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 StringRef const TargetLibraryInfoImpl::StandardNames[LibFunc::NumLibFuncs] = {
  32 #define TLI_DEFINE_STRING
  33 #include "llvm/Analysis/TargetLibraryInfo.def"
  34 };
  35
  36 static bool hasSinCosPiStret(const Triple &T) {
  37   // Only Darwin variants have _stret versions of combined trig functions.
  38   if (!T.isOSDarwin())
  39     return false;
  40
  41   // The ABI is rather complicated on x86, so don't do anything special there.
  42   if (T.getArch() == Triple::x86)
  43     return false;
  44
  45   if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
  46     return false;
  47
  48   if (T.isiOS() && T.isOSVersionLT(7, 0))
  49     return false;
  50
  51   return true;
  52 }
  53
  54 static bool hasBcmp(const Triple &TT) {
  55   // Posix removed support from bcmp() in 2001, but the glibc and several
  56   // implementations of the libc still have it.
  57   if (TT.isOSLinux())
  58     return TT.isGNUEnvironment() || TT.isMusl();
  59   // Both NetBSD and OpenBSD are planning to remove the function. Windows does
  60   // not have it.
  61   return TT.isOSFreeBSD() || TT.isOSSolaris();
  62 }
  63
  64 /// Initialize the set of available library functions based on the specified
  65 /// target triple. This should be carefully written so that a missing target
  66 /// triple gets a sane set of defaults.
  67 static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
  68                        ArrayRef<StringRef> StandardNames) {
  69   // Verify that the StandardNames array is in alphabetical order.
  70   assert(std::is_sorted(StandardNames.begin(), StandardNames.end(),
  71                         [](StringRef LHS, StringRef RHS) {
  72                           return LHS < RHS;
  73                         }) &&
  74          "TargetLibraryInfoImpl function names must be sorted");
  75
  76   // Set IO unlocked variants as unavailable
  77   // Set them as available per system below
  78   TLI.setUnavailable(LibFunc_getchar_unlocked);
  79   TLI.setUnavailable(LibFunc_putc_unlocked);
  80   TLI.setUnavailable(LibFunc_putchar_unlocked);
  81   TLI.setUnavailable(LibFunc_fputc_unlocked);
  82   TLI.setUnavailable(LibFunc_fgetc_unlocked);
  83   TLI.setUnavailable(LibFunc_fread_unlocked);
  84   TLI.setUnavailable(LibFunc_fwrite_unlocked);
  85   TLI.setUnavailable(LibFunc_fputs_unlocked);
  86   TLI.setUnavailable(LibFunc_fgets_unlocked);
  87
  88   bool ShouldExtI32Param = false, ShouldExtI32Return = false,
  89        ShouldSignExtI32Param = false;
  90   // PowerPC64, Sparc64, SystemZ need signext/zeroext on i32 parameters and
  91   // returns corresponding to C-level ints and unsigned ints.
  92   if (T.isPPC64() || T.getArch() == Triple::sparcv9 ||
  93       T.getArch() == Triple::systemz) {
  94     ShouldExtI32Param = true;
  95     ShouldExtI32Return = true;
  96   }
  97   // Mips, on the other hand, needs signext on i32 parameters corresponding
  98   // to both signed and unsigned ints.
  99   if (T.isMIPS()) {
 100     ShouldSignExtI32Param = true;
 101   }
 102   TLI.setShouldExtI32Param(ShouldExtI32Param);
 103   TLI.setShouldExtI32Return(ShouldExtI32Return);
 104   TLI.setShouldSignExtI32Param(ShouldSignExtI32Param);
 105
 106   if (T.getArch() == Triple::r600 ||
 107       T.getArch() == Triple::amdgcn) {
 108     TLI.setUnavailable(LibFunc_ldexp);
 109     TLI.setUnavailable(LibFunc_ldexpf);
 110     TLI.setUnavailable(LibFunc_ldexpl);
 111     TLI.setUnavailable(LibFunc_exp10);
 112     TLI.setUnavailable(LibFunc_exp10f);
 113     TLI.setUnavailable(LibFunc_exp10l);
 114     TLI.setUnavailable(LibFunc_log10);
 115     TLI.setUnavailable(LibFunc_log10f);
 116     TLI.setUnavailable(LibFunc_log10l);
 117     TLI.setUnavailable(LibFunc_printf);
 118   }
 119
 120   // There are no library implementations of memcpy and memset for AMD gpus and
 121   // these can be difficult to lower in the backend.
 122   if (T.getArch() == Triple::r600 ||
 123       T.getArch() == Triple::amdgcn) {
 124     TLI.setUnavailable(LibFunc_memcpy);
 125     TLI.setUnavailable(LibFunc_memset);
 126     TLI.setUnavailable(LibFunc_memset_pattern16);
 127     return;
 128   }
 129
 130   // memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
 131   // All versions of watchOS support it.
 132   if (T.isMacOSX()) {
 133     // available IO unlocked variants on Mac OS X
 134     TLI.setAvailable(LibFunc_getc_unlocked);
 135     TLI.setAvailable(LibFunc_getchar_unlocked);
 136     TLI.setAvailable(LibFunc_putc_unlocked);
 137     TLI.setAvailable(LibFunc_putchar_unlocked);
 138
 139     if (T.isMacOSXVersionLT(10, 5))
 140       TLI.setUnavailable(LibFunc_memset_pattern16);
 141   } else if (T.isiOS()) {
 142     if (T.isOSVersionLT(3, 0))
 143       TLI.setUnavailable(LibFunc_memset_pattern16);
 144   } else if (!T.isWatchOS()) {
 145     TLI.setUnavailable(LibFunc_memset_pattern16);
 146   }
 147
 148   if (!hasSinCosPiStret(T)) {
 149     TLI.setUnavailable(LibFunc_sinpi);
 150     TLI.setUnavailable(LibFunc_sinpif);
 151     TLI.setUnavailable(LibFunc_cospi);
 152     TLI.setUnavailable(LibFunc_cospif);
 153     TLI.setUnavailable(LibFunc_sincospi_stret);
 154     TLI.setUnavailable(LibFunc_sincospif_stret);
 155   }
 156
 157   if (!hasBcmp(T))
 158     TLI.setUnavailable(LibFunc_bcmp);
 159
 160   if (T.isMacOSX() && T.getArch() == Triple::x86 &&
 161       !T.isMacOSXVersionLT(10, 7)) {
 162     // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
 163     // we don't care about) have two versions; on recent OSX, the one we want
 164     // has a $UNIX2003 suffix. The two implementations are identical except
 165     // for the return value in some edge cases.  However, we don't want to
 166     // generate code that depends on the old symbols.
 167     TLI.setAvailableWithName(LibFunc_fwrite, "fwrite$UNIX2003");
 168     TLI.setAvailableWithName(LibFunc_fputs, "fputs$UNIX2003");
 169   }
 170
 171   // iprintf and friends are only available on XCore, TCE, and Emscripten.
 172   if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce &&
 173       T.getOS() != Triple::Emscripten) {
 174     TLI.setUnavailable(LibFunc_iprintf);
 175     TLI.setUnavailable(LibFunc_siprintf);
 176     TLI.setUnavailable(LibFunc_fiprintf);
 177   }
 178
 179   // __small_printf and friends are only available on Emscripten.
 180   if (T.getOS() != Triple::Emscripten) {
 181     TLI.setUnavailable(LibFunc_small_printf);
 182     TLI.setUnavailable(LibFunc_small_sprintf);
 183     TLI.setUnavailable(LibFunc_small_fprintf);
 184   }
 185
 186   if (T.isOSWindows() && !T.isOSCygMing()) {
 187     // XXX: The earliest documentation available at the moment is for VS2015/VC19:
 188     // https://docs.microsoft.com/en-us/cpp/c-runtime-library/floating-point-support?view=vs-2015
 189     // XXX: In order to use an MSVCRT older than VC19,
 190     // the specific library version must be explicit in the target triple,
 191     // e.g., x86_64-pc-windows-msvc18.
 192     bool hasPartialC99 = true;
 193     if (T.isKnownWindowsMSVCEnvironment()) {
 194       unsigned Major, Minor, Micro;
 195       T.getEnvironmentVersion(Major, Minor, Micro);
 196       hasPartialC99 = (Major == 0 || Major >= 19);
 197     }
 198
 199     // Latest targets support C89 math functions, in part.
 200     bool isARM = (T.getArch() == Triple::aarch64 ||
 201                   T.getArch() == Triple::arm);
 202     bool hasPartialFloat = (isARM ||
 203                             T.getArch() == Triple::x86_64);
 204
 205     // Win32 does not support float C89 math functions, in general.
