2 Added several constructors to tv.
3 Changed xgprintf so that full precision of double tvs is printed.
7 Added debug support, renamed stuff in ir/debug.
8 Optimizations still loose debug information.
11 Added flag "peculiarity" to entity.h, type.h.
14 Bug: dominator construction aborts for BreakTest with flag 3.31
15 Problem: optimization of many subsequent blocks (Jmp-chains)
16 where one is inlined (Tuple control flow) in a loop. Not all
17 nodes in merged blocks are moved to remaining block.
18 Fix: different calling order to optimize_in_place_2 from
19 optimize_in_place_wrapper.
20 Bug: dumping cfg when a block is Bad. Fix: Output Bad node.
21 Change: not only turn off cse but all optimizations during
25 Parted common.h into two files common_t.h. By this config.h
26 as well as the preprocessor flags are no more visible externaly.
27 Adapted include directives.
30 Bugfix in inlining: problems in combination with cse.
33 Implemented cf optimizations.
34 Checked compiler flags -- sorted better to fit optimizations.
38 Implemented code placement.
42 irdom implemented: dominator information.
45 Bugfix Optmierung Binops mit mode Tupel.
48 irgopt: inline_small_irgs implemented
51 Bugfixes, some access functions ...
54 New directory: ana for analyses. Adapted configure/makefiles
55 implemented irout: backedges. Added one field to ir_graph, one to ir_node.
56 Implemented state management for irgraphs: see irgraph.h.
57 Must now call finalize_cons() after graph construction!!
61 Flag pinned in irop, irgraph.
62 Global cse in irop, setting the irgraph flag.
63 Example programs: Endless_loop.c. global_cse.c.
67 Implemented support for endless loops:
69 Adapted Phi constructors so that memory phis are added.
70 Adapted Cond optimization: add block to End.
71 Adapted dead node elimination: compation of Ends predecessors
72 Adapted inlineing: remember keepalives of inlined graph.
73 Added informative strings to asserts in irvrfy.
76 Added volatile flag to entity, order flag to array.
77 Added a set of assertions.
80 Added access function set_class_members()
83 Asserts in irvrfy that verify the mode of Proj nodes. For Start,
84 Call, Return they check the corresponding function type! Corrected
86 Some asserts for legal values of 'pos' arguments in type/entity
90 Some access routines for visited flags in entity.h, irnode.h,
91 bug in oo_program_example.
94 Removed all obsolete Makefiles
97 Added support for constant entities. A new example program illustrates
98 their use. Extended dumper routines to dump constant values.
101 Extendend "comfortable" construction interface by some methods
102 serving as simple shortcuts.
105 Added a class type to irgs. This class type is to be used as owner
106 for local entities of the procedure. This are all entities allocated
107 for each execution of the procedure.
108 The class type is allocated automatically by new_ir_graph(). Access
109 routines to get this type are in irgraph.h.
110 We chose a class type as this allows to represent "inner" procedures
112 Adapted array-stack-example.
115 irdump outputs nodeids instead of pointers for labels of nodes.
116 With a preprocessor flag in common.h this can be turned off.
119 Added an Id tag to every .c and .h file
122 Changed SSA constuction for exception control flow.
123 If PRECISE_EXC_CONTEXT is used Phi nodes will use the values
124 valid when the execption operation was allocated. This increases
125 the memory consuption of the construction algorithm by
126 n_loc * #fragile_ops.
129 Added method to replace in array of a node in irnode.c/h
130 Added functionality to irgmod:
131 * collect all Phi nodes as link-list in the Blocks link field
132 * collect all Proj nodes as link-list in node producing the tuple.
133 * Seperate a Block into two
134 Added inlining transformation in irgopt.h
135 Improved output of dump_ir_block_graph. Now also dumps nodes that
136 don't belong to a block.
