1 //===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements the TargetLibraryInfo class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "llvm/Analysis/TargetLibraryInfo.h"
14 #include "llvm/ADT/Triple.h"
15 #include "llvm/IR/Constants.h"
16 #include "llvm/InitializePasses.h"
17 #include "llvm/Support/CommandLine.h"
18 using namespace llvm;
19 
20 static cl::opt<TargetLibraryInfoImpl::VectorLibrary> ClVectorLibrary(
21     "vector-library", cl::Hidden, cl::desc("Vector functions library"),
22     cl::init(TargetLibraryInfoImpl::NoLibrary),
23     cl::values(clEnumValN(TargetLibraryInfoImpl::NoLibrary, "none",
24                           "No vector functions library"),
25                clEnumValN(TargetLibraryInfoImpl::Accelerate, "Accelerate",
26                           "Accelerate framework"),
27                clEnumValN(TargetLibraryInfoImpl::DarwinLibSystemM,
28                           "Darwin_libsystem_m", "Darwin libsystem_m"),
29                clEnumValN(TargetLibraryInfoImpl::LIBMVEC_X86, "LIBMVEC-X86",
30                           "GLIBC Vector Math library"),
31                clEnumValN(TargetLibraryInfoImpl::MASSV, "MASSV",
32                           "IBM MASS vector library"),
33                clEnumValN(TargetLibraryInfoImpl::SVML, "SVML",
34                           "Intel SVML library")));
35 
36 StringLiteral const TargetLibraryInfoImpl::StandardNames[LibFunc::NumLibFuncs] =
37     {
38 #define TLI_DEFINE_STRING
39 #include "llvm/Analysis/TargetLibraryInfo.def"
40 };
41 
42 static bool hasSinCosPiStret(const Triple &T) {
43   // Only Darwin variants have _stret versions of combined trig functions.
44   if (!T.isOSDarwin())
45     return false;
46 
47   // The ABI is rather complicated on x86, so don't do anything special there.
48   if (T.getArch() == Triple::x86)
49     return false;
50 
51   if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
52     return false;
53 
54   if (T.isiOS() && T.isOSVersionLT(7, 0))
55     return false;
56 
57   return true;
58 }
59 
60 static bool hasBcmp(const Triple &TT) {
61   // Posix removed support from bcmp() in 2001, but the glibc and several
62   // implementations of the libc still have it.
63   if (TT.isOSLinux())
64     return TT.isGNUEnvironment() || TT.isMusl();
65   // Both NetBSD and OpenBSD are planning to remove the function. Windows does
66   // not have it.
67   return TT.isOSFreeBSD() || TT.isOSSolaris();
68 }
69 
70 static bool isCallingConvCCompatible(CallingConv::ID CC, StringRef TT,
71                                      FunctionType *FuncTy) {
72   switch (CC) {
73   default:
74     return false;
75   case llvm::CallingConv::C:
76     return true;
77   case llvm::CallingConv::ARM_APCS:
78   case llvm::CallingConv::ARM_AAPCS:
79   case llvm::CallingConv::ARM_AAPCS_VFP: {
80 
81     // The iOS ABI diverges from the standard in some cases, so for now don't
82     // try to simplify those calls.
83     if (Triple(TT).isiOS())
84       return false;
85 
86     if (!FuncTy->getReturnType()->isPointerTy() &&
87         !FuncTy->getReturnType()->isIntegerTy() &&
88         !FuncTy->getReturnType()->isVoidTy())
89       return false;
90 
91     for (auto *Param : FuncTy->params()) {
92       if (!Param->isPointerTy() && !Param->isIntegerTy())
93         return false;
94     }
95     return true;
96   }
97   }
98   return false;
99 }
100 
101 bool TargetLibraryInfoImpl::isCallingConvCCompatible(CallBase *CI) {
102   return ::isCallingConvCCompatible(CI->getCallingConv(),
103                                     CI->getModule()->getTargetTriple(),
104                                     CI->getFunctionType());
105 }
106 
107 bool TargetLibraryInfoImpl::isCallingConvCCompatible(Function *F) {
108   return ::isCallingConvCCompatible(F->getCallingConv(),
109                                     F->getParent()->getTargetTriple(),
110                                     F->getFunctionType());
111 }
112 
113 /// Initialize the set of available library functions based on the specified
114 /// target triple. This should be carefully written so that a missing target
115 /// triple gets a sane set of defaults.
116 static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
117                        ArrayRef<StringLiteral> StandardNames) {
118   // Verify that the StandardNames array is in alphabetical order.
119   assert(
120       llvm::is_sorted(StandardNames,
121                       [](StringRef LHS, StringRef RHS) { return LHS < RHS; }) &&
122       "TargetLibraryInfoImpl function names must be sorted");
123 
124   // Set IO unlocked variants as unavailable
125   // Set them as available per system below
126   TLI.setUnavailable(LibFunc_getc_unlocked);
127   TLI.setUnavailable(LibFunc_getchar_unlocked);
128   TLI.setUnavailable(LibFunc_putc_unlocked);
129   TLI.setUnavailable(LibFunc_putchar_unlocked);
130   TLI.setUnavailable(LibFunc_fputc_unlocked);
131   TLI.setUnavailable(LibFunc_fgetc_unlocked);
132   TLI.setUnavailable(LibFunc_fread_unlocked);
133   TLI.setUnavailable(LibFunc_fwrite_unlocked);
134   TLI.setUnavailable(LibFunc_fputs_unlocked);
135   TLI.setUnavailable(LibFunc_fgets_unlocked);
136 
137   bool ShouldExtI32Param = false, ShouldExtI32Return = false,
138        ShouldSignExtI32Param = false;
139   // PowerPC64, Sparc64, SystemZ need signext/zeroext on i32 parameters and
140   // returns corresponding to C-level ints and unsigned ints.
141   if (T.isPPC64() || T.getArch() == Triple::sparcv9 ||
142       T.getArch() == Triple::systemz) {
143     ShouldExtI32Param = true;
144     ShouldExtI32Return = true;
145   }
146   // Mips, on the other hand, needs signext on i32 parameters corresponding
147   // to both signed and unsigned ints.
148   if (T.isMIPS()) {
149     ShouldSignExtI32Param = true;
150   }
151   TLI.setShouldExtI32Param(ShouldExtI32Param);
152   TLI.setShouldExtI32Return(ShouldExtI32Return);
153   TLI.setShouldSignExtI32Param(ShouldSignExtI32Param);
154 
155   // Let's assume by default that the size of int is 32 bits, unless the target
156   // is a 16-bit architecture because then it most likely is 16 bits. If that
157   // isn't true for a target those defaults should be overridden below.
158   TLI.setIntSize(T.isArch16Bit() ? 16 : 32);
159 
160   // There is really no runtime library on AMDGPU, apart from
161   // __kmpc_alloc/free_shared.
162   if (T.isAMDGPU()) {
163     TLI.disableAllFunctions();
164     TLI.setAvailable(llvm::LibFunc___kmpc_alloc_shared);
165     TLI.setAvailable(llvm::LibFunc___kmpc_free_shared);
166     return;
167   }
168 
169   // memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
170   // All versions of watchOS support it.
171   if (T.isMacOSX()) {
172     // available IO unlocked variants on Mac OS X
173     TLI.setAvailable(LibFunc_getc_unlocked);
174     TLI.setAvailable(LibFunc_getchar_unlocked);
175     TLI.setAvailable(LibFunc_putc_unlocked);
176     TLI.setAvailable(LibFunc_putchar_unlocked);
177 
178     if (T.isMacOSXVersionLT(10, 5))
179       TLI.setUnavailable(LibFunc_memset_pattern16);
180   } else if (T.isiOS()) {
181     if (T.isOSVersionLT(3, 0))
182       TLI.setUnavailable(LibFunc_memset_pattern16);
183   } else if (!T.isWatchOS()) {
184     TLI.setUnavailable(LibFunc_memset_pattern16);
185   }
186 
187   if (!hasSinCosPiStret(T)) {
188     TLI.setUnavailable(LibFunc_sinpi);
189     TLI.setUnavailable(LibFunc_sinpif);
190     TLI.setUnavailable(LibFunc_cospi);
191     TLI.setUnavailable(LibFunc_cospif);
192     TLI.setUnavailable(LibFunc_sincospi_stret);
193     TLI.setUnavailable(LibFunc_sincospif_stret);
194   }
195 
196   if (!hasBcmp(T))
197     TLI.setUnavailable(LibFunc_bcmp);
198 
199   if (T.isMacOSX() && T.getArch() == Triple::x86 &&
200       !T.isMacOSXVersionLT(10, 7)) {
201     // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
202     // we don't care about) have two versions; on recent OSX, the one we want
203     // has a $UNIX2003 suffix. The two implementations are identical except
204     // for the return value in some edge cases.  However, we don't want to
205     // generate code that depends on the old symbols.
206     TLI.setAvailableWithName(LibFunc_fwrite, "fwrite$UNIX2003");
207     TLI.setAvailableWithName(LibFunc_fputs, "fputs$UNIX2003");
208   }
209 
210   // iprintf and friends are only available on XCore, TCE, and Emscripten.
211   if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce &&
212       T.getOS() != Triple::Emscripten) {
213     TLI.setUnavailable(LibFunc_iprintf);
214     TLI.setUnavailable(LibFunc_siprintf);
215     TLI.setUnavailable(LibFunc_fiprintf);
216   }
217 
218   // __small_printf and friends are only available on Emscripten.
219   if (T.getOS() != Triple::Emscripten) {
220     TLI.setUnavailable(LibFunc_small_printf);
221     TLI.setUnavailable(LibFunc_small_sprintf);
222     TLI.setUnavailable(LibFunc_small_fprintf);
223   }
224 
225   if (T.isOSWindows() && !T.isOSCygMing()) {
226     // XXX: The earliest documentation available at the moment is for VS2015/VC19:
227     // https://docs.microsoft.com/en-us/cpp/c-runtime-library/floating-point-support?view=vs-2015
228     // XXX: In order to use an MSVCRT older than VC19,
229     // the specific library version must be explicit in the target triple,
230     // e.g., x86_64-pc-windows-msvc18.
231     bool hasPartialC99 = true;
232     if (T.isKnownWindowsMSVCEnvironment()) {
233       unsigned Major, Minor, Micro;
234       T.getEnvironmentVersion(Major, Minor, Micro);
235       hasPartialC99 = (Major == 0 || Major >= 19);
236     }
237 
238     // Latest targets support C89 math functions, in part.
239     bool isARM = (T.getArch() == Triple::aarch64 ||
240                   T.getArch() == Triple::arm);
241     bool hasPartialFloat = (isARM ||
242                             T.getArch() == Triple::x86_64);
243 
244     // Win32 does not support float C89 math functions, in general.
