xref: /freebsd/contrib/llvm-project/llvm/lib/Analysis/TargetLibraryInfo.cpp (revision 681ce946f33e75c590e97c53076e86dff1fe8f4a) 
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/InitializePasses.h"
17  #include "llvm/Support/CommandLine.h"
18  using namespace llvm;
19  
20  static cl::opt<TargetLibraryInfoImpl::VectorLibrary> ClVectorLibrary(
21      "vector-library", cl::Hidden, cl::desc("Vector functions library"),
22      cl::init(TargetLibraryInfoImpl::NoLibrary),
23      cl::values(clEnumValN(TargetLibraryInfoImpl::NoLibrary, "none",
24                            "No vector functions library"),
25                 clEnumValN(TargetLibraryInfoImpl::Accelerate, "Accelerate",
26                            "Accelerate framework"),
27                 clEnumValN(TargetLibraryInfoImpl::DarwinLibSystemM,
28                            "Darwin_libsystem_m", "Darwin libsystem_m"),
29                 clEnumValN(TargetLibraryInfoImpl::LIBMVEC_X86, "LIBMVEC-X86",
30                            "GLIBC Vector Math library"),
31                 clEnumValN(TargetLibraryInfoImpl::MASSV, "MASSV",
32                            "IBM MASS vector library"),
33                 clEnumValN(TargetLibraryInfoImpl::SVML, "SVML",
34                            "Intel SVML library")));
35  
36  StringLiteral const TargetLibraryInfoImpl::StandardNames[LibFunc::NumLibFuncs] =
37      {
38  #define TLI_DEFINE_STRING
39  #include "llvm/Analysis/TargetLibraryInfo.def"
40  };
41  
42  static bool hasSinCosPiStret(const Triple &T) {
43    // Only Darwin variants have _stret versions of combined trig functions.
44    if (!T.isOSDarwin())
45      return false;
46  
47    // The ABI is rather complicated on x86, so don't do anything special there.
48    if (T.getArch() == Triple::x86)
49      return false;
50  
51    if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
52      return false;
53  
54    if (T.isiOS() && T.isOSVersionLT(7, 0))
55      return false;
56  
57    return true;
58  }
59  
60  static bool hasBcmp(const Triple &TT) {
61    // Posix removed support from bcmp() in 2001, but the glibc and several
62    // implementations of the libc still have it.
63    if (TT.isOSLinux())
64      return TT.isGNUEnvironment() || TT.isMusl();
65    // Both NetBSD and OpenBSD are planning to remove the function. Windows does
66    // not have it.
67    return TT.isOSFreeBSD() || TT.isOSSolaris();
68  }
69  
70  static bool isCallingConvCCompatible(CallingConv::ID CC, StringRef TT,
71                                       FunctionType *FuncTy) {
72    switch (CC) {
73    default:
74      return false;
75    case llvm::CallingConv::C:
76      return true;
77    case llvm::CallingConv::ARM_APCS:
78    case llvm::CallingConv::ARM_AAPCS:
79    case llvm::CallingConv::ARM_AAPCS_VFP: {
80  
81      // The iOS ABI diverges from the standard in some cases, so for now don't
82      // try to simplify those calls.
83      if (Triple(TT).isiOS())
84        return false;
85  
86      if (!FuncTy->getReturnType()->isPointerTy() &&
87          !FuncTy->getReturnType()->isIntegerTy() &&
88          !FuncTy->getReturnType()->isVoidTy())
89        return false;
90  
91      for (auto *Param : FuncTy->params()) {
92        if (!Param->isPointerTy() && !Param->isIntegerTy())
93          return false;
94      }
95      return true;
96    }
97    }
98    return false;
99  }
100  
101  bool TargetLibraryInfoImpl::isCallingConvCCompatible(CallBase *CI) {
102    return ::isCallingConvCCompatible(CI->getCallingConv(),
103                                      CI->getModule()->getTargetTriple(),
104                                      CI->getFunctionType());
105  }
106  
107  bool TargetLibraryInfoImpl::isCallingConvCCompatible(Function *F) {
108    return ::isCallingConvCCompatible(F->getCallingConv(),
109                                      F->getParent()->getTargetTriple(),
110                                      F->getFunctionType());
111  }
112  
113  /// Initialize the set of available library functions based on the specified
114  /// target triple. This should be carefully written so that a missing target
115  /// triple gets a sane set of defaults.
116  static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
117                         ArrayRef<StringLiteral> StandardNames) {
118    // Verify that the StandardNames array is in alphabetical order.
119    assert(
120        llvm::is_sorted(StandardNames,
121                        [](StringRef LHS, StringRef RHS) { return LHS < RHS; }) &&
122        "TargetLibraryInfoImpl function names must be sorted");
123  
124    // Set IO unlocked variants as unavailable
125    // Set them as available per system below
126    TLI.setUnavailable(LibFunc_getchar_unlocked);
127    TLI.setUnavailable(LibFunc_putc_unlocked);
128    TLI.setUnavailable(LibFunc_putchar_unlocked);
129    TLI.setUnavailable(LibFunc_fputc_unlocked);
130    TLI.setUnavailable(LibFunc_fgetc_unlocked);
131    TLI.setUnavailable(LibFunc_fread_unlocked);
132    TLI.setUnavailable(LibFunc_fwrite_unlocked);
133    TLI.setUnavailable(LibFunc_fputs_unlocked);
134    TLI.setUnavailable(LibFunc_fgets_unlocked);
135  
136    bool ShouldExtI32Param = false, ShouldExtI32Return = false,
137         ShouldSignExtI32Param = false;
138    // PowerPC64, Sparc64, SystemZ need signext/zeroext on i32 parameters and
139    // returns corresponding to C-level ints and unsigned ints.
140    if (T.isPPC64() || T.getArch() == Triple::sparcv9 ||
141        T.getArch() == Triple::systemz) {
142      ShouldExtI32Param = true;
143      ShouldExtI32Return = true;
144    }
145    // Mips, on the other hand, needs signext on i32 parameters corresponding
146    // to both signed and unsigned ints.
147    if (T.isMIPS()) {
148      ShouldSignExtI32Param = true;
149    }
150    TLI.setShouldExtI32Param(ShouldExtI32Param);
151    TLI.setShouldExtI32Return(ShouldExtI32Return);
152    TLI.setShouldSignExtI32Param(ShouldSignExtI32Param);
153  
154    // Let's assume by default that the size of int is 32 bits, unless the target
155    // is a 16-bit architecture because then it most likely is 16 bits. If that
156    // isn't true for a target those defaults should be overridden below.
157    TLI.setIntSize(T.isArch16Bit() ? 16 : 32);
158  
159    if (T.isAMDGPU())
160      TLI.disableAllFunctions();
161  
162    // There are no library implementations of memcpy and memset for AMD gpus and
163    // these can be difficult to lower in the backend.
164    if (T.isAMDGPU()) {
165      TLI.setUnavailable(LibFunc_memcpy);
166      TLI.setUnavailable(LibFunc_memset);
167      TLI.setUnavailable(LibFunc_memset_pattern16);
168      TLI.setAvailable(llvm::LibFunc___kmpc_alloc_shared);
169      TLI.setAvailable(llvm::LibFunc___kmpc_free_shared);
170      return;
171    }
172  
173    // memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
174    // All versions of watchOS support it.
175    if (T.isMacOSX()) {
176      // available IO unlocked variants on Mac OS X
177      TLI.setAvailable(LibFunc_getc_unlocked);
178      TLI.setAvailable(LibFunc_getchar_unlocked);
179      TLI.setAvailable(LibFunc_putc_unlocked);
180      TLI.setAvailable(LibFunc_putchar_unlocked);
181  
182      if (T.isMacOSXVersionLT(10, 5))
183        TLI.setUnavailable(LibFunc_memset_pattern16);
184    } else if (T.isiOS()) {
185      if (T.isOSVersionLT(3, 0))
186        TLI.setUnavailable(LibFunc_memset_pattern16);
187    } else if (!T.isWatchOS()) {
188      TLI.setUnavailable(LibFunc_memset_pattern16);
189    }
190  
191    if (!hasSinCosPiStret(T)) {
192      TLI.setUnavailable(LibFunc_sinpi);
193      TLI.setUnavailable(LibFunc_sinpif);
194      TLI.setUnavailable(LibFunc_cospi);
195      TLI.setUnavailable(LibFunc_cospif);
196      TLI.setUnavailable(LibFunc_sincospi_stret);
197      TLI.setUnavailable(LibFunc_sincospif_stret);
198    }
199  
200    if (!hasBcmp(T))
201      TLI.setUnavailable(LibFunc_bcmp);
202  
203    if (T.isMacOSX() && T.getArch() == Triple::x86 &&
204        !T.isMacOSXVersionLT(10, 7)) {
205      // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
206      // we don't care about) have two versions; on recent OSX, the one we want
207      // has a $UNIX2003 suffix. The two implementations are identical except
208      // for the return value in some edge cases.  However, we don't want to
209      // generate code that depends on the old symbols.
210      TLI.setAvailableWithName(LibFunc_fwrite, "fwrite$UNIX2003");
211      TLI.setAvailableWithName(LibFunc_fputs, "fputs$UNIX2003");
212    }
213  
214    // iprintf and friends are only available on XCore, TCE, and Emscripten.
215    if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce &&
216        T.getOS() != Triple::Emscripten) {
217      TLI.setUnavailable(LibFunc_iprintf);
218      TLI.setUnavailable(LibFunc_siprintf);
219      TLI.setUnavailable(LibFunc_fiprintf);
220    }
221  
222    // __small_printf and friends are only available on Emscripten.
