//===--- SPIR.h - Declare SPIR and SPIR-V 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 SPIR and SPIR-V TargetInfo objects.

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_LIB_BASIC_TARGETS_SPIR_H

#define LLVM_CLANG_LIB_BASIC_TARGETS_SPIR_H

#include "Targets.h"

#include "clang/Basic/TargetInfo.h"

#include "clang/Basic/TargetOptions.h"

#include "llvm/Support/Compiler.h"

#include "llvm/TargetParser/Triple.h"

#include <optional>

namespace clang {

namespace targets {

// Used by both the SPIR and SPIR-V targets.

static const unsigned SPIRDefIsPrivMap[] = {

    0, // Default

    1, // opencl_global

    3, // opencl_local

    2, // opencl_constant

    0, // opencl_private

    4, // opencl_generic

    5, // opencl_global_device

    6, // opencl_global_host

    0, // cuda_device

    0, // cuda_constant

    0, // cuda_shared

    // SYCL address space values for this map are dummy

    0, // sycl_global

    0, // sycl_global_device

    0, // sycl_global_host

    0, // sycl_local

    0, // sycl_private

    0, // ptr32_sptr

    0, // ptr32_uptr

    0, // ptr64

    0, // hlsl_groupshared

    // Wasm address space values for this target are dummy values,

    // as it is only enabled for Wasm targets.

    20, // wasm_funcref

};

// Used by both the SPIR and SPIR-V targets.

static const unsigned SPIRDefIsGenMap[] = {

    4, // Default

    // OpenCL address space values for this map are dummy and they can't be used

    0, // opencl_global

    0, // opencl_local

    0, // opencl_constant

    0, // opencl_private

    0, // opencl_generic

    0, // opencl_global_device

    0, // opencl_global_host

    // cuda_* address space mapping is intended for HIPSPV (HIP to SPIR-V

    // translation). This mapping is enabled when the language mode is HIP.

    1, // cuda_device

    // cuda_constant pointer can be casted to default/"flat" pointer, but in

    // SPIR-V casts between constant and generic pointers are not allowed. For

    // this reason cuda_constant is mapped to SPIR-V CrossWorkgroup.

    1, // cuda_constant

    3, // cuda_shared

    1, // sycl_global

    5, // sycl_global_device

    6, // sycl_global_host

    3, // sycl_local

    0, // sycl_private

    0, // ptr32_sptr

    0, // ptr32_uptr

    0, // ptr64

    0, // hlsl_groupshared

    // Wasm address space values for this target are dummy values,

    // as it is only enabled for Wasm targets.

    20, // wasm_funcref

};

// Base class for SPIR and SPIR-V target info.

class LLVM_LIBRARY_VISIBILITY BaseSPIRTargetInfo : public TargetInfo {

  std::unique_ptr<TargetInfo> HostTarget;

protected:

  BaseSPIRTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)

      : TargetInfo(Triple) {

    assert((Triple.isSPIR() || Triple.isSPIRV()) &&

           "Invalid architecture for SPIR or SPIR-V.");

    assert(getTriple().getOS() == llvm::Triple::UnknownOS &&

           "SPIR(-V) target must use unknown OS");

    assert(getTriple().getEnvironment() == llvm::Triple::UnknownEnvironment &&

           "SPIR(-V) target must use unknown environment type");

    TLSSupported = false;

    VLASupported = false;

    LongWidth = LongAlign = 64;

    AddrSpaceMap = &SPIRDefIsPrivMap;

    UseAddrSpaceMapMangling = true;

    HasLegalHalfType = true;

    HasFloat16 = true;

    // Define available target features

    // These must be defined in sorted order!

    NoAsmVariants = true;

    llvm::Triple HostTriple(Opts.HostTriple);

    if (!HostTriple.isSPIR() && !HostTriple.isSPIRV() &&

        HostTriple.getArch() != llvm::Triple::UnknownArch) {

      HostTarget = AllocateTarget(llvm::Triple(Opts.HostTriple), Opts);

      // Copy properties from host target.

