lib/Analysis/TargetLibraryInfo.cpp

   1 //===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file implements the TargetLibraryInfo class.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "llvm/Analysis/TargetLibraryInfo.h"
  14 #include "llvm/ADT/Triple.h"
  15 #include "llvm/IR/Constants.h"
  16 #include "llvm/Support/CommandLine.h"
  17 using namespace llvm;
  18
  19 static cl::opt<TargetLibraryInfoImpl::VectorLibrary> ClVectorLibrary(
  20     "vector-library", cl::Hidden, cl::desc("Vector functions library"),
  21     cl::init(TargetLibraryInfoImpl::NoLibrary),
  22     cl::values(clEnumValN(TargetLibraryInfoImpl::NoLibrary, "none",
  23                           "No vector functions library"),
  24                clEnumValN(TargetLibraryInfoImpl::Accelerate, "Accelerate",
  25                           "Accelerate framework"),
  26                clEnumValN(TargetLibraryInfoImpl::MASSV, "MASSV",
  27                           "IBM MASS vector library"),
  28                clEnumValN(TargetLibraryInfoImpl::SVML, "SVML",
  29                           "Intel SVML library")));
  30
  31 StringLiteral const TargetLibraryInfoImpl::StandardNames[LibFunc::NumLibFuncs] =
  32     {
  33 #define TLI_DEFINE_STRING
  34 #include "llvm/Analysis/TargetLibraryInfo.def"
  35 };
  36
  37 static bool hasSinCosPiStret(const Triple &T) {
  38   // Only Darwin variants have _stret versions of combined trig functions.
  39   if (!T.isOSDarwin())
  40     return false;
  41
  42   // The ABI is rather complicated on x86, so don't do anything special there.
  43   if (T.getArch() == Triple::x86)
  44     return false;
  45
  46   if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
  47     return false;
  48
  49   if (T.isiOS() && T.isOSVersionLT(7, 0))
  50     return false;
  51
  52   return true;
  53 }
  54
  55 static bool hasBcmp(const Triple &TT) {
  56   // Posix removed support from bcmp() in 2001, but the glibc and several
  57   // implementations of the libc still have it.
  58   if (TT.isOSLinux())
  59     return TT.isGNUEnvironment() || TT.isMusl();
  60   // Both NetBSD and OpenBSD are planning to remove the function. Windows does
  61   // not have it.
  62   return TT.isOSFreeBSD() || TT.isOSSolaris();
  63 }
  64
  65 /// Initialize the set of available library functions based on the specified
  66 /// target triple. This should be carefully written so that a missing target
  67 /// triple gets a sane set of defaults.
  68 static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
  69                        ArrayRef<StringLiteral> StandardNames) {
  70   // Verify that the StandardNames array is in alphabetical order.
  71   assert(std::is_sorted(StandardNames.begin(), StandardNames.end(),
  72                         [](StringRef LHS, StringRef RHS) {
  73                           return LHS < RHS;
  74                         }) &&
  75          "TargetLibraryInfoImpl function names must be sorted");
  76
  77   // Set IO unlocked variants as unavailable
  78   // Set them as available per system below
  79   TLI.setUnavailable(LibFunc_getchar_unlocked);
  80   TLI.setUnavailable(LibFunc_putc_unlocked);
  81   TLI.setUnavailable(LibFunc_putchar_unlocked);
  82   TLI.setUnavailable(LibFunc_fputc_unlocked);
  83   TLI.setUnavailable(LibFunc_fgetc_unlocked);
  84   TLI.setUnavailable(LibFunc_fread_unlocked);
  85   TLI.setUnavailable(LibFunc_fwrite_unlocked);
  86   TLI.setUnavailable(LibFunc_fputs_unlocked);
  87   TLI.setUnavailable(LibFunc_fgets_unlocked);
  88
  89   bool ShouldExtI32Param = false, ShouldExtI32Return = false,
  90        ShouldSignExtI32Param = false;
  91   // PowerPC64, Sparc64, SystemZ need signext/zeroext on i32 parameters and
  92   // returns corresponding to C-level ints and unsigned ints.
  93   if (T.isPPC64() || T.getArch() == Triple::sparcv9 ||
  94       T.getArch() == Triple::systemz) {
  95     ShouldExtI32Param = true;
  96     ShouldExtI32Return = true;
  97   }
  98   // Mips, on the other hand, needs signext on i32 parameters corresponding
  99   // to both signed and unsigned ints.
 100   if (T.isMIPS()) {
 101     ShouldSignExtI32Param = true;
 102   }
 103   TLI.setShouldExtI32Param(ShouldExtI32Param);
 104   TLI.setShouldExtI32Return(ShouldExtI32Return);
 105   TLI.setShouldSignExtI32Param(ShouldSignExtI32Param);
 106
 107   if (T.getArch() == Triple::r600 ||
 108       T.getArch() == Triple::amdgcn) {
 109     TLI.setUnavailable(LibFunc_ldexp);
 110     TLI.setUnavailable(LibFunc_ldexpf);
 111     TLI.setUnavailable(LibFunc_ldexpl);
 112     TLI.setUnavailable(LibFunc_exp10);
 113     TLI.setUnavailable(LibFunc_exp10f);
 114     TLI.setUnavailable(LibFunc_exp10l);
 115     TLI.setUnavailable(LibFunc_log10);
 116     TLI.setUnavailable(LibFunc_log10f);
 117     TLI.setUnavailable(LibFunc_log10l);
 118     TLI.setUnavailable(LibFunc_printf);
 119   }
 120
 121   // There are no library implementations of memcpy and memset for AMD gpus and
 122   // these can be difficult to lower in the backend.
 123   if (T.getArch() == Triple::r600 ||
 124       T.getArch() == Triple::amdgcn) {
 125     TLI.setUnavailable(LibFunc_memcpy);
 126     TLI.setUnavailable(LibFunc_memset);
 127     TLI.setUnavailable(LibFunc_memset_pattern16);
 128     return;
 129   }
 130
 131   // memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
 132   // All versions of watchOS support it.
 133   if (T.isMacOSX()) {
 134     // available IO unlocked variants on Mac OS X
 135     TLI.setAvailable(LibFunc_getc_unlocked);
 136     TLI.setAvailable(LibFunc_getchar_unlocked);
 137     TLI.setAvailable(LibFunc_putc_unlocked);
 138     TLI.setAvailable(LibFunc_putchar_unlocked);
 139
 140     if (T.isMacOSXVersionLT(10, 5))
 141       TLI.setUnavailable(LibFunc_memset_pattern16);
 142   } else if (T.isiOS()) {
 143     if (T.isOSVersionLT(3, 0))
 144       TLI.setUnavailable(LibFunc_memset_pattern16);
 145   } else if (!T.isWatchOS()) {
 146     TLI.setUnavailable(LibFunc_memset_pattern16);
 147   }
 148
 149   if (!hasSinCosPiStret(T)) {
 150     TLI.setUnavailable(LibFunc_sinpi);
 151     TLI.setUnavailable(LibFunc_sinpif);
 152     TLI.setUnavailable(LibFunc_cospi);
 153     TLI.setUnavailable(LibFunc_cospif);
 154     TLI.setUnavailable(LibFunc_sincospi_stret);
 155     TLI.setUnavailable(LibFunc_sincospif_stret);
 156   }
 157
 158   if (!hasBcmp(T))
 159     TLI.setUnavailable(LibFunc_bcmp);
 160
 161   if (T.isMacOSX() && T.getArch() == Triple::x86 &&
 162       !T.isMacOSXVersionLT(10, 7)) {
 163     // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
 164     // we don't care about) have two versions; on recent OSX, the one we want
 165     // has a $UNIX2003 suffix. The two implementations are identical except
 166     // for the return value in some edge cases.  However, we don't want to
 167     // generate code that depends on the old symbols.
 168     TLI.setAvailableWithName(LibFunc_fwrite, "fwrite$UNIX2003");
 169     TLI.setAvailableWithName(LibFunc_fputs, "fputs$UNIX2003");
 170   }
 171
 172   // iprintf and friends are only available on XCore, TCE, and Emscripten.
 173   if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce &&
 174       T.getOS() != Triple::Emscripten) {
 175     TLI.setUnavailable(LibFunc_iprintf);
 176     TLI.setUnavailable(LibFunc_siprintf);
 177     TLI.setUnavailable(LibFunc_fiprintf);
 178   }
 179
 180   // __small_printf and friends are only available on Emscripten.
 181   if (T.getOS() != Triple::Emscripten) {
 182     TLI.setUnavailable(LibFunc_small_printf);
 183     TLI.setUnavailable(LibFunc_small_sprintf);
 184     TLI.setUnavailable(LibFunc_small_fprintf);
 185   }
 186
 187   if (T.isOSWindows() && !T.isOSCygMing()) {
 188     // XXX: The earliest documentation available at the moment is for VS2015/VC19:
 189     // https://docs.microsoft.com/en-us/cpp/c-runtime-library/floating-point-support?view=vs-2015
 190     // XXX: In order to use an MSVCRT older than VC19,
 191     // the specific library version must be explicit in the target triple,
 192     // e.g., x86_64-pc-windows-msvc18.
