1 //===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the TargetLibraryInfo class.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/Analysis/TargetLibraryInfo.h"
15 #include "llvm/ADT/Triple.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                clEnumValEnd));
27 
28 const char *const TargetLibraryInfoImpl::StandardNames[LibFunc::NumLibFuncs] = {
29 #define TLI_DEFINE_STRING
30 #include "llvm/Analysis/TargetLibraryInfo.def"
31 };
32 
33 static bool hasSinCosPiStret(const Triple &T) {
34   // Only Darwin variants have _stret versions of combined trig functions.
35   if (!T.isOSDarwin())
36     return false;
37 
38   // The ABI is rather complicated on x86, so don't do anything special there.
39   if (T.getArch() == Triple::x86)
40     return false;
41 
42   if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
43     return false;
44 
45   if (T.isiOS() && T.isOSVersionLT(7, 0))
46     return false;
47 
48   return true;
49 }
50 
51 /// initialize - Initialize the set of available library functions based on the
52 /// specified target triple.  This should be carefully written so that a missing
53 /// target triple gets a sane set of defaults.
54 static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
55                        ArrayRef<const char *> StandardNames) {
56   // Verify that the StandardNames array is in alphabetical order.
57   assert(std::is_sorted(StandardNames.begin(), StandardNames.end(),
58                         [](const char *LHS, const char *RHS) {
59                           return strcmp(LHS, RHS) < 0;
60                         }) &&
61          "TargetLibraryInfoImpl function names must be sorted");
62 
63   if (T.getArch() == Triple::r600 ||
64       T.getArch() == Triple::amdgcn) {
65     TLI.setUnavailable(LibFunc::ldexp);
66     TLI.setUnavailable(LibFunc::ldexpf);
67     TLI.setUnavailable(LibFunc::ldexpl);
68   }
69 
70   // There are no library implementations of mempcy and memset for AMD gpus and
71   // these can be difficult to lower in the backend.
72   if (T.getArch() == Triple::r600 ||
73       T.getArch() == Triple::amdgcn) {
74     TLI.setUnavailable(LibFunc::memcpy);
75     TLI.setUnavailable(LibFunc::memset);
76     TLI.setUnavailable(LibFunc::memset_pattern16);
77     return;
78   }
79 
80   // memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
81   // All versions of watchOS support it.
82   if (T.isMacOSX()) {
83     if (T.isMacOSXVersionLT(10, 5))
84       TLI.setUnavailable(LibFunc::memset_pattern16);
85   } else if (T.isiOS()) {
86     if (T.isOSVersionLT(3, 0))
87       TLI.setUnavailable(LibFunc::memset_pattern16);
88   } else if (!T.isWatchOS()) {
89     TLI.setUnavailable(LibFunc::memset_pattern16);
90   }
91 
92   if (!hasSinCosPiStret(T)) {
93     TLI.setUnavailable(LibFunc::sinpi);
94     TLI.setUnavailable(LibFunc::sinpif);
95     TLI.setUnavailable(LibFunc::cospi);
96     TLI.setUnavailable(LibFunc::cospif);
97     TLI.setUnavailable(LibFunc::sincospi_stret);
98     TLI.setUnavailable(LibFunc::sincospif_stret);
99   }
100 
101   if (T.isMacOSX() && T.getArch() == Triple::x86 &&
102       !T.isMacOSXVersionLT(10, 7)) {
103     // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
104     // we don't care about) have two versions; on recent OSX, the one we want
105     // has a $UNIX2003 suffix. The two implementations are identical except
106     // for the return value in some edge cases.  However, we don't want to
107     // generate code that depends on the old symbols.
108     TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
109     TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
110   }
111 
112   // iprintf and friends are only available on XCore and TCE.
113   if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
114     TLI.setUnavailable(LibFunc::iprintf);
115     TLI.setUnavailable(LibFunc::siprintf);
116     TLI.setUnavailable(LibFunc::fiprintf);
117   }
118 
119   if (T.isOSWindows() && !T.isOSCygMing()) {
120     // Win32 does not support long double
121     TLI.setUnavailable(LibFunc::acosl);
122     TLI.setUnavailable(LibFunc::asinl);
123     TLI.setUnavailable(LibFunc::atanl);
124     TLI.setUnavailable(LibFunc::atan2l);
125     TLI.setUnavailable(LibFunc::ceill);
126     TLI.setUnavailable(LibFunc::copysignl);
127     TLI.setUnavailable(LibFunc::cosl);
128     TLI.setUnavailable(LibFunc::coshl);
129     TLI.setUnavailable(LibFunc::expl);
130     TLI.setUnavailable(LibFunc::fabsf); // Win32 and Win64 both lack fabsf
131     TLI.setUnavailable(LibFunc::fabsl);
132     TLI.setUnavailable(LibFunc::floorl);
133     TLI.setUnavailable(LibFunc::fmaxl);
134     TLI.setUnavailable(LibFunc::fminl);
135     TLI.setUnavailable(LibFunc::fmodl);
136     TLI.setUnavailable(LibFunc::frexpl);
137     TLI.setUnavailable(LibFunc::ldexpf);
138     TLI.setUnavailable(LibFunc::ldexpl);
139     TLI.setUnavailable(LibFunc::logl);
140     TLI.setUnavailable(LibFunc::modfl);
141     TLI.setUnavailable(LibFunc::powl);
142     TLI.setUnavailable(LibFunc::sinl);
143     TLI.setUnavailable(LibFunc::sinhl);
144     TLI.setUnavailable(LibFunc::sqrtl);
145     TLI.setUnavailable(LibFunc::tanl);
146     TLI.setUnavailable(LibFunc::tanhl);
147 
148     // Win32 only has C89 math
149     TLI.setUnavailable(LibFunc::acosh);
150     TLI.setUnavailable(LibFunc::acoshf);
151     TLI.setUnavailable(LibFunc::acoshl);
152     TLI.setUnavailable(LibFunc::asinh);
153     TLI.setUnavailable(LibFunc::asinhf);
154     TLI.setUnavailable(LibFunc::asinhl);
155     TLI.setUnavailable(LibFunc::atanh);
156     TLI.setUnavailable(LibFunc::atanhf);
157     TLI.setUnavailable(LibFunc::atanhl);
