent
236 if_example: corrected nr of locals
239 irgopt: Correct copy of self pointer in start block.
240 irgopt: Correct treatment of loops: pre function in walker
241 breaks all possible loops in Phi and Block nodes.
242 irr_loop_example: wrong Return statement
243 Now I fixed all but one error: in memory_example.
244 This error showed a conceptual problem, so I wrote
245 a slightly different algorithm. This now runs for
247 dead_node_example: cse is buggy!! merges start and the
251 looking at bug in dead_node_elimination.
253 irnode: all get_..._arr functions changed
254 ircons: new_r_Block: set matured flag.
255 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
256 adapted call_str_example to new concepts.
259 Implemented simpler Phi construction algorithm that constructs
260 correct code for three_cfpred_example in ircons. This algorithm
261 generates more Id nodes than the original algorithm and therefore
263 Also made some changes to optimizations of Not.
266 Fixed a bug, caused by the recursive use in type.h and entity.h.
267 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
268 Fixed a problem in if_while testprogram, so it now works.
271 Fixed bug in optimize(). Returned Null instead n if
272 get_optimize() == false.
275 Added some access routines in type.[hc]. Solved a recursive definition
276 of type_class struct, entity struct and type union.
279 Separated entity header into pure functional header and header
283 ... a bunch small changes not documented
286 Changed output of oo_prog_example: now uses the internal list
287 of all irgs. Had to implement some of the access routines for
288 that. Also fixed a bug in irdump. Main routines did not use
289 current_ir_graph properly.
292 Implemented some missing parts in irgopt.
293 Added field irg to entity. Only valid if entity is a method.
294 Had to resove a cyclic de[endency between irgraph.h and entity.h
296 Added fields sub and super to type_class for inheritance.
297 Added field main_irg to irprog.
300 Fixed some bugs in irgopt.c
301 Added some missing 'get_new_node' methods, so the new obstack contains
305 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
306 Solved some copy'n'paste problems. Deleted most debug-code!
307 Added comments to several files.
310 Fixed bug in _r_ constructors for all four Div operations.
311 Fixed bug in turn_into_tuple: didn't remember the block.
312 Tested transform_node.
315 Fixed some testprograms to new semantics of firm.
316 Added testprogram global_var_example.
317 Fixed a bug in irop: Size of Sel node was (entity *) instead of
318 sel_attr. Therefor array_heap_example aborted.
319 Also found a missing break in typewalk, case iro_Alloc.
320 Added a construct that unifies all things constructed by the lib
321 and needed to represent a program: irprog.ch
322 This contains a list of all types as well as a list of all ir graphs.
323 I added calls to initialization and constructors so that this is constructed
324 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
325 Removed strange block struct and constructor from ircons.c.
326 Moved routines for automatic Phi construction from irgmod to ircons.
327 Sorted functions in ircons to reflect the different interfaces.
328 Renamed dataseg to globals to be conformant with documentation.
329 Added conservation of current_ir_graph to irgopt.c.
330 Corrected bug in Makefiles: wrong path to directory ./inlude.
333 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
334 We should change the naming of the Block constructor.
335 Removed acces routines to attr. "closed" of Block.
336 Removed second implementation of new_ir_node from ircons and some comments
337 concerned with the now resolved cyclic dependency.
338 Fixed some bugs in irgopt so that the compilation goes through.
341 Changed the irnode attribut 'visit' into 'visited'.
342 Added some access functions, like get/set_irn_visit etc.
345 Renamed some access funtion in irgraph.*.
346 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
347 Added two attributes to the irgraph struct. The visited flags belongs
348 to a ir graph, not to a whole program.
351 A new optimization has been finished. The dead-node-elimination copies
352 the existing ir graph from one opstack to another. While walking the
353 graph, only the reachable nodes will be copied, so the "dead-nodes"
354 (unreachable in the controlflow) are removed.
357 Solved some problems in the 'copy_node' function. The in array was not
358 as easy as it seamed.
361 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
362 optimization, which is needed in the paramter list of 'irg_walk'.
365 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
366 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
370 Removed some files from the archive, after dependencies and usage are
372 - 'ir/common/strerror.c'
374 - 'ir/ident/xx_ident.h'
375 an empty file, only included by 'ident.c', but never used;
376 - 'ir/tv/label.c' and
378 contained a numeric counter;
379 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
380 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
381 In the old fiasco compiler, the label thing is used in the backend.
382 Search for 'babil' to see the usage.
383 Also removed the two attributes 'lab' and 'used' in the tarval struct.
386 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
387 afterwards some recursive includes, so libfirm works again.
390 Did a lot of changes, which I never commented until now (4.7.00).
392 * Added new result to Start node: Pointer to global data segment.
393 * Extended Semantics of SymConst node to represent information for the
395 * Added arithmeitc nodes (Shrs, Minus ...)
397 Rearranged the directory structure and adjusted the makefiles.
398 The directories contain:
399 ir: everything for the intermediate representation (better: src?)
400 /ir: the ir itself, and standard optimizations.
401 /tv: the target value module
402 /tr: the type and entity representation
403 /adt: abstract data types
404 /common: stuff needed by all other dirs
405 /debug: debugging Unterstuetzung
407 include: external files needen as includes
408 testprograms: examples to test the lib.
