# Copyright 2018 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

declare_args() {
  # This directory contains the cipd packages for linux-x64, linux-arm64, and
  # mac-x64. Rather than using the prebuilts provided with the source tree, you
  # can download these individual packages from cipd and set this to the directory
  # containing those packages.
  llvm_prefix = "//prebuilt/third_party/llvm"
}

# Soft transition when rolling LLVM with API changes. Clients can use LLVM_USING_OLD_PREBUILT macro
# to detect the LLVM version.
#
# To enable during soft transitions , set the condition to true to enable the
# checking, and update the old_prebuilt_instance_ids to the old version you want
# to detect. Otherwise this condition should be false.
if (true) {
  prebuilt_cipd_version =
      read_file("${llvm_prefix}/${host_platform}/.versions/llvm.cipd_version",
                "json")
  prebuilt_instance_id = prebuilt_cipd_version.instance_id

  old_prebuilt_instance_ids = [
    "YLA3-L3DfwImnY-bZ1oAEl3B6anO5dz1LMhSsiF7l7UC",  # linux-amd64
    "ke6AnH4NtJ8SnhpX9sfCwGJKFFDCTNbaWJzLxOeCYkkC",  # linux-arm64
    "JhfSTBh7lzST9p5tPypiYKwYOfcbXnMFNA9jluclYoMC",  # mac-amd64
    "9g5EChWXrTRWNiVpKBRQ-mazvSkQ034yYONFQxdw_CgC",  # mac-arm64
  ]

  using_old_prebuilt = old_prebuilt_instance_ids + [ prebuilt_instance_id ] -
                       [ prebuilt_instance_id ] != old_prebuilt_instance_ids
} else {
  using_old_prebuilt = false
}

config("LLVM_config") {
  visibility = [ ":*" ]

  include_dirs = [ "${llvm_prefix}/${current_platform}/include" ]
  if (current_os == "linux") {
    libs = [ "${llvm_prefix}/${current_platform}/lib/libLLVM.so" ]
  } else if (current_os == "mac") {
    libs = [ "${llvm_prefix}/${current_platform}/lib/libLLVM.dylib" ]
  }

  if (using_old_prebuilt) {
    defines = [ "LLVM_USING_OLD_PREBUILT" ]
  }
}

# Shared library
group("LLVM") {
  public_configs = [ ":LLVM_config" ]
}

config("LLVMHeader_config") {
  # elflib depends on LLVM headers and is compiled on target. Since we don't have Fuchsia variant
  # of LLVM library yet, always use host_platform's include directory for now.
  # It should make no difference as headers are the same across different platforms.
  # Use -isystem instead of -I to suppress -Wconversion warnings in those headers.
  cflags = [ "-isystem" + rebase_path("${llvm_prefix}/${host_platform}/include",
                                      root_build_dir) ]

  if (using_old_prebuilt) {
    defines = [ "LLVM_USING_OLD_PREBUILT" ]
  }
}

template("llvm_library") {
  config(target_name + "_config") {
    visibility = [ ":*" ]
    libs = [ "${llvm_prefix}/${current_platform}/lib/lib${target_name}.a" ]
  }

  group(target_name) {
    forward_variables_from(invoker, [ "deps" ])
    public_configs = [
      ":LLVMHeader_config",
      ":${target_name}_config",
    ]

    # LLVM prebuilts are currently not built with RTTI, so if UBSan is enabled,
    # we should make sure RTTI vptr checks should not be done on these libraries
    # and anyone who depends on these libraries.
    # Note that this doesn't remove the rtti config (or the -frtti flag), but
    # this works because inherited configs will apply after the config set on the
    # target, so the last RTTI setting on the command line wins.
    public_configs += [ "//build/config:no_rtti" ]

    # ASan will report false positives for container overflow detection because
    # LLVM is prebuilt without ASan.
    if (!defined(deps)) {
      deps = []
    }
    deps += [
      "//build/config/sanitizers:suppress-asan-container-overflow",
      "//third_party/zlib:zlib_static",
      "//third_party/zstd:zstd",
    ]
  }
}

# The following dependency graph could be obtained by
# 1. Download llvm/utils/GenLibDeps.pl from LLVM codebase.
# 2. GenLibDeps.pl -flat prebuilt/third_party/llvm/lib | python3 convert_deps.py

