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 "_ZdaPvRKSt9nothrow_t",
34 "_ZdlPvRKSt9nothrow_t",
38 "_ZnajRKSt9nothrow_t",
40 "_ZnamRKSt9nothrow_t",
42 "_ZnwjRKSt9nothrow_t",
44 "_ZnwmRKSt9nothrow_t",
49 "__cxa_guard_acquire",
50 "__cxa_guard_release",
359 static bool hasSinCosPiStret(const Triple &T) {
360 // Only Darwin variants have _stret versions of combined trig functions.
364 // The ABI is rather complicated on x86, so don't do anything special there.
365 if (T.getArch() == Triple::x86)
368 if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
371 if (T.isiOS() && T.isOSVersionLT(7, 0))
377 /// initialize - Initialize the set of available library functions based on the
378 /// specified target triple. This should be carefully written so that a missing
379 /// target triple gets a sane set of defaults.
380 static void initialize(TargetLibraryInfo &TLI, const Triple &T,
381 const char **StandardNames) {
382 initializeTargetLibraryInfoPass(*PassRegistry::getPassRegistry());
385 // Verify that the StandardNames array is in alphabetical order.
386 for (unsigned F = 1; F < LibFunc::NumLibFuncs; ++F) {
387 if (strcmp(StandardNames[F-1], StandardNames[F]) >= 0)
388 llvm_unreachable("TargetLibraryInfo function names must be sorted");
392 // There are no library implementations of mempcy and memset for AMD gpus and
393 // these can be difficult to lower in the backend.
394 if (T.getArch() == Triple::r600 ||
395 T.getArch() == Triple::amdgcn) {
396 TLI.setUnavailable(LibFunc::memcpy);
397 TLI.setUnavailable(LibFunc::memset);
398 TLI.setUnavailable(LibFunc::memset_pattern16);
402 // memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
404 if (T.isMacOSXVersionLT(10, 5))
405 TLI.setUnavailable(LibFunc::memset_pattern16);
406 } else if (T.isiOS()) {
407 if (T.isOSVersionLT(3, 0))
408 TLI.setUnavailable(LibFunc::memset_pattern16);
410 TLI.setUnavailable(LibFunc::memset_pattern16);
413 if (!hasSinCosPiStret(T)) {
414 TLI.setUnavailable(LibFunc::sinpi);
415 TLI.setUnavailable(LibFunc::sinpif);
416 TLI.setUnavailable(LibFunc::cospi);
417 TLI.setUnavailable(LibFunc::cospif);
418 TLI.setUnavailable(LibFunc::sincospi_stret);
419 TLI.setUnavailable(LibFunc::sincospif_stret);
422 if (T.isMacOSX() && T.getArch() == Triple::x86 &&
423 !T.isMacOSXVersionLT(10, 7)) {
424 // x86-32 OSX has a scheme where fwrite and fputs (and some other functions
425 // we don't care about) have two versions; on recent OSX, the one we want
426 // has a $UNIX2003 suffix. The two implementations are identical except
427 // for the return value in some edge cases. However, we don't want to
428 // generate code that depends on the old symbols.
429 TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
430 TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
433 // iprintf and friends are only available on XCore and TCE.
434 if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
435 TLI.setUnavailable(LibFunc::iprintf);
436 TLI.setUnavailable(LibFunc::siprintf);
437 TLI.setUnavailable(LibFunc::fiprintf);
440 if (T.isOSWindows() && !T.isOSCygMing()) {
441 // Win32 does not support long double
442 TLI.setUnavailable(LibFunc::acosl);
443 TLI.setUnavailable(LibFunc::asinl);
444 TLI.setUnavailable(LibFunc::atanl);
445 TLI.setUnavailable(LibFunc::atan2l);
446 TLI.setUnavailable(LibFunc::ceill);
447 TLI.setUnavailable(LibFunc::copysignl);
448 TLI.setUnavailable(LibFunc::cosl);
449 TLI.setUnavailable(LibFunc::coshl);
450 TLI.setUnavailable(LibFunc::expl);
