1 files changed, 217 insertions, 0 deletions
diff --git a/clang/lib/Basic/Targets/OSTargets.cpp b/clang/lib/Basic/Targets/OSTargets.cpp
new file mode 100644
index 000000000000..72fdb0e7dde8
--- /dev/null
+++ b/clang/lib/Basic/Targets/OSTargets.cpp
@@ -0,0 +1,217 @@
+//===--- OSTargets.cpp - Implement OS target feature support --------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements OS specific TargetInfo types.
+//===----------------------------------------------------------------------===//
+
+#include "OSTargets.h"
+#include "clang/Basic/MacroBuilder.h"
+#include "llvm/ADT/StringRef.h"
+
+using namespace clang;
+using namespace clang::targets;
+
+namespace clang {
+namespace targets {
+
+void getDarwinDefines(MacroBuilder &Builder, const LangOptions &Opts,
+                      const llvm::Triple &Triple, StringRef &PlatformName,
+                      VersionTuple &PlatformMinVersion) {
+  Builder.defineMacro("__APPLE_CC__", "6000");
+  Builder.defineMacro("__APPLE__");
+  Builder.defineMacro("__STDC_NO_THREADS__");
+  Builder.defineMacro("OBJC_NEW_PROPERTIES");
+  // AddressSanitizer doesn't play well with source fortification, which is on
+  // by default on Darwin.
+  if (Opts.Sanitize.has(SanitizerKind::Address))
+    Builder.defineMacro("_FORTIFY_SOURCE", "0");
+
+  // Darwin defines __weak, __strong, and __unsafe_unretained even in C mode.
+  if (!Opts.ObjC) {
+    // __weak is always defined, for use in blocks and with objc pointers.
+    Builder.defineMacro("__weak", "__attribute__((objc_gc(weak)))");
+    Builder.defineMacro("__strong", "");
+    Builder.defineMacro("__unsafe_unretained", "");
+  }
+
+  if (Opts.Static)
+    Builder.defineMacro("__STATIC__");
+  else
+    Builder.defineMacro("__DYNAMIC__");
+
+  if (Opts.POSIXThreads)
+    Builder.defineMacro("_REENTRANT");
+
+  // Get the platform type and version number from the triple.
+  unsigned Maj, Min, Rev;
+  if (Triple.isMacOSX()) {
+    Triple.getMacOSXVersion(Maj, Min, Rev);
+    PlatformName = "macos";
+  } else {
+    Triple.getOSVersion(Maj, Min, Rev);
+    PlatformName = llvm::Triple::getOSTypeName(Triple.getOS());
+  }
+
+  // If -target arch-pc-win32-macho option specified, we're
+  // generating code for Win32 ABI. No need to emit
+  // __ENVIRONMENT_XX_OS_VERSION_MIN_REQUIRED__.
+  if (PlatformName == "win32") {
+    PlatformMinVersion = VersionTuple(Maj, Min, Rev);
+    return;
+  }
+
+  // Set the appropriate OS version define.
+  if (Triple.isiOS()) {
+    assert(Maj < 100 && Min < 100 && Rev < 100 && "Invalid version!");
+    char Str[7];
+    if (Maj < 10) {
+      Str[0] = '0' + Maj;
+      Str[1] = '0' + (Min / 10);
+      Str[2] = '0' + (Min % 10);
+      Str[3] = '0' + (Rev / 10);
+      Str[4] = '0' + (Rev % 10);
+      Str[5] = '\0';
+    } else {
+      // Handle versions >= 10.
+      Str[0] = '0' + (Maj / 10);
+      Str[1] = '0' + (Maj % 10);
+      Str[2] = '0' + (Min / 10);
+      Str[3] = '0' + (Min % 10);
+      Str[4] = '0' + (Rev / 10);
+      Str[5] = '0' + (Rev % 10);
+      Str[6] = '\0';
+    }
+    if (Triple.isTvOS())
+      Builder.defineMacro("__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__", Str);
+    else
+      Builder.defineMacro("__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__",
+                          Str);
+
+  } else if (Triple.isWatchOS()) {
+    assert(Maj < 10 && Min < 100 && Rev < 100 && "Invalid version!");
+    char Str[6];
+    Str[0] = '0' + Maj;
+    Str[1] = '0' + (Min / 10);
+    Str[2] = '0' + (Min % 10);
+    Str[3] = '0' + (Rev / 10);
+    Str[4] = '0' + (Rev % 10);
+    Str[5] = '\0';
+    Builder.defineMacro("__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__", Str);
+  } else if (Triple.isMacOSX()) {
+    // Note that the Driver allows versions which aren't representable in the
+    // define (because we only get a single digit for the minor and micro
+    // revision numbers). So, we limit them to the maximum representable
+    // version.
