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llvm-mirror/lib/Target/TargetLibraryInfo.cpp
Preston Gurd 8be7e42cc2 Convert sqrt functions into sqrt instructions when -ffast-math is in effect. 
When -ffast-math is in effect (on Linux, at least), clang defines
__FINITE_MATH_ONLY__ > 0 when including <math.h>. This causes the
preprocessor to include <bits/math-finite.h>, which renames the sqrt functions.
For instance, "sqrt" is renamed as "__sqrt_finite". 

This patch adds the 3 new names in such a way that they will be treated
as equivalent to their respective original names.

llvm-svn: 182739
2013-05-27 15:44:35 +00:00

649 lines
17 KiB
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//===-- TargetLibraryInfo.cpp - Runtime library information ----------------==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the TargetLibraryInfo class.
//
//===----------------------------------------------------------------------===//
#include "llvm/Target/TargetLibraryInfo.h"
#include "llvm/ADT/Triple.h"
using namespace llvm;
// Register the default implementation.
INITIALIZE_PASS(TargetLibraryInfo, "targetlibinfo",
"Target Library Information", false, true)
char TargetLibraryInfo::ID = 0;
void TargetLibraryInfo::anchor() { }
const char* TargetLibraryInfo::StandardNames[LibFunc::NumLibFuncs] =
{
"_IO_getc",
"_IO_putc",
"_ZdaPv",
"_ZdlPv",
"_Znaj",
"_ZnajRKSt9nothrow_t",
"_Znam",
"_ZnamRKSt9nothrow_t",
"_Znwj",
"_ZnwjRKSt9nothrow_t",
"_Znwm",
"_ZnwmRKSt9nothrow_t",
"__cxa_atexit",
"__cxa_guard_abort",
"__cxa_guard_acquire",
"__cxa_guard_release",
"__isoc99_scanf",
"__isoc99_sscanf",
"__memcpy_chk",
"__sqrt_finite",
"__sqrtf_finite",
"__sqrtl_finite",
"__strdup",
"__strndup",
"__strtok_r",
"abs",
"access",
"acos",
"acosf",
"acosh",
"acoshf",
"acoshl",
"acosl",
"asin",
"asinf",
"asinh",
"asinhf",
"asinhl",
"asinl",
"atan",
"atan2",
"atan2f",
"atan2l",
"atanf",
"atanh",
"atanhf",
"atanhl",
"atanl",
"atof",
"atoi",
"atol",
"atoll",
"bcmp",
"bcopy",
"bzero",
"calloc",
"cbrt",
"cbrtf",
"cbrtl",
"ceil",
"ceilf",
"ceill",
"chmod",
"chown",
"clearerr",
"closedir",
"copysign",
"copysignf",
"copysignl",
"cos",
"cosf",
"cosh",
"coshf",
"coshl",
"cosl",
"ctermid",
"exp",
"exp10",
"exp10f",
"exp10l",
"exp2",
"exp2f",
"exp2l",
"expf",
"expl",
"expm1",
"expm1f",
"expm1l",
"fabs",
"fabsf",
"fabsl",
"fclose",
"fdopen",
"feof",
"ferror",
"fflush",
"ffs",
"ffsl",
"ffsll",
"fgetc",
"fgetpos",
"fgets",
"fileno",
"fiprintf",
"flockfile",
"floor",
"floorf",
"floorl",
"fmod",
"fmodf",
"fmodl",
"fopen",
"fopen64",
"fprintf",
"fputc",
"fputs",
"fread",
"free",
"frexp",
"frexpf",
"frexpl",
"fscanf",
"fseek",
"fseeko",
"fseeko64",
"fsetpos",
"fstat",
"fstat64",
"fstatvfs",
"fstatvfs64",
"ftell",
"ftello",
"ftello64",
"ftrylockfile",
"funlockfile",
"fwrite",
"getc",
"getc_unlocked",
"getchar",
"getenv",
"getitimer",
"getlogin_r",
"getpwnam",
"gets",
"htonl",
"htons",
"iprintf",
"isascii",
"isdigit",
"labs",
"lchown",
