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/* Common hooks for ARM.
Copyright (C) 1991-2016 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tm_p.h"
#include "common/common-target.h"
#include "common/common-target-def.h"
#include "opts.h"
#include "flags.h"
/* Set default optimization options. */
static const struct default_options arm_option_optimization_table[] =
{
/* Enable section anchors by default at -O1 or higher. */
{ OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
{ OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
{ OPT_LEVELS_1_PLUS, OPT_fsched_pressure, NULL, 1 },
{ OPT_LEVELS_NONE, 0, NULL, 0 }
};
/* Implement TARGET_EXCEPT_UNWIND_INFO. */
enum unwind_info_type
arm_except_unwind_info (struct gcc_options *opts)
{
/* Honor the --enable-sjlj-exceptions configure switch. */
#ifdef CONFIG_SJLJ_EXCEPTIONS
if (CONFIG_SJLJ_EXCEPTIONS)
return UI_SJLJ;
#endif
/* If not using ARM EABI unwind tables... */
if (ARM_UNWIND_INFO)
{
/* For simplicity elsewhere in this file, indicate that all unwind
info is disabled if we're not emitting unwind tables. */
if (!opts->x_flag_exceptions && !opts->x_flag_unwind_tables)
return UI_NONE;
else
return UI_TARGET;
}
/* ... we use sjlj exceptions for backwards compatibility. */
return UI_SJLJ;
}
#define ARM_CPU_NAME_LENGTH 20
/* Truncate NAME at the first '.' character seen, or return
NAME unmodified. */
const char *
arm_rewrite_selected_cpu (const char *name)
{
static char output_buf[ARM_CPU_NAME_LENGTH + 1] = {0};
char *arg_pos;
strncpy (output_buf, name, ARM_CPU_NAME_LENGTH);
arg_pos = strchr (output_buf, '.');
/* If we found a '.' truncate the entry at that point. */
if (arg_pos)
*arg_pos = '\0';
return output_buf;
}
/* Called by the driver to rewrite a name passed to the -mcpu
argument in preparation to be passed to the assembler. The
names passed from the command line will be in ARGV, we want
to use the right-most argument, which should be in
ARGV[ARGC - 1]. ARGC should always be greater than 0. */
const char *
arm_rewrite_mcpu (int argc, const char **argv)
{
gcc_assert (argc);
return arm_rewrite_selected_cpu (argv[argc - 1]);
}
#undef ARM_CPU_NAME_LENGTH
#undef TARGET_DEFAULT_TARGET_FLAGS
#define TARGET_DEFAULT_TARGET_FLAGS (TARGET_DEFAULT | MASK_SCHED_PROLOG)
#undef TARGET_OPTION_OPTIMIZATION_TABLE
#define TARGET_OPTION_OPTIMIZATION_TABLE arm_option_optimization_table
#undef TARGET_EXCEPT_UNWIND_INFO
#define TARGET_EXCEPT_UNWIND_INFO arm_except_unwind_info
struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
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