2 Removed all obsolete Makefiles
5 Added support for constant entities. A new example program illustrates
6 their use. Extended dumper routines to dump constant values.
9 Extendend "comfortable" construction interface by some methods
10 serving as simple shortcuts.
13 Added a class type to irgs. This class type is to be used as owner
14 for local entities of the procedure. This are all entities allocated
15 for each execution of the procedure.
16 The class type is allocated automatically by new_ir_graph(). Access
17 routines to get this type are in irgraph.h.
18 We chose a class type as this allows to represent "inner" procedures
20 Adapted array-stack-example.
23 irdump outputs nodeids instead of pointers for labels of nodes.
24 With a preprocessor flag in common.h this can be turned off.
27 Added an Id tag to every .c and .h file
30 Changed SSA constuction for exception control flow.
31 If PRECISE_EXC_CONTEXT is used Phi nodes will use the values
32 valid when the execption operation was allocated. This increases
33 the memory consuption of the construction algorithm by
37 Added method to replace in array of a node in irnode.c/h
38 Added functionality to irgmod:
39 * collect all Phi nodes as link-list in the Blocks link field
40 * collect all Proj nodes as link-list in node producing the tuple.
41 * Seperate a Block into two
42 Added inlining transformation in irgopt.h
43 Improved output of dump_ir_block_graph. Now also dumps nodes that
44 don't belong to a block.
45 Added flag opt_unreachable_code, opt_inline.
46 Changed irvrfy so that it accepts nodes with Bad predecessors.
49 renamed get_type_nameid to get_type_ident
52 Bugfix: dead node elimination did not replace the hash table
56 Added routine remove_irp_irg.
57 Changed comment to free_ir_graph.
60 Added routine to free irgraphs.
63 Improved add routines to sub, supertype in type.c
66 Added implementation of overwrites stuff.
69 Implemented stuff to change the type graph. See
70 typegmod.h and tpop.h for basic documentation of the change.
71 There now exists a type of kind type_id. If this appears
72 externally this is a bug.
75 Added some new access routines to types.
76 List of overwritten fields for entities.
77 Removed a bug in irnode.
80 Added a routine to set the mangled entity name.
81 Added two routines to copy entites.
84 Entities now have two more flags, for visibility and allocation mode.
85 Types that have a layout have a flag indicating whether the layout is
89 We distinguish three kinds of Cond nodes. These can be distinguished
90 by the mode of the selector operand and an internal flag of type cond_kind.
91 First we distinguish binary Conds and switch Conds.
92 A binary Cond has as selector a boolean value. Proj(0) projects the control
93 flow for case "False", Proj(1) the control flow for "True". A binary Cond
94 is recognized by the boolean selector.
95 The switch Cond has as selector an unsigned integer. It produces as result
96 an n+1 Tuple (cf0, ... , cfn) of control flows.
97 We differ two flavours of this Cond. The first, the dense Cond, passes
98 control along output i if the selector value is i, 0 <= i <= n. If the
99 selector value is >n it passes control along output n.
100 The second Cond flavor differes in the treatment of cases not specified in
101 the source program. It magically knows about the existence of Proj nodes.
102 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
103 exists. Else it passes control along output n (even if this Proj does not
104 exist.) This Cond we call "fragmentary". There is a special constructor
105 new_defaultProj that automatically sets the flavor.
106 The two switch flavors are distinguished by a flag of type cond_kind.
107 Default flavor is "dense"
111 tv now implements Minus, Abs.
112 iropt now optimizes these and Div, Mod, Quot, DivMod.
113 Still missing: Shrs, Rot.
114 tarval_shr somtimes performs shrs, depending on the compiler/system!!
115 If the ArmRoq implementation is faulty there might appear errors.
118 Changed ircons: If undefined values are used the Phi construction
119 inserts a constant with value tarval_bad.
122 Changed array bounds in type.h to ir_node*. This allows to
123 construct array bounds that are complex constant expressions
124 simpler. Further dynamic array bounds can be displayed.
