2 Implemented stuff to change the type graph. See
3 typegmod.h and tpop.h for basic documentation of the change.
4 There now exists a type of kind type_id. If this appears
5 externally this is a bug.
8 Added some new access routines to types.
9 List of overwritten fields for entities.
10 Removed a bug in irnode.
13 Added a routine to set the mangled entity name.
14 Added two routines to copy entites.
17 Entities now have two more flags, for visibility and allocation mode.
18 Types that have a layout have a flag indicating whether the layout is
22 We distinguish three kinds of Cond nodes. These can be distinguished
23 by the mode of the selector operand and an internal flag of type cond_kind.
24 First we distinguish binary Conds and switch Conds.
25 A binary Cond has as selector a boolean value. Proj(0) projects the control
26 flow for case "False", Proj(1) the control flow for "True". A binary Cond
27 is recognized by the boolean selector.
28 The switch Cond has as selector an unsigned integer. It produces as result
29 an n+1 Tuple (cf0, ... , cfn) of control flows.
30 We differ two flavours of this Cond. The first, the dense Cond, passes
31 control along output i if the selector value is i, 0 <= i <= n. If the
32 selector value is >n it passes control along output n.
33 The second Cond flavor differes in the treatment of cases not specified in
34 the source program. It magically knows about the existence of Proj nodes.
35 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
36 exists. Else it passes control along output n (even if this Proj does not
37 exist.) This Cond we call "fragmentary". There is a special constructor
38 new_defaultProj that automatically sets the flavor.
39 The two switch flavors are distinguished by a flag of type cond_kind.
40 Default flavor is "dense"
44 tv now implements Minus, Abs.
45 iropt now optimizes these and Div, Mod, Quot, DivMod.
46 Still missing: Shrs, Rot.
47 tarval_shr somtimes performs shrs, depending on the compiler/system!!
48 If the ArmRoq implementation is faulty there might appear errors.
51 Changed ircons: If undefined values are used the Phi construction
52 inserts a constant with value tarval_bad.
55 Changed array bounds in type.h to ir_node*. This allows to
56 construct array bounds that are complex constant expressions
57 simpler. Further dynamic array bounds can be displayed.
58 Comment in ircons.c extended: undefined values in start_block.
61 ifdef'ed all uses of gmp in tv.c away. Optimizations for
62 mode_Z no more supported, as well as constants of that mode.
65 Dokumentation in ir_dump
66 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
67 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
70 We need an entity for the array elements for the Sel nodes. This
71 entity should be stored in the array type. Changed constructor
72 parameters: include array element type. Entity for elements is built
77 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
80 Added list of member entites to union. unioned_types and delimiters
81 are superfluous now -- removed.
82 Rationale: we want to express selection of a union member as a Sel
83 node. for this we need to have entities. The entities contain the
84 unioned type and have as name the delimiters...
87 Changed Makefile/MakeTargets to install headers and libraries
91 Changed Makefile and Configure scripts to produce a proper tar file
92 for distribution (libfirm-VERSION.tar)
93 Use 'make distrib' instead of 'make dist'
96 Changed implementation of tr module. With this I also changed the
97 interface!! Type casts are unnecessary now, but some access funcions
101 ======================================================================
102 ==================== New version: 0.3.0 ==============================
103 ======================================================================
109 added creation of a tar archive for distribution
110 replaced ir/.dummy.in by ir/Makefile.in
113 Changed equivalent_node() and copy_preds() so that the end block
114 is not optimized away if it has no real predecessors. This fixes
115 the problem with the while examples.
116 Added while_example in Makefile
119 Fooled around with if_while_example: Why does cse make it abort?
120 Cse removes path to End node, Bad remains as pred of Endblock.
121 The block walker can't deal with this.
122 Made new example with only loop: while_example.
125 added auto documentation in Makefiles, configure, etc
126 example in ir/ir/ircons.c - much must be added
127 creation of documentation by 'make autodoc' in architecture directory
130 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
131 replaced some C++ style comments (//) by standard C comments /**/
134 - configure (with some features, see --help for more)
135 - make [depend | tags | install]
136 - make [run] in testprograms
138 - compilation on SunOS
140 - automatic call of autoconf if required
143 More colours in vcg output.
144 Fixed bug: cse found that start block equals it's
145 first successor as both have the Start block as predecessor.
146 This only happens for local_optimize_graph() as during construction
147 the Start block is not entered in the value table.
