gcc/config/i386/i386-options.c

   1 /* Copyright (C) 1988-2020 Free Software Foundation, Inc.
   2
   3 This file is part of GCC.
   4
   5 GCC is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation; either version 3, or (at your option)
   8 any later version.
   9
  10 GCC is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with GCC; see the file COPYING3.  If not see
  17 <http://www.gnu.org/licenses/>.  */
  18
  19 #define IN_TARGET_CODE 1
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "backend.h"
  25 #include "rtl.h"
  26 #include "tree.h"
  27 #include "memmodel.h"
  28 #include "gimple.h"
  29 #include "cfghooks.h"
  30 #include "cfgloop.h"
  31 #include "df.h"
  32 #include "tm_p.h"
  33 #include "stringpool.h"
  34 #include "expmed.h"
  35 #include "optabs.h"
  36 #include "regs.h"
  37 #include "emit-rtl.h"
  38 #include "recog.h"
  39 #include "cgraph.h"
  40 #include "diagnostic.h"
  41 #include "cfgbuild.h"
  42 #include "alias.h"
  43 #include "fold-const.h"
  44 #include "attribs.h"
  45 #include "calls.h"
  46 #include "stor-layout.h"
  47 #include "varasm.h"
  48 #include "output.h"
  49 #include "insn-attr.h"
  50 #include "flags.h"
  51 #include "except.h"
  52 #include "explow.h"
  53 #include "expr.h"
  54 #include "cfgrtl.h"
  55 #include "common/common-target.h"
  56 #include "langhooks.h"
  57 #include "reload.h"
  58 #include "gimplify.h"
  59 #include "dwarf2.h"
  60 #include "tm-constrs.h"
  61 #include "cselib.h"
  62 #include "sched-int.h"
  63 #include "opts.h"
  64 #include "tree-pass.h"
  65 #include "context.h"
  66 #include "pass_manager.h"
  67 #include "target-globals.h"
  68 #include "gimple-iterator.h"
  69 #include "tree-vectorizer.h"
  70 #include "shrink-wrap.h"
  71 #include "builtins.h"
  72 #include "rtl-iter.h"
  73 #include "tree-iterator.h"
  74 #include "dbgcnt.h"
  75 #include "case-cfn-macros.h"
  76 #include "dojump.h"
  77 #include "fold-const-call.h"
  78 #include "tree-vrp.h"
  79 #include "tree-ssanames.h"
  80 #include "selftest.h"
  81 #include "selftest-rtl.h"
  82 #include "print-rtl.h"
  83 #include "intl.h"
  84 #include "ifcvt.h"
  85 #include "symbol-summary.h"
  86 #include "ipa-prop.h"
  87 #include "ipa-fnsummary.h"
  88 #include "wide-int-bitmask.h"
  89 #include "tree-vector-builder.h"
  90 #include "debug.h"
  91 #include "dwarf2out.h"
  92 #include "i386-options.h"
  93
  94 #include "x86-tune-costs.h"
  95
  96 #ifndef SUBTARGET32_DEFAULT_CPU
  97 #define SUBTARGET32_DEFAULT_CPU "i386"
  98 #endif
  99
 100 /* Processor feature/optimization bitmasks.  */
 101 #define m_386 (HOST_WIDE_INT_1U<<PROCESSOR_I386)
 102 #define m_486 (HOST_WIDE_INT_1U<<PROCESSOR_I486)
 103 #define m_PENT (HOST_WIDE_INT_1U<<PROCESSOR_PENTIUM)
 104 #define m_LAKEMONT (HOST_WIDE_INT_1U<<PROCESSOR_LAKEMONT)
 105 #define m_PPRO (HOST_WIDE_INT_1U<<PROCESSOR_PENTIUMPRO)
 106 #define m_PENT4 (HOST_WIDE_INT_1U<<PROCESSOR_PENTIUM4)
 107 #define m_NOCONA (HOST_WIDE_INT_1U<<PROCESSOR_NOCONA)
 108 #define m_P4_NOCONA (m_PENT4 | m_NOCONA)
 109 #define m_CORE2 (HOST_WIDE_INT_1U<<PROCESSOR_CORE2)
 110 #define m_NEHALEM (HOST_WIDE_INT_1U<<PROCESSOR_NEHALEM)
 111 #define m_SANDYBRIDGE (HOST_WIDE_INT_1U<<PROCESSOR_SANDYBRIDGE)
 112 #define m_HASWELL (HOST_WIDE_INT_1U<<PROCESSOR_HASWELL)
 113 #define m_BONNELL (HOST_WIDE_INT_1U<<PROCESSOR_BONNELL)
 114 #define m_SILVERMONT (HOST_WIDE_INT_1U<<PROCESSOR_SILVERMONT)
 115 #define m_KNL (HOST_WIDE_INT_1U<<PROCESSOR_KNL)
 116 #define m_KNM (HOST_WIDE_INT_1U<<PROCESSOR_KNM)
 117 #define m_SKYLAKE (HOST_WIDE_INT_1U<<PROCESSOR_SKYLAKE)
 118 #define m_SKYLAKE_AVX512 (HOST_WIDE_INT_1U<<PROCESSOR_SKYLAKE_AVX512)
 119 #define m_CANNONLAKE (HOST_WIDE_INT_1U<<PROCESSOR_CANNONLAKE)
 120 #define m_ICELAKE_CLIENT (HOST_WIDE_INT_1U<<PROCESSOR_ICELAKE_CLIENT)
 121 #define m_ICELAKE_SERVER (HOST_WIDE_INT_1U<<PROCESSOR_ICELAKE_SERVER)
 122 #define m_CASCADELAKE (HOST_WIDE_INT_1U<<PROCESSOR_CASCADELAKE)
 123 #define m_TIGERLAKE (HOST_WIDE_INT_1U<<PROCESSOR_TIGERLAKE)
 124 #define m_COOPERLAKE (HOST_WIDE_INT_1U<<PROCESSOR_COOPERLAKE)
 125 #define m_SAPPHIRERAPIDS (HOST_WIDE_INT_1U<<PROCESSOR_SAPPHIRERAPIDS)
 126 #define m_ALDERLAKE (HOST_WIDE_INT_1U<<PROCESSOR_ALDERLAKE)
 127 #define m_CORE_AVX512 (m_SKYLAKE_AVX512 | m_CANNONLAKE \
 128                        | m_ICELAKE_CLIENT | m_ICELAKE_SERVER | m_CASCADELAKE \
 129                        | m_TIGERLAKE | m_COOPERLAKE | m_SAPPHIRERAPIDS)
 130 #define m_CORE_AVX2 (m_HASWELL | m_SKYLAKE | m_CORE_AVX512)
 131 #define m_CORE_ALL (m_CORE2 | m_NEHALEM  | m_SANDYBRIDGE | m_CORE_AVX2)
 132 #define m_GOLDMONT (HOST_WIDE_INT_1U<<PROCESSOR_GOLDMONT)
 133 #define m_GOLDMONT_PLUS (HOST_WIDE_INT_1U<<PROCESSOR_GOLDMONT_PLUS)
 134 #define m_TREMONT (HOST_WIDE_INT_1U<<PROCESSOR_TREMONT)
 135 #define m_INTEL (HOST_WIDE_INT_1U<<PROCESSOR_INTEL)
 136
 137 #define m_GEODE (HOST_WIDE_INT_1U<<PROCESSOR_GEODE)
 138 #define m_K6 (HOST_WIDE_INT_1U<<PROCESSOR_K6)
 139 #define m_K6_GEODE (m_K6 | m_GEODE)
 140 #define m_K8 (HOST_WIDE_INT_1U<<PROCESSOR_K8)
 141 #define m_ATHLON (HOST_WIDE_INT_1U<<PROCESSOR_ATHLON)
 142 #define m_ATHLON_K8 (m_K8 | m_ATHLON)
 143 #define m_AMDFAM10 (HOST_WIDE_INT_1U<<PROCESSOR_AMDFAM10)
 144 #define m_BDVER1 (HOST_WIDE_INT_1U<<PROCESSOR_BDVER1)
 145 #define m_BDVER2 (HOST_WIDE_INT_1U<<PROCESSOR_BDVER2)
 146 #define m_BDVER3 (HOST_WIDE_INT_1U<<PROCESSOR_BDVER3)
 147 #define m_BDVER4 (HOST_WIDE_INT_1U<<PROCESSOR_BDVER4)
 148 #define m_ZNVER1 (HOST_WIDE_INT_1U<<PROCESSOR_ZNVER1)
 149 #define m_ZNVER2 (HOST_WIDE_INT_1U<<PROCESSOR_ZNVER2)
 150 #define m_ZNVER3 (HOST_WIDE_INT_1U<<PROCESSOR_ZNVER3)
 151 #define m_BTVER1 (HOST_WIDE_INT_1U<<PROCESSOR_BTVER1)
 152 #define m_BTVER2 (HOST_WIDE_INT_1U<<PROCESSOR_BTVER2)
 153 #define m_BDVER (m_BDVER1 | m_BDVER2 | m_BDVER3 | m_BDVER4)
 154 #define m_BTVER (m_BTVER1 | m_BTVER2)
 155 #define m_ZNVER (m_ZNVER1 | m_ZNVER2 | m_ZNVER3)
 156 #define m_AMD_MULTIPLE (m_ATHLON_K8 | m_AMDFAM10 | m_BDVER | m_BTVER \
 157                         | m_ZNVER)
 158
 159 #define m_GENERIC (HOST_WIDE_INT_1U<<PROCESSOR_GENERIC)
 160
 161 const char* ix86_tune_feature_names[X86_TUNE_LAST] = {
 162 #undef DEF_TUNE
 163 #define DEF_TUNE(tune, name, selector) name,
 164 #include "x86-tune.def"
 165 #undef DEF_TUNE
 166 };
 167
 168 /* Feature tests against the various tunings.  */
 169 unsigned char ix86_tune_features[X86_TUNE_LAST];
 170
 171 /* Feature tests against the various tunings used to create ix86_tune_features
 172    based on the processor mask.  */
 173 static unsigned HOST_WIDE_INT initial_ix86_tune_features[X86_TUNE_LAST] = {
 174 #undef DEF_TUNE
 175 #define DEF_TUNE(tune, name, selector) selector,
 176 #include "x86-tune.def"
 177 #undef DEF_TUNE
 178 };
 179
 180 /* Feature tests against the various architecture variations.  */
 181 unsigned char ix86_arch_features[X86_ARCH_LAST];
 182
 183 struct ix86_target_opts
 184 {
 185   const char *option;           /* option string */
 186   HOST_WIDE_INT mask;           /* isa mask options */
 187 };
 188
 189 /* This table is ordered so that options like -msse4.2 that imply other
 190    ISAs come first.  Target string will be displayed in the same order.  */
 191 static struct ix86_target_opts isa2_opts[] =
 192 {
 193   { "-mcx16",           OPTION_MASK_ISA2_CX16 },
 194   { "-mvaes",           OPTION_MASK_ISA2_VAES },
 195   { "-mrdpid",          OPTION_MASK_ISA2_RDPID },
 196   { "-mpconfig",        OPTION_MASK_ISA2_PCONFIG },
 197   { "-mwbnoinvd",       OPTION_MASK_ISA2_WBNOINVD },
 198   { "-mavx512vp2intersect", OPTION_MASK_ISA2_AVX512VP2INTERSECT },
 199   { "-msgx",            OPTION_MASK_ISA2_SGX },
 200   { "-mavx5124vnniw",   OPTION_MASK_ISA2_AVX5124VNNIW },
 201   { "-mavx5124fmaps",   OPTION_MASK_ISA2_AVX5124FMAPS },
 202   { "-mhle",            OPTION_MASK_ISA2_HLE },
 203   { "-mmovbe",          OPTION_MASK_ISA2_MOVBE },
 204   { "-mclzero",         OPTION_MASK_ISA2_CLZERO },
 205   { "-mmwaitx",         OPTION_MASK_ISA2_MWAITX },
 206   { "-mmovdir64b",      OPTION_MASK_ISA2_MOVDIR64B },
 207   { "-mwaitpkg",        OPTION_MASK_ISA2_WAITPKG },
 208   { "-mcldemote",       OPTION_MASK_ISA2_CLDEMOTE },
 209   { "-mptwrite",        OPTION_MASK_ISA2_PTWRITE },
 210   { "-mavx512bf16",     OPTION_MASK_ISA2_AVX512BF16 },
 211   { "-menqcmd",         OPTION_MASK_ISA2_ENQCMD },
 212   { "-mserialize",      OPTION_MASK_ISA2_SERIALIZE },
 213   { "-mtsxldtrk",       OPTION_MASK_ISA2_TSXLDTRK },
 214   { "-mamx-tile",       OPTION_MASK_ISA2_AMX_TILE },
 215   { "-mamx-int8",       OPTION_MASK_ISA2_AMX_INT8 },
 216   { "-mamx-bf16",       OPTION_MASK_ISA2_AMX_BF16 },
 217   { "-muintr",          OPTION_MASK_ISA2_UINTR },
 218   { "-mhreset",         OPTION_MASK_ISA2_HRESET },
 219   { "-mkl",             OPTION_MASK_ISA2_KL },
 220   { "-mwidekl",         OPTION_MASK_ISA2_WIDEKL },
 221   { "-mavxvnni",        OPTION_MASK_ISA2_AVXVNNI }
 222 };
 223 static struct ix86_target_opts isa_opts[] =
 224 {
 225   { "-mavx512vpopcntdq", OPTION_MASK_ISA_AVX512VPOPCNTDQ },
 226   { "-mavx512bitalg",   OPTION_MASK_ISA_AVX512BITALG },
 227   { "-mvpclmulqdq",     OPTION_MASK_ISA_VPCLMULQDQ },
 228   { "-mgfni",           OPTION_MASK_ISA_GFNI },
 229   { "-mavx512vnni",     OPTION_MASK_ISA_AVX512VNNI },
 230   { "-mavx512vbmi2",    OPTION_MASK_ISA_AVX512VBMI2 },
 231   { "-mavx512vbmi",     OPTION_MASK_ISA_AVX512VBMI },
 232   { "-mavx512ifma",     OPTION_MASK_ISA_AVX512IFMA },
 233   { "-mavx512vl",       OPTION_MASK_ISA_AVX512VL },
 234   { "-mavx512bw",       OPTION_MASK_ISA_AVX512BW },
 235   { "-mavx512dq",       OPTION_MASK_ISA_AVX512DQ },
 236   { "-mavx512er",       OPTION_MASK_ISA_AVX512ER },
 237   { "-mavx512pf",       OPTION_MASK_ISA_AVX512PF },
 238   { "-mavx512cd",       OPTION_MASK_ISA_AVX512CD },
 239   { "-mavx512f",        OPTION_MASK_ISA_AVX512F },
 240   { "-mavx2",           OPTION_MASK_ISA_AVX2 },
 241   { "-mfma",            OPTION_MASK_ISA_FMA },
 242   { "-mxop",            OPTION_MASK_ISA_XOP },
 243   { "-mfma4",           OPTION_MASK_ISA_FMA4 },
 244   { "-mf16c",           OPTION_MASK_ISA_F16C },
 245   { "-mavx",            OPTION_MASK_ISA_AVX },
 246 /*{ "-msse4"            OPTION_MASK_ISA_SSE4 }, */
 247   { "-msse4.2",         OPTION_MASK_ISA_SSE4_2 },
 248   { "-msse4.1",         OPTION_MASK_ISA_SSE4_1 },
 249   { "-msse4a",          OPTION_MASK_ISA_SSE4A },
 250   { "-mssse3",          OPTION_MASK_ISA_SSSE3 },
 251   { "-msse3",           OPTION_MASK_ISA_SSE3 },
 252   { "-maes",            OPTION_MASK_ISA_AES },
 253   { "-msha",            OPTION_MASK_ISA_SHA },
 254   { "-mpclmul",         OPTION_MASK_ISA_PCLMUL },
 255   { "-msse2",           OPTION_MASK_ISA_SSE2 },
 256   { "-msse",            OPTION_MASK_ISA_SSE },
 257   { "-m3dnowa",         OPTION_MASK_ISA_3DNOW_A },
 258   { "-m3dnow",          OPTION_MASK_ISA_3DNOW },
 259   { "-mmmx",            OPTION_MASK_ISA_MMX },
 260   { "-mrtm",            OPTION_MASK_ISA_RTM },
 261   { "-mprfchw",         OPTION_MASK_ISA_PRFCHW },
 262   { "-mrdseed",         OPTION_MASK_ISA_RDSEED },
 263   { "-madx",            OPTION_MASK_ISA_ADX },
 264   { "-mprefetchwt1",    OPTION_MASK_ISA_PREFETCHWT1 },
 265   { "-mclflushopt",     OPTION_MASK_ISA_CLFLUSHOPT },
 266   { "-mxsaves",         OPTION_MASK_ISA_XSAVES },
 267   { "-mxsavec",         OPTION_MASK_ISA_XSAVEC },
 268   { "-mxsaveopt",       OPTION_MASK_ISA_XSAVEOPT },
 269   { "-mxsave",          OPTION_MASK_ISA_XSAVE },
 270   { "-mabm",            OPTION_MASK_ISA_ABM },
 271   { "-mbmi",            OPTION_MASK_ISA_BMI },
 272   { "-mbmi2",           OPTION_MASK_ISA_BMI2 },
 273   { "-mlzcnt",          OPTION_MASK_ISA_LZCNT },
 274   { "-mtbm",            OPTION_MASK_ISA_TBM },
 275   { "-mpopcnt",         OPTION_MASK_ISA_POPCNT },
 276   { "-msahf",           OPTION_MASK_ISA_SAHF },
 277   { "-mcrc32",          OPTION_MASK_ISA_CRC32 },
 278   { "-mfsgsbase",       OPTION_MASK_ISA_FSGSBASE },
 279   { "-mrdrnd",          OPTION_MASK_ISA_RDRND },
 280   { "-mpku",            OPTION_MASK_ISA_PKU },
 281   { "-mlwp",            OPTION_MASK_ISA_LWP },
 282   { "-mfxsr",           OPTION_MASK_ISA_FXSR },
 283   { "-mclwb",           OPTION_MASK_ISA_CLWB },
 284   { "-mshstk",          OPTION_MASK_ISA_SHSTK },
 285   { "-mmovdiri",        OPTION_MASK_ISA_MOVDIRI }
 286 };
 287
 288 /* Return 1 if TRAIT NAME is present in the OpenMP context's
 289    device trait set, return 0 if not present in any OpenMP context in the
 290    whole translation unit, or -1 if not present in the current OpenMP context
 291    but might be present in another OpenMP context in the same TU.  */
 292
 293 int
 294 ix86_omp_device_kind_arch_isa (enum omp_device_kind_arch_isa trait,
 295                                const char *name)
 296 {
 297   switch (trait)
 298     {
 299     case omp_device_kind:
 300       return strcmp (name, "cpu") == 0;
 301     case omp_device_arch:
 302       if (strcmp (name, "x86") == 0)
 303         return 1;
 304       if (TARGET_64BIT)
 305         {
 306           if (TARGET_X32)
 307             return strcmp (name, "x32") == 0;
 308           else
 309             return strcmp (name, "x86_64") == 0;
 310         }
 311       if (strcmp (name, "ia32") == 0 || strcmp (name, "i386") == 0)
 312         return 1;
 313       if (strcmp (name, "i486") == 0)
 314         return ix86_arch != PROCESSOR_I386 ? 1 : -1;
 315       if (strcmp (name, "i586") == 0)
 316         return (ix86_arch != PROCESSOR_I386
 317                 && ix86_arch != PROCESSOR_I486) ? 1 : -1;
 318       if (strcmp (name, "i686") == 0)
 319         return (ix86_arch != PROCESSOR_I386
 320                 && ix86_arch != PROCESSOR_I486
 321                 && ix86_arch != PROCESSOR_LAKEMONT
 322                 && ix86_arch != PROCESSOR_PENTIUM) ? 1 : -1;
 323       return 0;
 324     case omp_device_isa:
 325       for (int i = 0; i < 2; i++)
 326         {
 327           struct ix86_target_opts *opts = i ? isa2_opts : isa_opts;
 328           size_t nopts = i ? ARRAY_SIZE (isa2_opts) : ARRAY_SIZE (isa_opts);
 329           HOST_WIDE_INT mask = i ? ix86_isa_flags2 : ix86_isa_flags;
 330           for (size_t n = 0; n < nopts; n++)
 331             {
 332               /* Handle sse4 as an alias to sse4.2.  */
 333               if (opts[n].mask == OPTION_MASK_ISA_SSE4_2)
 334                 {
 335                   if (strcmp (name, "sse4") == 0)
 336                     return (mask & opts[n].mask) != 0 ? 1 : -1;
 337                 }
 338               if (strcmp (name, opts[n].option + 2) == 0)
 339                 return (mask & opts[n].mask) != 0 ? 1 : -1;
 340             }
 341         }
 342       return 0;
 343     default:
 344       gcc_unreachable ();
 345     }
 346 }
 347
 348 /* Return a string that documents the current -m options.  The caller is
 349    responsible for freeing the string.  */
 350
 351 char *
 352 ix86_target_string (HOST_WIDE_INT isa, HOST_WIDE_INT isa2,
 353                     int flags, int flags2,
 354                     const char *arch, const char *tune,
 355                     enum fpmath_unit fpmath,
 356                     enum prefer_vector_width pvw,
 357                     bool add_nl_p, bool add_abi_p)
 358 {
 359   /* Flag options.  */
 360   static struct ix86_target_opts flag_opts[] =
 361   {
 362     { "-m128bit-long-double",           MASK_128BIT_LONG_DOUBLE },
 363     { "-mlong-double-128",              MASK_LONG_DOUBLE_128 },
 364     { "-mlong-double-64",               MASK_LONG_DOUBLE_64 },
 365     { "-m80387",                        MASK_80387 },
 366     { "-maccumulate-outgoing-args",     MASK_ACCUMULATE_OUTGOING_ARGS },
 367     { "-malign-double",                 MASK_ALIGN_DOUBLE },
 368     { "-mcld",                          MASK_CLD },
 369     { "-mfp-ret-in-387",                MASK_FLOAT_RETURNS },
 370     { "-mieee-fp",                      MASK_IEEE_FP },
 371     { "-minline-all-stringops",         MASK_INLINE_ALL_STRINGOPS },
 372     { "-minline-stringops-dynamically", MASK_INLINE_STRINGOPS_DYNAMICALLY },
 373     { "-mms-bitfields",                 MASK_MS_BITFIELD_LAYOUT },
 374     { "-mno-align-stringops",           MASK_NO_ALIGN_STRINGOPS },
 375     { "-mno-fancy-math-387",            MASK_NO_FANCY_MATH_387 },
 376     { "-mno-push-args",                 MASK_NO_PUSH_ARGS },
 377     { "-mno-red-zone",                  MASK_NO_RED_ZONE },
 378     { "-momit-leaf-frame-pointer",      MASK_OMIT_LEAF_FRAME_POINTER },
 379     { "-mrecip",                        MASK_RECIP },
 380     { "-mrtd",                          MASK_RTD },
 381     { "-msseregparm",                   MASK_SSEREGPARM },
 382     { "-mstack-arg-probe",              MASK_STACK_PROBE },
 383     { "-mtls-direct-seg-refs",          MASK_TLS_DIRECT_SEG_REFS },
 384     { "-mvect8-ret-in-mem",             MASK_VECT8_RETURNS },
 385     { "-m8bit-idiv",                    MASK_USE_8BIT_IDIV },
 386     { "-mvzeroupper",                   MASK_VZEROUPPER },
 387     { "-mstv",                          MASK_STV },
