2 Implemented cf optimizations.
3 Checked compiler flags -- sorted better to fit optimizations.
7 Implemented code placement.
11 irdom implemented: dominator information.
14 Bugfix Optmierung Binops mit mode Tupel.
17 irgopt: inline_small_irgs implemented
20 Bugfixes, some access functions ...
23 New directory: ana for analyses. Adapted configure/makefiles
24 implemented irout: backedges. Added one field to ir_graph, one to ir_node.
25 Implemented state management for irgraphs: see irgraph.h.
26 Must now call finalize_cons() after graph construction!!
30 Flag pinned in irop, irgraph.
31 Global cse in irop, setting the irgraph flag.
32 Example programs: Endless_loop.c. global_cse.c.
36 Implemented support for endless loops:
38 Adapted Phi constructors so that memory phis are added.
39 Adapted Cond optimization: add block to End.
40 Adapted dead node elimination: compation of Ends predecessors
41 Adapted inlineing: remember keepalives of inlined graph.
42 Added informative strings to asserts in irvrfy.
45 Added volatile flag to entity, order flag to array.
46 Added a set of assertions.
49 Added access function set_class_members()
52 Asserts in irvrfy that verify the mode of Proj nodes. For Start,
53 Call, Return they check the corresponding function type! Corrected
55 Some asserts for legal values of 'pos' arguments in type/entity
59 Some access routines for visited flags in entity.h, irnode.h,
60 bug in oo_program_example.
63 Removed all obsolete Makefiles
66 Added support for constant entities. A new example program illustrates
67 their use. Extended dumper routines to dump constant values.
70 Extendend "comfortable" construction interface by some methods
71 serving as simple shortcuts.
74 Added a class type to irgs. This class type is to be used as owner
75 for local entities of the procedure. This are all entities allocated
76 for each execution of the procedure.
77 The class type is allocated automatically by new_ir_graph(). Access
78 routines to get this type are in irgraph.h.
79 We chose a class type as this allows to represent "inner" procedures
81 Adapted array-stack-example.
84 irdump outputs nodeids instead of pointers for labels of nodes.
85 With a preprocessor flag in common.h this can be turned off.
88 Added an Id tag to every .c and .h file
91 Changed SSA constuction for exception control flow.
92 If PRECISE_EXC_CONTEXT is used Phi nodes will use the values
93 valid when the execption operation was allocated. This increases
94 the memory consuption of the construction algorithm by
98 Added method to replace in array of a node in irnode.c/h
99 Added functionality to irgmod:
100 * collect all Phi nodes as link-list in the Blocks link field
101 * collect all Proj nodes as link-list in node producing the tuple.
102 * Seperate a Block into two
103 Added inlining transformation in irgopt.h
104 Improved output of dump_ir_block_graph. Now also dumps nodes that
105 don't belong to a block.
106 Added flag opt_unreachable_code, opt_inline.
107 Changed irvrfy so that it accepts nodes with Bad predecessors.
110 renamed get_type_nameid to get_type_ident
113 Bugfix: dead node elimination did not replace the hash table
117 Added routine remove_irp_irg.
118 Changed comment to free_ir_graph.
121 Added routine to free irgraphs.
124 Improved add routines to sub, supertype in type.c
127 Added implementation of overwrites stuff.
130 Implemented stuff to change the type graph. See
131 typegmod.h and tpop.h for basic documentation of the change.
132 There now exists a type of kind type_id. If this appears
133 externally this is a bug.
136 Added some new access routines to types.
137 List of overwritten fields for entities.
138 Removed a bug in irnode.
141 Added a routine to set the mangled entity name.
142 Added two routines to copy entites.
145 Entities now have two more flags, for visibility and allocation mode.
146 Types that have a layout have a flag indicating whether the layout is
150 We distinguish three kinds of Cond nodes. These can be distinguished
151 by the mode of the selector operand and an internal flag of type cond_kind.
152 First we distinguish binary Conds and switch Conds.
153 A binary Cond has as selector a boolean value. Proj(0) projects the control
154 flow for case "False", Proj(1) the control flow for "True". A binary Cond
155 is recognized by the boolean selector.
156 The switch Cond has as selector an unsigned integer. It produces as result
157 an n+1 Tuple (cf0, ... , cfn) of control flows.