245     if (!hasPartialFloat) {
246       TLI.setUnavailable(LibFunc_acosf);
247       TLI.setUnavailable(LibFunc_asinf);
248       TLI.setUnavailable(LibFunc_atan2f);
249       TLI.setUnavailable(LibFunc_atanf);
250       TLI.setUnavailable(LibFunc_ceilf);
251       TLI.setUnavailable(LibFunc_cosf);
252       TLI.setUnavailable(LibFunc_coshf);
253       TLI.setUnavailable(LibFunc_expf);
254       TLI.setUnavailable(LibFunc_floorf);
255       TLI.setUnavailable(LibFunc_fmodf);
256       TLI.setUnavailable(LibFunc_log10f);
257       TLI.setUnavailable(LibFunc_logf);
258       TLI.setUnavailable(LibFunc_modff);
259       TLI.setUnavailable(LibFunc_powf);
260       TLI.setUnavailable(LibFunc_remainderf);
261       TLI.setUnavailable(LibFunc_sinf);
262       TLI.setUnavailable(LibFunc_sinhf);
263       TLI.setUnavailable(LibFunc_sqrtf);
264       TLI.setUnavailable(LibFunc_tanf);
265       TLI.setUnavailable(LibFunc_tanhf);
266     }
267     if (!isARM)
268       TLI.setUnavailable(LibFunc_fabsf);
269     TLI.setUnavailable(LibFunc_frexpf);
270     TLI.setUnavailable(LibFunc_ldexpf);
271 
272     // Win32 does not support long double C89 math functions.
273     TLI.setUnavailable(LibFunc_acosl);
274     TLI.setUnavailable(LibFunc_asinl);
275     TLI.setUnavailable(LibFunc_atan2l);
276     TLI.setUnavailable(LibFunc_atanl);
277     TLI.setUnavailable(LibFunc_ceill);
278     TLI.setUnavailable(LibFunc_cosl);
279     TLI.setUnavailable(LibFunc_coshl);
280     TLI.setUnavailable(LibFunc_expl);
281     TLI.setUnavailable(LibFunc_fabsl);
282     TLI.setUnavailable(LibFunc_floorl);
283     TLI.setUnavailable(LibFunc_fmodl);
284     TLI.setUnavailable(LibFunc_frexpl);
285     TLI.setUnavailable(LibFunc_ldexpl);
286     TLI.setUnavailable(LibFunc_log10l);
287     TLI.setUnavailable(LibFunc_logl);
288     TLI.setUnavailable(LibFunc_modfl);
289     TLI.setUnavailable(LibFunc_powl);
290     TLI.setUnavailable(LibFunc_remainderl);
291     TLI.setUnavailable(LibFunc_sinl);
292     TLI.setUnavailable(LibFunc_sinhl);
293     TLI.setUnavailable(LibFunc_sqrtl);
294     TLI.setUnavailable(LibFunc_tanl);
295     TLI.setUnavailable(LibFunc_tanhl);
296 
297     // Win32 does not fully support C99 math functions.
298     if (!hasPartialC99) {
299       TLI.setUnavailable(LibFunc_acosh);
300       TLI.setUnavailable(LibFunc_acoshf);
301       TLI.setUnavailable(LibFunc_asinh);
302       TLI.setUnavailable(LibFunc_asinhf);
303       TLI.setUnavailable(LibFunc_atanh);
304       TLI.setUnavailable(LibFunc_atanhf);
305       TLI.setAvailableWithName(LibFunc_cabs, "_cabs");
306       TLI.setUnavailable(LibFunc_cabsf);
307       TLI.setUnavailable(LibFunc_cbrt);
308       TLI.setUnavailable(LibFunc_cbrtf);
309       TLI.setAvailableWithName(LibFunc_copysign, "_copysign");
310       TLI.setAvailableWithName(LibFunc_copysignf, "_copysignf");
311       TLI.setUnavailable(LibFunc_exp2);
312       TLI.setUnavailable(LibFunc_exp2f);
313       TLI.setUnavailable(LibFunc_expm1);
314       TLI.setUnavailable(LibFunc_expm1f);
315       TLI.setUnavailable(LibFunc_fmax);
316       TLI.setUnavailable(LibFunc_fmaxf);
317       TLI.setUnavailable(LibFunc_fmin);
318       TLI.setUnavailable(LibFunc_fminf);
319       TLI.setUnavailable(LibFunc_log1p);
320       TLI.setUnavailable(LibFunc_log1pf);
321       TLI.setUnavailable(LibFunc_log2);
322       TLI.setUnavailable(LibFunc_log2f);
323       TLI.setAvailableWithName(LibFunc_logb, "_logb");
324       if (hasPartialFloat)
325         TLI.setAvailableWithName(LibFunc_logbf, "_logbf");
326       else
327         TLI.setUnavailable(LibFunc_logbf);
328       TLI.setUnavailable(LibFunc_rint);
329       TLI.setUnavailable(LibFunc_rintf);
330       TLI.setUnavailable(LibFunc_round);
331       TLI.setUnavailable(LibFunc_roundf);
332       TLI.setUnavailable(LibFunc_trunc);
333       TLI.setUnavailable(LibFunc_truncf);
334     }
335 
336     // Win32 does not support long double C99 math functions.
337     TLI.setUnavailable(LibFunc_acoshl);
338     TLI.setUnavailable(LibFunc_asinhl);
339     TLI.setUnavailable(LibFunc_atanhl);
340     TLI.setUnavailable(LibFunc_cabsl);
341     TLI.setUnavailable(LibFunc_cbrtl);
342     TLI.setUnavailable(LibFunc_copysignl);
343     TLI.setUnavailable(LibFunc_exp2l);
344     TLI.setUnavailable(LibFunc_expm1l);
345     TLI.setUnavailable(LibFunc_fmaxl);
346     TLI.setUnavailable(LibFunc_fminl);
347     TLI.setUnavailable(LibFunc_log1pl);
348     TLI.setUnavailable(LibFunc_log2l);
349     TLI.setUnavailable(LibFunc_logbl);
350     TLI.setUnavailable(LibFunc_nearbyintl);
351     TLI.setUnavailable(LibFunc_rintl);
352     TLI.setUnavailable(LibFunc_roundl);
353     TLI.setUnavailable(LibFunc_truncl);
354 
355     // Win32 does not support these functions, but
356     // they are generally available on POSIX-compliant systems.
357     TLI.setUnavailable(LibFunc_access);
358     TLI.setUnavailable(LibFunc_chmod);
359     TLI.setUnavailable(LibFunc_closedir);
360     TLI.setUnavailable(LibFunc_fdopen);
361     TLI.setUnavailable(LibFunc_fileno);
362     TLI.setUnavailable(LibFunc_fseeko);
363     TLI.setUnavailable(LibFunc_fstat);
364     TLI.setUnavailable(LibFunc_ftello);
365     TLI.setUnavailable(LibFunc_gettimeofday);
366     TLI.setUnavailable(LibFunc_memccpy);
367     TLI.setUnavailable(LibFunc_mkdir);
368     TLI.setUnavailable(LibFunc_open);
369     TLI.setUnavailable(LibFunc_opendir);
370     TLI.setUnavailable(LibFunc_pclose);
371     TLI.setUnavailable(LibFunc_popen);
372     TLI.setUnavailable(LibFunc_read);
373     TLI.setUnavailable(LibFunc_rmdir);
374     TLI.setUnavailable(LibFunc_stat);
375     TLI.setUnavailable(LibFunc_strcasecmp);
376     TLI.setUnavailable(LibFunc_strncasecmp);
377     TLI.setUnavailable(LibFunc_unlink);
378     TLI.setUnavailable(LibFunc_utime);
379     TLI.setUnavailable(LibFunc_write);
380   }
381 
382   if (T.isOSWindows() && !T.isWindowsCygwinEnvironment()) {
383     // These functions aren't available in either MSVC or MinGW environments.
384     TLI.setUnavailable(LibFunc_bcmp);
385     TLI.setUnavailable(LibFunc_bcopy);
386     TLI.setUnavailable(LibFunc_bzero);
387     TLI.setUnavailable(LibFunc_chown);
388     TLI.setUnavailable(LibFunc_ctermid);
389     TLI.setUnavailable(LibFunc_ffs);
390     TLI.setUnavailable(LibFunc_flockfile);
391     TLI.setUnavailable(LibFunc_fstatvfs);
392     TLI.setUnavailable(LibFunc_ftrylockfile);
393     TLI.setUnavailable(LibFunc_funlockfile);
394     TLI.setUnavailable(LibFunc_getitimer);
395     TLI.setUnavailable(LibFunc_getlogin_r);
396     TLI.setUnavailable(LibFunc_getpwnam);
397     TLI.setUnavailable(LibFunc_htonl);
398     TLI.setUnavailable(LibFunc_htons);
399     TLI.setUnavailable(LibFunc_lchown);
400     TLI.setUnavailable(LibFunc_lstat);
401     TLI.setUnavailable(LibFunc_ntohl);
402     TLI.setUnavailable(LibFunc_ntohs);
403     TLI.setUnavailable(LibFunc_pread);
404     TLI.setUnavailable(LibFunc_pwrite);
405     TLI.setUnavailable(LibFunc_readlink);
406     TLI.setUnavailable(LibFunc_realpath);
407     TLI.setUnavailable(LibFunc_setitimer);
408     TLI.setUnavailable(LibFunc_statvfs);
409     TLI.setUnavailable(LibFunc_stpcpy);
410     TLI.setUnavailable(LibFunc_stpncpy);
411     TLI.setUnavailable(LibFunc_times);
412     TLI.setUnavailable(LibFunc_uname);
413     TLI.setUnavailable(LibFunc_unsetenv);
414     TLI.setUnavailable(LibFunc_utimes);
415   }
416 
417   // Pick just one set of new/delete variants.
418   if (T.isOSMSVCRT()) {
419     // MSVC, doesn't have the Itanium new/delete.
420     TLI.setUnavailable(LibFunc_ZdaPv);
421     TLI.setUnavailable(LibFunc_ZdaPvRKSt9nothrow_t);
422     TLI.setUnavailable(LibFunc_ZdaPvSt11align_val_t);
423     TLI.setUnavailable(LibFunc_ZdaPvSt11align_val_tRKSt9nothrow_t);
424     TLI.setUnavailable(LibFunc_ZdaPvj);
425     TLI.setUnavailable(LibFunc_ZdaPvjSt11align_val_t);
426     TLI.setUnavailable(LibFunc_ZdaPvm);
427     TLI.setUnavailable(LibFunc_ZdaPvmSt11align_val_t);
428     TLI.setUnavailable(LibFunc_ZdlPv);
429     TLI.setUnavailable(LibFunc_ZdlPvRKSt9nothrow_t);
430     TLI.setUnavailable(LibFunc_ZdlPvSt11align_val_t);
431     TLI.setUnavailable(LibFunc_ZdlPvSt11align_val_tRKSt9nothrow_t);
432     TLI.setUnavailable(LibFunc_ZdlPvj);
433     TLI.setUnavailable(LibFunc_ZdlPvjSt11align_val_t);
434     TLI.setUnavailable(LibFunc_ZdlPvm);
435     TLI.setUnavailable(LibFunc_ZdlPvmSt11align_val_t);
436     TLI.setUnavailable(LibFunc_Znaj);
437     TLI.setUnavailable(LibFunc_ZnajRKSt9nothrow_t);
438     TLI.setUnavailable(LibFunc_ZnajSt11align_val_t);
439     TLI.setUnavailable(LibFunc_ZnajSt11align_val_tRKSt9nothrow_t);
440     TLI.setUnavailable(LibFunc_Znam);
441     TLI.setUnavailable(LibFunc_ZnamRKSt9nothrow_t);
442     TLI.setUnavailable(LibFunc_ZnamSt11align_val_t);
443     TLI.setUnavailable(LibFunc_ZnamSt11align_val_tRKSt9nothrow_t);
444     TLI.setUnavailable(LibFunc_Znwj);
445     TLI.setUnavailable(LibFunc_ZnwjRKSt9nothrow_t);
446     TLI.setUnavailable(LibFunc_ZnwjSt11align_val_t);
447     TLI.setUnavailable(LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t);
448     TLI.setUnavailable(LibFunc_Znwm);
449     TLI.setUnavailable(LibFunc_ZnwmRKSt9nothrow_t);
450     TLI.setUnavailable(LibFunc_ZnwmSt11align_val_t);
451     TLI.setUnavailable(LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t);
452   } else {
453     // Not MSVC, assume it's Itanium.