 388     { "-mavx256-split-unaligned-load",  MASK_AVX256_SPLIT_UNALIGNED_LOAD },
 389     { "-mavx256-split-unaligned-store", MASK_AVX256_SPLIT_UNALIGNED_STORE },
 390     { "-mcall-ms2sysv-xlogues",         MASK_CALL_MS2SYSV_XLOGUES }
 391   };
 392
 393   /* Additional flag options.  */
 394   static struct ix86_target_opts flag2_opts[] =
 395   {
 396     { "-mgeneral-regs-only",            OPTION_MASK_GENERAL_REGS_ONLY }
 397   };
 398
 399   const char *opts[ARRAY_SIZE (isa_opts) + ARRAY_SIZE (isa2_opts)
 400                    + ARRAY_SIZE (flag_opts) + ARRAY_SIZE (flag2_opts) + 6][2];
 401
 402   char isa_other[40];
 403   char isa2_other[40];
 404   char flags_other[40];
 405   char flags2_other[40];
 406   unsigned num = 0;
 407   unsigned i, j;
 408   char *ret;
 409   char *ptr;
 410   size_t len;
 411   size_t line_len;
 412   size_t sep_len;
 413   const char *abi;
 414
 415   memset (opts, '\0', sizeof (opts));
 416
 417   /* Add -march= option.  */
 418   if (arch)
 419     {
 420       opts[num][0] = "-march=";
 421       opts[num++][1] = arch;
 422     }
 423
 424   /* Add -mtune= option.  */
 425   if (tune)
 426     {
 427       opts[num][0] = "-mtune=";
 428       opts[num++][1] = tune;
 429     }
 430
 431   /* Add -m32/-m64/-mx32.  */
 432   if (add_abi_p)
 433     {
 434       if ((isa & OPTION_MASK_ISA_64BIT) != 0)
 435         {
 436           if ((isa & OPTION_MASK_ABI_64) != 0)
 437             abi = "-m64";
 438           else
 439             abi = "-mx32";
 440         }
 441       else
 442         abi = "-m32";
 443       opts[num++][0] = abi;
 444     }
 445   isa &= ~(OPTION_MASK_ISA_64BIT | OPTION_MASK_ABI_64 | OPTION_MASK_ABI_X32);
 446
 447   /* Pick out the options in isa2 options.  */
 448   for (i = 0; i < ARRAY_SIZE (isa2_opts); i++)
 449     {
 450       if ((isa2 & isa2_opts[i].mask) != 0)
 451         {
 452           opts[num++][0] = isa2_opts[i].option;
 453           isa2 &= ~ isa2_opts[i].mask;
 454         }
 455     }
 456
 457   if (isa2 && add_nl_p)
 458     {
 459       opts[num++][0] = isa2_other;
 460       sprintf (isa2_other, "(other isa2: %#" HOST_WIDE_INT_PRINT "x)", isa2);
 461     }
 462
 463   /* Pick out the options in isa options.  */
 464   for (i = 0; i < ARRAY_SIZE (isa_opts); i++)
 465     {
 466       if ((isa & isa_opts[i].mask) != 0)
 467         {
 468           opts[num++][0] = isa_opts[i].option;
 469           isa &= ~ isa_opts[i].mask;
 470         }
 471     }
 472
 473   if (isa && add_nl_p)
 474     {
 475       opts[num++][0] = isa_other;
 476       sprintf (isa_other, "(other isa: %#" HOST_WIDE_INT_PRINT "x)", isa);
 477     }
 478
 479   /* Add flag options.  */
 480   for (i = 0; i < ARRAY_SIZE (flag_opts); i++)
 481     {
 482       if ((flags & flag_opts[i].mask) != 0)
 483         {
 484           opts[num++][0] = flag_opts[i].option;
 485           flags &= ~ flag_opts[i].mask;
 486         }
 487     }
 488
 489   if (flags && add_nl_p)
 490     {
 491       opts[num++][0] = flags_other;
 492       sprintf (flags_other, "(other flags: %#x)", flags);
 493     }
 494
 495     /* Add additional flag options.  */
 496   for (i = 0; i < ARRAY_SIZE (flag2_opts); i++)
 497     {
 498       if ((flags2 & flag2_opts[i].mask) != 0)
 499         {
 500           opts[num++][0] = flag2_opts[i].option;
 501           flags2 &= ~ flag2_opts[i].mask;
 502         }
 503     }
 504
 505   if (flags2 && add_nl_p)
 506     {
 507       opts[num++][0] = flags2_other;
 508       sprintf (flags2_other, "(other flags2: %#x)", flags2);
 509     }
 510
 511   /* Add -mfpmath= option.  */
 512   if (fpmath)
 513     {
 514       opts[num][0] = "-mfpmath=";
 515       switch ((int) fpmath)
 516         {
 517         case FPMATH_387:
 518           opts[num++][1] = "387";
 519           break;
 520
 521         case FPMATH_SSE:
 522           opts[num++][1] = "sse";
 523           break;
 524
 525         case FPMATH_387 | FPMATH_SSE:
 526           opts[num++][1] = "sse+387";
 527           break;
 528
 529         default:
 530           gcc_unreachable ();
 531         }
 532     }
 533
 534   /* Add -mprefer-vector-width= option.  */
 535   if (pvw)
 536     {
 537       opts[num][0] = "-mprefer-vector-width=";
 538       switch ((int) pvw)
 539         {
 540         case PVW_AVX128:
 541           opts[num++][1] = "128";
 542           break;
 543
 544         case PVW_AVX256:
 545           opts[num++][1] = "256";
 546           break;
 547
 548         case PVW_AVX512:
 549           opts[num++][1] = "512";
 550           break;
 551
 552         default:
 553           gcc_unreachable ();
 554         }
 555     }
 556
 557   /* Any options?  */
 558   if (num == 0)
 559     return NULL;
 560
 561   gcc_assert (num < ARRAY_SIZE (opts));
 562
 563   /* Size the string.  */
 564   len = 0;
 565   sep_len = (add_nl_p) ? 3 : 1;
 566   for (i = 0; i < num; i++)
 567     {
 568       len += sep_len;
 569       for (j = 0; j < 2; j++)
 570         if (opts[i][j])
 571           len += strlen (opts[i][j]);
 572     }
 573
 574   /* Build the string.  */
 575   ret = ptr = (char *) xmalloc (len);
 576   line_len = 0;
 577
 578   for (i = 0; i < num; i++)
 579     {
 580       size_t len2[2];
 581
 582       for (j = 0; j < 2; j++)
 583         len2[j] = (opts[i][j]) ? strlen (opts[i][j]) : 0;
 584
 585       if (i != 0)
 586         {
 587           *ptr++ = ' ';
 588           line_len++;
 589
 590           if (add_nl_p && line_len + len2[0] + len2[1] > 70)
 591             {
 592               *ptr++ = '\\';
 593               *ptr++ = '\n';
 594               line_len = 0;
 595             }
 596         }
 597
 598       for (j = 0; j < 2; j++)
 599         if (opts[i][j])
 600           {
 601             memcpy (ptr, opts[i][j], len2[j]);
 602             ptr += len2[j];
 603             line_len += len2[j];
 604           }
 605     }
 606
 607   *ptr = '\0';
 608   gcc_assert (ret + len >= ptr);
 609
 610   return ret;
 611 }
 612
 613 /* Function that is callable from the debugger to print the current
 614    options.  */
 615 void ATTRIBUTE_UNUSED
 616 ix86_debug_options (void)
 617 {
 618   char *opts = ix86_target_string (ix86_isa_flags, ix86_isa_flags2,
 619                                    target_flags, ix86_target_flags,
 620                                    ix86_arch_string, ix86_tune_string,
 621                                    ix86_fpmath, prefer_vector_width_type,
 622                                    true, true);
 623
 624   if (opts)
 625     {
 626       fprintf (stderr, "%s\n\n", opts);
 627       free (opts);
 628     }
 629   else
 630     fputs ("<no options>\n\n", stderr);
 631
 632   return;
 633 }
 634
 635 /* Save the current options */
 636
 637 void
 638 ix86_function_specific_save (struct cl_target_option *ptr,
 639                              struct gcc_options *opts,
 640                              struct gcc_options */* opts_set */)
 641 {
 642   ptr->arch = ix86_arch;
 643   ptr->schedule = ix86_schedule;
 644   ptr->prefetch_sse = x86_prefetch_sse;
 645   ptr->tune = ix86_tune;
 646   ptr->branch_cost = ix86_branch_cost;
 647   ptr->tune_defaulted = ix86_tune_defaulted;
 648   ptr->arch_specified = ix86_arch_specified;
 649   ptr->x_ix86_isa_flags_explicit = opts->x_ix86_isa_flags_explicit;
 650   ptr->x_ix86_isa_flags2_explicit = opts->x_ix86_isa_flags2_explicit;
 651   ptr->x_recip_mask_explicit = opts->x_recip_mask_explicit;
 652   ptr->x_ix86_arch_string = opts->x_ix86_arch_string;
 653   ptr->x_ix86_tune_string = opts->x_ix86_tune_string;
 654   ptr->x_ix86_cmodel = opts->x_ix86_cmodel;
 655   ptr->x_ix86_abi = opts->x_ix86_abi;
 656   ptr->x_ix86_asm_dialect = opts->x_ix86_asm_dialect;
 657   ptr->x_ix86_branch_cost = opts->x_ix86_branch_cost;
 658   ptr->x_ix86_dump_tunes = opts->x_ix86_dump_tunes;
 659   ptr->x_ix86_force_align_arg_pointer = opts->x_ix86_force_align_arg_pointer;
 660   ptr->x_ix86_force_drap = opts->x_ix86_force_drap;
 661   ptr->x_ix86_incoming_stack_boundary_arg = opts->x_ix86_incoming_stack_boundary_arg;
 662   ptr->x_ix86_pmode = opts->x_ix86_pmode;
 663   ptr->x_ix86_preferred_stack_boundary_arg = opts->x_ix86_preferred_stack_boundary_arg;
 664   ptr->x_ix86_recip_name = opts->x_ix86_recip_name;
 665   ptr->x_ix86_regparm = opts->x_ix86_regparm;
 666   ptr->x_ix86_section_threshold = opts->x_ix86_section_threshold;
 667   ptr->x_ix86_sse2avx = opts->x_ix86_sse2avx;
 668   ptr->x_ix86_stack_protector_guard = opts->x_ix86_stack_protector_guard;
 669   ptr->x_ix86_stringop_alg = opts->x_ix86_stringop_alg;
 670   ptr->x_ix86_tls_dialect = opts->x_ix86_tls_dialect;
 671   ptr->x_ix86_tune_ctrl_string = opts->x_ix86_tune_ctrl_string;
 672   ptr->x_ix86_tune_memcpy_strategy = opts->x_ix86_tune_memcpy_strategy;
 673   ptr->x_ix86_tune_memset_strategy = opts->x_ix86_tune_memset_strategy;
 674   ptr->x_ix86_tune_no_default = opts->x_ix86_tune_no_default;
 675   ptr->x_ix86_veclibabi_type = opts->x_ix86_veclibabi_type;
 676
 677   /* The fields are char but the variables are not; make sure the
 678      values fit in the fields.  */
 679   gcc_assert (ptr->arch == ix86_arch);
 680   gcc_assert (ptr->schedule == ix86_schedule);
 681   gcc_assert (ptr->tune == ix86_tune);
 682   gcc_assert (ptr->branch_cost == ix86_branch_cost);
 683 }
 684
 685 /* Feature tests against the various architecture variations, used to create
 686    ix86_arch_features based on the processor mask.  */
 687 static unsigned HOST_WIDE_INT initial_ix86_arch_features[X86_ARCH_LAST] = {
 688   /* X86_ARCH_CMOV: Conditional move was added for pentiumpro.  */
 689   ~(m_386 | m_486 | m_PENT | m_LAKEMONT | m_K6),
 690
 691   /* X86_ARCH_CMPXCHG: Compare and exchange was added for 80486.  */
 692   ~m_386,
 693
 694   /* X86_ARCH_CMPXCHG8B: Compare and exchange 8 bytes was added for pentium. */
 695   ~(m_386 | m_486),
 696
 697   /* X86_ARCH_XADD: Exchange and add was added for 80486.  */
 698   ~m_386,
 699
 700   /* X86_ARCH_BSWAP: Byteswap was added for 80486.  */
 701   ~m_386,
 702 };
 703
 704 /* This table must be in sync with enum processor_type in i386.h.  */
 705 static const struct processor_costs *processor_cost_table[] =
 706 {
 707   &generic_cost,
 708   &i386_cost,
 709   &i486_cost,
 710   &pentium_cost,
 711   &lakemont_cost,
 712   &pentiumpro_cost,
 713   &pentium4_cost,
 714   &nocona_cost,
 715   &core_cost,
 716   &core_cost,
 717   &core_cost,
 718   &core_cost,
 719   &atom_cost,
 720   &slm_cost,
 721   &slm_cost,
 722   &slm_cost,
 723   &slm_cost,
 724   &slm_cost,
 725   &slm_cost,
 726   &skylake_cost,
 727   &skylake_cost,
 728   &skylake_cost,
 729   &skylake_cost,
 730   &skylake_cost,
 731   &skylake_cost,
 732   &skylake_cost,
 733   &skylake_cost,
 734   &skylake_cost,
 735   &skylake_cost,
 736   &intel_cost,
 737   &geode_cost,
 738   &k6_cost,
 739   &athlon_cost,
 740   &k8_cost,
 741   &amdfam10_cost,
 742   &bdver_cost,
 743   &bdver_cost,
 744   &bdver_cost,
 745   &bdver_cost,
 746   &btver1_cost,
 747   &btver2_cost,
 748   &znver1_cost,
 749   &znver2_cost,
 750   &znver2_cost
 751 };
 752
 753 /* Guarantee that the array is aligned with enum processor_type.  */
 754 STATIC_ASSERT (ARRAY_SIZE (processor_cost_table) == PROCESSOR_max);
 755
 756 static bool
 757 ix86_option_override_internal (bool main_args_p,
 758                                struct gcc_options *opts,
 759                                struct gcc_options *opts_set);
 760 static void
 761 set_ix86_tune_features (struct gcc_options *opts,
 762                         enum processor_type ix86_tune, bool dump);
 763
 764 /* Restore the current options */
 765
 766 void
 767 ix86_function_specific_restore (struct gcc_options *opts,
 768                                 struct gcc_options */* opts_set */,
 769                                 struct cl_target_option *ptr)
 770 {
 771   enum processor_type old_tune = ix86_tune;
 772   enum processor_type old_arch = ix86_arch;
 773   unsigned HOST_WIDE_INT ix86_arch_mask;
 774   int i;
 775
 776   /* We don't change -fPIC.  */
 777   opts->x_flag_pic = flag_pic;
 778
 779   ix86_arch = (enum processor_type) ptr->arch;
 780   ix86_schedule = (enum attr_cpu) ptr->schedule;
 781   ix86_tune = (enum processor_type) ptr->tune;
 782   x86_prefetch_sse = ptr->prefetch_sse;
 783   opts->x_ix86_branch_cost = ptr->branch_cost;
 784   ix86_tune_defaulted = ptr->tune_defaulted;
 785   ix86_arch_specified = ptr->arch_specified;
 786   opts->x_ix86_isa_flags_explicit = ptr->x_ix86_isa_flags_explicit;
 787   opts->x_ix86_isa_flags2_explicit = ptr->x_ix86_isa_flags2_explicit;
 788   opts->x_recip_mask_explicit = ptr->x_recip_mask_explicit;
 789   opts->x_ix86_arch_string = ptr->x_ix86_arch_string;
 790   opts->x_ix86_tune_string = ptr->x_ix86_tune_string;
 791   opts->x_ix86_cmodel = ptr->x_ix86_cmodel;
 792   opts->x_ix86_abi = ptr->x_ix86_abi;
 793   opts->x_ix86_asm_dialect = ptr->x_ix86_asm_dialect;
 794   opts->x_ix86_branch_cost = ptr->x_ix86_branch_cost;
 795   opts->x_ix86_dump_tunes = ptr->x_ix86_dump_tunes;
 796   opts->x_ix86_force_align_arg_pointer = ptr->x_ix86_force_align_arg_pointer;
 797   opts->x_ix86_force_drap = ptr->x_ix86_force_drap;
 798   opts->x_ix86_incoming_stack_boundary_arg = ptr->x_ix86_incoming_stack_boundary_arg;
 799   opts->x_ix86_pmode = ptr->x_ix86_pmode;
 800   opts->x_ix86_preferred_stack_boundary_arg = ptr->x_ix86_preferred_stack_boundary_arg;
 801   opts->x_ix86_recip_name = ptr->x_ix86_recip_name;
 802   opts->x_ix86_regparm = ptr->x_ix86_regparm;
 803   opts->x_ix86_section_threshold = ptr->x_ix86_section_threshold;
 804   opts->x_ix86_sse2avx = ptr->x_ix86_sse2avx;
 805   opts->x_ix86_stack_protector_guard = ptr->x_ix86_stack_protector_guard;
 806   opts->x_ix86_stringop_alg = ptr->x_ix86_stringop_alg;
 807   opts->x_ix86_tls_dialect = ptr->x_ix86_tls_dialect;
 808   opts->x_ix86_tune_ctrl_string = ptr->x_ix86_tune_ctrl_string;
 809   opts->x_ix86_tune_memcpy_strategy = ptr->x_ix86_tune_memcpy_strategy;
 810   opts->x_ix86_tune_memset_strategy = ptr->x_ix86_tune_memset_strategy;
 811   opts->x_ix86_tune_no_default = ptr->x_ix86_tune_no_default;
 812   opts->x_ix86_veclibabi_type = ptr->x_ix86_veclibabi_type;
 813   ix86_tune_cost = processor_cost_table[ix86_tune];
 814   /* TODO: ix86_cost should be chosen at instruction or function granuality
 815      so for cold code we use size_cost even in !optimize_size compilation.  */
 816   if (opts->x_optimize_size)
 817     ix86_cost = &ix86_size_cost;
 818   else
 819     ix86_cost = ix86_tune_cost;
 820
 821   /* Recreate the arch feature tests if the arch changed */
 822   if (old_arch != ix86_arch)
 823     {
 824       ix86_arch_mask = HOST_WIDE_INT_1U << ix86_arch;
 825       for (i = 0; i < X86_ARCH_LAST; ++i)
 826         ix86_arch_features[i]
 827           = !!(initial_ix86_arch_features[i] & ix86_arch_mask);
 828     }
 829
 830   /* Recreate the tune optimization tests */
 831   if (old_tune != ix86_tune)
 832     set_ix86_tune_features (opts, ix86_tune, false);
 833 }
 834
 835 /* Adjust target options after streaming them in.  This is mainly about
 836    reconciling them with global options.  */
 837
 838 void
 839 ix86_function_specific_post_stream_in (struct cl_target_option *ptr)
 840 {
 841   /* flag_pic is a global option, but ix86_cmodel is target saved option
 842      partly computed from flag_pic.  If flag_pic is on, adjust x_ix86_cmodel
 843      for PIC, or error out.  */
 844   if (flag_pic)
 845     switch (ptr->x_ix86_cmodel)
 846       {
 847       case CM_SMALL:
 848         ptr->x_ix86_cmodel = CM_SMALL_PIC;
 849         break;
 850
 851       case CM_MEDIUM:
 852         ptr->x_ix86_cmodel = CM_MEDIUM_PIC;
 853         break;
 854
 855       case CM_LARGE:
 856         ptr->x_ix86_cmodel = CM_LARGE_PIC;
 857         break;
 858
 859       case CM_KERNEL:
 860         error ("code model %s does not support PIC mode", "kernel");
 861         break;
 862
 863       default:
 864         break;
 865       }
 866   else
 867     switch (ptr->x_ix86_cmodel)
 868       {
 869       case CM_SMALL_PIC:
 870         ptr->x_ix86_cmodel = CM_SMALL;
 871         break;
 872
 873       case CM_MEDIUM_PIC:
 874         ptr->x_ix86_cmodel = CM_MEDIUM;
 875         break;
 876
 877       case CM_LARGE_PIC:
 878         ptr->x_ix86_cmodel = CM_LARGE;
 879         break;
 880
 881       default:
 882         break;
 883       }
 884 }
 885
 886 /* Print the current options */
 887
 888 void
 889 ix86_function_specific_print (FILE *file, int indent,
 890                               struct cl_target_option *ptr)
 891 {
 892   char *target_string
 893     = ix86_target_string (ptr->x_ix86_isa_flags, ptr->x_ix86_isa_flags2,
 894                           ptr->x_target_flags, ptr->x_ix86_target_flags,
 895                           NULL, NULL, ptr->x_ix86_fpmath,
 896                           ptr->x_prefer_vector_width_type, false, true);
 897
 898   gcc_assert (ptr->arch < PROCESSOR_max);
 899   fprintf (file, "%*sarch = %d (%s)\n",
 900            indent, "",
 901            ptr->arch, processor_names[ptr->arch]);
