Support tvOS and watchOS availability attributes

llvm-svn: 251711

clang/include/clang/Basic/Attr.td

@@ -456,8 +456,12 @@ def Availability : InheritableAttr {
              .Case("android", "Android")
              .Case("ios", "iOS")
              .Case("macosx", "OS X")
+             .Case("tvos", "tvOS")
+             .Case("watchos", "watchOS")
              .Case("ios_app_extension", "iOS (App Extension)")
              .Case("macosx_app_extension", "OS X (App Extension)")
+             .Case("tvos_app_extension", "tvOS (App Extension)")
+             .Case("watchos_app_extension", "watchOS (App Extension)")
              .Default(llvm::StringRef());
 } }];
   let HasCustomParsing = 1;

clang/include/clang/Basic/AttrDocs.td

@@ -580,6 +580,14 @@ are:
   Apple's Mac OS X operating system.  The minimum deployment target is
   specified by the ``-mmacosx-version-min=*version*`` command-line argument.
 
+``tvos``
+  Apple's tvOS operating system.  The minimum deployment target is specified by
+  the ``-mtvos-version-min=*version*`` command-line argument.
+
+``watchos``
+  Apple's watchOS operating system.  The minimum deployment target is specified by
+  the ``-mwatchos-version-min=*version*`` command-line argument.
+
 A declaration can be used even when deploying back to a platform version prior
 to when the declaration was introduced.  When this happens, the declaration is
 `weakly linked

clang/lib/Lex/PPMacroExpansion.cpp

@@ -1062,6 +1062,8 @@ static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
       .Case("attribute_availability_with_message", true)
       .Case("attribute_availability_app_extension", true)
       .Case("attribute_availability_with_version_underscores", true)
+      .Case("attribute_availability_tvos", true)
+      .Case("attribute_availability_watchos", true)
       .Case("attribute_cf_returns_not_retained", true)
       .Case("attribute_cf_returns_retained", true)
       .Case("attribute_cf_returns_on_parameters", true)

clang/lib/Sema/SemaDeclAttr.cpp

@@ -1863,6 +1863,22 @@ AvailabilityAttr *Sema::mergeAvailabilityAttr(NamedDecl *D, SourceRange Range,
         continue;
       }
 
+      // If there is an existing availability attribute for this platform that
+      // is explicit and the new one is implicit use the explicit one and
+      // discard the new implicit attribute.
+      if (OldAA->getRange().isValid() && Range.isInvalid()) {
+        return nullptr;
+      }
+
+      // If there is an existing attribute for this platform that is implicit
+      // and the new attribute is explicit then erase the old one and
+      // continue processing the attributes.
+      if (Range.isValid() && OldAA->getRange().isInvalid()) {
+        Attrs.erase(Attrs.begin() + i);
+        --e;
+        continue;
+      }
+
       FoundAny = true;
       VersionTuple OldIntroduced = OldAA->getIntroduced();
       VersionTuple OldDeprecated = OldAA->getDeprecated();
@@ -2000,6 +2016,74 @@ static void handleAvailabilityAttr(Sema &S, Decl *D,
                                                       Index);
   if (NewAttr)
     D->addAttr(NewAttr);
+
+  // Transcribe "ios" to "watchos" (and add a new attribute) if the versioning
+  // matches before the start of the watchOS platform.
+  if (S.Context.getTargetInfo().getTriple().isWatchOS()) {
+    IdentifierInfo *NewII = nullptr;
+    if (II->getName() == "ios")
+      NewII = &S.Context.Idents.get("watchos");
+    else if (II->getName() == "ios_app_extension")
+      NewII = &S.Context.Idents.get("watchos_app_extension");
+
+    if (NewII) {
+        auto adjustWatchOSVersion = [](VersionTuple Version) -> VersionTuple {
+          if (Version.empty())
+            return Version;
+          auto Major = Version.getMajor();
+          auto NewMajor = Major >= 9 ? Major - 7 : 0;
+          if (NewMajor >= 2) {
+            if (Version.getMinor().hasValue()) {
+              if (Version.getSubminor().hasValue())
+                return VersionTuple(NewMajor, Version.getMinor().getValue(),
+                                    Version.getSubminor().getValue());
+              else
+                return VersionTuple(NewMajor, Version.getMinor().getValue());
+            }
+          }
+
+          return VersionTuple(2, 0);
+        };
+
+        auto NewIntroduced = adjustWatchOSVersion(Introduced.Version);
+        auto NewDeprecated = adjustWatchOSVersion(Deprecated.Version);
+        auto NewObsoleted = adjustWatchOSVersion(Obsoleted.Version);
+
+        AvailabilityAttr *NewAttr = S.mergeAvailabilityAttr(ND,
+                                                            SourceRange(),
+                                                            NewII,
+                                                            NewIntroduced,
+                                                            NewDeprecated,
+                                                            NewObsoleted,
+                                                            IsUnavailable, Str,
+                                                            Sema::AMK_None,
+                                                            Index);
+        if (NewAttr)
+          D->addAttr(NewAttr);
+      }
+  } else if (S.Context.getTargetInfo().getTriple().isTvOS()) {
+    // Transcribe "ios" to "tvos" (and add a new attribute) if the versioning
+    // matches before the start of the tvOS platform.
+    IdentifierInfo *NewII = nullptr;
+    if (II->getName() == "ios")
+      NewII = &S.Context.Idents.get("tvos");
+    else if (II->getName() == "ios_app_extension")
+      NewII = &S.Context.Idents.get("tvos_app_extension");
+
+    if (NewII) {
+        AvailabilityAttr *NewAttr = S.mergeAvailabilityAttr(ND,
+                                                            SourceRange(),
+                                                            NewII,
+                                                            Introduced.Version,
+                                                            Deprecated.Version,
+                                                            Obsoleted.Version,
+                                                            IsUnavailable, Str,
+                                                            Sema::AMK_None,
+                                                            Index);
+        if (NewAttr)
+          D->addAttr(NewAttr);
+      }
+  }
 }
 
