Serialization: Fix missing register*Abbr() calls for variadic generic SIL stuff

Author: slavapestov

lib/Serialization/Serialization.cpp

@@ -5549,6 +5549,7 @@ void Serializer::writeAllDeclsAndTypes() {
   registerDeclTypeAbbr<ExistentialMetatypeTypeLayout>();
   registerDeclTypeAbbr<PrimaryArchetypeTypeLayout>();
   registerDeclTypeAbbr<OpenedArchetypeTypeLayout>();
+  registerDeclTypeAbbr<ElementArchetypeTypeLayout>();
   registerDeclTypeAbbr<OpaqueArchetypeTypeLayout>();
   registerDeclTypeAbbr<PackArchetypeTypeLayout>();
   registerDeclTypeAbbr<ProtocolCompositionTypeLayout>();
@@ -5568,6 +5569,7 @@ void Serializer::writeAllDeclsAndTypes() {
   registerDeclTypeAbbr<DynamicSelfTypeLayout>();
   registerDeclTypeAbbr<PackExpansionTypeLayout>();
   registerDeclTypeAbbr<PackTypeLayout>();
+  registerDeclTypeAbbr<SILPackTypeLayout>();
 
   registerDeclTypeAbbr<ErrorFlagLayout>();
   registerDeclTypeAbbr<ErrorTypeLayout>();

lib/Serialization/SerializeSIL.cpp

@@ -3057,6 +3057,8 @@ void SILSerializer::writeSILBlock(const SILModule *SILMod) {
   registerSILAbbr<SILInstLinearFunctionExtractLayout>();
   registerSILAbbr<SILInstIncrementProfilerCounterLayout>();
   registerSILAbbr<SILInstHasSymbolLayout>();
+  registerSILAbbr<SILPackElementGetLayout>();
+  registerSILAbbr<SILPackElementSetLayout>();
 
   registerSILAbbr<VTableLayout>();
   registerSILAbbr<VTableEntryLayout>();

test/SIL/Serialization/pack_expansion_type.swift

@@ -0,0 +1,19 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-swift-frontend -emit-module %s -emit-module-path %t/pack_expansion_type.swiftmodule -DLIB
+// RUN: %target-swift-frontend -emit-sil %s -I %t -DAPP
+
+#if LIB
+
+public func callee<each T>(_: repeat each T) {}
+
+@_transparent public func caller<each T>(_ t: repeat each T) {
+  callee(repeat [each t])
+}
+
+#elseif APP
+
+import pack_expansion_type
+
+caller(1, "hi", false)
+
+#endif