 193     bool hasPartialC99 = true;
 194     if (T.isKnownWindowsMSVCEnvironment()) {
 195       unsigned Major, Minor, Micro;
 196       T.getEnvironmentVersion(Major, Minor, Micro);
 197       hasPartialC99 = (Major == 0 || Major >= 19);
 198     }
 199
 200     // Latest targets support C89 math functions, in part.
 201     bool isARM = (T.getArch() == Triple::aarch64 ||
 202                   T.getArch() == Triple::arm);
 203     bool hasPartialFloat = (isARM ||
 204                             T.getArch() == Triple::x86_64);
 205
 206     // Win32 does not support float C89 math functions, in general.
 207     if (!hasPartialFloat) {
 208       TLI.setUnavailable(LibFunc_acosf);
 209       TLI.setUnavailable(LibFunc_asinf);
 210       TLI.setUnavailable(LibFunc_atan2f);
 211       TLI.setUnavailable(LibFunc_atanf);
 212       TLI.setUnavailable(LibFunc_ceilf);
 213       TLI.setUnavailable(LibFunc_cosf);
 214       TLI.setUnavailable(LibFunc_coshf);
 215       TLI.setUnavailable(LibFunc_expf);
 216       TLI.setUnavailable(LibFunc_floorf);
 217       TLI.setUnavailable(LibFunc_fmodf);
 218       TLI.setUnavailable(LibFunc_log10f);
 219       TLI.setUnavailable(LibFunc_logf);
 220       TLI.setUnavailable(LibFunc_modff);
 221       TLI.setUnavailable(LibFunc_powf);
 222       TLI.setUnavailable(LibFunc_sinf);
 223       TLI.setUnavailable(LibFunc_sinhf);
 224       TLI.setUnavailable(LibFunc_sqrtf);
 225       TLI.setUnavailable(LibFunc_tanf);
 226       TLI.setUnavailable(LibFunc_tanhf);
 227     }
 228     if (!isARM)
 229       TLI.setUnavailable(LibFunc_fabsf);
 230     TLI.setUnavailable(LibFunc_frexpf);
 231     TLI.setUnavailable(LibFunc_ldexpf);
 232
 233     // Win32 does not support long double C89 math functions.
 234     TLI.setUnavailable(LibFunc_acosl);
 235     TLI.setUnavailable(LibFunc_asinl);
 236     TLI.setUnavailable(LibFunc_atan2l);
 237     TLI.setUnavailable(LibFunc_atanl);
 238     TLI.setUnavailable(LibFunc_ceill);
 239     TLI.setUnavailable(LibFunc_cosl);
 240     TLI.setUnavailable(LibFunc_coshl);
 241     TLI.setUnavailable(LibFunc_expl);
 242     TLI.setUnavailable(LibFunc_fabsl);
 243     TLI.setUnavailable(LibFunc_floorl);
 244     TLI.setUnavailable(LibFunc_fmodl);
 245     TLI.setUnavailable(LibFunc_frexpl);
 246     TLI.setUnavailable(LibFunc_ldexpl);
 247     TLI.setUnavailable(LibFunc_log10l);
 248     TLI.setUnavailable(LibFunc_logl);
 249     TLI.setUnavailable(LibFunc_modfl);
 250     TLI.setUnavailable(LibFunc_powl);
 251     TLI.setUnavailable(LibFunc_sinl);
 252     TLI.setUnavailable(LibFunc_sinhl);
 253     TLI.setUnavailable(LibFunc_sqrtl);
 254     TLI.setUnavailable(LibFunc_tanl);
 255     TLI.setUnavailable(LibFunc_tanhl);
 256
 257     // Win32 does not fully support C99 math functions.
 258     if (!hasPartialC99) {
 259       TLI.setUnavailable(LibFunc_acosh);
 260       TLI.setUnavailable(LibFunc_acoshf);
 261       TLI.setUnavailable(LibFunc_asinh);
 262       TLI.setUnavailable(LibFunc_asinhf);
 263       TLI.setUnavailable(LibFunc_atanh);
 264       TLI.setUnavailable(LibFunc_atanhf);
 265       TLI.setAvailableWithName(LibFunc_cabs, "_cabs");
 266       TLI.setUnavailable(LibFunc_cabsf);
 267       TLI.setUnavailable(LibFunc_cbrt);
 268       TLI.setUnavailable(LibFunc_cbrtf);
 269       TLI.setAvailableWithName(LibFunc_copysign, "_copysign");
 270       TLI.setAvailableWithName(LibFunc_copysignf, "_copysignf");
 271       TLI.setUnavailable(LibFunc_exp2);
 272       TLI.setUnavailable(LibFunc_exp2f);
 273       TLI.setUnavailable(LibFunc_expm1);
 274       TLI.setUnavailable(LibFunc_expm1f);
 275       TLI.setUnavailable(LibFunc_fmax);
 276       TLI.setUnavailable(LibFunc_fmaxf);
 277       TLI.setUnavailable(LibFunc_fmin);
 278       TLI.setUnavailable(LibFunc_fminf);
 279       TLI.setUnavailable(LibFunc_log1p);
 280       TLI.setUnavailable(LibFunc_log1pf);
 281       TLI.setUnavailable(LibFunc_log2);
 282       TLI.setUnavailable(LibFunc_log2f);
 283       TLI.setAvailableWithName(LibFunc_logb, "_logb");
 284       if (hasPartialFloat)
 285         TLI.setAvailableWithName(LibFunc_logbf, "_logbf");
 286       else
 287         TLI.setUnavailable(LibFunc_logbf);
 288       TLI.setUnavailable(LibFunc_rint);
 289       TLI.setUnavailable(LibFunc_rintf);
 290       TLI.setUnavailable(LibFunc_round);
 291       TLI.setUnavailable(LibFunc_roundf);
 292       TLI.setUnavailable(LibFunc_trunc);
 293       TLI.setUnavailable(LibFunc_truncf);
 294     }
 295
 296     // Win32 does not support long double C99 math functions.
 297     TLI.setUnavailable(LibFunc_acoshl);
 298     TLI.setUnavailable(LibFunc_asinhl);
 299     TLI.setUnavailable(LibFunc_atanhl);
 300     TLI.setUnavailable(LibFunc_cabsl);
 301     TLI.setUnavailable(LibFunc_cbrtl);
 302     TLI.setUnavailable(LibFunc_copysignl);
 303     TLI.setUnavailable(LibFunc_exp2l);
 304     TLI.setUnavailable(LibFunc_expm1l);
 305     TLI.setUnavailable(LibFunc_fmaxl);
 306     TLI.setUnavailable(LibFunc_fminl);
 307     TLI.setUnavailable(LibFunc_log1pl);
 308     TLI.setUnavailable(LibFunc_log2l);
 309     TLI.setUnavailable(LibFunc_logbl);
 310     TLI.setUnavailable(LibFunc_nearbyintl);
 311     TLI.setUnavailable(LibFunc_rintl);
 312     TLI.setUnavailable(LibFunc_roundl);
 313     TLI.setUnavailable(LibFunc_truncl);
 314
 315     // Win32 does not support these functions, but
 316     // they are generally available on POSIX-compliant systems.
 317     TLI.setUnavailable(LibFunc_access);
 318     TLI.setUnavailable(LibFunc_bcmp);
 319     TLI.setUnavailable(LibFunc_bcopy);
 320     TLI.setUnavailable(LibFunc_bzero);
 321     TLI.setUnavailable(LibFunc_chmod);
 322     TLI.setUnavailable(LibFunc_chown);
 323     TLI.setUnavailable(LibFunc_closedir);
 324     TLI.setUnavailable(LibFunc_ctermid);
 325     TLI.setUnavailable(LibFunc_fdopen);
 326     TLI.setUnavailable(LibFunc_ffs);
 327     TLI.setUnavailable(LibFunc_fileno);
 328     TLI.setUnavailable(LibFunc_flockfile);
 329     TLI.setUnavailable(LibFunc_fseeko);
 330     TLI.setUnavailable(LibFunc_fstat);
 331     TLI.setUnavailable(LibFunc_fstatvfs);
 332     TLI.setUnavailable(LibFunc_ftello);
 333     TLI.setUnavailable(LibFunc_ftrylockfile);
 334     TLI.setUnavailable(LibFunc_funlockfile);
 335     TLI.setUnavailable(LibFunc_getitimer);
 336     TLI.setUnavailable(LibFunc_getlogin_r);
 337     TLI.setUnavailable(LibFunc_getpwnam);
 338     TLI.setUnavailable(LibFunc_gettimeofday);
 339     TLI.setUnavailable(LibFunc_htonl);
 340     TLI.setUnavailable(LibFunc_htons);
 341     TLI.setUnavailable(LibFunc_lchown);
 342     TLI.setUnavailable(LibFunc_lstat);
 343     TLI.setUnavailable(LibFunc_memccpy);
 344     TLI.setUnavailable(LibFunc_mkdir);
 345     TLI.setUnavailable(LibFunc_ntohl);
 346     TLI.setUnavailable(LibFunc_ntohs);
 347     TLI.setUnavailable(LibFunc_open);
 348     TLI.setUnavailable(LibFunc_opendir);
 349     TLI.setUnavailable(LibFunc_pclose);
 350     TLI.setUnavailable(LibFunc_popen);
 351     TLI.setUnavailable(LibFunc_pread);
 352     TLI.setUnavailable(LibFunc_pwrite);
 353     TLI.setUnavailable(LibFunc_read);
 354     TLI.setUnavailable(LibFunc_readlink);
 355     TLI.setUnavailable(LibFunc_realpath);
 356     TLI.setUnavailable(LibFunc_rmdir);
 357     TLI.setUnavailable(LibFunc_setitimer);
 358     TLI.setUnavailable(LibFunc_stat);
 359     TLI.setUnavailable(LibFunc_statvfs);
 360     TLI.setUnavailable(LibFunc_stpcpy);
 361     TLI.setUnavailable(LibFunc_stpncpy);
 362     TLI.setUnavailable(LibFunc_strcasecmp);
 363     TLI.setUnavailable(LibFunc_strncasecmp);
 364     TLI.setUnavailable(LibFunc_times);
 365     TLI.setUnavailable(LibFunc_uname);
 366     TLI.setUnavailable(LibFunc_unlink);
 367     TLI.setUnavailable(LibFunc_unsetenv);
 368     TLI.setUnavailable(LibFunc_utime);
 369     TLI.setUnavailable(LibFunc_utimes);
 370     TLI.setUnavailable(LibFunc_write);
 371   }
 372
 373   switch (T.getOS()) {
 374   case Triple::MacOSX:
 375     // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0
 376     // and their names are __exp10 and __exp10f. exp10l is not available on
 377     // OS X or iOS.