125 Comment in ircons.c extended: undefined values in start_block.
128 ifdef'ed all uses of gmp in tv.c away. Optimizations for
129 mode_Z no more supported, as well as constants of that mode.
132 Dokumentation in ir_dump
133 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
134 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
137 We need an entity for the array elements for the Sel nodes. This
138 entity should be stored in the array type. Changed constructor
139 parameters: include array element type. Entity for elements is built
144 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
147 Added list of member entites to union. unioned_types and delimiters
148 are superfluous now -- removed.
149 Rationale: we want to express selection of a union member as a Sel
150 node. for this we need to have entities. The entities contain the
151 unioned type and have as name the delimiters...
154 Changed Makefile/MakeTargets to install headers and libraries
158 Changed Makefile and Configure scripts to produce a proper tar file
159 for distribution (libfirm-VERSION.tar)
160 Use 'make distrib' instead of 'make dist'
163 Changed implementation of tr module. With this I also changed the
164 interface!! Type casts are unnecessary now, but some access funcions
168 ======================================================================
169 ==================== New version: 0.3.0 ==============================
170 ======================================================================
176 added creation of a tar archive for distribution
177 replaced ir/.dummy.in by ir/Makefile.in
180 Changed equivalent_node() and copy_preds() so that the end block
181 is not optimized away if it has no real predecessors. This fixes
182 the problem with the while examples.
183 Added while_example in Makefile
186 Fooled around with if_while_example: Why does cse make it abort?
187 Cse removes path to End node, Bad remains as pred of Endblock.
188 The block walker can't deal with this.
189 Made new example with only loop: while_example.
192 added auto documentation in Makefiles, configure, etc
193 example in ir/ir/ircons.c - much must be added
194 creation of documentation by 'make autodoc' in architecture directory
197 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
198 replaced some C++ style comments (//) by standard C comments /**/
201 - configure (with some features, see --help for more)
202 - make [depend | tags | install]
203 - make [run] in testprograms
205 - compilation on SunOS
207 - automatic call of autoconf if required
210 More colours in vcg output.
211 Fixed bug: cse found that start block equals it's
212 first successor as both have the Start block as predecessor.
213 This only happens for local_optimize_graph() as during construction
214 the Start block is not entered in the value table.
215 Changed implementation: irgmod: local_optimize_graph() did not
216 empty the hash table with the irnodes for cse. This might cause that
217 cse turns up with a node that seems better but was removed from the
218 graph in an earlier optimization phase.
219 Removed old #if 1 from ircons.c
220 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
221 Optimizes blocks that had bad predecessors.
226 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
227 Added a module deb_info in debug.h. Adapted makefile. Added example
229 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
231 Removed inabled code for dead node elimination in irgopt.h.
232 Renamed some missnamed access routines (_of_). Macros with old names
233 are in old_fctnames.h.
234 Edited makefiles to remove #* and *.flc.
237 Some minor bugfixes...
240 After compacting of in arrays in dead_node_elimination
241 merge blocks and remove Phis with one pred.
244 Freeing of obstack in dead_node_elimination commented in.
245 Compacting in arrays of Block and Phi nodes in dead_node_
250 added set/get_SymConst_type_or_id in irnode.h
251 added field offset to entity in entity.h
252 added field size to type_class in type.h
253 include "gmp.h" in tv.h with "" instead <>
256 Some changes to make the lib better portable
259 Initialize max_node_nr in irprog.
262 Now outputs warning if faulty type in irdump, dump_type_info.
263 Explicit string termination in irdump, vcg_open.
266 Added external to declaration of irp.
267 Added typedef before pns and pnc_number.
268 irmode.c, init_mode(): We need to memset all new modes as
269 tarval_vrfy reads fields before they are initialized: It
270 compares to min/max when tarvals for min/max are allocated!
273 Changed parameter of Methods in type.h and type.c from
274 class to clss. Class is a C++ keyword.
