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(module
(func $basic (param $p i32)
(local $x i32)
(set_local $x (i32.const 10))
(call $basic (i32.add (get_local $x) (get_local $x)))
)
(func $split (param $p i32)
(local $x i32)
(if (i32.const 1)
(set_local $x (i32.const 10))
)
(call $basic (i32.add (get_local $x) (get_local $x)))
)
(func $split-but-join (param $p i32)
(local $x i32)
(if (i32.const 1)
(set_local $x (i32.const 10))
(set_local $x (i32.const 10))
)
(call $basic (i32.add (get_local $x) (get_local $x)))
)
(func $split-but-join-different (param $p i32)
(local $x i32)
(if (i32.const 1)
(set_local $x (i32.const 10))
(set_local $x (i32.const 20))
)
(call $basic (i32.add (get_local $x) (get_local $x)))
)
(func $split-but-join-different-b (param $p i32)
(local $x i32)
(if (i32.const 1)
(set_local $x (i32.const 10))
(set_local $x (get_local $p))
)
(call $basic (i32.add (get_local $x) (get_local $x)))
)
(func $split-but-join-init0 (param $p i32)
(local $x i32)
(if (i32.const 1)
(set_local $x (i32.const 0))
)
(call $basic (i32.add (get_local $x) (get_local $x)))
)
(func $later (param $p i32)
(local $x i32)
(set_local $x (i32.const 10))
(call $basic (i32.add (get_local $x) (get_local $x)))
(set_local $x (i32.const 22))
(call $basic (i32.add (get_local $x) (get_local $x)))
(set_local $x (i32.const 39))
)
(func $later2 (param $p i32) (result i32)
(local $x i32)
(set_local $x (i32.const 10))
(set_local $x (i32.add (get_local $x) (get_local $x)))
(get_local $x)
)
(func $two-ways-but-identical (param $p i32) (result i32)
(local $x i32)
(local $y i32)
(set_local $x (i32.const 10))
(if (i32.const 1)
(set_local $y (i32.const 11))
(set_local $y (i32.add (get_local $x) (i32.const 1)))
)
(set_local $y (i32.add (get_local $x) (get_local $y)))
(get_local $y)
)
(func $two-ways-but-almost-identical (param $p i32) (result i32)
(local $x i32)
(local $y i32)
(set_local $x (i32.const 10))
(if (i32.const 1)
(set_local $y (i32.const 12)) ;; 12, not 11...
(set_local $y (i32.add (get_local $x) (i32.const 1)))
)
(set_local $y (i32.add (get_local $x) (get_local $y)))
(get_local $y)
)
(func $deadloop (param $p i32) (result i32)
(local $x i32)
(local $y i32)
(loop $loop ;; we look like we depend on the other, but we don't actually
(set_local $x (if (result i32) (i32.const 1) (i32.const 0) (get_local $y)))
(set_local $y (if (result i32) (i32.const 1) (i32.const 0) (get_local $x)))
(br $loop)
)
)
(func $deadloop2 (param $p i32)
(local $x i32)
(local $y i32)
(loop $loop ;; we look like we depend on the other, but we don't actually
(set_local $x (if (result i32) (i32.const 1) (i32.const 0) (get_local $y)))
(set_local $y (if (result i32) (i32.const 1) (i32.const 0) (get_local $x)))
(call $deadloop2 (get_local $x))
(call $deadloop2 (get_local $y))
(br $loop)
)
)
(func $deadloop3 (param $p i32)
(local $x i32)
(local $y i32)
(loop $loop ;; we look like we depend on the other, but we don't actually
(set_local $x (if (result i32) (i32.const 1) (i32.const 0) (get_local $x)))
(set_local $y (if (result i32) (i32.const 1) (i32.const 0) (get_local $y)))
(call $deadloop2 (get_local $x))
(call $deadloop2 (get_local $y))
(br $loop)
)
)
(func $through-tee (param $x i32) (param $y i32) (result i32)
(set_local $x
(tee_local $y
(i32.const 7)
)
)
(return
(i32.add
(get_local $x)
(get_local $y)
)
)
)
(func $through-tee-more (param $x i32) (param $y i32) (result i32)
(set_local $x
(i32.eqz
(tee_local $y
(i32.const 7)
)
)
)
(return
(i32.add
(get_local $x)
(get_local $y)
)
)
)
(func $multipass (param $0 i32) (param $1 i32) (param $2 i32) (result i32)
(local $3 i32)
(if
(get_local $3)
(set_local $3 ;; this set is completely removed, allowing later opts
(i32.const 24)
)
)
(if
(get_local $3)
(set_local $2
(i32.const 0)
)
)
(get_local $2)
)
)
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