[SwiftCompiler] Move common bridging facilities to 'Basic'

A preparation for AST/DiagnosticEngine bridging

Author: rintaro

SwiftCompilerSources/CMakeLists.txt

@@ -6,7 +6,6 @@
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for Swift project authors
 
-
 # Following function are needed as a workaround until it's possible to compile
 # swift code with cmake's builtin swift support.
 
@@ -19,15 +18,9 @@ function(add_swift_compiler_module module)
   cmake_parse_arguments(ALSM
                         ""
                         ""
-                        "DEPENDS"
+                        "DEPENDS;SOURCES"
                         ${ARGN})
-  set(raw_sources ${ALSM_UNPARSED_ARGUMENTS})
-  set(sources)
-  foreach(raw_source ${raw_sources})
-    get_filename_component(
-      raw_source "${raw_source}" REALPATH BASE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
-    list(APPEND sources "${raw_source}")
-  endforeach()
+  set(raw_sources ${ALSM_SOURCES} ${ALSM_UNPARSED_ARGUMENTS})
 
   set(target_name "SwiftModule${module}")
 
@@ -36,9 +29,10 @@ function(add_swift_compiler_module module)
   # This target is mainly used to add properties, like the list of source files.
   add_custom_target(
       ${target_name}
-      SOURCES ${sources}
       COMMENT "swift compiler module ${module}")
 
+  swift_compiler_sources(${module} ${raw_sources})
+
   set_property(TARGET ${target_name} PROPERTY module_name ${module})
   set_property(TARGET ${target_name} PROPERTY module_depends ${ALSM_DEPENDS})
 
@@ -54,8 +48,13 @@ function(swift_compiler_sources module)
                         ""
                         ""
                         ${ARGN})
-  set(sources ${LSS_UNPARSED_ARGUMENTS})
-  list(TRANSFORM sources PREPEND "${CMAKE_CURRENT_SOURCE_DIR}/")
+  set(raw_sources ${LSS_UNPARSED_ARGUMENTS})
+  set(sources)
+  foreach(raw_source ${raw_sources})
+    get_filename_component(
+      raw_source "${raw_source}" REALPATH BASE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+    list(APPEND sources "${raw_source}")
+  endforeach()
 
   set(target_name "SwiftModule${module}")
   set_property(TARGET "SwiftModule${module}" APPEND PROPERTY SOURCES ${sources})
@@ -146,8 +145,11 @@ function(add_swift_compiler_modules_library name)
               "-emit-module-path" "${build_dir}/${module}.swiftmodule"
               "-parse-as-library" ${sources}
               "-wmo" ${swift_compile_options}
-              "-I" "${SWIFT_SOURCE_DIR}/include/swift"
-              "-I" "${SWIFT_SOURCE_DIR}/include"
+              # Bridging modules and headers.
+              "-Xcc" "-I" "-Xcc" "${SWIFT_SOURCE_DIR}/include"
+              # Generated C headers.
+              "-Xcc" "-I" "-Xcc" "${CMAKE_BINARY_DIR}/include"
+              # Generated swift modules.
               "-I" "${build_dir}"
       COMMENT "Building swift module ${module}")
 

SwiftCompilerSources/Sources/Basic/CMakeLists.txt

@@ -0,0 +1,10 @@
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2022 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See http://swift.org/LICENSE.txt for license information
+# See http://swift.org/CONTRIBUTORS.txt for Swift project authors
+
+add_swift_compiler_module(Basic
+  Utils.swift)

