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/IR/Constants.h"
17 #include "llvm/Support/CommandLine.h"
18 using namespace llvm;
19 
20 static cl::opt<TargetLibraryInfoImpl::VectorLibrary> ClVectorLibrary(
21     "vector-library", cl::Hidden, cl::desc("Vector functions library"),
22     cl::init(TargetLibraryInfoImpl::NoLibrary),
23     cl::values(clEnumValN(TargetLibraryInfoImpl::NoLibrary, "none",
24                           "No vector functions library"),
25                clEnumValN(TargetLibraryInfoImpl::Accelerate, "Accelerate",
26                           "Accelerate framework"),
27                clEnumValN(TargetLibraryInfoImpl::SVML, "SVML",
28                           "Intel SVML library")));
29 
30 StringRef const TargetLibraryInfoImpl::StandardNames[LibFunc::NumLibFuncs] = {
31 #define TLI_DEFINE_STRING
32 #include "llvm/Analysis/TargetLibraryInfo.def"
33 };
34 
35 static bool hasSinCosPiStret(const Triple &T) {
36   // Only Darwin variants have _stret versions of combined trig functions.
37   if (!T.isOSDarwin())
38     return false;
39 
40   // The ABI is rather complicated on x86, so don't do anything special there.
41   if (T.getArch() == Triple::x86)
42     return false;
43 
44   if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
45     return false;
46 
47   if (T.isiOS() && T.isOSVersionLT(7, 0))
48     return false;
49 
50   return true;
51 }
52 
53 /// Initialize the set of available library functions based on the specified
54 /// target triple. This should be carefully written so that a missing target
55 /// triple gets a sane set of defaults.
56 static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
57                        ArrayRef<StringRef> StandardNames) {
58   // Verify that the StandardNames array is in alphabetical order.
59   assert(std::is_sorted(StandardNames.begin(), StandardNames.end(),
60                         [](StringRef LHS, StringRef RHS) {
61                           return LHS < RHS;
62                         }) &&
63          "TargetLibraryInfoImpl function names must be sorted");
64 
65   bool ShouldExtI32Param = false, ShouldExtI32Return = false,
66        ShouldSignExtI32Param = false;
67   // PowerPC64, Sparc64, SystemZ need signext/zeroext on i32 parameters and
68   // returns corresponding to C-level ints and unsigned ints.
69   if (T.getArch() == Triple::ppc64 || T.getArch() == Triple::ppc64le ||
70       T.getArch() == Triple::sparcv9 || T.getArch() == Triple::systemz) {
71     ShouldExtI32Param = true;
72     ShouldExtI32Return = true;
73   }
74   // Mips, on the other hand, needs signext on i32 parameters corresponding
75   // to both signed and unsigned ints.
76   if (T.getArch() == Triple::mips || T.getArch() == Triple::mipsel ||
77       T.getArch() == Triple::mips64 || T.getArch() == Triple::mips64el) {
78     ShouldSignExtI32Param = true;
79   }
80   TLI.setShouldExtI32Param(ShouldExtI32Param);
81   TLI.setShouldExtI32Return(ShouldExtI32Return);
82   TLI.setShouldSignExtI32Param(ShouldSignExtI32Param);
83 
84   if (T.getArch() == Triple::r600 ||
85       T.getArch() == Triple::amdgcn) {
86     TLI.setUnavailable(LibFunc_ldexp);
87     TLI.setUnavailable(LibFunc_ldexpf);
88     TLI.setUnavailable(LibFunc_ldexpl);
89     TLI.setUnavailable(LibFunc_exp10);
90     TLI.setUnavailable(LibFunc_exp10f);
91     TLI.setUnavailable(LibFunc_exp10l);
92     TLI.setUnavailable(LibFunc_log10);
93     TLI.setUnavailable(LibFunc_log10f);
94     TLI.setUnavailable(LibFunc_log10l);
95   }
96 
97   // There are no library implementations of mempcy and memset for AMD gpus and
98   // these can be difficult to lower in the backend.
99   if (T.getArch() == Triple::r600 ||
100       T.getArch() == Triple::amdgcn) {
101     TLI.setUnavailable(LibFunc_memcpy);
102     TLI.setUnavailable(LibFunc_memset);
103     TLI.setUnavailable(LibFunc_memset_pattern16);
104     return;
105   }
106 
107   // memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
108   // All versions of watchOS support it.
109   if (T.isMacOSX()) {
110     if (T.isMacOSXVersionLT(10, 5))
111       TLI.setUnavailable(LibFunc_memset_pattern16);
112   } else if (T.isiOS()) {
113     if (T.isOSVersionLT(3, 0))
114       TLI.setUnavailable(LibFunc_memset_pattern16);
115   } else if (!T.isWatchOS()) {
116     TLI.setUnavailable(LibFunc_memset_pattern16);
117   }
118 
119   if (!hasSinCosPiStret(T)) {
120     TLI.setUnavailable(LibFunc_sinpi);
121     TLI.setUnavailable(LibFunc_sinpif);
122     TLI.setUnavailable(LibFunc_cospi);
123     TLI.setUnavailable(LibFunc_cospif);
124     TLI.setUnavailable(LibFunc_sincospi_stret);
125     TLI.setUnavailable(LibFunc_sincospif_stret);
126   }
127 
128   if (T.isMacOSX() && T.getArch() == Triple::x86 &&
129       !T.isMacOSXVersionLT(10, 7)) {
130     // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
131     // we don't care about) have two versions; on recent OSX, the one we want
132     // has a $UNIX2003 suffix. The two implementations are identical except
133     // for the return value in some edge cases.  However, we don't want to
134     // generate code that depends on the old symbols.
135     TLI.setAvailableWithName(LibFunc_fwrite, "fwrite$UNIX2003");
136     TLI.setAvailableWithName(LibFunc_fputs, "fputs$UNIX2003");
137   }
138 
139   // iprintf and friends are only available on XCore and TCE.
140   if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
141     TLI.setUnavailable(LibFunc_iprintf);
142     TLI.setUnavailable(LibFunc_siprintf);
143     TLI.setUnavailable(LibFunc_fiprintf);
144   }
145 
146   if (T.isOSWindows() && !T.isOSCygMing()) {
147     // Win32 does not support long double
148     TLI.setUnavailable(LibFunc_acosl);
149     TLI.setUnavailable(LibFunc_asinl);
150     TLI.setUnavailable(LibFunc_atanl);
151     TLI.setUnavailable(LibFunc_atan2l);
152     TLI.setUnavailable(LibFunc_ceill);
153     TLI.setUnavailable(LibFunc_copysignl);
154     TLI.setUnavailable(LibFunc_cosl);
155     TLI.setUnavailable(LibFunc_coshl);
156     TLI.setUnavailable(LibFunc_expl);
157     TLI.setUnavailable(LibFunc_fabsf); // Win32 and Win64 both lack fabsf
158     TLI.setUnavailable(LibFunc_fabsl);
159     TLI.setUnavailable(LibFunc_floorl);
160     TLI.setUnavailable(LibFunc_fmaxl);
161     TLI.setUnavailable(LibFunc_fminl);
162     TLI.setUnavailable(LibFunc_fmodl);
163     TLI.setUnavailable(LibFunc_frexpl);
164     TLI.setUnavailable(LibFunc_ldexpf);
165     TLI.setUnavailable(LibFunc_ldexpl);
166     TLI.setUnavailable(LibFunc_logl);
167     TLI.setUnavailable(LibFunc_modfl);
168     TLI.setUnavailable(LibFunc_powl);
169     TLI.setUnavailable(LibFunc_sinl);
170     TLI.setUnavailable(LibFunc_sinhl);
171     TLI.setUnavailable(LibFunc_sqrtl);
172     TLI.setUnavailable(LibFunc_tanl);
173     TLI.setUnavailable(LibFunc_tanhl);
174 
175     // Win32 only has C89 math
176     TLI.setUnavailable(LibFunc_acosh);
177     TLI.setUnavailable(LibFunc_acoshf);
178     TLI.setUnavailable(LibFunc_acoshl);
179     TLI.setUnavailable(LibFunc_asinh);
180     TLI.setUnavailable(LibFunc_asinhf);
181     TLI.setUnavailable(LibFunc_asinhl);
