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freebsd-skq/contrib/llvm/lib/Target/TargetLibraryInfo.cpp
dim 9cedb8bb69 MFC 261991: 
Upgrade our copy of llvm/clang to 3.4 release.  This version supports
all of the features in the current working draft of the upcoming C++
standard, provisionally named C++1y.

The code generator's performance is greatly increased, and the loop
auto-vectorizer is now enabled at -Os and -O2 in addition to -O3.  The
PowerPC backend has made several major improvements to code generation
quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ
backends have all seen major feature work.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.4/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html>

MFC 262121 (by emaste):

Update lldb for clang/llvm 3.4 import

This commit largely restores the lldb source to the upstream r196259
snapshot with the addition of threaded inferior support and a few bug
fixes.

Specific upstream lldb revisions restored include:
   SVN      git
  181387  779e6ac
  181703  7bef4e2
  182099  b31044e
  182650  f2dcf35
  182683  0d91b80
  183862  15c1774
  183929  99447a6
  184177  0b2934b
  184948  4dc3761
  184954  007e7bc
  186990  eebd175

Sponsored by:	DARPA, AFRL

MFC 262186 (by emaste):

Fix mismerge in r262121

A break statement was lost in the merge.  The error had no functional
impact, but restore it to reduce the diff against upstream.

MFC 262303:

Pull in r197521 from upstream clang trunk (by rdivacky):

  Use the integrated assembler by default on FreeBSD/ppc and ppc64.

Requested by:	jhibbits

MFC 262611:

Pull in r196874 from upstream llvm trunk:

  Fix a crash that occurs when PWD is invalid.

  MCJIT needs to be able to run in hostile environments, even when PWD
  is invalid. There's no need to crash MCJIT in this case.

  The obvious fix is to simply leave MCContext's CompilationDir empty
  when PWD can't be determined. This way, MCJIT clients,
  and other clients that link with LLVM don't need a valid working directory.

  If we do want to guarantee valid CompilationDir, that should be done
  only for clients of getCompilationDir(). This is as simple as checking
  for an empty string.

  The only current use of getCompilationDir is EmitGenDwarfInfo, which
  won't conceivably run with an invalid working dir. However, in the
  purely hypothetically and untestable case that this happens, the
  AT_comp_dir will be omitted from the compilation_unit DIE.

This should help fix assertions occurring with ports-mgmt/tinderbox,
when it is using jails, and sometimes invalidates clang's current
working directory.

Reported by:	decke

MFC 262809:

Pull in r203007 from upstream clang trunk:

  Don't produce an alias between destructors with different calling conventions.

  Fixes pr19007.

(Please note that is an LLVM PR identifier, not a FreeBSD one.)

This should fix Firefox and/or libxul crashes (due to problems with
regparm/stdcall calling conventions) on i386.

Reported by:	multiple users on freebsd-current
PR:		bin/187103

MFC 263048:

Repair recognition of "CC" as an alias for the C++ compiler, since it
was silently broken by upstream for a Windows-specific use-case.

Apparently some versions of CMake still rely on this archaic feature...

Reported by:	rakuco

MFC 263049:

Garbage collect the old way of adding the libstdc++ include directories
in clang's InitHeaderSearch.cpp.  This has been superseded by David
Chisnall's commit in r255321.

Moreover, if libc++ is used, the libstdc++ include directories should
not be in the search path at all.  These directories are now only used
if you pass -stdlib=libstdc++.
2014-03-21 17:53:59 +00:00

686 lines
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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",
"_ZdaPvRKSt9nothrow_t",
"_ZdlPv",
"_ZdlPvRKSt9nothrow_t",
"_Znaj",
"_ZnajRKSt9nothrow_t",
"_Znam",
"_ZnamRKSt9nothrow_t",
"_Znwj",
"_ZnwjRKSt9nothrow_t",
"_Znwm",
"_ZnwmRKSt9nothrow_t",
"__cospi",
"__cospif",
"__cxa_atexit",
"__cxa_guard_abort",
"__cxa_guard_acquire",
"__cxa_guard_release",
"__isoc99_scanf",
"__isoc99_sscanf",
"__memcpy_chk",
"__sincospi_stret",
"__sincospi_stretf",
"__sinpi",
"__sinpif",
"__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",
"gettimeofday",
"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"
};
static bool hasSinCosPiStret(const Triple &T) {
// Only Darwin variants have _stret versions of combined trig functions.
if (!T.isMacOSX() && T.getOS() != Triple::IOS)
return false;
// The ABI is rather complicated on x86, so don't do anything special there.
if (T.getArch() == Triple::x86)
return false;
if (T.isMacOSX() && T.isMacOSXVersionLT(10, 9))
return false;
if (T.getOS() == Triple::IOS && T.isOSVersionLT(7, 0))
return false;
return true;
}
/// 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.isiOS()) {
if (T.isOSVersionLT(3, 0))
TLI.setUnavailable(LibFunc::memset_pattern16);
} else {
TLI.setUnavailable(LibFunc::memset_pattern16);
}
if (!hasSinCosPiStret(T)) {
TLI.setUnavailable(LibFunc::sinpi);
TLI.setUnavailable(LibFunc::sinpif);
TLI.setUnavailable(LibFunc::cospi);
TLI.setUnavailable(LibFunc::cospif);
TLI.setUnavailable(LibFunc::sincospi_stret);
TLI.setUnavailable(LibFunc::sincospi_stretf);
}
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::gettimeofday);
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.isOSLinux()) {
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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