"llabs",
"log",
"log10",
"log10f",
"log10l",
"log1p",
"log1pf",
"log1pl",
"log2",
"log2f",
"log2l",
"logb",
"logbf",
"logbl",
"logf",
"logl",
"lstat",
"lstat64",
"malloc",
"memalign",
"memccpy",
"memchr",
"memcmp",
"memcpy",
"memmove",
"memrchr",
"memset",
"memset_pattern16",
"mkdir",
"mktime",
"modf",
"modff",
"modfl",
"nearbyint",
"nearbyintf",
"nearbyintl",
"ntohl",
"ntohs",
"open",
"open64",
"opendir",
"pclose",
"perror",
"popen",
"posix_memalign",
"pow",
"powf",
"powl",
"pread",
"printf",
"putc",
"putchar",
"puts",
"pwrite",
"qsort",
"read",
"readlink",
"realloc",
"reallocf",
"realpath",
"remove",
"rename",
"rewind",
"rint",
"rintf",
"rintl",
"rmdir",
"round",
"roundf",
"roundl",
"scanf",
"setbuf",
"setitimer",
"setvbuf",
"sin",
"sinf",
"sinh",
"sinhf",
"sinhl",
"sinl",
"siprintf",
"snprintf",
"sprintf",
"sqrt",
"sqrtf",
"sqrtl",
"sscanf",
"stat",
"stat64",
"statvfs",
"statvfs64",
"stpcpy",
"stpncpy",
"strcasecmp",
"strcat",
"strchr",
"strcmp",
"strcoll",
"strcpy",
"strcspn",
"strdup",
"strlen",
"strncasecmp",
"strncat",
"strncmp",
"strncpy",
"strndup",
"strnlen",
"strpbrk",
"strrchr",
"strspn",
"strstr",
"strtod",
"strtof",
"strtok",
"strtok_r",
"strtol",
"strtold",
"strtoll",
"strtoul",
"strtoull",
"strxfrm",
"system",
"tan",
"tanf",
"tanh",
"tanhf",
"tanhl",
"tanl",
"times",
"tmpfile",
"tmpfile64",
"toascii",
"trunc",
"truncf",
"truncl",
"uname",
"ungetc",
"unlink",
"unsetenv",
"utime",
"utimes",
"valloc",
"vfprintf",
"vfscanf",
"vprintf",
"vscanf",
"vsnprintf",
"vsprintf",
"vsscanf",
"write"
};
/// initialize - Initialize the set of available library functions based on the
/// specified target triple. This should be carefully written so that a missing
/// target triple gets a sane set of defaults.
static void initialize(TargetLibraryInfo &TLI, const Triple &T,
const char **StandardNames) {
initializeTargetLibraryInfoPass(*PassRegistry::getPassRegistry());
#ifndef NDEBUG
// Verify that the StandardNames array is in alphabetical order.
for (unsigned F = 1; F < LibFunc::NumLibFuncs; ++F) {
if (strcmp(StandardNames[F-1], StandardNames[F]) >= 0)
llvm_unreachable("TargetLibraryInfo function names must be sorted");
}
#endif // !NDEBUG
// memset_pattern16 is only available on iOS 3.0 and Mac OS/X 10.5 and later.
if (T.isMacOSX()) {
if (T.isMacOSXVersionLT(10, 5))
TLI.setUnavailable(LibFunc::memset_pattern16);
} else if (T.getOS() == Triple::IOS) {
if (T.isOSVersionLT(3, 0))
TLI.setUnavailable(LibFunc::memset_pattern16);
} else {
TLI.setUnavailable(LibFunc::memset_pattern16);
}
if (T.isMacOSX() && T.getArch() == Triple::x86 &&
!T.isMacOSXVersionLT(10, 7)) {
// x86-32 OSX has a scheme where fwrite and fputs (and some other functions
// we don't care about) have two versions; on recent OSX, the one we want
// has a $UNIX2003 suffix. The two implementations are identical except
// for the return value in some edge cases. However, we don't want to
// generate code that depends on the old symbols.