137 Added flag opt_unreachable_code, opt_inline.
138 Changed irvrfy so that it accepts nodes with Bad predecessors.
141 renamed get_type_nameid to get_type_ident
144 Bugfix: dead node elimination did not replace the hash table
148 Added routine remove_irp_irg.
149 Changed comment to free_ir_graph.
152 Added routine to free irgraphs.
155 Improved add routines to sub, supertype in type.c
158 Added implementation of overwrites stuff.
161 Implemented stuff to change the type graph. See
162 typegmod.h and tpop.h for basic documentation of the change.
163 There now exists a type of kind type_id. If this appears
164 externally this is a bug.
167 Added some new access routines to types.
168 List of overwritten fields for entities.
169 Removed a bug in irnode.
172 Added a routine to set the mangled entity name.
173 Added two routines to copy entites.
176 Entities now have two more flags, for visibility and allocation mode.
177 Types that have a layout have a flag indicating whether the layout is
181 We distinguish three kinds of Cond nodes. These can be distinguished
182 by the mode of the selector operand and an internal flag of type cond_kind.
183 First we distinguish binary Conds and switch Conds.
184 A binary Cond has as selector a boolean value. Proj(0) projects the control
185 flow for case "False", Proj(1) the control flow for "True". A binary Cond
186 is recognized by the boolean selector.
187 The switch Cond has as selector an unsigned integer. It produces as result
188 an n+1 Tuple (cf0, ... , cfn) of control flows.
189 We differ two flavours of this Cond. The first, the dense Cond, passes
190 control along output i if the selector value is i, 0 <= i <= n. If the
191 selector value is >n it passes control along output n.
192 The second Cond flavor differes in the treatment of cases not specified in
193 the source program. It magically knows about the existence of Proj nodes.
194 It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
195 exists. Else it passes control along output n (even if this Proj does not
196 exist.) This Cond we call "fragmentary". There is a special constructor
197 new_defaultProj that automatically sets the flavor.
198 The two switch flavors are distinguished by a flag of type cond_kind.
199 Default flavor is "dense"
203 tv now implements Minus, Abs.
204 iropt now optimizes these and Div, Mod, Quot, DivMod.
205 Still missing: Shrs, Rot.
206 tarval_shr somtimes performs shrs, depending on the compiler/system!!
207 If the ArmRoq implementation is faulty there might appear errors.
210 Changed ircons: If undefined values are used the Phi construction
211 inserts a constant with value tarval_bad.
214 Changed array bounds in type.h to ir_node*. This allows to
215 construct array bounds that are complex constant expressions
216 simpler. Further dynamic array bounds can be displayed.
217 Comment in ircons.c extended: undefined values in start_block.
220 ifdef'ed all uses of gmp in tv.c away. Optimizations for
221 mode_Z no more supported, as well as constants of that mode.
224 Dokumentation in ir_dump
225 Habe Routinen fuer einzelne Knoten/Kanten aus header entfernt:
226 Benutzen globale Variable die nicht oeffentlich zugaenglich ist.
229 We need an entity for the array elements for the Sel nodes. This
230 entity should be stored in the array type. Changed constructor
231 parameters: include array element type. Entity for elements is built
236 Faulty use of va_arg, became visible with new, stricter gcc 2.96.
239 Added list of member entites to union. unioned_types and delimiters
240 are superfluous now -- removed.
241 Rationale: we want to express selection of a union member as a Sel
242 node. for this we need to have entities. The entities contain the
243 unioned type and have as name the delimiters...
246 Changed Makefile/MakeTargets to install headers and libraries
250 Changed Makefile and Configure scripts to produce a proper tar file
251 for distribution (libfirm-VERSION.tar)
252 Use 'make distrib' instead of 'make dist'
255 Changed implementation of tr module. With this I also changed the
256 interface!! Type casts are unnecessary now, but some access funcions
260 ======================================================================
261 ==================== New version: 0.3.0 ==============================
262 ======================================================================
268 added creation of a tar archive for distribution
269 replaced ir/.dummy.in by ir/Makefile.in
272 Changed equivalent_node() and copy_preds() so that the end block
273 is not optimized away if it has no real predecessors. This fixes
274 the problem with the while examples.
