# Copyright 2023 The SwiftShader Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

%$%generated_file_comment

set(LLVM_DIR ${CMAKE_CURRENT_SOURCE_DIR}/llvm)
set(LLVM_CONFIG_DIR ${CMAKE_CURRENT_SOURCE_DIR}/configs)

set(LLVM_LIST
%$%files_llvm
)

if(ARCH STREQUAL "x86" OR ARCH STREQUAL "x86_64")
    list(APPEND LLVM_LIST
%$%files_x86
    )
elseif(ARCH STREQUAL "mipsel" OR ARCH STREQUAL "mips64el")
    list(APPEND LLVM_LIST
%$%files_Mips
    )
elseif(ARCH STREQUAL "aarch64")
    list(APPEND LLVM_LIST
%$%files_AArch64
    )
elseif(ARCH STREQUAL "arm")
    list(APPEND LLVM_LIST
%$%files_ARM
    )
elseif(ARCH STREQUAL "ppc64le")
    list(APPEND LLVM_LIST
%$%files_PowerPC
    )
elseif(ARCH STREQUAL "riscv64")
    list(APPEND LLVM_LIST
%$%files_RISCV
    )
endif()

if(REACTOR_EMIT_DEBUG_INFO)
    list(APPEND LLVM_LIST
        ${LLVM_DIR}/lib/Demangle/ItaniumDemangle.cpp
    )
endif()

set(LLVM_INCLUDE_DIR "")

if(WIN32)
    list(APPEND LLVM_INCLUDE_DIR ${LLVM_CONFIG_DIR}/windows/include)
elseif(LINUX)
    list(APPEND LLVM_INCLUDE_DIR ${LLVM_CONFIG_DIR}/linux/include)
    list(APPEND LIBBACKTRACE_INCLUDE_DIR ${LIBBACKTRACE_CONFIG_DIR}/linux/include)
elseif(APPLE)
    list(APPEND LLVM_INCLUDE_DIR ${LLVM_CONFIG_DIR}/darwin/include)
    list(APPEND LIBBACKTRACE_INCLUDE_DIR ${LIBBACKTRACE_CONFIG_DIR}/darwin/include)
elseif(ANDROID)
    list(APPEND LLVM_INCLUDE_DIR ${LLVM_CONFIG_DIR}/android/include)
    list(APPEND LIBBACKTRACE_INCLUDE_DIR ${LIBBACKTRACE_CONFIG_DIR}/android/include)
elseif(FUCHSIA)
    list(APPEND LLVM_INCLUDE_DIR ${LLVM_CONFIG_DIR}/fuchsia/include)
endif()

list(APPEND LLVM_INCLUDE_DIR
    ${LLVM_DIR}/include
    ${LLVM_DIR}/lib/Target/AArch64
    ${LLVM_DIR}/lib/Target/ARM
    ${LLVM_DIR}/lib/Target/Mips
    ${LLVM_DIR}/lib/Target/PowerPC
    ${LLVM_DIR}/lib/Target/RISCV
    ${LLVM_DIR}/lib/Target/X86
    ${LLVM_CONFIG_DIR}/common/include
    ${LLVM_CONFIG_DIR}/common/lib/IR
    ${LLVM_CONFIG_DIR}/common/lib/Target/AArch64
    ${LLVM_CONFIG_DIR}/common/lib/Target/ARM
    ${LLVM_CONFIG_DIR}/common/lib/Target/Mips
    ${LLVM_CONFIG_DIR}/common/lib/Target/PowerPC
    ${LLVM_CONFIG_DIR}/common/lib/Target/RISCV
    ${LLVM_CONFIG_DIR}/common/lib/Target/X86
    ${LLVM_CONFIG_DIR}/common/lib/Transforms/InstCombine
    ${LLVM_CONFIG_DIR}/common/lib/ExecutionEngine/JITLink
)

