Add a test file for combined SILGen + AddressLowering

Author: atrick

test/SILOptimizer/opaque_values_Onone.swift

@@ -0,0 +1,10 @@
+// RUN: %target-swift-frontend -enable-sil-opaque-values -parse-as-library -emit-sil -Onone %s | %FileCheck %s
+
+// CHECK-LABEL: sil hidden @$s19opaque_values_Onone16generic_identity1txx_tlF : $@convention(thin) <T> (@in_guaranteed T) -> @out T {
+// CHECK: bb0(%0 : $*T, %1 : $*T):
+// CHECK:   debug_value %1 : $*T, let, name "t", argno 1
+// CHECK:   copy_addr %1 to [initialization] %0 : $*T
+// CHECK-LABEL: } // end sil function '$s19opaque_values_Onone16generic_identity1txx_tlF'
+func generic_identity<T>(t: T) -> T {
+  return t
+}