182     TLI.setUnavailable(LibFunc_atanh);
183     TLI.setUnavailable(LibFunc_atanhf);
184     TLI.setUnavailable(LibFunc_atanhl);
185     TLI.setUnavailable(LibFunc_cabs);
186     TLI.setUnavailable(LibFunc_cabsf);
187     TLI.setUnavailable(LibFunc_cabsl);
188     TLI.setUnavailable(LibFunc_cbrt);
189     TLI.setUnavailable(LibFunc_cbrtf);
190     TLI.setUnavailable(LibFunc_cbrtl);
191     TLI.setUnavailable(LibFunc_exp2);
192     TLI.setUnavailable(LibFunc_exp2f);
193     TLI.setUnavailable(LibFunc_exp2l);
194     TLI.setUnavailable(LibFunc_expm1);
195     TLI.setUnavailable(LibFunc_expm1f);
196     TLI.setUnavailable(LibFunc_expm1l);
197     TLI.setUnavailable(LibFunc_log2);
198     TLI.setUnavailable(LibFunc_log2f);
199     TLI.setUnavailable(LibFunc_log2l);
200     TLI.setUnavailable(LibFunc_log1p);
201     TLI.setUnavailable(LibFunc_log1pf);
202     TLI.setUnavailable(LibFunc_log1pl);
203     TLI.setUnavailable(LibFunc_logb);
204     TLI.setUnavailable(LibFunc_logbf);
205     TLI.setUnavailable(LibFunc_logbl);
206     TLI.setUnavailable(LibFunc_nearbyint);
207     TLI.setUnavailable(LibFunc_nearbyintf);
208     TLI.setUnavailable(LibFunc_nearbyintl);
209     TLI.setUnavailable(LibFunc_rint);
210     TLI.setUnavailable(LibFunc_rintf);
211     TLI.setUnavailable(LibFunc_rintl);
212     TLI.setUnavailable(LibFunc_round);
213     TLI.setUnavailable(LibFunc_roundf);
214     TLI.setUnavailable(LibFunc_roundl);
215     TLI.setUnavailable(LibFunc_trunc);
216     TLI.setUnavailable(LibFunc_truncf);
217     TLI.setUnavailable(LibFunc_truncl);
218 
219     // Win32 provides some C99 math with mangled names
220     TLI.setAvailableWithName(LibFunc_copysign, "_copysign");
221 
222     if (T.getArch() == Triple::x86) {
223       // Win32 on x86 implements single-precision math functions as macros
224       TLI.setUnavailable(LibFunc_acosf);
225       TLI.setUnavailable(LibFunc_asinf);
226       TLI.setUnavailable(LibFunc_atanf);
227       TLI.setUnavailable(LibFunc_atan2f);
228       TLI.setUnavailable(LibFunc_ceilf);
229       TLI.setUnavailable(LibFunc_copysignf);
230       TLI.setUnavailable(LibFunc_cosf);
231       TLI.setUnavailable(LibFunc_coshf);
232       TLI.setUnavailable(LibFunc_expf);
233       TLI.setUnavailable(LibFunc_floorf);
234       TLI.setUnavailable(LibFunc_fminf);
235       TLI.setUnavailable(LibFunc_fmaxf);
236       TLI.setUnavailable(LibFunc_fmodf);
237       TLI.setUnavailable(LibFunc_logf);
238       TLI.setUnavailable(LibFunc_log10f);
239       TLI.setUnavailable(LibFunc_modff);
240       TLI.setUnavailable(LibFunc_powf);
241       TLI.setUnavailable(LibFunc_sinf);
242       TLI.setUnavailable(LibFunc_sinhf);
243       TLI.setUnavailable(LibFunc_sqrtf);
244       TLI.setUnavailable(LibFunc_tanf);
245       TLI.setUnavailable(LibFunc_tanhf);
246     }
247 
248     // Win32 does *not* provide provide these functions, but they are
249     // generally available on POSIX-compliant systems:
250     TLI.setUnavailable(LibFunc_access);
251     TLI.setUnavailable(LibFunc_bcmp);
252     TLI.setUnavailable(LibFunc_bcopy);
253     TLI.setUnavailable(LibFunc_bzero);
254     TLI.setUnavailable(LibFunc_chmod);
255     TLI.setUnavailable(LibFunc_chown);
256     TLI.setUnavailable(LibFunc_closedir);
257     TLI.setUnavailable(LibFunc_ctermid);
258     TLI.setUnavailable(LibFunc_fdopen);
259     TLI.setUnavailable(LibFunc_ffs);
260     TLI.setUnavailable(LibFunc_fileno);
261     TLI.setUnavailable(LibFunc_flockfile);
262     TLI.setUnavailable(LibFunc_fseeko);
263     TLI.setUnavailable(LibFunc_fstat);
264     TLI.setUnavailable(LibFunc_fstatvfs);
265     TLI.setUnavailable(LibFunc_ftello);
266     TLI.setUnavailable(LibFunc_ftrylockfile);
267     TLI.setUnavailable(LibFunc_funlockfile);
268     TLI.setUnavailable(LibFunc_getc_unlocked);
269     TLI.setUnavailable(LibFunc_getitimer);
270     TLI.setUnavailable(LibFunc_getlogin_r);
271     TLI.setUnavailable(LibFunc_getpwnam);
272     TLI.setUnavailable(LibFunc_gettimeofday);
273     TLI.setUnavailable(LibFunc_htonl);
274     TLI.setUnavailable(LibFunc_htons);
275     TLI.setUnavailable(LibFunc_lchown);
276     TLI.setUnavailable(LibFunc_lstat);
277     TLI.setUnavailable(LibFunc_memccpy);
278     TLI.setUnavailable(LibFunc_mkdir);
279     TLI.setUnavailable(LibFunc_ntohl);
280     TLI.setUnavailable(LibFunc_ntohs);
281     TLI.setUnavailable(LibFunc_open);
282     TLI.setUnavailable(LibFunc_opendir);
283     TLI.setUnavailable(LibFunc_pclose);
284     TLI.setUnavailable(LibFunc_popen);
285     TLI.setUnavailable(LibFunc_pread);
286     TLI.setUnavailable(LibFunc_pwrite);
287     TLI.setUnavailable(LibFunc_read);
288     TLI.setUnavailable(LibFunc_readlink);
289     TLI.setUnavailable(LibFunc_realpath);
290     TLI.setUnavailable(LibFunc_rmdir);
291     TLI.setUnavailable(LibFunc_setitimer);
292     TLI.setUnavailable(LibFunc_stat);
293     TLI.setUnavailable(LibFunc_statvfs);
294     TLI.setUnavailable(LibFunc_stpcpy);
295     TLI.setUnavailable(LibFunc_stpncpy);
296     TLI.setUnavailable(LibFunc_strcasecmp);
297     TLI.setUnavailable(LibFunc_strncasecmp);
298     TLI.setUnavailable(LibFunc_times);
299     TLI.setUnavailable(LibFunc_uname);
300     TLI.setUnavailable(LibFunc_unlink);
301     TLI.setUnavailable(LibFunc_unsetenv);
302     TLI.setUnavailable(LibFunc_utime);
303     TLI.setUnavailable(LibFunc_utimes);
304     TLI.setUnavailable(LibFunc_write);
305 
306     // Win32 does *not* provide provide these functions, but they are
307     // specified by C99:
308     TLI.setUnavailable(LibFunc_atoll);
309     TLI.setUnavailable(LibFunc_frexpf);
310     TLI.setUnavailable(LibFunc_llabs);
311   }
312 
313   switch (T.getOS()) {
314   case Triple::MacOSX:
315     // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0
316     // and their names are __exp10 and __exp10f. exp10l is not available on
317     // OS X or iOS.
318     TLI.setUnavailable(LibFunc_exp10l);
319     if (T.isMacOSXVersionLT(10, 9)) {
320       TLI.setUnavailable(LibFunc_exp10);
321       TLI.setUnavailable(LibFunc_exp10f);
322     } else {
323       TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
324       TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
325     }
326     break;
327   case Triple::IOS:
328   case Triple::TvOS:
329   case Triple::WatchOS:
330     TLI.setUnavailable(LibFunc_exp10l);
331     if (!T.isWatchOS() && (T.isOSVersionLT(7, 0) ||
332                            (T.isOSVersionLT(9, 0) &&
333                             (T.getArch() == Triple::x86 ||
334                              T.getArch() == Triple::x86_64)))) {
335       TLI.setUnavailable(LibFunc_exp10);
336       TLI.setUnavailable(LibFunc_exp10f);
337     } else {
338       TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
339       TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
340     }
341     break;
342   case Triple::Linux:
343     // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
344     // buggy prior to glibc version 2.18. Until this version is widely deployed
345     // or we have a reasonable detection strategy, we cannot use exp10 reliably
346     // on Linux.
