2 Extendend "comfortable" construction interface by some methods
3 serving as simple shortcuts.
6 Added a class type to irgs. This class type is to be used as owner
7 for local entities of the procedure. This are all entities allocated
8 for each execution of the procedure.
9 The class type is allocated automatically by new_ir_graph(). Access
10 routines to get this type are in irgraph.h.
11 We chose a class type as this allows to represent "inner" procedures
13 Adapted array-stack-example.
16 irdump outputs nodeids instead of pointers for labels of nodes.
17 With a preprocessor flag in common.h this can be turned off.
20 Added an Id tag to every .c and .h file
23 Changed SSA constuction for exception control flow.
24 If PRECISE_EXC_CONTEXT is used Phi nodes will use the values
25 valid when the execption operation was allocated. This increases
26 the memory consuption of the construction algorithm by
30 Added method to replace in array of a node in irnode.c/h
31 Added functionality to irgmod:
32 * collect all Phi nodes as link-list in the Blocks link field
33 * collect all Proj nodes as link-list in node producing the tuple.
34 * Seperate a Block into two
35 Added inlining transformation in irgopt.h
36 Improved output of dump_ir_block_graph. Now also dumps nodes that
37 don't belong to a block.
38 Added flag opt_unreachable_code, opt_inline.
39 Changed irvrfy so that it accepts nodes with Bad predecessors.
42 renamed get_type_nameid to get_type_ident
45 Bugfix: dead node elimination did not replace the hash table
49 Added routine remove_irp_irg.
50 Changed comment to free_ir_graph.
53 Added routine to free irgraphs.
56 Improved add routines to sub, supertype in type.c
59 Added implementation of overwrites stuff.
62 Implemented stuff to change the type graph. See
63 typegmod.h and tpop.h for basic documentation of the change.
64 There now exists a type of kind type_id. If this appears
65 externally this is a bug.
68 Added some new access routines to types.
69 List of overwritten fields for entities.
70 Removed a bug in irnode.
73 Added a routine to set the mangled entity name.
74 Added two routines to copy entites.
77 Entities now have two more flags, for visibility and allocation mode.
78 Types that have a layout have a flag indicating whether the layout is
82 We distinguish three kinds of Cond nodes. These can be distinguished
83 by the mode of the selector operand and an internal flag of type cond_kind.
84 First we distinguish binary Conds and switch Conds.
85 A binary Cond has as selector a boolean value. Proj(0) projects the control
86 flow for case "False", Proj(1) the control flow for "True". A binary Cond
87 is recognized by the boolean selector.
88 The switch Cond has as selector an unsigned integer. It produces as result
89 an n+1 Tuple (cf0, ... , cfn) of control flows.
90 We differ two flavours of this Cond. The first, the dense Cond, passes
91 control along output i if the selector value is i, 0 <= i <= n. If the
92 selector value is >n it passes control along output n.
93 The second Cond flavor differes in the treatment of cases not specified in
94 the source program. It magically knows about the existence of Proj nodes.
95 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
96 exists. Else it passes control along output n (even if this Proj does not
97 exist.) This Cond we call "fragmentary". There is a special constructor
98 new_defaultProj that automatically sets the flavor.
99 The two switch flavors are distinguished by a flag of type cond_kind.
100 Default flavor is "dense"
104 tv now implements Minus, Abs.
105 iropt now optimizes these and Div, Mod, Quot, DivMod.
106 Still missing: Shrs, Rot.
107 tarval_shr somtimes performs shrs, depending on the compiler/system!!
108 If the ArmRoq implementation is faulty there might appear errors.
111 Changed ircons: If undefined values are used the Phi construction
112 inserts a constant with value tarval_bad.
115 Changed array bounds in type.h to ir_node*. This allows to
116 construct array bounds that are complex constant expressions
117 simpler. Further dynamic array bounds can be displayed.
118 Comment in ircons.c extended: undefined values in start_block.
121 ifdef'ed all uses of gmp in tv.c away. Optimizations for
122 mode_Z no more supported, as well as constants of that mode.
