2 Asserts in irvrfy that verify the mode of Proj nodes. For Start,
3 Call, Return they check the corresponding function type! Corrected
7 Some access routines for visited flags in entity.h, irnode.h,
8 bug in oo_program_example.
11 Removed all obsolete Makefiles
14 Added support for constant entities. A new example program illustrates
15 their use. Extended dumper routines to dump constant values.
18 Extendend "comfortable" construction interface by some methods
19 serving as simple shortcuts.
22 Added a class type to irgs. This class type is to be used as owner
23 for local entities of the procedure. This are all entities allocated
24 for each execution of the procedure.
25 The class type is allocated automatically by new_ir_graph(). Access
26 routines to get this type are in irgraph.h.
27 We chose a class type as this allows to represent "inner" procedures
29 Adapted array-stack-example.
32 irdump outputs nodeids instead of pointers for labels of nodes.
33 With a preprocessor flag in common.h this can be turned off.
36 Added an Id tag to every .c and .h file
39 Changed SSA constuction for exception control flow.
40 If PRECISE_EXC_CONTEXT is used Phi nodes will use the values
41 valid when the execption operation was allocated. This increases
42 the memory consuption of the construction algorithm by
46 Added method to replace in array of a node in irnode.c/h
47 Added functionality to irgmod:
48 * collect all Phi nodes as link-list in the Blocks link field
49 * collect all Proj nodes as link-list in node producing the tuple.
50 * Seperate a Block into two
51 Added inlining transformation in irgopt.h
52 Improved output of dump_ir_block_graph. Now also dumps nodes that
53 don't belong to a block.
54 Added flag opt_unreachable_code, opt_inline.
55 Changed irvrfy so that it accepts nodes with Bad predecessors.
58 renamed get_type_nameid to get_type_ident
61 Bugfix: dead node elimination did not replace the hash table
65 Added routine remove_irp_irg.
66 Changed comment to free_ir_graph.
69 Added routine to free irgraphs.
72 Improved add routines to sub, supertype in type.c
75 Added implementation of overwrites stuff.
78 Implemented stuff to change the type graph. See
79 typegmod.h and tpop.h for basic documentation of the change.
80 There now exists a type of kind type_id. If this appears
81 externally this is a bug.
84 Added some new access routines to types.
85 List of overwritten fields for entities.
86 Removed a bug in irnode.
89 Added a routine to set the mangled entity name.
90 Added two routines to copy entites.
93 Entities now have two more flags, for visibility and allocation mode.
94 Types that have a layout have a flag indicating whether the layout is
98 We distinguish three kinds of Cond nodes. These can be distinguished
99 by the mode of the selector operand and an internal flag of type cond_kind.
100 First we distinguish binary Conds and switch Conds.
101 A binary Cond has as selector a boolean value. Proj(0) projects the control
102 flow for case "False", Proj(1) the control flow for "True". A binary Cond
103 is recognized by the boolean selector.
104 The switch Cond has as selector an unsigned integer. It produces as result
105 an n+1 Tuple (cf0, ... , cfn) of control flows.
106 We differ two flavours of this Cond. The first, the dense Cond, passes
107 control along output i if the selector value is i, 0 <= i <= n. If the
108 selector value is >n it passes control along output n.
109 The second Cond flavor differes in the treatment of cases not specified in
110 the source program. It magically knows about the existence of Proj nodes.
111 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
112 exists. Else it passes control along output n (even if this Proj does not
113 exist.) This Cond we call "fragmentary". There is a special constructor
114 new_defaultProj that automatically sets the flavor.
115 The two switch flavors are distinguished by a flag of type cond_kind.
116 Default flavor is "dense"
120 tv now implements Minus, Abs.
121 iropt now optimizes these and Div, Mod, Quot, DivMod.
122 Still missing: Shrs, Rot.
123 tarval_shr somtimes performs shrs, depending on the compiler/system!!
124 If the ArmRoq implementation is faulty there might appear errors.
127 Changed ircons: If undefined values are used the Phi construction
128 inserts a constant with value tarval_bad.
