1 //===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the TargetLibraryInfo class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Analysis/TargetLibraryInfo.h"
15 #include "llvm/ADT/Triple.h"
18 const char* TargetLibraryInfoImpl::StandardNames[LibFunc::NumLibFuncs] =
20 #define TLI_DEFINE_STRING
21 #include "llvm/Analysis/TargetLibraryInfo.def"
24 static bool hasSinCosPiStret(const Triple &T) {
25 // Only Darwin variants have _stret versions of combined trig functions.
29 // The ABI is rather complicated on x86, so don't do anything special there.
30 if (T.getArch() == Triple::x86)
33 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
36 if (T.isiOS() && T.isOSVersionLT(7, 0))
42 /// initialize - Initialize the set of available library functions based on the
43 /// specified target triple. This should be carefully written so that a missing
44 /// target triple gets a sane set of defaults.
45 static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
46 const char **StandardNames) {
48 // Verify that the StandardNames array is in alphabetical order.
49 for (unsigned F = 1; F < LibFunc::NumLibFuncs; ++F) {
50 if (strcmp(StandardNames[F-1], StandardNames[F]) >= 0)
51 llvm_unreachable("TargetLibraryInfoImpl function names must be sorted");
55 // There are no library implementations of mempcy and memset for AMD gpus and
56 // these can be difficult to lower in the backend.
57 if (T.getArch() == Triple::r600 ||
58 T.getArch() == Triple::amdgcn) {
59 TLI.setUnavailable(LibFunc::memcpy);
60 TLI.setUnavailable(LibFunc::memset);
61 TLI.setUnavailable(LibFunc::memset_pattern16);
65 // memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
67 if (T.isMacOSXVersionLT(10, 5))
68 TLI.setUnavailable(LibFunc::memset_pattern16);
69 } else if (T.isiOS()) {
70 if (T.isOSVersionLT(3, 0))
71 TLI.setUnavailable(LibFunc::memset_pattern16);
73 TLI.setUnavailable(LibFunc::memset_pattern16);
76 if (!hasSinCosPiStret(T)) {
77 TLI.setUnavailable(LibFunc::sinpi);
78 TLI.setUnavailable(LibFunc::sinpif);
79 TLI.setUnavailable(LibFunc::cospi);
80 TLI.setUnavailable(LibFunc::cospif);
81 TLI.setUnavailable(LibFunc::sincospi_stret);
82 TLI.setUnavailable(LibFunc::sincospif_stret);
85 if (T.isMacOSX() && T.getArch() == Triple::x86 &&
86 !T.isMacOSXVersionLT(10, 7)) {
87 // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
88 // we don't care about) have two versions; on recent OSX, the one we want
89 // has a $UNIX2003 suffix. The two implementations are identical except
90 // for the return value in some edge cases. However, we don't want to
91 // generate code that depends on the old symbols.
92 TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
93 TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
96 // iprintf and friends are only available on XCore and TCE.