TLI.setAvailableWithName(LibFunc::fwrite, "fwrite$UNIX2003");
TLI.setAvailableWithName(LibFunc::fputs, "fputs$UNIX2003");
}
// iprintf and friends are only available on XCore and TCE.
if (T.getArch() != Triple::xcore && T.getArch() != Triple::tce) {
TLI.setUnavailable(LibFunc::iprintf);
TLI.setUnavailable(LibFunc::siprintf);
TLI.setUnavailable(LibFunc::fiprintf);
}
if (T.getOS() == Triple::Win32) {
// Win32 does not support long double
TLI.setUnavailable(LibFunc::acosl);
TLI.setUnavailable(LibFunc::asinl);
TLI.setUnavailable(LibFunc::atanl);
TLI.setUnavailable(LibFunc::atan2l);
TLI.setUnavailable(LibFunc::ceill);
TLI.setUnavailable(LibFunc::copysignl);
TLI.setUnavailable(LibFunc::cosl);
TLI.setUnavailable(LibFunc::coshl);
TLI.setUnavailable(LibFunc::expl);
TLI.setUnavailable(LibFunc::fabsf); // Win32 and Win64 both lack fabsf
TLI.setUnavailable(LibFunc::fabsl);
TLI.setUnavailable(LibFunc::floorl);
TLI.setUnavailable(LibFunc::fmodl);
TLI.setUnavailable(LibFunc::frexpl);
TLI.setUnavailable(LibFunc::logl);
TLI.setUnavailable(LibFunc::modfl);
TLI.setUnavailable(LibFunc::powl);
TLI.setUnavailable(LibFunc::sinl);
TLI.setUnavailable(LibFunc::sinhl);
TLI.setUnavailable(LibFunc::sqrtl);
TLI.setUnavailable(LibFunc::tanl);
TLI.setUnavailable(LibFunc::tanhl);
// Win32 only has C89 math
TLI.setUnavailable(LibFunc::acosh);
TLI.setUnavailable(LibFunc::acoshf);
TLI.setUnavailable(LibFunc::acoshl);
TLI.setUnavailable(LibFunc::asinh);
TLI.setUnavailable(LibFunc::asinhf);
TLI.setUnavailable(LibFunc::asinhl);
TLI.setUnavailable(LibFunc::atanh);
TLI.setUnavailable(LibFunc::atanhf);
TLI.setUnavailable(LibFunc::atanhl);
TLI.setUnavailable(LibFunc::cbrt);
TLI.setUnavailable(LibFunc::cbrtf);
TLI.setUnavailable(LibFunc::cbrtl);
TLI.setUnavailable(LibFunc::exp10);
TLI.setUnavailable(LibFunc::exp10f);
TLI.setUnavailable(LibFunc::exp10l);
TLI.setUnavailable(LibFunc::exp2);
TLI.setUnavailable(LibFunc::exp2f);
TLI.setUnavailable(LibFunc::exp2l);
TLI.setUnavailable(LibFunc::expm1);
TLI.setUnavailable(LibFunc::expm1f);
TLI.setUnavailable(LibFunc::expm1l);
TLI.setUnavailable(LibFunc::log2);
TLI.setUnavailable(LibFunc::log2f);
TLI.setUnavailable(LibFunc::log2l);
TLI.setUnavailable(LibFunc::log1p);
TLI.setUnavailable(LibFunc::log1pf);
TLI.setUnavailable(LibFunc::log1pl);
TLI.setUnavailable(LibFunc::logb);
TLI.setUnavailable(LibFunc::logbf);
TLI.setUnavailable(LibFunc::logbl);
TLI.setUnavailable(LibFunc::nearbyint);
TLI.setUnavailable(LibFunc::nearbyintf);
TLI.setUnavailable(LibFunc::nearbyintl);
TLI.setUnavailable(LibFunc::rint);
TLI.setUnavailable(LibFunc::rintf);
TLI.setUnavailable(LibFunc::rintl);
TLI.setUnavailable(LibFunc::round);
TLI.setUnavailable(LibFunc::roundf);
TLI.setUnavailable(LibFunc::roundl);
TLI.setUnavailable(LibFunc::trunc);
TLI.setUnavailable(LibFunc::truncf);
TLI.setUnavailable(LibFunc::truncl);
// Win32 provides some C99 math with mangled names
TLI.setAvailableWithName(LibFunc::copysign, "_copysign");
if (T.getArch() == Triple::x86) {
// Win32 on x86 implements single-precision math functions as macros
TLI.setUnavailable(LibFunc::acosf);
TLI.setUnavailable(LibFunc::asinf);
TLI.setUnavailable(LibFunc::atanf);
TLI.setUnavailable(LibFunc::atan2f);
TLI.setUnavailable(LibFunc::ceilf);
TLI.setUnavailable(LibFunc::copysignf);
TLI.setUnavailable(LibFunc::cosf);