275 Added while_example in Makefile
278 Fooled around with if_while_example: Why does cse make it abort?
279 Cse removes path to End node, Bad remains as pred of Endblock.
280 The block walker can't deal with this.
281 Made new example with only loop: while_example.
284 added auto documentation in Makefiles, configure, etc
285 example in ir/ir/ircons.c - much must be added
286 creation of documentation by 'make autodoc' in architecture directory
289 added lots of #ifdef HAVE_CONFIG_G #include "config.h" #endif
290 replaced some C++ style comments (//) by standard C comments /**/
293 - configure (with some features, see --help for more)
294 - make [depend | tags | install]
295 - make [run] in testprograms
297 - compilation on SunOS
299 - automatic call of autoconf if required
302 More colours in vcg output.
303 Fixed bug: cse found that start block equals it's
304 first successor as both have the Start block as predecessor.
305 This only happens for local_optimize_graph() as during construction
306 the Start block is not entered in the value table.
307 Changed implementation: irgmod: local_optimize_graph() did not
308 empty the hash table with the irnodes for cse. This might cause that
309 cse turns up with a node that seems better but was removed from the
310 graph in an earlier optimization phase.
311 Removed old #if 1 from ircons.c
312 Commented in call of optimization for Block nodes in irgopt.c, copy_preds():
313 Optimizes blocks that had bad predecessors.
318 Moved struct from irprog.h to irprog_t.h, same for irmode.h.
319 Added a module deb_info in debug.h. Adapted makefile. Added example
321 Removed use of debug.h in ident.c. Now debug.c|h can be moved to
323 Removed inabled code for dead node elimination in irgopt.h.
324 Renamed some missnamed access routines (_of_). Macros with old names
325 are in old_fctnames.h.
326 Edited makefiles to remove #* and *.flc.
329 Some minor bugfixes...
332 After compacting of in arrays in dead_node_elimination
333 merge blocks and remove Phis with one pred.
336 Freeing of obstack in dead_node_elimination commented in.
337 Compacting in arrays of Block and Phi nodes in dead_node_
342 added set/get_SymConst_type_or_id in irnode.h
343 added field offset to entity in entity.h
344 added field size to type_class in type.h
345 include "gmp.h" in tv.h with "" instead <>
348 Some changes to make the lib better portable
351 Initialize max_node_nr in irprog.
354 Now outputs warning if faulty type in irdump, dump_type_info.
355 Explicit string termination in irdump, vcg_open.
358 Added external to declaration of irp.
359 Added typedef before pns and pnc_number.
360 irmode.c, init_mode(): We need to memset all new modes as
361 tarval_vrfy reads fields before they are initialized: It
362 compares to min/max when tarvals for min/max are allocated!
365 Changed parameter of Methods in type.h and type.c from
366 class to clss. Class is a C++ keyword.
369 Changed some testprograms to accomodate Uebprakt.
372 Finished implementation of dump_all_types.
373 Added new testprogram inheritance_example.
376 Added seven access routines in type.[hc]:
377 get_class_n_member, get_class_n_subtype, get_class_n_supertype,
378 get_strct_n_member, add_strct_member, get_strct_member and set_strct_member.
379 Fixed the type_walk_2 for those seven routines.
382 Added irdump routine dump_all_types.
383 Did changes to irprog, type, typewalk to achieve this.
384 typewalk needs to walk along members, sub and supertypes, this
385 is still missing! irdump then needs to output these edges.
387 ======================================================================
388 ==================== New version: 0.2.5 ==============================
389 ======================================================================
392 Made new Version: 0.2.5
394 15.8.2000 Goetz until 3.9.00
395 Separated irnode.h and many others into two files: one public
397 Added funcionality to extract headers for lib.
400 type_dump also dumps irg->ent
401 if_example: corrected nr of locals
404 irgopt: Correct copy of self pointer in start block.
405 irgopt: Correct treatment of loops: pre function in walker
406 breaks all possible loops in Phi and Block nodes.
407 irr_loop_example: wrong Return statement
408 Now I fixed all but one error: in memory_example.
409 This error showed a conceptual problem, so I wrote
410 a slightly different algorithm. This now runs for
412 dead_node_example: cse is buggy!! merges start and the
416 looking at bug in dead_node_elimination.