 206     if (!hasPartialFloat) {
 207       TLI.setUnavailable(LibFunc_acosf);
 208       TLI.setUnavailable(LibFunc_asinf);
 209       TLI.setUnavailable(LibFunc_atan2f);
 210       TLI.setUnavailable(LibFunc_atanf);
 211       TLI.setUnavailable(LibFunc_ceilf);
 212       TLI.setUnavailable(LibFunc_cosf);
 213       TLI.setUnavailable(LibFunc_coshf);
 214       TLI.setUnavailable(LibFunc_expf);
 215       TLI.setUnavailable(LibFunc_floorf);
 216       TLI.setUnavailable(LibFunc_fmodf);
 217       TLI.setUnavailable(LibFunc_log10f);
 218       TLI.setUnavailable(LibFunc_logf);
 219       TLI.setUnavailable(LibFunc_modff);
 220       TLI.setUnavailable(LibFunc_powf);
 221       TLI.setUnavailable(LibFunc_sinf);
 222       TLI.setUnavailable(LibFunc_sinhf);
 223       TLI.setUnavailable(LibFunc_sqrtf);
 224       TLI.setUnavailable(LibFunc_tanf);
 225       TLI.setUnavailable(LibFunc_tanhf);
 226     }
 227     if (!isARM)
 228       TLI.setUnavailable(LibFunc_fabsf);
 229     TLI.setUnavailable(LibFunc_frexpf);
 230     TLI.setUnavailable(LibFunc_ldexpf);
 231
 232     // Win32 does not support long double C89 math functions.
 233     TLI.setUnavailable(LibFunc_acosl);
 234     TLI.setUnavailable(LibFunc_asinl);
 235     TLI.setUnavailable(LibFunc_atan2l);
 236     TLI.setUnavailable(LibFunc_atanl);
 237     TLI.setUnavailable(LibFunc_ceill);
 238     TLI.setUnavailable(LibFunc_cosl);
 239     TLI.setUnavailable(LibFunc_coshl);
 240     TLI.setUnavailable(LibFunc_expl);
 241     TLI.setUnavailable(LibFunc_fabsl);
 242     TLI.setUnavailable(LibFunc_floorl);
 243     TLI.setUnavailable(LibFunc_fmodl);
 244     TLI.setUnavailable(LibFunc_frexpl);
 245     TLI.setUnavailable(LibFunc_ldexpl);
 246     TLI.setUnavailable(LibFunc_log10l);
 247     TLI.setUnavailable(LibFunc_logl);
 248     TLI.setUnavailable(LibFunc_modfl);
 249     TLI.setUnavailable(LibFunc_powl);
 250     TLI.setUnavailable(LibFunc_sinl);
 251     TLI.setUnavailable(LibFunc_sinhl);
 252     TLI.setUnavailable(LibFunc_sqrtl);
 253     TLI.setUnavailable(LibFunc_tanl);
 254     TLI.setUnavailable(LibFunc_tanhl);
 255
 256     // Win32 does not fully support C99 math functions.
 257     if (!hasPartialC99) {
 258       TLI.setUnavailable(LibFunc_acosh);
 259       TLI.setUnavailable(LibFunc_acoshf);
 260       TLI.setUnavailable(LibFunc_asinh);
 261       TLI.setUnavailable(LibFunc_asinhf);
 262       TLI.setUnavailable(LibFunc_atanh);
 263       TLI.setUnavailable(LibFunc_atanhf);
 264       TLI.setAvailableWithName(LibFunc_cabs, "_cabs");
 265       TLI.setUnavailable(LibFunc_cabsf);
 266       TLI.setUnavailable(LibFunc_cbrt);
 267       TLI.setUnavailable(LibFunc_cbrtf);
 268       TLI.setAvailableWithName(LibFunc_copysign, "_copysign");
 269       TLI.setAvailableWithName(LibFunc_copysignf, "_copysignf");
 270       TLI.setUnavailable(LibFunc_exp2);
 271       TLI.setUnavailable(LibFunc_exp2f);
 272       TLI.setUnavailable(LibFunc_expm1);
 273       TLI.setUnavailable(LibFunc_expm1f);
 274       TLI.setUnavailable(LibFunc_fmax);
 275       TLI.setUnavailable(LibFunc_fmaxf);
 276       TLI.setUnavailable(LibFunc_fmin);
 277       TLI.setUnavailable(LibFunc_fminf);
 278       TLI.setUnavailable(LibFunc_log1p);
 279       TLI.setUnavailable(LibFunc_log1pf);
 280       TLI.setUnavailable(LibFunc_log2);
 281       TLI.setUnavailable(LibFunc_log2f);
 282       TLI.setAvailableWithName(LibFunc_logb, "_logb");
 283       if (hasPartialFloat)
 284         TLI.setAvailableWithName(LibFunc_logbf, "_logbf");
 285       else
 286         TLI.setUnavailable(LibFunc_logbf);
 287       TLI.setUnavailable(LibFunc_rint);
 288       TLI.setUnavailable(LibFunc_rintf);
 289       TLI.setUnavailable(LibFunc_round);
 290       TLI.setUnavailable(LibFunc_roundf);
 291       TLI.setUnavailable(LibFunc_trunc);
 292       TLI.setUnavailable(LibFunc_truncf);
 293     }
 294
 295     // Win32 does not support long double C99 math functions.
 296     TLI.setUnavailable(LibFunc_acoshl);
 297     TLI.setUnavailable(LibFunc_asinhl);
 298     TLI.setUnavailable(LibFunc_atanhl);
 299     TLI.setUnavailable(LibFunc_cabsl);
 300     TLI.setUnavailable(LibFunc_cbrtl);
 301     TLI.setUnavailable(LibFunc_copysignl);
 302     TLI.setUnavailable(LibFunc_exp2l);
 303     TLI.setUnavailable(LibFunc_expm1l);
 304     TLI.setUnavailable(LibFunc_fmaxl);
 305     TLI.setUnavailable(LibFunc_fminl);
 306     TLI.setUnavailable(LibFunc_log1pl);
 307     TLI.setUnavailable(LibFunc_log2l);
 308     TLI.setUnavailable(LibFunc_logbl);
 309     TLI.setUnavailable(LibFunc_nearbyintl);
 310     TLI.setUnavailable(LibFunc_rintl);
 311     TLI.setUnavailable(LibFunc_roundl);
 312     TLI.setUnavailable(LibFunc_truncl);
 313
 314     // Win32 does not support these functions, but
 315     // they are generally available on POSIX-compliant systems.
 316     TLI.setUnavailable(LibFunc_access);
 317     TLI.setUnavailable(LibFunc_bcmp);
 318     TLI.setUnavailable(LibFunc_bcopy);
 319     TLI.setUnavailable(LibFunc_bzero);
 320     TLI.setUnavailable(LibFunc_chmod);
 321     TLI.setUnavailable(LibFunc_chown);
 322     TLI.setUnavailable(LibFunc_closedir);
 323     TLI.setUnavailable(LibFunc_ctermid);
 324     TLI.setUnavailable(LibFunc_fdopen);
 325     TLI.setUnavailable(LibFunc_ffs);
 326     TLI.setUnavailable(LibFunc_fileno);
 327     TLI.setUnavailable(LibFunc_flockfile);
 328     TLI.setUnavailable(LibFunc_fseeko);
 329     TLI.setUnavailable(LibFunc_fstat);
 330     TLI.setUnavailable(LibFunc_fstatvfs);
 331     TLI.setUnavailable(LibFunc_ftello);
 332     TLI.setUnavailable(LibFunc_ftrylockfile);
 333     TLI.setUnavailable(LibFunc_funlockfile);
 334     TLI.setUnavailable(LibFunc_getitimer);
 335     TLI.setUnavailable(LibFunc_getlogin_r);
 336     TLI.setUnavailable(LibFunc_getpwnam);
 337     TLI.setUnavailable(LibFunc_gettimeofday);
 338     TLI.setUnavailable(LibFunc_htonl);
 339     TLI.setUnavailable(LibFunc_htons);
 340     TLI.setUnavailable(LibFunc_lchown);
 341     TLI.setUnavailable(LibFunc_lstat);
 342     TLI.setUnavailable(LibFunc_memccpy);
 343     TLI.setUnavailable(LibFunc_mkdir);
 344     TLI.setUnavailable(LibFunc_ntohl);
 345     TLI.setUnavailable(LibFunc_ntohs);
 346     TLI.setUnavailable(LibFunc_open);
 347     TLI.setUnavailable(LibFunc_opendir);
 348     TLI.setUnavailable(LibFunc_pclose);
 349     TLI.setUnavailable(LibFunc_popen);
 350     TLI.setUnavailable(LibFunc_pread);
 351     TLI.setUnavailable(LibFunc_pwrite);
 352     TLI.setUnavailable(LibFunc_read);
 353     TLI.setUnavailable(LibFunc_readlink);
 354     TLI.setUnavailable(LibFunc_realpath);
 355     TLI.setUnavailable(LibFunc_rmdir);
 356     TLI.setUnavailable(LibFunc_setitimer);
 357     TLI.setUnavailable(LibFunc_stat);
 358     TLI.setUnavailable(LibFunc_statvfs);
 359     TLI.setUnavailable(LibFunc_stpcpy);
 360     TLI.setUnavailable(LibFunc_stpncpy);
 361     TLI.setUnavailable(LibFunc_strcasecmp);
 362     TLI.setUnavailable(LibFunc_strncasecmp);
 363     TLI.setUnavailable(LibFunc_times);
 364     TLI.setUnavailable(LibFunc_uname);
 365     TLI.setUnavailable(LibFunc_unlink);
 366     TLI.setUnavailable(LibFunc_unsetenv);
 367     TLI.setUnavailable(LibFunc_utime);
 368     TLI.setUnavailable(LibFunc_utimes);
 369     TLI.setUnavailable(LibFunc_write);
 370   }
 371
 372   switch (T.getOS()) {
 373   case Triple::MacOSX:
 374     // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0
 375     // and their names are __exp10 and __exp10f. exp10l is not available on
 376     // OS X or iOS.
