3 Implemented code placement.
7 irdom implemented: dominator information.
10 Bugfix Optmierung Binops mit mode Tupel.
13 irgopt: inline_small_irgs implemented
16 Bugfixes, some access functions ...
19 New directory: ana for analyses. Adapted configure/makefiles
20 implemented irout: backedges. Added one field to ir_graph, one to ir_node.
21 Implemented state management for irgraphs: see irgraph.h.
22 Must now call finalize_cons() after graph construction!!
26 Flag pinned in irop, irgraph.
27 Global cse in irop, setting the irgraph flag.
28 Example programs: Endless_loop.c. global_cse.c.
32 Implemented support for endless loops:
34 Adapted Phi constructors so that memory phis are added.
35 Adapted Cond optimization: add block to End.
36 Adapted dead node elimination: compation of Ends predecessors
37 Adapted inlineing: remember keepalives of inlined graph.
38 Added informative strings to asserts in irvrfy.
41 Added volatile flag to entity, order flag to array.
42 Added a set of assertions.
45 Added access function set_class_members()
48 Asserts in irvrfy that verify the mode of Proj nodes. For Start,
49 Call, Return they check the corresponding function type! Corrected
51 Some asserts for legal values of 'pos' arguments in type/entity
55 Some access routines for visited flags in entity.h, irnode.h,
56 bug in oo_program_example.
59 Removed all obsolete Makefiles
62 Added support for constant entities. A new example program illustrates
63 their use. Extended dumper routines to dump constant values.
66 Extendend "comfortable" construction interface by some methods
67 serving as simple shortcuts.
70 Added a class type to irgs. This class type is to be used as owner
71 for local entities of the procedure. This are all entities allocated
72 for each execution of the procedure.
73 The class type is allocated automatically by new_ir_graph(). Access
74 routines to get this type are in irgraph.h.
75 We chose a class type as this allows to represent "inner" procedures
77 Adapted array-stack-example.
80 irdump outputs nodeids instead of pointers for labels of nodes.
81 With a preprocessor flag in common.h this can be turned off.
84 Added an Id tag to every .c and .h file
87 Changed SSA constuction for exception control flow.
88 If PRECISE_EXC_CONTEXT is used Phi nodes will use the values
89 valid when the execption operation was allocated. This increases
90 the memory consuption of the construction algorithm by
94 Added method to replace in array of a node in irnode.c/h
95 Added functionality to irgmod:
96 * collect all Phi nodes as link-list in the Blocks link field
97 * collect all Proj nodes as link-list in node producing the tuple.
98 * Seperate a Block into two
99 Added inlining transformation in irgopt.h
100 Improved output of dump_ir_block_graph. Now also dumps nodes that
101 don't belong to a block.
102 Added flag opt_unreachable_code, opt_inline.
103 Changed irvrfy so that it accepts nodes with Bad predecessors.
106 renamed get_type_nameid to get_type_ident
109 Bugfix: dead node elimination did not replace the hash table
113 Added routine remove_irp_irg.
114 Changed comment to free_ir_graph.
117 Added routine to free irgraphs.
120 Improved add routines to sub, supertype in type.c
123 Added implementation of overwrites stuff.
126 Implemented stuff to change the type graph. See
127 typegmod.h and tpop.h for basic documentation of the change.
128 There now exists a type of kind type_id. If this appears
129 externally this is a bug.
132 Added some new access routines to types.
133 List of overwritten fields for entities.
134 Removed a bug in irnode.
137 Added a routine to set the mangled entity name.
138 Added two routines to copy entites.
141 Entities now have two more flags, for visibility and allocation mode.
142 Types that have a layout have a flag indicating whether the layout is
146 We distinguish three kinds of Cond nodes. These can be distinguished
147 by the mode of the selector operand and an internal flag of type cond_kind.
148 First we distinguish binary Conds and switch Conds.
149 A binary Cond has as selector a boolean value. Proj(0) projects the control
150 flow for case "False", Proj(1) the control flow for "True". A binary Cond
151 is recognized by the boolean selector.
152 The switch Cond has as selector an unsigned integer. It produces as result
153 an n+1 Tuple (cf0, ... , cfn) of control flows.
