2 Added support for constant entities. A new example program illustrates
3 their use. Extended dumper routines to dump constant values.
6 Extendend "comfortable" construction interface by some methods
7 serving as simple shortcuts.
10 Added a class type to irgs. This class type is to be used as owner
11 for local entities of the procedure. This are all entities allocated
12 for each execution of the procedure.
13 The class type is allocated automatically by new_ir_graph(). Access
14 routines to get this type are in irgraph.h.
15 We chose a class type as this allows to represent "inner" procedures
17 Adapted array-stack-example.
20 irdump outputs nodeids instead of pointers for labels of nodes.
21 With a preprocessor flag in common.h this can be turned off.
24 Added an Id tag to every .c and .h file
27 Changed SSA constuction for exception control flow.
28 If PRECISE_EXC_CONTEXT is used Phi nodes will use the values
29 valid when the execption operation was allocated. This increases
30 the memory consuption of the construction algorithm by
34 Added method to replace in array of a node in irnode.c/h
35 Added functionality to irgmod:
36 * collect all Phi nodes as link-list in the Blocks link field
37 * collect all Proj nodes as link-list in node producing the tuple.
38 * Seperate a Block into two
39 Added inlining transformation in irgopt.h
40 Improved output of dump_ir_block_graph. Now also dumps nodes that
41 don't belong to a block.
42 Added flag opt_unreachable_code, opt_inline.
43 Changed irvrfy so that it accepts nodes with Bad predecessors.
46 renamed get_type_nameid to get_type_ident
49 Bugfix: dead node elimination did not replace the hash table
53 Added routine remove_irp_irg.
54 Changed comment to free_ir_graph.
57 Added routine to free irgraphs.
60 Improved add routines to sub, supertype in type.c
63 Added implementation of overwrites stuff.
66 Implemented stuff to change the type graph. See
67 typegmod.h and tpop.h for basic documentation of the change.
68 There now exists a type of kind type_id. If this appears
69 externally this is a bug.
72 Added some new access routines to types.
73 List of overwritten fields for entities.
74 Removed a bug in irnode.
77 Added a routine to set the mangled entity name.
78 Added two routines to copy entites.
81 Entities now have two more flags, for visibility and allocation mode.
82 Types that have a layout have a flag indicating whether the layout is
86 We distinguish three kinds of Cond nodes. These can be distinguished
87 by the mode of the selector operand and an internal flag of type cond_kind.
88 First we distinguish binary Conds and switch Conds.
89 A binary Cond has as selector a boolean value. Proj(0) projects the control
90 flow for case "False", Proj(1) the control flow for "True". A binary Cond
91 is recognized by the boolean selector.
92 The switch Cond has as selector an unsigned integer. It produces as result
93 an n+1 Tuple (cf0, ... , cfn) of control flows.
94 We differ two flavours of this Cond. The first, the dense Cond, passes
95 control along output i if the selector value is i, 0 <= i <= n. If the
96 selector value is >n it passes control along output n.
97 The second Cond flavor differes in the treatment of cases not specified in
98 the source program. It magically knows about the existence of Proj nodes.
99 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
100 exists. Else it passes control along output n (even if this Proj does not
101 exist.) This Cond we call "fragmentary". There is a special constructor
102 new_defaultProj that automatically sets the flavor.
103 The two switch flavors are distinguished by a flag of type cond_kind.
104 Default flavor is "dense"
108 tv now implements Minus, Abs.
109 iropt now optimizes these and Div, Mod, Quot, DivMod.
110 Still missing: Shrs, Rot.
111 tarval_shr somtimes performs shrs, depending on the compiler/system!!
112 If the ArmRoq implementation is faulty there might appear errors.
115 Changed ircons: If undefined values are used the Phi construction
116 inserts a constant with value tarval_bad.
119 Changed array bounds in type.h to ir_node*. This allows to
120 construct array bounds that are complex constant expressions
121 simpler. Further dynamic array bounds can be displayed.
