3 Bugfix: dead node elimination did not replace the hash table
7 Added routine remove_irp_irg.
8 Changed comment to free_ir_graph.
11 Added routine to free irgraphs.
14 Improved add routines to sub, supertype in type.c
17 Added implementation of overwrites stuff.
20 Implemented stuff to change the type graph. See
21 typegmod.h and tpop.h for basic documentation of the change.
22 There now exists a type of kind type_id. If this appears
23 externally this is a bug.
26 Added some new access routines to types.
27 List of overwritten fields for entities.
28 Removed a bug in irnode.
31 Added a routine to set the mangled entity name.
32 Added two routines to copy entites.
35 Entities now have two more flags, for visibility and allocation mode.
36 Types that have a layout have a flag indicating whether the layout is
40 We distinguish three kinds of Cond nodes. These can be distinguished
41 by the mode of the selector operand and an internal flag of type cond_kind.
42 First we distinguish binary Conds and switch Conds.
43 A binary Cond has as selector a boolean value. Proj(0) projects the control
44 flow for case "False", Proj(1) the control flow for "True". A binary Cond
45 is recognized by the boolean selector.
46 The switch Cond has as selector an unsigned integer. It produces as result
47 an n+1 Tuple (cf0, ... , cfn) of control flows.
48 We differ two flavours of this Cond. The first, the dense Cond, passes
49 control along output i if the selector value is i, 0 <= i <= n. If the
50 selector value is >n it passes control along output n.
51 The second Cond flavor differes in the treatment of cases not specified in
52 the source program. It magically knows about the existence of Proj nodes.
53 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
54 exists. Else it passes control along output n (even if this Proj does not
55 exist.) This Cond we call "fragmentary". There is a special constructor
56 new_defaultProj that automatically sets the flavor.
57 The two switch flavors are distinguished by a flag of type cond_kind.
58 Default flavor is "dense"
62 tv now implements Minus, Abs.
63 iropt now optimizes these and Div, Mod, Quot, DivMod.
64 Still missing: Shrs, Rot.
65 tarval_shr somtimes performs shrs, depending on the compiler/system!!
66 If the ArmRoq implementation is faulty there might appear errors.
69 Changed ircons: If undefined values are used the Phi construction
70 inserts a constant with value tarval_bad.
73 Changed array bounds in type.h to ir_node*. This allows to
74 construct array bounds that are complex constant expressions
75 simpler. Further dynamic array bounds can be displayed.
76 Comment in ircons.c extended: undefined values in start_block.
79 ifdef'ed all uses of gmp in tv.c away. Optimizations for
80 mode_Z no more supported, as well as constants of that mode.
83 Dokumentation in ir_dump
84 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
85 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
88 We need an entity for the array elements for the Sel nodes. This
89 entity should be stored in the array type. Changed constructor
90 parameters: include array element type. Entity for elements is built
95 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
98 Added list of member entites to union. unioned_types and delimiters
99 are superfluous now -- removed.
100 Rationale: we want to express selection of a union member as a Sel
101 node. for this we need to have entities. The entities contain the
102 unioned type and have as name the delimiters...
105 Changed Makefile/MakeTargets to install headers and libraries
109 Changed Makefile and Configure scripts to produce a proper tar file
110 for distribution (libfirm-VERSION.tar)
111 Use 'make distrib' instead of 'make dist'
114 Changed implementation of tr module. With this I also changed the
115 interface!! Type casts are unnecessary now, but some access funcions
119 ======================================================================
120 ==================== New version: 0.3.0 ==============================
121 ======================================================================
127 added creation of a tar archive for distribution
128 replaced ir/.dummy.in by ir/Makefile.in
131 Changed equivalent_node() and copy_preds() so that the end block
132 is not optimized away if it has no real predecessors. This fixes
133 the problem with the while examples.
134 Added while_example in Makefile
137 Fooled around with if_while_example: Why does cse make it abort?
138 Cse removes path to End node, Bad remains as pred of Endblock.
139 The block walker can't deal with this.
140 Made new example with only loop: while_example.
143 added auto documentation in Makefiles, configure, etc
144 example in ir/ir/ircons.c - much must be added
145 creation of documentation by 'make autodoc' in architecture directory
148 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
149 replaced some C++ style comments (//) by standard C comments /**/
152 - configure (with some features, see --help for more)
153 - make [depend | tags | install]
154 - make [run] in testprograms
156 - compilation on SunOS
158 - automatic call of autoconf if required
161 More colours in vcg output.
162 Fixed bug: cse found that start block equals it's
163 first successor as both have the Start block as predecessor.
