path: root/gcc/config/i386/i386-options.c

/* Copyright (C) 1988-2022 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/>.  */

#define IN_TARGET_CODE 1

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "rtl.h"
#include "tree.h"
#include "memmodel.h"
#include "gimple.h"
#include "cfghooks.h"
#include "cfgloop.h"
#include "df.h"
#include "tm_p.h"
#include "stringpool.h"
#include "expmed.h"
#include "optabs.h"
#include "regs.h"
#include "emit-rtl.h"
#include "recog.h"
#include "cgraph.h"
#include "diagnostic.h"
#include "cfgbuild.h"
#include "alias.h"
#include "fold-const.h"
#include "attribs.h"
#include "calls.h"
#include "stor-layout.h"
#include "varasm.h"
#include "output.h"
#include "insn-attr.h"
#include "flags.h"
#include "except.h"
#include "explow.h"
#include "expr.h"
#include "cfgrtl.h"
#include "common/common-target.h"
#include "langhooks.h"
#include "reload.h"
#include "gimplify.h"
#include "dwarf2.h"
#include "tm-constrs.h"
#include "cselib.h"
#include "sched-int.h"
#include "opts.h"
#include "tree-pass.h"
#include "context.h"
#include "pass_manager.h"
#include "target-globals.h"
#include "gimple-iterator.h"
#include "tree-vectorizer.h"
#include "shrink-wrap.h"
#include "builtins.h"
#include "rtl-iter.h"
#include "tree-iterator.h"
#include "dbgcnt.h"
#include "case-cfn-macros.h"
#include "dojump.h"
#include "fold-const-call.h"
#include "tree-vrp.h"
#include "tree-ssanames.h"
#include "selftest.h"
#include "selftest-rtl.h"
#include "print-rtl.h"
#include "intl.h"
#include "ifcvt.h"
#include "symbol-summary.h"
#include "ipa-prop.h"
#include "ipa-fnsummary.h"
#include "wide-int-bitmask.h"
#include "tree-vector-builder.h"
#include "debug.h"
#include "dwarf2out.h"
#include "i386-options.h"

#include "x86-tune-costs.h"

#ifndef SUBTARGET32_DEFAULT_CPU
#define SUBTARGET32_DEFAULT_CPU "i386"
#endif

/* Processor feature/optimization bitmasks.  */
#define m_NONE HOST_WIDE_INT_0U
#define m_ALL (~HOST_WIDE_INT_0U)
#define m_386 (HOST_WIDE_INT_1U<<PROCESSOR_I386)
#define m_486 (HOST_WIDE_INT_1U<<PROCESSOR_I486)
#define m_PENT (HOST_WIDE_INT_1U<<PROCESSOR_PENTIUM)
#define m_LAKEMONT (HOST_WIDE_INT_1U<<PROCESSOR_LAKEMONT)
#define m_PPRO (HOST_WIDE_INT_1U<<PROCESSOR_PENTIUMPRO)
#define m_PENT4 (HOST_WIDE_INT_1U<<PROCESSOR_PENTIUM4)
#define m_NOCONA (HOST_WIDE_INT_1U<<PROCESSOR_NOCONA)
#define m_P4_NOCONA (m_PENT4 | m_NOCONA)
#define m_CORE2 (HOST_WIDE_INT_1U<<PROCESSOR_CORE2)
#define m_NEHALEM (HOST_WIDE_INT_1U<<PROCESSOR_NEHALEM)
#define m_SANDYBRIDGE (HOST_WIDE_INT_1U<<PROCESSOR_SANDYBRIDGE)
#define m_HASWELL (HOST_WIDE_INT_1U<<PROCESSOR_HASWELL)
#define m_BONNELL (HOST_WIDE_INT_1U<<PROCESSOR_BONNELL)
#define m_SILVERMONT (HOST_WIDE_INT_1U<<PROCESSOR_SILVERMONT)
#define m_KNL (HOST_WIDE_INT_1U<<PROCESSOR_KNL)
#define m_KNM (HOST_WIDE_INT_1U<<PROCESSOR_KNM)
#define m_SKYLAKE (HOST_WIDE_INT_1U<<PROCESSOR_SKYLAKE)
#define m_SKYLAKE_AVX512 (HOST_WIDE_INT_1U<<PROCESSOR_SKYLAKE_AVX512)
#define m_CANNONLAKE (HOST_WIDE_INT_1U<<PROCESSOR_CANNONLAKE)
#define m_ICELAKE_CLIENT (HOST_WIDE_INT_1U<<PROCESSOR_ICELAKE_CLIENT)
#define m_ICELAKE_SERVER (HOST_WIDE_INT_1U<<PROCESSOR_ICELAKE_SERVER)
#define m_CASCADELAKE (HOST_WIDE_INT_1U<<PROCESSOR_CASCADELAKE)
#define m_TIGERLAKE (HOST_WIDE_INT_1U<<PROCESSOR_TIGERLAKE)
#define m_COOPERLAKE (HOST_WIDE_INT_1U<<PROCESSOR_COOPERLAKE)
#define m_SAPPHIRERAPIDS (HOST_WIDE_INT_1U<<PROCESSOR_SAPPHIRERAPIDS)
#define m_ALDERLAKE (HOST_WIDE_INT_1U<<PROCESSOR_ALDERLAKE)
#define m_ROCKETLAKE (HOST_WIDE_INT_1U<<PROCESSOR_ROCKETLAKE)
#define m_CORE_AVX512 (m_SKYLAKE_AVX512 | m_CANNONLAKE \
		       | m_ICELAKE_CLIENT | m_ICELAKE_SERVER | m_CASCADELAKE \
		       | m_TIGERLAKE | m_COOPERLAKE | m_SAPPHIRERAPIDS \
		       | m_ROCKETLAKE)
#define m_CORE_AVX2 (m_HASWELL | m_SKYLAKE | m_CORE_AVX512)
#define m_CORE_ALL (m_CORE2 | m_NEHALEM  | m_SANDYBRIDGE | m_CORE_AVX2)
#define m_GOLDMONT (HOST_WIDE_INT_1U<<PROCESSOR_GOLDMONT)
#define m_GOLDMONT_PLUS (HOST_WIDE_INT_1U<<PROCESSOR_GOLDMONT_PLUS)
#define m_TREMONT (HOST_WIDE_INT_1U<<PROCESSOR_TREMONT)
#define m_INTEL (HOST_WIDE_INT_1U<<PROCESSOR_INTEL)

#define m_GEODE (HOST_WIDE_INT_1U<<PROCESSOR_GEODE)
#define m_K6 (HOST_WIDE_INT_1U<<PROCESSOR_K6)
#define m_K6_GEODE (m_K6 | m_GEODE)
#define m_K8 (HOST_WIDE_INT_1U<<PROCESSOR_K8)
#define m_ATHLON (HOST_WIDE_INT_1U<<PROCESSOR_ATHLON)
#define m_ATHLON_K8 (m_K8 | m_ATHLON)
#define m_AMDFAM10 (HOST_WIDE_INT_1U<<PROCESSOR_AMDFAM10)
#define m_BDVER1 (HOST_WIDE_INT_1U<<PROCESSOR_BDVER1)
#define m_BDVER2 (HOST_WIDE_INT_1U<<PROCESSOR_BDVER2)
#define m_BDVER3 (HOST_WIDE_INT_1U<<PROCESSOR_BDVER3)
#define m_BDVER4 (HOST_WIDE_INT_1U<<PROCESSOR_BDVER4)
#define m_ZNVER1 (HOST_WIDE_INT_1U<<PROCESSOR_ZNVER1)
#define m_ZNVER2 (HOST_WIDE_INT_1U<<PROCESSOR_ZNVER2)
#define m_ZNVER3 (HOST_WIDE_INT_1U<<PROCESSOR_ZNVER3)
#define m_BTVER1 (HOST_WIDE_INT_1U<<PROCESSOR_BTVER1)
#define m_BTVER2 (HOST_WIDE_INT_1U<<PROCESSOR_BTVER2)
#define m_BDVER	(m_BDVER1 | m_BDVER2 | m_BDVER3 | m_BDVER4)
#define m_BTVER (m_BTVER1 | m_BTVER2)
#define m_ZNVER	(m_ZNVER1 | m_ZNVER2 | m_ZNVER3)
#define m_AMD_MULTIPLE (m_ATHLON_K8 | m_AMDFAM10 | m_BDVER | m_BTVER \
			| m_ZNVER)

#define m_GENERIC (HOST_WIDE_INT_1U<<PROCESSOR_GENERIC)

const char* ix86_tune_feature_names[X86_TUNE_LAST] = {
#undef DEF_TUNE
#define DEF_TUNE(tune, name, selector) name,
#include "x86-tune.def"
#undef DEF_TUNE
};

/* Feature tests against the various tunings.  */
unsigned char ix86_tune_features[X86_TUNE_LAST];

/* Feature tests against the various tunings used to create ix86_tune_features
   based on the processor mask.  */
static unsigned HOST_WIDE_INT initial_ix86_tune_features[X86_TUNE_LAST] = {
#undef DEF_TUNE
#define DEF_TUNE(tune, name, selector) selector,
#include "x86-tune.def"
#undef DEF_TUNE
};

/* Feature tests against the various architecture variations.  */
unsigned char ix86_arch_features[X86_ARCH_LAST];

struct ix86_target_opts
{
  const char *option;		/* option string */
  HOST_WIDE_INT mask;		/* isa mask options */
};

/* This table is ordered so that options like -msse4.2 that imply other
   ISAs come first.  Target string will be displayed in the same order.  */
static struct ix86_target_opts isa2_opts[] =
{
  { "-mcx16",		OPTION_MASK_ISA2_CX16 },
  { "-mvaes",		OPTION_MASK_ISA2_VAES },
  { "-mrdpid",		OPTION_MASK_ISA2_RDPID },
  { "-mpconfig",	OPTION_MASK_ISA2_PCONFIG },
  { "-mwbnoinvd",	OPTION_MASK_ISA2_WBNOINVD },
  { "-mavx512vp2intersect", OPTION_MASK_ISA2_AVX512VP2INTERSECT },
  { "-msgx",		OPTION_MASK_ISA2_SGX },
  { "-mavx5124vnniw",	OPTION_MASK_ISA2_AVX5124VNNIW },
  { "-mavx5124fmaps",	OPTION_MASK_ISA2_AVX5124FMAPS },
  { "-mhle",		OPTION_MASK_ISA2_HLE },
  { "-mmovbe",		OPTION_MASK_ISA2_MOVBE },
  { "-mclzero",		OPTION_MASK_ISA2_CLZERO },
  { "-mmwaitx",		OPTION_MASK_ISA2_MWAITX },
  { "-mmwait",		OPTION_MASK_ISA2_MWAIT },
  { "-mmovdir64b",	OPTION_MASK_ISA2_MOVDIR64B },
  { "-mwaitpkg",	OPTION_MASK_ISA2_WAITPKG },
  { "-mcldemote",	OPTION_MASK_ISA2_CLDEMOTE },
  { "-mptwrite",	OPTION_MASK_ISA2_PTWRITE },
  { "-mavx512bf16",	OPTION_MASK_ISA2_AVX512BF16 },
  { "-menqcmd",		OPTION_MASK_ISA2_ENQCMD },
  { "-mserialize",	OPTION_MASK_ISA2_SERIALIZE },
  { "-mtsxldtrk",	OPTION_MASK_ISA2_TSXLDTRK },
  { "-mamx-tile",	OPTION_MASK_ISA2_AMX_TILE },
  { "-mamx-int8",	OPTION_MASK_ISA2_AMX_INT8 },
  { "-mamx-bf16",	OPTION_MASK_ISA2_AMX_BF16 },
  { "-muintr",		OPTION_MASK_ISA2_UINTR },
  { "-mhreset",		OPTION_MASK_ISA2_HRESET },
  { "-mkl",		OPTION_MASK_ISA2_KL },
  { "-mwidekl", 	OPTION_MASK_ISA2_WIDEKL },
  { "-mavxvnni",	OPTION_MASK_ISA2_AVXVNNI },
  { "-mavx512fp16",	OPTION_MASK_ISA2_AVX512FP16 }
};
static struct ix86_target_opts isa_opts[] =
{
  { "-mavx512vpopcntdq", OPTION_MASK_ISA_AVX512VPOPCNTDQ },
  { "-mavx512bitalg",	OPTION_MASK_ISA_AVX512BITALG },
  { "-mvpclmulqdq",	OPTION_MASK_ISA_VPCLMULQDQ },
  { "-mgfni",		OPTION_MASK_ISA_GFNI },
  { "-mavx512vnni",	OPTION_MASK_ISA_AVX512VNNI },
  { "-mavx512vbmi2",	OPTION_MASK_ISA_AVX512VBMI2 },
  { "-mavx512vbmi",	OPTION_MASK_ISA_AVX512VBMI },
  { "-mavx512ifma",	OPTION_MASK_ISA_AVX512IFMA },
  { "-mavx512vl",	OPTION_MASK_ISA_AVX512VL },
  { "-mavx512bw",	OPTION_MASK_ISA_AVX512BW },
  { "-mavx512dq",	OPTION_MASK_ISA_AVX512DQ },
  { "-mavx512er",	OPTION_MASK_ISA_AVX512ER },
  { "-mavx512pf",	OPTION_MASK_ISA_AVX512PF },
  { "-mavx512cd",	OPTION_MASK_ISA_AVX512CD },
  { "-mavx512f",	OPTION_MASK_ISA_AVX512F },
  { "-mavx2",		OPTION_MASK_ISA_AVX2 },
  { "-mfma",		OPTION_MASK_ISA_FMA },
  { "-mxop",		OPTION_MASK_ISA_XOP },
  { "-mfma4",		OPTION_MASK_ISA_FMA4 },
  { "-mf16c",		OPTION_MASK_ISA_F16C },
  { "-mavx",		OPTION_MASK_ISA_AVX },
/*{ "-msse4"		OPTION_MASK_ISA_SSE4 }, */
  { "-msse4.2",		OPTION_MASK_ISA_SSE4_2 },
  { "-msse4.1",		OPTION_MASK_ISA_SSE4_1 },
  { "-msse4a",		OPTION_MASK_ISA_SSE4A },
  { "-mssse3",		OPTION_MASK_ISA_SSSE3 },
  { "-msse3",		OPTION_MASK_ISA_SSE3 },
  { "-maes",		OPTION_MASK_ISA_AES },
  { "-msha",		OPTION_MASK_ISA_SHA },
  { "-mpclmul",		OPTION_MASK_ISA_PCLMUL },
  { "-msse2",		OPTION_MASK_ISA_SSE2 },
  { "-msse",		OPTION_MASK_ISA_SSE },
  { "-m3dnowa",		OPTION_MASK_ISA_3DNOW_A },
  { "-m3dnow",		OPTION_MASK_ISA_3DNOW },
  { "-mmmx",		OPTION_MASK_ISA_MMX },
  { "-mrtm",		OPTION_MASK_ISA_RTM },
  { "-mprfchw",		OPTION_MASK_ISA_PRFCHW },
  { "-mrdseed",		OPTION_MASK_ISA_RDSEED },
  { "-madx",		OPTION_MASK_ISA_ADX },
  { "-mprefetchwt1",	OPTION_MASK_ISA_PREFETCHWT1 },
  { "-mclflushopt",	OPTION_MASK_ISA_CLFLUSHOPT },
  { "-mxsaves",		OPTION_MASK_ISA_XSAVES },
  { "-mxsavec",		OPTION_MASK_ISA_XSAVEC },
  { "-mxsaveopt",	OPTION_MASK_ISA_XSAVEOPT },
  { "-mxsave",		OPTION_MASK_ISA_XSAVE },
  { "-mabm",		OPTION_MASK_ISA_ABM },
  { "-mbmi",		OPTION_MASK_ISA_BMI },
  { "-mbmi2",		OPTION_MASK_ISA_BMI2 },
  { "-mlzcnt",		OPTION_MASK_ISA_LZCNT },
  { "-mtbm",		OPTION_MASK_ISA_TBM },
  { "-mpopcnt",		OPTION_MASK_ISA_POPCNT },
  { "-msahf",		OPTION_MASK_ISA_SAHF },
  { "-mcrc32",		OPTION_MASK_ISA_CRC32 },
  { "-mfsgsbase",	OPTION_MASK_ISA_FSGSBASE },
  { "-mrdrnd",		OPTION_MASK_ISA_RDRND },
  { "-mpku",		OPTION_MASK_ISA_PKU },
  { "-mlwp",		OPTION_MASK_ISA_LWP },
  { "-mfxsr",		OPTION_MASK_ISA_FXSR },
  { "-mclwb",		OPTION_MASK_ISA_CLWB },
  { "-mshstk",		OPTION_MASK_ISA_SHSTK },
  { "-mmovdiri",	OPTION_MASK_ISA_MOVDIRI }
};

/* Return 1 if TRAIT NAME is present in the OpenMP context's
   device trait set, return 0 if not present in any OpenMP context in the
   whole translation unit, or -1 if not present in the current OpenMP context
   but might be present in another OpenMP context in the same TU.  */

int
ix86_omp_device_kind_arch_isa (enum omp_device_kind_arch_isa trait,
			       const char *name)
{
  switch (trait)
    {
    case omp_device_kind:
      return strcmp (name, "cpu") == 0;
    case omp_device_arch:
#ifdef ACCEL_COMPILER
      if (strcmp (name, "intel_mic") == 0)
	return 1;
#endif
      if (strcmp (name, "x86") == 0)
	return 1;
      if (TARGET_64BIT)
	{
	  if (TARGET_X32)
	    return strcmp (name, "x32") == 0;
	  else
	    return strcmp (name, "x86_64") == 0;
	}
      if (strcmp (name, "ia32") == 0 || strcmp (name, "i386") == 0)
	return 1;
      if (strcmp (name, "i486") == 0)
	return ix86_arch != PROCESSOR_I386 ? 1 : -1;
      if (strcmp (name, "i586") == 0)
	return (ix86_arch != PROCESSOR_I386
		&& ix86_arch != PROCESSOR_I486) ? 1 : -1;
      if (strcmp (name, "i686") == 0)
	return (ix86_arch != PROCESSOR_I386
		&& ix86_arch != PROCESSOR_I486
		&& ix86_arch != PROCESSOR_LAKEMONT
		&& ix86_arch != PROCESSOR_PENTIUM) ? 1 : -1;
      return 0;
    case omp_device_isa:
      for (int i = 0; i < 2; i++)
	{
	  struct ix86_target_opts *opts = i ? isa2_opts : isa_opts;
	  size_t nopts = i ? ARRAY_SIZE (isa2_opts) : ARRAY_SIZE (isa_opts);
	  HOST_WIDE_INT mask = i ? ix86_isa_flags2 : ix86_isa_flags;
	  for (size_t n = 0; n < nopts; n++)
	    {
	      /* Handle sse4 as an alias to sse4.2.  */
	      if (opts[n].mask == OPTION_MASK_ISA_SSE4_2)
		{
		  if (strcmp (name, "sse4") == 0)
		    return (mask & opts[n].mask) != 0 ? 1 : -1;
		}
	      if (strcmp (name, opts[n].option + 2) == 0)
		return (mask & opts[n].mask) != 0 ? 1 : -1;
	    }
	}
      return 0;
    default:
      gcc_unreachable ();
    }
}

