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/Target/TargetLibraryInfo.h"
15 #include "llvm/ADT/Triple.h"
18 // Register the default implementation.
19 INITIALIZE_PASS(TargetLibraryInfo, "targetlibinfo",
20 "Target Library Information", false, true)
21 char TargetLibraryInfo::ID = 0;
23 void TargetLibraryInfo::anchor() { }
25 const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
30 "_ZnajRKSt9nothrow_t",
32 "_ZnamRKSt9nothrow_t",
34 "_ZnwjRKSt9nothrow_t",
36 "_ZnwmRKSt9nothrow_t",
39 "__cxa_guard_acquire",
40 "__cxa_guard_release",
191 /// initialize - Initialize the set of available library functions based on the
192 /// specified target triple. This should be carefully written so that a missing
193 /// target triple gets a sane set of defaults.
194 static void initialize(TargetLibraryInfo &TLI, const Triple &T,
195 const char **StandardNames) {
196 initializeTargetLibraryInfoPass(*PassRegistry::getPassRegistry());
199 // Verify that the StandardNames array is in alphabetical order.
200 for (unsigned F = 1; F < LibFunc::NumLibFuncs; ++F) {
201 if (strcmp(StandardNames[F-1], StandardNames[F]) >= 0)
202 llvm_unreachable("TargetLibraryInfo function names must be sorted");
206 // memset_pattern16 is only available on iOS 3.0 and Mac OS/X 10.5 and later.
208 if (T.isMacOSXVersionLT(10, 5))
209 TLI.setUnavailable(LibFunc::memset_pattern16);
210 } else if (T.getOS() == Triple::IOS) {
211 if (T.isOSVersionLT(3, 0))
212 TLI.setUnavailable(LibFunc::memset_pattern16);
214 TLI.setUnavailable(LibFunc::memset_pattern16);
217 if (T.isMacOSX() && T.getArch() == Triple::x86 &&
218 !T.isMacOSXVersionLT(10, 7)) {
219 // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
220 // we don't care about) have two versions; on recent OSX, the one we want
221 // has a $UNIX2003 suffix. The two implementations are identical except
222 // for the return value in some edge cases. However, we don't want to
223 // generate code that depends on the old symbols.
224 TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
225 TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
228 // iprintf and friends are only available on XCore and TCE.
229 if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
230 TLI.setUnavailable(LibFunc::iprintf);
231 TLI.setUnavailable(LibFunc::siprintf);
232 TLI.setUnavailable(LibFunc::fiprintf);
235 if (T.getOS() == Triple::Win32) {
236 // Win32 does not support long double
237 TLI.setUnavailable(LibFunc::acosl);
238 TLI.setUnavailable(LibFunc::asinl);
239 TLI.setUnavailable(LibFunc::atanl);
240 TLI.setUnavailable(LibFunc::atan2l);
241 TLI.setUnavailable(LibFunc::ceill);
242 TLI.setUnavailable(LibFunc::copysignl);
243 TLI.setUnavailable(LibFunc::cosl);
244 TLI.setUnavailable(LibFunc::coshl);
245 TLI.setUnavailable(LibFunc::expl);
246 TLI.setUnavailable(LibFunc::fabsf); // Win32 and Win64 both lack fabsf
247 TLI.setUnavailable(LibFunc::fabsl);
248 TLI.setUnavailable(LibFunc::floorl);
249 TLI.setUnavailable(LibFunc::fmodl);
250 TLI.setUnavailable(LibFunc::logl);
251 TLI.setUnavailable(LibFunc::powl);
252 TLI.setUnavailable(LibFunc::sinl);
253 TLI.setUnavailable(LibFunc::sinhl);
254 TLI.setUnavailable(LibFunc::sqrtl);
255 TLI.setUnavailable(LibFunc::tanl);
256 TLI.setUnavailable(LibFunc::tanhl);
258 // Win32 only has C89 math
259 TLI.setUnavailable(LibFunc::acosh);
260 TLI.setUnavailable(LibFunc::acoshf);
261 TLI.setUnavailable(LibFunc::acoshl);
262 TLI.setUnavailable(LibFunc::asinh);
263 TLI.setUnavailable(LibFunc::asinhf);
264 TLI.setUnavailable(LibFunc::asinhl);
265 TLI.setUnavailable(LibFunc::atanh);
266 TLI.setUnavailable(LibFunc::atanhf);
267 TLI.setUnavailable(LibFunc::atanhl);
