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//===--- NVPTX.h - Declare NVPTX target feature support ---------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file declares NVPTX TargetInfo objects.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_NVPTX_H
#define LLVM_CLANG_LIB_BASIC_TARGETS_NVPTX_H
#include "clang/Basic/Cuda.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/TargetOptions.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Compiler.h"
namespace clang {
namespace targets {
static const unsigned NVPTXAddrSpaceMap[] = {
0, // Default
1, // opencl_global
3, // opencl_local
4, // opencl_constant
0, // opencl_private
// FIXME: generic has to be added to the target
0, // opencl_generic
1, // cuda_device
4, // cuda_constant
3, // cuda_shared
};
/// The DWARF address class. Taken from
/// https://docs.nvidia.com/cuda/archive/10.0/ptx-writers-guide-to-interoperability/index.html#cuda-specific-dwarf
static const int NVPTXDWARFAddrSpaceMap[] = {
-1, // Default, opencl_private or opencl_generic - not defined
5, // opencl_global
-1,
8, // opencl_local or cuda_shared
4, // opencl_constant or cuda_constant
};
class LLVM_LIBRARY_VISIBILITY NVPTXTargetInfo : public TargetInfo {
static const char *const GCCRegNames[];
static const Builtin::Info BuiltinInfo[];
CudaArch GPU;
uint32_t PTXVersion;
std::unique_ptr<TargetInfo> HostTarget;
public:
NVPTXTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts,
unsigned TargetPointerWidth);
void getTargetDefines(const LangOptions &Opts,
MacroBuilder &Builder) const override;
ArrayRef<Builtin::Info> getTargetBuiltins() const override;
bool
initFeatureMap(llvm::StringMap<bool> &Features, DiagnosticsEngine &Diags,
StringRef CPU,
const std::vector<std::string> &FeaturesVec) const override {
Features[CudaArchToString(GPU)] = true;
Features["ptx" + std::to_string(PTXVersion)] = true;
return TargetInfo::initFeatureMap(Features, Diags, CPU, FeaturesVec);
}
bool hasFeature(StringRef Feature) const override;
ArrayRef<const char *> getGCCRegNames() const override;
ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {
// No aliases.
return None;
}
bool validateAsmConstraint(const char *&Name,
TargetInfo::ConstraintInfo &Info) const override {
switch (*Name) {
default:
return false;
case 'c':
case 'h':
case 'r':
case 'l':
case 'f':
case 'd':
Info.setAllowsRegister();
return true;
}
}
const char *getClobbers() const override {
// FIXME: Is this really right?
return "";
}
BuiltinVaListKind getBuiltinVaListKind() const override {
// FIXME: implement
return TargetInfo::CharPtrBuiltinVaList;
}
bool isValidCPUName(StringRef Name) const override {
return StringToCudaArch(Name) != CudaArch::UNKNOWN;
}
void fillValidCPUList(SmallVectorImpl<StringRef> &Values) const override {
for (int i = static_cast<int>(CudaArch::SM_20);
i < static_cast<int>(CudaArch::LAST); ++i)
Values.emplace_back(CudaArchToString(static_cast<CudaArch>(i)));
}
bool setCPU(const std::string &Name) override {
GPU = StringToCudaArch(Name);
return GPU != CudaArch::UNKNOWN;
}
void setSupportedOpenCLOpts() override {
auto &Opts = getSupportedOpenCLOpts();
Opts.support("cl_clang_storage_class_specifiers");
Opts.support("cl_khr_gl_sharing");
Opts.support("cl_khr_icd");
Opts.support("cl_khr_fp64");
Opts.support("cl_khr_byte_addressable_store");
Opts.support("cl_khr_global_int32_base_atomics");
Opts.support("cl_khr_global_int32_extended_atomics");
Opts.support("cl_khr_local_int32_base_atomics");
Opts.support("cl_khr_local_int32_extended_atomics");
}
/// \returns If a target requires an address within a target specific address
/// space \p AddressSpace to be converted in order to be used, then return the
/// corresponding target specific DWARF address space.
///
/// \returns Otherwise return None and no conversion will be emitted in the
/// DWARF.
Optional<unsigned>
getDWARFAddressSpace(unsigned AddressSpace) const override {
if (AddressSpace >= llvm::array_lengthof(NVPTXDWARFAddrSpaceMap) ||
NVPTXDWARFAddrSpaceMap[AddressSpace] < 0)
return llvm::None;
return NVPTXDWARFAddrSpaceMap[AddressSpace];
}
CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {
// CUDA compilations support all of the host's calling conventions.
//
// TODO: We should warn if you apply a non-default CC to anything other than
// a host function.
if (HostTarget)
return HostTarget->checkCallingConvention(CC);
return CCCR_Warning;
}
};
} // namespace targets
} // namespace clang
#endif // LLVM_CLANG_LIB_BASIC_TARGETS_NVPTX_H
|
