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 
hasSinCosPiStret(const Triple & T)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 
hasBcmp(const Triple & TT)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 
isCallingConvCCompatible(CallingConv::ID CC,StringRef TT,FunctionType * FuncTy)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 
isCallingConvCCompatible(CallBase * CI)101 bool TargetLibraryInfoImpl::isCallingConvCCompatible(CallBase *CI) {
102   return ::isCallingConvCCompatible(CI->getCallingConv(),
103                                     CI->getModule()->getTargetTriple(),
104                                     CI->getFunctionType());
105 }
106 
isCallingConvCCompatible(Function * F)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.
initialize(TargetLibraryInfoImpl & TLI,const Triple & T,ArrayRef<StringLiteral> StandardNames)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_strlcat_chk);
688     TLI.setUnavailable(LibFunc_strlcpy_chk);
689     TLI.setUnavailable(LibFunc_strlen_chk);
690     TLI.setUnavailable(LibFunc_strncat_chk);
691     TLI.setUnavailable(LibFunc_strncpy_chk);
692     TLI.setUnavailable(LibFunc_vsnprintf_chk);
693     TLI.setUnavailable(LibFunc_vsprintf_chk);
694 
695     // Various Posix system functions.
696     TLI.setUnavailable(LibFunc_access);
697     TLI.setUnavailable(LibFunc_chmod);
698     TLI.setUnavailable(LibFunc_chown);
699     TLI.setUnavailable(LibFunc_closedir);
700     TLI.setUnavailable(LibFunc_ctermid);
701     TLI.setUnavailable(LibFunc_execl);
702     TLI.setUnavailable(LibFunc_execle);
703     TLI.setUnavailable(LibFunc_execlp);
704     TLI.setUnavailable(LibFunc_execv);
705     TLI.setUnavailable(LibFunc_execvP);
706     TLI.setUnavailable(LibFunc_execve);
707     TLI.setUnavailable(LibFunc_execvp);
708     TLI.setUnavailable(LibFunc_execvpe);
709     TLI.setUnavailable(LibFunc_fork);
710     TLI.setUnavailable(LibFunc_fstat);
711     TLI.setUnavailable(LibFunc_fstatvfs);
712     TLI.setUnavailable(LibFunc_getenv);
713     TLI.setUnavailable(LibFunc_getitimer);
714     TLI.setUnavailable(LibFunc_getlogin_r);
715     TLI.setUnavailable(LibFunc_getpwnam);
716     TLI.setUnavailable(LibFunc_gettimeofday);
717     TLI.setUnavailable(LibFunc_lchown);
718     TLI.setUnavailable(LibFunc_lstat);
719     TLI.setUnavailable(LibFunc_mkdir);
720     TLI.setUnavailable(LibFunc_open);
721     TLI.setUnavailable(LibFunc_opendir);
722     TLI.setUnavailable(LibFunc_pclose);
723     TLI.setUnavailable(LibFunc_popen);
724     TLI.setUnavailable(LibFunc_pread);
725     TLI.setUnavailable(LibFunc_pwrite);
726     TLI.setUnavailable(LibFunc_read);
727     TLI.setUnavailable(LibFunc_readlink);
728     TLI.setUnavailable(LibFunc_realpath);
729     TLI.setUnavailable(LibFunc_rename);
730     TLI.setUnavailable(LibFunc_rmdir);
731     TLI.setUnavailable(LibFunc_setitimer);
732     TLI.setUnavailable(LibFunc_stat);
733     TLI.setUnavailable(LibFunc_statvfs);
734     TLI.setUnavailable(LibFunc_system);
735     TLI.setUnavailable(LibFunc_times);
736     TLI.setUnavailable(LibFunc_tmpfile);
737     TLI.setUnavailable(LibFunc_unlink);
738     TLI.setUnavailable(LibFunc_uname);
739     TLI.setUnavailable(LibFunc_unsetenv);
740     TLI.setUnavailable(LibFunc_utime);
741     TLI.setUnavailable(LibFunc_utimes);
742     TLI.setUnavailable(LibFunc_valloc);
743     TLI.setUnavailable(LibFunc_write);
744 
745     // Miscellaneous other functions not provided.
746     TLI.setUnavailable(LibFunc_atomic_load);
747     TLI.setUnavailable(LibFunc_atomic_store);
748     TLI.setUnavailable(LibFunc___kmpc_alloc_shared);
749     TLI.setUnavailable(LibFunc___kmpc_free_shared);
750     TLI.setUnavailable(LibFunc_dunder_strndup);
751     TLI.setUnavailable(LibFunc_bcmp);
752     TLI.setUnavailable(LibFunc_bcopy);
753     TLI.setUnavailable(LibFunc_bzero);
754     TLI.setUnavailable(LibFunc_cabs);
755     TLI.setUnavailable(LibFunc_cabsf);
756     TLI.setUnavailable(LibFunc_cabsl);
757     TLI.setUnavailable(LibFunc_ffs);
758     TLI.setUnavailable(LibFunc_flockfile);
759     TLI.setUnavailable(LibFunc_fseeko);
760     TLI.setUnavailable(LibFunc_ftello);
761     TLI.setUnavailable(LibFunc_ftrylockfile);
762     TLI.setUnavailable(LibFunc_funlockfile);
763     TLI.setUnavailable(LibFunc_htonl);
764     TLI.setUnavailable(LibFunc_htons);
765     TLI.setUnavailable(LibFunc_isascii);
766     TLI.setUnavailable(LibFunc_memccpy);
767     TLI.setUnavailable(LibFunc_mempcpy);
768     TLI.setUnavailable(LibFunc_memrchr);
769     TLI.setUnavailable(LibFunc_ntohl);
770     TLI.setUnavailable(LibFunc_ntohs);
771     TLI.setUnavailable(LibFunc_reallocf);
772     TLI.setUnavailable(LibFunc_roundeven);
773     TLI.setUnavailable(LibFunc_roundevenf);
774     TLI.setUnavailable(LibFunc_roundevenl);
775     TLI.setUnavailable(LibFunc_stpcpy);
776     TLI.setUnavailable(LibFunc_stpncpy);
777     TLI.setUnavailable(LibFunc_strlcat);
778     TLI.setUnavailable(LibFunc_strlcpy);
779     TLI.setUnavailable(LibFunc_strndup);
780     TLI.setUnavailable(LibFunc_strnlen);
781     TLI.setUnavailable(LibFunc_toascii);
782   }
783 
784   // As currently implemented in clang, NVPTX code has no standard library to
785   // speak of.  Headers provide a standard-ish library implementation, but many
786   // of the signatures are wrong -- for example, many libm functions are not
787   // extern "C".
788   //
789   // libdevice, an IR library provided by nvidia, is linked in by the front-end,
790   // but only used functions are provided to llvm.  Moreover, most of the
791   // functions in libdevice don't map precisely to standard library functions.
792   //
793   // FIXME: Having no standard library prevents e.g. many fastmath
794   // optimizations, so this situation should be fixed.
795   if (T.isNVPTX()) {
796     TLI.disableAllFunctions();
797     TLI.setAvailable(LibFunc_nvvm_reflect);
798     TLI.setAvailable(llvm::LibFunc_malloc);
799     TLI.setAvailable(llvm::LibFunc_free);
800 
801     // TODO: We could enable the following two according to [0] but we haven't
802     //       done an evaluation wrt. the performance implications.