122 Comment in ircons.c extended: undefined values in start_block.
125 ifdef'ed all uses of gmp in tv.c away. Optimizations for
126 mode_Z no more supported, as well as constants of that mode.
129 Dokumentation in ir_dump
130 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
131 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
134 We need an entity for the array elements for the Sel nodes. This
135 entity should be stored in the array type. Changed constructor
136 parameters: include array element type. Entity for elements is built
141 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
144 Added list of member entites to union. unioned_types and delimiters
145 are superfluous now -- removed.
146 Rationale: we want to express selection of a union member as a Sel
147 node. for this we need to have entities. The entities contain the
148 unioned type and have as name the delimiters...
151 Changed Makefile/MakeTargets to install headers and libraries
155 Changed Makefile and Configure scripts to produce a proper tar file
156 for distribution (libfirm-VERSION.tar)
157 Use 'make distrib' instead of 'make dist'
160 Changed implementation of tr module. With this I also changed the
161 interface!! Type casts are unnecessary now, but some access funcions
165 ======================================================================
166 ==================== New version: 0.3.0 ==============================
167 ======================================================================
173 added creation of a tar archive for distribution
174 replaced ir/.dummy.in by ir/Makefile.in
177 Changed equivalent_node() and copy_preds() so that the end block
178 is not optimized away if it has no real predecessors. This fixes
179 the problem with the while examples.
180 Added while_example in Makefile
183 Fooled around with if_while_example: Why does cse make it abort?
184 Cse removes path to End node, Bad remains as pred of Endblock.
185 The block walker can't deal with this.
186 Made new example with only loop: while_example.
189 added auto documentation in Makefiles, configure, etc
190 example in ir/ir/ircons.c - much must be added
191 creation of documentation by 'make autodoc' in architecture directory
194 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
195 replaced some C++ style comments (//) by standard C comments /**/
198 - configure (with some features, see --help for more)
199 - make [depend | tags | install]
200 - make [run] in testprograms
202 - compilation on SunOS
204 - automatic call of autoconf if required
207 More colours in vcg output.
208 Fixed bug: cse found that start block equals it's
209 first successor as both have the Start block as predecessor.
210 This only happens for local_optimize_graph() as during construction
211 the Start block is not entered in the value table.
212 Changed implementation: irgmod: local_optimize_graph() did not
213 empty the hash table with the irnodes for cse. This might cause that
214 cse turns up with a node that seems better but was removed from the
215 graph in an earlier optimization phase.
216 Removed old #if 1 from ircons.c
217 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
218 Optimizes blocks that had bad predecessors.
223 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
224 Added a module deb_info in debug.h. Adapted makefile. Added example
226 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
228 Removed inabled code for dead node elimination in irgopt.h.
229 Renamed some missnamed access routines (_of_). Macros with old names
230 are in old_fctnames.h.
231 Edited makefiles to remove #* and *.flc.
234 Some minor bugfixes...
237 After compacting of in arrays in dead_node_elimination
238 merge blocks and remove Phis with one pred.
241 Freeing of obstack in dead_node_elimination commented in.
242 Compacting in arrays of Block and Phi nodes in dead_node_
247 added set/get_SymConst_type_or_id in irnode.h
248 added field offset to entity in entity.h
249 added field size to type_class in type.h
250 include "gmp.h" in tv.h with "" instead <>
253 Some changes to make the lib better portable
256 Initialize max_node_nr in irprog.
259 Now outputs warning if faulty type in irdump, dump_type_info.
260 Explicit string termination in irdump, vcg_open.
263 Added external to declaration of irp.
264 Added typedef before pns and pnc_number.
265 irmode.c, init_mode(): We need to memset all new modes as
266 tarval_vrfy reads fields before they are initialized: It
267 compares to min/max when tarvals for min/max are allocated!
270 Changed parameter of Methods in type.h and type.c from
271 class to clss. Class is a C++ keyword.
