[llvm] r292188 - [TLI] Add prototype checking for all remaining LibFuncs.

Galina Kistanova via llvm-commits llvm-commits at lists.llvm.org
Tue Jan 17 11:43:16 PST 2017


Hello Ahmed,

One of your resent commits added warning our builder:

llvm.src\lib\analysis\targetlibraryinfo.cpp(1183) :  warning C4715:
'llvm::TargetLibraryInfoImpl::isValidProtoForLibFunc': not all control
paths return a value

http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/4032

Please have a look at this?

Thanks

Galina

On Mon, Jan 16, 2017 at 7:10 PM, Ahmed Bougacha via llvm-commits <
llvm-commits at lists.llvm.org> wrote:

> Author: ab
> Date: Mon Jan 16 21:10:02 2017
> New Revision: 292188
>
> URL: http://llvm.org/viewvc/llvm-project?rev=292188&view=rev
> Log:
> [TLI] Add prototype checking for all remaining LibFuncs.
>
> This is another step towards unifying all LibFunc prototype checks.
> This work started in r267758 (D19469);  add the remaining checks.
>
> Also add a unittest that checks each libfunc declared with a known-valid
> and known-invalid prototype.  New libfuncs added in the future are
> required to have prototype checking in place; the known-valid test will
> fail otherwise.
>
> Differential Revision: https://reviews.llvm.org/D28030
>
> Added:
>     llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp
> Modified:
>     llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp
>     llvm/trunk/unittests/Analysis/CMakeLists.txt
>
> Modified: llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/
> Analysis/TargetLibraryInfo.cpp?rev=292188&r1=292187&r2=292188&view=diff
> ============================================================
> ==================
> --- llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp (original)
> +++ llvm/trunk/lib/Analysis/TargetLibraryInfo.cpp Mon Jan 16 21:10:02 2017
> @@ -638,6 +638,7 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::sscanf:
>    case LibFunc::stat:
>    case LibFunc::statvfs:
> +  case LibFunc::siprintf:
>    case LibFunc::sprintf:
>      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
>              FTy.getParamType(1)->isPointerTy());
> @@ -652,16 +653,16 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::malloc:
>      return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
>    case LibFunc::memcmp:
> -    return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
> -            FTy.getParamType(1)->isPointerTy() &&
> -            FTy.getReturnType()->isIntegerTy(32));
> +    return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
> +            FTy.getParamType(0)->isPointerTy() &&
> +            FTy.getParamType(1)->isPointerTy());
>
>    case LibFunc::memchr:
>    case LibFunc::memrchr:
> -    return (NumParams == 3 && FTy.getParamType(0)->isPointerTy() &&
> +    return (NumParams == 3 && FTy.getReturnType()->isPointerTy() &&
> +            FTy.getReturnType() == FTy.getParamType(0) &&
>              FTy.getParamType(1)->isIntegerTy(32) &&
> -            FTy.getParamType(2)->isIntegerTy() &&
> -            FTy.getReturnType()->isPointerTy());
> +            IsSizeTTy(FTy.getParamType(2)));
>    case LibFunc::modf:
>    case LibFunc::modff:
>    case LibFunc::modfl:
> @@ -697,8 +698,10 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::memalign:
>      return (FTy.getReturnType()->isPointerTy());
>    case LibFunc::realloc:
> -    return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
> -            FTy.getReturnType()->isPointerTy());
> +  case LibFunc::reallocf:
> +    return (NumParams == 2 && FTy.getReturnType() == PCharTy &&
> +            FTy.getParamType(0) == FTy.getReturnType() &&
> +            IsSizeTTy(FTy.getParamType(1)));
>    case LibFunc::read:
>      return (NumParams == 3 && FTy.getParamType(1)->isPointerTy());
>    case LibFunc::rewind:
> @@ -730,6 +733,7 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::ferror:
>    case LibFunc::getenv:
>    case LibFunc::getpwnam:
> +  case LibFunc::iprintf:
>    case LibFunc::pclose:
>    case LibFunc::perror:
>    case LibFunc::printf:
> @@ -740,6 +744,7 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::unsetenv:
>      return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
>
> +  case LibFunc::access:
>    case LibFunc::chmod:
>    case LibFunc::chown:
>    case LibFunc::clearerr:
> @@ -769,8 +774,6 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::times:
>      return (NumParams != 0 && FTy.getParamType(0)->isPointerTy());
>
> -  case LibFunc::access:
> -    return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
>    case LibFunc::fopen:
>      return (NumParams == 2 && FTy.getReturnType()->isPointerTy() &&
>              FTy.getParamType(0)->isPointerTy() &&
> @@ -801,14 +804,18 @@ bool TargetLibraryInfoImpl::isValidProto
>      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
>              FTy.getParamType(1)->isPointerTy());
>    case LibFunc::fscanf:
> +  case LibFunc::fiprintf:
>    case LibFunc::fprintf:
> -    return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