125 Dokumentation in ir_dump
126 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
127 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
130 We need an entity for the array elements for the Sel nodes. This
131 entity should be stored in the array type. Changed constructor
132 parameters: include array element type. Entity for elements is built
137 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
140 Added list of member entites to union. unioned_types and delimiters
141 are superfluous now -- removed.
142 Rationale: we want to express selection of a union member as a Sel
143 node. for this we need to have entities. The entities contain the
144 unioned type and have as name the delimiters...
147 Changed Makefile/MakeTargets to install headers and libraries
151 Changed Makefile and Configure scripts to produce a proper tar file
152 for distribution (libfirm-VERSION.tar)
153 Use 'make distrib' instead of 'make dist'
156 Changed implementation of tr module. With this I also changed the
157 interface!! Type casts are unnecessary now, but some access funcions
161 ======================================================================
162 ==================== New version: 0.3.0 ==============================
163 ======================================================================
169 added creation of a tar archive for distribution
170 replaced ir/.dummy.in by ir/Makefile.in
173 Changed equivalent_node() and copy_preds() so that the end block
174 is not optimized away if it has no real predecessors. This fixes
175 the problem with the while examples.
176 Added while_example in Makefile
179 Fooled around with if_while_example: Why does cse make it abort?
180 Cse removes path to End node, Bad remains as pred of Endblock.
181 The block walker can't deal with this.
182 Made new example with only loop: while_example.
185 added auto documentation in Makefiles, configure, etc
186 example in ir/ir/ircons.c - much must be added
187 creation of documentation by 'make autodoc' in architecture directory
190 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
191 replaced some C++ style comments (//) by standard C comments /**/
194 - configure (with some features, see --help for more)
195 - make [depend | tags | install]
196 - make [run] in testprograms
198 - compilation on SunOS
200 - automatic call of autoconf if required
203 More colours in vcg output.
204 Fixed bug: cse found that start block equals it's
205 first successor as both have the Start block as predecessor.
206 This only happens for local_optimize_graph() as during construction
207 the Start block is not entered in the value table.
208 Changed implementation: irgmod: local_optimize_graph() did not
209 empty the hash table with the irnodes for cse. This might cause that
210 cse turns up with a node that seems better but was removed from the
211 graph in an earlier optimization phase.
212 Removed old #if 1 from ircons.c
213 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
214 Optimizes blocks that had bad predecessors.
219 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
220 Added a module deb_info in debug.h. Adapted makefile. Added example
222 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
224 Removed inabled code for dead node elimination in irgopt.h.
225 Renamed some missnamed access routines (_of_). Macros with old names
226 are in old_fctnames.h.
227 Edited makefiles to remove #* and *.flc.
230 Some minor bugfixes...
233 After compacting of in arrays in dead_node_elimination
234 merge blocks and remove Phis with one pred.
237 Freeing of obstack in dead_node_elimination commented in.
238 Compacting in arrays of Block and Phi nodes in dead_node_
243 added set/get_SymConst_type_or_id in irnode.h
244 added field offset to entity in entity.h
245 added field size to type_class in type.h
246 include "gmp.h" in tv.h with "" instead <>
249 Some changes to make the lib better portable
252 Initialize max_node_nr in irprog.
255 Now outputs warning if faulty type in irdump, dump_type_info.
256 Explicit string termination in irdump, vcg_open.
259 Added external to declaration of irp.
260 Added typedef before pns and pnc_number.
261 irmode.c, init_mode(): We need to memset all new modes as
262 tarval_vrfy reads fields before they are initialized: It
263 compares to min/max when tarvals for min/max are allocated!
266 Changed parameter of Methods in type.h and type.c from
267 class to clss. Class is a C++ keyword.