277 Changed some testprograms to accomodate Uebprakt.
280 Finished implementation of dump_all_types.
281 Added new testprogram inheritance_example.
284 Added seven access routines in type.[hc]:
285 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
286 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
287 Fixed the type_walk_2 for those seven routines.
290 Added irdump routine dump_all_types.
291 Did changes to irprog, type, typewalk to achieve this.
292 typewalk needs to walk along members, sub and supertypes, this
293 is still missing! irdump then needs to output these edges.
295 ======================================================================
296 ==================== New version: 0.2.5 ==============================
297 ======================================================================
300 Made new Version: 0.2.5
302 15.8.2000 Goetz until 3.9.00
303 Separated irnode.h and many others into two files: one public
305 Added funcionality to extract headers for lib.
308 type_dump also dumps irg->ent
309 if_example: corrected nr of locals
312 irgopt: Correct copy of self pointer in start block.
313 irgopt: Correct treatment of loops: pre function in walker
314 breaks all possible loops in Phi and Block nodes.
315 irr_loop_example: wrong Return statement
316 Now I fixed all but one error: in memory_example.
317 This error showed a conceptual problem, so I wrote
318 a slightly different algorithm. This now runs for
320 dead_node_example: cse is buggy!! merges start and the
324 looking at bug in dead_node_elimination.
326 irnode: all get_..._arr functions changed
327 ircons: new_r_Block: set matured flag.
328 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
329 adapted call_str_example to new concepts.
332 Implemented simpler Phi construction algorithm that constructs
333 correct code for three_cfpred_example in ircons. This algorithm
334 generates more Id nodes than the original algorithm and therefore
336 Also made some changes to optimizations of Not.
339 Fixed a bug, caused by the recursive use in type.h and entity.h.
340 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
341 Fixed a problem in if_while testprogram, so it now works.
344 Fixed bug in optimize(). Returned Null instead n if
345 get_optimize() == false.
348 Added some access routines in type.[hc]. Solved a recursive definition
349 of type_class struct, entity struct and type union.
352 Separated entity header into pure functional header and header
356 ... a bunch small changes not documented
359 Changed output of oo_prog_example: now uses the internal list
360 of all irgs. Had to implement some of the access routines for
361 that. Also fixed a bug in irdump. Main routines did not use
362 current_ir_graph properly.
365 Implemented some missing parts in irgopt.
366 Added field irg to entity. Only valid if entity is a method.
367 Had to resove a cyclic de[endency between irgraph.h and entity.h
369 Added fields sub and super to type_class for inheritance.
370 Added field main_irg to irprog.
373 Fixed some bugs in irgopt.c
374 Added some missing 'get_new_node' methods, so the new obstack contains
378 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
379 Solved some copy'n'paste problems. Deleted most debug-code!
380 Added comments to several files.
383 Fixed bug in _r_ constructors for all four Div operations.
384 Fixed bug in turn_into_tuple: didn't remember the block.
385 Tested transform_node.
388 Fixed some testprograms to new semantics of firm.
389 Added testprogram global_var_example.
390 Fixed a bug in irop: Size of Sel node was (entity *) instead of
391 sel_attr. Therefor array_heap_example aborted.
392 Also found a missing break in typewalk, case iro_Alloc.
393 Added a construct that unifies all things constructed by the lib
394 and needed to represent a program: irprog.ch
395 This contains a list of all types as well as a list of all ir graphs.
396 I added calls to initialization and constructors so that this is constructed
397 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
398 Removed strange block struct and constructor from ircons.c.
399 Moved routines for automatic Phi construction from irgmod to ircons.
400 Sorted functions in ircons to reflect the different interfaces.
401 Renamed dataseg to globals to be conformant with documentation.
402 Added conservation of current_ir_graph to irgopt.c.
403 Corrected bug in Makefiles: wrong path to directory ./inlude.
406 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
407 We should change the naming of the Block constructor.
408 Removed acces routines to attr. "closed" of Block.
409 Removed second implementation of new_ir_node from ircons and some comments
410 concerned with the now resolved cyclic dependency.