164 This only happens for local_optimize_graph() as during construction
165 the Start block is not entered in the value table.
166 Changed implementation: irgmod: local_optimize_graph() did not
167 empty the hash table with the irnodes for cse. This might cause that
168 cse turns up with a node that seems better but was removed from the
169 graph in an earlier optimization phase.
170 Removed old #if 1 from ircons.c
171 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
172 Optimizes blocks that had bad predecessors.
177 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
178 Added a module deb_info in debug.h. Adapted makefile. Added example
180 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
182 Removed inabled code for dead node elimination in irgopt.h.
183 Renamed some missnamed access routines (_of_). Macros with old names
184 are in old_fctnames.h.
185 Edited makefiles to remove #* and *.flc.
188 Some minor bugfixes...
191 After compacting of in arrays in dead_node_elimination
192 merge blocks and remove Phis with one pred.
195 Freeing of obstack in dead_node_elimination commented in.
196 Compacting in arrays of Block and Phi nodes in dead_node_
201 added set/get_SymConst_type_or_id in irnode.h
202 added field offset to entity in entity.h
203 added field size to type_class in type.h
204 include "gmp.h" in tv.h with "" instead <>
207 Some changes to make the lib better portable
210 Initialize max_node_nr in irprog.
213 Now outputs warning if faulty type in irdump, dump_type_info.
214 Explicit string termination in irdump, vcg_open.
217 Added external to declaration of irp.
218 Added typedef before pns and pnc_number.
219 irmode.c, init_mode(): We need to memset all new modes as
220 tarval_vrfy reads fields before they are initialized: It
221 compares to min/max when tarvals for min/max are allocated!
224 Changed parameter of Methods in type.h and type.c from
225 class to clss. Class is a C++ keyword.
228 Changed some testprograms to accomodate Uebprakt.
231 Finished implementation of dump_all_types.
232 Added new testprogram inheritance_example.
235 Added seven access routines in type.[hc]:
236 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
237 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
238 Fixed the type_walk_2 for those seven routines.
241 Added irdump routine dump_all_types.
242 Did changes to irprog, type, typewalk to achieve this.
243 typewalk needs to walk along members, sub and supertypes, this
244 is still missing! irdump then needs to output these edges.
246 ======================================================================
247 ==================== New version: 0.2.5 ==============================
248 ======================================================================
251 Made new Version: 0.2.5
253 15.8.2000 Goetz until 3.9.00
254 Separated irnode.h and many others into two files: one public
256 Added funcionality to extract headers for lib.
259 type_dump also dumps irg->ent
260 if_example: corrected nr of locals
263 irgopt: Correct copy of self pointer in start block.
264 irgopt: Correct treatment of loops: pre function in walker
265 breaks all possible loops in Phi and Block nodes.
266 irr_loop_example: wrong Return statement
267 Now I fixed all but one error: in memory_example.
268 This error showed a conceptual problem, so I wrote
269 a slightly different algorithm. This now runs for
271 dead_node_example: cse is buggy!! merges start and the
275 looking at bug in dead_node_elimination.
277 irnode: all get_..._arr functions changed
278 ircons: new_r_Block: set matured flag.
279 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
280 adapted call_str_example to new concepts.
283 Implemented simpler Phi construction algorithm that constructs
284 correct code for three_cfpred_example in ircons. This algorithm
285 generates more Id nodes than the original algorithm and therefore
287 Also made some changes to optimizations of Not.
290 Fixed a bug, caused by the recursive use in type.h and entity.h.
291 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
292 Fixed a problem in if_while testprogram, so it now works.
295 Fixed bug in optimize(). Returned Null instead n if
296 get_optimize() == false.
299 Added some access routines in type.[hc]. Solved a recursive definition
300 of type_class struct, entity struct and type union.
303 Separated entity header into pure functional header and header
307 ... a bunch small changes not documented
310 Changed output of oo_prog_example: now uses the internal list
311 of all irgs. Had to implement some of the access routines for
312 that. Also fixed a bug in irdump. Main routines did not use
313 current_ir_graph properly.
316 Implemented some missing parts in irgopt.
317 Added field irg to entity. Only valid if entity is a method.
318 Had to resove a cyclic de[endency between irgraph.h and entity.h
320 Added fields sub and super to type_class for inheritance.
321 Added field main_irg to irprog.
324 Fixed some bugs in irgopt.c
325 Added some missing 'get_new_node' methods, so the new obstack contains
329 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
330 Solved some copy'n'paste problems. Deleted most debug-code!
331 Added comments to several files.
334 Fixed bug in _r_ constructors for all four Div operations.
335 Fixed bug in turn_into_tuple: didn't remember the block.
336 Tested transform_node.
339 Fixed some testprograms to new semantics of firm.
340 Added testprogram global_var_example.
341 Fixed a bug in irop: Size of Sel node was (entity *) instead of
342 sel_attr. Therefor array_heap_example aborted.
