gcc/params.h

   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
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along 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
  42 typedef 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
  64 extern param_info *compiler_params;
  65
  66 /* Returns the number of entries in the table, for the use by plugins.  */
  67 extern size_t get_num_compiler_params (void);
  68
  69 /* Add the N PARAMS to the current list of compiler parameters.  */
  70
  71 extern 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
  77 extern void set_param_value (const char *name, int value,
  78                              int *params, int *params_set);
  79
  80 \f
  81 /* The parameters in use by language-independent code.  */
  82
  83 typedef 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
 100 extern 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
 106 extern void set_default_param_value (compiler_param num, int value);
 107
 108 /* Add all parameters and default values that can be set in both the
 109    driver and the compiler proper.  */
 110
 111 extern void global_init_params (void);
 112
 113 /* Note that all parameters have been added and all default values
 114    set.  */
 115 extern void finish_params (void);
 116
 117 /* Return the default value of parameter NUM.  */
 118
 119 extern int default_param_value (compiler_param num);
 120
 121 /* Initialize an array PARAMS with default values of the
 122    parameters.  */
 123 extern void init_param_values (int *params);
 124
 125 /* Macros for the various parameters.  */
 126 #define MAX_INLINE_INSNS_SINGLE \
 127   PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE)
 128 #define MAX_INLINE_INSNS \
 129   PARAM_VALUE (PARAM_MAX_INLINE_INSNS)
 130 #define MAX_INLINE_SLOPE \
 131   PARAM_VALUE (PARAM_MAX_INLINE_SLOPE)
 132 #define MIN_INLINE_INSNS \
 133   PARAM_VALUE (PARAM_MIN_INLINE_INSNS)
 134 #define MAX_INLINE_INSNS_AUTO \
 135   PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO)
 136 #define MAX_VARIABLE_EXPANSIONS \
 137   PARAM_VALUE (PARAM_MAX_VARIABLE_EXPANSIONS)
 138 #define MIN_VECT_LOOP_BOUND \
 139   PARAM_VALUE (PARAM_MIN_VECT_LOOP_BOUND)
 140 #define MAX_DELAY_SLOT_INSN_SEARCH \
 141   PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH)
 142 #define MAX_DELAY_SLOT_LIVE_SEARCH \
 143   PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH)
 144 #define MAX_PENDING_LIST_LENGTH \
 145   PARAM_VALUE (PARAM_MAX_PENDING_LIST_LENGTH)
 146 #define MAX_GCSE_MEMORY \
 147   ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY))
 148 #define MAX_GCSE_INSERTION_RATIO \
 149   ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_INSERTION_RATIO))
 150 #define GCSE_AFTER_RELOAD_PARTIAL_FRACTION \
 151   PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_PARTIAL_FRACTION)
 152 #define GCSE_AFTER_RELOAD_CRITICAL_FRACTION \
 153   PARAM_VALUE (PARAM_GCSE_AFTER_RELOAD_CRITICAL_FRACTION)
 154 #define GCSE_COST_DISTANCE_RATIO \
