2 Added routine to free irgraphs.
5 Improved add routines to sub, supertype in type.c
8 Added implementation of overwrites stuff.
11 Implemented stuff to change the type graph. See
12 typegmod.h and tpop.h for basic documentation of the change.
13 There now exists a type of kind type_id. If this appears
14 externally this is a bug.
17 Added some new access routines to types.
18 List of overwritten fields for entities.
19 Removed a bug in irnode.
22 Added a routine to set the mangled entity name.
23 Added two routines to copy entites.
26 Entities now have two more flags, for visibility and allocation mode.
27 Types that have a layout have a flag indicating whether the layout is
31 We distinguish three kinds of Cond nodes. These can be distinguished
32 by the mode of the selector operand and an internal flag of type cond_kind.
33 First we distinguish binary Conds and switch Conds.
34 A binary Cond has as selector a boolean value. Proj(0) projects the control
35 flow for case "False", Proj(1) the control flow for "True". A binary Cond
36 is recognized by the boolean selector.
37 The switch Cond has as selector an unsigned integer. It produces as result
38 an n+1 Tuple (cf0, ... , cfn) of control flows.
39 We differ two flavours of this Cond. The first, the dense Cond, passes
40 control along output i if the selector value is i, 0 <= i <= n. If the
41 selector value is >n it passes control along output n.
42 The second Cond flavor differes in the treatment of cases not specified in
43 the source program. It magically knows about the existence of Proj nodes.
44 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
45 exists. Else it passes control along output n (even if this Proj does not
46 exist.) This Cond we call "fragmentary". There is a special constructor
47 new_defaultProj that automatically sets the flavor.
48 The two switch flavors are distinguished by a flag of type cond_kind.
49 Default flavor is "dense"
53 tv now implements Minus, Abs.
54 iropt now optimizes these and Div, Mod, Quot, DivMod.
55 Still missing: Shrs, Rot.
56 tarval_shr somtimes performs shrs, depending on the compiler/system!!
57 If the ArmRoq implementation is faulty there might appear errors.
60 Changed ircons: If undefined values are used the Phi construction
61 inserts a constant with value tarval_bad.
64 Changed array bounds in type.h to ir_node*. This allows to
65 construct array bounds that are complex constant expressions
66 simpler. Further dynamic array bounds can be displayed.
67 Comment in ircons.c extended: undefined values in start_block.
70 ifdef'ed all uses of gmp in tv.c away. Optimizations for
71 mode_Z no more supported, as well as constants of that mode.
74 Dokumentation in ir_dump
75 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
76 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
79 We need an entity for the array elements for the Sel nodes. This
80 entity should be stored in the array type. Changed constructor
81 parameters: include array element type. Entity for elements is built
86 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
89 Added list of member entites to union. unioned_types and delimiters
90 are superfluous now -- removed.
91 Rationale: we want to express selection of a union member as a Sel
92 node. for this we need to have entities. The entities contain the
93 unioned type and have as name the delimiters...
96 Changed Makefile/MakeTargets to install headers and libraries
100 Changed Makefile and Configure scripts to produce a proper tar file
101 for distribution (libfirm-VERSION.tar)
102 Use 'make distrib' instead of 'make dist'
105 Changed implementation of tr module. With this I also changed the
106 interface!! Type casts are unnecessary now, but some access funcions
110 ======================================================================
111 ==================== New version: 0.3.0 ==============================
112 ======================================================================
118 added creation of a tar archive for distribution
119 replaced ir/.dummy.in by ir/Makefile.in
122 Changed equivalent_node() and copy_preds() so that the end block
123 is not optimized away if it has no real predecessors. This fixes
124 the problem with the while examples.
125 Added while_example in Makefile
128 Fooled around with if_while_example: Why does cse make it abort?
129 Cse removes path to End node, Bad remains as pred of Endblock.
130 The block walker can't deal with this.
131 Made new example with only loop: while_example.
134 added auto documentation in Makefiles, configure, etc
135 example in ir/ir/ircons.c - much must be added
136 creation of documentation by 'make autodoc' in architecture directory
139 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
140 replaced some C++ style comments (//) by standard C comments /**/
143 - configure (with some features, see --help for more)
144 - make [depend | tags | install]
145 - make [run] in testprograms
147 - compilation on SunOS
149 - automatic call of autoconf if required
152 More colours in vcg output.
153 Fixed bug: cse found that start block equals it's
154 first successor as both have the Start block as predecessor.
155 This only happens for local_optimize_graph() as during construction
156 the Start block is not entered in the value table.