454     TLI.setUnavailable(LibFunc_msvc_new_int);
455     TLI.setUnavailable(LibFunc_msvc_new_int_nothrow);
456     TLI.setUnavailable(LibFunc_msvc_new_longlong);
457     TLI.setUnavailable(LibFunc_msvc_new_longlong_nothrow);
458     TLI.setUnavailable(LibFunc_msvc_delete_ptr32);
459     TLI.setUnavailable(LibFunc_msvc_delete_ptr32_nothrow);
460     TLI.setUnavailable(LibFunc_msvc_delete_ptr32_int);
461     TLI.setUnavailable(LibFunc_msvc_delete_ptr64);
462     TLI.setUnavailable(LibFunc_msvc_delete_ptr64_nothrow);
463     TLI.setUnavailable(LibFunc_msvc_delete_ptr64_longlong);
464     TLI.setUnavailable(LibFunc_msvc_new_array_int);
465     TLI.setUnavailable(LibFunc_msvc_new_array_int_nothrow);
466     TLI.setUnavailable(LibFunc_msvc_new_array_longlong);
467     TLI.setUnavailable(LibFunc_msvc_new_array_longlong_nothrow);
468     TLI.setUnavailable(LibFunc_msvc_delete_array_ptr32);
469     TLI.setUnavailable(LibFunc_msvc_delete_array_ptr32_nothrow);
470     TLI.setUnavailable(LibFunc_msvc_delete_array_ptr32_int);
471     TLI.setUnavailable(LibFunc_msvc_delete_array_ptr64);
472     TLI.setUnavailable(LibFunc_msvc_delete_array_ptr64_nothrow);
473     TLI.setUnavailable(LibFunc_msvc_delete_array_ptr64_longlong);
474   }
475 
476   switch (T.getOS()) {
477   case Triple::MacOSX:
478     // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0
479     // and their names are __exp10 and __exp10f. exp10l is not available on
480     // OS X or iOS.
481     TLI.setUnavailable(LibFunc_exp10l);
482     if (T.isMacOSXVersionLT(10, 9)) {
483       TLI.setUnavailable(LibFunc_exp10);
484       TLI.setUnavailable(LibFunc_exp10f);
485     } else {
486       TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
487       TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
488     }
489     break;
490   case Triple::IOS:
491   case Triple::TvOS:
492   case Triple::WatchOS:
493     TLI.setUnavailable(LibFunc_exp10l);
494     if (!T.isWatchOS() &&
495         (T.isOSVersionLT(7, 0) || (T.isOSVersionLT(9, 0) && T.isX86()))) {
496       TLI.setUnavailable(LibFunc_exp10);
497       TLI.setUnavailable(LibFunc_exp10f);
498     } else {
499       TLI.setAvailableWithName(LibFunc_exp10, "__exp10");
500       TLI.setAvailableWithName(LibFunc_exp10f, "__exp10f");
501     }
502     break;
503   case Triple::Linux:
504     // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
505     // buggy prior to glibc version 2.18. Until this version is widely deployed
506     // or we have a reasonable detection strategy, we cannot use exp10 reliably
507     // on Linux.
508     //
509     // Fall through to disable all of them.
510     LLVM_FALLTHROUGH;
511   default:
512     TLI.setUnavailable(LibFunc_exp10);
513     TLI.setUnavailable(LibFunc_exp10f);
514     TLI.setUnavailable(LibFunc_exp10l);
515   }
516 
517   // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
518   // Linux (GLIBC):
519   // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
520   // http://svn.freebsd.org/base/head/lib/libc/string/ffsl.c
521   // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
522   switch (T.getOS()) {
523   case Triple::Darwin:
524   case Triple::MacOSX:
525   case Triple::IOS:
526   case Triple::TvOS:
527   case Triple::WatchOS:
528   case Triple::FreeBSD:
529   case Triple::Linux:
530     break;
531   default:
532     TLI.setUnavailable(LibFunc_ffsl);
533   }
534 
535   // ffsll is available on at least FreeBSD and Linux (GLIBC):
536   // http://svn.freebsd.org/base/head/lib/libc/string/ffsll.c
537   // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
538   switch (T.getOS()) {
539   case Triple::Darwin:
540   case Triple::MacOSX:
541   case Triple::IOS:
542   case Triple::TvOS:
543   case Triple::WatchOS:
544   case Triple::FreeBSD:
545   case Triple::Linux:
546     break;
547   default:
548     TLI.setUnavailable(LibFunc_ffsll);
549   }
550 
551   // The following functions are available on at least FreeBSD:
552   // http://svn.freebsd.org/base/head/lib/libc/string/fls.c
553   // http://svn.freebsd.org/base/head/lib/libc/string/flsl.c
554   // http://svn.freebsd.org/base/head/lib/libc/string/flsll.c
555   if (!T.isOSFreeBSD()) {
556     TLI.setUnavailable(LibFunc_fls);
557     TLI.setUnavailable(LibFunc_flsl);
558     TLI.setUnavailable(LibFunc_flsll);
559   }
560 
561   // The following functions are only available on GNU/Linux (using glibc).
562   // Linux variants without glibc (eg: bionic, musl) may have some subset.
563   if (!T.isOSLinux() || !T.isGNUEnvironment()) {
564     TLI.setUnavailable(LibFunc_dunder_strdup);
565     TLI.setUnavailable(LibFunc_dunder_strtok_r);
566     TLI.setUnavailable(LibFunc_dunder_isoc99_scanf);
567     TLI.setUnavailable(LibFunc_dunder_isoc99_sscanf);
568     TLI.setUnavailable(LibFunc_under_IO_getc);
569     TLI.setUnavailable(LibFunc_under_IO_putc);
570     // But, Android and musl have memalign.
571     if (!T.isAndroid() && !T.isMusl())
572       TLI.setUnavailable(LibFunc_memalign);
573     TLI.setUnavailable(LibFunc_fopen64);
574     TLI.setUnavailable(LibFunc_fseeko64);
575     TLI.setUnavailable(LibFunc_fstat64);
576     TLI.setUnavailable(LibFunc_fstatvfs64);
577     TLI.setUnavailable(LibFunc_ftello64);
578     TLI.setUnavailable(LibFunc_lstat64);
579     TLI.setUnavailable(LibFunc_open64);
580     TLI.setUnavailable(LibFunc_stat64);
581     TLI.setUnavailable(LibFunc_statvfs64);
582     TLI.setUnavailable(LibFunc_tmpfile64);
583 
584     // Relaxed math functions are included in math-finite.h on Linux (GLIBC).
585     // Note that math-finite.h is no longer supported by top-of-tree GLIBC,
586     // so we keep these functions around just so that they're recognized by
587     // the ConstantFolder.
588     TLI.setUnavailable(LibFunc_acos_finite);
589     TLI.setUnavailable(LibFunc_acosf_finite);
590     TLI.setUnavailable(LibFunc_acosl_finite);
591     TLI.setUnavailable(LibFunc_acosh_finite);
592     TLI.setUnavailable(LibFunc_acoshf_finite);
593     TLI.setUnavailable(LibFunc_acoshl_finite);
594     TLI.setUnavailable(LibFunc_asin_finite);
595     TLI.setUnavailable(LibFunc_asinf_finite);
596     TLI.setUnavailable(LibFunc_asinl_finite);
597     TLI.setUnavailable(LibFunc_atan2_finite);
598     TLI.setUnavailable(LibFunc_atan2f_finite);
599     TLI.setUnavailable(LibFunc_atan2l_finite);
600     TLI.setUnavailable(LibFunc_atanh_finite);
601     TLI.setUnavailable(LibFunc_atanhf_finite);
602     TLI.setUnavailable(LibFunc_atanhl_finite);
603     TLI.setUnavailable(LibFunc_cosh_finite);
604     TLI.setUnavailable(LibFunc_coshf_finite);
605     TLI.setUnavailable(LibFunc_coshl_finite);
606     TLI.setUnavailable(LibFunc_exp10_finite);
607     TLI.setUnavailable(LibFunc_exp10f_finite);
608     TLI.setUnavailable(LibFunc_exp10l_finite);
609     TLI.setUnavailable(LibFunc_exp2_finite);
610     TLI.setUnavailable(LibFunc_exp2f_finite);
611     TLI.setUnavailable(LibFunc_exp2l_finite);
612     TLI.setUnavailable(LibFunc_exp_finite);
613     TLI.setUnavailable(LibFunc_expf_finite);
614     TLI.setUnavailable(LibFunc_expl_finite);
615     TLI.setUnavailable(LibFunc_log10_finite);
616     TLI.setUnavailable(LibFunc_log10f_finite);
617     TLI.setUnavailable(LibFunc_log10l_finite);
618     TLI.setUnavailable(LibFunc_log2_finite);
619     TLI.setUnavailable(LibFunc_log2f_finite);
620     TLI.setUnavailable(LibFunc_log2l_finite);
621     TLI.setUnavailable(LibFunc_log_finite);
622     TLI.setUnavailable(LibFunc_logf_finite);
623     TLI.setUnavailable(LibFunc_logl_finite);
624     TLI.setUnavailable(LibFunc_pow_finite);
625     TLI.setUnavailable(LibFunc_powf_finite);
626     TLI.setUnavailable(LibFunc_powl_finite);
627     TLI.setUnavailable(LibFunc_sinh_finite);
628     TLI.setUnavailable(LibFunc_sinhf_finite);
629     TLI.setUnavailable(LibFunc_sinhl_finite);
630     TLI.setUnavailable(LibFunc_sqrt_finite);
631     TLI.setUnavailable(LibFunc_sqrtf_finite);
632     TLI.setUnavailable(LibFunc_sqrtl_finite);
633   }
634 
635   if ((T.isOSLinux() && T.isGNUEnvironment()) ||
636       (T.isAndroid() && !T.isAndroidVersionLT(28))) {
637     // available IO unlocked variants on GNU/Linux and Android P or later
638     TLI.setAvailable(LibFunc_getc_unlocked);
639     TLI.setAvailable(LibFunc_getchar_unlocked);
640     TLI.setAvailable(LibFunc_putc_unlocked);
641     TLI.setAvailable(LibFunc_putchar_unlocked);
642     TLI.setAvailable(LibFunc_fputc_unlocked);
643     TLI.setAvailable(LibFunc_fgetc_unlocked);
644     TLI.setAvailable(LibFunc_fread_unlocked);
645     TLI.setAvailable(LibFunc_fwrite_unlocked);
646     TLI.setAvailable(LibFunc_fputs_unlocked);
647     TLI.setAvailable(LibFunc_fgets_unlocked);
648   }
649 
650   if (T.isAndroid() && T.isAndroidVersionLT(21)) {
651     TLI.setUnavailable(LibFunc_stpcpy);
652     TLI.setUnavailable(LibFunc_stpncpy);
653   }
654 
655   if (T.isPS4()) {
656     // PS4 does have memalign.