/* Return a string that documents the current -m options.  The caller is
   responsible for freeing the string.  */

char *
ix86_target_string (HOST_WIDE_INT isa, HOST_WIDE_INT isa2,
		    int flags, int flags2,
		    const char *arch, const char *tune,
		    enum fpmath_unit fpmath,
		    enum prefer_vector_width pvw,
		    enum prefer_vector_width move_max,
		    enum prefer_vector_width store_max,
		    bool add_nl_p, bool add_abi_p)
{
  /* Flag options.  */
  static struct ix86_target_opts flag_opts[] =
  {
    { "-m128bit-long-double",		MASK_128BIT_LONG_DOUBLE },
    { "-mlong-double-128",		MASK_LONG_DOUBLE_128 },
    { "-mlong-double-64",		MASK_LONG_DOUBLE_64 },
    { "-m80387",			MASK_80387 },
    { "-maccumulate-outgoing-args",	MASK_ACCUMULATE_OUTGOING_ARGS },
    { "-malign-double",			MASK_ALIGN_DOUBLE },
    { "-mcld",				MASK_CLD },
    { "-mfp-ret-in-387",		MASK_FLOAT_RETURNS },
    { "-mieee-fp",			MASK_IEEE_FP },
    { "-minline-all-stringops",		MASK_INLINE_ALL_STRINGOPS },
    { "-minline-stringops-dynamically",	MASK_INLINE_STRINGOPS_DYNAMICALLY },
    { "-mms-bitfields",			MASK_MS_BITFIELD_LAYOUT },
    { "-mno-align-stringops",		MASK_NO_ALIGN_STRINGOPS },
    { "-mno-fancy-math-387",		MASK_NO_FANCY_MATH_387 },
    { "-mno-push-args",			MASK_NO_PUSH_ARGS },
    { "-mno-red-zone",			MASK_NO_RED_ZONE },
    { "-momit-leaf-frame-pointer",	MASK_OMIT_LEAF_FRAME_POINTER },
    { "-mrecip",			MASK_RECIP },
    { "-mrtd",				MASK_RTD },
    { "-msseregparm",			MASK_SSEREGPARM },
    { "-mstack-arg-probe",		MASK_STACK_PROBE },
    { "-mtls-direct-seg-refs",		MASK_TLS_DIRECT_SEG_REFS },
    { "-mvect8-ret-in-mem",		MASK_VECT8_RETURNS },
    { "-m8bit-idiv",			MASK_USE_8BIT_IDIV },
    { "-mvzeroupper",			MASK_VZEROUPPER },
    { "-mstv",				MASK_STV },
    { "-mavx256-split-unaligned-load",	MASK_AVX256_SPLIT_UNALIGNED_LOAD },
    { "-mavx256-split-unaligned-store",	MASK_AVX256_SPLIT_UNALIGNED_STORE },
    { "-mcall-ms2sysv-xlogues",		MASK_CALL_MS2SYSV_XLOGUES },
    { "-mrelax-cmpxchg-loop",		MASK_RELAX_CMPXCHG_LOOP }
  };

  /* Additional flag options.  */
  static struct ix86_target_opts flag2_opts[] =
  {
    { "-mgeneral-regs-only",		OPTION_MASK_GENERAL_REGS_ONLY }
  };

  const char *opts[ARRAY_SIZE (isa_opts) + ARRAY_SIZE (isa2_opts)
		   + ARRAY_SIZE (flag_opts) + ARRAY_SIZE (flag2_opts) + 6][2];

  char isa_other[40];
  char isa2_other[40];
  char flags_other[40];
  char flags2_other[40];
  unsigned num = 0;
  unsigned i, j;
  char *ret;
  char *ptr;
  size_t len;
  size_t line_len;
  size_t sep_len;
  const char *abi;

  memset (opts, '\0', sizeof (opts));

  /* Add -march= option.  */
  if (arch)
    {
      opts[num][0] = "-march=";
      opts[num++][1] = arch;
    }

  /* Add -mtune= option.  */
  if (tune)
    {
      opts[num][0] = "-mtune=";
      opts[num++][1] = tune;
    }

  /* Add -m32/-m64/-mx32.  */
  if (add_abi_p)
    {
      if ((isa & OPTION_MASK_ISA_64BIT) != 0)
	{
	  if ((isa & OPTION_MASK_ABI_64) != 0)
	    abi = "-m64";
	  else
	    abi = "-mx32";
	}
      else
	abi = "-m32";
      opts[num++][0] = abi;
    }
  isa &= ~(OPTION_MASK_ISA_64BIT | OPTION_MASK_ABI_64 | OPTION_MASK_ABI_X32);

  /* Pick out the options in isa2 options.  */
  for (i = 0; i < ARRAY_SIZE (isa2_opts); i++)
    {
      if ((isa2 & isa2_opts[i].mask) != 0)
	{
	  opts[num++][0] = isa2_opts[i].option;
	  isa2 &= ~ isa2_opts[i].mask;
	}
    }

  if (isa2 && add_nl_p)
    {
      opts[num++][0] = isa2_other;
      sprintf (isa2_other, "(other isa2: %#" HOST_WIDE_INT_PRINT "x)", isa2);
    }

  /* Pick out the options in isa options.  */
  for (i = 0; i < ARRAY_SIZE (isa_opts); i++)
    {
      if ((isa & isa_opts[i].mask) != 0)
	{
	  opts[num++][0] = isa_opts[i].option;
	  isa &= ~ isa_opts[i].mask;
	}
    }

  if (isa && add_nl_p)
    {
      opts[num++][0] = isa_other;
      sprintf (isa_other, "(other isa: %#" HOST_WIDE_INT_PRINT "x)", isa);
    }

  /* Add flag options.  */
  for (i = 0; i < ARRAY_SIZE (flag_opts); i++)
    {
      if ((flags & flag_opts[i].mask) != 0)
	{
	  opts[num++][0] = flag_opts[i].option;
	  flags &= ~ flag_opts[i].mask;
	}
    }

  if (flags && add_nl_p)
    {
      opts[num++][0] = flags_other;
      sprintf (flags_other, "(other flags: %#x)", flags);
    }

    /* Add additional flag options.  */
  for (i = 0; i < ARRAY_SIZE (flag2_opts); i++)
    {
      if ((flags2 & flag2_opts[i].mask) != 0)
	{
	  opts[num++][0] = flag2_opts[i].option;
	  flags2 &= ~ flag2_opts[i].mask;
	}
    }

  if (flags2 && add_nl_p)
    {
      opts[num++][0] = flags2_other;
      sprintf (flags2_other, "(other flags2: %#x)", flags2);
    }

  /* Add -mfpmath= option.  */
  if (fpmath)
    {
      opts[num][0] = "-mfpmath=";
      switch ((int) fpmath)
	{
	case FPMATH_387:
	  opts[num++][1] = "387";
	  break;

	case FPMATH_SSE:
	  opts[num++][1] = "sse";
	  break;

	case FPMATH_387 | FPMATH_SSE:
	  opts[num++][1] = "sse+387";
	  break;

	default:
	  gcc_unreachable ();
	}
    }

  auto add_vector_width = [&opts, &num] (prefer_vector_width pvw,
					 const char *cmd)
    {
      opts[num][0] = cmd;
      switch ((int) pvw)
	{
	case PVW_AVX128:
	  opts[num++][1] = "128";
	  break;

	case PVW_AVX256:
	  opts[num++][1] = "256";
	  break;

	case PVW_AVX512:
	  opts[num++][1] = "512";
	  break;

	default:
	  gcc_unreachable ();
	}
    };

  /* Add -mprefer-vector-width= option.  */
  if (pvw)
    add_vector_width (pvw, "-mprefer-vector-width=");

  /* Add -mmove-max= option.  */
  if (move_max)
    add_vector_width (move_max, "-mmove-max=");

  /* Add -mstore-max= option.  */
  if (store_max)
    add_vector_width (store_max, "-mstore-max=");

  /* Any options?  */
  if (num == 0)
    return NULL;

  gcc_assert (num < ARRAY_SIZE (opts));

  /* Size the string.  */
  len = 0;
  sep_len = (add_nl_p) ? 3 : 1;
  for (i = 0; i < num; i++)
    {
      len += sep_len;
      for (j = 0; j < 2; j++)
	if (opts[i][j])
	  len += strlen (opts[i][j]);
    }

  /* Build the string.  */
  ret = ptr = (char *) xmalloc (len);
  line_len = 0;

  for (i = 0; i < num; i++)
    {
      size_t len2[2];

      for (j = 0; j < 2; j++)
	len2[j] = (opts[i][j]) ? strlen (opts[i][j]) : 0;

      if (i != 0)
	{
	  *ptr++ = ' ';
	  line_len++;

	  if (add_nl_p && line_len + len2[0] + len2[1] > 70)
	    {
	      *ptr++ = '\\';
	      *ptr++ = '\n';
	      line_len = 0;
	    }
	}

      for (j = 0; j < 2; j++)
	if (opts[i][j])
	  {
	    memcpy (ptr, opts[i][j], len2[j]);
	    ptr += len2[j];
	    line_len += len2[j];
	  }
    }

  *ptr = '\0';
  gcc_assert (ret + len >= ptr);

  return ret;
}

/* Function that is callable from the debugger to print the current
   options.  */
void ATTRIBUTE_UNUSED
ix86_debug_options (void)
{
  char *opts = ix86_target_string (ix86_isa_flags, ix86_isa_flags2,
				   target_flags, ix86_target_flags,
				   ix86_arch_string, ix86_tune_string,
				   ix86_fpmath, prefer_vector_width_type,
				   ix86_move_max, ix86_store_max,
				   true, true);

  if (opts)
    {
      fprintf (stderr, "%s\n\n", opts);
      free (opts);
    }
  else
    fputs ("<no options>\n\n", stderr);

  return;
}

/* Save the current options */

void
ix86_function_specific_save (struct cl_target_option *ptr,
			     struct gcc_options *opts,
			     struct gcc_options */* opts_set */)
{
  ptr->arch = ix86_arch;
  ptr->schedule = ix86_schedule;
  ptr->prefetch_sse = ix86_prefetch_sse;
  ptr->tune = ix86_tune;
  ptr->branch_cost = ix86_branch_cost;
  ptr->tune_defaulted = ix86_tune_defaulted;
  ptr->arch_specified = ix86_arch_specified;
  ptr->x_ix86_isa_flags_explicit = opts->x_ix86_isa_flags_explicit;
  ptr->x_ix86_isa_flags2_explicit = opts->x_ix86_isa_flags2_explicit;
  ptr->x_recip_mask_explicit = opts->x_recip_mask_explicit;
  ptr->x_ix86_arch_string = opts->x_ix86_arch_string;
  ptr->x_ix86_tune_string = opts->x_ix86_tune_string;
  ptr->x_ix86_abi = opts->x_ix86_abi;
  ptr->x_ix86_asm_dialect = opts->x_ix86_asm_dialect;
  ptr->x_ix86_branch_cost = opts->x_ix86_branch_cost;
  ptr->x_ix86_dump_tunes = opts->x_ix86_dump_tunes;
  ptr->x_ix86_force_align_arg_pointer = opts->x_ix86_force_align_arg_pointer;
  ptr->x_ix86_force_drap = opts->x_ix86_force_drap;
  ptr->x_ix86_recip_name = opts->x_ix86_recip_name;
  ptr->x_ix86_section_threshold = opts->x_ix86_section_threshold;
  ptr->x_ix86_sse2avx = opts->x_ix86_sse2avx;
  ptr->x_ix86_stack_protector_guard = opts->x_ix86_stack_protector_guard;
  ptr->x_ix86_stringop_alg = opts->x_ix86_stringop_alg;
  ptr->x_ix86_tls_dialect = opts->x_ix86_tls_dialect;
  ptr->x_ix86_tune_ctrl_string = opts->x_ix86_tune_ctrl_string;
  ptr->x_ix86_tune_memcpy_strategy = opts->x_ix86_tune_memcpy_strategy;
  ptr->x_ix86_tune_memset_strategy = opts->x_ix86_tune_memset_strategy;
  ptr->x_ix86_tune_no_default = opts->x_ix86_tune_no_default;

  /* The fields are char but the variables are not; make sure the
     values fit in the fields.  */
  gcc_assert (ptr->arch == ix86_arch);
  gcc_assert (ptr->schedule == ix86_schedule);
  gcc_assert (ptr->tune == ix86_tune);
  gcc_assert (ptr->branch_cost == ix86_branch_cost);
}

/* Feature tests against the various architecture variations, used to create
   ix86_arch_features based on the processor mask.  */
static unsigned HOST_WIDE_INT initial_ix86_arch_features[X86_ARCH_LAST] = {
  /* X86_ARCH_CMOV: Conditional move was added for pentiumpro.  */
  ~(m_386 | m_486 | m_PENT | m_LAKEMONT | m_K6),

  /* X86_ARCH_CMPXCHG: Compare and exchange was added for 80486.  */
  ~m_386,

  /* X86_ARCH_CMPXCHG8B: Compare and exchange 8 bytes was added for pentium. */
  ~(m_386 | m_486),

  /* X86_ARCH_XADD: Exchange and add was added for 80486.  */
  ~m_386,

  /* X86_ARCH_BSWAP: Byteswap was added for 80486.  */
  ~m_386,
};

/* This table must be in sync with enum processor_type in i386.h.  */ 
static const struct processor_costs *processor_cost_table[] =
{
  &generic_cost,
  &i386_cost,
  &i486_cost,
  &pentium_cost,
  &lakemont_cost,
  &pentiumpro_cost,
  &pentium4_cost,
  &nocona_cost,
  &core_cost,
  &core_cost,
  &core_cost,
  &core_cost,
  &atom_cost,
  &slm_cost,
  &slm_cost,
  &slm_cost,
  &tremont_cost,
  &slm_cost,
  &slm_cost,
  &skylake_cost,
  &skylake_cost,
  &icelake_cost,
  &icelake_cost,
  &icelake_cost,
  &skylake_cost,
  &icelake_cost,
  &skylake_cost,
  &icelake_cost,
  &alderlake_cost,
  &icelake_cost,
  &intel_cost,
  &geode_cost,
  &k6_cost,
  &athlon_cost,
  &k8_cost,
  &amdfam10_cost,
  &bdver_cost,
  &bdver_cost,
  &bdver_cost,
  &bdver_cost,
  &btver1_cost,
  &btver2_cost,
  &znver1_cost,
  &znver2_cost,
  &znver3_cost
};

/* Guarantee that the array is aligned with enum processor_type.  */
STATIC_ASSERT (ARRAY_SIZE (processor_cost_table) == PROCESSOR_max);

static bool
ix86_option_override_internal (bool main_args_p,
			       struct gcc_options *opts,
			       struct gcc_options *opts_set);
static void
set_ix86_tune_features (struct gcc_options *opts,
			enum processor_type ix86_tune, bool dump);

/* Restore the current options */

void
ix86_function_specific_restore (struct gcc_options *opts,
				struct gcc_options */* opts_set */,
				struct cl_target_option *ptr)
{
  enum processor_type old_tune = ix86_tune;
  enum processor_type old_arch = ix86_arch;
  unsigned HOST_WIDE_INT ix86_arch_mask;
  int i;

  /* We don't change -fPIC.  */
  opts->x_flag_pic = flag_pic;

  ix86_arch = (enum processor_type) ptr->arch;
  ix86_schedule = (enum attr_cpu) ptr->schedule;
  ix86_tune = (enum processor_type) ptr->tune;
  ix86_prefetch_sse = ptr->prefetch_sse;
  ix86_tune_defaulted = ptr->tune_defaulted;
  ix86_arch_specified = ptr->arch_specified;
  opts->x_ix86_isa_flags_explicit = ptr->x_ix86_isa_flags_explicit;
  opts->x_ix86_isa_flags2_explicit = ptr->x_ix86_isa_flags2_explicit;
  opts->x_recip_mask_explicit = ptr->x_recip_mask_explicit;
  opts->x_ix86_arch_string = ptr->x_ix86_arch_string;
  opts->x_ix86_tune_string = ptr->x_ix86_tune_string;
  opts->x_ix86_abi = ptr->x_ix86_abi;
  opts->x_ix86_asm_dialect = ptr->x_ix86_asm_dialect;
  opts->x_ix86_branch_cost = ptr->x_ix86_branch_cost;
  opts->x_ix86_dump_tunes = ptr->x_ix86_dump_tunes;
  opts->x_ix86_force_align_arg_pointer = ptr->x_ix86_force_align_arg_pointer;
  opts->x_ix86_force_drap = ptr->x_ix86_force_drap;
  opts->x_ix86_recip_name = ptr->x_ix86_recip_name;
  opts->x_ix86_section_threshold = ptr->x_ix86_section_threshold;
  opts->x_ix86_sse2avx = ptr->x_ix86_sse2avx;
  opts->x_ix86_stack_protector_guard = ptr->x_ix86_stack_protector_guard;
  opts->x_ix86_stringop_alg = ptr->x_ix86_stringop_alg;
  opts->x_ix86_tls_dialect = ptr->x_ix86_tls_dialect;
  opts->x_ix86_tune_ctrl_string = ptr->x_ix86_tune_ctrl_string;
  opts->x_ix86_tune_memcpy_strategy = ptr->x_ix86_tune_memcpy_strategy;
  opts->x_ix86_tune_memset_strategy = ptr->x_ix86_tune_memset_strategy;
  opts->x_ix86_tune_no_default = ptr->x_ix86_tune_no_default;
  ix86_tune_cost = processor_cost_table[ix86_tune];
  /* TODO: ix86_cost should be chosen at instruction or function granuality
     so for cold code we use size_cost even in !optimize_size compilation.  */
  if (opts->x_optimize_size)
    ix86_cost = &ix86_size_cost;
  else
    ix86_cost = ix86_tune_cost;

  /* Recreate the arch feature tests if the arch changed */
  if (old_arch != ix86_arch)
    {
      ix86_arch_mask = HOST_WIDE_INT_1U << ix86_arch;
      for (i = 0; i < X86_ARCH_LAST; ++i)
	ix86_arch_features[i]
	  = !!(initial_ix86_arch_features[i] & ix86_arch_mask);
    }

  /* Recreate the tune optimization tests */
  if (old_tune != ix86_tune)
    set_ix86_tune_features (opts, ix86_tune, false);
}

/* Adjust target options after streaming them in.  This is mainly about
   reconciling them with global options.  */

void
ix86_function_specific_post_stream_in (struct cl_target_option *ptr)
{
  /* flag_pic is a global option, but ix86_cmodel is target saved option
     partly computed from flag_pic.  If flag_pic is on, adjust x_ix86_cmodel
     for PIC, or error out.  */
  if (flag_pic)
    switch (ptr->x_ix86_cmodel)
      {
      case CM_SMALL:
	ptr->x_ix86_cmodel = CM_SMALL_PIC;
	break;

      case CM_MEDIUM:
	ptr->x_ix86_cmodel = CM_MEDIUM_PIC;
	break;

      case CM_LARGE:
	ptr->x_ix86_cmodel = CM_LARGE_PIC;
	break;

      case CM_KERNEL:
	error ("code model %s does not support PIC mode", "kernel");
	break;

      default:
	break;
      }
  else
    switch (ptr->x_ix86_cmodel)
      {
      case CM_SMALL_PIC:
	ptr->x_ix86_cmodel = CM_SMALL;
	break;

      case CM_MEDIUM_PIC:
	ptr->x_ix86_cmodel = CM_MEDIUM;
	break;

      case CM_LARGE_PIC:
	ptr->x_ix86_cmodel = CM_LARGE;
	break;

      default:
	break;
      }
}

/* Print the current options */

void
ix86_function_specific_print (FILE *file, int indent,
			      struct cl_target_option *ptr)
{
  char *target_string
    = ix86_target_string (ptr->x_ix86_isa_flags, ptr->x_ix86_isa_flags2,
			  ptr->x_target_flags, ptr->x_ix86_target_flags,
			  NULL, NULL, ptr->x_ix86_fpmath,
			  ptr->x_prefer_vector_width_type,
			  ptr->x_ix86_move_max, ptr->x_ix86_store_max,
			  false, true);

  gcc_assert (ptr->arch < PROCESSOR_max);
  fprintf (file, "%*sarch = %d (%s)\n",
	   indent, "",
	   ptr->arch, processor_names[ptr->arch]);

  gcc_assert (ptr->tune < PROCESSOR_max);
  fprintf (file, "%*stune = %d (%s)\n",
	   indent, "",
	   ptr->tune, processor_names[ptr->tune]);

  fprintf (file, "%*sbranch_cost = %d\n", indent, "", ptr->branch_cost);

  if (target_string)
    {
      fprintf (file, "%*s%s\n", indent, "", target_string);
      free (target_string);
    }
}


