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[test] Improve array.init_elem tests #2097

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rossberg merged 1 commit into from
Mar 1, 2026
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[test] Improve array.init_elem tests #2097

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75 changes: 62 additions & 13 deletions test/core/gc/array_init_elem.wast
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Original file line number Diff line number Diff line change
Expand Up @@ -42,23 +42,30 @@
)

(module
(type $t_f (func))
(type $arrref (array (ref $t_f)))
(type $arrref_mut (array (mut funcref)))

(global $g_arrref (ref $arrref) (array.new $arrref (ref.func $dummy) (i32.const 12)))
(global $g_arrref_mut (ref $arrref_mut) (array.new_default $arrref_mut (i32.const 12)))

(table $t 1 funcref)

(elem $e1 func $dummy $dummy $dummy $dummy $dummy $dummy $dummy $dummy $dummy $dummy $dummy $dummy)

(func $dummy
)

(func (export "array_call_nth") (param $1 i32)
(table.set $t (i32.const 0) (array.get $arrref_mut (global.get $g_arrref_mut) (local.get $1)))
(call_indirect $t (i32.const 0))
(elem $e1 func $zero $one $two $three $four $five $six $seven $eight $nine $ten $eleven)

(func $zero (result i32) (i32.const 0))
(func $one (result i32) (i32.const 1))
(func $two (result i32) (i32.const 2))
(func $three (result i32) (i32.const 3))
(func $four (result i32) (i32.const 4))
(func $five (result i32) (i32.const 5))
(func $six (result i32) (i32.const 6))
(func $seven (result i32) (i32.const 7))
(func $eight (result i32) (i32.const 8))
(func $nine (result i32) (i32.const 9))
(func $ten (result i32) (i32.const 10))
(func $eleven (result i32) (i32.const 11))

(func (export "array_call_nth") (param $n i32) (result i32)
(table.set $t (i32.const 0) (array.get $arrref_mut (global.get $g_arrref_mut) (local.get $n)))
(call_indirect $t (result i32) (i32.const 0))
)

(func (export "array_init_elem-null")
Expand Down Expand Up @@ -98,11 +105,53 @@
;; normal cases
(assert_return (invoke "array_init_elem" (i32.const 2) (i32.const 3) (i32.const 2)))
(assert_trap (invoke "array_call_nth" (i32.const 1)) "uninitialized element")
(assert_return (invoke "array_call_nth" (i32.const 2)))
(assert_return (invoke "array_call_nth" (i32.const 3)))
(assert_return (invoke "array_call_nth" (i32.const 2)) (i32.const 3))
(assert_return (invoke "array_call_nth" (i32.const 3)) (i32.const 4))
(assert_trap (invoke "array_call_nth" (i32.const 4)) "uninitialized element")

;; init_data/elem with dropped segments traps for non-zero length
(assert_return (invoke "drop_segs"))
(assert_return (invoke "array_init_elem" (i32.const 0) (i32.const 0) (i32.const 0)))
(assert_trap (invoke "array_init_elem" (i32.const 0) (i32.const 0) (i32.const 1)) "out of bounds table access")

(module
(type $arrref_mut (array (mut arrayref)))

(global $g_arrref_mut (ref $arrref_mut) (array.new_default $arrref_mut (i32.const 2)))

(elem $e1 arrayref
(item (array.new_default $arrref_mut (i32.const 1)))
(item (array.new_default $arrref_mut (i32.const 2)))
)

(func (export "array_init_elem") (param $1 i32) (param $2 i32) (param $3 i32)
(array.init_elem $arrref_mut $e1 (global.get $g_arrref_mut) (local.get $1) (local.get $2) (local.get $3))
)

(func (export "array_len_nth") (param $n i32) (result i32)
(array.len (array.get $arrref_mut (global.get $g_arrref_mut) (local.get $n)))
)

(func (export "array_eq_elems") (param $i i32) (param $j i32) (result i32)
(ref.eq
(array.get $arrref_mut (global.get $g_arrref_mut) (local.get $i))
(array.get $arrref_mut (global.get $g_arrref_mut) (local.get $j))
)
)
)

;; Array starts uninitialized
(assert_trap (invoke "array_len_nth" (i32.const 0)) "null array reference")
(assert_trap (invoke "array_len_nth" (i32.const 1)) "null array reference")

;; Initialize the array
(assert_return (invoke "array_init_elem" (i32.const 0) (i32.const 0) (i32.const 2)))
(assert_return (invoke "array_len_nth" (i32.const 0)) (i32.const 1))
(assert_return (invoke "array_len_nth" (i32.const 1)) (i32.const 2))
(assert_return (invoke "array_eq_elems" (i32.const 0) (i32.const 1)) (i32.const 0))

;; Copy the first element at the second index and check that they are equal.
(assert_return (invoke "array_init_elem" (i32.const 1) (i32.const 0) (i32.const 1)))
(assert_return (invoke "array_len_nth" (i32.const 0)) (i32.const 1))
(assert_return (invoke "array_len_nth" (i32.const 1)) (i32.const 1))
(assert_return (invoke "array_eq_elems" (i32.const 0) (i32.const 1)) (i32.const 1))