+    assert(Maj < 100 && Min < 100 && Rev < 100 && "Invalid version!");
+    char Str[7];
+    if (Maj < 10 || (Maj == 10 && Min < 10)) {
+      Str[0] = '0' + (Maj / 10);
+      Str[1] = '0' + (Maj % 10);
+      Str[2] = '0' + std::min(Min, 9U);
+      Str[3] = '0' + std::min(Rev, 9U);
+      Str[4] = '\0';
+    } else {
+      // Handle versions > 10.9.
+      Str[0] = '0' + (Maj / 10);
+      Str[1] = '0' + (Maj % 10);
+      Str[2] = '0' + (Min / 10);
+      Str[3] = '0' + (Min % 10);
+      Str[4] = '0' + (Rev / 10);
+      Str[5] = '0' + (Rev % 10);
+      Str[6] = '\0';
+    }
+    Builder.defineMacro("__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__", Str);
+  }
+
+  // Tell users about the kernel if there is one.
+  if (Triple.isOSDarwin())
+    Builder.defineMacro("__MACH__");
+
+  PlatformMinVersion = VersionTuple(Maj, Min, Rev);
+}
+
+static void addMinGWDefines(const llvm::Triple &Triple, const LangOptions &Opts,
+                            MacroBuilder &Builder) {
+  DefineStd(Builder, "WIN32", Opts);
+  DefineStd(Builder, "WINNT", Opts);
+  if (Triple.isArch64Bit()) {
+    DefineStd(Builder, "WIN64", Opts);
+    Builder.defineMacro("__MINGW64__");
+  }
+  Builder.defineMacro("__MSVCRT__");
+  Builder.defineMacro("__MINGW32__");
+  addCygMingDefines(Opts, Builder);
+}
+
+static void addVisualCDefines(const LangOptions &Opts, MacroBuilder &Builder) {
+  if (Opts.CPlusPlus) {
+    if (Opts.RTTIData)
+      Builder.defineMacro("_CPPRTTI");
+
+    if (Opts.CXXExceptions)
+      Builder.defineMacro("_CPPUNWIND");
+  }
+
+  if (Opts.Bool)
+    Builder.defineMacro("__BOOL_DEFINED");
+
+  if (!Opts.CharIsSigned)
+    Builder.defineMacro("_CHAR_UNSIGNED");
+
+  // FIXME: POSIXThreads isn't exactly the option this should be defined for,
+  //        but it works for now.
+  if (Opts.POSIXThreads)
+    Builder.defineMacro("_MT");
+
+  if (Opts.MSCompatibilityVersion) {
+    Builder.defineMacro("_MSC_VER",
+                        Twine(Opts.MSCompatibilityVersion / 100000));
+    Builder.defineMacro("_MSC_FULL_VER", Twine(Opts.MSCompatibilityVersion));
+    // FIXME We cannot encode the revision information into 32-bits
+    Builder.defineMacro("_MSC_BUILD", Twine(1));
+
+    if (Opts.CPlusPlus11 && Opts.isCompatibleWithMSVC(LangOptions::MSVC2015))
+      Builder.defineMacro("_HAS_CHAR16_T_LANGUAGE_SUPPORT", Twine(1));
+
+    if (Opts.isCompatibleWithMSVC(LangOptions::MSVC2015)) {
+      if (Opts.CPlusPlus2a)
+        Builder.defineMacro("_MSVC_LANG", "201704L");
+      else if (Opts.CPlusPlus17)
+        Builder.defineMacro("_MSVC_LANG", "201703L");
+      else if (Opts.CPlusPlus14)
+        Builder.defineMacro("_MSVC_LANG", "201402L");
+    }
+  }
+
+  if (Opts.MicrosoftExt) {
+    Builder.defineMacro("_MSC_EXTENSIONS");
+
+    if (Opts.CPlusPlus11) {
+      Builder.defineMacro("_RVALUE_REFERENCES_V2_SUPPORTED");
+      Builder.defineMacro("_RVALUE_REFERENCES_SUPPORTED");
+      Builder.defineMacro("_NATIVE_NULLPTR_SUPPORTED");
+    }
+  }
+
+  Builder.defineMacro("_INTEGRAL_MAX_BITS", "64");
+}
+
+void addWindowsDefines(const llvm::Triple &Triple, const LangOptions &Opts,
+                       MacroBuilder &Builder) {
+  Builder.defineMacro("_WIN32");
+  if (Triple.isArch64Bit())
+    Builder.defineMacro("_WIN64");
+  if (Triple.isWindowsGNUEnvironment())
+    addMinGWDefines(Triple, Opts, Builder);
+  else if (Triple.isKnownWindowsMSVCEnvironment() ||
+           (Triple.isWindowsItaniumEnvironment() && Opts.MSVCCompat))
+    addVisualCDefines(Opts, Builder);
+}
+
+} // namespace targets
+} // namespace clang