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llvm-6502/lib/Target/TargetLibraryInfo.cpp
Meador Inge 939f500202 Add more functions to the target library information. 
In the process of migrating optimizations from the simplify-libcalls pass
to the instcombine pass I noticed that a few functions are missing from
the target library information.  These functions need to be available for
querying in the instcombine library call simplifiers.  More functions will
probably be added in the future as more simplifiers are migrated to
instcombine.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167659 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-10 03:11:06 +00:00

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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] =
{
"_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",
"__memcpy_chk",
"acos",
"acosf",
"acosh",
"acoshf",
"acoshl",
"acosl",
"asin",
"asinf",
"asinh",
"asinhf",
"asinhl",
"asinl",
"atan",
"atan2",
"atan2f",
"atan2l",
"atanf",
"atanh",
"atanhf",
"atanhl",
"atanl",
"calloc",
"cbrt",
"cbrtf",
"cbrtl",
"ceil",
"ceilf",
"ceill",
"copysign",
"copysignf",
"copysignl",
"cos",
"cosf",
"cosh",
"coshf",
"coshl",
"cosl",
"exp",
"exp10",
"exp10f",
"exp10l",
"exp2",
"exp2f",
"exp2l",
"expf",
"expl",
"expm1",
"expm1f",
"expm1l",
"fabs",
"fabsf",
"fabsl",
"fiprintf",
"floor",
"floorf",
"floorl",
"fmod",
"fmodf",
"fmodl",
"fputc",
"fputs",
"free",
"fwrite",
"iprintf",
"log",
"log10",
"log10f",
"log10l",
"log1p",
"log1pf",
"log1pl",
"log2",
"log2f",
"log2l",
"logb",
"logbf",
"logbl",
"logf",
"logl",
"malloc",
"memchr",
"memcmp",
"memcpy",
"memmove",
"memset",
"memset_pattern16",
"nearbyint",
"nearbyintf",
"nearbyintl",
"posix_memalign",
"pow",
"powf",
"powl",
"putchar",
"puts",
"realloc",
"reallocf",
"rint",
"rintf",
"rintl",
"round",
"roundf",
"roundl",
"sin",
"sinf",
"sinh",
"sinhf",
"sinhl",
"sinl",
"siprintf",
"sqrt",
"sqrtf",
"sqrtl",
"stpcpy",
"strcat",
"strchr",
"strcmp",
"strcpy",
"strcspn",
"strdup",
"strlen",
"strncat",
"strncmp",
"strncpy",
"strndup",
"strnlen",
"strpbrk",
"strrchr",
"strspn",
"strstr",
"strtod",
"strtof",
"strtol",
"strtold",
"strtoll",
"strtoul",
"strtoull",
"tan",
"tanf",
"tanh",
"tanhf",
"tanhl",
"tanl",
"trunc",
"truncf",
"truncl",
"valloc"
};
/// 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::logl);
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 stpcpy. It is provided on POSIX systems:
// http://pubs.opengroup.org/onlinepubs/9699919799/functions/stpcpy.html
TLI.setUnavailable(LibFunc::stpcpy);
}
}
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;
}
bool TargetLibraryInfo::getLibFunc(StringRef funcName,
LibFunc::Func &F) const {
const char **Start = &StandardNames[0];
const char **End = &StandardNames[LibFunc::NumLibFuncs];
const char **I = std::lower_bound(Start, End, funcName);
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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