268 TLI.setUnavailable(LibFunc::cbrt);
269 TLI.setUnavailable(LibFunc::cbrtf);
270 TLI.setUnavailable(LibFunc::cbrtl);
271 TLI.setUnavailable(LibFunc::exp10);
272 TLI.setUnavailable(LibFunc::exp10f);
273 TLI.setUnavailable(LibFunc::exp10l);
274 TLI.setUnavailable(LibFunc::exp2);
275 TLI.setUnavailable(LibFunc::exp2f);
276 TLI.setUnavailable(LibFunc::exp2l);
277 TLI.setUnavailable(LibFunc::expm1);
278 TLI.setUnavailable(LibFunc::expm1f);
279 TLI.setUnavailable(LibFunc::expm1l);
280 TLI.setUnavailable(LibFunc::log2);
281 TLI.setUnavailable(LibFunc::log2f);
282 TLI.setUnavailable(LibFunc::log2l);
283 TLI.setUnavailable(LibFunc::log1p);
284 TLI.setUnavailable(LibFunc::log1pf);
285 TLI.setUnavailable(LibFunc::log1pl);
286 TLI.setUnavailable(LibFunc::logb);
287 TLI.setUnavailable(LibFunc::logbf);
288 TLI.setUnavailable(LibFunc::logbl);
289 TLI.setUnavailable(LibFunc::nearbyint);
290 TLI.setUnavailable(LibFunc::nearbyintf);
291 TLI.setUnavailable(LibFunc::nearbyintl);
292 TLI.setUnavailable(LibFunc::rint);
293 TLI.setUnavailable(LibFunc::rintf);
294 TLI.setUnavailable(LibFunc::rintl);
295 TLI.setUnavailable(LibFunc::round);
296 TLI.setUnavailable(LibFunc::roundf);
297 TLI.setUnavailable(LibFunc::roundl);
298 TLI.setUnavailable(LibFunc::trunc);
299 TLI.setUnavailable(LibFunc::truncf);
300 TLI.setUnavailable(LibFunc::truncl);
302 // Win32 provides some C99 math with mangled names
303 TLI.setAvailableWithName(LibFunc::copysign, "_copysign");
305 if (T.getArch() == Triple::x86) {
306 // Win32 on x86 implements single-precision math functions as macros
307 TLI.setUnavailable(LibFunc::acosf);
308 TLI.setUnavailable(LibFunc::asinf);
309 TLI.setUnavailable(LibFunc::atanf);
310 TLI.setUnavailable(LibFunc::atan2f);
311 TLI.setUnavailable(LibFunc::ceilf);
312 TLI.setUnavailable(LibFunc::copysignf);
313 TLI.setUnavailable(LibFunc::cosf);
314 TLI.setUnavailable(LibFunc::coshf);
315 TLI.setUnavailable(LibFunc::expf);
316 TLI.setUnavailable(LibFunc::floorf);
317 TLI.setUnavailable(LibFunc::fmodf);
318 TLI.setUnavailable(LibFunc::logf);
319 TLI.setUnavailable(LibFunc::powf);
320 TLI.setUnavailable(LibFunc::sinf);
321 TLI.setUnavailable(LibFunc::sinhf);
322 TLI.setUnavailable(LibFunc::sqrtf);
323 TLI.setUnavailable(LibFunc::tanf);
324 TLI.setUnavailable(LibFunc::tanhf);
327 // Win32 does *not* provide stpcpy. It is provided on POSIX systems:
328 // http://pubs.opengroup.org/onlinepubs/9699919799/functions/stpcpy.html
329 TLI.setUnavailable(LibFunc::stpcpy);
334 TargetLibraryInfo::TargetLibraryInfo() : ImmutablePass(ID) {
335 // Default to everything being available.
336 memset(AvailableArray, -1, sizeof(AvailableArray));
338 initialize(*this, Triple(), StandardNames);
341 TargetLibraryInfo::TargetLibraryInfo(const Triple &T) : ImmutablePass(ID) {
342 // Default to everything being available.
343 memset(AvailableArray, -1, sizeof(AvailableArray));
345 initialize(*this, T, StandardNames);
348 TargetLibraryInfo::TargetLibraryInfo(const TargetLibraryInfo &TLI)
349 : ImmutablePass(ID) {
350 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
351 CustomNames = TLI.CustomNames;
354 bool TargetLibraryInfo::getLibFunc(StringRef funcName,
355 LibFunc::Func &F) const {
356 const char **Start = &StandardNames[0];
357 const char **End = &StandardNames[LibFunc::NumLibFuncs];
358 const char **I = std::lower_bound(Start, End, funcName);
359 if (I != End && *I == funcName) {
360 F = (LibFunc::Func)(I - Start);
366 /// disableAllFunctions - This disables all builtins, which is used for options
367 /// like -fno-builtin.
368 void TargetLibraryInfo::disableAllFunctions() {
369 memset(AvailableArray, 0, sizeof(AvailableArray));