274 Changed some testprograms to accomodate Uebprakt.
277 Finished implementation of dump_all_types.
278 Added new testprogram inheritance_example.
281 Added seven access routines in type.[hc]:
282 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
283 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
284 Fixed the type_walk_2 for those seven routines.
287 Added irdump routine dump_all_types.
288 Did changes to irprog, type, typewalk to achieve this.
289 typewalk needs to walk along members, sub and supertypes, this
290 is still missing! irdump then needs to output these edges.
292 ======================================================================
293 ==================== New version: 0.2.5 ==============================
294 ======================================================================
297 Made new Version: 0.2.5
299 15.8.2000 Goetz until 3.9.00
300 Separated irnode.h and many others into two files: one public
302 Added funcionality to extract headers for lib.
305 type_dump also dumps irg->ent
306 if_example: corrected nr of locals
309 irgopt: Correct copy of self pointer in start block.
310 irgopt: Correct treatment of loops: pre function in walker
311 breaks all possible loops in Phi and Block nodes.
312 irr_loop_example: wrong Return statement
313 Now I fixed all but one error: in memory_example.
314 This error showed a conceptual problem, so I wrote
315 a slightly different algorithm. This now runs for
317 dead_node_example: cse is buggy!! merges start and the
321 looking at bug in dead_node_elimination.
323 irnode: all get_..._arr functions changed
324 ircons: new_r_Block: set matured flag.
325 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
326 adapted call_str_example to new concepts.
329 Implemented simpler Phi construction algorithm that constructs
330 correct code for three_cfpred_example in ircons. This algorithm
331 generates more Id nodes than the original algorithm and therefore
333 Also made some changes to optimizations of Not.
336 Fixed a bug, caused by the recursive use in type.h and entity.h.
337 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
338 Fixed a problem in if_while testprogram, so it now works.
341 Fixed bug in optimize(). Returned Null instead n if
342 get_optimize() == false.
345 Added some access routines in type.[hc]. Solved a recursive definition
346 of type_class struct, entity struct and type union.
349 Separated entity header into pure functional header and header
353 ... a bunch small changes not documented
356 Changed output of oo_prog_example: now uses the internal list
357 of all irgs. Had to implement some of the access routines for
358 that. Also fixed a bug in irdump. Main routines did not use
359 current_ir_graph properly.
362 Implemented some missing parts in irgopt.
363 Added field irg to entity. Only valid if entity is a method.
364 Had to resove a cyclic de[endency between irgraph.h and entity.h
366 Added fields sub and super to type_class for inheritance.
367 Added field main_irg to irprog.
370 Fixed some bugs in irgopt.c
371 Added some missing 'get_new_node' methods, so the new obstack contains
375 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
376 Solved some copy'n'paste problems. Deleted most debug-code!
377 Added comments to several files.
380 Fixed bug in _r_ constructors for all four Div operations.
381 Fixed bug in turn_into_tuple: didn't remember the block.
382 Tested transform_node.
385 Fixed some testprograms to new semantics of firm.
386 Added testprogram global_var_example.
387 Fixed a bug in irop: Size of Sel node was (entity *) instead of
388 sel_attr. Therefor array_heap_example aborted.
389 Also found a missing break in typewalk, case iro_Alloc.
390 Added a construct that unifies all things constructed by the lib
391 and needed to represent a program: irprog.ch
392 This contains a list of all types as well as a list of all ir graphs.
393 I added calls to initialization and constructors so that this is constructed
394 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
395 Removed strange block struct and constructor from ircons.c.
396 Moved routines for automatic Phi construction from irgmod to ircons.
397 Sorted functions in ircons to reflect the different interfaces.
398 Renamed dataseg to globals to be conformant with documentation.
399 Added conservation of current_ir_graph to irgopt.c.
400 Corrected bug in Makefiles: wrong path to directory ./inlude.
403 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
404 We should change the naming of the Block constructor.
405 Removed acces routines to attr. "closed" of Block.
406 Removed second implementation of new_ir_node from ircons and some comments
407 concerned with the now resolved cyclic dependency.