803     // [0]
804     // https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#dynamic-global-memory-allocation-and-operations
805     //
806     //    TLI.setAvailable(llvm::LibFunc_memcpy);
807     //    TLI.setAvailable(llvm::LibFunc_memset);
808 
809     TLI.setAvailable(llvm::LibFunc___kmpc_alloc_shared);
810     TLI.setAvailable(llvm::LibFunc___kmpc_free_shared);
811   } else {
812     TLI.setUnavailable(LibFunc_nvvm_reflect);
813   }
814 
815   // These vec_malloc/free routines are only available on AIX.
816   if (!T.isOSAIX()) {
817     TLI.setUnavailable(LibFunc_vec_calloc);
818     TLI.setUnavailable(LibFunc_vec_malloc);
819     TLI.setUnavailable(LibFunc_vec_realloc);
820     TLI.setUnavailable(LibFunc_vec_free);
821   }
822 
823   TLI.addVectorizableFunctionsFromVecLib(ClVectorLibrary);
824 }
825 
TargetLibraryInfoImpl()826 TargetLibraryInfoImpl::TargetLibraryInfoImpl() {
827   // Default to everything being available.
828   memset(AvailableArray, -1, sizeof(AvailableArray));
829 
830   initialize(*this, Triple(), StandardNames);
831 }
832 
TargetLibraryInfoImpl(const Triple & T)833 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) {
834   // Default to everything being available.
835   memset(AvailableArray, -1, sizeof(AvailableArray));
836 
837   initialize(*this, T, StandardNames);
838 }
839 
TargetLibraryInfoImpl(const TargetLibraryInfoImpl & TLI)840 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI)
841     : CustomNames(TLI.CustomNames), ShouldExtI32Param(TLI.ShouldExtI32Param),
842       ShouldExtI32Return(TLI.ShouldExtI32Return),
843       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param),
844       SizeOfInt(TLI.SizeOfInt) {
845   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
846   VectorDescs = TLI.VectorDescs;
847   ScalarDescs = TLI.ScalarDescs;
848 }
849 
TargetLibraryInfoImpl(TargetLibraryInfoImpl && TLI)850 TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI)
851     : CustomNames(std::move(TLI.CustomNames)),
852       ShouldExtI32Param(TLI.ShouldExtI32Param),
853       ShouldExtI32Return(TLI.ShouldExtI32Return),
854       ShouldSignExtI32Param(TLI.ShouldSignExtI32Param),
855       SizeOfInt(TLI.SizeOfInt) {
856   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
857             AvailableArray);
858   VectorDescs = TLI.VectorDescs;
859   ScalarDescs = TLI.ScalarDescs;
860 }
861 
operator =(const TargetLibraryInfoImpl & TLI)862 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) {
863   CustomNames = TLI.CustomNames;
864   ShouldExtI32Param = TLI.ShouldExtI32Param;
865   ShouldExtI32Return = TLI.ShouldExtI32Return;
866   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
867   SizeOfInt = TLI.SizeOfInt;
868   memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
869   return *this;
870 }
871 
operator =(TargetLibraryInfoImpl && TLI)872 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) {
873   CustomNames = std::move(TLI.CustomNames);
874   ShouldExtI32Param = TLI.ShouldExtI32Param;
875   ShouldExtI32Return = TLI.ShouldExtI32Return;
876   ShouldSignExtI32Param = TLI.ShouldSignExtI32Param;
877   SizeOfInt = TLI.SizeOfInt;
878   std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
879             AvailableArray);
880   return *this;
881 }
882 
sanitizeFunctionName(StringRef funcName)883 static StringRef sanitizeFunctionName(StringRef funcName) {
884   // Filter out empty names and names containing null bytes, those can't be in
885   // our table.
886   if (funcName.empty() || funcName.find('\0') != StringRef::npos)
887     return StringRef();
888 
889   // Check for \01 prefix that is used to mangle __asm declarations and
890   // strip it if present.
891   return GlobalValue::dropLLVMManglingEscape(funcName);
892 }
893 
getLibFunc(StringRef funcName,LibFunc & F) const894 bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName, LibFunc &F) const {
895   funcName = sanitizeFunctionName(funcName);
896   if (funcName.empty())
897     return false;
898 
899   const auto *Start = std::begin(StandardNames);
900   const auto *End = std::end(StandardNames);
901   const auto *I = std::lower_bound(Start, End, funcName);
902   if (I != End && *I == funcName) {
903     F = (LibFunc)(I - Start);
904     return true;
905   }
906   return false;
907 }
908 
isValidProtoForLibFunc(const FunctionType & FTy,LibFunc F,const Module & M) const909 bool TargetLibraryInfoImpl::isValidProtoForLibFunc(const FunctionType &FTy,
910                                                    LibFunc F,
911                                                    const Module &M) const {
912   // FIXME: There is really no guarantee that sizeof(size_t) is equal to
913   // sizeof(int*) for every target. So the assumption used here to derive the
914   // SizeTBits based on the size of an integer pointer in address space zero
915   // isn't always valid.