97 if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
98 TLI.setUnavailable(LibFunc::iprintf);
99 TLI.setUnavailable(LibFunc::siprintf);
100 TLI.setUnavailable(LibFunc::fiprintf);
103 if (T.isOSWindows() && !T.isOSCygMing()) {
104 // Win32 does not support long double
105 TLI.setUnavailable(LibFunc::acosl);
106 TLI.setUnavailable(LibFunc::asinl);
107 TLI.setUnavailable(LibFunc::atanl);
108 TLI.setUnavailable(LibFunc::atan2l);
109 TLI.setUnavailable(LibFunc::ceill);
110 TLI.setUnavailable(LibFunc::copysignl);
111 TLI.setUnavailable(LibFunc::cosl);
112 TLI.setUnavailable(LibFunc::coshl);
113 TLI.setUnavailable(LibFunc::expl);
114 TLI.setUnavailable(LibFunc::fabsf); // Win32 and Win64 both lack fabsf
115 TLI.setUnavailable(LibFunc::fabsl);
116 TLI.setUnavailable(LibFunc::floorl);
117 TLI.setUnavailable(LibFunc::fmaxl);
118 TLI.setUnavailable(LibFunc::fminl);
119 TLI.setUnavailable(LibFunc::fmodl);
120 TLI.setUnavailable(LibFunc::frexpl);
121 TLI.setUnavailable(LibFunc::ldexpf);
122 TLI.setUnavailable(LibFunc::ldexpl);
123 TLI.setUnavailable(LibFunc::logl);
124 TLI.setUnavailable(LibFunc::modfl);
125 TLI.setUnavailable(LibFunc::powl);
126 TLI.setUnavailable(LibFunc::sinl);
127 TLI.setUnavailable(LibFunc::sinhl);
128 TLI.setUnavailable(LibFunc::sqrtl);
129 TLI.setUnavailable(LibFunc::tanl);
130 TLI.setUnavailable(LibFunc::tanhl);
132 // Win32 only has C89 math
133 TLI.setUnavailable(LibFunc::acosh);
134 TLI.setUnavailable(LibFunc::acoshf);
135 TLI.setUnavailable(LibFunc::acoshl);
136 TLI.setUnavailable(LibFunc::asinh);
137 TLI.setUnavailable(LibFunc::asinhf);
138 TLI.setUnavailable(LibFunc::asinhl);
139 TLI.setUnavailable(LibFunc::atanh);
140 TLI.setUnavailable(LibFunc::atanhf);
141 TLI.setUnavailable(LibFunc::atanhl);
142 TLI.setUnavailable(LibFunc::cbrt);
143 TLI.setUnavailable(LibFunc::cbrtf);
144 TLI.setUnavailable(LibFunc::cbrtl);
145 TLI.setUnavailable(LibFunc::exp2);
146 TLI.setUnavailable(LibFunc::exp2f);
147 TLI.setUnavailable(LibFunc::exp2l);
148 TLI.setUnavailable(LibFunc::expm1);
149 TLI.setUnavailable(LibFunc::expm1f);
150 TLI.setUnavailable(LibFunc::expm1l);
151 TLI.setUnavailable(LibFunc::log2);
152 TLI.setUnavailable(LibFunc::log2f);
153 TLI.setUnavailable(LibFunc::log2l);
154 TLI.setUnavailable(LibFunc::log1p);
155 TLI.setUnavailable(LibFunc::log1pf);
156 TLI.setUnavailable(LibFunc::log1pl);
157 TLI.setUnavailable(LibFunc::logb);
158 TLI.setUnavailable(LibFunc::logbf);
159 TLI.setUnavailable(LibFunc::logbl);
160 TLI.setUnavailable(LibFunc::nearbyint);
161 TLI.setUnavailable(LibFunc::nearbyintf);
162 TLI.setUnavailable(LibFunc::nearbyintl);
163 TLI.setUnavailable(LibFunc::rint);
164 TLI.setUnavailable(LibFunc::rintf);
165 TLI.setUnavailable(LibFunc::rintl);
166 TLI.setUnavailable(LibFunc::round);
167 TLI.setUnavailable(LibFunc::roundf);
168 TLI.setUnavailable(LibFunc::roundl);
169 TLI.setUnavailable(LibFunc::trunc);
170 TLI.setUnavailable(LibFunc::truncf);
171 TLI.setUnavailable(LibFunc::truncl);
173 // Win32 provides some C99 math with mangled names
174 TLI.setAvailableWithName(LibFunc::copysign, "_copysign");
176 if (T.getArch() == Triple::x86) {