> +    return (NumParams >= 2 && FTy.getReturnType()->isIntegerTy() &&
> +            FTy.getParamType(0)->isPointerTy() &&
>              FTy.getParamType(1)->isPointerTy());
>    case LibFunc::fgetpos:
>      return (NumParams >= 2 && FTy.getParamType(0)->isPointerTy() &&
>              FTy.getParamType(1)->isPointerTy());
> -  case LibFunc::gets:
>    case LibFunc::getchar:
> +    return (NumParams == 0 && FTy.getReturnType()->isIntegerTy());
> +  case LibFunc::gets:
> +    return (NumParams == 1 && FTy.getParamType(0) == PCharTy);
>    case LibFunc::getitimer:
>      return (NumParams == 2 && FTy.getParamType(1)->isPointerTy());
>    case LibFunc::ungetc:
> @@ -853,9 +860,13 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::tmpfile:
>      return (FTy.getReturnType()->isPointerTy());
>    case LibFunc::htonl:
> -  case LibFunc::htons:
>    case LibFunc::ntohl:
> +    return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
> +            FTy.getReturnType() == FTy.getParamType(0));
> +  case LibFunc::htons:
>    case LibFunc::ntohs:
> +    return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(16) &&
> +            FTy.getReturnType() == FTy.getParamType(0));
>    case LibFunc::lstat:
>      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
>              FTy.getParamType(1)->isPointerTy());
> @@ -896,38 +907,144 @@ bool TargetLibraryInfoImpl::isValidProto
>      return (NumParams == 2 && FTy.getParamType(0)->isPointerTy() &&
>              FTy.getParamType(1)->isPointerTy());
>
> -  case LibFunc::Znwj:                    // new(unsigned int);
> -  case LibFunc::Znwm:                    // new(unsigned long);
> -  case LibFunc::Znaj:                    // new[](unsigned int);
> -  case LibFunc::Znam:                    // new[](unsigned long);
> -  case LibFunc::msvc_new_int:            // new(unsigned int);
> -  case LibFunc::msvc_new_longlong:       // new(unsigned long long);
> -  case LibFunc::msvc_new_array_int:      // new[](unsigned int);
> -  case LibFunc::msvc_new_array_longlong: // new[](unsigned long long);
> -    return (NumParams == 1);
> +  // new(unsigned int);
> +  case LibFunc::Znwj:
> +  // new(unsigned long);
> +  case LibFunc::Znwm:
> +  // new[](unsigned int);
> +  case LibFunc::Znaj:
> +  // new[](unsigned long);
> +  case LibFunc::Znam:
> +  // new(unsigned int);
> +  case LibFunc::msvc_new_int:
> +  // new(unsigned long long);
> +  case LibFunc::msvc_new_longlong:
> +  // new[](unsigned int);
> +  case LibFunc::msvc_new_array_int:
> +  // new[](unsigned long long);
> +  case LibFunc::msvc_new_array_longlong:
> +    return (NumParams == 1 && FTy.getReturnType()->isPointerTy());
> +
> +  // new(unsigned int, nothrow);
> +  case LibFunc::ZnwjRKSt9nothrow_t:
> +  // new(unsigned long, nothrow);
> +  case LibFunc::ZnwmRKSt9nothrow_t:
> +  // new[](unsigned int, nothrow);
> +  case LibFunc::ZnajRKSt9nothrow_t:
> +  // new[](unsigned long, nothrow);
> +  case LibFunc::ZnamRKSt9nothrow_t:
> +  // new(unsigned int, nothrow);
> +  case LibFunc::msvc_new_int_nothrow:
> +  // new(unsigned long long, nothrow);
> +  case LibFunc::msvc_new_longlong_nothrow:
> +  // new[](unsigned int, nothrow);
> +  case LibFunc::msvc_new_array_int_nothrow:
> +  // new[](unsigned long long, nothrow);
> +  case LibFunc::msvc_new_array_longlong_nothrow:
> +    return (NumParams == 2 && FTy.getReturnType()->isPointerTy());
> +
> +  // void operator delete[](void*);
> +  case LibFunc::ZdaPv:
> +  // void operator delete(void*);
> +  case LibFunc::ZdlPv:
> +  // void operator delete[](void*);
> +  case LibFunc::msvc_delete_array_ptr32:
> +  // void operator delete[](void*);
> +  case LibFunc::msvc_delete_array_ptr64:
> +  // void operator delete(void*);
> +  case LibFunc::msvc_delete_ptr32:
> +  // void operator delete(void*);
> +  case LibFunc::msvc_delete_ptr64:
> +    return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
> +
> +  // void operator delete[](void*, nothrow);
> +  case LibFunc::ZdaPvRKSt9nothrow_t:
> +  // void operator delete[](void*, unsigned int);
> +  case LibFunc::ZdaPvj:
> +  // void operator delete[](void*, unsigned long);
> +  case LibFunc::ZdaPvm:
> +  // void operator delete(void*, nothrow);
> +  case LibFunc::ZdlPvRKSt9nothrow_t:
> +  // void operator delete(void*, unsigned int);
> +  case LibFunc::ZdlPvj:
> +  // void operator delete(void*, unsigned long);
> +  case LibFunc::ZdlPvm:
> +  // void operator delete[](void*, unsigned int);
> +  case LibFunc::msvc_delete_array_ptr32_int:
> +  // void operator delete[](void*, nothrow);
> +  case LibFunc::msvc_delete_array_ptr32_nothrow:
> +  // void operator delete[](void*, unsigned long long);
> +  case LibFunc::msvc_delete_array_ptr64_longlong:
> +  // void operator delete[](void*, nothrow);
> +  case LibFunc::msvc_delete_array_ptr64_nothrow:
> +  // void operator delete(void*, unsigned int);
> +  case LibFunc::msvc_delete_ptr32_int:
> +  // void operator delete(void*, nothrow);
> +  case LibFunc::msvc_delete_ptr32_nothrow:
> +  // void operator delete(void*, unsigned long long);
> +  case LibFunc::msvc_delete_ptr64_longlong:
> +  // void operator delete(void*, nothrow);
> +  case LibFunc::msvc_delete_ptr64_nothrow:
> +    return (NumParams == 2 && FTy.getParamType(0)->isPointerTy());
>
>    case LibFunc::memset_pattern16:
>      return (!FTy.isVarArg() && NumParams == 3 &&
> -            isa<PointerType>(FTy.getParamType(0)) &&
> -            isa<PointerType>(FTy.getParamType(1)) &&
> -            isa<IntegerType>(FTy.getParamType(2)));
> +            FTy.getParamType(0)->isPointerTy() &&
> +            FTy.getParamType(1)->isPointerTy() &&
> +            FTy.getParamType(2)->isIntegerTy());
>
> -  // int __nvvm_reflect(const char *);
> +  case LibFunc::cxa_guard_abort:
> +  case LibFunc::cxa_guard_acquire:
> +  case LibFunc::cxa_guard_release:
>    case LibFunc::nvvm_reflect:
> -    return (NumParams == 1 && isa<PointerType>(FTy.getParamType(0)));
> +    return (NumParams == 1 && FTy.getParamType(0)->isPointerTy());
>
> +  case LibFunc::sincospi_stret:
> +  case LibFunc::sincospif_stret:
> +    return (NumParams == 1 && FTy.getParamType(0)->isFloatingPointTy());
> +
> +  case LibFunc::acos:
> +  case LibFunc::acosf:
> +  case LibFunc::acosh:
> +  case LibFunc::acoshf:
> +  case LibFunc::acoshl:
> +  case LibFunc::acosl:
> +  case LibFunc::asin:
> +  case LibFunc::asinf:
> +  case LibFunc::asinh:
> +  case LibFunc::asinhf:
> +  case LibFunc::asinhl:
> +  case LibFunc::asinl:
> +  case LibFunc::atan:
> +  case LibFunc::atanf:
> +  case LibFunc::atanh:
> +  case LibFunc::atanhf:
> +  case LibFunc::atanhl:
> +  case LibFunc::atanl:
> +  case LibFunc::cbrt:
> +  case LibFunc::cbrtf:
> +  case LibFunc::cbrtl:
>    case LibFunc::ceil:
>    case LibFunc::ceilf:
>    case LibFunc::ceill:
>    case LibFunc::cos:
>    case LibFunc::cosf:
> +  case LibFunc::cosh:
> +  case LibFunc::coshf:
> +  case LibFunc::coshl:
>    case LibFunc::cosl:
> +  case LibFunc::exp10:
> +  case LibFunc::exp10f:
> +  case LibFunc::exp10l:
>    case LibFunc::exp2:
>    case LibFunc::exp2f:
>    case LibFunc::exp2l:
>    case LibFunc::exp:
>    case LibFunc::expf:
>    case LibFunc::expl:
> +  case LibFunc::expm1:
> +  case LibFunc::expm1f:
> +  case LibFunc::expm1l:
>    case LibFunc::fabs:
>    case LibFunc::fabsf:
>    case LibFunc::fabsl:
> @@ -937,10 +1054,16 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::log10:
>    case LibFunc::log10f:
>    case LibFunc::log10l:
> +  case LibFunc::log1p:
> +  case LibFunc::log1pf:
> +  case LibFunc::log1pl:
>    case LibFunc::log2:
>    case LibFunc::log2f:
>    case LibFunc::log2l:
>    case LibFunc::log:
> +  case LibFunc::logb:
> +  case LibFunc::logbf:
> +  case LibFunc::logbl:
>    case LibFunc::logf:
>    case LibFunc::logl:
>    case LibFunc::nearbyint:
> @@ -954,12 +1077,21 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::roundl:
>    case LibFunc::sin:
>    case LibFunc::sinf:
> +  case LibFunc::sinh:
> +  case LibFunc::sinhf:
> +  case LibFunc::sinhl:
>    case LibFunc::sinl:
>    case LibFunc::sqrt:
> +  case LibFunc::sqrt_finite:
>    case LibFunc::sqrtf:
> +  case LibFunc::sqrtf_finite:
>    case LibFunc::sqrtl:
> +  case LibFunc::sqrtl_finite:
>    case LibFunc::tan:
>    case LibFunc::tanf:
> +  case LibFunc::tanh:
> +  case LibFunc::tanhf:
> +  case LibFunc::tanhl:
>    case LibFunc::tanl:
>    case LibFunc::trunc:
>    case LibFunc::truncf:
> @@ -967,12 +1099,18 @@ bool TargetLibraryInfoImpl::isValidProto
>      return (NumParams == 1 && FTy.getReturnType()->isFloatingPointTy() &&
>              FTy.getReturnType() == FTy.getParamType(0));
>
> +  case LibFunc::atan2:
> +  case LibFunc::atan2f:
> +  case LibFunc::atan2l:
>    case LibFunc::fmin:
>    case LibFunc::fminf:
>    case LibFunc::fminl:
>    case LibFunc::fmax:
>    case LibFunc::fmaxf:
>    case LibFunc::fmaxl:
> +  case LibFunc::fmod:
> +  case LibFunc::fmodf:
> +  case LibFunc::fmodl:
>    case LibFunc::copysign:
>    case LibFunc::copysignf:
>    case LibFunc::copysignl:
> @@ -983,6 +1121,13 @@ bool TargetLibraryInfoImpl::isValidProto
>              FTy.getReturnType() == FTy.getParamType(0) &&
>              FTy.getReturnType() == FTy.getParamType(1));
>
> +  case LibFunc::ldexp:
> +  case LibFunc::ldexpf:
> +  case LibFunc::ldexpl:
> +    return (NumParams == 2 && FTy.getReturnType()->isFloatingPointTy() &&
> +            FTy.getReturnType() == FTy.getParamType(0) &&
> +            FTy.getParamType(1)->isIntegerTy(32));
> +
>    case LibFunc::ffs:
>    case LibFunc::ffsl:
>    case LibFunc::ffsll:
> @@ -995,6 +1140,7 @@ bool TargetLibraryInfoImpl::isValidProto
>    case LibFunc::isdigit:
>    case LibFunc::isascii:
>    case LibFunc::toascii:
> +  case LibFunc::putchar:
>      return (NumParams == 1 && FTy.getReturnType()->isIntegerTy(32) &&
>              FTy.getReturnType() == FTy.getParamType(0));
>
> @@ -1020,11 +1166,20 @@ bool TargetLibraryInfoImpl::isValidProto
>      return (NumParams == 1 && FTy.getReturnType()->isFloatTy() &&
>              FTy.getReturnType() == FTy.getParamType(0));
>
> -  default:
> -    // Assume the other functions are correct.
> -    // FIXME: It'd be really nice to cover them all.