916   unsigned SizeTBits = M.getDataLayout().getPointerSizeInBits(/*AddrSpace=*/0);
917   unsigned NumParams = FTy.getNumParams();
918 
919   switch (F) {
920   case LibFunc_execl:
921   case LibFunc_execlp:
922   case LibFunc_execle:
923     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
924             FTy.getParamType(1)->isPointerTy() &&
925             FTy.getReturnType()->isIntegerTy(32));
926   case LibFunc_execv:
927   case LibFunc_execvp:
928     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
929             FTy.getParamType(1)->isPointerTy() &&
930             FTy.getReturnType()->isIntegerTy(32));
931   case LibFunc_execvP:
932   case LibFunc_execvpe:
933   case LibFunc_execve:
934     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
935             FTy.getParamType(1)->isPointerTy() &&
936             FTy.getParamType(2)->isPointerTy() &&
937             FTy.getReturnType()->isIntegerTy(32));
938   case LibFunc_strlen_chk:
939     --NumParams;
940     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
941       return false;
942     LLVM_FALLTHROUGH;
943   case LibFunc_strlen:
944     return NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
945            FTy.getReturnType()->isIntegerTy(SizeTBits);
946 
947   case LibFunc_strchr:
948   case LibFunc_strrchr:
949     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
950             FTy.getParamType(0) == FTy.getReturnType() &&
951             FTy.getParamType(1)->isIntegerTy());
952 
953   case LibFunc_strtol:
954   case LibFunc_strtod:
955   case LibFunc_strtof:
956   case LibFunc_strtoul:
957   case LibFunc_strtoll:
958   case LibFunc_strtold:
959   case LibFunc_strtoull:
960     return ((NumParams == 2 || NumParams == 3) &&
961             FTy.getParamType(0)->isPointerTy() &&
962             FTy.getParamType(1)->isPointerTy());
963   case LibFunc_strcat_chk:
964     --NumParams;
965     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
966       return false;
967     LLVM_FALLTHROUGH;
968   case LibFunc_strcat:
969     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
970             FTy.getParamType(0) == FTy.getReturnType() &&
971             FTy.getParamType(1) == FTy.getReturnType());
972 
973   case LibFunc_strncat_chk:
974     --NumParams;
975     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
976       return false;
977     LLVM_FALLTHROUGH;
978   case LibFunc_strncat:
979     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
980             FTy.getParamType(0) == FTy.getReturnType() &&
981             FTy.getParamType(1) == FTy.getReturnType() &&
982             FTy.getParamType(2)->isIntegerTy(SizeTBits));
983 
984   case LibFunc_strcpy_chk:
985   case LibFunc_stpcpy_chk:
986     --NumParams;
987     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
988       return false;
989     LLVM_FALLTHROUGH;
990   case LibFunc_strcpy:
991   case LibFunc_stpcpy:
992     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(0) &&
993             FTy.getParamType(0) == FTy.getParamType(1) &&
994             FTy.getParamType(0)->isPointerTy());
995 
996   case LibFunc_strlcat_chk:
997   case LibFunc_strlcpy_chk:
998     --NumParams;
999     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1000       return false;
1001     LLVM_FALLTHROUGH;
1002   case LibFunc_strlcat:
1003   case LibFunc_strlcpy:
1004     return NumParams == 3 && FTy.getReturnType()->isIntegerTy(SizeTBits) &&
1005            FTy.getParamType(0)->isPointerTy() &&
1006            FTy.getParamType(1)->isPointerTy() &&
1007            FTy.getParamType(2)->isIntegerTy(SizeTBits);
1008 
1009   case LibFunc_strncpy_chk:
1010   case LibFunc_stpncpy_chk:
1011     --NumParams;
1012     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1013       return false;
1014     LLVM_FALLTHROUGH;
1015   case LibFunc_strncpy:
1016   case LibFunc_stpncpy:
1017     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
1018             FTy.getParamType(0) == FTy.getParamType(1) &&
1019             FTy.getParamType(0)->isPointerTy() &&
1020             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1021 
1022   case LibFunc_strxfrm:
1023     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1024             FTy.getParamType(1)->isPointerTy());
1025 
1026   case LibFunc_strcmp:
1027     return (NumParams == 2 && FTy.getReturnType()->isIntegerTy(32) &&
1028             FTy.getParamType(0)->isPointerTy() &&
1029             FTy.getParamType(0) == FTy.getParamType(1));
1030 
1031   case LibFunc_strncmp:
1032     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1033             FTy.getParamType(0)->isPointerTy() &&
1034             FTy.getParamType(0) == FTy.getParamType(1) &&
1035             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1036 
1037   case LibFunc_strspn:
1038   case LibFunc_strcspn:
1039     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1040             FTy.getParamType(0) == FTy.getParamType(1) &&
1041             FTy.getReturnType()->isIntegerTy());
1042 
1043   case LibFunc_strcoll:
1044   case LibFunc_strcasecmp:
1045   case LibFunc_strncasecmp:
1046     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1047             FTy.getParamType(1)->isPointerTy());
1048 
1049   case LibFunc_strstr:
1050     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1051             FTy.getParamType(0)->isPointerTy() &&
1052             FTy.getParamType(1)->isPointerTy());
1053 
1054   case LibFunc_strpbrk:
1055     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1056             FTy.getReturnType() == FTy.getParamType(0) &&
1057             FTy.getParamType(0) == FTy.getParamType(1));
1058 
1059   case LibFunc_strtok:
1060   case LibFunc_strtok_r:
1061     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
1062   case LibFunc_scanf:
1063   case LibFunc_setbuf:
1064   case LibFunc_setvbuf:
1065     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1066   case LibFunc_strdup:
1067   case LibFunc_strndup:
1068     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
1069             FTy.getParamType(0)->isPointerTy());
1070   case LibFunc_sscanf:
1071   case LibFunc_stat:
1072   case LibFunc_statvfs:
1073   case LibFunc_siprintf:
1074   case LibFunc_small_sprintf:
1075   case LibFunc_sprintf:
1076     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1077             FTy.getParamType(1)->isPointerTy() &&
1078             FTy.getReturnType()->isIntegerTy(32));
1079 
1080   case LibFunc_sprintf_chk:
1081     return NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1082            FTy.getParamType(1)->isIntegerTy(32) &&
1083            FTy.getParamType(2)->isIntegerTy(SizeTBits) &&
1084            FTy.getParamType(3)->isPointerTy() &&
1085            FTy.getReturnType()->isIntegerTy(32);
1086 
1087   case LibFunc_snprintf:
1088     return NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1089            FTy.getParamType(1)->isIntegerTy(SizeTBits) &&
1090            FTy.getParamType(2)->isPointerTy() &&