 377     TLI.setUnavailable(LibFunc_exp10l);
 378     if (T.isMacOSXVersionLT(10, 9)) {
 379       TLI.setUnavailable(LibFunc_exp10);
 380       TLI.setUnavailable(LibFunc_exp10f);
 381     } else {
 382       TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
 383       TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
 384     }
 385     break;
 386   case Triple::IOS:
 387   case Triple::TvOS:
 388   case Triple::WatchOS:
 389     TLI.setUnavailable(LibFunc_exp10l);
 390     if (!T.isWatchOS() && (T.isOSVersionLT(7, 0) ||
 391                            (T.isOSVersionLT(9, 0) &&
 392                             (T.getArch() == Triple::x86 ||
 393                              T.getArch() == Triple::x86_64)))) {
 394       TLI.setUnavailable(LibFunc_exp10);
 395       TLI.setUnavailable(LibFunc_exp10f);
 396     } else {
 397       TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
 398       TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
 399     }
 400     break;
 401   case Triple::Linux:
 402     // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
 403     // buggy prior to glibc version 2.18. Until this version is widely deployed
 404     // or we have a reasonable detection strategy, we cannot use exp10 reliably
 405     // on Linux.
 406     //
 407     // Fall through to disable all of them.
 408     LLVM_FALLTHROUGH;
 409   default:
 410     TLI.setUnavailable(LibFunc_exp10);
 411     TLI.setUnavailable(LibFunc_exp10f);
 412     TLI.setUnavailable(LibFunc_exp10l);
 413   }
 414
 415   // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
 416   // Linux (GLIBC):
 417   // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
 418   // http://svn.freebsd.org/base/head/lib/libc/string/ffsl.c
 419   // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
 420   switch (T.getOS()) {
 421   case Triple::Darwin:
 422   case Triple::MacOSX:
 423   case Triple::IOS:
 424   case Triple::TvOS:
 425   case Triple::WatchOS:
 426   case Triple::FreeBSD:
 427   case Triple::Linux:
 428     break;
 429   default:
 430     TLI.setUnavailable(LibFunc_ffsl);
 431   }
 432
 433   // ffsll is available on at least FreeBSD and Linux (GLIBC):
 434   // http://svn.freebsd.org/base/head/lib/libc/string/ffsll.c
 435   // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
 436   switch (T.getOS()) {
 437   case Triple::Darwin:
 438   case Triple::MacOSX:
 439   case Triple::IOS:
 440   case Triple::TvOS:
 441   case Triple::WatchOS:
 442   case Triple::FreeBSD:
 443   case Triple::Linux:
 444     break;
 445   default:
 446     TLI.setUnavailable(LibFunc_ffsll);
 447   }
 448
 449   // The following functions are available on at least FreeBSD:
 450   // http://svn.freebsd.org/base/head/lib/libc/string/fls.c
 451   // http://svn.freebsd.org/base/head/lib/libc/string/flsl.c
 452   // http://svn.freebsd.org/base/head/lib/libc/string/flsll.c
 453   if (!T.isOSFreeBSD()) {
 454     TLI.setUnavailable(LibFunc_fls);
 455     TLI.setUnavailable(LibFunc_flsl);
 456     TLI.setUnavailable(LibFunc_flsll);
 457   }
 458
 459   // The following functions are only available on GNU/Linux (using glibc).
 460   // Linux variants without glibc (eg: bionic, musl) may have some subset.
 461   if (!T.isOSLinux() || !T.isGNUEnvironment()) {
 462     TLI.setUnavailable(LibFunc_dunder_strdup);
 463     TLI.setUnavailable(LibFunc_dunder_strtok_r);
 464     TLI.setUnavailable(LibFunc_dunder_isoc99_scanf);
 465     TLI.setUnavailable(LibFunc_dunder_isoc99_sscanf);
 466     TLI.setUnavailable(LibFunc_under_IO_getc);
 467     TLI.setUnavailable(LibFunc_under_IO_putc);
 468     // But, Android and musl have memalign.
 469     if (!T.isAndroid() && !T.isMusl())
 470       TLI.setUnavailable(LibFunc_memalign);
 471     TLI.setUnavailable(LibFunc_fopen64);
 472     TLI.setUnavailable(LibFunc_fseeko64);
 473     TLI.setUnavailable(LibFunc_fstat64);
 474     TLI.setUnavailable(LibFunc_fstatvfs64);
 475     TLI.setUnavailable(LibFunc_ftello64);
 476     TLI.setUnavailable(LibFunc_lstat64);
 477     TLI.setUnavailable(LibFunc_open64);
 478     TLI.setUnavailable(LibFunc_stat64);
 479     TLI.setUnavailable(LibFunc_statvfs64);
 480     TLI.setUnavailable(LibFunc_tmpfile64);
 481
 482     // Relaxed math functions are included in math-finite.h on Linux (GLIBC).
 483     TLI.setUnavailable(LibFunc_acos_finite);
 484     TLI.setUnavailable(LibFunc_acosf_finite);
 485     TLI.setUnavailable(LibFunc_acosl_finite);
 486     TLI.setUnavailable(LibFunc_acosh_finite);
 487     TLI.setUnavailable(LibFunc_acoshf_finite);
 488     TLI.setUnavailable(LibFunc_acoshl_finite);
 489     TLI.setUnavailable(LibFunc_asin_finite);
 490     TLI.setUnavailable(LibFunc_asinf_finite);
 491     TLI.setUnavailable(LibFunc_asinl_finite);
 492     TLI.setUnavailable(LibFunc_atan2_finite);
 493     TLI.setUnavailable(LibFunc_atan2f_finite);
 494     TLI.setUnavailable(LibFunc_atan2l_finite);
 495     TLI.setUnavailable(LibFunc_atanh_finite);
 496     TLI.setUnavailable(LibFunc_atanhf_finite);
 497     TLI.setUnavailable(LibFunc_atanhl_finite);
 498     TLI.setUnavailable(LibFunc_cosh_finite);
 499     TLI.setUnavailable(LibFunc_coshf_finite);
 500     TLI.setUnavailable(LibFunc_coshl_finite);
 501     TLI.setUnavailable(LibFunc_exp10_finite);
 502     TLI.setUnavailable(LibFunc_exp10f_finite);
 503     TLI.setUnavailable(LibFunc_exp10l_finite);
 504     TLI.setUnavailable(LibFunc_exp2_finite);
 505     TLI.setUnavailable(LibFunc_exp2f_finite);
 506     TLI.setUnavailable(LibFunc_exp2l_finite);
 507     TLI.setUnavailable(LibFunc_exp_finite);
 508     TLI.setUnavailable(LibFunc_expf_finite);
 509     TLI.setUnavailable(LibFunc_expl_finite);
 510     TLI.setUnavailable(LibFunc_log10_finite);
 511     TLI.setUnavailable(LibFunc_log10f_finite);
 512     TLI.setUnavailable(LibFunc_log10l_finite);
 513     TLI.setUnavailable(LibFunc_log2_finite);
 514     TLI.setUnavailable(LibFunc_log2f_finite);
 515     TLI.setUnavailable(LibFunc_log2l_finite);
 516     TLI.setUnavailable(LibFunc_log_finite);
 517     TLI.setUnavailable(LibFunc_logf_finite);
 518     TLI.setUnavailable(LibFunc_logl_finite);
 519     TLI.setUnavailable(LibFunc_pow_finite);
 520     TLI.setUnavailable(LibFunc_powf_finite);
 521     TLI.setUnavailable(LibFunc_powl_finite);
 522     TLI.setUnavailable(LibFunc_sinh_finite);
 523     TLI.setUnavailable(LibFunc_sinhf_finite);
 524     TLI.setUnavailable(LibFunc_sinhl_finite);
 525   }
 526
 527   if ((T.isOSLinux() && T.isGNUEnvironment()) ||
 528       (T.isAndroid() && !T.isAndroidVersionLT(28))) {
 529     // available IO unlocked variants on GNU/Linux and Android P or later
 530     TLI.setAvailable(LibFunc_getc_unlocked);
 531     TLI.setAvailable(LibFunc_getchar_unlocked);
 532     TLI.setAvailable(LibFunc_putc_unlocked);
 533     TLI.setAvailable(LibFunc_putchar_unlocked);
 534     TLI.setAvailable(LibFunc_fputc_unlocked);
 535     TLI.setAvailable(LibFunc_fgetc_unlocked);
 536     TLI.setAvailable(LibFunc_fread_unlocked);
 537     TLI.setAvailable(LibFunc_fwrite_unlocked);
 538     TLI.setAvailable(LibFunc_fputs_unlocked);
 539     TLI.setAvailable(LibFunc_fgets_unlocked);
 540   }
 541
 542   // As currently implemented in clang, NVPTX code has no standard library to
 543   // speak of.  Headers provide a standard-ish library implementation, but many
 544   // of the signatures are wrong -- for example, many libm functions are not
 545   // extern "C".