411 Fixed some bugs in irgopt so that the compilation goes through.
414 Changed the irnode attribut 'visit' into 'visited'.
415 Added some access functions, like get/set_irn_visit etc.
418 Renamed some access funtion in irgraph.*.
419 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
420 Added two attributes to the irgraph struct. The visited flags belongs
421 to a ir graph, not to a whole program.
424 A new optimization has been finished. The dead-node-elimination copies
425 the existing ir graph from one opstack to another. While walking the
426 graph, only the reachable nodes will be copied, so the "dead-nodes"
427 (unreachable in the controlflow) are removed.
430 Solved some problems in the 'copy_node' function. The in array was not
431 as easy as it seamed.
434 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
435 optimization, which is needed in the paramter list of 'irg_walk'.
438 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
439 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
443 Removed some files from the archive, after dependencies and usage are
445 - 'ir/common/strerror.c'
447 - 'ir/ident/xx_ident.h'
448 an empty file, only included by 'ident.c', but never used;
449 - 'ir/tv/label.c' and
451 contained a numeric counter;
452 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
453 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
454 In the old fiasco compiler, the label thing is used in the backend.
455 Search for 'babil' to see the usage.
456 Also removed the two attributes 'lab' and 'used' in the tarval struct.
459 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
460 afterwards some recursive includes, so libfirm works again.
463 Did a lot of changes, which I never commented until now (4.7.00).
465 * Added new result to Start node: Pointer to global data segment.
466 * Extended Semantics of SymConst node to represent information for the
468 * Added arithmeitc nodes (Shrs, Minus ...)
470 Rearranged the directory structure and adjusted the makefiles.
471 The directories contain:
472 ir: everything for the intermediate representation (better: src?)
473 /ir: the ir itself, and standard optimizations.
474 /tv: the target value module
475 /tr: the type and entity representation
476 /adt: abstract data types
477 /common: stuff needed by all other dirs
478 /debug: debugging Unterstuetzung
480 include: external files needen as includes
481 testprograms: examples to test the lib.
483 The makefiles generate files with extension .d that contain the dependencies
487 Added access routine to attribute link of irnode in irnode.ch.
488 Added get_negated_pnc to irnode.ch.
491 Added an iterator in iropt that calls the optimization for all nodes.
492 Copied optimize's code to optimize_in_place and removed deallocations.
493 Made set_irn_n in irnode.c public.
494 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
495 are allowded as cfgpredecessors to represent dead "incoming" control
497 Added call to optimize_in_place in mature_block. Is this useful?
500 Changed tests from comparing enums to comparing pointers. This is more
501 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
502 now get_irn_op == op_And
505 Compared equivalent_value to the one in the original fiasco.
506 Added a test in case iro_And.
507 Changed implementation of iro_Div. Added routines turn_into_tuple
508 and set_irn_op() in irgmod/irnode.
509 Changed implementation of irn_Minus (although commented out).
510 Now all features are ported or documented for this function.
513 Compared computed_value to the one in the original fiasco.
514 Added one further optimization in case iro_Proj.
515 Now all features are ported for this function.
518 Updated comments in ircons.h.
521 Changed possible attribute of SymConst from type_class to type.
522 SymConst size could be the size of a union, array, ...
525 Implemented two dumpers that dump type information and a graph with
529 Implemented a walker that walks over the type informatin that can
530 be reached from an ir node.
531 Added routine get_kind(firm_thing) in common.h, Added file common.c.
532 Added files typewalk.ch and routines to irdump.
533 Added visited flags and initialization to entity and all types.
534 Implemented some of the missing access routines in type.c, entity.c
537 Implemented constructor for ShrA.
539 Added routine that iterates the graph and verifies all nodes.
540 Added Phi_in stack to irgraph. This allows to build several
541 graphs at once with respect to the Phi building algorithm.
544 Implemented dumper for control flow graphs. Changed irr_* and dead_*
545 examples to dump cfg.
