/* Command line option handling.
   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
   Free Software Foundation, Inc.
   Contributed by Neil Booth.

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 2, 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 COPYING.  If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.  */

#include "config.h"
#include "system.h"
#include "intl.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "rtl.h"
#include "ggc.h"
#include "output.h"
#include "langhooks.h"
#include "opts.h"
#include "options.h"
#include "flags.h"
#include "toplev.h"
#include "params.h"
#include "diagnostic.h"
#include "tm_p.h"		/* For OPTIMIZATION_OPTIONS.  */
#include "insn-attr.h"		/* For INSN_SCHEDULING.  */
#include "target.h"
/* APPLE LOCAL optimization pragmas 3124235/3420242 */
#include "hashtab.h"
#include "tree-pass.h"

/* Value of the -G xx switch, and whether it was passed or not.  */
unsigned HOST_WIDE_INT g_switch_value;
bool g_switch_set;

/* True if we should exit after parsing options.  */
bool exit_after_options;

/* Print various extra warnings.  -W/-Wextra.  */
bool extra_warnings;

/* True to warn about any objects definitions whose size is larger
   than N bytes.  Also want about function definitions whose returned
   values are larger than N bytes, where N is `larger_than_size'.  */
bool warn_larger_than;
HOST_WIDE_INT larger_than_size;

/* Nonzero means warn about constructs which might not be
   strict-aliasing safe.  */
int warn_strict_aliasing;

/* Nonzero means warn about optimizations which rely on undefined
   signed overflow.  */
int warn_strict_overflow;

/* Hack for cooperation between set_Wunused and set_Wextra.  */
static bool maybe_warn_unused_parameter;

/* Type(s) of debugging information we are producing (if any).  See
   flags.h for the definitions of the different possible types of
   debugging information.  */
enum debug_info_type write_symbols = NO_DEBUG;

/* Level of debugging information we are producing.  See flags.h for
   the definitions of the different possible levels.  */
enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;

/* Nonzero means use GNU-only extensions in the generated symbolic
   debugging information.  Currently, this only has an effect when
   write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG.  */
bool use_gnu_debug_info_extensions;

/* The default visibility for all symbols (unless overridden) */
enum symbol_visibility default_visibility = VISIBILITY_DEFAULT;

/* Disable unit-at-a-time for frontends that might be still broken in this
   respect.  */
  
bool no_unit_at_a_time_default;

/* Global visibility options.  */
struct visibility_flags visibility_options;

/* Columns of --help display.  */
static unsigned int columns = 80;

/* What to print when a switch has no documentation.  */
static const char undocumented_msg[] = N_("This switch lacks documentation");

/* Used for bookkeeping on whether user set these flags so
   -fprofile-use/-fprofile-generate does not use them.  */
static bool profile_arc_flag_set, flag_profile_values_set;
static bool flag_unroll_loops_set, flag_tracer_set;
static bool flag_value_profile_transformations_set;
static bool flag_peel_loops_set, flag_branch_probabilities_set;

/* Input file names.  */
const char **in_fnames;
unsigned num_in_fnames;

static int common_handle_option (size_t scode, const char *arg, int value,
				 unsigned int lang_mask);
static void handle_param (const char *);
static void set_Wextra (int);
static unsigned int handle_option (const char **argv, unsigned int lang_mask);
static char *write_langs (unsigned int lang_mask);
static void complain_wrong_lang (const char *, const struct cl_option *,
				 unsigned int lang_mask);
static void handle_options (unsigned int, const char **, unsigned int);
static void wrap_help (const char *help, const char *item, unsigned int);
static void print_target_help (void);
static void print_help (void);
static void print_param_help (void);
static void print_filtered_help (unsigned int);
static unsigned int print_switch (const char *text, unsigned int indent);
static void set_debug_level (enum debug_info_type type, int extended,
			     const char *arg);

/* If ARG is a non-negative integer made up solely of digits, return its
   value, otherwise return -1.  */
static int
integral_argument (const char *arg)
{
  const char *p = arg;

  while (*p && ISDIGIT (*p))
    p++;

  if (*p == '\0')
    return atoi (arg);

  return -1;
}

/* Return a malloced slash-separated list of languages in MASK.  */
static char *
write_langs (unsigned int mask)
{
  unsigned int n = 0, len = 0;
  const char *lang_name;
  char *result;

  for (n = 0; (lang_name = lang_names[n]) != 0; n++)
    if (mask & (1U << n))
      len += strlen (lang_name) + 1;

  result = XNEWVEC (char, len);
  len = 0;
  for (n = 0; (lang_name = lang_names[n]) != 0; n++)
    if (mask & (1U << n))
      {
	if (len)
	  result[len++] = '/';
	strcpy (result + len, lang_name);
	len += strlen (lang_name);
      }

  result[len] = 0;

  return result;
}

/* Complain that switch OPT_INDEX does not apply to this front end.  */
static void
complain_wrong_lang (const char *text, const struct cl_option *option,
		     unsigned int lang_mask)
{
  char *ok_langs, *bad_lang;

  ok_langs = write_langs (option->flags);
  bad_lang = write_langs (lang_mask);

  /* Eventually this should become a hard error IMO.  */
  warning (0, "command line option \"%s\" is valid for %s but not for %s",
	   text, ok_langs, bad_lang);

  free (ok_langs);
  free (bad_lang);
}

/* Handle the switch beginning at ARGV for the language indicated by
   LANG_MASK.  Returns the number of switches consumed.  */
static unsigned int
handle_option (const char **argv, unsigned int lang_mask)
{
  size_t opt_index;
  const char *opt, *arg = 0;
  char *dup = 0;
  int value = 1;
  unsigned int result = 0;
  const struct cl_option *option;

  opt = argv[0];

  opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
  if (opt_index == cl_options_count
      && (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm')
      && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
    {
      /* Drop the "no-" from negative switches.  */
      size_t len = strlen (opt) - 3;

      dup = XNEWVEC (char, len + 1);
      dup[0] = '-';
      dup[1] = opt[1];
      memcpy (dup + 2, opt + 5, len - 2 + 1);
      opt = dup;
      value = 0;
      opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
    }

  if (opt_index == cl_options_count)
    goto done;

  option = &cl_options[opt_index];

  /* Reject negative form of switches that don't take negatives as
     unrecognized.  */
  if (!value && (option->flags & CL_REJECT_NEGATIVE))
    goto done;

  /* We've recognized this switch.  */
  result = 1;

  /* Check to see if the option is disabled for this configuration.  */
  if (option->flags & CL_DISABLED)
    {
      error ("command line option %qs"
	     " is not supported by this configuration", opt);
      goto done;
    }

