3 Added an Id tag to every .c and .h file
6 Changed SSA constuction for exception control flow.
7 If PRECISE_EXC_CONTEXT is used Phi nodes will use the values
8 valid when the execption operation was allocated. This increases
9 the memory consuption of the construction algorithm by
13 Added method to replace in array of a node in irnode.c/h
14 Added functionality to irgmod:
15 * collect all Phi nodes as link-list in the Blocks link field
16 * collect all Proj nodes as link-list in node producing the tuple.
17 * Seperate a Block into two
18 Added inlining transformation in irgopt.h
19 Improved output of dump_ir_block_graph. Now also dumps nodes that
20 don't belong to a block.
21 Added flag opt_unreachable_code, opt_inline.
22 Changed irvrfy so that it accepts nodes with Bad predecessors.
25 renamed get_type_nameid to get_type_ident
28 Bugfix: dead node elimination did not replace the hash table
32 Added routine remove_irp_irg.
33 Changed comment to free_ir_graph.
36 Added routine to free irgraphs.
39 Improved add routines to sub, supertype in type.c
42 Added implementation of overwrites stuff.
45 Implemented stuff to change the type graph. See
46 typegmod.h and tpop.h for basic documentation of the change.
47 There now exists a type of kind type_id. If this appears
48 externally this is a bug.
51 Added some new access routines to types.
52 List of overwritten fields for entities.
53 Removed a bug in irnode.
56 Added a routine to set the mangled entity name.
57 Added two routines to copy entites.
60 Entities now have two more flags, for visibility and allocation mode.
61 Types that have a layout have a flag indicating whether the layout is
65 We distinguish three kinds of Cond nodes. These can be distinguished
66 by the mode of the selector operand and an internal flag of type cond_kind.
67 First we distinguish binary Conds and switch Conds.
68 A binary Cond has as selector a boolean value. Proj(0) projects the control
69 flow for case "False", Proj(1) the control flow for "True". A binary Cond
70 is recognized by the boolean selector.
71 The switch Cond has as selector an unsigned integer. It produces as result
72 an n+1 Tuple (cf0, ... , cfn) of control flows.
73 We differ two flavours of this Cond. The first, the dense Cond, passes
74 control along output i if the selector value is i, 0 <= i <= n. If the
75 selector value is >n it passes control along output n.
76 The second Cond flavor differes in the treatment of cases not specified in
77 the source program. It magically knows about the existence of Proj nodes.
78 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
79 exists. Else it passes control along output n (even if this Proj does not
80 exist.) This Cond we call "fragmentary". There is a special constructor
81 new_defaultProj that automatically sets the flavor.
82 The two switch flavors are distinguished by a flag of type cond_kind.
83 Default flavor is "dense"
87 tv now implements Minus, Abs.
88 iropt now optimizes these and Div, Mod, Quot, DivMod.
89 Still missing: Shrs, Rot.
90 tarval_shr somtimes performs shrs, depending on the compiler/system!!
91 If the ArmRoq implementation is faulty there might appear errors.
94 Changed ircons: If undefined values are used the Phi construction
95 inserts a constant with value tarval_bad.
98 Changed array bounds in type.h to ir_node*. This allows to
99 construct array bounds that are complex constant expressions
100 simpler. Further dynamic array bounds can be displayed.
101 Comment in ircons.c extended: undefined values in start_block.
104 ifdef'ed all uses of gmp in tv.c away. Optimizations for
105 mode_Z no more supported, as well as constants of that mode.
108 Dokumentation in ir_dump
109 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
110 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
113 We need an entity for the array elements for the Sel nodes. This
114 entity should be stored in the array type. Changed constructor
115 parameters: include array element type. Entity for elements is built
120 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
123 Added list of member entites to union. unioned_types and delimiters
124 are superfluous now -- removed.
125 Rationale: we want to express selection of a union member as a Sel
126 node. for this we need to have entities. The entities contain the
127 unioned type and have as name the delimiters...
130 Changed Makefile/MakeTargets to install headers and libraries
134 Changed Makefile and Configure scripts to produce a proper tar file
135 for distribution (libfirm-VERSION.tar)
136 Use 'make distrib' instead of 'make dist'
139 Changed implementation of tr module. With this I also changed the
140 interface!! Type casts are unnecessary now, but some access funcions
144 ======================================================================
145 ==================== New version: 0.3.0 ==============================
146 ======================================================================
152 added creation of a tar archive for distribution
153 replaced ir/.dummy.in by ir/Makefile.in
156 Changed equivalent_node() and copy_preds() so that the end block
157 is not optimized away if it has no real predecessors. This fixes
158 the problem with the while examples.