158     TLI.setUnavailable(LibFunc::cbrt);
159     TLI.setUnavailable(LibFunc::cbrtf);
160     TLI.setUnavailable(LibFunc::cbrtl);
161     TLI.setUnavailable(LibFunc::exp2);
162     TLI.setUnavailable(LibFunc::exp2f);
163     TLI.setUnavailable(LibFunc::exp2l);
164     TLI.setUnavailable(LibFunc::expm1);
165     TLI.setUnavailable(LibFunc::expm1f);
166     TLI.setUnavailable(LibFunc::expm1l);
167     TLI.setUnavailable(LibFunc::log2);
168     TLI.setUnavailable(LibFunc::log2f);
169     TLI.setUnavailable(LibFunc::log2l);
170     TLI.setUnavailable(LibFunc::log1p);
171     TLI.setUnavailable(LibFunc::log1pf);
172     TLI.setUnavailable(LibFunc::log1pl);
173     TLI.setUnavailable(LibFunc::logb);
174     TLI.setUnavailable(LibFunc::logbf);
175     TLI.setUnavailable(LibFunc::logbl);
176     TLI.setUnavailable(LibFunc::nearbyint);
177     TLI.setUnavailable(LibFunc::nearbyintf);
178     TLI.setUnavailable(LibFunc::nearbyintl);
179     TLI.setUnavailable(LibFunc::rint);
180     TLI.setUnavailable(LibFunc::rintf);
181     TLI.setUnavailable(LibFunc::rintl);
182     TLI.setUnavailable(LibFunc::round);
183     TLI.setUnavailable(LibFunc::roundf);
184     TLI.setUnavailable(LibFunc::roundl);
185     TLI.setUnavailable(LibFunc::trunc);
186     TLI.setUnavailable(LibFunc::truncf);
187     TLI.setUnavailable(LibFunc::truncl);
188 
189     // Win32 provides some C99 math with mangled names
190     TLI.setAvailableWithName(LibFunc::copysign, "_copysign");
191 
192     if (T.getArch() == Triple::x86) {
193       // Win32 on x86 implements single-precision math functions as macros
194       TLI.setUnavailable(LibFunc::acosf);
195       TLI.setUnavailable(LibFunc::asinf);
196       TLI.setUnavailable(LibFunc::atanf);
197       TLI.setUnavailable(LibFunc::atan2f);
198       TLI.setUnavailable(LibFunc::ceilf);
199       TLI.setUnavailable(LibFunc::copysignf);
200       TLI.setUnavailable(LibFunc::cosf);
201       TLI.setUnavailable(LibFunc::coshf);
202       TLI.setUnavailable(LibFunc::expf);
203       TLI.setUnavailable(LibFunc::floorf);
204       TLI.setUnavailable(LibFunc::fminf);
205       TLI.setUnavailable(LibFunc::fmaxf);
206       TLI.setUnavailable(LibFunc::fmodf);
207       TLI.setUnavailable(LibFunc::logf);
208       TLI.setUnavailable(LibFunc::powf);
209       TLI.setUnavailable(LibFunc::sinf);
210       TLI.setUnavailable(LibFunc::sinhf);
211       TLI.setUnavailable(LibFunc::sqrtf);
212       TLI.setUnavailable(LibFunc::tanf);
213       TLI.setUnavailable(LibFunc::tanhf);
214     }
215 
216     // Win32 does *not* provide provide these functions, but they are
217     // generally available on POSIX-compliant systems:
218     TLI.setUnavailable(LibFunc::access);
219     TLI.setUnavailable(LibFunc::bcmp);
220     TLI.setUnavailable(LibFunc::bcopy);
221     TLI.setUnavailable(LibFunc::bzero);
222     TLI.setUnavailable(LibFunc::chmod);
223     TLI.setUnavailable(LibFunc::chown);
224     TLI.setUnavailable(LibFunc::closedir);
225     TLI.setUnavailable(LibFunc::ctermid);
226     TLI.setUnavailable(LibFunc::fdopen);
227     TLI.setUnavailable(LibFunc::ffs);
228     TLI.setUnavailable(LibFunc::fileno);
229     TLI.setUnavailable(LibFunc::flockfile);
230     TLI.setUnavailable(LibFunc::fseeko);
231     TLI.setUnavailable(LibFunc::fstat);
232     TLI.setUnavailable(LibFunc::fstatvfs);
233     TLI.setUnavailable(LibFunc::ftello);
234     TLI.setUnavailable(LibFunc::ftrylockfile);
235     TLI.setUnavailable(LibFunc::funlockfile);
236     TLI.setUnavailable(LibFunc::getc_unlocked);
237     TLI.setUnavailable(LibFunc::getitimer);
238     TLI.setUnavailable(LibFunc::getlogin_r);
239     TLI.setUnavailable(LibFunc::getpwnam);
240     TLI.setUnavailable(LibFunc::gettimeofday);
241     TLI.setUnavailable(LibFunc::htonl);
242     TLI.setUnavailable(LibFunc::htons);
243     TLI.setUnavailable(LibFunc::lchown);
244     TLI.setUnavailable(LibFunc::lstat);
245     TLI.setUnavailable(LibFunc::memccpy);
246     TLI.setUnavailable(LibFunc::mkdir);
247     TLI.setUnavailable(LibFunc::ntohl);
248     TLI.setUnavailable(LibFunc::ntohs);
249     TLI.setUnavailable(LibFunc::open);
250     TLI.setUnavailable(LibFunc::opendir);
251     TLI.setUnavailable(LibFunc::pclose);
252     TLI.setUnavailable(LibFunc::popen);
253     TLI.setUnavailable(LibFunc::pread);
254     TLI.setUnavailable(LibFunc::pwrite);
255     TLI.setUnavailable(LibFunc::read);
256     TLI.setUnavailable(LibFunc::readlink);
257     TLI.setUnavailable(LibFunc::realpath);
258     TLI.setUnavailable(LibFunc::rmdir);
259     TLI.setUnavailable(LibFunc::setitimer);
260     TLI.setUnavailable(LibFunc::stat);
261     TLI.setUnavailable(LibFunc::statvfs);
262     TLI.setUnavailable(LibFunc::stpcpy);
263     TLI.setUnavailable(LibFunc::stpncpy);
264     TLI.setUnavailable(LibFunc::strcasecmp);
265     TLI.setUnavailable(LibFunc::strncasecmp);
266     TLI.setUnavailable(LibFunc::times);
267     TLI.setUnavailable(LibFunc::uname);
268     TLI.setUnavailable(LibFunc::unlink);
269     TLI.setUnavailable(LibFunc::unsetenv);
270     TLI.setUnavailable(LibFunc::utime);
271     TLI.setUnavailable(LibFunc::utimes);
272     TLI.setUnavailable(LibFunc::write);
273 
274     // Win32 does *not* provide provide these functions, but they are
275     // specified by C99:
276     TLI.setUnavailable(LibFunc::atoll);
277     TLI.setUnavailable(LibFunc::frexpf);
278     TLI.setUnavailable(LibFunc::llabs);
279   }
280 
281   switch (T.getOS()) {
282   case Triple::MacOSX:
283     // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0
284     // and their names are __exp10 and __exp10f. exp10l is not available on
285     // OS X or iOS.
