# * Find the llvm/mlir libraries This module finds if llvm/mlir is installed, or build
#   llvm/mlir from source. This module sets the following variables.
#
# MLIR_LLVM_INCLUDE_DIR     - path to the LLVM/MLIR include files MLIR_LLVM_LIBS - path
# to the LLVM/MLIR libraries
#
# This module define the following functions.
#
# external_tablegen_library  - created interface library which depends on tablegen
# outputs

include(CMakeParseArguments)

function(external_tablegen_library)
  cmake_parse_arguments(_RULE "TESTONLY" "NAME;TBLGEN" "SRCS;INCLUDES;OUTS" ${ARGN})

  if(_RULE_TESTONLY AND NOT MGE_WITH_TEST)
    return()
  endif()

  set(_NAME ${_RULE_NAME})

  set(LLVM_TARGET_DEFINITIONS ${_RULE_SRCS})
  set(_INCLUDE_DIRS ${_RULE_INCLUDES})
  list(TRANSFORM _INCLUDE_DIRS PREPEND "-I")
  set(_OUTPUTS)
  while(_RULE_OUTS)
    list(GET _RULE_OUTS 0 _COMMAND)
    list(REMOVE_AT _RULE_OUTS 0)
    list(GET _RULE_OUTS 0 _FILE)
    list(REMOVE_AT _RULE_OUTS 0)
    tablegen(${_RULE_TBLGEN} ${_FILE} ${_COMMAND} ${_INCLUDE_DIRS})
    list(APPEND _OUTPUTS ${CMAKE_CURRENT_BINARY_DIR}/${_FILE})
  endwhile()
  add_custom_target(${_NAME}_target DEPENDS ${_OUTPUTS})

  add_library(${_NAME} INTERFACE)
  add_dependencies(${_NAME} ${_NAME}_target)

  target_include_directories(${_NAME} INTERFACE "$<BUILD_INTERFACE:${_RULE_INCLUDES}>")

  install(TARGETS ${_NAME} EXPORT ${MGE_EXPORT_TARGETS})
endfunction()

set(LLVM_LIBS
    LLVMCore
    LLVMSupport
    LLVMX86CodeGen
    LLVMOrcJIT
    LLVMNVPTXCodeGen
    LLVMNVPTXDesc
    LLVMNVPTXInfo)
set(MLIR_CORE_LIBS
    MLIRAnalysis
    MLIRExecutionEngine
    MLIRIR
    MLIRParser
    MLIRPass
    MLIRSideEffectInterfaces
    MLIRTransforms)
set(MLIR_DIALECT_LIBS
    MLIRAsync
    MLIRAVX512
    MLIRGPU
    MLIRLLVMAVX512
    MLIRNVVMIR
    MLIROpenACC
    MLIRPDL
    MLIRPDLInterp
    MLIRQuant
    MLIRROCDLIR
    MLIRSDBM
    MLIRShape
    MLIRSPIRV
    MLIRStandardOpsTransforms
    MLIRTosa)
set(MLIR_CONVERSION_LIBS
    MLIRAffineToStandard MLIRAVX512ToLLVM MLIRGPUToGPURuntimeTransforms
    MLIRGPUToNVVMTransforms MLIRSCFToStandard)
set(MLIR_TRANSLATION_LIBS MLIRTargetLLVMIR MLIRTargetNVVMIR)
set(MLIR_LIBS ${MLIR_CORE_LIBS} ${MLIR_DIALECT_LIBS} ${MLIR_CONVERSION_LIBS}
              ${MLIR_TRANSLATION_LIBS})
set(MLIR_LLVM_LIBS ${LLVM_LIBS} ${MLIR_LIBS})

function(add_mge_mlir_src_dep llvm_monorepo_path)
  set(_CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}")
  string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
  if(NOT uppercase_CMAKE_BUILD_TYPE MATCHES
     "^(DEBUG|RELEASE|RELWITHDEBINFO|MINSIZEREL)$")
    set(CMAKE_BUILD_TYPE "Debug")
  endif()
  set(_CMAKE_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})
  set(BUILD_SHARED_LIBS
      OFF
      CACHE BOOL "" FORCE)

  add_subdirectory("${llvm_monorepo_path}/llvm" ${LLVM_BUILD_DIR} EXCLUDE_FROM_ALL)

  # Reset CMAKE_BUILD_TYPE to its previous setting
  set(CMAKE_BUILD_TYPE
      "${_CMAKE_BUILD_TYPE}"
      CACHE STRING "Build type" FORCE)
  # Reset BUILD_SHARED_LIBS to its previous setting
  set(BUILD_SHARED_LIBS
      ${_CMAKE_BUILD_SHARED_LIBS}
      CACHE BOOL "Build shared libraries" FORCE)
endfunction()

# llvm build options
set(LLVM_INCLUDE_EXAMPLES
    OFF
    CACHE BOOL "" FORCE)
set(LLVM_INCLUDE_TESTS
    OFF
    CACHE BOOL "" FORCE)
set(LLVM_INCLUDE_DOCS
    OFF
    CACHE BOOL "" FORCE)
set(LLVM_ENABLE_BINDINGS
    OFF
    CACHE BOOL "" FORCE)
set(LLVM_INCLUDE_BENCHMARKS
    OFF
    CACHE BOOL "" FORCE)
set(LLVM_ENABLE_RTTI
    ${MGE_ENABLE_RTTI}
    CACHE BOOL "" FORCE)
set(LLVM_TARGETS_TO_BUILD
    "X86;NVPTX;AArch64;ARM"
    CACHE STRING "" FORCE)
set(LLVM_ENABLE_PROJECTS
    "mlir"
    CACHE STRING "" FORCE)
set(LLVM_BUILD_DIR ${PROJECT_BINARY_DIR}/third_party/llvm-project/llvm)

add_mge_mlir_src_dep("third_party/llvm-project")

set(MLIR_LLVM_INCLUDE_DIR
    ${PROJECT_SOURCE_DIR}/third_party/llvm-project/llvm/include
    ${PROJECT_BINARY_DIR}/third_party/llvm-project/llvm/include
    ${PROJECT_SOURCE_DIR}/third_party/llvm-project/mlir/include
    ${PROJECT_BINARY_DIR}/third_party/llvm-project/llvm/tools/mlir/include)
set(MLIR_TABLEGEN_EXE mlir-tblgen)