 902
 903   gcc_assert (ptr->tune < PROCESSOR_max);
 904   fprintf (file, "%*stune = %d (%s)\n",
 905            indent, "",
 906            ptr->tune, processor_names[ptr->tune]);
 907
 908   fprintf (file, "%*sbranch_cost = %d\n", indent, "", ptr->branch_cost);
 909
 910   if (target_string)
 911     {
 912       fprintf (file, "%*s%s\n", indent, "", target_string);
 913       free (target_string);
 914     }
 915 }
 916
 917 \f
 918 /* Inner function to process the attribute((target(...))), take an argument and
 919    set the current options from the argument. If we have a list, recursively go
 920    over the list.  */
 921
 922 static bool
 923 ix86_valid_target_attribute_inner_p (tree fndecl, tree args, char *p_strings[],
 924                                      struct gcc_options *opts,
 925                                      struct gcc_options *opts_set,
 926                                      struct gcc_options *enum_opts_set,
 927                                      bool target_clone_attr)
 928 {
 929   char *next_optstr;
 930   bool ret = true;
 931
 932 #define IX86_ATTR_ISA(S,O)   { S, sizeof (S)-1, ix86_opt_isa, O, 0 }
 933 #define IX86_ATTR_STR(S,O)   { S, sizeof (S)-1, ix86_opt_str, O, 0 }
 934 #define IX86_ATTR_ENUM(S,O)  { S, sizeof (S)-1, ix86_opt_enum, O, 0 }
 935 #define IX86_ATTR_YES(S,O,M) { S, sizeof (S)-1, ix86_opt_yes, O, M }
 936 #define IX86_ATTR_NO(S,O,M)  { S, sizeof (S)-1, ix86_opt_no,  O, M }
 937 #define IX86_ATTR_IX86_YES(S,O,M) \
 938   { S, sizeof (S)-1, ix86_opt_ix86_yes, O, M }
 939 #define IX86_ATTR_IX86_NO(S,O,M) \
 940   { S, sizeof (S)-1, ix86_opt_ix86_no,  O, M }
 941
 942   enum ix86_opt_type
 943   {
 944     ix86_opt_unknown,
 945     ix86_opt_yes,
 946     ix86_opt_no,
 947     ix86_opt_ix86_yes,
 948     ix86_opt_ix86_no,
 949     ix86_opt_str,
 950     ix86_opt_enum,
 951     ix86_opt_isa
 952   };
 953
 954   static const struct
 955   {
 956     const char *string;
 957     size_t len;
 958     enum ix86_opt_type type;
 959     int opt;
 960     int mask;
 961   } attrs[] = {
 962     /* isa options */
 963     IX86_ATTR_ISA ("pconfig",   OPT_mpconfig),
 964     IX86_ATTR_ISA ("wbnoinvd",  OPT_mwbnoinvd),
 965     IX86_ATTR_ISA ("sgx",       OPT_msgx),
 966     IX86_ATTR_ISA ("avx5124fmaps", OPT_mavx5124fmaps),
 967     IX86_ATTR_ISA ("avx5124vnniw", OPT_mavx5124vnniw),
 968     IX86_ATTR_ISA ("avx512vpopcntdq", OPT_mavx512vpopcntdq),
 969     IX86_ATTR_ISA ("avx512vbmi2", OPT_mavx512vbmi2),
 970     IX86_ATTR_ISA ("avx512vnni", OPT_mavx512vnni),
 971     IX86_ATTR_ISA ("avx512bitalg", OPT_mavx512bitalg),
 972     IX86_ATTR_ISA ("avx512vp2intersect", OPT_mavx512vp2intersect),
 973
 974     IX86_ATTR_ISA ("avx512vbmi", OPT_mavx512vbmi),
 975     IX86_ATTR_ISA ("avx512ifma", OPT_mavx512ifma),
 976     IX86_ATTR_ISA ("avx512vl",  OPT_mavx512vl),
 977     IX86_ATTR_ISA ("avx512bw",  OPT_mavx512bw),
 978     IX86_ATTR_ISA ("avx512dq",  OPT_mavx512dq),
 979     IX86_ATTR_ISA ("avx512er",  OPT_mavx512er),
 980     IX86_ATTR_ISA ("avx512pf",  OPT_mavx512pf),
 981     IX86_ATTR_ISA ("avx512cd",  OPT_mavx512cd),
 982     IX86_ATTR_ISA ("avx512f",   OPT_mavx512f),
 983     IX86_ATTR_ISA ("avx2",      OPT_mavx2),
 984     IX86_ATTR_ISA ("fma",       OPT_mfma),
 985     IX86_ATTR_ISA ("xop",       OPT_mxop),
 986     IX86_ATTR_ISA ("fma4",      OPT_mfma4),
 987     IX86_ATTR_ISA ("f16c",      OPT_mf16c),
 988     IX86_ATTR_ISA ("avx",       OPT_mavx),
 989     IX86_ATTR_ISA ("sse4",      OPT_msse4),
 990     IX86_ATTR_ISA ("sse4.2",    OPT_msse4_2),
 991     IX86_ATTR_ISA ("sse4.1",    OPT_msse4_1),
 992     IX86_ATTR_ISA ("sse4a",     OPT_msse4a),
 993     IX86_ATTR_ISA ("ssse3",     OPT_mssse3),
 994     IX86_ATTR_ISA ("sse3",      OPT_msse3),
 995     IX86_ATTR_ISA ("aes",       OPT_maes),
 996     IX86_ATTR_ISA ("sha",       OPT_msha),
 997     IX86_ATTR_ISA ("pclmul",    OPT_mpclmul),
 998     IX86_ATTR_ISA ("sse2",      OPT_msse2),
 999     IX86_ATTR_ISA ("sse",       OPT_msse),
1000     IX86_ATTR_ISA ("3dnowa",    OPT_m3dnowa),
1001     IX86_ATTR_ISA ("3dnow",     OPT_m3dnow),
1002     IX86_ATTR_ISA ("mmx",       OPT_mmmx),
1003     IX86_ATTR_ISA ("rtm",       OPT_mrtm),
1004     IX86_ATTR_ISA ("prfchw",    OPT_mprfchw),
1005     IX86_ATTR_ISA ("rdseed",    OPT_mrdseed),
1006     IX86_ATTR_ISA ("adx",       OPT_madx),
1007     IX86_ATTR_ISA ("prefetchwt1", OPT_mprefetchwt1),
1008     IX86_ATTR_ISA ("clflushopt", OPT_mclflushopt),
1009     IX86_ATTR_ISA ("xsaves",    OPT_mxsaves),
1010     IX86_ATTR_ISA ("xsavec",    OPT_mxsavec),
1011     IX86_ATTR_ISA ("xsaveopt",  OPT_mxsaveopt),
1012     IX86_ATTR_ISA ("xsave",     OPT_mxsave),
1013     IX86_ATTR_ISA ("abm",       OPT_mabm),
1014     IX86_ATTR_ISA ("bmi",       OPT_mbmi),
1015     IX86_ATTR_ISA ("bmi2",      OPT_mbmi2),
1016     IX86_ATTR_ISA ("lzcnt",     OPT_mlzcnt),
1017     IX86_ATTR_ISA ("tbm",       OPT_mtbm),
1018     IX86_ATTR_ISA ("popcnt",    OPT_mpopcnt),
1019     IX86_ATTR_ISA ("cx16",      OPT_mcx16),
1020     IX86_ATTR_ISA ("sahf",      OPT_msahf),
1021     IX86_ATTR_ISA ("movbe",     OPT_mmovbe),
1022     IX86_ATTR_ISA ("crc32",     OPT_mcrc32),
1023     IX86_ATTR_ISA ("fsgsbase",  OPT_mfsgsbase),
1024     IX86_ATTR_ISA ("rdrnd",     OPT_mrdrnd),
1025     IX86_ATTR_ISA ("mwaitx",    OPT_mmwaitx),
1026     IX86_ATTR_ISA ("clzero",    OPT_mclzero),
1027     IX86_ATTR_ISA ("pku",       OPT_mpku),
1028     IX86_ATTR_ISA ("lwp",       OPT_mlwp),
1029     IX86_ATTR_ISA ("hle",       OPT_mhle),
1030     IX86_ATTR_ISA ("fxsr",      OPT_mfxsr),
1031     IX86_ATTR_ISA ("clwb",      OPT_mclwb),
1032     IX86_ATTR_ISA ("rdpid",     OPT_mrdpid),
1033     IX86_ATTR_ISA ("gfni",      OPT_mgfni),
1034     IX86_ATTR_ISA ("shstk",     OPT_mshstk),
1035     IX86_ATTR_ISA ("vaes",      OPT_mvaes),
1036     IX86_ATTR_ISA ("vpclmulqdq", OPT_mvpclmulqdq),
1037     IX86_ATTR_ISA ("movdiri", OPT_mmovdiri),
1038     IX86_ATTR_ISA ("movdir64b", OPT_mmovdir64b),
1039     IX86_ATTR_ISA ("waitpkg", OPT_mwaitpkg),
1040     IX86_ATTR_ISA ("cldemote", OPT_mcldemote),
1041     IX86_ATTR_ISA ("uintr", OPT_muintr),
1042     IX86_ATTR_ISA ("ptwrite",   OPT_mptwrite),
1043     IX86_ATTR_ISA ("kl", OPT_mkl),
1044     IX86_ATTR_ISA ("widekl",    OPT_mwidekl),
1045     IX86_ATTR_ISA ("avx512bf16",   OPT_mavx512bf16),
1046     IX86_ATTR_ISA ("enqcmd", OPT_menqcmd),
1047     IX86_ATTR_ISA ("serialize", OPT_mserialize),
1048     IX86_ATTR_ISA ("tsxldtrk", OPT_mtsxldtrk),
1049     IX86_ATTR_ISA ("amx-tile", OPT_mamx_tile),
1050     IX86_ATTR_ISA ("amx-int8", OPT_mamx_int8),
1051     IX86_ATTR_ISA ("amx-bf16", OPT_mamx_bf16),
1052     IX86_ATTR_ISA ("hreset", OPT_mhreset),
1053     IX86_ATTR_ISA ("avxvnni",   OPT_mavxvnni),
1054
1055     /* enum options */
1056     IX86_ATTR_ENUM ("fpmath=",  OPT_mfpmath_),
1057     IX86_ATTR_ENUM ("prefer-vector-width=", OPT_mprefer_vector_width_),
1058
1059     /* string options */
1060     IX86_ATTR_STR ("arch=",     IX86_FUNCTION_SPECIFIC_ARCH),
1061     IX86_ATTR_STR ("tune=",     IX86_FUNCTION_SPECIFIC_TUNE),
1062
1063     /* flag options */
1064     IX86_ATTR_YES ("cld",
1065                    OPT_mcld,
1066                    MASK_CLD),
1067
1068     IX86_ATTR_NO ("fancy-math-387",
1069                   OPT_mfancy_math_387,
1070                   MASK_NO_FANCY_MATH_387),
1071
1072     IX86_ATTR_YES ("ieee-fp",
1073                    OPT_mieee_fp,
1074                    MASK_IEEE_FP),
1075
1076     IX86_ATTR_YES ("inline-all-stringops",
1077                    OPT_minline_all_stringops,
1078                    MASK_INLINE_ALL_STRINGOPS),
1079
1080     IX86_ATTR_YES ("inline-stringops-dynamically",
1081                    OPT_minline_stringops_dynamically,
1082                    MASK_INLINE_STRINGOPS_DYNAMICALLY),
1083
1084     IX86_ATTR_NO ("align-stringops",
1085                   OPT_mno_align_stringops,
1086                   MASK_NO_ALIGN_STRINGOPS),
1087
1088     IX86_ATTR_YES ("recip",
1089                    OPT_mrecip,
1090                    MASK_RECIP),
1091
1092     IX86_ATTR_IX86_YES ("general-regs-only",
1093                         OPT_mgeneral_regs_only,
1094                         OPTION_MASK_GENERAL_REGS_ONLY),
1095   };
1096
1097   location_t loc
1098     = fndecl == NULL ? UNKNOWN_LOCATION : DECL_SOURCE_LOCATION (fndecl);
1099   const char *attr_name = target_clone_attr ? "target_clone" : "target";
1100
1101   /* If this is a list, recurse to get the options.  */
1102   if (TREE_CODE (args) == TREE_LIST)
1103     {
1104       bool ret = true;
1105
1106       for (; args; args = TREE_CHAIN (args))
1107         if (TREE_VALUE (args)
1108             && !ix86_valid_target_attribute_inner_p (fndecl, TREE_VALUE (args),
1109                                                      p_strings, opts, opts_set,
1110                                                      enum_opts_set,
1111                                                      target_clone_attr))
1112           ret = false;
1113
1114       return ret;
1115     }
1116
1117   else if (TREE_CODE (args) != STRING_CST)
1118     {
1119       error_at (loc, "attribute %qs argument is not a string", attr_name);
1120       return false;
1121     }
1122
1123   /* Handle multiple arguments separated by commas.  */
1124   next_optstr = ASTRDUP (TREE_STRING_POINTER (args));
1125
1126   while (next_optstr && *next_optstr != '\0')
1127     {
1128       char *p = next_optstr;
1129       char *orig_p = p;
1130       char *comma = strchr (next_optstr, ',');
1131       size_t len, opt_len;
1132       int opt;
1133       bool opt_set_p;
1134       char ch;
1135       unsigned i;
1136       enum ix86_opt_type type = ix86_opt_unknown;
1137       int mask = 0;
1138
1139       if (comma)
1140         {
1141           *comma = '\0';
1142           len = comma - next_optstr;
1143           next_optstr = comma + 1;
1144         }
1145       else
1146         {
1147           len = strlen (p);
1148           next_optstr = NULL;
1149         }
1150
1151       /* Recognize no-xxx.  */
1152       if (len > 3 && p[0] == 'n' && p[1] == 'o' && p[2] == '-')
1153         {
1154           opt_set_p = false;
1155           p += 3;
1156           len -= 3;
1157         }
1158       else
1159         opt_set_p = true;
1160
1161       /* Find the option.  */
1162       ch = *p;
1163       opt = N_OPTS;
1164       for (i = 0; i < ARRAY_SIZE (attrs); i++)
1165         {
1166           type = attrs[i].type;
1167           opt_len = attrs[i].len;
1168           if (ch == attrs[i].string[0]
1169               && ((type != ix86_opt_str && type != ix86_opt_enum)
1170                   ? len == opt_len
1171                   : len > opt_len)
1172               && memcmp (p, attrs[i].string, opt_len) == 0)
1173             {
1174               opt = attrs[i].opt;
1175               mask = attrs[i].mask;
1176               break;
1177             }
1178         }
1179
1180       /* Process the option.  */
1181       if (opt == N_OPTS)
1182         {
1183           error_at (loc, "attribute %qs argument %qs is unknown",
1184                     orig_p, attr_name);
1185           ret = false;
1186         }
1187
1188       else if (type == ix86_opt_isa)
1189         {
1190           struct cl_decoded_option decoded;
1191
1192           generate_option (opt, NULL, opt_set_p, CL_TARGET, &decoded);
1193           ix86_handle_option (opts, opts_set,
1194                               &decoded, input_location);
1195         }
1196
1197       else if (type == ix86_opt_yes || type == ix86_opt_no)
1198         {
1199           if (type == ix86_opt_no)
1200             opt_set_p = !opt_set_p;
1201
1202           if (opt_set_p)
1203             opts->x_target_flags |= mask;
1204           else
1205             opts->x_target_flags &= ~mask;
1206         }
1207
1208       else if (type == ix86_opt_ix86_yes || type == ix86_opt_ix86_no)
1209         {
1210           if (mask == OPTION_MASK_GENERAL_REGS_ONLY)
1211             {
1212               if (!opt_set_p)
1213                 {
1214                   error_at (loc, "pragma or attribute %<target(\"%s\")%> "
1215                             "does not allow a negated form", p);
1216                   return false;
1217                 }
1218
1219               if (type != ix86_opt_ix86_yes)
1220                 gcc_unreachable ();
1221
1222               opts->x_ix86_target_flags |= mask;
1223
1224               struct cl_decoded_option decoded;
1225               generate_option (opt, NULL, opt_set_p, CL_TARGET,
1226                                &decoded);
1227               ix86_handle_option (opts, opts_set, &decoded,
1228                                   input_location);
1229             }
1230           else
1231             {
1232               if (type == ix86_opt_ix86_no)
1233                 opt_set_p = !opt_set_p;
1234
1235               if (opt_set_p)
1236                 opts->x_ix86_target_flags |= mask;
1237               else
1238                 opts->x_ix86_target_flags &= ~mask;
1239             }
1240         }
1241
1242       else if (type == ix86_opt_str)
1243         {
1244           if (p_strings[opt])
1245             {
1246               error_at (loc, "attribute value %qs was already specified "
1247                         "in %qs attribute", orig_p, attr_name);
1248               ret = false;
1249             }
1250           else
1251             {
1252               p_strings[opt] = xstrdup (p + opt_len);
1253               if (opt == IX86_FUNCTION_SPECIFIC_ARCH)
1254                 {
1255                   /* If arch= is set,  clear all bits in x_ix86_isa_flags,
1256                      except for ISA_64BIT, ABI_64, ABI_X32, and CODE16
1257                      and all bits in x_ix86_isa_flags2.  */
1258                   opts->x_ix86_isa_flags &= (OPTION_MASK_ISA_64BIT
1259                                              | OPTION_MASK_ABI_64
1260                                              | OPTION_MASK_ABI_X32
1261                                              | OPTION_MASK_CODE16);
1262                   opts->x_ix86_isa_flags_explicit &= (OPTION_MASK_ISA_64BIT
1263                                                       | OPTION_MASK_ABI_64
1264                                                       | OPTION_MASK_ABI_X32
1265                                                       | OPTION_MASK_CODE16);
1266                   opts->x_ix86_isa_flags2 = 0;
1267                   opts->x_ix86_isa_flags2_explicit = 0;
1268                 }
1269             }
1270         }
1271
1272       else if (type == ix86_opt_enum)
1273         {
1274           bool arg_ok;
1275           int value;
1276
1277           arg_ok = opt_enum_arg_to_value (opt, p + opt_len, &value, CL_TARGET);
1278           if (arg_ok)
1279             set_option (opts, enum_opts_set, opt, value,
1280                         p + opt_len, DK_UNSPECIFIED, input_location,
1281                         global_dc);
1282           else
1283             {
1284               error_at (loc, "attribute value %qs is unknown in %qs attribute",
1285                         orig_p, attr_name);
1286               ret = false;
1287             }
1288         }
1289
1290       else
1291         gcc_unreachable ();
1292     }
1293
1294   return ret;
1295 }
1296
1297 /* Release allocated strings.  */
1298 static void
1299 release_options_strings (char **option_strings)
1300 {
1301   /* Free up memory allocated to hold the strings */
1302   for (unsigned i = 0; i < IX86_FUNCTION_SPECIFIC_MAX; i++)
1303     free (option_strings[i]);
1304 }
1305
1306 /* Return a TARGET_OPTION_NODE tree of the target options listed or NULL.  */
1307
1308 tree
1309 ix86_valid_target_attribute_tree (tree fndecl, tree args,
1310                                   struct gcc_options *opts,
1311                                   struct gcc_options *opts_set,
1312                                   bool target_clone_attr)
1313 {
1314   const char *orig_arch_string = opts->x_ix86_arch_string;
1315   const char *orig_tune_string = opts->x_ix86_tune_string;
1316   enum fpmath_unit orig_fpmath_set = opts_set->x_ix86_fpmath;
1317   enum prefer_vector_width orig_pvw_set = opts_set->x_prefer_vector_width_type;
1318   int orig_tune_defaulted = ix86_tune_defaulted;
1319   int orig_arch_specified = ix86_arch_specified;
1320   char *option_strings[IX86_FUNCTION_SPECIFIC_MAX] = { NULL, NULL };
1321   tree t = NULL_TREE;
1322   struct cl_target_option *def
1323     = TREE_TARGET_OPTION (target_option_default_node);
1324   struct gcc_options enum_opts_set;
1325
1326   memset (&enum_opts_set, 0, sizeof (enum_opts_set));
1327
1328   /* Process each of the options on the chain.  */
1329   if (!ix86_valid_target_attribute_inner_p (fndecl, args, option_strings, opts,
1330                                             opts_set, &enum_opts_set,
1331                                             target_clone_attr))
1332     return error_mark_node;
1333
1334   /* If the changed options are different from the default, rerun
1335      ix86_option_override_internal, and then save the options away.
