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(module
(event $e (attr 0) (param i32))
(func $cant-push-past-call
(local $x i32)
(block $out
;; This local.set cannot be pushed down, because the call below can throw
(local.set $x (i32.const 1))
(call $cant-push-past-call)
(drop (i32.const 1))
(br_if $out (i32.const 2))
(drop (local.get $x))
)
)
(func $cant-push-past-throw
(local $x i32)
(block $out
;; This local.set cannot be pushed down, because there is 'throw' below
(local.set $x (i32.const 1))
(throw $e (i32.const 0))
(drop (i32.const 1))
(br_if $out (i32.const 2))
(drop (local.get $x))
)
)
(func $can-push-past-throw-within-try
(local $x i32)
(block $out
;; This local.set can be pushed down, because the 'throw' below is going
;; to be caught by the inner catch
(local.set $x (i32.const 1))
(try
(throw $e (i32.const 0))
(catch
(drop (exnref.pop))
)
)
(drop (i32.const 1))
(br_if $out (i32.const 2))
(drop (local.get $x))
)
)
(func $cant-push-past-rethrow-within-catch
(local $x i32)
(block $out
;; This local.set cannot be pushed down, because there is 'rethrow' within
;; the inner catch
(local.set $x (i32.const 1))
(try
(throw $e (i32.const 0))
(catch
(rethrow (exnref.pop))
)
)
(drop (i32.const 1))
(br_if $out (i32.const 2))
(drop (local.get $x))
)
)
(func $push-past-br-on-exn
(local $x i32)
(local $y exnref)
(drop
(block $out (result i32)
(local.set $x (i32.const 1))
(drop
(br_on_exn $out $e (local.get $y))
)
(local.get $x)
)
)
)
)
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