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//===--- Cuda.h - Cuda ToolChain Implementations ----------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_CUDA_H
#define LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_CUDA_H
#include "clang/Basic/Cuda.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Multilib.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/VersionTuple.h"
#include <bitset>
#include <set>
#include <vector>
namespace clang {
namespace driver {
/// A class to find a viable CUDA installation
class CudaInstallationDetector {
private:
const Driver &D;
bool IsValid = false;
CudaVersion Version = CudaVersion::UNKNOWN;
std::string InstallPath;
std::string BinPath;
std::string LibDevicePath;
std::string IncludePath;
llvm::StringMap<std::string> LibDeviceMap;
// CUDA architectures for which we have raised an error in
// CheckCudaVersionSupportsArch.
mutable std::bitset<(int)CudaArch::LAST> ArchsWithBadVersion;
public:
CudaInstallationDetector(const Driver &D, const llvm::Triple &HostTriple,
const llvm::opt::ArgList &Args);
void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const;
/// Emit an error if Version does not support the given Arch.
///
/// If either Version or Arch is unknown, does not emit an error. Emits at
/// most one error per Arch.
void CheckCudaVersionSupportsArch(CudaArch Arch) const;
/// Check whether we detected a valid Cuda install.
bool isValid() const { return IsValid; }
/// Print information about the detected CUDA installation.
void print(raw_ostream &OS) const;
/// Get the detected Cuda install's version.
CudaVersion version() const {
return Version == CudaVersion::NEW ? CudaVersion::PARTIALLY_SUPPORTED
: Version;
}
/// Get the detected Cuda installation path.
StringRef getInstallPath() const { return InstallPath; }
/// Get the detected path to Cuda's bin directory.
StringRef getBinPath() const { return BinPath; }
/// Get the detected Cuda Include path.
StringRef getIncludePath() const { return IncludePath; }
/// Get the detected Cuda device library path.
StringRef getLibDevicePath() const { return LibDevicePath; }
/// Get libdevice file for given architecture
std::string getLibDeviceFile(StringRef Gpu) const {
return LibDeviceMap.lookup(Gpu);
}
void WarnIfUnsupportedVersion();
};
namespace tools {
namespace NVPTX {
// Run ptxas, the NVPTX assembler.
class LLVM_LIBRARY_VISIBILITY Assembler : public Tool {
public:
Assembler(const ToolChain &TC) : Tool("NVPTX::Assembler", "ptxas", TC) {}
bool hasIntegratedCPP() const override { return false; }
void ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output, const InputInfoList &Inputs,
const llvm::opt::ArgList &TCArgs,
const char *LinkingOutput) const override;
};
// Runs fatbinary, which combines GPU object files ("cubin" files) and/or PTX
// assembly into a single output file.
class LLVM_LIBRARY_VISIBILITY FatBinary : public Tool {
public:
FatBinary(const ToolChain &TC) : Tool("NVPTX::Linker", "fatbinary", TC) {}
bool hasIntegratedCPP() const override { return false; }
void ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output, const InputInfoList &Inputs,
const llvm::opt::ArgList &TCArgs,
const char *LinkingOutput) const override;
};
// Runs nvlink, which links GPU object files ("cubin" files) into a single file.
class LLVM_LIBRARY_VISIBILITY Linker : public Tool {
public:
Linker(const ToolChain &TC) : Tool("NVPTX::Linker", "fatbinary", TC) {}
bool hasIntegratedCPP() const override { return false; }
void ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output, const InputInfoList &Inputs,
const llvm::opt::ArgList &TCArgs,
const char *LinkingOutput) const override;
};
void getNVPTXTargetFeatures(const Driver &D, const llvm::Triple &Triple,
const llvm::opt::ArgList &Args,
std::vector<StringRef> &Features);
} // end namespace NVPTX
} // end namespace tools
namespace toolchains {
class LLVM_LIBRARY_VISIBILITY NVPTXToolChain : public ToolChain {
public:
NVPTXToolChain(const Driver &D, const llvm::Triple &Triple,
const llvm::Triple &HostTriple,
const llvm::opt::ArgList &Args);
NVPTXToolChain(const Driver &D, const llvm::Triple &Triple,
const llvm::opt::ArgList &Args);
llvm::opt::DerivedArgList *
TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch,
Action::OffloadKind DeviceOffloadKind) const override;
// Never try to use the integrated assembler with CUDA; always fork out to
// ptxas.
bool useIntegratedAs() const override { return false; }
bool isCrossCompiling() const override { return true; }
bool isPICDefault() const override { return false; }
bool isPIEDefault(const llvm::opt::ArgList &Args) const override {
return false;
}
bool isPICDefaultForced() const override { return false; }
bool SupportsProfiling() const override { return false; }
bool IsMathErrnoDefault() const override { return false; }
bool supportsDebugInfoOption(const llvm::opt::Arg *A) const override;
void adjustDebugInfoKind(codegenoptions::DebugInfoKind &DebugInfoKind,
const llvm::opt::ArgList &Args) const override;
// NVPTX supports only DWARF2.
unsigned GetDefaultDwarfVersion() const override { return 2; }
unsigned getMaxDwarfVersion() const override { return 2; }
CudaInstallationDetector CudaInstallation;
protected:
Tool *buildAssembler() const override; // ptxas.
Tool *buildLinker() const override; // nvlink.
};
class LLVM_LIBRARY_VISIBILITY CudaToolChain : public NVPTXToolChain {
public:
CudaToolChain(const Driver &D, const llvm::Triple &Triple,
const ToolChain &HostTC, const llvm::opt::ArgList &Args);
const llvm::Triple *getAuxTriple() const override {
return &HostTC.getTriple();
}
std::string getInputFilename(const InputInfo &Input) const override;
llvm::opt::DerivedArgList *
TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch,
Action::OffloadKind DeviceOffloadKind) const override;
void
addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args,
Action::OffloadKind DeviceOffloadKind) const override;
llvm::DenormalMode getDefaultDenormalModeForType(
const llvm::opt::ArgList &DriverArgs, const JobAction &JA,
const llvm::fltSemantics *FPType = nullptr) const override;
void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const override;
void addClangWarningOptions(llvm::opt::ArgStringList &CC1Args) const override;
CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
void
AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const override;
void AddClangCXXStdlibIncludeArgs(
const llvm::opt::ArgList &Args,
llvm::opt::ArgStringList &CC1Args) const override;
void AddIAMCUIncludeArgs(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const override;
SanitizerMask getSupportedSanitizers() const override;
VersionTuple
computeMSVCVersion(const Driver *D,
const llvm::opt::ArgList &Args) const override;
const ToolChain &HostTC;
/// Uses nvptx-arch tool to get arch of the system GPU. Will return error
/// if unable to find one.
virtual Expected<SmallVector<std::string>>
getSystemGPUArchs(const llvm::opt::ArgList &Args) const override;
protected:
Tool *buildAssembler() const override; // ptxas
Tool *buildLinker() const override; // fatbinary (ok, not really a linker)
};
} // end namespace toolchains
} // end namespace driver
} // end namespace clang
#endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_CUDA_H
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