 378     TLI.setUnavailable(LibFunc_exp10l);
 379     if (T.isMacOSXVersionLT(10, 9)) {
 380       TLI.setUnavailable(LibFunc_exp10);
 381       TLI.setUnavailable(LibFunc_exp10f);
 382     } else {
 383       TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
 384       TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
 385     }
 386     break;
 387   case Triple::IOS:
 388   case Triple::TvOS:
 389   case Triple::WatchOS:
 390     TLI.setUnavailable(LibFunc_exp10l);
 391     if (!T.isWatchOS() && (T.isOSVersionLT(7, 0) ||
 392                            (T.isOSVersionLT(9, 0) &&
 393                             (T.getArch() == Triple::x86 ||
 394                              T.getArch() == Triple::x86_64)))) {
 395       TLI.setUnavailable(LibFunc_exp10);
 396       TLI.setUnavailable(LibFunc_exp10f);
 397     } else {
 398       TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
 399       TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
 400     }
 401     break;
 402   case Triple::Linux:
 403     // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
 404     // buggy prior to glibc version 2.18. Until this version is widely deployed
 405     // or we have a reasonable detection strategy, we cannot use exp10 reliably
 406     // on Linux.
 407     //
 408     // Fall through to disable all of them.
 409     LLVM_FALLTHROUGH;
 410   default:
 411     TLI.setUnavailable(LibFunc_exp10);
 412     TLI.setUnavailable(LibFunc_exp10f);
 413     TLI.setUnavailable(LibFunc_exp10l);
 414   }
 415
 416   // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
 417   // Linux (GLIBC):
 418   // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
 419   // http://svn.freebsd.org/base/head/lib/libc/string/ffsl.c
 420   // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
 421   switch (T.getOS()) {
 422   case Triple::Darwin:
 423   case Triple::MacOSX:
 424   case Triple::IOS:
 425   case Triple::TvOS:
 426   case Triple::WatchOS:
 427   case Triple::FreeBSD:
 428   case Triple::Linux:
 429     break;
 430   default:
 431     TLI.setUnavailable(LibFunc_ffsl);
 432   }
 433
 434   // ffsll is available on at least FreeBSD and Linux (GLIBC):
 435   // http://svn.freebsd.org/base/head/lib/libc/string/ffsll.c
 436   // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
 437   switch (T.getOS()) {
 438   case Triple::Darwin:
 439   case Triple::MacOSX:
 440   case Triple::IOS:
 441   case Triple::TvOS:
 442   case Triple::WatchOS:
 443   case Triple::FreeBSD:
 444   case Triple::Linux:
 445     break;
 446   default:
 447     TLI.setUnavailable(LibFunc_ffsll);
 448   }
 449
 450   // The following functions are available on at least FreeBSD:
 451   // http://svn.freebsd.org/base/head/lib/libc/string/fls.c
 452   // http://svn.freebsd.org/base/head/lib/libc/string/flsl.c
 453   // http://svn.freebsd.org/base/head/lib/libc/string/flsll.c
 454   if (!T.isOSFreeBSD()) {
 455     TLI.setUnavailable(LibFunc_fls);
 456     TLI.setUnavailable(LibFunc_flsl);
 457     TLI.setUnavailable(LibFunc_flsll);
 458   }
 459
 460   // The following functions are only available on GNU/Linux (using glibc).
 461   // Linux variants without glibc (eg: bionic, musl) may have some subset.
 462   if (!T.isOSLinux() || !T.isGNUEnvironment()) {
 463     TLI.setUnavailable(LibFunc_dunder_strdup);
 464     TLI.setUnavailable(LibFunc_dunder_strtok_r);
 465     TLI.setUnavailable(LibFunc_dunder_isoc99_scanf);
 466     TLI.setUnavailable(LibFunc_dunder_isoc99_sscanf);
 467     TLI.setUnavailable(LibFunc_under_IO_getc);
 468     TLI.setUnavailable(LibFunc_under_IO_putc);
 469     // But, Android and musl have memalign.
 470     if (!T.isAndroid() && !T.isMusl())
 471       TLI.setUnavailable(LibFunc_memalign);
 472     TLI.setUnavailable(LibFunc_fopen64);
 473     TLI.setUnavailable(LibFunc_fseeko64);
 474     TLI.setUnavailable(LibFunc_fstat64);
 475     TLI.setUnavailable(LibFunc_fstatvfs64);
 476     TLI.setUnavailable(LibFunc_ftello64);
 477     TLI.setUnavailable(LibFunc_lstat64);
 478     TLI.setUnavailable(LibFunc_open64);
 479     TLI.setUnavailable(LibFunc_stat64);
 480     TLI.setUnavailable(LibFunc_statvfs64);
 481     TLI.setUnavailable(LibFunc_tmpfile64);
 482
 483     // Relaxed math functions are included in math-finite.h on Linux (GLIBC).
 484     TLI.setUnavailable(LibFunc_acos_finite);
 485     TLI.setUnavailable(LibFunc_acosf_finite);
 486     TLI.setUnavailable(LibFunc_acosl_finite);
 487     TLI.setUnavailable(LibFunc_acosh_finite);
 488     TLI.setUnavailable(LibFunc_acoshf_finite);
 489     TLI.setUnavailable(LibFunc_acoshl_finite);
 490     TLI.setUnavailable(LibFunc_asin_finite);
 491     TLI.setUnavailable(LibFunc_asinf_finite);
 492     TLI.setUnavailable(LibFunc_asinl_finite);
 493     TLI.setUnavailable(LibFunc_atan2_finite);
 494     TLI.setUnavailable(LibFunc_atan2f_finite);
 495     TLI.setUnavailable(LibFunc_atan2l_finite);
 496     TLI.setUnavailable(LibFunc_atanh_finite);
 497     TLI.setUnavailable(LibFunc_atanhf_finite);
 498     TLI.setUnavailable(LibFunc_atanhl_finite);
 499     TLI.setUnavailable(LibFunc_cosh_finite);
 500     TLI.setUnavailable(LibFunc_coshf_finite);
 501     TLI.setUnavailable(LibFunc_coshl_finite);
 502     TLI.setUnavailable(LibFunc_exp10_finite);
 503     TLI.setUnavailable(LibFunc_exp10f_finite);
 504     TLI.setUnavailable(LibFunc_exp10l_finite);
 505     TLI.setUnavailable(LibFunc_exp2_finite);
 506     TLI.setUnavailable(LibFunc_exp2f_finite);
 507     TLI.setUnavailable(LibFunc_exp2l_finite);
 508     TLI.setUnavailable(LibFunc_exp_finite);
 509     TLI.setUnavailable(LibFunc_expf_finite);
 510     TLI.setUnavailable(LibFunc_expl_finite);
 511     TLI.setUnavailable(LibFunc_log10_finite);
 512     TLI.setUnavailable(LibFunc_log10f_finite);
 513     TLI.setUnavailable(LibFunc_log10l_finite);
 514     TLI.setUnavailable(LibFunc_log2_finite);
 515     TLI.setUnavailable(LibFunc_log2f_finite);
 516     TLI.setUnavailable(LibFunc_log2l_finite);
 517     TLI.setUnavailable(LibFunc_log_finite);
 518     TLI.setUnavailable(LibFunc_logf_finite);
 519     TLI.setUnavailable(LibFunc_logl_finite);
 520     TLI.setUnavailable(LibFunc_pow_finite);
 521     TLI.setUnavailable(LibFunc_powf_finite);
 522     TLI.setUnavailable(LibFunc_powl_finite);
 523     TLI.setUnavailable(LibFunc_sinh_finite);
 524     TLI.setUnavailable(LibFunc_sinhf_finite);
 525     TLI.setUnavailable(LibFunc_sinhl_finite);
 526   }
 527
 528   if ((T.isOSLinux() && T.isGNUEnvironment()) ||
 529       (T.isAndroid() && !T.isAndroidVersionLT(28))) {
 530     // available IO unlocked variants on GNU/Linux and Android P or later
 531     TLI.setAvailable(LibFunc_getc_unlocked);
 532     TLI.setAvailable(LibFunc_getchar_unlocked);
 533     TLI.setAvailable(LibFunc_putc_unlocked);
 534     TLI.setAvailable(LibFunc_putchar_unlocked);
 535     TLI.setAvailable(LibFunc_fputc_unlocked);
 536     TLI.setAvailable(LibFunc_fgetc_unlocked);
 537     TLI.setAvailable(LibFunc_fread_unlocked);
 538     TLI.setAvailable(LibFunc_fwrite_unlocked);
 539     TLI.setAvailable(LibFunc_fputs_unlocked);
 540     TLI.setAvailable(LibFunc_fgets_unlocked);
 541   }
 542
 543   // As currently implemented in clang, NVPTX code has no standard library to
 544   // speak of.  Headers provide a standard-ish library implementation, but many
 545   // of the signatures are wrong -- for example, many libm functions are not
 546   // extern "C".