154 We differ two flavours of this Cond. The first, the dense Cond, passes
155 control along output i if the selector value is i, 0 <= i <= n. If the
156 selector value is >n it passes control along output n.
157 The second Cond flavor differes in the treatment of cases not specified in
158 the source program. It magically knows about the existence of Proj nodes.
159 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
160 exists. Else it passes control along output n (even if this Proj does not
161 exist.) This Cond we call "fragmentary". There is a special constructor
162 new_defaultProj that automatically sets the flavor.
163 The two switch flavors are distinguished by a flag of type cond_kind.
164 Default flavor is "dense"
168 tv now implements Minus, Abs.
169 iropt now optimizes these and Div, Mod, Quot, DivMod.
170 Still missing: Shrs, Rot.
171 tarval_shr somtimes performs shrs, depending on the compiler/system!!
172 If the ArmRoq implementation is faulty there might appear errors.
175 Changed ircons: If undefined values are used the Phi construction
176 inserts a constant with value tarval_bad.
179 Changed array bounds in type.h to ir_node*. This allows to
180 construct array bounds that are complex constant expressions
181 simpler. Further dynamic array bounds can be displayed.
182 Comment in ircons.c extended: undefined values in start_block.
185 ifdef'ed all uses of gmp in tv.c away. Optimizations for
186 mode_Z no more supported, as well as constants of that mode.
189 Dokumentation in ir_dump
190 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
191 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
194 We need an entity for the array elements for the Sel nodes. This
195 entity should be stored in the array type. Changed constructor
196 parameters: include array element type. Entity for elements is built
201 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
204 Added list of member entites to union. unioned_types and delimiters
205 are superfluous now -- removed.
206 Rationale: we want to express selection of a union member as a Sel
207 node. for this we need to have entities. The entities contain the
208 unioned type and have as name the delimiters...
211 Changed Makefile/MakeTargets to install headers and libraries
215 Changed Makefile and Configure scripts to produce a proper tar file
216 for distribution (libfirm-VERSION.tar)
217 Use 'make distrib' instead of 'make dist'
220 Changed implementation of tr module. With this I also changed the
221 interface!! Type casts are unnecessary now, but some access funcions
225 ======================================================================
226 ==================== New version: 0.3.0 ==============================
227 ======================================================================
233 added creation of a tar archive for distribution
234 replaced ir/.dummy.in by ir/Makefile.in
237 Changed equivalent_node() and copy_preds() so that the end block
238 is not optimized away if it has no real predecessors. This fixes
239 the problem with the while examples.
240 Added while_example in Makefile
243 Fooled around with if_while_example: Why does cse make it abort?
244 Cse removes path to End node, Bad remains as pred of Endblock.
245 The block walker can't deal with this.
246 Made new example with only loop: while_example.
249 added auto documentation in Makefiles, configure, etc
250 example in ir/ir/ircons.c - much must be added
251 creation of documentation by 'make autodoc' in architecture directory
254 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
255 replaced some C++ style comments (//) by standard C comments /**/
258 - configure (with some features, see --help for more)
259 - make [depend | tags | install]
260 - make [run] in testprograms
262 - compilation on SunOS
264 - automatic call of autoconf if required
267 More colours in vcg output.
268 Fixed bug: cse found that start block equals it's
269 first successor as both have the Start block as predecessor.
270 This only happens for local_optimize_graph() as during construction
271 the Start block is not entered in the value table.
272 Changed implementation: irgmod: local_optimize_graph() did not
273 empty the hash table with the irnodes for cse. This might cause that
274 cse turns up with a node that seems better but was removed from the
275 graph in an earlier optimization phase.
276 Removed old #if 1 from ircons.c
277 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
278 Optimizes blocks that had bad predecessors.
283 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
284 Added a module deb_info in debug.h. Adapted makefile. Added example
286 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
288 Removed inabled code for dead node elimination in irgopt.h.
289 Renamed some missnamed access routines (_of_). Macros with old names
290 are in old_fctnames.h.
291 Edited makefiles to remove #* and *.flc.
294 Some minor bugfixes...
297 After compacting of in arrays in dead_node_elimination
298 merge blocks and remove Phis with one pred.
