1 /* params.h - Run-time parameters. 2 Copyright (C) 2001, 2003, 2004, 2005 Free Software Foundation, Inc. 3 Written by Mark Mitchell <mark@codesourcery.com>. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 2, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 20 02110-1301, USA. 21 22 */ 23 24 /* This module provides a means for setting integral parameters 25 dynamically. Instead of encoding magic numbers in various places, 26 use this module to organize all the magic numbers in a single 27 place. The values of the parameters can be set on the 28 command-line, thereby providing a way to control the amount of 29 effort spent on particular optimization passes, or otherwise tune 30 the behavior of the compiler. 31 32 Since their values can be set on the command-line, these parameters 33 should not be used for non-dynamic memory allocation. */ 34 35 #ifndef GCC_PARAMS_H 36 #define GCC_PARAMS_H 37 38 /* No parameter shall have this value. */ 39 40 #define INVALID_PARAM_VAL (-1) 41 42 /* The information associated with each parameter. */ 43 44 typedef struct param_info 45 { 46 /* The name used with the `--param <name>=<value>' switch to set this 47 value. */ 48 const char *const option; 49 /* The associated value. */ 50 int value; 51 52 /* Minimum acceptable value. */ 53 int min_value; 54 55 /* Maximum acceptable value, if greater than minimum */ 56 int max_value; 57 58 /* A short description of the option. */ 59 const char *const help; 60 } param_info; 61 62 /* An array containing the compiler parameters and their current 63 values. */ 64 65 extern param_info *compiler_params; 66 67 /* Add the N PARAMS to the current list of compiler parameters. */ 68 69 extern void add_params (const param_info params[], size_t n); 70 71 /* Set the VALUE associated with the parameter given by NAME. */ 72 73 extern void set_param_value (const char *name, int value); 74 75 76 /* The parameters in use by language-independent code. */ 77 78 typedef enum compiler_param 79 { 80 #define DEFPARAM(enumerator, option, msgid, default, min, max) \ 81 enumerator, 82 #include "params.def" 83 #undef DEFPARAM 84 LAST_PARAM 85 } compiler_param; 86 87 /* The value of the parameter given by ENUM. */ 88 #define PARAM_VALUE(ENUM) \ 89 (compiler_params[(int) ENUM].value) 90 91 /* Macros for the various parameters. */ 92 #define SALIAS_MAX_IMPLICIT_FIELDS \ 93 PARAM_VALUE (PARAM_SALIAS_MAX_IMPLICIT_FIELDS) 94 #define SALIAS_MAX_ARRAY_ELEMENTS \ 95 PARAM_VALUE (PARAM_SALIAS_MAX_ARRAY_ELEMENTS) 96 #define SRA_MAX_STRUCTURE_SIZE \ 97 PARAM_VALUE (PARAM_SRA_MAX_STRUCTURE_SIZE) 98 #define SRA_MAX_STRUCTURE_COUNT \ 99 PARAM_VALUE (PARAM_SRA_MAX_STRUCTURE_COUNT) 100 #define SRA_FIELD_STRUCTURE_RATIO \ 101 PARAM_VALUE (PARAM_SRA_FIELD_STRUCTURE_RATIO) 102 #define MAX_INLINE_INSNS_SINGLE \ 103 PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE) 104 #define MAX_INLINE_INSNS \ 105 PARAM_VALUE (PARAM_MAX_INLINE_INSNS) 106 #define MAX_INLINE_SLOPE \ 107 PARAM_VALUE (PARAM_MAX_INLINE_SLOPE) 108 #define MIN_INLINE_INSNS \ 109 PARAM_VALUE (PARAM_MIN_INLINE_INSNS) 110 #define MAX_INLINE_INSNS_AUTO \ 111 PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO) 112 #define MAX_VARIABLE_EXPANSIONS \ 113 PARAM_VALUE (PARAM_MAX_VARIABLE_EXPANSIONS) 114 #define MAX_DELAY_SLOT_INSN_SEARCH \ 115 PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH) 116 #define MAX_DELAY_SLOT_LIVE_SEARCH \ 117 PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH) 118 #define MAX_PENDING_LIST_LENGTH \ 119 PARAM_VALUE (PARAM_MAX_PENDING_LIST_LENGTH) 120 #define MAX_GCSE_MEMORY \ 121 ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY)) 122 #define MAX_GCSE_PASSES \ 123 PARAM_VALUE (PARAM_MAX_GCSE_PASSES) 124 #define GCSE_AFTER_RELOAD_PARTIAL_FRACTION \ 125 PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_PARTIAL_FRACTION) 126 #define GCSE_AFTER_RELOAD_CRITICAL_FRACTION \ 127 PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_CRITICAL_FRACTION) 128 #define MAX_UNROLLED_INSNS \ 129 PARAM_VALUE (PARAM_MAX_UNROLLED_INSNS) 130 #define MAX_SMS_LOOP_NUMBER \ 131 PARAM_VALUE (PARAM_MAX_SMS_LOOP_NUMBER) 132 #define SMS_MAX_II_FACTOR \ 133 PARAM_VALUE (PARAM_SMS_MAX_II_FACTOR) 134 #define SMS_DFA_HISTORY \ 135 PARAM_VALUE (PARAM_SMS_DFA_HISTORY) 136 #define SMS_LOOP_AVERAGE_COUNT_THRESHOLD \ 137 PARAM_VALUE (PARAM_SMS_LOOP_AVERAGE_COUNT_THRESHOLD) 138 #define GLOBAL_VAR_THRESHOLD \ 139 PARAM_VALUE (PARAM_GLOBAL_VAR_THRESHOLD) 140 #define MAX_ALIASED_VOPS \ 141 PARAM_VALUE (PARAM_MAX_ALIASED_VOPS) 142 #define INTEGER_SHARE_LIMIT \ 143 PARAM_VALUE (PARAM_INTEGER_SHARE_LIMIT) 144 #define MAX_LAST_VALUE_RTL \ 145 PARAM_VALUE (PARAM_MAX_LAST_VALUE_RTL) 146 #define MIN_VIRTUAL_MAPPINGS \ 147 PARAM_VALUE (PARAM_MIN_VIRTUAL_MAPPINGS) 148 #define VIRTUAL_MAPPINGS_TO_SYMS_RATIO \ 149 PARAM_VALUE (PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO) 150 #define MAX_FIELDS_FOR_FIELD_SENSITIVE \ 151 ((size_t) PARAM_VALUE (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE)) 152 #define MAX_SCHED_READY_INSNS \ 153 PARAM_VALUE (PARAM_MAX_SCHED_READY_INSNS) 154 #endif /* ! GCC_PARAMS_H */ 155