test/gc.wast

;; A preliminary test for prototype GC types and instructions.
;; TODO: Move subtype tests from reference-types.wast here?
;; TODO: The test assumes that `(i31.new (i32.const N))` is a valid constant
;; initializer for i31ref types globals, which isn't yet specified.

(module
  ;; Test global initializer expressions
  (global $global_anyref (mut anyref) (ref.null any))
  (global $global_eqref (mut eqref) (ref.null eq))
  (global $global_i31ref (mut i31ref) (i31.new (i32.const 0)))

  ;; Test subtype relationship in global initializer expressions
  (global $global_anyref2 (mut anyref) (ref.null eq))
  (global $global_anyref3 (mut anyref) (i31.new (i32.const 0)))
  (global $global_eqref2 (mut eqref) (i31.new (i32.const 0)))

  (func $test
    (param $local_i31ref i31ref)
    (param $local_structref structref)

    (local $local_i32 i32)
    (local $local_anyref anyref)
    (local $local_eqref eqref)

    ;; Test types for local.get/set
    (local.set $local_anyref (local.get $local_anyref))
    (local.set $local_anyref (global.get $global_anyref))
    (local.set $local_anyref (ref.null any))
    (local.set $local_eqref (local.get $local_eqref))
    (local.set $local_eqref (global.get $global_eqref))
    (local.set $local_eqref (ref.null eq))
    (local.set $local_i31ref (local.get $local_i31ref))
    (local.set $local_i31ref (global.get $global_i31ref))
    (local.set $local_i31ref (i31.new (i32.const 0)))

    ;; Test subtype relationship for local.set
    (local.set $local_anyref (local.get $local_eqref))
    (local.set $local_anyref (global.get $global_eqref))
    (local.set $local_anyref (ref.null eq))
    (local.set $local_anyref (local.get $local_i31ref))
    (local.set $local_anyref (global.get $global_i31ref))
    (local.set $local_anyref (i31.new (i32.const 0)))
    (local.set $local_eqref (local.get $local_i31ref))
    (local.set $local_eqref (global.get $global_i31ref))
    (local.set $local_eqref (i31.new (i32.const 0)))

    ;; Test types for global.get/set
    (global.set $global_anyref (local.get $local_anyref))
    (global.set $global_anyref (global.get $global_anyref))
    (global.set $global_anyref (ref.null any))
    (global.set $global_eqref (local.get $local_eqref))
    (global.set $global_eqref (global.get $global_eqref))
    (global.set $global_eqref (ref.null eq))
    (global.set $global_i31ref (local.get $local_i31ref))
    (global.set $global_i31ref (global.get $global_i31ref))
    (global.set $global_i31ref (i31.new (i32.const 0)))

    ;; Test subtype relationship for global.set
    (global.set $global_anyref (local.get $local_eqref))
    (global.set $global_anyref (global.get $global_eqref))
    (global.set $global_anyref (ref.null eq))
    (global.set $global_anyref (local.get $local_i31ref))
    (global.set $global_anyref (global.get $global_i31ref))
    (global.set $global_anyref (i31.new (i32.const 0)))
    (global.set $global_eqref (local.get $local_i31ref))
    (global.set $global_eqref (global.get $global_i31ref))
    (global.set $global_eqref (i31.new (i32.const 0)))

    ;; Test i31.get_s/u
    (local.set $local_i32 (i31.get_s (local.get $local_i31ref)))
    (local.set $local_i32 (i31.get_u (local.get $local_i31ref)))
  )

  (func $test-variants
    (param $local_i31refnull (ref null i31))
    (param $local_i31refnonnull (ref i31))
    (param $local_structrefnull (ref null struct))
    (param $local_structrefnonnull (ref struct))
  )
)