Merge pull request #64270 from meg-gupta/addtest

Add test for  #64258

Author: swift-ci

test/SILOptimizer/sil_combine_enum_addr.sil

@@ -250,3 +250,32 @@ bb22:
   inject_enum_addr %3 : $*Optional<CustomStringConvertible>, #Optional.none!enumelt
   br bb2
 }
+
+sil @no_init : $@convention(thin) () -> (@out ())
+
+// CHECK-LABEL: sil @test_empty_tuple_uninintialized : $@convention(thin) () -> () {
+// CHECK: init_enum_data_addr
+// CHECK: inject_enum_addr
+// CHECK-LABEL: } // end sil function 'test_empty_tuple_uninintialized'
+sil @test_empty_tuple_uninintialized : $@convention(thin) () -> () {
+bb0:
+  %0 = alloc_stack $Optional<()>
+  %1 = init_enum_data_addr %0 : $*Optional<()>, #Optional.some!enumelt
+  %f = function_ref @no_init : $@convention(thin) () -> (@out ())
+  apply %f(%1) : $@convention(thin) () -> (@out ())
+  inject_enum_addr %0 : $*Optional<()>, #Optional.some!enumelt
+  %2 = load %0 : $*Optional<()>
+  switch_enum %2 : $Optional<()>, case #Optional.some!enumelt: bb1, case #Optional.none!enumelt: bb2
+
+bb1(%4 : $()):
+  br bb3
+
+bb2:
+  br bb3
+
+bb3:
+  dealloc_stack %0 : $*Optional<()>
+  %8 = tuple ()
+  return %8 : $()
+}
+