 template <class T>

clang/test/Sema/attr-availability-tvos.c

@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 "-triple" "x86_64-apple-tvos3.0" -fsyntax-only -verify %s
+
+void f0(int) __attribute__((availability(tvos,introduced=2.0,deprecated=2.1))); // expected-note {{'f0' has been explicitly marked deprecated here}}
+void f1(int) __attribute__((availability(tvos,introduced=2.1)));
+void f2(int) __attribute__((availability(tvos,introduced=2.0,deprecated=3.0))); // expected-note {{'f2' has been explicitly marked deprecated here}}
+void f3(int) __attribute__((availability(tvos,introduced=3.0)));
+void f4(int) __attribute__((availability(macosx,introduced=10.1,deprecated=10.3,obsoleted=10.5), availability(tvos,introduced=2.0,deprecated=2.1,obsoleted=3.0))); // expected-note{{explicitly marked unavailable}}
+
+void f5(int) __attribute__((availability(tvos,introduced=2.0))) __attribute__((availability(tvos,deprecated=3.0))); // expected-note {{'f5' has been explicitly marked deprecated here}}
+void f6(int) __attribute__((availability(tvos,deprecated=3.0)));
+void f6(int) __attribute__((availability(tvos,introduced=2.0))); // expected-note {{'f6' has been explicitly marked deprecated here}}
+
+void test() {
+  f0(0); // expected-warning{{'f0' is deprecated: first deprecated in tvOS 2.1}}
+  f1(0);
+  f2(0); // expected-warning{{'f2' is deprecated: first deprecated in tvOS 3.0}}
+  f3(0);
+  f4(0); // expected-error{{f4' is unavailable: obsoleted in tvOS 3.0}}
+  f5(0); // expected-warning{{'f5' is deprecated: first deprecated in tvOS 3.0}}
+  f6(0); // expected-warning{{'f6' is deprecated: first deprecated in tvOS 3.0}}
+}

clang/test/Sema/attr-availability-watchos.c

@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 "-triple" "x86_64-apple-watchos3.0" -fsyntax-only -verify %s
+
+void f0(int) __attribute__((availability(watchos,introduced=2.0,deprecated=2.1))); // expected-note {{'f0' has been explicitly marked deprecated here}}
+void f1(int) __attribute__((availability(watchos,introduced=2.1)));
+void f2(int) __attribute__((availability(watchos,introduced=2.0,deprecated=3.0))); // expected-note {{'f2' has been explicitly marked deprecated here}}
+void f3(int) __attribute__((availability(watchos,introduced=3.0)));
+void f4(int) __attribute__((availability(macosx,introduced=10.1,deprecated=10.3,obsoleted=10.5), availability(watchos,introduced=2.0,deprecated=2.1,obsoleted=3.0))); // expected-note{{explicitly marked unavailable}}
+
+void f5(int) __attribute__((availability(watchos,introduced=2.0))) __attribute__((availability(watchos,deprecated=3.0))); // expected-note {{'f5' has been explicitly marked deprecated here}}
+void f6(int) __attribute__((availability(watchos,deprecated=3.0)));
+void f6(int) __attribute__((availability(watchos,introduced=2.0))); // expected-note {{'f6' has been explicitly marked deprecated here}}
+
+void test() {
+  f0(0); // expected-warning{{'f0' is deprecated: first deprecated in watchOS 2.1}}
+  f1(0);
+  f2(0); // expected-warning{{'f2' is deprecated: first deprecated in watchOS 3.0}}
+  f3(0);
+  f4(0); // expected-error{{f4' is unavailable: obsoleted in watchOS 3.0}}
+  f5(0); // expected-warning{{'f5' is deprecated: first deprecated in watchOS 3.0}}
+  f6(0); // expected-warning{{'f6' is deprecated: first deprecated in watchOS 3.0}}
+}