1091            FTy.getReturnType()->isIntegerTy(32);
1092 
1093   case LibFunc_snprintf_chk:
1094     return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
1095            FTy.getParamType(1)->isIntegerTy(SizeTBits) &&
1096            FTy.getParamType(2)->isIntegerTy(32) &&
1097            FTy.getParamType(3)->isIntegerTy(SizeTBits) &&
1098            FTy.getParamType(4)->isPointerTy() &&
1099            FTy.getReturnType()->isIntegerTy(32);
1100 
1101   case LibFunc_setitimer:
1102     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1103             FTy.getParamType(2)->isPointerTy());
1104   case LibFunc_system:
1105     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1106   case LibFunc___kmpc_alloc_shared:
1107   case LibFunc_malloc:
1108   case LibFunc_vec_malloc:
1109     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
1110   case LibFunc_memcmp:
1111     return NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1112            FTy.getParamType(0)->isPointerTy() &&
1113            FTy.getParamType(1)->isPointerTy() &&
1114            FTy.getParamType(2)->isIntegerTy(SizeTBits);
1115 
1116   case LibFunc_memchr:
1117   case LibFunc_memrchr:
1118     return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
1119             FTy.getReturnType() == FTy.getParamType(0) &&
1120             FTy.getParamType(1)->isIntegerTy(32) &&
1121             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1122   case LibFunc_modf:
1123   case LibFunc_modff:
1124   case LibFunc_modfl:
1125     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
1126 
1127   case LibFunc_memcpy_chk:
1128   case LibFunc_mempcpy_chk:
1129   case LibFunc_memmove_chk:
1130     --NumParams;
1131     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1132       return false;
1133     LLVM_FALLTHROUGH;
1134   case LibFunc_memcpy:
1135   case LibFunc_mempcpy:
1136   case LibFunc_memmove:
1137     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
1138             FTy.getParamType(0)->isPointerTy() &&
1139             FTy.getParamType(1)->isPointerTy() &&
1140             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1141 
1142   case LibFunc_memset_chk:
1143     --NumParams;
1144     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1145       return false;
1146     LLVM_FALLTHROUGH;
1147   case LibFunc_memset:
1148     return (NumParams == 3 && FTy.getReturnType() == FTy.getParamType(0) &&
1149             FTy.getParamType(0)->isPointerTy() &&
1150             FTy.getParamType(1)->isIntegerTy() &&
1151             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1152 
1153   case LibFunc_memccpy_chk:
1154       --NumParams;
1155     if (!FTy.getParamType(NumParams)->isIntegerTy(SizeTBits))
1156       return false;
1157     LLVM_FALLTHROUGH;
1158   case LibFunc_memccpy:
1159     return (NumParams >= 2 && FTy.getParamType(1)->isPointerTy());
1160   case LibFunc_memalign:
1161     return (FTy.getReturnType()->isPointerTy());
1162   case LibFunc_realloc:
1163   case LibFunc_reallocf:
1164   case LibFunc_vec_realloc:
1165     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1166             FTy.getParamType(0) == FTy.getReturnType() &&
1167             FTy.getParamType(1)->isIntegerTy(SizeTBits));
1168   case LibFunc_read:
1169     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1170   case LibFunc_rewind:
1171   case LibFunc_rmdir:
1172   case LibFunc_remove:
1173   case LibFunc_realpath:
1174     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1175   case LibFunc_rename:
1176     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1177             FTy.getParamType(1)->isPointerTy());
1178   case LibFunc_readlink:
1179     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1180             FTy.getParamType(1)->isPointerTy());
1181   case LibFunc_write:
1182     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1183   case LibFunc_aligned_alloc:
1184     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
1185   case LibFunc_bcopy:
1186   case LibFunc_bcmp:
1187     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1188             FTy.getParamType(1)->isPointerTy());
1189   case LibFunc_bzero:
1190     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1191   case LibFunc_calloc:
1192   case LibFunc_vec_calloc:
1193     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1194             FTy.getParamType(0) == FTy.getParamType(1));
1195 
1196   case LibFunc_atof:
1197   case LibFunc_atoi:
1198   case LibFunc_atol:
1199   case LibFunc_atoll:
1200   case LibFunc_ferror:
1201   case LibFunc_getenv:
1202   case LibFunc_getpwnam:
1203   case LibFunc_iprintf:
1204   case LibFunc_small_printf:
1205   case LibFunc_pclose:
1206   case LibFunc_perror:
1207   case LibFunc_printf:
1208   case LibFunc_puts:
1209   case LibFunc_uname:
1210   case LibFunc_under_IO_getc:
1211   case LibFunc_unlink:
1212   case LibFunc_unsetenv:
1213     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1214 
1215   case LibFunc_access:
1216   case LibFunc_chmod:
1217   case LibFunc_chown:
1218   case LibFunc_clearerr:
1219   case LibFunc_closedir:
1220   case LibFunc_ctermid:
1221   case LibFunc_fclose:
1222   case LibFunc_feof:
1223   case LibFunc_fflush:
1224   case LibFunc_fgetc:
1225   case LibFunc_fgetc_unlocked:
1226   case LibFunc_fileno:
1227   case LibFunc_flockfile:
1228   case LibFunc_free:
1229   case LibFunc_fseek:
1230   case LibFunc_fseeko64:
1231   case LibFunc_fseeko:
1232   case LibFunc_fsetpos:
1233   case LibFunc_ftell:
1234   case LibFunc_ftello64:
1235   case LibFunc_ftello:
1236   case LibFunc_ftrylockfile:
1237   case LibFunc_funlockfile:
1238   case LibFunc_getc:
1239   case LibFunc_getc_unlocked:
1240   case LibFunc_getlogin_r:
1241   case LibFunc_mkdir:
1242   case LibFunc_mktime:
1243   case LibFunc_times:
1244   case LibFunc_vec_free:
1245     return (NumParams != 0 && FTy.getParamType(0)->isPointerTy());
1246   case LibFunc___kmpc_free_shared:
1247     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1248             FTy.getParamType(1)->isIntegerTy(SizeTBits));
1249 
1250   case LibFunc_fopen:
1251     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1252             FTy.getParamType(0)->isPointerTy() &&
1253             FTy.getParamType(1)->isPointerTy());
1254   case LibFunc_fork:
1255     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy(32));
1256   case LibFunc_fdopen:
1257     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1258             FTy.getParamType(1)->isPointerTy());
1259   case LibFunc_fputc:
1260   case LibFunc_fputc_unlocked:
1261   case LibFunc_fstat:
1262   case LibFunc_frexp:
1263   case LibFunc_frexpf:
1264   case LibFunc_frexpl:
1265   case LibFunc_fstatvfs:
1266     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1267   case LibFunc_fgets:
1268   case LibFunc_fgets_unlocked:
1269     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1270             FTy.getParamType(2)->isPointerTy());
