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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 (type $0)
;; CHECK-NEXT: (local $nn anyref)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (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-nn-tuple (type $0)
;; CHECK-NEXT: (local $nn (tuple i32 anyref i64))
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (try
;; CHECK-NEXT: (do
;; CHECK-NEXT: (local.set $nn
;; CHECK-NEXT: (tuple.make 3
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (ref.null none)
;; CHECK-NEXT: )
;; CHECK-NEXT: (i64.const 0)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (catch_all
;; CHECK-NEXT: (tuple.drop 3
;; CHECK-NEXT: (tuple.make 3
;; CHECK-NEXT: (tuple.extract 3 0
;; CHECK-NEXT: (local.get $nn)
;; CHECK-NEXT: )
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (tuple.extract 3 1
;; CHECK-NEXT: (local.get $nn)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (tuple.extract 3 2
;; CHECK-NEXT: (local.get $nn)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $test-nn-tuple
;; Same as above, but now the local is a tuple containing a non-nullable element
(local $nn (tuple i32 (ref any) i64))
(local.set $nn
(tuple.make 3
(i32.const 0)
(ref.as_non_null
(ref.null any)
)
(i64.const 0)
)
)
(try
(do
(tuple.drop 3
(local.get $nn)
)
)
(catch_all
(tuple.drop 3
(local.get $nn)
)
)
)
)
;; CHECK: (func $test-nullable (type $0)
;; CHECK-NEXT: (local $nullable anyref)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (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)
)
)
)
)
;; CHECK: (func $if-return-tuple-nn (type $0)
;; CHECK-NEXT: (local $temp (tuple (ref func) nullref))
;; CHECK-NEXT: (if
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-return-tuple-nn
(local $temp (tuple (ref func) (ref null none)))
;; We should not emit a return value for this if, as the tuple has a non-
;; nullable element, so it is nondefaultable.
;;
;; Instead, we can remove the local.set entirely, as it has no gets.
(if
(i32.const 0)
(then
(local.set $temp
(tuple.make 2
(ref.func $if-return-tuple-nn)
(ref.null none)
)
)
)
)
)
)
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