223    if (T.getOS() != Triple::Emscripten) {
224      TLI.setUnavailable(LibFunc_small_printf);
225      TLI.setUnavailable(LibFunc_small_sprintf);
226      TLI.setUnavailable(LibFunc_small_fprintf);
227    }
228  
229    if (T.isOSWindows() && !T.isOSCygMing()) {
230      // XXX: The earliest documentation available at the moment is for VS2015/VC19:
231      // https://docs.microsoft.com/en-us/cpp/c-runtime-library/floating-point-support?view=vs-2015
232      // XXX: In order to use an MSVCRT older than VC19,
233      // the specific library version must be explicit in the target triple,
234      // e.g., x86_64-pc-windows-msvc18.
235      bool hasPartialC99 = true;
236      if (T.isKnownWindowsMSVCEnvironment()) {
237        unsigned Major, Minor, Micro;
238        T.getEnvironmentVersion(Major, Minor, Micro);
239        hasPartialC99 = (Major == 0 || Major >= 19);
240      }
241  
242      // Latest targets support C89 math functions, in part.
243      bool isARM = (T.getArch() == Triple::aarch64 ||
244                    T.getArch() == Triple::arm);
245      bool hasPartialFloat = (isARM ||
246                              T.getArch() == Triple::x86_64);
247  
248      // Win32 does not support float C89 math functions, in general.
249      if (!hasPartialFloat) {
250        TLI.setUnavailable(LibFunc_acosf);
251        TLI.setUnavailable(LibFunc_asinf);
252        TLI.setUnavailable(LibFunc_atan2f);
253        TLI.setUnavailable(LibFunc_atanf);
254        TLI.setUnavailable(LibFunc_ceilf);
255        TLI.setUnavailable(LibFunc_cosf);
256        TLI.setUnavailable(LibFunc_coshf);
257        TLI.setUnavailable(LibFunc_expf);
258        TLI.setUnavailable(LibFunc_floorf);
259        TLI.setUnavailable(LibFunc_fmodf);
260        TLI.setUnavailable(LibFunc_log10f);
261        TLI.setUnavailable(LibFunc_logf);
262        TLI.setUnavailable(LibFunc_modff);
263        TLI.setUnavailable(LibFunc_powf);
264        TLI.setUnavailable(LibFunc_remainderf);
265        TLI.setUnavailable(LibFunc_sinf);
266        TLI.setUnavailable(LibFunc_sinhf);
267        TLI.setUnavailable(LibFunc_sqrtf);
268        TLI.setUnavailable(LibFunc_tanf);
269        TLI.setUnavailable(LibFunc_tanhf);
270      }
271      if (!isARM)
272        TLI.setUnavailable(LibFunc_fabsf);
273      TLI.setUnavailable(LibFunc_frexpf);
274      TLI.setUnavailable(LibFunc_ldexpf);
275  
276      // Win32 does not support long double C89 math functions.
277      TLI.setUnavailable(LibFunc_acosl);
278      TLI.setUnavailable(LibFunc_asinl);
279      TLI.setUnavailable(LibFunc_atan2l);
280      TLI.setUnavailable(LibFunc_atanl);
281      TLI.setUnavailable(LibFunc_ceill);
282      TLI.setUnavailable(LibFunc_cosl);
283      TLI.setUnavailable(LibFunc_coshl);
284      TLI.setUnavailable(LibFunc_expl);
285      TLI.setUnavailable(LibFunc_fabsl);
286      TLI.setUnavailable(LibFunc_floorl);
287      TLI.setUnavailable(LibFunc_fmodl);
288      TLI.setUnavailable(LibFunc_frexpl);
289      TLI.setUnavailable(LibFunc_ldexpl);
290      TLI.setUnavailable(LibFunc_log10l);
291      TLI.setUnavailable(LibFunc_logl);
292      TLI.setUnavailable(LibFunc_modfl);
293      TLI.setUnavailable(LibFunc_powl);
294      TLI.setUnavailable(LibFunc_remainderl);
295      TLI.setUnavailable(LibFunc_sinl);
296      TLI.setUnavailable(LibFunc_sinhl);
297      TLI.setUnavailable(LibFunc_sqrtl);
298      TLI.setUnavailable(LibFunc_tanl);
299      TLI.setUnavailable(LibFunc_tanhl);
300  
301      // Win32 does not fully support C99 math functions.
302      if (!hasPartialC99) {
303        TLI.setUnavailable(LibFunc_acosh);
304        TLI.setUnavailable(LibFunc_acoshf);
305        TLI.setUnavailable(LibFunc_asinh);
306        TLI.setUnavailable(LibFunc_asinhf);
307        TLI.setUnavailable(LibFunc_atanh);
308        TLI.setUnavailable(LibFunc_atanhf);
309        TLI.setAvailableWithName(LibFunc_cabs, "_cabs");
310        TLI.setUnavailable(LibFunc_cabsf);
311        TLI.setUnavailable(LibFunc_cbrt);
312        TLI.setUnavailable(LibFunc_cbrtf);
313        TLI.setAvailableWithName(LibFunc_copysign, "_copysign");
314        TLI.setAvailableWithName(LibFunc_copysignf, "_copysignf");
315        TLI.setUnavailable(LibFunc_exp2);
316        TLI.setUnavailable(LibFunc_exp2f);
317        TLI.setUnavailable(LibFunc_expm1);
318        TLI.setUnavailable(LibFunc_expm1f);
319        TLI.setUnavailable(LibFunc_fmax);
320        TLI.setUnavailable(LibFunc_fmaxf);
321        TLI.setUnavailable(LibFunc_fmin);
322        TLI.setUnavailable(LibFunc_fminf);
323        TLI.setUnavailable(LibFunc_log1p);
324        TLI.setUnavailable(LibFunc_log1pf);
325        TLI.setUnavailable(LibFunc_log2);
326        TLI.setUnavailable(LibFunc_log2f);
327        TLI.setAvailableWithName(LibFunc_logb, "_logb");
328        if (hasPartialFloat)
329          TLI.setAvailableWithName(LibFunc_logbf, "_logbf");
330        else
331          TLI.setUnavailable(LibFunc_logbf);
332        TLI.setUnavailable(LibFunc_rint);
333        TLI.setUnavailable(LibFunc_rintf);
334        TLI.setUnavailable(LibFunc_round);
335        TLI.setUnavailable(LibFunc_roundf);
336        TLI.setUnavailable(LibFunc_trunc);
337        TLI.setUnavailable(LibFunc_truncf);
338      }
339  
340      // Win32 does not support long double C99 math functions.
341      TLI.setUnavailable(LibFunc_acoshl);
342      TLI.setUnavailable(LibFunc_asinhl);
343      TLI.setUnavailable(LibFunc_atanhl);
344      TLI.setUnavailable(LibFunc_cabsl);
345      TLI.setUnavailable(LibFunc_cbrtl);
346      TLI.setUnavailable(LibFunc_copysignl);
347      TLI.setUnavailable(LibFunc_exp2l);
348      TLI.setUnavailable(LibFunc_expm1l);
349      TLI.setUnavailable(LibFunc_fmaxl);
350      TLI.setUnavailable(LibFunc_fminl);
351      TLI.setUnavailable(LibFunc_log1pl);
352      TLI.setUnavailable(LibFunc_log2l);
353      TLI.setUnavailable(LibFunc_logbl);
354      TLI.setUnavailable(LibFunc_nearbyintl);
355      TLI.setUnavailable(LibFunc_rintl);
356      TLI.setUnavailable(LibFunc_roundl);
357      TLI.setUnavailable(LibFunc_truncl);
358  
359      // Win32 does not support these functions, but
360      // they are generally available on POSIX-compliant systems.
361      TLI.setUnavailable(LibFunc_access);
362      TLI.setUnavailable(LibFunc_chmod);
363      TLI.setUnavailable(LibFunc_closedir);
364      TLI.setUnavailable(LibFunc_fdopen);
365      TLI.setUnavailable(LibFunc_fileno);
366      TLI.setUnavailable(LibFunc_fseeko);
367      TLI.setUnavailable(LibFunc_fstat);
368      TLI.setUnavailable(LibFunc_ftello);
369      TLI.setUnavailable(LibFunc_gettimeofday);
370      TLI.setUnavailable(LibFunc_memccpy);
371      TLI.setUnavailable(LibFunc_mkdir);
372      TLI.setUnavailable(LibFunc_open);
373      TLI.setUnavailable(LibFunc_opendir);
374      TLI.setUnavailable(LibFunc_pclose);
375      TLI.setUnavailable(LibFunc_popen);
376      TLI.setUnavailable(LibFunc_read);
377      TLI.setUnavailable(LibFunc_rmdir);
378      TLI.setUnavailable(LibFunc_stat);
379      TLI.setUnavailable(LibFunc_strcasecmp);
380      TLI.setUnavailable(LibFunc_strncasecmp);
381      TLI.setUnavailable(LibFunc_unlink);
382      TLI.setUnavailable(LibFunc_utime);
383      TLI.setUnavailable(LibFunc_write);
384    }
385  
386    if (T.isOSWindows() && !T.isWindowsCygwinEnvironment()) {
387      // These functions aren't available in either MSVC or MinGW environments.