177 // Win32 on x86 implements single-precision math functions as macros
178 TLI.setUnavailable(LibFunc::acosf);
179 TLI.setUnavailable(LibFunc::asinf);
180 TLI.setUnavailable(LibFunc::atanf);
181 TLI.setUnavailable(LibFunc::atan2f);
182 TLI.setUnavailable(LibFunc::ceilf);
183 TLI.setUnavailable(LibFunc::copysignf);
184 TLI.setUnavailable(LibFunc::cosf);
185 TLI.setUnavailable(LibFunc::coshf);
186 TLI.setUnavailable(LibFunc::expf);
187 TLI.setUnavailable(LibFunc::floorf);
188 TLI.setUnavailable(LibFunc::fminf);
189 TLI.setUnavailable(LibFunc::fmaxf);
190 TLI.setUnavailable(LibFunc::fmodf);
191 TLI.setUnavailable(LibFunc::logf);
192 TLI.setUnavailable(LibFunc::powf);
193 TLI.setUnavailable(LibFunc::sinf);
194 TLI.setUnavailable(LibFunc::sinhf);
195 TLI.setUnavailable(LibFunc::sqrtf);
196 TLI.setUnavailable(LibFunc::tanf);
197 TLI.setUnavailable(LibFunc::tanhf);
200 // Win32 does *not* provide provide these functions, but they are
201 // generally available on POSIX-compliant systems:
202 TLI.setUnavailable(LibFunc::access);
203 TLI.setUnavailable(LibFunc::bcmp);
204 TLI.setUnavailable(LibFunc::bcopy);
205 TLI.setUnavailable(LibFunc::bzero);
206 TLI.setUnavailable(LibFunc::chmod);
207 TLI.setUnavailable(LibFunc::chown);
208 TLI.setUnavailable(LibFunc::closedir);
209 TLI.setUnavailable(LibFunc::ctermid);
210 TLI.setUnavailable(LibFunc::fdopen);
211 TLI.setUnavailable(LibFunc::ffs);
212 TLI.setUnavailable(LibFunc::fileno);
213 TLI.setUnavailable(LibFunc::flockfile);
214 TLI.setUnavailable(LibFunc::fseeko);
215 TLI.setUnavailable(LibFunc::fstat);
216 TLI.setUnavailable(LibFunc::fstatvfs);
217 TLI.setUnavailable(LibFunc::ftello);
218 TLI.setUnavailable(LibFunc::ftrylockfile);
219 TLI.setUnavailable(LibFunc::funlockfile);
220 TLI.setUnavailable(LibFunc::getc_unlocked);
221 TLI.setUnavailable(LibFunc::getitimer);
222 TLI.setUnavailable(LibFunc::getlogin_r);
223 TLI.setUnavailable(LibFunc::getpwnam);
224 TLI.setUnavailable(LibFunc::gettimeofday);
225 TLI.setUnavailable(LibFunc::htonl);
226 TLI.setUnavailable(LibFunc::htons);
227 TLI.setUnavailable(LibFunc::lchown);
228 TLI.setUnavailable(LibFunc::lstat);
229 TLI.setUnavailable(LibFunc::memccpy);
230 TLI.setUnavailable(LibFunc::mkdir);
231 TLI.setUnavailable(LibFunc::ntohl);
232 TLI.setUnavailable(LibFunc::ntohs);
233 TLI.setUnavailable(LibFunc::open);
234 TLI.setUnavailable(LibFunc::opendir);
235 TLI.setUnavailable(LibFunc::pclose);
236 TLI.setUnavailable(LibFunc::popen);
237 TLI.setUnavailable(LibFunc::pread);
238 TLI.setUnavailable(LibFunc::pwrite);
239 TLI.setUnavailable(LibFunc::read);
240 TLI.setUnavailable(LibFunc::readlink);
241 TLI.setUnavailable(LibFunc::realpath);
242 TLI.setUnavailable(LibFunc::rmdir);
243 TLI.setUnavailable(LibFunc::setitimer);
244 TLI.setUnavailable(LibFunc::stat);
245 TLI.setUnavailable(LibFunc::statvfs);
246 TLI.setUnavailable(LibFunc::stpcpy);
247 TLI.setUnavailable(LibFunc::stpncpy);
248 TLI.setUnavailable(LibFunc::strcasecmp);
249 TLI.setUnavailable(LibFunc::strncasecmp);
250 TLI.setUnavailable(LibFunc::times);
251 TLI.setUnavailable(LibFunc::uname);
252 TLI.setUnavailable(LibFunc::unlink);
253 TLI.setUnavailable(LibFunc::unsetenv);