/* Inner function to process the attribute((target(...))), take an argument and
   set the current options from the argument. If we have a list, recursively go
   over the list.  */

static bool
ix86_valid_target_attribute_inner_p (tree fndecl, tree args, char *p_strings[],
				     struct gcc_options *opts,
				     struct gcc_options *opts_set,
				     struct gcc_options *enum_opts_set,
				     bool target_clone_attr)
{
  char *next_optstr;
  bool ret = true;

#define IX86_ATTR_ISA(S,O)   { S, sizeof (S)-1, ix86_opt_isa, O, 0 }
#define IX86_ATTR_STR(S,O)   { S, sizeof (S)-1, ix86_opt_str, O, 0 }
#define IX86_ATTR_ENUM(S,O)  { S, sizeof (S)-1, ix86_opt_enum, O, 0 }
#define IX86_ATTR_YES(S,O,M) { S, sizeof (S)-1, ix86_opt_yes, O, M }
#define IX86_ATTR_NO(S,O,M)  { S, sizeof (S)-1, ix86_opt_no,  O, M }
#define IX86_ATTR_IX86_YES(S,O,M) \
  { S, sizeof (S)-1, ix86_opt_ix86_yes, O, M }
#define IX86_ATTR_IX86_NO(S,O,M) \
  { S, sizeof (S)-1, ix86_opt_ix86_no,  O, M }

  enum ix86_opt_type
  {
    ix86_opt_unknown,
    ix86_opt_yes,
    ix86_opt_no,
    ix86_opt_ix86_yes,
    ix86_opt_ix86_no,
    ix86_opt_str,
    ix86_opt_enum,
    ix86_opt_isa
  };

  static const struct
  {
    const char *string;
    size_t len;
    enum ix86_opt_type type;
    int opt;
    int mask;
  } attrs[] = {
    /* isa options */
    IX86_ATTR_ISA ("pconfig",	OPT_mpconfig),
    IX86_ATTR_ISA ("wbnoinvd",	OPT_mwbnoinvd),
    IX86_ATTR_ISA ("sgx",	OPT_msgx),
    IX86_ATTR_ISA ("avx5124fmaps", OPT_mavx5124fmaps),
    IX86_ATTR_ISA ("avx5124vnniw", OPT_mavx5124vnniw),
    IX86_ATTR_ISA ("avx512vpopcntdq", OPT_mavx512vpopcntdq),
    IX86_ATTR_ISA ("avx512vbmi2", OPT_mavx512vbmi2),
    IX86_ATTR_ISA ("avx512vnni", OPT_mavx512vnni),
    IX86_ATTR_ISA ("avx512bitalg", OPT_mavx512bitalg),
    IX86_ATTR_ISA ("avx512vp2intersect", OPT_mavx512vp2intersect),

    IX86_ATTR_ISA ("avx512vbmi", OPT_mavx512vbmi),
    IX86_ATTR_ISA ("avx512ifma", OPT_mavx512ifma),
    IX86_ATTR_ISA ("avx512vl",	OPT_mavx512vl),
    IX86_ATTR_ISA ("avx512bw",	OPT_mavx512bw),
    IX86_ATTR_ISA ("avx512dq",	OPT_mavx512dq),
    IX86_ATTR_ISA ("avx512er",	OPT_mavx512er),
    IX86_ATTR_ISA ("avx512pf",	OPT_mavx512pf),
    IX86_ATTR_ISA ("avx512cd",	OPT_mavx512cd),
    IX86_ATTR_ISA ("avx512f",	OPT_mavx512f),
    IX86_ATTR_ISA ("avx2",	OPT_mavx2),
    IX86_ATTR_ISA ("fma",	OPT_mfma),
    IX86_ATTR_ISA ("xop",	OPT_mxop),
    IX86_ATTR_ISA ("fma4",	OPT_mfma4),
    IX86_ATTR_ISA ("f16c",	OPT_mf16c),
    IX86_ATTR_ISA ("avx",	OPT_mavx),
    IX86_ATTR_ISA ("sse4",	OPT_msse4),
    IX86_ATTR_ISA ("sse4.2",	OPT_msse4_2),
    IX86_ATTR_ISA ("sse4.1",	OPT_msse4_1),
    IX86_ATTR_ISA ("sse4a",	OPT_msse4a),
    IX86_ATTR_ISA ("ssse3",	OPT_mssse3),
    IX86_ATTR_ISA ("sse3",	OPT_msse3),
    IX86_ATTR_ISA ("aes",	OPT_maes),
    IX86_ATTR_ISA ("sha",	OPT_msha),
    IX86_ATTR_ISA ("pclmul",	OPT_mpclmul),
    IX86_ATTR_ISA ("sse2",	OPT_msse2),
    IX86_ATTR_ISA ("sse",	OPT_msse),
    IX86_ATTR_ISA ("3dnowa",	OPT_m3dnowa),
    IX86_ATTR_ISA ("3dnow",	OPT_m3dnow),
    IX86_ATTR_ISA ("mmx",	OPT_mmmx),
    IX86_ATTR_ISA ("rtm",	OPT_mrtm),
    IX86_ATTR_ISA ("prfchw",	OPT_mprfchw),
    IX86_ATTR_ISA ("rdseed",	OPT_mrdseed),
    IX86_ATTR_ISA ("adx",	OPT_madx),
    IX86_ATTR_ISA ("prefetchwt1", OPT_mprefetchwt1),
    IX86_ATTR_ISA ("clflushopt", OPT_mclflushopt),
    IX86_ATTR_ISA ("xsaves",	OPT_mxsaves),
    IX86_ATTR_ISA ("xsavec",	OPT_mxsavec),
    IX86_ATTR_ISA ("xsaveopt",	OPT_mxsaveopt),
    IX86_ATTR_ISA ("xsave",	OPT_mxsave),
    IX86_ATTR_ISA ("abm",	OPT_mabm),
    IX86_ATTR_ISA ("bmi",	OPT_mbmi),
    IX86_ATTR_ISA ("bmi2",	OPT_mbmi2),
    IX86_ATTR_ISA ("lzcnt",	OPT_mlzcnt),
    IX86_ATTR_ISA ("tbm",	OPT_mtbm),
    IX86_ATTR_ISA ("popcnt",	OPT_mpopcnt),
    IX86_ATTR_ISA ("cx16",	OPT_mcx16),
    IX86_ATTR_ISA ("sahf",	OPT_msahf),
    IX86_ATTR_ISA ("movbe",	OPT_mmovbe),
    IX86_ATTR_ISA ("crc32",	OPT_mcrc32),
    IX86_ATTR_ISA ("fsgsbase",	OPT_mfsgsbase),
    IX86_ATTR_ISA ("rdrnd",	OPT_mrdrnd),
    IX86_ATTR_ISA ("mwaitx",	OPT_mmwaitx),
    IX86_ATTR_ISA ("mwait",	OPT_mmwait),
    IX86_ATTR_ISA ("clzero",	OPT_mclzero),
    IX86_ATTR_ISA ("pku",	OPT_mpku),
    IX86_ATTR_ISA ("lwp",	OPT_mlwp),
    IX86_ATTR_ISA ("hle",	OPT_mhle),
    IX86_ATTR_ISA ("fxsr",	OPT_mfxsr),
    IX86_ATTR_ISA ("clwb",	OPT_mclwb),
    IX86_ATTR_ISA ("rdpid",	OPT_mrdpid),
    IX86_ATTR_ISA ("gfni",	OPT_mgfni),
    IX86_ATTR_ISA ("shstk",	OPT_mshstk),
    IX86_ATTR_ISA ("vaes",	OPT_mvaes),
    IX86_ATTR_ISA ("vpclmulqdq", OPT_mvpclmulqdq),
    IX86_ATTR_ISA ("movdiri", OPT_mmovdiri),
    IX86_ATTR_ISA ("movdir64b", OPT_mmovdir64b),
    IX86_ATTR_ISA ("waitpkg", OPT_mwaitpkg),
    IX86_ATTR_ISA ("cldemote", OPT_mcldemote),
    IX86_ATTR_ISA ("uintr", OPT_muintr),
    IX86_ATTR_ISA ("ptwrite",   OPT_mptwrite),
    IX86_ATTR_ISA ("kl", OPT_mkl),
    IX86_ATTR_ISA ("widekl",	OPT_mwidekl),
    IX86_ATTR_ISA ("avx512bf16",   OPT_mavx512bf16),
    IX86_ATTR_ISA ("enqcmd", OPT_menqcmd),
    IX86_ATTR_ISA ("serialize", OPT_mserialize),
    IX86_ATTR_ISA ("tsxldtrk", OPT_mtsxldtrk),
    IX86_ATTR_ISA ("amx-tile", OPT_mamx_tile),
    IX86_ATTR_ISA ("amx-int8", OPT_mamx_int8),
    IX86_ATTR_ISA ("amx-bf16", OPT_mamx_bf16),
    IX86_ATTR_ISA ("hreset", OPT_mhreset),
    IX86_ATTR_ISA ("avxvnni",   OPT_mavxvnni),
    IX86_ATTR_ISA ("avx512fp16", OPT_mavx512fp16),

    /* enum options */
    IX86_ATTR_ENUM ("fpmath=",	OPT_mfpmath_),
    IX86_ATTR_ENUM ("prefer-vector-width=", OPT_mprefer_vector_width_),

    /* string options */
    IX86_ATTR_STR ("arch=",	IX86_FUNCTION_SPECIFIC_ARCH),
    IX86_ATTR_STR ("tune=",	IX86_FUNCTION_SPECIFIC_TUNE),

    /* flag options */
    IX86_ATTR_YES ("cld",
		   OPT_mcld,
		   MASK_CLD),

    IX86_ATTR_NO ("fancy-math-387",
		  OPT_mfancy_math_387,
		  MASK_NO_FANCY_MATH_387),

    IX86_ATTR_YES ("ieee-fp",
		   OPT_mieee_fp,
		   MASK_IEEE_FP),

    IX86_ATTR_YES ("inline-all-stringops",
		   OPT_minline_all_stringops,
		   MASK_INLINE_ALL_STRINGOPS),

    IX86_ATTR_YES ("inline-stringops-dynamically",
		   OPT_minline_stringops_dynamically,
		   MASK_INLINE_STRINGOPS_DYNAMICALLY),

    IX86_ATTR_NO ("align-stringops",
		  OPT_mno_align_stringops,
		  MASK_NO_ALIGN_STRINGOPS),

    IX86_ATTR_YES ("recip",
		   OPT_mrecip,
		   MASK_RECIP),

    IX86_ATTR_IX86_YES ("general-regs-only",
			OPT_mgeneral_regs_only,
			OPTION_MASK_GENERAL_REGS_ONLY),

    IX86_ATTR_YES ("relax-cmpxchg-loop",
		   OPT_mrelax_cmpxchg_loop,
		   MASK_RELAX_CMPXCHG_LOOP),
  };

  location_t loc
    = fndecl == NULL ? UNKNOWN_LOCATION : DECL_SOURCE_LOCATION (fndecl);
  const char *attr_name = target_clone_attr ? "target_clone" : "target";

  /* If this is a list, recurse to get the options.  */
  if (TREE_CODE (args) == TREE_LIST)
    {
      for (; args; args = TREE_CHAIN (args))
	if (TREE_VALUE (args)
	    && !ix86_valid_target_attribute_inner_p (fndecl, TREE_VALUE (args),
						     p_strings, opts, opts_set,
						     enum_opts_set,
						     target_clone_attr))
	  ret = false;

      return ret;
    }

  else if (TREE_CODE (args) != STRING_CST)
    {
      error_at (loc, "attribute %qs argument is not a string", attr_name);
      return false;
    }

  /* Handle multiple arguments separated by commas.  */
  next_optstr = ASTRDUP (TREE_STRING_POINTER (args));

  while (next_optstr && *next_optstr != '\0')
    {
      char *p = next_optstr;
      char *orig_p = p;
      char *comma = strchr (next_optstr, ',');
      size_t len, opt_len;
      int opt;
      bool opt_set_p;
      char ch;
      unsigned i;
      enum ix86_opt_type type = ix86_opt_unknown;
      int mask = 0;

      if (comma)
	{
	  *comma = '\0';
	  len = comma - next_optstr;
	  next_optstr = comma + 1;
	}
      else
	{
	  len = strlen (p);
	  next_optstr = NULL;
	}

      /* Recognize no-xxx.  */
      if (len > 3 && p[0] == 'n' && p[1] == 'o' && p[2] == '-')
	{
	  opt_set_p = false;
	  p += 3;
	  len -= 3;
	}
      else
	opt_set_p = true;

      /* Find the option.  */
      ch = *p;
      opt = N_OPTS;
      for (i = 0; i < ARRAY_SIZE (attrs); i++)
	{
	  type = attrs[i].type;
	  opt_len = attrs[i].len;
	  if (ch == attrs[i].string[0]
	      && ((type != ix86_opt_str && type != ix86_opt_enum)
		  ? len == opt_len
		  : len > opt_len)
	      && memcmp (p, attrs[i].string, opt_len) == 0)
	    {
	      opt = attrs[i].opt;
	      mask = attrs[i].mask;
	      break;
	    }
	}

      /* Process the option.  */
      if (opt == N_OPTS)
	{
	  error_at (loc, "attribute %qs argument %qs is unknown",
		    orig_p, attr_name);
	  ret = false;
	}

      else if (type == ix86_opt_isa)
	{
	  struct cl_decoded_option decoded;

	  generate_option (opt, NULL, opt_set_p, CL_TARGET, &decoded);
	  ix86_handle_option (opts, opts_set,
			      &decoded, input_location);
	}

      else if (type == ix86_opt_yes || type == ix86_opt_no)
	{
	  if (type == ix86_opt_no)
	    opt_set_p = !opt_set_p;

	  if (opt_set_p)
	    opts->x_target_flags |= mask;
	  else
	    opts->x_target_flags &= ~mask;
	}

      else if (type == ix86_opt_ix86_yes || type == ix86_opt_ix86_no)
	{
	  if (mask == OPTION_MASK_GENERAL_REGS_ONLY)
	    {
	      if (!opt_set_p)
		{
		  error_at (loc, "pragma or attribute %<target(\"%s\")%> "
			    "does not allow a negated form", p);
		  return false;
		}

	      if (type != ix86_opt_ix86_yes)
		gcc_unreachable ();

	      opts->x_ix86_target_flags |= mask;

	      struct cl_decoded_option decoded;
	      generate_option (opt, NULL, opt_set_p, CL_TARGET,
			       &decoded);
	      ix86_handle_option (opts, opts_set, &decoded,
				  input_location);
	    }
	  else
	    {
	      if (type == ix86_opt_ix86_no)
		opt_set_p = !opt_set_p;

	      if (opt_set_p)
		opts->x_ix86_target_flags |= mask;
	      else
		opts->x_ix86_target_flags &= ~mask;
	    }
	}

      else if (type == ix86_opt_str)
	{
	  if (p_strings[opt])
	    {
	      error_at (loc, "attribute value %qs was already specified "
			"in %qs attribute", orig_p, attr_name);
	      ret = false;
	    }
	  else
	    {
	      p_strings[opt] = xstrdup (p + opt_len);
	      if (opt == IX86_FUNCTION_SPECIFIC_ARCH)
		{
		  /* If arch= is set,  clear all bits in x_ix86_isa_flags,
		     except for ISA_64BIT, ABI_64, ABI_X32, and CODE16
		     and all bits in x_ix86_isa_flags2.  */
		  opts->x_ix86_isa_flags &= (OPTION_MASK_ISA_64BIT
					     | OPTION_MASK_ABI_64
					     | OPTION_MASK_ABI_X32
					     | OPTION_MASK_CODE16);
		  opts->x_ix86_isa_flags_explicit &= (OPTION_MASK_ISA_64BIT
						      | OPTION_MASK_ABI_64
						      | OPTION_MASK_ABI_X32
						      | OPTION_MASK_CODE16);
		  opts->x_ix86_isa_flags2 = 0;
		  opts->x_ix86_isa_flags2_explicit = 0;
		}
	    }
	}

      else if (type == ix86_opt_enum)
	{
	  bool arg_ok;
	  int value;

	  arg_ok = opt_enum_arg_to_value (opt, p + opt_len, &value, CL_TARGET);
	  if (arg_ok)
	    set_option (opts, enum_opts_set, opt, value,
			p + opt_len, DK_UNSPECIFIED, input_location,
			global_dc);
	  else
	    {
	      error_at (loc, "attribute value %qs is unknown in %qs attribute",
			orig_p, attr_name);
	      ret = false;
	    }
	}

      else
	gcc_unreachable ();
    }

  return ret;
}

/* Release allocated strings.  */
static void
release_options_strings (char **option_strings)
{
  /* Free up memory allocated to hold the strings */
  for (unsigned i = 0; i < IX86_FUNCTION_SPECIFIC_MAX; i++)
    free (option_strings[i]);
}

/* Return a TARGET_OPTION_NODE tree of the target options listed or NULL.  */

tree
ix86_valid_target_attribute_tree (tree fndecl, tree args,
				  struct gcc_options *opts,
				  struct gcc_options *opts_set,
				  bool target_clone_attr)
{
  const char *orig_arch_string = opts->x_ix86_arch_string;
  const char *orig_tune_string = opts->x_ix86_tune_string;
  enum fpmath_unit orig_fpmath_set = opts_set->x_ix86_fpmath;
  enum prefer_vector_width orig_pvw_set = opts_set->x_prefer_vector_width_type;
  enum prefer_vector_width orig_ix86_move_max_set
    = opts_set->x_ix86_move_max;
  enum prefer_vector_width orig_ix86_store_max_set
    = opts_set->x_ix86_store_max;
  int orig_tune_defaulted = ix86_tune_defaulted;
  int orig_arch_specified = ix86_arch_specified;
  char *option_strings[IX86_FUNCTION_SPECIFIC_MAX] = { NULL, NULL };
  tree t = NULL_TREE;
  struct cl_target_option *def
    = TREE_TARGET_OPTION (target_option_default_node);
  struct gcc_options enum_opts_set;

  memset (&enum_opts_set, 0, sizeof (enum_opts_set));

  /* Process each of the options on the chain.  */
  if (!ix86_valid_target_attribute_inner_p (fndecl, args, option_strings, opts,
					    opts_set, &enum_opts_set,
					    target_clone_attr))
    return error_mark_node;