388      TLI.setUnavailable(LibFunc_bcmp);
389      TLI.setUnavailable(LibFunc_bcopy);
390      TLI.setUnavailable(LibFunc_bzero);
391      TLI.setUnavailable(LibFunc_chown);
392      TLI.setUnavailable(LibFunc_ctermid);
393      TLI.setUnavailable(LibFunc_ffs);
394      TLI.setUnavailable(LibFunc_flockfile);
395      TLI.setUnavailable(LibFunc_fstatvfs);
396      TLI.setUnavailable(LibFunc_ftrylockfile);
397      TLI.setUnavailable(LibFunc_funlockfile);
398      TLI.setUnavailable(LibFunc_getitimer);
399      TLI.setUnavailable(LibFunc_getlogin_r);
400      TLI.setUnavailable(LibFunc_getpwnam);
401      TLI.setUnavailable(LibFunc_htonl);
402      TLI.setUnavailable(LibFunc_htons);
403      TLI.setUnavailable(LibFunc_lchown);
404      TLI.setUnavailable(LibFunc_lstat);
405      TLI.setUnavailable(LibFunc_ntohl);
406      TLI.setUnavailable(LibFunc_ntohs);
407      TLI.setUnavailable(LibFunc_pread);
408      TLI.setUnavailable(LibFunc_pwrite);
409      TLI.setUnavailable(LibFunc_readlink);
410      TLI.setUnavailable(LibFunc_realpath);
411      TLI.setUnavailable(LibFunc_setitimer);
412      TLI.setUnavailable(LibFunc_statvfs);
413      TLI.setUnavailable(LibFunc_stpcpy);
414      TLI.setUnavailable(LibFunc_stpncpy);
415      TLI.setUnavailable(LibFunc_times);
416      TLI.setUnavailable(LibFunc_uname);
417      TLI.setUnavailable(LibFunc_unsetenv);
418      TLI.setUnavailable(LibFunc_utimes);
419    }
420  
421    switch (T.getOS()) {
422    case Triple::MacOSX:
423      // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0
424      // and their names are __exp10 and __exp10f. exp10l is not available on
425      // OS X or iOS.
426      TLI.setUnavailable(LibFunc_exp10l);
427      if (T.isMacOSXVersionLT(10, 9)) {
428        TLI.setUnavailable(LibFunc_exp10);
429        TLI.setUnavailable(LibFunc_exp10f);
430      } else {
431        TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
432        TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
433      }
434      break;
435    case Triple::IOS:
436    case Triple::TvOS:
437    case Triple::WatchOS:
438      TLI.setUnavailable(LibFunc_exp10l);
439      if (!T.isWatchOS() &&
440          (T.isOSVersionLT(7, 0) || (T.isOSVersionLT(9, 0) && T.isX86()))) {
441        TLI.setUnavailable(LibFunc_exp10);
442        TLI.setUnavailable(LibFunc_exp10f);
443      } else {
444        TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
445        TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
446      }
447      break;
448    case Triple::Linux:
449      // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
450      // buggy prior to glibc version 2.18. Until this version is widely deployed
451      // or we have a reasonable detection strategy, we cannot use exp10 reliably
452      // on Linux.
453      //
454      // Fall through to disable all of them.
455      LLVM_FALLTHROUGH;
456    default:
457      TLI.setUnavailable(LibFunc_exp10);
458      TLI.setUnavailable(LibFunc_exp10f);
459      TLI.setUnavailable(LibFunc_exp10l);
460    }
461  
462    // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
463    // Linux (GLIBC):
464    // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
465    // http://svn.freebsd.org/base/head/lib/libc/string/ffsl.c
466    // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
467    switch (T.getOS()) {
468    case Triple::Darwin:
469    case Triple::MacOSX:
470    case Triple::IOS:
471    case Triple::TvOS:
472    case Triple::WatchOS:
473    case Triple::FreeBSD:
474    case Triple::Linux:
475      break;
476    default:
477      TLI.setUnavailable(LibFunc_ffsl);
478    }
479  
480    // ffsll is available on at least FreeBSD and Linux (GLIBC):
481    // http://svn.freebsd.org/base/head/lib/libc/string/ffsll.c
482    // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
483    switch (T.getOS()) {
484    case Triple::Darwin:
485    case Triple::MacOSX:
486    case Triple::IOS:
487    case Triple::TvOS:
488    case Triple::WatchOS:
489    case Triple::FreeBSD:
490    case Triple::Linux:
491      break;
492    default:
493      TLI.setUnavailable(LibFunc_ffsll);
494    }
495  
496    // The following functions are available on at least FreeBSD:
497    // http://svn.freebsd.org/base/head/lib/libc/string/fls.c
498    // http://svn.freebsd.org/base/head/lib/libc/string/flsl.c
499    // http://svn.freebsd.org/base/head/lib/libc/string/flsll.c
500    if (!T.isOSFreeBSD()) {
501      TLI.setUnavailable(LibFunc_fls);
502      TLI.setUnavailable(LibFunc_flsl);
503      TLI.setUnavailable(LibFunc_flsll);
504    }
505  
506    // The following functions are only available on GNU/Linux (using glibc).
507    // Linux variants without glibc (eg: bionic, musl) may have some subset.
508    if (!T.isOSLinux() || !T.isGNUEnvironment()) {
509      TLI.setUnavailable(LibFunc_dunder_strdup);
510      TLI.setUnavailable(LibFunc_dunder_strtok_r);
511      TLI.setUnavailable(LibFunc_dunder_isoc99_scanf);
512      TLI.setUnavailable(LibFunc_dunder_isoc99_sscanf);
513      TLI.setUnavailable(LibFunc_under_IO_getc);
514      TLI.setUnavailable(LibFunc_under_IO_putc);
515      // But, Android and musl have memalign.
516      if (!T.isAndroid() && !T.isMusl())
517        TLI.setUnavailable(LibFunc_memalign);
518      TLI.setUnavailable(LibFunc_fopen64);
519      TLI.setUnavailable(LibFunc_fseeko64);
520      TLI.setUnavailable(LibFunc_fstat64);
521      TLI.setUnavailable(LibFunc_fstatvfs64);
522      TLI.setUnavailable(LibFunc_ftello64);
523      TLI.setUnavailable(LibFunc_lstat64);
524      TLI.setUnavailable(LibFunc_open64);
525      TLI.setUnavailable(LibFunc_stat64);
526      TLI.setUnavailable(LibFunc_statvfs64);
527      TLI.setUnavailable(LibFunc_tmpfile64);
528  
529      // Relaxed math functions are included in math-finite.h on Linux (GLIBC).
530      // Note that math-finite.h is no longer supported by top-of-tree GLIBC,
531      // so we keep these functions around just so that they're recognized by
532      // the ConstantFolder.
533      TLI.setUnavailable(LibFunc_acos_finite);
534      TLI.setUnavailable(LibFunc_acosf_finite);
535      TLI.setUnavailable(LibFunc_acosl_finite);
536      TLI.setUnavailable(LibFunc_acosh_finite);
537      TLI.setUnavailable(LibFunc_acoshf_finite);
538      TLI.setUnavailable(LibFunc_acoshl_finite);
539      TLI.setUnavailable(LibFunc_asin_finite);
540      TLI.setUnavailable(LibFunc_asinf_finite);
541      TLI.setUnavailable(LibFunc_asinl_finite);
542      TLI.setUnavailable(LibFunc_atan2_finite);
543      TLI.setUnavailable(LibFunc_atan2f_finite);
544      TLI.setUnavailable(LibFunc_atan2l_finite);
545      TLI.setUnavailable(LibFunc_atanh_finite);
546      TLI.setUnavailable(LibFunc_atanhf_finite);
547      TLI.setUnavailable(LibFunc_atanhl_finite);
548      TLI.setUnavailable(LibFunc_cosh_finite);
549      TLI.setUnavailable(LibFunc_coshf_finite);
550      TLI.setUnavailable(LibFunc_coshl_finite);
551      TLI.setUnavailable(LibFunc_exp10_finite);
552      TLI.setUnavailable(LibFunc_exp10f_finite);
553      TLI.setUnavailable(LibFunc_exp10l_finite);
554      TLI.setUnavailable(LibFunc_exp2_finite);
555      TLI.setUnavailable(LibFunc_exp2f_finite);
556      TLI.setUnavailable(LibFunc_exp2l_finite);
557      TLI.setUnavailable(LibFunc_exp_finite);
558      TLI.setUnavailable(LibFunc_expf_finite);
559      TLI.setUnavailable(LibFunc_expl_finite);
560      TLI.setUnavailable(LibFunc_log10_finite);
561      TLI.setUnavailable(LibFunc_log10f_finite);
562      TLI.setUnavailable(LibFunc_log10l_finite);
563      TLI.setUnavailable(LibFunc_log2_finite);
564      TLI.setUnavailable(LibFunc_log2f_finite);
565      TLI.setUnavailable(LibFunc_log2l_finite);
566      TLI.setUnavailable(LibFunc_log_finite);
567      TLI.setUnavailable(LibFunc_logf_finite);
568      TLI.setUnavailable(LibFunc_logl_finite);
569      TLI.setUnavailable(LibFunc_pow_finite);
570      TLI.setUnavailable(LibFunc_powf_finite);
571      TLI.setUnavailable(LibFunc_powl_finite);
572      TLI.setUnavailable(LibFunc_sinh_finite);
573      TLI.setUnavailable(LibFunc_sinhf_finite);
574      TLI.setUnavailable(LibFunc_sinhl_finite);
575    }
576  
577    if ((T.isOSLinux() && T.isGNUEnvironment()) ||
578        (T.isAndroid() && !T.isAndroidVersionLT(28))) {
579      // available IO unlocked variants on GNU/Linux and Android P or later
580      TLI.setAvailable(LibFunc_getc_unlocked);
581      TLI.setAvailable(LibFunc_getchar_unlocked);
582      TLI.setAvailable(LibFunc_putc_unlocked);
583      TLI.setAvailable(LibFunc_putchar_unlocked);
584      TLI.setAvailable(LibFunc_fputc_unlocked);
585      TLI.setAvailable(LibFunc_fgetc_unlocked);
586      TLI.setAvailable(LibFunc_fread_unlocked);
587      TLI.setAvailable(LibFunc_fwrite_unlocked);
588      TLI.setAvailable(LibFunc_fputs_unlocked);
589      TLI.setAvailable(LibFunc_fgets_unlocked);
590    }
591  
592    // As currently implemented in clang, NVPTX code has no standard library to
593    // speak of.  Headers provide a standard-ish library implementation, but many
594    // of the signatures are wrong -- for example, many libm functions are not
595    // extern "C".