159 Added while_example in Makefile
162 Fooled around with if_while_example: Why does cse make it abort?
163 Cse removes path to End node, Bad remains as pred of Endblock.
164 The block walker can't deal with this.
165 Made new example with only loop: while_example.
168 added auto documentation in Makefiles, configure, etc
169 example in ir/ir/ircons.c - much must be added
170 creation of documentation by 'make autodoc' in architecture directory
173 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
174 replaced some C++ style comments (//) by standard C comments /**/
177 - configure (with some features, see --help for more)
178 - make [depend | tags | install]
179 - make [run] in testprograms
181 - compilation on SunOS
183 - automatic call of autoconf if required
186 More colours in vcg output.
187 Fixed bug: cse found that start block equals it's
188 first successor as both have the Start block as predecessor.
189 This only happens for local_optimize_graph() as during construction
190 the Start block is not entered in the value table.
191 Changed implementation: irgmod: local_optimize_graph() did not
192 empty the hash table with the irnodes for cse. This might cause that
193 cse turns up with a node that seems better but was removed from the
194 graph in an earlier optimization phase.
195 Removed old #if 1 from ircons.c
196 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
197 Optimizes blocks that had bad predecessors.
202 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
203 Added a module deb_info in debug.h. Adapted makefile. Added example
205 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
207 Removed inabled code for dead node elimination in irgopt.h.
208 Renamed some missnamed access routines (_of_). Macros with old names
209 are in old_fctnames.h.
210 Edited makefiles to remove #* and *.flc.
213 Some minor bugfixes...
216 After compacting of in arrays in dead_node_elimination
217 merge blocks and remove Phis with one pred.
220 Freeing of obstack in dead_node_elimination commented in.
221 Compacting in arrays of Block and Phi nodes in dead_node_
226 added set/get_SymConst_type_or_id in irnode.h
227 added field offset to entity in entity.h
228 added field size to type_class in type.h
229 include "gmp.h" in tv.h with "" instead <>
232 Some changes to make the lib better portable
235 Initialize max_node_nr in irprog.
238 Now outputs warning if faulty type in irdump, dump_type_info.
239 Explicit string termination in irdump, vcg_open.
242 Added external to declaration of irp.
243 Added typedef before pns and pnc_number.
244 irmode.c, init_mode(): We need to memset all new modes as
245 tarval_vrfy reads fields before they are initialized: It
246 compares to min/max when tarvals for min/max are allocated!
249 Changed parameter of Methods in type.h and type.c from
250 class to clss. Class is a C++ keyword.
253 Changed some testprograms to accomodate Uebprakt.
256 Finished implementation of dump_all_types.
257 Added new testprogram inheritance_example.
260 Added seven access routines in type.[hc]:
261 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
262 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
263 Fixed the type_walk_2 for those seven routines.
266 Added irdump routine dump_all_types.
267 Did changes to irprog, type, typewalk to achieve this.
268 typewalk needs to walk along members, sub and supertypes, this
269 is still missing! irdump then needs to output these edges.
271 ======================================================================
272 ==================== New version: 0.2.5 ==============================
273 ======================================================================
276 Made new Version: 0.2.5
278 15.8.2000 Goetz until 3.9.00
279 Separated irnode.h and many others into two files: one public
281 Added funcionality to extract headers for lib.
284 type_dump also dumps irg->ent
285 if_example: corrected nr of locals
288 irgopt: Correct copy of self pointer in start block.
289 irgopt: Correct treatment of loops: pre function in walker
290 breaks all possible loops in Phi and Block nodes.
291 irr_loop_example: wrong Return statement
292 Now I fixed all but one error: in memory_example.
293 This error showed a conceptual problem, so I wrote
294 a slightly different algorithm. This now runs for
296 dead_node_example: cse is buggy!! merges start and the
300 looking at bug in dead_node_elimination.
302 irnode: all get_..._arr functions changed
303 ircons: new_r_Block: set matured flag.
304 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
305 adapted call_str_example to new concepts.
308 Implemented simpler Phi construction algorithm that constructs
309 correct code for three_cfpred_example in ircons. This algorithm
310 generates more Id nodes than the original algorithm and therefore
312 Also made some changes to optimizations of Not.
315 Fixed a bug, caused by the recursive use in type.h and entity.h.
316 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
317 Fixed a problem in if_while testprogram, so it now works.
320 Fixed bug in optimize(). Returned Null instead n if
321 get_optimize() == false.
324 Added some access routines in type.[hc]. Solved a recursive definition
325 of type_class struct, entity struct and type union.
328 Separated entity header into pure functional header and header
332 ... a bunch small changes not documented
335 Changed output of oo_prog_example: now uses the internal list
336 of all irgs. Had to implement some of the access routines for
337 that. Also fixed a bug in irdump. Main routines did not use
338 current_ir_graph properly.
