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