254 TLI.setUnavailable(LibFunc::utime);
255 TLI.setUnavailable(LibFunc::utimes);
256 TLI.setUnavailable(LibFunc::write);
258 // Win32 does *not* provide provide these functions, but they are
260 TLI.setUnavailable(LibFunc::atoll);
261 TLI.setUnavailable(LibFunc::frexpf);
262 TLI.setUnavailable(LibFunc::llabs);
267 // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0
268 // and their names are __exp10 and __exp10f. exp10l is not available on
270 TLI.setUnavailable(LibFunc::exp10l);
271 if (T.isMacOSXVersionLT(10, 9)) {
272 TLI.setUnavailable(LibFunc::exp10);
273 TLI.setUnavailable(LibFunc::exp10f);
275 TLI.setAvailableWithName(LibFunc::exp10, "__exp10");
276 TLI.setAvailableWithName(LibFunc::exp10f, "__exp10f");
280 TLI.setUnavailable(LibFunc::exp10l);
281 if (T.isOSVersionLT(7, 0)) {
282 TLI.setUnavailable(LibFunc::exp10);
283 TLI.setUnavailable(LibFunc::exp10f);
285 TLI.setAvailableWithName(LibFunc::exp10, "__exp10");
286 TLI.setAvailableWithName(LibFunc::exp10f, "__exp10f");
290 // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
291 // buggy prior to glibc version 2.18. Until this version is widely deployed
292 // or we have a reasonable detection strategy, we cannot use exp10 reliably
295 // Fall through to disable all of them.
297 TLI.setUnavailable(LibFunc::exp10);
298 TLI.setUnavailable(LibFunc::exp10f);
299 TLI.setUnavailable(LibFunc::exp10l);
302 // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
304 // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
305 // http://svn.freebsd.org/base/user/eri/pf45/head/lib/libc/string/ffsl.c
306 // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
311 case Triple::FreeBSD:
315 TLI.setUnavailable(LibFunc::ffsl);
318 // ffsll is available on at least FreeBSD and Linux (GLIBC):
319 // http://svn.freebsd.org/base/user/eri/pf45/head/lib/libc/string/ffsll.c
320 // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
322 case Triple::FreeBSD:
326 TLI.setUnavailable(LibFunc::ffsll);
329 // The following functions are available on at least Linux:
330 if (!T.isOSLinux()) {
331 TLI.setUnavailable(LibFunc::dunder_strdup);
332 TLI.setUnavailable(LibFunc::dunder_strtok_r);
333 TLI.setUnavailable(LibFunc::dunder_isoc99_scanf);
334 TLI.setUnavailable(LibFunc::dunder_isoc99_sscanf);
335 TLI.setUnavailable(LibFunc::under_IO_getc);
336 TLI.setUnavailable(LibFunc::under_IO_putc);
337 TLI.setUnavailable(LibFunc::memalign);
338 TLI.setUnavailable(LibFunc::fopen64);
339 TLI.setUnavailable(LibFunc::fseeko64);
340 TLI.setUnavailable(LibFunc::fstat64);
341 TLI.setUnavailable(LibFunc::fstatvfs64);
342 TLI.setUnavailable(LibFunc::ftello64);
343 TLI.setUnavailable(LibFunc::lstat64);
344 TLI.setUnavailable(LibFunc::open64);
345 TLI.setUnavailable(LibFunc::stat64);
346 TLI.setUnavailable(LibFunc::statvfs64);
347 TLI.setUnavailable(LibFunc::tmpfile64);
351 TargetLibraryInfoImpl::TargetLibraryInfoImpl() {
352 // Default to everything being available.
353 memset(AvailableArray, -1, sizeof(AvailableArray));
355 initialize(*this, Triple(), StandardNames);
358 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const Triple &T) {
359 // Default to everything being available.