1336      The string options are attribute options, and will be undone
1337      when we copy the save structure.  */
1338   if (opts->x_ix86_isa_flags != def->x_ix86_isa_flags
1339       || opts->x_ix86_isa_flags2 != def->x_ix86_isa_flags2
1340       || opts->x_target_flags != def->x_target_flags
1341       || option_strings[IX86_FUNCTION_SPECIFIC_ARCH]
1342       || option_strings[IX86_FUNCTION_SPECIFIC_TUNE]
1343       || enum_opts_set.x_ix86_fpmath
1344       || enum_opts_set.x_prefer_vector_width_type)
1345     {
1346       /* If we are using the default tune= or arch=, undo the string assigned,
1347          and use the default.  */
1348       if (option_strings[IX86_FUNCTION_SPECIFIC_ARCH])
1349         opts->x_ix86_arch_string
1350           = ggc_strdup (option_strings[IX86_FUNCTION_SPECIFIC_ARCH]);
1351       else if (!orig_arch_specified)
1352         opts->x_ix86_arch_string = NULL;
1353
1354       if (option_strings[IX86_FUNCTION_SPECIFIC_TUNE])
1355         opts->x_ix86_tune_string
1356           = ggc_strdup (option_strings[IX86_FUNCTION_SPECIFIC_TUNE]);
1357       else if (orig_tune_defaulted)
1358         opts->x_ix86_tune_string = NULL;
1359
1360       /* If fpmath= is not set, and we now have sse2 on 32-bit, use it.  */
1361       if (enum_opts_set.x_ix86_fpmath)
1362         opts_set->x_ix86_fpmath = (enum fpmath_unit) 1;
1363       if (enum_opts_set.x_prefer_vector_width_type)
1364         opts_set->x_prefer_vector_width_type = (enum prefer_vector_width) 1;
1365
1366       /* Do any overrides, such as arch=xxx, or tune=xxx support.  */
1367       bool r = ix86_option_override_internal (false, opts, opts_set);
1368       if (!r)
1369         {
1370           release_options_strings (option_strings);
1371           return error_mark_node;
1372         }
1373
1374       /* Add any builtin functions with the new isa if any.  */
1375       ix86_add_new_builtins (opts->x_ix86_isa_flags, opts->x_ix86_isa_flags2);
1376
1377       /* Save the current options unless we are validating options for
1378          #pragma.  */
1379       t = build_target_option_node (opts, opts_set);
1380
1381       opts->x_ix86_arch_string = orig_arch_string;
1382       opts->x_ix86_tune_string = orig_tune_string;
1383       opts_set->x_ix86_fpmath = orig_fpmath_set;
1384       opts_set->x_prefer_vector_width_type = orig_pvw_set;
1385
1386       release_options_strings (option_strings);
1387     }
1388
1389   return t;
1390 }
1391
1392 /* Hook to validate attribute((target("string"))).  */
1393
1394 bool
1395 ix86_valid_target_attribute_p (tree fndecl,
1396                                tree ARG_UNUSED (name),
1397                                tree args,
1398                                int flags)
1399 {
1400   struct gcc_options func_options, func_options_set;
1401   tree new_target, new_optimize;
1402   bool ret = true;
1403
1404   /* attribute((target("default"))) does nothing, beyond
1405      affecting multi-versioning.  */
1406   if (TREE_VALUE (args)
1407       && TREE_CODE (TREE_VALUE (args)) == STRING_CST
1408       && TREE_CHAIN (args) == NULL_TREE
1409       && strcmp (TREE_STRING_POINTER (TREE_VALUE (args)), "default") == 0)
1410     return true;
1411
1412   tree old_optimize = build_optimization_node (&global_options,
1413                                                &global_options_set);
1414
1415   /* Get the optimization options of the current function.  */
1416   tree func_optimize = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (fndecl);
1417
1418   if (!func_optimize)
1419     func_optimize = old_optimize;
1420
1421   /* Init func_options.  */
1422   memset (&func_options, 0, sizeof (func_options));
1423   init_options_struct (&func_options, NULL);
1424   lang_hooks.init_options_struct (&func_options);
1425   memset (&func_options_set, 0, sizeof (func_options_set));
1426
1427   cl_optimization_restore (&func_options, &func_options_set,
1428                            TREE_OPTIMIZATION (func_optimize));
1429
1430   /* Initialize func_options to the default before its target options can
1431      be set.  */
1432   cl_target_option_restore (&func_options, &func_options_set,
1433                             TREE_TARGET_OPTION (target_option_default_node));
1434
1435   /* FLAGS == 1 is used for target_clones attribute.  */
1436   new_target
1437     = ix86_valid_target_attribute_tree (fndecl, args, &func_options,
1438                                         &func_options_set, flags == 1);
1439
1440   new_optimize = build_optimization_node (&func_options, &func_options_set);
1441
1442   if (new_target == error_mark_node)
1443     ret = false;
1444
1445   else if (fndecl && new_target)
1446     {
1447       DECL_FUNCTION_SPECIFIC_TARGET (fndecl) = new_target;
1448
1449       if (old_optimize != new_optimize)
1450         DECL_FUNCTION_SPECIFIC_OPTIMIZATION (fndecl) = new_optimize;
1451     }
1452
1453   return ret;
1454 }
1455
1456 const char *stringop_alg_names[] = {
1457 #define DEF_ENUM
1458 #define DEF_ALG(alg, name) #name,
1459 #include "stringop.def"
1460 #undef DEF_ENUM
1461 #undef DEF_ALG
1462 };
1463
1464 /* Parse parameter string passed to -mmemcpy-strategy= or -mmemset-strategy=.
1465    The string is of the following form (or comma separated list of it):
1466
1467      strategy_alg:max_size:[align|noalign]
1468
1469    where the full size range for the strategy is either [0, max_size] or
1470    [min_size, max_size], in which min_size is the max_size + 1 of the
1471    preceding range.  The last size range must have max_size == -1.
1472
1473    Examples:
1474
1475     1.
1476        -mmemcpy-strategy=libcall:-1:noalign
1477
1478       this is equivalent to (for known size memcpy) -mstringop-strategy=libcall
1479
1480
1481    2.
1482       -mmemset-strategy=rep_8byte:16:noalign,vector_loop:2048:align,libcall:-1:noalign
1483
1484       This is to tell the compiler to use the following strategy for memset
1485       1) when the expected size is between [1, 16], use rep_8byte strategy;
1486       2) when the size is between [17, 2048], use vector_loop;
1487       3) when the size is > 2048, use libcall.  */
1488
1489 struct stringop_size_range
1490 {
1491   int max;
1492   stringop_alg alg;
1493   bool noalign;
1494 };
1495
1496 static void
1497 ix86_parse_stringop_strategy_string (char *strategy_str, bool is_memset)
1498 {
1499   const struct stringop_algs *default_algs;
1500   stringop_size_range input_ranges[MAX_STRINGOP_ALGS];
1501   char *curr_range_str, *next_range_str;
1502   const char *opt = is_memset ? "-mmemset_strategy=" : "-mmemcpy_strategy=";
1503   int i = 0, n = 0;
1504
1505   if (is_memset)
1506     default_algs = &ix86_cost->memset[TARGET_64BIT != 0];
1507   else
1508     default_algs = &ix86_cost->memcpy[TARGET_64BIT != 0];
1509
1510   curr_range_str = strategy_str;
1511
1512   do
1513     {
1514       int maxs;
1515       char alg_name[128];
1516       char align[16];
1517       next_range_str = strchr (curr_range_str, ',');
1518       if (next_range_str)
1519         *next_range_str++ = '\0';
1520
1521       if (sscanf (curr_range_str, "%20[^:]:%d:%10s", alg_name, &maxs,
1522                   align) != 3)
1523         {
1524           error ("wrong argument %qs to option %qs", curr_range_str, opt);
1525           return;
1526         }
1527
1528       if (n > 0 && (maxs < (input_ranges[n - 1].max + 1) && maxs != -1))
1529         {
1530           error ("size ranges of option %qs should be increasing", opt);
1531           return;
1532         }
1533
1534       for (i = 0; i < last_alg; i++)
1535         if (!strcmp (alg_name, stringop_alg_names[i]))
1536           break;
1537
1538       if (i == last_alg)
1539         {
1540           error ("wrong strategy name %qs specified for option %qs",
1541                  alg_name, opt);
1542
1543           auto_vec <const char *> candidates;
1544           for (i = 0; i < last_alg; i++)
1545             if ((stringop_alg) i != rep_prefix_8_byte || TARGET_64BIT)
1546               candidates.safe_push (stringop_alg_names[i]);
1547
1548           char *s;
1549           const char *hint
1550             = candidates_list_and_hint (alg_name, s, candidates);
1551           if (hint)
1552             inform (input_location,
1553                     "valid arguments to %qs are: %s; did you mean %qs?",
1554                     opt, s, hint);
1555           else
1556             inform (input_location, "valid arguments to %qs are: %s",
1557                     opt, s);
1558           XDELETEVEC (s);
1559           return;
1560         }
1561
1562       if ((stringop_alg) i == rep_prefix_8_byte
1563           && !TARGET_64BIT)
1564         {
1565           /* rep; movq isn't available in 32-bit code.  */
1566           error ("strategy name %qs specified for option %qs "
1567                  "not supported for 32-bit code", alg_name, opt);
1568           return;
1569         }
1570
1571       input_ranges[n].max = maxs;
1572       input_ranges[n].alg = (stringop_alg) i;
1573       if (!strcmp (align, "align"))
1574         input_ranges[n].noalign = false;
1575       else if (!strcmp (align, "noalign"))
1576         input_ranges[n].noalign = true;
1577       else
1578         {
1579           error ("unknown alignment %qs specified for option %qs", align, opt);
1580           return;
1581         }
1582       n++;
1583       curr_range_str = next_range_str;
1584     }
1585   while (curr_range_str);
1586
1587   if (input_ranges[n - 1].max != -1)
1588     {
1589       error ("the max value for the last size range should be -1"
1590              " for option %qs", opt);
1591       return;
1592     }
1593
1594   if (n > MAX_STRINGOP_ALGS)
1595     {
1596       error ("too many size ranges specified in option %qs", opt);
1597       return;
1598     }
1599
1600   /* Now override the default algs array.  */
1601   for (i = 0; i < n; i++)
1602     {
1603       *const_cast<int *>(&default_algs->size[i].max) = input_ranges[i].max;
1604       *const_cast<stringop_alg *>(&default_algs->size[i].alg)
1605           = input_ranges[i].alg;
1606       *const_cast<int *>(&default_algs->size[i].noalign)
1607           = input_ranges[i].noalign;
1608     }
1609 }
1610
1611 \f
1612 /* parse -mtune-ctrl= option. When DUMP is true,
1613    print the features that are explicitly set.  */
1614
1615 static void
1616 parse_mtune_ctrl_str (struct gcc_options *opts, bool dump)
1617 {
1618   if (!opts->x_ix86_tune_ctrl_string)
1619     return;
1620
1621   char *next_feature_string = NULL;
1622   char *curr_feature_string = xstrdup (opts->x_ix86_tune_ctrl_string);
1623   char *orig = curr_feature_string;
1624   int i;
1625   do
1626     {
1627       bool clear = false;
1628
1629       next_feature_string = strchr (curr_feature_string, ',');
1630       if (next_feature_string)
1631         *next_feature_string++ = '\0';
1632       if (*curr_feature_string == '^')
1633         {
1634           curr_feature_string++;
1635           clear = true;
1636         }
1637       for (i = 0; i < X86_TUNE_LAST; i++)
1638         {
1639           if (!strcmp (curr_feature_string, ix86_tune_feature_names[i]))
1640             {
1641               ix86_tune_features[i] = !clear;
1642               if (dump)
1643                 fprintf (stderr, "Explicitly %s feature %s\n",
1644                          clear ? "clear" : "set", ix86_tune_feature_names[i]);
1645               break;
1646             }
1647         }
1648       if (i == X86_TUNE_LAST)
1649         error ("unknown parameter to option %<-mtune-ctrl%>: %s",
1650                clear ? curr_feature_string - 1 : curr_feature_string);
1651       curr_feature_string = next_feature_string;
1652     }
1653   while (curr_feature_string);
1654   free (orig);
1655 }
1656
1657 /* Helper function to set ix86_tune_features. IX86_TUNE is the
1658    processor type.  */
1659
1660 static void
1661 set_ix86_tune_features (struct gcc_options *opts,
1662                         enum processor_type ix86_tune, bool dump)
1663 {
1664   unsigned HOST_WIDE_INT ix86_tune_mask = HOST_WIDE_INT_1U << ix86_tune;
1665   int i;
1666
1667   for (i = 0; i < X86_TUNE_LAST; ++i)
1668     {
1669       if (ix86_tune_no_default)
1670         ix86_tune_features[i] = 0;
1671       else
1672         ix86_tune_features[i]
1673           = !!(initial_ix86_tune_features[i] & ix86_tune_mask);
1674     }
1675
1676   if (dump)
1677     {
1678       fprintf (stderr, "List of x86 specific tuning parameter names:\n");
1679       for (i = 0; i < X86_TUNE_LAST; i++)
1680         fprintf (stderr, "%s : %s\n", ix86_tune_feature_names[i],
1681                  ix86_tune_features[i] ? "on" : "off");
1682     }
1683
1684   parse_mtune_ctrl_str (opts, dump);
1685 }
1686
1687
1688 /* Default align_* from the processor table.  */
1689
1690 static void
1691 ix86_default_align (struct gcc_options *opts)
1692 {
1693   /* -falign-foo without argument: supply one.  */
1694   if (opts->x_flag_align_loops && !opts->x_str_align_loops)
1695     opts->x_str_align_loops = processor_cost_table[ix86_tune]->align_loop;
1696   if (opts->x_flag_align_jumps && !opts->x_str_align_jumps)
1697     opts->x_str_align_jumps = processor_cost_table[ix86_tune]->align_jump;
1698   if (opts->x_flag_align_labels && !opts->x_str_align_labels)
1699     opts->x_str_align_labels = processor_cost_table[ix86_tune]->align_label;
1700   if (opts->x_flag_align_functions && !opts->x_str_align_functions)
1701     opts->x_str_align_functions = processor_cost_table[ix86_tune]->align_func;
1702 }
1703
1704 #ifndef USE_IX86_FRAME_POINTER
1705 #define USE_IX86_FRAME_POINTER 0
1706 #endif
1707
1708 /* (Re)compute option overrides affected by optimization levels in
1709    target-specific ways.  */
1710
1711 static void
1712 ix86_recompute_optlev_based_flags (struct gcc_options *opts,
1713                                    struct gcc_options *opts_set)
1714 {
1715   /* Set the default values for switches whose default depends on TARGET_64BIT
1716      in case they weren't overwritten by command line options.  */
1717   if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
1718     {
1719       if (opts->x_optimize >= 1)
1720         SET_OPTION_IF_UNSET (opts, opts_set, flag_omit_frame_pointer,
1721                              !USE_IX86_FRAME_POINTER);
1722       if (opts->x_flag_asynchronous_unwind_tables
1723           && TARGET_64BIT_MS_ABI)
1724         SET_OPTION_IF_UNSET (opts, opts_set, flag_unwind_tables, 1);
1725       if (opts->x_flag_asynchronous_unwind_tables == 2)
1726         opts->x_flag_unwind_tables
1727           = opts->x_flag_asynchronous_unwind_tables = 1;
1728       if (opts->x_flag_pcc_struct_return == 2)
1729         opts->x_flag_pcc_struct_return = 0;
1730     }
1731   else
1732     {
1733       if (opts->x_optimize >= 1)
1734           SET_OPTION_IF_UNSET (opts, opts_set, flag_omit_frame_pointer,
1735                                !(USE_IX86_FRAME_POINTER || opts->x_optimize_size));
1736       if (opts->x_flag_asynchronous_unwind_tables == 2)
1737         opts->x_flag_asynchronous_unwind_tables = !USE_IX86_FRAME_POINTER;
1738       if (opts->x_flag_pcc_struct_return == 2)
1739         {
1740           /* Intel MCU psABI specifies that -freg-struct-return should
1741              be on.  Instead of setting DEFAULT_PCC_STRUCT_RETURN to 0,
1742              we check -miamcu so that -freg-struct-return is always
1743              turned on if -miamcu is used.  */
1744           if (TARGET_IAMCU_P (opts->x_target_flags))
1745             opts->x_flag_pcc_struct_return = 0;
1746           else
1747             opts->x_flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
1748         }
1749     }
1750 }
1751
1752 /* Implement TARGET_OVERRIDE_OPTIONS_AFTER_CHANGE hook.  */
1753
1754 void
1755 ix86_override_options_after_change (void)
1756 {
1757   ix86_default_align (&global_options);
1758   ix86_recompute_optlev_based_flags (&global_options, &global_options_set);
1759 }
1760
1761 /* Clear stack slot assignments remembered from previous functions.
1762    This is called from INIT_EXPANDERS once before RTL is emitted for each
1763    function.  */
1764
1765 static struct machine_function *
1766 ix86_init_machine_status (void)
1767 {
1768   struct machine_function *f;
1769
1770   f = ggc_cleared_alloc<machine_function> ();
1771   f->call_abi = ix86_abi;
1772   f->stack_frame_required = true;
1773
1774   return f;
1775 }
1776
1777 /* Override various settings based on options.  If MAIN_ARGS_P, the
1778    options are from the command line, otherwise they are from
1779    attributes.  Return true if there's an error related to march
1780    option.  */
1781
1782 static bool
1783 ix86_option_override_internal (bool main_args_p,
1784                                struct gcc_options *opts,
1785                                struct gcc_options *opts_set)
1786 {
1787   int i;
1788   unsigned HOST_WIDE_INT ix86_arch_mask;
1789   const bool ix86_tune_specified = (opts->x_ix86_tune_string != NULL);
1790
1791   /* -mrecip options.  */
1792   static struct
1793     {
1794       const char *string;           /* option name */
1795       unsigned int mask;            /* mask bits to set */
1796     }
1797   const recip_options[] =
1798     {
1799       { "all",       RECIP_MASK_ALL },
1800       { "none",      RECIP_MASK_NONE },
1801       { "div",       RECIP_MASK_DIV },
1802       { "sqrt",      RECIP_MASK_SQRT },
1803       { "vec-div",   RECIP_MASK_VEC_DIV },
1804       { "vec-sqrt",  RECIP_MASK_VEC_SQRT },
1805     };
1806
1807
1808   /* Turn off both OPTION_MASK_ABI_64 and OPTION_MASK_ABI_X32 if
1809      TARGET_64BIT_DEFAULT is true and TARGET_64BIT is false.  */
1810   if (TARGET_64BIT_DEFAULT && !TARGET_64BIT_P (opts->x_ix86_isa_flags))
1811     opts->x_ix86_isa_flags &= ~(OPTION_MASK_ABI_64 | OPTION_MASK_ABI_X32);
1812 #ifdef TARGET_BI_ARCH
1813   else
1814     {
1815 #if TARGET_BI_ARCH == 1
1816       /* When TARGET_BI_ARCH == 1, by default, OPTION_MASK_ABI_64
1817          is on and OPTION_MASK_ABI_X32 is off.  We turn off
1818          OPTION_MASK_ABI_64 if OPTION_MASK_ABI_X32 is turned on by
1819          -mx32.  */
1820       if (TARGET_X32_P (opts->x_ix86_isa_flags))
1821         opts->x_ix86_isa_flags &= ~OPTION_MASK_ABI_64;
1822 #else
1823       /* When TARGET_BI_ARCH == 2, by default, OPTION_MASK_ABI_X32 is
1824          on and OPTION_MASK_ABI_64 is off.  We turn off
1825          OPTION_MASK_ABI_X32 if OPTION_MASK_ABI_64 is turned on by
1826          -m64 or OPTION_MASK_CODE16 is turned on by -m16.  */
1827       if (TARGET_LP64_P (opts->x_ix86_isa_flags)
1828           || TARGET_16BIT_P (opts->x_ix86_isa_flags))
1829         opts->x_ix86_isa_flags &= ~OPTION_MASK_ABI_X32;
1830 #endif
1831       if (TARGET_64BIT_P (opts->x_ix86_isa_flags)
1832           && TARGET_IAMCU_P (opts->x_target_flags))
1833         sorry ("Intel MCU psABI isn%'t supported in %s mode",
1834                TARGET_X32_P (opts->x_ix86_isa_flags) ? "x32" : "64-bit");
1835     }
1836 #endif
1837
1838   if (TARGET_X32_P (opts->x_ix86_isa_flags))
1839     {
1840       /* Always turn on OPTION_MASK_ISA_64BIT and turn off
1841          OPTION_MASK_ABI_64 for TARGET_X32.  */
1842       opts->x_ix86_isa_flags |= OPTION_MASK_ISA_64BIT;
1843       opts->x_ix86_isa_flags &= ~OPTION_MASK_ABI_64;
1844     }
1845   else if (TARGET_16BIT_P (opts->x_ix86_isa_flags))
1846     opts->x_ix86_isa_flags &= ~(OPTION_MASK_ISA_64BIT
1847                                 | OPTION_MASK_ABI_X32
1848                                 | OPTION_MASK_ABI_64);
1849   else if (TARGET_LP64_P (opts->x_ix86_isa_flags))
1850     {
1851       /* Always turn on OPTION_MASK_ISA_64BIT and turn off
1852          OPTION_MASK_ABI_X32 for TARGET_LP64.  */
1853       opts->x_ix86_isa_flags |= OPTION_MASK_ISA_64BIT;
1854       opts->x_ix86_isa_flags &= ~OPTION_MASK_ABI_X32;
1855     }
1856
1857 #ifdef SUBTARGET_OVERRIDE_OPTIONS
1858   SUBTARGET_OVERRIDE_OPTIONS;
1859 #endif
1860
1861 #ifdef SUBSUBTARGET_OVERRIDE_OPTIONS
1862   SUBSUBTARGET_OVERRIDE_OPTIONS;
1863 #endif
1864
1865   /* -fPIC is the default for x86_64.  */
1866   if (TARGET_MACHO && TARGET_64BIT_P (opts->x_ix86_isa_flags))
1867     opts->x_flag_pic = 2;
1868
1869   /* Need to check -mtune=generic first.  */
1870   if (opts->x_ix86_tune_string)
1871     {
1872       /* As special support for cross compilers we read -mtune=native
1873              as -mtune=generic.  With native compilers we won't see the
1874              -mtune=native, as it was changed by the driver.  */
1875       if (!strcmp (opts->x_ix86_tune_string, "native"))
1876         {
1877           opts->x_ix86_tune_string = "generic";
1878         }
1879       else if (!strcmp (opts->x_ix86_tune_string, "x86-64"))
1880         warning (OPT_Wdeprecated,
1881                  main_args_p
1882                  ? G_("%<-mtune=x86-64%> is deprecated; use %<-mtune=k8%> "
1883                       "or %<-mtune=generic%> instead as appropriate")
1884                  : G_("%<target(\"tune=x86-64\")%> is deprecated; use "
1885                       "%<target(\"tune=k8\")%> or %<target(\"tune=generic\")%>"
1886                       " instead as appropriate"));
1887     }
1888   else
1889     {
1890       if (opts->x_ix86_arch_string)
1891         opts->x_ix86_tune_string = opts->x_ix86_arch_string;
1892       if (!opts->x_ix86_tune_string)
1893         {
1894           opts->x_ix86_tune_string = processor_names[TARGET_CPU_DEFAULT];
1895           ix86_tune_defaulted = 1;
1896         }
1897
1898       /* opts->x_ix86_tune_string is set to opts->x_ix86_arch_string
1899          or defaulted.  We need to use a sensible tune option.  */
1900       if (!strcmp (opts->x_ix86_tune_string, "x86-64"))
1901         {
1902           opts->x_ix86_tune_string = "generic";
1903         }
1904     }
1905
1906   if (opts->x_ix86_stringop_alg == rep_prefix_8_byte
1907       && !TARGET_64BIT_P (opts->x_ix86_isa_flags))
1908     {
1909       /* rep; movq isn't available in 32-bit code.  */
1910       error ("%<-mstringop-strategy=rep_8byte%> not supported for 32-bit code");
1911       opts->x_ix86_stringop_alg = no_stringop;
1912     }
1913
1914   if (TARGET_UINTR && !TARGET_64BIT)
1915     error ("%<-muintr%> not supported for 32-bit code");
1916
1917   if (!opts->x_ix86_arch_string)
1918     opts->x_ix86_arch_string
1919       = TARGET_64BIT_P (opts->x_ix86_isa_flags)
1920         ? "x86-64" : SUBTARGET32_DEFAULT_CPU;
1921   else
1922     ix86_arch_specified = 1;
1923
1924   if (opts_set->x_ix86_pmode)
1925     {
1926       if ((TARGET_LP64_P (opts->x_ix86_isa_flags)
1927            && opts->x_ix86_pmode == PMODE_SI)
1928           || (!TARGET_64BIT_P (opts->x_ix86_isa_flags)
1929                && opts->x_ix86_pmode == PMODE_DI))
1930         error ("address mode %qs not supported in the %s bit mode",
1931                TARGET_64BIT_P (opts->x_ix86_isa_flags) ? "short" : "long",
1932                TARGET_64BIT_P (opts->x_ix86_isa_flags) ? "64" : "32");
1933     }
1934   else
1935     opts->x_ix86_pmode = TARGET_LP64_P (opts->x_ix86_isa_flags)
1936                          ? PMODE_DI : PMODE_SI;
1937
1938   SET_OPTION_IF_UNSET (opts, opts_set, ix86_abi, DEFAULT_ABI);
1939
1940   if (opts->x_ix86_abi == MS_ABI && TARGET_X32_P (opts->x_ix86_isa_flags))
1941     error ("%<-mabi=ms%> not supported with X32 ABI");
1942   gcc_assert (opts->x_ix86_abi == SYSV_ABI || opts->x_ix86_abi == MS_ABI);
1943
1944   const char *abi_name = opts->x_ix86_abi == MS_ABI ? "ms" : "sysv";
1945   if ((opts->x_flag_sanitize & SANITIZE_USER_ADDRESS)
1946       && opts->x_ix86_abi != DEFAULT_ABI)
1947     error ("%<-mabi=%s%> not supported with %<-fsanitize=address%>", abi_name);
1948   if ((opts->x_flag_sanitize & SANITIZE_KERNEL_ADDRESS)
1949       && opts->x_ix86_abi != DEFAULT_ABI)
1950     error ("%<-mabi=%s%> not supported with %<-fsanitize=kernel-address%>",
1951            abi_name);
1952   if ((opts->x_flag_sanitize & SANITIZE_THREAD)
1953       && opts->x_ix86_abi != DEFAULT_ABI)
1954     error ("%<-mabi=%s%> not supported with %<-fsanitize=thread%>", abi_name);
1955
1956   /* For targets using ms ABI enable ms-extensions, if not
1957      explicit turned off.  For non-ms ABI we turn off this
1958      option.  */
1959   SET_OPTION_IF_UNSET (opts, opts_set, flag_ms_extensions,
1960                        (MS_ABI == DEFAULT_ABI));
1961
1962   if (opts_set->x_ix86_cmodel)
1963     {
1964       switch (opts->x_ix86_cmodel)
1965         {
1966         case CM_SMALL:
1967         case CM_SMALL_PIC:
1968           if (opts->x_flag_pic)
1969             opts->x_ix86_cmodel = CM_SMALL_PIC;
1970           if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
1971             error ("code model %qs not supported in the %s bit mode",
1972                    "small", "32");
1973           break;
1974
1975         case CM_MEDIUM:
1976         case CM_MEDIUM_PIC:
1977           if (opts->x_flag_pic)
1978             opts->x_ix86_cmodel = CM_MEDIUM_PIC;
1979           if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
1980             error ("code model %qs not supported in the %s bit mode",
1981                    "medium", "32");
1982           else if (TARGET_X32_P (opts->x_ix86_isa_flags))
1983             error ("code model %qs not supported in x32 mode",
1984                    "medium");
1985           break;
1986
1987         case CM_LARGE:
1988         case CM_LARGE_PIC:
1989           if (opts->x_flag_pic)
1990             opts->x_ix86_cmodel = CM_LARGE_PIC;
1991           if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
1992             error ("code model %qs not supported in the %s bit mode",
1993                    "large", "32");
1994           else if (TARGET_X32_P (opts->x_ix86_isa_flags))
1995             error ("code model %qs not supported in x32 mode",
1996                    "large");