# Sometimes when rolling, the dependency graph for the libraries changes. It
# then becomes necessary to check the `using_old_prebuilt` flag to soft
# transition the build graph.
#
# To update, copy all of the llvm_library instances below into an
# `if (using_old_prebuilt) { ... }` and an `else {...}` branch. Update the
# contents of the else branch to the if branch. Then make any necessary changes
# to the else branch for the new version.
llvm_library("LLVMAArch64Desc") {
  deps = [
    ":LLVMAArch64Info",
    ":LLVMAArch64Utils",
    ":LLVMBinaryFormat",
    ":LLVMMC",
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMAArch64Disassembler") {
  deps = [
    ":LLVMAArch64Desc",
    ":LLVMAArch64Info",
    ":LLVMAArch64Utils",
    ":LLVMMC",
    ":LLVMMCDisassembler",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMAArch64Info") {
  deps = [
    ":LLVMMC",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMAArch64Utils") {
  deps = [
    ":LLVMCore",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMAnalysis") {
  deps = [
    ":LLVMBinaryFormat",
    ":LLVMCore",
    ":LLVMObject",
    ":LLVMProfileData",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMAggressiveInstCombine") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMSupport",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMAsmParser") {
  deps = [
    ":LLVMBinaryFormat",
    ":LLVMCore",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMAsmPrinter") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMBinaryFormat",
    ":LLVMCodeGen",
    ":LLVMCore",
    ":LLVMDebugInfoCodeView",
    ":LLVMDebugInfoDWARF",
    ":LLVMDebugInfoMSF",
    ":LLVMMC",
    ":LLVMMCParser",
    ":LLVMRemarks",
    ":LLVMSupport",
    ":LLVMTarget",
  ]
}

llvm_library("LLVMBinaryFormat") {
  deps = [
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMBitReader") {
  deps = [
    ":LLVMBitstreamReader",
    ":LLVMCore",
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMBitWriter") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMMC",
    ":LLVMObject",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMBitstreamReader") {
  deps = [ ":LLVMSupport" ]
}

llvm_library("LLVMCodeGen") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMBitReader",
    ":LLVMBitWriter",
    ":LLVMCore",
    ":LLVMMC",
    ":LLVMProfileData",
    ":LLVMScalarOpts",
    ":LLVMSupport",
    ":LLVMTarget",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMCFGuard") {
  deps = [
    ":LLVMCore",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMCodeGenTypes") {
  deps = [ ":LLVMSupport" ]
}

llvm_library("LLVMCore") {
  deps = [
    ":LLVMBinaryFormat",
    ":LLVMDemangle",
    ":LLVMRemarks",
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMCoroutines") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMScalarOpts",
    ":LLVMSupport",
    ":LLVMTransformUtils",
    ":LLVMipo",
  ]
}

llvm_library("LLVMDebugInfoCodeView") {
  deps = [ ":LLVMSupport" ]
}

llvm_library("LLVMDebugInfoDWARF") {
  deps = [
    ":LLVMBinaryFormat",
    ":LLVMObject",
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMDebugInfoMSF") {
  deps = [ ":LLVMSupport" ]
}

llvm_library("LLVMDebugInfoPDB") {
  deps = [
    ":LLVMBinaryFormat",
    ":LLVMDebugInfoCodeView",
    ":LLVMDebugInfoMSF",
    ":LLVMObject",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMDemangle") {
  deps = []
}

llvm_library("LLVMExecutionEngine") {
  deps = [
    ":LLVMCore",
    ":LLVMMC",
    ":LLVMObject",
    ":LLVMOrcTargetProcess",
    ":LLVMRuntimeDyld",
    ":LLVMSupport",
    ":LLVMTarget",
  ]
}

llvm_library("LLVMFrontendOffloading") {
  deps = [
    ":LLVMCore",
    ":LLVMSupport",
    ":LLVMTargetParser",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMFrontendOpenMP") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMBitReader",
    ":LLVMCore",
    ":LLVMFrontendOffloading",
    ":LLVMMC",
    ":LLVMScalarOpts",
    ":LLVMSupport",
    ":LLVMTargetParser",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMGlobalISel") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCodeGen",
    ":LLVMCore",
    ":LLVMMC",
    ":LLVMSelectionDAG",
    ":LLVMSupport",
    ":LLVMTarget",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMHipStdPar") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMSupport",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMInstCombine") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMSupport",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMInstrumentation") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMDemangle",
    ":LLVMMC",
    ":LLVMProfileData",
    ":LLVMSupport",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMipo") {
  deps = [
    ":LLVMAggressiveInstCombine",
    ":LLVMAnalysis",
    ":LLVMBitReader",
    ":LLVMBitWriter",
    ":LLVMCore",
    ":LLVMFrontendOpenMP",
    ":LLVMIRReader",
    ":LLVMInstCombine",
    ":LLVMInstrumentation",
    ":LLVMLinker",
    ":LLVMObject",
    ":LLVMProfileData",
    ":LLVMScalarOpts",
    ":LLVMSupport",
    ":LLVMTransformUtils",
    ":LLVMVectorize",
  ]
}

llvm_library("LLVMIRPrinter") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMIRReader") {
  deps = [
    ":LLVMAsmParser",
    ":LLVMBitReader",
    ":LLVMCore",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMLinker") {
  deps = [
    ":LLVMCore",
    ":LLVMObject",
    ":LLVMSupport",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMMC") {
  deps = [
    ":LLVMBinaryFormat",
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMMCDisassembler") {
  deps = [
    ":LLVMMC",
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMMCJIT") {
  deps = [
    ":LLVMCore",
    ":LLVMExecutionEngine",
    ":LLVMObject",
    ":LLVMRuntimeDyld",
    ":LLVMSupport",
    ":LLVMTarget",
  ]
}

