gcc/common/config/ia64/ia64-common.c

   1 /* Common hooks for IA64.
   2    Copyright (C) 1999-2016 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "diagnostic-core.h"
  24 #include "tm.h"
  25 #include "tm_p.h"
  26 #include "common/common-target.h"
  27 #include "common/common-target-def.h"
  28 #include "opts.h"
  29 #include "flags.h"
  30 #include "params.h"
  31
  32 /* Implement overriding of the optimization options.  */
  33 static const struct default_options ia64_option_optimization_table[] =
  34   {
  35     { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
  36 #ifdef SUBTARGET_OPTIMIZATION_OPTIONS
  37     SUBTARGET_OPTIMIZATION_OPTIONS,
  38 #endif
  39     { OPT_LEVELS_NONE, 0, NULL, 0 }
  40   };
  41
  42 /* Implement TARGET_HANDLE_OPTION.  */
  43
  44 static bool
  45 ia64_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED,
  46                     struct gcc_options *opts_set ATTRIBUTE_UNUSED,
  47                     const struct cl_decoded_option *decoded,
  48                     location_t loc)
  49 {
  50   size_t code = decoded->opt_index;
  51   const char *arg = decoded->arg;
  52   int value = decoded->value;
  53
  54   switch (code)
  55     {
  56     case OPT_mtls_size_:
  57       if (value != 14 && value != 22 && value != 64)
  58         error_at (loc, "bad value %<%s%> for -mtls-size= switch", arg);
  59       return true;
  60
  61     default:
  62       return true;
  63     }
  64 }
  65
  66 /* Implement TARGET_EXCEPT_UNWIND_INFO.  */
  67
  68 enum unwind_info_type
  69 ia64_except_unwind_info (struct gcc_options *opts)
  70 {
  71   /* Honor the --enable-sjlj-exceptions configure switch.  */
  72 #ifdef CONFIG_SJLJ_EXCEPTIONS
  73   if (CONFIG_SJLJ_EXCEPTIONS)
  74     return UI_SJLJ;
  75 #endif
  76
  77   /* For simplicity elsewhere in this file, indicate that all unwind
  78      info is disabled if we're not emitting unwind tables.  */
  79   if (!opts->x_flag_exceptions && !opts->x_flag_unwind_tables)
  80     return UI_NONE;
  81
  82   return UI_TARGET;
  83 }
  84
  85 /* Implement TARGET_OPTION_DEFAULT_PARAMS.  */
  86
  87 static void
  88 ia64_option_default_params (void)
  89 {
  90   /* Let the scheduler form additional regions.  */
  91   set_default_param_value (PARAM_MAX_SCHED_EXTEND_REGIONS_ITERS, 2);
  92
  93   /* Set the default values for cache-related parameters.  */
  94   set_default_param_value (PARAM_SIMULTANEOUS_PREFETCHES, 6);
  95   set_default_param_value (PARAM_L1_CACHE_LINE_SIZE, 32);
  96
  97   set_default_param_value (PARAM_SCHED_MEM_TRUE_DEP_COST, 4);
  98 }
  99
 100 #undef TARGET_OPTION_OPTIMIZATION_TABLE
 101 #define TARGET_OPTION_OPTIMIZATION_TABLE ia64_option_optimization_table
 102 #undef TARGET_OPTION_DEFAULT_PARAMS
 103 #define TARGET_OPTION_DEFAULT_PARAMS ia64_option_default_params
 104
 105 #undef TARGET_EXCEPT_UNWIND_INFO
 106 #define TARGET_EXCEPT_UNWIND_INFO  ia64_except_unwind_info
 107
 108 #undef TARGET_DEFAULT_TARGET_FLAGS
 109 #define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT | TARGET_CPU_DEFAULT)
 110 #undef TARGET_HANDLE_OPTION
 111 #define TARGET_HANDLE_OPTION ia64_handle_option
 112
 113 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;