1997           break;
1998
1999         case CM_32:
2000           if (opts->x_flag_pic)
2001             error ("code model %s does not support PIC mode", "32");
2002           if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
2003             error ("code model %qs not supported in the %s bit mode",
2004                    "32", "64");
2005           break;
2006
2007         case CM_KERNEL:
2008           if (opts->x_flag_pic)
2009             {
2010               error ("code model %s does not support PIC mode", "kernel");
2011               opts->x_ix86_cmodel = CM_32;
2012             }
2013           if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
2014             error ("code model %qs not supported in the %s bit mode",
2015                    "kernel", "32");
2016           break;
2017
2018         default:
2019           gcc_unreachable ();
2020         }
2021     }
2022   else
2023     {
2024       /* For TARGET_64BIT and MS_ABI, force pic on, in order to enable the
2025          use of rip-relative addressing.  This eliminates fixups that
2026          would otherwise be needed if this object is to be placed in a
2027          DLL, and is essentially just as efficient as direct addressing.  */
2028       if (TARGET_64BIT_P (opts->x_ix86_isa_flags)
2029           && (TARGET_RDOS || TARGET_PECOFF))
2030         opts->x_ix86_cmodel = CM_MEDIUM_PIC, opts->x_flag_pic = 1;
2031       else if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
2032         opts->x_ix86_cmodel = opts->x_flag_pic ? CM_SMALL_PIC : CM_SMALL;
2033       else
2034         opts->x_ix86_cmodel = CM_32;
2035     }
2036   if (TARGET_MACHO && opts->x_ix86_asm_dialect == ASM_INTEL)
2037     {
2038       error ("%<-masm=intel%> not supported in this configuration");
2039       opts->x_ix86_asm_dialect = ASM_ATT;
2040     }
2041   if ((TARGET_64BIT_P (opts->x_ix86_isa_flags) != 0)
2042       != ((opts->x_ix86_isa_flags & OPTION_MASK_ISA_64BIT) != 0))
2043     sorry ("%i-bit mode not compiled in",
2044            (opts->x_ix86_isa_flags & OPTION_MASK_ISA_64BIT) ? 64 : 32);
2045
2046   for (i = 0; i < pta_size; i++)
2047     if (! strcmp (opts->x_ix86_arch_string, processor_alias_table[i].name))
2048       {
2049         if (!strcmp (opts->x_ix86_arch_string, "generic"))
2050           {
2051             error (main_args_p
2052                    ? G_("%<generic%> CPU can be used only for %<-mtune=%> "
2053                         "switch")
2054                    : G_("%<generic%> CPU can be used only for "
2055                         "%<target(\"tune=\")%> attribute"));
2056             return false;
2057           }
2058         else if (!strcmp (opts->x_ix86_arch_string, "intel"))
2059           {
2060             error (main_args_p
2061                    ? G_("%<intel%> CPU can be used only for %<-mtune=%> "
2062                         "switch")
2063                    : G_("%<intel%> CPU can be used only for "
2064                         "%<target(\"tune=\")%> attribute"));
2065             return false;
2066           }
2067
2068         if (TARGET_64BIT_P (opts->x_ix86_isa_flags)
2069             && !((processor_alias_table[i].flags & PTA_64BIT) != 0))
2070           {
2071             error ("CPU you selected does not support x86-64 "
2072                    "instruction set");
2073             return false;
2074           }
2075
2076         /* The feature-only micro-architecture levels that use
2077            PTA_NO_TUNE are only defined for the x86-64 psABI.  */
2078         if ((processor_alias_table[i].flags & PTA_NO_TUNE) != 0
2079             && (!TARGET_64BIT_P (opts->x_ix86_isa_flags)
2080                 || opts->x_ix86_abi != SYSV_ABI))
2081           {
2082             error (G_("%qs architecture level is only defined"
2083                       " for the x86-64 psABI"), opts->x_ix86_arch_string);
2084             return false;
2085           }
2086
2087         ix86_schedule = processor_alias_table[i].schedule;
2088         ix86_arch = processor_alias_table[i].processor;
2089
2090         /* Default cpu tuning to the architecture, unless the table
2091            entry requests not to do this.  Used by the x86-64 psABI
2092            micro-architecture levels.  */
2093         if ((processor_alias_table[i].flags & PTA_NO_TUNE) == 0)
2094           ix86_tune = ix86_arch;
2095         else
2096           ix86_tune = PROCESSOR_GENERIC;
2097
2098         if (((processor_alias_table[i].flags & PTA_MMX) != 0)
2099             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_MMX))
2100           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_MMX;
2101         if (((processor_alias_table[i].flags & PTA_3DNOW) != 0)
2102             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_3DNOW))
2103           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_3DNOW;
2104         if (((processor_alias_table[i].flags & PTA_3DNOW_A) != 0)
2105             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_3DNOW_A))
2106           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_3DNOW_A;
2107         if (((processor_alias_table[i].flags & PTA_SSE) != 0)
2108             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_SSE))
2109           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE;
2110         if (((processor_alias_table[i].flags & PTA_SSE2) != 0)
2111             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_SSE2))
2112           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE2;
2113         if (((processor_alias_table[i].flags & PTA_SSE3) != 0)
2114             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_SSE3))
2115           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE3;
2116         if (((processor_alias_table[i].flags & PTA_SSSE3) != 0)
2117             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_SSSE3))
2118           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSSE3;
2119         if (((processor_alias_table[i].flags & PTA_SSE4_1) != 0)
2120             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_SSE4_1))
2121           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4_1;
2122         if (((processor_alias_table[i].flags & PTA_SSE4_2) != 0)
2123             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_SSE4_2))
2124           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4_2;
2125         if (((processor_alias_table[i].flags & PTA_AVX) != 0)
2126             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX))
2127           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX;
2128         if (((processor_alias_table[i].flags & PTA_AVX2) != 0)
2129             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX2))
2130           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX2;
2131         if (((processor_alias_table[i].flags & PTA_FMA) != 0)
2132             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_FMA))
2133           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FMA;
2134         if (((processor_alias_table[i].flags & PTA_SSE4A) != 0)
2135             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_SSE4A))
2136           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SSE4A;
2137         if (((processor_alias_table[i].flags & PTA_FMA4) != 0)
2138             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_FMA4))
2139           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FMA4;
2140         if (((processor_alias_table[i].flags & PTA_XOP) != 0)
2141             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_XOP))
2142           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XOP;
2143         if (((processor_alias_table[i].flags & PTA_LWP) != 0)
2144             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_LWP))
2145           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_LWP;
2146         if (((processor_alias_table[i].flags & PTA_ABM) != 0)
2147             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_ABM))
2148           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_ABM;
2149         if (((processor_alias_table[i].flags & PTA_BMI) != 0)
2150             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_BMI))
2151           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_BMI;
2152         if (((processor_alias_table[i].flags & (PTA_LZCNT | PTA_ABM)) != 0)
2153             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_LZCNT))
2154           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_LZCNT;
2155         if (((processor_alias_table[i].flags & PTA_TBM) != 0)
2156             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_TBM))
2157           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_TBM;
2158         if (((processor_alias_table[i].flags & PTA_BMI2) != 0)
2159             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_BMI2))
2160           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_BMI2;
2161         if (((processor_alias_table[i].flags & PTA_CX16) != 0)
2162             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_CX16))
2163           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_CX16;
2164         if (((processor_alias_table[i].flags & (PTA_POPCNT | PTA_ABM)) != 0)
2165             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_POPCNT))
2166           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_POPCNT;
2167         if (!(TARGET_64BIT_P (opts->x_ix86_isa_flags)
2168             && ((processor_alias_table[i].flags & PTA_NO_SAHF) != 0))
2169             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_SAHF))
2170           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_SAHF;
2171         if (((processor_alias_table[i].flags & PTA_MOVBE) != 0)
2172             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_MOVBE))
2173           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_MOVBE;
2174         if (((processor_alias_table[i].flags & PTA_AES) != 0)
2175             && !(ix86_isa_flags_explicit & OPTION_MASK_ISA_AES))
2176           ix86_isa_flags |= OPTION_MASK_ISA_AES;
2177         if (((processor_alias_table[i].flags & PTA_SHA) != 0)
2178             && !(ix86_isa_flags_explicit & OPTION_MASK_ISA_SHA))
2179           ix86_isa_flags |= OPTION_MASK_ISA_SHA;
2180         if (((processor_alias_table[i].flags & PTA_PCLMUL) != 0)
2181             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_PCLMUL))
2182           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PCLMUL;
2183         if (((processor_alias_table[i].flags & PTA_FSGSBASE) != 0)
2184             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_FSGSBASE))
2185           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FSGSBASE;
2186         if (((processor_alias_table[i].flags & PTA_RDRND) != 0)
2187             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_RDRND))
2188           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RDRND;
2189         if (((processor_alias_table[i].flags & PTA_F16C) != 0)
2190             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_F16C))
2191           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_F16C;
2192         if (((processor_alias_table[i].flags & PTA_RTM) != 0)
2193             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_RTM))
2194           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RTM;
2195         if (((processor_alias_table[i].flags & PTA_HLE) != 0)
2196             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_HLE))
2197           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_HLE;
2198         if (((processor_alias_table[i].flags & PTA_PRFCHW) != 0)
2199             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_PRFCHW))
2200           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PRFCHW;
2201         if (((processor_alias_table[i].flags & PTA_RDSEED) != 0)
2202             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_RDSEED))
2203           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_RDSEED;
2204         if (((processor_alias_table[i].flags & PTA_ADX) != 0)
2205             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_ADX))
2206           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_ADX;
2207         if (((processor_alias_table[i].flags & PTA_FXSR) != 0)
2208             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_FXSR))
2209           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_FXSR;
2210         if (((processor_alias_table[i].flags & PTA_XSAVE) != 0)
2211             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_XSAVE))
2212           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVE;
2213         if (((processor_alias_table[i].flags & PTA_XSAVEOPT) != 0)
2214             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_XSAVEOPT))
2215           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVEOPT;
2216         if (((processor_alias_table[i].flags & PTA_AVX512F) != 0)
2217             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512F))
2218           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512F;
2219         if (((processor_alias_table[i].flags & PTA_AVX512ER) != 0)
2220             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512ER))
2221           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512ER;
2222         if (((processor_alias_table[i].flags & PTA_AVX512PF) != 0)
2223             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512PF))
2224           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512PF;
2225         if (((processor_alias_table[i].flags & PTA_AVX512CD) != 0)
2226             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512CD))
2227           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512CD;
2228         if (((processor_alias_table[i].flags & PTA_PREFETCHWT1) != 0)
2229             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_PREFETCHWT1))
2230           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PREFETCHWT1;
2231         if (((processor_alias_table[i].flags & PTA_CLWB) != 0)
2232             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_CLWB))
2233           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_CLWB;
2234         if (((processor_alias_table[i].flags & PTA_CLFLUSHOPT) != 0)
2235             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_CLFLUSHOPT))
2236           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_CLFLUSHOPT;
2237         if (((processor_alias_table[i].flags & PTA_CLZERO) != 0)
2238             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_CLZERO))
2239           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_CLZERO;
2240         if (((processor_alias_table[i].flags & PTA_XSAVEC) != 0)
2241             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_XSAVEC))
2242           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVEC;
2243         if (((processor_alias_table[i].flags & PTA_XSAVES) != 0)
2244             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_XSAVES))
2245           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_XSAVES;
2246         if (((processor_alias_table[i].flags & PTA_AVX512DQ) != 0)
2247             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512DQ))
2248           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512DQ;
2249         if (((processor_alias_table[i].flags & PTA_AVX512BW) != 0)
2250             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512BW))
2251           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512BW;
2252         if (((processor_alias_table[i].flags & PTA_AVX512VL) != 0)
2253             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512VL))
2254           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VL;
2255         if (((processor_alias_table[i].flags & PTA_AVX512VBMI) != 0)
2256             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512VBMI))
2257           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VBMI;
2258         if (((processor_alias_table[i].flags & PTA_AVX512IFMA) != 0)
2259             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512IFMA))
2260           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512IFMA;
2261         if (((processor_alias_table[i].flags & PTA_AVX512VNNI) != 0)
2262             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_AVX512VNNI))
2263           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VNNI;
2264         if (((processor_alias_table[i].flags & PTA_GFNI) != 0)
2265             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_GFNI))
2266           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_GFNI;
2267         if (((processor_alias_table[i].flags & PTA_AVX512VBMI2) != 0)
2268             && !(opts->x_ix86_isa_flags_explicit
2269             & OPTION_MASK_ISA_AVX512VBMI2))
2270           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VBMI2;
2271         if (((processor_alias_table[i].flags & PTA_VPCLMULQDQ) != 0)
2272             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_VPCLMULQDQ))
2273           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_VPCLMULQDQ;
2274         if (((processor_alias_table[i].flags & PTA_AVX512BITALG) != 0)
2275             && !(opts->x_ix86_isa_flags_explicit
2276             & OPTION_MASK_ISA_AVX512BITALG))
2277           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512BITALG;
2278
2279         if (((processor_alias_table[i].flags & PTA_AVX512VP2INTERSECT) != 0)
2280             && !(opts->x_ix86_isa_flags2_explicit
2281                  & OPTION_MASK_ISA2_AVX512VP2INTERSECT))
2282           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_AVX512VP2INTERSECT;
2283         if (((processor_alias_table[i].flags & PTA_AVX5124VNNIW) != 0)
2284             && !(opts->x_ix86_isa_flags2_explicit
2285                  & OPTION_MASK_ISA2_AVX5124VNNIW))
2286           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_AVX5124VNNIW;
2287         if (((processor_alias_table[i].flags & PTA_AVX5124FMAPS) != 0)
2288             && !(opts->x_ix86_isa_flags2_explicit
2289                  & OPTION_MASK_ISA2_AVX5124FMAPS))
2290           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_AVX5124FMAPS;
2291         if (((processor_alias_table[i].flags & PTA_AVX512VPOPCNTDQ) != 0)
2292             && !(opts->x_ix86_isa_flags_explicit
2293                  & OPTION_MASK_ISA_AVX512VPOPCNTDQ))
2294           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_AVX512VPOPCNTDQ;
2295         if (((processor_alias_table[i].flags & PTA_AVX512BF16) != 0)
2296             && !(opts->x_ix86_isa_flags2_explicit
2297                  & OPTION_MASK_ISA2_AVX512BF16))
2298           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_AVX512BF16;
2299         if (((processor_alias_table[i].flags & PTA_AMX_TILE) != 0)
2300             && !(opts->x_ix86_isa_flags2_explicit
2301                  & OPTION_MASK_ISA2_AMX_TILE))
2302           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_AMX_TILE;
2303         if (((processor_alias_table[i].flags & PTA_AMX_INT8) != 0)
2304             && !(opts->x_ix86_isa_flags2_explicit
2305                  & OPTION_MASK_ISA2_AMX_INT8))
2306           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_AMX_INT8;
2307         if (((processor_alias_table[i].flags & PTA_AMX_BF16) != 0)
2308             && !(opts->x_ix86_isa_flags2_explicit
2309                  & OPTION_MASK_ISA2_AMX_BF16))
2310           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_AMX_BF16;
2311         if (((processor_alias_table[i].flags & PTA_AVXVNNI) != 0)
2312             && !(opts->x_ix86_isa_flags2_explicit
2313                  & OPTION_MASK_ISA2_AVXVNNI))
2314           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_AVXVNNI;
2315         if (((processor_alias_table[i].flags & PTA_MOVDIRI) != 0)
2316             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_MOVDIRI))
2317           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_MOVDIRI;
2318         if (((processor_alias_table[i].flags & PTA_MOVDIR64B) != 0)
2319             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_MOVDIR64B))
2320           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_MOVDIR64B;
2321         if (((processor_alias_table[i].flags & PTA_SGX) != 0)
2322             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_SGX))
2323           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_SGX;
2324         if (((processor_alias_table[i].flags & PTA_VAES) != 0)
2325             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_VAES))
2326           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_VAES;
2327         if (((processor_alias_table[i].flags & PTA_RDPID) != 0)
2328             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_RDPID))
2329           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_RDPID;
2330         if (((processor_alias_table[i].flags & PTA_PCONFIG) != 0)
2331             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_PCONFIG))
2332           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_PCONFIG;
2333         if (((processor_alias_table[i].flags & PTA_WBNOINVD) != 0)
2334             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_WBNOINVD))
2335           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_WBNOINVD;
2336         if (((processor_alias_table[i].flags & PTA_PTWRITE) != 0)
2337             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_PTWRITE))
2338           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_PTWRITE;
2339         if (((processor_alias_table[i].flags & PTA_WAITPKG) != 0)
2340             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_WAITPKG))
2341           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_WAITPKG;
2342         if (((processor_alias_table[i].flags & PTA_ENQCMD) != 0)
2343             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_ENQCMD))
2344           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_ENQCMD;
2345         if (((processor_alias_table[i].flags & PTA_CLDEMOTE) != 0)
2346             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_CLDEMOTE))
2347           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_CLDEMOTE;
2348         if (((processor_alias_table[i].flags & PTA_SERIALIZE) != 0)
2349             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_SERIALIZE))
2350           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_SERIALIZE;
2351         if (((processor_alias_table[i].flags & PTA_TSXLDTRK) != 0)
2352             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_TSXLDTRK))
2353           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_TSXLDTRK;
2354         if (((processor_alias_table[i].flags & PTA_KL) != 0)
2355             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_KL))
2356           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_KL;
2357         if (((processor_alias_table[i].flags & PTA_WIDEKL) != 0)
2358             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_WIDEKL))
2359           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_WIDEKL;
2360
2361         if ((processor_alias_table[i].flags
2362            & (PTA_PREFETCH_SSE | PTA_SSE)) != 0)
2363           x86_prefetch_sse = true;
2364         if (((processor_alias_table[i].flags & PTA_MWAITX) != 0)
2365             && !(opts->x_ix86_isa_flags2_explicit & OPTION_MASK_ISA2_MWAITX))
2366           opts->x_ix86_isa_flags2 |= OPTION_MASK_ISA2_MWAITX;
2367         if (((processor_alias_table[i].flags & PTA_PKU) != 0)
2368             && !(opts->x_ix86_isa_flags_explicit & OPTION_MASK_ISA_PKU))
2369           opts->x_ix86_isa_flags |= OPTION_MASK_ISA_PKU;
2370
2371         /* Don't enable x87 instructions if only general registers are
2372            allowed by target("general-regs-only") function attribute or
2373            -mgeneral-regs-only.  */
2374         if (!(opts->x_ix86_target_flags & OPTION_MASK_GENERAL_REGS_ONLY)
2375             && !(opts_set->x_target_flags & MASK_80387))
2376           {
2377             if (((processor_alias_table[i].flags & PTA_NO_80387) != 0))
2378               opts->x_target_flags &= ~MASK_80387;
2379             else
2380               opts->x_target_flags |= MASK_80387;
2381           }
2382         break;
2383       }
2384
2385   if (i == pta_size)
2386     {
2387       error (main_args_p
2388              ? G_("bad value (%qs) for %<-march=%> switch")
2389              : G_("bad value (%qs) for %<target(\"arch=\")%> attribute"),
2390              opts->x_ix86_arch_string);
2391
2392       auto_vec <const char *> candidates;
2393       for (i = 0; i < pta_size; i++)
2394         if (strcmp (processor_alias_table[i].name, "generic")
2395             && strcmp (processor_alias_table[i].name, "intel")
2396             && (!TARGET_64BIT_P (opts->x_ix86_isa_flags)
2397                 || ((processor_alias_table[i].flags & PTA_64BIT) != 0)))
2398           candidates.safe_push (processor_alias_table[i].name);
2399
2400 #ifdef HAVE_LOCAL_CPU_DETECT
2401       /* Add also "native" as possible value.  */
2402       candidates.safe_push ("native");
2403 #endif
2404
2405       char *s;
2406       const char *hint
2407         = candidates_list_and_hint (opts->x_ix86_arch_string, s, candidates);
2408       if (hint)
2409         inform (input_location,
2410                 main_args_p
2411                 ? G_("valid arguments to %<-march=%> switch are: "
2412                      "%s; did you mean %qs?")