  /* Sort out any argument the switch takes.  */
  if (option->flags & CL_JOINED)
    {
      /* Have arg point to the original switch.  This is because
	 some code, such as disable_builtin_function, expects its
	 argument to be persistent until the program exits.  */
      arg = argv[0] + cl_options[opt_index].opt_len + 1;
      if (!value)
	arg += strlen ("no-");

      if (*arg == '\0' && !(option->flags & CL_MISSING_OK))
	{
	  if (option->flags & CL_SEPARATE)
	    {
	      arg = argv[1];
	      result = 2;
	    }
	  else
	    /* Missing argument.  */
	    arg = NULL;
	}
    }
  else if (option->flags & CL_SEPARATE)
    {
      arg = argv[1];
      result = 2;
    }

  /* Now we've swallowed any potential argument, complain if this
     is a switch for a different front end.  */
  if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET)))
    {
      complain_wrong_lang (argv[0], option, lang_mask);
      goto done;
    }
  /* APPLE LOCAL begin iframework for 4.3 4094959 */
  else if ((option->flags & CL_TARGET)
	   && (option->flags & CL_LANG_ALL)
	   && !(option->flags & lang_mask))
    {
      /* Complain for target flag language mismatches if any languages
	 are specified.  */
      complain_wrong_lang (argv[0], option, lang_mask);
      goto done;
    }
  /* APPLE LOCAL end iframework for 4.3 4094959 */

  if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
    {
      if (!lang_hooks.missing_argument (opt, opt_index))
	error ("missing argument to \"%s\"", opt);
      goto done;
    }

  /* If the switch takes an integer, convert it.  */
  if (arg && (option->flags & CL_UINTEGER))
    {
      value = integral_argument (arg);
      if (value == -1)
	{
	  error ("argument to \"%s\" should be a non-negative integer",
		 option->opt_text);
	  goto done;
	}
    }

  if (option->flag_var)
    switch (option->var_type)
      {
      case CLVC_BOOLEAN:
	*(int *) option->flag_var = value;
	break;

      case CLVC_EQUAL:
	*(int *) option->flag_var = (value
				     ? option->var_value
				     : !option->var_value);
	break;

      case CLVC_BIT_CLEAR:
      case CLVC_BIT_SET:
	if ((value != 0) == (option->var_type == CLVC_BIT_SET))
	  *(int *) option->flag_var |= option->var_value;
	else
	  *(int *) option->flag_var &= ~option->var_value;
	if (option->flag_var == &target_flags)
	  target_flags_explicit |= option->var_value;
	break;

      case CLVC_STRING:
	*(const char **) option->flag_var = arg;
	break;
      }
  
/* APPLE LOCAL begin optimization pragmas 3124235/3420242 */
  else if (option->access_flag)
    switch (option->var_type)
      {
      case CLVC_BOOLEAN:
	(option->access_flag) (value, 1);
	break;

      case CLVC_EQUAL:
	(option->access_flag) (value
			       ? option->var_value
			       : !option->var_value,
			       1);
	break;

      case CLVC_BIT_CLEAR:
      case CLVC_BIT_SET:
      case CLVC_STRING:
	/* Not yet supported.  */
	gcc_unreachable ();
	break;
      }
/* APPLE LOCAL end optimization pragmas 3124235/3420242 */

  if (option->flags & lang_mask)
    if (lang_hooks.handle_option (opt_index, arg, value) == 0)
      result = 0;

  if (result && (option->flags & CL_COMMON))
    if (common_handle_option (opt_index, arg, value, lang_mask) == 0)
      result = 0;

  if (result && (option->flags & CL_TARGET))
    if (!targetm.handle_option (opt_index, arg, value))
      result = 0;

 done:
  if (dup)
    free (dup);
  return result;
}

/* Handle FILENAME from the command line.  */
static void
add_input_filename (const char *filename)
{
  num_in_fnames++;
  in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0]));
  in_fnames[num_in_fnames - 1] = filename;
}

/* Decode and handle the vector of command line options.  LANG_MASK
   contains has a single bit set representing the current
   language.  */
static void
handle_options (unsigned int argc, const char **argv, unsigned int lang_mask)
{
  unsigned int n, i;

  for (i = 1; i < argc; i += n)
    {
      const char *opt = argv[i];

      /* Interpret "-" or a non-switch as a file name.  */
      if (opt[0] != '-' || opt[1] == '\0')
	{
	  if (main_input_filename == NULL)
	    main_input_filename = opt;
	  add_input_filename (opt);
	  n = 1;
	  continue;
	}

      n = handle_option (argv + i, lang_mask);

      if (!n)
	{
	  n = 1;
	  error ("unrecognized command line option \"%s\"", opt);
	}
    }
}

/* APPLE LOCAL begin optimization pragmas 3124235/3420242 */
/* Use OPTIMIZE and OPTIMIZE_SIZE to set default values of more
   detailed flags that they control.  CMDLINE tells whether this
   is the first call, from the command line, or a later call due
   to user pragmas.  Those flags which are not safe to change on
   a per-function basis are not reset when !CMDLINE.  (FIXME:
   There should be some better way to identify these than handcoding.) */

void set_flags_from_O (unsigned int cmdline)
{
  /* Reset flags to the "raw" state before command line processing,
     except for optimize and optimize_size.  */
  int save_optimize_size = optimize_size;
  int save_optimize = optimize;
  cl_pf_opts = cl_pf_opts_raw;
  optimize = save_optimize;
  optimize_size = save_optimize_size;

  if (!optimize)
    {
      if (cmdline)
	flag_merge_constants = 0;
      /* APPLE LOCAL ARM structor thunks */
      flag_clone_structors = 1;
    }

  if (optimize >= 1)
    {
      flag_defer_pop = 1;
#ifdef DELAY_SLOTS
      flag_delayed_branch = 1;
#endif
#ifdef CAN_DEBUG_WITHOUT_FP
      flag_omit_frame_pointer = 1;
#endif
      flag_guess_branch_prob = 1;
      flag_cprop_registers = 1;
      flag_if_conversion = 1;
      flag_if_conversion2 = 1;
      flag_ipa_pure_const = 1;
      flag_ipa_reference = 1;
      flag_tree_ccp = 1;
      flag_tree_dce = 1;
      flag_tree_dom = 1;
      flag_tree_dse = 1;
      flag_tree_ter = 1;
      flag_tree_live_range_split = 1;
      flag_tree_sra = 1;
      flag_tree_copyrename = 1;
      flag_tree_fre = 1;
      flag_tree_copy_prop = 1;
      flag_tree_sink = 1;
      flag_tree_salias = 1;
      if (!no_unit_at_a_time_default)
	/* APPLE LOCAL optimization pragmas 3124235/3420242 */
	if (cmdline) flag_unit_at_a_time = 1;

