2 Entities now have two more flags, for visibility and allocation mode.
3 Types that have a layout have a flag indicating whether the layout is
7 We distinguish three kinds of Cond nodes. These can be distinguished
8 by the mode of the selector operand and an internal flag of type cond_kind.
9 First we distinguish binary Conds and switch Conds.
10 A binary Cond has as selector a boolean value. Proj(0) projects the control
11 flow for case "False", Proj(1) the control flow for "True". A binary Cond
12 is recognized by the boolean selector.
13 The switch Cond has as selector an unsigned integer. It produces as result
14 an n+1 Tuple (cf0, ... , cfn) of control flows.
15 We differ two flavours of this Cond. The first, the dense Cond, passes
16 control along output i if the selector value is i, 0 <= i <= n. If the
17 selector value is >n it passes control along output n.
18 The second Cond flavor differes in the treatment of cases not specified in
19 the source program. It magically knows about the existence of Proj nodes.
20 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
21 exists. Else it passes control along output n (even if this Proj does not
22 exist.) This Cond we call "fragmentary". There is a special constructor
23 new_defaultProj that automatically sets the flavor.
24 The two switch flavors are distinguished by a flag of type cond_kind.
25 Default flavor is "dense"
29 tv now implements Minus, Abs.
30 iropt now optimizes these and Div, Mod, Quot, DivMod.
31 Still missing: Shrs, Rot.
32 tarval_shr somtimes performs shrs, depending on the compiler/system!!
33 If the ArmRoq implementation is faulty there might appear errors.
36 Changed ircons: If undefined values are used the Phi construction
37 inserts a constant with value tarval_bad.
40 Changed array bounds in type.h to ir_node*. This allows to
41 construct array bounds that are complex constant expressions
42 simpler. Further dynamic array bounds can be displayed.
43 Comment in ircons.c extended: undefined values in start_block.
46 ifdef'ed all uses of gmp in tv.c away. Optimizations for
47 mode_Z no more supported, as well as constants of that mode.
50 Dokumentation in ir_dump
51 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
52 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
55 We need an entity for the array elements for the Sel nodes. This
56 entity should be stored in the array type. Changed constructor
57 parameters: include array element type. Entity for elements is built
62 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
65 Added list of member entites to union. unioned_types and delimiters
66 are superfluous now -- removed.
67 Rationale: we want to express selection of a union member as a Sel
68 node. for this we need to have entities. The entities contain the
69 unioned type and have as name the delimiters...
72 Changed Makefile/MakeTargets to install headers and libraries
76 Changed Makefile and Configure scripts to produce a proper tar file
77 for distribution (libfirm-VERSION.tar)
78 Use 'make distrib' instead of 'make dist'
81 Changed implementation of tr module. With this I also changed the
82 interface!! Type casts are unnecessary now, but some access funcions
86 ======================================================================
87 ==================== New version: 0.3.0 ==============================
88 ======================================================================
94 added creation of a tar archive for distribution
95 replaced ir/.dummy.in by ir/Makefile.in
98 Changed equivalent_node() and copy_preds() so that the end block
99 is not optimized away if it has no real predecessors. This fixes
100 the problem with the while examples.
101 Added while_example in Makefile
104 Fooled around with if_while_example: Why does cse make it abort?
105 Cse removes path to End node, Bad remains as pred of Endblock.
106 The block walker can't deal with this.
107 Made new example with only loop: while_example.
110 added auto documentation in Makefiles, configure, etc
111 example in ir/ir/ircons.c - much must be added
112 creation of documentation by 'make autodoc' in architecture directory
115 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
116 replaced some C++ style comments (//) by standard C comments /**/
119 - configure (with some features, see --help for more)
120 - make [depend | tags | install]
121 - make [run] in testprograms
123 - compilation on SunOS
125 - automatic call of autoconf if required
128 More colours in vcg output.
129 Fixed bug: cse found that start block equals it's
130 first successor as both have the Start block as predecessor.
131 This only happens for local_optimize_graph() as during construction
132 the Start block is not entered in the value table.
133 Changed implementation: irgmod: local_optimize_graph() did not
134 empty the hash table with the irnodes for cse. This might cause that
135 cse turns up with a node that seems better but was removed from the
136 graph in an earlier optimization phase.