TLI.setUnavailable(LibFunc::coshf);
TLI.setUnavailable(LibFunc::expf);
TLI.setUnavailable(LibFunc::floorf);
TLI.setUnavailable(LibFunc::fmodf);
TLI.setUnavailable(LibFunc::logf);
TLI.setUnavailable(LibFunc::powf);
TLI.setUnavailable(LibFunc::sinf);
TLI.setUnavailable(LibFunc::sinhf);
TLI.setUnavailable(LibFunc::sqrtf);
TLI.setUnavailable(LibFunc::tanf);
TLI.setUnavailable(LibFunc::tanhf);
}
// Win32 does *not* provide provide these functions, but they are
// generally available on POSIX-compliant systems:
TLI.setUnavailable(LibFunc::access);
TLI.setUnavailable(LibFunc::bcmp);
TLI.setUnavailable(LibFunc::bcopy);
TLI.setUnavailable(LibFunc::bzero);
TLI.setUnavailable(LibFunc::chmod);
TLI.setUnavailable(LibFunc::chown);
TLI.setUnavailable(LibFunc::closedir);
TLI.setUnavailable(LibFunc::ctermid);
TLI.setUnavailable(LibFunc::fdopen);
TLI.setUnavailable(LibFunc::ffs);
TLI.setUnavailable(LibFunc::fileno);
TLI.setUnavailable(LibFunc::flockfile);
TLI.setUnavailable(LibFunc::fseeko);
TLI.setUnavailable(LibFunc::fstat);
TLI.setUnavailable(LibFunc::fstatvfs);
TLI.setUnavailable(LibFunc::ftello);
TLI.setUnavailable(LibFunc::ftrylockfile);
TLI.setUnavailable(LibFunc::funlockfile);
TLI.setUnavailable(LibFunc::getc_unlocked);
TLI.setUnavailable(LibFunc::getitimer);
TLI.setUnavailable(LibFunc::getlogin_r);
TLI.setUnavailable(LibFunc::getpwnam);
TLI.setUnavailable(LibFunc::htonl);
TLI.setUnavailable(LibFunc::htons);
TLI.setUnavailable(LibFunc::lchown);
TLI.setUnavailable(LibFunc::lstat);
TLI.setUnavailable(LibFunc::memccpy);
TLI.setUnavailable(LibFunc::mkdir);
TLI.setUnavailable(LibFunc::ntohl);
TLI.setUnavailable(LibFunc::ntohs);
TLI.setUnavailable(LibFunc::open);
TLI.setUnavailable(LibFunc::opendir);
TLI.setUnavailable(LibFunc::pclose);
TLI.setUnavailable(LibFunc::popen);
TLI.setUnavailable(LibFunc::pread);
TLI.setUnavailable(LibFunc::pwrite);
TLI.setUnavailable(LibFunc::read);
TLI.setUnavailable(LibFunc::readlink);
TLI.setUnavailable(LibFunc::realpath);
TLI.setUnavailable(LibFunc::rmdir);
TLI.setUnavailable(LibFunc::setitimer);
TLI.setUnavailable(LibFunc::stat);
TLI.setUnavailable(LibFunc::statvfs);
TLI.setUnavailable(LibFunc::stpcpy);
TLI.setUnavailable(LibFunc::stpncpy);
TLI.setUnavailable(LibFunc::strcasecmp);
TLI.setUnavailable(LibFunc::strncasecmp);
TLI.setUnavailable(LibFunc::times);
TLI.setUnavailable(LibFunc::uname);
TLI.setUnavailable(LibFunc::unlink);
TLI.setUnavailable(LibFunc::unsetenv);
TLI.setUnavailable(LibFunc::utime);
TLI.setUnavailable(LibFunc::utimes);
TLI.setUnavailable(LibFunc::write);
// Win32 does *not* provide provide these functions, but they are
// specified by C99:
TLI.setUnavailable(LibFunc::atoll);
TLI.setUnavailable(LibFunc::frexpf);
TLI.setUnavailable(LibFunc::llabs);
}
// ffsl is available on at least Darwin, Mac OS X, iOS, FreeBSD, and
// Linux (GLIBC):
// http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/ffsl.3.html
// http://svn.freebsd.org/base/user/eri/pf45/head/lib/libc/string/ffsl.c
// http://www.gnu.org/software/gnulib/manual/html_node/ffsl.html
switch (T.getOS()) {
case Triple::Darwin:
case Triple::MacOSX:
case Triple::IOS:
case Triple::FreeBSD:
case Triple::Linux:
break;
default:
TLI.setUnavailable(LibFunc::ffsl);
}
// ffsll is available on at least FreeBSD and Linux (GLIBC):