> -    return true;
> +  case LibFunc::strnlen:
> +    return (NumParams == 2 && FTy.getReturnType() == FTy.getParamType(1)
> &&
> +            FTy.getParamType(0) == PCharTy &&
> +            FTy.getParamType(1) == SizeTTy);
> +
> +  case LibFunc::posix_memalign:
> +    return (NumParams == 3 && FTy.getReturnType()->isIntegerTy(32) &&
> +            FTy.getParamType(0)->isPointerTy() &&
> +            FTy.getParamType(1) == SizeTTy && FTy.getParamType(2) ==
> SizeTTy);
> +
> +  case LibFunc::NumLibFuncs:
> +    llvm_unreachable("Invalid sentinel libfunc value");
>    }
> +
>  }
>
>  bool TargetLibraryInfoImpl::getLibFunc(const Function &FDecl,
>
> Modified: llvm/trunk/unittests/Analysis/CMakeLists.txt
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/
> Analysis/CMakeLists.txt?rev=292188&r1=292187&r2=292188&view=diff
> ============================================================
> ==================
> --- llvm/trunk/unittests/Analysis/CMakeLists.txt (original)
> +++ llvm/trunk/unittests/Analysis/CMakeLists.txt Mon Jan 16 21:10:02 2017
> @@ -18,6 +18,7 @@ add_llvm_unittest(AnalysisTests
>    ProfileSummaryInfoTest.cpp
>    ScalarEvolutionTest.cpp
>    TBAATest.cpp
> +  TargetLibraryInfoTest.cpp
>    UnrollAnalyzer.cpp
>    ValueTrackingTest.cpp
>    )
>
> Added: llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/Analysis/
> TargetLibraryInfoTest.cpp?rev=292188&view=auto
> ============================================================
> ==================
> --- llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp (added)
> +++ llvm/trunk/unittests/Analysis/TargetLibraryInfoTest.cpp Mon Jan 16
> 21:10:02 2017
> @@ -0,0 +1,481 @@
> +//===--- TargetLibraryInfoTest.cpp - TLI/LibFunc unit tests
> ---------------===//
> +//
> +//                     The LLVM Compiler Infrastructure
> +//
> +// This file is distributed under the University of Illinois Open Source
> +// License. See LICENSE.TXT for details.
> +//
> +//===------------------------------------------------------
> ----------------===//
> +
> +#include "llvm/Analysis/TargetLibraryInfo.h"
> +#include "llvm/AsmParser/Parser.h"
> +#include "llvm/IR/LLVMContext.h"
> +#include "llvm/IR/LegacyPassManager.h"
> +#include "llvm/IR/Module.h"
> +#include "llvm/Support/SourceMgr.h"
> +#include "gtest/gtest.h"
> +
> +using namespace llvm;
> +
> +namespace {
> +
> +class TargetLibraryInfoTest : public testing::Test {
> +protected:
> +  LLVMContext Context;
> +  TargetLibraryInfoImpl TLII;
> +  TargetLibraryInfo TLI;
> +
> +  std::unique_ptr<Module> M;
> +
> +  TargetLibraryInfoTest() : TLI(TLII) {}
> +
> +  void parseAssembly(const char *Assembly) {
> +    SMDiagnostic Error;
> +    M = parseAssemblyString(Assembly, Error, Context);
> +
> +    std::string errMsg;
> +    raw_string_ostream os(errMsg);
> +    Error.print("", os);
> +
> +    if (!M)
> +      report_fatal_error(os.str());
> +  }
> +
> +  ::testing::AssertionResult isLibFunc(const Function *FDecl,
> +                                       LibFunc::Func ExpectedLF) {
> +    StringRef ExpectedLFName = TLI.getName(ExpectedLF);
> +
> +    if (!FDecl)
> +      return ::testing::AssertionFailure() << ExpectedLFName << " not
> found";
> +
> +    LibFunc::Func F;
> +    if (!TLI.getLibFunc(*FDecl, F))
> +      return ::testing::AssertionFailure() << ExpectedLFName << "
> invalid";
> +
> +    return ::testing::AssertionSuccess() << ExpectedLFName << " is
> LibFunc";
> +  }
> +};
> +
> +} // end anonymous namespace
> +
> +// Check that we don't accept egregiously incorrect prototypes.
> +TEST_F(TargetLibraryInfoTest, InvalidProto) {
> +  parseAssembly("%foo = type { %foo }\n");
> +
> +  auto *StructTy = M->getTypeByName("foo");
> +  auto *InvalidFTy = FunctionType::get(StructTy, /*isVarArg=*/false);
> +
> +  for (unsigned FI = 0; FI != LibFunc::NumLibFuncs; ++FI) {
> +    LibFunc::Func LF = (LibFunc::Func)FI;
> +    auto *F = cast<Function>(
> +        M->getOrInsertFunction(TLI.getName(LF), InvalidFTy));
> +    EXPECT_FALSE(isLibFunc(F, LF));
> +  }
> +}
> +
> +// Check that we do accept know-correct prototypes.
> +TEST_F(TargetLibraryInfoTest, ValidProto) {
> +  parseAssembly(
> +    // These functions use a 64-bit size_t; use the appropriate
> datalayout.
> +    "target datalayout = \"p:64:64:64\"\n"
> +
> +    // Struct pointers are replaced with an opaque pointer.
> +    "%struct = type opaque\n"
> +
> +    // These functions were extracted as-is from the OS X headers.
