TypeCheckType: Fix missing any fix-it for IUO

Author: AnthonyLatsis

lib/Sema/TypeCheckType.cpp

@@ -6010,6 +6010,7 @@ class ExistentialTypeSyntaxChecker : public ASTWalker {
   bool existentialNeedsParens(TypeRepr *parent) const {
     switch (parent->getKind()) {
     case TypeReprKind::Optional:
+    case TypeReprKind::ImplicitlyUnwrappedOptional:
     case TypeReprKind::Protocol:
       return true;
     case TypeReprKind::Metatype:
@@ -6025,7 +6026,6 @@ class ExistentialTypeSyntaxChecker : public ASTWalker {
     case TypeReprKind::GenericIdent:
     case TypeReprKind::Member:
     case TypeReprKind::Dictionary:
-    case TypeReprKind::ImplicitlyUnwrappedOptional:
     case TypeReprKind::Inverse:
     case TypeReprKind::Tuple:
     case TypeReprKind::Fixed:

test/type/explicit_existential.swift

@@ -321,6 +321,8 @@ func testAnyFixIt() {
   let _: (HasAssoc).Protocol = (any HasAssoc).self
   // expected-error@+1 {{use of protocol 'HasAssoc' as a type must be written 'any HasAssoc'}}{{10-18=(any HasAssoc)}}
   let _: HasAssoc? = ConformingType()
+  // expected-error@+1 {{use of protocol 'HasAssoc' as a type must be written 'any HasAssoc'}}{{10-18=(any HasAssoc)}}
+  let _: HasAssoc!
   // expected-error@+1 {{use of protocol 'HasAssoc' as a type must be written 'any HasAssoc'}}{{10-23=(any HasAssoc.Type)}}
   let _: HasAssoc.Type? = ConformingType.self
   // expected-error@+1 {{use of protocol 'HasAssoc' as a type must be written 'any HasAssoc'}}{{10-18=(any HasAssoc)}}

test/type/explicit_existential_swift6.swift

@@ -354,6 +354,8 @@ func testAnyFixIt() {
   let _: (HasAssoc).Protocol = (any HasAssoc).self
   // expected-error@+1 {{use of protocol 'HasAssoc' as a type must be written 'any HasAssoc'}}{{10-18=(any HasAssoc)}}
   let _: HasAssoc? = ConformingType()
+  // expected-error@+1 {{use of protocol 'HasAssoc' as a type must be written 'any HasAssoc'}}{{10-18=(any HasAssoc)}}
+  let _: HasAssoc!
   // expected-error@+1 {{use of protocol 'HasAssoc' as a type must be written 'any HasAssoc'}}{{10-23=(any HasAssoc.Type)}}
   let _: HasAssoc.Type? = ConformingType.self
   // expected-error@+1 {{use of protocol 'HasAssoc' as a type must be written 'any HasAssoc'}}{{10-18=(any HasAssoc)}}