 546   //
 547   // libdevice, an IR library provided by nvidia, is linked in by the front-end,
 548   // but only used functions are provided to llvm.  Moreover, most of the
 549   // functions in libdevice don't map precisely to standard library functions.
 550   //
 551   // FIXME: Having no standard library prevents e.g. many fastmath
 552   // optimizations, so this situation should be fixed.
 553   if (T.isNVPTX()) {
 554     TLI.disableAllFunctions();
 555     TLI.setAvailable(LibFunc_nvvm_reflect);
 556   } else {
 557     TLI.setUnavailable(LibFunc_nvvm_reflect);
 558   }
 559
 560   TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
 561 }
 562
 563 TargetLibraryInfoImpl::TargetLibraryInfoImpl() {
 564   // Default to everything being available.
 565   memset(AvailableArray, -1, sizeof(AvailableArray));
 566
 567   initialize(*this, Triple(), StandardNames);
 568 }
 569
 570 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) {
 571   // Default to everything being available.
 572   memset(AvailableArray, -1, sizeof(AvailableArray));
 573
 574   initialize(*this, T, StandardNames);
 575 }
 576
 577 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI)
 578     : CustomNames(TLI.CustomNames), ShouldExtI32Param(TLI.ShouldExtI32Param),
 579       ShouldExtI32Return(TLI.ShouldExtI32Return),
 580       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param) {
 581   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
 582   VectorDescs = TLI.VectorDescs;
 583   ScalarDescs = TLI.ScalarDescs;
 584 }
 585
 586 TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI)
 587     : CustomNames(std::move(TLI.CustomNames)),
 588       ShouldExtI32Param(TLI.ShouldExtI32Param),
 589       ShouldExtI32Return(TLI.ShouldExtI32Return),
 590       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param) {
 591   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
 592             AvailableArray);
 593   VectorDescs = TLI.VectorDescs;
 594   ScalarDescs = TLI.ScalarDescs;
 595 }
 596
 597 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) {
 598   CustomNames = TLI.CustomNames;
 599   ShouldExtI32Param = TLI.ShouldExtI32Param;
 600   ShouldExtI32Return = TLI.ShouldExtI32Return;
 601   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
 602   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
 603   return *this;
 604 }
 605
 606 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) {
 607   CustomNames = std::move(TLI.CustomNames);
 608   ShouldExtI32Param = TLI.ShouldExtI32Param;
 609   ShouldExtI32Return = TLI.ShouldExtI32Return;
 610   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
 611   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
 612             AvailableArray);
 613   return *this;
 614 }
 615
 616 static StringRef sanitizeFunctionName(StringRef funcName) {
 617   // Filter out empty names and names containing null bytes, those can't be in
 618   // our table.
 619   if (funcName.empty() || funcName.find('\0') != StringRef::npos)
 620     return StringRef();
 621
 622   // Check for \01 prefix that is used to mangle __asm declarations and
 623   // strip it if present.
 624   return GlobalValue::dropLLVMManglingEscape(funcName);
 625 }
 626
 627 bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName,
 628                                        LibFunc &F) const {
 629   StringRef const *Start = &StandardNames[0];
 630   StringRef const *End = &StandardNames[NumLibFuncs];
 631
 632   funcName = sanitizeFunctionName(funcName);
 633   if (funcName.empty())
 634     return false;
 635
 636   StringRef const *I = std::lower_bound(
 637       Start, End, funcName, [](StringRef LHS, StringRef RHS) {
 638         return LHS < RHS;
 639       });
 640   if (I != End && *I == funcName) {
 641     F = (LibFunc)(I - Start);
 642     return true;
 643   }
 644   return false;
 645 }
 646
 647 bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy,
 648                                                    LibFunc F,
 649                                                    const DataLayout *DL) const {
 650   LLVMContext &Ctx = FTy.getContext();
 651   Type *PCharTy = Type::getInt8PtrTy(Ctx);
 652   Type *SizeTTy = DL ? DL->getIntPtrType(Ctx, /*AS=*/0) : nullptr;
 653   auto IsSizeTTy = [SizeTTy](Type *Ty) {
 654     return SizeTTy ? Ty == SizeTTy : Ty->isIntegerTy();
 655   };
 656   unsigned NumParams = FTy.getNumParams();
 657
 658   switch (F) {
 659   case LibFunc_execl:
 660   case LibFunc_execlp:
 661   case LibFunc_execle:
 662     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 663             FTy.getParamType(1)->isPointerTy() &&
 664             FTy.getReturnType()->isIntegerTy(32));
 665   case LibFunc_execv:
 666   case LibFunc_execvp:
 667     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
 668             FTy.getParamType(1)->isPointerTy() &&
 669             FTy.getReturnType()->isIntegerTy(32));
 670   case LibFunc_execvP:
 671   case LibFunc_execvpe:
 672   case LibFunc_execve:
 673     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 674             FTy.getParamType(1)->isPointerTy() &&
 675             FTy.getParamType(2)->isPointerTy() &&
 676             FTy.getReturnType()->isIntegerTy(32));
 677   case LibFunc_strlen:
 678     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
 679             FTy.getReturnType()->isIntegerTy());
 680
 681   case LibFunc_strchr:
 682   case LibFunc_strrchr:
 683     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 684             FTy.getParamType(0) == FTy.getReturnType() &&
 685             FTy.getParamType(1)->isIntegerTy());
 686
 687   case LibFunc_strtol:
 688   case LibFunc_strtod:
 689   case LibFunc_strtof:
 690   case LibFunc_strtoul:
 691   case LibFunc_strtoll:
 692   case LibFunc_strtold:
 693   case LibFunc_strtoull:
 694     return ((NumParams == 2 || NumParams == 3) &&
 695             FTy.getParamType(0)->isPointerTy() &&
 696             FTy.getParamType(1)->isPointerTy());
 697   case LibFunc_strcat_chk:
 698     --NumParams;
 699     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 700       return false;
 701     LLVM_FALLTHROUGH;
 702   case LibFunc_strcat:
 703     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 704             FTy.getParamType(0) == FTy.getReturnType() &&
 705             FTy.getParamType(1) == FTy.getReturnType());
 706
 707   case LibFunc_strncat_chk:
 708     --NumParams;
 709     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 710       return false;
 711     LLVM_FALLTHROUGH;
 712   case LibFunc_strncat:
 713     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
 714             FTy.getParamType(0) == FTy.getReturnType() &&
 715             FTy.getParamType(1) == FTy.getReturnType() &&
 716             IsSizeTTy(FTy.getParamType(2)));
 717
 718   case LibFunc_strcpy_chk:
 719   case LibFunc_stpcpy_chk:
 720     --NumParams;
 721     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 722       return false;
 723     LLVM_FALLTHROUGH;
 724   case LibFunc_strcpy:
 725   case LibFunc_stpcpy:
 726     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(0) &&
 727             FTy.getParamType(0) == FTy.getParamType(1) &&
 728             FTy.getParamType(0) == PCharTy);
 729
 730   case LibFunc_strlcat_chk:
 731   case LibFunc_strlcpy_chk:
 732     --NumParams;
 733     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 734       return false;
 735     LLVM_FALLTHROUGH;
 736   case LibFunc_strlcat:
 737   case LibFunc_strlcpy:
 738     return NumParams == 3 && IsSizeTTy(FTy.getReturnType()) &&
 739            FTy.getParamType(0)->isPointerTy() &&
 740            FTy.getParamType(1)->isPointerTy() &&
 741            IsSizeTTy(FTy.getParamType(2));
 742
 743   case LibFunc_strncpy_chk:
 744   case LibFunc_stpncpy_chk:
 745     --NumParams;
 746     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 747       return false;
 748     LLVM_FALLTHROUGH;
 749   case LibFunc_strncpy:
 750   case LibFunc_stpncpy:
 751     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
 752             FTy.getParamType(0) == FTy.getParamType(1) &&
 753             FTy.getParamType(0) == PCharTy &&
 754             IsSizeTTy(FTy.getParamType(2)));
 755
 756   case LibFunc_strxfrm:
 757     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 758             FTy.getParamType(1)->isPointerTy());
 759
 760   case LibFunc_strcmp:
 761     return (NumParams == 2 && FTy.getReturnType()->isIntegerTy(32) &&
 762             FTy.getParamType(0)->isPointerTy() &&
 763             FTy.getParamType(0) == FTy.getParamType(1));
 764
 765   case LibFunc_strncmp:
 766     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
 767             FTy.getParamType(0)->isPointerTy() &&
 768             FTy.getParamType(0) == FTy.getParamType(1) &&
 769             IsSizeTTy(FTy.getParamType(2)));
 770
 771   case LibFunc_strspn:
 772   case LibFunc_strcspn:
 773     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