  /* If the changed options are different from the default, rerun
     ix86_option_override_internal, and then save the options away.
     The string options are attribute options, and will be undone
     when we copy the save structure.  */
  if (opts->x_ix86_isa_flags != def->x_ix86_isa_flags
      || opts->x_ix86_isa_flags2 != def->x_ix86_isa_flags2
      || opts->x_target_flags != def->x_target_flags
      || option_strings[IX86_FUNCTION_SPECIFIC_ARCH]
      || option_strings[IX86_FUNCTION_SPECIFIC_TUNE]
      || enum_opts_set.x_ix86_fpmath
      || enum_opts_set.x_prefer_vector_width_type)
    {
      /* If we are using the default tune= or arch=, undo the string assigned,
	 and use the default.  */
      if (option_strings[IX86_FUNCTION_SPECIFIC_ARCH])
	opts->x_ix86_arch_string
	  = ggc_strdup (option_strings[IX86_FUNCTION_SPECIFIC_ARCH]);
      else if (!orig_arch_specified)
	opts->x_ix86_arch_string = NULL;

      if (option_strings[IX86_FUNCTION_SPECIFIC_TUNE])
	opts->x_ix86_tune_string
	  = ggc_strdup (option_strings[IX86_FUNCTION_SPECIFIC_TUNE]);
      else if (orig_tune_defaulted)
	opts->x_ix86_tune_string = NULL;

      /* If fpmath= is not set, and we now have sse2 on 32-bit, use it.  */
      if (enum_opts_set.x_ix86_fpmath)
	opts_set->x_ix86_fpmath = (enum fpmath_unit) 1;
      if (enum_opts_set.x_prefer_vector_width_type)
	opts_set->x_prefer_vector_width_type = (enum prefer_vector_width) 1;

      /* Do any overrides, such as arch=xxx, or tune=xxx support.  */
      bool r = ix86_option_override_internal (false, opts, opts_set);
      if (!r)
	{
	  release_options_strings (option_strings);
	  return error_mark_node;
	}

      /* Add any builtin functions with the new isa if any.  */
      ix86_add_new_builtins (opts->x_ix86_isa_flags, opts->x_ix86_isa_flags2);

      enum excess_precision orig_ix86_excess_precision
	= opts->x_ix86_excess_precision;
      bool orig_ix86_unsafe_math_optimizations
	= opts->x_ix86_unsafe_math_optimizations;
      opts->x_ix86_excess_precision = opts->x_flag_excess_precision;
      opts->x_ix86_unsafe_math_optimizations
	= opts->x_flag_unsafe_math_optimizations;

      /* Save the current options unless we are validating options for
	 #pragma.  */
      t = build_target_option_node (opts, opts_set);

      opts->x_ix86_arch_string = orig_arch_string;
      opts->x_ix86_tune_string = orig_tune_string;
      opts_set->x_ix86_fpmath = orig_fpmath_set;
      opts_set->x_prefer_vector_width_type = orig_pvw_set;
      opts_set->x_ix86_move_max = orig_ix86_move_max_set;
      opts_set->x_ix86_store_max = orig_ix86_store_max_set;
      opts->x_ix86_excess_precision = orig_ix86_excess_precision;
      opts->x_ix86_unsafe_math_optimizations
	= orig_ix86_unsafe_math_optimizations;

      release_options_strings (option_strings);
    }

  return t;
}

static GTY(()) tree target_attribute_cache[3];

/* Hook to validate attribute((target("string"))).  */

bool
ix86_valid_target_attribute_p (tree fndecl,
			       tree ARG_UNUSED (name),
			       tree args,
			       int flags)
{
  struct gcc_options func_options, func_options_set;
  tree new_target, new_optimize;
  bool ret = true;

  /* attribute((target("default"))) does nothing, beyond
     affecting multi-versioning.  */
  if (TREE_VALUE (args)
      && TREE_CODE (TREE_VALUE (args)) == STRING_CST
      && TREE_CHAIN (args) == NULL_TREE
      && strcmp (TREE_STRING_POINTER (TREE_VALUE (args)), "default") == 0)
    return true;

  if ((DECL_FUNCTION_SPECIFIC_TARGET (fndecl) == target_attribute_cache[1]
       || DECL_FUNCTION_SPECIFIC_TARGET (fndecl) == NULL_TREE)
      && (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (fndecl)
	  == target_attribute_cache[2]
	  || DECL_FUNCTION_SPECIFIC_OPTIMIZATION (fndecl) == NULL_TREE)
      && simple_cst_list_equal (args, target_attribute_cache[0]))
    {
      DECL_FUNCTION_SPECIFIC_TARGET (fndecl) = target_attribute_cache[1];
      DECL_FUNCTION_SPECIFIC_OPTIMIZATION (fndecl)
	= target_attribute_cache[2];
      return true;
    }

  tree old_optimize = build_optimization_node (&global_options,
					       &global_options_set);

  /* Get the optimization options of the current function.  */  
  tree func_optimize = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (fndecl);
 
  if (!func_optimize)
    func_optimize = old_optimize;

  /* Init func_options.  */
  memset (&func_options, 0, sizeof (func_options));
  init_options_struct (&func_options, NULL);
  lang_hooks.init_options_struct (&func_options);
  memset (&func_options_set, 0, sizeof (func_options_set));

  cl_optimization_restore (&func_options, &func_options_set,
			   TREE_OPTIMIZATION (func_optimize));

  /* Initialize func_options to the default before its target options can
     be set.  */
  tree old_target = DECL_FUNCTION_SPECIFIC_TARGET (fndecl);
  if (old_target == NULL_TREE)
    old_target = target_option_default_node;
  cl_target_option_restore (&func_options, &func_options_set,
			    TREE_TARGET_OPTION (old_target));

  /* FLAGS == 1 is used for target_clones attribute.  */
  new_target
    = ix86_valid_target_attribute_tree (fndecl, args, &func_options,
					&func_options_set, flags == 1);

  new_optimize = build_optimization_node (&func_options, &func_options_set);

  if (new_target == error_mark_node)
    ret = false;

  else if (new_target)
    {
      if (DECL_FUNCTION_SPECIFIC_TARGET (fndecl) == NULL_TREE
	  && DECL_FUNCTION_SPECIFIC_OPTIMIZATION (fndecl) == NULL_TREE)
	{
	  target_attribute_cache[0] = copy_list (args);
	  target_attribute_cache[1] = new_target;
	  target_attribute_cache[2]
	    = old_optimize != new_optimize ? new_optimize : NULL_TREE;
	}

      DECL_FUNCTION_SPECIFIC_TARGET (fndecl) = new_target;

      if (old_optimize != new_optimize)
	DECL_FUNCTION_SPECIFIC_OPTIMIZATION (fndecl) = new_optimize;
    }

  return ret;
}

const char *stringop_alg_names[] = {
#define DEF_ALG(alg, name) #name,
#include "stringop.def"
#undef DEF_ALG
};

/* Parse parameter string passed to -mmemcpy-strategy= or -mmemset-strategy=.
   The string is of the following form (or comma separated list of it):

     strategy_alg:max_size:[align|noalign]

   where the full size range for the strategy is either [0, max_size] or
   [min_size, max_size], in which min_size is the max_size + 1 of the
   preceding range.  The last size range must have max_size == -1.

   Examples:

    1.
       -mmemcpy-strategy=libcall:-1:noalign

      this is equivalent to (for known size memcpy) -mstringop-strategy=libcall


   2.
      -mmemset-strategy=rep_8byte:16:noalign,vector_loop:2048:align,libcall:-1:noalign

      This is to tell the compiler to use the following strategy for memset
      1) when the expected size is between [1, 16], use rep_8byte strategy;
      2) when the size is between [17, 2048], use vector_loop;
      3) when the size is > 2048, use libcall.  */

struct stringop_size_range
{
  int max;
  stringop_alg alg;
  bool noalign;
};

static void
ix86_parse_stringop_strategy_string (char *strategy_str, bool is_memset)
{
  const struct stringop_algs *default_algs;
  stringop_size_range input_ranges[MAX_STRINGOP_ALGS];
  char *curr_range_str, *next_range_str;
  const char *opt = is_memset ? "-mmemset_strategy=" : "-mmemcpy_strategy=";
  int i = 0, n = 0;

  if (is_memset)
    default_algs = &ix86_cost->memset[TARGET_64BIT != 0];
  else
    default_algs = &ix86_cost->memcpy[TARGET_64BIT != 0];

  curr_range_str = strategy_str;

  do
    {
      int maxs;
      char alg_name[128];
      char align[16];
      next_range_str = strchr (curr_range_str, ',');
      if (next_range_str)
        *next_range_str++ = '\0';

      if (sscanf (curr_range_str, "%20[^:]:%d:%10s", alg_name, &maxs,
		  align) != 3)
        {
	  error ("wrong argument %qs to option %qs", curr_range_str, opt);
          return;
        }

      if (n > 0 && (maxs < (input_ranges[n - 1].max + 1) && maxs != -1))
        {
	  error ("size ranges of option %qs should be increasing", opt);
          return;
        }

      for (i = 0; i < last_alg; i++)
	if (!strcmp (alg_name, stringop_alg_names[i]))
	  break;

      if (i == last_alg)
        {
	  error ("wrong strategy name %qs specified for option %qs",
		 alg_name, opt);

	  auto_vec <const char *> candidates;
	  for (i = 0; i < last_alg; i++)
	    if ((stringop_alg) i != rep_prefix_8_byte || TARGET_64BIT)
	      candidates.safe_push (stringop_alg_names[i]);

	  char *s;
	  const char *hint
	    = candidates_list_and_hint (alg_name, s, candidates);
	  if (hint)
	    inform (input_location,
		    "valid arguments to %qs are: %s; did you mean %qs?",
		    opt, s, hint);
	  else
	    inform (input_location, "valid arguments to %qs are: %s",
		    opt, s);
	  XDELETEVEC (s);
          return;
        }

      if ((stringop_alg) i == rep_prefix_8_byte
	  && !TARGET_64BIT)
	{
	  /* rep; movq isn't available in 32-bit code.  */
	  error ("strategy name %qs specified for option %qs "
		 "not supported for 32-bit code", alg_name, opt);
	  return;
	}

      input_ranges[n].max = maxs;
      input_ranges[n].alg = (stringop_alg) i;
      if (!strcmp (align, "align"))
        input_ranges[n].noalign = false;
      else if (!strcmp (align, "noalign"))
        input_ranges[n].noalign = true;
      else
        {
	  error ("unknown alignment %qs specified for option %qs", align, opt);
          return;
        }
      n++;
      curr_range_str = next_range_str;
    }
  while (curr_range_str);

  if (input_ranges[n - 1].max != -1)
    {
      error ("the max value for the last size range should be -1"
             " for option %qs", opt);
      return;
    }

  if (n > MAX_STRINGOP_ALGS)
    {
      error ("too many size ranges specified in option %qs", opt);
      return;
    }

  /* Now override the default algs array.  */
  for (i = 0; i < n; i++)
    {
      *const_cast<int *>(&default_algs->size[i].max) = input_ranges[i].max;
      *const_cast<stringop_alg *>(&default_algs->size[i].alg)
          = input_ranges[i].alg;
      *const_cast<int *>(&default_algs->size[i].noalign)
          = input_ranges[i].noalign;
    }
}


/* parse -mtune-ctrl= option. When DUMP is true,
   print the features that are explicitly set.  */

static void
parse_mtune_ctrl_str (struct gcc_options *opts, bool dump)
{
  if (!opts->x_ix86_tune_ctrl_string)
    return;

  char *next_feature_string = NULL;
  char *curr_feature_string = xstrdup (opts->x_ix86_tune_ctrl_string);
  char *orig = curr_feature_string;
  int i;
  do
    {
      bool clear = false;

      next_feature_string = strchr (curr_feature_string, ',');
      if (next_feature_string)
        *next_feature_string++ = '\0';
      if (*curr_feature_string == '^')
        {
          curr_feature_string++;
          clear = true;
        }
      for (i = 0; i < X86_TUNE_LAST; i++)
        {
          if (!strcmp (curr_feature_string, ix86_tune_feature_names[i]))
            {
              ix86_tune_features[i] = !clear;
              if (dump)
                fprintf (stderr, "Explicitly %s feature %s\n",
                         clear ? "clear" : "set", ix86_tune_feature_names[i]);
              break;
            }
        }
      if (i == X86_TUNE_LAST)
	error ("unknown parameter to option %<-mtune-ctrl%>: %s",
	       clear ? curr_feature_string - 1 : curr_feature_string);
      curr_feature_string = next_feature_string;
    }
  while (curr_feature_string);
  free (orig);
}

/* Helper function to set ix86_tune_features. IX86_TUNE is the
   processor type.  */

static void
set_ix86_tune_features (struct gcc_options *opts,
			enum processor_type ix86_tune, bool dump)
{
  unsigned HOST_WIDE_INT ix86_tune_mask = HOST_WIDE_INT_1U << ix86_tune;
  int i;

  for (i = 0; i < X86_TUNE_LAST; ++i)
    {
      if (ix86_tune_no_default)
        ix86_tune_features[i] = 0;
      else
	ix86_tune_features[i]
	  = !!(initial_ix86_tune_features[i] & ix86_tune_mask);
    }

  if (dump)
    {
      fprintf (stderr, "List of x86 specific tuning parameter names:\n");
      for (i = 0; i < X86_TUNE_LAST; i++)
        fprintf (stderr, "%s : %s\n", ix86_tune_feature_names[i],
                 ix86_tune_features[i] ? "on" : "off");
    }

  parse_mtune_ctrl_str (opts, dump);
}


/* Default align_* from the processor table.  */

static void
ix86_default_align (struct gcc_options *opts)
{
  /* -falign-foo without argument: supply one.  */
  if (opts->x_flag_align_loops && !opts->x_str_align_loops)
    opts->x_str_align_loops = processor_cost_table[ix86_tune]->align_loop;
  if (opts->x_flag_align_jumps && !opts->x_str_align_jumps)
    opts->x_str_align_jumps = processor_cost_table[ix86_tune]->align_jump;
  if (opts->x_flag_align_labels && !opts->x_str_align_labels)
    opts->x_str_align_labels = processor_cost_table[ix86_tune]->align_label;
  if (opts->x_flag_align_functions && !opts->x_str_align_functions)
    opts->x_str_align_functions = processor_cost_table[ix86_tune]->align_func;
}

#ifndef USE_IX86_FRAME_POINTER
#define USE_IX86_FRAME_POINTER 0
#endif

/* (Re)compute option overrides affected by optimization levels in
   target-specific ways.  */

static void
ix86_recompute_optlev_based_flags (struct gcc_options *opts,
				   struct gcc_options *opts_set)
{
  /* Set the default values for switches whose default depends on TARGET_64BIT
     in case they weren't overwritten by command line options.  */
  if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
    {
      if (opts->x_optimize >= 1)
	SET_OPTION_IF_UNSET (opts, opts_set, flag_omit_frame_pointer,
			     !USE_IX86_FRAME_POINTER);
      if (opts->x_flag_asynchronous_unwind_tables
	  && TARGET_64BIT_MS_ABI)
	SET_OPTION_IF_UNSET (opts, opts_set, flag_unwind_tables, 1);
      if (opts->x_flag_asynchronous_unwind_tables == 2)
	opts->x_flag_unwind_tables
	  = opts->x_flag_asynchronous_unwind_tables = 1;
      if (opts->x_flag_pcc_struct_return == 2)
	opts->x_flag_pcc_struct_return = 0;
    }
  else
    {
      if (opts->x_optimize >= 1)
	  SET_OPTION_IF_UNSET (opts, opts_set, flag_omit_frame_pointer,
			       !(USE_IX86_FRAME_POINTER || opts->x_optimize_size));
      if (opts->x_flag_asynchronous_unwind_tables == 2)
	opts->x_flag_asynchronous_unwind_tables = !USE_IX86_FRAME_POINTER;
      if (opts->x_flag_pcc_struct_return == 2)
	{
	  /* Intel MCU psABI specifies that -freg-struct-return should
	     be on.  Instead of setting DEFAULT_PCC_STRUCT_RETURN to 0,
	     we check -miamcu so that -freg-struct-return is always
	     turned on if -miamcu is used.  */
	  if (TARGET_IAMCU_P (opts->x_target_flags))
	    opts->x_flag_pcc_struct_return = 0;
	  else
	    opts->x_flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
	}
    }
}

/* Implement TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE hook.  */

void
ix86_override_options_after_change (void)
{
  ix86_default_align (&global_options);
  ix86_recompute_optlev_based_flags (&global_options, &global_options_set);
}

/* Clear stack slot assignments remembered from previous functions.
   This is called from INIT_EXPANDERS once before RTL is emitted for each
   function.  */

static struct machine_function *
ix86_init_machine_status (void)
{
  struct machine_function *f;

  f = ggc_cleared_alloc<machine_function> ();
  f->call_abi = ix86_abi;
  f->stack_frame_required = true;
  f->silent_p = true;

  return f;
}

/* Override various settings based on options.  If MAIN_ARGS_P, the
   options are from the command line, otherwise they are from
   attributes.  Return true if there's an error related to march
   option.  */

static bool
ix86_option_override_internal (bool main_args_p,
			       struct gcc_options *opts,
			       struct gcc_options *opts_set)
{
  unsigned int i;
  unsigned HOST_WIDE_INT ix86_arch_mask;
  const bool ix86_tune_specified = (opts->x_ix86_tune_string != NULL);

  /* -mrecip options.  */
  static struct
    {
      const char *string;           /* option name */
      unsigned int mask;            /* mask bits to set */
    }
  const recip_options[] =
    {
      { "all",       RECIP_MASK_ALL },
      { "none",      RECIP_MASK_NONE },
      { "div",       RECIP_MASK_DIV },
      { "sqrt",      RECIP_MASK_SQRT },
      { "vec-div",   RECIP_MASK_VEC_DIV },
      { "vec-sqrt",  RECIP_MASK_VEC_SQRT },
    };


  /* Turn off both OPTION_MASK_ABI_64 and OPTION_MASK_ABI_X32 if
     TARGET_64BIT_DEFAULT is true and TARGET_64BIT is false.  */
  if (TARGET_64BIT_DEFAULT && !TARGET_64BIT_P (opts->x_ix86_isa_flags))
    opts->x_ix86_isa_flags &= ~(OPTION_MASK_ABI_64 | OPTION_MASK_ABI_X32);
#ifdef TARGET_BI_ARCH
  else
    {
#if TARGET_BI_ARCH == 1
      /* When TARGET_BI_ARCH == 1, by default, OPTION_MASK_ABI_64
	 is on and OPTION_MASK_ABI_X32 is off.  We turn off
	 OPTION_MASK_ABI_64 if OPTION_MASK_ABI_X32 is turned on by
	 -mx32.  */
      if (TARGET_X32_P (opts->x_ix86_isa_flags))
	opts->x_ix86_isa_flags &= ~OPTION_MASK_ABI_64;
#else
      /* When TARGET_BI_ARCH == 2, by default, OPTION_MASK_ABI_X32 is
	 on and OPTION_MASK_ABI_64 is off.  We turn off
	 OPTION_MASK_ABI_X32 if OPTION_MASK_ABI_64 is turned on by
	 -m64 or OPTION_MASK_CODE16 is turned on by -m16.  */
      if (TARGET_LP64_P (opts->x_ix86_isa_flags)
	  || TARGET_16BIT_P (opts->x_ix86_isa_flags))
	opts->x_ix86_isa_flags &= ~OPTION_MASK_ABI_X32;
#endif
      if (TARGET_64BIT_P (opts->x_ix86_isa_flags)
	  && TARGET_IAMCU_P (opts->x_target_flags))
	sorry ("Intel MCU psABI isn%'t supported in %s mode",
	       TARGET_X32_P (opts->x_ix86_isa_flags) ? "x32" : "64-bit");
    }
#endif

  if (TARGET_X32_P (opts->x_ix86_isa_flags))
    {
      /* Always turn on OPTION_MASK_ISA_64BIT and turn off
	 OPTION_MASK_ABI_64 for TARGET_X32.  */
      opts->x_ix86_isa_flags |= OPTION_MASK_ISA_64BIT;
      opts->x_ix86_isa_flags &= ~OPTION_MASK_ABI_64;
    }
  else if (TARGET_16BIT_P (opts->x_ix86_isa_flags))
    opts->x_ix86_isa_flags &= ~(OPTION_MASK_ISA_64BIT
				| OPTION_MASK_ABI_X32
				| OPTION_MASK_ABI_64);
  else if (TARGET_LP64_P (opts->x_ix86_isa_flags))
    {
      /* Always turn on OPTION_MASK_ISA_64BIT and turn off
	 OPTION_MASK_ABI_X32 for TARGET_LP64.  */
      opts->x_ix86_isa_flags |= OPTION_MASK_ISA_64BIT;
      opts->x_ix86_isa_flags &= ~OPTION_MASK_ABI_X32;
    }