137 Removed old #if 1 from ircons.c
138 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
139 Optimizes blocks that had bad predecessors.
144 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
145 Added a module deb_info in debug.h. Adapted makefile. Added example
147 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
149 Removed inabled code for dead node elimination in irgopt.h.
150 Renamed some missnamed access routines (_of_). Macros with old names
151 are in old_fctnames.h.
152 Edited makefiles to remove #* and *.flc.
155 Some minor bugfixes...
158 After compacting of in arrays in dead_node_elimination
159 merge blocks and remove Phis with one pred.
162 Freeing of obstack in dead_node_elimination commented in.
163 Compacting in arrays of Block and Phi nodes in dead_node_
168 added set/get_SymConst_type_or_id in irnode.h
169 added field offset to entity in entity.h
170 added field size to type_class in type.h
171 include "gmp.h" in tv.h with "" instead <>
174 Some changes to make the lib better portable
177 Initialize max_node_nr in irprog.
180 Now outputs warning if faulty type in irdump, dump_type_info.
181 Explicit string termination in irdump, vcg_open.
184 Added external to declaration of irp.
185 Added typedef before pns and pnc_number.
186 irmode.c, init_mode(): We need to memset all new modes as
187 tarval_vrfy reads fields before they are initialized: It
188 compares to min/max when tarvals for min/max are allocated!
191 Changed parameter of Methods in type.h and type.c from
192 class to clss. Class is a C++ keyword.
195 Changed some testprograms to accomodate Uebprakt.
198 Finished implementation of dump_all_types.
199 Added new testprogram inheritance_example.
202 Added seven access routines in type.[hc]:
203 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
204 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
205 Fixed the type_walk_2 for those seven routines.
208 Added irdump routine dump_all_types.
209 Did changes to irprog, type, typewalk to achieve this.
210 typewalk needs to walk along members, sub and supertypes, this
211 is still missing! irdump then needs to output these edges.
213 ======================================================================
214 ==================== New version: 0.2.5 ==============================
215 ======================================================================
218 Made new Version: 0.2.5
220 15.8.2000 Goetz until 3.9.00
221 Separated irnode.h and many others into two files: one public
223 Added funcionality to extract headers for lib.
226 type_dump also dumps irg->ent
227 if_example: corrected nr of locals
230 irgopt: Correct copy of self pointer in start block.
231 irgopt: Correct treatment of loops: pre function in walker
232 breaks all possible loops in Phi and Block nodes.
233 irr_loop_example: wrong Return statement
234 Now I fixed all but one error: in memory_example.
235 This error showed a conceptual problem, so I wrote
236 a slightly different algorithm. This now runs for
238 dead_node_example: cse is buggy!! merges start and the
242 looking at bug in dead_node_elimination.
244 irnode: all get_..._arr functions changed
245 ircons: new_r_Block: set matured flag.
246 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
247 adapted call_str_example to new concepts.
250 Implemented simpler Phi construction algorithm that constructs
251 correct code for three_cfpred_example in ircons. This algorithm
252 generates more Id nodes than the original algorithm and therefore
254 Also made some changes to optimizations of Not.
257 Fixed a bug, caused by the recursive use in type.h and entity.h.
258 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
259 Fixed a problem in if_while testprogram, so it now works.
262 Fixed bug in optimize(). Returned Null instead n if
263 get_optimize() == false.
266 Added some access routines in type.[hc]. Solved a recursive definition
267 of type_class struct, entity struct and type union.
270 Separated entity header into pure functional header and header
274 ... a bunch small changes not documented
277 Changed output of oo_prog_example: now uses the internal list
278 of all irgs. Had to implement some of the access routines for
279 that. Also fixed a bug in irdump. Main routines did not use
280 current_ir_graph properly.
283 Implemented some missing parts in irgopt.
284 Added field irg to entity. Only valid if entity is a method.
285 Had to resove a cyclic de[endency between irgraph.h and entity.h
287 Added fields sub and super to type_class for inheritance.
288 Added field main_irg to irprog.
291 Fixed some bugs in irgopt.c
292 Added some missing 'get_new_node' methods, so the new obstack contains
296 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
297 Solved some copy'n'paste problems. Deleted most debug-code!
298 Added comments to several files.
301 Fixed bug in _r_ constructors for all four Div operations.
302 Fixed bug in turn_into_tuple: didn't remember the block.
303 Tested transform_node.
306 Fixed some testprograms to new semantics of firm.
307 Added testprogram global_var_example.
308 Fixed a bug in irop: Size of Sel node was (entity *) instead of
309 sel_attr. Therefor array_heap_example aborted.