      if (!optimize_size)
	{
	  /* Loop header copying usually increases size of the code.  This used
	     not to be true, since quite often it is possible to verify that
	     the condition is satisfied in the first iteration and therefore
	     to eliminate it.  Jump threading handles these cases now.  */
	  flag_tree_ch = 1;
	}
    }

  if (optimize >= 2)
    {
      flag_thread_jumps = 1;
      flag_crossjumping = 1;
      flag_optimize_sibling_calls = 1;
      flag_cse_follow_jumps = 1;
      flag_cse_skip_blocks = 1;
      flag_gcse = 1;
      flag_expensive_optimizations = 1;
      flag_ipa_type_escape = 1;
      flag_rerun_cse_after_loop = 1;
      flag_caller_saves = 1;
      flag_peephole2 = 1;
#ifdef INSN_SCHEDULING
      flag_schedule_insns = 1;
      flag_schedule_insns_after_reload = 1;
#endif
      flag_regmove = 1;
      /* APPLE LOCAL optimization pragmas 3124235/3420242 */
      if (cmdline) flag_strict_aliasing = 1;
      flag_strict_overflow = 1;
      flag_delete_null_pointer_checks = 1;
      flag_reorder_blocks = 1;
      /* APPLE LOCAL optimization pragmas 3124235/3420242 */
      if (cmdline) flag_reorder_functions = 1;
      flag_tree_store_ccp = 1;
      flag_tree_store_copy_prop = 1;
      flag_tree_vrp = 1;

      if (!optimize_size)
	{
          /* PRE tends to generate bigger code.  */
          flag_tree_pre = 1;
	}
      /* LLVM LOCAL begin */
#ifdef ENABLE_LLVM
      /* Enable loop unrolling at -O2 if -f[no-]unroll-loops is not used.  */
      if (!flag_unroll_loops_set && !optimize_size)
        flag_unroll_loops = 1;
      /* Enable llvm inliner at -O2. */
      if (cmdline)
        flag_inline_functions = 1;
#endif
      /* LLVM LOCAL end */
    }

  if (optimize >= 3)
    {
      if (cmdline)
        flag_inline_functions = 1;
      flag_unswitch_loops = 1;
      flag_gcse_after_reload = 1;
    }

  if (optimize < 2 || optimize_size)
    {
      align_loops = 1;
      align_jumps = 1;
      align_labels = 1;
      if (cmdline)
        align_functions = 1;

      /* Don't reorder blocks when optimizing for size because extra
	 jump insns may be created; also barrier may create extra padding.

	 More correctly we should have a block reordering mode that tried
	 to minimize the combined size of all the jumps.  This would more
	 or less automatically remove extra jumps, but would also try to
	 use more short jumps instead of long jumps.  */
      flag_reorder_blocks = 0;
      flag_reorder_blocks_and_partition = 0;
    }

  if (optimize_size)
    {
      if (cmdline)
	{
          /* APPLE LOCAL begin 4200438, 4209014 */
	  /* Set inlining heuristic at 450 for C and ObjC; 30 for every other language.  */
	  int estimated_insns =  (!strcmp (lang_hooks.name, "GNU C")
				  || !strcmp (lang_hooks.name, "GNU Objective-C"))
	    ? 450 : 30;
	  /* Inlining of very small functions usually reduces total size.  */
	  set_param_value ("max-inline-insns-single", estimated_insns);
	  set_param_value ("max-inline-insns-auto", 30);
	  /* APPLE LOCAL end 4200438, 4209014 */
					
	  flag_inline_functions = 1;

	  /* We want to crossjump as much as possible.  */
	  set_param_value ("min-crossjump-insns", 1);
	}
    }
}
 
/* Parse command line options and set default flag values.  Do minimal
   options processing.  */
void
decode_options (unsigned int argc, const char **argv)
{
  unsigned int i, lang_mask;
  /* APPLE LOCAL 4231773 */
  unsigned int optimize_size_z = 0;
  /* APPLE LOCAL AV 3846092 */
  int saved_flag_strict_aliasing;

  /* Perform language-specific options initialization.  */
  lang_mask = lang_hooks.init_options (argc, argv);

  lang_hooks.initialize_diagnostics (global_dc);

  /* Make a backup copy of the default, pre-command line options.
     Note this includes "optimize" and "optimize_size".  */
  cl_pf_opts_raw = cl_pf_opts;

  /* Scan to see what optimization level has been specified.  That will
     determine the default value of many flags.  */
  for (i = 1; i < argc; i++)
    {
      if (!strcmp (argv[i], "-O"))
	{
	  optimize = 1;
	  optimize_size = 0;
	}
      else if (argv[i][0] == '-' && argv[i][1] == 'O')
	{
	  /* Handle -Os, -O2, -O3, -O69, ...  */
	  const char *p = &argv[i][2];

	  /* APPLE LOCAL begin 4231773 */
	  if ((p[0] == 's' || p[0] == 'z') && (p[1] == 0))
	    {
	      optimize_size = 1;
	      optimize_size_z = (p[0] == 'z');
	      /* APPLE LOCAL end 4231773 */

	      /* Optimizing for size forces optimize to be 2.  */
	      optimize = 2;
	    }
	  else
	    {
	      const int optimize_val = read_integral_parameter (p, p - 2, -1);
	      if (optimize_val != -1)
		{
		  optimize = optimize_val;
		  optimize_size = 0;
		}
	    }
	}
        /* APPLE LOCAL begin -fast or -fastf or -fastcp */
      else if (argv[i][0] == '-' && argv[i][1] == 'f')
        {
          const char *p = &argv[i][2];
          if (!strcmp(p, "ast"))
            flag_fast = 1;
          else if (!strcmp(p, "astf"))
            flag_fastf = 1;
          else if (!strcmp(p, "astcp"))
            flag_fastcp = 1;
        }
    }

    if (flag_fast || flag_fastf || flag_fastcp )
    {
      optimize = 3;
      optimize_size = 0;
      /* This goes here, rather than in rs6000.c, so that
	 later -fcommon can override it.  */
      if (flag_fast || flag_fastcp)
        flag_no_common = 1;
    }
    /* APPLE LOCAL end -fast or -fastf or -fastcp */

  set_flags_from_O (true);
/* APPLE LOCAL end optimization pragmas 3124235/3420242 */

  /* Initialize whether `char' is signed.  */
  flag_signed_char = DEFAULT_SIGNED_CHAR;
  /* Set this to a special "uninitialized" value.  The actual default is set
     after target options have been processed.  */
  flag_short_enums = 2;

