1/* params.h - Run-time parameters. 2 Copyright (C) 2001, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 3 Free Software Foundation, Inc. 4 Written by Mark Mitchell <mark@codesourcery.com>. 5 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify it under 9the terms of the GNU General Public License as published by the Free 10Software Foundation; either version 3, or (at your option) any later 11version. 12 13GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14WARRANTY; without even the implied warranty of MERCHANTABILITY or 15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16for more details. 17 18You should have received a copy of the GNU General Public License 19along with GCC; see the file COPYING3. If not see 20<http://www.gnu.org/licenses/>. */ 21 22/* This module provides a means for setting integral parameters 23 dynamically. Instead of encoding magic numbers in various places, 24 use this module to organize all the magic numbers in a single 25 place. The values of the parameters can be set on the 26 command-line, thereby providing a way to control the amount of 27 effort spent on particular optimization passes, or otherwise tune 28 the behavior of the compiler. 29 30 Since their values can be set on the command-line, these parameters 31 should not be used for non-dynamic memory allocation. */ 32 33#ifndef GCC_PARAMS_H 34#define GCC_PARAMS_H 35 36/* No parameter shall have this value. */ 37 38#define INVALID_PARAM_VAL (-1) 39 40/* The information associated with each parameter. */ 41 42typedef struct param_info 43{ 44 /* The name used with the `--param <name>=<value>' switch to set this 45 value. */ 46 const char *const option; 47 48 /* The default value. */ 49 int default_value; 50 51 /* Minimum acceptable value. */ 52 int min_value; 53 54 /* Maximum acceptable value, if greater than minimum */ 55 int max_value; 56 57 /* A short description of the option. */ 58 const char *const help; 59} param_info; 60 61/* An array containing the compiler parameters and their current 62 values. */ 63 64extern param_info *compiler_params; 65 66/* Returns the number of entries in the table, for the use by plugins. */ 67extern size_t get_num_compiler_params (void); 68 69/* Add the N PARAMS to the current list of compiler parameters. */ 70 71extern void add_params (const param_info params[], size_t n); 72 73/* Set the VALUE associated with the parameter given by NAME in the 74 table PARAMS using PARAMS_SET to indicate which have been 75 explicitly set. */ 76 77extern void set_param_value (const char *name, int value, 78 int *params, int *params_set); 79 80 81/* The parameters in use by language-independent code. */ 82 83typedef enum compiler_param 84{ 85#define DEFPARAM(enumerator, option, msgid, default, min, max) \ 86 enumerator, 87#include "params.def" 88#undef DEFPARAM 89 LAST_PARAM 90} compiler_param; 91 92/* The value of the parameter given by ENUM. Not an lvalue. */ 93#define PARAM_VALUE(ENUM) \ 94 ((int) global_options.x_param_values[(int) ENUM]) 95 96/* Set the value of the parameter given by NUM to VALUE, implicitly, 97 if it has not been set explicitly by the user, in the table PARAMS 98 using PARAMS_SET to indicate which have been explicitly set. */ 99 100extern void maybe_set_param_value (compiler_param num, int value, 101 int *params, int *params_set); 102 103/* Set the default value of a parameter given by NUM to VALUE, before 104 option processing. */ 105 106extern void set_default_param_value (compiler_param num, int value); 107 108/* Note that all parameters have been added and all default values 109 set. */ 110extern void finish_params (void); 111 112/* Return the default value of parameter NUM. */ 113 114extern int default_param_value (compiler_param num); 115 116/* Initialize an array PARAMS with default values of the 117 parameters. */ 118extern void init_param_values (int *params); 119 120/* Macros for the