> +    "declare double @__cospi(double)\n"
> +    "declare float @__cospif(float)\n"
> +    "declare { double, double } @__sincospi_stret(double)\n"
> +    "declare <2 x float> @__sincospif_stret(float)\n"
> +    "declare double @__sinpi(double)\n"
> +    "declare float @__sinpif(float)\n"
> +    "declare i32 @abs(i32)\n"
> +    "declare i32 @access(i8*, i32)\n"
> +    "declare double @acos(double)\n"
> +    "declare float @acosf(float)\n"
> +    "declare double @acosh(double)\n"
> +    "declare float @acoshf(float)\n"
> +    "declare x86_fp80 @acoshl(x86_fp80)\n"
> +    "declare x86_fp80 @acosl(x86_fp80)\n"
> +    "declare double @asin(double)\n"
> +    "declare float @asinf(float)\n"
> +    "declare double @asinh(double)\n"
> +    "declare float @asinhf(float)\n"
> +    "declare x86_fp80 @asinhl(x86_fp80)\n"
> +    "declare x86_fp80 @asinl(x86_fp80)\n"
> +    "declare double @atan(double)\n"
> +    "declare double @atan2(double, double)\n"
> +    "declare float @atan2f(float, float)\n"
> +    "declare x86_fp80 @atan2l(x86_fp80, x86_fp80)\n"
> +    "declare float @atanf(float)\n"
> +    "declare double @atanh(double)\n"
> +    "declare float @atanhf(float)\n"
> +    "declare x86_fp80 @atanhl(x86_fp80)\n"
> +    "declare x86_fp80 @atanl(x86_fp80)\n"
> +    "declare double @atof(i8*)\n"
> +    "declare i32 @atoi(i8*)\n"
> +    "declare i64 @atol(i8*)\n"
> +    "declare i64 @atoll(i8*)\n"
> +    "declare i32 @bcmp(i8*, i8*, i64)\n"
> +    "declare void @bcopy(i8*, i8*, i64)\n"
> +    "declare void @bzero(i8*, i64)\n"
> +    "declare i8* @calloc(i64, i64)\n"
> +    "declare double @cbrt(double)\n"
> +    "declare float @cbrtf(float)\n"
> +    "declare x86_fp80 @cbrtl(x86_fp80)\n"
> +    "declare double @ceil(double)\n"
> +    "declare float @ceilf(float)\n"
> +    "declare x86_fp80 @ceill(x86_fp80)\n"
> +    "declare i32 @chown(i8*, i32, i32)\n"
> +    "declare void @clearerr(%struct*)\n"
> +    "declare double @copysign(double, double)\n"
> +    "declare float @copysignf(float, float)\n"
> +    "declare x86_fp80 @copysignl(x86_fp80, x86_fp80)\n"
> +    "declare double @cos(double)\n"
> +    "declare float @cosf(float)\n"
> +    "declare double @cosh(double)\n"
> +    "declare float @coshf(float)\n"
> +    "declare x86_fp80 @coshl(x86_fp80)\n"
> +    "declare x86_fp80 @cosl(x86_fp80)\n"
> +    "declare i8* @ctermid(i8*)\n"
> +    "declare double @exp(double)\n"
> +    "declare double @exp2(double)\n"
> +    "declare float @exp2f(float)\n"
> +    "declare x86_fp80 @exp2l(x86_fp80)\n"
> +    "declare float @expf(float)\n"
> +    "declare x86_fp80 @expl(x86_fp80)\n"
> +    "declare double @expm1(double)\n"
> +    "declare float @expm1f(float)\n"
> +    "declare x86_fp80 @expm1l(x86_fp80)\n"
> +    "declare double @fabs(double)\n"
> +    "declare float @fabsf(float)\n"
> +    "declare x86_fp80 @fabsl(x86_fp80)\n"
> +    "declare i32 @fclose(%struct*)\n"
> +    "declare i32 @feof(%struct*)\n"
> +    "declare i32 @ferror(%struct*)\n"
> +    "declare i32 @fflush(%struct*)\n"
> +    "declare i32 @ffs(i32)\n"
> +    "declare i32 @ffsl(i64)\n"
> +    "declare i32 @ffsll(i64)\n"
> +    "declare i32 @fgetc(%struct*)\n"
> +    "declare i32 @fgetpos(%struct*, i64*)\n"
> +    "declare i8* @fgets(i8*, i32, %struct*)\n"
> +    "declare i32 @fileno(%struct*)\n"
> +    "declare void @flockfile(%struct*)\n"
> +    "declare double @floor(double)\n"
> +    "declare float @floorf(float)\n"
> +    "declare x86_fp80 @floorl(x86_fp80)\n"
> +    "declare i32 @fls(i32)\n"
> +    "declare i32 @flsl(i64)\n"
> +    "declare i32 @flsll(i64)\n"
> +    "declare double @fmax(double, double)\n"
> +    "declare float @fmaxf(float, float)\n"
> +    "declare x86_fp80 @fmaxl(x86_fp80, x86_fp80)\n"
> +    "declare double @fmin(double, double)\n"
> +    "declare float @fminf(float, float)\n"
> +    "declare x86_fp80 @fminl(x86_fp80, x86_fp80)\n"
> +    "declare double @fmod(double, double)\n"
> +    "declare float @fmodf(float, float)\n"
> +    "declare x86_fp80 @fmodl(x86_fp80, x86_fp80)\n"
> +    "declare i32 @fprintf(%struct*, i8*, ...)\n"
> +    "declare i32 @fputc(i32, %struct*)\n"
> +    "declare i64 @fread(i8*, i64, i64, %struct*)\n"
> +    "declare void @free(i8*)\n"
> +    "declare double @frexp(double, i32*)\n"
> +    "declare float @frexpf(float, i32*)\n"
> +    "declare x86_fp80 @frexpl(x86_fp80, i32*)\n"