  /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
     modify it.  */
  target_flags = targetm.default_target_flags;

  /* Some tagets have ABI-specified unwind tables.  */
  flag_unwind_tables = targetm.unwind_tables_default;

#ifdef OPTIMIZATION_OPTIONS
  /* Allow default optimizations to be specified on a per-machine basis.  */
  OPTIMIZATION_OPTIONS (optimize, optimize_size);
#endif

  /* APPLE LOCAL begin AV 3846092 */
  /* We have apple local patch to disable -fstrict-aliasing when -O2 is used.
     However do not disable it when -ftree-vectorize is used. Clobber its value
     here to catch command line use of strict aliasing option.  */
  saved_flag_strict_aliasing = flag_strict_aliasing;
  flag_strict_aliasing = 9;
  /* APPLE LOCAL end AV 3846092 */
  handle_options (argc, argv, lang_mask);

  if (flag_pie)
    flag_pic = flag_pie;
  if (flag_pic && !flag_pie)
    flag_shlib = 1;

  if (flag_no_inline == 2)
    flag_no_inline = 0;
  else
    flag_really_no_inline = flag_no_inline;

  /* Set flag_no_inline before the post_options () hook.  The C front
     ends use it to determine tree inlining defaults.  FIXME: such
     code should be lang-independent when all front ends use tree
     inlining, in which case it, and this condition, should be moved
     to the top of process_options() instead.  */
  if (optimize == 0)
    {
      /* Inlining does not work if not optimizing,
	 so force it not to be done.  */
      flag_no_inline = 1;
      warn_inline = 0;

      /* The c_decode_option function and decode_option hook set
	 this to `2' if -Wall is used, so we can avoid giving out
	 lots of errors for people who don't realize what -Wall does.  */
      if (warn_uninitialized == 1)
	warning (OPT_Wuninitialized,
		 "-Wuninitialized is not supported without -O");
    }

  if (flag_really_no_inline == 2)
    flag_really_no_inline = flag_no_inline;

  /* The optimization to partition hot and cold basic blocks into separate
     sections of the .o and executable files does not work (currently)
     with exception handling.  This is because there is no support for
     generating unwind info.  If flag_exceptions is turned on we need to
     turn off the partitioning optimization.  */

  if (flag_exceptions && flag_reorder_blocks_and_partition)
    {
      inform 
	    ("-freorder-blocks-and-partition does not work with exceptions");
      flag_reorder_blocks_and_partition = 0;
      flag_reorder_blocks = 1;
    }

  /* If user requested unwind info, then turn off the partitioning
     optimization.  */

  if (flag_unwind_tables && ! targetm.unwind_tables_default
      && flag_reorder_blocks_and_partition)
    {
      inform ("-freorder-blocks-and-partition does not support unwind info");
      flag_reorder_blocks_and_partition = 0;
      flag_reorder_blocks = 1;
    }

  /* If the target requested unwind info, then turn off the partitioning
     optimization with a different message.  Likewise, if the target does not
     support named sections.  */

  if (flag_reorder_blocks_and_partition
      && (!targetm.have_named_sections
	  || (flag_unwind_tables && targetm.unwind_tables_default)))
    {
      inform 
       ("-freorder-blocks-and-partition does not work on this architecture");
      flag_reorder_blocks_and_partition = 0;
      flag_reorder_blocks = 1;
    }

  /* APPLE LOCAL begin AV 3846092 */
  /* We have apple local patch to disable -fstrict-aliasing when -O2 is used.
     Do not disable it when -ftree-vectorize is used.  */
  if (optimize >= 2 && flag_tree_vectorize)
    {
      /* If user explicitly requested to turn off strict aliasing then
	 ignore user request in this case. However issue warning to
	 remind user that -ftree-vectorize and -fno-strict-aliasing are
	 conflicting options. In this situation, -ftree-vectorize wins.  */
      if (flag_strict_aliasing == 0)
	inform ("-ftree-vectorize enables strict aliasing.  "
		"-fno-strict-aliasing is ignored when Auto Vectorization is used.");
      flag_strict_aliasing = 1;
    }
  else 
    if (flag_strict_aliasing == 9)
      /* User did not use any strict aliasing related command line option.
	 Restore saved value of this flag.  */
      flag_strict_aliasing = saved_flag_strict_aliasing;
  /* APPLE LOCAL end AV 3846092 */
  /* APPLE LOCAL begin 4224227, 4231773 */
  /* LLVM LOCAL begin */
#ifndef ENABLE_LLVM
  if (!optimize_size_z)
    optimize_size = 0;
#endif
  /* LLVM LOCAL end */
  /* APPLE LOCAL end 4224227, 4231773 */
}

/* Handle target- and language-independent options.  Return zero to
   generate an "unknown option" message.  Only options that need
   extra handling need to be listed here; if you simply want
   VALUE assigned to a variable, it happens automatically.  */

static int
common_handle_option (size_t scode, const char *arg, int value,
		      unsigned int lang_mask)
{
  enum opt_code code = (enum opt_code) scode;

  switch (code)
    {
    case OPT__help:
      print_help ();
      exit_after_options = true;
      break;

    case OPT__param:
      handle_param (arg);
      break;

    case OPT__target_help:
      print_target_help ();
      exit_after_options = true;
      break;

    case OPT__version:
      print_version (stderr, "");
      exit_after_options = true;
      break;

    case OPT_G:
      g_switch_value = value;
      g_switch_set = true;
      break;

    case OPT_O:
    case OPT_Os:
      /* Currently handled in a prescan.  */
      break;

    case OPT_W:
      /* For backward compatibility, -W is the same as -Wextra.  */
      set_Wextra (value);
      break;

    case OPT_Werror_:
      {
	char *new_option;
	int option_index;
	new_option = XNEWVEC (char, strlen (arg) + 2);
	new_option[0] = 'W';
	strcpy (new_option+1, arg);
	option_index = find_opt (new_option, lang_mask);
	if (option_index == N_OPTS)
	  {
	    error ("-Werror=%s: No option -%s", arg, new_option);
	  }
	else
	  {
	    int kind = value ? DK_ERROR : DK_WARNING;
	    diagnostic_classify_diagnostic (global_dc, option_index, kind);