148 Changed implementation: irgmod: local_optimize_graph() did not
149 empty the hash table with the irnodes for cse. This might cause that
150 cse turns up with a node that seems better but was removed from the
151 graph in an earlier optimization phase.
152 Removed old #if 1 from ircons.c
153 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
154 Optimizes blocks that had bad predecessors.
159 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
160 Added a module deb_info in debug.h. Adapted makefile. Added example
162 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
164 Removed inabled code for dead node elimination in irgopt.h.
165 Renamed some missnamed access routines (_of_). Macros with old names
166 are in old_fctnames.h.
167 Edited makefiles to remove #* and *.flc.
170 Some minor bugfixes...
173 After compacting of in arrays in dead_node_elimination
174 merge blocks and remove Phis with one pred.
177 Freeing of obstack in dead_node_elimination commented in.
178 Compacting in arrays of Block and Phi nodes in dead_node_
183 added set/get_SymConst_type_or_id in irnode.h
184 added field offset to entity in entity.h
185 added field size to type_class in type.h
186 include "gmp.h" in tv.h with "" instead <>
189 Some changes to make the lib better portable
192 Initialize max_node_nr in irprog.
195 Now outputs warning if faulty type in irdump, dump_type_info.
196 Explicit string termination in irdump, vcg_open.
199 Added external to declaration of irp.
200 Added typedef before pns and pnc_number.
201 irmode.c, init_mode(): We need to memset all new modes as
202 tarval_vrfy reads fields before they are initialized: It
203 compares to min/max when tarvals for min/max are allocated!
206 Changed parameter of Methods in type.h and type.c from
207 class to clss. Class is a C++ keyword.
210 Changed some testprograms to accomodate Uebprakt.
213 Finished implementation of dump_all_types.
214 Added new testprogram inheritance_example.
217 Added seven access routines in type.[hc]:
218 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
219 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
220 Fixed the type_walk_2 for those seven routines.
223 Added irdump routine dump_all_types.
224 Did changes to irprog, type, typewalk to achieve this.
225 typewalk needs to walk along members, sub and supertypes, this
226 is still missing! irdump then needs to output these edges.
228 ======================================================================
229 ==================== New version: 0.2.5 ==============================
230 ======================================================================
233 Made new Version: 0.2.5
235 15.8.2000 Goetz until 3.9.00
236 Separated irnode.h and many others into two files: one public
238 Added funcionality to extract headers for lib.
241 type_dump also dumps irg->ent
242 if_example: corrected nr of locals
245 irgopt: Correct copy of self pointer in start block.
246 irgopt: Correct treatment of loops: pre function in walker
247 breaks all possible loops in Phi and Block nodes.
248 irr_loop_example: wrong Return statement
249 Now I fixed all but one error: in memory_example.
250 This error showed a conceptual problem, so I wrote
251 a slightly different algorithm. This now runs for
253 dead_node_example: cse is buggy!! merges start and the
257 looking at bug in dead_node_elimination.
259 irnode: all get_..._arr functions changed
260 ircons: new_r_Block: set matured flag.
261 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
262 adapted call_str_example to new concepts.
265 Implemented simpler Phi construction algorithm that constructs
266 correct code for three_cfpred_example in ircons. This algorithm
267 generates more Id nodes than the original algorithm and therefore
269 Also made some changes to optimizations of Not.
272 Fixed a bug, caused by the recursive use in type.h and entity.h.
273 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
274 Fixed a problem in if_while testprogram, so it now works.
277 Fixed bug in optimize(). Returned Null instead n if
278 get_optimize() == false.
281 Added some access routines in type.[hc]. Solved a recursive definition
282 of type_class struct, entity struct and type union.
285 Separated entity header into pure functional header and header
289 ... a bunch small changes not documented
292 Changed output of oo_prog_example: now uses the internal list
293 of all irgs. Had to implement some of the access routines for
294 that. Also fixed a bug in irdump. Main routines did not use
295 current_ir_graph properly.
298 Implemented some missing parts in irgopt.
299 Added field irg to entity. Only valid if entity is a method.
300 Had to resove a cyclic de[endency between irgraph.h and entity.h
302 Added fields sub and super to type_class for inheritance.
303 Added field main_irg to irprog.
306 Fixed some bugs in irgopt.c
307 Added some missing 'get_new_node' methods, so the new obstack contains
311 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
312 Solved some copy'n'paste problems. Deleted most debug-code!
313 Added comments to several files.
316 Fixed bug in _r_ constructors for all four Div operations.
317 Fixed bug in turn_into_tuple: didn't remember the block.
318 Tested transform_node.
321 Fixed some testprograms to new semantics of firm.
322 Added testprogram global_var_example.
323 Fixed a bug in irop: Size of Sel node was (entity *) instead of
324 sel_attr. Therefor array_heap_example aborted.
