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