 547   //
 548   // libdevice, an IR library provided by nvidia, is linked in by the front-end,
 549   // but only used functions are provided to llvm.  Moreover, most of the
 550   // functions in libdevice don't map precisely to standard library functions.
 551   //
 552   // FIXME: Having no standard library prevents e.g. many fastmath
 553   // optimizations, so this situation should be fixed.
 554   if (T.isNVPTX()) {
 555     TLI.disableAllFunctions();
 556     TLI.setAvailable(LibFunc_nvvm_reflect);
 557   } else {
 558     TLI.setUnavailable(LibFunc_nvvm_reflect);
 559   }
 560
 561   TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
 562 }
 563
 564 TargetLibraryInfoImpl::TargetLibraryInfoImpl() {
 565   // Default to everything being available.
 566   memset(AvailableArray, -1, sizeof(AvailableArray));
 567
 568   initialize(*this, Triple(), StandardNames);
 569 }
 570
 571 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) {
 572   // Default to everything being available.
 573   memset(AvailableArray, -1, sizeof(AvailableArray));
 574
 575   initialize(*this, T, StandardNames);
 576 }
 577
 578 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI)
 579     : CustomNames(TLI.CustomNames), ShouldExtI32Param(TLI.ShouldExtI32Param),
 580       ShouldExtI32Return(TLI.ShouldExtI32Return),
 581       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param) {
 582   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
 583   VectorDescs = TLI.VectorDescs;
 584   ScalarDescs = TLI.ScalarDescs;
 585 }
 586
 587 TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI)
 588     : CustomNames(std::move(TLI.CustomNames)),
 589       ShouldExtI32Param(TLI.ShouldExtI32Param),
 590       ShouldExtI32Return(TLI.ShouldExtI32Return),
 591       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param) {
 592   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
 593             AvailableArray);
 594   VectorDescs = TLI.VectorDescs;
 595   ScalarDescs = TLI.ScalarDescs;
 596 }
 597
 598 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) {
 599   CustomNames = TLI.CustomNames;
 600   ShouldExtI32Param = TLI.ShouldExtI32Param;
 601   ShouldExtI32Return = TLI.ShouldExtI32Return;
 602   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
 603   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
 604   return *this;
 605 }
 606
 607 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) {
 608   CustomNames = std::move(TLI.CustomNames);
 609   ShouldExtI32Param = TLI.ShouldExtI32Param;
 610   ShouldExtI32Return = TLI.ShouldExtI32Return;
 611   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
 612   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
 613             AvailableArray);
 614   return *this;
 615 }
 616
 617 static StringRef sanitizeFunctionName(StringRef funcName) {
 618   // Filter out empty names and names containing null bytes, those can't be in
 619   // our table.
 620   if (funcName.empty() || funcName.find('\0') != StringRef::npos)
 621     return StringRef();
 622
 623   // Check for \01 prefix that is used to mangle __asm declarations and
 624   // strip it if present.
 625   return GlobalValue::dropLLVMManglingEscape(funcName);
 626 }
 627
 628 bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName, LibFunc &F) const {
 629   funcName = sanitizeFunctionName(funcName);
 630   if (funcName.empty())
 631     return false;
 632
 633   const auto *Start = std::begin(StandardNames);
 634   const auto *End = std::end(StandardNames);
 635   const auto *I = std::lower_bound(Start, End, funcName);
 636   if (I != End && *I == funcName) {
 637     F = (LibFunc)(I - Start);
 638     return true;
 639   }
 640   return false;
 641 }
 642
 643 bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy,
 644                                                    LibFunc F,
 645                                                    const DataLayout *DL) const {
 646   LLVMContext &Ctx = FTy.getContext();
 647   Type *PCharTy = Type::getInt8PtrTy(Ctx);
 648   Type *SizeTTy = DL ? DL->getIntPtrType(Ctx, /*AS=*/0) : nullptr;
 649   auto IsSizeTTy = [SizeTTy](Type *Ty) {
 650     return SizeTTy ? Ty == SizeTTy : Ty->isIntegerTy();
 651   };
 652   unsigned NumParams = FTy.getNumParams();
 653
 654   switch (F) {
 655   case LibFunc_execl:
 656   case LibFunc_execlp:
 657   case LibFunc_execle:
 658     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 659             FTy.getParamType(1)->isPointerTy() &&
 660             FTy.getReturnType()->isIntegerTy(32));
 661   case LibFunc_execv:
 662   case LibFunc_execvp:
 663     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
 664             FTy.getParamType(1)->isPointerTy() &&
 665             FTy.getReturnType()->isIntegerTy(32));
 666   case LibFunc_execvP:
 667   case LibFunc_execvpe:
 668   case LibFunc_execve:
 669     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 670             FTy.getParamType(1)->isPointerTy() &&
 671             FTy.getParamType(2)->isPointerTy() &&
 672             FTy.getReturnType()->isIntegerTy(32));
 673   case LibFunc_strlen:
 674     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
 675             FTy.getReturnType()->isIntegerTy());
 676
 677   case LibFunc_strchr:
 678   case LibFunc_strrchr:
 679     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 680             FTy.getParamType(0) == FTy.getReturnType() &&
 681             FTy.getParamType(1)->isIntegerTy());
 682
 683   case LibFunc_strtol:
 684   case LibFunc_strtod:
 685   case LibFunc_strtof:
 686   case LibFunc_strtoul:
 687   case LibFunc_strtoll:
 688   case LibFunc_strtold:
 689   case LibFunc_strtoull:
 690     return ((NumParams == 2 || NumParams == 3) &&
 691             FTy.getParamType(0)->isPointerTy() &&
 692             FTy.getParamType(1)->isPointerTy());
 693   case LibFunc_strcat_chk:
 694     --NumParams;
 695     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 696       return false;
 697     LLVM_FALLTHROUGH;
 698   case LibFunc_strcat:
 699     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 700             FTy.getParamType(0) == FTy.getReturnType() &&
 701             FTy.getParamType(1) == FTy.getReturnType());
 702
 703   case LibFunc_strncat_chk:
 704     --NumParams;
 705     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 706       return false;
 707     LLVM_FALLTHROUGH;
 708   case LibFunc_strncat:
 709     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
 710             FTy.getParamType(0) == FTy.getReturnType() &&
 711             FTy.getParamType(1) == FTy.getReturnType() &&
 712             IsSizeTTy(FTy.getParamType(2)));
 713
 714   case LibFunc_strcpy_chk:
 715   case LibFunc_stpcpy_chk:
 716     --NumParams;
 717     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 718       return false;
 719     LLVM_FALLTHROUGH;
 720   case LibFunc_strcpy:
 721   case LibFunc_stpcpy:
 722     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(0) &&
 723             FTy.getParamType(0) == FTy.getParamType(1) &&
 724             FTy.getParamType(0) == PCharTy);
 725
 726   case LibFunc_strlcat_chk:
 727   case LibFunc_strlcpy_chk:
 728     --NumParams;
 729     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 730       return false;
 731     LLVM_FALLTHROUGH;
 732   case LibFunc_strlcat:
 733   case LibFunc_strlcpy:
 734     return NumParams == 3 && IsSizeTTy(FTy.getReturnType()) &&
 735            FTy.getParamType(0)->isPointerTy() &&
 736            FTy.getParamType(1)->isPointerTy() &&
 737            IsSizeTTy(FTy.getParamType(2));
 738
 739   case LibFunc_strncpy_chk:
 740   case LibFunc_stpncpy_chk:
 741     --NumParams;
 742     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 743       return false;
 744     LLVM_FALLTHROUGH;
 745   case LibFunc_strncpy:
 746   case LibFunc_stpncpy:
 747     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
 748             FTy.getParamType(0) == FTy.getParamType(1) &&
 749             FTy.getParamType(0) == PCharTy &&
 750             IsSizeTTy(FTy.getParamType(2)));
 751
 752   case LibFunc_strxfrm:
 753     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 754             FTy.getParamType(1)->isPointerTy());
 755
 756   case LibFunc_strcmp:
 757     return (NumParams == 2 && FTy.getReturnType()->isIntegerTy(32) &&
 758             FTy.getParamType(0)->isPointerTy() &&
 759             FTy.getParamType(0) == FTy.getParamType(1));
 760
 761   case LibFunc_strncmp:
 762     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
 763             FTy.getParamType(0)->isPointerTy() &&
 764             FTy.getParamType(0) == FTy.getParamType(1) &&
 765             IsSizeTTy(FTy.getParamType(2)));
 766
 767   case LibFunc_strspn:
 768   case LibFunc_strcspn:
 769     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
 770             FTy.getParamType(0) == FTy.getParamType(1) &&
 771             FTy.getReturnType()->isIntegerTy());
