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[spec] Test subsumption in return call result types #2211

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Merged
rossberg merged 3 commits into from
Jul 23, 2026
Merged

[spec] Test subsumption in return call result types #2211

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98e9487
[spec] test subsumption in return call result types
CharlieTap Jul 19, 2026
1e48b58
use folded expression style and relocate tests
CharlieTap Jul 19, 2026
25d8d85
rework tests into non gc suites
CharlieTap Jul 22, 2026
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14 changes: 14 additions & 0 deletions test/core/return_call.wast
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Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,11 @@
(func (export "type-f64-i64-to-i32-f32") (param f64 i64) (result i32 f32)
(return_call $swizzle (local.get 0) (local.get 1))
)

;; Result subtyping
(type $t (func))
(func $f (result (ref null $t)) (ref.null $t))
(func (export "type-funcref") (result funcref) (return_call $f))
)

(assert_return (invoke "type-i32") (i32.const 0x132))
Expand Down Expand Up @@ -134,6 +139,7 @@
(assert_return (invoke "odd" (i64.const 999_999)) (i32.const 44))
(assert_return (invoke "tailprint_i32_f32" (i32.const 5) (f32.const 91.0)))
(assert_return (invoke "type-f64-i64-to-i32-f32" (f64.const 4.2) (i64.const 99)) (i32.const 99) (f32.const 4.2))
(assert_return (invoke "type-funcref") (ref.null func))

;; Invalid typing

Expand All @@ -151,6 +157,14 @@
)
"type mismatch"
)
(assert_invalid
(module
(type $t (func))
(func $type-ref-vs-funcref (result (ref null $t)) (return_call 1))
(func (result funcref) (unreachable))
)
"type mismatch"
)

(assert_invalid
(module
Expand Down
19 changes: 19 additions & 0 deletions test/core/return_call_indirect.wast
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Original file line number Diff line number Diff line change
Expand Up @@ -234,6 +234,14 @@
(func (export "call_mpmr") (param f64 i64) (result i32 f32)
(return_call_indirect $tab4 (param f64 i64) (result i32 f32) (local.get 0) (local.get 1) (i32.const 1))
)

;; Result subtyping
(type $t (func))
(func $f (result (ref null $t)) (ref.null $t))
(table $tab5 funcref (elem $f))
(func (export "type-funcref") (result funcref)
(return_call_indirect $tab5 (result (ref null $t)) (i32.const 0))
)
)

(assert_return (invoke "type-i32") (i32.const 0x132))
Expand Down Expand Up @@ -294,6 +302,7 @@

(assert_return (invoke "call_tailprint" (i32.const 5) (f32.const 91.0)))
(assert_return (invoke "call_mpmr" (f64.const 4.2) (i64.const 99)) (i32.const 99) (f32.const 4.2))
(assert_return (invoke "type-funcref") (ref.null func))

;; Invalid syntax

Expand Down Expand Up @@ -447,6 +456,16 @@
)
"type mismatch"
)
(assert_invalid
(module
(type $t (func))
(table 0 funcref)
(func $type-ref-vs-funcref (result (ref null $t))
(return_call_indirect (result funcref) (i32.const 0))
)
)
"type mismatch"
)

(assert_invalid
(module
Expand Down
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