 774             FTy.getParamType(0) == FTy.getParamType(1) &&
 775             FTy.getReturnType()->isIntegerTy());
 776
 777   case LibFunc_strcoll:
 778   case LibFunc_strcasecmp:
 779   case LibFunc_strncasecmp:
 780     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 781             FTy.getParamType(1)->isPointerTy());
 782
 783   case LibFunc_strstr:
 784     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 785             FTy.getParamType(0)->isPointerTy() &&
 786             FTy.getParamType(1)->isPointerTy());
 787
 788   case LibFunc_strpbrk:
 789     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
 790             FTy.getReturnType() == FTy.getParamType(0) &&
 791             FTy.getParamType(0) == FTy.getParamType(1));
 792
 793   case LibFunc_strtok:
 794   case LibFunc_strtok_r:
 795     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
 796   case LibFunc_scanf:
 797   case LibFunc_setbuf:
 798   case LibFunc_setvbuf:
 799     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
 800   case LibFunc_strdup:
 801   case LibFunc_strndup:
 802     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
 803             FTy.getParamType(0)->isPointerTy());
 804   case LibFunc_sscanf:
 805   case LibFunc_stat:
 806   case LibFunc_statvfs:
 807   case LibFunc_siprintf:
 808   case LibFunc_small_sprintf:
 809   case LibFunc_sprintf:
 810     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 811             FTy.getParamType(1)->isPointerTy() &&
 812             FTy.getReturnType()->isIntegerTy(32));
 813
 814   case LibFunc_sprintf_chk:
 815     return NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
 816            FTy.getParamType(1)->isIntegerTy(32) &&
 817            IsSizeTTy(FTy.getParamType(2)) &&
 818            FTy.getParamType(3)->isPointerTy() &&
 819            FTy.getReturnType()->isIntegerTy(32);
 820
 821   case LibFunc_snprintf:
 822     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 823             FTy.getParamType(2)->isPointerTy() &&
 824             FTy.getReturnType()->isIntegerTy(32));
 825
 826   case LibFunc_snprintf_chk:
 827     return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
 828            IsSizeTTy(FTy.getParamType(1)) &&
 829            FTy.getParamType(2)->isIntegerTy(32) &&
 830            IsSizeTTy(FTy.getParamType(3)) &&
 831            FTy.getParamType(4)->isPointerTy() &&
 832            FTy.getReturnType()->isIntegerTy(32);
 833
 834   case LibFunc_setitimer:
 835     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
 836             FTy.getParamType(2)->isPointerTy());
 837   case LibFunc_system:
 838     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
 839   case LibFunc_malloc:
 840     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
 841   case LibFunc_memcmp:
 842     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
 843             FTy.getParamType(0)->isPointerTy() &&
 844             FTy.getParamType(1)->isPointerTy());
 845
 846   case LibFunc_memchr:
 847   case LibFunc_memrchr:
 848     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
 849             FTy.getReturnType() == FTy.getParamType(0) &&
 850             FTy.getParamType(1)->isIntegerTy(32) &&
 851             IsSizeTTy(FTy.getParamType(2)));
 852   case LibFunc_modf:
 853   case LibFunc_modff:
 854   case LibFunc_modfl:
 855     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
 856
 857   case LibFunc_memcpy_chk:
 858   case LibFunc_memmove_chk:
 859     --NumParams;
 860     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 861       return false;
 862     LLVM_FALLTHROUGH;
 863   case LibFunc_memcpy:
 864   case LibFunc_mempcpy:
 865   case LibFunc_memmove:
 866     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
 867             FTy.getParamType(0)->isPointerTy() &&
 868             FTy.getParamType(1)->isPointerTy() &&
 869             IsSizeTTy(FTy.getParamType(2)));
 870
 871   case LibFunc_memset_chk:
 872     --NumParams;
 873     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 874       return false;
 875     LLVM_FALLTHROUGH;
 876   case LibFunc_memset:
 877     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
 878             FTy.getParamType(0)->isPointerTy() &&
 879             FTy.getParamType(1)->isIntegerTy() &&
 880             IsSizeTTy(FTy.getParamType(2)));
 881
 882   case LibFunc_memccpy_chk:
 883       --NumParams;
 884     if (!IsSizeTTy(FTy.getParamType(NumParams)))
 885       return false;
 886     LLVM_FALLTHROUGH;
 887   case LibFunc_memccpy:
 888     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
 889   case LibFunc_memalign:
 890     return (FTy.getReturnType()->isPointerTy());
 891   case LibFunc_realloc:
 892   case LibFunc_reallocf:
 893     return (NumParams == 2 && FTy.getReturnType() == PCharTy &&
 894             FTy.getParamType(0) == FTy.getReturnType() &&
 895             IsSizeTTy(FTy.getParamType(1)));
 896   case LibFunc_read:
 897     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
 898   case LibFunc_rewind:
 899   case LibFunc_rmdir:
 900   case LibFunc_remove:
 901   case LibFunc_realpath:
 902     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
 903   case LibFunc_rename:
 904     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 905             FTy.getParamType(1)->isPointerTy());
 906   case LibFunc_readlink:
 907     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
 908             FTy.getParamType(1)->isPointerTy());
 909   case LibFunc_write:
 910     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
 911   case LibFunc_bcopy:
 912   case LibFunc_bcmp:
 913     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 914             FTy.getParamType(1)->isPointerTy());
 915   case LibFunc_bzero:
 916     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
 917   case LibFunc_calloc:
 918     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
 919
 920   case LibFunc_atof:
 921   case LibFunc_atoi:
 922   case LibFunc_atol:
 923   case LibFunc_atoll:
 924   case LibFunc_ferror:
 925   case LibFunc_getenv:
 926   case LibFunc_getpwnam:
 927   case LibFunc_iprintf:
 928   case LibFunc_small_printf:
 929   case LibFunc_pclose:
 930   case LibFunc_perror:
 931   case LibFunc_printf:
 932   case LibFunc_puts:
 933   case LibFunc_uname:
 934   case LibFunc_under_IO_getc:
 935   case LibFunc_unlink:
 936   case LibFunc_unsetenv:
 937     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
 938
 939   case LibFunc_access:
 940   case LibFunc_chmod:
 941   case LibFunc_chown:
 942   case LibFunc_clearerr:
 943   case LibFunc_closedir:
 944   case LibFunc_ctermid:
 945   case LibFunc_fclose:
 946   case LibFunc_feof:
 947   case LibFunc_fflush:
 948   case LibFunc_fgetc:
 949   case LibFunc_fgetc_unlocked:
 950   case LibFunc_fileno:
 951   case LibFunc_flockfile:
 952   case LibFunc_free:
 953   case LibFunc_fseek:
 954   case LibFunc_fseeko64:
 955   case LibFunc_fseeko:
 956   case LibFunc_fsetpos:
 957   case LibFunc_ftell:
 958   case LibFunc_ftello64:
 959   case LibFunc_ftello:
 960   case LibFunc_ftrylockfile:
 961   case LibFunc_funlockfile:
 962   case LibFunc_getc:
 963   case LibFunc_getc_unlocked:
 964   case LibFunc_getlogin_r:
 965   case LibFunc_mkdir:
 966   case LibFunc_mktime:
 967   case LibFunc_times:
 968     return (NumParams != 0 && FTy.getParamType(0)->isPointerTy());
 969
 970   case LibFunc_fopen:
 971     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 972             FTy.getParamType(0)->isPointerTy() &&
 973             FTy.getParamType(1)->isPointerTy());
 974   case LibFunc_fork:
 975     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy(32));
 976   case LibFunc_fdopen:
 977     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
 978             FTy.getParamType(1)->isPointerTy());
 979   case LibFunc_fputc:
 980   case LibFunc_fputc_unlocked:
 981   case LibFunc_fstat:
 982   case LibFunc_frexp:
 983   case LibFunc_frexpf:
 984   case LibFunc_frexpl:
 985   case LibFunc_fstatvfs:
 986     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
 987   case LibFunc_fgets:
 988   case LibFunc_fgets_unlocked:
 989     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
 990             FTy.getParamType(2)->isPointerTy());
 991   case LibFunc_fread:
 992   case LibFunc_fread_unlocked:
 993     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
 994             FTy.getParamType(3)->isPointerTy());
 995   case LibFunc_fwrite:
 996   case LibFunc_fwrite_unlocked:
 997     return (NumParams == 4 && FTy.getReturnType()->isIntegerTy() &&
 998             FTy.getParamType(0)->isPointerTy() &&
 999             FTy.getParamType(1)->isIntegerTy() &&
1000             FTy.getParamType(2)->isIntegerTy() &&
1001             FTy.getParamType(3)->isPointerTy());
1002   case LibFunc_fputs:
1003   case LibFunc_fputs_unlocked:
1004     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1005             FTy.getParamType(1)->isPointerTy());