#ifdef SUBTARGET_OVERRIDE_OPTIONS
  SUBTARGET_OVERRIDE_OPTIONS;
#endif

#ifdef SUBSUBTARGET_OVERRIDE_OPTIONS
  SUBSUBTARGET_OVERRIDE_OPTIONS;
#endif

#ifdef HAVE_LD_BROKEN_PE_DWARF5
  /* If the PE linker has broken DWARF 5 support, make
     DWARF 4 the default.  */
  if (TARGET_PECOFF)
    SET_OPTION_IF_UNSET (opts, opts_set, dwarf_version, 4);
#endif

  /* -fPIC is the default for x86_64.  */
  if (TARGET_MACHO && TARGET_64BIT_P (opts->x_ix86_isa_flags))
    opts->x_flag_pic = 2;

  /* Need to check -mtune=generic first.  */
  if (opts->x_ix86_tune_string)
    {
      /* As special support for cross compilers we read -mtune=native
	     as -mtune=generic.  With native compilers we won't see the
	     -mtune=native, as it was changed by the driver.  */
      if (!strcmp (opts->x_ix86_tune_string, "native"))
	opts->x_ix86_tune_string = "generic";
      else if (!strcmp (opts->x_ix86_tune_string, "x86-64"))
        warning (OPT_Wdeprecated,
		 main_args_p
		 ? G_("%<-mtune=x86-64%> is deprecated; use %<-mtune=k8%> "
		      "or %<-mtune=generic%> instead as appropriate")
		 : G_("%<target(\"tune=x86-64\")%> is deprecated; use "
		      "%<target(\"tune=k8\")%> or %<target(\"tune=generic\")%>"
		      " instead as appropriate"));
    }
  else
    {
      if (opts->x_ix86_arch_string)
	opts->x_ix86_tune_string = opts->x_ix86_arch_string;
      if (!opts->x_ix86_tune_string)
	{
	  opts->x_ix86_tune_string = processor_names[TARGET_CPU_DEFAULT];
	  ix86_tune_defaulted = 1;
	}

      /* opts->x_ix86_tune_string is set to opts->x_ix86_arch_string
	 or defaulted.  We need to use a sensible tune option.  */
      if (startswith (opts->x_ix86_tune_string, "x86-64")
	  && (opts->x_ix86_tune_string[6] == '\0'
	      || (!strcmp (opts->x_ix86_tune_string + 6, "-v2")
		  || !strcmp (opts->x_ix86_tune_string + 6, "-v3")
		  || !strcmp (opts->x_ix86_tune_string + 6, "-v4"))))
	opts->x_ix86_tune_string = "generic";
    }

  if (opts->x_ix86_stringop_alg == rep_prefix_8_byte
      && !TARGET_64BIT_P (opts->x_ix86_isa_flags))
    {
      /* rep; movq isn't available in 32-bit code.  */
      error ("%<-mstringop-strategy=rep_8byte%> not supported for 32-bit code");
      opts->x_ix86_stringop_alg = no_stringop;
    }

  if (TARGET_UINTR && !TARGET_64BIT)
    error ("%<-muintr%> not supported for 32-bit code");

  if (!opts->x_ix86_arch_string)
    opts->x_ix86_arch_string
      = TARGET_64BIT_P (opts->x_ix86_isa_flags)
	? "x86-64" : SUBTARGET32_DEFAULT_CPU;
  else
    ix86_arch_specified = 1;

  if (opts_set->x_ix86_pmode)
    {
      if ((TARGET_LP64_P (opts->x_ix86_isa_flags)
	   && opts->x_ix86_pmode == PMODE_SI)
	  || (!TARGET_64BIT_P (opts->x_ix86_isa_flags)
	       && opts->x_ix86_pmode == PMODE_DI))
	error ("address mode %qs not supported in the %s bit mode",
	       TARGET_64BIT_P (opts->x_ix86_isa_flags) ? "short" : "long",
	       TARGET_64BIT_P (opts->x_ix86_isa_flags) ? "64" : "32");
    }
  else
    opts->x_ix86_pmode = TARGET_LP64_P (opts->x_ix86_isa_flags)
			 ? PMODE_DI : PMODE_SI;

  SET_OPTION_IF_UNSET (opts, opts_set, ix86_abi, DEFAULT_ABI);

  if (opts->x_ix86_abi == MS_ABI && TARGET_X32_P (opts->x_ix86_isa_flags))
    error ("%<-mabi=ms%> not supported with X32 ABI");
  gcc_assert (opts->x_ix86_abi == SYSV_ABI || opts->x_ix86_abi == MS_ABI);

  const char *abi_name = opts->x_ix86_abi == MS_ABI ? "ms" : "sysv";
  if ((opts->x_flag_sanitize & SANITIZE_USER_ADDRESS)
      && opts->x_ix86_abi != DEFAULT_ABI)
    error ("%<-mabi=%s%> not supported with %<-fsanitize=address%>", abi_name);
  if ((opts->x_flag_sanitize & SANITIZE_KERNEL_ADDRESS)
      && opts->x_ix86_abi != DEFAULT_ABI)
    error ("%<-mabi=%s%> not supported with %<-fsanitize=kernel-address%>",
	   abi_name);
  if ((opts->x_flag_sanitize & SANITIZE_THREAD)
      && opts->x_ix86_abi != DEFAULT_ABI)
    error ("%<-mabi=%s%> not supported with %<-fsanitize=thread%>", abi_name);

  /* For targets using ms ABI enable ms-extensions, if not
     explicit turned off.  For non-ms ABI we turn off this
     option.  */
  SET_OPTION_IF_UNSET (opts, opts_set, flag_ms_extensions,
		       (MS_ABI == DEFAULT_ABI));

  if (opts_set->x_ix86_cmodel)
    {
      switch (opts->x_ix86_cmodel)
	{
	case CM_SMALL:
	case CM_SMALL_PIC:
	  if (opts->x_flag_pic)
	    opts->x_ix86_cmodel = CM_SMALL_PIC;
	  if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
	    error ("code model %qs not supported in the %s bit mode",
		   "small", "32");
	  break;

	case CM_MEDIUM:
	case CM_MEDIUM_PIC:
	  if (opts->x_flag_pic)
	    opts->x_ix86_cmodel = CM_MEDIUM_PIC;
	  if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
	    error ("code model %qs not supported in the %s bit mode",
		   "medium", "32");
	  else if (TARGET_X32_P (opts->x_ix86_isa_flags))
	    error ("code model %qs not supported in x32 mode",
		   "medium");
	  break;

	case CM_LARGE:
	case CM_LARGE_PIC:
	  if (opts->x_flag_pic)
	    opts->x_ix86_cmodel = CM_LARGE_PIC;
	  if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
	    error ("code model %qs not supported in the %s bit mode",
		   "large", "32");
	  else if (TARGET_X32_P (opts->x_ix86_isa_flags))
	    error ("code model %qs not supported in x32 mode",
		   "large");
	  break;

	case CM_32:
	  if (opts->x_flag_pic)
	    error ("code model %s does not support PIC mode", "32");
	  if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
	    error ("code model %qs not supported in the %s bit mode",
		   "32", "64");
	  break;

	case CM_KERNEL:
	  if (opts->x_flag_pic)
	    {
	      error ("code model %s does not support PIC mode", "kernel");
	      opts->x_ix86_cmodel = CM_32;
	    }
	  if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
	    error ("code model %qs not supported in the %s bit mode",
		   "kernel", "32");
	  break;

	default:
	  gcc_unreachable ();
	}
    }
  else
    {
      /* For TARGET_64BIT and MS_ABI, force pic on, in order to enable the
	 use of rip-relative addressing.  This eliminates fixups that
	 would otherwise be needed if this object is to be placed in a
	 DLL, and is essentially just as efficient as direct addressing.  */
      if (TARGET_64BIT_P (opts->x_ix86_isa_flags)
	  && (TARGET_RDOS || TARGET_PECOFF))
	opts->x_ix86_cmodel = CM_MEDIUM_PIC, opts->x_flag_pic = 1;
      else if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
	opts->x_ix86_cmodel = opts->x_flag_pic ? CM_SMALL_PIC : CM_SMALL;
      else
	opts->x_ix86_cmodel = CM_32;
    }
  if (TARGET_MACHO && opts->x_ix86_asm_dialect == ASM_INTEL)
    {
      error ("%<-masm=intel%> not supported in this configuration");
      opts->x_ix86_asm_dialect = ASM_ATT;
    }
  if ((TARGET_64BIT_P (opts->x_ix86_isa_flags) != 0)
      != ((opts->x_ix86_isa_flags & OPTION_MASK_ISA_64BIT) != 0))
    sorry ("%i-bit mode not compiled in",
	   (opts->x_ix86_isa_flags & OPTION_MASK_ISA_64BIT) ? 64 : 32);

  /* Last processor_alias_table must point to "generic" entry.  */
  gcc_checking_assert (strcmp (processor_alias_table[pta_size - 1].name,
			       "generic") == 0);
  for (i = 0; i < pta_size; i++)
    if (! strcmp (opts->x_ix86_arch_string, processor_alias_table[i].name))
      {
	if (!strcmp (opts->x_ix86_arch_string, "generic"))
	  {
	    error (main_args_p
		   ? G_("%<generic%> CPU can be used only for %<-mtune=%> "
			"switch")
		   : G_("%<generic%> CPU can be used only for "
			"%<target(\"tune=\")%> attribute"));
	    return false;
	  }
	else if (!strcmp (opts->x_ix86_arch_string, "intel"))
	  {
	    error (main_args_p
		   ? G_("%<intel%> CPU can be used only for %<-mtune=%> "
			"switch")
		   : G_("%<intel%> CPU can be used only for "
			"%<target(\"tune=\")%> attribute"));
	    return false;
	  }

	if (TARGET_64BIT_P (opts->x_ix86_isa_flags)
	    && !((processor_alias_table[i].flags & PTA_64BIT) != 0))
	  {
	    error ("CPU you selected does not support x86-64 "
		   "instruction set");
	    return false;
	  }

	ix86_schedule = processor_alias_table[i].schedule;
	ix86_arch = processor_alias_table[i].processor;

	/* Default cpu tuning to the architecture, unless the table
	   entry requests not to do this.  Used by the x86-64 psABI
	   micro-architecture levels.  */
	if ((processor_alias_table[i].flags & PTA_NO_TUNE) == 0)
	  ix86_tune = ix86_arch;
	else
	  ix86_tune = PROCESSOR_GENERIC;

	/* Enable PTA flags that are enabled by default by a -march option.  */
#define TARGET_EXPLICIT_NO_SAHF_P(opts) (false)
#define SET_TARGET_NO_SAHF(opts) {}
#define TARGET_EXPLICIT_PREFETCH_SSE_P(opts) (false)
#define SET_TARGET_PREFETCH_SSE(opts) {}
#define TARGET_EXPLICIT_NO_TUNE_P(opts) (false)
#define SET_TARGET_NO_TUNE(opts) {}
#define TARGET_EXPLICIT_NO_80387_P(opts) (false)
#define SET_TARGET_NO_80387(opts) {}

#define DEF_PTA(NAME) \
	if (((processor_alias_table[i].flags & PTA_ ## NAME) != 0) \
	    && PTA_ ## NAME != PTA_64BIT \
	    && (TARGET_64BIT || PTA_ ## NAME != PTA_UINTR) \
	    && !TARGET_EXPLICIT_ ## NAME ## _P (opts)) \
	  SET_TARGET_ ## NAME (opts);
#include "i386-isa.def"
#undef DEF_PTA


       if (!(TARGET_64BIT_P (opts->x_ix86_isa_flags)
	     && ((processor_alias_table[i].flags & PTA_NO_SAHF) != 0))
	   && !TARGET_EXPLICIT_SAHF_P (opts))
	    SET_TARGET_SAHF (opts);

	if (((processor_alias_table[i].flags & PTA_ABM) != 0)
	    && !TARGET_EXPLICIT_ABM_P (opts))
	  {
	    if (!TARGET_EXPLICIT_LZCNT_P (opts))
	      SET_TARGET_LZCNT (opts);
	    if (!TARGET_EXPLICIT_POPCNT_P (opts))
	      SET_TARGET_POPCNT (opts);
	  }

	if ((processor_alias_table[i].flags
	   & (PTA_PREFETCH_SSE | PTA_SSE)) != 0)
	  ix86_prefetch_sse = true;

	/* Don't enable x87 instructions if only general registers are
	   allowed by target("general-regs-only") function attribute or
	   -mgeneral-regs-only.  */
	if (!(opts->x_ix86_target_flags & OPTION_MASK_GENERAL_REGS_ONLY)
	    && !(opts_set->x_target_flags & MASK_80387))
	  {
	    if (((processor_alias_table[i].flags & PTA_NO_80387) != 0))
	      opts->x_target_flags &= ~MASK_80387;
	    else
	      opts->x_target_flags |= MASK_80387;
	  }
	break;
      }

  if (i == pta_size)
    {
      error (main_args_p
	     ? G_("bad value (%qs) for %<-march=%> switch")
	     : G_("bad value (%qs) for %<target(\"arch=\")%> attribute"),
	     opts->x_ix86_arch_string);

      auto_vec <const char *> candidates;
      for (i = 0; i < pta_size; i++)
	if (strcmp (processor_alias_table[i].name, "generic")
	    && strcmp (processor_alias_table[i].name, "intel")
	    && (!TARGET_64BIT_P (opts->x_ix86_isa_flags)
		|| ((processor_alias_table[i].flags & PTA_64BIT) != 0)))
	  candidates.safe_push (processor_alias_table[i].name);

#ifdef HAVE_LOCAL_CPU_DETECT
      /* Add also "native" as possible value.  */
      candidates.safe_push ("native");
#endif

      char *s;
      const char *hint
	= candidates_list_and_hint (opts->x_ix86_arch_string, s, candidates);
      if (hint)
	inform (input_location,
		main_args_p
		? G_("valid arguments to %<-march=%> switch are: "
		     "%s; did you mean %qs?")
		: G_("valid arguments to %<target(\"arch=\")%> attribute are: "
		     "%s; did you mean %qs?"), s, hint);
      else
	inform (input_location,
		main_args_p
		? G_("valid arguments to %<-march=%> switch are: %s")
		: G_("valid arguments to %<target(\"arch=\")%> attribute "
		     "are: %s"), s);
      XDELETEVEC (s);
    }

  ix86_arch_mask = HOST_WIDE_INT_1U << ix86_arch;
  for (i = 0; i < X86_ARCH_LAST; ++i)
    ix86_arch_features[i] = !!(initial_ix86_arch_features[i] & ix86_arch_mask);

  for (i = 0; i < pta_size; i++)
    if (! strcmp (opts->x_ix86_tune_string, processor_alias_table[i].name)
	&& (processor_alias_table[i].flags & PTA_NO_TUNE) == 0)
      {
	ix86_schedule = processor_alias_table[i].schedule;
	ix86_tune = processor_alias_table[i].processor;
	if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
	  {
	    if (!((processor_alias_table[i].flags & PTA_64BIT) != 0))
	      {
		if (ix86_tune_defaulted)
		  {
		    opts->x_ix86_tune_string = "x86-64";
		    for (i = 0; i < pta_size; i++)
		      if (! strcmp (opts->x_ix86_tune_string,
				    processor_alias_table[i].name))
			break;
		    ix86_schedule = processor_alias_table[i].schedule;
		    ix86_tune = processor_alias_table[i].processor;
		  }
		else
		  error ("CPU you selected does not support x86-64 "
			 "instruction set");
	      }
	  }
	/* Intel CPUs have always interpreted SSE prefetch instructions as
	   NOPs; so, we can enable SSE prefetch instructions even when
	   -mtune (rather than -march) points us to a processor that has them.
	   However, the VIA C3 gives a SIGILL, so we only do that for i686 and
	   higher processors.  */
	if (TARGET_CMOV
	    && ((processor_alias_table[i].flags
	      & (PTA_PREFETCH_SSE | PTA_SSE)) != 0))
	  ix86_prefetch_sse = true;
	break;
      }

  if (ix86_tune_specified && i == pta_size)
    {
      error (main_args_p
	     ? G_("bad value (%qs) for %<-mtune=%> switch")
	     : G_("bad value (%qs) for %<target(\"tune=\")%> attribute"),
	     opts->x_ix86_tune_string);

      auto_vec <const char *> candidates;
      for (i = 0; i < pta_size; i++)
	if ((!TARGET_64BIT_P (opts->x_ix86_isa_flags)
	     || ((processor_alias_table[i].flags & PTA_64BIT) != 0))
	    && (processor_alias_table[i].flags & PTA_NO_TUNE) == 0)
	  candidates.safe_push (processor_alias_table[i].name);

#ifdef HAVE_LOCAL_CPU_DETECT
      /* Add also "native" as possible value.  */
      candidates.safe_push ("native");
#endif

      char *s;
      const char *hint
	= candidates_list_and_hint (opts->x_ix86_tune_string, s, candidates);
      if (hint)
	inform (input_location,
		main_args_p
		? G_("valid arguments to %<-mtune=%> switch are: "
		     "%s; did you mean %qs?")
		: G_("valid arguments to %<target(\"tune=\")%> attribute are: "
		     "%s; did you mean %qs?"), s, hint);
      else
	inform (input_location,
		main_args_p
		? G_("valid arguments to %<-mtune=%> switch are: %s")
		: G_("valid arguments to %<target(\"tune=\")%> attribute "
		     "are: %s"), s);
      XDELETEVEC (s);
    }

  set_ix86_tune_features (opts, ix86_tune, opts->x_ix86_dump_tunes);

  ix86_recompute_optlev_based_flags (opts, opts_set);

  ix86_tune_cost = processor_cost_table[ix86_tune];
  /* TODO: ix86_cost should be chosen at instruction or function granuality
     so for cold code we use size_cost even in !optimize_size compilation.  */
  if (opts->x_optimize_size)
    ix86_cost = &ix86_size_cost;
  else
    ix86_cost = ix86_tune_cost;

  /* Arrange to set up i386_stack_locals for all functions.  */
  init_machine_status = ix86_init_machine_status;

  /* Validate -mregparm= value.  */
  if (opts_set->x_ix86_regparm)
    {
      if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
	warning (0, "%<-mregparm%> is ignored in 64-bit mode");
      else if (TARGET_IAMCU_P (opts->x_target_flags))
	warning (0, "%<-mregparm%> is ignored for Intel MCU psABI");
      if (opts->x_ix86_regparm > REGPARM_MAX)
	{
	  error ("%<-mregparm=%d%> is not between 0 and %d",
		 opts->x_ix86_regparm, REGPARM_MAX);
	  opts->x_ix86_regparm = 0;
	}
    }
  if (TARGET_IAMCU_P (opts->x_target_flags)
      || TARGET_64BIT_P (opts->x_ix86_isa_flags))
    opts->x_ix86_regparm = REGPARM_MAX;