      BoolWidth = HostTarget->getBoolWidth();

      BoolAlign = HostTarget->getBoolAlign();

      IntWidth = HostTarget->getIntWidth();

      IntAlign = HostTarget->getIntAlign();

      HalfWidth = HostTarget->getHalfWidth();

      HalfAlign = HostTarget->getHalfAlign();

      FloatWidth = HostTarget->getFloatWidth();

      FloatAlign = HostTarget->getFloatAlign();

      DoubleWidth = HostTarget->getDoubleWidth();

      DoubleAlign = HostTarget->getDoubleAlign();

      LongWidth = HostTarget->getLongWidth();

      LongAlign = HostTarget->getLongAlign();

      LongLongWidth = HostTarget->getLongLongWidth();

      LongLongAlign = HostTarget->getLongLongAlign();

      MinGlobalAlign = HostTarget->getMinGlobalAlign(/* TypeSize = */ 0);

      NewAlign = HostTarget->getNewAlign();

      DefaultAlignForAttributeAligned =

          HostTarget->getDefaultAlignForAttributeAligned();

      IntMaxType = HostTarget->getIntMaxType();

      WCharType = HostTarget->getWCharType();

      WIntType = HostTarget->getWIntType();

      Char16Type = HostTarget->getChar16Type();

      Char32Type = HostTarget->getChar32Type();

      Int64Type = HostTarget->getInt64Type();

      SigAtomicType = HostTarget->getSigAtomicType();

      ProcessIDType = HostTarget->getProcessIDType();

      UseBitFieldTypeAlignment = HostTarget->useBitFieldTypeAlignment();

      UseZeroLengthBitfieldAlignment =

          HostTarget->useZeroLengthBitfieldAlignment();

      UseExplicitBitFieldAlignment = HostTarget->useExplicitBitFieldAlignment();

      ZeroLengthBitfieldBoundary = HostTarget->getZeroLengthBitfieldBoundary();

      // This is a bit of a lie, but it controls __GCC_ATOMIC_XXX_LOCK_FREE, and

      // we need those macros to be identical on host and device, because (among

      // other things) they affect which standard library classes are defined,

      // and we need all classes to be defined on both the host and device.

      MaxAtomicInlineWidth = HostTarget->getMaxAtomicInlineWidth();

    }

  }

public:

  // SPIR supports the half type and the only llvm intrinsic allowed in SPIR is

  // memcpy as per section 3 of the SPIR spec.

  bool useFP16ConversionIntrinsics() const override { return false; }

  ArrayRef<Builtin::Info> getTargetBuiltins() const override {

    return std::nullopt;

  }

  std::string_view getClobbers() const override { return ""; }

  ArrayRef<const char *> getGCCRegNames() const override {

    return std::nullopt;

  }

  bool validateAsmConstraint(const char *&Name,

                             TargetInfo::ConstraintInfo &info) const override {

    return true;

  }

  ArrayRef<TargetInfo::GCCRegAlias> getGCCRegAliases() const override {

    return std::nullopt;

  }

  BuiltinVaListKind getBuiltinVaListKind() const override {

    return TargetInfo::VoidPtrBuiltinVaList;

  }

  std::optional<unsigned>

  getDWARFAddressSpace(unsigned AddressSpace) const override {

    return AddressSpace;

  }

  CallingConvCheckResult checkCallingConvention(CallingConv CC) const override {

    return (CC == CC_SpirFunction || CC == CC_OpenCLKernel) ? CCCR_OK

                                                            : CCCR_Warning;

  }

  CallingConv getDefaultCallingConv() const override {

    return CC_SpirFunction;

  }

  void setAddressSpaceMap(bool DefaultIsGeneric) {

    AddrSpaceMap = DefaultIsGeneric ? 
&SPIRDefIsGenMap62
 : 
&SPIRDefIsPrivMap592
;

  }

  void adjust(DiagnosticsEngine &Diags, LangOptions &Opts) override {

    TargetInfo::adjust(Diags, Opts);

    // FIXME: SYCL specification considers unannotated pointers and references

    // to be pointing to the generic address space. See section 5.9.3 of

    // SYCL 2020 specification.

    // Currently, there is no way of representing SYCL's and HIP/CUDA's default

    // address space language semantic along with the semantics of embedded C's

    // default address space in the same address space map. Hence the map needs

    // to be reset to allow mapping to the desired value of 'Default' entry for

    // SYCL and HIP/CUDA.

    setAddressSpaceMap(

        /*DefaultIsGeneric=*/Opts.SYCLIsDevice ||

        // The address mapping from HIP/CUDA language for device code is only

        // defined for SPIR-V.

