Add test cases for a few bugs that seem to be fixed already

Cleaning out some old JIRAs, don't want these to regress...

Author: slavapestov

validation-test/compiler_crashers_2_fixed/0047-sr1307.swift

@@ -0,0 +1,47 @@
+// RUN: %target-swift-frontend %s -emit-ir
+
+enum SampleType: UInt8 {
+    case Value = 1
+    case Array
+    case Dictionary
+}
+
+protocol ByteConvertible {
+    init?(bytes: [UInt8], startOffset: Int)
+    func rawBytes() -> [UInt8]
+    func bytesNeeded() -> Int
+}
+
+protocol TypeRequestable {
+    static func containerType() -> SampleType
+}
+
+struct Sample<T, C where T: ByteConvertible, C: TypeRequestable> {
+    let numberOfRecords: UInt32
+    let sizeInBytes: UInt64
+    var records: [T]  = [] // problem line
+
+    init(records: [T]) {
+        numberOfRecords = 0
+        sizeInBytes = 0
+
+        self.records.reserveCapacity(records.count)
+        self.records += records
+    }
+}
+
+extension Sample: ByteConvertible {
+    init?(bytes: [UInt8], startOffset: Int = 0) {
+        numberOfRecords = 0
+        sizeInBytes = 0
+        records = []
+    }
+
+    func rawBytes() -> [UInt8] {
+        return []
+    }
+
+    func bytesNeeded() -> Int {
+        return 0
+    }
+}

validation-test/compiler_crashers_2_fixed/0048-sr2333.swift

@@ -0,0 +1,17 @@
+// RUN: %target-swift-frontend %s -emit-ir
+
+public protocol Proto {
+    associatedtype One
+    associatedtype Two
+
+    static func bar<T>(elm: One, t: T) -> T
+}
+
+struct S<P: Proto> {
+    let x: P.Two
+    func foo<T>(_ t: T) -> T where P.Two == P.One {
+        let x: P.Two = self.x
+        let elm: P.One = x as! P.One
+        return P.bar(elm: elm, t: t)
+    }
+}

validation-test/compiler_crashers_2_fixed/0049-sr2611.swift

@@ -0,0 +1,18 @@
+// RUN: %target-swift-frontend %s -emit-ir
+
+protocol Foo {
+    associatedtype A
+    var value: A { get }
+    init(_ v: A)
+}
+extension Foo {
+    init<T>(pairing other: T)
+        where
+        T: Foo,
+        Self.A == (T.A, T.A) // <-- Look at this, and then at the error below.
+    {
+        let otherValuePaired = (other.value, other.value)
+        let v: A = otherValuePaired // <-- Error: Cannot convert value of
+        self.init(v)                // type '(T.A, T.A)' to specified type 'Self.A'
+    }
+}

validation-test/compiler_crashers_2_fixed/0050-sr3159.swift

@@ -0,0 +1,16 @@
+// RUN: %target-swift-frontend %s -emit-ir
+
+public class Entity{
+}
+public class DataCollection<T>{
+}
+public protocol IEntityCollection : class{
+	func AddEntity(_ entity:Entity)
+}
+public class EntityCollection<T:Entity> : DataCollection<T>, IEntityCollection{
+	public func AddEntity(_ entity: Entity) {}
+}
+public class EntityReference2<TParentEntityCollection:EntityCollection<TParentEntity>, TChildEntityCollection:EntityCollection<TChildEntity>, TChildEntity:Entity, TParentEntity:Entity>
+{
+	public let i = 0
+}

validation-test/compiler_crashers_2_fixed/0051-sr3212.swift

@@ -0,0 +1,18 @@
+// RUN: %target-swift-frontend %s -emit-silgen
+
+protocol CType {
+    init()
+}
+
+protocol BType {
+    associatedtype C: CType
+}
+
+protocol A {
+    associatedtype B: BType
+    typealias C = B.C
+}
+
+func test<T: A>(_ a: T) -> T.C {
+    return T.C()
+}

validation-test/compiler_crashers_2_fixed/0052-sr3478.swift

@@ -0,0 +1,11 @@
+// RUN: %target-swift-frontend %s -typecheck
+
+protocol P {
+  associatedtype A
+}
+
+struct S : P {
+  typealias A = Gen<S>
+}
+
+struct Gen<T: P> {}

validation-test/compiler_crashers_2_fixed/0053-sr490.swift

@@ -0,0 +1,22 @@
+// RUN: %target-swift-frontend %s -emit-ir
+
+enum Value {
+    case IntValue(Int)
+}
+
+protocol Storable {
+    associatedtype Representation
+    
+    static var storageKey : String? { get }
+    var representation : Representation { get }
+}
+
+protocol RawProducable {
+    var rawValueForType : Int16 { get }
+    init<T: Storable where T.Representation == Self>(value: T)
+}
+
+extension Int : Storable {
+    static var storageKey : String? { return "int64Value" }
+    var representation : Value { return Value.IntValue(self) }
+}

validation-test/compiler_crashers_2_fixed/0054-sr833.swift

@@ -0,0 +1,10 @@
+// RUN: %target-swift-frontend %s -emit-ir
+
+public class A <T> {
+    public init() {}
+}
+
+public class B : A <B.C> {
+    public struct C { }
+    public override init() {}
+}

validation-test/compiler_crashers_2_fixed/0057-rdar29587093.swift

@@ -0,0 +1,30 @@
+// RUN: %target-swift-frontend %s -emit-ir
+
+protocol P {
+  associatedtype A
+  func f()
+}
+
+extension P where A == Int {
+  func f() {
+    print("cool")
+  }
+}
+extension P {
+  func f() { print("semi-uncool") }
+  func g() {
+    f()
+  }
+}
+struct X<T> : P {
+  typealias A = T
+}
+
+extension X where A == Int {
+  func f() {
+    print("cool2")
+  }
+}
+
+X<Int>().f()
+X<Int>().g()

validation-test/compiler_crashers_2_fixed/0058-rdar29223240.swift

@@ -0,0 +1,7 @@
+// RUN: %target-swift-frontend %s -emit-ir
+
+extension Array where Iterator.Element == UTF8.CodeUnit {
+  var u8str : String {
+    return ""
+  }
+}