> +    "declare i32 @fscanf(%struct*, i8*, ...)\n"
> +    "declare i32 @fseek(%struct*, i64, i32)\n"
> +    "declare i32 @fseeko(%struct*, i64, i32)\n"
> +    "declare i32 @fsetpos(%struct*, i64*)\n"
> +    "declare i32 @fstatvfs(i32, %struct*)\n"
> +    "declare i64 @ftell(%struct*)\n"
> +    "declare i64 @ftello(%struct*)\n"
> +    "declare i32 @ftrylockfile(%struct*)\n"
> +    "declare void @funlockfile(%struct*)\n"
> +    "declare i32 @getc(%struct*)\n"
> +    "declare i32 @getc_unlocked(%struct*)\n"
> +    "declare i32 @getchar()\n"
> +    "declare i8* @getenv(i8*)\n"
> +    "declare i32 @getitimer(i32, %struct*)\n"
> +    "declare i32 @getlogin_r(i8*, i64)\n"
> +    "declare %struct* @getpwnam(i8*)\n"
> +    "declare i8* @gets(i8*)\n"
> +    "declare i32 @gettimeofday(%struct*, i8*)\n"
> +    "declare i32 @_Z7isasciii(i32)\n"
> +    "declare i32 @_Z7isdigiti(i32)\n"
> +    "declare i64 @labs(i64)\n"
> +    "declare double @ldexp(double, i32)\n"
> +    "declare float @ldexpf(float, i32)\n"
> +    "declare x86_fp80 @ldexpl(x86_fp80, i32)\n"
> +    "declare i64 @llabs(i64)\n"
> +    "declare double @log(double)\n"
> +    "declare double @log10(double)\n"
> +    "declare float @log10f(float)\n"
> +    "declare x86_fp80 @log10l(x86_fp80)\n"
> +    "declare double @log1p(double)\n"
> +    "declare float @log1pf(float)\n"
> +    "declare x86_fp80 @log1pl(x86_fp80)\n"
> +    "declare double @log2(double)\n"
> +    "declare float @log2f(float)\n"
> +    "declare x86_fp80 @log2l(x86_fp80)\n"
> +    "declare double @logb(double)\n"
> +    "declare float @logbf(float)\n"
> +    "declare x86_fp80 @logbl(x86_fp80)\n"
> +    "declare float @logf(float)\n"
> +    "declare x86_fp80 @logl(x86_fp80)\n"
> +    "declare i8* @malloc(i64)\n"
> +    "declare i8* @memccpy(i8*, i8*, i32, i64)\n"
> +    "declare i8* @memchr(i8*, i32, i64)\n"
> +    "declare i32 @memcmp(i8*, i8*, i64)\n"
> +    "declare i8* @memcpy(i8*, i8*, i64)\n"
> +    "declare i8* @memmove(i8*, i8*, i64)\n"
> +    "declare i8* @memset(i8*, i32, i64)\n"
> +    "declare void @memset_pattern16(i8*, i8*, i64)\n"
> +    "declare i32 @mkdir(i8*, i16)\n"
> +    "declare double @modf(double, double*)\n"
> +    "declare float @modff(float, float*)\n"
> +    "declare x86_fp80 @modfl(x86_fp80, x86_fp80*)\n"
> +    "declare double @nearbyint(double)\n"
> +    "declare float @nearbyintf(float)\n"
> +    "declare x86_fp80 @nearbyintl(x86_fp80)\n"
> +    "declare i32 @pclose(%struct*)\n"
> +    "declare void @perror(i8*)\n"
> +    "declare i32 @posix_memalign(i8**, i64, i64)\n"
> +    "declare double @pow(double, double)\n"
> +    "declare float @powf(float, float)\n"
> +    "declare x86_fp80 @powl(x86_fp80, x86_fp80)\n"
> +    "declare i32 @printf(i8*, ...)\n"
> +    "declare i32 @putc(i32, %struct*)\n"
> +    "declare i32 @putchar(i32)\n"
> +    "declare i32 @puts(i8*)\n"
> +    "declare void @qsort(i8*, i64, i64, i32 (i8*, i8*)*)\n"
> +    "declare i64 @readlink(i8*, i8*, i64)\n"
> +    "declare i8* @realloc(i8*, i64)\n"
> +    "declare i8* @reallocf(i8*, i64)\n"
> +    "declare i32 @remove(i8*)\n"
> +    "declare i32 @rename(i8*, i8*)\n"
> +    "declare void @rewind(%struct*)\n"
> +    "declare double @rint(double)\n"
> +    "declare float @rintf(float)\n"
> +    "declare x86_fp80 @rintl(x86_fp80)\n"
> +    "declare i32 @rmdir(i8*)\n"
> +    "declare double @round(double)\n"
> +    "declare float @roundf(float)\n"
> +    "declare x86_fp80 @roundl(x86_fp80)\n"
> +    "declare i32 @scanf(i8*, ...)\n"
> +    "declare void @setbuf(%struct*, i8*)\n"
> +    "declare i32 @setitimer(i32, %struct*, %struct*)\n"
> +    "declare i32 @setvbuf(%struct*, i8*, i32, i64)\n"
> +    "declare double @sin(double)\n"
> +    "declare float @sinf(float)\n"
> +    "declare double @sinh(double)\n"
> +    "declare float @sinhf(float)\n"
> +    "declare x86_fp80 @sinhl(x86_fp80)\n"
> +    "declare x86_fp80 @sinl(x86_fp80)\n"
> +    "declare i32 @snprintf(i8*, i64, i8*, ...)\n"
> +    "declare i32 @sprintf(i8*, i8*, ...)\n"
> +    "declare double @sqrt(double)\n"
> +    "declare float @sqrtf(float)\n"
> +    "declare x86_fp80 @sqrtl(x86_fp80)\n"
> +    "declare i32 @sscanf(i8*, i8*, ...)\n"
> +    "declare i32 @statvfs(i8*, %struct*)\n"
> +    "declare i8* @stpcpy(i8*, i8*)\n"
> +    "declare i8* @stpncpy(i8*, i8*, i64)\n"