325 Also found a missing break in typewalk, case iro_Alloc.
326 Added a construct that unifies all things constructed by the lib
327 and needed to represent a program: irprog.ch
328 This contains a list of all types as well as a list of all ir graphs.
329 I added calls to initialization and constructors so that this is constructed
330 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
331 Removed strange block struct and constructor from ircons.c.
332 Moved routines for automatic Phi construction from irgmod to ircons.
333 Sorted functions in ircons to reflect the different interfaces.
334 Renamed dataseg to globals to be conformant with documentation.
335 Added conservation of current_ir_graph to irgopt.c.
336 Corrected bug in Makefiles: wrong path to directory ./inlude.
339 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
340 We should change the naming of the Block constructor.
341 Removed acces routines to attr. "closed" of Block.
342 Removed second implementation of new_ir_node from ircons and some comments
343 concerned with the now resolved cyclic dependency.
344 Fixed some bugs in irgopt so that the compilation goes through.
347 Changed the irnode attribut 'visit' into 'visited'.
348 Added some access functions, like get/set_irn_visit etc.
351 Renamed some access funtion in irgraph.*.
352 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
353 Added two attributes to the irgraph struct. The visited flags belongs
354 to a ir graph, not to a whole program.
357 A new optimization has been finished. The dead-node-elimination copies
358 the existing ir graph from one opstack to another. While walking the
359 graph, only the reachable nodes will be copied, so the "dead-nodes"
360 (unreachable in the controlflow) are removed.
363 Solved some problems in the 'copy_node' function. The in array was not
364 as easy as it seamed.
367 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
368 optimization, which is needed in the paramter list of 'irg_walk'.
371 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
372 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
376 Removed some files from the archive, after dependencies and usage are
378 - 'ir/common/strerror.c'
380 - 'ir/ident/xx_ident.h'
381 an empty file, only included by 'ident.c', but never used;
382 - 'ir/tv/label.c' and
384 contained a numeric counter;
385 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
386 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
387 In the old fiasco compiler, the label thing is used in the backend.
388 Search for 'babil' to see the usage.
389 Also removed the two attributes 'lab' and 'used' in the tarval struct.
392 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
393 afterwards some recursive includes, so libfirm works again.
396 Did a lot of changes, which I never commented until now (4.7.00).
398 * Added new result to Start node: Pointer to global data segment.
399 * Extended Semantics of SymConst node to represent information for the
401 * Added arithmeitc nodes (Shrs, Minus ...)
403 Rearranged the directory structure and adjusted the makefiles.
404 The directories contain:
405 ir: everything for the intermediate representation (better: src?)
406 /ir: the ir itself, and standard optimizations.
407 /tv: the target value module
408 /tr: the type and entity representation
409 /adt: abstract data types
410 /common: stuff needed by all other dirs
411 /debug: debugging Unterstuetzung
413 include: external files needen as includes
414 testprograms: examples to test the lib.
416 The makefiles generate files with extension .d that contain the dependencies
420 Added access routine to attribute link of irnode in irnode.ch.
421 Added get_negated_pnc to irnode.ch.
424 Added an iterator in iropt that calls the optimization for all nodes.
425 Copied optimize's code to optimize_in_place and removed deallocations.
426 Made set_irn_n in irnode.c public.
427 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
428 are allowded as cfgpredecessors to represent dead "incoming" control
430 Added call to optimize_in_place in mature_block. Is this useful?
433 Changed tests from comparing enums to comparing pointers. This is more
434 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
435 now get_irn_op == op_And
438 Compared equivalent_value to the one in the original fiasco.
439 Added a test in case iro_And.
440 Changed implementation of iro_Div. Added routines turn_into_tuple
441 and set_irn_op() in irgmod/irnode.
442 Changed implementation of irn_Minus (although commented out).
443 Now all features are ported or documented for this function.
446 Compared computed_value to the one in the original fiasco.
447 Added one further optimization in case iro_Proj.
448 Now all features are ported for this function.
451 Updated comments in ircons.h.
454 Changed possible attribute of SymConst from type_class to type.
455 SymConst size could be the size of a union, array, ...
458 Implemented two dumpers that dump type information and a graph with
462 Implemented a walker that walks over the type informatin that can
463 be reached from an ir node.