131 Changed array bounds in type.h to ir_node*. This allows to
132 construct array bounds that are complex constant expressions
133 simpler. Further dynamic array bounds can be displayed.
134 Comment in ircons.c extended: undefined values in start_block.
137 ifdef'ed all uses of gmp in tv.c away. Optimizations for
138 mode_Z no more supported, as well as constants of that mode.
141 Dokumentation in ir_dump
142 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
143 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
146 We need an entity for the array elements for the Sel nodes. This
147 entity should be stored in the array type. Changed constructor
148 parameters: include array element type. Entity for elements is built
153 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
156 Added list of member entites to union. unioned_types and delimiters
157 are superfluous now -- removed.
158 Rationale: we want to express selection of a union member as a Sel
159 node. for this we need to have entities. The entities contain the
160 unioned type and have as name the delimiters...
163 Changed Makefile/MakeTargets to install headers and libraries
167 Changed Makefile and Configure scripts to produce a proper tar file
168 for distribution (libfirm-VERSION.tar)
169 Use 'make distrib' instead of 'make dist'
172 Changed implementation of tr module. With this I also changed the
173 interface!! Type casts are unnecessary now, but some access funcions
177 ======================================================================
178 ==================== New version: 0.3.0 ==============================
179 ======================================================================
185 added creation of a tar archive for distribution
186 replaced ir/.dummy.in by ir/Makefile.in
189 Changed equivalent_node() and copy_preds() so that the end block
190 is not optimized away if it has no real predecessors. This fixes
191 the problem with the while examples.
192 Added while_example in Makefile
195 Fooled around with if_while_example: Why does cse make it abort?
196 Cse removes path to End node, Bad remains as pred of Endblock.
197 The block walker can't deal with this.
198 Made new example with only loop: while_example.
201 added auto documentation in Makefiles, configure, etc
202 example in ir/ir/ircons.c - much must be added
203 creation of documentation by 'make autodoc' in architecture directory
206 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
207 replaced some C++ style comments (//) by standard C comments /**/
210 - configure (with some features, see --help for more)
211 - make [depend | tags | install]
212 - make [run] in testprograms
214 - compilation on SunOS
216 - automatic call of autoconf if required
219 More colours in vcg output.
220 Fixed bug: cse found that start block equals it's
221 first successor as both have the Start block as predecessor.
222 This only happens for local_optimize_graph() as during construction
223 the Start block is not entered in the value table.
224 Changed implementation: irgmod: local_optimize_graph() did not
225 empty the hash table with the irnodes for cse. This might cause that
226 cse turns up with a node that seems better but was removed from the
227 graph in an earlier optimization phase.
228 Removed old #if 1 from ircons.c
229 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
230 Optimizes blocks that had bad predecessors.
235 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
236 Added a module deb_info in debug.h. Adapted makefile. Added example
238 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
240 Removed inabled code for dead node elimination in irgopt.h.
241 Renamed some missnamed access routines (_of_). Macros with old names
242 are in old_fctnames.h.
243 Edited makefiles to remove #* and *.flc.
246 Some minor bugfixes...
249 After compacting of in arrays in dead_node_elimination
250 merge blocks and remove Phis with one pred.
253 Freeing of obstack in dead_node_elimination commented in.
254 Compacting in arrays of Block and Phi nodes in dead_node_
259 added set/get_SymConst_type_or_id in irnode.h
260 added field offset to entity in entity.h
261 added field size to type_class in type.h
262 include "gmp.h" in tv.h with "" instead <>
265 Some changes to make the lib better portable
268 Initialize max_node_nr in irprog.
271 Now outputs warning if faulty type in irdump, dump_type_info.
272 Explicit string termination in irdump, vcg_open.
275 Added external to declaration of irp.
276 Added typedef before pns and pnc_number.
277 irmode.c, init_mode(): We need to memset all new modes as
278 tarval_vrfy reads fields before they are initialized: It
279 compares to min/max when tarvals for min/max are allocated!