286     TLI.setUnavailable(LibFunc::exp10l);
287     if (T.isMacOSXVersionLT(10, 9)) {
288       TLI.setUnavailable(LibFunc::exp10);
289       TLI.setUnavailable(LibFunc::exp10f);
290     } else {
291       TLI.setAvailableWithName(LibFunc::exp10, "__exp10");
292       TLI.setAvailableWithName(LibFunc::exp10f, "__exp10f");
293     }
294     break;
295   case Triple::IOS:
296   case Triple::TvOS:
297   case Triple::WatchOS:
298     TLI.setUnavailable(LibFunc::exp10l);
299     if (!T.isWatchOS() && (T.isOSVersionLT(7, 0) ||
300                            (T.isOSVersionLT(9, 0) &&
301                             (T.getArch() == Triple::x86 ||
302                              T.getArch() == Triple::x86_64)))) {
303       TLI.setUnavailable(LibFunc::exp10);
304       TLI.setUnavailable(LibFunc::exp10f);
305     } else {
306       TLI.setAvailableWithName(LibFunc::exp10, "__exp10");
307       TLI.setAvailableWithName(LibFunc::exp10f, "__exp10f");
308     }
309     break;
310   case Triple::Linux:
311     // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
312     // buggy prior to glibc version 2.18. Until this version is widely deployed
313     // or we have a reasonable detection strategy, we cannot use exp10 reliably
314     // on Linux.
315     //
316     // Fall through to disable all of them.
317   default:
318     TLI.setUnavailable(LibFunc::exp10);
319     TLI.setUnavailable(LibFunc::exp10f);
320     TLI.setUnavailable(LibFunc::exp10l);
321   }
322 
323   // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
324   // Linux (GLIBC):
325   // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
326   // http://svn.freebsd.org/base/head/lib/libc/string/ffsl.c
327   // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
328   switch (T.getOS()) {
329   case Triple::Darwin:
330   case Triple::MacOSX:
331   case Triple::IOS:
332   case Triple::TvOS:
333   case Triple::WatchOS:
334   case Triple::FreeBSD:
335   case Triple::Linux:
336     break;
337   default:
338     TLI.setUnavailable(LibFunc::ffsl);
339   }
340 
341   // ffsll is available on at least FreeBSD and Linux (GLIBC):
342   // http://svn.freebsd.org/base/head/lib/libc/string/ffsll.c
343   // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
344   switch (T.getOS()) {
345   case Triple::Darwin:
346   case Triple::MacOSX:
347   case Triple::IOS:
348   case Triple::TvOS:
349   case Triple::WatchOS:
350   case Triple::FreeBSD:
351   case Triple::Linux:
352     break;
353   default:
354     TLI.setUnavailable(LibFunc::ffsll);
355   }
356 
357   // The following functions are available on at least FreeBSD:
358   // http://svn.freebsd.org/base/head/lib/libc/string/fls.c
359   // http://svn.freebsd.org/base/head/lib/libc/string/flsl.c
360   // http://svn.freebsd.org/base/head/lib/libc/string/flsll.c
361   if (!T.isOSFreeBSD()) {
362     TLI.setUnavailable(LibFunc::fls);
363     TLI.setUnavailable(LibFunc::flsl);
364     TLI.setUnavailable(LibFunc::flsll);
365   }
366 
367   // The following functions are available on at least Linux:
368   if (!T.isOSLinux()) {
369     TLI.setUnavailable(LibFunc::dunder_strdup);
370     TLI.setUnavailable(LibFunc::dunder_strtok_r);
371     TLI.setUnavailable(LibFunc::dunder_isoc99_scanf);
372     TLI.setUnavailable(LibFunc::dunder_isoc99_sscanf);
373     TLI.setUnavailable(LibFunc::under_IO_getc);
374     TLI.setUnavailable(LibFunc::under_IO_putc);
375     TLI.setUnavailable(LibFunc::memalign);
376     TLI.setUnavailable(LibFunc::fopen64);
377     TLI.setUnavailable(LibFunc::fseeko64);
378     TLI.setUnavailable(LibFunc::fstat64);
379     TLI.setUnavailable(LibFunc::fstatvfs64);
380     TLI.setUnavailable(LibFunc::ftello64);
381     TLI.setUnavailable(LibFunc::lstat64);
382     TLI.setUnavailable(LibFunc::open64);
383     TLI.setUnavailable(LibFunc::stat64);
384     TLI.setUnavailable(LibFunc::statvfs64);
385     TLI.setUnavailable(LibFunc::tmpfile64);
386   }
387 
388   // As currently implemented in clang, NVPTX code has no standard library to
389   // speak of.  Headers provide a standard-ish library implementation, but many
390   // of the signatures are wrong -- for example, many libm functions are not
391   // extern "C".