270 Changed some testprograms to accomodate Uebprakt.
273 Finished implementation of dump_all_types.
274 Added new testprogram inheritance_example.
277 Added seven access routines in type.[hc]:
278 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
279 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
280 Fixed the type_walk_2 for those seven routines.
283 Added irdump routine dump_all_types.
284 Did changes to irprog, type, typewalk to achieve this.
285 typewalk needs to walk along members, sub and supertypes, this
286 is still missing! irdump then needs to output these edges.
288 ======================================================================
289 ==================== New version: 0.2.5 ==============================
290 ======================================================================
293 Made new Version: 0.2.5
295 15.8.2000 Goetz until 3.9.00
296 Separated irnode.h and many others into two files: one public
298 Added funcionality to extract headers for lib.
301 type_dump also dumps irg->ent
302 if_example: corrected nr of locals
305 irgopt: Correct copy of self pointer in start block.
306 irgopt: Correct treatment of loops: pre function in walker
307 breaks all possible loops in Phi and Block nodes.
308 irr_loop_example: wrong Return statement
309 Now I fixed all but one error: in memory_example.
310 This error showed a conceptual problem, so I wrote
311 a slightly different algorithm. This now runs for
313 dead_node_example: cse is buggy!! merges start and the
317 looking at bug in dead_node_elimination.
319 irnode: all get_..._arr functions changed
320 ircons: new_r_Block: set matured flag.
321 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
322 adapted call_str_example to new concepts.
325 Implemented simpler Phi construction algorithm that constructs
326 correct code for three_cfpred_example in ircons. This algorithm
327 generates more Id nodes than the original algorithm and therefore
329 Also made some changes to optimizations of Not.
332 Fixed a bug, caused by the recursive use in type.h and entity.h.
333 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
334 Fixed a problem in if_while testprogram, so it now works.
337 Fixed bug in optimize(). Returned Null instead n if
338 get_optimize() == false.
341 Added some access routines in type.[hc]. Solved a recursive definition
342 of type_class struct, entity struct and type union.
345 Separated entity header into pure functional header and header
349 ... a bunch small changes not documented
352 Changed output of oo_prog_example: now uses the internal list
353 of all irgs. Had to implement some of the access routines for
354 that. Also fixed a bug in irdump. Main routines did not use
355 current_ir_graph properly.
358 Implemented some missing parts in irgopt.
359 Added field irg to entity. Only valid if entity is a method.
360 Had to resove a cyclic de[endency between irgraph.h and entity.h
362 Added fields sub and super to type_class for inheritance.
363 Added field main_irg to irprog.
366 Fixed some bugs in irgopt.c
367 Added some missing 'get_new_node' methods, so the new obstack contains
371 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
372 Solved some copy'n'paste problems. Deleted most debug-code!
373 Added comments to several files.
376 Fixed bug in _r_ constructors for all four Div operations.
377 Fixed bug in turn_into_tuple: didn't remember the block.
378 Tested transform_node.
381 Fixed some testprograms to new semantics of firm.
382 Added testprogram global_var_example.
383 Fixed a bug in irop: Size of Sel node was (entity *) instead of
384 sel_attr. Therefor array_heap_example aborted.
385 Also found a missing break in typewalk, case iro_Alloc.
386 Added a construct that unifies all things constructed by the lib
387 and needed to represent a program: irprog.ch
388 This contains a list of all types as well as a list of all ir graphs.
389 I added calls to initialization and constructors so that this is constructed
390 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
391 Removed strange block struct and constructor from ircons.c.
392 Moved routines for automatic Phi construction from irgmod to ircons.
393 Sorted functions in ircons to reflect the different interfaces.
394 Renamed dataseg to globals to be conformant with documentation.
395 Added conservation of current_ir_graph to irgopt.c.
396 Corrected bug in Makefiles: wrong path to directory ./inlude.
399 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
400 We should change the naming of the Block constructor.
401 Removed acces routines to attr. "closed" of Block.
402 Removed second implementation of new_ir_node from ircons and some comments
403 concerned with the now resolved cyclic dependency.
