Merge pull request #19653 from nkcsgexi/include-unavilable-var

[Test] Check-in ABI and source stability baseline and start running tests for them.

Author: nkcsgexi

include/swift/AST/DiagnosticsModuleDiffer.def

@@ -58,6 +58,8 @@ ERROR(decl_reorder,none,"%0 in a non-resilient type changes position from %1 to
 
 ERROR(decl_added,none,"%0 is added to a non-resilient type", (StringRef))
 
+ERROR(decl_has_fixed_order_change,none,"%0 is %select{now|no longer}1 a property with fixed layout order", (StringRef, bool))
+
 ERROR(default_arg_removed,none,"%0 has removed default argument from %1", (StringRef, StringRef))
 
 ERROR(conformance_removed,none,"%0 has removed %select{conformance to|inherited protocol}2 %1", (StringRef, StringRef, bool))

test/api-digester/Inputs/cake.swift

@@ -49,6 +49,8 @@ public struct fixedLayoutStruct {
   public var a = 1
   private var b = 2
   var c = 3
+  @available(*, unavailable)
+  public let unavailableProperty = 1
 }
 
 extension Int: P1 { public func bar() {} }

test/api-digester/Inputs/cake1.swift

@@ -55,6 +55,12 @@ public struct fixedLayoutStruct {
   public var a = 1
 }
 
+@_fixed_layout
+public struct fixedLayoutStruct2 {
+  public private(set) var NoLongerWithFixedBinaryOrder = 1
+  public var BecomeFixedBinaryOrder: Int { return 1 }
+}
+
 @_frozen
 public enum FrozenKind {
   case Unchanged

test/api-digester/Inputs/cake2.swift

@@ -59,6 +59,12 @@ public struct fixedLayoutStruct {
   private lazy var lazy_d = 4
 }
 
+@_fixed_layout
+public struct fixedLayoutStruct2 {
+  public var NoLongerWithFixedBinaryOrder: Int { return 1 }
+  public var BecomeFixedBinaryOrder = 1
+}
+
 @_frozen
 public enum FrozenKind {
   case Unchanged