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;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
;; RUN: wasm-opt %s --local-subtyping -all -S -o - | filecheck %s
(module
(type $struct (struct))
;; CHECK: (import "out" "i32" (func $i32 (type $0) (result i32)))
(import "out" "i32" (func $i32 (result i32)))
;; CHECK: (func $non-nullable (type $1)
;; CHECK-NEXT: (local $x (ref none))
;; CHECK-NEXT: (local $y (ref $0))
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (ref.null none)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.set $y
;; CHECK-NEXT: (ref.func $i32)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $non-nullable
(local $x (ref null $struct))
(local $y funcref)
;; x is assigned a value that is non-nullable.
(local.set $x
(ref.as_non_null (ref.null $struct))
)
;; y is assigned a value that is non-nullable, and also allows a more
;; specific heap type.
(local.set $y
(ref.func $i32)
)
;; Verify that the presence of a get does not alter things.
(drop
(local.get $x)
)
)
;; CHECK: (func $uses-default (type $2) (param $i i32)
;; CHECK-NEXT: (local $x nullref)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $i)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (ref.null none)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $uses-default (param $i i32)
(local $x (ref null any))
(if
(local.get $i)
;; The only set to this local uses a non-nullable type.
(then
(local.set $x
(ref.as_non_null (ref.null $struct))
)
)
)
(drop
;; This get may use the null value, so we can refine the heap type but not
;; alter nullability.
(local.get $x)
)
)
)
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