392   //
393   // libdevice, an IR library provided by nvidia, is linked in by the front-end,
394   // but only used functions are provided to llvm.  Moreover, most of the
395   // functions in libdevice don't map precisely to standard library functions.
396   //
397   // FIXME: Having no standard library prevents e.g. many fastmath
398   // optimizations, so this situation should be fixed.
399   if (T.isNVPTX()) {
400     TLI.disableAllFunctions();
401     TLI.setAvailable(LibFunc::nvvm_reflect);
402   } else {
403     TLI.setUnavailable(LibFunc::nvvm_reflect);
404   }
405 
406   TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
407 }
408 
409 TargetLibraryInfoImpl::TargetLibraryInfoImpl() {
410   // Default to everything being available.
411   memset(AvailableArray, -1, sizeof(AvailableArray));
412 
413   initialize(*this, Triple(), StandardNames);
414 }
415 
416 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) {
417   // Default to everything being available.
418   memset(AvailableArray, -1, sizeof(AvailableArray));
419 
420   initialize(*this, T, StandardNames);
421 }
422 
423 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI)
424     : CustomNames(TLI.CustomNames) {
425   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
426   VectorDescs = TLI.VectorDescs;
427   ScalarDescs = TLI.ScalarDescs;
428 }
429 
430 TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI)
431     : CustomNames(std::move(TLI.CustomNames)) {
432   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
433             AvailableArray);
434   VectorDescs = TLI.VectorDescs;
435   ScalarDescs = TLI.ScalarDescs;
436 }
437 
438 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) {
439   CustomNames = TLI.CustomNames;
440   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
441   return *this;
442 }
443 
444 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) {
445   CustomNames = std::move(TLI.CustomNames);
446   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
447             AvailableArray);
448   return *this;
449 }
450 
451 static StringRef sanitizeFunctionName(StringRef funcName) {
452   // Filter out empty names and names containing null bytes, those can't be in
453   // our table.
454   if (funcName.empty() || funcName.find('\0') != StringRef::npos)
455     return StringRef();
456 
457   // Check for \01 prefix that is used to mangle __asm declarations and
458   // strip it if present.
459   return GlobalValue::getRealLinkageName(funcName);
460 }
461 
462 bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName,
463                                        LibFunc::Func &F) const {
464   const char *const *Start = &StandardNames[0];
465   const char *const *End = &StandardNames[LibFunc::NumLibFuncs];
466 
467   funcName = sanitizeFunctionName(funcName);
468   if (funcName.empty())
469     return false;
470 
471   const char *const *I = std::lower_bound(
472       Start, End, funcName, [](const char *LHS, StringRef RHS) {
473         return std::strncmp(LHS, RHS.data(), RHS.size()) < 0;
474       });
475   if (I != End && *I == funcName) {
476     F = (LibFunc::Func)(I - Start);
477     return true;
478   }
479   return false;
480 }
481 
482 bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy,
483                                                    LibFunc::Func F,
484                                                    const DataLayout *DL) const {
485   LLVMContext &Ctx = FTy.getContext();
486   Type *PCharTy = Type::getInt8PtrTy(Ctx);
487   Type *SizeTTy = DL ? DL->getIntPtrType(Ctx, /*AS=*/0) : nullptr;
488   auto IsSizeTTy = [SizeTTy](Type *Ty) {
489     return SizeTTy ? Ty == SizeTTy : Ty->isIntegerTy();
490   };
491   unsigned NumParams = FTy.getNumParams();
492 
493   switch (F) {
494   case LibFunc::strlen:
495     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
496             FTy.getReturnType()->isIntegerTy());
497 
498   case LibFunc::strchr:
499   case LibFunc::strrchr:
500     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
501             FTy.getParamType(0) == FTy.getReturnType() &&
502             FTy.getParamType(1)->isIntegerTy());
503 
504   case LibFunc::strtol:
505   case LibFunc::strtod:
506   case LibFunc::strtof:
507   case LibFunc::strtoul:
508   case LibFunc::strtoll:
509   case LibFunc::strtold:
510   case LibFunc::strtoull:
511     return ((NumParams == 2 || NumParams == 3) &&
512             FTy.getParamType(0)->isPointerTy() &&
513             FTy.getParamType(1)->isPointerTy());
514   case LibFunc::strcat:
515     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
516             FTy.getParamType(0) == FTy.getReturnType() &&
517             FTy.getParamType(1) == FTy.getReturnType());
518 
519   case LibFunc::strncat:
520     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
521             FTy.getParamType(0) == FTy.getReturnType() &&
522             FTy.getParamType(1) == FTy.getReturnType() &&
523             FTy.getParamType(2)->isIntegerTy());
524 
525   case LibFunc::strcpy_chk:
526   case LibFunc::stpcpy_chk:
527     --NumParams;
528     if (!IsSizeTTy(FTy.getParamType(NumParams)))
529       return false;
530   // fallthrough
531   case LibFunc::strcpy:
532   case LibFunc::stpcpy:
533     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(0) &&
534             FTy.getParamType(0) == FTy.getParamType(1) &&
535             FTy.getParamType(0) == PCharTy);
536 
537   case LibFunc::strncpy_chk:
538   case LibFunc::stpncpy_chk:
539     --NumParams;
540     if (!IsSizeTTy(FTy.getParamType(NumParams)))
541       return false;
542   // fallthrough
543   case LibFunc::strncpy:
544   case LibFunc::stpncpy:
545     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
546             FTy.getParamType(0) == FTy.getParamType(1) &&
547             FTy.getParamType(0) == PCharTy &&
548             FTy.getParamType(2)->isIntegerTy());
549 
550   case LibFunc::strxfrm:
551     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
552             FTy.getParamType(1)->isPointerTy());