310 Also found a missing break in typewalk, case iro_Alloc.
311 Added a construct that unifies all things constructed by the lib
312 and needed to represent a program: irprog.ch
313 This contains a list of all types as well as a list of all ir graphs.
314 I added calls to initialization and constructors so that this is constructed
315 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
316 Removed strange block struct and constructor from ircons.c.
317 Moved routines for automatic Phi construction from irgmod to ircons.
318 Sorted functions in ircons to reflect the different interfaces.
319 Renamed dataseg to globals to be conformant with documentation.
320 Added conservation of current_ir_graph to irgopt.c.
321 Corrected bug in Makefiles: wrong path to directory ./inlude.
324 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
325 We should change the naming of the Block constructor.
326 Removed acces routines to attr. "closed" of Block.
327 Removed second implementation of new_ir_node from ircons and some comments
328 concerned with the now resolved cyclic dependency.
329 Fixed some bugs in irgopt so that the compilation goes through.
332 Changed the irnode attribut 'visit' into 'visited'.
333 Added some access functions, like get/set_irn_visit etc.
336 Renamed some access funtion in irgraph.*.
337 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
338 Added two attributes to the irgraph struct. The visited flags belongs
339 to a ir graph, not to a whole program.
342 A new optimization has been finished. The dead-node-elimination copies
343 the existing ir graph from one opstack to another. While walking the
344 graph, only the reachable nodes will be copied, so the "dead-nodes"
345 (unreachable in the controlflow) are removed.
348 Solved some problems in the 'copy_node' function. The in array was not
349 as easy as it seamed.
352 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
353 optimization, which is needed in the paramter list of 'irg_walk'.
356 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
357 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
361 Removed some files from the archive, after dependencies and usage are
363 - 'ir/common/strerror.c'
365 - 'ir/ident/xx_ident.h'
366 an empty file, only included by 'ident.c', but never used;
367 - 'ir/tv/label.c' and
369 contained a numeric counter;
370 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
371 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
372 In the old fiasco compiler, the label thing is used in the backend.
373 Search for 'babil' to see the usage.
374 Also removed the two attributes 'lab' and 'used' in the tarval struct.
377 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
378 afterwards some recursive includes, so libfirm works again.
381 Did a lot of changes, which I never commented until now (4.7.00).
383 * Added new result to Start node: Pointer to global data segment.
384 * Extended Semantics of SymConst node to represent information for the
386 * Added arithmeitc nodes (Shrs, Minus ...)
388 Rearranged the directory structure and adjusted the makefiles.
389 The directories contain:
390 ir: everything for the intermediate representation (better: src?)
391 /ir: the ir itself, and standard optimizations.
392 /tv: the target value module
393 /tr: the type and entity representation
394 /adt: abstract data types
395 /common: stuff needed by all other dirs
396 /debug: debugging Unterstuetzung
398 include: external files needen as includes
399 testprograms: examples to test the lib.
401 The makefiles generate files with extension .d that contain the dependencies
405 Added access routine to attribute link of irnode in irnode.ch.
406 Added get_negated_pnc to irnode.ch.
409 Added an iterator in iropt that calls the optimization for all nodes.
410 Copied optimize's code to optimize_in_place and removed deallocations.
411 Made set_irn_n in irnode.c public.
412 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
413 are allowded as cfgpredecessors to represent dead "incoming" control
415 Added call to optimize_in_place in mature_block. Is this useful?
418 Changed tests from comparing enums to comparing pointers. This is more
419 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
420 now get_irn_op == op_And
423 Compared equivalent_value to the one in the original fiasco.
424 Added a test in case iro_And.
425 Changed implementation of iro_Div. Added routines turn_into_tuple
426 and set_irn_op() in irgmod/irnode.
427 Changed implementation of irn_Minus (although commented out).
428 Now all features are ported or documented for this function.
431 Compared computed_value to the one in the original fiasco.
432 Added one further optimization in case iro_Proj.
433 Now all features are ported for this function.
436 Updated comments in ircons.h.
439 Changed possible attribute of SymConst from type_class to type.
440 SymConst size could be the size of a union, array, ...
443 Implemented two dumpers that dump type information and a graph with
447 Implemented a walker that walks over the type informatin that can
448 be reached from an ir node.