596    //
597    // libdevice, an IR library provided by nvidia, is linked in by the front-end,
598    // but only used functions are provided to llvm.  Moreover, most of the
599    // functions in libdevice don't map precisely to standard library functions.
600    //
601    // FIXME: Having no standard library prevents e.g. many fastmath
602    // optimizations, so this situation should be fixed.
603    if (T.isNVPTX()) {
604      TLI.disableAllFunctions();
605      TLI.setAvailable(LibFunc_nvvm_reflect);
606      TLI.setAvailable(llvm::LibFunc_malloc);
607      TLI.setAvailable(llvm::LibFunc_free);
608  
609      // TODO: We could enable the following two according to [0] but we haven't
610      //       done an evaluation wrt. the performance implications.
611      // [0]
612      // https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#dynamic-global-memory-allocation-and-operations
613      //
614      //    TLI.setAvailable(llvm::LibFunc_memcpy);
615      //    TLI.setAvailable(llvm::LibFunc_memset);
616  
617      TLI.setAvailable(llvm::LibFunc___kmpc_alloc_shared);
618      TLI.setAvailable(llvm::LibFunc___kmpc_free_shared);
619    } else {
620      TLI.setUnavailable(LibFunc_nvvm_reflect);
621    }
622  
623    // These vec_malloc/free routines are only available on AIX.
624    if (!T.isOSAIX()) {
625      TLI.setUnavailable(LibFunc_vec_calloc);
626      TLI.setUnavailable(LibFunc_vec_malloc);
627      TLI.setUnavailable(LibFunc_vec_realloc);
628      TLI.setUnavailable(LibFunc_vec_free);
629    }
630  
631    TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
632  }
633  
634  TargetLibraryInfoImpl::TargetLibraryInfoImpl() {
635    // Default to everything being available.
636    memset(AvailableArray, -1, sizeof(AvailableArray));
637  
638    initialize(*this, Triple(), StandardNames);
639  }
640  
641  TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) {
642    // Default to everything being available.
643    memset(AvailableArray, -1, sizeof(AvailableArray));
644  
645    initialize(*this, T, StandardNames);
646  }
647  
648  TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI)
649      : CustomNames(TLI.CustomNames), ShouldExtI32Param(TLI.ShouldExtI32Param),
650        ShouldExtI32Return(TLI.ShouldExtI32Return),
651        ShouldSignExtI32Param(TLI.ShouldSignExtI32Param),
652        SizeOfInt(TLI.SizeOfInt) {
653    memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
654    VectorDescs = TLI.VectorDescs;
655    ScalarDescs = TLI.ScalarDescs;
656  }
657  
658  TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI)
659      : CustomNames(std::move(TLI.CustomNames)),
660        ShouldExtI32Param(TLI.ShouldExtI32Param),
661        ShouldExtI32Return(TLI.ShouldExtI32Return),
662        ShouldSignExtI32Param(TLI.ShouldSignExtI32Param),
663        SizeOfInt(TLI.SizeOfInt) {
664    std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
665              AvailableArray);
666    VectorDescs = TLI.VectorDescs;
667    ScalarDescs = TLI.ScalarDescs;
668  }
669  
670  TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) {
671    CustomNames = TLI.CustomNames;
672    ShouldExtI32Param = TLI.ShouldExtI32Param;
673    ShouldExtI32Return = TLI.ShouldExtI32Return;
674    ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
675    SizeOfInt = TLI.SizeOfInt;
676    memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
677    return *this;
678  }
679  
680  TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) {
681    CustomNames = std::move(TLI.CustomNames);
682    ShouldExtI32Param = TLI.ShouldExtI32Param;
683    ShouldExtI32Return = TLI.ShouldExtI32Return;
684    ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
685    SizeOfInt = TLI.SizeOfInt;
686    std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
687              AvailableArray);
688    return *this;
689  }
690  
691  static StringRef sanitizeFunctionName(StringRef funcName) {
692    // Filter out empty names and names containing null bytes, those can't be in
693    // our table.
694    if (funcName.empty() || funcName.find('\0') != StringRef::npos)
695      return StringRef();
696  
697    // Check for \01 prefix that is used to mangle __asm declarations and
698    // strip it if present.
699    return GlobalValue::dropLLVMManglingEscape(funcName);
700  }
701  
702  bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName, LibFunc &F) const {
703    funcName = sanitizeFunctionName(funcName);
704    if (funcName.empty())
705      return false;
706  
707    const auto *Start = std::begin(StandardNames);
708    const auto *End = std::end(StandardNames);
709    const auto *I = std::lower_bound(Start, End, funcName);
710    if (I != End && *I == funcName) {
711      F = (LibFunc)(I - Start);
712      return true;
713    }
714    return false;
715  }
716  
717  bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy,
718                                                     LibFunc F,
719                                                     const DataLayout *DL) const {
720    LLVMContext &Ctx = FTy.getContext();
721    Type *SizeTTy = DL ? DL->getIntPtrType(Ctx, /*AddressSpace=*/0) : nullptr;
722    auto IsSizeTTy = [SizeTTy](Type *Ty) {
723      return SizeTTy ? Ty == SizeTTy : Ty->isIntegerTy();
724    };
725    unsigned NumParams = FTy.getNumParams();
726  
727    switch (F) {
728    case LibFunc_execl:
729    case LibFunc_execlp:
730    case LibFunc_execle:
731      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
732              FTy.getParamType(1)->isPointerTy() &&
733              FTy.getReturnType()->isIntegerTy(32));
734    case LibFunc_execv:
735    case LibFunc_execvp:
736      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
737              FTy.getParamType(1)->isPointerTy() &&
738              FTy.getReturnType()->isIntegerTy(32));
739    case LibFunc_execvP:
740    case LibFunc_execvpe:
741    case LibFunc_execve:
742      return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
743              FTy.getParamType(1)->isPointerTy() &&
744              FTy.getParamType(2)->isPointerTy() &&
745              FTy.getReturnType()->isIntegerTy(32));
746    case LibFunc_strlen_chk:
747      --NumParams;
748      if (!IsSizeTTy(FTy.getParamType(NumParams)))
749        return false;
750      LLVM_FALLTHROUGH;
751    case LibFunc_strlen:
752      return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
753              FTy.getReturnType()->isIntegerTy());
754  
755    case LibFunc_strchr:
756    case LibFunc_strrchr:
757      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
758              FTy.getParamType(0) == FTy.getReturnType() &&
759              FTy.getParamType(1)->isIntegerTy());
760  
761    case LibFunc_strtol:
762    case LibFunc_strtod:
763    case LibFunc_strtof:
764    case LibFunc_strtoul:
765    case LibFunc_strtoll:
766    case LibFunc_strtold:
767    case LibFunc_strtoull:
768      return ((NumParams == 2 || NumParams == 3) &&
769              FTy.getParamType(0)->isPointerTy() &&
770              FTy.getParamType(1)->isPointerTy());
771    case LibFunc_strcat_chk:
772      --NumParams;
773      if (!IsSizeTTy(FTy.getParamType(NumParams)))
774        return false;
775      LLVM_FALLTHROUGH;
776    case LibFunc_strcat:
777      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
778              FTy.getParamType(0) == FTy.getReturnType() &&
779              FTy.getParamType(1) == FTy.getReturnType());
780  
781    case LibFunc_strncat_chk:
782      --NumParams;
783      if (!IsSizeTTy(FTy.getParamType(NumParams)))
784        return false;
785      LLVM_FALLTHROUGH;
786    case LibFunc_strncat:
787      return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
788              FTy.getParamType(0) == FTy.getReturnType() &&
789              FTy.getParamType(1) == FTy.getReturnType() &&
790              IsSizeTTy(FTy.getParamType(2)));
791  
792    case LibFunc_strcpy_chk:
793    case LibFunc_stpcpy_chk:
794      --NumParams;
795      if (!IsSizeTTy(FTy.getParamType(NumParams)))
796        return false;
797      LLVM_FALLTHROUGH;
798    case LibFunc_strcpy:
799    case LibFunc_stpcpy:
800      return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(0) &&
801              FTy.getParamType(0) == FTy.getParamType(1) &&
802              FTy.getParamType(0)->isPointerTy());
803  
804    case LibFunc_strlcat_chk:
805    case LibFunc_strlcpy_chk:
806      --NumParams;
807      if (!IsSizeTTy(FTy.getParamType(NumParams)))
808        return false;
809      LLVM_FALLTHROUGH;
810    case LibFunc_strlcat:
811    case LibFunc_strlcpy:
812      return NumParams == 3 && IsSizeTTy(FTy.getReturnType()) &&
813             FTy.getParamType(0)->isPointerTy() &&
814             FTy.getParamType(1)->isPointerTy() &&
815             IsSizeTTy(FTy.getParamType(2));
816  
817    case LibFunc_strncpy_chk:
818    case LibFunc_stpncpy_chk:
819      --NumParams;
820      if (!IsSizeTTy(FTy.getParamType(NumParams)))
821        return false;
822      LLVM_FALLTHROUGH;
823    case LibFunc_strncpy:
824    case LibFunc_stpncpy:
825      return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
826              FTy.getParamType(0) == FTy.getParamType(1) &&
827              FTy.getParamType(0)->isPointerTy() &&
828              IsSizeTTy(FTy.getParamType(2)));
829  
830    case LibFunc_strxfrm:
831      return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
832              FTy.getParamType(1)->isPointerTy());
833  
834    case LibFunc_strcmp:
835      return (NumParams == 2 && FTy.getReturnType()->isIntegerTy(32) &&
836              FTy.getParamType(0)->isPointerTy() &&
837              FTy.getParamType(0) == FTy.getParamType(1));
838  
839    case LibFunc_strncmp:
840      return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
841              FTy.getParamType(0)->isPointerTy() &&
842              FTy.getParamType(0) == FTy.getParamType(1) &&
