params.h revision 117395
1/* params.h - Run-time parameters. 2 Copyright (C) 2001 Free Software Foundation, Inc. 3 Written by Mark Mitchell <mark@codesourcery.com>. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify it under 8the terms of the GNU General Public License as published by the Free 9Software Foundation; either version 2, or (at your option) any later 10version. 11 12GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13WARRANTY; without even the implied warranty of MERCHANTABILITY or 14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to the Free 19Software Foundation, 59 Temple Place - Suite 330, Boston, MA 2002111-1307, 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 44typedef 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 /* A short description of the option. */ 52 const char *const help; 53} param_info; 54 55/* An array containing the compiler parameters and their current 56 values. */ 57 58extern param_info *compiler_params; 59 60/* Add the N PARAMS to the current list of compiler parameters. */ 61 62extern void add_params 63 PARAMS ((const param_info params[], size_t n)); 64 65/* Set the VALUE associated with the parameter given by NAME. */ 66 67extern void set_param_value 68 PARAMS ((const char *name, int value)); 69 70 71/* The parameters in use by language-independent code. */ 72 73typedef enum compiler_param 74{ 75#define DEFPARAM(enumerator, option, msgid, default) \ 76 enumerator, 77#include "params.def" 78#undef DEFPARAM 79 LAST_PARAM 80} compiler_param; 81 82/* The value of the parameter given by ENUM. */ 83#define PARAM_VALUE(ENUM) \ 84 (compiler_params[(int) ENUM].value) 85 86/* Macros for the various parameters. */ 87#define MAX_INLINE_INSNS_SINGLE \ 88 PARAM_VALUE (PARAM_MAX_INLINE_INSNS_SINGLE) 89#define MAX_INLINE_INSNS \ 90 PARAM_VALUE (PARAM_MAX_INLINE_INSNS) 91#define MAX_INLINE_SLOPE \ 92 PARAM_VALUE (PARAM_MAX_INLINE_SLOPE) 93#define MIN_INLINE_INSNS \ 94 PARAM_VALUE (PARAM_MIN_INLINE_INSNS) 95#define MAX_INLINE_INSNS_AUTO \ 96 PARAM_VALUE (PARAM_MAX_INLINE_INSNS_AUTO) 97#define MAX_INLINE_INSNS_RTL \ 98 PARAM_VALUE (PARAM_MAX_INLINE_INSNS_RTL) 99#define MAX_DELAY_SLOT_INSN_SEARCH \ 100 PARAM_VALUE (PARAM_MAX_DELAY_SLOT_INSN_SEARCH) 101#define MAX_DELAY_SLOT_LIVE_SEARCH \ 102 PARAM_VALUE (PARAM_MAX_DELAY_SLOT_LIVE_SEARCH) 103#define MAX_PENDING_LIST_LENGTH \ 104 PARAM_VALUE (PARAM_MAX_PENDING_LIST_LENGTH) 105#define MAX_GCSE_MEMORY \ 106 ((size_t) PARAM_VALUE (PARAM_MAX_GCSE_MEMORY)) 107#define MAX_GCSE_PASSES \ 108 PARAM_VALUE (PARAM_MAX_GCSE_PASSES) 109#define MAX_UNROLLED_INSNS \ 110 PARAM_VALUE (PARAM_MAX_UNROLLED_INSNS) 111#endif /* ! GCC_PARAMS_H */ 112