1006   case LibFunc_fscanf:
1007   case LibFunc_fiprintf:
1008   case LibFunc_small_fprintf:
1009   case LibFunc_fprintf:
1010     return (NumParams >= 2 && FTy.getReturnType()->isIntegerTy() &&
1011             FTy.getParamType(0)->isPointerTy() &&
1012             FTy.getParamType(1)->isPointerTy());
1013   case LibFunc_fgetpos:
1014     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1015             FTy.getParamType(1)->isPointerTy());
1016   case LibFunc_getchar:
1017   case LibFunc_getchar_unlocked:
1018     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy());
1019   case LibFunc_gets:
1020     return (NumParams == 1 && FTy.getParamType(0) == PCharTy);
1021   case LibFunc_getitimer:
1022     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1023   case LibFunc_ungetc:
1024     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1025   case LibFunc_utime:
1026   case LibFunc_utimes:
1027     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1028             FTy.getParamType(1)->isPointerTy());
1029   case LibFunc_putc:
1030   case LibFunc_putc_unlocked:
1031     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1032   case LibFunc_pread:
1033   case LibFunc_pwrite:
1034     return (NumParams == 4 && FTy.getParamType(1)->isPointerTy());
1035   case LibFunc_popen:
1036     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1037             FTy.getParamType(0)->isPointerTy() &&
1038             FTy.getParamType(1)->isPointerTy());
1039   case LibFunc_vscanf:
1040     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1041   case LibFunc_vsscanf:
1042     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1043             FTy.getParamType(2)->isPointerTy());
1044   case LibFunc_vfscanf:
1045     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1046             FTy.getParamType(2)->isPointerTy());
1047   case LibFunc_valloc:
1048     return (FTy.getReturnType()->isPointerTy());
1049   case LibFunc_vprintf:
1050     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1051   case LibFunc_vfprintf:
1052   case LibFunc_vsprintf:
1053     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1054             FTy.getParamType(1)->isPointerTy());
1055   case LibFunc_vsprintf_chk:
1056     return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
1057            FTy.getParamType(1)->isIntegerTy(32) &&
1058            IsSizeTTy(FTy.getParamType(2)) && FTy.getParamType(3)->isPointerTy();
1059   case LibFunc_vsnprintf:
1060     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1061             FTy.getParamType(2)->isPointerTy());
1062   case LibFunc_vsnprintf_chk:
1063     return NumParams == 6 && FTy.getParamType(0)->isPointerTy() &&
1064            FTy.getParamType(2)->isIntegerTy(32) &&
1065            IsSizeTTy(FTy.getParamType(3)) && FTy.getParamType(4)->isPointerTy();
1066   case LibFunc_open:
1067     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1068   case LibFunc_opendir:
1069     return (NumParams == 1 && FTy.getReturnType()->isPointerTy() &&
1070             FTy.getParamType(0)->isPointerTy());
1071   case LibFunc_tmpfile:
1072     return (FTy.getReturnType()->isPointerTy());
1073   case LibFunc_htonl:
1074   case LibFunc_ntohl:
1075     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1076             FTy.getReturnType() == FTy.getParamType(0));
1077   case LibFunc_htons:
1078   case LibFunc_ntohs:
1079     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(16) &&
1080             FTy.getReturnType() == FTy.getParamType(0));
1081   case LibFunc_lstat:
1082     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1083             FTy.getParamType(1)->isPointerTy());
1084   case LibFunc_lchown:
1085     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1086   case LibFunc_qsort:
1087     return (NumParams == 4 && FTy.getParamType(3)->isPointerTy());
1088   case LibFunc_dunder_strdup:
1089   case LibFunc_dunder_strndup:
1090     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
1091             FTy.getParamType(0)->isPointerTy());
1092   case LibFunc_dunder_strtok_r:
1093     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1094   case LibFunc_under_IO_putc:
1095     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1096   case LibFunc_dunder_isoc99_scanf:
1097     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1098   case LibFunc_stat64:
1099   case LibFunc_lstat64:
1100   case LibFunc_statvfs64:
1101     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1102             FTy.getParamType(1)->isPointerTy());
1103   case LibFunc_dunder_isoc99_sscanf:
1104     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1105             FTy.getParamType(1)->isPointerTy());
1106   case LibFunc_fopen64:
1107     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1108             FTy.getParamType(0)->isPointerTy() &&
1109             FTy.getParamType(1)->isPointerTy());
1110   case LibFunc_tmpfile64:
1111     return (FTy.getReturnType()->isPointerTy());
1112   case LibFunc_fstat64:
1113   case LibFunc_fstatvfs64:
1114     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1115   case LibFunc_open64:
1116     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1117   case LibFunc_gettimeofday:
1118     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1119             FTy.getParamType(1)->isPointerTy());
1120
1121   // new(unsigned int);
1122   case LibFunc_Znwj:
1123   // new(unsigned long);
1124   case LibFunc_Znwm:
1125   // new[](unsigned int);
1126   case LibFunc_Znaj:
1127   // new[](unsigned long);
1128   case LibFunc_Znam:
1129   // new(unsigned int);
1130   case LibFunc_msvc_new_int:
1131   // new(unsigned long long);
1132   case LibFunc_msvc_new_longlong:
1133   // new[](unsigned int);
1134   case LibFunc_msvc_new_array_int:
1135   // new[](unsigned long long);
1136   case LibFunc_msvc_new_array_longlong:
1137     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
1138
1139   // new(unsigned int, nothrow);
1140   case LibFunc_ZnwjRKSt9nothrow_t:
1141   // new(unsigned long, nothrow);
1142   case LibFunc_ZnwmRKSt9nothrow_t:
1143   // new[](unsigned int, nothrow);
1144   case LibFunc_ZnajRKSt9nothrow_t:
1145   // new[](unsigned long, nothrow);
1146   case LibFunc_ZnamRKSt9nothrow_t:
1147   // new(unsigned int, nothrow);
1148   case LibFunc_msvc_new_int_nothrow:
1149   // new(unsigned long long, nothrow);
1150   case LibFunc_msvc_new_longlong_nothrow:
1151   // new[](unsigned int, nothrow);
1152   case LibFunc_msvc_new_array_int_nothrow:
1153   // new[](unsigned long long, nothrow);
1154   case LibFunc_msvc_new_array_longlong_nothrow:
1155   // new(unsigned int, align_val_t)
1156   case LibFunc_ZnwjSt11align_val_t:
1157   // new(unsigned long, align_val_t)
1158   case LibFunc_ZnwmSt11align_val_t:
1159   // new[](unsigned int, align_val_t)
1160   case LibFunc_ZnajSt11align_val_t:
1161   // new[](unsigned long, align_val_t)
1162   case LibFunc_ZnamSt11align_val_t:
1163     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
1164
1165   // new(unsigned int, align_val_t, nothrow)
1166   case LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t:
1167   // new(unsigned long, align_val_t, nothrow)
1168   case LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t:
1169   // new[](unsigned int, align_val_t, nothrow)
1170   case LibFunc_ZnajSt11align_val_tRKSt9nothrow_t:
1171   // new[](unsigned long, align_val_t, nothrow)
1172   case LibFunc_ZnamSt11align_val_tRKSt9nothrow_t:
1173     return (NumParams == 3 && FTy.getReturnType()->isPointerTy());
1174
1175   // void operator delete[](void*);
1176   case LibFunc_ZdaPv:
1177   // void operator delete(void*);
1178   case LibFunc_ZdlPv:
1179   // void operator delete[](void*);
1180   case LibFunc_msvc_delete_array_ptr32:
1181   // void operator delete[](void*);
1182   case LibFunc_msvc_delete_array_ptr64:
1183   // void operator delete(void*);
1184   case LibFunc_msvc_delete_ptr32:
1185   // void operator delete(void*);
1186   case LibFunc_msvc_delete_ptr64:
1187     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1188
1189   // void operator delete[](void*, nothrow);
1190   case LibFunc_ZdaPvRKSt9nothrow_t:
1191   // void operator delete[](void*, unsigned int);
1192   case LibFunc_ZdaPvj:
1193   // void operator delete[](void*, unsigned long);
1194   case LibFunc_ZdaPvm:
1195   // void operator delete(void*, nothrow);
1196   case LibFunc_ZdlPvRKSt9nothrow_t:
1197   // void operator delete(void*, unsigned int);
1198   case LibFunc_ZdlPvj:
1199   // void operator delete(void*, unsigned long);
1200   case LibFunc_ZdlPvm:
1201   // void operator delete(void*, align_val_t)
1202   case LibFunc_ZdlPvSt11align_val_t:
1203   // void operator delete[](void*, align_val_t)
1204   case LibFunc_ZdaPvSt11align_val_t:
1205   // void operator delete[](void*, unsigned int);
1206   case LibFunc_msvc_delete_array_ptr32_int:
1207   // void operator delete[](void*, nothrow);
1208   case LibFunc_msvc_delete_array_ptr32_nothrow:
1209   // void operator delete[](void*, unsigned long long);
1210   case LibFunc_msvc_delete_array_ptr64_longlong:
1211   // void operator delete[](void*, nothrow);
1212   case LibFunc_msvc_delete_array_ptr64_nothrow:
1213   // void operator delete(void*, unsigned int);
1214   case LibFunc_msvc_delete_ptr32_int:
1215   // void operator delete(void*, nothrow);
1216   case LibFunc_msvc_delete_ptr32_nothrow:
1217   // void operator delete(void*, unsigned long long);
1218   case LibFunc_msvc_delete_ptr64_longlong:
1219   // void operator delete(void*, nothrow);
1220   case LibFunc_msvc_delete_ptr64_nothrow:
1221     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1222
1223   // void operator delete(void*, align_val_t, nothrow)
1224   case LibFunc_ZdlPvSt11align_val_tRKSt9nothrow_t:
1225   // void operator delete[](void*, align_val_t, nothrow)
1226   case LibFunc_ZdaPvSt11align_val_tRKSt9nothrow_t:
1227     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1228
1229   case LibFunc_memset_pattern16:
1230     return (!FTy.isVarArg() && NumParams == 3 &&
1231             FTy.getParamType(0)->isPointerTy() &&
1232             FTy.getParamType(1)->isPointerTy() &&
1233             FTy.getParamType(2)->isIntegerTy());
1234
1235   case LibFunc_cxa_guard_abort:
1236   case LibFunc_cxa_guard_acquire:
1237   case LibFunc_cxa_guard_release:
1238   case LibFunc_nvvm_reflect:
1239     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1240
1241   case LibFunc_sincospi_stret:
1242   case LibFunc_sincospif_stret:
1243     return (NumParams == 1 && FTy.getParamType(0)->isFloatingPointTy());
1244
1245   case LibFunc_acos:
1246   case LibFunc_acos_finite:
1247   case LibFunc_acosf:
1248   case LibFunc_acosf_finite:
1249   case LibFunc_acosh:
1250   case LibFunc_acosh_finite:
1251   case LibFunc_acoshf:
1252   case LibFunc_acoshf_finite:
1253   case LibFunc_acoshl:
1254   case LibFunc_acoshl_finite:
1255   case LibFunc_acosl:
1256   case LibFunc_acosl_finite:
1257   case LibFunc_asin:
1258   case LibFunc_asin_finite:
1259   case LibFunc_asinf:
1260   case LibFunc_asinf_finite:
1261   case LibFunc_asinh:
1262   case LibFunc_asinhf:
1263   case LibFunc_asinhl:
1264   case LibFunc_asinl:
1265   case LibFunc_asinl_finite:
1266   case LibFunc_atan:
1267   case LibFunc_atanf:
1268   case LibFunc_atanh:
1269   case LibFunc_atanh_finite:
1270   case LibFunc_atanhf:
1271   case LibFunc_atanhf_finite:
1272   case LibFunc_atanhl:
1273   case LibFunc_atanhl_finite:
1274   case LibFunc_atanl:
1275   case LibFunc_cbrt:
1276   case LibFunc_cbrtf:
1277   case LibFunc_cbrtl:
1278   case LibFunc_ceil:
1279   case LibFunc_ceilf:
1280   case LibFunc_ceill:
1281   case LibFunc_cos:
1282   case LibFunc_cosf:
1283   case LibFunc_cosh:
1284   case LibFunc_cosh_finite:
1285   case LibFunc_coshf:
1286   case LibFunc_coshf_finite:
1287   case LibFunc_coshl:
1288   case LibFunc_coshl_finite:
1289   case LibFunc_cosl:
1290   case LibFunc_exp10:
1291   case LibFunc_exp10_finite:
1292   case LibFunc_exp10f:
1293   case LibFunc_exp10f_finite:
1294   case LibFunc_exp10l:
1295   case LibFunc_exp10l_finite:
1296   case LibFunc_exp2:
1297   case LibFunc_exp2_finite:
1298   case LibFunc_exp2f:
1299   case LibFunc_exp2f_finite:
1300   case LibFunc_exp2l:
1301   case LibFunc_exp2l_finite:
1302   case LibFunc_exp:
1303   case LibFunc_exp_finite:
1304   case LibFunc_expf:
1305   case LibFunc_expf_finite:
1306   case LibFunc_expl:
1307   case LibFunc_expl_finite:
1308   case LibFunc_expm1:
1309   case LibFunc_expm1f:
1310   case LibFunc_expm1l:
1311   case LibFunc_fabs:
1312   case LibFunc_fabsf:
1313   case LibFunc_fabsl:
1314   case LibFunc_floor:
1315   case LibFunc_floorf:
1316   case LibFunc_floorl:
1317   case LibFunc_log10:
1318   case LibFunc_log10_finite:
1319   case LibFunc_log10f:
1320   case LibFunc_log10f_finite:
1321   case LibFunc_log10l:
1322   case LibFunc_log10l_finite:
1323   case LibFunc_log1p:
1324   case LibFunc_log1pf:
1325   case LibFunc_log1pl:
1326   case LibFunc_log2:
1327   case LibFunc_log2_finite:
1328   case LibFunc_log2f:
1329   case LibFunc_log2f_finite:
1330   case LibFunc_log2l:
1331   case LibFunc_log2l_finite:
1332   case LibFunc_log:
1333   case LibFunc_log_finite:
1334   case LibFunc_logb:
1335   case LibFunc_logbf:
1336   case LibFunc_logbl:
1337   case LibFunc_logf:
1338   case LibFunc_logf_finite:
1339   case LibFunc_logl:
1340   case LibFunc_logl_finite:
1341   case LibFunc_nearbyint:
1342   case LibFunc_nearbyintf:
1343   case LibFunc_nearbyintl:
1344   case LibFunc_rint:
1345   case LibFunc_rintf:
1346   case LibFunc_rintl:
1347   case LibFunc_round:
1348   case LibFunc_roundf:
1349   case LibFunc_roundl:
1350   case LibFunc_sin:
1351   case LibFunc_sinf:
1352   case LibFunc_sinh:
1353   case LibFunc_sinh_finite:
1354   case LibFunc_sinhf:
1355   case LibFunc_sinhf_finite:
1356   case LibFunc_sinhl:
1357   case LibFunc_sinhl_finite:
1358   case LibFunc_sinl:
1359   case LibFunc_sqrt:
1360   case LibFunc_sqrt_finite:
1361   case LibFunc_sqrtf:
1362   case LibFunc_sqrtf_finite:
1363   case LibFunc_sqrtl:
1364   case LibFunc_sqrtl_finite:
1365   case LibFunc_tan:
1366   case LibFunc_tanf:
1367   case LibFunc_tanh:
1368   case LibFunc_tanhf:
1369   case LibFunc_tanhl:
1370   case LibFunc_tanl:
1371   case LibFunc_trunc:
1372   case LibFunc_truncf:
1373   case LibFunc_truncl:
1374     return (NumParams == 1 && FTy.getReturnType()->isFloatingPointTy() &&
1375             FTy.getReturnType() == FTy.getParamType(0));
1376
1377   case LibFunc_atan2:
1378   case LibFunc_atan2_finite:
1379   case LibFunc_atan2f:
1380   case LibFunc_atan2f_finite:
1381   case LibFunc_atan2l:
1382   case LibFunc_atan2l_finite:
1383   case LibFunc_fmin:
1384   case LibFunc_fminf:
1385   case LibFunc_fminl:
1386   case LibFunc_fmax:
1387   case LibFunc_fmaxf:
1388   case LibFunc_fmaxl:
1389   case LibFunc_fmod:
1390   case LibFunc_fmodf:
1391   case LibFunc_fmodl:
1392   case LibFunc_copysign:
1393   case LibFunc_copysignf:
1394   case LibFunc_copysignl:
1395   case LibFunc_pow:
1396   case LibFunc_pow_finite:
1397   case LibFunc_powf:
1398   case LibFunc_powf_finite:
1399   case LibFunc_powl:
1400   case LibFunc_powl_finite:
1401     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1402             FTy.getReturnType() == FTy.getParamType(0) &&
1403             FTy.getReturnType() == FTy.getParamType(1));
1404
1405   case LibFunc_ldexp:
1406   case LibFunc_ldexpf:
1407   case LibFunc_ldexpl:
1408     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1409             FTy.getReturnType() == FTy.getParamType(0) &&
1410             FTy.getParamType(1)->isIntegerTy(32));
1411
1412   case LibFunc_ffs:
1413   case LibFunc_ffsl:
1414   case LibFunc_ffsll:
1415   case LibFunc_fls:
1416   case LibFunc_flsl:
1417   case LibFunc_flsll:
1418     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1419             FTy.getParamType(0)->isIntegerTy());
1420
1421   case LibFunc_isdigit:
1422   case LibFunc_isascii:
1423   case LibFunc_toascii:
1424   case LibFunc_putchar:
1425   case LibFunc_putchar_unlocked:
1426     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1427             FTy.getReturnType() == FTy.getParamType(0));
1428
1429   case LibFunc_abs:
1430   case LibFunc_labs:
1431   case LibFunc_llabs:
1432     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy() &&
1433             FTy.getReturnType() == FTy.getParamType(0));
1434
1435   case LibFunc_cxa_atexit:
1436     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy() &&
1437             FTy.getParamType(0)->isPointerTy() &&
1438             FTy.getParamType(1)->isPointerTy() &&
1439             FTy.getParamType(2)->isPointerTy());
1440
1441   case LibFunc_sinpi:
1442   case LibFunc_cospi:
1443     return (NumParams == 1 && FTy.getReturnType()->isDoubleTy() &&
1444             FTy.getReturnType() == FTy.getParamType(0));
1445
1446   case LibFunc_sinpif:
1447   case LibFunc_cospif:
1448     return (NumParams == 1 && FTy.getReturnType()->isFloatTy() &&
1449             FTy.getReturnType() == FTy.getParamType(0));
1450
1451   case LibFunc_strnlen:
1452     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(1) &&
1453             FTy.getParamType(0) == PCharTy &&
1454             FTy.getParamType(1) == SizeTTy);
1455
1456   case LibFunc_posix_memalign:
1457     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1458             FTy.getParamType(0)->isPointerTy() &&
1459             FTy.getParamType(1) == SizeTTy && FTy.getParamType(2) == SizeTTy);
1460
1461   case LibFunc_wcslen:
1462     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
1463             FTy.getReturnType()->isIntegerTy());
1464
1465   case LibFunc_cabs:
1466   case LibFunc_cabsf:
1467   case LibFunc_cabsl: {
1468     Type* RetTy = FTy.getReturnType();
1469     if (!RetTy->isFloatingPointTy())
1470       return false;
1471
1472     // NOTE: These prototypes are target specific and currently support
1473     // "complex" passed as an array or discrete real & imaginary parameters.