418 irnode: all get_..._arr functions changed
419 ircons: new_r_Block: set matured flag.
420 ircons: new_r_SymConst: needs mode_p for linkage_ptr_info.
421 adapted call_str_example to new concepts.
424 Implemented simpler Phi construction algorithm that constructs
425 correct code for three_cfpred_example in ircons. This algorithm
426 generates more Id nodes than the original algorithm and therefore
428 Also made some changes to optimizations of Not.
431 Fixed a bug, caused by the recursive use in type.h and entity.h.
432 Deleted the _TYPE_TYPEDEF_ and inserted the _ENTITY_TYPEDEF_ instead.
433 Fixed a problem in if_while testprogram, so it now works.
436 Fixed bug in optimize(). Returned Null instead n if
437 get_optimize() == false.
440 Added some access routines in type.[hc]. Solved a recursive definition
441 of type_class struct, entity struct and type union.
444 Separated entity header into pure functional header and header
448 ... a bunch small changes not documented
451 Changed output of oo_prog_example: now uses the internal list
452 of all irgs. Had to implement some of the access routines for
453 that. Also fixed a bug in irdump. Main routines did not use
454 current_ir_graph properly.
457 Implemented some missing parts in irgopt.
458 Added field irg to entity. Only valid if entity is a method.
459 Had to resove a cyclic de[endency between irgraph.h and entity.h
461 Added fields sub and super to type_class for inheritance.
462 Added field main_irg to irprog.
465 Fixed some bugs in irgopt.c
466 Added some missing 'get_new_node' methods, so the new obstack contains
470 Renamed ir_vrfy to irn_vrfy and vrfy_graphg to irg_vrfy.
471 Solved some copy'n'paste problems. Deleted most debug-code!
472 Added comments to several files.
475 Fixed bug in _r_ constructors for all four Div operations.
476 Fixed bug in turn_into_tuple: didn't remember the block.
477 Tested transform_node.
480 Fixed some testprograms to new semantics of firm.
481 Added testprogram global_var_example.
482 Fixed a bug in irop: Size of Sel node was (entity *) instead of
483 sel_attr. Therefor array_heap_example aborted.
484 Also found a missing break in typewalk, case iro_Alloc.
485 Added a construct that unifies all things constructed by the lib
486 and needed to represent a program: irprog.ch
487 This contains a list of all types as well as a list of all ir graphs.
488 I added calls to initialization and constructors so that this is constructed
489 automatically. I changed firm.c, type.c, irgraph.c and ev. more.
490 Removed strange block struct and constructor from ircons.c.
491 Moved routines for automatic Phi construction from irgmod to ircons.
492 Sorted functions in ircons to reflect the different interfaces.
493 Renamed dataseg to globals to be conformant with documentation.
494 Added conservation of current_ir_graph to irgopt.c.
495 Corrected bug in Makefiles: wrong path to directory ./inlude.
498 Commented a whole bunch of stuff, e.g. in ircons.h (Procedure to construct)
499 We should change the naming of the Block constructor.
500 Removed acces routines to attr. "closed" of Block.
501 Removed second implementation of new_ir_node from ircons and some comments
502 concerned with the now resolved cyclic dependency.
503 Fixed some bugs in irgopt so that the compilation goes through.
506 Changed the irnode attribut 'visit' into 'visited'.
507 Added some access functions, like get/set_irn_visit etc.
510 Renamed some access funtion in irgraph.*.
511 Deleted two global flags (ir_visited and block_visited) from irgraph.*.
512 Added two attributes to the irgraph struct. The visited flags belongs
513 to a ir graph, not to a whole program.
516 A new optimization has been finished. The dead-node-elimination copies
517 the existing ir graph from one opstack to another. While walking the
518 graph, only the reachable nodes will be copied, so the "dead-nodes"
519 (unreachable in the controlflow) are removed.
522 Solved some problems in the 'copy_node' function. The in array was not
523 as easy as it seamed.