 772
 773   case LibFunc_strcoll:
 774   case LibFunc_strcasecmp:
 775   case LibFunc_strncasecmp:
 776     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 777             FTy.getParamType(1)->isPointerTy());
 778
 779   case LibFunc_strstr:
 780     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 781             FTy.getParamType(0)->isPointerTy() &&
 782             FTy.getParamType(1)->isPointerTy());
 783
 784   case LibFunc_strpbrk:
 785     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
 786             FTy.getReturnType() == FTy.getParamType(0) &&
 787             FTy.getParamType(0) == FTy.getParamType(1));
 788
 789   case LibFunc_strtok:
 790   case LibFunc_strtok_r:
 791     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
 792   case LibFunc_scanf:
 793   case LibFunc_setbuf:
 794   case LibFunc_setvbuf:
 795     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
 796   case LibFunc_strdup:
 797   case LibFunc_strndup:
 798     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
 799             FTy.getParamType(0)->isPointerTy());
 800   case LibFunc_sscanf:
 801   case LibFunc_stat:
 802   case LibFunc_statvfs:
 803   case LibFunc_siprintf:
 804   case LibFunc_small_sprintf:
 805   case LibFunc_sprintf:
 806     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 807             FTy.getParamType(1)->isPointerTy() &&
 808             FTy.getReturnType()->isIntegerTy(32));
 809
 810   case LibFunc_sprintf_chk:
 811     return NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
 812            FTy.getParamType(1)->isIntegerTy(32) &&
 813            IsSizeTTy(FTy.getParamType(2)) &&
 814            FTy.getParamType(3)->isPointerTy() &&
 815            FTy.getReturnType()->isIntegerTy(32);
 816
 817   case LibFunc_snprintf:
 818     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 819             FTy.getParamType(2)->isPointerTy() &&
 820             FTy.getReturnType()->isIntegerTy(32));
 821
 822   case LibFunc_snprintf_chk:
 823     return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
 824            IsSizeTTy(FTy.getParamType(1)) &&
 825            FTy.getParamType(2)->isIntegerTy(32) &&
 826            IsSizeTTy(FTy.getParamType(3)) &&
 827            FTy.getParamType(4)->isPointerTy() &&
 828            FTy.getReturnType()->isIntegerTy(32);
 829
 830   case LibFunc_setitimer:
 831     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
 832             FTy.getParamType(2)->isPointerTy());
 833   case LibFunc_system:
 834     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
 835   case LibFunc_malloc:
 836     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
 837   case LibFunc_memcmp:
 838     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
 839             FTy.getParamType(0)->isPointerTy() &&
 840             FTy.getParamType(1)->isPointerTy());
 841
 842   case LibFunc_memchr:
 843   case LibFunc_memrchr:
 844     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
 845             FTy.getReturnType() == FTy.getParamType(0) &&
 846             FTy.getParamType(1)->isIntegerTy(32) &&
 847             IsSizeTTy(FTy.getParamType(2)));
 848   case LibFunc_modf:
 849   case LibFunc_modff:
 850   case LibFunc_modfl:
 851     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
 852
 853   case LibFunc_memcpy_chk:
 854   case LibFunc_memmove_chk:
 855     --NumParams;
 856     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 857       return false;
 858     LLVM_FALLTHROUGH;
 859   case LibFunc_memcpy:
 860   case LibFunc_mempcpy:
 861   case LibFunc_memmove:
 862     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
 863             FTy.getParamType(0)->isPointerTy() &&
 864             FTy.getParamType(1)->isPointerTy() &&
 865             IsSizeTTy(FTy.getParamType(2)));
 866
 867   case LibFunc_memset_chk:
 868     --NumParams;
 869     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 870       return false;
 871     LLVM_FALLTHROUGH;
 872   case LibFunc_memset:
 873     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
 874             FTy.getParamType(0)->isPointerTy() &&
 875             FTy.getParamType(1)->isIntegerTy() &&
 876             IsSizeTTy(FTy.getParamType(2)));
 877
 878   case LibFunc_memccpy_chk:
 879       --NumParams;
 880     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 881       return false;
 882     LLVM_FALLTHROUGH;
 883   case LibFunc_memccpy:
 884     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
 885   case LibFunc_memalign:
 886     return (FTy.getReturnType()->isPointerTy());
 887   case LibFunc_realloc:
 888   case LibFunc_reallocf:
 889     return (NumParams == 2 && FTy.getReturnType() == PCharTy &&
 890             FTy.getParamType(0) == FTy.getReturnType() &&
 891             IsSizeTTy(FTy.getParamType(1)));
 892   case LibFunc_read:
 893     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
 894   case LibFunc_rewind:
 895   case LibFunc_rmdir:
 896   case LibFunc_remove:
 897   case LibFunc_realpath:
 898     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
 899   case LibFunc_rename:
 900     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 901             FTy.getParamType(1)->isPointerTy());
 902   case LibFunc_readlink:
 903     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 904             FTy.getParamType(1)->isPointerTy());
 905   case LibFunc_write:
 906     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
 907   case LibFunc_bcopy:
 908   case LibFunc_bcmp:
 909     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 910             FTy.getParamType(1)->isPointerTy());
 911   case LibFunc_bzero:
 912     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
 913   case LibFunc_calloc:
 914     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
 915
 916   case LibFunc_atof:
 917   case LibFunc_atoi:
 918   case LibFunc_atol:
 919   case LibFunc_atoll:
 920   case LibFunc_ferror:
 921   case LibFunc_getenv:
 922   case LibFunc_getpwnam:
 923   case LibFunc_iprintf:
 924   case LibFunc_small_printf:
 925   case LibFunc_pclose:
 926   case LibFunc_perror:
 927   case LibFunc_printf:
 928   case LibFunc_puts:
 929   case LibFunc_uname:
 930   case LibFunc_under_IO_getc:
 931   case LibFunc_unlink:
 932   case LibFunc_unsetenv:
 933     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
 934
 935   case LibFunc_access:
 936   case LibFunc_chmod:
 937   case LibFunc_chown:
 938   case LibFunc_clearerr:
 939   case LibFunc_closedir:
 940   case LibFunc_ctermid:
 941   case LibFunc_fclose:
 942   case LibFunc_feof:
 943   case LibFunc_fflush:
 944   case LibFunc_fgetc:
 945   case LibFunc_fgetc_unlocked:
 946   case LibFunc_fileno:
 947   case LibFunc_flockfile:
 948   case LibFunc_free:
 949   case LibFunc_fseek:
 950   case LibFunc_fseeko64:
 951   case LibFunc_fseeko:
 952   case LibFunc_fsetpos:
 953   case LibFunc_ftell:
 954   case LibFunc_ftello64:
 955   case LibFunc_ftello:
 956   case LibFunc_ftrylockfile:
 957   case LibFunc_funlockfile:
 958   case LibFunc_getc:
 959   case LibFunc_getc_unlocked:
 960   case LibFunc_getlogin_r:
 961   case LibFunc_mkdir:
 962   case LibFunc_mktime:
 963   case LibFunc_times:
 964     return (NumParams != 0 && FTy.getParamType(0)->isPointerTy());
 965
 966   case LibFunc_fopen:
 967     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 968             FTy.getParamType(0)->isPointerTy() &&
 969             FTy.getParamType(1)->isPointerTy());
 970   case LibFunc_fork:
 971     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy(32));
 972   case LibFunc_fdopen:
 973     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 974             FTy.getParamType(1)->isPointerTy());
 975   case LibFunc_fputc:
 976   case LibFunc_fputc_unlocked:
 977   case LibFunc_fstat:
 978   case LibFunc_frexp:
 979   case LibFunc_frexpf:
 980   case LibFunc_frexpl:
 981   case LibFunc_fstatvfs:
 982     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
 983   case LibFunc_fgets:
 984   case LibFunc_fgets_unlocked:
 985     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 986             FTy.getParamType(2)->isPointerTy());
 987   case LibFunc_fread:
 988   case LibFunc_fread_unlocked:
 989     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
 990             FTy.getParamType(3)->isPointerTy());
 991   case LibFunc_fwrite:
 992   case LibFunc_fwrite_unlocked:
 993     return (NumParams == 4 && FTy.getReturnType()->isIntegerTy() &&
 994             FTy.getParamType(0)->isPointerTy() &&
 995             FTy.getParamType(1)->isIntegerTy() &&
 996             FTy.getParamType(2)->isIntegerTy() &&
 997             FTy.getParamType(3)->isPointerTy());
 998   case LibFunc_fputs:
 999   case LibFunc_fputs_unlocked:
1000     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1001             FTy.getParamType(1)->isPointerTy());
1002   case LibFunc_fscanf:
1003   case LibFunc_fiprintf:
1004   case LibFunc_small_fprintf:
1005   case LibFunc_fprintf:
1006     return (NumParams >= 2 && FTy.getReturnType()->isIntegerTy() &&
1007             FTy.getParamType(0)->isPointerTy() &&
1008             FTy.getParamType(1)->isPointerTy());
1009   case LibFunc_fgetpos:
1010     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1011             FTy.getParamType(1)->isPointerTy());
1012   case LibFunc_getchar:
1013   case LibFunc_getchar_unlocked:
1014     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy());
1015   case LibFunc_gets:
1016     return (NumParams == 1 && FTy.getParamType(0) == PCharTy);
1017   case LibFunc_getitimer:
1018     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1019   case LibFunc_ungetc:
1020     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1021   case LibFunc_utime:
1022   case LibFunc_utimes:
1023     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1024             FTy.getParamType(1)->isPointerTy());
1025   case LibFunc_putc:
1026   case LibFunc_putc_unlocked:
1027     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1028   case LibFunc_pread:
1029   case LibFunc_pwrite:
1030     return (NumParams == 4 && FTy.getParamType(1)->isPointerTy());
1031   case LibFunc_popen:
1032     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1033             FTy.getParamType(0)->isPointerTy() &&
1034             FTy.getParamType(1)->isPointerTy());
1035   case LibFunc_vscanf:
1036     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1037   case LibFunc_vsscanf:
1038     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1039             FTy.getParamType(2)->isPointerTy());
1040   case LibFunc_vfscanf:
1041     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1042             FTy.getParamType(2)->isPointerTy());
1043   case LibFunc_valloc:
1044     return (FTy.getReturnType()->isPointerTy());
1045   case LibFunc_vprintf:
1046     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1047   case LibFunc_vfprintf:
1048   case LibFunc_vsprintf:
1049     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1050             FTy.getParamType(1)->isPointerTy());
1051   case LibFunc_vsprintf_chk:
1052     return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
1053            FTy.getParamType(1)->isIntegerTy(32) &&
1054            IsSizeTTy(FTy.getParamType(2)) && FTy.getParamType(3)->isPointerTy();
1055   case LibFunc_vsnprintf:
1056     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1057             FTy.getParamType(2)->isPointerTy());
1058   case LibFunc_vsnprintf_chk:
1059     return NumParams == 6 && FTy.getParamType(0)->isPointerTy() &&
1060            FTy.getParamType(2)->isIntegerTy(32) &&
1061            IsSizeTTy(FTy.getParamType(3)) && FTy.getParamType(4)->isPointerTy();
1062   case LibFunc_open:
1063     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1064   case LibFunc_opendir:
1065     return (NumParams == 1 && FTy.getReturnType()->isPointerTy() &&
1066             FTy.getParamType(0)->isPointerTy());
1067   case LibFunc_tmpfile:
1068     return (FTy.getReturnType()->isPointerTy());
1069   case LibFunc_htonl:
1070   case LibFunc_ntohl:
1071     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1072             FTy.getReturnType() == FTy.getParamType(0));
1073   case LibFunc_htons:
1074   case LibFunc_ntohs:
1075     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(16) &&
1076             FTy.getReturnType() == FTy.getParamType(0));
1077   case LibFunc_lstat:
1078     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1079             FTy.getParamType(1)->isPointerTy());
1080   case LibFunc_lchown:
1081     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1082   case LibFunc_qsort:
1083     return (NumParams == 4 && FTy.getParamType(3)->isPointerTy());
1084   case LibFunc_dunder_strdup:
1085   case LibFunc_dunder_strndup:
1086     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
1087             FTy.getParamType(0)->isPointerTy());
1088   case LibFunc_dunder_strtok_r:
1089     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1090   case LibFunc_under_IO_putc:
1091     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1092   case LibFunc_dunder_isoc99_scanf:
1093     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1094   case LibFunc_stat64:
1095   case LibFunc_lstat64:
1096   case LibFunc_statvfs64:
1097     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1098             FTy.getParamType(1)->isPointerTy());
1099   case LibFunc_dunder_isoc99_sscanf:
1100     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1101             FTy.getParamType(1)->isPointerTy());
1102   case LibFunc_fopen64:
1103     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1104             FTy.getParamType(0)->isPointerTy() &&
1105             FTy.getParamType(1)->isPointerTy());
1106   case LibFunc_tmpfile64:
1107     return (FTy.getReturnType()->isPointerTy());
1108   case LibFunc_fstat64:
1109   case LibFunc_fstatvfs64:
1110     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1111   case LibFunc_open64:
1112     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1113   case LibFunc_gettimeofday:
1114     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1115             FTy.getParamType(1)->isPointerTy());
1116
1117   // new(unsigned int);
1118   case LibFunc_Znwj:
1119   // new(unsigned long);
1120   case LibFunc_Znwm:
1121   // new[](unsigned int);
1122   case LibFunc_Znaj:
1123   // new[](unsigned long);
1124   case LibFunc_Znam:
1125   // new(unsigned int);
1126   case LibFunc_msvc_new_int:
1127   // new(unsigned long long);
1128   case LibFunc_msvc_new_longlong:
1129   // new[](unsigned int);
1130   case LibFunc_msvc_new_array_int:
1131   // new[](unsigned long long);
1132   case LibFunc_msvc_new_array_longlong:
1133     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
1134
1135   // new(unsigned int, nothrow);
1136   case LibFunc_ZnwjRKSt9nothrow_t:
1137   // new(unsigned long, nothrow);
1138   case LibFunc_ZnwmRKSt9nothrow_t:
1139   // new[](unsigned int, nothrow);
1140   case LibFunc_ZnajRKSt9nothrow_t:
1141   // new[](unsigned long, nothrow);
1142   case LibFunc_ZnamRKSt9nothrow_t:
1143   // new(unsigned int, nothrow);
1144   case LibFunc_msvc_new_int_nothrow:
1145   // new(unsigned long long, nothrow);
1146   case LibFunc_msvc_new_longlong_nothrow:
1147   // new[](unsigned int, nothrow);
1148   case LibFunc_msvc_new_array_int_nothrow:
1149   // new[](unsigned long long, nothrow);
1150   case LibFunc_msvc_new_array_longlong_nothrow:
1151   // new(unsigned int, align_val_t)
1152   case LibFunc_ZnwjSt11align_val_t:
1153   // new(unsigned long, align_val_t)
1154   case LibFunc_ZnwmSt11align_val_t:
1155   // new[](unsigned int, align_val_t)
1156   case LibFunc_ZnajSt11align_val_t:
1157   // new[](unsigned long, align_val_t)
1158   case LibFunc_ZnamSt11align_val_t:
1159     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
1160
1161   // new(unsigned int, align_val_t, nothrow)
1162   case LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t:
1163   // new(unsigned long, align_val_t, nothrow)
1164   case LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t:
1165   // new[](unsigned int, align_val_t, nothrow)
1166   case LibFunc_ZnajSt11align_val_tRKSt9nothrow_t:
1167   // new[](unsigned long, align_val_t, nothrow)
1168   case LibFunc_ZnamSt11align_val_tRKSt9nothrow_t:
1169     return (NumParams == 3 && FTy.getReturnType()->isPointerTy());
1170
1171   // void operator delete[](void*);
1172   case LibFunc_ZdaPv:
1173   // void operator delete(void*);
1174   case LibFunc_ZdlPv:
1175   // void operator delete[](void*);
1176   case LibFunc_msvc_delete_array_ptr32:
1177   // void operator delete[](void*);
1178   case LibFunc_msvc_delete_array_ptr64:
1179   // void operator delete(void*);
1180   case LibFunc_msvc_delete_ptr32:
1181   // void operator delete(void*);
1182   case LibFunc_msvc_delete_ptr64:
1183     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1184
1185   // void operator delete[](void*, nothrow);
1186   case LibFunc_ZdaPvRKSt9nothrow_t:
1187   // void operator delete[](void*, unsigned int);
1188   case LibFunc_ZdaPvj:
1189   // void operator delete[](void*, unsigned long);
1190   case LibFunc_ZdaPvm:
1191   // void operator delete(void*, nothrow);
1192   case LibFunc_ZdlPvRKSt9nothrow_t:
1193   // void operator delete(void*, unsigned int);
1194   case LibFunc_ZdlPvj:
1195   // void operator delete(void*, unsigned long);
1196   case LibFunc_ZdlPvm:
1197   // void operator delete(void*, align_val_t)
1198   case LibFunc_ZdlPvSt11align_val_t:
1199   // void operator delete[](void*, align_val_t)
1200   case LibFunc_ZdaPvSt11align_val_t:
1201   // void operator delete[](void*, unsigned int);
1202   case LibFunc_msvc_delete_array_ptr32_int:
1203   // void operator delete[](void*, nothrow);
1204   case LibFunc_msvc_delete_array_ptr32_nothrow:
1205   // void operator delete[](void*, unsigned long long);