343 Also found a missing break in typewalk, case iro_Alloc.
344 Added a construct that unifies all things constructed by the lib
345 and needed to represent a program: irprog.ch
346 This contains a list of all types as well as a list of all ir graphs.
347 I added calls to initialization and constructors so that this is constructed
348 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
349 Removed strange block struct and constructor from ircons.c.
350 Moved routines for automatic Phi construction from irgmod to ircons.
351 Sorted functions in ircons to reflect the different interfaces.
352 Renamed dataseg to globals to be conformant with documentation.
353 Added conservation of current_ir_graph to irgopt.c.
354 Corrected bug in Makefiles: wrong path to directory ./inlude.
357 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
358 We should change the naming of the Block constructor.
359 Removed acces routines to attr. "closed" of Block.
360 Removed second implementation of new_ir_node from ircons and some comments
361 concerned with the now resolved cyclic dependency.
362 Fixed some bugs in irgopt so that the compilation goes through.
365 Changed the irnode attribut 'visit' into 'visited'.
366 Added some access functions, like get/set_irn_visit etc.
369 Renamed some access funtion in irgraph.*.
370 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
371 Added two attributes to the irgraph struct. The visited flags belongs
372 to a ir graph, not to a whole program.
375 A new optimization has been finished. The dead-node-elimination copies
376 the existing ir graph from one opstack to another. While walking the
377 graph, only the reachable nodes will be copied, so the "dead-nodes"
378 (unreachable in the controlflow) are removed.
381 Solved some problems in the 'copy_node' function. The in array was not
382 as easy as it seamed.
385 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
386 optimization, which is needed in the paramter list of 'irg_walk'.
389 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
390 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
394 Removed some files from the archive, after dependencies and usage are
396 - 'ir/common/strerror.c'
398 - 'ir/ident/xx_ident.h'
399 an empty file, only included by 'ident.c', but never used;
400 - 'ir/tv/label.c' and
402 contained a numeric counter;
403 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
404 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
405 In the old fiasco compiler, the label thing is used in the backend.
406 Search for 'babil' to see the usage.
407 Also removed the two attributes 'lab' and 'used' in the tarval struct.
410 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
411 afterwards some recursive includes, so libfirm works again.
414 Did a lot of changes, which I never commented until now (4.7.00).
416 * Added new result to Start node: Pointer to global data segment.
417 * Extended Semantics of SymConst node to represent information for the
419 * Added arithmeitc nodes (Shrs, Minus ...)
421 Rearranged the directory structure and adjusted the makefiles.
422 The directories contain:
423 ir: everything for the intermediate representation (better: src?)
424 /ir: the ir itself, and standard optimizations.
425 /tv: the target value module
426 /tr: the type and entity representation
427 /adt: abstract data types
428 /common: stuff needed by all other dirs
429 /debug: debugging Unterstuetzung
431 include: external files needen as includes
432 testprograms: examples to test the lib.
434 The makefiles generate files with extension .d that contain the dependencies
438 Added access routine to attribute link of irnode in irnode.ch.
439 Added get_negated_pnc to irnode.ch.
442 Added an iterator in iropt that calls the optimization for all nodes.
443 Copied optimize's code to optimize_in_place and removed deallocations.
444 Made set_irn_n in irnode.c public.
445 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
446 are allowded as cfgpredecessors to represent dead "incoming" control
448 Added call to optimize_in_place in mature_block. Is this useful?
451 Changed tests from comparing enums to comparing pointers. This is more
452 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
453 now get_irn_op == op_And
456 Compared equivalent_value to the one in the original fiasco.
457 Added a test in case iro_And.
458 Changed implementation of iro_Div. Added routines turn_into_tuple
459 and set_irn_op() in irgmod/irnode.
460 Changed implementation of irn_Minus (although commented out).
461 Now all features are ported or documented for this function.
464 Compared computed_value to the one in the original fiasco.
465 Added one further optimization in case iro_Proj.
466 Now all features are ported for this function.
469 Updated comments in ircons.h.
472 Changed possible attribute of SymConst from type_class to type.
473 SymConst size could be the size of a union, array, ...
476 Implemented two dumpers that dump type information and a graph with
480 Implemented a walker that walks over the type informatin that can
481 be reached from an ir node.