> +    "declare i32 @strcasecmp(i8*, i8*)\n"
> +    "declare i8* @strcat(i8*, i8*)\n"
> +    "declare i8* @strchr(i8*, i32)\n"
> +    "declare i32 @strcmp(i8*, i8*)\n"
> +    "declare i32 @strcoll(i8*, i8*)\n"
> +    "declare i8* @strcpy(i8*, i8*)\n"
> +    "declare i64 @strcspn(i8*, i8*)\n"
> +    "declare i8* @strdup(i8*)\n"
> +    "declare i64 @strlen(i8*)\n"
> +    "declare i32 @strncasecmp(i8*, i8*, i64)\n"
> +    "declare i8* @strncat(i8*, i8*, i64)\n"
> +    "declare i32 @strncmp(i8*, i8*, i64)\n"
> +    "declare i8* @strncpy(i8*, i8*, i64)\n"
> +    "declare i8* @strndup(i8*, i64)\n"
> +    "declare i64 @strnlen(i8*, i64)\n"
> +    "declare i8* @strpbrk(i8*, i8*)\n"
> +    "declare i8* @strrchr(i8*, i32)\n"
> +    "declare i64 @strspn(i8*, i8*)\n"
> +    "declare i8* @strstr(i8*, i8*)\n"
> +    "declare i8* @strtok(i8*, i8*)\n"
> +    "declare i8* @strtok_r(i8*, i8*, i8**)\n"
> +    "declare i64 @strtol(i8*, i8**, i32)\n"
> +    "declare x86_fp80 @strtold(i8*, i8**)\n"
> +    "declare i64 @strtoll(i8*, i8**, i32)\n"
> +    "declare i64 @strtoul(i8*, i8**, i32)\n"
> +    "declare i64 @strtoull(i8*, i8**, i32)\n"
> +    "declare i64 @strxfrm(i8*, i8*, i64)\n"
> +    "declare double @tan(double)\n"
> +    "declare float @tanf(float)\n"
> +    "declare double @tanh(double)\n"
> +    "declare float @tanhf(float)\n"
> +    "declare x86_fp80 @tanhl(x86_fp80)\n"
> +    "declare x86_fp80 @tanl(x86_fp80)\n"
> +    "declare i64 @times(%struct*)\n"
> +    "declare %struct* @tmpfile()\n"
> +    "declare i32 @_Z7toasciii(i32)\n"
> +    "declare double @trunc(double)\n"
> +    "declare float @truncf(float)\n"
> +    "declare x86_fp80 @truncl(x86_fp80)\n"
> +    "declare i32 @uname(%struct*)\n"
> +    "declare i32 @ungetc(i32, %struct*)\n"
> +    "declare i32 @unlink(i8*)\n"
> +    "declare i32 @utime(i8*, %struct*)\n"
> +    "declare i32 @utimes(i8*, %struct*)\n"
> +    "declare i8* @valloc(i64)\n"
> +    "declare i32 @vfprintf(%struct*, i8*, %struct*)\n"
> +    "declare i32 @vfscanf(%struct*, i8*, %struct*)\n"
> +    "declare i32 @vprintf(i8*, %struct*)\n"
> +    "declare i32 @vscanf(i8*, %struct*)\n"
> +    "declare i32 @vsnprintf(i8*, i64, i8*, %struct*)\n"
> +    "declare i32 @vsprintf(i8*, i8*, %struct*)\n"
> +    "declare i32 @vsscanf(i8*, i8*, %struct*)\n"
> +
> +    // These functions were also extracted from the OS X headers, but
> they are
> +    // available with a special name on darwin.
> +    // This test uses the default TLI name instead.
> +    "declare i32 @chmod(i8*, i16)\n"
> +    "declare i32 @closedir(%struct*)\n"
> +    "declare %struct* @fdopen(i32, i8*)\n"
> +    "declare %struct* @fopen(i8*, i8*)\n"
> +    "declare i32 @fputs(i8*, %struct*)\n"
> +    "declare i32 @fstat(i32, %struct*)\n"
> +    "declare i64 @fwrite(i8*, i64, i64, %struct*)\n"
> +    "declare i32 @lchown(i8*, i32, i32)\n"
> +    "declare i32 @lstat(i8*, %struct*)\n"
> +    "declare i64 @mktime(%struct*)\n"
> +    "declare i32 @open(i8*, i32, ...)\n"
> +    "declare %struct* @opendir(i8*)\n"
> +    "declare %struct* @popen(i8*, i8*)\n"
> +    "declare i64 @pread(i32, i8*, i64, i64)\n"
> +    "declare i64 @pwrite(i32, i8*, i64, i64)\n"
> +    "declare i64 @read(i32, i8*, i64)\n"
> +    "declare i8* @realpath(i8*, i8*)\n"
> +    "declare i32 @stat(i8*, %struct*)\n"
> +    "declare double @strtod(i8*, i8**)\n"
> +    "declare float @strtof(i8*, i8**)\n"
> +    "declare i32 @system(i8*)\n"
> +    "declare i32 @unsetenv(i8*)\n"
> +    "declare i64 @write(i32, i8*, i64)\n"
> +
> +    // These functions are available on Linux but not Darwin; they only
> differ
> +    // from their non-64 counterparts in the struct type.
> +    // Use the same prototype as the non-64 variant.
> +    "declare %struct* @fopen64(i8*, i8*)\n"
> +    "declare i32 @fstat64(i32, %struct*)\n"
> +    "declare i32 @fstatvfs64(i32, %struct*)\n"
> +    "declare i32 @lstat64(i8*, %struct*)\n"
> +    "declare i32 @open64(i8*, i32, ...)\n"
> +    "declare i32 @stat64(i8*, %struct*)\n"
> +    "declare i32 @statvfs64(i8*, %struct*)\n"
> +    "declare %struct* @tmpfile64()\n"
> +
> +    // These functions are also -64 variants, but do differ in the type
> of the
> +    // off_t (vs off64_t) parameter.  The non-64 variants declared above
> used
> +    // a 64-bit off_t, so, in practice, they are also equivalent.