158 We differ two flavours of this Cond. The first, the dense Cond, passes
159 control along output i if the selector value is i, 0 <= i <= n. If the
160 selector value is >n it passes control along output n.
161 The second Cond flavor differes in the treatment of cases not specified in
162 the source program. It magically knows about the existence of Proj nodes.
163 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
164 exists. Else it passes control along output n (even if this Proj does not
165 exist.) This Cond we call "fragmentary". There is a special constructor
166 new_defaultProj that automatically sets the flavor.
167 The two switch flavors are distinguished by a flag of type cond_kind.
168 Default flavor is "dense"
172 tv now implements Minus, Abs.
173 iropt now optimizes these and Div, Mod, Quot, DivMod.
174 Still missing: Shrs, Rot.
175 tarval_shr somtimes performs shrs, depending on the compiler/system!!
176 If the ArmRoq implementation is faulty there might appear errors.
179 Changed ircons: If undefined values are used the Phi construction
180 inserts a constant with value tarval_bad.
183 Changed array bounds in type.h to ir_node*. This allows to
184 construct array bounds that are complex constant expressions
185 simpler. Further dynamic array bounds can be displayed.
186 Comment in ircons.c extended: undefined values in start_block.
189 ifdef'ed all uses of gmp in tv.c away. Optimizations for
190 mode_Z no more supported, as well as constants of that mode.
193 Dokumentation in ir_dump
194 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
195 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
198 We need an entity for the array elements for the Sel nodes. This
199 entity should be stored in the array type. Changed constructor
200 parameters: include array element type. Entity for elements is built
205 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
208 Added list of member entites to union. unioned_types and delimiters
209 are superfluous now -- removed.
210 Rationale: we want to express selection of a union member as a Sel
211 node. for this we need to have entities. The entities contain the
212 unioned type and have as name the delimiters...
215 Changed Makefile/MakeTargets to install headers and libraries
219 Changed Makefile and Configure scripts to produce a proper tar file
220 for distribution (libfirm-VERSION.tar)
221 Use 'make distrib' instead of 'make dist'
224 Changed implementation of tr module. With this I also changed the
225 interface!! Type casts are unnecessary now, but some access funcions
229 ======================================================================
230 ==================== New version: 0.3.0 ==============================
231 ======================================================================
237 added creation of a tar archive for distribution
238 replaced ir/.dummy.in by ir/Makefile.in
241 Changed equivalent_node() and copy_preds() so that the end block
242 is not optimized away if it has no real predecessors. This fixes
243 the problem with the while examples.
244 Added while_example in Makefile
247 Fooled around with if_while_example: Why does cse make it abort?
248 Cse removes path to End node, Bad remains as pred of Endblock.
249 The block walker can't deal with this.
250 Made new example with only loop: while_example.
253 added auto documentation in Makefiles, configure, etc
254 example in ir/ir/ircons.c - much must be added
255 creation of documentation by 'make autodoc' in architecture directory
258 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
259 replaced some C++ style comments (//) by standard C comments /**/
262 - configure (with some features, see --help for more)
263 - make [depend | tags | install]
264 - make [run] in testprograms
266 - compilation on SunOS
268 - automatic call of autoconf if required
271 More colours in vcg output.
272 Fixed bug: cse found that start block equals it's
273 first successor as both have the Start block as predecessor.
274 This only happens for local_optimize_graph() as during construction
275 the Start block is not entered in the value table.
276 Changed implementation: irgmod: local_optimize_graph() did not
277 empty the hash table with the irnodes for cse. This might cause that
278 cse turns up with a node that seems better but was removed from the
279 graph in an earlier optimization phase.
280 Removed old #if 1 from ircons.c
281 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
282 Optimizes blocks that had bad predecessors.
287 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
288 Added a module deb_info in debug.h. Adapted makefile. Added example
290 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
292 Removed inabled code for dead node elimination in irgopt.h.
293 Renamed some missnamed access routines (_of_). Macros with old names
294 are in old_fctnames.h.
295 Edited makefiles to remove #* and *.flc.
298 Some minor bugfixes...
301 After compacting of in arrays in dead_node_elimination
302 merge blocks and remove Phis with one pred.