1271   case LibFunc_fread:
1272   case LibFunc_fread_unlocked:
1273     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1274             FTy.getParamType(3)->isPointerTy());
1275   case LibFunc_fwrite:
1276   case LibFunc_fwrite_unlocked:
1277     return (NumParams == 4 && FTy.getReturnType()->isIntegerTy() &&
1278             FTy.getParamType(0)->isPointerTy() &&
1279             FTy.getParamType(1)->isIntegerTy() &&
1280             FTy.getParamType(2)->isIntegerTy() &&
1281             FTy.getParamType(3)->isPointerTy());
1282   case LibFunc_fputs:
1283   case LibFunc_fputs_unlocked:
1284     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1285             FTy.getParamType(1)->isPointerTy());
1286   case LibFunc_fscanf:
1287   case LibFunc_fiprintf:
1288   case LibFunc_small_fprintf:
1289   case LibFunc_fprintf:
1290     return (NumParams >= 2 && FTy.getReturnType()->isIntegerTy() &&
1291             FTy.getParamType(0)->isPointerTy() &&
1292             FTy.getParamType(1)->isPointerTy());
1293   case LibFunc_fgetpos:
1294     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1295             FTy.getParamType(1)->isPointerTy());
1296   case LibFunc_getchar:
1297   case LibFunc_getchar_unlocked:
1298     return (NumParams == 0 && FTy.getReturnType()->isIntegerTy());
1299   case LibFunc_gets:
1300     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1301   case LibFunc_getitimer:
1302     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1303   case LibFunc_ungetc:
1304     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1305   case LibFunc_utime:
1306   case LibFunc_utimes:
1307     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1308             FTy.getParamType(1)->isPointerTy());
1309   case LibFunc_putc:
1310   case LibFunc_putc_unlocked:
1311     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1312   case LibFunc_pread:
1313   case LibFunc_pwrite:
1314     return (NumParams == 4 && FTy.getParamType(1)->isPointerTy());
1315   case LibFunc_popen:
1316     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1317             FTy.getParamType(0)->isPointerTy() &&
1318             FTy.getParamType(1)->isPointerTy());
1319   case LibFunc_vscanf:
1320     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1321   case LibFunc_vsscanf:
1322     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1323             FTy.getParamType(2)->isPointerTy());
1324   case LibFunc_vfscanf:
1325     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy() &&
1326             FTy.getParamType(2)->isPointerTy());
1327   case LibFunc_valloc:
1328     return (FTy.getReturnType()->isPointerTy());
1329   case LibFunc_vprintf:
1330     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1331   case LibFunc_vfprintf:
1332   case LibFunc_vsprintf:
1333     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
1334             FTy.getParamType(1)->isPointerTy());
1335   case LibFunc_vsprintf_chk:
1336     return NumParams == 5 && FTy.getParamType(0)->isPointerTy() &&
1337            FTy.getParamType(1)->isIntegerTy(32) &&
1338            FTy.getParamType(2)->isIntegerTy(SizeTBits) && FTy.getParamType(3)->isPointerTy();
1339   case LibFunc_vsnprintf:
1340     return (NumParams == 4 && FTy.getParamType(0)->isPointerTy() &&
1341             FTy.getParamType(2)->isPointerTy());
1342   case LibFunc_vsnprintf_chk:
1343     return NumParams == 6 && FTy.getParamType(0)->isPointerTy() &&
1344            FTy.getParamType(2)->isIntegerTy(32) &&
1345            FTy.getParamType(3)->isIntegerTy(SizeTBits) && FTy.getParamType(4)->isPointerTy();
1346   case LibFunc_open:
1347     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1348   case LibFunc_opendir:
1349     return (NumParams == 1 && FTy.getReturnType()->isPointerTy() &&
1350             FTy.getParamType(0)->isPointerTy());
1351   case LibFunc_tmpfile:
1352     return (FTy.getReturnType()->isPointerTy());
1353   case LibFunc_htonl:
1354   case LibFunc_ntohl:
1355     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1356             FTy.getReturnType() == FTy.getParamType(0));
1357   case LibFunc_htons:
1358   case LibFunc_ntohs:
1359     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(16) &&
1360             FTy.getReturnType() == FTy.getParamType(0));
1361   case LibFunc_lstat:
1362     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1363             FTy.getParamType(1)->isPointerTy());
1364   case LibFunc_lchown:
1365     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1366   case LibFunc_qsort:
1367     return (NumParams == 4 && FTy.getParamType(3)->isPointerTy());
1368   case LibFunc_dunder_strdup:
1369   case LibFunc_dunder_strndup:
1370     return (NumParams >= 1 && FTy.getReturnType()->isPointerTy() &&
1371             FTy.getParamType(0)->isPointerTy());
1372   case LibFunc_dunder_strtok_r:
1373     return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
1374   case LibFunc_under_IO_putc:
1375     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1376   case LibFunc_dunder_isoc99_scanf:
1377     return (NumParams >= 1 && FTy.getParamType(0)->isPointerTy());
1378   case LibFunc_stat64:
1379   case LibFunc_lstat64:
1380   case LibFunc_statvfs64:
1381     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1382             FTy.getParamType(1)->isPointerTy());
1383   case LibFunc_dunder_isoc99_sscanf:
1384     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
1385             FTy.getParamType(1)->isPointerTy());
1386   case LibFunc_fopen64:
1387     return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
1388             FTy.getParamType(0)->isPointerTy() &&
1389             FTy.getParamType(1)->isPointerTy());
1390   case LibFunc_tmpfile64:
1391     return (FTy.getReturnType()->isPointerTy());
1392   case LibFunc_fstat64:
1393   case LibFunc_fstatvfs64:
1394     return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
1395   case LibFunc_open64:
1396     return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy());
1397   case LibFunc_gettimeofday:
1398     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
1399             FTy.getParamType(1)->isPointerTy());
1400 
1401   // new(unsigned int);
1402   case LibFunc_Znwj:
1403   // new(unsigned long);
1404   case LibFunc_Znwm:
1405   // new[](unsigned int);
1406   case LibFunc_Znaj:
1407   // new[](unsigned long);
1408   case LibFunc_Znam:
1409   // new(unsigned int);
1410   case LibFunc_msvc_new_int:
1411   // new(unsigned long long);
1412   case LibFunc_msvc_new_longlong:
1413   // new[](unsigned int);
1414   case LibFunc_msvc_new_array_int:
1415   // new[](unsigned long long);
1416   case LibFunc_msvc_new_array_longlong:
1417     return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
1418 
1419   // new(unsigned int, nothrow);
1420   case LibFunc_ZnwjRKSt9nothrow_t:
1421   // new(unsigned long, nothrow);
1422   case LibFunc_ZnwmRKSt9nothrow_t:
1423   // new[](unsigned int, nothrow);
1424   case LibFunc_ZnajRKSt9nothrow_t:
1425   // new[](unsigned long, nothrow);
1426   case LibFunc_ZnamRKSt9nothrow_t:
1427   // new(unsigned int, nothrow);
1428   case LibFunc_msvc_new_int_nothrow:
1429   // new(unsigned long long, nothrow);
1430   case LibFunc_msvc_new_longlong_nothrow:
1431   // new[](unsigned int, nothrow);
1432   case LibFunc_msvc_new_array_int_nothrow:
1433   // new[](unsigned long long, nothrow);
1434   case LibFunc_msvc_new_array_longlong_nothrow:
1435   // new(unsigned int, align_val_t)
1436   case LibFunc_ZnwjSt11align_val_t:
1437   // new(unsigned long, align_val_t)
1438   case LibFunc_ZnwmSt11align_val_t:
1439   // new[](unsigned int, align_val_t)
1440   case LibFunc_ZnajSt11align_val_t:
1441   // new[](unsigned long, align_val_t)
1442   case LibFunc_ZnamSt11align_val_t:
1443     return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
1444 
1445   // new(unsigned int, align_val_t, nothrow)
1446   case LibFunc_ZnwjSt11align_val_tRKSt9nothrow_t:
1447   // new(unsigned long, align_val_t, nothrow)
1448   case LibFunc_ZnwmSt11align_val_tRKSt9nothrow_t:
1449   // new[](unsigned int, align_val_t, nothrow)
1450   case LibFunc_ZnajSt11align_val_tRKSt9nothrow_t:
1451   // new[](unsigned long, align_val_t, nothrow)
1452   case LibFunc_ZnamSt11align_val_tRKSt9nothrow_t:
1453     return (NumParams == 3 && FTy.getReturnType()->isPointerTy());
1454 
1455   // void operator delete[](void*);
1456   case LibFunc_ZdaPv:
1457   // void operator delete(void*);
1458   case LibFunc_ZdlPv:
1459   // void operator delete[](void*);
1460   case LibFunc_msvc_delete_array_ptr32:
1461   // void operator delete[](void*);
1462   case LibFunc_msvc_delete_array_ptr64:
1463   // void operator delete(void*);
1464   case LibFunc_msvc_delete_ptr32:
1465   // void operator delete(void*);
1466   case LibFunc_msvc_delete_ptr64:
1467     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1468 
1469   // void operator delete[](void*, nothrow);
1470   case LibFunc_ZdaPvRKSt9nothrow_t:
1471   // void operator delete[](void*, unsigned int);
1472   case LibFunc_ZdaPvj:
1473   // void operator delete[](void*, unsigned long);
1474   case LibFunc_ZdaPvm:
1475   // void operator delete(void*, nothrow);
1476   case LibFunc_ZdlPvRKSt9nothrow_t:
1477   // void operator delete(void*, unsigned int);
1478   case LibFunc_ZdlPvj:
1479   // void operator delete(void*, unsigned long);
1480   case LibFunc_ZdlPvm:
1481   // void operator delete(void*, align_val_t)
1482   case LibFunc_ZdlPvSt11align_val_t:
1483   // void operator delete[](void*, align_val_t)
1484   case LibFunc_ZdaPvSt11align_val_t:
1485   // void operator delete[](void*, unsigned int);
1486   case LibFunc_msvc_delete_array_ptr32_int:
1487   // void operator delete[](void*, nothrow);
1488   case LibFunc_msvc_delete_array_ptr32_nothrow:
1489   // void operator delete[](void*, unsigned long long);
1490   case LibFunc_msvc_delete_array_ptr64_longlong:
1491   // void operator delete[](void*, nothrow);
1492   case LibFunc_msvc_delete_array_ptr64_nothrow:
1493   // void operator delete(void*, unsigned int);
1494   case LibFunc_msvc_delete_ptr32_int:
1495   // void operator delete(void*, nothrow);
1496   case LibFunc_msvc_delete_ptr32_nothrow:
1497   // void operator delete(void*, unsigned long long);
1498   case LibFunc_msvc_delete_ptr64_longlong:
1499   // void operator delete(void*, nothrow);
1500   case LibFunc_msvc_delete_ptr64_nothrow:
1501     return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
1502 
1503   // void operator delete(void*, align_val_t, nothrow)
1504   case LibFunc_ZdlPvSt11align_val_tRKSt9nothrow_t:
1505   // void operator delete[](void*, align_val_t, nothrow)
1506   case LibFunc_ZdaPvSt11align_val_tRKSt9nothrow_t:
1507   // void operator delete(void*, unsigned int, align_val_t)
1508   case LibFunc_ZdlPvjSt11align_val_t:
1509   // void operator delete(void*, unsigned long, align_val_t)
1510   case LibFunc_ZdlPvmSt11align_val_t:
1511   // void operator delete[](void*, unsigned int, align_val_t);
1512   case LibFunc_ZdaPvjSt11align_val_t:
1513   // void operator delete[](void*, unsigned long, align_val_t);
1514   case LibFunc_ZdaPvmSt11align_val_t:
1515     return (NumParams == 3 && FTy.getParamType(0)->isPointerTy());
1516 
1517   // void __atomic_load(size_t, void *, void *, int)
1518   case LibFunc_atomic_load:
1519   // void __atomic_store(size_t, void *, void *, int)
1520   case LibFunc_atomic_store:
1521     return (NumParams == 4 && FTy.getParamType(0)->isIntegerTy() &&
1522             FTy.getParamType(1)->isPointerTy() &&
1523             FTy.getParamType(2)->isPointerTy() &&
1524             FTy.getParamType(3)->isIntegerTy());
1525 
1526   case LibFunc_memset_pattern16:
1527     return (!FTy.isVarArg() && NumParams == 3 &&
1528             FTy.getParamType(0)->isPointerTy() &&
1529             FTy.getParamType(1)->isPointerTy() &&
1530             FTy.getParamType(2)->isIntegerTy());
1531 
1532   case LibFunc_cxa_guard_abort:
1533   case LibFunc_cxa_guard_acquire:
1534   case LibFunc_cxa_guard_release:
1535   case LibFunc_nvvm_reflect:
1536     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
1537 
1538   case LibFunc_sincospi_stret:
1539   case LibFunc_sincospif_stret:
1540     return (NumParams == 1 && FTy.getParamType(0)->isFloatingPointTy());
1541 
1542   case LibFunc_acos:
1543   case LibFunc_acos_finite:
1544   case LibFunc_acosf:
1545   case LibFunc_acosf_finite:
1546   case LibFunc_acosh:
1547   case LibFunc_acosh_finite:
1548   case LibFunc_acoshf:
1549   case LibFunc_acoshf_finite:
1550   case LibFunc_acoshl:
1551   case LibFunc_acoshl_finite:
1552   case LibFunc_acosl:
1553   case LibFunc_acosl_finite:
1554   case LibFunc_asin:
1555   case LibFunc_asin_finite:
1556   case LibFunc_asinf:
1557   case LibFunc_asinf_finite:
1558   case LibFunc_asinh:
1559   case LibFunc_asinhf:
1560   case LibFunc_asinhl:
1561   case LibFunc_asinl:
1562   case LibFunc_asinl_finite:
1563   case LibFunc_atan:
1564   case LibFunc_atanf:
1565   case LibFunc_atanh:
1566   case LibFunc_atanh_finite:
1567   case LibFunc_atanhf:
1568   case LibFunc_atanhf_finite:
1569   case LibFunc_atanhl:
1570   case LibFunc_atanhl_finite:
1571   case LibFunc_atanl:
1572   case LibFunc_cbrt:
1573   case LibFunc_cbrtf:
1574   case LibFunc_cbrtl:
1575   case LibFunc_ceil:
1576   case LibFunc_ceilf:
1577   case LibFunc_ceill:
1578   case LibFunc_cos:
1579   case LibFunc_cosf:
1580   case LibFunc_cosh:
1581   case LibFunc_cosh_finite:
1582   case LibFunc_coshf:
1583   case LibFunc_coshf_finite:
1584   case LibFunc_coshl:
1585   case LibFunc_coshl_finite:
1586   case LibFunc_cosl:
1587   case LibFunc_exp10:
1588   case LibFunc_exp10_finite:
1589   case LibFunc_exp10f:
1590   case LibFunc_exp10f_finite:
1591   case LibFunc_exp10l:
1592   case LibFunc_exp10l_finite:
1593   case LibFunc_exp2:
1594   case LibFunc_exp2_finite:
1595   case LibFunc_exp2f:
1596   case LibFunc_exp2f_finite:
1597   case LibFunc_exp2l:
1598   case LibFunc_exp2l_finite:
1599   case LibFunc_exp:
1600   case LibFunc_exp_finite:
1601   case LibFunc_expf:
1602   case LibFunc_expf_finite:
1603   case LibFunc_expl:
1604   case LibFunc_expl_finite:
1605   case LibFunc_expm1:
1606   case LibFunc_expm1f:
1607   case LibFunc_expm1l:
1608   case LibFunc_fabs:
1609   case LibFunc_fabsf:
1610   case LibFunc_fabsl:
1611   case LibFunc_floor:
1612   case LibFunc_floorf:
1613   case LibFunc_floorl:
1614   case LibFunc_log10:
1615   case LibFunc_log10_finite:
1616   case LibFunc_log10f:
1617   case LibFunc_log10f_finite:
1618   case LibFunc_log10l:
1619   case LibFunc_log10l_finite:
1620   case LibFunc_log1p:
1621   case LibFunc_log1pf:
1622   case LibFunc_log1pl:
1623   case LibFunc_log2:
1624   case LibFunc_log2_finite:
1625   case LibFunc_log2f:
1626   case LibFunc_log2f_finite:
1627   case LibFunc_log2l:
1628   case LibFunc_log2l_finite:
1629   case LibFunc_log:
1630   case LibFunc_log_finite:
1631   case LibFunc_logb:
1632   case LibFunc_logbf:
1633   case LibFunc_logbl:
1634   case LibFunc_logf:
1635   case LibFunc_logf_finite:
1636   case LibFunc_logl:
1637   case LibFunc_logl_finite:
1638   case LibFunc_nearbyint:
1639   case LibFunc_nearbyintf:
1640   case LibFunc_nearbyintl:
1641   case LibFunc_rint:
1642   case LibFunc_rintf:
1643   case LibFunc_rintl:
1644   case LibFunc_round:
1645   case LibFunc_roundf:
1646   case LibFunc_roundl:
1647   case LibFunc_roundeven:
1648   case LibFunc_roundevenf:
1649   case LibFunc_roundevenl:
1650   case LibFunc_sin:
1651   case LibFunc_sinf:
1652   case LibFunc_sinh:
1653   case LibFunc_sinh_finite:
1654   case LibFunc_sinhf:
1655   case LibFunc_sinhf_finite:
1656   case LibFunc_sinhl:
1657   case LibFunc_sinhl_finite:
1658   case LibFunc_sinl:
1659   case LibFunc_sqrt:
1660   case LibFunc_sqrt_finite:
1661   case LibFunc_sqrtf:
1662   case LibFunc_sqrtf_finite:
1663   case LibFunc_sqrtl:
1664   case LibFunc_sqrtl_finite:
1665   case LibFunc_tan:
1666   case LibFunc_tanf:
1667   case LibFunc_tanh:
1668   case LibFunc_tanhf:
1669   case LibFunc_tanhl:
1670   case LibFunc_tanl:
1671   case LibFunc_trunc:
1672   case LibFunc_truncf:
1673   case LibFunc_truncl:
1674     return (NumParams == 1 && FTy.getReturnType()->isFloatingPointTy() &&
1675             FTy.getReturnType() == FTy.getParamType(0));
1676 
1677   case LibFunc_atan2:
1678   case LibFunc_atan2_finite:
1679   case LibFunc_atan2f:
1680   case LibFunc_atan2f_finite:
1681   case LibFunc_atan2l:
1682   case LibFunc_atan2l_finite:
1683   case LibFunc_fmin:
1684   case LibFunc_fminf:
1685   case LibFunc_fminl:
1686   case LibFunc_fmax:
1687   case LibFunc_fmaxf:
1688   case LibFunc_fmaxl:
1689   case LibFunc_fmod:
1690   case LibFunc_fmodf:
1691   case LibFunc_fmodl:
1692   case LibFunc_remainder:
1693   case LibFunc_remainderf:
1694   case LibFunc_remainderl:
1695   case LibFunc_copysign:
1696   case LibFunc_copysignf:
1697   case LibFunc_copysignl:
1698   case LibFunc_pow:
1699   case LibFunc_pow_finite:
1700   case LibFunc_powf:
1701   case LibFunc_powf_finite:
1702   case LibFunc_powl:
1703   case LibFunc_powl_finite:
1704     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1705             FTy.getReturnType() == FTy.getParamType(0) &&
1706             FTy.getReturnType() == FTy.getParamType(1));
1707 
1708   case LibFunc_ldexp:
1709   case LibFunc_ldexpf:
1710   case LibFunc_ldexpl:
1711     return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
1712             FTy.getReturnType() == FTy.getParamType(0) &&
1713             FTy.getParamType(1)->isIntegerTy(getIntSize()));
1714 
1715   case LibFunc_ffs:
1716   case LibFunc_ffsl:
1717   case LibFunc_ffsll:
1718   case LibFunc_fls:
1719   case LibFunc_flsl:
1720   case LibFunc_flsll:
1721     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1722             FTy.getParamType(0)->isIntegerTy());
1723 
1724   case LibFunc_isdigit:
1725   case LibFunc_isascii:
1726   case LibFunc_toascii:
1727   case LibFunc_putchar:
1728   case LibFunc_putchar_unlocked:
1729     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
1730             FTy.getReturnType() == FTy.getParamType(0));
1731 
1732   case LibFunc_abs:
1733   case LibFunc_labs:
1734   case LibFunc_llabs:
1735     return (NumParams == 1 && FTy.getReturnType()->isIntegerTy() &&
1736             FTy.getReturnType() == FTy.getParamType(0));
1737 
1738   case LibFunc_cxa_atexit:
1739     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy() &&
1740             FTy.getParamType(0)->isPointerTy() &&
1741             FTy.getParamType(1)->isPointerTy() &&
1742             FTy.getParamType(2)->isPointerTy());
1743 
1744   case LibFunc_sinpi:
1745   case LibFunc_cospi:
1746     return (NumParams == 1 && FTy.getReturnType()->isDoubleTy() &&
1747             FTy.getReturnType() == FTy.getParamType(0));
1748 
1749   case LibFunc_sinpif:
1750   case LibFunc_cospif:
1751     return (NumParams == 1 && FTy.getReturnType()->isFloatTy() &&
1752             FTy.getReturnType() == FTy.getParamType(0));
1753 
1754   case LibFunc_strnlen:
1755     return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(1) &&
1756             FTy.getParamType(0)->isPointerTy() &&
1757             FTy.getParamType(1)->isIntegerTy(SizeTBits));
1758 
1759   case LibFunc_posix_memalign:
1760     return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
1761             FTy.getParamType(0)->isPointerTy() &&
1762             FTy.getParamType(1)->isIntegerTy(SizeTBits) &&
1763             FTy.getParamType(2)->isIntegerTy(SizeTBits));
1764 
1765   case LibFunc_wcslen:
1766     return (NumParams == 1 && FTy.getParamType(0)->isPointerTy() &&
1767             FTy.getReturnType()->isIntegerTy());
1768 
1769   case LibFunc_cabs:
1770   case LibFunc_cabsf:
1771   case LibFunc_cabsl: {
1772     Type* RetTy = FTy.getReturnType();
1773     if (!RetTy->isFloatingPointTy())
1774       return false;
1775 
1776     // NOTE: These prototypes are target specific and currently support
1777     // "complex" passed as an array or discrete real & imaginary parameters.
1778     // Add other calling conventions to enable libcall optimizations.
1779     if (NumParams == 1)
1780       return (FTy.getParamType(0)->isArrayTy() &&
1781               FTy.getParamType(0)->getArrayNumElements() == 2 &&
1782               FTy.getParamType(0)->getArrayElementType() == RetTy);
1783     else if (NumParams == 2)
1784       return (FTy.getParamType(0) == RetTy && FTy.getParamType(1) == RetTy);
1785     else
1786       return false;
1787   }
1788   case LibFunc::NumLibFuncs:
1789   case LibFunc::NotLibFunc:
1790     break;
1791   }
1792 
1793   llvm_unreachable("Invalid libfunc");
1794 }
1795 
getLibFunc(const Function & FDecl,LibFunc & F) const1796 bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl,
1797                                        LibFunc &F) const {
1798   // Intrinsics don't overlap w/libcalls; if our module has a large number of
1799   // intrinsics, this ends up being an interesting compile time win since we
1800   // avoid string normalization and comparison.