843              IsSizeTTy(FTy.getParamType(2)));
844  
845    case LibFunc_strspn:
846    case LibFunc_strcspn:
847      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
848              FTy.getParamType(0) == FTy.getParamType(1) &&
849              FTy.getReturnType()->isIntegerTy());
850  
851    case LibFunc_strcoll:
852    case LibFunc_strcasecmp:
853    case LibFunc_strncasecmp:
854      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
855              FTy.getParamType(1)->isPointerTy());
856  
857    case LibFunc_strstr:
858      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
859              FTy.getParamType(0)->isPointerTy() &&
860              FTy.getParamType(1)->isPointerTy());
861  
862    case LibFunc_strpbrk:
863      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
864              FTy.getReturnType() == FTy.getParamType(0) &&
865              FTy.getParamType(0) == FTy.getParamType(1));
866  
867    case LibFunc_strtok:
868    case LibFunc_strtok_r:
869      return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
870    case LibFunc_scanf:
871    case LibFunc_setbuf:
872    case LibFunc_setvbuf:
873      return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
874    case LibFunc_strdup:
875    case LibFunc_strndup:
876      return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
877              FTy.getParamType(0)->isPointerTy());
878    case LibFunc_sscanf:
879    case LibFunc_stat:
880    case LibFunc_statvfs:
881    case LibFunc_siprintf:
882    case LibFunc_small_sprintf:
883    case LibFunc_sprintf:
884      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
885              FTy.getParamType(1)->isPointerTy() &&
886              FTy.getReturnType()->isIntegerTy(32));
887  
888    case LibFunc_sprintf_chk:
889      return NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
890             FTy.getParamType(1)->isIntegerTy(32) &&
891             IsSizeTTy(FTy.getParamType(2)) &&
892             FTy.getParamType(3)->isPointerTy() &&
893             FTy.getReturnType()->isIntegerTy(32);
894  
895    case LibFunc_snprintf:
896      return NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
897             IsSizeTTy(FTy.getParamType(1)) &&
898             FTy.getParamType(2)->isPointerTy() &&
899             FTy.getReturnType()->isIntegerTy(32);
900  
901    case LibFunc_snprintf_chk:
902      return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
903             IsSizeTTy(FTy.getParamType(1)) &&
904             FTy.getParamType(2)->isIntegerTy(32) &&
905             IsSizeTTy(FTy.getParamType(3)) &&
906             FTy.getParamType(4)->isPointerTy() &&
907             FTy.getReturnType()->isIntegerTy(32);
908  
909    case LibFunc_setitimer:
910      return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
911              FTy.getParamType(2)->isPointerTy());
912    case LibFunc_system:
913      return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
914    case LibFunc___kmpc_alloc_shared:
915    case LibFunc_malloc:
916    case LibFunc_vec_malloc:
917      return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
918    case LibFunc_memcmp:
919      return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
920              FTy.getParamType(0)->isPointerTy() &&
921              FTy.getParamType(1)->isPointerTy());
922  
923    case LibFunc_memchr:
924    case LibFunc_memrchr:
925      return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
926              FTy.getReturnType() == FTy.getParamType(0) &&
927              FTy.getParamType(1)->isIntegerTy(32) &&
928              IsSizeTTy(FTy.getParamType(2)));
929    case LibFunc_modf:
930    case LibFunc_modff:
931    case LibFunc_modfl:
932      return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
933  
934    case LibFunc_memcpy_chk:
935    case LibFunc_mempcpy_chk:
936    case LibFunc_memmove_chk:
937      --NumParams;
938      if (!IsSizeTTy(FTy.getParamType(NumParams)))
939        return false;
940      LLVM_FALLTHROUGH;
941    case LibFunc_memcpy:
942    case LibFunc_mempcpy:
943    case LibFunc_memmove:
944      return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
945              FTy.getParamType(0)->isPointerTy() &&
946              FTy.getParamType(1)->isPointerTy() &&
947              IsSizeTTy(FTy.getParamType(2)));
948  
949    case LibFunc_memset_chk:
950      --NumParams;
951      if (!IsSizeTTy(FTy.getParamType(NumParams)))
952        return false;
953      LLVM_FALLTHROUGH;
954    case LibFunc_memset:
955      return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
956              FTy.getParamType(0)->isPointerTy() &&
957              FTy.getParamType(1)->isIntegerTy() &&
958              IsSizeTTy(FTy.getParamType(2)));
959  
960    case LibFunc_memccpy_chk:
961        --NumParams;
962      if (!IsSizeTTy(FTy.getParamType(NumParams)))
963        return false;
964      LLVM_FALLTHROUGH;
965    case LibFunc_memccpy:
966      return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
967    case LibFunc_memalign:
968      return (FTy.getReturnType()->isPointerTy());
969    case LibFunc_realloc:
970    case LibFunc_reallocf:
971    case LibFunc_vec_realloc:
972      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
973              FTy.getParamType(0) == FTy.getReturnType() &&
974              IsSizeTTy(FTy.getParamType(1)));
975    case LibFunc_read:
976      return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
977    case LibFunc_rewind:
978    case LibFunc_rmdir:
979    case LibFunc_remove:
980    case LibFunc_realpath:
981      return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
982    case LibFunc_rename:
983      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
984              FTy.getParamType(1)->isPointerTy());
985    case LibFunc_readlink:
986      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
987              FTy.getParamType(1)->isPointerTy());
988    case LibFunc_write:
989      return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
990    case LibFunc_aligned_alloc:
991      return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
992    case LibFunc_bcopy:
993    case LibFunc_bcmp:
994      return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
995              FTy.getParamType(1)->isPointerTy());
996    case LibFunc_bzero:
997      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
998    case LibFunc_calloc:
999    case LibFunc_vec_calloc:
1000      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1001              FTy.getParamType(0) == FTy.getParamType(1));
1002  
1003    case LibFunc_atof:
1004    case LibFunc_atoi:
1005    case LibFunc_atol:
1006    case LibFunc_atoll:
1007    case LibFunc_ferror:
1008    case LibFunc_getenv:
1009    case LibFunc_getpwnam:
1010    case LibFunc_iprintf:
1011    case LibFunc_small_printf:
1012    case LibFunc_pclose:
1013    case LibFunc_perror:
1014    case LibFunc_printf:
1015    case LibFunc_puts:
1016    case LibFunc_uname:
1017    case LibFunc_under_IO_getc:
1018    case LibFunc_unlink:
1019    case LibFunc_unsetenv:
1020      return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1021  
1022    case LibFunc_access:
1023    case LibFunc_chmod:
1024    case LibFunc_chown:
1025    case LibFunc_clearerr:
1026    case LibFunc_closedir:
1027    case LibFunc_ctermid:
1028    case LibFunc_fclose:
1029    case LibFunc_feof:
1030    case LibFunc_fflush:
1031    case LibFunc_fgetc:
1032    case LibFunc_fgetc_unlocked:
1033    case LibFunc_fileno:
1034    case LibFunc_flockfile:
1035    case LibFunc_free:
1036    case LibFunc_fseek:
1037    case LibFunc_fseeko64:
1038    case LibFunc_fseeko:
1039    case LibFunc_fsetpos:
1040    case LibFunc_ftell:
1041    case LibFunc_ftello64:
1042    case LibFunc_ftello:
1043    case LibFunc_ftrylockfile:
1044    case LibFunc_funlockfile:
1045    case LibFunc_getc:
1046    case LibFunc_getc_unlocked:
1047    case LibFunc_getlogin_r:
1048    case LibFunc_mkdir:
1049    case LibFunc_mktime:
1050    case LibFunc_times:
1051    case LibFunc_vec_free:
1052      return (NumParams != 0 && FTy.getParamType(0)->isPointerTy());
1053    case LibFunc___kmpc_free_shared:
1054      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1055              IsSizeTTy(FTy.getParamType(1)));
1056  
1057    case LibFunc_fopen:
1058      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1059              FTy.getParamType(0)->isPointerTy() &&
1060              FTy.getParamType(1)->isPointerTy());
1061    case LibFunc_fork:
1062      return (NumParams == 0 && FTy.getReturnType()->isIntegerTy(32));
1063    case LibFunc_fdopen:
1064      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1065              FTy.getParamType(1)->isPointerTy());
1066    case LibFunc_fputc:
1067    case LibFunc_fputc_unlocked:
1068    case LibFunc_fstat:
1069    case LibFunc_frexp:
1070    case LibFunc_frexpf:
1071    case LibFunc_frexpl:
1072    case LibFunc_fstatvfs:
1073      return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1074    case LibFunc_fgets:
1075    case LibFunc_fgets_unlocked:
1076      return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1077              FTy.getParamType(2)->isPointerTy());
1078    case LibFunc_fread:
1079    case LibFunc_fread_unlocked:
1080      return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1081              FTy.getParamType(3)->isPointerTy());
1082    case LibFunc_fwrite:
1083    case LibFunc_fwrite_unlocked:
1084      return (NumParams == 4 && FTy.getReturnType()->isIntegerTy() &&
1085              FTy.getParamType(0)->isPointerTy() &&
1086              FTy.getParamType(1)->isIntegerTy() &&
1087              FTy.getParamType(2)->isIntegerTy() &&
1088              FTy.getParamType(3)->isPointerTy());
1089    case LibFunc_fputs:
1090    case LibFunc_fputs_unlocked:
1091      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1092              FTy.getParamType(1)->isPointerTy());
1093    case LibFunc_fscanf:
1094    case LibFunc_fiprintf:
1095    case LibFunc_small_fprintf:
1096    case LibFunc_fprintf:
1097      return (NumParams >= 2 && FTy.getReturnType()->isIntegerTy() &&
1098              FTy.getParamType(0)->isPointerTy() &&
1099              FTy.getParamType(1)->isPointerTy());
1100    case LibFunc_fgetpos:
1101      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1102              FTy.getParamType(1)->isPointerTy());
1103    case LibFunc_getchar:
1104    case LibFunc_getchar_unlocked:
1105      return (NumParams == 0 && FTy.getReturnType()->isIntegerTy());
1106    case LibFunc_gets:
1107      return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1108    case LibFunc_getitimer:
1109      return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1110    case LibFunc_ungetc:
1111      return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1112    case LibFunc_utime:
1113    case LibFunc_utimes:
1114      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1115              FTy.getParamType(1)->isPointerTy());
1116    case LibFunc_putc:
1117    case LibFunc_putc_unlocked:
1118      return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1119    case LibFunc_pread:
1120    case LibFunc_pwrite:
1121      return (NumParams == 4 && FTy.getParamType(1)->isPointerTy());
1122    case LibFunc_popen:
1123      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1124              FTy.getParamType(0)->isPointerTy() &&
1125              FTy.getParamType(1)->isPointerTy());
1126    case LibFunc_vscanf:
1127      return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1128    case LibFunc_vsscanf:
1129      return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1130              FTy.getParamType(2)->isPointerTy());
1131    case LibFunc_vfscanf:
1132      return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1133              FTy.getParamType(2)->isPointerTy());
1134    case LibFunc_valloc:
1135      return (FTy.getReturnType()->isPointerTy());
1136    case LibFunc_vprintf:
1137      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1138    case LibFunc_vfprintf:
1139    case LibFunc_vsprintf:
1140      return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1141              FTy.getParamType(1)->isPointerTy());
1142    case LibFunc_vsprintf_chk:
1143      return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
1144             FTy.getParamType(1)->isIntegerTy(32) &&
1145             IsSizeTTy(FTy.getParamType(2)) && FTy.getParamType(3)->isPointerTy();
1146    case LibFunc_vsnprintf:
1147      return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1148              FTy.getParamType(2)->isPointerTy());
1149    case LibFunc_vsnprintf_chk:
1150      return NumParams == 6 && FTy.getParamType(0)->isPointerTy() &&
1151             FTy.getParamType(2)->isIntegerTy(32) &&
1152             IsSizeTTy(FTy.getParamType(3)) && FTy.getParamType(4)->isPointerTy();
1153    case LibFunc_open:
1154      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1155    case LibFunc_opendir:
1156      return (NumParams == 1 && FTy.getReturnType()->isPointerTy() &&
1157              FTy.getParamType(0)->isPointerTy());
1158    case LibFunc_tmpfile:
1159      return (FTy.getReturnType()->isPointerTy());
1160    case LibFunc_htonl:
1161    case LibFunc_ntohl:
1162      return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1163              FTy.getReturnType() == FTy.getParamType(0));
1164    case LibFunc_htons:
1165    case LibFunc_ntohs:
1166      return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(16) &&
1167              FTy.getReturnType() == FTy.getParamType(0));
1168    case LibFunc_lstat:
1169      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1170              FTy.getParamType(1)->isPointerTy());
1171    case LibFunc_lchown:
1172      return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1173    case LibFunc_qsort:
1174      return (NumParams == 4 && FTy.getParamType(3)->isPointerTy());
1175    case LibFunc_dunder_strdup:
1176    case LibFunc_dunder_strndup:
1177      return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
1178              FTy.getParamType(0)->isPointerTy());
1179    case LibFunc_dunder_strtok_r:
1180      return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1181    case LibFunc_under_IO_putc:
1182      return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1183    case LibFunc_dunder_isoc99_scanf:
1184      return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1185    case LibFunc_stat64:
1186    case LibFunc_lstat64:
1187    case LibFunc_statvfs64:
1188      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1189              FTy.getParamType(1)->isPointerTy());
1190    case LibFunc_dunder_isoc99_sscanf:
1191      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1192              FTy.getParamType(1)->isPointerTy());
1193    case LibFunc_fopen64:
1194      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1195              FTy.getParamType(0)->isPointerTy() &&
1196              FTy.getParamType(1)->isPointerTy());
1197    case LibFunc_tmpfile64:
1198      return (FTy.getReturnType()->isPointerTy());
1199    case LibFunc_fstat64:
1200    case LibFunc_fstatvfs64:
1201      return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1202    case LibFunc_open64:
1203      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1204    case LibFunc_gettimeofday:
1205      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1206              FTy.getParamType(1)->isPointerTy());
1207  
1208    // new(unsigned int);
1209    case LibFunc_Znwj:
1210    // new(unsigned long);
1211    case LibFunc_Znwm:
1212    // new[](unsigned int);
1213    case LibFunc_Znaj:
1214    // new[](unsigned long);
1215    case LibFunc_Znam:
1216    // new(unsigned int);
1217    case LibFunc_msvc_new_int:
1218    // new(unsigned long long);
1219    case LibFunc_msvc_new_longlong:
1220    // new[](unsigned int);
1221    case LibFunc_msvc_new_array_int:
1222    // new[](unsigned long long);
1223    case LibFunc_msvc_new_array_longlong:
1224      return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
1225  
1226    // new(unsigned int, nothrow);
1227    case LibFunc_ZnwjRKSt9nothrow_t:
1228    // new(unsigned long, nothrow);
1229    case LibFunc_ZnwmRKSt9nothrow_t:
1230    // new[](unsigned int, nothrow);
1231    case LibFunc_ZnajRKSt9nothrow_t:
1232    // new[](unsigned long, nothrow);
1233    case LibFunc_ZnamRKSt9nothrow_t:
1234    // new(unsigned int, nothrow);
1235    case LibFunc_msvc_new_int_nothrow:
1236    // new(unsigned long long, nothrow);
1237    case LibFunc_msvc_new_longlong_nothrow:
1238    // new[](unsigned int, nothrow);
1239    case LibFunc_msvc_new_array_int_nothrow:
1240    // new[](unsigned long long, nothrow);
1241    case LibFunc_msvc_new_array_longlong_nothrow:
1242    // new(unsigned int, align_val_t)
1243    case LibFunc_ZnwjSt11align_val_t:
1244    // new(unsigned long, align_val_t)
1245    case LibFunc_ZnwmSt11align_val_t:
1246    // new[](unsigned int, align_val_t)
1247    case LibFunc_ZnajSt11align_val_t:
1248    // new[](unsigned long, align_val_t)
1249    case LibFunc_ZnamSt11align_val_t:
1250      return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
1251  
1252    // new(unsigned int, align_val_t, nothrow)
1253    case LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t:
1254    // new(unsigned long, align_val_t, nothrow)
1255    case LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t:
1256    // new[](unsigned int, align_val_t, nothrow)
1257    case LibFunc_ZnajSt11align_val_tRKSt9nothrow_t:
1258    // new[](unsigned long, align_val_t, nothrow)
1259    case LibFunc_ZnamSt11align_val_tRKSt9nothrow_t:
1260      return (NumParams == 3 && FTy.getReturnType()->isPointerTy());
1261  
1262    // void operator delete[](void*);
1263    case LibFunc_ZdaPv:
1264    // void operator delete(void*);
1265    case LibFunc_ZdlPv:
1266    // void operator delete[](void*);
1267    case LibFunc_msvc_delete_array_ptr32:
1268    // void operator delete[](void*);
1269    case LibFunc_msvc_delete_array_ptr64:
1270    // void operator delete(void*);
1271    case LibFunc_msvc_delete_ptr32:
1272    // void operator delete(void*);
1273    case LibFunc_msvc_delete_ptr64:
1274      return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1275  
1276    // void operator delete[](void*, nothrow);
1277    case LibFunc_ZdaPvRKSt9nothrow_t:
1278    // void operator delete[](void*, unsigned int);
1279    case LibFunc_ZdaPvj:
1280    // void operator delete[](void*, unsigned long);
1281    case LibFunc_ZdaPvm:
1282    // void operator delete(void*, nothrow);
1283    case LibFunc_ZdlPvRKSt9nothrow_t:
1284    // void operator delete(void*, unsigned int);
1285    case LibFunc_ZdlPvj:
1286    // void operator delete(void*, unsigned long);
1287    case LibFunc_ZdlPvm:
1288    // void operator delete(void*, align_val_t)
1289    case LibFunc_ZdlPvSt11align_val_t:
1290    // void operator delete[](void*, align_val_t)
1291    case LibFunc_ZdaPvSt11align_val_t:
1292    // void operator delete[](void*, unsigned int);
1293    case LibFunc_msvc_delete_array_ptr32_int:
1294    // void operator delete[](void*, nothrow);
1295    case LibFunc_msvc_delete_array_ptr32_nothrow:
1296    // void operator delete[](void*, unsigned long long);
1297    case LibFunc_msvc_delete_array_ptr64_longlong:
1298    // void operator delete[](void*, nothrow);
1299    case LibFunc_msvc_delete_array_ptr64_nothrow:
1300    // void operator delete(void*, unsigned int);
1301    case LibFunc_msvc_delete_ptr32_int:
1302    // void operator delete(void*, nothrow);
1303    case LibFunc_msvc_delete_ptr32_nothrow:
1304    // void operator delete(void*, unsigned long long);
1305    case LibFunc_msvc_delete_ptr64_longlong:
1306    // void operator delete(void*, nothrow);
1307    case LibFunc_msvc_delete_ptr64_nothrow:
1308      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1309  
1310    // void operator delete(void*, align_val_t, nothrow)
1311    case LibFunc_ZdlPvSt11align_val_tRKSt9nothrow_t:
1312    // void operator delete[](void*, align_val_t, nothrow)
1313    case LibFunc_ZdaPvSt11align_val_tRKSt9nothrow_t:
1314    // void operator delete(void*, unsigned int, align_val_t)
1315    case LibFunc_ZdlPvjSt11align_val_t:
1316    // void operator delete(void*, unsigned long, align_val_t)
1317    case LibFunc_ZdlPvmSt11align_val_t:
1318    // void operator delete[](void*, unsigned int, align_val_t);
1319    case LibFunc_ZdaPvjSt11align_val_t:
1320    // void operator delete[](void*, unsigned long, align_val_t);
1321    case LibFunc_ZdaPvmSt11align_val_t:
1322      return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1323  
1324    // void __atomic_load(size_t, void *, void *, int)
1325    case LibFunc_atomic_load:
1326    // void __atomic_store(size_t, void *, void *, int)
1327    case LibFunc_atomic_store:
1328      return (NumParams == 4 && FTy.getParamType(0)->isIntegerTy() &&
1329              FTy.getParamType(1)->isPointerTy() &&
1330              FTy.getParamType(2)->isPointerTy() &&
1331              FTy.getParamType(3)->isIntegerTy());
1332  
1333    case LibFunc_memset_pattern16:
1334      return (!FTy.isVarArg() && NumParams == 3 &&
1335              FTy.getParamType(0)->isPointerTy() &&
1336              FTy.getParamType(1)->isPointerTy() &&
1337              FTy.getParamType(2)->isIntegerTy());
1338  
1339    case LibFunc_cxa_guard_abort:
1340    case LibFunc_cxa_guard_acquire:
1341    case LibFunc_cxa_guard_release:
1342    case LibFunc_nvvm_reflect:
1343      return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1344  
1345    case LibFunc_sincospi_stret:
1346    case LibFunc_sincospif_stret:
1347      return (NumParams == 1 && FTy.getParamType(0)->isFloatingPointTy());
1348  
1349    case LibFunc_acos:
1350    case LibFunc_acos_finite:
1351    case LibFunc_acosf:
1352    case LibFunc_acosf_finite:
1353    case LibFunc_acosh:
1354    case LibFunc_acosh_finite:
1355    case LibFunc_acoshf:
1356    case LibFunc_acoshf_finite:
1357    case LibFunc_acoshl:
1358    case LibFunc_acoshl_finite:
1359    case LibFunc_acosl:
1360    case LibFunc_acosl_finite:
1361    case LibFunc_asin:
1362    case LibFunc_asin_finite:
1363    case LibFunc_asinf:
1364    case LibFunc_asinf_finite:
1365    case LibFunc_asinh:
1366    case LibFunc_asinhf:
1367    case LibFunc_asinhl:
1368    case LibFunc_asinl:
1369    case LibFunc_asinl_finite:
1370    case LibFunc_atan:
1371    case LibFunc_atanf:
1372    case LibFunc_atanh:
1373    case LibFunc_atanh_finite:
1374    case LibFunc_atanhf:
1375    case LibFunc_atanhf_finite:
1376    case LibFunc_atanhl:
1377    case LibFunc_atanhl_finite:
1378    case LibFunc_atanl:
1379    case LibFunc_cbrt:
1380    case LibFunc_cbrtf:
1381    case LibFunc_cbrtl:
1382    case LibFunc_ceil:
1383    case LibFunc_ceilf:
1384    case LibFunc_ceill:
1385    case LibFunc_cos:
1386    case LibFunc_cosf:
1387    case LibFunc_cosh:
1388    case LibFunc_cosh_finite:
1389    case LibFunc_coshf:
1390    case LibFunc_coshf_finite:
1391    case LibFunc_coshl:
1392    case LibFunc_coshl_finite:
1393    case LibFunc_cosl:
1394    case LibFunc_exp10:
1395    case LibFunc_exp10_finite:
1396    case LibFunc_exp10f:
1397    case LibFunc_exp10f_finite:
1398    case LibFunc_exp10l:
1399    case LibFunc_exp10l_finite:
1400    case LibFunc_exp2:
1401    case LibFunc_exp2_finite:
1402    case LibFunc_exp2f:
1403    case LibFunc_exp2f_finite:
1404    case LibFunc_exp2l:
1405    case LibFunc_exp2l_finite:
1406    case LibFunc_exp:
1407    case LibFunc_exp_finite:
1408    case LibFunc_expf:
1409    case LibFunc_expf_finite:
1410    case LibFunc_expl:
1411    case LibFunc_expl_finite:
1412    case LibFunc_expm1:
1413    case LibFunc_expm1f:
1414    case LibFunc_expm1l:
1415    case LibFunc_fabs:
1416    case LibFunc_fabsf:
1417    case LibFunc_fabsl:
1418    case LibFunc_floor:
1419    case LibFunc_floorf:
1420    case LibFunc_floorl:
1421    case LibFunc_log10:
1422    case LibFunc_log10_finite:
1423    case LibFunc_log10f:
1424    case LibFunc_log10f_finite:
1425    case LibFunc_log10l:
1426    case LibFunc_log10l_finite:
1427    case LibFunc_log1p:
1428    case LibFunc_log1pf:
1429    case LibFunc_log1pl:
1430    case LibFunc_log2:
1431    case LibFunc_log2_finite:
1432    case LibFunc_log2f:
1433    case LibFunc_log2f_finite:
1434    case LibFunc_log2l:
1435    case LibFunc_log2l_finite:
1436    case LibFunc_log:
1437    case LibFunc_log_finite:
1438    case LibFunc_logb:
1439    case LibFunc_logbf:
1440    case LibFunc_logbl:
1441    case LibFunc_logf:
1442    case LibFunc_logf_finite:
1443    case LibFunc_logl:
1444    case LibFunc_logl_finite:
1445    case LibFunc_nearbyint:
1446    case LibFunc_nearbyintf:
1447    case LibFunc_nearbyintl:
1448    case LibFunc_rint:
1449    case LibFunc_rintf:
1450    case LibFunc_rintl:
1451    case LibFunc_round:
1452    case LibFunc_roundf:
1453    case LibFunc_roundl:
1454    case LibFunc_roundeven:
1455    case LibFunc_roundevenf:
1456    case LibFunc_roundevenl:
1457    case LibFunc_sin:
1458    case LibFunc_sinf:
1459    case LibFunc_sinh:
1460    case LibFunc_sinh_finite:
1461    case LibFunc_sinhf:
1462    case LibFunc_sinhf_finite:
1463    case LibFunc_sinhl:
1464    case LibFunc_sinhl_finite:
1465    case LibFunc_sinl:
1466    case LibFunc_sqrt:
1467    case LibFunc_sqrt_finite:
1468    case LibFunc_sqrtf:
1469    case LibFunc_sqrtf_finite:
1470    case LibFunc_sqrtl:
1471    case LibFunc_sqrtl_finite:
1472    case LibFunc_tan:
1473    case LibFunc_tanf:
1474    case LibFunc_tanh:
1475    case LibFunc_tanhf:
1476    case LibFunc_tanhl:
1477    case LibFunc_tanl:
1478    case LibFunc_trunc:
1479    case LibFunc_truncf:
1480    case LibFunc_truncl:
1481      return (NumParams == 1 && FTy.getReturnType()->isFloatingPointTy() &&
1482              FTy.getReturnType() == FTy.getParamType(0));
1483  
1484    case LibFunc_atan2:
1485    case LibFunc_atan2_finite:
1486    case LibFunc_atan2f:
1487    case LibFunc_atan2f_finite:
1488    case LibFunc_atan2l:
1489    case LibFunc_atan2l_finite:
1490    case LibFunc_fmin:
1491    case LibFunc_fminf:
1492    case LibFunc_fminl:
1493    case LibFunc_fmax:
1494    case LibFunc_fmaxf:
1495    case LibFunc_fmaxl:
1496    case LibFunc_fmod:
1497    case LibFunc_fmodf:
1498    case LibFunc_fmodl:
1499    case LibFunc_remainder:
1500    case LibFunc_remainderf:
1501    case LibFunc_remainderl:
1502    case LibFunc_copysign:
1503    case LibFunc_copysignf:
1504    case LibFunc_copysignl:
1505    case LibFunc_pow:
1506    case LibFunc_pow_finite:
1507    case LibFunc_powf:
1508    case LibFunc_powf_finite:
1509    case LibFunc_powl:
1510    case LibFunc_powl_finite:
1511      return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1512              FTy.getReturnType() == FTy.getParamType(0) &&
1513              FTy.getReturnType() == FTy.getParamType(1));
1514  
1515    case LibFunc_ldexp:
1516    case LibFunc_ldexpf:
1517    case LibFunc_ldexpl:
1518      return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1519              FTy.getReturnType() == FTy.getParamType(0) &&
1520              FTy.getParamType(1)->isIntegerTy(getIntSize()));
1521  
1522    case LibFunc_ffs:
1523    case LibFunc_ffsl:
1524    case LibFunc_ffsll:
1525    case LibFunc_fls:
1526    case LibFunc_flsl:
1527    case LibFunc_flsll:
1528      return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1529              FTy.getParamType(0)->isIntegerTy());
1530  
1531    case LibFunc_isdigit:
1532    case LibFunc_isascii:
1533    case LibFunc_toascii:
1534    case LibFunc_putchar:
1535    case LibFunc_putchar_unlocked:
1536      return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1537              FTy.getReturnType() == FTy.getParamType(0));
1538  
1539    case LibFunc_abs:
1540    case LibFunc_labs:
1541    case LibFunc_llabs:
1542      return (NumParams == 1 && FTy.getReturnType()->isIntegerTy() &&
1543              FTy.getReturnType() == FTy.getParamType(0));
1544  
1545    case LibFunc_cxa_atexit:
1546      return (NumParams == 3 && FTy.getReturnType()->isIntegerTy() &&
1547              FTy.getParamType(0)->isPointerTy() &&
1548              FTy.getParamType(1)->isPointerTy() &&
1549              FTy.getParamType(2)->isPointerTy());
1550  
1551    case LibFunc_sinpi:
1552    case LibFunc_cospi:
1553      return (NumParams == 1 && FTy.getReturnType()->isDoubleTy() &&
1554              FTy.getReturnType() == FTy.getParamType(0));
1555  
1556    case LibFunc_sinpif:
1557    case LibFunc_cospif:
1558      return (NumParams == 1 && FTy.getReturnType()->isFloatTy() &&
1559              FTy.getReturnType() == FTy.getParamType(0));
1560  
1561    case LibFunc_strnlen:
1562      return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(1) &&
1563              FTy.getParamType(0)->isPointerTy() &&
1564              IsSizeTTy(FTy.getParamType(1)));
1565  
1566    case LibFunc_posix_memalign:
1567      return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1568              FTy.getParamType(0)->isPointerTy() &&
1569              IsSizeTTy(FTy.getParamType(1)) && IsSizeTTy(FTy.getParamType(2)));
1570  
1571    case LibFunc_wcslen:
1572      return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
1573              FTy.getReturnType()->isIntegerTy());
1574  
1575    case LibFunc_cabs:
1576    case LibFunc_cabsf:
1577    case LibFunc_cabsl: {
1578      Type* RetTy = FTy.getReturnType();
1579      if (!RetTy->isFloatingPointTy())
1580        return false;
1581  
1582      // NOTE: These prototypes are target specific and currently support
1583      // "complex" passed as an array or discrete real & imaginary parameters.