404 Fixed some bugs in irgopt so that the compilation goes through.
407 Changed the irnode attribut 'visit' into 'visited'.
408 Added some access functions, like get/set_irn_visit etc.
411 Renamed some access funtion in irgraph.*.
412 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
413 Added two attributes to the irgraph struct. The visited flags belongs
414 to a ir graph, not to a whole program.
417 A new optimization has been finished. The dead-node-elimination copies
418 the existing ir graph from one opstack to another. While walking the
419 graph, only the reachable nodes will be copied, so the "dead-nodes"
420 (unreachable in the controlflow) are removed.
423 Solved some problems in the 'copy_node' function. The in array was not
424 as easy as it seamed.
427 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
428 optimization, which is needed in the paramter list of 'irg_walk'.
431 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
432 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
436 Removed some files from the archive, after dependencies and usage are
438 - 'ir/common/strerror.c'
440 - 'ir/ident/xx_ident.h'
441 an empty file, only included by 'ident.c', but never used;
442 - 'ir/tv/label.c' and
444 contained a numeric counter;
445 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
446 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
447 In the old fiasco compiler, the label thing is used in the backend.
448 Search for 'babil' to see the usage.
449 Also removed the two attributes 'lab' and 'used' in the tarval struct.
452 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
453 afterwards some recursive includes, so libfirm works again.
456 Did a lot of changes, which I never commented until now (4.7.00).
458 * Added new result to Start node: Pointer to global data segment.
459 * Extended Semantics of SymConst node to represent information for the
461 * Added arithmeitc nodes (Shrs, Minus ...)
463 Rearranged the directory structure and adjusted the makefiles.
464 The directories contain:
465 ir: everything for the intermediate representation (better: src?)
466 /ir: the ir itself, and standard optimizations.
467 /tv: the target value module
468 /tr: the type and entity representation
469 /adt: abstract data types
470 /common: stuff needed by all other dirs
471 /debug: debugging Unterstuetzung
473 include: external files needen as includes
474 testprograms: examples to test the lib.
476 The makefiles generate files with extension .d that contain the dependencies
480 Added access routine to attribute link of irnode in irnode.ch.
481 Added get_negated_pnc to irnode.ch.
484 Added an iterator in iropt that calls the optimization for all nodes.
485 Copied optimize's code to optimize_in_place and removed deallocations.
486 Made set_irn_n in irnode.c public.
487 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
488 are allowded as cfgpredecessors to represent dead "incoming" control
490 Added call to optimize_in_place in mature_block. Is this useful?
493 Changed tests from comparing enums to comparing pointers. This is more
494 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
495 now get_irn_op == op_And
498 Compared equivalent_value to the one in the original fiasco.
499 Added a test in case iro_And.
500 Changed implementation of iro_Div. Added routines turn_into_tuple
501 and set_irn_op() in irgmod/irnode.
502 Changed implementation of irn_Minus (although commented out).
503 Now all features are ported or documented for this function.
506 Compared computed_value to the one in the original fiasco.
507 Added one further optimization in case iro_Proj.
508 Now all features are ported for this function.
511 Updated comments in ircons.h.
514 Changed possible attribute of SymConst from type_class to type.
515 SymConst size could be the size of a union, array, ...
518 Implemented two dumpers that dump type information and a graph with
522 Implemented a walker that walks over the type informatin that can
523 be reached from an ir node.
524 Added routine get_kind(firm_thing) in common.h, Added file common.c.
525 Added files typewalk.ch and routines to irdump.
526 Added visited flags and initialization to entity and all types.
527 Implemented some of the missing access routines in type.c, entity.c
530 Implemented constructor for ShrA.
532 Added routine that iterates the graph and verifies all nodes.
533 Added Phi_in stack to irgraph. This allows to build several
534 graphs at once with respect to the Phi building algorithm.
537 Implemented dumper for control flow graphs. Changed irr_* and dead_*
538 examples to dump cfg.