657     TLI.setAvailable(LibFunc_memalign);
658 
659     // PS4 does not have new/delete with "unsigned int" size parameter;
660     // it only has the "unsigned long" versions.
661     TLI.setUnavailable(LibFunc_ZdaPvj);
662     TLI.setUnavailable(LibFunc_ZdaPvjSt11align_val_t);
663     TLI.setUnavailable(LibFunc_ZdlPvj);
664     TLI.setUnavailable(LibFunc_ZdlPvjSt11align_val_t);
665     TLI.setUnavailable(LibFunc_Znaj);
666     TLI.setUnavailable(LibFunc_ZnajRKSt9nothrow_t);
667     TLI.setUnavailable(LibFunc_ZnajSt11align_val_t);
668     TLI.setUnavailable(LibFunc_ZnajSt11align_val_tRKSt9nothrow_t);
669     TLI.setUnavailable(LibFunc_Znwj);
670     TLI.setUnavailable(LibFunc_ZnwjRKSt9nothrow_t);
671     TLI.setUnavailable(LibFunc_ZnwjSt11align_val_t);
672     TLI.setUnavailable(LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t);
673 
674     // None of the *_chk functions.
675     TLI.setUnavailable(LibFunc_memccpy_chk);
676     TLI.setUnavailable(LibFunc_memcpy_chk);
677     TLI.setUnavailable(LibFunc_memmove_chk);
678     TLI.setUnavailable(LibFunc_mempcpy_chk);
679     TLI.setUnavailable(LibFunc_memset_chk);
680     TLI.setUnavailable(LibFunc_snprintf_chk);
681     TLI.setUnavailable(LibFunc_sprintf_chk);
682     TLI.setUnavailable(LibFunc_stpcpy_chk);
683     TLI.setUnavailable(LibFunc_stpncpy_chk);
684     TLI.setUnavailable(LibFunc_strcat_chk);
685     TLI.setUnavailable(LibFunc_strcpy_chk);
686     TLI.setUnavailable(LibFunc_strlcat_chk);
687     TLI.setUnavailable(LibFunc_strlcpy_chk);
688     TLI.setUnavailable(LibFunc_strlen_chk);
689     TLI.setUnavailable(LibFunc_strncat_chk);
690     TLI.setUnavailable(LibFunc_strncpy_chk);
691     TLI.setUnavailable(LibFunc_vsnprintf_chk);
692     TLI.setUnavailable(LibFunc_vsprintf_chk);
693 
694     // Various Posix system functions.
695     TLI.setUnavailable(LibFunc_access);
696     TLI.setUnavailable(LibFunc_chmod);
697     TLI.setUnavailable(LibFunc_chown);
698     TLI.setUnavailable(LibFunc_closedir);
699     TLI.setUnavailable(LibFunc_ctermid);
700     TLI.setUnavailable(LibFunc_execl);
701     TLI.setUnavailable(LibFunc_execle);
702     TLI.setUnavailable(LibFunc_execlp);
703     TLI.setUnavailable(LibFunc_execv);
704     TLI.setUnavailable(LibFunc_execvP);
705     TLI.setUnavailable(LibFunc_execve);
706     TLI.setUnavailable(LibFunc_execvp);
707     TLI.setUnavailable(LibFunc_execvpe);
708     TLI.setUnavailable(LibFunc_fork);
709     TLI.setUnavailable(LibFunc_fstat);
710     TLI.setUnavailable(LibFunc_fstatvfs);
711     TLI.setUnavailable(LibFunc_getenv);
712     TLI.setUnavailable(LibFunc_getitimer);
713     TLI.setUnavailable(LibFunc_getlogin_r);
714     TLI.setUnavailable(LibFunc_getpwnam);
715     TLI.setUnavailable(LibFunc_gettimeofday);
716     TLI.setUnavailable(LibFunc_lchown);
717     TLI.setUnavailable(LibFunc_lstat);
718     TLI.setUnavailable(LibFunc_mkdir);
719     TLI.setUnavailable(LibFunc_open);
720     TLI.setUnavailable(LibFunc_opendir);
721     TLI.setUnavailable(LibFunc_pclose);
722     TLI.setUnavailable(LibFunc_popen);
723     TLI.setUnavailable(LibFunc_pread);
724     TLI.setUnavailable(LibFunc_pwrite);
725     TLI.setUnavailable(LibFunc_read);
726     TLI.setUnavailable(LibFunc_readlink);
727     TLI.setUnavailable(LibFunc_realpath);
728     TLI.setUnavailable(LibFunc_rename);
729     TLI.setUnavailable(LibFunc_rmdir);
730     TLI.setUnavailable(LibFunc_setitimer);
731     TLI.setUnavailable(LibFunc_stat);
732     TLI.setUnavailable(LibFunc_statvfs);
733     TLI.setUnavailable(LibFunc_system);
734     TLI.setUnavailable(LibFunc_times);
735     TLI.setUnavailable(LibFunc_tmpfile);
736     TLI.setUnavailable(LibFunc_unlink);
737     TLI.setUnavailable(LibFunc_uname);
738     TLI.setUnavailable(LibFunc_unsetenv);
739     TLI.setUnavailable(LibFunc_utime);
740     TLI.setUnavailable(LibFunc_utimes);
741     TLI.setUnavailable(LibFunc_valloc);
742     TLI.setUnavailable(LibFunc_write);
743 
744     // Miscellaneous other functions not provided.
745     TLI.setUnavailable(LibFunc_atomic_load);
746     TLI.setUnavailable(LibFunc_atomic_store);
747     TLI.setUnavailable(LibFunc___kmpc_alloc_shared);
748     TLI.setUnavailable(LibFunc___kmpc_free_shared);
749     TLI.setUnavailable(LibFunc_dunder_strndup);
750     TLI.setUnavailable(LibFunc_bcmp);
751     TLI.setUnavailable(LibFunc_bcopy);
752     TLI.setUnavailable(LibFunc_bzero);
753     TLI.setUnavailable(LibFunc_cabs);
754     TLI.setUnavailable(LibFunc_cabsf);
755     TLI.setUnavailable(LibFunc_cabsl);
756     TLI.setUnavailable(LibFunc_ffs);
757     TLI.setUnavailable(LibFunc_flockfile);
758     TLI.setUnavailable(LibFunc_fseeko);
759     TLI.setUnavailable(LibFunc_ftello);
760     TLI.setUnavailable(LibFunc_ftrylockfile);
761     TLI.setUnavailable(LibFunc_funlockfile);
762     TLI.setUnavailable(LibFunc_htonl);
763     TLI.setUnavailable(LibFunc_htons);
764     TLI.setUnavailable(LibFunc_isascii);
765     TLI.setUnavailable(LibFunc_memccpy);
766     TLI.setUnavailable(LibFunc_mempcpy);
767     TLI.setUnavailable(LibFunc_memrchr);
768     TLI.setUnavailable(LibFunc_ntohl);
769     TLI.setUnavailable(LibFunc_ntohs);
770     TLI.setUnavailable(LibFunc_reallocf);
771     TLI.setUnavailable(LibFunc_roundeven);
772     TLI.setUnavailable(LibFunc_roundevenf);
773     TLI.setUnavailable(LibFunc_roundevenl);
774     TLI.setUnavailable(LibFunc_stpcpy);
775     TLI.setUnavailable(LibFunc_stpncpy);
776     TLI.setUnavailable(LibFunc_strlcat);
777     TLI.setUnavailable(LibFunc_strlcpy);
778     TLI.setUnavailable(LibFunc_strndup);
779     TLI.setUnavailable(LibFunc_strnlen);
780     TLI.setUnavailable(LibFunc_toascii);
781   }
782 
783   // As currently implemented in clang, NVPTX code has no standard library to
784   // speak of.  Headers provide a standard-ish library implementation, but many
785   // of the signatures are wrong -- for example, many libm functions are not
786   // extern "C".
787   //
788   // libdevice, an IR library provided by nvidia, is linked in by the front-end,
789   // but only used functions are provided to llvm.  Moreover, most of the
790   // functions in libdevice don't map precisely to standard library functions.
791   //
792   // FIXME: Having no standard library prevents e.g. many fastmath
793   // optimizations, so this situation should be fixed.
794   if (T.isNVPTX()) {
795     TLI.disableAllFunctions();
796     TLI.setAvailable(LibFunc_nvvm_reflect);
797     TLI.setAvailable(llvm::LibFunc_malloc);
798     TLI.setAvailable(llvm::LibFunc_free);
799 
800     // TODO: We could enable the following two according to [0] but we haven't
801     //       done an evaluation wrt. the performance implications.
802     // [0]
803     // https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#dynamic-global-memory-allocation-and-operations
804     //
805     //    TLI.setAvailable(llvm::LibFunc_memcpy);
806     //    TLI.setAvailable(llvm::LibFunc_memset);
807 
808     TLI.setAvailable(llvm::LibFunc___kmpc_alloc_shared);
809     TLI.setAvailable(llvm::LibFunc___kmpc_free_shared);
810   } else {
811     TLI.setUnavailable(LibFunc_nvvm_reflect);
812   }
813 
814   // These vec_malloc/free routines are only available on AIX.
815   if (!T.isOSAIX()) {
816     TLI.setUnavailable(LibFunc_vec_calloc);
817     TLI.setUnavailable(LibFunc_vec_malloc);
818     TLI.setUnavailable(LibFunc_vec_realloc);
819     TLI.setUnavailable(LibFunc_vec_free);
820   }
821 
822   TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
823 }
824 
825 TargetLibraryInfoImpl::TargetLibraryInfoImpl() {
826   // Default to everything being available.
827   memset(AvailableArray, -1, sizeof(AvailableArray));
828 
829   initialize(*this, Triple(), StandardNames);
830 }
831 
832 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) {
833   // Default to everything being available.