282 Changed parameter of Methods in type.h and type.c from
283 class to clss. Class is a C++ keyword.
286 Changed some testprograms to accomodate Uebprakt.
289 Finished implementation of dump_all_types.
290 Added new testprogram inheritance_example.
293 Added seven access routines in type.[hc]:
294 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
295 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
296 Fixed the type_walk_2 for those seven routines.
299 Added irdump routine dump_all_types.
300 Did changes to irprog, type, typewalk to achieve this.
301 typewalk needs to walk along members, sub and supertypes, this
302 is still missing! irdump then needs to output these edges.
304 ======================================================================
305 ==================== New version: 0.2.5 ==============================
306 ======================================================================
309 Made new Version: 0.2.5
311 15.8.2000 Goetz until 3.9.00
312 Separated irnode.h and many others into two files: one public
314 Added funcionality to extract headers for lib.
317 type_dump also dumps irg->ent
318 if_example: corrected nr of locals
321 irgopt: Correct copy of self pointer in start block.
322 irgopt: Correct treatment of loops: pre function in walker
323 breaks all possible loops in Phi and Block nodes.
324 irr_loop_example: wrong Return statement
325 Now I fixed all but one error: in memory_example.
326 This error showed a conceptual problem, so I wrote
327 a slightly different algorithm. This now runs for
329 dead_node_example: cse is buggy!! merges start and the
333 looking at bug in dead_node_elimination.
335 irnode: all get_..._arr functions changed
336 ircons: new_r_Block: set matured flag.
337 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
338 adapted call_str_example to new concepts.
341 Implemented simpler Phi construction algorithm that constructs
342 correct code for three_cfpred_example in ircons. This algorithm
343 generates more Id nodes than the original algorithm and therefore
345 Also made some changes to optimizations of Not.
348 Fixed a bug, caused by the recursive use in type.h and entity.h.
349 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
350 Fixed a problem in if_while testprogram, so it now works.
353 Fixed bug in optimize(). Returned Null instead n if
354 get_optimize() == false.
357 Added some access routines in type.[hc]. Solved a recursive definition
358 of type_class struct, entity struct and type union.
361 Separated entity header into pure functional header and header
365 ... a bunch small changes not documented
368 Changed output of oo_prog_example: now uses the internal list
369 of all irgs. Had to implement some of the access routines for
370 that. Also fixed a bug in irdump. Main routines did not use
371 current_ir_graph properly.
374 Implemented some missing parts in irgopt.
375 Added field irg to entity. Only valid if entity is a method.
376 Had to resove a cyclic de[endency between irgraph.h and entity.h
378 Added fields sub and super to type_class for inheritance.
379 Added field main_irg to irprog.
382 Fixed some bugs in irgopt.c
383 Added some missing 'get_new_node' methods, so the new obstack contains
387 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
388 Solved some copy'n'paste problems. Deleted most debug-code!
389 Added comments to several files.
392 Fixed bug in _r_ constructors for all four Div operations.
393 Fixed bug in turn_into_tuple: didn't remember the block.
394 Tested transform_node.
397 Fixed some testprograms to new semantics of firm.
398 Added testprogram global_var_example.
399 Fixed a bug in irop: Size of Sel node was (entity *) instead of
400 sel_attr. Therefor array_heap_example aborted.
401 Also found a missing break in typewalk, case iro_Alloc.
402 Added a construct that unifies all things constructed by the lib
403 and needed to represent a program: irprog.ch
404 This contains a list of all types as well as a list of all ir graphs.
405 I added calls to initialization and constructors so that this is constructed
406 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
407 Removed strange block struct and constructor from ircons.c.
408 Moved routines for automatic Phi construction from irgmod to ircons.
409 Sorted functions in ircons to reflect the different interfaces.
410 Renamed dataseg to globals to be conformant with documentation.
411 Added conservation of current_ir_graph to irgopt.c.
412 Corrected bug in Makefiles: wrong path to directory ./inlude.
415 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
416 We should change the naming of the Block constructor.
417 Removed acces routines to attr. "closed" of Block.
418 Removed second implementation of new_ir_node from ircons and some comments
419 concerned with the now resolved cyclic dependency.