347     //
348     // Fall through to disable all of them.
349     LLVM_FALLTHROUGH;
350   default:
351     TLI.setUnavailable(LibFunc_exp10);
352     TLI.setUnavailable(LibFunc_exp10f);
353     TLI.setUnavailable(LibFunc_exp10l);
354   }
355 
356   // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
357   // Linux (GLIBC):
358   // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
359   // http://svn.freebsd.org/base/head/lib/libc/string/ffsl.c
360   // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
361   switch (T.getOS()) {
362   case Triple::Darwin:
363   case Triple::MacOSX:
364   case Triple::IOS:
365   case Triple::TvOS:
366   case Triple::WatchOS:
367   case Triple::FreeBSD:
368   case Triple::Linux:
369     break;
370   default:
371     TLI.setUnavailable(LibFunc_ffsl);
372   }
373 
374   // ffsll is available on at least FreeBSD and Linux (GLIBC):
375   // http://svn.freebsd.org/base/head/lib/libc/string/ffsll.c
376   // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
377   switch (T.getOS()) {
378   case Triple::Darwin:
379   case Triple::MacOSX:
380   case Triple::IOS:
381   case Triple::TvOS:
382   case Triple::WatchOS:
383   case Triple::FreeBSD:
384   case Triple::Linux:
385     break;
386   default:
387     TLI.setUnavailable(LibFunc_ffsll);
388   }
389 
390   // The following functions are available on at least FreeBSD:
391   // http://svn.freebsd.org/base/head/lib/libc/string/fls.c
392   // http://svn.freebsd.org/base/head/lib/libc/string/flsl.c
393   // http://svn.freebsd.org/base/head/lib/libc/string/flsll.c
394   if (!T.isOSFreeBSD()) {
395     TLI.setUnavailable(LibFunc_fls);
396     TLI.setUnavailable(LibFunc_flsl);
397     TLI.setUnavailable(LibFunc_flsll);
398   }
399 
400   // Android uses bionic instead of glibc. So disable some finite
401   // lib calls in glibc for Android. The list of unsupported lib
402   // calls for Android may expand as the need arises.
403   if (T.isAndroid()) {
404     TLI.setUnavailable(LibFunc_exp_finite);
405     TLI.setUnavailable(LibFunc_exp2_finite);
406     TLI.setUnavailable(LibFunc_pow_finite);
407   }
408 
409   // The following functions are available on at least Linux:
410   if (!T.isOSLinux()) {
411     TLI.setUnavailable(LibFunc_dunder_strdup);
412     TLI.setUnavailable(LibFunc_dunder_strtok_r);
413     TLI.setUnavailable(LibFunc_dunder_isoc99_scanf);
414     TLI.setUnavailable(LibFunc_dunder_isoc99_sscanf);
415     TLI.setUnavailable(LibFunc_under_IO_getc);
416     TLI.setUnavailable(LibFunc_under_IO_putc);
417     TLI.setUnavailable(LibFunc_memalign);
418     TLI.setUnavailable(LibFunc_fopen64);
419     TLI.setUnavailable(LibFunc_fseeko64);
420     TLI.setUnavailable(LibFunc_fstat64);
421     TLI.setUnavailable(LibFunc_fstatvfs64);
422     TLI.setUnavailable(LibFunc_ftello64);
423     TLI.setUnavailable(LibFunc_lstat64);
424     TLI.setUnavailable(LibFunc_open64);
425     TLI.setUnavailable(LibFunc_stat64);
426     TLI.setUnavailable(LibFunc_statvfs64);
427     TLI.setUnavailable(LibFunc_tmpfile64);
428 
429     // Relaxed math functions are included in math-finite.h on Linux (GLIBC).
430     TLI.setUnavailable(LibFunc_acos_finite);
431     TLI.setUnavailable(LibFunc_acosf_finite);
432     TLI.setUnavailable(LibFunc_acosl_finite);
433     TLI.setUnavailable(LibFunc_acosh_finite);
434     TLI.setUnavailable(LibFunc_acoshf_finite);
435     TLI.setUnavailable(LibFunc_acoshl_finite);
436     TLI.setUnavailable(LibFunc_asin_finite);
437     TLI.setUnavailable(LibFunc_asinf_finite);
438     TLI.setUnavailable(LibFunc_asinl_finite);
439     TLI.setUnavailable(LibFunc_atan2_finite);
440     TLI.setUnavailable(LibFunc_atan2f_finite);
441     TLI.setUnavailable(LibFunc_atan2l_finite);
442     TLI.setUnavailable(LibFunc_atanh_finite);
443     TLI.setUnavailable(LibFunc_atanhf_finite);
444     TLI.setUnavailable(LibFunc_atanhl_finite);
445     TLI.setUnavailable(LibFunc_cosh_finite);
446     TLI.setUnavailable(LibFunc_coshf_finite);
447     TLI.setUnavailable(LibFunc_coshl_finite);
448     TLI.setUnavailable(LibFunc_exp10_finite);
449     TLI.setUnavailable(LibFunc_exp10f_finite);
450     TLI.setUnavailable(LibFunc_exp10l_finite);
451     TLI.setUnavailable(LibFunc_exp2_finite);
452     TLI.setUnavailable(LibFunc_exp2f_finite);
453     TLI.setUnavailable(LibFunc_exp2l_finite);
454     TLI.setUnavailable(LibFunc_exp_finite);
455     TLI.setUnavailable(LibFunc_expf_finite);
456     TLI.setUnavailable(LibFunc_expl_finite);
457     TLI.setUnavailable(LibFunc_log10_finite);
458     TLI.setUnavailable(LibFunc_log10f_finite);
459     TLI.setUnavailable(LibFunc_log10l_finite);
460     TLI.setUnavailable(LibFunc_log2_finite);
461     TLI.setUnavailable(LibFunc_log2f_finite);
462     TLI.setUnavailable(LibFunc_log2l_finite);
463     TLI.setUnavailable(LibFunc_log_finite);
464     TLI.setUnavailable(LibFunc_logf_finite);
465     TLI.setUnavailable(LibFunc_logl_finite);
466     TLI.setUnavailable(LibFunc_pow_finite);
467     TLI.setUnavailable(LibFunc_powf_finite);
468     TLI.setUnavailable(LibFunc_powl_finite);
469     TLI.setUnavailable(LibFunc_sinh_finite);
470     TLI.setUnavailable(LibFunc_sinhf_finite);
471     TLI.setUnavailable(LibFunc_sinhl_finite);
472   }
473 
474   // As currently implemented in clang, NVPTX code has no standard library to
475   // speak of.  Headers provide a standard-ish library implementation, but many
476   // of the signatures are wrong -- for example, many libm functions are not
477   // extern "C".
478   //
479   // libdevice, an IR library provided by nvidia, is linked in by the front-end,
480   // but only used functions are provided to llvm.  Moreover, most of the
481   // functions in libdevice don't map precisely to standard library functions.
482   //
483   // FIXME: Having no standard library prevents e.g. many fastmath
484   // optimizations, so this situation should be fixed.
485   if (T.isNVPTX()) {
486     TLI.disableAllFunctions();
487     TLI.setAvailable(LibFunc_nvvm_reflect);
488   } else {
489     TLI.setUnavailable(LibFunc_nvvm_reflect);
490   }
491 
492   TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
493 }
494 
495 TargetLibraryInfoImpl::TargetLibraryInfoImpl() {
496   // Default to everything being available.
497   memset(AvailableArray, -1, sizeof(AvailableArray));
498 
499   initialize(*this, Triple(), StandardNames);
500 }
501 
502 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) {
503   // Default to everything being available.
