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;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
;; RUN: wasm-opt %s --simplify-locals -all -S -o - | filecheck %s
(module
;; CHECK: (func $test-nn
;; CHECK-NEXT: (local $nn anyref)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (try $try
;; CHECK-NEXT: (do
;; CHECK-NEXT: (local.set $nn
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (ref.null none)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (catch_all
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (local.get $nn)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $test-nn
(local $nn (ref any))
;; We can sink this set into the try, but the spec does not allow it to
;; remain non-nullable. Even though we are not changing dominance (we are
;; not changing it, because there is nothing that can throw in the try's
;; body that can reach the catch_all before the local.set that we move
;; there). See
;; https://github.com/WebAssembly/function-references/issues/44#issuecomment-1083146887
(local.set $nn
(ref.as_non_null
(ref.null any)
)
)
(try
(do
(drop
(local.get $nn)
)
)
(catch_all
(drop
(local.get $nn)
)
)
)
)
;; CHECK: (func $test-nullable
;; CHECK-NEXT: (local $nullable anyref)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (try $try
;; CHECK-NEXT: (do
;; CHECK-NEXT: (local.set $nullable
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (ref.null none)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (catch_all
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $nullable)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $test-nullable
;; As above, but now the local is nullable. Here we can optimize the set
;; into the try, with no other necessary changes.
(local $nullable (ref null any))
(local.set $nullable
(ref.as_non_null
(ref.null any)
)
)
(try
(do
(drop
(local.get $nullable)
)
)
(catch_all
(drop
(local.get $nullable)
)
)
)
)
)
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