1206   case LibFunc_msvc_delete_array_ptr64_longlong:
1207   // void operator delete[](void*, nothrow);
1208   case LibFunc_msvc_delete_array_ptr64_nothrow:
1209   // void operator delete(void*, unsigned int);
1210   case LibFunc_msvc_delete_ptr32_int:
1211   // void operator delete(void*, nothrow);
1212   case LibFunc_msvc_delete_ptr32_nothrow:
1213   // void operator delete(void*, unsigned long long);
1214   case LibFunc_msvc_delete_ptr64_longlong:
1215   // void operator delete(void*, nothrow);
1216   case LibFunc_msvc_delete_ptr64_nothrow:
1217     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1218
1219   // void operator delete(void*, align_val_t, nothrow)
1220   case LibFunc_ZdlPvSt11align_val_tRKSt9nothrow_t:
1221   // void operator delete[](void*, align_val_t, nothrow)
1222   case LibFunc_ZdaPvSt11align_val_tRKSt9nothrow_t:
1223     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1224
1225   case LibFunc_memset_pattern16:
1226     return (!FTy.isVarArg() && NumParams == 3 &&
1227             FTy.getParamType(0)->isPointerTy() &&
1228             FTy.getParamType(1)->isPointerTy() &&
1229             FTy.getParamType(2)->isIntegerTy());
1230
1231   case LibFunc_cxa_guard_abort:
1232   case LibFunc_cxa_guard_acquire:
1233   case LibFunc_cxa_guard_release:
1234   case LibFunc_nvvm_reflect:
1235     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1236
1237   case LibFunc_sincospi_stret:
1238   case LibFunc_sincospif_stret:
1239     return (NumParams == 1 && FTy.getParamType(0)->isFloatingPointTy());
1240
1241   case LibFunc_acos:
1242   case LibFunc_acos_finite:
1243   case LibFunc_acosf:
1244   case LibFunc_acosf_finite:
1245   case LibFunc_acosh:
1246   case LibFunc_acosh_finite:
1247   case LibFunc_acoshf:
1248   case LibFunc_acoshf_finite:
1249   case LibFunc_acoshl:
1250   case LibFunc_acoshl_finite:
1251   case LibFunc_acosl:
1252   case LibFunc_acosl_finite:
1253   case LibFunc_asin:
1254   case LibFunc_asin_finite:
1255   case LibFunc_asinf:
1256   case LibFunc_asinf_finite:
1257   case LibFunc_asinh:
1258   case LibFunc_asinhf:
1259   case LibFunc_asinhl:
1260   case LibFunc_asinl:
1261   case LibFunc_asinl_finite:
1262   case LibFunc_atan:
1263   case LibFunc_atanf:
1264   case LibFunc_atanh:
1265   case LibFunc_atanh_finite:
1266   case LibFunc_atanhf:
1267   case LibFunc_atanhf_finite:
1268   case LibFunc_atanhl:
1269   case LibFunc_atanhl_finite:
1270   case LibFunc_atanl:
1271   case LibFunc_cbrt:
1272   case LibFunc_cbrtf:
1273   case LibFunc_cbrtl:
1274   case LibFunc_ceil:
1275   case LibFunc_ceilf:
1276   case LibFunc_ceill:
1277   case LibFunc_cos:
1278   case LibFunc_cosf:
1279   case LibFunc_cosh:
1280   case LibFunc_cosh_finite:
1281   case LibFunc_coshf:
1282   case LibFunc_coshf_finite:
1283   case LibFunc_coshl:
1284   case LibFunc_coshl_finite:
1285   case LibFunc_cosl:
1286   case LibFunc_exp10:
1287   case LibFunc_exp10_finite:
1288   case LibFunc_exp10f:
1289   case LibFunc_exp10f_finite:
1290   case LibFunc_exp10l:
1291   case LibFunc_exp10l_finite:
1292   case LibFunc_exp2:
1293   case LibFunc_exp2_finite:
1294   case LibFunc_exp2f:
1295   case LibFunc_exp2f_finite:
1296   case LibFunc_exp2l:
1297   case LibFunc_exp2l_finite:
1298   case LibFunc_exp:
1299   case LibFunc_exp_finite:
1300   case LibFunc_expf:
1301   case LibFunc_expf_finite:
1302   case LibFunc_expl:
1303   case LibFunc_expl_finite:
1304   case LibFunc_expm1:
1305   case LibFunc_expm1f:
1306   case LibFunc_expm1l:
1307   case LibFunc_fabs:
1308   case LibFunc_fabsf:
1309   case LibFunc_fabsl:
1310   case LibFunc_floor:
1311   case LibFunc_floorf:
1312   case LibFunc_floorl:
1313   case LibFunc_log10:
1314   case LibFunc_log10_finite:
1315   case LibFunc_log10f:
1316   case LibFunc_log10f_finite:
1317   case LibFunc_log10l:
1318   case LibFunc_log10l_finite:
1319   case LibFunc_log1p:
1320   case LibFunc_log1pf:
1321   case LibFunc_log1pl:
1322   case LibFunc_log2:
1323   case LibFunc_log2_finite:
1324   case LibFunc_log2f:
1325   case LibFunc_log2f_finite:
1326   case LibFunc_log2l:
1327   case LibFunc_log2l_finite:
1328   case LibFunc_log:
1329   case LibFunc_log_finite:
1330   case LibFunc_logb:
1331   case LibFunc_logbf:
1332   case LibFunc_logbl:
1333   case LibFunc_logf:
1334   case LibFunc_logf_finite:
1335   case LibFunc_logl:
1336   case LibFunc_logl_finite:
1337   case LibFunc_nearbyint:
1338   case LibFunc_nearbyintf:
1339   case LibFunc_nearbyintl:
1340   case LibFunc_rint:
1341   case LibFunc_rintf:
1342   case LibFunc_rintl:
1343   case LibFunc_round:
1344   case LibFunc_roundf:
1345   case LibFunc_roundl:
1346   case LibFunc_sin:
1347   case LibFunc_sinf:
1348   case LibFunc_sinh:
1349   case LibFunc_sinh_finite:
1350   case LibFunc_sinhf:
1351   case LibFunc_sinhf_finite:
1352   case LibFunc_sinhl:
1353   case LibFunc_sinhl_finite:
1354   case LibFunc_sinl:
1355   case LibFunc_sqrt:
1356   case LibFunc_sqrt_finite:
1357   case LibFunc_sqrtf:
1358   case LibFunc_sqrtf_finite:
1359   case LibFunc_sqrtl:
1360   case LibFunc_sqrtl_finite:
1361   case LibFunc_tan:
1362   case LibFunc_tanf:
1363   case LibFunc_tanh:
1364   case LibFunc_tanhf:
1365   case LibFunc_tanhl:
1366   case LibFunc_tanl:
1367   case LibFunc_trunc:
1368   case LibFunc_truncf:
1369   case LibFunc_truncl:
1370     return (NumParams == 1 && FTy.getReturnType()->isFloatingPointTy() &&
1371             FTy.getReturnType() == FTy.getParamType(0));
1372
1373   case LibFunc_atan2:
1374   case LibFunc_atan2_finite:
1375   case LibFunc_atan2f:
1376   case LibFunc_atan2f_finite:
1377   case LibFunc_atan2l:
1378   case LibFunc_atan2l_finite:
1379   case LibFunc_fmin:
1380   case LibFunc_fminf:
1381   case LibFunc_fminl:
1382   case LibFunc_fmax:
1383   case LibFunc_fmaxf:
1384   case LibFunc_fmaxl:
1385   case LibFunc_fmod:
1386   case LibFunc_fmodf:
1387   case LibFunc_fmodl:
1388   case LibFunc_copysign:
1389   case LibFunc_copysignf:
1390   case LibFunc_copysignl:
1391   case LibFunc_pow:
1392   case LibFunc_pow_finite:
1393   case LibFunc_powf:
1394   case LibFunc_powf_finite:
1395   case LibFunc_powl:
1396   case LibFunc_powl_finite:
1397     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1398             FTy.getReturnType() == FTy.getParamType(0) &&
1399             FTy.getReturnType() == FTy.getParamType(1));
1400
1401   case LibFunc_ldexp:
1402   case LibFunc_ldexpf:
1403   case LibFunc_ldexpl:
1404     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1405             FTy.getReturnType() == FTy.getParamType(0) &&
1406             FTy.getParamType(1)->isIntegerTy(32));
1407
1408   case LibFunc_ffs:
1409   case LibFunc_ffsl:
1410   case LibFunc_ffsll:
1411   case LibFunc_fls:
1412   case LibFunc_flsl:
1413   case LibFunc_flsll:
1414     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1415             FTy.getParamType(0)->isIntegerTy());
1416
1417   case LibFunc_isdigit:
1418   case LibFunc_isascii:
1419   case LibFunc_toascii:
1420   case LibFunc_putchar:
1421   case LibFunc_putchar_unlocked:
1422     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1423             FTy.getReturnType() == FTy.getParamType(0));
1424
1425   case LibFunc_abs:
1426   case LibFunc_labs:
1427   case LibFunc_llabs:
1428     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy() &&
1429             FTy.getReturnType() == FTy.getParamType(0));
1430
1431   case LibFunc_cxa_atexit:
1432     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy() &&
1433             FTy.getParamType(0)->isPointerTy() &&
1434             FTy.getParamType(1)->isPointerTy() &&
1435             FTy.getParamType(2)->isPointerTy());
1436
1437   case LibFunc_sinpi:
1438   case LibFunc_cospi:
1439     return (NumParams == 1 && FTy.getReturnType()->isDoubleTy() &&
1440             FTy.getReturnType() == FTy.getParamType(0));
1441
1442   case LibFunc_sinpif:
1443   case LibFunc_cospif:
1444     return (NumParams == 1 && FTy.getReturnType()->isFloatTy() &&
1445             FTy.getReturnType() == FTy.getParamType(0));
1446
1447   case LibFunc_strnlen:
1448     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(1) &&
1449             FTy.getParamType(0) == PCharTy &&
1450             FTy.getParamType(1) == SizeTTy);
1451
1452   case LibFunc_posix_memalign:
1453     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1454             FTy.getParamType(0)->isPointerTy() &&
1455             FTy.getParamType(1) == SizeTTy && FTy.getParamType(2) == SizeTTy);
1456
1457   case LibFunc_wcslen:
1458     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
1459             FTy.getReturnType()->isIntegerTy());
1460
1461   case LibFunc_cabs:
1462   case LibFunc_cabsf:
1463   case LibFunc_cabsl: {
1464     Type* RetTy = FTy.getReturnType();
1465     if (!RetTy->isFloatingPointTy())
1466       return false;
1467
1468     // NOTE: These prototypes are target specific and currently support
1469     // "complex" passed as an array or discrete real & imaginary parameters.
