X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/760b53a84bfc0c79bac266414136936400769e33..35687a9d8c10446d020975fd40a3acf35b6895f6:/ChangeLog diff --git a/ChangeLog b/ChangeLog index afc46aa4..b9189245 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,251 @@ +2001-12-05 Akim Demaille + + Pessimize the code to simplify it: from now on, all the states + have a valid SHIFTS, which NSHIFTS is possibly 0. + + * src/LR0.c (shifts_new): Be global and move to.. + * src/state.c, src/state.h: here. + * src/conflicts, src/lalr.c, src/output.c, src/print.c, + * src/print_graph: Adjust. + +2001-12-05 Akim Demaille + + * src/state.h (SHIFT_DISABLE, SHIFT_IS_DISABLED): New. + * src/conflicts.c: Use it. + Restore a few missing `if (!SHIFT_IS_DISABLED)' which were + incorrectly ``simplified''. + +2001-12-05 Akim Demaille + + * src/conflicts.c (flush_shift, resolve_sr_conflict): De-obfuscate + using the good o' techniques: arrays not pointers, variable + locality, BITISSET, RESETBIT etc. + +2001-12-05 Akim Demaille + + * src/state.h (SHIFT_SYMBOL): New. + * src/conflicts.c: Use it to deobfuscate. + +2001-12-05 Akim Demaille + + * src/conflicts.c (count_sr_conflicts, count_rr_conflicts) + (print_reductions): De-obfuscate using the good o' techniques: + arrays not pointers, variable locality, BITISSET. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Arrays, not pointers. + Use BITISSET. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Pessimize, but clarify. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Improve variable locality. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Pessimize, but clarify. + +2001-12-05 Akim Demaille + + * src/conflicts.c (print_reductions): Improve variable locality. + +2001-12-05 Akim Demaille + + * src/state.h (SHIFT_IS_ERROR, SHIFT_IS_GOTO, SHIFT_IS_SHIFT): New. + * src/lalr.c: Use them. + +2001-12-05 Akim Demaille + + * src/LR0.c (augment_automaton): Formatting changes. + Better variable locality. + +2001-12-05 Akim Demaille + + * src/lalr.c (matrix_print): New. + (transpose): Use it. + Use arrays instead of pointers. + +2001-12-05 Akim Demaille + + * src/lalr.c (maxrhs): Move to... + * src/gram.c, src/gram.h (ritem_longest_rhs): here. + * src/lalr.c (build_relations): Adjust. + +2001-12-05 Akim Demaille + + * src/lalr.c (transpose): Free the memory allocated to the + argument, as it is replaced by the results by the unique caller. + (build_relations): Merely invoke transpose: it handles the memory + deallocation. + Improve variable locality. + Avoid variables used as mere abbreviations. + (compute_lookaheads): Use arrays instead of pointers. + +2001-12-05 Akim Demaille + + * src/lalr.c (initialize_F): Improve variable locality. + Avoid variables used as mere abbreviations. + +2001-12-05 Akim Demaille + + * src/derives.c (print_derives): Display the ruleno. + * src/lalr.c (initialize_F, transpose): Better variable locality + to improve readability. + Avoid variables used as mere abbreviations. + +2001-12-05 Akim Demaille + + * src/lalr.c (traverse): Use arrays instead of pointers. + +2001-12-05 Akim Demaille + + * src/nullable.c (set_nullable): Use a for loop to de-obfuscate + the handling of squeue. + `symbol >= 0' is wrong now, use `rule_table[ruleno].useful'. + +2001-12-05 Akim Demaille + + Because useless nonterminals are now kept alive (instead of being + `destroyed'), we now sometimes examine them, and store information + related to them. Hence we need to know their number, and adjust + memory allocations. + + * src/reduce.c, src/reduce.h (nuseless_nonterminals): No longer + static. + * src/LR0.c (allocate_itemsets): The memory allocated to + `symbol_count' was used for two different purpose: once to count + the number of occurrences of each symbol, and later reassigned to + `shift_symbol', containing the symbol that can be shifted from a + given state. + Deobfuscate, i.e., allocate, use and free `symbol_count' here + only, and... + (new_itemsets): Allocate `shift_symbol' here. + (allocate_itemsets): symbol_count includes useless nonterminals. + Make room for them. + (free_storage): Use `free', not `XFREE', for