various parameters. */ 121#define STRUCT_REORG_COLD_STRUCT_RATIO \ 122 PARAM_VALUE (PARAM_STRUCT_REORG_COLD_STRUCT_RATIO) 123#define MAX_INLINE_INSNS_SINGLE \ 124 PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE) 125#define MAX_INLINE_INSNS \ 126 PARAM_VALUE (PARAM_MAX_INLINE_INSNS) 127#define MAX_INLINE_SLOPE \ 128 PARAM_VALUE (PARAM_MAX_INLINE_SLOPE) 129#define MIN_INLINE_INSNS \ 130 PARAM_VALUE (PARAM_MIN_INLINE_INSNS) 131#define MAX_INLINE_INSNS_AUTO \ 132 PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO) 133#define MAX_VARIABLE_EXPANSIONS \ 134 PARAM_VALUE (PARAM_MAX_VARIABLE_EXPANSIONS) 135#define MIN_VECT_LOOP_BOUND \ 136 PARAM_VALUE (PARAM_MIN_VECT_LOOP_BOUND) 137#define MAX_DELAY_SLOT_INSN_SEARCH \ 138 PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH) 139#define MAX_DELAY_SLOT_LIVE_SEARCH \ 140 PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH) 141#define MAX_PENDING_LIST_LENGTH \ 142 PARAM_VALUE (PARAM_MAX_PENDING_LIST_LENGTH) 143#define MAX_GCSE_MEMORY \ 144 ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY)) 145#define MAX_GCSE_INSERTION_RATIO \ 146 ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_INSERTION_RATIO)) 147#define GCSE_AFTER_RELOAD_PARTIAL_FRACTION \ 148 PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_PARTIAL_FRACTION) 149#define GCSE_AFTER_RELOAD_CRITICAL_FRACTION \ 150 PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_CRITICAL_FRACTION) 151#define GCSE_COST_DISTANCE_RATIO \ 152 PARAM_VALUE (PARAM_GCSE_COST_DISTANCE_RATIO) 153#define GCSE_UNRESTRICTED_COST \ 154 PARAM_VALUE (PARAM_GCSE_UNRESTRICTED_COST) 155#define MAX_HOIST_DEPTH \ 156 PARAM_VALUE (PARAM_MAX_HOIST_DEPTH) 157#define MAX_UNROLLED_INSNS \ 158 PARAM_VALUE (PARAM_MAX_UNROLLED_INSNS) 159#define MAX_SMS_LOOP_NUMBER \ 160 PARAM_VALUE (PARAM_MAX_SMS_LOOP_NUMBER) 161#define SMS_MAX_II_FACTOR \ 162 PARAM_VALUE (PARAM_SMS_MAX_II_FACTOR) 163#define SMS_DFA_HISTORY \ 164 PARAM_VALUE (PARAM_SMS_DFA_HISTORY) 165#define SMS_LOOP_AVERAGE_COUNT_THRESHOLD \ 166 PARAM_VALUE (PARAM_SMS_LOOP_AVERAGE_COUNT_THRESHOLD) 167#define INTEGER_SHARE_LIMIT \ 168 PARAM_VALUE (PARAM_INTEGER_SHARE_LIMIT) 169#define MAX_LAST_VALUE_RTL \ 170 PARAM_VALUE (PARAM_MAX_LAST_VALUE_RTL) 171#define MIN_VIRTUAL_MAPPINGS \ 172 PARAM_VALUE (PARAM_MIN_VIRTUAL_MAPPINGS) 173#define VIRTUAL_MAPPINGS_TO_SYMS_RATIO \ 174 PARAM_VALUE (PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO) 175#define MAX_FIELDS_FOR_FIELD_SENSITIVE \ 176 ((size_t) PARAM_VALUE (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE)) 177#define MAX_SCHED_READY_INSNS \ 178 PARAM_VALUE (PARAM_MAX_SCHED_READY_INSNS) 179#define PREFETCH_LATENCY \ 180 PARAM_VALUE (PARAM_PREFETCH_LATENCY) 181#define SIMULTANEOUS_PREFETCHES \ 182 PARAM_VALUE (PARAM_SIMULTANEOUS_PREFETCHES) 183#define L1_CACHE_SIZE \ 184 PARAM_VALUE (PARAM_L1_CACHE_SIZE) 185#define L1_CACHE_LINE_SIZE \ 186 PARAM_VALUE (PARAM_L1_CACHE_LINE_SIZE) 187#define L2_CACHE_SIZE \ 188 PARAM_VALUE (PARAM_L2_CACHE_SIZE) 189#define USE_CANONICAL_TYPES \ 190 PARAM_VALUE (PARAM_USE_CANONICAL_TYPES) 191#define IRA_MAX_LOOPS_NUM \ 192 PARAM_VALUE (PARAM_IRA_MAX_LOOPS_NUM) 193#define IRA_MAX_CONFLICT_TABLE_SIZE \ 194 PARAM_VALUE (PARAM_IRA_MAX_CONFLICT_TABLE_SIZE) 195#define IRA_LOOP_RESERVED_REGS \ 196 PARAM_VALUE (PARAM_IRA_LOOP_RESERVED_REGS) 197#define SWITCH_CONVERSION_BRANCH_RATIO \ 198 PARAM_VALUE (PARAM_SWITCH_CONVERSION_BRANCH_RATIO) 199#define LOOP_INVARIANT_MAX_BBS_IN_LOOP \ 200 PARAM_VALUE (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP) 201#define SLP_MAX_INSNS_IN_BB \ 202 PARAM_VALUE (PARAM_SLP_MAX_INSNS_IN_BB) 203#define MIN_INSN_TO_PREFETCH_RATIO \ 204 PARAM_VALUE (PARAM_MIN_INSN_TO_PREFETCH_RATIO) 205#define PREFETCH_MIN_INSN_TO_MEM_RATIO \ 206 PARAM_VALUE (PARAM_PREFETCH_MIN_INSN_TO_MEM_RATIO) 207#define MIN_NONDEBUG_INSN_UID \ 208 PARAM_VALUE (PARAM_MIN_NONDEBUG_INSN_UID) 209#endif /* ! GCC_PARAMS_H */ 210