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//===--------------- BackendJob.swift - Swift Backend Job -------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
extension Driver {
/// Form a backend job.
mutating func backendJob(input: TypedVirtualPath,
baseInput: TypedVirtualPath?,
addJobOutputs: ([TypedVirtualPath]) -> Void)
throws -> Job {
var commandLine: [Job.ArgTemplate] = swiftCompilerPrefixArgs.map { Job.ArgTemplate.flag($0) }
var inputs = [TypedVirtualPath]()
var outputs = [TypedVirtualPath]()
commandLine.appendFlag("-frontend")
addCompileModeOption(outputType: compilerOutputType, commandLine: &commandLine)
// Add input arguments.
commandLine.appendFlag(.primaryFile)
commandLine.appendPath(input.file)
inputs.append(input)
commandLine.appendFlag(.embedBitcode)
// -embed-bitcode only supports a restricted set of flags.
commandLine.appendFlag(.target)
commandLine.appendFlag(targetTriple.triple)
// Enable address top-byte ignored in the ARM64 backend.
if targetTriple.arch == .aarch64 {
commandLine.appendFlag(.Xllvm)
commandLine.appendFlag("-aarch64-use-tbi")
}
// Handle the CPU and its preferences.
try commandLine.appendLast(.targetCpu, from: &parsedOptions)
// Enable optimizations, but disable all LLVM-IR-level transformations.
try commandLine.appendLast(in: .O, from: &parsedOptions)
commandLine.appendFlag(.disableLlvmOptzns)
try commandLine.appendLast(.parseStdlib, from: &parsedOptions)
commandLine.appendFlag(.moduleName)
commandLine.appendFlag(moduleOutputInfo.name)
// Add the output file argument if necessary.
if let compilerOutputType = compilerOutputType {
// If there is no baseInput (singleCompileMode), primary output computation
// is not input-specific, therefore it does not matter which input is passed.
let output = try computePrimaryOutput(for: baseInput ?? input,
outputType: compilerOutputType,
isTopLevel: isTopLevelOutput(type: compilerOutputType))
commandLine.appendFlag(.o)
commandLine.appendPath(output.file)
outputs.append(output)
}
addJobOutputs(outputs)
return Job(
moduleName: moduleOutputInfo.name,
kind: .backend,
tool: try toolchain.resolvedTool(.swiftCompiler),
commandLine: commandLine,
displayInputs: inputs,
inputs: inputs,
primaryInputs: [],
outputs: outputs
)
}
}
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