	    /* -Werror=foo implies -Wfoo.  */
	    if (cl_options[option_index].var_type == CLVC_BOOLEAN
		&& cl_options[option_index].flag_var
		&& kind == DK_ERROR)
	      *(int *) cl_options[option_index].flag_var = 1;
	    free (new_option);
	  }
      }
      break;

    case OPT_Wextra:
      set_Wextra (value);
      break;

    case OPT_Wlarger_than_:
      larger_than_size = value;
      warn_larger_than = value != -1;
      break;

    case OPT_Wstrict_aliasing:
    case OPT_Wstrict_aliasing_:
      warn_strict_aliasing = value;
      break;

    case OPT_Wstrict_overflow:
      warn_strict_overflow = (value
			      ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
			      : 0);
      break;

    case OPT_Wstrict_overflow_:
      warn_strict_overflow = value;
      break;

    case OPT_Wunused:
      set_Wunused (value);
      break;

    case OPT_aux_info:
    case OPT_aux_info_:
      aux_info_file_name = arg;
      flag_gen_aux_info = 1;
      break;

    case OPT_auxbase:
      aux_base_name = arg;
      break;
      
      /* LLVM LOCAL begin */
    case OPT_mllvm:
      llvm_optns = arg;
      break;
      /* LLVM LOCAL end */

    case OPT_auxbase_strip:
      {
	char *tmp = xstrdup (arg);
	strip_off_ending (tmp, strlen (tmp));
	if (tmp[0])
	  aux_base_name = tmp;
      }
      break;

    case OPT_d:
      decode_d_option (arg);
      break;

    case OPT_dumpbase:
      dump_base_name = arg;
      break;

/* APPLE LOCAL begin optimization pragmas 3124235/3420242 */
/* APPLE LOCAL end optimization pragmas 3124235/3420242 */
    /* APPLE LOCAL begin falign-jumps-max-skip */
    case OPT_falign_jumps_max_skip_:
      align_jumps_max_skip = value;
      break;

    case OPT_falign_loops_max_skip_:
      align_loops_max_skip = value;
      break;
    /* APPLE LOCAL end falign-jumps-max-skip */

/* APPLE LOCAL begin optimization pragmas 3124235/3420242 */
/* APPLE LOCAL end optimization pragmas 3124235/3420242 */
    /* APPLE LOCAL begin predictive compilation */
    case OPT_fpredictive_compilation:
      predictive_compilation = 0;
      break;

    case OPT_fpredictive_compilation_:
      {
	char* buf = xmalloc (strlen(arg) + 1);
	sprintf (buf, "%d", value);
	if (strcmp(buf, arg))
	  {
	    error ("argument to \"-fpredictive-compilation=\" should be a valid non-negative integer instead of \"%s\"", arg);
	    value = 0;
	  }
	free(buf);
        predictive_compilation = value;
        break;
      }
    /* APPLE LOCAL end predictive compilation */

    case OPT_fbranch_probabilities:
      flag_branch_probabilities_set = true;
      break;

    case OPT_fcall_used_:
      fix_register (arg, 0, 1);
      break;

    case OPT_fcall_saved_:
      fix_register (arg, 0, 0);
      break;

    case OPT_fdiagnostics_show_location_:
      if (!strcmp (arg, "once"))
	diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
      else if (!strcmp (arg, "every-line"))
	diagnostic_prefixing_rule (global_dc)
	  = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
      else
	return 0;
      break;

    case OPT_fdiagnostics_show_option:
      global_dc->show_option_requested = true;
      break;

    case OPT_fdump_:
      if (!dump_switch_p (arg))
	return 0;
      break;

    case OPT_ffast_math:
      set_fast_math_flags (value);
      break;

    case OPT_ffixed_:
      fix_register (arg, 1, 1);
      break;

    case OPT_finline_limit_:
    case OPT_finline_limit_eq:
      set_param_value ("max-inline-insns-single", value / 2);
      set_param_value ("max-inline-insns-auto", value / 2);
      break;

    case OPT_fmessage_length_:
      pp_set_line_maximum_length (global_dc->printer, value);
      break;

    case OPT_fpack_struct_:
      if (value <= 0 || (value & (value - 1)) || value > 16)
	error("structure alignment must be a small power of two, not %d", value);
      else
	{
	  initial_max_fld_align = value;
	  maximum_field_alignment = value * BITS_PER_UNIT;
	}
      break;

    case OPT_fpeel_loops:
      flag_peel_loops_set = true;
      break;

    case OPT_fprofile_arcs:
      profile_arc_flag_set = true;
      break;

    /* APPLE LOCAL begin add fuse-profile */
    case OPT_fuse_profile:
    /* APPLE LOCAL end add fuse-profile */
    case OPT_fprofile_use:
      if (!flag_branch_probabilities_set)
        flag_branch_probabilities = value;
      if (!flag_profile_values_set)
        flag_profile_values = value;
      if (!flag_unroll_loops_set)
        flag_unroll_loops = value;
      if (!flag_peel_loops_set)
        flag_peel_loops = value;
      if (!flag_tracer_set)
        flag_tracer = value;
      if (!flag_value_profile_transformations_set)
        flag_value_profile_transformations = value;
      break;

    /* APPLE LOCAL begin add fcreate-profile */
    case OPT_fcreate_profile:
    /* APPLE LOCAL end add fcreate-profile */
    case OPT_fprofile_generate:
      if (!profile_arc_flag_set)
        profile_arc_flag = value;
      if (!flag_profile_values_set)
        flag_profile_values = value;
      if (!flag_value_profile_transformations_set)
        flag_value_profile_transformations = value;
      break;

    case OPT_fprofile_values:
      flag_profile_values_set = true;
      break;

    case OPT_fvisibility_:
      {
        if (!strcmp(arg, "default"))
          default_visibility = VISIBILITY_DEFAULT;
        else if (!strcmp(arg, "internal"))
          default_visibility = VISIBILITY_INTERNAL;
        else if (!strcmp(arg, "hidden"))
          default_visibility = VISIBILITY_HIDDEN;
        else if (!strcmp(arg, "protected"))
          default_visibility = VISIBILITY_PROTECTED;
        else
          error ("unrecognized visibility value \"%s\"", arg);
      }
      break;

    case OPT_fvpt:
      flag_value_profile_transformations_set = true;
      break;

    case OPT_frandom_seed:
      /* The real switch is -fno-random-seed.  */
      if (value)
	return 0;
      flag_random_seed = NULL;
      break;

    case OPT_frandom_seed_:
      flag_random_seed = arg;
      break;

/* APPLE LOCAL begin optimization pragmas 3124235/3420242 */
/* APPLE LOCAL end optimization pragmas 3124235/3420242 */

    case OPT_fsched_stalled_insns_:
      flag_sched_stalled_insns = value;
      if (flag_sched_stalled_insns == 0)
	flag_sched_stalled_insns = -1;
      break;

