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