420 Fixed some bugs in irgopt so that the compilation goes through.
423 Changed the irnode attribut 'visit' into 'visited'.
424 Added some access functions, like get/set_irn_visit etc.
427 Renamed some access funtion in irgraph.*.
428 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
429 Added two attributes to the irgraph struct. The visited flags belongs
430 to a ir graph, not to a whole program.
433 A new optimization has been finished. The dead-node-elimination copies
434 the existing ir graph from one opstack to another. While walking the
435 graph, only the reachable nodes will be copied, so the "dead-nodes"
436 (unreachable in the controlflow) are removed.
439 Solved some problems in the 'copy_node' function. The in array was not
440 as easy as it seamed.
443 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
444 optimization, which is needed in the paramter list of 'irg_walk'.
447 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
448 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
452 Removed some files from the archive, after dependencies and usage are
454 - 'ir/common/strerror.c'
456 - 'ir/ident/xx_ident.h'
457 an empty file, only included by 'ident.c', but never used;
458 - 'ir/tv/label.c' and
460 contained a numeric counter;
461 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
462 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
463 In the old fiasco compiler, the label thing is used in the backend.
464 Search for 'babil' to see the usage.
465 Also removed the two attributes 'lab' and 'used' in the tarval struct.
468 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
469 afterwards some recursive includes, so libfirm works again.
472 Did a lot of changes, which I never commented until now (4.7.00).
474 * Added new result to Start node: Pointer to global data segment.
475 * Extended Semantics of SymConst node to represent information for the
477 * Added arithmeitc nodes (Shrs, Minus ...)
479 Rearranged the directory structure and adjusted the makefiles.
480 The directories contain:
481 ir: everything for the intermediate representation (better: src?)
482 /ir: the ir itself, and standard optimizations.
483 /tv: the target value module
484 /tr: the type and entity representation
485 /adt: abstract data types
486 /common: stuff needed by all other dirs
487 /debug: debugging Unterstuetzung
489 include: external files needen as includes
490 testprograms: examples to test the lib.
492 The makefiles generate files with extension .d that contain the dependencies
496 Added access routine to attribute link of irnode in irnode.ch.
497 Added get_negated_pnc to irnode.ch.
500 Added an iterator in iropt that calls the optimization for all nodes.
501 Copied optimize's code to optimize_in_place and removed deallocations.
502 Made set_irn_n in irnode.c public.
503 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
504 are allowded as cfgpredecessors to represent dead "incoming" control
506 Added call to optimize_in_place in mature_block. Is this useful?
509 Changed tests from comparing enums to comparing pointers. This is more
510 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
511 now get_irn_op == op_And
514 Compared equivalent_value to the one in the original fiasco.
515 Added a test in case iro_And.
516 Changed implementation of iro_Div. Added routines turn_into_tuple
517 and set_irn_op() in irgmod/irnode.
518 Changed implementation of irn_Minus (although commented out).
519 Now all features are ported or documented for this function.
522 Compared computed_value to the one in the original fiasco.
523 Added one further optimization in case iro_Proj.
524 Now all features are ported for this function.
527 Updated comments in ircons.h.
530 Changed possible attribute of SymConst from type_class to type.
531 SymConst size could be the size of a union, array, ...
534 Implemented two dumpers that dump type information and a graph with
538 Implemented a walker that walks over the type informatin that can
539 be reached from an ir node.
540 Added routine get_kind(firm_thing) in common.h, Added file common.c.
541 Added files typewalk.ch and routines to irdump.
542 Added visited flags and initialization to entity and all types.
543 Implemented some of the missing access routines in type.c, entity.c
546 Implemented constructor for ShrA.
548 Added routine that iterates the graph and verifies all nodes.
549 Added Phi_in stack to irgraph. This allows to build several
550 graphs at once with respect to the Phi building algorithm.
553 Implemented dumper for control flow graphs. Changed irr_* and dead_*
554 examples to dump cfg.