305 Freeing of obstack in dead_node_elimination commented in.
306 Compacting in arrays of Block and Phi nodes in dead_node_
311 added set/get_SymConst_type_or_id in irnode.h
312 added field offset to entity in entity.h
313 added field size to type_class in type.h
314 include "gmp.h" in tv.h with "" instead <>
317 Some changes to make the lib better portable
320 Initialize max_node_nr in irprog.
323 Now outputs warning if faulty type in irdump, dump_type_info.
324 Explicit string termination in irdump, vcg_open.
327 Added external to declaration of irp.
328 Added typedef before pns and pnc_number.
329 irmode.c, init_mode(): We need to memset all new modes as
330 tarval_vrfy reads fields before they are initialized: It
331 compares to min/max when tarvals for min/max are allocated!
334 Changed parameter of Methods in type.h and type.c from
335 class to clss. Class is a C++ keyword.
338 Changed some testprograms to accomodate Uebprakt.
341 Finished implementation of dump_all_types.
342 Added new testprogram inheritance_example.
345 Added seven access routines in type.[hc]:
346 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
347 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
348 Fixed the type_walk_2 for those seven routines.
351 Added irdump routine dump_all_types.
352 Did changes to irprog, type, typewalk to achieve this.
353 typewalk needs to walk along members, sub and supertypes, this
354 is still missing! irdump then needs to output these edges.
356 ======================================================================
357 ==================== New version: 0.2.5 ==============================
358 ======================================================================
361 Made new Version: 0.2.5
363 15.8.2000 Goetz until 3.9.00
364 Separated irnode.h and many others into two files: one public
366 Added funcionality to extract headers for lib.
369 type_dump also dumps irg->ent
370 if_example: corrected nr of locals
373 irgopt: Correct copy of self pointer in start block.
374 irgopt: Correct treatment of loops: pre function in walker
375 breaks all possible loops in Phi and Block nodes.
376 irr_loop_example: wrong Return statement
377 Now I fixed all but one error: in memory_example.
378 This error showed a conceptual problem, so I wrote
379 a slightly different algorithm. This now runs for
381 dead_node_example: cse is buggy!! merges start and the
385 looking at bug in dead_node_elimination.
387 irnode: all get_..._arr functions changed
388 ircons: new_r_Block: set matured flag.
389 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
390 adapted call_str_example to new concepts.
393 Implemented simpler Phi construction algorithm that constructs
394 correct code for three_cfpred_example in ircons. This algorithm
395 generates more Id nodes than the original algorithm and therefore
397 Also made some changes to optimizations of Not.
400 Fixed a bug, caused by the recursive use in type.h and entity.h.
401 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
402 Fixed a problem in if_while testprogram, so it now works.
405 Fixed bug in optimize(). Returned Null instead n if
406 get_optimize() == false.
409 Added some access routines in type.[hc]. Solved a recursive definition
410 of type_class struct, entity struct and type union.
413 Separated entity header into pure functional header and header
417 ... a bunch small changes not documented
420 Changed output of oo_prog_example: now uses the internal list
421 of all irgs. Had to implement some of the access routines for
422 that. Also fixed a bug in irdump. Main routines did not use
423 current_ir_graph properly.
426 Implemented some missing parts in irgopt.
427 Added field irg to entity. Only valid if entity is a method.
428 Had to resove a cyclic de[endency between irgraph.h and entity.h
430 Added fields sub and super to type_class for inheritance.
431 Added field main_irg to irprog.
434 Fixed some bugs in irgopt.c
435 Added some missing 'get_new_node' methods, so the new obstack contains
439 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
440 Solved some copy'n'paste problems. Deleted most debug-code!
441 Added comments to several files.
444 Fixed bug in _r_ constructors for all four Div operations.
445 Fixed bug in turn_into_tuple: didn't remember the block.
446 Tested transform_node.
449 Fixed some testprograms to new semantics of firm.
450 Added testprogram global_var_example.
451 Fixed a bug in irop: Size of Sel node was (entity *) instead of
452 sel_attr. Therefor array_heap_example aborted.