341 Implemented some missing parts in irgopt.
342 Added field irg to entity. Only valid if entity is a method.
343 Had to resove a cyclic de[endency between irgraph.h and entity.h
345 Added fields sub and super to type_class for inheritance.
346 Added field main_irg to irprog.
349 Fixed some bugs in irgopt.c
350 Added some missing 'get_new_node' methods, so the new obstack contains
354 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
355 Solved some copy'n'paste problems. Deleted most debug-code!
356 Added comments to several files.
359 Fixed bug in _r_ constructors for all four Div operations.
360 Fixed bug in turn_into_tuple: didn't remember the block.
361 Tested transform_node.
364 Fixed some testprograms to new semantics of firm.
365 Added testprogram global_var_example.
366 Fixed a bug in irop: Size of Sel node was (entity *) instead of
367 sel_attr. Therefor array_heap_example aborted.
368 Also found a missing break in typewalk, case iro_Alloc.
369 Added a construct that unifies all things constructed by the lib
370 and needed to represent a program: irprog.ch
371 This contains a list of all types as well as a list of all ir graphs.
372 I added calls to initialization and constructors so that this is constructed
373 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
374 Removed strange block struct and constructor from ircons.c.
375 Moved routines for automatic Phi construction from irgmod to ircons.
376 Sorted functions in ircons to reflect the different interfaces.
377 Renamed dataseg to globals to be conformant with documentation.
378 Added conservation of current_ir_graph to irgopt.c.
379 Corrected bug in Makefiles: wrong path to directory ./inlude.
382 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
383 We should change the naming of the Block constructor.
384 Removed acces routines to attr. "closed" of Block.
385 Removed second implementation of new_ir_node from ircons and some comments
386 concerned with the now resolved cyclic dependency.
387 Fixed some bugs in irgopt so that the compilation goes through.
390 Changed the irnode attribut 'visit' into 'visited'.
391 Added some access functions, like get/set_irn_visit etc.
394 Renamed some access funtion in irgraph.*.
395 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
396 Added two attributes to the irgraph struct. The visited flags belongs
397 to a ir graph, not to a whole program.
400 A new optimization has been finished. The dead-node-elimination copies
401 the existing ir graph from one opstack to another. While walking the
402 graph, only the reachable nodes will be copied, so the "dead-nodes"
403 (unreachable in the controlflow) are removed.
406 Solved some problems in the 'copy_node' function. The in array was not
407 as easy as it seamed.
410 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
411 optimization, which is needed in the paramter list of 'irg_walk'.
414 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
415 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
419 Removed some files from the archive, after dependencies and usage are
421 - 'ir/common/strerror.c'
423 - 'ir/ident/xx_ident.h'
424 an empty file, only included by 'ident.c', but never used;
425 - 'ir/tv/label.c' and
427 contained a numeric counter;
428 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
429 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
430 In the old fiasco compiler, the label thing is used in the backend.
431 Search for 'babil' to see the usage.
432 Also removed the two attributes 'lab' and 'used' in the tarval struct.
435 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
436 afterwards some recursive includes, so libfirm works again.
439 Did a lot of changes, which I never commented until now (4.7.00).
441 * Added new result to Start node: Pointer to global data segment.
442 * Extended Semantics of SymConst node to represent information for the
444 * Added arithmeitc nodes (Shrs, Minus ...)
446 Rearranged the directory structure and adjusted the makefiles.
447 The directories contain:
448 ir: everything for the intermediate representation (better: src?)
449 /ir: the ir itself, and standard optimizations.
450 /tv: the target value module
451 /tr: the type and entity representation
452 /adt: abstract data types
453 /common: stuff needed by all other dirs
454 /debug: debugging Unterstuetzung
456 include: external files needen as includes
457 testprograms: examples to test the lib.
459 The makefiles generate files with extension .d that contain the dependencies
463 Added access routine to attribute link of irnode in irnode.ch.
464 Added get_negated_pnc to irnode.ch.
467 Added an iterator in iropt that calls the optimization for all nodes.
468 Copied optimize's code to optimize_in_place and removed deallocations.
469 Made set_irn_n in irnode.c public.
470 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
471 are allowded as cfgpredecessors to represent dead "incoming" control
473 Added call to optimize_in_place in mature_block. Is this useful?
476 Changed tests from comparing enums to comparing pointers. This is more
477 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
478 now get_irn_op == op_And
481 Compared equivalent_value to the one in the original fiasco.
482 Added a test in case iro_And.
483 Changed implementation of iro_Div. Added routines turn_into_tuple
484 and set_irn_op() in irgmod/irnode.
485 Changed implementation of irn_Minus (although commented out).
486 Now all features are ported or documented for this function.
489 Compared computed_value to the one in the original fiasco.
490 Added one further optimization in case iro_Proj.
491 Now all features are ported for this function.
494 Updated comments in ircons.h.
497 Changed possible attribute of SymConst from type_class to type.
498 SymConst size could be the size of a union, array, ...
501 Implemented two dumpers that dump type information and a graph with
505 Implemented a walker that walks over the type informatin that can
506 be reached from an ir node.