SwiftCompilerSources/Sources/Basic/Utils.swift

@@ -0,0 +1,77 @@
+//===--- Utils.swift - Some bridging utilities ----------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2022 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
+//
+//===----------------------------------------------------------------------===//
+
+@_exported import BasicBridging
+
+//===----------------------------------------------------------------------===//
+//                            Bridging Utilities
+//===----------------------------------------------------------------------===//
+
+extension BridgedStringRef {
+  public var string: String {
+    let buffer = UnsafeBufferPointer<UInt8>(start: data, count: Int(length))
+    return String(decoding: buffer, as: UTF8.self)
+  }
+
+  public func takeString() -> String {
+    let str = string
+    freeBridgedStringRef(self)
+    return str
+  }
+}
+
+extension String {
+  public func withBridgedStringRef<T>(_ c: (BridgedStringRef) -> T) -> T {
+    var str = self
+    return str.withUTF8 { buffer in
+      return c(BridgedStringRef(data: buffer.baseAddress, length: buffer.count))
+    }
+  }
+}
+
+extension Array {
+  public func withBridgedArrayRef<T>(_ c: (BridgedArrayRef) -> T) -> T {
+    return withUnsafeBytes { buf in
+      return c(BridgedArrayRef(data: buf.baseAddress!, numElements: count))
+    }
+  }
+}
+
+public typealias SwiftObject = UnsafeMutablePointer<BridgedSwiftObject>
+
+extension UnsafeMutablePointer where Pointee == BridgedSwiftObject {
+  public init<T: AnyObject>(_ object: T) {
+    let ptr = Unmanaged.passUnretained(object).toOpaque()
+    self = ptr.bindMemory(to: BridgedSwiftObject.self, capacity: 1)
+  }
+
+  public func getAs<T: AnyObject>(_ objectType: T.Type) -> T {
+    return Unmanaged<T>.fromOpaque(self).takeUnretainedValue()
+  }
+}
+
+extension Optional where Wrapped == UnsafeMutablePointer<BridgedSwiftObject> {
+  public func getAs<T: AnyObject>(_ objectType: T.Type) -> T? {
+    if let pointer = self {
+      return Unmanaged<T>.fromOpaque(pointer).takeUnretainedValue()
+    }
+    return nil
+  }
+}
+
+extension BridgedArrayRef {
+  public func withElements<T, R>(ofType ty: T.Type, _ c: (UnsafeBufferPointer<T>) -> R) -> R {
+    let start = data.bindMemory(to: ty, capacity: numElements);
+    let buffer = UnsafeBufferPointer(start: start, count: numElements);
+    return c(buffer)
+  }
+}

SwiftCompilerSources/Sources/CMakeLists.txt

@@ -6,6 +6,9 @@
 # See http://swift.org/LICENSE.txt for license information
 # See http://swift.org/CONTRIBUTORS.txt for Swift project authors
 
+# NOTE: Subdirectories must be added in dependency order.
+
+add_subdirectory(Basic)
 if(SWIFT_ENABLE_EXPERIMENTAL_STRING_PROCESSING)
   add_subdirectory(ExperimentalRegex)
 endif()

SwiftCompilerSources/Sources/Optimizer/CMakeLists.txt

@@ -7,7 +7,7 @@
 # See http://swift.org/CONTRIBUTORS.txt for Swift project authors
 
 set(dependencies)
-list(APPEND dependencies SIL)
+list(APPEND dependencies Basic SIL)
 if(SWIFT_ENABLE_EXPERIMENTAL_STRING_PROCESSING)
   list(APPEND dependencies ExperimentalRegex)
 endif()

SwiftCompilerSources/Sources/SIL/Argument.swift

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+import Basic
 import SILBridging
 
 /// A basic block argument.

SwiftCompilerSources/Sources/SIL/BasicBlock.swift

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+import Basic
 import SILBridging
 
 final public class BasicBlock : ListNode, CustomStringConvertible, HasName {

SwiftCompilerSources/Sources/SIL/Builder.swift

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+import Basic
 import SILBridging
 
 /// A utility to create new instructions at a given insertion point.

SwiftCompilerSources/Sources/SIL/CMakeLists.txt

@@ -7,20 +7,23 @@
 # See http://swift.org/CONTRIBUTORS.txt for Swift project authors
 
 add_swift_compiler_module(SIL
-  ApplySite.swift
-  Argument.swift
-  BasicBlock.swift
-  Builder.swift
-  Effects.swift
-  Function.swift
-  GlobalVariable.swift
-  Instruction.swift
-  Location.swift
-  Operand.swift
-  Registration.swift
-  SmallProjectionPath.swift
-  SubstitutionMap.swift
-  Type.swift
-  Utils.swift
-  Value.swift)
+  DEPENDS
+    Basic
+  SOURCES
+    ApplySite.swift
+    Argument.swift
+    BasicBlock.swift
+    Builder.swift
+    Effects.swift
+    Function.swift
+    GlobalVariable.swift
+    Instruction.swift
+    Location.swift
+    Operand.swift
+    Registration.swift
+    SmallProjectionPath.swift
+    SubstitutionMap.swift
+    Type.swift
+    Utils.swift
+    Value.swift)
 

SwiftCompilerSources/Sources/SIL/Function.swift

@@ -10,6 +10,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+import Basic
 import SILBridging
 
 final public class Function : CustomStringConvertible, HasName {