526 Wrote a new 'post' funtion, for future use in 'dead-node-elimination'
527 optimization, which is needed in the paramter list of 'irg_walk'.
530 Moved 'optimze_in_place_wrapper' from iropt.* tothe new files irgopt.*.
531 New functions 'local_optimze_graph' and 'dead_node_elimination' are added,
535 Removed some files from the archive, after dependencies and usage are
537 - 'ir/common/strerror.c'
539 - 'ir/ident/xx_ident.h'
540 an empty file, only included by 'ident.c', but never used;
541 - 'ir/tv/label.c' and
543 contained a numeric counter;
544 The files were included in 'tv.h' and implemented in 'tarval.c'. The two
545 functions 'tarval_label' and 'tarval_forall_labeled' were also never used.
546 In the old fiasco compiler, the label thing is used in the backend.
547 Search for 'babil' to see the usage.
548 Also removed the two attributes 'lab' and 'used' in the tarval struct.
551 Moved the 'new_ir_node' constructor from ircons.* to irnode.* and fixed
552 afterwards some recursive includes, so libfirm works again.
555 Did a lot of changes, which I never commented until now (4.7.00).
557 * Added new result to Start node: Pointer to global data segment.
558 * Extended Semantics of SymConst node to represent information for the
560 * Added arithmeitc nodes (Shrs, Minus ...)
562 Rearranged the directory structure and adjusted the makefiles.
563 The directories contain:
564 ir: everything for the intermediate representation (better: src?)
565 /ir: the ir itself, and standard optimizations.
566 /tv: the target value module
567 /tr: the type and entity representation
568 /adt: abstract data types
569 /common: stuff needed by all other dirs
570 /debug: debugging Unterstuetzung
572 include: external files needen as includes
573 testprograms: examples to test the lib.
575 The makefiles generate files with extension .d that contain the dependencies
579 Added access routine to attribute link of irnode in irnode.ch.
580 Added get_negated_pnc to irnode.ch.
583 Added an iterator in iropt that calls the optimization for all nodes.
584 Copied optimize's code to optimize_in_place and removed deallocations.
585 Made set_irn_n in irnode.c public.
586 Added Bad as possible cfg predecessor in is_cfg_node in irnode. Bads
587 are allowded as cfgpredecessors to represent dead "incoming" control
589 Added call to optimize_in_place in mature_block. Is this useful?
592 Changed tests from comparing enums to comparing pointers. This is more
593 efficient (is it?) and reads better. e.g., instead get_irn_opcode == irm_And
594 now get_irn_op == op_And
597 Compared equivalent_value to the one in the original fiasco.
598 Added a test in case iro_And.
599 Changed implementation of iro_Div. Added routines turn_into_tuple
600 and set_irn_op() in irgmod/irnode.
601 Changed implementation of irn_Minus (although commented out).
602 Now all features are ported or documented for this function.
605 Compared computed_value to the one in the original fiasco.
606 Added one further optimization in case iro_Proj.
607 Now all features are ported for this function.
610 Updated comments in ircons.h.
613 Changed possible attribute of SymConst from type_class to type.
614 SymConst size could be the size of a union, array, ...
617 Implemented two dumpers that dump type information and a graph with
621 Implemented a walker that walks over the type informatin that can
622 be reached from an ir node.
623 Added routine get_kind(firm_thing) in common.h, Added file common.c.
624 Added files typewalk.ch and routines to irdump.
625 Added visited flags and initialization to entity and all types.
626 Implemented some of the missing access routines in type.c, entity.c
629 Implemented constructor for ShrA.
631 Added routine that iterates the graph and verifies all nodes.
632 Added Phi_in stack to irgraph. This allows to build several
633 graphs at once with respect to the Phi building algorithm.
636 Implemented dumper for control flow graphs. Changed irr_* and dead_*
637 examples to dump cfg.