  /* Default align_* from the processor table.  */
  ix86_default_align (opts);

  /* Provide default for -mbranch-cost= value.  */
  SET_OPTION_IF_UNSET (opts, opts_set, ix86_branch_cost,
		       ix86_tune_cost->branch_cost);

  if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
    {
      opts->x_target_flags
	|= TARGET_SUBTARGET64_DEFAULT & ~opts_set->x_target_flags;

      if (!ix86_arch_specified)
	opts->x_ix86_isa_flags
	  |= TARGET_SUBTARGET64_ISA_DEFAULT & ~opts->x_ix86_isa_flags_explicit;

      if (!TARGET_128BIT_LONG_DOUBLE_P (opts->x_target_flags))
	error ("%<-m96bit-long-double%> is not compatible with this target");

      if (TARGET_RTD_P (opts->x_target_flags))
	warning (0,
		 main_args_p
		 ? G_("%<-mrtd%> is ignored in 64bit mode")
		 : G_("%<target(\"rtd\")%> is ignored in 64bit mode"));
    }
  else
    {
      opts->x_target_flags
	|= TARGET_SUBTARGET32_DEFAULT & ~opts_set->x_target_flags;

      if (!ix86_arch_specified)
        opts->x_ix86_isa_flags
	  |= TARGET_SUBTARGET32_ISA_DEFAULT & ~opts->x_ix86_isa_flags_explicit;

      /* i386 ABI does not specify red zone.  It still makes sense to use it
         when programmer takes care to stack from being destroyed.  */
      if (!(opts_set->x_target_flags & MASK_NO_RED_ZONE))
        opts->x_target_flags |= MASK_NO_RED_ZONE;
    }

  /* Keep nonleaf frame pointers.  */
  if (opts->x_flag_omit_frame_pointer)
    opts->x_target_flags &= ~MASK_OMIT_LEAF_FRAME_POINTER;
  else if (TARGET_OMIT_LEAF_FRAME_POINTER_P (opts->x_target_flags))
    opts->x_flag_omit_frame_pointer = 1;

  /* If we're doing fast math, we don't care about comparison order
     wrt NaNs.  This lets us use a shorter comparison sequence.  */
  if (opts->x_flag_finite_math_only)
    opts->x_target_flags &= ~MASK_IEEE_FP;

  /* If the architecture always has an FPU, turn off NO_FANCY_MATH_387,
     since the insns won't need emulation.  */
  if (ix86_tune_features [X86_TUNE_ALWAYS_FANCY_MATH_387])
    opts->x_target_flags &= ~MASK_NO_FANCY_MATH_387;

  /* Likewise, if the target doesn't have a 387, or we've specified
     software floating point, don't use 387 inline intrinsics.  */
  if (!TARGET_80387_P (opts->x_target_flags))
    opts->x_target_flags |= MASK_NO_FANCY_MATH_387;

  /* Turn on MMX builtins for -msse.  */
  if (TARGET_SSE_P (opts->x_ix86_isa_flags))
    opts->x_ix86_isa_flags
      |= OPTION_MASK_ISA_MMX & ~opts->x_ix86_isa_flags_explicit;

  /* Enable SSE prefetch.  */
  if (TARGET_SSE_P (opts->x_ix86_isa_flags)
      || (TARGET_PRFCHW_P (opts->x_ix86_isa_flags)
	  && !TARGET_3DNOW_P (opts->x_ix86_isa_flags))
      || TARGET_PREFETCHWT1_P (opts->x_ix86_isa_flags))
    ix86_prefetch_sse = true;

  /* Enable mwait/monitor instructions for -msse3.  */
  if (TARGET_SSE3_P (opts->x_ix86_isa_flags))
    opts->x_ix86_isa_flags2
      |= OPTION_MASK_ISA2_MWAIT & ~opts->x_ix86_isa_flags2_explicit;

  /* Enable popcnt instruction for -msse4.2 or -mabm.  */
  if (TARGET_SSE4_2_P (opts->x_ix86_isa_flags)
      || TARGET_ABM_P (opts->x_ix86_isa_flags))
    opts->x_ix86_isa_flags
      |= OPTION_MASK_ISA_POPCNT & ~opts->x_ix86_isa_flags_explicit;

  /* Enable crc32 instruction for -msse4.2.  */
  if (TARGET_SSE4_2_P (opts->x_ix86_isa_flags))
    opts->x_ix86_isa_flags
      |= OPTION_MASK_ISA_CRC32 & ~opts->x_ix86_isa_flags_explicit;

  /* Enable lzcnt instruction for -mabm.  */
  if (TARGET_ABM_P(opts->x_ix86_isa_flags))
    opts->x_ix86_isa_flags
      |= OPTION_MASK_ISA_LZCNT & ~opts->x_ix86_isa_flags_explicit;

  /* Disable BMI, BMI2 and TBM instructions for -m16.  */
  if (TARGET_16BIT_P(opts->x_ix86_isa_flags))
    opts->x_ix86_isa_flags
      &= ~((OPTION_MASK_ISA_BMI | OPTION_MASK_ISA_BMI2 | OPTION_MASK_ISA_TBM)
	   & ~opts->x_ix86_isa_flags_explicit);

  /* Validate -mpreferred-stack-boundary= value or default it to
     PREFERRED_STACK_BOUNDARY_DEFAULT.  */
  ix86_preferred_stack_boundary = PREFERRED_STACK_BOUNDARY_DEFAULT;
  if (opts_set->x_ix86_preferred_stack_boundary_arg)
    {
      int min = TARGET_64BIT_P (opts->x_ix86_isa_flags)? 3 : 2;
      int max = TARGET_SEH ? 4 : 12;

      if (opts->x_ix86_preferred_stack_boundary_arg < min
	  || opts->x_ix86_preferred_stack_boundary_arg > max)
	{
	  if (min == max)
	    error ("%<-mpreferred-stack-boundary%> is not supported "
		   "for this target");
	  else
	    error ("%<-mpreferred-stack-boundary=%d%> is not between %d and %d",
		   opts->x_ix86_preferred_stack_boundary_arg, min, max);
	}
      else
	ix86_preferred_stack_boundary
	  = (1 << opts->x_ix86_preferred_stack_boundary_arg) * BITS_PER_UNIT;
    }

  /* Set the default value for -mstackrealign.  */
  SET_OPTION_IF_UNSET (opts, opts_set, ix86_force_align_arg_pointer,
		       STACK_REALIGN_DEFAULT);

  ix86_default_incoming_stack_boundary = PREFERRED_STACK_BOUNDARY;

  /* Validate -mincoming-stack-boundary= value or default it to
     MIN_STACK_BOUNDARY/PREFERRED_STACK_BOUNDARY.  */
  ix86_incoming_stack_boundary = ix86_default_incoming_stack_boundary;
  if (opts_set->x_ix86_incoming_stack_boundary_arg)
    {
      int min = TARGET_64BIT_P (opts->x_ix86_isa_flags) ? 3 : 2;

      if (opts->x_ix86_incoming_stack_boundary_arg < min
	  || opts->x_ix86_incoming_stack_boundary_arg > 12)
	error ("%<-mincoming-stack-boundary=%d%> is not between %d and 12",
	       opts->x_ix86_incoming_stack_boundary_arg, min);
      else
	{
	  ix86_user_incoming_stack_boundary
	    = (1 << opts->x_ix86_incoming_stack_boundary_arg) * BITS_PER_UNIT;
	  ix86_incoming_stack_boundary
	    = ix86_user_incoming_stack_boundary;
	}
    }

#ifndef NO_PROFILE_COUNTERS
  if (flag_nop_mcount)
    error ("%<-mnop-mcount%> is not compatible with this target");
#endif
  if (flag_nop_mcount && flag_pic)
    error ("%<-mnop-mcount%> is not implemented for %<-fPIC%>");

  /* Accept -msseregparm only if at least SSE support is enabled.  */
  if (TARGET_SSEREGPARM_P (opts->x_target_flags)
      && ! TARGET_SSE_P (opts->x_ix86_isa_flags))
    error (main_args_p
	   ? G_("%<-msseregparm%> used without SSE enabled")
	   : G_("%<target(\"sseregparm\")%> used without SSE enabled"));

  if (opts_set->x_ix86_fpmath)
    {
      if (opts->x_ix86_fpmath & FPMATH_SSE)
	{
	  if (!TARGET_SSE_P (opts->x_ix86_isa_flags))
	    {
	      if (TARGET_80387_P (opts->x_target_flags))
		{
		  warning (0, "SSE instruction set disabled, using 387 arithmetics");
		  opts->x_ix86_fpmath = FPMATH_387;
		}
	    }
	  else if ((opts->x_ix86_fpmath & FPMATH_387)
		   && !TARGET_80387_P (opts->x_target_flags))
	    {
	      warning (0, "387 instruction set disabled, using SSE arithmetics");
	      opts->x_ix86_fpmath = FPMATH_SSE;
	    }
	}
    }
  /* For all chips supporting SSE2, -mfpmath=sse performs better than
     fpmath=387.  The second is however default at many targets since the
     extra 80bit precision of temporaries is considered to be part of ABI.
     Overwrite the default at least for -ffast-math. 
     TODO: -mfpmath=both seems to produce same performing code with bit
     smaller binaries.  It is however not clear if register allocation is
     ready for this setting.
     Also -mfpmath=387 is overall a lot more compact (bout 4-5%) than SSE
     codegen.  We may switch to 387 with -ffast-math for size optimized
     functions. */
  else if (fast_math_flags_set_p (&global_options)
	   && TARGET_SSE2_P (opts->x_ix86_isa_flags))
    opts->x_ix86_fpmath = FPMATH_SSE;
  else
    opts->x_ix86_fpmath = TARGET_FPMATH_DEFAULT_P (opts->x_ix86_isa_flags);

  /* Use external vectorized library in vectorizing intrinsics.  */
  if (opts_set->x_ix86_veclibabi_type)
    switch (opts->x_ix86_veclibabi_type)
      {
      case ix86_veclibabi_type_svml:
	ix86_veclib_handler = &ix86_veclibabi_svml;
	break;

      case ix86_veclibabi_type_acml:
	ix86_veclib_handler = &ix86_veclibabi_acml;
	break;

      default:
	gcc_unreachable ();
      }

  if (ix86_tune_features [X86_TUNE_ACCUMULATE_OUTGOING_ARGS]
      && !(opts_set->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS))
    opts->x_target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;

  /* If stack probes are required, the space used for large function
     arguments on the stack must also be probed, so enable
     -maccumulate-outgoing-args so this happens in the prologue.  */
  if (TARGET_STACK_PROBE_P (opts->x_target_flags)
      && !(opts->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS))
    {
      if (opts_set->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS)
	warning (0,
		 main_args_p
		 ? G_("stack probing requires %<-maccumulate-outgoing-args%> "
		      "for correctness")
		 : G_("stack probing requires "
		      "%<target(\"accumulate-outgoing-args\")%> for "
		      "correctness"));
      opts->x_target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;
    }

  /* Stack realignment without -maccumulate-outgoing-args requires %ebp,
     so enable -maccumulate-outgoing-args when %ebp is fixed.  */
  if (fixed_regs[BP_REG]
      && !(opts->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS))
    {
      if (opts_set->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS)
	warning (0,
		 main_args_p
		 ? G_("fixed ebp register requires "
		      "%<-maccumulate-outgoing-args%>")
		 : G_("fixed ebp register requires "
		      "%<target(\"accumulate-outgoing-args\")%>"));
      opts->x_target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;
    }

  /* Figure out what ASM_GENERATE_INTERNAL_LABEL builds as a prefix.  */
  {
    char *p;
    ASM_GENERATE_INTERNAL_LABEL (internal_label_prefix, "LX", 0);
    p = strchr (internal_label_prefix, 'X');
    internal_label_prefix_len = p - internal_label_prefix;
    *p = '\0';
  }

  /* When scheduling description is not available, disable scheduler pass
     so it won't slow down the compilation and make x87 code slower.  */
  if (!TARGET_SCHEDULE)
    opts->x_flag_schedule_insns_after_reload = opts->x_flag_schedule_insns = 0;

  SET_OPTION_IF_UNSET (opts, opts_set, param_simultaneous_prefetches,
		       ix86_tune_cost->simultaneous_prefetches);
  SET_OPTION_IF_UNSET (opts, opts_set, param_l1_cache_line_size,
		       ix86_tune_cost->prefetch_block);
  SET_OPTION_IF_UNSET (opts, opts_set, param_l1_cache_size,
		       ix86_tune_cost->l1_cache_size);
  SET_OPTION_IF_UNSET (opts, opts_set, param_l2_cache_size,
		       ix86_tune_cost->l2_cache_size);

  /* 64B is the accepted value for these for all x86.  */
  SET_OPTION_IF_UNSET (&global_options, &global_options_set,
		       param_destruct_interfere_size, 64);
  SET_OPTION_IF_UNSET (&global_options, &global_options_set,
		       param_construct_interfere_size, 64);

  /* Enable sw prefetching at -O3 for CPUS that prefetching is helpful.  */
  if (opts->x_flag_prefetch_loop_arrays < 0
      && HAVE_prefetch
      && (opts->x_optimize >= 3 || opts->x_flag_profile_use)
      && !opts->x_optimize_size
      && TARGET_SOFTWARE_PREFETCHING_BENEFICIAL)
    opts->x_flag_prefetch_loop_arrays = 1;

  /* If using typedef char *va_list, signal that __builtin_va_start (&ap, 0)
     can be opts->x_optimized to ap = __builtin_next_arg (0).  */
  if (!TARGET_64BIT_P (opts->x_ix86_isa_flags) && !opts->x_flag_split_stack)
    targetm.expand_builtin_va_start = NULL;

#ifdef USE_IX86_CLD
  /* Use -mcld by default for 32-bit code if configured with --enable-cld.  */
  if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
    opts->x_target_flags |= MASK_CLD & ~opts_set->x_target_flags;
#endif

  /* Set the default value for -mfentry.  */
  if (!opts_set->x_flag_fentry)
    opts->x_flag_fentry = TARGET_SEH;
  else
    {
      if (!TARGET_64BIT_P (opts->x_ix86_isa_flags) && opts->x_flag_pic
	  && opts->x_flag_fentry)
	sorry ("%<-mfentry%> isn%'t supported for 32-bit in combination "
	       "with %<-fpic%>");
      else if (TARGET_SEH && !opts->x_flag_fentry)
	sorry ("%<-mno-fentry%> isn%'t compatible with SEH");
    }

  if (TARGET_SEH && TARGET_CALL_MS2SYSV_XLOGUES)
    sorry ("%<-mcall-ms2sysv-xlogues%> isn%'t currently supported with SEH");

  if (!(opts_set->x_target_flags & MASK_VZEROUPPER)
      && TARGET_EMIT_VZEROUPPER)
    opts->x_target_flags |= MASK_VZEROUPPER;
  if (!(opts_set->x_target_flags & MASK_STV))
    opts->x_target_flags |= MASK_STV;
  /* Disable STV if -mpreferred-stack-boundary={2,3} or
     -mincoming-stack-boundary={2,3} or -mstackrealign - the needed
     stack realignment will be extra cost the pass doesn't take into
     account and the pass can't realign the stack.  */
  if (ix86_preferred_stack_boundary < 128
      || ix86_incoming_stack_boundary < 128
      || opts->x_ix86_force_align_arg_pointer)
    opts->x_target_flags &= ~MASK_STV;
  if (!ix86_tune_features[X86_TUNE_AVX256_UNALIGNED_LOAD_OPTIMAL]
      && !(opts_set->x_target_flags & MASK_AVX256_SPLIT_UNALIGNED_LOAD))
    opts->x_target_flags |= MASK_AVX256_SPLIT_UNALIGNED_LOAD;
  else if (!main_args_p
	   && ix86_tune_features[X86_TUNE_AVX256_UNALIGNED_LOAD_OPTIMAL])
    opts->x_target_flags &= ~MASK_AVX256_SPLIT_UNALIGNED_LOAD;

  if (!ix86_tune_features[X86_TUNE_AVX256_UNALIGNED_STORE_OPTIMAL]
      && !(opts_set->x_target_flags & MASK_AVX256_SPLIT_UNALIGNED_STORE))
    opts->x_target_flags |= MASK_AVX256_SPLIT_UNALIGNED_STORE;
  else if (!main_args_p
	   && ix86_tune_features[X86_TUNE_AVX256_UNALIGNED_STORE_OPTIMAL])
    opts->x_target_flags &= ~MASK_AVX256_SPLIT_UNALIGNED_STORE;

  /* Enable 128-bit AVX instruction generation
     for the auto-vectorizer.  */
  if (ix86_tune_features[X86_TUNE_AVX128_OPTIMAL]
      && (opts_set->x_prefer_vector_width_type == PVW_NONE))
    opts->x_prefer_vector_width_type = PVW_AVX128;

  /* Use 256-bit AVX instruction generation
     in the auto-vectorizer.  */
  if (ix86_tune_features[X86_TUNE_AVX256_OPTIMAL]
      && (opts_set->x_prefer_vector_width_type == PVW_NONE))
    opts->x_prefer_vector_width_type = PVW_AVX256;

  if (opts_set->x_ix86_move_max == PVW_NONE)
    {
      /* Set the maximum number of bits can be moved from memory to
	 memory efficiently.  */
      if (ix86_tune_features[X86_TUNE_AVX512_MOVE_BY_PIECES])
	opts->x_ix86_move_max = PVW_AVX512;
      else if (ix86_tune_features[X86_TUNE_AVX256_MOVE_BY_PIECES])
	opts->x_ix86_move_max = PVW_AVX256;
      else
	{
	  opts->x_ix86_move_max = opts->x_prefer_vector_width_type;
	  if (opts_set->x_ix86_move_max == PVW_NONE)
	    {
	      if (TARGET_AVX512F_P (opts->x_ix86_isa_flags))
		opts->x_ix86_move_max = PVW_AVX512;
	      else
		opts->x_ix86_move_max = PVW_AVX128;
	    }
	}
    }

  if (opts_set->x_ix86_store_max == PVW_NONE)
    {
      /* Set the maximum number of bits can be stored to memory
	 efficiently.  */
      if (ix86_tune_features[X86_TUNE_AVX512_STORE_BY_PIECES])
	opts->x_ix86_store_max = PVW_AVX512;
      else if (ix86_tune_features[X86_TUNE_AVX256_STORE_BY_PIECES])
	opts->x_ix86_store_max = PVW_AVX256;
      else
	{
	  opts->x_ix86_store_max = opts->x_prefer_vector_width_type;
	  if (opts_set->x_ix86_store_max == PVW_NONE)
	    {
	      if (TARGET_AVX512F_P (opts->x_ix86_isa_flags))
		opts->x_ix86_store_max = PVW_AVX512;
	      else
		opts->x_ix86_store_max = PVW_AVX128;
	    }
	}
    }

  if (opts->x_ix86_recip_name)
    {
      char *p = ASTRDUP (opts->x_ix86_recip_name);
      char *q;
      unsigned int mask;
      bool invert;

      while ((q = strtok (p, ",")) != NULL)
	{
	  p = NULL;
	  if (*q == '!')
	    {
	      invert = true;
	      q++;
	    }
	  else
	    invert = false;

	  if (!strcmp (q, "default"))
	    mask = RECIP_MASK_ALL;
	  else
	    {
	      for (i = 0; i < ARRAY_SIZE (recip_options); i++)
		if (!strcmp (q, recip_options[i].string))
		  {
		    mask = recip_options[i].mask;
		    break;
		  }

	      if (i == ARRAY_SIZE (recip_options))
		{
		  error ("unknown option for %<-mrecip=%s%>", q);
		  invert = false;
		  mask = RECIP_MASK_NONE;
		}
	    }

	  opts->x_recip_mask_explicit |= mask;
	  if (invert)
	    opts->x_recip_mask &= ~mask;
	  else
	    opts->x_recip_mask |= mask;
	}
    }

  if (TARGET_RECIP_P (opts->x_target_flags))
    opts->x_recip_mask |= RECIP_MASK_ALL & ~opts->x_recip_mask_explicit;
  else if (opts_set->x_target_flags & MASK_RECIP)
    opts->x_recip_mask &= ~(RECIP_MASK_ALL & ~opts->x_recip_mask_explicit);