301 Freeing of obstack in dead_node_elimination commented in.
302 Compacting in arrays of Block and Phi nodes in dead_node_
307 added set/get_SymConst_type_or_id in irnode.h
308 added field offset to entity in entity.h
309 added field size to type_class in type.h
310 include "gmp.h" in tv.h with "" instead <>
313 Some changes to make the lib better portable
316 Initialize max_node_nr in irprog.
319 Now outputs warning if faulty type in irdump, dump_type_info.
320 Explicit string termination in irdump, vcg_open.
323 Added external to declaration of irp.
324 Added typedef before pns and pnc_number.
325 irmode.c, init_mode(): We need to memset all new modes as
326 tarval_vrfy reads fields before they are initialized: It
327 compares to min/max when tarvals for min/max are allocated!
330 Changed parameter of Methods in type.h and type.c from
331 class to clss. Class is a C++ keyword.
334 Changed some testprograms to accomodate Uebprakt.
337 Finished implementation of dump_all_types.
338 Added new testprogram inheritance_example.
341 Added seven access routines in type.[hc]:
342 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
343 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
344 Fixed the type_walk_2 for those seven routines.
347 Added irdump routine dump_all_types.
348 Did changes to irprog, type, typewalk to achieve this.
349 typewalk needs to walk along members, sub and supertypes, this
350 is still missing! irdump then needs to output these edges.
352 ======================================================================
353 ==================== New version: 0.2.5 ==============================
354 ======================================================================
357 Made new Version: 0.2.5
359 15.8.2000 Goetz until 3.9.00
360 Separated irnode.h and many others into two files: one public
362 Added funcionality to extract headers for lib.
365 type_dump also dumps irg->ent
366 if_example: corrected nr of locals
369 irgopt: Correct copy of self pointer in start block.
370 irgopt: Correct treatment of loops: pre function in walker
371 breaks all possible loops in Phi and Block nodes.
372 irr_loop_example: wrong Return statement
373 Now I fixed all but one error: in memory_example.
374 This error showed a conceptual problem, so I wrote
375 a slightly different algorithm. This now runs for
377 dead_node_example: cse is buggy!! merges start and the
381 looking at bug in dead_node_elimination.
383 irnode: all get_..._arr functions changed
384 ircons: new_r_Block: set matured flag.
385 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
386 adapted call_str_example to new concepts.
389 Implemented simpler Phi construction algorithm that constructs
390 correct code for three_cfpred_example in ircons. This algorithm
391 generates more Id nodes than the original algorithm and therefore
393 Also made some changes to optimizations of Not.
396 Fixed a bug, caused by the recursive use in type.h and entity.h.
397 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
398 Fixed a problem in if_while testprogram, so it now works.
401 Fixed bug in optimize(). Returned Null instead n if
402 get_optimize() == false.
405 Added some access routines in type.[hc]. Solved a recursive definition
406 of type_class struct, entity struct and type union.
409 Separated entity header into pure functional header and header
413 ... a bunch small changes not documented
416 Changed output of oo_prog_example: now uses the internal list
417 of all irgs. Had to implement some of the access routines for
418 that. Also fixed a bug in irdump. Main routines did not use
419 current_ir_graph properly.
422 Implemented some missing parts in irgopt.
423 Added field irg to entity. Only valid if entity is a method.
424 Had to resove a cyclic de[endency between irgraph.h and entity.h
426 Added fields sub and super to type_class for inheritance.
427 Added field main_irg to irprog.
430 Fixed some bugs in irgopt.c
431 Added some missing 'get_new_node' methods, so the new obstack contains
435 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
436 Solved some copy'n'paste problems. Deleted most debug-code!
437 Added comments to several files.
440 Fixed bug in _r_ constructors for all four Div operations.
441 Fixed bug in turn_into_tuple: didn't remember the block.
442 Tested transform_node.
445 Fixed some testprograms to new semantics of firm.
446 Added testprogram global_var_example.
447 Fixed a bug in irop: Size of Sel node was (entity *) instead of
448 sel_attr. Therefor array_heap_example aborted.
