source: arduino-1-6-7/trunk/fuentes/arduino-ide-amd64/hardware/tools/avr/lib/gcc/avr/4.9.2/plugin/include/target.h @ 4837

Last change on this file since 4837 was 4837, checked in by daduve, 2 years ago

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[4837]1/* Data structure definitions for a generic GCC target.
2   Copyright (C) 2001-2014 Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify it
5   under the terms of the GNU General Public License as published by the
6   Free Software Foundation; either version 3, or (at your option) any
7   later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; see the file COPYING3.  If not see
16   <http://www.gnu.org/licenses/>.
17
18   In other words, you are welcome to use, share and improve this program.
19   You are forbidden to forbid anyone else to use, share and improve
20   what you give them.   Help stamp out software-hoarding!  */
21
22
23/* This file contains a data structure that describes a GCC target.
24   At present it is incomplete, but in future it should grow to
25   contain most or all target machine and target O/S specific
26   information.
27
28   This structure has its initializer declared in target-def.h in the
29   form of large macro TARGET_INITIALIZER that expands to many smaller
30   macros.
31
32   The smaller macros each initialize one component of the structure,
33   and each has a default.  Each target should have a file that
34   includes target.h and target-def.h, and overrides any inappropriate
35   defaults by undefining the relevant macro and defining a suitable
36   replacement.  That file should then contain the definition of
37   "targetm" like so:
38
39   struct gcc_target targetm = TARGET_INITIALIZER;
40
41   Doing things this way allows us to bring together everything that
42   defines a GCC target.  By supplying a default that is appropriate
43   to most targets, we can easily add new items without needing to
44   edit dozens of target configuration files.  It should also allow us
45   to gradually reduce the amount of conditional compilation that is
46   scattered throughout GCC.  */
47
48#ifndef GCC_TARGET_H
49#define GCC_TARGET_H
50
51#include "insn-modes.h"
52#include "insn-codes.h"
53#include "double-int.h"
54
55#ifdef ENABLE_CHECKING
56
57struct cumulative_args_t { void *magic; void *p; };
58
59#else /* !ENABLE_CHECKING */
60
61/* When using a GCC build compiler, we could use
62   __attribute__((transparent_union)) to get cumulative_args_t function
63   arguments passed like scalars where the ABI would mandate a less
64   efficient way of argument passing otherwise.  However, that would come
65   at the cost of less type-safe !ENABLE_CHECKING compilation.  */
66
67union cumulative_args_t { void *p; };
68
69#endif /* !ENABLE_CHECKING */
70
71/* Types used by the record_gcc_switches() target function.  */
72enum print_switch_type
73{
74  SWITCH_TYPE_PASSED,           /* A switch passed on the command line.  */
75  SWITCH_TYPE_ENABLED,          /* An option that is currently enabled.  */
76  SWITCH_TYPE_DESCRIPTIVE,      /* Descriptive text, not a switch or option.  */
77  SWITCH_TYPE_LINE_START,       /* Please emit any necessary text at the start of a line.  */
78  SWITCH_TYPE_LINE_END          /* Please emit a line terminator.  */
79};
80
81typedef int (* print_switch_fn_type) (print_switch_type, const char *);
82
83/* An example implementation for ELF targets.  Defined in varasm.c  */
84extern int elf_record_gcc_switches (print_switch_type type, const char *);
85
86/* Some places still assume that all pointer or address modes are the
87   standard Pmode and ptr_mode.  These optimizations become invalid if
88   the target actually supports multiple different modes.  For now,
89   we disable such optimizations on such targets, using this function.  */
90extern bool target_default_pointer_address_modes_p (void);
91
92struct stdarg_info;
93struct spec_info_def;
94struct hard_reg_set_container;
95struct cgraph_node;
96struct cgraph_simd_clone;
97
98/* The struct used by the secondary_reload target hook.  */
99struct secondary_reload_info
100{
101  /* icode is actually an enum insn_code, but we don't want to force every
102     file that includes target.h to include optabs.h .  */
103  int icode;
104  int extra_cost; /* Cost for using (a) scratch register(s) to be taken
105                     into account by copy_cost.  */
106  /* The next two members are for the use of the backward
107     compatibility hook.  */
108  struct secondary_reload_info *prev_sri;
109  int t_icode; /* Actually an enum insn_code - see above.  */
110};
111
112/* This is defined in sched-int.h .  */
113struct _dep;
114
115/* This is defined in ddg.h .  */
116struct ddg;
117
118/* This is defined in cfgloop.h .  */
119struct loop;
120
121/* This is defined in tree-ssa-alias.h.  */
122struct ao_ref;
123
124/* This is defined in tree-vectorizer.h.  */
125struct _stmt_vec_info;
126
127/* These are defined in tree-vect-stmts.c.  */
128extern tree stmt_vectype (struct _stmt_vec_info *);
129extern bool stmt_in_inner_loop_p (struct _stmt_vec_info *);
130
131/* Assembler instructions for creating various kinds of integer object.  */
132
133struct asm_int_op
134{
135  const char *hi;
136  const char *si;
137  const char *di;
138  const char *ti;
139};
140
141/* Types of costs for vectorizer cost model.  */
142enum vect_cost_for_stmt
143{
144  scalar_stmt,
145  scalar_load,
146  scalar_store,
147  vector_stmt,
148  vector_load,
149  unaligned_load,
150  unaligned_store,
151  vector_store,
152  vec_to_scalar,
153  scalar_to_vec,
154  cond_branch_not_taken,
155  cond_branch_taken,
156  vec_perm,
157  vec_promote_demote,
158  vec_construct
159};
160
161/* Separate locations for which the vectorizer cost model should
162   track costs.  */
163enum vect_cost_model_location {
164  vect_prologue = 0,
165  vect_body = 1,
166  vect_epilogue = 2
167};
168
169/* The target structure.  This holds all the backend hooks.  */
170#define DEFHOOKPOD(NAME, DOC, TYPE, INIT) TYPE NAME;
171#define DEFHOOK(NAME, DOC, TYPE, PARAMS, INIT) TYPE (* NAME) PARAMS;
172#define DEFHOOK_UNDOC DEFHOOK
173#define HOOKSTRUCT(FRAGMENT) FRAGMENT
174
175#include "target.def"
176
177extern struct gcc_target targetm;
178
179#ifdef GCC_TM_H
180
181#ifndef CUMULATIVE_ARGS_MAGIC
182#define CUMULATIVE_ARGS_MAGIC ((void *) &targetm.calls)
183#endif
184
185static inline CUMULATIVE_ARGS *
186get_cumulative_args (cumulative_args_t arg)
187{
188#ifdef ENABLE_CHECKING
189  gcc_assert (arg.magic == CUMULATIVE_ARGS_MAGIC);
190#endif /* ENABLE_CHECKING */
191  return (CUMULATIVE_ARGS *) arg.p;
192}
193
194static inline cumulative_args_t
195pack_cumulative_args (CUMULATIVE_ARGS *arg)
196{
197  cumulative_args_t ret;
198
199#ifdef ENABLE_CHECKING
200  ret.magic = CUMULATIVE_ARGS_MAGIC;
201#endif /* ENABLE_CHECKING */
202  ret.p = (void *) arg;
203  return ret;
204}
205#endif /* GCC_TM_H */
206
207#endif /* GCC_TARGET_H */
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