/* APPLE LOCAL begin optimization pragmas 3124235/3420242 */
/* APPLE LOCAL end optimization pragmas 3124235/3420242 */

    case OPT_fstack_limit:
      /* The real switch is -fno-stack-limit.  */
      if (value)
	return 0;
      stack_limit_rtx = NULL_RTX;
      break;

    case OPT_fstack_limit_register_:
      {
	int reg = decode_reg_name (arg);
	if (reg < 0)
	  error ("unrecognized register name \"%s\"", arg);
	else
	  stack_limit_rtx = gen_rtx_REG (Pmode, reg);
      }
      break;

    case OPT_fstack_limit_symbol_:
      stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
      break;

    case OPT_ftree_vectorizer_verbose_:
      vect_set_verbosity_level (arg);
      break;

    case OPT_ftls_model_:
      if (!strcmp (arg, "global-dynamic"))
	flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
      else if (!strcmp (arg, "local-dynamic"))
	flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
      else if (!strcmp (arg, "initial-exec"))
	flag_tls_default = TLS_MODEL_INITIAL_EXEC;
      else if (!strcmp (arg, "local-exec"))
	flag_tls_default = TLS_MODEL_LOCAL_EXEC;
      else
	warning (0, "unknown tls-model \"%s\"", arg);
      break;

    case OPT_ftracer:
      flag_tracer_set = true;
      break;

    case OPT_funroll_loops:
      flag_unroll_loops_set = true;
      break;

      /* APPLE LOCAL begin fwritable strings  */
    case OPT_fwritable_strings:
      flag_writable_strings = value;
      break;
      /* APPLE LOCAL end fwritable strings  */

    case OPT_g:
      set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
      break;

    case OPT_gcoff:
      set_debug_level (SDB_DEBUG, false, arg);
      break;

    case OPT_gdwarf_2:
      set_debug_level (DWARF2_DEBUG, false, arg);
      break;

    case OPT_ggdb:
      set_debug_level (NO_DEBUG, 2, arg);
      break;

    case OPT_gstabs:
    case OPT_gstabs_:
      set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
      break;

    case OPT_gvms:
      set_debug_level (VMS_DEBUG, false, arg);
      break;

    case OPT_gxcoff:
    case OPT_gxcoff_:
      set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
      break;

    case OPT_o:
      asm_file_name = arg;
      break;

    case OPT_pedantic_errors:
      flag_pedantic_errors = pedantic = 1;
      break;

    case OPT_fforce_mem:
      warning (0, "-f[no-]force-mem is nop and option will be removed in 4.3");
      break;

    case OPT_floop_optimize:
    case OPT_frerun_loop_opt:
    case OPT_fstrength_reduce:
      /* These are no-ops, preserved for backward compatibility.  */
      break;

    default:
      /* If the flag was handled in a standard way, assume the lack of
	 processing here is intentional.  */
      /* APPLE LOCAL optimization pragmas 3124235/3420242 */
      gcc_assert (cl_options[scode].flag_var || cl_options[scode].access_flag);
      break;
    }

  return 1;
}

/* Handle --param NAME=VALUE.  */
static void
handle_param (const char *carg)
{
  char *equal, *arg;
  int value;

  arg = xstrdup (carg);
  equal = strchr (arg, '=');
  if (!equal)
    error ("%s: --param arguments should be of the form NAME=VALUE", arg);
  else
    {
      value = integral_argument (equal + 1);
      if (value == -1)
	error ("invalid --param value %qs", equal + 1);
      else
	{
	  *equal = '\0';
	  set_param_value (arg, value);
	}
    }

  free (arg);
}

/* Handle -W and -Wextra.  */
static void
set_Wextra (int setting)
{
  extra_warnings = setting;
  warn_unused_value = setting;
  warn_unused_parameter = (setting && maybe_warn_unused_parameter);

  /* We save the value of warn_uninitialized, since if they put
     -Wuninitialized on the command line, we need to generate a
     warning about not using it without also specifying -O.  */
  if (setting == 0)
    warn_uninitialized = 0;
  else if (warn_uninitialized != 1)
    warn_uninitialized = 2;
}

/* Initialize unused warning flags.  */
void
set_Wunused (int setting)
{
  warn_unused_function = setting;
  warn_unused_label = setting;
  /* Unused function parameter warnings are reported when either
     ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified.
     Thus, if -Wextra has already been seen, set warn_unused_parameter;
     otherwise set maybe_warn_extra_parameter, which will be picked up
     by set_Wextra.  */
  maybe_warn_unused_parameter = setting;
  warn_unused_parameter = (setting && extra_warnings);
  warn_unused_variable = setting;
  warn_unused_value = setting;
}

/* The following routines are useful in setting all the flags that
   -ffast-math and -fno-fast-math imply.  */
void
set_fast_math_flags (int set)
{
  flag_trapping_math = !set;
  flag_unsafe_math_optimizations = set;
  flag_finite_math_only = set;
  flag_errno_math = !set;
  if (set)
    {
      flag_signaling_nans = 0;
      flag_rounding_math = 0;
      flag_cx_limited_range = 1;
    }
}

/* Return true iff flags are set as if -ffast-math.  */
bool
fast_math_flags_set_p (void)
{
  return (!flag_trapping_math
	  && flag_unsafe_math_optimizations
	  && flag_finite_math_only
	  && !flag_errno_math);
}

/* Handle a debug output -g switch.  EXTENDED is true or false to support
   extended output (2 is special and means "-ggdb" was given).  */
static void
set_debug_level (enum debug_info_type type, int extended, const char *arg)
{
  static bool type_explicit;

  use_gnu_debug_info_extensions = extended;

  if (type == NO_DEBUG)
    {
      if (write_symbols == NO_DEBUG)
	{
	  write_symbols = PREFERRED_DEBUGGING_TYPE;

	  if (extended == 2)
	    {
#ifdef DWARF2_DEBUGGING_INFO
	      write_symbols = DWARF2_DEBUG;
#elif defined DBX_DEBUGGING_INFO
	      write_symbols = DBX_DEBUG;
#endif
	    }

	  if (write_symbols == NO_DEBUG)
	    warning (0, "target system does not support debug output");
	}
    }
  else
    {
      /* Does it conflict with an already selected type?  */
      if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols)
	error ("debug format \"%s\" conflicts with prior selection",
	       debug_type_names[type]);
      write_symbols = type;
      type_explicit = true;
    }

  /* A debug flag without a level defaults to level 2.  */
  if (*arg == '\0')
    {
      if (!debug_info_level)
	debug_info_level = 2;
    }
  else
    {
      debug_info_level = integral_argument (arg);
      if (debug_info_level == (unsigned int) -1)
	error ("unrecognised debug output level \"%s\"", arg);
      else if (debug_info_level > 3)
	error ("debug output level %s is too high", arg);
    }
}