  /* Default long double to 64-bit for 32-bit Bionic and to __float128
     for 64-bit Bionic.  Also default long double to 64-bit for Intel
     MCU psABI.  */
  if ((TARGET_HAS_BIONIC || TARGET_IAMCU)
      && !(opts_set->x_target_flags
	   & (MASK_LONG_DOUBLE_64 | MASK_LONG_DOUBLE_128)))
    opts->x_target_flags |= (TARGET_64BIT
			     ? MASK_LONG_DOUBLE_128
			     : MASK_LONG_DOUBLE_64);

  /* Only one of them can be active.  */
  gcc_assert ((opts->x_target_flags & MASK_LONG_DOUBLE_64) == 0
	      || (opts->x_target_flags & MASK_LONG_DOUBLE_128) == 0);

  /* Handle stack protector */
  if (!opts_set->x_ix86_stack_protector_guard)
    {
#ifdef TARGET_THREAD_SSP_OFFSET
      if (!TARGET_HAS_BIONIC)
	opts->x_ix86_stack_protector_guard = SSP_TLS;
      else
#endif
	opts->x_ix86_stack_protector_guard = SSP_GLOBAL;
    }

  if (opts_set->x_ix86_stack_protector_guard_offset_str)
    {
      char *endp;
      const char *str = opts->x_ix86_stack_protector_guard_offset_str;

      errno = 0;
      int64_t offset;

#if defined(INT64_T_IS_LONG)
      offset = strtol (str, &endp, 0);
#else
      offset = strtoll (str, &endp, 0);
#endif

      if (!*str || *endp || errno)
	error ("%qs is not a valid number "
	       "in %<-mstack-protector-guard-offset=%>", str);

      if (!IN_RANGE (offset, HOST_WIDE_INT_C (-0x80000000),
		     HOST_WIDE_INT_C (0x7fffffff)))
	error ("%qs is not a valid offset "
	       "in %<-mstack-protector-guard-offset=%>", str);

      opts->x_ix86_stack_protector_guard_offset = offset;
    }
#ifdef TARGET_THREAD_SSP_OFFSET
  else
    opts->x_ix86_stack_protector_guard_offset = TARGET_THREAD_SSP_OFFSET;
#endif

  if (opts_set->x_ix86_stack_protector_guard_reg_str)
    {
      const char *str = opts->x_ix86_stack_protector_guard_reg_str;
      addr_space_t seg = ADDR_SPACE_GENERIC;

      /* Discard optional register prefix.  */
      if (str[0] == '%')
	str++;

      if (strlen (str) == 2 && str[1] == 's')
	{
	  if (str[0] == 'f')
	    seg = ADDR_SPACE_SEG_FS;
	  else if (str[0] == 'g')
	    seg = ADDR_SPACE_SEG_GS;
	}

      if (seg == ADDR_SPACE_GENERIC)
	error ("%qs is not a valid base register "
	       "in %<-mstack-protector-guard-reg=%>",
	       opts->x_ix86_stack_protector_guard_reg_str);

      opts->x_ix86_stack_protector_guard_reg = seg;
    }
  else
    {
      opts->x_ix86_stack_protector_guard_reg = DEFAULT_TLS_SEG_REG;

      /* The kernel uses a different segment register for performance
	 reasons; a system call would not have to trash the userspace
	 segment register, which would be expensive.  */
      if (opts->x_ix86_cmodel == CM_KERNEL)
	opts->x_ix86_stack_protector_guard_reg = ADDR_SPACE_SEG_GS;
    }

  /* Handle -mmemcpy-strategy= and -mmemset-strategy=  */
  if (opts->x_ix86_tune_memcpy_strategy)
    {
      char *str = xstrdup (opts->x_ix86_tune_memcpy_strategy);
      ix86_parse_stringop_strategy_string (str, false);
      free (str);
    }

  if (opts->x_ix86_tune_memset_strategy)
    {
      char *str = xstrdup (opts->x_ix86_tune_memset_strategy);
      ix86_parse_stringop_strategy_string (str, true);
      free (str);
    }

  /* Save the initial options in case the user does function specific
     options.  */
  if (main_args_p)
    {
      opts->x_ix86_excess_precision
	= opts->x_flag_excess_precision;
      opts->x_ix86_unsafe_math_optimizations
	= opts->x_flag_unsafe_math_optimizations;
      target_option_default_node = target_option_current_node
        = build_target_option_node (opts, opts_set);
    }

  if (opts->x_flag_cf_protection != CF_NONE)
    {
      if ((opts->x_flag_cf_protection & CF_BRANCH) == CF_BRANCH
	  && !TARGET_64BIT && !TARGET_CMOV)
	error ("%<-fcf-protection%> is not compatible with this target");

      opts->x_flag_cf_protection
      = (cf_protection_level) (opts->x_flag_cf_protection | CF_SET);
    }

  if (ix86_tune_features [X86_TUNE_AVOID_256FMA_CHAINS])
    SET_OPTION_IF_UNSET (opts, opts_set, param_avoid_fma_max_bits, 256);
  else if (ix86_tune_features [X86_TUNE_AVOID_128FMA_CHAINS])
    SET_OPTION_IF_UNSET (opts, opts_set, param_avoid_fma_max_bits, 128);

  /* PR86952: jump table usage with retpolines is slow.
     The PR provides some numbers about the slowness.  */
  if (ix86_indirect_branch != indirect_branch_keep)
    SET_OPTION_IF_UNSET (opts, opts_set, flag_jump_tables, 0);

  SET_OPTION_IF_UNSET (opts, opts_set, param_ira_consider_dup_in_all_alts, 0);

  /* Fully masking the main or the epilogue vectorized loop is not
     profitable generally so leave it disabled until we get more
     fine grained control & costing.  */
  SET_OPTION_IF_UNSET (opts, opts_set, param_vect_partial_vector_usage, 0);

  return true;
}

/* Implement the TARGET_OPTION_OVERRIDE hook.  */

void
ix86_option_override (void)
{
  ix86_option_override_internal (true, &global_options, &global_options_set);
}

/* Remember the last target of ix86_set_current_function.  */
static GTY(()) tree ix86_previous_fndecl;

/* Set targets globals to the default (or current #pragma GCC target
   if active).  Invalidate ix86_previous_fndecl cache.  */

void
ix86_reset_previous_fndecl (void)
{
  tree new_tree = target_option_current_node;
  cl_target_option_restore (&global_options, &global_options_set,
			    TREE_TARGET_OPTION (new_tree));
  if (TREE_TARGET_GLOBALS (new_tree))
    restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
  else if (new_tree == target_option_default_node)
    restore_target_globals (&default_target_globals);
  else
    TREE_TARGET_GLOBALS (new_tree) = save_target_globals_default_opts ();
  ix86_previous_fndecl = NULL_TREE;
}

/* Add target attribute to SIMD clone NODE if needed.  */

void
ix86_simd_clone_adjust (struct cgraph_node *node)
{
  const char *str = NULL;

  /* Attributes need to be adjusted for definitions, not declarations.  */
  if (!node->definition)
    return;

  gcc_assert (node->decl == cfun->decl);
  switch (node->simdclone->vecsize_mangle)
    {
    case 'b':
      if (!TARGET_SSE2)
	str = "sse2";
      break;
    case 'c':
      if (TARGET_PREFER_AVX128)
	{
	  if (!TARGET_AVX)
	    str = "avx,prefer-vector-width=256";
	  else
	    str = "prefer-vector-width=256";
	}
      else if (!TARGET_AVX)
	str = "avx";
      break;
    case 'd':
      if (TARGET_PREFER_AVX128)
	{
	  if (!TARGET_AVX2)
	    str = "avx2,prefer-vector-width=256";
	  else
	    str = "prefer-vector-width=256";
	}
      else if (!TARGET_AVX2)
	str = "avx2";
      break;
    case 'e':
      if (TARGET_PREFER_AVX256)
	{
	  if (!TARGET_AVX512F)
	    str = "avx512f,prefer-vector-width=512";
	  else
	    str = "prefer-vector-width=512";
	}
      else if (!TARGET_AVX512F)
	str = "avx512f";
      break;
    default:
      gcc_unreachable ();
    }
  if (str == NULL)
    return;
  push_cfun (NULL);
  tree args = build_tree_list (NULL_TREE, build_string (strlen (str), str));
  bool ok = ix86_valid_target_attribute_p (node->decl, NULL, args, 0);
  gcc_assert (ok);
  pop_cfun ();
  ix86_reset_previous_fndecl ();
  ix86_set_current_function (node->decl);
}



/* Set the func_type field from the function FNDECL.  */

static void
ix86_set_func_type (tree fndecl)
{
  if (cfun->machine->func_type == TYPE_UNKNOWN)
    {
      if (lookup_attribute ("interrupt",
			    TYPE_ATTRIBUTES (TREE_TYPE (fndecl))))
	{
	  if (ix86_function_naked (fndecl))
	    error_at (DECL_SOURCE_LOCATION (fndecl),
		      "interrupt and naked attributes are not compatible");

	  int nargs = 0;
	  for (tree arg = DECL_ARGUMENTS (fndecl);
	       arg;
	       arg = TREE_CHAIN (arg))
	    nargs++;
	  cfun->machine->no_caller_saved_registers = true;
	  cfun->machine->func_type
	    = nargs == 2 ? TYPE_EXCEPTION : TYPE_INTERRUPT;

	  ix86_optimize_mode_switching[X86_DIRFLAG] = 1;

	  /* Only dwarf2out.c can handle -WORD(AP) as a pointer argument.  */
	  if (write_symbols != NO_DEBUG && write_symbols != DWARF2_DEBUG)
	    sorry ("only DWARF debug format is supported for interrupt "
		   "service routine");
	}
      else
	{
	  cfun->machine->func_type = TYPE_NORMAL;
	  if (lookup_attribute ("no_caller_saved_registers",
				TYPE_ATTRIBUTES (TREE_TYPE (fndecl))))
	    cfun->machine->no_caller_saved_registers = true;
	}
    }
}

/* Set the indirect_branch_type field from the function FNDECL.  */

static void
ix86_set_indirect_branch_type (tree fndecl)
{
  if (cfun->machine->indirect_branch_type == indirect_branch_unset)
    {
      tree attr = lookup_attribute ("indirect_branch",
				    DECL_ATTRIBUTES (fndecl));
      if (attr != NULL)
	{
	  tree args = TREE_VALUE (attr);
	  if (args == NULL)
	    gcc_unreachable ();
	  tree cst = TREE_VALUE (args);
	  if (strcmp (TREE_STRING_POINTER (cst), "keep") == 0)
	    cfun->machine->indirect_branch_type = indirect_branch_keep;
	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk") == 0)
	    cfun->machine->indirect_branch_type = indirect_branch_thunk;
	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-inline") == 0)
	    cfun->machine->indirect_branch_type = indirect_branch_thunk_inline;
	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-extern") == 0)
	    cfun->machine->indirect_branch_type = indirect_branch_thunk_extern;
	  else
	    gcc_unreachable ();
	}
      else
	cfun->machine->indirect_branch_type = ix86_indirect_branch;

      /* -mcmodel=large is not compatible with -mindirect-branch=thunk
	 nor -mindirect-branch=thunk-extern.  */
      if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC)
	  && ((cfun->machine->indirect_branch_type
	       == indirect_branch_thunk_extern)
	      || (cfun->machine->indirect_branch_type
		  == indirect_branch_thunk)))
	error ("%<-mindirect-branch=%s%> and %<-mcmodel=large%> are not "
	       "compatible",
	       ((cfun->machine->indirect_branch_type
		 == indirect_branch_thunk_extern)
		? "thunk-extern" : "thunk"));

      if (cfun->machine->indirect_branch_type != indirect_branch_keep
	  && (cfun->machine->indirect_branch_type
	      != indirect_branch_thunk_extern)
	  && (flag_cf_protection & CF_RETURN))
	error ("%<-mindirect-branch%> and %<-fcf-protection%> are not "
	       "compatible");
    }

  if (cfun->machine->function_return_type == indirect_branch_unset)
    {
      tree attr = lookup_attribute ("function_return",
				    DECL_ATTRIBUTES (fndecl));
      if (attr != NULL)
	{
	  tree args = TREE_VALUE (attr);
	  if (args == NULL)
	    gcc_unreachable ();
	  tree cst = TREE_VALUE (args);
	  if (strcmp (TREE_STRING_POINTER (cst), "keep") == 0)
	    cfun->machine->function_return_type = indirect_branch_keep;
	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk") == 0)
	    cfun->machine->function_return_type = indirect_branch_thunk;
	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-inline") == 0)
	    cfun->machine->function_return_type = indirect_branch_thunk_inline;
	  else if (strcmp (TREE_STRING_POINTER (cst), "thunk-extern") == 0)
	    cfun->machine->function_return_type = indirect_branch_thunk_extern;
	  else
	    gcc_unreachable ();
	}
      else
	cfun->machine->function_return_type = ix86_function_return;

      /* -mcmodel=large is not compatible with -mfunction-return=thunk
	 nor -mfunction-return=thunk-extern.  */
      if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC)
	  && ((cfun->machine->function_return_type
	       == indirect_branch_thunk_extern)
	      || (cfun->machine->function_return_type
		  == indirect_branch_thunk)))
	error ("%<-mfunction-return=%s%> and %<-mcmodel=large%> are not "
	       "compatible",
	       ((cfun->machine->function_return_type
		 == indirect_branch_thunk_extern)
		? "thunk-extern" : "thunk"));

      if (cfun->machine->function_return_type != indirect_branch_keep
	  && (cfun->machine->function_return_type
	      != indirect_branch_thunk_extern)
	  && (flag_cf_protection & CF_RETURN))
	error ("%<-mfunction-return%> and %<-fcf-protection%> are not "
	       "compatible");
    }
}

/* Establish appropriate back-end context for processing the function
   FNDECL.  The argument might be NULL to indicate processing at top
   level, outside of any function scope.  */
void
ix86_set_current_function (tree fndecl)
{
  /* Only change the context if the function changes.  This hook is called
     several times in the course of compiling a function, and we don't want to
     slow things down too much or call target_reinit when it isn't safe.  */
  if (fndecl == ix86_previous_fndecl)
    {
      /* There may be 2 function bodies for the same function FNDECL,
	 one is extern inline and one isn't.  Call ix86_set_func_type
	 to set the func_type field.  */
      if (fndecl != NULL_TREE)
	{
	  ix86_set_func_type (fndecl);
	  ix86_set_indirect_branch_type (fndecl);
	}
      return;
    }

  tree old_tree;
  if (ix86_previous_fndecl == NULL_TREE)
    old_tree = target_option_current_node;
  else if (DECL_FUNCTION_SPECIFIC_TARGET (ix86_previous_fndecl))
    old_tree = DECL_FUNCTION_SPECIFIC_TARGET (ix86_previous_fndecl);
  else
    old_tree = target_option_default_node;

  if (fndecl == NULL_TREE)
    {
      if (old_tree != target_option_current_node)
	ix86_reset_previous_fndecl ();
      return;
    }

  ix86_set_func_type (fndecl);
  ix86_set_indirect_branch_type (fndecl);

  tree new_tree = DECL_FUNCTION_SPECIFIC_TARGET (fndecl);
  if (new_tree == NULL_TREE)
    new_tree = target_option_default_node;

  if (old_tree != new_tree)
    {
      cl_target_option_restore (&global_options, &global_options_set,
				TREE_TARGET_OPTION (new_tree));
      if (TREE_TARGET_GLOBALS (new_tree))
	restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
      else if (new_tree == target_option_default_node)
	restore_target_globals (&default_target_globals);
      else
	TREE_TARGET_GLOBALS (new_tree) = save_target_globals_default_opts ();
    }
  else if (flag_unsafe_math_optimizations
	   != TREE_TARGET_OPTION (new_tree)->x_ix86_unsafe_math_optimizations
	   || (flag_excess_precision
	       != TREE_TARGET_OPTION (new_tree)->x_ix86_excess_precision))
    {
      cl_target_option_restore (&global_options, &global_options_set,
				TREE_TARGET_OPTION (new_tree));
      ix86_excess_precision = flag_excess_precision;
      ix86_unsafe_math_optimizations = flag_unsafe_math_optimizations;
      DECL_FUNCTION_SPECIFIC_TARGET (fndecl) = new_tree
	= build_target_option_node (&global_options, &global_options_set);
      if (TREE_TARGET_GLOBALS (new_tree))
	restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
      else if (new_tree == target_option_default_node)
	restore_target_globals (&default_target_globals);
      else
	TREE_TARGET_GLOBALS (new_tree) = save_target_globals_default_opts ();
    }
  ix86_previous_fndecl = fndecl;

  static bool prev_no_caller_saved_registers;

  /* 64-bit MS and SYSV ABI have different set of call used registers.
     Avoid expensive re-initialization of init_regs each time we switch
     function context.  */
  if (TARGET_64BIT
      && (call_used_or_fixed_reg_p (SI_REG)
	  == (cfun->machine->call_abi == MS_ABI)))
    reinit_regs ();
  /* Need to re-initialize init_regs if caller-saved registers are
     changed.  */
  else if (prev_no_caller_saved_registers
	   != cfun->machine->no_caller_saved_registers)
    reinit_regs ();

  if (cfun->machine->func_type != TYPE_NORMAL
      || cfun->machine->no_caller_saved_registers)
    {
      /* Don't allow SSE, MMX nor x87 instructions since they
	 may change processor state.  */
      const char *isa;
      if (TARGET_SSE)
	isa = "SSE";
      else if (TARGET_MMX)
	isa = "MMX/3Dnow";
      else if (TARGET_80387)
	isa = "80387";
      else
	isa = NULL;
      if (isa != NULL)
	{
	  if (cfun->machine->func_type != TYPE_NORMAL)
	    sorry (cfun->machine->func_type == TYPE_EXCEPTION
		   ? G_("%s instructions aren%'t allowed in an"
			" exception service routine")
		   : G_("%s instructions aren%'t allowed in an"
			" interrupt service routine"),
		   isa);
	  else
	    sorry ("%s instructions aren%'t allowed in a function with "
		   "the %<no_caller_saved_registers%> attribute", isa);
	  /* Don't issue the same error twice.  */
	  cfun->machine->func_type = TYPE_NORMAL;
	  cfun->machine->no_caller_saved_registers = false;
	}
    }

  prev_no_caller_saved_registers
    = cfun->machine->no_caller_saved_registers;
}

/* Implement the TARGET_OFFLOAD_OPTIONS hook.  */
char *
ix86_offload_options (void)
{
  if (TARGET_LP64)
    return xstrdup ("-foffload-abi=lp64");
  return xstrdup ("-foffload-abi=ilp32");
}