453 Also found a missing break in typewalk, case iro_Alloc.
454 Added a construct that unifies all things constructed by the lib
455 and needed to represent a program: irprog.ch
456 This contains a list of all types as well as a list of all ir graphs.
457 I added calls to initialization and constructors so that this is constructed
458 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
459 Removed strange block struct and constructor from ircons.c.
460 Moved routines for automatic Phi construction from irgmod to ircons.
461 Sorted functions in ircons to reflect the different interfaces.
462 Renamed dataseg to globals to be conformant with documentation.
463 Added conservation of current_ir_graph to irgopt.c.
464 Corrected bug in Makefiles: wrong path to directory ./inlude.
467 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
468 We should change the naming of the Block constructor.
469 Removed acces routines to attr. "closed" of Block.
470 Removed second implementation of new_ir_node from ircons and some comments
471 concerned with the now resolved cyclic dependency.
472 Fixed some bugs in irgopt so that the compilation goes through.
475 Changed the irnode attribut 'visit' into 'visited'.
476 Added some access functions, like get/set_irn_visit etc.
479 Renamed some access funtion in irgraph.*.
480 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
481 Added two attributes to the irgraph struct. The visited flags belongs
482 to a ir graph, not to a whole program.
485 A new optimization has been finished. The dead-node-elimination copies
486 the existing ir graph from one opstack to another. While walking the
487 graph, only the reachable nodes will be copied, so the "dead-nodes"
488 (unreachable in the controlflow) are removed.
491 Solved some problems in the 'copy_node' function. The in array was not
492 as easy as it seamed.
495 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
496 optimization, which is needed in the paramter list of 'irg_walk'.
499 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
500 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
504 Removed some files from the archive, after dependencies and usage are
506 - 'ir/common/strerror.c'
508 - 'ir/ident/xx_ident.h'
509 an empty file, only included by 'ident.c', but never used;
510 - 'ir/tv/label.c' and
512 contained a numeric counter;
513 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
514 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
515 In the old fiasco compiler, the label thing is used in the backend.
516 Search for 'babil' to see the usage.
517 Also removed the two attributes 'lab' and 'used' in the tarval struct.
520 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
521 afterwards some recursive includes, so libfirm works again.
524 Did a lot of changes, which I never commented until now (4.7.00).
526 * Added new result to Start node: Pointer to global data segment.
527 * Extended Semantics of SymConst node to represent information for the
529 * Added arithmeitc nodes (Shrs, Minus ...)
531 Rearranged the directory structure and adjusted the makefiles.
532 The directories contain:
533 ir: everything for the intermediate representation (better: src?)
534 /ir: the ir itself, and standard optimizations.
535 /tv: the target value module
536 /tr: the type and entity representation
537 /adt: abstract data types
538 /common: stuff needed by all other dirs
539 /debug: debugging Unterstuetzung
541 include: external files needen as includes
542 testprograms: examples to test the lib.
544 The makefiles generate files with extension .d that contain the dependencies
548 Added access routine to attribute link of irnode in irnode.ch.
549 Added get_negated_pnc to irnode.ch.
552 Added an iterator in iropt that calls the optimization for all nodes.
553 Copied optimize's code to optimize_in_place and removed deallocations.
554 Made set_irn_n in irnode.c public.
555 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
556 are allowded as cfgpredecessors to represent dead "incoming" control
558 Added call to optimize_in_place in mature_block. Is this useful?
561 Changed tests from comparing enums to comparing pointers. This is more
562 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
563 now get_irn_op == op_And
566 Compared equivalent_value to the one in the original fiasco.
567 Added a test in case iro_And.
568 Changed implementation of iro_Div. Added routines turn_into_tuple
569 and set_irn_op() in irgmod/irnode.
570 Changed implementation of irn_Minus (although commented out).
571 Now all features are ported or documented for this function.
574 Compared computed_value to the one in the original fiasco.
575 Added one further optimization in case iro_Proj.
576 Now all features are ported for this function.
579 Updated comments in ircons.h.
582 Changed possible attribute of SymConst from type_class to type.
583 SymConst size could be the size of a union, array, ...
586 Implemented two dumpers that dump type information and a graph with
590 Implemented a walker that walks over the type informatin that can
591 be reached from an ir node.
592 Added routine get_kind(firm_thing) in common.h, Added file common.c.
593 Added files typewalk.ch and routines to irdump.
594 Added visited flags and initialization to entity and all types.
595 Implemented some of the missing access routines in type.c, entity.c
598 Implemented constructor for ShrA.
600 Added routine that iterates the graph and verifies all nodes.
601 Added Phi_in stack to irgraph. This allows to build several
602 graphs at once with respect to the Phi building algorithm.