# Suppress known LLVM warnings
set(LLVM_COMPILE_OPTIONS "")

if(FUCHSIA)
    list(APPEND LLVM_COMPILE_OPTIONS
         "-Wno-cpp"   # Ignore #warning for unimplemented features in Process.inc.
    )
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
    list(APPEND LLVM_COMPILE_OPTIONS
         "-Wno-deprecated-declarations"
    )
elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
    list(APPEND LLVM_COMPILE_OPTIONS
        "-Wno-noexcept-type"           # mangled name for ‘X’ will change in C++17 because the exception specification is part of a function type
        "-Wno-maybe-uninitialized"     # ‘X’ may be used uninitialized in this function
        "-Wno-deprecated-declarations"
        "-Wno-missing-template-keyword"
        "-Wno-missing-braces"
    )
    if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 8)
        list(APPEND LLVM_COMPILE_OPTIONS
            "-Wno-class-memaccess"  # memset/memcmp used on non-trivial class object
            "-Wno-attributes"	# declared inline but not inline
        )
    endif()
    if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 9)
        list(APPEND LLVM_COMPILE_OPTIONS
            "-Wno-init-list-lifetime"  # assignment from temporary initializer_list does not extend the lifetime of the underlying array
        )
    endif()
elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
    list(APPEND LLVM_COMPILE_OPTIONS
        "/wd4141" # 'inline': used more than once
        "/wd4146" # unary minus operator applied to unsigned type, result still unsigned
        "/wd4244" # 'X': conversion from 'uint64_t' to 'const unsigned int', possible loss of data
        "/wd4267" # 'X': conversion from 'size_t' to 'unsigned int', possible loss of data
        "/wd4291" # 'void X new(size_t,unsigned int,unsigned int)': no matching operator delete found; memory will not be freed if initialization throws an exception
        "/wd4319" # 'X': zero extending 'unsigned int' to 'uint64_t' of greater size
        "/wd4624" # 'X': destructor was implicitly defined as deleted
        "/wd4805" # 'X': unsafe mix of type 'unsigned int' and type 'bool' in operation
        "/wd4996" # 'X': Call to 'Y' with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct.
    )
endif()

# Disable SIMD in Blake3
list(APPEND LLVM_COMPILE_OPTIONS
    "-DBLAKE3_NO_AVX512"
    "-DBLAKE3_NO_AVX2"
    "-DBLAKE3_NO_SSE41"
    "-DBLAKE3_NO_SSE2"
    "-DBLAKE3_USE_NEON=0"
)

add_library(llvm STATIC EXCLUDE_FROM_ALL ${LLVM_LIST})

set_target_properties(llvm PROPERTIES
    POSITION_INDEPENDENT_CODE 1
)

target_include_directories(llvm
    PUBLIC
        "${LLVM_INCLUDE_DIR}"
)

target_compile_options(llvm
    PUBLIC
        "${LLVM_COMPILE_OPTIONS}"
)

target_compile_definitions(llvm
    PUBLIC
        "__STDC_CONSTANT_MACROS"
        "__STDC_LIMIT_MACROS"
)

# Add required libraries for LLVM
if(LINUX OR APPLE)
    target_link_libraries(llvm dl)
endif()

if(SWIFTSHADER_EMIT_COVERAGE)
    # llvm-with-cov is an llvm target with additional coverage library
    # functionality. This is used to build 'turbo-cov', a custom and faster
    # reimplementation of llvm-cov.
    add_library(llvm-with-cov STATIC EXCLUDE_FROM_ALL
        ${LLVM_DIR}/lib/ProfileData/InstrProfReader.cpp
        ${LLVM_DIR}/lib/ProfileData/ProfileSummaryBuilder.cpp
        ${LLVM_DIR}/lib/ProfileData/Coverage/CoverageMapping.cpp
        ${LLVM_DIR}/lib/ProfileData/Coverage/CoverageMappingReader.cpp
        ${LLVM_DIR}/lib/Support/Compression.cpp
    )
    set_target_properties(llvm-with-cov PROPERTIES
        POSITION_INDEPENDENT_CODE 1
        FOLDER "LLVM"
    )

    target_include_directories(llvm-with-cov
        PUBLIC
            ${LLVM_INCLUDE_DIR}
    )

    target_compile_definitions(llvm-with-cov
        PUBLIC
            "__STDC_CONSTANT_MACROS"
            "__STDC_LIMIT_MACROS"
    )

    if(LINUX OR APPLE)
        target_link_libraries(llvm-with-cov llvm pthread)
    endif()
endif()