1584      // Add other calling conventions to enable libcall optimizations.
1585      if (NumParams == 1)
1586        return (FTy.getParamType(0)->isArrayTy() &&
1587                FTy.getParamType(0)->getArrayNumElements() == 2 &&
1588                FTy.getParamType(0)->getArrayElementType() == RetTy);
1589      else if (NumParams == 2)
1590        return (FTy.getParamType(0) == RetTy && FTy.getParamType(1) == RetTy);
1591      else
1592        return false;
1593    }
1594    case LibFunc::NumLibFuncs:
1595    case LibFunc::NotLibFunc:
1596      break;
1597    }
1598  
1599    llvm_unreachable("Invalid libfunc");
1600  }
1601  
1602  bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl,
1603                                         LibFunc &F) const {
1604    // Intrinsics don't overlap w/libcalls; if our module has a large number of
1605    // intrinsics, this ends up being an interesting compile time win since we
1606    // avoid string normalization and comparison.
1607    if (FDecl.isIntrinsic()) return false;
1608  
1609    const DataLayout *DL =
1610        FDecl.getParent() ? &FDecl.getParent()->getDataLayout() : nullptr;
1611    return getLibFunc(FDecl.getName(), F) &&
1612           isValidProtoForLibFunc(*FDecl.getFunctionType(), F, DL);
1613  }
1614  
1615  void TargetLibraryInfoImpl::disableAllFunctions() {
1616    memset(AvailableArray, 0, sizeof(AvailableArray));
1617  }
1618  
1619  static bool compareByScalarFnName(const VecDesc &LHS, const VecDesc &RHS) {
1620    return LHS.ScalarFnName < RHS.ScalarFnName;
1621  }
1622  
1623  static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) {
1624    return LHS.VectorFnName < RHS.VectorFnName;
1625  }
1626  
1627  static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) {
1628    return LHS.ScalarFnName < S;
1629  }
1630  
1631  void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) {
1632    llvm::append_range(VectorDescs, Fns);
1633    llvm::sort(VectorDescs, compareByScalarFnName);
1634  
1635    llvm::append_range(ScalarDescs, Fns);
1636    llvm::sort(ScalarDescs, compareByVectorFnName);
1637  }
1638  
1639  void TargetLibraryInfoImpl::addVectorizableFunctionsFromVecLib(
1640      enum VectorLibrary VecLib) {
1641    switch (VecLib) {
1642    case Accelerate: {
1643      const VecDesc VecFuncs[] = {
1644      #define TLI_DEFINE_ACCELERATE_VECFUNCS
1645      #include "llvm/Analysis/VecFuncs.def"
1646      };
1647      addVectorizableFunctions(VecFuncs);
1648      break;
1649    }
1650    case DarwinLibSystemM: {
1651      const VecDesc VecFuncs[] = {
1652      #define TLI_DEFINE_DARWIN_LIBSYSTEM_M_VECFUNCS
1653      #include "llvm/Analysis/VecFuncs.def"
1654      };
1655      addVectorizableFunctions(VecFuncs);
1656      break;
1657    }
1658    case LIBMVEC_X86: {
1659      const VecDesc VecFuncs[] = {
1660      #define TLI_DEFINE_LIBMVEC_X86_VECFUNCS
1661      #include "llvm/Analysis/VecFuncs.def"
1662      };
1663      addVectorizableFunctions(VecFuncs);
1664      break;
1665    }
1666    case MASSV: {
1667      const VecDesc VecFuncs[] = {
1668      #define TLI_DEFINE_MASSV_VECFUNCS
1669      #include "llvm/Analysis/VecFuncs.def"
1670      };
1671      addVectorizableFunctions(VecFuncs);
1672      break;
1673    }
1674    case SVML: {
1675      const VecDesc VecFuncs[] = {
1676      #define TLI_DEFINE_SVML_VECFUNCS
1677      #include "llvm/Analysis/VecFuncs.def"
1678      };
1679      addVectorizableFunctions(VecFuncs);
1680      break;
1681    }
1682    case NoLibrary:
1683      break;
1684    }
1685  }
1686  
1687  bool TargetLibraryInfoImpl::isFunctionVectorizable(StringRef funcName) const {
1688    funcName = sanitizeFunctionName(funcName);
1689    if (funcName.empty())
1690      return false;
1691  
1692    std::vector<VecDesc>::const_iterator I =
1693        llvm::lower_bound(VectorDescs, funcName, compareWithScalarFnName);
1694    return I != VectorDescs.end() && StringRef(I->ScalarFnName) == funcName;
1695  }
1696  
1697  StringRef
1698  TargetLibraryInfoImpl::getVectorizedFunction(StringRef F,
1699                                               const ElementCount &VF) const {
1700    F = sanitizeFunctionName(F);
1701    if (F.empty())
1702      return F;
1703    std::vector<VecDesc>::const_iterator I =
1704        llvm::lower_bound(VectorDescs, F, compareWithScalarFnName);
1705    while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == F) {
1706      if (I->VectorizationFactor == VF)
1707        return I->VectorFnName;
1708      ++I;
1709    }
1710    return StringRef();
1711  }
1712  
1713  TargetLibraryInfo TargetLibraryAnalysis::run(const Function &F,
1714                                               FunctionAnalysisManager &) {
1715    if (!BaselineInfoImpl)
1716      BaselineInfoImpl =
1717          TargetLibraryInfoImpl(Triple(F.getParent()->getTargetTriple()));
1718    return TargetLibraryInfo(*BaselineInfoImpl, &F);
1719  }
1720  
1721  unsigned TargetLibraryInfoImpl::getWCharSize(const Module &M) const {
1722    if (auto *ShortWChar = cast_or_null<ConstantAsMetadata>(
1723        M.getModuleFlag("wchar_size")))
1724      return cast<ConstantInt>(ShortWChar->getValue())->getZExtValue();
1725    return 0;
1726  }
1727  
1728  TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass()
1729      : ImmutablePass(ID), TLA(TargetLibraryInfoImpl()) {
1730    initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1731  }
1732  
1733  TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T)
1734      : ImmutablePass(ID), TLA(TargetLibraryInfoImpl(T)) {
1735    initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1736  }
1737  
1738  TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(
1739      const TargetLibraryInfoImpl &TLIImpl)
1740      : ImmutablePass(ID), TLA(TLIImpl) {
1741    initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1742  }
1743  
1744  AnalysisKey TargetLibraryAnalysis::Key;
1745  
1746  // Register the basic pass.
1747  INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo",
1748                  "Target Library Information", false, true)
1749  char TargetLibraryInfoWrapperPass::ID = 0;
1750  
1751  void TargetLibraryInfoWrapperPass::anchor() {}
1752  
1753  void TargetLibraryInfoImpl::getWidestVF(StringRef ScalarF,
1754                                          ElementCount &FixedVF,
1755                                          ElementCount &ScalableVF) const {
1756    ScalarF = sanitizeFunctionName(ScalarF);
1757    // Use '0' here because a type of the form <vscale x 1 x ElTy> is not the
1758    // same as a scalar.
1759    ScalableVF = ElementCount::getScalable(0);
1760    FixedVF = ElementCount::getFixed(1);
1761    if (ScalarF.empty())
1762      return;
1763  
1764    std::vector<VecDesc>::const_iterator I =
1765        llvm::lower_bound(VectorDescs, ScalarF, compareWithScalarFnName);
1766    while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == ScalarF) {
1767      ElementCount *VF =
1768          I->VectorizationFactor.isScalable() ? &ScalableVF : &FixedVF;
1769      if (ElementCount::isKnownGT(I->VectorizationFactor, *VF))
1770        *VF = I->VectorizationFactor;
1771      ++I;
1772    }
1773  }
1774