/* Display help for target options.  */
static void
print_target_help (void)
{
  unsigned int i;
  static bool displayed = false;

  /* Avoid double printing for --help --target-help.  */
  if (displayed)
    return;

  displayed = true;
  for (i = 0; i < cl_options_count; i++)
    if ((cl_options[i].flags & (CL_TARGET | CL_UNDOCUMENTED)) == CL_TARGET)
      {
	/* APPLE LOCAL default to Wformat-security 5764921 */
	printf ("%s", _("\nTarget specific options:\n"));
	print_filtered_help (CL_TARGET);
	break;
      }
}

/* Output --help text.  */
static void
print_help (void)
{
  size_t i;
  const char *p;

  GET_ENVIRONMENT (p, "COLUMNS");
  if (p)
    {
      int value = atoi (p);
      if (value > 0)
	columns = value;
    }

  puts (_("The following options are language-independent:\n"));

  print_filtered_help (CL_COMMON);
  print_param_help ();

  for (i = 0; lang_names[i]; i++)
    {
      printf (_("The %s front end recognizes the following options:\n\n"),
	      lang_names[i]);
      print_filtered_help (1U << i);
    }
  print_target_help ();
}

/* Print the help for --param.  */
static void
print_param_help (void)
{
  size_t i;

  puts (_("The --param option recognizes the following as parameters:\n"));

  for (i = 0; i < LAST_PARAM; i++)
    {
      const char *help = compiler_params[i].help;
      const char *param = compiler_params[i].option;

      if (help == NULL || *help == '\0')
	help = undocumented_msg;

      /* Get the translation.  */
      help = _(help);

      wrap_help (help, param, strlen (param));
    }

  putchar ('\n');
}

/* Print help for a specific front-end, etc.  */
static void
print_filtered_help (unsigned int flag)
{
  unsigned int i, len, filter, indent = 0;
  bool duplicates = false;
  const char *help, *opt, *tab;
  static char *printed;

  if (flag == CL_COMMON || flag == CL_TARGET)
    {
      filter = flag;
      if (!printed)
	printed = xmalloc (cl_options_count);
      memset (printed, 0, cl_options_count);
    }
  else
    {
      /* Don't print COMMON options twice.  */
      filter = flag | CL_COMMON;

      for (i = 0; i < cl_options_count; i++)
	{
	  if ((cl_options[i].flags & filter) != flag)
	    continue;

	  /* Skip help for internal switches.  */
	  if (cl_options[i].flags & CL_UNDOCUMENTED)
	    continue;

	  /* Skip switches that have already been printed, mark them to be
	     listed later.  */
	  if (printed[i])
	    {
	      duplicates = true;
	      indent = print_switch (cl_options[i].opt_text, indent);
	    }
	}

      if (duplicates)
	{
	  putchar ('\n');
	  putchar ('\n');
	}
    }

  for (i = 0; i < cl_options_count; i++)
    {
      if ((cl_options[i].flags & filter) != flag)
	continue;

      /* Skip help for internal switches.  */
      if (cl_options[i].flags & CL_UNDOCUMENTED)
	continue;

      /* Skip switches that have already been printed.  */
      if (printed[i])
	continue;

      printed[i] = true;

      help = cl_options[i].help;
      if (!help)
	help = undocumented_msg;

      /* Get the translation.  */
      help = _(help);

      tab = strchr (help, '\t');
      if (tab)
	{
	  len = tab - help;
	  opt = help;
	  help = tab + 1;
	}
      else
	{
	  opt = cl_options[i].opt_text;
	  len = strlen (opt);
	}

      wrap_help (help, opt, len);
    }

  putchar ('\n');
}

/* Output ITEM, of length ITEM_WIDTH, in the left column, followed by
   word-wrapped HELP in a second column.  */
static unsigned int
print_switch (const char *text, unsigned int indent)
{
  unsigned int len = strlen (text) + 1; /* trailing comma */

  if (indent)
    {
      putchar (',');
      if (indent + len > columns)
	{
	  putchar ('\n');
	  putchar (' ');
	  indent = 1;
	}
    }
  else
    putchar (' ');

  putchar (' ');
  fputs (text, stdout);

  return indent + len + 1;
}

/* Output ITEM, of length ITEM_WIDTH, in the left column, followed by
   word-wrapped HELP in a second column.  */
static void
wrap_help (const char *help, const char *item, unsigned int item_width)
{
  unsigned int col_width = 27;
  unsigned int remaining, room, len;

  remaining = strlen (help);

  do
    {
      room = columns - 3 - MAX (col_width, item_width);
      if (room > columns)
	room = 0;
      len = remaining;

      if (room < len)
	{
	  unsigned int i;

	  for (i = 0; help[i]; i++)
	    {
	      if (i >= room && len != remaining)
		break;
	      if (help[i] == ' ')
		len = i;
	      else if ((help[i] == '-' || help[i] == '/')
		       && help[i + 1] != ' '
		       && i > 0 && ISALPHA (help[i - 1]))
		len = i + 1;
	    }
	}

      printf( "  %-*.*s %.*s\n", col_width, item_width, item, len, help);
      item_width = 0;
      while (help[len] == ' ')
	len++;
      help += len;
      remaining -= len;
    }
  while (remaining);
}

/* APPLE LOCAL begin optimization pragmas 3124235/3420242 */
/* Find or allocate a cl_perfunc_opts to represent the current
   state of the per-function options, found in the global cl_pf_opts.
   There are logically not many of these, usually only 1, so we use 
   a small hash table to avoid unnecessary copies.  */

static htab_t cl_perfunc_opts_hash_table;

static hashval_t 
hash_cl_perfunc_opts (const void *p)
{
  const unsigned int *uip = p;
  unsigned int i;
  hashval_t h = 0;
  for (i = 0; i < sizeof (struct cl_perfunc_opts) / sizeof (int); i++)
    h += *uip++;
  return h;
}

static int 
cmp_cl_perfunc_opts (const void *p, const void *q)
{
  return !memcmp(p, q, sizeof(struct cl_perfunc_opts));
}

static struct cl_perfunc_opts *
make_perfunc_opts (void)
{
  PTR *slot;

  if (!cl_perfunc_opts_hash_table)
    cl_perfunc_opts_hash_table = htab_create (11, hash_cl_perfunc_opts,
	cmp_cl_perfunc_opts, NULL);
  slot = htab_find_slot (cl_perfunc_opts_hash_table, &cl_pf_opts,
	    INSERT);
  if (*slot == NULL)
    {
      *slot = xmalloc (sizeof (struct cl_perfunc_opts));
      memcpy (*slot, &cl_pf_opts, sizeof (struct cl_perfunc_opts));
    }
  return *slot;
}