541 Implemeted explicit stack for the Phi node generation. See ircons.c.
544 added include string.h in xoprintf.c to get rid of warning:
545 implicit declaration of function `bcopy'
549 Added more cases to equivalent_node.
550 Portet gigo, identify, identify_remember.
551 The set/pset library can not handle several hash tables. At least,
552 compiling several procedures causes a segmentation fault during access
553 to the tables (oo_program_example). Need to work on this.
554 transform_node still needs to be ported.
555 some cases in equivalent_node are still missing.
557 To get it running I had to remove the call to optimize in the
558 new_Block constructor. It can only be called when the Block is
562 Introduced a walker that walks only over blocks. The asserts
563 might be too strict for general graphs, but so far it works.
564 For the walker I introduced an additional flag in the attribute
565 of Blocks, an a global block_visited variable (in irgraph.h).
566 Furhter I modularized dump_ir_node, implemented dump_ir_graph
567 with the existing walker, and added new routines to output a
569 Changed the examples to call the new dump routine.
572 Added auxiliary routines to ir_node:
573 skip_Proj, skip_Nop, is_Bad ...
574 Changed access routines to use get_irn_n instead of explicit array
575 accesses. Changed get_irn_n to call skip_Id, so that the access routines
576 never will return Id nodes.
579 Repaired Phi computation, changed new_r_Phi_in. Added test program to
580 test irregular controlflow.
583 Updated optimizations computed_value and equivalent_node to new
584 Syntax of FIRM nodes and to use access routines.
585 Added routine skip_Proj in irnode.
587 2.2.2000 Boris Boesler
588 Added files irgwalk.c and irgwalk.h. They include a simple function to
589 traverse an ir graph and execute pre and post functions to current node.
592 Added arrays with parameters and result types to the type informtion
593 of a procedure. This is needed for the code generation. Also added
594 the corresponding access routines.
595 Adapted the testprograms.
598 Found a bug / complication: the call order
599 get_value (makes Phi0, put's it into graph_arr)
600 set_value (overwrites Phi0 in graph_arr)
601 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
603 fails. Added test wether graph_arr is already set in phi_merge.
605 Added tons of comments to explain Phi generation -- the stack hack.
609 irdump now outputs the pnc_number for projs of Cmp nodes.
610 Added routine to access the pnc_string.
613 Added result "dataseg" to Start node, with all it's consequences.
614 We need this for the compiler lab to translate global variables.
615 Now they can be selected from the data segment, and the start
616 node supplies the pointer to this segment.
617 These changes are guarded by preprocessor variable UEBPRAKT in
619 Changed files: common.h, irgraph.ch, irnode.h
623 removed array_example, added array-heap_example and
624 array-stack_example and adapted makefile.
626 Entity now also allows type_method as owner. This is to model
627 the stack, Sel nodes that select a variable (array) from the
628 stack need an entity that describes what they select. This
629 entity gets the type of the enclosing procedure as owner.
632 Added future access routines in `irmode.[ch]' as comments,
633 that all attributes in the ir_mode struct can be user-defined.
634 Added access routines in `irgraph.[ch]', for all attributes.
637 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
638 Added `irvrfy.[ch]' to MAKEFILE
639 Added "inline" before access routines in `irnode.h', that no warnings
640 will appear furthermore.
641 Added three more access routines in `irmode.[ch]':
642 struct tarval *get_min_of_mode (ir_mode *mode);
643 struct tarval *get_max_of_mode (ir_mode *mode);
644 struct tarval *get_null_of_mode (ir_mode *mode);
647 Adaption of Alloc, Sel and Entity to new types:
648 Changed array_example to use type instead of type_class.
649 Changed entity to allow all types as owner instead of
650 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
651 Changed alloc to allow allocating variables of any type instead of
653 Adapted all testprograms to avoid warnings.
655 removed dtest ... from Makefile, replaced by test.
658 Added "run" to makefile, added array_example to makefile of testprograms.
659 Corrected testprogram array
660 Changed assert in irvrfy -- Conv.
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