504   memset(AvailableArray, -1, sizeof(AvailableArray));
505 
506   initialize(*this, T, StandardNames);
507 }
508 
509 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI)
510     : CustomNames(TLI.CustomNames), ShouldExtI32Param(TLI.ShouldExtI32Param),
511       ShouldExtI32Return(TLI.ShouldExtI32Return),
512       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param) {
513   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
514   VectorDescs = TLI.VectorDescs;
515   ScalarDescs = TLI.ScalarDescs;
516 }
517 
518 TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI)
519     : CustomNames(std::move(TLI.CustomNames)),
520       ShouldExtI32Param(TLI.ShouldExtI32Param),
521       ShouldExtI32Return(TLI.ShouldExtI32Return),
522       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param) {
523   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
524             AvailableArray);
525   VectorDescs = TLI.VectorDescs;
526   ScalarDescs = TLI.ScalarDescs;
527 }
528 
529 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) {
530   CustomNames = TLI.CustomNames;
531   ShouldExtI32Param = TLI.ShouldExtI32Param;
532   ShouldExtI32Return = TLI.ShouldExtI32Return;
533   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
534   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
535   return *this;
536 }
537 
538 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) {
539   CustomNames = std::move(TLI.CustomNames);
540   ShouldExtI32Param = TLI.ShouldExtI32Param;
541   ShouldExtI32Return = TLI.ShouldExtI32Return;
542   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
543   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
544             AvailableArray);
545   return *this;
546 }
547 
548 static StringRef sanitizeFunctionName(StringRef funcName) {
549   // Filter out empty names and names containing null bytes, those can't be in
550   // our table.
551   if (funcName.empty() || funcName.find('\0') != StringRef::npos)
552     return StringRef();
553 
554   // Check for \01 prefix that is used to mangle __asm declarations and
555   // strip it if present.
556   return GlobalValue::dropLLVMManglingEscape(funcName);
557 }
558 
559 bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName,
560                                        LibFunc &F) const {
561   StringRef const *Start = &StandardNames[0];
562   StringRef const *End = &StandardNames[NumLibFuncs];
563 
564   funcName = sanitizeFunctionName(funcName);
565   if (funcName.empty())
566     return false;
567 
568   StringRef const *I = std::lower_bound(
569       Start, End, funcName, [](StringRef LHS, StringRef RHS) {
570         return LHS < RHS;
571       });
572   if (I != End && *I == funcName) {
573     F = (LibFunc)(I - Start);
574     return true;
575   }
576   return false;
577 }
578 
579 bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy,
580                                                    LibFunc F,
581                                                    const DataLayout *DL) const {
582   LLVMContext &Ctx = FTy.getContext();
583   Type *PCharTy = Type::getInt8PtrTy(Ctx);
584   Type *SizeTTy = DL ? DL->getIntPtrType(Ctx, /*AS=*/0) : nullptr;
585   auto IsSizeTTy = [SizeTTy](Type *Ty) {
586     return SizeTTy ? Ty == SizeTTy : Ty->isIntegerTy();
587   };
588   unsigned NumParams = FTy.getNumParams();
589 
590   switch (F) {
591   case LibFunc_strlen:
592     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
593             FTy.getReturnType()->isIntegerTy());
594 
595   case LibFunc_strchr:
596   case LibFunc_strrchr:
597     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
598             FTy.getParamType(0) == FTy.getReturnType() &&
599             FTy.getParamType(1)->isIntegerTy());
600 
601   case LibFunc_strtol:
602   case LibFunc_strtod:
603   case LibFunc_strtof:
604   case LibFunc_strtoul:
605   case LibFunc_strtoll:
606   case LibFunc_strtold:
607   case LibFunc_strtoull:
608     return ((NumParams == 2 || NumParams == 3) &&
609             FTy.getParamType(0)->isPointerTy() &&
610             FTy.getParamType(1)->isPointerTy());
611   case LibFunc_strcat:
612     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
613             FTy.getParamType(0) == FTy.getReturnType() &&
614             FTy.getParamType(1) == FTy.getReturnType());
615 
616   case LibFunc_strncat:
617     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
618             FTy.getParamType(0) == FTy.getReturnType() &&
619             FTy.getParamType(1) == FTy.getReturnType() &&
620             IsSizeTTy(FTy.getParamType(2)));
621 
622   case LibFunc_strcpy_chk:
623   case LibFunc_stpcpy_chk:
624     --NumParams;
625     if (!IsSizeTTy(FTy.getParamType(NumParams)))
626       return false;
627     LLVM_FALLTHROUGH;
628   case LibFunc_strcpy:
629   case LibFunc_stpcpy:
630     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(0) &&
631             FTy.getParamType(0) == FTy.getParamType(1) &&
632             FTy.getParamType(0) == PCharTy);
633 
634   case LibFunc_strncpy_chk:
635   case LibFunc_stpncpy_chk:
636     --NumParams;
637     if (!IsSizeTTy(FTy.getParamType(NumParams)))
638       return false;
639     LLVM_FALLTHROUGH;
640   case LibFunc_strncpy:
641   case LibFunc_stpncpy:
642     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
643             FTy.getParamType(0) == FTy.getParamType(1) &&
644             FTy.getParamType(0) == PCharTy &&
645             IsSizeTTy(FTy.getParamType(2)));
646 
647   case LibFunc_strxfrm:
648     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
649             FTy.getParamType(1)->isPointerTy());
650 
651   case LibFunc_strcmp:
652     return (NumParams == 2 && FTy.getReturnType()->isIntegerTy(32) &&
653             FTy.getParamType(0)->isPointerTy() &&
654             FTy.getParamType(0) == FTy.getParamType(1));
655 
656   case LibFunc_strncmp:
657     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
658             FTy.getParamType(0)->isPointerTy() &&
659             FTy.getParamType(0) == FTy.getParamType(1) &&
660             IsSizeTTy(FTy.getParamType(2)));
661 
662   case LibFunc_strspn:
663   case LibFunc_strcspn:
664     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
665             FTy.getParamType(0) == FTy.getParamType(1) &&
666             FTy.getReturnType()->isIntegerTy());
667 
668   case LibFunc_strcoll:
669   case LibFunc_strcasecmp:
670   case LibFunc_strncasecmp:
671     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
672             FTy.getParamType(1)->isPointerTy());
673 
674   case LibFunc_strstr:
675     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
676             FTy.getParamType(0)->isPointerTy() &&
677             FTy.getParamType(1)->isPointerTy());
678 
679   case LibFunc_strpbrk:
680     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
681             FTy.getReturnType() == FTy.getParamType(0) &&
682             FTy.getParamType(0) == FTy.getParamType(1));
683 
684   case LibFunc_strtok:
685   case LibFunc_strtok_r:
686     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
687   case LibFunc_scanf:
688   case LibFunc_setbuf:
689   case LibFunc_setvbuf:
690     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
691   case LibFunc_strdup:
692   case LibFunc_strndup:
693     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
694             FTy.getParamType(0)->isPointerTy());
695   case LibFunc_sscanf:
696   case LibFunc_stat:
697   case LibFunc_statvfs:
698   case LibFunc_siprintf:
699   case LibFunc_sprintf:
700     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
701             FTy.getParamType(1)->isPointerTy());
702   case LibFunc_snprintf:
703     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
704             FTy.getParamType(2)->isPointerTy());
705   case LibFunc_setitimer:
706     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
707             FTy.getParamType(2)->isPointerTy());
708   case LibFunc_system:
709     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
710   case LibFunc_malloc:
711     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
712   case LibFunc_memcmp:
713     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
714             FTy.getParamType(0)->isPointerTy() &&
715             FTy.getParamType(1)->isPointerTy());
716 
717   case LibFunc_memchr:
718   case LibFunc_memrchr:
719     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
720             FTy.getReturnType() == FTy.getParamType(0) &&
721             FTy.getParamType(1)->isIntegerTy(32) &&
722             IsSizeTTy(FTy.getParamType(2)));
723   case LibFunc_modf:
724   case LibFunc_modff:
725   case LibFunc_modfl:
726     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
727 
728   case LibFunc_memcpy_chk:
729   case LibFunc_memmove_chk:
730     --NumParams;
731     if (!IsSizeTTy(FTy.getParamType(NumParams)))
732       return false;
733     LLVM_FALLTHROUGH;
734   case LibFunc_memcpy:
735   case LibFunc_mempcpy:
736   case LibFunc_memmove:
737     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
738             FTy.getParamType(0)->isPointerTy() &&
739             FTy.getParamType(1)->isPointerTy() &&
740             IsSizeTTy(FTy.getParamType(2)));
741 
742   case LibFunc_memset_chk:
743     --NumParams;
744     if (!IsSizeTTy(FTy.getParamType(NumParams)))
745       return false;
746     LLVM_FALLTHROUGH;
747   case LibFunc_memset:
748     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
749             FTy.getParamType(0)->isPointerTy() &&
750             FTy.getParamType(1)->isIntegerTy() &&
751             IsSizeTTy(FTy.getParamType(2)));
752 
753   case LibFunc_memccpy:
754     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
755   case LibFunc_memalign:
756     return (FTy.getReturnType()->isPointerTy());
757   case LibFunc_realloc:
758   case LibFunc_reallocf:
759     return (NumParams == 2 && FTy.getReturnType() == PCharTy &&
760             FTy.getParamType(0) == FTy.getReturnType() &&
761             IsSizeTTy(FTy.getParamType(1)));
762   case LibFunc_read:
763     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
764   case LibFunc_rewind:
765   case LibFunc_rmdir:
766   case LibFunc_remove:
767   case LibFunc_realpath:
768     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
769   case LibFunc_rename:
770     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
771             FTy.getParamType(1)->isPointerTy());
772   case LibFunc_readlink:
773     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
774             FTy.getParamType(1)->isPointerTy());
775   case LibFunc_write:
776     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
777   case LibFunc_bcopy:
778   case LibFunc_bcmp:
779     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
780             FTy.getParamType(1)->isPointerTy());
781   case LibFunc_bzero:
782     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
783   case LibFunc_calloc:
784     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
785 
786   case LibFunc_atof:
787   case LibFunc_atoi:
788   case LibFunc_atol:
789   case LibFunc_atoll:
790   case LibFunc_ferror:
791   case LibFunc_getenv:
792   case LibFunc_getpwnam:
793   case LibFunc_iprintf:
794   case LibFunc_pclose:
795   case LibFunc_perror:
796   case LibFunc_printf:
797   case LibFunc_puts:
798   case LibFunc_uname:
799   case LibFunc_under_IO_getc:
800   case LibFunc_unlink:
801   case LibFunc_unsetenv:
802     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
803 
804   case LibFunc_access:
805   case LibFunc_chmod:
806   case LibFunc_chown:
807   case LibFunc_clearerr:
808   case LibFunc_closedir:
809   case LibFunc_ctermid:
810   case LibFunc_fclose:
811   case LibFunc_feof:
812   case LibFunc_fflush:
813   case LibFunc_fgetc:
814   case LibFunc_fileno:
815   case LibFunc_flockfile:
816   case LibFunc_free:
817   case LibFunc_fseek:
818   case LibFunc_fseeko64:
819   case LibFunc_fseeko:
820   case LibFunc_fsetpos:
821   case LibFunc_ftell:
822   case LibFunc_ftello64:
823   case LibFunc_ftello:
824   case LibFunc_ftrylockfile:
825   case LibFunc_funlockfile:
826   case LibFunc_getc:
827   case LibFunc_getc_unlocked:
828   case LibFunc_getlogin_r:
829   case LibFunc_mkdir:
830   case LibFunc_mktime:
831   case LibFunc_times:
832     return (NumParams != 0 && FTy.getParamType(0)->isPointerTy());
833 
834   case LibFunc_fopen:
835     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
836             FTy.getParamType(0)->isPointerTy() &&
837             FTy.getParamType(1)->isPointerTy());
838   case LibFunc_fdopen:
839     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
840             FTy.getParamType(1)->isPointerTy());
841   case LibFunc_fputc:
842   case LibFunc_fstat:
843   case LibFunc_frexp:
844   case LibFunc_frexpf:
845   case LibFunc_frexpl:
846   case LibFunc_fstatvfs:
847     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
848   case LibFunc_fgets:
849     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
850             FTy.getParamType(2)->isPointerTy());
851   case LibFunc_fread:
852     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
853             FTy.getParamType(3)->isPointerTy());
854   case LibFunc_fwrite:
855     return (NumParams == 4 && FTy.getReturnType()->isIntegerTy() &&
856             FTy.getParamType(0)->isPointerTy() &&
857             FTy.getParamType(1)->isIntegerTy() &&
858             FTy.getParamType(2)->isIntegerTy() &&
859             FTy.getParamType(3)->isPointerTy());
860   case LibFunc_fputs:
861     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
862             FTy.getParamType(1)->isPointerTy());
863   case LibFunc_fscanf:
864   case LibFunc_fiprintf:
865   case LibFunc_fprintf:
866     return (NumParams >= 2 && FTy.getReturnType()->isIntegerTy() &&
867             FTy.getParamType(0)->isPointerTy() &&
868             FTy.getParamType(1)->isPointerTy());
869   case LibFunc_fgetpos:
870     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
871             FTy.getParamType(1)->isPointerTy());
872   case LibFunc_getchar:
873     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy());
874   case LibFunc_gets:
875     return (NumParams == 1 && FTy.getParamType(0) == PCharTy);
876   case LibFunc_getitimer:
877     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
878   case LibFunc_ungetc:
879     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
880   case LibFunc_utime:
881   case LibFunc_utimes:
882     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
883             FTy.getParamType(1)->isPointerTy());
884   case LibFunc_putc:
885     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
886   case LibFunc_pread:
887   case LibFunc_pwrite:
888     return (NumParams == 4 && FTy.getParamType(1)->isPointerTy());
889   case LibFunc_popen:
890     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
891             FTy.getParamType(0)->isPointerTy() &&
892             FTy.getParamType(1)->isPointerTy());
893   case LibFunc_vscanf:
894     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
895   case LibFunc_vsscanf:
896     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
897             FTy.getParamType(2)->isPointerTy());
898   case LibFunc_vfscanf:
899     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
900             FTy.getParamType(2)->isPointerTy());
901   case LibFunc_valloc:
902     return (FTy.getReturnType()->isPointerTy());
903   case LibFunc_vprintf:
904     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
905   case LibFunc_vfprintf:
906   case LibFunc_vsprintf:
907     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
908             FTy.getParamType(1)->isPointerTy());
909   case LibFunc_vsnprintf:
910     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
911             FTy.getParamType(2)->isPointerTy());
912   case LibFunc_open:
913     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
914   case LibFunc_opendir:
915     return (NumParams == 1 && FTy.getReturnType()->isPointerTy() &&
916             FTy.getParamType(0)->isPointerTy());
917   case LibFunc_tmpfile:
918     return (FTy.getReturnType()->isPointerTy());
919   case LibFunc_htonl:
920   case LibFunc_ntohl:
921     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
922             FTy.getReturnType() == FTy.getParamType(0));
923   case LibFunc_htons:
924   case LibFunc_ntohs:
925     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(16) &&
926             FTy.getReturnType() == FTy.getParamType(0));
927   case LibFunc_lstat:
928     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
929             FTy.getParamType(1)->isPointerTy());
930   case LibFunc_lchown:
931     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
932   case LibFunc_qsort:
933     return (NumParams == 4 && FTy.getParamType(3)->isPointerTy());
934   case LibFunc_dunder_strdup:
935   case LibFunc_dunder_strndup:
936     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
937             FTy.getParamType(0)->isPointerTy());
938   case LibFunc_dunder_strtok_r:
939     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
940   case LibFunc_under_IO_putc:
941     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
942   case LibFunc_dunder_isoc99_scanf:
943     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
944   case LibFunc_stat64:
945   case LibFunc_lstat64:
946   case LibFunc_statvfs64:
947     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
948             FTy.getParamType(1)->isPointerTy());
949   case LibFunc_dunder_isoc99_sscanf:
950     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
951             FTy.getParamType(1)->isPointerTy());
952   case LibFunc_fopen64:
953     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
954             FTy.getParamType(0)->isPointerTy() &&
955             FTy.getParamType(1)->isPointerTy());
956   case LibFunc_tmpfile64:
957     return (FTy.getReturnType()->isPointerTy());
958   case LibFunc_fstat64:
959   case LibFunc_fstatvfs64:
960     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
961   case LibFunc_open64:
962     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
963   case LibFunc_gettimeofday:
964     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
965             FTy.getParamType(1)->isPointerTy());
966 
967   // new(unsigned int);
968   case LibFunc_Znwj:
969   // new(unsigned long);
970   case LibFunc_Znwm:
971   // new[](unsigned int);
972   case LibFunc_Znaj:
973   // new[](unsigned long);
974   case LibFunc_Znam:
975   // new(unsigned int);
976   case LibFunc_msvc_new_int:
977   // new(unsigned long long);
978   case LibFunc_msvc_new_longlong:
979   // new[](unsigned int);
980   case LibFunc_msvc_new_array_int:
981   // new[](unsigned long long);
982   case LibFunc_msvc_new_array_longlong:
983     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
984 
985   // new(unsigned int, nothrow);
986   case LibFunc_ZnwjRKSt9nothrow_t:
987   // new(unsigned long, nothrow);
988   case LibFunc_ZnwmRKSt9nothrow_t:
989   // new[](unsigned int, nothrow);
990   case LibFunc_ZnajRKSt9nothrow_t:
991   // new[](unsigned long, nothrow);
992   case LibFunc_ZnamRKSt9nothrow_t:
993   // new(unsigned int, nothrow);
994   case LibFunc_msvc_new_int_nothrow:
995   // new(unsigned long long, nothrow);
996   case LibFunc_msvc_new_longlong_nothrow:
997   // new[](unsigned int, nothrow);
998   case LibFunc_msvc_new_array_int_nothrow:
999   // new[](unsigned long long, nothrow);
1000   case LibFunc_msvc_new_array_longlong_nothrow:
1001     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
1002 
1003   // void operator delete[](void*);
1004   case LibFunc_ZdaPv:
1005   // void operator delete(void*);
1006   case LibFunc_ZdlPv:
1007   // void operator delete[](void*);
1008   case LibFunc_msvc_delete_array_ptr32:
1009   // void operator delete[](void*);
1010   case LibFunc_msvc_delete_array_ptr64:
1011   // void operator delete(void*);
1012   case LibFunc_msvc_delete_ptr32:
1013   // void operator delete(void*);
1014   case LibFunc_msvc_delete_ptr64:
1015     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1016 
1017   // void operator delete[](void*, nothrow);
1018   case LibFunc_ZdaPvRKSt9nothrow_t:
1019   // void operator delete[](void*, unsigned int);
1020   case LibFunc_ZdaPvj:
1021   // void operator delete[](void*, unsigned long);
1022   case LibFunc_ZdaPvm:
1023   // void operator delete(void*, nothrow);
1024   case LibFunc_ZdlPvRKSt9nothrow_t:
1025   // void operator delete(void*, unsigned int);
1026   case LibFunc_ZdlPvj:
1027   // void operator delete(void*, unsigned long);
1028   case LibFunc_ZdlPvm:
1029   // void operator delete[](void*, unsigned int);
1030   case LibFunc_msvc_delete_array_ptr32_int:
1031   // void operator delete[](void*, nothrow);
1032   case LibFunc_msvc_delete_array_ptr32_nothrow:
1033   // void operator delete[](void*, unsigned long long);
1034   case LibFunc_msvc_delete_array_ptr64_longlong:
1035   // void operator delete[](void*, nothrow);
1036   case LibFunc_msvc_delete_array_ptr64_nothrow:
1037   // void operator delete(void*, unsigned int);
1038   case LibFunc_msvc_delete_ptr32_int:
1039   // void operator delete(void*, nothrow);
1040   case LibFunc_msvc_delete_ptr32_nothrow:
1041   // void operator delete(void*, unsigned long long);
1042   case LibFunc_msvc_delete_ptr64_longlong:
1043   // void operator delete(void*, nothrow);
1044   case LibFunc_msvc_delete_ptr64_nothrow:
1045     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1046 
1047   case LibFunc_memset_pattern16:
1048     return (!FTy.isVarArg() && NumParams == 3 &&
1049             FTy.getParamType(0)->isPointerTy() &&
1050             FTy.getParamType(1)->isPointerTy() &&
1051             FTy.getParamType(2)->isIntegerTy());
1052 
1053   case LibFunc_cxa_guard_abort:
1054   case LibFunc_cxa_guard_acquire:
1055   case LibFunc_cxa_guard_release:
1056   case LibFunc_nvvm_reflect:
1057     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1058 
1059   case LibFunc_sincospi_stret:
1060   case LibFunc_sincospif_stret:
1061     return (NumParams == 1 && FTy.getParamType(0)->isFloatingPointTy());
1062 
1063   case LibFunc_acos:
1064   case LibFunc_acos_finite:
1065   case LibFunc_acosf:
1066   case LibFunc_acosf_finite:
1067   case LibFunc_acosh:
1068   case LibFunc_acosh_finite:
1069   case LibFunc_acoshf:
1070   case LibFunc_acoshf_finite:
1071   case LibFunc_acoshl:
1072   case LibFunc_acoshl_finite:
1073   case LibFunc_acosl:
1074   case LibFunc_acosl_finite:
1075   case LibFunc_asin:
1076   case LibFunc_asin_finite:
1077   case LibFunc_asinf:
1078   case LibFunc_asinf_finite:
1079   case LibFunc_asinh:
1080   case LibFunc_asinhf:
1081   case LibFunc_asinhl:
1082   case LibFunc_asinl:
1083   case LibFunc_asinl_finite:
1084   case LibFunc_atan:
1085   case LibFunc_atanf:
1086   case LibFunc_atanh:
1087   case LibFunc_atanh_finite:
1088   case LibFunc_atanhf:
1089   case LibFunc_atanhf_finite:
1090   case LibFunc_atanhl:
1091   case LibFunc_atanhl_finite:
1092   case LibFunc_atanl:
1093   case LibFunc_cbrt:
1094   case LibFunc_cbrtf:
1095   case LibFunc_cbrtl:
1096   case LibFunc_ceil:
1097   case LibFunc_ceilf:
1098   case LibFunc_ceill:
1099   case LibFunc_cos:
1100   case LibFunc_cosf:
1101   case LibFunc_cosh:
1102   case LibFunc_cosh_finite:
1103   case LibFunc_coshf:
1104   case LibFunc_coshf_finite:
1105   case LibFunc_coshl:
1106   case LibFunc_coshl_finite:
1107   case LibFunc_cosl:
1108   case LibFunc_exp10:
1109   case LibFunc_exp10_finite:
1110   case LibFunc_exp10f:
1111   case LibFunc_exp10f_finite:
1112   case LibFunc_exp10l:
1113   case LibFunc_exp10l_finite:
1114   case LibFunc_exp2:
1115   case LibFunc_exp2_finite:
1116   case LibFunc_exp2f:
1117   case LibFunc_exp2f_finite:
1118   case LibFunc_exp2l:
1119   case LibFunc_exp2l_finite:
1120   case LibFunc_exp:
1121   case LibFunc_exp_finite:
1122   case LibFunc_expf:
1123   case LibFunc_expf_finite:
1124   case LibFunc_expl:
1125   case LibFunc_expl_finite:
1126   case LibFunc_expm1:
1127   case LibFunc_expm1f:
1128   case LibFunc_expm1l:
1129   case LibFunc_fabs:
1130   case LibFunc_fabsf:
1131   case LibFunc_fabsl:
1132   case LibFunc_floor:
1133   case LibFunc_floorf:
1134   case LibFunc_floorl:
1135   case LibFunc_log10:
1136   case LibFunc_log10_finite:
1137   case LibFunc_log10f:
1138   case LibFunc_log10f_finite:
1139   case LibFunc_log10l:
1140   case LibFunc_log10l_finite:
1141   case LibFunc_log1p:
1142   case LibFunc_log1pf:
1143   case LibFunc_log1pl:
1144   case LibFunc_log2:
1145   case LibFunc_log2_finite:
1146   case LibFunc_log2f:
1147   case LibFunc_log2f_finite:
1148   case LibFunc_log2l:
1149   case LibFunc_log2l_finite:
1150   case LibFunc_log:
1151   case LibFunc_log_finite:
1152   case LibFunc_logb:
1153   case LibFunc_logbf:
1154   case LibFunc_logbl:
1155   case LibFunc_logf:
1156   case LibFunc_logf_finite:
1157   case LibFunc_logl:
1158   case LibFunc_logl_finite:
1159   case LibFunc_nearbyint:
1160   case LibFunc_nearbyintf:
1161   case LibFunc_nearbyintl:
1162   case LibFunc_rint:
1163   case LibFunc_rintf:
1164   case LibFunc_rintl:
1165   case LibFunc_round:
1166   case LibFunc_roundf:
1167   case LibFunc_roundl:
1168   case LibFunc_sin:
1169   case LibFunc_sinf:
1170   case LibFunc_sinh:
1171   case LibFunc_sinh_finite:
1172   case LibFunc_sinhf:
1173   case LibFunc_sinhf_finite:
1174   case LibFunc_sinhl:
1175   case LibFunc_sinhl_finite:
1176   case LibFunc_sinl:
1177   case LibFunc_sqrt:
1178   case LibFunc_sqrt_finite:
1179   case LibFunc_sqrtf:
1180   case LibFunc_sqrtf_finite:
1181   case LibFunc_sqrtl:
1182   case LibFunc_sqrtl_finite:
1183   case LibFunc_tan:
1184   case LibFunc_tanf:
1185   case LibFunc_tanh:
1186   case LibFunc_tanhf:
1187   case LibFunc_tanhl:
1188   case LibFunc_tanl:
1189   case LibFunc_trunc:
1190   case LibFunc_truncf:
1191   case LibFunc_truncl:
1192     return (NumParams == 1 && FTy.getReturnType()->isFloatingPointTy() &&
1193             FTy.getReturnType() == FTy.getParamType(0));
1194 
1195   case LibFunc_atan2:
1196   case LibFunc_atan2_finite:
1197   case LibFunc_atan2f:
1198   case LibFunc_atan2f_finite:
1199   case LibFunc_atan2l:
1200   case LibFunc_atan2l_finite:
1201   case LibFunc_fmin:
1202   case LibFunc_fminf:
1203   case LibFunc_fminl:
1204   case LibFunc_fmax:
1205   case LibFunc_fmaxf:
1206   case LibFunc_fmaxl:
1207   case LibFunc_fmod:
1208   case LibFunc_fmodf:
1209   case LibFunc_fmodl:
1210   case LibFunc_copysign:
1211   case LibFunc_copysignf:
1212   case LibFunc_copysignl:
1213   case LibFunc_pow:
1214   case LibFunc_pow_finite:
1215   case LibFunc_powf:
1216   case LibFunc_powf_finite:
1217   case LibFunc_powl:
1218   case LibFunc_powl_finite:
1219     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1220             FTy.getReturnType() == FTy.getParamType(0) &&
1221             FTy.getReturnType() == FTy.getParamType(1));
1222 
1223   case LibFunc_ldexp:
1224   case LibFunc_ldexpf:
1225   case LibFunc_ldexpl:
1226     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1227             FTy.getReturnType() == FTy.getParamType(0) &&
1228             FTy.getParamType(1)->isIntegerTy(32));
1229 
1230   case LibFunc_ffs:
1231   case LibFunc_ffsl:
1232   case LibFunc_ffsll:
1233   case LibFunc_fls:
1234   case LibFunc_flsl:
1235   case LibFunc_flsll:
1236     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1237             FTy.getParamType(0)->isIntegerTy());
1238 
1239   case LibFunc_isdigit:
1240   case LibFunc_isascii:
1241   case LibFunc_toascii:
1242   case LibFunc_putchar:
1243     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1244             FTy.getReturnType() == FTy.getParamType(0));
1245 
1246   case LibFunc_abs:
1247   case LibFunc_labs:
1248   case LibFunc_llabs:
1249     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy() &&
1250             FTy.getReturnType() == FTy.getParamType(0));
1251 
1252   case LibFunc_cxa_atexit:
1253     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy() &&
1254             FTy.getParamType(0)->isPointerTy() &&
1255             FTy.getParamType(1)->isPointerTy() &&
1256             FTy.getParamType(2)->isPointerTy());
1257 
1258   case LibFunc_sinpi:
1259   case LibFunc_cospi:
1260     return (NumParams == 1 && FTy.getReturnType()->isDoubleTy() &&
1261             FTy.getReturnType() == FTy.getParamType(0));
1262 
1263   case LibFunc_sinpif:
1264   case LibFunc_cospif:
1265     return (NumParams == 1 && FTy.getReturnType()->isFloatTy() &&
1266             FTy.getReturnType() == FTy.getParamType(0));
1267 
1268   case LibFunc_strnlen:
1269     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(1) &&
1270             FTy.getParamType(0) == PCharTy &&
1271             FTy.getParamType(1) == SizeTTy);
1272 
1273   case LibFunc_posix_memalign:
1274     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1275             FTy.getParamType(0)->isPointerTy() &&
1276             FTy.getParamType(1) == SizeTTy && FTy.getParamType(2) == SizeTTy);
1277 
1278   case LibFunc_wcslen:
1279     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
1280             FTy.getReturnType()->isIntegerTy());
1281 
1282   case LibFunc_cabs:
1283   case LibFunc_cabsf:
1284   case LibFunc_cabsl: {
1285     Type* RetTy = FTy.getReturnType();
1286     if (!RetTy->isFloatingPointTy())
1287       return false;
1288 
1289     // NOTE: These prototypes are target specific and currently support
1290     // "complex" passed as an array or discrete real & imaginary parameters.
1291     // Add other calling conventions to enable libcall optimizations.
1292     if (NumParams == 1)
1293       return (FTy.getParamType(0)->isArrayTy() &&
1294               FTy.getParamType(0)->getArrayNumElements() == 2 &&
1295               FTy.getParamType(0)->getArrayElementType() == RetTy);
1296     else if (NumParams == 2)
1297       return (FTy.getParamType(0) == RetTy && FTy.getParamType(1) == RetTy);
1298     else
1299       return false;
1300   }
1301   case LibFunc::NumLibFuncs:
1302     break;
1303   }
1304 
1305   llvm_unreachable("Invalid libfunc");
1306 }
1307 
1308 bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl,
1309                                        LibFunc &F) const {
1310   const DataLayout *DL =
1311       FDecl.getParent() ? &FDecl.getParent()->getDataLayout() : nullptr;
1312   return getLibFunc(FDecl.getName(), F) &&
1313          isValidProtoForLibFunc(*FDecl.getFunctionType(), F, DL);
1314 }
1315 
1316 void TargetLibraryInfoImpl::disableAllFunctions() {
1317   memset(AvailableArray, 0, sizeof(AvailableArray));
1318 }
1319 
1320 static bool compareByScalarFnName(const VecDesc &LHS, const VecDesc &RHS) {
1321   return LHS.ScalarFnName < RHS.ScalarFnName;
1322 }
1323 
1324 static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) {
1325   return LHS.VectorFnName < RHS.VectorFnName;
1326 }
1327 
1328 static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) {
1329   return LHS.ScalarFnName < S;
1330 }
1331 
1332 static bool compareWithVectorFnName(const VecDesc &LHS, StringRef S) {
1333   return LHS.VectorFnName < S;
1334 }
1335 
1336 void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) {
1337   VectorDescs.insert(VectorDescs.end(), Fns.begin(), Fns.end());
1338   std::sort(VectorDescs.begin(), VectorDescs.end(), compareByScalarFnName);
1339 
1340   ScalarDescs.insert(ScalarDescs.end(), Fns.begin(), Fns.end());
1341   std::sort(ScalarDescs.begin(), ScalarDescs.end(), compareByVectorFnName);
1342 }
1343 
1344 void TargetLibraryInfoImpl::addVectorizableFunctionsFromVecLib(
1345     enum VectorLibrary VecLib) {
1346   switch (VecLib) {
1347   case Accelerate: {
1348     const VecDesc VecFuncs[] = {
1349         // Floating-Point Arithmetic and Auxiliary Functions
1350         {"ceilf", "vceilf", 4},
1351         {"fabsf", "vfabsf", 4},
1352         {"llvm.fabs.f32", "vfabsf", 4},
1353         {"floorf", "vfloorf", 4},
1354         {"sqrtf", "vsqrtf", 4},
1355         {"llvm.sqrt.f32", "vsqrtf", 4},
1356 
1357         // Exponential and Logarithmic Functions
1358         {"expf", "vexpf", 4},
1359         {"llvm.exp.f32", "vexpf", 4},
1360         {"expm1f", "vexpm1f", 4},
1361         {"logf", "vlogf", 4},