507 Added routine get_kind(firm_thing) in common.h, Added file common.c.
508 Added files typewalk.ch and routines to irdump.
509 Added visited flags and initialization to entity and all types.
510 Implemented some of the missing access routines in type.c, entity.c
513 Implemented constructor for ShrA.
515 Added routine that iterates the graph and verifies all nodes.
516 Added Phi_in stack to irgraph. This allows to build several
517 graphs at once with respect to the Phi building algorithm.
520 Implemented dumper for control flow graphs. Changed irr_* and dead_*
521 examples to dump cfg.
524 Implemeted explicit stack for the Phi node generation. See ircons.c.
527 added include string.h in xoprintf.c to get rid of warning:
528 implicit declaration of function `bcopy'
532 Added more cases to equivalent_node.
533 Portet gigo, identify, identify_remember.
534 The set/pset library can not handle several hash tables. At least,
535 compiling several procedures causes a segmentation fault during access
536 to the tables (oo_program_example). Need to work on this.
537 transform_node still needs to be ported.
538 some cases in equivalent_node are still missing.
540 To get it running I had to remove the call to optimize in the
541 new_Block constructor. It can only be called when the Block is
545 Introduced a walker that walks only over blocks. The asserts
546 might be too strict for general graphs, but so far it works.
547 For the walker I introduced an additional flag in the attribute
548 of Blocks, an a global block_visited variable (in irgraph.h).
549 Furhter I modularized dump_ir_node, implemented dump_ir_graph
550 with the existing walker, and added new routines to output a
552 Changed the examples to call the new dump routine.
555 Added auxiliary routines to ir_node:
556 skip_Proj, skip_Nop, is_Bad ...
557 Changed access routines to use get_irn_n instead of explicit array
558 accesses. Changed get_irn_n to call skip_Id, so that the access routines
559 never will return Id nodes.
562 Repaired Phi computation, changed new_r_Phi_in. Added test program to
563 test irregular controlflow.
566 Updated optimizations computed_value and equivalent_node to new
567 Syntax of FIRM nodes and to use access routines.
568 Added routine skip_Proj in irnode.
570 2.2.2000 Boris Boesler
571 Added files irgwalk.c and irgwalk.h. They include a simple function to
572 traverse an ir graph and execute pre and post functions to current node.
575 Added arrays with parameters and result types to the type informtion
576 of a procedure. This is needed for the code generation. Also added
577 the corresponding access routines.
578 Adapted the testprograms.
581 Found a bug / complication: the call order
582 get_value (makes Phi0, put's it into graph_arr)
583 set_value (overwrites Phi0 in graph_arr)
584 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
586 fails. Added test wether graph_arr is already set in phi_merge.
588 Added tons of comments to explain Phi generation -- the stack hack.
592 irdump now outputs the pnc_number for projs of Cmp nodes.
593 Added routine to access the pnc_string.
596 Added result "dataseg" to Start node, with all it's consequences.
597 We need this for the compiler lab to translate global variables.
598 Now they can be selected from the data segment, and the start
599 node supplies the pointer to this segment.
600 These changes are guarded by preprocessor variable UEBPRAKT in
602 Changed files: common.h, irgraph.ch, irnode.h
606 removed array_example, added array-heap_example and
607 array-stack_example and adapted makefile.
609 Entity now also allows type_method as owner. This is to model
610 the stack, Sel nodes that select a variable (array) from the
611 stack need an entity that describes what they select. This
612 entity gets the type of the enclosing procedure as owner.
615 Added future access routines in `irmode.[ch]' as comments,
616 that all attributes in the ir_mode struct can be user-defined.
617 Added access routines in `irgraph.[ch]', for all attributes.
620 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
621 Added `irvrfy.[ch]' to MAKEFILE
622 Added "inline" before access routines in `irnode.h', that no warnings
623 will appear furthermore.
624 Added three more access routines in `irmode.[ch]':
625 struct tarval *get_min_of_mode (ir_mode *mode);
626 struct tarval *get_max_of_mode (ir_mode *mode);
627 struct tarval *get_null_of_mode (ir_mode *mode);
630 Adaption of Alloc, Sel and Entity to new types:
631 Changed array_example to use type instead of type_class.
632 Changed entity to allow all types as owner instead of
633 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
634 Changed alloc to allow allocating variables of any type instead of
636 Adapted all testprograms to avoid warnings.
638 removed dtest ... from Makefile, replaced by test.
641 Added "run" to makefile, added array_example to makefile of testprograms.
642 Corrected testprogram array
643 Changed assert in irvrfy -- Conv.
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