ia64-common.c revision 1.7 
1/* Common hooks for IA64.
2   Copyright (C) 1999-2018 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 3, or (at your option)
9any later version.
10
11GCC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along 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 "memmodel.h"
26#include "tm_p.h"
27#include "common/common-target.h"
28#include "common/common-target-def.h"
29#include "opts.h"
30#include "flags.h"
31#include "params.h"
32
33/* Implement overriding of the optimization options.  */
34static const struct default_options ia64_option_optimization_table[] =
35  {
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
44static bool
45ia64_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
68enum unwind_info_type
69ia64_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
87static void
88ia64_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
113struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
114