/* Handle "cdecl", "stdcall", "fastcall", "regparm", "thiscall",
   and "sseregparm" calling convention attributes;
   arguments as in struct attribute_spec.handler.  */

static tree
ix86_handle_cconv_attribute (tree *node, tree name, tree args, int,
			     bool *no_add_attrs)
{
  if (TREE_CODE (*node) != FUNCTION_TYPE
      && TREE_CODE (*node) != METHOD_TYPE
      && TREE_CODE (*node) != FIELD_DECL
      && TREE_CODE (*node) != TYPE_DECL)
    {
      warning (OPT_Wattributes, "%qE attribute only applies to functions",
	       name);
      *no_add_attrs = true;
      return NULL_TREE;
    }

  /* Can combine regparm with all attributes but fastcall, and thiscall.  */
  if (is_attribute_p ("regparm", name))
    {
      tree cst;

      if (lookup_attribute ("fastcall", TYPE_ATTRIBUTES (*node)))
        {
	  error ("fastcall and regparm attributes are not compatible");
	}

      if (lookup_attribute ("thiscall", TYPE_ATTRIBUTES (*node)))
	{
	  error ("regparam and thiscall attributes are not compatible");
	}

      cst = TREE_VALUE (args);
      if (TREE_CODE (cst) != INTEGER_CST)
	{
	  warning (OPT_Wattributes,
		   "%qE attribute requires an integer constant argument",
		   name);
	  *no_add_attrs = true;
	}
      else if (compare_tree_int (cst, REGPARM_MAX) > 0)
	{
	  warning (OPT_Wattributes, "argument to %qE attribute larger than %d",
		   name, REGPARM_MAX);
	  *no_add_attrs = true;
	}

      return NULL_TREE;
    }

  if (TARGET_64BIT)
    {
      /* Do not warn when emulating the MS ABI.  */
      if ((TREE_CODE (*node) != FUNCTION_TYPE
	   && TREE_CODE (*node) != METHOD_TYPE)
	  || ix86_function_type_abi (*node) != MS_ABI)
	warning (OPT_Wattributes, "%qE attribute ignored",
	         name);
      *no_add_attrs = true;
      return NULL_TREE;
    }

  /* Can combine fastcall with stdcall (redundant) and sseregparm.  */
  if (is_attribute_p ("fastcall", name))
    {
      if (lookup_attribute ("cdecl", TYPE_ATTRIBUTES (*node)))
        {
	  error ("fastcall and cdecl attributes are not compatible");
	}
      if (lookup_attribute ("stdcall", TYPE_ATTRIBUTES (*node)))
        {
	  error ("fastcall and stdcall attributes are not compatible");
	}
      if (lookup_attribute ("regparm", TYPE_ATTRIBUTES (*node)))
        {
	  error ("fastcall and regparm attributes are not compatible");
	}
      if (lookup_attribute ("thiscall", TYPE_ATTRIBUTES (*node)))
	{
	  error ("fastcall and thiscall attributes are not compatible");
	}
    }

  /* Can combine stdcall with fastcall (redundant), regparm and
     sseregparm.  */
  else if (is_attribute_p ("stdcall", name))
    {
      if (lookup_attribute ("cdecl", TYPE_ATTRIBUTES (*node)))
        {
	  error ("stdcall and cdecl attributes are not compatible");
	}
      if (lookup_attribute ("fastcall", TYPE_ATTRIBUTES (*node)))
        {
	  error ("stdcall and fastcall attributes are not compatible");
	}
      if (lookup_attribute ("thiscall", TYPE_ATTRIBUTES (*node)))
	{
	  error ("stdcall and thiscall attributes are not compatible");
	}
    }

  /* Can combine cdecl with regparm and sseregparm.  */
  else if (is_attribute_p ("cdecl", name))
    {
      if (lookup_attribute ("stdcall", TYPE_ATTRIBUTES (*node)))
        {
	  error ("stdcall and cdecl attributes are not compatible");
	}
      if (lookup_attribute ("fastcall", TYPE_ATTRIBUTES (*node)))
        {
	  error ("fastcall and cdecl attributes are not compatible");
	}
      if (lookup_attribute ("thiscall", TYPE_ATTRIBUTES (*node)))
	{
	  error ("cdecl and thiscall attributes are not compatible");
	}
    }
  else if (is_attribute_p ("thiscall", name))
    {
      if (TREE_CODE (*node) != METHOD_TYPE && pedantic)
	warning (OPT_Wattributes, "%qE attribute is used for non-class method",
	         name);
      if (lookup_attribute ("stdcall", TYPE_ATTRIBUTES (*node)))
	{
	  error ("stdcall and thiscall attributes are not compatible");
	}
      if (lookup_attribute ("fastcall", TYPE_ATTRIBUTES (*node)))
	{
	  error ("fastcall and thiscall attributes are not compatible");
	}
      if (lookup_attribute ("cdecl", TYPE_ATTRIBUTES (*node)))
	{
	  error ("cdecl and thiscall attributes are not compatible");
	}
    }

  /* Can combine sseregparm with all attributes.  */

  return NULL_TREE;
}

#ifndef CHECK_STACK_LIMIT
#define CHECK_STACK_LIMIT (-1)
#endif

/* The transactional memory builtins are implicitly regparm or fastcall
   depending on the ABI.  Override the generic do-nothing attribute that
   these builtins were declared with, and replace it with one of the two
   attributes that we expect elsewhere.  */

static tree
ix86_handle_tm_regparm_attribute (tree *node, tree, tree,
				  int flags, bool *no_add_attrs)
{
  tree alt;

  /* In no case do we want to add the placeholder attribute.  */
  *no_add_attrs = true;

  /* The 64-bit ABI is unchanged for transactional memory.  */
  if (TARGET_64BIT)
    return NULL_TREE;

  /* ??? Is there a better way to validate 32-bit windows?  We have
     cfun->machine->call_abi, but that seems to be set only for 64-bit.  */
  if (CHECK_STACK_LIMIT > 0)
    alt = tree_cons (get_identifier ("fastcall"), NULL, NULL);
  else
    {
      alt = tree_cons (NULL, build_int_cst (NULL, 2), NULL);
      alt = tree_cons (get_identifier ("regparm"), alt, NULL);
    }
  decl_attributes (node, alt, flags);

  return NULL_TREE;
}

/* Handle a "force_align_arg_pointer" attribute.  */

static tree
ix86_handle_force_align_arg_pointer_attribute (tree *node, tree name,
					       tree, int, bool *no_add_attrs)
{
  if (TREE_CODE (*node) != FUNCTION_TYPE
      && TREE_CODE (*node) != METHOD_TYPE
      && TREE_CODE (*node) != FIELD_DECL
      && TREE_CODE (*node) != TYPE_DECL)
    {
      warning (OPT_Wattributes, "%qE attribute only applies to functions",
	       name);
      *no_add_attrs = true;
    }

  return NULL_TREE;
}

/* Handle a "ms_struct" or "gcc_struct" attribute; arguments as in
   struct attribute_spec.handler.  */

static tree
ix86_handle_struct_attribute (tree *node, tree name, tree, int,
			      bool *no_add_attrs)
{
  tree *type = NULL;
  if (DECL_P (*node))
    {
      if (TREE_CODE (*node) == TYPE_DECL)
	type = &TREE_TYPE (*node);
    }
  else
    type = node;

  if (!(type && RECORD_OR_UNION_TYPE_P (*type)))
    {
      warning (OPT_Wattributes, "%qE attribute ignored",
	       name);
      *no_add_attrs = true;
    }

  else if ((is_attribute_p ("ms_struct", name)
	    && lookup_attribute ("gcc_struct", TYPE_ATTRIBUTES (*type)))
	   || ((is_attribute_p ("gcc_struct", name)
		&& lookup_attribute ("ms_struct", TYPE_ATTRIBUTES (*type)))))
    {
      warning (OPT_Wattributes, "%qE incompatible attribute ignored",
               name);
      *no_add_attrs = true;
    }

  return NULL_TREE;
}

/* Handle a "callee_pop_aggregate_return" attribute; arguments as
   in struct attribute_spec handler.  */

static tree
ix86_handle_callee_pop_aggregate_return (tree *node, tree name, tree args, int,
					 bool *no_add_attrs)
{
  if (TREE_CODE (*node) != FUNCTION_TYPE
      && TREE_CODE (*node) != METHOD_TYPE
      && TREE_CODE (*node) != FIELD_DECL
      && TREE_CODE (*node) != TYPE_DECL)
    {
      warning (OPT_Wattributes, "%qE attribute only applies to functions",
	       name);
      *no_add_attrs = true;
      return NULL_TREE;
    }
  if (TARGET_64BIT)
    {
      warning (OPT_Wattributes, "%qE attribute only available for 32-bit",
	       name);
      *no_add_attrs = true;
      return NULL_TREE;
    }
  if (is_attribute_p ("callee_pop_aggregate_return", name))
    {
      tree cst;

      cst = TREE_VALUE (args);
      if (TREE_CODE (cst) != INTEGER_CST)
	{
	  warning (OPT_Wattributes,
		   "%qE attribute requires an integer constant argument",
		   name);
	  *no_add_attrs = true;
	}
      else if (compare_tree_int (cst, 0) != 0
	       && compare_tree_int (cst, 1) != 0)
	{
	  warning (OPT_Wattributes,
		   "argument to %qE attribute is neither zero, nor one",
		   name);
	  *no_add_attrs = true;
	}

      return NULL_TREE;
    }

  return NULL_TREE;
}

/* Handle a "ms_abi" or "sysv" attribute; arguments as in
   struct attribute_spec.handler.  */

static tree
ix86_handle_abi_attribute (tree *node, tree name, tree, int,
			   bool *no_add_attrs)
{
  if (TREE_CODE (*node) != FUNCTION_TYPE
      && TREE_CODE (*node) != METHOD_TYPE
      && TREE_CODE (*node) != FIELD_DECL
      && TREE_CODE (*node) != TYPE_DECL)
    {
      warning (OPT_Wattributes, "%qE attribute only applies to functions",
	       name);
      *no_add_attrs = true;
      return NULL_TREE;
    }

  /* Can combine regparm with all attributes but fastcall.  */
  if (is_attribute_p ("ms_abi", name))
    {
      if (lookup_attribute ("sysv_abi", TYPE_ATTRIBUTES (*node)))
        {
	  error ("%qs and %qs attributes are not compatible",
		 "ms_abi", "sysv_abi");
	}

      return NULL_TREE;
    }
  else if (is_attribute_p ("sysv_abi", name))
    {
      if (lookup_attribute ("ms_abi", TYPE_ATTRIBUTES (*node)))
        {
	  error ("%qs and %qs attributes are not compatible",
		 "ms_abi", "sysv_abi");
	}

      return NULL_TREE;
    }

  return NULL_TREE;
}

static tree
ix86_handle_fndecl_attribute (tree *node, tree name, tree args, int,
			      bool *no_add_attrs)
{
  if (TREE_CODE (*node) != FUNCTION_DECL)
    {
      warning (OPT_Wattributes, "%qE attribute only applies to functions",
               name);
      *no_add_attrs = true;
    }

  if (is_attribute_p ("indirect_branch", name))
    {
      tree cst = TREE_VALUE (args);
      if (TREE_CODE (cst) != STRING_CST)
	{
	  warning (OPT_Wattributes,
		   "%qE attribute requires a string constant argument",
		   name);
	  *no_add_attrs = true;
	}
      else if (strcmp (TREE_STRING_POINTER (cst), "keep") != 0
	       && strcmp (TREE_STRING_POINTER (cst), "thunk") != 0
	       && strcmp (TREE_STRING_POINTER (cst), "thunk-inline") != 0
	       && strcmp (TREE_STRING_POINTER (cst), "thunk-extern") != 0)
	{
	  warning (OPT_Wattributes,
		   "argument to %qE attribute is not "
		   "(keep|thunk|thunk-inline|thunk-extern)", name);
	  *no_add_attrs = true;
	}
    }

  if (is_attribute_p ("function_return", name))
    {
      tree cst = TREE_VALUE (args);
      if (TREE_CODE (cst) != STRING_CST)
	{
	  warning (OPT_Wattributes,
		   "%qE attribute requires a string constant argument",
		   name);
	  *no_add_attrs = true;
	}
      else if (strcmp (TREE_STRING_POINTER (cst), "keep") != 0
	       && strcmp (TREE_STRING_POINTER (cst), "thunk") != 0
	       && strcmp (TREE_STRING_POINTER (cst), "thunk-inline") != 0
	       && strcmp (TREE_STRING_POINTER (cst), "thunk-extern") != 0)
	{
	  warning (OPT_Wattributes,
		   "argument to %qE attribute is not "
		   "(keep|thunk|thunk-inline|thunk-extern)", name);
	  *no_add_attrs = true;
	}
    }

  return NULL_TREE;
}

static tree
ix86_handle_no_caller_saved_registers_attribute (tree *, tree, tree,
						 int, bool *)
{
  return NULL_TREE;
}

static tree
ix86_handle_interrupt_attribute (tree *node, tree, tree, int, bool *)
{
  /* DECL_RESULT and DECL_ARGUMENTS do not exist there yet,
     but the function type contains args and return type data.  */
  tree func_type = *node;
  tree return_type = TREE_TYPE (func_type);

  int nargs = 0;
  tree current_arg_type = TYPE_ARG_TYPES (func_type);
  while (current_arg_type
	 && ! VOID_TYPE_P (TREE_VALUE (current_arg_type)))
    {
      if (nargs == 0)
	{
	  if (! POINTER_TYPE_P (TREE_VALUE (current_arg_type)))
	    error ("interrupt service routine should have a pointer "
		   "as the first argument");
	}
      else if (nargs == 1)
	{
	  if (TREE_CODE (TREE_VALUE (current_arg_type)) != INTEGER_TYPE
	      || TYPE_MODE (TREE_VALUE (current_arg_type)) != word_mode)
	    error ("interrupt service routine should have %qs "
		   "as the second argument",
		   TARGET_64BIT
		   ? (TARGET_X32 ? "unsigned long long int"
				 : "unsigned long int")
		   : "unsigned int");
	}
      nargs++;
      current_arg_type = TREE_CHAIN (current_arg_type);
    }
  if (!nargs || nargs > 2)
    error ("interrupt service routine can only have a pointer argument "
	   "and an optional integer argument");
  if (! VOID_TYPE_P (return_type))
    error ("interrupt service routine must return %<void%>");

  return NULL_TREE;
}

/* Handle fentry_name / fentry_section attribute.  */

static tree
ix86_handle_fentry_name (tree *node, tree name, tree args,
			 int, bool *no_add_attrs)
{
  if (TREE_CODE (*node) == FUNCTION_DECL
      && TREE_CODE (TREE_VALUE (args)) == STRING_CST)
    /* Do nothing else, just set the attribute.  We'll get at
       it later with lookup_attribute.  */
    ;
  else
    {
      warning (OPT_Wattributes, "%qE attribute ignored", name);
      *no_add_attrs = true;
    }

  return NULL_TREE;
}

/* Table of valid machine attributes.  */
const struct attribute_spec ix86_attribute_table[] =
{
  /* { name, min_len, max_len, decl_req, type_req, fn_type_req,
       affects_type_identity, handler, exclude } */
  /* Stdcall attribute says callee is responsible for popping arguments
     if they are not variable.  */
  { "stdcall",   0, 0, false, true,  true,  true, ix86_handle_cconv_attribute,
    NULL },
  /* Fastcall attribute says callee is responsible for popping arguments
     if they are not variable.  */
  { "fastcall",  0, 0, false, true,  true,  true, ix86_handle_cconv_attribute,
    NULL },
  /* Thiscall attribute says callee is responsible for popping arguments
     if they are not variable.  */
  { "thiscall",  0, 0, false, true,  true,  true, ix86_handle_cconv_attribute,
    NULL },
  /* Cdecl attribute says the callee is a normal C declaration */
  { "cdecl",     0, 0, false, true,  true,  true, ix86_handle_cconv_attribute,
    NULL },
  /* Regparm attribute specifies how many integer arguments are to be
     passed in registers.  */
  { "regparm",   1, 1, false, true,  true,  true, ix86_handle_cconv_attribute,
    NULL },
  /* Sseregparm attribute says we are using x86_64 calling conventions
     for FP arguments.  */
  { "sseregparm", 0, 0, false, true, true,  true, ix86_handle_cconv_attribute,
    NULL },
  /* The transactional memory builtins are implicitly regparm or fastcall
     depending on the ABI.  Override the generic do-nothing attribute that
     these builtins were declared with.  */
  { "*tm regparm", 0, 0, false, true, true, true,
    ix86_handle_tm_regparm_attribute, NULL },
  /* force_align_arg_pointer says this function realigns the stack at entry.  */
  { "force_align_arg_pointer", 0, 0,
    false, true,  true, false, ix86_handle_force_align_arg_pointer_attribute,
    NULL },
#if TARGET_DLLIMPORT_DECL_ATTRIBUTES
  { "dllimport", 0, 0, false, false, false, false, handle_dll_attribute,
    NULL },
  { "dllexport", 0, 0, false, false, false, false, handle_dll_attribute,
    NULL },
  { "shared",    0, 0, true,  false, false, false,
    ix86_handle_shared_attribute, NULL },
#endif
  { "ms_struct", 0, 0, false, false,  false, false,
    ix86_handle_struct_attribute, NULL },
  { "gcc_struct", 0, 0, false, false,  false, false,
    ix86_handle_struct_attribute, NULL },
#ifdef SUBTARGET_ATTRIBUTE_TABLE
  SUBTARGET_ATTRIBUTE_TABLE,
#endif
  /* ms_abi and sysv_abi calling convention function attributes.  */
  { "ms_abi", 0, 0, false, true, true, true, ix86_handle_abi_attribute, NULL },
  { "sysv_abi", 0, 0, false, true, true, true, ix86_handle_abi_attribute,
    NULL },
  { "ms_abi va_list", 0, 0, false, false, false, false, NULL, NULL },
  { "sysv_abi va_list", 0, 0, false, false, false, false, NULL, NULL },
  { "ms_hook_prologue", 0, 0, true, false, false, false,
    ix86_handle_fndecl_attribute, NULL },
  { "callee_pop_aggregate_return", 1, 1, false, true, true, true,
    ix86_handle_callee_pop_aggregate_return, NULL },
  { "interrupt", 0, 0, false, true, true, false,
    ix86_handle_interrupt_attribute, NULL },
  { "no_caller_saved_registers", 0, 0, false, true, true, false,
    ix86_handle_no_caller_saved_registers_attribute, NULL },
  { "naked", 0, 0, true, false, false, false,
    ix86_handle_fndecl_attribute, NULL },
  { "indirect_branch", 1, 1, true, false, false, false,
    ix86_handle_fndecl_attribute, NULL },
  { "function_return", 1, 1, true, false, false, false,
    ix86_handle_fndecl_attribute, NULL },
  { "indirect_return", 0, 0, false, true, true, false,
    NULL, NULL },
  { "fentry_name", 1, 1, true, false, false, false,
    ix86_handle_fentry_name, NULL },
  { "fentry_section", 1, 1, true, false, false, false,
    ix86_handle_fentry_name, NULL },
  { "cf_check", 0, 0, true, false, false, false,
    ix86_handle_fndecl_attribute, NULL },

  /* End element.  */
  { NULL, 0, 0, false, false, false, false, NULL, NULL }
};

#include "gt-i386-options.h"