410 The makefiles generate files with extension .d that contain the dependencies
414 Added access routine to attribute link of irnode in irnode.ch.
415 Added get_negated_pnc to irnode.ch.
418 Added an iterator in iropt that calls the optimization for all nodes.
419 Copied optimize's code to optimize_in_place and removed deallocations.
420 Made set_irn_n in irnode.c public.
421 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
422 are allowded as cfgpredecessors to represent dead "incoming" control
424 Added call to optimize_in_place in mature_block. Is this useful?
427 Changed tests from comparing enums to comparing pointers. This is more
428 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
429 now get_irn_op == op_And
432 Compared equivalent_value to the one in the original fiasco.
433 Added a test in case iro_And.
434 Changed implementation of iro_Div. Added routines turn_into_tuple
435 and set_irn_op() in irgmod/irnode.
436 Changed implementation of irn_Minus (although commented out).
437 Now all features are ported or documented for this function.
440 Compared computed_value to the one in the original fiasco.
441 Added one further optimization in case iro_Proj.
442 Now all features are ported for this function.
445 Updated comments in ircons.h.
448 Changed possible attribute of SymConst from type_class to type.
449 SymConst size could be the size of a union, array, ...
452 Implemented two dumpers that dump type information and a graph with
456 Implemented a walker that walks over the type informatin that can
457 be reached from an ir node.
458 Added routine get_kind(firm_thing) in common.h, Added file common.c.
459 Added files typewalk.ch and routines to irdump.
460 Added visited flags and initialization to entity and all types.
461 Implemented some of the missing access routines in type.c, entity.c
464 Implemented constructor for ShrA.
466 Added routine that iterates the graph and verifies all nodes.
467 Added Phi_in stack to irgraph. This allows to build several
468 graphs at once with respect to the Phi building algorithm.
471 Implemented dumper for control flow graphs. Changed irr_* and dead_*
472 examples to dump cfg.
475 Implemeted explicit stack for the Phi node generation. See ircons.c.
478 added include string.h in xoprintf.c to get rid of warning:
479 implicit declaration of function `bcopy'
483 Added more cases to equivalent_node.
484 Portet gigo, identify, identify_remember.
485 The set/pset library can not handle several hash tables. At least,
486 compiling several procedures causes a segmentation fault during access
487 to the tables (oo_program_example). Need to work on this.
488 transform_node still needs to be ported.
489 some cases in equivalent_node are still missing.
491 To get it running I had to remove the call to optimize in the
492 new_Block constructor. It can only be called when the Block is
496 Introduced a walker that walks only over blocks. The asserts
497 might be too strict for general graphs, but so far it works.
498 For the walker I introduced an additional flag in the attribute
499 of Blocks, an a global block_visited variable (in irgraph.h).
500 Furhter I modularized dump_ir_node, implemented dump_ir_graph
501 with the existing walker, and added new routines to output a
503 Changed the examples to call the new dump routine.
506 Added auxiliary routines to ir_node:
507 skip_Proj, skip_Nop, is_Bad ...
508 Changed access routines to use get_irn_n instead of explicit array
509 accesses. Changed get_irn_n to call skip_Id, so that the access routines
510 never will return Id nodes.
513 Repaired Phi computation, changed new_r_Phi_in. Added test program to
514 test irregular controlflow.
517 Updated optimizations computed_value and equivalent_node to new
518 Syntax of FIRM nodes and to use access routines.
519 Added routine skip_Proj in irnode.
521 2.2.2000 Boris Boesler
522 Added files irgwalk.c and irgwalk.h. They include a simple function to
523 traverse an ir graph and execute pre and post functions to current node.
526 Added arrays with parameters and result types to the type informtion
527 of a procedure. This is needed for the code generation. Also added
528 the corresponding access routines.
529 Adapted the testprograms.
532 Found a bug / complication: the call order
533 get_value (makes Phi0, put's it into graph_arr)
534 set_value (overwrites Phi0 in graph_arr)
535 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
537 fails. Added test wether graph_arr is already set in phi_merge.
539 Added tons of comments to explain Phi generation -- the stack hack.
543 irdump now outputs the pnc_number for projs of Cmp nodes.
544 Added routine to access the pnc_string.
547 Added result "dataseg" to Start node, with all it's consequences.
548 We need this for the compiler lab to translate global variables.
549 Now they can be selected from the data segment, and the start
550 node supplies the pointer to this segment.
551 These changes are guarded by preprocessor variable UEBPRAKT in
553 Changed files: common.h, irgraph.ch, irnode.h
557 removed array_example, added array-heap_example and
558 array-stack_example and adapted makefile.
560 Entity now also allows type_method as owner. This is to model
561 the stack, Sel nodes that select a variable (array) from the
562 stack need an entity that describes what they select. This
563 entity gets the type of the enclosing procedure as owner.
566 Added future access routines in `irmode.[ch]' as comments,
567 that all attributes in the ir_mode struct can be user-defined.
568 Added access routines in `irgraph.[ch]', for all attributes.
571 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
572 Added `irvrfy.[ch]' to MAKEFILE
573 Added "inline" before access routines in `irnode.h', that no warnings
574 will appear furthermore.
575 Added three more access routines in `irmode.[ch]':
576 struct tarval *get_min_of_mode (ir_mode *mode);
577 struct tarval *get_max_of_mode (ir_mode *mode);
578 struct tarval *get_null_of_mode (ir_mode *mode);
581 Adaption of Alloc, Sel and Entity to new types:
582 Changed array_example to use type instead of type_class.
583 Changed entity to allow all types as owner instead of
584 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
585 Changed alloc to allow allocating variables of any type instead of
587 Adapted all testprograms to avoid warnings.
589 removed dtest ... from Makefile, replaced by test.
592 Added "run" to makefile, added array_example to makefile of testprograms.
593 Corrected testprogram array
594 Changed assert in irvrfy -- Conv.
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