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