157 Changed implementation: irgmod: local_optimize_graph() did not
158 empty the hash table with the irnodes for cse. This might cause that
159 cse turns up with a node that seems better but was removed from the
160 graph in an earlier optimization phase.
161 Removed old #if 1 from ircons.c
162 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
163 Optimizes blocks that had bad predecessors.
168 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
169 Added a module deb_info in debug.h. Adapted makefile. Added example
171 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
173 Removed inabled code for dead node elimination in irgopt.h.
174 Renamed some missnamed access routines (_of_). Macros with old names
175 are in old_fctnames.h.
176 Edited makefiles to remove #* and *.flc.
179 Some minor bugfixes...
182 After compacting of in arrays in dead_node_elimination
183 merge blocks and remove Phis with one pred.
186 Freeing of obstack in dead_node_elimination commented in.
187 Compacting in arrays of Block and Phi nodes in dead_node_
192 added set/get_SymConst_type_or_id in irnode.h
193 added field offset to entity in entity.h
194 added field size to type_class in type.h
195 include "gmp.h" in tv.h with "" instead <>
198 Some changes to make the lib better portable
201 Initialize max_node_nr in irprog.
204 Now outputs warning if faulty type in irdump, dump_type_info.
205 Explicit string termination in irdump, vcg_open.
208 Added external to declaration of irp.
209 Added typedef before pns and pnc_number.
210 irmode.c, init_mode(): We need to memset all new modes as
211 tarval_vrfy reads fields before they are initialized: It
212 compares to min/max when tarvals for min/max are allocated!
215 Changed parameter of Methods in type.h and type.c from
216 class to clss. Class is a C++ keyword.
219 Changed some testprograms to accomodate Uebprakt.
222 Finished implementation of dump_all_types.
223 Added new testprogram inheritance_example.
226 Added seven access routines in type.[hc]:
227 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
228 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
229 Fixed the type_walk_2 for those seven routines.
232 Added irdump routine dump_all_types.
233 Did changes to irprog, type, typewalk to achieve this.
234 typewalk needs to walk along members, sub and supertypes, this
235 is still missing! irdump then needs to output these edges.
237 ======================================================================
238 ==================== New version: 0.2.5 ==============================
239 ======================================================================
242 Made new Version: 0.2.5
244 15.8.2000 Goetz until 3.9.00
245 Separated irnode.h and many others into two files: one public
247 Added funcionality to extract headers for lib.
250 type_dump also dumps irg->ent
251 if_example: corrected nr of locals
254 irgopt: Correct copy of self pointer in start block.
255 irgopt: Correct treatment of loops: pre function in walker
256 breaks all possible loops in Phi and Block nodes.
257 irr_loop_example: wrong Return statement
258 Now I fixed all but one error: in memory_example.
259 This error showed a conceptual problem, so I wrote
260 a slightly different algorithm. This now runs for
262 dead_node_example: cse is buggy!! merges start and the
266 looking at bug in dead_node_elimination.
268 irnode: all get_..._arr functions changed
269 ircons: new_r_Block: set matured flag.
270 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
271 adapted call_str_example to new concepts.
274 Implemented simpler Phi construction algorithm that constructs
275 correct code for three_cfpred_example in ircons. This algorithm
276 generates more Id nodes than the original algorithm and therefore
278 Also made some changes to optimizations of Not.
281 Fixed a bug, caused by the recursive use in type.h and entity.h.
282 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
283 Fixed a problem in if_while testprogram, so it now works.
286 Fixed bug in optimize(). Returned Null instead n if
287 get_optimize() == false.
290 Added some access routines in type.[hc]. Solved a recursive definition
291 of type_class struct, entity struct and type union.
294 Separated entity header into pure functional header and header
298 ... a bunch small changes not documented
301 Changed output of oo_prog_example: now uses the internal list
302 of all irgs. Had to implement some of the access routines for
303 that. Also fixed a bug in irdump. Main routines did not use
304 current_ir_graph properly.
307 Implemented some missing parts in irgopt.
308 Added field irg to entity. Only valid if entity is a method.
309 Had to resove a cyclic de[endency between irgraph.h and entity.h
311 Added fields sub and super to type_class for inheritance.
312 Added field main_irg to irprog.
315 Fixed some bugs in irgopt.c
316 Added some missing 'get_new_node' methods, so the new obstack contains
320 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
321 Solved some copy'n'paste problems. Deleted most debug-code!
322 Added comments to several files.
325 Fixed bug in _r_ constructors for all four Div operations.
326 Fixed bug in turn_into_tuple: didn't remember the block.
327 Tested transform_node.
330 Fixed some testprograms to new semantics of firm.
331 Added testprogram global_var_example.
332 Fixed a bug in irop: Size of Sel node was (entity *) instead of
333 sel_attr. Therefor array_heap_example aborted.