640 Implemeted explicit stack for the Phi node generation. See ircons.c.
643 added include string.h in xoprintf.c to get rid of warning:
644 implicit declaration of function `bcopy'
648 Added more cases to equivalent_node.
649 Portet gigo, identify, identify_remember.
650 The set/pset library can not handle several hash tables. At least,
651 compiling several procedures causes a segmentation fault during access
652 to the tables (oo_program_example). Need to work on this.
653 transform_node still needs to be ported.
654 some cases in equivalent_node are still missing.
656 To get it running I had to remove the call to optimize in the
657 new_Block constructor. It can only be called when the Block is
661 Introduced a walker that walks only over blocks. The asserts
662 might be too strict for general graphs, but so far it works.
663 For the walker I introduced an additional flag in the attribute
664 of Blocks, an a global block_visited variable (in irgraph.h).
665 Furhter I modularized dump_ir_node, implemented dump_ir_graph
666 with the existing walker, and added new routines to output a
668 Changed the examples to call the new dump routine.
671 Added auxiliary routines to ir_node:
672 skip_Proj, skip_Nop, is_Bad ...
673 Changed access routines to use get_irn_n instead of explicit array
674 accesses. Changed get_irn_n to call skip_Id, so that the access routines
675 never will return Id nodes.
678 Repaired Phi computation, changed new_r_Phi_in. Added test program to
679 test irregular controlflow.
682 Updated optimizations computed_value and equivalent_node to new
683 Syntax of FIRM nodes and to use access routines.
684 Added routine skip_Proj in irnode.
686 2.2.2000 Boris Boesler
687 Added files irgwalk.c and irgwalk.h. They include a simple function to
688 traverse an ir graph and execute pre and post functions to current node.
691 Added arrays with parameters and result types to the type informtion
692 of a procedure. This is needed for the code generation. Also added
693 the corresponding access routines.
694 Adapted the testprograms.
697 Found a bug / complication: the call order
698 get_value (makes Phi0, put's it into graph_arr)
699 set_value (overwrites Phi0 in graph_arr)
700 mature_block (upgrades Phi0, puts it again into graph_arr, overwriting
702 fails. Added test wether graph_arr is already set in phi_merge.
704 Added tons of comments to explain Phi generation -- the stack hack.
708 irdump now outputs the pnc_number for projs of Cmp nodes.
709 Added routine to access the pnc_string.
712 Added result "dataseg" to Start node, with all it's consequences.
713 We need this for the compiler lab to translate global variables.
714 Now they can be selected from the data segment, and the start
715 node supplies the pointer to this segment.
716 These changes are guarded by preprocessor variable UEBPRAKT in
718 Changed files: common.h, irgraph.ch, irnode.h
722 removed array_example, added array-heap_example and
723 array-stack_example and adapted makefile.
725 Entity now also allows type_method as owner. This is to model
726 the stack, Sel nodes that select a variable (array) from the
727 stack need an entity that describes what they select. This
728 entity gets the type of the enclosing procedure as owner.
731 Added future access routines in `irmode.[ch]' as comments,
732 that all attributes in the ir_mode struct can be user-defined.
733 Added access routines in `irgraph.[ch]', for all attributes.
736 Moved verify routines from `irgraph.[ch]' to own files `irvrfy.[ch]'.
737 Added `irvrfy.[ch]' to MAKEFILE
738 Added "inline" before access routines in `irnode.h', that no warnings
739 will appear furthermore.
740 Added three more access routines in `irmode.[ch]':
741 struct tarval *get_min_of_mode (ir_mode *mode);
742 struct tarval *get_max_of_mode (ir_mode *mode);
743 struct tarval *get_null_of_mode (ir_mode *mode);
746 Adaption of Alloc, Sel and Entity to new types:
747 Changed array_example to use type instead of type_class.
748 Changed entity to allow all types as owner instead of
749 only type_class. Added routine "assert_legal_owner_of_ent(type* type)".
750 Changed alloc to allow allocating variables of any type instead of
752 Adapted all testprograms to avoid warnings.
754 removed dtest ... from Makefile, replaced by test.
757 Added "run" to makefile, added array_example to makefile of testprograms.
758 Corrected testprogram array
759 Changed assert in irvrfy -- Conv.
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