> +    "declare i32 @fseeko64(%struct*, i64, i32)\n"
> +    "declare i64 @ftello64(%struct*)\n"
> +
> +    "declare void @_ZdaPv(i8*)\n"
> +    "declare void @_ZdaPvRKSt9nothrow_t(i8*, %struct*)\n"
> +    "declare void @_ZdaPvj(i8*, i32)\n"
> +    "declare void @_ZdaPvm(i8*, i64)\n"
> +    "declare void @_ZdlPv(i8*)\n"
> +    "declare void @_ZdlPvRKSt9nothrow_t(i8*, %struct*)\n"
> +    "declare void @_ZdlPvj(i8*, i32)\n"
> +    "declare void @_ZdlPvm(i8*, i64)\n"
> +    "declare i8* @_Znaj(i32)\n"
> +    "declare i8* @_ZnajRKSt9nothrow_t(i32, %struct*)\n"
> +    "declare i8* @_Znam(i64)\n"
> +    "declare i8* @_ZnamRKSt9nothrow_t(i64, %struct*)\n"
> +    "declare i8* @_Znwj(i32)\n"
> +    "declare i8* @_ZnwjRKSt9nothrow_t(i32, %struct*)\n"
> +    "declare i8* @_Znwm(i64)\n"
> +    "declare i8* @_ZnwmRKSt9nothrow_t(i64, %struct*)\n"
> +
> +    "declare void @\"??3 at YAXPEAX@Z\"(i8*)\n"
> +    "declare void @\"??3 at YAXPEAXAEBUnothrow_t@std@@@Z\"(i8*, %struct*)\n"
> +    "declare void @\"??3 at YAXPEAX_K@Z\"(i8*, i64)\n"
> +    "declare void @\"??_V at YAXPEAX@Z\"(i8*)\n"
> +    "declare void @\"??_V at YAXPEAXAEBUnothrow_t@std@@@Z\"(i8*,
> %struct*)\n"
> +    "declare void @\"??_V at YAXPEAX_K@Z\"(i8*, i64)\n"
> +    "declare i8* @\"??2 at YAPAXI@Z\"(i32)\n"
> +    "declare i8* @\"??2 at YAPAXIABUnothrow_t@std@@@Z\"(i32, %struct*)\n"
> +    "declare i8* @\"??2 at YAPEAX_K@Z\"(i64)\n"
> +    "declare i8* @\"??2 at YAPEAX_KAEBUnothrow_t@std@@@Z\"(i64, %struct*)\n"
> +    "declare i8* @\"??_U at YAPAXI@Z\"(i32)\n"
> +    "declare i8* @\"??_U at YAPAXIABUnothrow_t@std@@@Z\"(i32, %struct*)\n"
> +    "declare i8* @\"??_U at YAPEAX_K@Z\"(i64)\n"
> +    "declare i8* @\"??_U at YAPEAX_KAEBUnothrow_t@std@@@Z\"(i64,
> %struct*)\n"
> +
> +    "declare void @\"??3 at YAXPAX@Z\"(i8*)\n"
> +    "declare void @\"??3 at YAXPAXABUnothrow_t@std@@@Z\"(i8*, %struct*)\n"
> +    "declare void @\"??3 at YAXPAXI@Z\"(i8*, i32)\n"
> +    "declare void @\"??_V at YAXPAX@Z\"(i8*)\n"
> +    "declare void @\"??_V at YAXPAXABUnothrow_t@std@@@Z\"(i8*, %struct*)\n"
> +    "declare void @\"??_V at YAXPAXI@Z\"(i8*, i32)\n"
> +
> +    // These other functions were derived from the .def C declaration.
> +    "declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*)\n"
> +    "declare void @__cxa_guard_abort(%struct*)\n"
> +    "declare i32 @__cxa_guard_acquire(%struct*)\n"
> +    "declare void @__cxa_guard_release(%struct*)\n"
> +
> +    "declare i32 @__nvvm_reflect(i8*)\n"
> +
> +    "declare i8* @__memcpy_chk(i8*, i8*, i64, i64)\n"
> +    "declare i8* @__memmove_chk(i8*, i8*, i64, i64)\n"
> +    "declare i8* @__memset_chk(i8*, i32, i64, i64)\n"
> +    "declare i8* @__stpcpy_chk(i8*, i8*, i64)\n"
> +    "declare i8* @__stpncpy_chk(i8*, i8*, i64, i64)\n"
> +    "declare i8* @__strcpy_chk(i8*, i8*, i64)\n"
> +    "declare i8* @__strncpy_chk(i8*, i8*, i64, i64)\n"
> +
> +    "declare i8* @memalign(i64, i64)\n"
> +    "declare i8* @mempcpy(i8*, i8*, i64)\n"
> +    "declare i8* @memrchr(i8*, i32, i64)\n"
> +
> +    // These are similar to the FILE* fgetc/fputc.
> +    "declare i32 @_IO_getc(%struct*)\n"
> +    "declare i32 @_IO_putc(i32, %struct*)\n"
> +
> +    "declare i32 @__isoc99_scanf(i8*, ...)\n"
> +    "declare i32 @__isoc99_sscanf(i8*, i8*, ...)\n"
> +    "declare i8* @__strdup(i8*)\n"
> +    "declare i8* @__strndup(i8*, i64)\n"
> +    "declare i8* @__strtok_r(i8*, i8*, i8**)\n"
> +
> +    "declare double @__sqrt_finite(double)\n"
> +    "declare float @__sqrtf_finite(float)\n"
> +    "declare x86_fp80 @__sqrtl_finite(x86_fp80)\n"
> +    "declare double @exp10(double)\n"
> +    "declare float @exp10f(float)\n"
> +    "declare x86_fp80 @exp10l(x86_fp80)\n"
> +
> +    // These printf variants have the same prototype as the non-'i'
> versions.
> +    "declare i32 @fiprintf(%struct*, i8*, ...)\n"
> +    "declare i32 @iprintf(i8*, ...)\n"
> +    "declare i32 @siprintf(i8*, i8*, ...)\n"
> +
> +    "declare i32 @htonl(i32)\n"
> +    "declare i16 @htons(i16)\n"
> +    "declare i32 @ntohl(i32)\n"
> +    "declare i16 @ntohs(i16)\n"
> +
> +    "declare i32 @isascii(i32)\n"
> +    "declare i32 @isdigit(i32)\n"
> +    "declare i32 @toascii(i32)\n"
> +    );
> +
> +  for (unsigned FI = 0; FI != LibFunc::NumLibFuncs; ++FI) {
> +    LibFunc::Func LF = (LibFunc::Func)FI;
> +    // Make sure everything is available; we're not testing target
> defaults.
> +    TLII.setAvailable(LF);
> +    Function *F = M->getFunction(TLI.getName(LF));
> +    EXPECT_TRUE(isLibFunc(F, LF));
> +  }
> +}
>
>
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