llvm_library("LLVMMCParser") {
  deps = [
    ":LLVMMC",
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMObjCARCOpts") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMSupport",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMObject") {
  deps = [
    ":LLVMBinaryFormat",
    ":LLVMBitReader",
    ":LLVMCore",
    ":LLVMIRReader",
    ":LLVMMC",
    ":LLVMMCParser",
    ":LLVMSupport",
    ":LLVMTargetParser",
    ":LLVMTextAPI",
  ]
}

llvm_library("LLVMOrcShared") {
  deps = [ ":LLVMSupport" ]
}

llvm_library("LLVMOrcTargetProcess") {
  deps = [
    ":LLVMOrcShared",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMPasses") {
  deps = [
    ":LLVMAggressiveInstCombine",
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMCoroutines",
    ":LLVMHipStdPar",
    ":LLVMInstCombine",
    ":LLVMInstrumentation",
    ":LLVMObjCARCOpts",
    ":LLVMScalarOpts",
    ":LLVMSupport",
    ":LLVMTarget",
    ":LLVMTransformUtils",
    ":LLVMVectorize",
    ":LLVMipo",
  ]
}

llvm_library("LLVMProfileData") {
  deps = [
    ":LLVMCore",
    ":LLVMDebugInfoDWARF",
    ":LLVMDemangle",
    ":LLVMObject",
    ":LLVMSupport",
    ":LLVMSymbolize",
  ]
}

if (using_old_prebuilt) {
  group("LLVMRISCVDesc") {
  }
  group("LLVMRISCVDisassembler") {
  }
  group("LLVMRISCVInfo") {
  }
} else {
  llvm_library("LLVMRISCVDesc") {
    deps = [
      ":LLVMMC",
      ":LLVMRISCVInfo",
      ":LLVMSupport",
      ":LLVMTargetParser",
    ]
  }

  llvm_library("LLVMRISCVDisassembler") {
    deps = [
      ":LLVMMC",
      ":LLVMMCDisassembler",
      ":LLVMRISCVDesc",
      ":LLVMRISCVInfo",
      ":LLVMSupport",
    ]
  }

  llvm_library("LLVMRISCVInfo") {
    deps = [
      ":LLVMMC",
      ":LLVMSupport",
    ]
  }
}

llvm_library("LLVMRemarks") {
  deps = [
    ":LLVMBitstreamReader",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMRuntimeDyld") {
  deps = [
    ":LLVMCore",
    ":LLVMMC",
    ":LLVMObject",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMScalarOpts") {
  deps = [
    ":LLVMAggressiveInstCombine",
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMInstCombine",
    ":LLVMSupport",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMSelectionDAG") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCodeGen",
    ":LLVMCore",
    ":LLVMMC",
    ":LLVMSupport",
    ":LLVMTarget",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMSupport") {
  deps = []
}

llvm_library("LLVMSymbolize") {
  deps = [
    ":LLVMDebugInfoDWARF",
    ":LLVMDebugInfoPDB",
    ":LLVMDemangle",
    ":LLVMObject",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMTarget") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMMC",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMTargetParser") {
  deps = [ ":LLVMSupport" ]
}

llvm_library("LLVMTextAPI") {
  deps = [
    ":LLVMSupport",
    ":LLVMTargetParser",
  ]
}

llvm_library("LLVMTransformUtils") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMSupport",
  ]
}

llvm_library("LLVMVectorize") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMCore",
    ":LLVMSupport",
    ":LLVMTransformUtils",
  ]
}

llvm_library("LLVMX86CodeGen") {
  deps = [
    ":LLVMAnalysis",
    ":LLVMAsmPrinter",
    ":LLVMCFGuard",
    ":LLVMCodeGen",
    ":LLVMCore",
    ":LLVMGlobalISel",
    ":LLVMInstrumentation",
    ":LLVMMC",
    ":LLVMProfileData",
    ":LLVMSelectionDAG",
    ":LLVMSupport",
    ":LLVMTarget",
    ":LLVMTransformUtils",
    ":LLVMX86Desc",
    ":LLVMX86Info",
  ]
}

llvm_library("LLVMX86Desc") {
  deps = [
    ":LLVMBinaryFormat",
    ":LLVMMC",
    ":LLVMMCDisassembler",
    ":LLVMSupport",
    ":LLVMTargetParser",
    ":LLVMX86Info",
  ]
}

llvm_library("LLVMX86Disassembler") {
  deps = [
    ":LLVMMCDisassembler",
    ":LLVMSupport",
    ":LLVMX86Info",
  ]
}

llvm_library("LLVMX86Info") {
  deps = [
    ":LLVMMC",
    ":LLVMSupport",
  ]
}