553 
554   case LibFunc::strcmp:
555     return (NumParams == 2 && FTy.getReturnType()->isIntegerTy(32) &&
556             FTy.getParamType(0)->isPointerTy() &&
557             FTy.getParamType(0) == FTy.getParamType(1));
558 
559   case LibFunc::strncmp:
560     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
561             FTy.getParamType(0)->isPointerTy() &&
562             FTy.getParamType(0) == FTy.getParamType(1) &&
563             FTy.getParamType(2)->isIntegerTy());
564 
565   case LibFunc::strspn:
566   case LibFunc::strcspn:
567     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
568             FTy.getParamType(0) == FTy.getParamType(1) &&
569             FTy.getReturnType()->isIntegerTy());
570 
571   case LibFunc::strcoll:
572   case LibFunc::strcasecmp:
573   case LibFunc::strncasecmp:
574     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
575             FTy.getParamType(1)->isPointerTy());
576 
577   case LibFunc::strstr:
578     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
579             FTy.getParamType(0)->isPointerTy() &&
580             FTy.getParamType(1)->isPointerTy());
581 
582   case LibFunc::strpbrk:
583     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
584             FTy.getReturnType() == FTy.getParamType(0) &&
585             FTy.getParamType(0) == FTy.getParamType(1));
586 
587   case LibFunc::strtok:
588   case LibFunc::strtok_r:
589     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
590   case LibFunc::scanf:
591     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
592   case LibFunc::setbuf:
593   case LibFunc::setvbuf:
594     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
595   case LibFunc::strdup:
596   case LibFunc::strndup:
597     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
598             FTy.getParamType(0)->isPointerTy());
599   case LibFunc::stat:
600   case LibFunc::statvfs:
601     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
602             FTy.getParamType(1)->isPointerTy());
603   case LibFunc::sscanf:
604     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
605             FTy.getParamType(1)->isPointerTy());
606   case LibFunc::sprintf:
607     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
608             FTy.getParamType(1)->isPointerTy());
609   case LibFunc::snprintf:
610     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
611             FTy.getParamType(2)->isPointerTy());
612   case LibFunc::setitimer:
613     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
614             FTy.getParamType(2)->isPointerTy());
615   case LibFunc::system:
616     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
617   case LibFunc::malloc:
618     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
619   case LibFunc::memcmp:
620     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
621             FTy.getParamType(1)->isPointerTy() &&
622             FTy.getReturnType()->isIntegerTy(32));
623 
624   case LibFunc::memchr:
625   case LibFunc::memrchr:
626     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
627             FTy.getParamType(1)->isIntegerTy(32) &&
628             FTy.getParamType(2)->isIntegerTy() &&
629             FTy.getReturnType()->isPointerTy());
630   case LibFunc::modf:
631   case LibFunc::modff:
632   case LibFunc::modfl:
633     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
634 
635   case LibFunc::memcpy_chk:
636   case LibFunc::memmove_chk:
637     --NumParams;
638     if (!IsSizeTTy(FTy.getParamType(NumParams)))
639       return false;
640   // fallthrough
641   case LibFunc::memcpy:
642   case LibFunc::memmove:
643     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
644             FTy.getParamType(0)->isPointerTy() &&
645             FTy.getParamType(1)->isPointerTy() &&
646             IsSizeTTy(FTy.getParamType(2)));
647 
648   case LibFunc::memset_chk:
649     --NumParams;
650     if (!IsSizeTTy(FTy.getParamType(NumParams)))
651       return false;
652   // fallthrough
653   case LibFunc::memset:
654     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
655             FTy.getParamType(0)->isPointerTy() &&
656             FTy.getParamType(1)->isIntegerTy() &&
657             IsSizeTTy(FTy.getParamType(2)));
658 
659   case LibFunc::memccpy:
660     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
661   case LibFunc::memalign:
662     return (FTy.getReturnType()->isPointerTy());
663   case LibFunc::mkdir:
664     return (NumParams == 0 && FTy.getParamType(0)->isPointerTy());
665   case LibFunc::mktime:
666     return (NumParams == 0 && FTy.getParamType(0)->isPointerTy());
667   case LibFunc::realloc:
668     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
669             FTy.getReturnType()->isPointerTy());
670   case LibFunc::read:
671     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
672   case LibFunc::rewind:
673     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
674   case LibFunc::rmdir:
675   case LibFunc::remove:
676   case LibFunc::realpath:
677     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
678   case LibFunc::rename:
679     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
680             FTy.getParamType(1)->isPointerTy());
681   case LibFunc::readlink:
682     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
683             FTy.getParamType(1)->isPointerTy());
684   case LibFunc::write:
685     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
686   case LibFunc::bcopy:
687     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
688             FTy.getParamType(1)->isPointerTy());
689   case LibFunc::bcmp:
690     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
691             FTy.getParamType(1)->isPointerTy());
692   case LibFunc::bzero:
693     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
694   case LibFunc::calloc:
695     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
696   case LibFunc::chmod:
697   case LibFunc::chown:
698     return (NumParams == 0 && FTy.getParamType(0)->isPointerTy());
699   case LibFunc::ctermid:
700   case LibFunc::clearerr:
701   case LibFunc::closedir:
702     return (NumParams == 0 && FTy.getParamType(0)->isPointerTy());
703   case LibFunc::atoi:
704   case LibFunc::atol:
705   case LibFunc::atof:
706   case LibFunc::atoll:
707     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
708   case LibFunc::access:
709     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
710   case LibFunc::fopen:
711     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
712             FTy.getParamType(0)->isPointerTy() &&
713             FTy.getParamType(1)->isPointerTy());
714   case LibFunc::fdopen:
715     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
716             FTy.getParamType(1)->isPointerTy());
717   case LibFunc::feof:
718   case LibFunc::free:
719   case LibFunc::fseek:
720   case LibFunc::ftell:
721   case LibFunc::fgetc:
722   case LibFunc::fseeko:
723   case LibFunc::ftello:
724   case LibFunc::fileno:
725   case LibFunc::fflush:
726   case LibFunc::fclose:
727   case LibFunc::fsetpos:
728   case LibFunc::flockfile:
729   case LibFunc::funlockfile:
730   case LibFunc::ftrylockfile:
731     return (NumParams == 0 && FTy.getParamType(0)->isPointerTy());
732   case LibFunc::ferror:
733     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
734   case LibFunc::fputc:
735   case LibFunc::fstat:
736   case LibFunc::frexp:
737   case LibFunc::frexpf:
738   case LibFunc::frexpl:
739   case LibFunc::fstatvfs:
740     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
741   case LibFunc::fgets:
742     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
743             FTy.getParamType(2)->isPointerTy());
744   case LibFunc::fread:
745     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
746             FTy.getParamType(3)->isPointerTy());
747   case LibFunc::fwrite:
748     return (NumParams == 4 && FTy.getReturnType()->isIntegerTy() &&
749             FTy.getParamType(0)->isPointerTy() &&
750             FTy.getParamType(1)->isIntegerTy() &&
751             FTy.getParamType(2)->isIntegerTy() &&
752             FTy.getParamType(3)->isPointerTy());
753   case LibFunc::fputs:
754     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
755             FTy.getParamType(1)->isPointerTy());
756   case LibFunc::fscanf:
757   case LibFunc::fprintf:
758     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
759             FTy.getParamType(1)->isPointerTy());
760   case LibFunc::fgetpos:
761     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
762             FTy.getParamType(1)->isPointerTy());
763   case LibFunc::getc:
764   case LibFunc::getlogin_r:
765   case LibFunc::getc_unlocked:
766     return (NumParams == 0 && FTy.getParamType(0)->isPointerTy());
767   case LibFunc::getenv:
768     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
769   case LibFunc::gets:
770   case LibFunc::getchar:
771   case LibFunc::getitimer:
772     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
773   case LibFunc::getpwnam:
774     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
775   case LibFunc::ungetc:
776     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
777   case LibFunc::uname:
778     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
779   case LibFunc::unlink:
780     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
781   case LibFunc::unsetenv:
782     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
783   case LibFunc::utime:
784   case LibFunc::utimes:
785     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
786             FTy.getParamType(1)->isPointerTy());
787   case LibFunc::putc:
788     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
789   case LibFunc::puts:
790   case LibFunc::printf:
791   case LibFunc::perror:
792     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
793   case LibFunc::pread:
794   case LibFunc::pwrite:
795     return (NumParams == 4 && FTy.getParamType(1)->isPointerTy());
796   case LibFunc::putchar:
797   case LibFunc::popen:
798     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
799             FTy.getParamType(0)->isPointerTy() &&
800             FTy.getParamType(1)->isPointerTy());
801   case LibFunc::pclose:
802     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
803   case LibFunc::vscanf:
804     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
805   case LibFunc::vsscanf:
806     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
807             FTy.getParamType(2)->isPointerTy());
808   case LibFunc::vfscanf:
809     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
810             FTy.getParamType(2)->isPointerTy());
811   case LibFunc::valloc:
812     return (FTy.getReturnType()->isPointerTy());
813   case LibFunc::vprintf:
814     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
815   case LibFunc::vfprintf:
816   case LibFunc::vsprintf:
817     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
818             FTy.getParamType(1)->isPointerTy());
819   case LibFunc::vsnprintf:
820     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
821             FTy.getParamType(2)->isPointerTy());
822   case LibFunc::open:
823     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
824   case LibFunc::opendir:
825     return (NumParams == 1 && FTy.getReturnType()->isPointerTy() &&
826             FTy.getParamType(0)->isPointerTy());
827   case LibFunc::tmpfile:
828     return (FTy.getReturnType()->isPointerTy());
829   case LibFunc::times:
830     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
831   case LibFunc::htonl:
832   case LibFunc::htons:
833   case LibFunc::ntohl:
834   case LibFunc::ntohs:
835   case LibFunc::lstat:
836     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
837             FTy.getParamType(1)->isPointerTy());
838   case LibFunc::lchown:
839     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
840   case LibFunc::qsort:
841     return (NumParams == 4 && FTy.getParamType(3)->isPointerTy());
842   case LibFunc::dunder_strdup:
843   case LibFunc::dunder_strndup:
844     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
845             FTy.getParamType(0)->isPointerTy());
846   case LibFunc::dunder_strtok_r:
847     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
848   case LibFunc::under_IO_getc:
849     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
850   case LibFunc::under_IO_putc:
851     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
852   case LibFunc::dunder_isoc99_scanf:
853     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
854   case LibFunc::stat64:
855   case LibFunc::lstat64:
856   case LibFunc::statvfs64:
857     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy() &&
858             FTy.getParamType(1)->isPointerTy());
859   case LibFunc::dunder_isoc99_sscanf:
860     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy() &&
861             FTy.getParamType(1)->isPointerTy());
862   case LibFunc::fopen64:
863     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
864             FTy.getParamType(0)->isPointerTy() &&
865             FTy.getParamType(1)->isPointerTy());
866   case LibFunc::fseeko64:
867   case LibFunc::ftello64:
868     return (NumParams == 0 && FTy.getParamType(0)->isPointerTy());
869   case LibFunc::tmpfile64:
870     return (FTy.getReturnType()->isPointerTy());
871   case LibFunc::fstat64:
872   case LibFunc::fstatvfs64:
873     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
874   case LibFunc::open64:
875     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
876   case LibFunc::gettimeofday:
877     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
878             FTy.getParamType(1)->isPointerTy());
879 
880   case LibFunc::Znwj:                    // new(unsigned int);
881   case LibFunc::Znwm:                    // new(unsigned long);
882   case LibFunc::Znaj:                    // new[](unsigned int);
883   case LibFunc::Znam:                    // new[](unsigned long);
884   case LibFunc::msvc_new_int:            // new(unsigned int);
885   case LibFunc::msvc_new_longlong:       // new(unsigned long long);
886   case LibFunc::msvc_new_array_int:      // new[](unsigned int);
887   case LibFunc::msvc_new_array_longlong: // new[](unsigned long long);
888     return (NumParams == 1);
889 
890   case LibFunc::memset_pattern16:
891     return (!FTy.isVarArg() && NumParams == 3 &&
892             isa<PointerType>(FTy.getParamType(0)) &&
893             isa<PointerType>(FTy.getParamType(1)) &&
894             isa<IntegerType>(FTy.getParamType(2)));
895 
896   // int __nvvm_reflect(const char *);
897   case LibFunc::nvvm_reflect:
898     return (NumParams == 1 && isa<PointerType>(FTy.getParamType(0)));
899 
900   case LibFunc::sin:
901   case LibFunc::sinf:
902   case LibFunc::sinl:
903   case LibFunc::cos:
904   case LibFunc::cosf:
905   case LibFunc::cosl:
906   case LibFunc::exp:
907   case LibFunc::expf:
908   case LibFunc::expl:
909   case LibFunc::exp2:
910   case LibFunc::exp2f:
911   case LibFunc::exp2l:
912   case LibFunc::log:
913   case LibFunc::logf:
914   case LibFunc::logl:
915   case LibFunc::log10:
916   case LibFunc::log10f:
917   case LibFunc::log10l:
918   case LibFunc::log2:
919   case LibFunc::log2f:
920   case LibFunc::log2l:
921   case LibFunc::fabs:
922   case LibFunc::fabsf:
923   case LibFunc::fabsl:
924   case LibFunc::floor:
925   case LibFunc::floorf:
926   case LibFunc::floorl:
927   case LibFunc::ceil:
928   case LibFunc::ceilf:
929   case LibFunc::ceill:
930   case LibFunc::trunc:
931   case LibFunc::truncf:
932   case LibFunc::truncl:
933   case LibFunc::rint:
934   case LibFunc::rintf:
935   case LibFunc::rintl:
936   case LibFunc::nearbyint:
937   case LibFunc::nearbyintf:
938   case LibFunc::nearbyintl:
939   case LibFunc::round:
940   case LibFunc::roundf:
941   case LibFunc::roundl:
942   case LibFunc::sqrt:
943   case LibFunc::sqrtf:
944   case LibFunc::sqrtl:
945     return (NumParams == 1 && FTy.getReturnType()->isFloatingPointTy() &&
946             FTy.getReturnType() == FTy.getParamType(0));
947 
948   case LibFunc::fmin:
949   case LibFunc::fminf:
950   case LibFunc::fminl:
951   case LibFunc::fmax:
952   case LibFunc::fmaxf:
953   case LibFunc::fmaxl:
954   case LibFunc::copysign:
955   case LibFunc::copysignf:
956   case LibFunc::copysignl:
957   case LibFunc::pow:
958   case LibFunc::powf:
959   case LibFunc::powl:
960     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
961             FTy.getReturnType() == FTy.getParamType(0) &&
962             FTy.getReturnType() == FTy.getParamType(1));
963 
964   case LibFunc::ffs:
965   case LibFunc::ffsl:
966   case LibFunc::ffsll:
967   case LibFunc::isdigit:
968   case LibFunc::isascii:
969   case LibFunc::toascii:
970     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
971             FTy.getParamType(0)->isIntegerTy());
972 
973   case LibFunc::fls:
974   case LibFunc::flsl:
975   case LibFunc::flsll:
976   case LibFunc::abs:
977   case LibFunc::labs:
978   case LibFunc::llabs:
979     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy() &&
980             FTy.getReturnType() == FTy.getParamType(0));
981 
982   case LibFunc::cxa_atexit:
983     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy() &&
984             FTy.getParamType(0)->isPointerTy() &&
985             FTy.getParamType(1)->isPointerTy() &&
986             FTy.getParamType(2)->isPointerTy());
987 
988   case LibFunc::sinpi:
989   case LibFunc::cospi:
990     return (NumParams == 1 && FTy.getReturnType()->isDoubleTy() &&
991             FTy.getReturnType() == FTy.getParamType(0));
992 
993   case LibFunc::sinpif:
994   case LibFunc::cospif:
995     return (NumParams == 1 && FTy.getReturnType()->isFloatTy() &&
996             FTy.getReturnType() == FTy.getParamType(0));
997 
998   default:
999     // Assume the other functions are correct.
1000     // FIXME: It'd be really nice to cover them all.