 155   PARAM_VALUE (PARAM_GCSE_COST_DISTANCE_RATIO)
 156 #define GCSE_UNRESTRICTED_COST \
 157   PARAM_VALUE (PARAM_GCSE_UNRESTRICTED_COST)
 158 #define MAX_HOIST_DEPTH \
 159   PARAM_VALUE (PARAM_MAX_HOIST_DEPTH)
 160 #define MAX_UNROLLED_INSNS \
 161   PARAM_VALUE (PARAM_MAX_UNROLLED_INSNS)
 162 #define MAX_SMS_LOOP_NUMBER \
 163   PARAM_VALUE (PARAM_MAX_SMS_LOOP_NUMBER)
 164 #define SMS_MAX_II_FACTOR \
 165   PARAM_VALUE (PARAM_SMS_MAX_II_FACTOR)
 166 #define SMS_DFA_HISTORY \
 167   PARAM_VALUE (PARAM_SMS_DFA_HISTORY)
 168 #define SMS_LOOP_AVERAGE_COUNT_THRESHOLD \
 169   PARAM_VALUE (PARAM_SMS_LOOP_AVERAGE_COUNT_THRESHOLD)
 170 #define INTEGER_SHARE_LIMIT \
 171   PARAM_VALUE (PARAM_INTEGER_SHARE_LIMIT)
 172 #define MAX_LAST_VALUE_RTL \
 173   PARAM_VALUE (PARAM_MAX_LAST_VALUE_RTL)
 174 #define MIN_VIRTUAL_MAPPINGS \
 175   PARAM_VALUE (PARAM_MIN_VIRTUAL_MAPPINGS)
 176 #define VIRTUAL_MAPPINGS_TO_SYMS_RATIO \
 177   PARAM_VALUE (PARAM_VIRTUAL_MAPPINGS_TO_SYMS_RATIO)
 178 #define MAX_FIELDS_FOR_FIELD_SENSITIVE \
 179   ((size_t) PARAM_VALUE (PARAM_MAX_FIELDS_FOR_FIELD_SENSITIVE))
 180 #define MAX_SCHED_READY_INSNS \
 181   PARAM_VALUE (PARAM_MAX_SCHED_READY_INSNS)
 182 #define PREFETCH_LATENCY \
 183   PARAM_VALUE (PARAM_PREFETCH_LATENCY)
 184 #define SIMULTANEOUS_PREFETCHES \
 185   PARAM_VALUE (PARAM_SIMULTANEOUS_PREFETCHES)
 186 #define L1_CACHE_SIZE \
 187   PARAM_VALUE (PARAM_L1_CACHE_SIZE)
 188 #define L1_CACHE_LINE_SIZE \
 189   PARAM_VALUE (PARAM_L1_CACHE_LINE_SIZE)
 190 #define L2_CACHE_SIZE \
 191   PARAM_VALUE (PARAM_L2_CACHE_SIZE)
 192 #define USE_CANONICAL_TYPES \
 193   PARAM_VALUE (PARAM_USE_CANONICAL_TYPES)
 194 #define IRA_MAX_LOOPS_NUM \
 195   PARAM_VALUE (PARAM_IRA_MAX_LOOPS_NUM)
 196 #define IRA_MAX_CONFLICT_TABLE_SIZE \
 197   PARAM_VALUE (PARAM_IRA_MAX_CONFLICT_TABLE_SIZE)
 198 #define IRA_LOOP_RESERVED_REGS \
 199   PARAM_VALUE (PARAM_IRA_LOOP_RESERVED_REGS)
 200 #define SWITCH_CONVERSION_BRANCH_RATIO \
 201   PARAM_VALUE (PARAM_SWITCH_CONVERSION_BRANCH_RATIO)
 202 #define LOOP_INVARIANT_MAX_BBS_IN_LOOP \
 203   PARAM_VALUE (PARAM_LOOP_INVARIANT_MAX_BBS_IN_LOOP)
 204 #define SLP_MAX_INSNS_IN_BB \
 205   PARAM_VALUE (PARAM_SLP_MAX_INSNS_IN_BB)
 206 #define MIN_INSN_TO_PREFETCH_RATIO \
 207   PARAM_VALUE (PARAM_MIN_INSN_TO_PREFETCH_RATIO)
 208 #define PREFETCH_MIN_INSN_TO_MEM_RATIO \
 209   PARAM_VALUE (PARAM_PREFETCH_MIN_INSN_TO_MEM_RATIO)
 210 #define MIN_NONDEBUG_INSN_UID \
 211   PARAM_VALUE (PARAM_MIN_NONDEBUG_INSN_UID)
 212 #define MAX_STORES_TO_SINK \
 213   PARAM_VALUE (PARAM_MAX_STORES_TO_SINK)
 214 #define ALLOW_LOAD_DATA_RACES \
 215   PARAM_VALUE (PARAM_ALLOW_LOAD_DATA_RACES)
 216 #define ALLOW_STORE_DATA_RACES \
 217   PARAM_VALUE (PARAM_ALLOW_STORE_DATA_RACES)
 218 #define ALLOW_PACKED_LOAD_DATA_RACES \
 219   PARAM_VALUE (PARAM_ALLOW_PACKED_LOAD_DATA_RACES)
 220 #define ALLOW_PACKED_STORE_DATA_RACES \
 221   PARAM_VALUE (PARAM_ALLOW_PACKED_STORE_DATA_RACES)
 222
 223 #endif /* ! GCC_PARAMS_H */