834   memset(AvailableArray, -1, sizeof(AvailableArray));
835 
836   initialize(*this, T, StandardNames);
837 }
838 
839 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI)
840     : CustomNames(TLI.CustomNames), ShouldExtI32Param(TLI.ShouldExtI32Param),
841       ShouldExtI32Return(TLI.ShouldExtI32Return),
842       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param),
843       SizeOfInt(TLI.SizeOfInt) {
844   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
845   VectorDescs = TLI.VectorDescs;
846   ScalarDescs = TLI.ScalarDescs;
847 }
848 
849 TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI)
850     : CustomNames(std::move(TLI.CustomNames)),
851       ShouldExtI32Param(TLI.ShouldExtI32Param),
852       ShouldExtI32Return(TLI.ShouldExtI32Return),
853       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param),
854       SizeOfInt(TLI.SizeOfInt) {
855   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
856             AvailableArray);
857   VectorDescs = TLI.VectorDescs;
858   ScalarDescs = TLI.ScalarDescs;
859 }
860 
861 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) {
862   CustomNames = TLI.CustomNames;
863   ShouldExtI32Param = TLI.ShouldExtI32Param;
864   ShouldExtI32Return = TLI.ShouldExtI32Return;
865   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
866   SizeOfInt = TLI.SizeOfInt;
867   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
868   return *this;
869 }
870 
871 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) {
872   CustomNames = std::move(TLI.CustomNames);
873   ShouldExtI32Param = TLI.ShouldExtI32Param;
874   ShouldExtI32Return = TLI.ShouldExtI32Return;
875   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
876   SizeOfInt = TLI.SizeOfInt;
877   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
878             AvailableArray);
879   return *this;
880 }
881 
882 static StringRef sanitizeFunctionName(StringRef funcName) {
883   // Filter out empty names and names containing null bytes, those can't be in
884   // our table.
885   if (funcName.empty() || funcName.contains('\0'))
886     return StringRef();
887 
888   // Check for \01 prefix that is used to mangle __asm declarations and
889   // strip it if present.
890   return GlobalValue::dropLLVMManglingEscape(funcName);
891 }
892 
893 bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName, LibFunc &F) const {
894   funcName = sanitizeFunctionName(funcName);
895   if (funcName.empty())
896     return false;
897 
898   const auto *Start = std::begin(StandardNames);
899   const auto *End = std::end(StandardNames);
900   const auto *I = std::lower_bound(Start, End, funcName);
901   if (I != End && *I == funcName) {
902     F = (LibFunc)(I - Start);
903     return true;
904   }
905   return false;
906 }
907 
908 bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy,
909                                                    LibFunc F,
910                                                    const Module &M) const {
911   // FIXME: There is really no guarantee that sizeof(size_t) is equal to
912   // sizeof(int*) for every target. So the assumption used here to derive the
913   // SizeTBits based on the size of an integer pointer in address space zero
914   // isn't always valid.
915   unsigned SizeTBits = M.getDataLayout().getPointerSizeInBits(/*AddrSpace=*/0);
916   unsigned NumParams = FTy.getNumParams();
917 
918   switch (F) {
919   case LibFunc_execl:
920   case LibFunc_execlp:
921   case LibFunc_execle:
922     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
923             FTy.getParamType(1)->isPointerTy() &&
924             FTy.getReturnType()->isIntegerTy(32));
925   case LibFunc_execv:
926   case LibFunc_execvp:
927     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
928             FTy.getParamType(1)->isPointerTy() &&
929             FTy.getReturnType()->isIntegerTy(32));
930   case LibFunc_execvP:
931   case LibFunc_execvpe:
932   case LibFunc_execve:
933     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
934             FTy.getParamType(1)->isPointerTy() &&
935             FTy.getParamType(2)->isPointerTy() &&
936             FTy.getReturnType()->isIntegerTy(32));
937   case LibFunc_strlen_chk:
938     --NumParams;
939     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
940       return false;
941     LLVM_FALLTHROUGH;
942   case LibFunc_strlen:
943     return NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
944            FTy.getReturnType()->isIntegerTy(SizeTBits);
945 
946   case LibFunc_strchr:
947   case LibFunc_strrchr:
948     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
949             FTy.getParamType(0) == FTy.getReturnType() &&
950             FTy.getParamType(1)->isIntegerTy());
951 
952   case LibFunc_strtol:
953   case LibFunc_strtod:
954   case LibFunc_strtof:
955   case LibFunc_strtoul:
956   case LibFunc_strtoll:
957   case LibFunc_strtold:
958   case LibFunc_strtoull:
959     return ((NumParams == 2 || NumParams == 3) &&
960             FTy.getParamType(0)->isPointerTy() &&
961             FTy.getParamType(1)->isPointerTy());
962   case LibFunc_strcat_chk:
963     --NumParams;
964     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
965       return false;
966     LLVM_FALLTHROUGH;
967   case LibFunc_strcat:
968     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
969             FTy.getParamType(0) == FTy.getReturnType() &&
970             FTy.getParamType(1) == FTy.getReturnType());
971 
972   case LibFunc_strncat_chk:
973     --NumParams;
974     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
975       return false;
976     LLVM_FALLTHROUGH;
977   case LibFunc_strncat:
978     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
979             FTy.getParamType(0) == FTy.getReturnType() &&
980             FTy.getParamType(1) == FTy.getReturnType() &&
981             FTy.getParamType(2)->isIntegerTy(SizeTBits));
982 
983   case LibFunc_strcpy_chk:
984   case LibFunc_stpcpy_chk:
985     --NumParams;
986     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
987       return false;
988     LLVM_FALLTHROUGH;
989   case LibFunc_strcpy:
990   case LibFunc_stpcpy:
991     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(0) &&
992             FTy.getParamType(0) == FTy.getParamType(1) &&
993             FTy.getParamType(0)->isPointerTy());
994 
995   case LibFunc_strlcat_chk:
996   case LibFunc_strlcpy_chk:
997     --NumParams;
998     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
999       return false;
1000     LLVM_FALLTHROUGH;
1001   case LibFunc_strlcat:
1002   case LibFunc_strlcpy:
1003     return NumParams == 3 && FTy.getReturnType()->isIntegerTy(SizeTBits) &&
1004            FTy.getParamType(0)->isPointerTy() &&
1005            FTy.getParamType(1)->isPointerTy() &&
1006            FTy.getParamType(2)->isIntegerTy(SizeTBits);
1007 
1008   case LibFunc_strncpy_chk:
1009   case LibFunc_stpncpy_chk:
1010     --NumParams;
1011     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1012       return false;
1013     LLVM_FALLTHROUGH;
1014   case LibFunc_strncpy:
1015   case LibFunc_stpncpy:
1016     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
1017             FTy.getParamType(0) == FTy.getParamType(1) &&
1018             FTy.getParamType(0)->isPointerTy() &&
1019             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1020 
1021   case LibFunc_strxfrm:
1022     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1023             FTy.getParamType(1)->isPointerTy());
1024 
1025   case LibFunc_strcmp:
1026     return (NumParams == 2 && FTy.getReturnType()->isIntegerTy(32) &&
1027             FTy.getParamType(0)->isPointerTy() &&
1028             FTy.getParamType(0) == FTy.getParamType(1));
1029 
1030   case LibFunc_strncmp:
1031     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1032             FTy.getParamType(0)->isPointerTy() &&
1033             FTy.getParamType(0) == FTy.getParamType(1) &&
1034             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1035 
1036   case LibFunc_strspn:
1037   case LibFunc_strcspn:
1038     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1039             FTy.getParamType(0) == FTy.getParamType(1) &&
1040             FTy.getReturnType()->isIntegerTy());
1041 
1042   case LibFunc_strcoll:
1043   case LibFunc_strcasecmp:
1044   case LibFunc_strncasecmp:
1045     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1046             FTy.getParamType(1)->isPointerTy());
1047 
1048   case LibFunc_strstr:
1049     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1050             FTy.getParamType(0)->isPointerTy() &&
1051             FTy.getParamType(1)->isPointerTy());
1052 
1053   case LibFunc_strpbrk:
1054     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1055             FTy.getReturnType() == FTy.getParamType(0) &&
1056             FTy.getParamType(0) == FTy.getParamType(1));
1057 
1058   case LibFunc_strtok:
1059   case LibFunc_strtok_r:
1060     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
1061   case LibFunc_scanf:
1062   case LibFunc_setbuf:
1063   case LibFunc_setvbuf:
1064     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1065   case LibFunc_strdup:
1066   case LibFunc_strndup:
1067     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
1068             FTy.getParamType(0)->isPointerTy());
1069   case LibFunc_sscanf:
1070   case LibFunc_stat:
1071   case LibFunc_statvfs:
1072   case LibFunc_siprintf:
1073   case LibFunc_small_sprintf:
1074   case LibFunc_sprintf:
1075     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1076             FTy.getParamType(1)->isPointerTy() &&
1077             FTy.getReturnType()->isIntegerTy(32));
1078 
1079   case LibFunc_sprintf_chk:
1080     return NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1081            FTy.getParamType(1)->isIntegerTy(32) &&
1082            FTy.getParamType(2)->isIntegerTy(SizeTBits) &&
1083            FTy.getParamType(3)->isPointerTy() &&
1084            FTy.getReturnType()->isIntegerTy(32);
1085 
1086   case LibFunc_snprintf:
1087     return NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1088            FTy.getParamType(1)->isIntegerTy(SizeTBits) &&
1089            FTy.getParamType(2)->isPointerTy() &&
1090            FTy.getReturnType()->isIntegerTy(32);
1091 
1092   case LibFunc_snprintf_chk:
1093     return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
1094            FTy.getParamType(1)->isIntegerTy(SizeTBits) &&
1095            FTy.getParamType(2)->isIntegerTy(32) &&
1096            FTy.getParamType(3)->isIntegerTy(SizeTBits) &&
1097            FTy.getParamType(4)->isPointerTy() &&
1098            FTy.getReturnType()->isIntegerTy(32);
1099 
1100   case LibFunc_setitimer:
1101     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1102             FTy.getParamType(2)->isPointerTy());
1103   case LibFunc_system:
1104     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1105   case LibFunc___kmpc_alloc_shared:
1106   case LibFunc_malloc:
1107   case LibFunc_vec_malloc:
1108     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
1109   case LibFunc_memcmp:
1110     return NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1111            FTy.getParamType(0)->isPointerTy() &&
1112            FTy.getParamType(1)->isPointerTy() &&
1113            FTy.getParamType(2)->isIntegerTy(SizeTBits);
1114 
1115   case LibFunc_memchr:
1116   case LibFunc_memrchr:
1117     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
1118             FTy.getReturnType() == FTy.getParamType(0) &&
1119             FTy.getParamType(1)->isIntegerTy(32) &&
1120             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1121   case LibFunc_modf:
1122   case LibFunc_modff:
1123   case LibFunc_modfl:
1124     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
1125 
1126   case LibFunc_memcpy_chk:
1127   case LibFunc_mempcpy_chk:
1128   case LibFunc_memmove_chk:
1129     --NumParams;
1130     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1131       return false;
1132     LLVM_FALLTHROUGH;
1133   case LibFunc_memcpy:
1134   case LibFunc_mempcpy:
1135   case LibFunc_memmove:
1136     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
1137             FTy.getParamType(0)->isPointerTy() &&
1138             FTy.getParamType(1)->isPointerTy() &&
1139             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1140 
1141   case LibFunc_memset_chk:
1142     --NumParams;
1143     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1144       return false;
1145     LLVM_FALLTHROUGH;
1146   case LibFunc_memset:
1147     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
1148             FTy.getParamType(0)->isPointerTy() &&
1149             FTy.getParamType(1)->isIntegerTy() &&
1150             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1151 
1152   case LibFunc_memccpy_chk:
1153       --NumParams;
1154     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1155       return false;
1156     LLVM_FALLTHROUGH;
1157   case LibFunc_memccpy:
1158     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
1159   case LibFunc_memalign:
1160     return (FTy.getReturnType()->isPointerTy());
1161   case LibFunc_realloc:
1162   case LibFunc_reallocf:
1163   case LibFunc_vec_realloc:
1164     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1165             FTy.getParamType(0) == FTy.getReturnType() &&
1166             FTy.getParamType(1)->isIntegerTy(SizeTBits));
1167   case LibFunc_read:
1168     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1169   case LibFunc_rewind:
1170   case LibFunc_rmdir:
1171   case LibFunc_remove:
1172   case LibFunc_realpath:
1173     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1174   case LibFunc_rename:
1175     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1176             FTy.getParamType(1)->isPointerTy());
1177   case LibFunc_readlink:
1178     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1179             FTy.getParamType(1)->isPointerTy());
1180   case LibFunc_write:
1181     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1182   case LibFunc_aligned_alloc:
1183     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
1184   case LibFunc_bcopy:
1185   case LibFunc_bcmp:
1186     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1187             FTy.getParamType(1)->isPointerTy());
1188   case LibFunc_bzero:
1189     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1190   case LibFunc_calloc:
1191   case LibFunc_vec_calloc:
1192     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1193             FTy.getParamType(0) == FTy.getParamType(1));
1194 
1195   case LibFunc_atof:
1196   case LibFunc_atoi:
1197   case LibFunc_atol:
1198   case LibFunc_atoll:
1199   case LibFunc_ferror:
1200   case LibFunc_getenv:
1201   case LibFunc_getpwnam:
1202   case LibFunc_iprintf:
1203   case LibFunc_small_printf:
1204   case LibFunc_pclose:
1205   case LibFunc_perror:
1206   case LibFunc_printf:
1207   case LibFunc_puts:
1208   case LibFunc_uname:
1209   case LibFunc_under_IO_getc:
1210   case LibFunc_unlink:
1211   case LibFunc_unsetenv:
1212     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1213 
1214   case LibFunc_access:
1215   case LibFunc_chmod:
1216   case LibFunc_chown:
1217   case LibFunc_clearerr:
1218   case LibFunc_closedir:
1219   case LibFunc_ctermid:
1220   case LibFunc_fclose:
1221   case LibFunc_feof:
1222   case LibFunc_fflush:
1223   case LibFunc_fgetc:
1224   case LibFunc_fgetc_unlocked:
1225   case LibFunc_fileno:
1226   case LibFunc_flockfile:
1227   case LibFunc_free:
1228   case LibFunc_fseek:
1229   case LibFunc_fseeko64:
1230   case LibFunc_fseeko:
1231   case LibFunc_fsetpos:
1232   case LibFunc_ftell:
1233   case LibFunc_ftello64:
1234   case LibFunc_ftello:
1235   case LibFunc_ftrylockfile:
1236   case LibFunc_funlockfile:
1237   case LibFunc_getc:
1238   case LibFunc_getc_unlocked:
1239   case LibFunc_getlogin_r:
1240   case LibFunc_mkdir:
1241   case LibFunc_mktime:
1242   case LibFunc_times:
1243   case LibFunc_vec_free:
1244     return (NumParams != 0 && FTy.getParamType(0)->isPointerTy());
1245   case LibFunc___kmpc_free_shared:
1246     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1247             FTy.getParamType(1)->isIntegerTy(SizeTBits));
1248 
1249   case LibFunc_fopen:
1250     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1251             FTy.getParamType(0)->isPointerTy() &&
1252             FTy.getParamType(1)->isPointerTy());
1253   case LibFunc_fork:
1254     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy(32));
1255   case LibFunc_fdopen:
1256     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1257             FTy.getParamType(1)->isPointerTy());
1258   case LibFunc_fputc:
1259   case LibFunc_fputc_unlocked:
1260   case LibFunc_fstat:
1261   case LibFunc_frexp:
1262   case LibFunc_frexpf:
1263   case LibFunc_frexpl:
1264   case LibFunc_fstatvfs:
1265     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1266   case LibFunc_fgets:
1267   case LibFunc_fgets_unlocked:
1268     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1269             FTy.getParamType(2)->isPointerTy());
1270   case LibFunc_fread:
1271   case LibFunc_fread_unlocked:
1272     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1273             FTy.getParamType(3)->isPointerTy());
1274   case LibFunc_fwrite:
1275   case LibFunc_fwrite_unlocked:
1276     return (NumParams == 4 && FTy.getReturnType()->isIntegerTy() &&
1277             FTy.getParamType(0)->isPointerTy() &&
1278             FTy.getParamType(1)->isIntegerTy() &&
1279             FTy.getParamType(2)->isIntegerTy() &&
1280             FTy.getParamType(3)->isPointerTy());
1281   case LibFunc_fputs:
1282   case LibFunc_fputs_unlocked:
1283     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1284             FTy.getParamType(1)->isPointerTy());
1285   case LibFunc_fscanf:
1286   case LibFunc_fiprintf:
1287   case LibFunc_small_fprintf:
1288   case LibFunc_fprintf:
1289     return (NumParams >= 2 && FTy.getReturnType()->isIntegerTy() &&
1290             FTy.getParamType(0)->isPointerTy() &&
1291             FTy.getParamType(1)->isPointerTy());
1292   case LibFunc_fgetpos:
1293     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1294             FTy.getParamType(1)->isPointerTy());
1295   case LibFunc_getchar:
1296   case LibFunc_getchar_unlocked:
1297     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy());
1298   case LibFunc_gets:
1299     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1300   case LibFunc_getitimer:
1301     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1302   case LibFunc_ungetc:
1303     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1304   case LibFunc_utime:
1305   case LibFunc_utimes:
1306     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1307             FTy.getParamType(1)->isPointerTy());
1308   case LibFunc_putc:
1309   case LibFunc_putc_unlocked:
1310     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1311   case LibFunc_pread:
1312   case LibFunc_pwrite:
1313     return (NumParams == 4 && FTy.getParamType(1)->isPointerTy());
1314   case LibFunc_popen:
1315     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1316             FTy.getParamType(0)->isPointerTy() &&
1317             FTy.getParamType(1)->isPointerTy());
1318   case LibFunc_vscanf:
1319     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1320   case LibFunc_vsscanf:
1321     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1322             FTy.getParamType(2)->isPointerTy());
1323   case LibFunc_vfscanf:
1324     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1325             FTy.getParamType(2)->isPointerTy());
1326   case LibFunc_valloc:
1327     return (FTy.getReturnType()->isPointerTy());
1328   case LibFunc_vprintf:
1329     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1330   case LibFunc_vfprintf:
1331   case LibFunc_vsprintf:
1332     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1333             FTy.getParamType(1)->isPointerTy());
1334   case LibFunc_vsprintf_chk:
1335     return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
1336            FTy.getParamType(1)->isIntegerTy(32) &&
1337            FTy.getParamType(2)->isIntegerTy(SizeTBits) && FTy.getParamType(3)->isPointerTy();
1338   case LibFunc_vsnprintf:
1339     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1340             FTy.getParamType(2)->isPointerTy());
1341   case LibFunc_vsnprintf_chk:
1342     return NumParams == 6 && FTy.getParamType(0)->isPointerTy() &&
1343            FTy.getParamType(2)->isIntegerTy(32) &&
1344            FTy.getParamType(3)->isIntegerTy(SizeTBits) && FTy.getParamType(4)->isPointerTy();
1345   case LibFunc_open:
1346     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1347   case LibFunc_opendir:
1348     return (NumParams == 1 && FTy.getReturnType()->isPointerTy() &&
1349             FTy.getParamType(0)->isPointerTy());
1350   case LibFunc_tmpfile:
1351     return (FTy.getReturnType()->isPointerTy());
1352   case LibFunc_htonl:
1353   case LibFunc_ntohl:
1354     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1355             FTy.getReturnType() == FTy.getParamType(0));
1356   case LibFunc_htons:
1357   case LibFunc_ntohs:
1358     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(16) &&
1359             FTy.getReturnType() == FTy.getParamType(0));
1360   case LibFunc_lstat:
1361     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1362             FTy.getParamType(1)->isPointerTy());
1363   case LibFunc_lchown:
1364     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1365   case LibFunc_qsort:
1366     return (NumParams == 4 && FTy.getParamType(3)->isPointerTy());
1367   case LibFunc_dunder_strdup:
1368   case LibFunc_dunder_strndup:
1369     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
1370             FTy.getParamType(0)->isPointerTy());
1371   case LibFunc_dunder_strtok_r:
1372     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1373   case LibFunc_under_IO_putc:
1374     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1375   case LibFunc_dunder_isoc99_scanf:
1376     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1377   case LibFunc_stat64:
1378   case LibFunc_lstat64:
1379   case LibFunc_statvfs64:
1380     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1381             FTy.getParamType(1)->isPointerTy());
1382   case LibFunc_dunder_isoc99_sscanf:
1383     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1384             FTy.getParamType(1)->isPointerTy());
1385   case LibFunc_fopen64:
1386     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1387             FTy.getParamType(0)->isPointerTy() &&
1388             FTy.getParamType(1)->isPointerTy());
1389   case LibFunc_tmpfile64:
1390     return (FTy.getReturnType()->isPointerTy());
1391   case LibFunc_fstat64:
1392   case LibFunc_fstatvfs64:
1393     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1394   case LibFunc_open64:
1395     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1396   case LibFunc_gettimeofday:
1397     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1398             FTy.getParamType(1)->isPointerTy());
1399 
1400   // new(unsigned int);
1401   case LibFunc_Znwj:
1402   // new(unsigned long);
1403   case LibFunc_Znwm:
1404   // new[](unsigned int);
1405   case LibFunc_Znaj:
1406   // new[](unsigned long);
1407   case LibFunc_Znam:
1408   // new(unsigned int);
1409   case LibFunc_msvc_new_int:
1410   // new(unsigned long long);
1411   case LibFunc_msvc_new_longlong:
1412   // new[](unsigned int);
1413   case LibFunc_msvc_new_array_int:
1414   // new[](unsigned long long);
1415   case LibFunc_msvc_new_array_longlong:
1416     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
1417 
1418   // new(unsigned int, nothrow);
1419   case LibFunc_ZnwjRKSt9nothrow_t:
1420   // new(unsigned long, nothrow);
1421   case LibFunc_ZnwmRKSt9nothrow_t:
1422   // new[](unsigned int, nothrow);
1423   case LibFunc_ZnajRKSt9nothrow_t:
1424   // new[](unsigned long, nothrow);
1425   case LibFunc_ZnamRKSt9nothrow_t:
1426   // new(unsigned int, nothrow);
1427   case LibFunc_msvc_new_int_nothrow:
1428   // new(unsigned long long, nothrow);
1429   case LibFunc_msvc_new_longlong_nothrow:
1430   // new[](unsigned int, nothrow);
1431   case LibFunc_msvc_new_array_int_nothrow:
1432   // new[](unsigned long long, nothrow);
1433   case LibFunc_msvc_new_array_longlong_nothrow:
1434   // new(unsigned int, align_val_t)
1435   case LibFunc_ZnwjSt11align_val_t:
1436   // new(unsigned long, align_val_t)
1437   case LibFunc_ZnwmSt11align_val_t:
1438   // new[](unsigned int, align_val_t)
1439   case LibFunc_ZnajSt11align_val_t:
1440   // new[](unsigned long, align_val_t)
1441   case LibFunc_ZnamSt11align_val_t:
1442     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
1443 
1444   // new(unsigned int, align_val_t, nothrow)
1445   case LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t:
1446   // new(unsigned long, align_val_t, nothrow)
1447   case LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t:
1448   // new[](unsigned int, align_val_t, nothrow)
1449   case LibFunc_ZnajSt11align_val_tRKSt9nothrow_t:
1450   // new[](unsigned long, align_val_t, nothrow)
1451   case LibFunc_ZnamSt11align_val_tRKSt9nothrow_t:
1452     return (NumParams == 3 && FTy.getReturnType()->isPointerTy());
1453 
1454   // void operator delete[](void*);
1455   case LibFunc_ZdaPv:
1456   // void operator delete(void*);
1457   case LibFunc_ZdlPv:
1458   // void operator delete[](void*);
1459   case LibFunc_msvc_delete_array_ptr32:
1460   // void operator delete[](void*);
1461   case LibFunc_msvc_delete_array_ptr64:
1462   // void operator delete(void*);
1463   case LibFunc_msvc_delete_ptr32:
1464   // void operator delete(void*);
1465   case LibFunc_msvc_delete_ptr64:
1466     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1467 
1468   // void operator delete[](void*, nothrow);
1469   case LibFunc_ZdaPvRKSt9nothrow_t:
1470   // void operator delete[](void*, unsigned int);
1471   case LibFunc_ZdaPvj:
1472   // void operator delete[](void*, unsigned long);
1473   case LibFunc_ZdaPvm:
1474   // void operator delete(void*, nothrow);
1475   case LibFunc_ZdlPvRKSt9nothrow_t:
1476   // void operator delete(void*, unsigned int);
1477   case LibFunc_ZdlPvj:
1478   // void operator delete(void*, unsigned long);
1479   case LibFunc_ZdlPvm:
1480   // void operator delete(void*, align_val_t)
1481   case LibFunc_ZdlPvSt11align_val_t:
1482   // void operator delete[](void*, align_val_t)
1483   case LibFunc_ZdaPvSt11align_val_t:
1484   // void operator delete[](void*, unsigned int);
1485   case LibFunc_msvc_delete_array_ptr32_int:
1486   // void operator delete[](void*, nothrow);
1487   case LibFunc_msvc_delete_array_ptr32_nothrow:
1488   // void operator delete[](void*, unsigned long long);
1489   case LibFunc_msvc_delete_array_ptr64_longlong:
1490   // void operator delete[](void*, nothrow);
1491   case LibFunc_msvc_delete_array_ptr64_nothrow:
1492   // void operator delete(void*, unsigned int);
1493   case LibFunc_msvc_delete_ptr32_int:
1494   // void operator delete(void*, nothrow);
1495   case LibFunc_msvc_delete_ptr32_nothrow:
1496   // void operator delete(void*, unsigned long long);
1497   case LibFunc_msvc_delete_ptr64_longlong:
1498   // void operator delete(void*, nothrow);
1499   case LibFunc_msvc_delete_ptr64_nothrow:
1500     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1501 
1502   // void operator delete(void*, align_val_t, nothrow)
1503   case LibFunc_ZdlPvSt11align_val_tRKSt9nothrow_t:
1504   // void operator delete[](void*, align_val_t, nothrow)
1505   case LibFunc_ZdaPvSt11align_val_tRKSt9nothrow_t:
1506   // void operator delete(void*, unsigned int, align_val_t)
1507   case LibFunc_ZdlPvjSt11align_val_t:
1508   // void operator delete(void*, unsigned long, align_val_t)
1509   case LibFunc_ZdlPvmSt11align_val_t:
1510   // void operator delete[](void*, unsigned int, align_val_t);
1511   case LibFunc_ZdaPvjSt11align_val_t:
1512   // void operator delete[](void*, unsigned long, align_val_t);
1513   case LibFunc_ZdaPvmSt11align_val_t:
1514     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1515 
1516   // void __atomic_load(size_t, void *, void *, int)
1517   case LibFunc_atomic_load:
1518   // void __atomic_store(size_t, void *, void *, int)
1519   case LibFunc_atomic_store:
1520     return (NumParams == 4 && FTy.getParamType(0)->isIntegerTy() &&
1521             FTy.getParamType(1)->isPointerTy() &&
1522             FTy.getParamType(2)->isPointerTy() &&
1523             FTy.getParamType(3)->isIntegerTy());
1524 
1525   case LibFunc_memset_pattern16:
1526     return (!FTy.isVarArg() && NumParams == 3 &&
1527             FTy.getParamType(0)->isPointerTy() &&
1528             FTy.getParamType(1)->isPointerTy() &&
1529             FTy.getParamType(2)->isIntegerTy());
1530 
1531   case LibFunc_cxa_guard_abort:
1532   case LibFunc_cxa_guard_acquire:
1533   case LibFunc_cxa_guard_release:
1534   case LibFunc_nvvm_reflect:
1535     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1536 
1537   case LibFunc_sincospi_stret:
1538   case LibFunc_sincospif_stret:
1539     return (NumParams == 1 && FTy.getParamType(0)->isFloatingPointTy());
1540 
1541   case LibFunc_acos:
1542   case LibFunc_acos_finite:
1543   case LibFunc_acosf:
1544   case LibFunc_acosf_finite:
1545   case LibFunc_acosh:
1546   case LibFunc_acosh_finite:
1547   case LibFunc_acoshf:
1548   case LibFunc_acoshf_finite:
1549   case LibFunc_acoshl:
1550   case LibFunc_acoshl_finite:
1551   case LibFunc_acosl:
1552   case LibFunc_acosl_finite:
1553   case LibFunc_asin:
1554   case LibFunc_asin_finite:
1555   case LibFunc_asinf:
1556   case LibFunc_asinf_finite:
1557   case LibFunc_asinh:
1558   case LibFunc_asinhf:
1559   case LibFunc_asinhl:
1560   case LibFunc_asinl:
1561   case LibFunc_asinl_finite:
1562   case LibFunc_atan:
1563   case LibFunc_atanf:
1564   case LibFunc_atanh:
1565   case LibFunc_atanh_finite:
1566   case LibFunc_atanhf:
1567   case LibFunc_atanhf_finite:
1568   case LibFunc_atanhl:
1569   case LibFunc_atanhl_finite:
1570   case LibFunc_atanl:
1571   case LibFunc_cbrt:
1572   case LibFunc_cbrtf:
1573   case LibFunc_cbrtl:
1574   case LibFunc_ceil:
1575   case LibFunc_ceilf:
1576   case LibFunc_ceill:
1577   case LibFunc_cos:
1578   case LibFunc_cosf:
1579   case LibFunc_cosh:
1580   case LibFunc_cosh_finite:
1581   case LibFunc_coshf:
1582   case LibFunc_coshf_finite:
1583   case LibFunc_coshl:
1584   case LibFunc_coshl_finite:
1585   case LibFunc_cosl:
1586   case LibFunc_exp10:
1587   case LibFunc_exp10_finite:
1588   case LibFunc_exp10f:
1589   case LibFunc_exp10f_finite:
1590   case LibFunc_exp10l:
1591   case LibFunc_exp10l_finite:
1592   case LibFunc_exp2:
1593   case LibFunc_exp2_finite:
1594   case LibFunc_exp2f:
1595   case LibFunc_exp2f_finite:
1596   case LibFunc_exp2l:
1597   case LibFunc_exp2l_finite:
1598   case LibFunc_exp:
1599   case LibFunc_exp_finite:
1600   case LibFunc_expf:
1601   case LibFunc_expf_finite:
1602   case LibFunc_expl:
1603   case LibFunc_expl_finite:
1604   case LibFunc_expm1:
1605   case LibFunc_expm1f:
1606   case LibFunc_expm1l:
1607   case LibFunc_fabs:
1608   case LibFunc_fabsf:
1609   case LibFunc_fabsl:
1610   case LibFunc_floor:
1611   case LibFunc_floorf:
1612   case LibFunc_floorl:
1613   case LibFunc_log10:
1614   case LibFunc_log10_finite:
1615   case LibFunc_log10f:
1616   case LibFunc_log10f_finite:
1617   case LibFunc_log10l:
1618   case LibFunc_log10l_finite:
1619   case LibFunc_log1p:
1620   case LibFunc_log1pf:
1621   case LibFunc_log1pl:
1622   case LibFunc_log2:
1623   case LibFunc_log2_finite:
1624   case LibFunc_log2f:
1625   case LibFunc_log2f_finite:
1626   case LibFunc_log2l:
1627   case LibFunc_log2l_finite:
1628   case LibFunc_log:
1629   case LibFunc_log_finite:
1630   case LibFunc_logb:
1631   case LibFunc_logbf:
1632   case LibFunc_logbl:
1633   case LibFunc_logf:
1634   case LibFunc_logf_finite:
1635   case LibFunc_logl:
1636   case LibFunc_logl_finite:
1637   case LibFunc_nearbyint:
1638   case LibFunc_nearbyintf:
1639   case LibFunc_nearbyintl:
1640   case LibFunc_rint:
1641   case LibFunc_rintf:
1642   case LibFunc_rintl:
1643   case LibFunc_round:
1644   case LibFunc_roundf:
1645   case LibFunc_roundl:
1646   case LibFunc_roundeven:
1647   case LibFunc_roundevenf:
1648   case LibFunc_roundevenl:
1649   case LibFunc_sin:
1650   case LibFunc_sinf:
1651   case LibFunc_sinh:
1652   case LibFunc_sinh_finite:
1653   case LibFunc_sinhf:
1654   case LibFunc_sinhf_finite:
1655   case LibFunc_sinhl:
1656   case LibFunc_sinhl_finite:
1657   case LibFunc_sinl:
1658   case LibFunc_sqrt:
1659   case LibFunc_sqrt_finite:
1660   case LibFunc_sqrtf:
1661   case LibFunc_sqrtf_finite:
1662   case LibFunc_sqrtl:
1663   case LibFunc_sqrtl_finite:
1664   case LibFunc_tan:
1665   case LibFunc_tanf:
1666   case LibFunc_tanh:
1667   case LibFunc_tanhf:
1668   case LibFunc_tanhl:
1669   case LibFunc_tanl:
1670   case LibFunc_trunc:
1671   case LibFunc_truncf:
1672   case LibFunc_truncl:
1673     return (NumParams == 1 && FTy.getReturnType()->isFloatingPointTy() &&
1674             FTy.getReturnType() == FTy.getParamType(0));
1675 
1676   case LibFunc_atan2:
1677   case LibFunc_atan2_finite:
1678   case LibFunc_atan2f:
1679   case LibFunc_atan2f_finite:
1680   case LibFunc_atan2l:
1681   case LibFunc_atan2l_finite:
1682   case LibFunc_fmin:
1683   case LibFunc_fminf:
1684   case LibFunc_fminl:
1685   case LibFunc_fmax:
1686   case LibFunc_fmaxf:
1687   case LibFunc_fmaxl:
1688   case LibFunc_fmod:
1689   case LibFunc_fmodf:
1690   case LibFunc_fmodl:
1691   case LibFunc_remainder:
1692   case LibFunc_remainderf:
1693   case LibFunc_remainderl:
1694   case LibFunc_copysign:
1695   case LibFunc_copysignf:
1696   case LibFunc_copysignl:
1697   case LibFunc_pow:
1698   case LibFunc_pow_finite:
1699   case LibFunc_powf:
1700   case LibFunc_powf_finite:
1701   case LibFunc_powl:
1702   case LibFunc_powl_finite:
1703     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1704             FTy.getReturnType() == FTy.getParamType(0) &&
1705             FTy.getReturnType() == FTy.getParamType(1));
1706 
1707   case LibFunc_ldexp:
1708   case LibFunc_ldexpf:
1709   case LibFunc_ldexpl:
1710     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1711             FTy.getReturnType() == FTy.getParamType(0) &&
1712             FTy.getParamType(1)->isIntegerTy(getIntSize()));
1713 
1714   case LibFunc_ffs:
1715   case LibFunc_ffsl:
1716   case LibFunc_ffsll:
1717   case LibFunc_fls:
1718   case LibFunc_flsl:
1719   case LibFunc_flsll:
1720     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1721             FTy.getParamType(0)->isIntegerTy());
1722 
1723   case LibFunc_isdigit:
1724   case LibFunc_isascii:
1725   case LibFunc_toascii:
1726   case LibFunc_putchar:
1727   case LibFunc_putchar_unlocked:
1728     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1729             FTy.getReturnType() == FTy.getParamType(0));
1730 
1731   case LibFunc_abs:
1732   case LibFunc_labs:
1733   case LibFunc_llabs:
1734     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy() &&
1735             FTy.getReturnType() == FTy.getParamType(0));
1736 
1737   case LibFunc_cxa_atexit:
1738     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy() &&
1739             FTy.getParamType(0)->isPointerTy() &&
1740             FTy.getParamType(1)->isPointerTy() &&
1741             FTy.getParamType(2)->isPointerTy());
1742 
1743   case LibFunc_sinpi:
1744   case LibFunc_cospi:
1745     return (NumParams == 1 && FTy.getReturnType()->isDoubleTy() &&
1746             FTy.getReturnType() == FTy.getParamType(0));
1747 
1748   case LibFunc_sinpif:
1749   case LibFunc_cospif:
1750     return (NumParams == 1 && FTy.getReturnType()->isFloatTy() &&
1751             FTy.getReturnType() == FTy.getParamType(0));
1752 
1753   case LibFunc_strnlen:
1754     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(1) &&
1755             FTy.getParamType(0)->isPointerTy() &&
1756             FTy.getParamType(1)->isIntegerTy(SizeTBits));
1757 
1758   case LibFunc_posix_memalign:
1759     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1760             FTy.getParamType(0)->isPointerTy() &&
1761             FTy.getParamType(1)->isIntegerTy(SizeTBits) &&
1762             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1763 
1764   case LibFunc_wcslen:
1765     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
1766             FTy.getReturnType()->isIntegerTy());
1767 
1768   case LibFunc_cabs:
1769   case LibFunc_cabsf:
1770   case LibFunc_cabsl: {
1771     Type* RetTy = FTy.getReturnType();
1772     if (!RetTy->isFloatingPointTy())
1773       return false;
1774 
1775     // NOTE: These prototypes are target specific and currently support
1776     // "complex" passed as an array or discrete real & imaginary parameters.
1777     // Add other calling conventions to enable libcall optimizations.
1778     if (NumParams == 1)
1779       return (FTy.getParamType(0)->isArrayTy() &&
1780               FTy.getParamType(0)->getArrayNumElements() == 2 &&
1781               FTy.getParamType(0)->getArrayElementType() == RetTy);
1782     else if (NumParams == 2)
1783       return (FTy.getParamType(0) == RetTy && FTy.getParamType(1) == RetTy);
1784     else
1785       return false;
1786   }
1787   case LibFunc::NumLibFuncs:
1788   case LibFunc::NotLibFunc:
1789     break;
1790   }
1791 
1792   llvm_unreachable("Invalid libfunc");
1793 }
1794 
1795 bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl,
1796                                        LibFunc &F) const {
1797   // Intrinsics don't overlap w/libcalls; if our module has a large number of
1798   // intrinsics, this ends up being an interesting compile time win since we
1799   // avoid string normalization and comparison.
1800   if (FDecl.isIntrinsic()) return false;
1801 
1802   const Module *M = FDecl.getParent();
1803   assert(M && "Expecting FDecl to be connected to a Module.");
1804 
1805   return getLibFunc(FDecl.getName(), F) &&
1806          isValidProtoForLibFunc(*FDecl.getFunctionType(), F, *M);
1807 }
1808 
1809 void TargetLibraryInfoImpl::disableAllFunctions() {
1810   memset(AvailableArray, 0, sizeof(AvailableArray));
1811 }
1812 
1813 static bool compareByScalarFnName(const VecDesc &LHS, const VecDesc &RHS) {
1814   return LHS.ScalarFnName < RHS.ScalarFnName;
1815 }
1816 
1817 static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) {
1818   return LHS.VectorFnName < RHS.VectorFnName;
1819 }
1820 
1821 static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) {
1822   return LHS.ScalarFnName < S;
1823 }
1824 
1825 void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) {
1826   llvm::append_range(VectorDescs, Fns);
1827   llvm::sort(VectorDescs, compareByScalarFnName);
1828 
1829   llvm::append_range(ScalarDescs, Fns);
1830   llvm::sort(ScalarDescs, compareByVectorFnName);
1831 }
1832 
1833 void TargetLibraryInfoImpl::addVectorizableFunctionsFromVecLib(
1834     enum VectorLibrary VecLib) {
1835   switch (VecLib) {
1836   case Accelerate: {
1837     const VecDesc VecFuncs[] = {
1838     #define TLI_DEFINE_ACCELERATE_VECFUNCS
1839     #include "llvm/Analysis/VecFuncs.def"
1840     };
1841     addVectorizableFunctions(VecFuncs);
1842     break;
1843   }
1844   case DarwinLibSystemM: {
1845     const VecDesc VecFuncs[] = {
1846     #define TLI_DEFINE_DARWIN_LIBSYSTEM_M_VECFUNCS
1847     #include "llvm/Analysis/VecFuncs.def"
1848     };
1849     addVectorizableFunctions(VecFuncs);
1850     break;
1851   }
1852   case LIBMVEC_X86: {
1853     const VecDesc VecFuncs[] = {
1854     #define TLI_DEFINE_LIBMVEC_X86_VECFUNCS
1855     #include "llvm/Analysis/VecFuncs.def"
1856     };
1857     addVectorizableFunctions(VecFuncs);
1858     break;
1859   }
1860   case MASSV: {
1861     const VecDesc VecFuncs[] = {
1862     #define TLI_DEFINE_MASSV_VECFUNCS
1863     #include "llvm/Analysis/VecFuncs.def"
1864     };
1865     addVectorizableFunctions(VecFuncs);
1866     break;
1867   }
1868   case SVML: {
1869     const VecDesc VecFuncs[] = {
1870     #define TLI_DEFINE_SVML_VECFUNCS
1871     #include "llvm/Analysis/VecFuncs.def"
1872     };
1873     addVectorizableFunctions(VecFuncs);
1874     break;
1875   }
1876   case NoLibrary:
1877     break;
1878   }
1879 }
1880 
1881 bool TargetLibraryInfoImpl::isFunctionVectorizable(StringRef funcName) const {
1882   funcName = sanitizeFunctionName(funcName);
1883   if (funcName.empty())
1884     return false;
1885 
1886   std::vector<VecDesc>::const_iterator I =
1887       llvm::lower_bound(VectorDescs, funcName, compareWithScalarFnName);
1888   return I != VectorDescs.end() && StringRef(I->ScalarFnName) == funcName;
1889 }
1890 
1891 StringRef
1892 TargetLibraryInfoImpl::getVectorizedFunction(StringRef F,
1893                                              const ElementCount &VF) const {
1894   F = sanitizeFunctionName(F);
1895   if (F.empty())
1896     return F;
1897   std::vector<VecDesc>::const_iterator I =
1898       llvm::lower_bound(VectorDescs, F, compareWithScalarFnName);
1899   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == F) {
1900     if (I->VectorizationFactor == VF)
1901       return I->VectorFnName;
1902     ++I;
1903   }
1904   return StringRef();
1905 }
1906 
1907 TargetLibraryInfo TargetLibraryAnalysis::run(const Function &F,
1908                                              FunctionAnalysisManager &) {
1909   if (!BaselineInfoImpl)
1910     BaselineInfoImpl =
1911         TargetLibraryInfoImpl(Triple(F.getParent()->getTargetTriple()));
1912   return TargetLibraryInfo(*BaselineInfoImpl, &F);
1913 }
1914 
1915 unsigned TargetLibraryInfoImpl::getWCharSize(const Module &M) const {
1916   if (auto *ShortWChar = cast_or_null<ConstantAsMetadata>(
1917       M.getModuleFlag("wchar_size")))
1918     return cast<ConstantInt>(ShortWChar->getValue())->getZExtValue();
1919   return 0;
1920 }
1921 
1922 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass()
1923     : ImmutablePass(ID), TLA(TargetLibraryInfoImpl()) {
1924   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1925 }
1926 
1927 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T)
1928     : ImmutablePass(ID), TLA(TargetLibraryInfoImpl(T)) {
1929   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1930 }
1931 
1932 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(
1933     const TargetLibraryInfoImpl &TLIImpl)
1934     : ImmutablePass(ID), TLA(TLIImpl) {
1935   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1936 }
1937 
1938 AnalysisKey TargetLibraryAnalysis::Key;
1939 
1940 // Register the basic pass.
1941 INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo",
1942                 "Target Library Information", false, true)
1943 char TargetLibraryInfoWrapperPass::ID = 0;
1944 
1945 void TargetLibraryInfoWrapperPass::anchor() {}
1946 
1947 void TargetLibraryInfoImpl::getWidestVF(StringRef ScalarF,
1948                                         ElementCount &FixedVF,
1949                                         ElementCount &ScalableVF) const {
1950   ScalarF = sanitizeFunctionName(ScalarF);
1951   // Use '0' here because a type of the form <vscale x 1 x ElTy> is not the
1952   // same as a scalar.
1953   ScalableVF = ElementCount::getScalable(0);
1954   FixedVF = ElementCount::getFixed(1);
1955   if (ScalarF.empty())
1956     return;
1957 
1958   std::vector<VecDesc>::const_iterator I =
1959       llvm::lower_bound(VectorDescs, ScalarF, compareWithScalarFnName);
1960   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == ScalarF) {
1961     ElementCount *VF =
1962         I->VectorizationFactor.isScalable() ? &ScalableVF : &FixedVF;
1963     if (ElementCount::isKnownGT(I->VectorizationFactor, *VF))
1964       *VF = I->VectorizationFactor;
1965     ++I;
1966   }
1967 }
1968