//===- LLVMSPIRVLib.h - Read and write SPIR-V binary ------------*- C++ -*-===//
//
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//===----------------------------------------------------------------------===//
/// \file LLVMSPIRVLib.h
///
/// This files declares functions and passes for translating between LLVM and
/// SPIR-V.
///
///
//===----------------------------------------------------------------------===//
#ifndef SPIRV_H
#define SPIRV_H

#include <iostream>
#include <string>

namespace llvm {
// Pass initialization functions need to be declared before inclusion of
// PassSupport.h.
class PassRegistry;
void initializeLLVMToSPIRVPass(PassRegistry &);
void initializeOCL20To12Pass(PassRegistry &);
void initializeOCL20ToSPIRVPass(PassRegistry &);
void initializeOCL21ToSPIRVPass(PassRegistry &);
void initializeOCLTypeToSPIRVPass(PassRegistry &);
void initializeSPIRVLowerBoolPass(PassRegistry &);
void initializeSPIRVLowerConstExprPass(PassRegistry &);
void initializeSPIRVLowerOCLBlocksPass(PassRegistry &);
void initializeSPIRVLowerMemmovePass(PassRegistry &);
void initializeSPIRVRegularizeLLVMPass(PassRegistry &);
void initializeSPIRVToOCL20Pass(PassRegistry &);
void initializeTransOCLMDPass(PassRegistry &);
} // namespace llvm

#include "llvm/IR/Module.h"

namespace SPIRV {
class SPIRVModule;

/// \brief Check if a string contains SPIR-V binary.
bool isSpirvBinary(std::string &Img);

#ifdef _SPIRV_SUPPORT_TEXT_FMT
/// \brief Convert SPIR-V between binary and internal textual formats.
/// This function is not thread safe and should not be used in multi-thread
/// applications unless guarded by a critical section.
/// \returns true if succeeds.
bool convertSpirv(std::istream &IS, llvm::raw_ostream &OS, std::string &ErrMsg,
                  bool FromText, bool ToText);

/// \brief Convert SPIR-V between binary and internel text formats.
/// This function is not thread safe and should not be used in multi-thread
/// applications unless guarded by a critical section.
bool convertSpirv(std::string &Input, std::string &Out, std::string &ErrMsg,
                  bool ToText);

/// \brief Check if a string contains SPIR-V in internal text format.
bool isSpirvText(std::string &Img);
#endif

} // End namespace SPIRV

namespace llvm {

/// \brief Translate LLVM module to SPIRV and write to ostream.
/// \returns true if succeeds.
bool writeSpirv(llvm::Module *M, llvm::raw_ostream &OS, std::string &ErrMsg);

/// \brief Load SPIRV from istream and translate to LLVM module.
/// \returns true if succeeds.
bool readSpirv(llvm::LLVMContext &C, std::istream &IS, llvm::Module *&M,
               std::string &ErrMsg);

/// \brief Regularize LLVM module by removing entities not representable by
/// SPIRV.
bool regularizeLlvmForSpirv(llvm::Module *M, std::string &ErrMsg);

/// \brief Mangle OpenCL builtin function function name.
void mangleOpenClBuiltin(const std::string &UnmangledName,
                         ArrayRef<Type *> ArgTypes, std::string &MangledName);

/// Create a pass for translating LLVM to SPIR-V.
ModulePass *createLLVMToSPIRV(SPIRV::SPIRVModule *);

/// Create a pass for translating OCL 2.0 builtin functions to equivalent
/// OCL 1.2 builtin functions.
ModulePass *createOCL20To12();

/// Create a pass for translating OCL 2.0 builtin functions to SPIR-V builtin
/// functions.
ModulePass *createOCL20ToSPIRV();

/// Create a pass for translating OCL 2.1 builtin functions to SPIR-V builtin
/// functions.
ModulePass *createOCL21ToSPIRV();

/// Create a pass for adapting OCL types for SPIRV.
ModulePass *createOCLTypeToSPIRV();

/// Create a pass for lowering cast instructions of i1 type.
ModulePass *createSPIRVLowerBool();

/// Create a pass for lowering constant expressions to instructions.
ModulePass *createSPIRVLowerConstExpr();

/// Create a pass for lowering OCL 2.0 blocks to functions calls.
ModulePass *createSPIRVLowerOCLBlocks();

/// Create a pass for lowering llvm.memmove to llvm.memcpys with a temporary
/// variable.
ModulePass *createSPIRVLowerMemmove();

/// Create a pass for regularize LLVM module to be translated to SPIR-V.
ModulePass *createSPIRVRegularizeLLVM();

/// Create a pass for translating SPIR-V builtin functions to OCL 2.0 builtin
/// functions.
ModulePass *createSPIRVToOCL20();

/// Create a pass for translating SPIR 1.2/2.0 metadata to SPIR-V friendly
/// metadata.
ModulePass *createTransOCLMD();

/// Create and return a pass that writes the module to the specified
/// ostream.
ModulePass *createSPIRVWriterPass(llvm::raw_ostream &Str);

} // namespace llvm

#endif // SPIRV_H