(module ;; Statement switch (func (export "stmt") (param $i i32) (result i32) (local $j i32) (local.set $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 (local.get $i) ) ) ;; 0 (return (local.get $i)) ) ;; 1 (nop) ;; fallthrough ) ;; 2 ;; fallthrough ) ;; 3 (local.set $j (i32.sub (i32.const 0) (local.get $i))) (br $switch) ) ;; 4 (br $switch) ) ;; 5 (local.set $j (i32.const 101)) (br $switch) ) ;; 6 (local.set $j (i32.const 101)) ;; fallthrough ) ;; default (local.set $j (i32.const 102)) ) ;; 7 ;; fallthrough ) (return (local.get $j)) ) ;; Expression switch (func (export "expr") (param $i i64) (result i64) (local $j i64) (local.set $j (i64.const 100)) (return (block $switch (result 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 (local.get $i)) ) ) ;; 0 (return (local.get $i)) ) ;; 1 (nop) ;; fallthrough ) ;; 2 ;; fallthrough ) ;; 3 (br $switch (i64.sub (i64.const 0) (local.get $i))) ) ;; 6 (local.set $j (i64.const 101)) ;; fallthrough ) ;; 4 ;; fallthrough ) ;; 5 ;; fallthrough ) ;; default (br $switch (local.get $j)) ) ;; 7 (i64.const -5) ) ) ) ;; Argument switch (func (export "arg") (param $i i32) (result i32) (return (block $2 (result i32) (i32.add (i32.const 10) (block $1 (result i32) (i32.add (i32.const 100) (block $0 (result i32) (i32.add (i32.const 1000) (block $default (result i32) (br_table $0 $1 $2 $default (i32.mul (i32.const 2) (local.get $i)) (i32.and (i32.const 3) (local.get $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")