464 Added routine get_kind(firm_thing) in common.h, Added file common.c.
465 Added files typewalk.ch and routines to irdump.
466 Added visited flags and initialization to entity and all types.
467 Implemented some of the missing access routines in type.c, entity.c
470 Implemented constructor for ShrA.
472 Added routine that iterates the graph and verifies all nodes.
473 Added Phi_in stack to irgraph. This allows to build several
474 graphs at once with respect to the Phi building algorithm.
477 Implemented dumper for control flow graphs. Changed irr_* and dead_*
478 examples to dump cfg.
481 Implemeted explicit stack for the Phi node generation. See ircons.c.
484 added include string.h in xoprintf.c to get rid of warning:
485 implicit declaration of function `bcopy'
489 Added more cases to equivalent_node.
490 Portet gigo, identify, identify_remember.
491 The set/pset library can not handle several hash tables. At least,
492 compiling several procedures causes a segmentation fault during access
493 to the tables (oo_program_example). Need to work on this.
494 transform_node still needs to be ported.
495 some cases in equivalent_node are still missing.
497 To get it running I had to remove the call to optimize in the
498 new_Block constructor. It can only be called when the Block is
502 Introduced a walker that walks only over blocks. The asserts
503 might be too strict for general graphs, but so far it works.
504 For the walker I introduced an additional flag in the attribute
505 of Blocks, an a global block_visited variable (in irgraph.h).
506 Furhter I modularized dump_ir_node, implemented dump_ir_graph
507 with the existing walker, and added new routines to output a
509 Changed the examples to call the new dump routine.
512 Added auxiliary routines to ir_node:
513 skip_Proj, skip_Nop, is_Bad ...
514 Changed access routines to use get_irn_n instead of explicit array
515 accesses. Changed get_irn_n to call skip_Id, so that the access routines
516 never will return Id nodes.
519 Repaired Phi computation, changed new_r_Phi_in. Added test program to
520 test irregular controlflow.
523 Updated optimizations computed_value and equivalent_node to new
524 Syntax of FIRM nodes and to use access routines.
525 Added routine skip_Proj in irnode.
527 2.2.2000 Boris Boesler
528 Added files irgwalk.c and irgwalk.h. They include a simple function to
529 traverse an ir graph and execute pre and post functions to current node.
532 Added arrays with parameters and result types to the type informtion
533 of a procedure. This is needed for the code generation. Also added
534 the corresponding access routines.
535 Adapted the testprograms.
538 Found a bug / complication: the call order
539 get_value (makes Phi0, put's it into graph_arr)
540 set_value (overwrites Phi0 in graph_arr)
541 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
543 fails. Added test wether graph_arr is already set in phi_merge.
545 Added tons of comments to explain Phi generation -- the stack hack.
549 irdump now outputs the pnc_number for projs of Cmp nodes.
550 Added routine to access the pnc_string.
553 Added result "dataseg" to Start node, with all it's consequences.
554 We need this for the compiler lab to translate global variables.
555 Now they can be selected from the data segment, and the start
556 node supplies the pointer to this segment.
557 These changes are guarded by preprocessor variable UEBPRAKT in
559 Changed files: common.h, irgraph.ch, irnode.h
563 removed array_example, added array-heap_example and
564 array-stack_example and adapted makefile.
566 Entity now also allows type_method as owner. This is to model
567 the stack, Sel nodes that select a variable (array) from the
568 stack need an entity that describes what they select. This
569 entity gets the type of the enclosing procedure as owner.
572 Added future access routines in `irmode.[ch]' as comments,
573 that all attributes in the ir_mode struct can be user-defined.
574 Added access routines in `irgraph.[ch]', for all attributes.
577 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
578 Added `irvrfy.[ch]' to MAKEFILE
579 Added "inline" before access routines in `irnode.h', that no warnings
580 will appear furthermore.
581 Added three more access routines in `irmode.[ch]':
582 struct tarval *get_min_of_mode (ir_mode *mode);
583 struct tarval *get_max_of_mode (ir_mode *mode);
584 struct tarval *get_null_of_mode (ir_mode *mode);
587 Adaption of Alloc, Sel and Entity to new types:
588 Changed array_example to use type instead of type_class.
589 Changed entity to allow all types as owner instead of
590 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
591 Changed alloc to allow allocating variables of any type instead of
593 Adapted all testprograms to avoid warnings.
595 removed dtest ... from Makefile, replaced by test.
598 Added "run" to makefile, added array_example to makefile of testprograms.
599 Corrected testprogram array
600 Changed assert in irvrfy -- Conv.
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