1470     // Add other calling conventions to enable libcall optimizations.
1471     if (NumParams == 1)
1472       return (FTy.getParamType(0)->isArrayTy() &&
1473               FTy.getParamType(0)->getArrayNumElements() == 2 &&
1474               FTy.getParamType(0)->getArrayElementType() == RetTy);
1475     else if (NumParams == 2)
1476       return (FTy.getParamType(0) == RetTy && FTy.getParamType(1) == RetTy);
1477     else
1478       return false;
1479   }
1480   case LibFunc::NumLibFuncs:
1481     break;
1482   }
1483
1484   llvm_unreachable("Invalid libfunc");
1485 }
1486
1487 bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl,
1488                                        LibFunc &F) const {
1489   // Intrinsics don't overlap w/libcalls; if our module has a large number of
1490   // intrinsics, this ends up being an interesting compile time win since we
1491   // avoid string normalization and comparison.
1492   if (FDecl.isIntrinsic()) return false;
1493
1494   const DataLayout *DL =
1495       FDecl.getParent() ? &FDecl.getParent()->getDataLayout() : nullptr;
1496   return getLibFunc(FDecl.getName(), F) &&
1497          isValidProtoForLibFunc(*FDecl.getFunctionType(), F, DL);
1498 }
1499
1500 void TargetLibraryInfoImpl::disableAllFunctions() {
1501   memset(AvailableArray, 0, sizeof(AvailableArray));
1502 }
1503
1504 static bool compareByScalarFnName(const VecDesc &LHS, const VecDesc &RHS) {
1505   return LHS.ScalarFnName < RHS.ScalarFnName;
1506 }
1507
1508 static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) {
1509   return LHS.VectorFnName < RHS.VectorFnName;
1510 }
1511
1512 static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) {
1513   return LHS.ScalarFnName < S;
1514 }
1515
1516 static bool compareWithVectorFnName(const VecDesc &LHS, StringRef S) {
1517   return LHS.VectorFnName < S;
1518 }
1519
1520 void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) {
1521   VectorDescs.insert(VectorDescs.end(), Fns.begin(), Fns.end());
1522   llvm::sort(VectorDescs, compareByScalarFnName);
1523
1524   ScalarDescs.insert(ScalarDescs.end(), Fns.begin(), Fns.end());
1525   llvm::sort(ScalarDescs, compareByVectorFnName);
1526 }
1527
1528 void TargetLibraryInfoImpl::addVectorizableFunctionsFromVecLib(
1529     enum VectorLibrary VecLib) {
1530   switch (VecLib) {
1531   case Accelerate: {
1532     const VecDesc VecFuncs[] = {
1533     #define TLI_DEFINE_ACCELERATE_VECFUNCS
1534     #include "llvm/Analysis/VecFuncs.def"
1535     };
1536     addVectorizableFunctions(VecFuncs);
1537     break;
1538   }
1539   case MASSV: {
1540     const VecDesc VecFuncs[] = {
1541     #define TLI_DEFINE_MASSV_VECFUNCS
1542     #include "llvm/Analysis/VecFuncs.def"
1543     };
1544     addVectorizableFunctions(VecFuncs);
1545     break;
1546   }
1547   case SVML: {
1548     const VecDesc VecFuncs[] = {
1549     #define TLI_DEFINE_SVML_VECFUNCS
1550     #include "llvm/Analysis/VecFuncs.def"
1551     };
1552     addVectorizableFunctions(VecFuncs);
1553     break;
1554   }
1555   case NoLibrary:
1556     break;
1557   }
1558 }
1559
1560 bool TargetLibraryInfoImpl::isFunctionVectorizable(StringRef funcName) const {
1561   funcName = sanitizeFunctionName(funcName);
1562   if (funcName.empty())
1563     return false;
1564
1565   std::vector<VecDesc>::const_iterator I =
1566       llvm::lower_bound(VectorDescs, funcName, compareWithScalarFnName);
1567   return I != VectorDescs.end() && StringRef(I->ScalarFnName) == funcName;
1568 }
1569
1570 StringRef TargetLibraryInfoImpl::getVectorizedFunction(StringRef F,
1571                                                        unsigned VF) const {
1572   F = sanitizeFunctionName(F);
1573   if (F.empty())
1574     return F;
1575   std::vector<VecDesc>::const_iterator I =
1576       llvm::lower_bound(VectorDescs, F, compareWithScalarFnName);
1577   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == F) {
1578     if (I->VectorizationFactor == VF)
1579       return I->VectorFnName;
1580     ++I;
1581   }
1582   return StringRef();
1583 }
1584
1585 StringRef TargetLibraryInfoImpl::getScalarizedFunction(StringRef F,
1586                                                        unsigned &VF) const {
1587   F = sanitizeFunctionName(F);
1588   if (F.empty())
1589     return F;
1590
1591   std::vector<VecDesc>::const_iterator I =
1592       llvm::lower_bound(ScalarDescs, F, compareWithVectorFnName);
1593   if (I == VectorDescs.end() || StringRef(I->VectorFnName) != F)
1594     return StringRef();
1595   VF = I->VectorizationFactor;
1596   return I->ScalarFnName;
1597 }
1598
1599 TargetLibraryInfo TargetLibraryAnalysis::run(Module &M,
1600                                              ModuleAnalysisManager &) {
1601   if (PresetInfoImpl)
1602     return TargetLibraryInfo(*PresetInfoImpl);
1603
1604   return TargetLibraryInfo(lookupInfoImpl(Triple(M.getTargetTriple())));
1605 }
1606
1607 TargetLibraryInfo TargetLibraryAnalysis::run(Function &F,
1608                                              FunctionAnalysisManager &) {
1609   if (PresetInfoImpl)
1610     return TargetLibraryInfo(*PresetInfoImpl);
1611
1612   return TargetLibraryInfo(
1613       lookupInfoImpl(Triple(F.getParent()->getTargetTriple())));
1614 }
1615
1616 TargetLibraryInfoImpl &TargetLibraryAnalysis::lookupInfoImpl(const Triple &T) {
1617   std::unique_ptr<TargetLibraryInfoImpl> &Impl =
1618       Impls[T.normalize()];
1619   if (!Impl)
1620     Impl.reset(new TargetLibraryInfoImpl(T));
1621
1622   return *Impl;
1623 }
1624
1625 unsigned TargetLibraryInfoImpl::getWCharSize(const Module &M) const {
1626   if (auto *ShortWChar = cast_or_null<ConstantAsMetadata>(
1627       M.getModuleFlag("wchar_size")))
1628     return cast<ConstantInt>(ShortWChar->getValue())->getZExtValue();
1629   return 0;
1630 }
1631
1632 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass()
1633     : ImmutablePass(ID), TLIImpl(), TLI(TLIImpl) {
1634   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1635 }
1636
1637 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T)
1638     : ImmutablePass(ID), TLIImpl(T), TLI(TLIImpl) {
1639   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1640 }
1641
1642 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(
1643     const TargetLibraryInfoImpl &TLIImpl)
1644     : ImmutablePass(ID), TLIImpl(TLIImpl), TLI(this->TLIImpl) {
1645   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1646 }
1647
1648 AnalysisKey TargetLibraryAnalysis::Key;
1649
1650 // Register the basic pass.
1651 INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo",
1652                 "Target Library Information", false, true)
1653 char TargetLibraryInfoWrapperPass::ID = 0;
1654
1655 void TargetLibraryInfoWrapperPass::anchor() {}