334 Also found a missing break in typewalk, case iro_Alloc.
335 Added a construct that unifies all things constructed by the lib
336 and needed to represent a program: irprog.ch
337 This contains a list of all types as well as a list of all ir graphs.
338 I added calls to initialization and constructors so that this is constructed
339 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
340 Removed strange block struct and constructor from ircons.c.
341 Moved routines for automatic Phi construction from irgmod to ircons.
342 Sorted functions in ircons to reflect the different interfaces.
343 Renamed dataseg to globals to be conformant with documentation.
344 Added conservation of current_ir_graph to irgopt.c.
345 Corrected bug in Makefiles: wrong path to directory ./inlude.
348 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
349 We should change the naming of the Block constructor.
350 Removed acces routines to attr. "closed" of Block.
351 Removed second implementation of new_ir_node from ircons and some comments
352 concerned with the now resolved cyclic dependency.
353 Fixed some bugs in irgopt so that the compilation goes through.
356 Changed the irnode attribut 'visit' into 'visited'.
357 Added some access functions, like get/set_irn_visit etc.
360 Renamed some access funtion in irgraph.*.
361 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
362 Added two attributes to the irgraph struct. The visited flags belongs
363 to a ir graph, not to a whole program.
366 A new optimization has been finished. The dead-node-elimination copies
367 the existing ir graph from one opstack to another. While walking the
368 graph, only the reachable nodes will be copied, so the "dead-nodes"
369 (unreachable in the controlflow) are removed.
372 Solved some problems in the 'copy_node' function. The in array was not
373 as easy as it seamed.
376 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
377 optimization, which is needed in the paramter list of 'irg_walk'.
380 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
381 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
385 Removed some files from the archive, after dependencies and usage are
387 - 'ir/common/strerror.c'
389 - 'ir/ident/xx_ident.h'
390 an empty file, only included by 'ident.c', but never used;
391 - 'ir/tv/label.c' and
393 contained a numeric counter;
394 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
395 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
396 In the old fiasco compiler, the label thing is used in the backend.
397 Search for 'babil' to see the usage.
398 Also removed the two attributes 'lab' and 'used' in the tarval struct.
401 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
402 afterwards some recursive includes, so libfirm works again.
405 Did a lot of changes, which I never commented until now (4.7.00).
407 * Added new result to Start node: Pointer to global data segment.
408 * Extended Semantics of SymConst node to represent information for the
410 * Added arithmeitc nodes (Shrs, Minus ...)
412 Rearranged the directory structure and adjusted the makefiles.
413 The directories contain:
414 ir: everything for the intermediate representation (better: src?)
415 /ir: the ir itself, and standard optimizations.
416 /tv: the target value module
417 /tr: the type and entity representation
418 /adt: abstract data types
419 /common: stuff needed by all other dirs
420 /debug: debugging Unterstuetzung
422 include: external files needen as includes
423 testprograms: examples to test the lib.
425 The makefiles generate files with extension .d that contain the dependencies
429 Added access routine to attribute link of irnode in irnode.ch.
430 Added get_negated_pnc to irnode.ch.
433 Added an iterator in iropt that calls the optimization for all nodes.
434 Copied optimize's code to optimize_in_place and removed deallocations.
435 Made set_irn_n in irnode.c public.
436 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
437 are allowded as cfgpredecessors to represent dead "incoming" control
439 Added call to optimize_in_place in mature_block. Is this useful?
442 Changed tests from comparing enums to comparing pointers. This is more
443 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
444 now get_irn_op == op_And
447 Compared equivalent_value to the one in the original fiasco.
448 Added a test in case iro_And.
449 Changed implementation of iro_Div. Added routines turn_into_tuple
450 and set_irn_op() in irgmod/irnode.
451 Changed implementation of irn_Minus (although commented out).
452 Now all features are ported or documented for this function.
455 Compared computed_value to the one in the original fiasco.
456 Added one further optimization in case iro_Proj.
457 Now all features are ported for this function.
460 Updated comments in ircons.h.
463 Changed possible attribute of SymConst from type_class to type.
464 SymConst size could be the size of a union, array, ...
467 Implemented two dumpers that dump type information and a graph with
471 Implemented a walker that walks over the type informatin that can
472 be reached from an ir node.