408 Fixed some bugs in irgopt so that the compilation goes through.
411 Changed the irnode attribut 'visit' into 'visited'.
412 Added some access functions, like get/set_irn_visit etc.
415 Renamed some access funtion in irgraph.*.
416 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
417 Added two attributes to the irgraph struct. The visited flags belongs
418 to a ir graph, not to a whole program.
421 A new optimization has been finished. The dead-node-elimination copies
422 the existing ir graph from one opstack to another. While walking the
423 graph, only the reachable nodes will be copied, so the "dead-nodes"
424 (unreachable in the controlflow) are removed.
427 Solved some problems in the 'copy_node' function. The in array was not
428 as easy as it seamed.
431 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
432 optimization, which is needed in the paramter list of 'irg_walk'.
435 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
436 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
440 Removed some files from the archive, after dependencies and usage are
442 - 'ir/common/strerror.c'
444 - 'ir/ident/xx_ident.h'
445 an empty file, only included by 'ident.c', but never used;
446 - 'ir/tv/label.c' and
448 contained a numeric counter;
449 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
450 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
451 In the old fiasco compiler, the label thing is used in the backend.
452 Search for 'babil' to see the usage.
453 Also removed the two attributes 'lab' and 'used' in the tarval struct.
456 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
457 afterwards some recursive includes, so libfirm works again.
460 Did a lot of changes, which I never commented until now (4.7.00).
462 * Added new result to Start node: Pointer to global data segment.
463 * Extended Semantics of SymConst node to represent information for the
465 * Added arithmeitc nodes (Shrs, Minus ...)
467 Rearranged the directory structure and adjusted the makefiles.
468 The directories contain:
469 ir: everything for the intermediate representation (better: src?)
470 /ir: the ir itself, and standard optimizations.
471 /tv: the target value module
472 /tr: the type and entity representation
473 /adt: abstract data types
474 /common: stuff needed by all other dirs
475 /debug: debugging Unterstuetzung
477 include: external files needen as includes
478 testprograms: examples to test the lib.
480 The makefiles generate files with extension .d that contain the dependencies
484 Added access routine to attribute link of irnode in irnode.ch.
485 Added get_negated_pnc to irnode.ch.
488 Added an iterator in iropt that calls the optimization for all nodes.
489 Copied optimize's code to optimize_in_place and removed deallocations.
490 Made set_irn_n in irnode.c public.
491 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
492 are allowded as cfgpredecessors to represent dead "incoming" control
494 Added call to optimize_in_place in mature_block. Is this useful?
497 Changed tests from comparing enums to comparing pointers. This is more
498 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
499 now get_irn_op == op_And
502 Compared equivalent_value to the one in the original fiasco.
503 Added a test in case iro_And.
504 Changed implementation of iro_Div. Added routines turn_into_tuple
505 and set_irn_op() in irgmod/irnode.
506 Changed implementation of irn_Minus (although commented out).
507 Now all features are ported or documented for this function.
510 Compared computed_value to the one in the original fiasco.
511 Added one further optimization in case iro_Proj.
512 Now all features are ported for this function.
515 Updated comments in ircons.h.
518 Changed possible attribute of SymConst from type_class to type.
519 SymConst size could be the size of a union, array, ...
522 Implemented two dumpers that dump type information and a graph with
526 Implemented a walker that walks over the type informatin that can
527 be reached from an ir node.
528 Added routine get_kind(firm_thing) in common.h, Added file common.c.
529 Added files typewalk.ch and routines to irdump.
530 Added visited flags and initialization to entity and all types.
531 Implemented some of the missing access routines in type.c, entity.c
534 Implemented constructor for ShrA.
536 Added routine that iterates the graph and verifies all nodes.
537 Added Phi_in stack to irgraph. This allows to build several
538 graphs at once with respect to the Phi building algorithm.
541 Implemented dumper for control flow graphs. Changed irr_* and dead_*
542 examples to dump cfg.