605 Implemented dumper for control flow graphs. Changed irr_* and dead_*
606 examples to dump cfg.
609 Implemeted explicit stack for the Phi node generation. See ircons.c.
612 added include string.h in xoprintf.c to get rid of warning:
613 implicit declaration of function `bcopy'
617 Added more cases to equivalent_node.
618 Portet gigo, identify, identify_remember.
619 The set/pset library can not handle several hash tables. At least,
620 compiling several procedures causes a segmentation fault during access
621 to the tables (oo_program_example). Need to work on this.
622 transform_node still needs to be ported.
623 some cases in equivalent_node are still missing.
625 To get it running I had to remove the call to optimize in the
626 new_Block constructor. It can only be called when the Block is
630 Introduced a walker that walks only over blocks. The asserts
631 might be too strict for general graphs, but so far it works.
632 For the walker I introduced an additional flag in the attribute
633 of Blocks, an a global block_visited variable (in irgraph.h).
634 Furhter I modularized dump_ir_node, implemented dump_ir_graph
635 with the existing walker, and added new routines to output a
637 Changed the examples to call the new dump routine.
640 Added auxiliary routines to ir_node:
641 skip_Proj, skip_Nop, is_Bad ...
642 Changed access routines to use get_irn_n instead of explicit array
643 accesses. Changed get_irn_n to call skip_Id, so that the access routines
644 never will return Id nodes.
647 Repaired Phi computation, changed new_r_Phi_in. Added test program to
648 test irregular controlflow.
651 Updated optimizations computed_value and equivalent_node to new
652 Syntax of FIRM nodes and to use access routines.
653 Added routine skip_Proj in irnode.
655 2.2.2000 Boris Boesler
656 Added files irgwalk.c and irgwalk.h. They include a simple function to
657 traverse an ir graph and execute pre and post functions to current node.
660 Added arrays with parameters and result types to the type informtion
661 of a procedure. This is needed for the code generation. Also added
662 the corresponding access routines.
663 Adapted the testprograms.
666 Found a bug / complication: the call order
667 get_value (makes Phi0, put's it into graph_arr)
668 set_value (overwrites Phi0 in graph_arr)
669 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
671 fails. Added test wether graph_arr is already set in phi_merge.
673 Added tons of comments to explain Phi generation -- the stack hack.
677 irdump now outputs the pnc_number for projs of Cmp nodes.
678 Added routine to access the pnc_string.
681 Added result "dataseg" to Start node, with all it's consequences.
682 We need this for the compiler lab to translate global variables.
683 Now they can be selected from the data segment, and the start
684 node supplies the pointer to this segment.
685 These changes are guarded by preprocessor variable UEBPRAKT in
687 Changed files: common.h, irgraph.ch, irnode.h
691 removed array_example, added array-heap_example and
692 array-stack_example and adapted makefile.
694 Entity now also allows type_method as owner. This is to model
695 the stack, Sel nodes that select a variable (array) from the
696 stack need an entity that describes what they select. This
697 entity gets the type of the enclosing procedure as owner.
700 Added future access routines in `irmode.[ch]' as comments,
701 that all attributes in the ir_mode struct can be user-defined.
702 Added access routines in `irgraph.[ch]', for all attributes.
705 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
706 Added `irvrfy.[ch]' to MAKEFILE
707 Added "inline" before access routines in `irnode.h', that no warnings
708 will appear furthermore.
709 Added three more access routines in `irmode.[ch]':
710 struct tarval *get_min_of_mode (ir_mode *mode);
711 struct tarval *get_max_of_mode (ir_mode *mode);
712 struct tarval *get_null_of_mode (ir_mode *mode);
715 Adaption of Alloc, Sel and Entity to new types:
716 Changed array_example to use type instead of type_class.
717 Changed entity to allow all types as owner instead of
718 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
719 Changed alloc to allow allocating variables of any type instead of
721 Adapted all testprograms to avoid warnings.
723 removed dtest ... from Makefile, replaced by test.
726 Added "run" to makefile, added array_example to makefile of testprograms.
727 Corrected testprogram array
728 Changed assert in irvrfy -- Conv.
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