2413                 : G_("valid arguments to %<target(\"arch=\")%> attribute are: "
2414                      "%s; did you mean %qs?"), s, hint);
2415       else
2416         inform (input_location,
2417                 main_args_p
2418                 ? G_("valid arguments to %<-march=%> switch are: %s")
2419                 : G_("valid arguments to %<target(\"arch=\")%> attribute "
2420                      "are: %s"), s);
2421       XDELETEVEC (s);
2422     }
2423
2424   ix86_arch_mask = HOST_WIDE_INT_1U << ix86_arch;
2425   for (i = 0; i < X86_ARCH_LAST; ++i)
2426     ix86_arch_features[i] = !!(initial_ix86_arch_features[i] & ix86_arch_mask);
2427
2428   for (i = 0; i < pta_size; i++)
2429     if (! strcmp (opts->x_ix86_tune_string, processor_alias_table[i].name)
2430         && (processor_alias_table[i].flags & PTA_NO_TUNE) == 0)
2431       {
2432         ix86_schedule = processor_alias_table[i].schedule;
2433         ix86_tune = processor_alias_table[i].processor;
2434         if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
2435           {
2436             if (!((processor_alias_table[i].flags & PTA_64BIT) != 0))
2437               {
2438                 if (ix86_tune_defaulted)
2439                   {
2440                     opts->x_ix86_tune_string = "x86-64";
2441                     for (i = 0; i < pta_size; i++)
2442                       if (! strcmp (opts->x_ix86_tune_string,
2443                                     processor_alias_table[i].name))
2444                         break;
2445                     ix86_schedule = processor_alias_table[i].schedule;
2446                     ix86_tune = processor_alias_table[i].processor;
2447                   }
2448                 else
2449                   error ("CPU you selected does not support x86-64 "
2450                          "instruction set");
2451               }
2452           }
2453         /* Intel CPUs have always interpreted SSE prefetch instructions as
2454            NOPs; so, we can enable SSE prefetch instructions even when
2455            -mtune (rather than -march) points us to a processor that has them.
2456            However, the VIA C3 gives a SIGILL, so we only do that for i686 and
2457            higher processors.  */
2458         if (TARGET_CMOV
2459             && ((processor_alias_table[i].flags
2460               & (PTA_PREFETCH_SSE | PTA_SSE)) != 0))
2461           x86_prefetch_sse = true;
2462         break;
2463       }
2464
2465   if (ix86_tune_specified && i == pta_size)
2466     {
2467       error (main_args_p
2468              ? G_("bad value (%qs) for %<-mtune=%> switch")
2469              : G_("bad value (%qs) for %<target(\"tune=\")%> attribute"),
2470              opts->x_ix86_tune_string);
2471
2472       auto_vec <const char *> candidates;
2473       for (i = 0; i < pta_size; i++)
2474         if ((!TARGET_64BIT_P (opts->x_ix86_isa_flags)
2475              || ((processor_alias_table[i].flags & PTA_64BIT) != 0))
2476             && (processor_alias_table[i].flags & PTA_NO_TUNE) == 0)
2477           candidates.safe_push (processor_alias_table[i].name);
2478
2479 #ifdef HAVE_LOCAL_CPU_DETECT
2480       /* Add also "native" as possible value.  */
2481       candidates.safe_push ("native");
2482 #endif
2483
2484       char *s;
2485       const char *hint
2486         = candidates_list_and_hint (opts->x_ix86_tune_string, s, candidates);
2487       if (hint)
2488         inform (input_location,
2489                 main_args_p
2490                 ? G_("valid arguments to %<-mtune=%> switch are: "
2491                      "%s; did you mean %qs?")
2492                 : G_("valid arguments to %<target(\"tune=\")%> attribute are: "
2493                      "%s; did you mean %qs?"), s, hint);
2494       else
2495         inform (input_location,
2496                 main_args_p
2497                 ? G_("valid arguments to %<-mtune=%> switch are: %s")
2498                 : G_("valid arguments to %<target(\"tune=\")%> attribute "
2499                      "are: %s"), s);
2500       XDELETEVEC (s);
2501     }
2502
2503   set_ix86_tune_features (opts, ix86_tune, opts->x_ix86_dump_tunes);
2504
2505   ix86_recompute_optlev_based_flags (opts, opts_set);
2506
2507   ix86_tune_cost = processor_cost_table[ix86_tune];
2508   /* TODO: ix86_cost should be chosen at instruction or function granuality
2509      so for cold code we use size_cost even in !optimize_size compilation.  */
2510   if (opts->x_optimize_size)
2511     ix86_cost = &ix86_size_cost;
2512   else
2513     ix86_cost = ix86_tune_cost;
2514
2515   /* Arrange to set up i386_stack_locals for all functions.  */
2516   init_machine_status = ix86_init_machine_status;
2517
2518   /* Validate -mregparm= value.  */
2519   if (opts_set->x_ix86_regparm)
2520     {
2521       if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
2522         warning (0, "%<-mregparm%> is ignored in 64-bit mode");
2523       else if (TARGET_IAMCU_P (opts->x_target_flags))
2524         warning (0, "%<-mregparm%> is ignored for Intel MCU psABI");
2525       if (opts->x_ix86_regparm > REGPARM_MAX)
2526         {
2527           error ("%<-mregparm=%d%> is not between 0 and %d",
2528                  opts->x_ix86_regparm, REGPARM_MAX);
2529           opts->x_ix86_regparm = 0;
2530         }
2531     }
2532   if (TARGET_IAMCU_P (opts->x_target_flags)
2533       || TARGET_64BIT_P (opts->x_ix86_isa_flags))
2534     opts->x_ix86_regparm = REGPARM_MAX;
2535
2536   /* Default align_* from the processor table.  */
2537   ix86_default_align (opts);
2538
2539   /* Provide default for -mbranch-cost= value.  */
2540   SET_OPTION_IF_UNSET (opts, opts_set, ix86_branch_cost,
2541                        ix86_tune_cost->branch_cost);
2542
2543   if (TARGET_64BIT_P (opts->x_ix86_isa_flags))
2544     {
2545       opts->x_target_flags
2546         |= TARGET_SUBTARGET64_DEFAULT & ~opts_set->x_target_flags;
2547
2548       if (!ix86_arch_specified)
2549         opts->x_ix86_isa_flags
2550           |= TARGET_SUBTARGET64_ISA_DEFAULT & ~opts->x_ix86_isa_flags_explicit;
2551
2552       if (TARGET_RTD_P (opts->x_target_flags))
2553         warning (0,
2554                  main_args_p
2555                  ? G_("%<-mrtd%> is ignored in 64bit mode")
2556                  : G_("%<target(\"rtd\")%> is ignored in 64bit mode"));
2557     }
2558   else
2559     {
2560       opts->x_target_flags
2561         |= TARGET_SUBTARGET32_DEFAULT & ~opts_set->x_target_flags;
2562
2563       if (!ix86_arch_specified)
2564         opts->x_ix86_isa_flags
2565           |= TARGET_SUBTARGET32_ISA_DEFAULT & ~opts->x_ix86_isa_flags_explicit;
2566
2567       /* i386 ABI does not specify red zone.  It still makes sense to use it
2568          when programmer takes care to stack from being destroyed.  */
2569       if (!(opts_set->x_target_flags & MASK_NO_RED_ZONE))
2570         opts->x_target_flags |= MASK_NO_RED_ZONE;
2571     }
2572
2573   /* Keep nonleaf frame pointers.  */
2574   if (opts->x_flag_omit_frame_pointer)
2575     opts->x_target_flags &= ~MASK_OMIT_LEAF_FRAME_POINTER;
2576   else if (TARGET_OMIT_LEAF_FRAME_POINTER_P (opts->x_target_flags))
2577     opts->x_flag_omit_frame_pointer = 1;
2578
2579   /* If we're doing fast math, we don't care about comparison order
2580      wrt NaNs.  This lets us use a shorter comparison sequence.  */
2581   if (opts->x_flag_finite_math_only)
2582     opts->x_target_flags &= ~MASK_IEEE_FP;
2583
2584   /* If the architecture always has an FPU, turn off NO_FANCY_MATH_387,
2585      since the insns won't need emulation.  */
2586   if (ix86_tune_features [X86_TUNE_ALWAYS_FANCY_MATH_387])
2587     opts->x_target_flags &= ~MASK_NO_FANCY_MATH_387;
2588
2589   /* Likewise, if the target doesn't have a 387, or we've specified
2590      software floating point, don't use 387 inline intrinsics.  */
2591   if (!TARGET_80387_P (opts->x_target_flags))
2592     opts->x_target_flags |= MASK_NO_FANCY_MATH_387;
2593
2594   /* Turn on MMX builtins for -msse.  */
2595   if (TARGET_SSE_P (opts->x_ix86_isa_flags))
2596     opts->x_ix86_isa_flags
2597       |= OPTION_MASK_ISA_MMX & ~opts->x_ix86_isa_flags_explicit;
2598
2599   /* Enable SSE prefetch.  */
2600   if (TARGET_SSE_P (opts->x_ix86_isa_flags)
2601       || (TARGET_PRFCHW_P (opts->x_ix86_isa_flags)
2602           && !TARGET_3DNOW_P (opts->x_ix86_isa_flags))
2603       || TARGET_PREFETCHWT1_P (opts->x_ix86_isa_flags))
2604     x86_prefetch_sse = true;
2605
2606   /* Enable popcnt instruction for -msse4.2 or -mabm.  */
2607   if (TARGET_SSE4_2_P (opts->x_ix86_isa_flags)
2608       || TARGET_ABM_P (opts->x_ix86_isa_flags))
2609     opts->x_ix86_isa_flags
2610       |= OPTION_MASK_ISA_POPCNT & ~opts->x_ix86_isa_flags_explicit;
2611
2612   /* Enable lzcnt instruction for -mabm.  */
2613   if (TARGET_ABM_P(opts->x_ix86_isa_flags))
2614     opts->x_ix86_isa_flags
2615       |= OPTION_MASK_ISA_LZCNT & ~opts->x_ix86_isa_flags_explicit;
2616
2617   /* Disable BMI, BMI2 and TBM instructions for -m16.  */
2618   if (TARGET_16BIT_P(opts->x_ix86_isa_flags))
2619     opts->x_ix86_isa_flags
2620       &= ~((OPTION_MASK_ISA_BMI | OPTION_MASK_ISA_BMI2 | OPTION_MASK_ISA_TBM)
2621            & ~opts->x_ix86_isa_flags_explicit);
2622
2623   /* Validate -mpreferred-stack-boundary= value or default it to
2624      PREFERRED_STACK_BOUNDARY_DEFAULT.  */
2625   ix86_preferred_stack_boundary = PREFERRED_STACK_BOUNDARY_DEFAULT;
2626   if (opts_set->x_ix86_preferred_stack_boundary_arg)
2627     {
2628       int min = TARGET_64BIT_P (opts->x_ix86_isa_flags)? 3 : 2;
2629       int max = TARGET_SEH ? 4 : 12;
2630
2631       if (opts->x_ix86_preferred_stack_boundary_arg < min
2632           || opts->x_ix86_preferred_stack_boundary_arg > max)
2633         {
2634           if (min == max)
2635             error ("%<-mpreferred-stack-boundary%> is not supported "
2636                    "for this target");
2637           else
2638             error ("%<-mpreferred-stack-boundary=%d%> is not between %d and %d",
2639                    opts->x_ix86_preferred_stack_boundary_arg, min, max);
2640         }
2641       else
2642         ix86_preferred_stack_boundary
2643           = (1 << opts->x_ix86_preferred_stack_boundary_arg) * BITS_PER_UNIT;
2644     }
2645
2646   /* Set the default value for -mstackrealign.  */
2647   SET_OPTION_IF_UNSET (opts, opts_set, ix86_force_align_arg_pointer,
2648                        STACK_REALIGN_DEFAULT);
2649
2650   ix86_default_incoming_stack_boundary = PREFERRED_STACK_BOUNDARY;
2651
2652   /* Validate -mincoming-stack-boundary= value or default it to
2653      MIN_STACK_BOUNDARY/PREFERRED_STACK_BOUNDARY.  */
2654   ix86_incoming_stack_boundary = ix86_default_incoming_stack_boundary;
2655   if (opts_set->x_ix86_incoming_stack_boundary_arg)
2656     {
2657       int min = TARGET_64BIT_P (opts->x_ix86_isa_flags) ? 3 : 2;
2658
2659       if (opts->x_ix86_incoming_stack_boundary_arg < min
2660           || opts->x_ix86_incoming_stack_boundary_arg > 12)
2661         error ("%<-mincoming-stack-boundary=%d%> is not between %d and 12",
2662                opts->x_ix86_incoming_stack_boundary_arg, min);
2663       else
2664         {
2665           ix86_user_incoming_stack_boundary
2666             = (1 << opts->x_ix86_incoming_stack_boundary_arg) * BITS_PER_UNIT;
2667           ix86_incoming_stack_boundary
2668             = ix86_user_incoming_stack_boundary;
2669         }
2670     }
2671
2672 #ifndef NO_PROFILE_COUNTERS
2673   if (flag_nop_mcount)
2674     error ("%<-mnop-mcount%> is not compatible with this target");
2675 #endif
2676   if (flag_nop_mcount && flag_pic)
2677     error ("%<-mnop-mcount%> is not implemented for %<-fPIC%>");
2678
2679   /* Accept -msseregparm only if at least SSE support is enabled.  */
2680   if (TARGET_SSEREGPARM_P (opts->x_target_flags)
2681       && ! TARGET_SSE_P (opts->x_ix86_isa_flags))
2682     error (main_args_p
2683            ? G_("%<-msseregparm%> used without SSE enabled")
2684            : G_("%<target(\"sseregparm\")%> used without SSE enabled"));
2685
2686   if (opts_set->x_ix86_fpmath)
2687     {
2688       if (opts->x_ix86_fpmath & FPMATH_SSE)
2689         {
2690           if (!TARGET_SSE_P (opts->x_ix86_isa_flags))
2691             {
2692               if (TARGET_80387_P (opts->x_target_flags))
2693                 {
2694                   warning (0, "SSE instruction set disabled, using 387 arithmetics");
2695                   opts->x_ix86_fpmath = FPMATH_387;
2696                 }
2697             }
2698           else if ((opts->x_ix86_fpmath & FPMATH_387)
2699                    && !TARGET_80387_P (opts->x_target_flags))
2700             {
2701               warning (0, "387 instruction set disabled, using SSE arithmetics");
2702               opts->x_ix86_fpmath = FPMATH_SSE;
2703             }
2704         }
2705     }
2706   /* For all chips supporting SSE2, -mfpmath=sse performs better than
2707      fpmath=387.  The second is however default at many targets since the
2708      extra 80bit precision of temporaries is considered to be part of ABI.
2709      Overwrite the default at least for -ffast-math.
2710      TODO: -mfpmath=both seems to produce same performing code with bit
2711      smaller binaries.  It is however not clear if register allocation is
2712      ready for this setting.
2713      Also -mfpmath=387 is overall a lot more compact (bout 4-5%) than SSE
2714      codegen.  We may switch to 387 with -ffast-math for size optimized
2715      functions. */
2716   else if (fast_math_flags_set_p (&global_options)
2717            && TARGET_SSE2_P (opts->x_ix86_isa_flags))
2718     opts->x_ix86_fpmath = FPMATH_SSE;
2719   else
2720     opts->x_ix86_fpmath = TARGET_FPMATH_DEFAULT_P (opts->x_ix86_isa_flags);
2721
2722   /* Use external vectorized library in vectorizing intrinsics.  */
2723   if (opts_set->x_ix86_veclibabi_type)
2724     switch (opts->x_ix86_veclibabi_type)
2725       {
2726       case ix86_veclibabi_type_svml:
2727         ix86_veclib_handler = &ix86_veclibabi_svml;
2728         break;
2729
2730       case ix86_veclibabi_type_acml:
2731         ix86_veclib_handler = &ix86_veclibabi_acml;
2732         break;
2733
2734       default:
2735         gcc_unreachable ();
2736       }
2737
2738   if (ix86_tune_features [X86_TUNE_ACCUMULATE_OUTGOING_ARGS]
2739       && !(opts_set->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS))
2740     opts->x_target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;
2741
2742   /* If stack probes are required, the space used for large function
2743      arguments on the stack must also be probed, so enable
2744      -maccumulate-outgoing-args so this happens in the prologue.  */
2745   if (TARGET_STACK_PROBE_P (opts->x_target_flags)
2746       && !(opts->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS))
2747     {
2748       if (opts_set->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS)
2749         warning (0,
2750                  main_args_p
2751                  ? G_("stack probing requires %<-maccumulate-outgoing-args%> "
2752                       "for correctness")
2753                  : G_("stack probing requires "
2754                       "%<target(\"accumulate-outgoing-args\")%> for "
2755                       "correctness"));
2756       opts->x_target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;
2757     }
2758
2759   /* Stack realignment without -maccumulate-outgoing-args requires %ebp,
2760      so enable -maccumulate-outgoing-args when %ebp is fixed.  */
2761   if (fixed_regs[BP_REG]
2762       && !(opts->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS))
2763     {
2764       if (opts_set->x_target_flags & MASK_ACCUMULATE_OUTGOING_ARGS)
2765         warning (0,
2766                  main_args_p
2767                  ? G_("fixed ebp register requires "
2768                       "%<-maccumulate-outgoing-args%>")
2769                  : G_("fixed ebp register requires "
2770                       "%<target(\"accumulate-outgoing-args\")%>"));
2771       opts->x_target_flags |= MASK_ACCUMULATE_OUTGOING_ARGS;
2772     }
2773
2774   /* Figure out what ASM_GENERATE_INTERNAL_LABEL builds as a prefix.  */
2775   {
2776     char *p;
2777     ASM_GENERATE_INTERNAL_LABEL (internal_label_prefix, "LX", 0);
2778     p = strchr (internal_label_prefix, 'X');
2779     internal_label_prefix_len = p - internal_label_prefix;
2780     *p = '\0';
2781   }
2782
2783   /* When scheduling description is not available, disable scheduler pass
2784      so it won't slow down the compilation and make x87 code slower.  */
2785   if (!TARGET_SCHEDULE)
2786     opts->x_flag_schedule_insns_after_reload = opts->x_flag_schedule_insns = 0;
2787
2788   SET_OPTION_IF_UNSET (opts, opts_set, param_simultaneous_prefetches,
2789                        ix86_tune_cost->simultaneous_prefetches);
2790   SET_OPTION_IF_UNSET (opts, opts_set, param_l1_cache_line_size,
2791                        ix86_tune_cost->prefetch_block);
2792   SET_OPTION_IF_UNSET (opts, opts_set, param_l1_cache_size,
2793                        ix86_tune_cost->l1_cache_size);
2794   SET_OPTION_IF_UNSET (opts, opts_set, param_l2_cache_size,
2795                        ix86_tune_cost->l2_cache_size);
2796
2797   /* Enable sw prefetching at -O3 for CPUS that prefetching is helpful.  */
2798   if (opts->x_flag_prefetch_loop_arrays < 0
2799       && HAVE_prefetch
2800       && (opts->x_optimize >= 3 || opts->x_flag_profile_use)
2801       && !opts->x_optimize_size
2802       && TARGET_SOFTWARE_PREFETCHING_BENEFICIAL)
2803     opts->x_flag_prefetch_loop_arrays = 1;
2804
2805   /* If using typedef char *va_list, signal that __builtin_va_start (&ap, 0)
2806      can be opts->x_optimized to ap = __builtin_next_arg (0).  */
2807   if (!TARGET_64BIT_P (opts->x_ix86_isa_flags) && !opts->x_flag_split_stack)
2808     targetm.expand_builtin_va_start = NULL;
2809
2810 #ifdef USE_IX86_CLD
2811   /* Use -mcld by default for 32-bit code if configured with --enable-cld.  */
2812   if (!TARGET_64BIT_P (opts->x_ix86_isa_flags))
2813     opts->x_target_flags |= MASK_CLD & ~opts_set->x_target_flags;
2814 #endif
2815
2816   /* Set the default value for -mfentry.  */
2817   if (!opts_set->x_flag_fentry)
2818     opts->x_flag_fentry = TARGET_SEH;
2819   else
2820     {
2821       if (!TARGET_64BIT_P (opts->x_ix86_isa_flags) && opts->x_flag_pic
2822           && opts->x_flag_fentry)
2823         sorry ("%<-mfentry%> isn%'t supported for 32-bit in combination "
2824                "with %<-fpic%>");
2825       else if (TARGET_SEH && !opts->x_flag_fentry)
2826         sorry ("%<-mno-fentry%> isn%'t compatible with SEH");
2827     }
2828
2829   if (TARGET_SEH && TARGET_CALL_MS2SYSV_XLOGUES)
2830     sorry ("%<-mcall-ms2sysv-xlogues%> isn%'t currently supported with SEH");
2831
2832   if (!(opts_set->x_target_flags & MASK_VZEROUPPER)
2833       && TARGET_EMIT_VZEROUPPER)
2834     opts->x_target_flags |= MASK_VZEROUPPER;
2835   if (!(opts_set->x_target_flags & MASK_STV))
2836     opts->x_target_flags |= MASK_STV;
2837   /* Disable STV if -mpreferred-stack-boundary={2,3} or
2838      -mincoming-stack-boundary={2,3} or -mstackrealign - the needed
2839      stack realignment will be extra cost the pass doesn't take into
2840      account and the pass can't realign the stack.  */
2841   if (ix86_preferred_stack_boundary < 128
2842       || ix86_incoming_stack_boundary < 128
2843       || opts->x_ix86_force_align_arg_pointer)
2844     opts->x_target_flags &= ~MASK_STV;
2845   if (!ix86_tune_features[X86_TUNE_AVX256_UNALIGNED_LOAD_OPTIMAL]
2846       && !(opts_set->x_target_flags & MASK_AVX256_SPLIT_UNALIGNED_LOAD))
2847     opts->x_target_flags |= MASK_AVX256_SPLIT_UNALIGNED_LOAD;
2848   if (!ix86_tune_features[X86_TUNE_AVX256_UNALIGNED_STORE_OPTIMAL]
2849       && !(opts_set->x_target_flags & MASK_AVX256_SPLIT_UNALIGNED_STORE))
2850     opts->x_target_flags |= MASK_AVX256_SPLIT_UNALIGNED_STORE;
2851
2852   /* Enable 128-bit AVX instruction generation
2853      for the auto-vectorizer.  */
2854   if (ix86_tune_features[X86_TUNE_AVX128_OPTIMAL]
2855       && (opts_set->x_prefer_vector_width_type == PVW_NONE))
2856     opts->x_prefer_vector_width_type = PVW_AVX128;
2857
2858   /* Use 256-bit AVX instruction generation
2859      in the auto-vectorizer.  */
2860   if (ix86_tune_features[X86_TUNE_AVX256_OPTIMAL]
2861       && (opts_set->x_prefer_vector_width_type == PVW_NONE))
2862     opts->x_prefer_vector_width_type = PVW_AVX256;
2863
2864   if (opts->x_ix86_recip_name)
2865     {
2866       char *p = ASTRDUP (opts->x_ix86_recip_name);
2867       char *q;
2868       unsigned int mask, i;
2869       bool invert;
2870
2871       while ((q = strtok (p, ",")) != NULL)
2872         {
2873           p = NULL;
2874           if (*q == '!')