449 Added routine get_kind(firm_thing) in common.h, Added file common.c.
450 Added files typewalk.ch and routines to irdump.
451 Added visited flags and initialization to entity and all types.
452 Implemented some of the missing access routines in type.c, entity.c
455 Implemented constructor for ShrA.
457 Added routine that iterates the graph and verifies all nodes.
458 Added Phi_in stack to irgraph. This allows to build several
459 graphs at once with respect to the Phi building algorithm.
462 Implemented dumper for control flow graphs. Changed irr_* and dead_*
463 examples to dump cfg.
466 Implemeted explicit stack for the Phi node generation. See ircons.c.
469 added include string.h in xoprintf.c to get rid of warning:
470 implicit declaration of function `bcopy'
474 Added more cases to equivalent_node.
475 Portet gigo, identify, identify_remember.
476 The set/pset library can not handle several hash tables. At least,
477 compiling several procedures causes a segmentation fault during access
478 to the tables (oo_program_example). Need to work on this.
479 transform_node still needs to be ported.
480 some cases in equivalent_node are still missing.
482 To get it running I had to remove the call to optimize in the
483 new_Block constructor. It can only be called when the Block is
487 Introduced a walker that walks only over blocks. The asserts
488 might be too strict for general graphs, but so far it works.
489 For the walker I introduced an additional flag in the attribute
490 of Blocks, an a global block_visited variable (in irgraph.h).
491 Furhter I modularized dump_ir_node, implemented dump_ir_graph
492 with the existing walker, and added new routines to output a
494 Changed the examples to call the new dump routine.
497 Added auxiliary routines to ir_node:
498 skip_Proj, skip_Nop, is_Bad ...
499 Changed access routines to use get_irn_n instead of explicit array
500 accesses. Changed get_irn_n to call skip_Id, so that the access routines
501 never will return Id nodes.
504 Repaired Phi computation, changed new_r_Phi_in. Added test program to
505 test irregular controlflow.
508 Updated optimizations computed_value and equivalent_node to new
509 Syntax of FIRM nodes and to use access routines.
510 Added routine skip_Proj in irnode.
512 2.2.2000 Boris Boesler
513 Added files irgwalk.c and irgwalk.h. They include a simple function to
514 traverse an ir graph and execute pre and post functions to current node.
517 Added arrays with parameters and result types to the type informtion
518 of a procedure. This is needed for the code generation. Also added
519 the corresponding access routines.
520 Adapted the testprograms.
523 Found a bug / complication: the call order
524 get_value (makes Phi0, put's it into graph_arr)
525 set_value (overwrites Phi0 in graph_arr)
526 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
528 fails. Added test wether graph_arr is already set in phi_merge.
530 Added tons of comments to explain Phi generation -- the stack hack.
534 irdump now outputs the pnc_number for projs of Cmp nodes.
535 Added routine to access the pnc_string.
538 Added result "dataseg" to Start node, with all it's consequences.
539 We need this for the compiler lab to translate global variables.
540 Now they can be selected from the data segment, and the start
541 node supplies the pointer to this segment.
542 These changes are guarded by preprocessor variable UEBPRAKT in
544 Changed files: common.h, irgraph.ch, irnode.h
548 removed array_example, added array-heap_example and
549 array-stack_example and adapted makefile.
551 Entity now also allows type_method as owner. This is to model
552 the stack, Sel nodes that select a variable (array) from the
553 stack need an entity that describes what they select. This
554 entity gets the type of the enclosing procedure as owner.
557 Added future access routines in `irmode.[ch]' as comments,
558 that all attributes in the ir_mode struct can be user-defined.
559 Added access routines in `irgraph.[ch]', for all attributes.
562 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
563 Added `irvrfy.[ch]' to MAKEFILE
564 Added "inline" before access routines in `irnode.h', that no warnings
565 will appear furthermore.
566 Added three more access routines in `irmode.[ch]':
567 struct tarval *get_min_of_mode (ir_mode *mode);
568 struct tarval *get_max_of_mode (ir_mode *mode);
569 struct tarval *get_null_of_mode (ir_mode *mode);
572 Adaption of Alloc, Sel and Entity to new types:
573 Changed array_example to use type instead of type_class.
574 Changed entity to allow all types as owner instead of
575 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
576 Changed alloc to allow allocating variables of any type instead of
578 Adapted all testprograms to avoid warnings.
580 removed dtest ... from Makefile, replaced by test.
583 Added "run" to makefile, added array_example to makefile of testprograms.
584 Corrected testprogram array
585 Changed assert in irvrfy -- Conv.
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