451 TLI.setUnavailable(LibFunc::fabsf); // Win32 and Win64 both lack fabsf
452 TLI.setUnavailable(LibFunc::fabsl);
453 TLI.setUnavailable(LibFunc::floorl);
454 TLI.setUnavailable(LibFunc::fmaxl);
455 TLI.setUnavailable(LibFunc::fminl);
456 TLI.setUnavailable(LibFunc::fmodl);
457 TLI.setUnavailable(LibFunc::frexpl);
458 TLI.setUnavailable(LibFunc::ldexpf);
459 TLI.setUnavailable(LibFunc::ldexpl);
460 TLI.setUnavailable(LibFunc::logl);
461 TLI.setUnavailable(LibFunc::modfl);
462 TLI.setUnavailable(LibFunc::powl);
463 TLI.setUnavailable(LibFunc::sinl);
464 TLI.setUnavailable(LibFunc::sinhl);
465 TLI.setUnavailable(LibFunc::sqrtl);
466 TLI.setUnavailable(LibFunc::tanl);
467 TLI.setUnavailable(LibFunc::tanhl);
469 // Win32 only has C89 math
470 TLI.setUnavailable(LibFunc::acosh);
471 TLI.setUnavailable(LibFunc::acoshf);
472 TLI.setUnavailable(LibFunc::acoshl);
473 TLI.setUnavailable(LibFunc::asinh);
474 TLI.setUnavailable(LibFunc::asinhf);
475 TLI.setUnavailable(LibFunc::asinhl);
476 TLI.setUnavailable(LibFunc::atanh);
477 TLI.setUnavailable(LibFunc::atanhf);
478 TLI.setUnavailable(LibFunc::atanhl);
479 TLI.setUnavailable(LibFunc::cbrt);
480 TLI.setUnavailable(LibFunc::cbrtf);
481 TLI.setUnavailable(LibFunc::cbrtl);
482 TLI.setUnavailable(LibFunc::exp2);
483 TLI.setUnavailable(LibFunc::exp2f);
484 TLI.setUnavailable(LibFunc::exp2l);
485 TLI.setUnavailable(LibFunc::expm1);
486 TLI.setUnavailable(LibFunc::expm1f);
487 TLI.setUnavailable(LibFunc::expm1l);
488 TLI.setUnavailable(LibFunc::log2);
489 TLI.setUnavailable(LibFunc::log2f);
490 TLI.setUnavailable(LibFunc::log2l);
491 TLI.setUnavailable(LibFunc::log1p);
492 TLI.setUnavailable(LibFunc::log1pf);
493 TLI.setUnavailable(LibFunc::log1pl);
494 TLI.setUnavailable(LibFunc::logb);
495 TLI.setUnavailable(LibFunc::logbf);
496 TLI.setUnavailable(LibFunc::logbl);
497 TLI.setUnavailable(LibFunc::nearbyint);
498 TLI.setUnavailable(LibFunc::nearbyintf);
499 TLI.setUnavailable(LibFunc::nearbyintl);
500 TLI.setUnavailable(LibFunc::rint);
501 TLI.setUnavailable(LibFunc::rintf);
502 TLI.setUnavailable(LibFunc::rintl);
503 TLI.setUnavailable(LibFunc::round);
504 TLI.setUnavailable(LibFunc::roundf);
505 TLI.setUnavailable(LibFunc::roundl);
506 TLI.setUnavailable(LibFunc::trunc);
507 TLI.setUnavailable(LibFunc::truncf);
508 TLI.setUnavailable(LibFunc::truncl);
510 // Win32 provides some C99 math with mangled names
511 TLI.setAvailableWithName(LibFunc::copysign, "_copysign");
513 if (T.getArch() == Triple::x86) {
514 // Win32 on x86 implements single-precision math functions as macros
515 TLI.setUnavailable(LibFunc::acosf);
516 TLI.setUnavailable(LibFunc::asinf);
517 TLI.setUnavailable(LibFunc::atanf);
518 TLI.setUnavailable(LibFunc::atan2f);
519 TLI.setUnavailable(LibFunc::ceilf);
520 TLI.setUnavailable(LibFunc::copysignf);
521 TLI.setUnavailable(LibFunc::cosf);
522 TLI.setUnavailable(LibFunc::coshf);
523 TLI.setUnavailable(LibFunc::expf);
524 TLI.setUnavailable(LibFunc::floorf);
525 TLI.setUnavailable(LibFunc::fminf);
526 TLI.setUnavailable(LibFunc::fmaxf);
527 TLI.setUnavailable(LibFunc::fmodf);
528 TLI.setUnavailable(LibFunc::logf);
529 TLI.setUnavailable(LibFunc::powf);
530 TLI.setUnavailable(LibFunc::sinf);
531 TLI.setUnavailable(LibFunc::sinhf);
532 TLI.setUnavailable(LibFunc::sqrtf);
533 TLI.setUnavailable(LibFunc::tanf);
534 TLI.setUnavailable(LibFunc::tanhf);
537 // Win32 does *not* provide provide these functions, but they are
538 // generally available on POSIX-compliant systems:
539 TLI.setUnavailable(LibFunc::access);
540 TLI.setUnavailable(LibFunc::bcmp);
541 TLI.setUnavailable(LibFunc::bcopy);
542 TLI.setUnavailable(LibFunc::bzero);
543 TLI.setUnavailable(LibFunc::chmod);
544 TLI.setUnavailable(LibFunc::chown);
545 TLI.setUnavailable(LibFunc::closedir);
546 TLI.setUnavailable(LibFunc::ctermid);
547 TLI.setUnavailable(LibFunc::fdopen);
548 TLI.setUnavailable(LibFunc::ffs);
549 TLI.setUnavailable(LibFunc::fileno);
550 TLI.setUnavailable(LibFunc::flockfile);
551 TLI.setUnavailable(LibFunc::fseeko);
552 TLI.setUnavailable(LibFunc::fstat);
553 TLI.setUnavailable(LibFunc::fstatvfs);
554 TLI.setUnavailable(LibFunc::ftello);
555 TLI.setUnavailable(LibFunc::ftrylockfile);
556 TLI.setUnavailable(LibFunc::funlockfile);
557 TLI.setUnavailable(LibFunc::getc_unlocked);
558 TLI.setUnavailable(LibFunc::getitimer);
559 TLI.setUnavailable(LibFunc::getlogin_r);
560 TLI.setUnavailable(LibFunc::getpwnam);
561 TLI.setUnavailable(LibFunc::gettimeofday);
562 TLI.setUnavailable(LibFunc::htonl);
563 TLI.setUnavailable(LibFunc::htons);
564 TLI.setUnavailable(LibFunc::lchown);
565 TLI.setUnavailable(LibFunc::lstat);
566 TLI.setUnavailable(LibFunc::memccpy);
567 TLI.setUnavailable(LibFunc::mkdir);
568 TLI.setUnavailable(LibFunc::ntohl);
569 TLI.setUnavailable(LibFunc::ntohs);
570 TLI.setUnavailable(LibFunc::open);
571 TLI.setUnavailable(LibFunc::opendir);
572 TLI.setUnavailable(LibFunc::pclose);
573 TLI.setUnavailable(LibFunc::popen);
574 TLI.setUnavailable(LibFunc::pread);
575 TLI.setUnavailable(LibFunc::pwrite);
576 TLI.setUnavailable(LibFunc::read);
577 TLI.setUnavailable(LibFunc::readlink);
578 TLI.setUnavailable(LibFunc::realpath);
579 TLI.setUnavailable(LibFunc::rmdir);
580 TLI.setUnavailable(LibFunc::setitimer);
581 TLI.setUnavailable(LibFunc::stat);
582 TLI.setUnavailable(LibFunc::statvfs);
583 TLI.setUnavailable(LibFunc::stpcpy);
584 TLI.setUnavailable(LibFunc::stpncpy);
585 TLI.setUnavailable(LibFunc::strcasecmp);
586 TLI.setUnavailable(LibFunc::strncasecmp);
587 TLI.setUnavailable(LibFunc::times);
588 TLI.setUnavailable(LibFunc::uname);
589 TLI.setUnavailable(LibFunc::unlink);
590 TLI.setUnavailable(LibFunc::unsetenv);
591 TLI.setUnavailable(LibFunc::utime);
592 TLI.setUnavailable(LibFunc::utimes);
593 TLI.setUnavailable(LibFunc::write);
595 // Win32 does *not* provide provide these functions, but they are
597 TLI.setUnavailable(LibFunc::atoll);
598 TLI.setUnavailable(LibFunc::frexpf);
599 TLI.setUnavailable(LibFunc::llabs);
604 // exp10 and exp10f are not available on OS X until 10.9 and iOS until 7.0
605 // and their names are __exp10 and __exp10f. exp10l is not available on
607 TLI.setUnavailable(LibFunc::exp10l);
608 if (T.isMacOSXVersionLT(10, 9)) {
609 TLI.setUnavailable(LibFunc::exp10);
610 TLI.setUnavailable(LibFunc::exp10f);
612 TLI.setAvailableWithName(LibFunc::exp10, "__exp10");
613 TLI.setAvailableWithName(LibFunc::exp10f, "__exp10f");
617 TLI.setUnavailable(LibFunc::exp10l);
618 if (T.isOSVersionLT(7, 0)) {
619 TLI.setUnavailable(LibFunc::exp10);
620 TLI.setUnavailable(LibFunc::exp10f);
622 TLI.setAvailableWithName(LibFunc::exp10, "__exp10");
623 TLI.setAvailableWithName(LibFunc::exp10f, "__exp10f");
627 // exp10, exp10f, exp10l is available on Linux (GLIBC) but are extremely
628 // buggy prior to glibc version 2.18. Until this version is widely deployed
629 // or we have a reasonable detection strategy, we cannot use exp10 reliably
632 // Fall through to disable all of them.