2875             {
2876               invert = true;
2877               q++;
2878             }
2879           else
2880             invert = false;
2881
2882           if (!strcmp (q, "default"))
2883             mask = RECIP_MASK_ALL;
2884           else
2885             {
2886               for (i = 0; i < ARRAY_SIZE (recip_options); i++)
2887                 if (!strcmp (q, recip_options[i].string))
2888                   {
2889                     mask = recip_options[i].mask;
2890                     break;
2891                   }
2892
2893               if (i == ARRAY_SIZE (recip_options))
2894                 {
2895                   error ("unknown option for %<-mrecip=%s%>", q);
2896                   invert = false;
2897                   mask = RECIP_MASK_NONE;
2898                 }
2899             }
2900
2901           opts->x_recip_mask_explicit |= mask;
2902           if (invert)
2903             opts->x_recip_mask &= ~mask;
2904           else
2905             opts->x_recip_mask |= mask;
2906         }
2907     }
2908
2909   if (TARGET_RECIP_P (opts->x_target_flags))
2910     opts->x_recip_mask |= RECIP_MASK_ALL & ~opts->x_recip_mask_explicit;
2911   else if (opts_set->x_target_flags & MASK_RECIP)
2912     opts->x_recip_mask &= ~(RECIP_MASK_ALL & ~opts->x_recip_mask_explicit);
2913
2914   /* Default long double to 64-bit for 32-bit Bionic and to __float128
2915      for 64-bit Bionic.  Also default long double to 64-bit for Intel
2916      MCU psABI.  */
2917   if ((TARGET_HAS_BIONIC || TARGET_IAMCU)
2918       && !(opts_set->x_target_flags
2919            & (MASK_LONG_DOUBLE_64 | MASK_LONG_DOUBLE_128)))
2920     opts->x_target_flags |= (TARGET_64BIT
2921                              ? MASK_LONG_DOUBLE_128
2922                              : MASK_LONG_DOUBLE_64);
2923
2924   /* Only one of them can be active.  */
2925   gcc_assert ((opts->x_target_flags & MASK_LONG_DOUBLE_64) == 0
2926               || (opts->x_target_flags & MASK_LONG_DOUBLE_128) == 0);
2927
2928   /* Handle stack protector */
2929   if (!opts_set->x_ix86_stack_protector_guard)
2930     {
2931 #ifdef TARGET_THREAD_SSP_OFFSET
2932       if (!TARGET_HAS_BIONIC)
2933         opts->x_ix86_stack_protector_guard = SSP_TLS;
2934       else
2935 #endif
2936         opts->x_ix86_stack_protector_guard = SSP_GLOBAL;
2937     }
2938
2939   if (opts_set->x_ix86_stack_protector_guard_offset_str)
2940     {
2941       char *endp;
2942       const char *str = opts->x_ix86_stack_protector_guard_offset_str;
2943
2944       errno = 0;
2945       int64_t offset;
2946
2947 #if defined(INT64_T_IS_LONG)
2948       offset = strtol (str, &endp, 0);
2949 #else
2950       offset = strtoll (str, &endp, 0);
2951 #endif
2952
2953       if (!*str || *endp || errno)
2954         error ("%qs is not a valid number "
2955                "in %<-mstack-protector-guard-offset=%>", str);
2956
2957       if (!IN_RANGE (offset, HOST_WIDE_INT_C (-0x80000000),
2958                      HOST_WIDE_INT_C (0x7fffffff)))
2959         error ("%qs is not a valid offset "
2960                "in %<-mstack-protector-guard-offset=%>", str);
2961
2962       opts->x_ix86_stack_protector_guard_offset = offset;
2963     }
2964 #ifdef TARGET_THREAD_SSP_OFFSET
2965   else
2966     opts->x_ix86_stack_protector_guard_offset = TARGET_THREAD_SSP_OFFSET;
2967 #endif
2968
2969   if (opts_set->x_ix86_stack_protector_guard_reg_str)
2970     {
2971       const char *str = opts->x_ix86_stack_protector_guard_reg_str;
2972       addr_space_t seg = ADDR_SPACE_GENERIC;
2973
2974       /* Discard optional register prefix.  */
2975       if (str[0] == '%')
2976         str++;
2977
2978       if (strlen (str) == 2 && str[1] == 's')
2979         {
2980           if (str[0] == 'f')
2981             seg = ADDR_SPACE_SEG_FS;
2982           else if (str[0] == 'g')
2983             seg = ADDR_SPACE_SEG_GS;
2984         }
2985
2986       if (seg == ADDR_SPACE_GENERIC)
2987         error ("%qs is not a valid base register "
2988                "in %<-mstack-protector-guard-reg=%>",
2989                opts->x_ix86_stack_protector_guard_reg_str);
2990
2991       opts->x_ix86_stack_protector_guard_reg = seg;
2992     }
2993   else
2994     {
2995       opts->x_ix86_stack_protector_guard_reg = DEFAULT_TLS_SEG_REG;
2996
2997       /* The kernel uses a different segment register for performance
2998          reasons; a system call would not have to trash the userspace
2999          segment register, which would be expensive.  */
3000       if (opts->x_ix86_cmodel == CM_KERNEL)
3001         opts->x_ix86_stack_protector_guard_reg = ADDR_SPACE_SEG_GS;
3002     }
3003
3004   /* Handle -mmemcpy-strategy= and -mmemset-strategy=  */
3005   if (opts->x_ix86_tune_memcpy_strategy)
3006     {
3007       char *str = xstrdup (opts->x_ix86_tune_memcpy_strategy);
3008       ix86_parse_stringop_strategy_string (str, false);
3009       free (str);
3010     }
3011
3012   if (opts->x_ix86_tune_memset_strategy)
3013     {
3014       char *str = xstrdup (opts->x_ix86_tune_memset_strategy);
3015       ix86_parse_stringop_strategy_string (str, true);
3016       free (str);
3017     }
3018
3019   /* Save the initial options in case the user does function specific
3020      options.  */
3021   if (main_args_p)
3022     target_option_default_node = target_option_current_node
3023       = build_target_option_node (opts, opts_set);
3024
3025   if (opts->x_flag_cf_protection != CF_NONE)
3026     opts->x_flag_cf_protection
3027       = (cf_protection_level) (opts->x_flag_cf_protection | CF_SET);
3028
3029   if (ix86_tune_features [X86_TUNE_AVOID_256FMA_CHAINS])
3030     SET_OPTION_IF_UNSET (opts, opts_set, param_avoid_fma_max_bits, 256);
3031   else if (ix86_tune_features [X86_TUNE_AVOID_128FMA_CHAINS])
3032     SET_OPTION_IF_UNSET (opts, opts_set, param_avoid_fma_max_bits, 128);
3033
3034   /* PR86952: jump table usage with retpolines is slow.
3035      The PR provides some numbers about the slowness.  */
3036   if (ix86_indirect_branch != indirect_branch_keep)
3037     SET_OPTION_IF_UNSET (opts, opts_set, flag_jump_tables, 0);
3038
3039   return true;
3040 }
3041
3042 /* Implement the TARGET_OPTION_OVERRIDE hook.  */
3043
3044 void
3045 ix86_option_override (void)
3046 {
3047   ix86_option_override_internal (true, &global_options, &global_options_set);
3048 }
3049
3050 /* Remember the last target of ix86_set_current_function.  */
3051 static GTY(()) tree ix86_previous_fndecl;
3052
3053 /* Set targets globals to the default (or current #pragma GCC target
3054    if active).  Invalidate ix86_previous_fndecl cache.  */
3055
3056 void
3057 ix86_reset_previous_fndecl (void)
3058 {
3059   tree new_tree = target_option_current_node;
3060   cl_target_option_restore (&global_options, &global_options_set,
3061                             TREE_TARGET_OPTION (new_tree));
3062   if (TREE_TARGET_GLOBALS (new_tree))
3063     restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
3064   else if (new_tree == target_option_default_node)
3065     restore_target_globals (&default_target_globals);
3066   else
3067     TREE_TARGET_GLOBALS (new_tree) = save_target_globals_default_opts ();
3068   ix86_previous_fndecl = NULL_TREE;
3069 }
3070
3071 /* Add target attribute to SIMD clone NODE if needed.  */
3072
3073 void
3074 ix86_simd_clone_adjust (struct cgraph_node *node)
3075 {
3076   const char *str = NULL;
3077
3078   /* Attributes need to be adjusted for definitions, not declarations.  */
3079   if (!node->definition)
3080     return;
3081
3082   gcc_assert (node->decl == cfun->decl);
3083   switch (node->simdclone->vecsize_mangle)
3084     {
3085     case 'b':
3086       if (!TARGET_SSE2)
3087         str = "sse2";
3088       break;
3089     case 'c':
3090       if (TARGET_PREFER_AVX128)
3091         {
3092           if (!TARGET_AVX)
3093             str = "avx,prefer-vector-width=256";
3094           else
3095             str = "prefer-vector-width=256";
3096         }
3097       else if (!TARGET_AVX)
3098         str = "avx";
3099       break;
3100     case 'd':
3101       if (TARGET_PREFER_AVX128)
3102         {
3103           if (!TARGET_AVX2)
3104             str = "avx2,prefer-vector-width=256";
3105           else
3106             str = "prefer-vector-width=256";
3107         }
3108       else if (!TARGET_AVX2)
3109         str = "avx2";
3110       break;
3111     case 'e':
3112       if (TARGET_PREFER_AVX256)
3113         {
3114           if (!TARGET_AVX512F)
3115             str = "avx512f,prefer-vector-width=512";
3116           else
3117             str = "prefer-vector-width=512";
3118         }
3119       else if (!TARGET_AVX512F)
3120         str = "avx512f";
3121       break;
3122     default:
3123       gcc_unreachable ();
3124     }
3125   if (str == NULL)
3126     return;
3127   push_cfun (NULL);
3128   tree args = build_tree_list (NULL_TREE, build_string (strlen (str), str));
3129   bool ok = ix86_valid_target_attribute_p (node->decl, NULL, args, 0);
3130   gcc_assert (ok);
3131   pop_cfun ();
3132   ix86_reset_previous_fndecl ();
3133   ix86_set_current_function (node->decl);
3134 }
3135
3136
3137
3138 /* Set the func_type field from the function FNDECL.  */
3139
3140 static void
3141 ix86_set_func_type (tree fndecl)
3142 {
3143   if (cfun->machine->func_type == TYPE_UNKNOWN)
3144     {
3145       if (lookup_attribute ("interrupt",
3146                             TYPE_ATTRIBUTES (TREE_TYPE (fndecl))))
3147         {
3148           if (ix86_function_naked (fndecl))
3149             error_at (DECL_SOURCE_LOCATION (fndecl),
3150                       "interrupt and naked attributes are not compatible");
3151
3152           int nargs = 0;
3153           for (tree arg = DECL_ARGUMENTS (fndecl);
3154                arg;
3155                arg = TREE_CHAIN (arg))
3156             nargs++;
3157           cfun->machine->no_caller_saved_registers = true;
3158           cfun->machine->func_type
3159             = nargs == 2 ? TYPE_EXCEPTION : TYPE_INTERRUPT;
3160
3161           ix86_optimize_mode_switching[X86_DIRFLAG] = 1;
3162
3163           /* Only dwarf2out.c can handle -WORD(AP) as a pointer argument.  */
3164           if (write_symbols != NO_DEBUG && write_symbols != DWARF2_DEBUG)
3165             sorry ("only DWARF debug format is supported for interrupt "
3166                    "service routine");
3167         }
3168       else
3169         {
3170           cfun->machine->func_type = TYPE_NORMAL;
3171           if (lookup_attribute ("no_caller_saved_registers",
3172                                 TYPE_ATTRIBUTES (TREE_TYPE (fndecl))))
3173             cfun->machine->no_caller_saved_registers = true;
3174         }
3175     }
3176 }
3177
3178 /* Set the indirect_branch_type field from the function FNDECL.  */
3179
3180 static void
3181 ix86_set_indirect_branch_type (tree fndecl)
3182 {
3183   if (cfun->machine->indirect_branch_type == indirect_branch_unset)
3184     {
3185       tree attr = lookup_attribute ("indirect_branch",
3186                                     DECL_ATTRIBUTES (fndecl));
3187       if (attr != NULL)
3188         {
3189           tree args = TREE_VALUE (attr);
3190           if (args == NULL)
3191             gcc_unreachable ();
3192           tree cst = TREE_VALUE (args);
3193           if (strcmp (TREE_STRING_POINTER (cst), "keep") == 0)
3194             cfun->machine->indirect_branch_type = indirect_branch_keep;
3195           else if (strcmp (TREE_STRING_POINTER (cst), "thunk") == 0)
3196             cfun->machine->indirect_branch_type = indirect_branch_thunk;
3197           else if (strcmp (TREE_STRING_POINTER (cst), "thunk-inline") == 0)
3198             cfun->machine->indirect_branch_type = indirect_branch_thunk_inline;
3199           else if (strcmp (TREE_STRING_POINTER (cst), "thunk-extern") == 0)
3200             cfun->machine->indirect_branch_type = indirect_branch_thunk_extern;
3201           else
3202             gcc_unreachable ();
3203         }
3204       else
3205         cfun->machine->indirect_branch_type = ix86_indirect_branch;
3206
3207       /* -mcmodel=large is not compatible with -mindirect-branch=thunk
3208          nor -mindirect-branch=thunk-extern.  */
3209       if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC)
3210           && ((cfun->machine->indirect_branch_type
3211                == indirect_branch_thunk_extern)
3212               || (cfun->machine->indirect_branch_type
3213                   == indirect_branch_thunk)))
3214         error ("%<-mindirect-branch=%s%> and %<-mcmodel=large%> are not "
3215                "compatible",
3216                ((cfun->machine->indirect_branch_type
3217                  == indirect_branch_thunk_extern)
3218                 ? "thunk-extern" : "thunk"));
3219
3220       if (cfun->machine->indirect_branch_type != indirect_branch_keep
3221           && (cfun->machine->indirect_branch_type
3222               != indirect_branch_thunk_extern)
3223           && (flag_cf_protection & CF_RETURN))
3224         error ("%<-mindirect-branch%> and %<-fcf-protection%> are not "
3225                "compatible");
3226     }
3227
3228   if (cfun->machine->function_return_type == indirect_branch_unset)
3229     {
3230       tree attr = lookup_attribute ("function_return",
3231                                     DECL_ATTRIBUTES (fndecl));
3232       if (attr != NULL)
3233         {
3234           tree args = TREE_VALUE (attr);
3235           if (args == NULL)
3236             gcc_unreachable ();
3237           tree cst = TREE_VALUE (args);
3238           if (strcmp (TREE_STRING_POINTER (cst), "keep") == 0)
3239             cfun->machine->function_return_type = indirect_branch_keep;
3240           else if (strcmp (TREE_STRING_POINTER (cst), "thunk") == 0)
3241             cfun->machine->function_return_type = indirect_branch_thunk;
3242           else if (strcmp (TREE_STRING_POINTER (cst), "thunk-inline") == 0)
3243             cfun->machine->function_return_type = indirect_branch_thunk_inline;
3244           else if (strcmp (TREE_STRING_POINTER (cst), "thunk-extern") == 0)
3245             cfun->machine->function_return_type = indirect_branch_thunk_extern;
3246           else
3247             gcc_unreachable ();
3248         }
3249       else
3250         cfun->machine->function_return_type = ix86_function_return;
3251
3252       /* -mcmodel=large is not compatible with -mfunction-return=thunk
3253          nor -mfunction-return=thunk-extern.  */
3254       if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC)
3255           && ((cfun->machine->function_return_type
3256                == indirect_branch_thunk_extern)
3257               || (cfun->machine->function_return_type
3258                   == indirect_branch_thunk)))
3259         error ("%<-mfunction-return=%s%> and %<-mcmodel=large%> are not "
3260                "compatible",
3261                ((cfun->machine->function_return_type
3262                  == indirect_branch_thunk_extern)
3263                 ? "thunk-extern" : "thunk"));
3264
3265       if (cfun->machine->function_return_type != indirect_branch_keep
3266           && (cfun->machine->function_return_type
3267               != indirect_branch_thunk_extern)
3268           && (flag_cf_protection & CF_RETURN))
3269         error ("%<-mfunction-return%> and %<-fcf-protection%> are not "
3270                "compatible");
3271     }
3272 }
3273
3274 /* Establish appropriate back-end context for processing the function
3275    FNDECL.  The argument might be NULL to indicate processing at top
3276    level, outside of any function scope.  */
3277 void
3278 ix86_set_current_function (tree fndecl)
3279 {
3280   /* Only change the context if the function changes.  This hook is called
3281      several times in the course of compiling a function, and we don't want to
3282      slow things down too much or call target_reinit when it isn't safe.  */
3283   if (fndecl == ix86_previous_fndecl)
3284     {
3285       /* There may be 2 function bodies for the same function FNDECL,
3286          one is extern inline and one isn't.  Call ix86_set_func_type
3287          to set the func_type field.  */
3288       if (fndecl != NULL_TREE)
3289         {
3290           ix86_set_func_type (fndecl);
3291           ix86_set_indirect_branch_type (fndecl);
3292         }
3293       return;
3294     }
3295
3296   tree old_tree;
3297   if (ix86_previous_fndecl == NULL_TREE)
3298     old_tree = target_option_current_node;
3299   else if (DECL_FUNCTION_SPECIFIC_TARGET (ix86_previous_fndecl))
3300     old_tree = DECL_FUNCTION_SPECIFIC_TARGET (ix86_previous_fndecl);
3301   else
3302     old_tree = target_option_default_node;
3303
3304   if (fndecl == NULL_TREE)
3305     {
3306       if (old_tree != target_option_current_node)
3307         ix86_reset_previous_fndecl ();
3308       return;
3309     }
3310
3311   ix86_set_func_type (fndecl);
3312   ix86_set_indirect_branch_type (fndecl);
3313
3314   tree new_tree = DECL_FUNCTION_SPECIFIC_TARGET (fndecl);
3315   if (new_tree == NULL_TREE)
3316     new_tree = target_option_default_node;
3317
3318   if (old_tree != new_tree)
3319     {
3320       cl_target_option_restore (&global_options, &global_options_set,
3321                                 TREE_TARGET_OPTION (new_tree));
3322       if (TREE_TARGET_GLOBALS (new_tree))
3323         restore_target_globals (TREE_TARGET_GLOBALS (new_tree));
3324       else if (new_tree == target_option_default_node)
3325         restore_target_globals (&default_target_globals);
3326       else
3327         TREE_TARGET_GLOBALS (new_tree) = save_target_globals_default_opts ();
3328     }
3329   ix86_previous_fndecl = fndecl;
3330
3331   static bool prev_no_caller_saved_registers;
3332
3333   /* 64-bit MS and SYSV ABI have different set of call used registers.