557 Implemeted explicit stack for the Phi node generation. See ircons.c.
560 added include string.h in xoprintf.c to get rid of warning:
561 implicit declaration of function `bcopy'
565 Added more cases to equivalent_node.
566 Portet gigo, identify, identify_remember.
567 The set/pset library can not handle several hash tables. At least,
568 compiling several procedures causes a segmentation fault during access
569 to the tables (oo_program_example). Need to work on this.
570 transform_node still needs to be ported.
571 some cases in equivalent_node are still missing.
573 To get it running I had to remove the call to optimize in the
574 new_Block constructor. It can only be called when the Block is
578 Introduced a walker that walks only over blocks. The asserts
579 might be too strict for general graphs, but so far it works.
580 For the walker I introduced an additional flag in the attribute
581 of Blocks, an a global block_visited variable (in irgraph.h).
582 Furhter I modularized dump_ir_node, implemented dump_ir_graph
583 with the existing walker, and added new routines to output a
585 Changed the examples to call the new dump routine.
588 Added auxiliary routines to ir_node:
589 skip_Proj, skip_Nop, is_Bad ...
590 Changed access routines to use get_irn_n instead of explicit array
591 accesses. Changed get_irn_n to call skip_Id, so that the access routines
592 never will return Id nodes.
595 Repaired Phi computation, changed new_r_Phi_in. Added test program to
596 test irregular controlflow.
599 Updated optimizations computed_value and equivalent_node to new
600 Syntax of FIRM nodes and to use access routines.
601 Added routine skip_Proj in irnode.
603 2.2.2000 Boris Boesler
604 Added files irgwalk.c and irgwalk.h. They include a simple function to
605 traverse an ir graph and execute pre and post functions to current node.
608 Added arrays with parameters and result types to the type informtion
609 of a procedure. This is needed for the code generation. Also added
610 the corresponding access routines.
611 Adapted the testprograms.
614 Found a bug / complication: the call order
615 get_value (makes Phi0, put's it into graph_arr)
616 set_value (overwrites Phi0 in graph_arr)
617 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
619 fails. Added test wether graph_arr is already set in phi_merge.
621 Added tons of comments to explain Phi generation -- the stack hack.
625 irdump now outputs the pnc_number for projs of Cmp nodes.
626 Added routine to access the pnc_string.
629 Added result "dataseg" to Start node, with all it's consequences.
630 We need this for the compiler lab to translate global variables.
631 Now they can be selected from the data segment, and the start
632 node supplies the pointer to this segment.
633 These changes are guarded by preprocessor variable UEBPRAKT in
635 Changed files: common.h, irgraph.ch, irnode.h
639 removed array_example, added array-heap_example and
640 array-stack_example and adapted makefile.
642 Entity now also allows type_method as owner. This is to model
643 the stack, Sel nodes that select a variable (array) from the
644 stack need an entity that describes what they select. This
645 entity gets the type of the enclosing procedure as owner.
648 Added future access routines in `irmode.[ch]' as comments,
649 that all attributes in the ir_mode struct can be user-defined.
650 Added access routines in `irgraph.[ch]', for all attributes.
653 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
654 Added `irvrfy.[ch]' to MAKEFILE
655 Added "inline" before access routines in `irnode.h', that no warnings
656 will appear furthermore.
657 Added three more access routines in `irmode.[ch]':
658 struct tarval *get_min_of_mode (ir_mode *mode);
659 struct tarval *get_max_of_mode (ir_mode *mode);
660 struct tarval *get_null_of_mode (ir_mode *mode);
663 Adaption of Alloc, Sel and Entity to new types:
664 Changed array_example to use type instead of type_class.
665 Changed entity to allow all types as owner instead of
666 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
667 Changed alloc to allow allocating variables of any type instead of
669 Adapted all testprograms to avoid warnings.
671 removed dtest ... from Makefile, replaced by test.
674 Added "run" to makefile, added array_example to makefile of testprograms.
675 Corrected testprogram array
676 Changed assert in irvrfy -- Conv.
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