1001     return true;
1002   }
1003 }
1004 
1005 bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl,
1006                                        LibFunc::Func &F) const {
1007   const DataLayout *DL =
1008       FDecl.getParent() ? &FDecl.getParent()->getDataLayout() : nullptr;
1009   return getLibFunc(FDecl.getName(), F) &&
1010          isValidProtoForLibFunc(*FDecl.getFunctionType(), F, DL);
1011 }
1012 
1013 void TargetLibraryInfoImpl::disableAllFunctions() {
1014   memset(AvailableArray, 0, sizeof(AvailableArray));
1015 }
1016 
1017 static bool compareByScalarFnName(const VecDesc &LHS, const VecDesc &RHS) {
1018   return std::strncmp(LHS.ScalarFnName, RHS.ScalarFnName,
1019                       std::strlen(RHS.ScalarFnName)) < 0;
1020 }
1021 
1022 static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) {
1023   return std::strncmp(LHS.VectorFnName, RHS.VectorFnName,
1024                       std::strlen(RHS.VectorFnName)) < 0;
1025 }
1026 
1027 static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) {
1028   return std::strncmp(LHS.ScalarFnName, S.data(), S.size()) < 0;
1029 }
1030 
1031 static bool compareWithVectorFnName(const VecDesc &LHS, StringRef S) {
1032   return std::strncmp(LHS.VectorFnName, S.data(), S.size()) < 0;
1033 }
1034 
1035 void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) {
1036   VectorDescs.insert(VectorDescs.end(), Fns.begin(), Fns.end());
1037   std::sort(VectorDescs.begin(), VectorDescs.end(), compareByScalarFnName);
1038 
1039   ScalarDescs.insert(ScalarDescs.end(), Fns.begin(), Fns.end());
1040   std::sort(ScalarDescs.begin(), ScalarDescs.end(), compareByVectorFnName);
1041 }
1042 
1043 void TargetLibraryInfoImpl::addVectorizableFunctionsFromVecLib(
1044     enum VectorLibrary VecLib) {
1045   switch (VecLib) {
1046   case Accelerate: {
1047     const VecDesc VecFuncs[] = {
1048         // Floating-Point Arithmetic and Auxiliary Functions
1049         {"ceilf", "vceilf", 4},
1050         {"fabsf", "vfabsf", 4},
1051         {"llvm.fabs.f32", "vfabsf", 4},
1052         {"floorf", "vfloorf", 4},
1053         {"sqrtf", "vsqrtf", 4},
1054         {"llvm.sqrt.f32", "vsqrtf", 4},
1055 
1056         // Exponential and Logarithmic Functions
1057         {"expf", "vexpf", 4},
1058         {"llvm.exp.f32", "vexpf", 4},
1059         {"expm1f", "vexpm1f", 4},
1060         {"logf", "vlogf", 4},
1061         {"llvm.log.f32", "vlogf", 4},
1062         {"log1pf", "vlog1pf", 4},
1063         {"log10f", "vlog10f", 4},
1064         {"llvm.log10.f32", "vlog10f", 4},
1065         {"logbf", "vlogbf", 4},
1066 
1067         // Trigonometric Functions
1068         {"sinf", "vsinf", 4},
1069         {"llvm.sin.f32", "vsinf", 4},
1070         {"cosf", "vcosf", 4},
1071         {"llvm.cos.f32", "vcosf", 4},
1072         {"tanf", "vtanf", 4},
1073         {"asinf", "vasinf", 4},
1074         {"acosf", "vacosf", 4},
1075         {"atanf", "vatanf", 4},
1076 
1077         // Hyperbolic Functions
1078         {"sinhf", "vsinhf", 4},
1079         {"coshf", "vcoshf", 4},
1080         {"tanhf", "vtanhf", 4},
1081         {"asinhf", "vasinhf", 4},
1082         {"acoshf", "vacoshf", 4},
1083         {"atanhf", "vatanhf", 4},
1084     };
1085     addVectorizableFunctions(VecFuncs);
1086     break;
1087   }
1088   case NoLibrary:
1089     break;
1090   }
1091 }
1092 
1093 bool TargetLibraryInfoImpl::isFunctionVectorizable(StringRef funcName) const {
1094   funcName = sanitizeFunctionName(funcName);
1095   if (funcName.empty())
1096     return false;
1097 
1098   std::vector<VecDesc>::const_iterator I = std::lower_bound(
1099       VectorDescs.begin(), VectorDescs.end(), funcName,
1100       compareWithScalarFnName);
1101   return I != VectorDescs.end() && StringRef(I->ScalarFnName) == funcName;
1102 }
1103 
1104 StringRef TargetLibraryInfoImpl::getVectorizedFunction(StringRef F,
1105                                                        unsigned VF) const {
1106   F = sanitizeFunctionName(F);
1107   if (F.empty())
1108     return F;
1109   std::vector<VecDesc>::const_iterator I = std::lower_bound(
1110       VectorDescs.begin(), VectorDescs.end(), F, compareWithScalarFnName);
1111   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == F) {
1112     if (I->VectorizationFactor == VF)
1113       return I->VectorFnName;
1114     ++I;
1115   }
1116   return StringRef();
1117 }
1118 
1119 StringRef TargetLibraryInfoImpl::getScalarizedFunction(StringRef F,
1120                                                        unsigned &VF) const {
1121   F = sanitizeFunctionName(F);
1122   if (F.empty())
1123     return F;
1124 
1125   std::vector<VecDesc>::const_iterator I = std::lower_bound(
1126       ScalarDescs.begin(), ScalarDescs.end(), F, compareWithVectorFnName);
1127   if (I == VectorDescs.end() || StringRef(I->VectorFnName) != F)
1128     return StringRef();
1129   VF = I->VectorizationFactor;
1130   return I->ScalarFnName;
1131 }
1132 
1133 TargetLibraryInfo TargetLibraryAnalysis::run(Module &M) {
1134   if (PresetInfoImpl)
1135     return TargetLibraryInfo(*PresetInfoImpl);
1136 
1137   return TargetLibraryInfo(lookupInfoImpl(Triple(M.getTargetTriple())));
1138 }
1139 
1140 TargetLibraryInfo TargetLibraryAnalysis::run(Function &F) {
1141   if (PresetInfoImpl)
1142     return TargetLibraryInfo(*PresetInfoImpl);
1143 
1144   return TargetLibraryInfo(
1145       lookupInfoImpl(Triple(F.getParent()->getTargetTriple())));
1146 }
1147 
1148 TargetLibraryInfoImpl &TargetLibraryAnalysis::lookupInfoImpl(Triple T) {
1149   std::unique_ptr<TargetLibraryInfoImpl> &Impl =
1150       Impls[T.normalize()];
1151   if (!Impl)
1152     Impl.reset(new TargetLibraryInfoImpl(T));
1153 
1154   return *Impl;
1155 }
1156 
1157 
1158 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass()
1159     : ImmutablePass(ID), TLIImpl(), TLI(TLIImpl) {
1160   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1161 }
1162 
1163 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T)
1164     : ImmutablePass(ID), TLIImpl(T), TLI(TLIImpl) {
1165   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1166 }
1167 
1168 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(
1169     const TargetLibraryInfoImpl &TLIImpl)
1170     : ImmutablePass(ID), TLIImpl(TLIImpl), TLI(this->TLIImpl) {
1171   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1172 }
1173 
1174 char TargetLibraryAnalysis::PassID;
1175 
1176 // Register the basic pass.
1177 INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo",
1178                 "Target Library Information", false, true)
1179 char TargetLibraryInfoWrapperPass::ID = 0;
1180 
1181 void TargetLibraryInfoWrapperPass::anchor() {}
1182