/* Record the per-function opts in effect, and associate them with
   a FUNCTION_DECL.  The more natural way to do this is to put a field
   in the struct function, but we want to record this info at a time
   when the struct function has not been allocated yet.  A hash table
   isn't a great way to do this; maybe I'll think of something better.  */

static htab_t func_cl_pf_opts_mapping_hash_table;

struct func_cl_pf_opts_mapping
{
  tree func;
  /* The following pointer might or might not point to malloc'd storage.
     Don't free it. */
  struct cl_perfunc_opts *cl_pf_opts;
};

static hashval_t
func_cl_pf_opts_mapping_hash (const void* entry)
{
  const struct func_cl_pf_opts_mapping *e = entry;
  return htab_hash_pointer (e->func);
}

static int
func_cl_pf_opts_mapping_eq (const void *p, const void *q)
{
  const struct func_cl_pf_opts_mapping *pp = p;
  const struct func_cl_pf_opts_mapping *qq = q;
  return pp->func == qq->func;
}

void 
record_func_cl_pf_opts_mapping (tree func)
{
  PTR *slot;
  struct func_cl_pf_opts_mapping map, *entry;
  if (!func_cl_pf_opts_mapping_hash_table)
    func_cl_pf_opts_mapping_hash_table = htab_create (101, 
	func_cl_pf_opts_mapping_hash, func_cl_pf_opts_mapping_eq, 0);
  map.func = func;
  slot = htab_find_slot (func_cl_pf_opts_mapping_hash_table, &map, INSERT);
  if (*slot)
    entry = *slot;
  else
    {
      entry = xmalloc (sizeof (struct func_cl_pf_opts_mapping));
      entry->func = func;
      *slot = entry;
    }
  entry->cl_pf_opts = make_perfunc_opts ();
}

void 
restore_func_cl_pf_opts_mapping (tree func)
{
  PTR *slot;
  struct func_cl_pf_opts_mapping map, *entry;
  /* This will be the case for languages whose FEs don't call
     record_func_cl_pf_opts_mapping.  */
  if (!func_cl_pf_opts_mapping_hash_table)
    return;
  map.func = func;
  slot = htab_find_slot (func_cl_pf_opts_mapping_hash_table, &map, INSERT);
  if (*slot)
    entry = *slot;
  else
    {
      /* This means we did not call record_func_cl_opts_pf_mapping earlier.
	 Currently this happens for functions defined inside a C++ class;
	 we just record a token stream for those, which doesn't include
	 pragmas in a usable fashion.  For now just use the command line
	 options for these.  */
      entry = xmalloc (sizeof (struct func_cl_pf_opts_mapping));
      entry->func = func;
      entry->cl_pf_opts = &cl_pf_opts_cooked;
      *slot = entry;
    }
  cl_pf_opts = *(entry->cl_pf_opts);
  /* APPLE LOCAL begin 4760857 optimization pragmas */
  /* The variables set here are dependent on the per-func flags,
     but do not have corresponding command line options, so can't
     be saved and restored themselves in the current mechanism.
     So just (re)compute them. */
  align_loops_log = floor_log2 (align_loops * 2 - 1);
  align_jumps_log = floor_log2 (align_jumps * 2 - 1);
  align_labels_log = floor_log2 (align_labels * 2 - 1);
  if (align_labels_max_skip > align_labels || !align_labels)
    align_labels_max_skip = align_labels - 1;
  /* APPLE LOCAL end 4760857 optimization pragmas */
}

void
copy_func_cl_pf_opts_mapping (tree funcold, tree funcnew)
{
  PTR *slot;
  struct func_cl_pf_opts_mapping map, *entry;
  struct cl_perfunc_opts *oldcl_pf_opts;
  /* This will be the case for languages whose FEs don't call
     record_func_cl_pf_opts_mapping.  */
  if (!func_cl_pf_opts_mapping_hash_table)
    return;
  map.func = funcold;
  slot = htab_find_slot (func_cl_pf_opts_mapping_hash_table, &map, NO_INSERT);
  gcc_assert (*slot);
  entry = *slot;
  oldcl_pf_opts = entry->cl_pf_opts;

  map.func = funcnew;
  slot = htab_find_slot (func_cl_pf_opts_mapping_hash_table, &map, INSERT);
  if (*slot)
    entry = *slot;
  else
    {
      entry = xmalloc (sizeof (struct func_cl_pf_opts_mapping));
      entry->func = funcnew;
      *slot = entry;
    }
  entry->cl_pf_opts = oldcl_pf_opts;
}
/* APPLE LOCAL end optimization pragmas 3124235/3420242 */

/* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
   a simple on-off switch.  */

int
option_enabled (int opt_idx)
{
  const struct cl_option *option = &(cl_options[opt_idx]);
/* APPLE LOCAL begin optimization pragmas 3124235/3420242 */
  if (option->access_flag)
    {
      switch (option->var_type)
	{
	case CLVC_BOOLEAN:
	  return option->access_flag (0, 0) != 0;

	case CLVC_EQUAL:
	  return option->access_flag (0, 0) == option->var_value;

	case CLVC_BIT_CLEAR:
	case CLVC_BIT_SET:
	case CLVC_STRING:
	  break;
	}
    }
  else if (option->flag_var)
/* APPLE LOCAL end optimization pragmas 3124235/3420242 */
    switch (option->var_type)
      {
      case CLVC_BOOLEAN:
	return *(int *) option->flag_var != 0;

      case CLVC_EQUAL:
	return *(int *) option->flag_var == option->var_value;

      case CLVC_BIT_CLEAR:
	return (*(int *) option->flag_var & option->var_value) == 0;

      case CLVC_BIT_SET:
	return (*(int *) option->flag_var & option->var_value) != 0;

      case CLVC_STRING:
	break;
      }
  return -1;
}

/* Fill STATE with the current state of option OPTION.  Return true if
   there is some state to store.  */

bool
get_option_state (int option, struct cl_option_state *state)
{
  if (cl_options[option].flag_var == 0)
    return false;

  switch (cl_options[option].var_type)
    {
    case CLVC_BOOLEAN:
    case CLVC_EQUAL:
      state->data = cl_options[option].flag_var;
      state->size = sizeof (int);
      break;

    case CLVC_BIT_CLEAR:
    case CLVC_BIT_SET:
      state->ch = option_enabled (option);
      state->data = &state->ch;
      state->size = 1;
      break;

    case CLVC_STRING:
      state->data = *(const char **) cl_options[option].flag_var;
      if (state->data == 0)
	state->data = "";
      state->size = strlen (state->data) + 1;
      break;
    }
  return true;
}