473 Added routine get_kind(firm_thing) in common.h, Added file common.c.
474 Added files typewalk.ch and routines to irdump.
475 Added visited flags and initialization to entity and all types.
476 Implemented some of the missing access routines in type.c, entity.c
479 Implemented constructor for ShrA.
481 Added routine that iterates the graph and verifies all nodes.
482 Added Phi_in stack to irgraph. This allows to build several
483 graphs at once with respect to the Phi building algorithm.
486 Implemented dumper for control flow graphs. Changed irr_* and dead_*
487 examples to dump cfg.
490 Implemeted explicit stack for the Phi node generation. See ircons.c.
493 added include string.h in xoprintf.c to get rid of warning:
494 implicit declaration of function `bcopy'
498 Added more cases to equivalent_node.
499 Portet gigo, identify, identify_remember.
500 The set/pset library can not handle several hash tables. At least,
501 compiling several procedures causes a segmentation fault during access
502 to the tables (oo_program_example). Need to work on this.
503 transform_node still needs to be ported.
504 some cases in equivalent_node are still missing.
506 To get it running I had to remove the call to optimize in the
507 new_Block constructor. It can only be called when the Block is
511 Introduced a walker that walks only over blocks. The asserts
512 might be too strict for general graphs, but so far it works.
513 For the walker I introduced an additional flag in the attribute
514 of Blocks, an a global block_visited variable (in irgraph.h).
515 Furhter I modularized dump_ir_node, implemented dump_ir_graph
516 with the existing walker, and added new routines to output a
518 Changed the examples to call the new dump routine.
521 Added auxiliary routines to ir_node:
522 skip_Proj, skip_Nop, is_Bad ...
523 Changed access routines to use get_irn_n instead of explicit array
524 accesses. Changed get_irn_n to call skip_Id, so that the access routines
525 never will return Id nodes.
528 Repaired Phi computation, changed new_r_Phi_in. Added test program to
529 test irregular controlflow.
532 Updated optimizations computed_value and equivalent_node to new
533 Syntax of FIRM nodes and to use access routines.
534 Added routine skip_Proj in irnode.
536 2.2.2000 Boris Boesler
537 Added files irgwalk.c and irgwalk.h. They include a simple function to
538 traverse an ir graph and execute pre and post functions to current node.
541 Added arrays with parameters and result types to the type informtion
542 of a procedure. This is needed for the code generation. Also added
543 the corresponding access routines.
544 Adapted the testprograms.
547 Found a bug / complication: the call order
548 get_value (makes Phi0, put's it into graph_arr)
549 set_value (overwrites Phi0 in graph_arr)
550 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
552 fails. Added test wether graph_arr is already set in phi_merge.
554 Added tons of comments to explain Phi generation -- the stack hack.
558 irdump now outputs the pnc_number for projs of Cmp nodes.
559 Added routine to access the pnc_string.
562 Added result "dataseg" to Start node, with all it's consequences.
563 We need this for the compiler lab to translate global variables.
564 Now they can be selected from the data segment, and the start
565 node supplies the pointer to this segment.
566 These changes are guarded by preprocessor variable UEBPRAKT in
568 Changed files: common.h, irgraph.ch, irnode.h
572 removed array_example, added array-heap_example and
573 array-stack_example and adapted makefile.
575 Entity now also allows type_method as owner. This is to model
576 the stack, Sel nodes that select a variable (array) from the
577 stack need an entity that describes what they select. This
578 entity gets the type of the enclosing procedure as owner.
581 Added future access routines in `irmode.[ch]' as comments,
582 that all attributes in the ir_mode struct can be user-defined.
583 Added access routines in `irgraph.[ch]', for all attributes.
586 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
587 Added `irvrfy.[ch]' to MAKEFILE
588 Added "inline" before access routines in `irnode.h', that no warnings
589 will appear furthermore.
590 Added three more access routines in `irmode.[ch]':
591 struct tarval *get_min_of_mode (ir_mode *mode);
592 struct tarval *get_max_of_mode (ir_mode *mode);
593 struct tarval *get_null_of_mode (ir_mode *mode);
596 Adaption of Alloc, Sel and Entity to new types:
597 Changed array_example to use type instead of type_class.
598 Changed entity to allow all types as owner instead of
599 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
600 Changed alloc to allow allocating variables of any type instead of
602 Adapted all testprograms to avoid warnings.
604 removed dtest ... from Makefile, replaced by test.
607 Added "run" to makefile, added array_example to makefile of testprograms.
608 Corrected testprogram array
609 Changed assert in irvrfy -- Conv.
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