548 Implemeted explicit stack for the Phi node generation. See ircons.c.
551 added include string.h in xoprintf.c to get rid of warning:
552 implicit declaration of function `bcopy'
556 Added more cases to equivalent_node.
557 Portet gigo, identify, identify_remember.
558 The set/pset library can not handle several hash tables. At least,
559 compiling several procedures causes a segmentation fault during access
560 to the tables (oo_program_example). Need to work on this.
561 transform_node still needs to be ported.
562 some cases in equivalent_node are still missing.
564 To get it running I had to remove the call to optimize in the
565 new_Block constructor. It can only be called when the Block is
569 Introduced a walker that walks only over blocks. The asserts
570 might be too strict for general graphs, but so far it works.
571 For the walker I introduced an additional flag in the attribute
572 of Blocks, an a global block_visited variable (in irgraph.h).
573 Furhter I modularized dump_ir_node, implemented dump_ir_graph
574 with the existing walker, and added new routines to output a
576 Changed the examples to call the new dump routine.
579 Added auxiliary routines to ir_node:
580 skip_Proj, skip_Nop, is_Bad ...
581 Changed access routines to use get_irn_n instead of explicit array
582 accesses. Changed get_irn_n to call skip_Id, so that the access routines
583 never will return Id nodes.
586 Repaired Phi computation, changed new_r_Phi_in. Added test program to
587 test irregular controlflow.
590 Updated optimizations computed_value and equivalent_node to new
591 Syntax of FIRM nodes and to use access routines.
592 Added routine skip_Proj in irnode.
594 2.2.2000 Boris Boesler
595 Added files irgwalk.c and irgwalk.h. They include a simple function to
596 traverse an ir graph and execute pre and post functions to current node.
599 Added arrays with parameters and result types to the type informtion
600 of a procedure. This is needed for the code generation. Also added
601 the corresponding access routines.
602 Adapted the testprograms.
605 Found a bug / complication: the call order
606 get_value (makes Phi0, put's it into graph_arr)
607 set_value (overwrites Phi0 in graph_arr)
608 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
610 fails. Added test wether graph_arr is already set in phi_merge.
612 Added tons of comments to explain Phi generation -- the stack hack.
616 irdump now outputs the pnc_number for projs of Cmp nodes.
617 Added routine to access the pnc_string.
620 Added result "dataseg" to Start node, with all it's consequences.
621 We need this for the compiler lab to translate global variables.
622 Now they can be selected from the data segment, and the start
623 node supplies the pointer to this segment.
624 These changes are guarded by preprocessor variable UEBPRAKT in
626 Changed files: common.h, irgraph.ch, irnode.h
630 removed array_example, added array-heap_example and
631 array-stack_example and adapted makefile.
633 Entity now also allows type_method as owner. This is to model
634 the stack, Sel nodes that select a variable (array) from the
635 stack need an entity that describes what they select. This
636 entity gets the type of the enclosing procedure as owner.
639 Added future access routines in `irmode.[ch]' as comments,
640 that all attributes in the ir_mode struct can be user-defined.
641 Added access routines in `irgraph.[ch]', for all attributes.
644 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
645 Added `irvrfy.[ch]' to MAKEFILE
646 Added "inline" before access routines in `irnode.h', that no warnings
647 will appear furthermore.
648 Added three more access routines in `irmode.[ch]':
649 struct tarval *get_min_of_mode (ir_mode *mode);
650 struct tarval *get_max_of_mode (ir_mode *mode);
651 struct tarval *get_null_of_mode (ir_mode *mode);
654 Adaption of Alloc, Sel and Entity to new types:
655 Changed array_example to use type instead of type_class.
656 Changed entity to allow all types as owner instead of
657 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
658 Changed alloc to allow allocating variables of any type instead of
660 Adapted all testprograms to avoid warnings.
662 removed dtest ... from Makefile, replaced by test.
665 Added "run" to makefile, added array_example to makefile of testprograms.
666 Corrected testprogram array
667 Changed assert in irvrfy -- Conv.
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