634 TLI.setUnavailable(LibFunc::exp10);
635 TLI.setUnavailable(LibFunc::exp10f);
636 TLI.setUnavailable(LibFunc::exp10l);
639 // ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
641 // http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
642 // http://svn.freebsd.org/base/user/eri/pf45/head/lib/libc/string/ffsl.c
643 // http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
648 case Triple::FreeBSD:
652 TLI.setUnavailable(LibFunc::ffsl);
655 // ffsll is available on at least FreeBSD and Linux (GLIBC):
656 // http://svn.freebsd.org/base/user/eri/pf45/head/lib/libc/string/ffsll.c
657 // http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
659 case Triple::FreeBSD:
663 TLI.setUnavailable(LibFunc::ffsll);
666 // The following functions are available on at least Linux:
667 if (!T.isOSLinux()) {
668 TLI.setUnavailable(LibFunc::dunder_strdup);
669 TLI.setUnavailable(LibFunc::dunder_strtok_r);
670 TLI.setUnavailable(LibFunc::dunder_isoc99_scanf);
671 TLI.setUnavailable(LibFunc::dunder_isoc99_sscanf);
672 TLI.setUnavailable(LibFunc::under_IO_getc);
673 TLI.setUnavailable(LibFunc::under_IO_putc);
674 TLI.setUnavailable(LibFunc::memalign);
675 TLI.setUnavailable(LibFunc::fopen64);
676 TLI.setUnavailable(LibFunc::fseeko64);
677 TLI.setUnavailable(LibFunc::fstat64);
678 TLI.setUnavailable(LibFunc::fstatvfs64);
679 TLI.setUnavailable(LibFunc::ftello64);
680 TLI.setUnavailable(LibFunc::lstat64);
681 TLI.setUnavailable(LibFunc::open64);
682 TLI.setUnavailable(LibFunc::stat64);
683 TLI.setUnavailable(LibFunc::statvfs64);
684 TLI.setUnavailable(LibFunc::tmpfile64);
689 TargetLibraryInfo::TargetLibraryInfo() : ImmutablePass(ID) {
690 // Default to everything being available.
691 memset(AvailableArray, -1, sizeof(AvailableArray));
693 initialize(*this, Triple(), StandardNames);
696 TargetLibraryInfo::TargetLibraryInfo(const Triple &T) : ImmutablePass(ID) {
697 // Default to everything being available.
698 memset(AvailableArray, -1, sizeof(AvailableArray));
700 initialize(*this, T, StandardNames);
703 TargetLibraryInfo::TargetLibraryInfo(const TargetLibraryInfo &TLI)
704 : ImmutablePass(ID) {
705 memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
706 CustomNames = TLI.CustomNames;
710 struct StringComparator {
711 /// Compare two strings and return true if LHS is lexicographically less than
712 /// RHS. Requires that RHS doesn't contain any zero bytes.
713 bool operator()(const char *LHS, StringRef RHS) const {
714 // Compare prefixes with strncmp. If prefixes match we know that LHS is
715 // greater or equal to RHS as RHS can't contain any '\0'.
716 return std::strncmp(LHS, RHS.data(), RHS.size()) < 0;
719 // Provided for compatibility with MSVC's debug mode.
720 bool operator()(StringRef LHS, const char *RHS) const { return LHS < RHS; }
721 bool operator()(StringRef LHS, StringRef RHS) const { return LHS < RHS; }
722 bool operator()(const char *LHS, const char *RHS) const {
723 return std::strcmp(LHS, RHS) < 0;
728 bool TargetLibraryInfo::getLibFunc(StringRef funcName,
729 LibFunc::Func &F) const {
730 const char **Start = &StandardNames[0];
731 const char **End = &StandardNames[LibFunc::NumLibFuncs];
733 // Filter out empty names and names containing null bytes, those can't be in
735 if (funcName.empty() || funcName.find('\0') != StringRef::npos)
738 // Check for \01 prefix that is used to mangle __asm declarations and
739 // strip it if present.
740 if (funcName.front() == '\01')
741 funcName = funcName.substr(1);
742 const char **I = std::lower_bound(Start, End, funcName, StringComparator());
743 if (I != End && *I == funcName) {
744 F = (LibFunc::Func)(I - Start);
750 /// disableAllFunctions - This disables all builtins, which is used for options
751 /// like -fno-builtin.
752 void TargetLibraryInfo::disableAllFunctions() {
753 memset(AvailableArray, 0, sizeof(AvailableArray));