449 Also found a missing break in typewalk, case iro_Alloc.
450 Added a construct that unifies all things constructed by the lib
451 and needed to represent a program: irprog.ch
452 This contains a list of all types as well as a list of all ir graphs.
453 I added calls to initialization and constructors so that this is constructed
454 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
455 Removed strange block struct and constructor from ircons.c.
456 Moved routines for automatic Phi construction from irgmod to ircons.
457 Sorted functions in ircons to reflect the different interfaces.
458 Renamed dataseg to globals to be conformant with documentation.
459 Added conservation of current_ir_graph to irgopt.c.
460 Corrected bug in Makefiles: wrong path to directory ./inlude.
463 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
464 We should change the naming of the Block constructor.
465 Removed acces routines to attr. "closed" of Block.
466 Removed second implementation of new_ir_node from ircons and some comments
467 concerned with the now resolved cyclic dependency.
468 Fixed some bugs in irgopt so that the compilation goes through.
471 Changed the irnode attribut 'visit' into 'visited'.
472 Added some access functions, like get/set_irn_visit etc.
475 Renamed some access funtion in irgraph.*.
476 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
477 Added two attributes to the irgraph struct. The visited flags belongs
478 to a ir graph, not to a whole program.
481 A new optimization has been finished. The dead-node-elimination copies
482 the existing ir graph from one opstack to another. While walking the
483 graph, only the reachable nodes will be copied, so the "dead-nodes"
484 (unreachable in the controlflow) are removed.
487 Solved some problems in the 'copy_node' function. The in array was not
488 as easy as it seamed.
491 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
492 optimization, which is needed in the paramter list of 'irg_walk'.
495 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
496 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
500 Removed some files from the archive, after dependencies and usage are
502 - 'ir/common/strerror.c'
504 - 'ir/ident/xx_ident.h'
505 an empty file, only included by 'ident.c', but never used;
506 - 'ir/tv/label.c' and
508 contained a numeric counter;
509 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
510 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
511 In the old fiasco compiler, the label thing is used in the backend.
512 Search for 'babil' to see the usage.
513 Also removed the two attributes 'lab' and 'used' in the tarval struct.
516 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
517 afterwards some recursive includes, so libfirm works again.
520 Did a lot of changes, which I never commented until now (4.7.00).
522 * Added new result to Start node: Pointer to global data segment.
523 * Extended Semantics of SymConst node to represent information for the
525 * Added arithmeitc nodes (Shrs, Minus ...)
527 Rearranged the directory structure and adjusted the makefiles.
528 The directories contain:
529 ir: everything for the intermediate representation (better: src?)
530 /ir: the ir itself, and standard optimizations.
531 /tv: the target value module
532 /tr: the type and entity representation
533 /adt: abstract data types
534 /common: stuff needed by all other dirs
535 /debug: debugging Unterstuetzung
537 include: external files needen as includes
538 testprograms: examples to test the lib.
540 The makefiles generate files with extension .d that contain the dependencies
544 Added access routine to attribute link of irnode in irnode.ch.
545 Added get_negated_pnc to irnode.ch.
548 Added an iterator in iropt that calls the optimization for all nodes.
549 Copied optimize's code to optimize_in_place and removed deallocations.
550 Made set_irn_n in irnode.c public.
551 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
552 are allowded as cfgpredecessors to represent dead "incoming" control
554 Added call to optimize_in_place in mature_block. Is this useful?
557 Changed tests from comparing enums to comparing pointers. This is more
558 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
559 now get_irn_op == op_And
562 Compared equivalent_value to the one in the original fiasco.
563 Added a test in case iro_And.
564 Changed implementation of iro_Div. Added routines turn_into_tuple
565 and set_irn_op() in irgmod/irnode.
566 Changed implementation of irn_Minus (although commented out).
567 Now all features are ported or documented for this function.
570 Compared computed_value to the one in the original fiasco.
571 Added one further optimization in case iro_Proj.
572 Now all features are ported for this function.
575 Updated comments in ircons.h.
578 Changed possible attribute of SymConst from type_class to type.
579 SymConst size could be the size of a union, array, ...
582 Implemented two dumpers that dump type information and a graph with
586 Implemented a walker that walks over the type informatin that can
587 be reached from an ir node.
588 Added routine get_kind(firm_thing) in common.h, Added file common.c.
589 Added files typewalk.ch and routines to irdump.
590 Added visited flags and initialization to entity and all types.
591 Implemented some of the missing access routines in type.c, entity.c
594 Implemented constructor for ShrA.
596 Added routine that iterates the graph and verifies all nodes.
597 Added Phi_in stack to irgraph. This allows to build several
598 graphs at once with respect to the Phi building algorithm.
