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