pointers that cannot + be null. + +2001-12-05 Akim Demaille + + * src/nullable.c (set_nullable): Deobfuscate the handling of + ritem. + `symbol >= 0' is wrong now, use `rule_table[ruleno].useful'. + +2001-12-05 Akim Demaille + + * src/gram.c, src/gram.h (ritem_print): New. + * src/gram.c (dummy): Remove, now there is actual code in gram.c. + (This useless function was defined only to work around VMS linkers + that can't handle compilation units with variables only). + * src/reduce.c (dump_grammar): Use it to trace the construction of + ritem. + +2001-12-04 Paul Eggert + + * src/bison.simple (union yyalloc): Change member names + to be the same as the stack names. + (yyparse): yyptr is now union yyalloc *, not char *. + (YYSTACK_RELOCATE): Likewise. This avoids a GCC warning, + and may generate better code on some machines. + (yystpcpy): Use prototype if __STDC__ is defined, not just + if __cplusplus is defined. + +2001-11-30 Akim Demaille + + * configure.in (WARNING_CFLAGS): Add -Werror when possible. + (CFLAGS): Do not include the WARNING_CFLAGS here, since GNU + Gettext doesn't compile cleanly, and dies with -Werror. + * src/Makefile.am, lib/Makefile.am, tests/atlocal.in (CFLAGS): + Include WARNING_CFLAGS here. + * lib/xstrdup.c: Include xalloc.h, so that xstrdup be declared + before being defined. + +2001-11-27 Paul Eggert + + * lib/quotearg.h (quotearg_n, quotearg_n_style): + First arg is int, not unsigned. + * lib/quotearg.c (quotearg_n, quotearg_n_style): Likewise. + (SIZE_MAX, UINT_MAX): New macros. + (quotearg_n_options): Abort if N is negative. + Avoid overflow check on hosts where size_t is 64 bits and int + is 32 bits, as overflow is impossible there. + Fix off-by-one typo that caused unnecessary reallocation. + +2001-11-29 Paul Eggert + + Name space cleanup in generated parser. + + * doc/bison.texinfo (Bison Parser): Discuss system headers + and their effect on the user name space. + + * src/bison.simple: + (YYSTACK_ALLOC, YYSTACK_FREE, union yyalloc, YYSTACK_GAP_MAX, + YYSTACK_BYTES, YYSTACK_RELOCATE): Do not define unless necessary, + i.e. unless ! defined (yyoverflow) || defined (YYERROR_VERBOSE). + + (YYSIZE_T): New macro. Use it instead of size_t, to avoid infringing + on user names when possible. + + (YYSTACK_USE_ALLOCA): Do not define; just use any existing defn. + Simplify test for whather exists. + + (): Include if we will use malloc, and if standard C or C++. + + (): Include if YYDEBUG. + + (yymemcpy): Renamed from __yy_memcpy. Do not define unless + ! defined (yyoverflow) && ! defined (yymemcpy). + + (yymemcpy, yyparse): Rename local variables as needed so that + they all begin with 'yy'. + + (yystrlen, yystpcpy): New functions. + + (YY_DECL_NON_LSP_VARIABLES): Renamed from _YY_DECL_VARIABLES. + All uses changed. + + (yyparse): size_t -> YYSIZE_T. Use yystrlen and yystpcpy + instead of relying on string.h functions. Use YYSTACK_ALLOC + and YYSTACK_FREE instead of malloc and free. + +2001-11-30 Akim Demaille + + * src/bison.simple (YYSTYPE, YYLTYPE): Move their definitions + before their first uses. + (YYBISON, YYPURE): Move to the top of the output. + +2001-11-30 Akim Demaille + + * tests/reduce.at (Useless Nonterminals): Fix. + +2001-11-30 Akim Demaille + + * src/bison.simple (YYSTACK_FREE): Use `do {;} while (0)' as empty + if body instead of `;' to pacify GCC's warnings. + +2001-11-30 Akim Demaille + + Instead of mapping the LHS of unused rules to -1, keep the LHS + valid, but flag the rules as invalid. + + * src/gram.h (rule_t): `useful' is a new member. + * src/print.c (print_grammar): Adjust. + * src/derives.c (set_derives): Likewise. + * src/reader.c (packgram, reduce_output): Likewise. + * src/reduce.c (reduce_grammar_tables): Likewise. + * tests/reduce.at (Underivable Rules, Useless Rules): New. + +2001-11-30 Akim Demaille + + * src/reduce.c (reduce_output): Formatting changes. + * src/print.c (print_results, print_grammar): Likewise. + * tests/regression.at (Rule Line Numbers) + (Solved SR Conflicts, Unresolved SR Conflicts): Adjust. + 2001-11-30 Akim Demaille * src/reduce.c (nonterminals_reduce): Instead of throwing away