601 Implemented dumper for control flow graphs. Changed irr_* and dead_*
602 examples to dump cfg.
605 Implemeted explicit stack for the Phi node generation. See ircons.c.
608 added include string.h in xoprintf.c to get rid of warning:
609 implicit declaration of function `bcopy'
613 Added more cases to equivalent_node.
614 Portet gigo, identify, identify_remember.
615 The set/pset library can not handle several hash tables. At least,
616 compiling several procedures causes a segmentation fault during access
617 to the tables (oo_program_example). Need to work on this.
618 transform_node still needs to be ported.
619 some cases in equivalent_node are still missing.
621 To get it running I had to remove the call to optimize in the
622 new_Block constructor. It can only be called when the Block is
626 Introduced a walker that walks only over blocks. The asserts
627 might be too strict for general graphs, but so far it works.
628 For the walker I introduced an additional flag in the attribute
629 of Blocks, an a global block_visited variable (in irgraph.h).
630 Furhter I modularized dump_ir_node, implemented dump_ir_graph
631 with the existing walker, and added new routines to output a
633 Changed the examples to call the new dump routine.
636 Added auxiliary routines to ir_node:
637 skip_Proj, skip_Nop, is_Bad ...
638 Changed access routines to use get_irn_n instead of explicit array
639 accesses. Changed get_irn_n to call skip_Id, so that the access routines
640 never will return Id nodes.
643 Repaired Phi computation, changed new_r_Phi_in. Added test program to
644 test irregular controlflow.
647 Updated optimizations computed_value and equivalent_node to new
648 Syntax of FIRM nodes and to use access routines.
649 Added routine skip_Proj in irnode.
651 2.2.2000 Boris Boesler
652 Added files irgwalk.c and irgwalk.h. They include a simple function to
653 traverse an ir graph and execute pre and post functions to current node.
656 Added arrays with parameters and result types to the type informtion
657 of a procedure. This is needed for the code generation. Also added
658 the corresponding access routines.
659 Adapted the testprograms.
662 Found a bug / complication: the call order
663 get_value (makes Phi0, put's it into graph_arr)
664 set_value (overwrites Phi0 in graph_arr)
665 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
667 fails. Added test wether graph_arr is already set in phi_merge.
669 Added tons of comments to explain Phi generation -- the stack hack.
673 irdump now outputs the pnc_number for projs of Cmp nodes.
674 Added routine to access the pnc_string.
677 Added result "dataseg" to Start node, with all it's consequences.
678 We need this for the compiler lab to translate global variables.
679 Now they can be selected from the data segment, and the start
680 node supplies the pointer to this segment.
681 These changes are guarded by preprocessor variable UEBPRAKT in
683 Changed files: common.h, irgraph.ch, irnode.h
687 removed array_example, added array-heap_example and
688 array-stack_example and adapted makefile.
690 Entity now also allows type_method as owner. This is to model
691 the stack, Sel nodes that select a variable (array) from the
692 stack need an entity that describes what they select. This
693 entity gets the type of the enclosing procedure as owner.
696 Added future access routines in `irmode.[ch]' as comments,
697 that all attributes in the ir_mode struct can be user-defined.
698 Added access routines in `irgraph.[ch]', for all attributes.
701 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
702 Added `irvrfy.[ch]' to MAKEFILE
703 Added "inline" before access routines in `irnode.h', that no warnings
704 will appear furthermore.
705 Added three more access routines in `irmode.[ch]':
706 struct tarval *get_min_of_mode (ir_mode *mode);
707 struct tarval *get_max_of_mode (ir_mode *mode);
708 struct tarval *get_null_of_mode (ir_mode *mode);
711 Adaption of Alloc, Sel and Entity to new types:
712 Changed array_example to use type instead of type_class.
713 Changed entity to allow all types as owner instead of
714 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
715 Changed alloc to allow allocating variables of any type instead of
717 Adapted all testprograms to avoid warnings.
719 removed dtest ... from Makefile, replaced by test.
722 Added "run" to makefile, added array_example to makefile of testprograms.
723 Corrected testprogram array
724 Changed assert in irvrfy -- Conv.
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