545 Implemeted explicit stack for the Phi node generation. See ircons.c.
548 added include string.h in xoprintf.c to get rid of warning:
549 implicit declaration of function `bcopy'
553 Added more cases to equivalent_node.
554 Portet gigo, identify, identify_remember.
555 The set/pset library can not handle several hash tables. At least,
556 compiling several procedures causes a segmentation fault during access
557 to the tables (oo_program_example). Need to work on this.
558 transform_node still needs to be ported.
559 some cases in equivalent_node are still missing.
561 To get it running I had to remove the call to optimize in the
562 new_Block constructor. It can only be called when the Block is
566 Introduced a walker that walks only over blocks. The asserts
567 might be too strict for general graphs, but so far it works.
568 For the walker I introduced an additional flag in the attribute
569 of Blocks, an a global block_visited variable (in irgraph.h).
570 Furhter I modularized dump_ir_node, implemented dump_ir_graph
571 with the existing walker, and added new routines to output a
573 Changed the examples to call the new dump routine.
576 Added auxiliary routines to ir_node:
577 skip_Proj, skip_Nop, is_Bad ...
578 Changed access routines to use get_irn_n instead of explicit array
579 accesses. Changed get_irn_n to call skip_Id, so that the access routines
580 never will return Id nodes.
583 Repaired Phi computation, changed new_r_Phi_in. Added test program to
584 test irregular controlflow.
587 Updated optimizations computed_value and equivalent_node to new
588 Syntax of FIRM nodes and to use access routines.
589 Added routine skip_Proj in irnode.
591 2.2.2000 Boris Boesler
592 Added files irgwalk.c and irgwalk.h. They include a simple function to
593 traverse an ir graph and execute pre and post functions to current node.
596 Added arrays with parameters and result types to the type informtion
597 of a procedure. This is needed for the code generation. Also added
598 the corresponding access routines.
599 Adapted the testprograms.
602 Found a bug / complication: the call order
603 get_value (makes Phi0, put's it into graph_arr)
604 set_value (overwrites Phi0 in graph_arr)
605 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
607 fails. Added test wether graph_arr is already set in phi_merge.
609 Added tons of comments to explain Phi generation -- the stack hack.
613 irdump now outputs the pnc_number for projs of Cmp nodes.
614 Added routine to access the pnc_string.
617 Added result "dataseg" to Start node, with all it's consequences.
618 We need this for the compiler lab to translate global variables.
619 Now they can be selected from the data segment, and the start
620 node supplies the pointer to this segment.
621 These changes are guarded by preprocessor variable UEBPRAKT in
623 Changed files: common.h, irgraph.ch, irnode.h
627 removed array_example, added array-heap_example and
628 array-stack_example and adapted makefile.
630 Entity now also allows type_method as owner. This is to model
631 the stack, Sel nodes that select a variable (array) from the
632 stack need an entity that describes what they select. This
633 entity gets the type of the enclosing procedure as owner.
636 Added future access routines in `irmode.[ch]' as comments,
637 that all attributes in the ir_mode struct can be user-defined.
638 Added access routines in `irgraph.[ch]', for all attributes.
641 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
642 Added `irvrfy.[ch]' to MAKEFILE
643 Added "inline" before access routines in `irnode.h', that no warnings
644 will appear furthermore.
645 Added three more access routines in `irmode.[ch]':
646 struct tarval *get_min_of_mode (ir_mode *mode);
647 struct tarval *get_max_of_mode (ir_mode *mode);
648 struct tarval *get_null_of_mode (ir_mode *mode);
651 Adaption of Alloc, Sel and Entity to new types:
652 Changed array_example to use type instead of type_class.
653 Changed entity to allow all types as owner instead of
654 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
655 Changed alloc to allow allocating variables of any type instead of
657 Adapted all testprograms to avoid warnings.
659 removed dtest ... from Makefile, replaced by test.
662 Added "run" to makefile, added array_example to makefile of testprograms.
663 Corrected testprogram array
664 Changed assert in irvrfy -- Conv.
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