1474     // Add other calling conventions to enable libcall optimizations.
1475     if (NumParams == 1)
1476       return (FTy.getParamType(0)->isArrayTy() &&
1477               FTy.getParamType(0)->getArrayNumElements() == 2 &&
1478               FTy.getParamType(0)->getArrayElementType() == RetTy);
1479     else if (NumParams == 2)
1480       return (FTy.getParamType(0) == RetTy && FTy.getParamType(1) == RetTy);
1481     else
1482       return false;
1483   }
1484   case LibFunc::NumLibFuncs:
1485     break;
1486   }
1487
1488   llvm_unreachable("Invalid libfunc");
1489 }
1490
1491 bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl,
1492                                        LibFunc &F) const {
1493   // Intrinsics don't overlap w/libcalls; if our module has a large number of
1494   // intrinsics, this ends up being an interesting compile time win since we
1495   // avoid string normalization and comparison.
1496   if (FDecl.isIntrinsic()) return false;
1497
1498   const DataLayout *DL =
1499       FDecl.getParent() ? &FDecl.getParent()->getDataLayout() : nullptr;
1500   return getLibFunc(FDecl.getName(), F) &&
1501          isValidProtoForLibFunc(*FDecl.getFunctionType(), F, DL);
1502 }
1503
1504 void TargetLibraryInfoImpl::disableAllFunctions() {
1505   memset(AvailableArray, 0, sizeof(AvailableArray));
1506 }
1507
1508 static bool compareByScalarFnName(const VecDesc &LHS, const VecDesc &RHS) {
1509   return LHS.ScalarFnName < RHS.ScalarFnName;
1510 }
1511
1512 static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) {
1513   return LHS.VectorFnName < RHS.VectorFnName;
1514 }
1515
1516 static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) {
1517   return LHS.ScalarFnName < S;
1518 }
1519
1520 static bool compareWithVectorFnName(const VecDesc &LHS, StringRef S) {
1521   return LHS.VectorFnName < S;
1522 }
1523
1524 void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) {
1525   VectorDescs.insert(VectorDescs.end(), Fns.begin(), Fns.end());
1526   llvm::sort(VectorDescs, compareByScalarFnName);
1527
1528   ScalarDescs.insert(ScalarDescs.end(), Fns.begin(), Fns.end());
1529   llvm::sort(ScalarDescs, compareByVectorFnName);
1530 }
1531
1532 void TargetLibraryInfoImpl::addVectorizableFunctionsFromVecLib(
1533     enum VectorLibrary VecLib) {
1534   switch (VecLib) {
1535   case Accelerate: {
1536     const VecDesc VecFuncs[] = {
1537     #define TLI_DEFINE_ACCELERATE_VECFUNCS
1538     #include "llvm/Analysis/VecFuncs.def"
1539     };
1540     addVectorizableFunctions(VecFuncs);
1541     break;
1542   }
1543   case MASSV: {
1544     const VecDesc VecFuncs[] = {
1545     #define TLI_DEFINE_MASSV_VECFUNCS
1546     #include "llvm/Analysis/VecFuncs.def"
1547     };
1548     addVectorizableFunctions(VecFuncs);
1549     break;
1550   }
1551   case SVML: {
1552     const VecDesc VecFuncs[] = {
1553     #define TLI_DEFINE_SVML_VECFUNCS
1554     #include "llvm/Analysis/VecFuncs.def"
1555     };
1556     addVectorizableFunctions(VecFuncs);
1557     break;
1558   }
1559   case NoLibrary:
1560     break;
1561   }
1562 }
1563
1564 bool TargetLibraryInfoImpl::isFunctionVectorizable(StringRef funcName) const {
1565   funcName = sanitizeFunctionName(funcName);
1566   if (funcName.empty())
1567     return false;
1568
1569   std::vector<VecDesc>::const_iterator I =
1570       llvm::lower_bound(VectorDescs, funcName, compareWithScalarFnName);
1571   return I != VectorDescs.end() && StringRef(I->ScalarFnName) == funcName;
1572 }
1573
1574 StringRef TargetLibraryInfoImpl::getVectorizedFunction(StringRef F,
1575                                                        unsigned VF) const {
1576   F = sanitizeFunctionName(F);
1577   if (F.empty())
1578     return F;
1579   std::vector<VecDesc>::const_iterator I =
1580       llvm::lower_bound(VectorDescs, F, compareWithScalarFnName);
1581   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == F) {
1582     if (I->VectorizationFactor == VF)
1583       return I->VectorFnName;
1584     ++I;
1585   }
1586   return StringRef();
1587 }
1588
1589 StringRef TargetLibraryInfoImpl::getScalarizedFunction(StringRef F,
1590                                                        unsigned &VF) const {
1591   F = sanitizeFunctionName(F);
1592   if (F.empty())
1593     return F;
1594
1595   std::vector<VecDesc>::const_iterator I =
1596       llvm::lower_bound(ScalarDescs, F, compareWithVectorFnName);
1597   if (I == VectorDescs.end() || StringRef(I->VectorFnName) != F)
1598     return StringRef();
1599   VF = I->VectorizationFactor;
1600   return I->ScalarFnName;
1601 }
1602
1603 TargetLibraryInfo TargetLibraryAnalysis::run(Module &M,
1604                                              ModuleAnalysisManager &) {
1605   if (PresetInfoImpl)
1606     return TargetLibraryInfo(*PresetInfoImpl);
1607
1608   return TargetLibraryInfo(lookupInfoImpl(Triple(M.getTargetTriple())));
1609 }
1610
1611 TargetLibraryInfo TargetLibraryAnalysis::run(Function &F,
1612                                              FunctionAnalysisManager &) {
1613   if (PresetInfoImpl)
1614     return TargetLibraryInfo(*PresetInfoImpl);
1615
1616   return TargetLibraryInfo(
1617       lookupInfoImpl(Triple(F.getParent()->getTargetTriple())));
1618 }
1619
1620 TargetLibraryInfoImpl &TargetLibraryAnalysis::lookupInfoImpl(const Triple &T) {
1621   std::unique_ptr<TargetLibraryInfoImpl> &Impl =
1622       Impls[T.normalize()];
1623   if (!Impl)
1624     Impl.reset(new TargetLibraryInfoImpl(T));
1625
1626   return *Impl;
1627 }
1628
1629 unsigned TargetLibraryInfoImpl::getWCharSize(const Module &M) const {
1630   if (auto *ShortWChar = cast_or_null<ConstantAsMetadata>(
1631       M.getModuleFlag("wchar_size")))
1632     return cast<ConstantInt>(ShortWChar->getValue())->getZExtValue();
1633   return 0;
1634 }
1635
1636 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass()
1637     : ImmutablePass(ID), TLIImpl(), TLI(TLIImpl) {
1638   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1639 }
1640
1641 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T)
1642     : ImmutablePass(ID), TLIImpl(T), TLI(TLIImpl) {
1643   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1644 }
1645
1646 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(
1647     const TargetLibraryInfoImpl &TLIImpl)
1648     : ImmutablePass(ID), TLIImpl(TLIImpl), TLI(this->TLIImpl) {
1649   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1650 }
1651
1652 AnalysisKey TargetLibraryAnalysis::Key;
1653
1654 // Register the basic pass.
1655 INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo",
1656                 "Target Library Information", false, true)
1657 char TargetLibraryInfoWrapperPass::ID = 0;
1658
1659 void TargetLibraryInfoWrapperPass::anchor() {}