3334      Avoid expensive re-initialization of init_regs each time we switch
3335      function context.  */
3336   if (TARGET_64BIT
3337       && (call_used_or_fixed_reg_p (SI_REG)
3338           == (cfun->machine->call_abi == MS_ABI)))
3339     reinit_regs ();
3340   /* Need to re-initialize init_regs if caller-saved registers are
3341      changed.  */
3342   else if (prev_no_caller_saved_registers
3343            != cfun->machine->no_caller_saved_registers)
3344     reinit_regs ();
3345
3346   if (cfun->machine->func_type != TYPE_NORMAL
3347       || cfun->machine->no_caller_saved_registers)
3348     {
3349       /* Don't allow SSE, MMX nor x87 instructions since they
3350          may change processor state.  */
3351       const char *isa;
3352       if (TARGET_SSE)
3353         isa = "SSE";
3354       else if (TARGET_MMX)
3355         isa = "MMX/3Dnow";
3356       else if (TARGET_80387)
3357         isa = "80387";
3358       else
3359         isa = NULL;
3360       if (isa != NULL)
3361         {
3362           if (cfun->machine->func_type != TYPE_NORMAL)
3363             sorry (cfun->machine->func_type == TYPE_EXCEPTION
3364                    ? G_("%s instructions aren%'t allowed in an"
3365                         " exception service routine")
3366                    : G_("%s instructions aren%'t allowed in an"
3367                         " interrupt service routine"),
3368                    isa);
3369           else
3370             sorry ("%s instructions aren%'t allowed in a function with "
3371                    "the %<no_caller_saved_registers%> attribute", isa);
3372           /* Don't issue the same error twice.  */
3373           cfun->machine->func_type = TYPE_NORMAL;
3374           cfun->machine->no_caller_saved_registers = false;
3375         }
3376     }
3377
3378   prev_no_caller_saved_registers
3379     = cfun->machine->no_caller_saved_registers;
3380 }
3381
3382 /* Implement the TARGET_OFFLOAD_OPTIONS hook.  */
3383 char *
3384 ix86_offload_options (void)
3385 {
3386   if (TARGET_LP64)
3387     return xstrdup ("-foffload-abi=lp64");
3388   return xstrdup ("-foffload-abi=ilp32");
3389 }
3390
3391 /* Handle "cdecl", "stdcall", "fastcall", "regparm", "thiscall",
3392    and "sseregparm" calling convention attributes;
3393    arguments as in struct attribute_spec.handler.  */
3394
3395 static tree
3396 ix86_handle_cconv_attribute (tree *node, tree name, tree args, int,
3397                              bool *no_add_attrs)
3398 {
3399   if (TREE_CODE (*node) != FUNCTION_TYPE
3400       && TREE_CODE (*node) != METHOD_TYPE
3401       && TREE_CODE (*node) != FIELD_DECL
3402       && TREE_CODE (*node) != TYPE_DECL)
3403     {
3404       warning (OPT_Wattributes, "%qE attribute only applies to functions",
3405                name);
3406       *no_add_attrs = true;
3407       return NULL_TREE;
3408     }
3409
3410   /* Can combine regparm with all attributes but fastcall, and thiscall.  */
3411   if (is_attribute_p ("regparm", name))
3412     {
3413       tree cst;
3414
3415       if (lookup_attribute ("fastcall", TYPE_ATTRIBUTES (*node)))
3416         {
3417           error ("fastcall and regparm attributes are not compatible");
3418         }
3419
3420       if (lookup_attribute ("thiscall", TYPE_ATTRIBUTES (*node)))
3421         {
3422           error ("regparam and thiscall attributes are not compatible");
3423         }
3424
3425       cst = TREE_VALUE (args);
3426       if (TREE_CODE (cst) != INTEGER_CST)
3427         {
3428           warning (OPT_Wattributes,
3429                    "%qE attribute requires an integer constant argument",
3430                    name);
3431           *no_add_attrs = true;
3432         }
3433       else if (compare_tree_int (cst, REGPARM_MAX) > 0)
3434         {
3435           warning (OPT_Wattributes, "argument to %qE attribute larger than %d",
3436                    name, REGPARM_MAX);
3437           *no_add_attrs = true;
3438         }
3439
3440       return NULL_TREE;
3441     }
3442
3443   if (TARGET_64BIT)
3444     {
3445       /* Do not warn when emulating the MS ABI.  */
3446       if ((TREE_CODE (*node) != FUNCTION_TYPE
3447            && TREE_CODE (*node) != METHOD_TYPE)
3448           || ix86_function_type_abi (*node) != MS_ABI)
3449         warning (OPT_Wattributes, "%qE attribute ignored",
3450                  name);
3451       *no_add_attrs = true;
3452       return NULL_TREE;
3453     }
3454
3455   /* Can combine fastcall with stdcall (redundant) and sseregparm.  */
3456   if (is_attribute_p ("fastcall", name))
3457     {
3458       if (lookup_attribute ("cdecl", TYPE_ATTRIBUTES (*node)))
3459         {
3460           error ("fastcall and cdecl attributes are not compatible");
3461         }
3462       if (lookup_attribute ("stdcall", TYPE_ATTRIBUTES (*node)))
3463         {
3464           error ("fastcall and stdcall attributes are not compatible");
3465         }
3466       if (lookup_attribute ("regparm", TYPE_ATTRIBUTES (*node)))
3467         {
3468           error ("fastcall and regparm attributes are not compatible");
3469         }
3470       if (lookup_attribute ("thiscall", TYPE_ATTRIBUTES (*node)))
3471         {
3472           error ("fastcall and thiscall attributes are not compatible");
3473         }
3474     }
3475
3476   /* Can combine stdcall with fastcall (redundant), regparm and
3477      sseregparm.  */
3478   else if (is_attribute_p ("stdcall", name))
3479     {
3480       if (lookup_attribute ("cdecl", TYPE_ATTRIBUTES (*node)))
3481         {
3482           error ("stdcall and cdecl attributes are not compatible");
3483         }
3484       if (lookup_attribute ("fastcall", TYPE_ATTRIBUTES (*node)))
3485         {
3486           error ("stdcall and fastcall attributes are not compatible");
3487         }
3488       if (lookup_attribute ("thiscall", TYPE_ATTRIBUTES (*node)))
3489         {
3490           error ("stdcall and thiscall attributes are not compatible");
3491         }
3492     }
3493
3494   /* Can combine cdecl with regparm and sseregparm.  */
3495   else if (is_attribute_p ("cdecl", name))
3496     {
3497       if (lookup_attribute ("stdcall", TYPE_ATTRIBUTES (*node)))
3498         {
3499           error ("stdcall and cdecl attributes are not compatible");
3500         }
3501       if (lookup_attribute ("fastcall", TYPE_ATTRIBUTES (*node)))
3502         {
3503           error ("fastcall and cdecl attributes are not compatible");
3504         }
3505       if (lookup_attribute ("thiscall", TYPE_ATTRIBUTES (*node)))
3506         {
3507           error ("cdecl and thiscall attributes are not compatible");
3508         }
3509     }
3510   else if (is_attribute_p ("thiscall", name))
3511     {
3512       if (TREE_CODE (*node) != METHOD_TYPE && pedantic)
3513         warning (OPT_Wattributes, "%qE attribute is used for non-class method",
3514                  name);
3515       if (lookup_attribute ("stdcall", TYPE_ATTRIBUTES (*node)))
3516         {
3517           error ("stdcall and thiscall attributes are not compatible");
3518         }
3519       if (lookup_attribute ("fastcall", TYPE_ATTRIBUTES (*node)))
3520         {
3521           error ("fastcall and thiscall attributes are not compatible");
3522         }
3523       if (lookup_attribute ("cdecl", TYPE_ATTRIBUTES (*node)))
3524         {
3525           error ("cdecl and thiscall attributes are not compatible");
3526         }
3527     }
3528
3529   /* Can combine sseregparm with all attributes.  */
3530
3531   return NULL_TREE;
3532 }
3533
3534 #ifndef CHECK_STACK_LIMIT
3535 #define CHECK_STACK_LIMIT (-1)
3536 #endif
3537
3538 /* The transactional memory builtins are implicitly regparm or fastcall
3539    depending on the ABI.  Override the generic do-nothing attribute that
3540    these builtins were declared with, and replace it with one of the two
3541    attributes that we expect elsewhere.  */
3542
3543 static tree
3544 ix86_handle_tm_regparm_attribute (tree *node, tree, tree,
3545                                   int flags, bool *no_add_attrs)
3546 {
3547   tree alt;
3548
3549   /* In no case do we want to add the placeholder attribute.  */
3550   *no_add_attrs = true;
3551
3552   /* The 64-bit ABI is unchanged for transactional memory.  */
3553   if (TARGET_64BIT)
3554     return NULL_TREE;
3555
3556   /* ??? Is there a better way to validate 32-bit windows?  We have
3557      cfun->machine->call_abi, but that seems to be set only for 64-bit.  */
3558   if (CHECK_STACK_LIMIT > 0)
3559     alt = tree_cons (get_identifier ("fastcall"), NULL, NULL);
3560   else
3561     {
3562       alt = tree_cons (NULL, build_int_cst (NULL, 2), NULL);
3563       alt = tree_cons (get_identifier ("regparm"), alt, NULL);
3564     }
3565   decl_attributes (node, alt, flags);
3566
3567   return NULL_TREE;
3568 }
3569
3570 /* Handle a "force_align_arg_pointer" attribute.  */
3571
3572 static tree
3573 ix86_handle_force_align_arg_pointer_attribute (tree *node, tree name,
3574                                                tree, int, bool *no_add_attrs)
3575 {
3576   if (TREE_CODE (*node) != FUNCTION_TYPE
3577       && TREE_CODE (*node) != METHOD_TYPE
3578       && TREE_CODE (*node) != FIELD_DECL
3579       && TREE_CODE (*node) != TYPE_DECL)
3580     {
3581       warning (OPT_Wattributes, "%qE attribute only applies to functions",
3582                name);
3583       *no_add_attrs = true;
3584     }
3585
3586   return NULL_TREE;
3587 }
3588
3589 /* Handle a "ms_struct" or "gcc_struct" attribute; arguments as in
3590    struct attribute_spec.handler.  */
3591
3592 static tree
3593 ix86_handle_struct_attribute (tree *node, tree name, tree, int,
3594                               bool *no_add_attrs)
3595 {
3596   tree *type = NULL;
3597   if (DECL_P (*node))
3598     {
3599       if (TREE_CODE (*node) == TYPE_DECL)
3600         type = &TREE_TYPE (*node);
3601     }
3602   else
3603     type = node;
3604
3605   if (!(type && RECORD_OR_UNION_TYPE_P (*type)))
3606     {
3607       warning (OPT_Wattributes, "%qE attribute ignored",
3608                name);
3609       *no_add_attrs = true;
3610     }
3611
3612   else if ((is_attribute_p ("ms_struct", name)
3613             && lookup_attribute ("gcc_struct", TYPE_ATTRIBUTES (*type)))
3614            || ((is_attribute_p ("gcc_struct", name)
3615                 && lookup_attribute ("ms_struct", TYPE_ATTRIBUTES (*type)))))
3616     {
3617       warning (OPT_Wattributes, "%qE incompatible attribute ignored",
3618                name);
3619       *no_add_attrs = true;
3620     }
3621
3622   return NULL_TREE;
3623 }
3624
3625 /* Handle a "callee_pop_aggregate_return" attribute; arguments as
3626    in struct attribute_spec handler.  */
3627
3628 static tree
3629 ix86_handle_callee_pop_aggregate_return (tree *node, tree name, tree args, int,
3630                                          bool *no_add_attrs)
3631 {
3632   if (TREE_CODE (*node) != FUNCTION_TYPE
3633       && TREE_CODE (*node) != METHOD_TYPE
3634       && TREE_CODE (*node) != FIELD_DECL
3635       && TREE_CODE (*node) != TYPE_DECL)
3636     {
3637       warning (OPT_Wattributes, "%qE attribute only applies to functions",
3638                name);
3639       *no_add_attrs = true;
3640       return NULL_TREE;
3641     }
3642   if (TARGET_64BIT)
3643     {
3644       warning (OPT_Wattributes, "%qE attribute only available for 32-bit",
3645                name);
3646       *no_add_attrs = true;
3647       return NULL_TREE;
3648     }
3649   if (is_attribute_p ("callee_pop_aggregate_return", name))
3650     {
3651       tree cst;
3652
3653       cst = TREE_VALUE (args);
3654       if (TREE_CODE (cst) != INTEGER_CST)
3655         {
3656           warning (OPT_Wattributes,
3657                    "%qE attribute requires an integer constant argument",
3658                    name);
3659           *no_add_attrs = true;
3660         }
3661       else if (compare_tree_int (cst, 0) != 0
3662                && compare_tree_int (cst, 1) != 0)
3663         {
3664           warning (OPT_Wattributes,
3665                    "argument to %qE attribute is neither zero, nor one",
3666                    name);
3667           *no_add_attrs = true;
3668         }
3669
3670       return NULL_TREE;
3671     }
3672
3673   return NULL_TREE;
3674 }
3675
3676 /* Handle a "ms_abi" or "sysv" attribute; arguments as in
3677    struct attribute_spec.handler.  */
3678
3679 static tree
3680 ix86_handle_abi_attribute (tree *node, tree name, tree, int,
3681                            bool *no_add_attrs)
3682 {
3683   if (TREE_CODE (*node) != FUNCTION_TYPE
3684       && TREE_CODE (*node) != METHOD_TYPE
3685       && TREE_CODE (*node) != FIELD_DECL
3686       && TREE_CODE (*node) != TYPE_DECL)
3687     {
3688       warning (OPT_Wattributes, "%qE attribute only applies to functions",
3689                name);
3690       *no_add_attrs = true;
3691       return NULL_TREE;
3692     }
3693
3694   /* Can combine regparm with all attributes but fastcall.  */
3695   if (is_attribute_p ("ms_abi", name))
3696     {
3697       if (lookup_attribute ("sysv_abi", TYPE_ATTRIBUTES (*node)))
3698         {
3699           error ("%qs and %qs attributes are not compatible",
3700                  "ms_abi", "sysv_abi");
3701         }
3702
3703       return NULL_TREE;
3704     }
3705   else if (is_attribute_p ("sysv_abi", name))
3706     {
3707       if (lookup_attribute ("ms_abi", TYPE_ATTRIBUTES (*node)))
3708         {
3709           error ("%qs and %qs attributes are not compatible",
3710                  "ms_abi", "sysv_abi");
3711         }
3712
3713       return NULL_TREE;
3714     }
3715
3716   return NULL_TREE;
3717 }
3718
3719 static tree
3720 ix86_handle_fndecl_attribute (tree *node, tree name, tree args, int,
3721                               bool *no_add_attrs)
3722 {
3723   if (TREE_CODE (*node) != FUNCTION_DECL)
3724     {
3725       warning (OPT_Wattributes, "%qE attribute only applies to functions",
3726                name);
3727       *no_add_attrs = true;
3728     }
3729
3730   if (is_attribute_p ("indirect_branch", name))
3731     {
3732       tree cst = TREE_VALUE (args);
3733       if (TREE_CODE (cst) != STRING_CST)
3734         {
3735           warning (OPT_Wattributes,
3736                    "%qE attribute requires a string constant argument",
3737                    name);
3738           *no_add_attrs = true;
3739         }
3740       else if (strcmp (TREE_STRING_POINTER (cst), "keep") != 0
3741                && strcmp (TREE_STRING_POINTER (cst), "thunk") != 0
3742                && strcmp (TREE_STRING_POINTER (cst), "thunk-inline") != 0
3743                && strcmp (TREE_STRING_POINTER (cst), "thunk-extern") != 0)
3744         {
3745           warning (OPT_Wattributes,
3746                    "argument to %qE attribute is not "
3747                    "(keep|thunk|thunk-inline|thunk-extern)", name);
3748           *no_add_attrs = true;
3749         }
3750     }
3751
3752   if (is_attribute_p ("function_return", name))
3753     {
3754       tree cst = TREE_VALUE (args);
3755       if (TREE_CODE (cst) != STRING_CST)
3756         {
3757           warning (OPT_Wattributes,
3758                    "%qE attribute requires a string constant argument",
3759                    name);
3760           *no_add_attrs = true;
3761         }
3762       else if (strcmp (TREE_STRING_POINTER (cst), "keep") != 0
3763                && strcmp (TREE_STRING_POINTER (cst), "thunk") != 0
3764                && strcmp (TREE_STRING_POINTER (cst), "thunk-inline") != 0
3765                && strcmp (TREE_STRING_POINTER (cst), "thunk-extern") != 0)
3766         {
3767           warning (OPT_Wattributes,
3768                    "argument to %qE attribute is not "
3769                    "(keep|thunk|thunk-inline|thunk-extern)", name);
3770           *no_add_attrs = true;
3771         }
3772     }
3773
3774   return NULL_TREE;
3775 }
3776
3777 static tree
3778 ix86_handle_no_caller_saved_registers_attribute (tree *, tree, tree,
3779                                                  int, bool *)
3780 {
3781   return NULL_TREE;
3782 }
3783
3784 static tree
3785 ix86_handle_interrupt_attribute (tree *node, tree, tree, int, bool *)
3786 {
3787   /* DECL_RESULT and DECL_ARGUMENTS do not exist there yet,
3788      but the function type contains args and return type data.  */
3789   tree func_type = *node;
3790   tree return_type = TREE_TYPE (func_type);
3791
3792   int nargs = 0;
3793   tree current_arg_type = TYPE_ARG_TYPES (func_type);
3794   while (current_arg_type
3795          && ! VOID_TYPE_P (TREE_VALUE (current_arg_type)))
3796     {
3797       if (nargs == 0)
3798         {
3799           if (! POINTER_TYPE_P (TREE_VALUE (current_arg_type)))
3800             error ("interrupt service routine should have a pointer "
3801                    "as the first argument");
3802         }
3803       else if (nargs == 1)
3804         {
3805           if (TREE_CODE (TREE_VALUE (current_arg_type)) != INTEGER_TYPE
3806               || TYPE_MODE (TREE_VALUE (current_arg_type)) != word_mode)
3807             error ("interrupt service routine should have %qs "
3808                    "as the second argument",
3809                    TARGET_64BIT
3810                    ? (TARGET_X32 ? "unsigned long long int"
3811                                  : "unsigned long int")
3812                    : "unsigned int");
3813         }
3814       nargs++;
3815       current_arg_type = TREE_CHAIN (current_arg_type);
3816     }
3817   if (!nargs || nargs > 2)
3818     error ("interrupt service routine can only have a pointer argument "
3819            "and an optional integer argument");
3820   if (! VOID_TYPE_P (return_type))
3821     error ("interrupt service routine must return %<void%>");
3822
3823   return NULL_TREE;
3824 }
3825
3826 /* Handle fentry_name / fentry_section attribute.  */
3827
3828 static tree
3829 ix86_handle_fentry_name (tree *node, tree name, tree args,
3830                          int, bool *no_add_attrs)
3831 {
3832   if (TREE_CODE (*node) == FUNCTION_DECL
3833       && TREE_CODE (TREE_VALUE (args)) == STRING_CST)
3834     /* Do nothing else, just set the attribute.  We'll get at
3835        it later with lookup_attribute.  */
3836     ;
3837   else
3838     {
3839       warning (OPT_Wattributes, "%qE attribute ignored", name);
3840       *no_add_attrs = true;
3841     }
3842
3843   return NULL_TREE;
3844 }
3845
3846 /* Table of valid machine attributes.  */
3847 const struct attribute_spec ix86_attribute_table[] =
3848 {
3849   /* { name, min_len, max_len, decl_req, type_req, fn_type_req,
3850        affects_type_identity, handler, exclude } */
3851   /* Stdcall attribute says callee is responsible for popping arguments
3852      if they are not variable.  */
3853   { "stdcall",   0, 0, false, true,  true,  true, ix86_handle_cconv_attribute,
3854     NULL },
3855   /* Fastcall attribute says callee is responsible for popping arguments
3856      if they are not variable.  */
3857   { "fastcall",  0, 0, false, true,  true,  true, ix86_handle_cconv_attribute,
3858     NULL },
3859   /* Thiscall attribute says callee is responsible for popping arguments
3860      if they are not variable.  */
3861   { "thiscall",  0, 0, false, true,  true,  true, ix86_handle_cconv_attribute,
3862     NULL },
3863   /* Cdecl attribute says the callee is a normal C declaration */
3864   { "cdecl",     0, 0, false, true,  true,  true, ix86_handle_cconv_attribute,
3865     NULL },
3866   /* Regparm attribute specifies how many integer arguments are to be
3867      passed in registers.  */
3868   { "regparm",   1, 1, false, true,  true,  true, ix86_handle_cconv_attribute,
3869     NULL },
3870   /* Sseregparm attribute says we are using x86_64 calling conventions
3871      for FP arguments.  */
3872   { "sseregparm", 0, 0, false, true, true,  true, ix86_handle_cconv_attribute,
3873     NULL },
3874   /* The transactional memory builtins are implicitly regparm or fastcall
3875      depending on the ABI.  Override the generic do-nothing attribute that
3876      these builtins were declared with.  */
3877   { "*tm regparm", 0, 0, false, true, true, true,
3878     ix86_handle_tm_regparm_attribute, NULL },
3879   /* force_align_arg_pointer says this function realigns the stack at entry.  */
3880   { "force_align_arg_pointer", 0, 0,
3881     false, true,  true, false, ix86_handle_force_align_arg_pointer_attribute,
3882     NULL },
3883 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
3884   { "dllimport", 0, 0, false, false, false, false, handle_dll_attribute,
3885     NULL },
3886   { "dllexport", 0, 0, false, false, false, false, handle_dll_attribute,
3887     NULL },
3888   { "shared",    0, 0, true,  false, false, false,
3889     ix86_handle_shared_attribute, NULL },
3890 #endif
3891   { "ms_struct", 0, 0, false, false,  false, false,
3892     ix86_handle_struct_attribute, NULL },
3893   { "gcc_struct", 0, 0, false, false,  false, false,
3894     ix86_handle_struct_attribute, NULL },
3895 #ifdef SUBTARGET_ATTRIBUTE_TABLE
3896   SUBTARGET_ATTRIBUTE_TABLE,
3897 #endif
3898   /* ms_abi and sysv_abi calling convention function attributes.  */
3899   { "ms_abi", 0, 0, false, true, true, true, ix86_handle_abi_attribute, NULL },
3900   { "sysv_abi", 0, 0, false, true, true, true, ix86_handle_abi_attribute,
3901     NULL },
3902   { "ms_abi va_list", 0, 0, false, false, false, false, NULL, NULL },
3903   { "sysv_abi va_list", 0, 0, false, false, false, false, NULL, NULL },
3904   { "ms_hook_prologue", 0, 0, true, false, false, false,
3905     ix86_handle_fndecl_attribute, NULL },
3906   { "callee_pop_aggregate_return", 1, 1, false, true, true, true,
3907     ix86_handle_callee_pop_aggregate_return, NULL },
3908   { "interrupt", 0, 0, false, true, true, false,
3909     ix86_handle_interrupt_attribute, NULL },
3910   { "no_caller_saved_registers", 0, 0, false, true, true, false,
3911     ix86_handle_no_caller_saved_registers_attribute, NULL },
3912   { "naked", 0, 0, true, false, false, false,
3913     ix86_handle_fndecl_attribute, NULL },
3914   { "indirect_branch", 1, 1, true, false, false, false,
3915     ix86_handle_fndecl_attribute, NULL },
3916   { "function_return", 1, 1, true, false, false, false,
3917     ix86_handle_fndecl_attribute, NULL },
3918   { "indirect_return", 0, 0, false, true, true, false,
3919     NULL, NULL },
3920   { "fentry_name", 1, 1, true, false, false, false,
3921     ix86_handle_fentry_name, NULL },
3922   { "fentry_section", 1, 1, true, false, false, false,
3923     ix86_handle_fentry_name, NULL },
3924   { "cf_check", 0, 0, true, false, false, false,
3925     ix86_handle_fndecl_attribute, NULL },
3926
3927   /* End element.  */
3928   { NULL, 0, 0, false, false, false, false, NULL, NULL }
3929 };
3930
3931 #include "gt-i386-options.h"