// http://svn.freebsd.org/base/user/eri/pf45/head/lib/libc/string/ffsll.c
// http://www.gnu.org/software/gnulib/manual/html_node/ffsll.html
switch (T.getOS()) {
case Triple::FreeBSD:
case Triple::Linux:
break;
default:
TLI.setUnavailable(LibFunc::ffsll);
}
// The following functions are available on at least Linux:
if (T.getOS() != Triple::Linux) {
TLI.setUnavailable(LibFunc::dunder_strdup);
TLI.setUnavailable(LibFunc::dunder_strtok_r);
TLI.setUnavailable(LibFunc::dunder_isoc99_scanf);
TLI.setUnavailable(LibFunc::dunder_isoc99_sscanf);
TLI.setUnavailable(LibFunc::under_IO_getc);
TLI.setUnavailable(LibFunc::under_IO_putc);
TLI.setUnavailable(LibFunc::memalign);
TLI.setUnavailable(LibFunc::fopen64);
TLI.setUnavailable(LibFunc::fseeko64);
TLI.setUnavailable(LibFunc::fstat64);
TLI.setUnavailable(LibFunc::fstatvfs64);
TLI.setUnavailable(LibFunc::ftello64);
TLI.setUnavailable(LibFunc::lstat64);
TLI.setUnavailable(LibFunc::open64);
TLI.setUnavailable(LibFunc::stat64);
TLI.setUnavailable(LibFunc::statvfs64);
TLI.setUnavailable(LibFunc::tmpfile64);
}
}
TargetLibraryInfo::TargetLibraryInfo() : ImmutablePass(ID) {
// Default to everything being available.
memset(AvailableArray, -1, sizeof(AvailableArray));
initialize(*this, Triple(), StandardNames);
}
TargetLibraryInfo::TargetLibraryInfo(const Triple &T) : ImmutablePass(ID) {
// Default to everything being available.
memset(AvailableArray, -1, sizeof(AvailableArray));
initialize(*this, T, StandardNames);
}
TargetLibraryInfo::TargetLibraryInfo(const TargetLibraryInfo &TLI)
: ImmutablePass(ID) {
memcpy(AvailableArray, TLI.AvailableArray, sizeof(AvailableArray));
CustomNames = TLI.CustomNames;
}
namespace {
struct StringComparator {
/// Compare two strings and return true if LHS is lexicographically less than
/// RHS. Requires that RHS doesn't contain any zero bytes.
bool operator()(const char *LHS, StringRef RHS) const {
// Compare prefixes with strncmp. If prefixes match we know that LHS is
// greater or equal to RHS as RHS can't contain any '\0'.
return std::strncmp(LHS, RHS.data(), RHS.size()) < 0;
}
// Provided for compatibility with MSVC's debug mode.
bool operator()(StringRef LHS, const char *RHS) const { return LHS < RHS; }
bool operator()(StringRef LHS, StringRef RHS) const { return LHS < RHS; }
bool operator()(const char *LHS, const char *RHS) const {
return std::strcmp(LHS, RHS) < 0;
}
};
}
bool TargetLibraryInfo::getLibFunc(StringRef funcName,
LibFunc::Func &F) const {
const char **Start = &StandardNames[0];
const char **End = &StandardNames[LibFunc::NumLibFuncs];
// Filter out empty names and names containing null bytes, those can't be in
// our table.
if (funcName.empty() || funcName.find('\0') != StringRef::npos)
return false;
// Check for \01 prefix that is used to mangle __asm declarations and
// strip it if present.
if (funcName.front() == '\01')
funcName = funcName.substr(1);
const char **I = std::lower_bound(Start, End, funcName, StringComparator());
if (I != End && *I == funcName) {
F = (LibFunc::Func)(I - Start);
return true;
}
return false;
}
/// disableAllFunctions - This disables all builtins, which is used for options
/// like -fno-builtin.
void TargetLibraryInfo::disableAllFunctions() {
memset(AvailableArray, 0, sizeof(AvailableArray));
}
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