360 memset(AvailableArray, -1, sizeof(AvailableArray));
362 initialize(*this, T, StandardNames);
365 TargetLibraryInfoImpl::TargetLibraryInfoImpl(const TargetLibraryInfoImpl &TLI)
366 : CustomNames(TLI.CustomNames) {
367 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
370 TargetLibraryInfoImpl::TargetLibraryInfoImpl(TargetLibraryInfoImpl &&TLI)
371 : CustomNames(std::move(TLI.CustomNames)) {
372 std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
376 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(const TargetLibraryInfoImpl &TLI) {
377 CustomNames = TLI.CustomNames;
378 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
382 TargetLibraryInfoImpl &TargetLibraryInfoImpl::operator=(TargetLibraryInfoImpl &&TLI) {
383 CustomNames = std::move(TLI.CustomNames);
384 std::move(std::begin(TLI.AvailableArray), std::end(TLI.AvailableArray),
389 static StringRef sanitizeFunctionName(StringRef funcName) {
390 // Filter out empty names and names containing null bytes, those can't be in
392 if (funcName.empty() || funcName.find('\0') != StringRef::npos)
395 // Check for \01 prefix that is used to mangle __asm declarations and
396 // strip it if present.
397 if (funcName.front() == '\01')
398 funcName = funcName.substr(1);
402 bool TargetLibraryInfoImpl::getLibFunc(StringRef funcName,
403 LibFunc::Func &F) const {
404 const char **Start = &StandardNames[0];
405 const char **End = &StandardNames[LibFunc::NumLibFuncs];
407 funcName = sanitizeFunctionName(funcName);
408 if (funcName.empty())
411 const char **I = std::lower_bound(
412 Start, End, funcName, [](const char *LHS, StringRef RHS) {
413 return std::strncmp(LHS, RHS.data(), RHS.size()) < 0;
415 if (I != End && *I == funcName) {
416 F = (LibFunc::Func)(I - Start);
422 void TargetLibraryInfoImpl::disableAllFunctions() {
423 memset(AvailableArray, 0, sizeof(AvailableArray));
426 TargetLibraryInfo TargetLibraryAnalysis::run(Module &M) {
428 return TargetLibraryInfo(*PresetInfoImpl);
430 return TargetLibraryInfo(lookupInfoImpl(Triple(M.getTargetTriple())));
433 TargetLibraryInfo TargetLibraryAnalysis::run(Function &F) {
435 return TargetLibraryInfo(*PresetInfoImpl);
437 return TargetLibraryInfo(
438 lookupInfoImpl(Triple(F.getParent()->getTargetTriple())));
441 TargetLibraryInfoImpl &TargetLibraryAnalysis::lookupInfoImpl(Triple T) {
442 std::unique_ptr<TargetLibraryInfoImpl> &Impl =
443 Impls[T.normalize()];
445 Impl.reset(new TargetLibraryInfoImpl(T));
451 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass()
452 : ImmutablePass(ID), TLIImpl(), TLI(TLIImpl) {
453 initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
456 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(const Triple &T)
457 : ImmutablePass(ID), TLIImpl(T), TLI(TLIImpl) {
458 initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
461 TargetLibraryInfoWrapperPass::TargetLibraryInfoWrapperPass(
462 const TargetLibraryInfoImpl &TLIImpl)
463 : ImmutablePass(ID), TLIImpl(TLIImpl), TLI(this->TLIImpl) {
464 initializeTargetLibraryInfoWrapperPassPass(*PassRegistry::getPassRegistry());
467 char TargetLibraryAnalysis::PassID;
469 // Register the basic pass.
470 INITIALIZE_PASS(TargetLibraryInfoWrapperPass, "targetlibinfo",
471 "Target Library Information", false, true)
472 char TargetLibraryInfoWrapperPass::ID = 0;
474 void TargetLibraryInfoWrapperPass::anchor() {}