1801   if (FDecl.isIntrinsic()) return false;
1802 
1803   const Module *M = FDecl.getParent();
1804   assert(M && "Expecting FDecl to be connected to a Module.");
1805 
1806   return getLibFunc(FDecl.getName(), F) &&
1807          isValidProtoForLibFunc(*FDecl.getFunctionType(), F, *M);
1808 }
1809 
disableAllFunctions()1810 void TargetLibraryInfoImpl::disableAllFunctions() {
1811   memset(AvailableArray, 0, sizeof(AvailableArray));
1812 }
1813 
compareByScalarFnName(const VecDesc & LHS,const VecDesc & RHS)1814 static bool compareByScalarFnName(const VecDesc &LHS, const VecDesc &RHS) {
1815   return LHS.ScalarFnName < RHS.ScalarFnName;
1816 }
1817 
compareByVectorFnName(const VecDesc & LHS,const VecDesc & RHS)1818 static bool compareByVectorFnName(const VecDesc &LHS, const VecDesc &RHS) {
1819   return LHS.VectorFnName < RHS.VectorFnName;
1820 }
1821 
compareWithScalarFnName(const VecDesc & LHS,StringRef S)1822 static bool compareWithScalarFnName(const VecDesc &LHS, StringRef S) {
1823   return LHS.ScalarFnName < S;
1824 }
1825 
addVectorizableFunctions(ArrayRef<VecDesc> Fns)1826 void TargetLibraryInfoImpl::addVectorizableFunctions(ArrayRef<VecDesc> Fns) {
1827   llvm::append_range(VectorDescs, Fns);
1828   llvm::sort(VectorDescs, compareByScalarFnName);
1829 
1830   llvm::append_range(ScalarDescs, Fns);
1831   llvm::sort(ScalarDescs, compareByVectorFnName);
1832 }
1833 
addVectorizableFunctionsFromVecLib(enum VectorLibrary VecLib)1834 void TargetLibraryInfoImpl::addVectorizableFunctionsFromVecLib(
1835     enum VectorLibrary VecLib) {
1836   switch (VecLib) {
1837   case Accelerate: {
1838     const VecDesc VecFuncs[] = {
1839     #define TLI_DEFINE_ACCELERATE_VECFUNCS
1840     #include "llvm/Analysis/VecFuncs.def"
1841     };
1842     addVectorizableFunctions(VecFuncs);
1843     break;
1844   }
1845   case DarwinLibSystemM: {
1846     const VecDesc VecFuncs[] = {
1847     #define TLI_DEFINE_DARWIN_LIBSYSTEM_M_VECFUNCS
1848     #include "llvm/Analysis/VecFuncs.def"
1849     };
1850     addVectorizableFunctions(VecFuncs);
1851     break;
1852   }
1853   case LIBMVEC_X86: {
1854     const VecDesc VecFuncs[] = {
1855     #define TLI_DEFINE_LIBMVEC_X86_VECFUNCS
1856     #include "llvm/Analysis/VecFuncs.def"
1857     };
1858     addVectorizableFunctions(VecFuncs);
1859     break;
1860   }
1861   case MASSV: {
1862     const VecDesc VecFuncs[] = {
1863     #define TLI_DEFINE_MASSV_VECFUNCS
1864     #include "llvm/Analysis/VecFuncs.def"
1865     };
1866     addVectorizableFunctions(VecFuncs);
1867     break;
1868   }
1869   case SVML: {
1870     const VecDesc VecFuncs[] = {
1871     #define TLI_DEFINE_SVML_VECFUNCS
1872     #include "llvm/Analysis/VecFuncs.def"
1873     };
1874     addVectorizableFunctions(VecFuncs);
1875     break;
1876   }
1877   case NoLibrary:
1878     break;
1879   }
1880 }
1881 
isFunctionVectorizable(StringRef funcName) const1882 bool TargetLibraryInfoImpl::isFunctionVectorizable(StringRef funcName) const {
1883   funcName = sanitizeFunctionName(funcName);
1884   if (funcName.empty())
1885     return false;
1886 
1887   std::vector<VecDesc>::const_iterator I =
1888       llvm::lower_bound(VectorDescs, funcName, compareWithScalarFnName);
1889   return I != VectorDescs.end() && StringRef(I->ScalarFnName) == funcName;
1890 }
1891 
1892 StringRef
getVectorizedFunction(StringRef F,const ElementCount & VF) const1893 TargetLibraryInfoImpl::getVectorizedFunction(StringRef F,
1894                                              const ElementCount &VF) const {
1895   F = sanitizeFunctionName(F);
1896   if (F.empty())
1897     return F;
1898   std::vector<VecDesc>::const_iterator I =
1899       llvm::lower_bound(VectorDescs, F, compareWithScalarFnName);
1900   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == F) {
1901     if (I->VectorizationFactor == VF)
1902       return I->VectorFnName;
1903     ++I;
1904   }
1905   return StringRef();
1906 }
1907 
run(const Function & F,FunctionAnalysisManager &)1908 TargetLibraryInfo TargetLibraryAnalysis::run(const Function &F,
1909                                              FunctionAnalysisManager &) {
1910   if (!BaselineInfoImpl)
1911     BaselineInfoImpl =
1912         TargetLibraryInfoImpl(Triple(F.getParent()->getTargetTriple()));
1913   return TargetLibraryInfo(*BaselineInfoImpl, &F);
1914 }
1915 
getWCharSize(const Module & M) const1916 unsigned TargetLibraryInfoImpl::getWCharSize(const Module &M) const {
1917   if (auto *ShortWChar = cast_or_null<ConstantAsMetadata>(
1918       M.getModuleFlag("wchar_size")))
1919     return cast<ConstantInt>(ShortWChar->getValue())->getZExtValue();
1920   return 0;
1921 }
1922 
TargetLibraryInfoWrapperPass()1923 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass()
1924     : ImmutablePass(ID), TLA(TargetLibraryInfoImpl()) {
1925   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1926 }
1927 
TargetLibraryInfoWrapperPass(const Triple & T)1928 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T)
1929     : ImmutablePass(ID), TLA(TargetLibraryInfoImpl(T)) {
1930   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1931 }
1932 
TargetLibraryInfoWrapperPass(const TargetLibraryInfoImpl & TLIImpl)1933 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(
1934     const TargetLibraryInfoImpl &TLIImpl)
1935     : ImmutablePass(ID), TLA(TLIImpl) {
1936   initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
1937 }
1938 
1939 AnalysisKey TargetLibraryAnalysis::Key;
1940 
1941 // Register the basic pass.
1942 INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo",
1943                 "Target Library Information", false, true)
1944 char TargetLibraryInfoWrapperPass::ID = 0;
1945 
anchor()1946 void TargetLibraryInfoWrapperPass::anchor() {}
1947 
getWidestVF(StringRef ScalarF,ElementCount & FixedVF,ElementCount & ScalableVF) const1948 void TargetLibraryInfoImpl::getWidestVF(StringRef ScalarF,
1949                                         ElementCount &FixedVF,
1950                                         ElementCount &ScalableVF) const {
1951   ScalarF = sanitizeFunctionName(ScalarF);
1952   // Use '0' here because a type of the form <vscale x 1 x ElTy> is not the
1953   // same as a scalar.
1954   ScalableVF = ElementCount::getScalable(0);
1955   FixedVF = ElementCount::getFixed(1);
1956   if (ScalarF.empty())
1957     return;
1958 
1959   std::vector<VecDesc>::const_iterator I =
1960       llvm::lower_bound(VectorDescs, ScalarF, compareWithScalarFnName);
1961   while (I != VectorDescs.end() && StringRef(I->ScalarFnName) == ScalarF) {
1962     ElementCount *VF =
1963         I->VectorizationFactor.isScalable() ? &ScalableVF : &FixedVF;
1964     if (ElementCount::isKnownGT(I->VectorizationFactor, *VF))
1965       *VF = I->VectorizationFactor;
1966     ++I;
1967   }
1968 }
1969