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(module
;; Statement switch
(func (export "stmt") (param $i i32) (result i32)
(local $j i32)
(set_local $j (i32.const 100))
(block $switch
(block $7
(block $default
(block $6
(block $5
(block $4
(block $3
(block $2
(block $1
(block $0
(br_table $0 $1 $2 $3 $4 $5 $6 $7 $default
(get_local $i)
)
) ;; 0
(return (get_local $i))
) ;; 1
(nop)
;; fallthrough
) ;; 2
;; fallthrough
) ;; 3
(set_local $j (i32.sub (i32.const 0) (get_local $i)))
(br $switch)
) ;; 4
(br $switch)
) ;; 5
(set_local $j (i32.const 101))
(br $switch)
) ;; 6
(set_local $j (i32.const 101))
;; fallthrough
) ;; default
(set_local $j (i32.const 102))
) ;; 7
;; fallthrough
)
(return (get_local $j))
)
;; Expression switch
(func (export "expr") (param $i i64) (result i64)
(local $j i64)
(set_local $j (i64.const 100))
(return
(block $switch i64
(block $7
(block $default
(block $4
(block $5
(block $6
(block $3
(block $2
(block $1
(block $0
(br_table $0 $1 $2 $3 $4 $5 $6 $7 $default
(i32.wrap/i64 (get_local $i))
)
) ;; 0
(return (get_local $i))
) ;; 1
(nop)
;; fallthrough
) ;; 2
;; fallthrough
) ;; 3
(br $switch (i64.sub (i64.const 0) (get_local $i)))
) ;; 6
(set_local $j (i64.const 101))
;; fallthrough
) ;; 4
;; fallthrough
) ;; 5
;; fallthrough
) ;; default
(br $switch (get_local $j))
) ;; 7
(i64.const -5)
)
)
)
;; Argument switch
(func (export "arg") (param $i i32) (result i32)
(return
(block $2 i32
(i32.add (i32.const 10)
(block $1 i32
(i32.add (i32.const 100)
(block $0 i32
(i32.add (i32.const 1000)
(block $default i32
(br_table $0 $1 $2 $default
(i32.mul (i32.const 2) (get_local $i))
(i32.and (i32.const 3) (get_local $i))
)
)
)
)
)
)
)
)
)
)
;; Corner cases
(func (export "corner") (result i32)
(block
(br_table 0 (i32.const 0))
)
(i32.const 1)
)
)
(assert_return (invoke "stmt" (i32.const 0)) (i32.const 0))
(assert_return (invoke "stmt" (i32.const 1)) (i32.const -1))
(assert_return (invoke "stmt" (i32.const 2)) (i32.const -2))
(assert_return (invoke "stmt" (i32.const 3)) (i32.const -3))
(assert_return (invoke "stmt" (i32.const 4)) (i32.const 100))
(assert_return (invoke "stmt" (i32.const 5)) (i32.const 101))
(assert_return (invoke "stmt" (i32.const 6)) (i32.const 102))
(assert_return (invoke "stmt" (i32.const 7)) (i32.const 100))
(assert_return (invoke "stmt" (i32.const -10)) (i32.const 102))
(assert_return (invoke "expr" (i64.const 0)) (i64.const 0))
(assert_return (invoke "expr" (i64.const 1)) (i64.const -1))
(assert_return (invoke "expr" (i64.const 2)) (i64.const -2))
(assert_return (invoke "expr" (i64.const 3)) (i64.const -3))
(assert_return (invoke "expr" (i64.const 6)) (i64.const 101))
(assert_return (invoke "expr" (i64.const 7)) (i64.const -5))
(assert_return (invoke "expr" (i64.const -10)) (i64.const 100))
(assert_return (invoke "arg" (i32.const 0)) (i32.const 110))
(assert_return (invoke "arg" (i32.const 1)) (i32.const 12))
(assert_return (invoke "arg" (i32.const 2)) (i32.const 4))
(assert_return (invoke "arg" (i32.const 3)) (i32.const 1116))
(assert_return (invoke "arg" (i32.const 4)) (i32.const 118))
(assert_return (invoke "arg" (i32.const 5)) (i32.const 20))
(assert_return (invoke "arg" (i32.const 6)) (i32.const 12))
(assert_return (invoke "arg" (i32.const 7)) (i32.const 1124))
(assert_return (invoke "arg" (i32.const 8)) (i32.const 126))
(assert_return (invoke "corner") (i32.const 1))
(assert_invalid (module (func (br_table 3 (i32.const 0)))) "unknown label")
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