binaryen/test/lit/passes/gufa-multibyte.wast at eb1c0fa3a888b4bb4cc4dda822a54e9ae0077702 · kripken/binaryen · GitHub

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;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited.
;; RUN: foreach %s %t wasm-opt -all --gufa --closed-world -S -o - | filecheck %s

(module
 ;; CHECK:      (type $0 (func))

 ;; CHECK:      (type $array (array (mut i8)))
 (type $array (array (mut i8)))

 ;; CHECK:      (export "test" (func $test))

 ;; CHECK:      (func $test (type $0)
 ;; CHECK-NEXT:  (drop
 ;; CHECK-NEXT:   (i64.load32_u (type $array)
 ;; CHECK-NEXT:    (array.new_default $array
 ;; CHECK-NEXT:     (i32.const 69)
 ;; CHECK-NEXT:    )
 ;; CHECK-NEXT:    (i32.const 0)
 ;; CHECK-NEXT:   )
 ;; CHECK-NEXT:  )
 ;; CHECK-NEXT: )
 (func $test (export "test")
  ;; We initialize with i8s, and read an i64. That should not confuse us, and
  ;; we do not optimize here (though we could, in theory, if we tracked the
  ;; bytes and saw the i64 must be 0).
  (drop
   (i64.load32_u (type $array)
    (array.new_default $array
     (i32.const 69)
    )
    (i32.const 0)
   )
  )
 )
)

(module
 ;; CHECK:      (type $array (array (mut i8)))
 (type $array (array (mut i8)))

 ;; CHECK:      (type $1 (func (param (ref $array))))

 ;; CHECK:      (export "test" (func $test))

 ;; CHECK:      (func $test (type $1) (param $array (ref $array))
 ;; CHECK-NEXT:  (drop
 ;; CHECK-NEXT:   (unreachable)
 ;; CHECK-NEXT:  )
 ;; CHECK-NEXT: )
 (func $test (export "test") (param $array (ref $array))
  ;; As above, but now no $array is ever created (and we are in closed world).
  ;; We can optimize this to trap.
  (drop
   (i64.load32_u (type $array)
    (local.get $array)
    (i32.const 0)
   )
  )
 )
)