        
(620
getTriple().isSPIRV()620
 && 
Opts.CUDAIsDevice44
));

  }

  void setSupportedOpenCLOpts() override {

    // Assume all OpenCL extensions and optional core features are supported

    // for SPIR and SPIR-V since they are generic targets.

    supportAllOpenCLOpts();

  }

  bool hasBitIntType() const override { return true; }

  bool hasInt128Type() const override { return false; }

};

class LLVM_LIBRARY_VISIBILITY SPIRTargetInfo : public BaseSPIRTargetInfo {

public:

  SPIRTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)

      : BaseSPIRTargetInfo(Triple, Opts) {

    assert(Triple.isSPIR() && "Invalid architecture for SPIR.");

    assert(getTriple().getOS() == llvm::Triple::UnknownOS &&

           "SPIR target must use unknown OS");

    assert(getTriple().getEnvironment() == llvm::Triple::UnknownEnvironment &&

           "SPIR target must use unknown environment type");

  }

  void getTargetDefines(const LangOptions &Opts,

                        MacroBuilder &Builder) const override;

  bool hasFeature(StringRef Feature) const override {

    return Feature == "spir";

  }

  bool checkArithmeticFenceSupported() const override { return true; }

};

class LLVM_LIBRARY_VISIBILITY SPIR32TargetInfo : public SPIRTargetInfo {

public:

  SPIR32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)

      : SPIRTargetInfo(Triple, Opts) {

    assert(Triple.getArch() == llvm::Triple::spir &&

           "Invalid architecture for 32-bit SPIR.");

    PointerWidth = PointerAlign = 32;

    SizeType = TargetInfo::UnsignedInt;

    PtrDiffType = IntPtrType = TargetInfo::SignedInt;

    resetDataLayout("e-p:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-"

                    "v96:128-v192:256-v256:256-v512:512-v1024:1024");

  }

  void getTargetDefines(const LangOptions &Opts,

                        MacroBuilder &Builder) const override;

};

class LLVM_LIBRARY_VISIBILITY SPIR64TargetInfo : public SPIRTargetInfo {

public:

  SPIR64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)

      : SPIRTargetInfo(Triple, Opts) {

    assert(Triple.getArch() == llvm::Triple::spir64 &&

           "Invalid architecture for 64-bit SPIR.");

    PointerWidth = PointerAlign = 64;

    SizeType = TargetInfo::UnsignedLong;

    PtrDiffType = IntPtrType = TargetInfo::SignedLong;

    resetDataLayout("e-i64:64-v16:16-v24:32-v32:32-v48:64-"

                    "v96:128-v192:256-v256:256-v512:512-v1024:1024");

  }

  void getTargetDefines(const LangOptions &Opts,

                        MacroBuilder &Builder) const override;

};

class LLVM_LIBRARY_VISIBILITY SPIRVTargetInfo : public BaseSPIRTargetInfo {

public:

  SPIRVTargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)

      : BaseSPIRTargetInfo(Triple, Opts) {

    assert(Triple.isSPIRV() && "Invalid architecture for SPIR-V.");

    assert(getTriple().getOS() == llvm::Triple::UnknownOS &&

           "SPIR-V target must use unknown OS");

    assert(getTriple().getEnvironment() == llvm::Triple::UnknownEnvironment &&

           "SPIR-V target must use unknown environment type");

  }

  void getTargetDefines(const LangOptions &Opts,

                        MacroBuilder &Builder) const override;

  bool hasFeature(StringRef Feature) const override {

    return Feature == "spirv";

  }

};

class LLVM_LIBRARY_VISIBILITY SPIRV32TargetInfo : public SPIRVTargetInfo {

public:

  SPIRV32TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)

      : SPIRVTargetInfo(Triple, Opts) {

    assert(Triple.getArch() == llvm::Triple::spirv32 &&

           "Invalid architecture for 32-bit SPIR-V.");

    PointerWidth = PointerAlign = 32;

    SizeType = TargetInfo::UnsignedInt;

    PtrDiffType = IntPtrType = TargetInfo::SignedInt;

    resetDataLayout("e-p:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-"

                    "v96:128-v192:256-v256:256-v512:512-v1024:1024");

  }

  void getTargetDefines(const LangOptions &Opts,

                        MacroBuilder &Builder) const override;

};

class LLVM_LIBRARY_VISIBILITY SPIRV64TargetInfo : public SPIRVTargetInfo {

public:

  SPIRV64TargetInfo(const llvm::Triple &Triple, const TargetOptions &Opts)

      : SPIRVTargetInfo(Triple, Opts) {

    assert(Triple.getArch() == llvm::Triple::spirv64 &&

           "Invalid architecture for 64-bit SPIR-V.");

    PointerWidth = PointerAlign = 64;

    SizeType = TargetInfo::UnsignedLong;

    PtrDiffType = IntPtrType = TargetInfo::SignedLong;

    resetDataLayout("e-i64:64-v16:16-v24:32-v32:32-v48:64-"

                    "v96:128-v192:256-v256:256-v512:512-v1024:1024");

  }

  void getTargetDefines(const LangOptions &Opts,

                        MacroBuilder &Builder) const override;

};

} // namespace targets

} // namespace clang

#endif // LLVM_CLANG_LIB_BASIC_TARGETS_SPIR_H