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;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
;; RUN: wasm-opt %s -all --ssa -S -o - | filecheck %s
(module
;; CHECK: (type $A (struct))
(type $A (struct ))
;; CHECK: (func $foo (type $1)
;; CHECK-NEXT: )
(func $foo)
;; CHECK: (func $bar (type $2) (param $x (ref func))
;; CHECK-NEXT: (local $1 (ref func))
;; CHECK-NEXT: (local $2 (ref func))
;; CHECK-NEXT: (local.set $1
;; CHECK-NEXT: (ref.func $foo)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.set $2
;; CHECK-NEXT: (ref.func $bar)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $2)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $bar (param $x (ref func))
;; assign a non-nullable parameter multiple times, which causes ssa to create
;; new locals so that each is assigned only once
(local.set $x (ref.func $foo))
(drop (local.get $x))
(local.set $x (ref.func $bar))
(drop (local.get $x))
)
;; CHECK: (func $refine-to-null (type $3) (result (ref $A))
;; CHECK-NEXT: (local $0 (ref null $A))
;; CHECK-NEXT: (block $label (result (ref none))
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (br_on_cast $label nullref (ref none)
;; CHECK-NEXT: (ref.null none)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $refine-to-null (result (ref $A))
(local $0 (ref null $A))
(block $label (result (ref $A))
(drop
(br_on_cast $label (ref null $A) (ref $A)
;; This will turn into a null, which has a more refined type that affects
;; the br_on_cast parent.
(local.get $0)
)
)
(unreachable)
)
)
;; CHECK: (func $null-tuple (type $4) (result funcref)
;; CHECK-NEXT: (local $tuple (tuple i32 funcref))
;; CHECK-NEXT: (tuple.extract 2 1
;; CHECK-NEXT: (tuple.make 2
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: (ref.null nofunc)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $null-tuple (result funcref)
(local $tuple (tuple i32 funcref))
(tuple.extract 2 1
(local.get $tuple)
)
)
)
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