1362         {"llvm.log.f32", "vlogf", 4},
1363         {"log1pf", "vlog1pf", 4},
1364         {"log10f", "vlog10f", 4},
1365         {"llvm.log10.f32", "vlog10f", 4},
1366         {"logbf", "vlogbf", 4},
1367 
1368         // Trigonometric Functions
1369         {"sinf", "vsinf", 4},
1370         {"llvm.sin.f32", "vsinf", 4},
1371         {"cosf", "vcosf", 4},
1372         {"llvm.cos.f32", "vcosf", 4},
1373         {"tanf", "vtanf", 4},
1374         {"asinf", "vasinf", 4},
1375         {"acosf", "vacosf", 4},
1376         {"atanf", "vatanf", 4},
1377 
1378         // Hyperbolic Functions
1379         {"sinhf", "vsinhf", 4},
1380         {"coshf", "vcoshf", 4},
1381         {"tanhf", "vtanhf", 4},
1382         {"asinhf", "vasinhf", 4},
1383         {"acoshf", "vacoshf", 4},
1384         {"atanhf", "vatanhf", 4},
1385     };
1386     addVectorizableFunctions(VecFuncs);
1387     break;
1388   }
1389   case SVML: {
1390     const VecDesc VecFuncs[] = {
1391         {"sin", "__svml_sin2", 2},
1392         {"sin", "__svml_sin4", 4},
1393         {"sin", "__svml_sin8", 8},
1394 
1395         {"sinf", "__svml_sinf4", 4},
1396         {"sinf", "__svml_sinf8", 8},
1397         {"sinf", "__svml_sinf16", 16},
1398 
1399         {"cos", "__svml_cos2", 2},
1400         {"cos", "__svml_cos4", 4},
1401         {"cos", "__svml_cos8", 8},
1402 
1403         {"cosf", "__svml_cosf4", 4},
1404         {"cosf", "__svml_cosf8", 8},
1405         {"cosf", "__svml_cosf16", 16},
1406 
1407         {"pow", "__svml_pow2", 2},
1408         {"pow", "__svml_pow4", 4},
1409         {"pow", "__svml_pow8", 8},
1410 
1411         {"powf", "__svml_powf4", 4},
1412         {"powf", "__svml_powf8", 8},
1413         {"powf", "__svml_powf16", 16},
1414 
1415         { "__pow_finite", "__svml_pow2", 2 },
1416         { "__pow_finite", "__svml_pow4", 4 },
1417         { "__pow_finite", "__svml_pow8", 8 },
1418 
1419         { "__powf_finite", "__svml_powf4", 4 },
1420         { "__powf_finite", "__svml_powf8", 8 },
1421         { "__powf_finite", "__svml_powf16", 16 },
1422 
1423         {"llvm.pow.f64", "__svml_pow2", 2},
1424         {"llvm.pow.f64", "__svml_pow4", 4},
1425         {"llvm.pow.f64", "__svml_pow8", 8},
1426 
1427         {"llvm.pow.f32", "__svml_powf4", 4},
1428         {"llvm.pow.f32", "__svml_powf8", 8},
1429         {"llvm.pow.f32", "__svml_powf16", 16},
1430 
1431         {"exp", "__svml_exp2", 2},
1432         {"exp", "__svml_exp4", 4},
1433         {"exp", "__svml_exp8", 8},
1434 
1435         {"expf", "__svml_expf4", 4},
1436         {"expf", "__svml_expf8", 8},
1437         {"expf", "__svml_expf16", 16},
1438 
1439         { "__exp_finite", "__svml_exp2", 2 },
1440         { "__exp_finite", "__svml_exp4", 4 },
1441         { "__exp_finite", "__svml_exp8", 8 },
1442 
1443         { "__expf_finite", "__svml_expf4", 4 },
1444         { "__expf_finite", "__svml_expf8", 8 },
1445         { "__expf_finite", "__svml_expf16", 16 },
1446 
1447         {"llvm.exp.f64", "__svml_exp2", 2},
1448         {"llvm.exp.f64", "__svml_exp4", 4},
1449         {"llvm.exp.f64", "__svml_exp8", 8},
1450 
1451         {"llvm.exp.f32", "__svml_expf4", 4},
1452         {"llvm.exp.f32", "__svml_expf8", 8},
1453         {"llvm.exp.f32", "__svml_expf16", 16},
1454 
1455         {"log", "__svml_log2", 2},
1456         {"log", "__svml_log4", 4},
1457         {"log", "__svml_log8", 8},
1458 
1459         {"logf", "__svml_logf4", 4},
1460         {"logf", "__svml_logf8", 8},
1461         {"logf", "__svml_logf16", 16},
1462 
1463         { "__log_finite", "__svml_log2", 2 },
1464         { "__log_finite", "__svml_log4", 4 },
1465         { "__log_finite", "__svml_log8", 8 },
1466 
1467         { "__logf_finite", "__svml_logf4", 4 },
1468         { "__logf_finite", "__svml_logf8", 8 },
1469         { "__logf_finite", "__svml_logf16", 16 },
1470 
1471         {"llvm.log.f64", "__svml_log2", 2},
1472         {"llvm.log.f64", "__svml_log4", 4},
1473         {"llvm.log.f64", "__svml_log8", 8},
1474 
1475         {"llvm.log.f32", "__svml_logf4", 4},
1476         {"llvm.log.f32", "__svml_logf8", 8},
1477         {"llvm.log.f32", "__svml_logf16", 16},
1478     };
1479     addVectorizableFunctions(VecFuncs);
1480     break;
1481   }
1482   case NoLibrary:
1483     break;
1484   }
1485 }
1486 
1487 bool TargetLibraryInfoImpl::isFunctionVectorizable(StringRef funcName) const {
1488   funcName = sanitizeFunctionName(funcName);
1489   if (funcName.empty())
1490     return false;
1491 
1492   std::vector<VecDesc>::const_iterator I = std::lower_bound(
1493       VectorDescs.begin(), VectorDescs.end(), funcName,
1494       compareWithScalarFnName);
1495   return I != VectorDescs.end() && StringRef(I->ScalarFnName) == funcName;
1496 }
1497 
1498 StringRef TargetLibraryInfoImpl::getVectorizedFunction(StringRef F,
1499                                                        unsigned VF) const {
1500   F = sanitizeFunctionName(F);
1501   if (F.empty())
1502     return F;
1503   std::vector<VecDesc>::const_iterator I = std::lower_bound(
1504       VectorDescs.begin(), VectorDescs.end(), F, compareWithScalarFnName);
1505   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == F) {
1506     if (I->VectorizationFactor == VF)
1507       return I->VectorFnName;
1508     ++I;
1509   }
1510   return StringRef();
1511 }
1512 
1513 StringRef TargetLibraryInfoImpl::getScalarizedFunction(StringRef F,
1514                                                        unsigned &VF) const {
1515   F = sanitizeFunctionName(F);
1516   if (F.empty())
1517     return F;
1518 
1519   std::vector<VecDesc>::const_iterator I = std::lower_bound(
1520       ScalarDescs.begin(), ScalarDescs.end(), F, compareWithVectorFnName);
1521   if (I == VectorDescs.end() || StringRef(I->VectorFnName) != F)
1522     return StringRef();
1523   VF = I->VectorizationFactor;
1524   return I->ScalarFnName;
1525 }
1526 
1527 TargetLibraryInfo TargetLibraryAnalysis::run(Module &M,
1528                                              ModuleAnalysisManager &) {
1529   if (PresetInfoImpl)
1530     return TargetLibraryInfo(*PresetInfoImpl);
1531 
1532   return TargetLibraryInfo(lookupInfoImpl(Triple(M.getTargetTriple())));
1533 }
1534 
1535 TargetLibraryInfo TargetLibraryAnalysis::run(Function &F,
1536                                              FunctionAnalysisManager &) {
1537   if (PresetInfoImpl)
1538     return TargetLibraryInfo(*PresetInfoImpl);
1539 
1540   return TargetLibraryInfo(
1541       lookupInfoImpl(Triple(F.getParent()->getTargetTriple())));
1542 }
1543 
1544 TargetLibraryInfoImpl &TargetLibraryAnalysis::lookupInfoImpl(const Triple &T) {
1545   std::unique_ptr<TargetLibraryInfoImpl> &Impl =
1546       Impls[T.normalize()];
1547   if (!Impl)
1548     Impl.reset(new TargetLibraryInfoImpl(T));
1549 
1550   return *Impl;
1551 }
1552 
1553 unsigned TargetLibraryInfoImpl::getWCharSize(const Module &M) const {
1554   if (auto *ShortWChar = cast_or_null<ConstantAsMetadata>(
1555       M.getModuleFlag("wchar_size")))
1556     return cast<ConstantInt>(ShortWChar->getValue())->getZExtValue();
1557   return 0;
1558 }
1559 
1560 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass()
1561     : ImmutablePass(ID), TLIImpl(), TLI(TLIImpl) {
1562   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1563 }
1564 
1565 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T)
1566     : ImmutablePass(ID), TLIImpl(T), TLI(TLIImpl) {
1567   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1568 }
1569 
1570 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(
1571     const TargetLibraryInfoImpl &TLIImpl)
1572     : ImmutablePass(ID), TLIImpl(TLIImpl), TLI(this->TLIImpl) {
1573   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1574 }
1575 
1576 AnalysisKey TargetLibraryAnalysis::Key;
1577 
1578 // Register the basic pass.
1579 INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo",
1580                 "Target Library Information", false, true)
1581 char TargetLibraryInfoWrapperPass::ID = 0;
1582 
1583 void TargetLibraryInfoWrapperPass::anchor() {}
1584