482 Added routine get_kind(firm_thing) in common.h, Added file common.c.
483 Added files typewalk.ch and routines to irdump.
484 Added visited flags and initialization to entity and all types.
485 Implemented some of the missing access routines in type.c, entity.c
488 Implemented constructor for ShrA.
490 Added routine that iterates the graph and verifies all nodes.
491 Added Phi_in stack to irgraph. This allows to build several
492 graphs at once with respect to the Phi building algorithm.
495 Implemented dumper for control flow graphs. Changed irr_* and dead_*
496 examples to dump cfg.
499 Implemeted explicit stack for the Phi node generation. See ircons.c.
502 added include string.h in xoprintf.c to get rid of warning:
503 implicit declaration of function `bcopy'
507 Added more cases to equivalent_node.
508 Portet gigo, identify, identify_remember.
509 The set/pset library can not handle several hash tables. At least,
510 compiling several procedures causes a segmentation fault during access
511 to the tables (oo_program_example). Need to work on this.
512 transform_node still needs to be ported.
513 some cases in equivalent_node are still missing.
515 To get it running I had to remove the call to optimize in the
516 new_Block constructor. It can only be called when the Block is
520 Introduced a walker that walks only over blocks. The asserts
521 might be too strict for general graphs, but so far it works.
522 For the walker I introduced an additional flag in the attribute
523 of Blocks, an a global block_visited variable (in irgraph.h).
524 Furhter I modularized dump_ir_node, implemented dump_ir_graph
525 with the existing walker, and added new routines to output a
527 Changed the examples to call the new dump routine.
530 Added auxiliary routines to ir_node:
531 skip_Proj, skip_Nop, is_Bad ...
532 Changed access routines to use get_irn_n instead of explicit array
533 accesses. Changed get_irn_n to call skip_Id, so that the access routines
534 never will return Id nodes.
537 Repaired Phi computation, changed new_r_Phi_in. Added test program to
538 test irregular controlflow.
541 Updated optimizations computed_value and equivalent_node to new
542 Syntax of FIRM nodes and to use access routines.
543 Added routine skip_Proj in irnode.
545 2.2.2000 Boris Boesler
546 Added files irgwalk.c and irgwalk.h. They include a simple function to
547 traverse an ir graph and execute pre and post functions to current node.
550 Added arrays with parameters and result types to the type informtion
551 of a procedure. This is needed for the code generation. Also added
552 the corresponding access routines.
553 Adapted the testprograms.
556 Found a bug / complication: the call order
557 get_value (makes Phi0, put's it into graph_arr)
558 set_value (overwrites Phi0 in graph_arr)
559 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
561 fails. Added test wether graph_arr is already set in phi_merge.
563 Added tons of comments to explain Phi generation -- the stack hack.
567 irdump now outputs the pnc_number for projs of Cmp nodes.
568 Added routine to access the pnc_string.
571 Added result "dataseg" to Start node, with all it's consequences.
572 We need this for the compiler lab to translate global variables.
573 Now they can be selected from the data segment, and the start
574 node supplies the pointer to this segment.
575 These changes are guarded by preprocessor variable UEBPRAKT in
577 Changed files: common.h, irgraph.ch, irnode.h
581 removed array_example, added array-heap_example and
582 array-stack_example and adapted makefile.
584 Entity now also allows type_method as owner. This is to model
585 the stack, Sel nodes that select a variable (array) from the
586 stack need an entity that describes what they select. This
587 entity gets the type of the enclosing procedure as owner.
590 Added future access routines in `irmode.[ch]' as comments,
591 that all attributes in the ir_mode struct can be user-defined.
592 Added access routines in `irgraph.[ch]', for all attributes.
595 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
596 Added `irvrfy.[ch]' to MAKEFILE
597 Added "inline" before access routines in `irnode.h', that no warnings
598 will appear furthermore.
599 Added three more access routines in `irmode.[ch]':
600 struct tarval *get_min_of_mode (ir_mode *mode);
601 struct tarval *get_max_of_mode (ir_mode *mode);
602 struct tarval *get_null_of_mode (ir_mode *mode);
605 Adaption of Alloc, Sel and Entity to new types:
606 Changed array_example to use type instead of type_class.
607 Changed entity to allow all types as owner instead of
608 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
609 Changed alloc to allow allocating variables of any type instead of
611 Adapted all testprograms to avoid warnings.
613 removed dtest ... from Makefile, replaced by test.
616 Added "run" to makefile, added array_example to makefile of testprograms.
617 Corrected testprogram array
618 Changed assert in irvrfy -- Conv.
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