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;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
;; RUN: foreach %s %t wasm-opt --optimize-instructions --ignore-implicit-traps --enable-reference-types --enable-gc -S -o - \
;; RUN: | filecheck %s
;; Also test trapsNeverHappen
;; RUN: foreach %s %t wasm-opt --optimize-instructions --traps-never-happen --enable-reference-types --enable-gc -S -o - \
;; RUN: | filecheck %s --check-prefix TNH
(module
;; CHECK: (type $parent (sub (struct (field i32))))
;; TNH: (type $parent (sub (struct (field i32))))
(type $parent (sub (struct (field i32))))
;; CHECK: (type $child (sub $parent (struct (field i32) (field f64))))
;; TNH: (type $child (sub $parent (struct (field i32) (field f64))))
(type $child (sub $parent (struct (field i32) (field f64))))
;; CHECK: (type $other (struct (field i64) (field f32)))
;; TNH: (type $other (struct (field i64) (field f32)))
(type $other (struct (field i64) (field f32)))
;; CHECK: (func $foo (type $3)
;; CHECK-NEXT: )
;; TNH: (func $foo (type $3)
;; TNH-NEXT: )
(func $foo)
;; CHECK: (func $ref-cast-iit (type $4) (param $parent (ref $parent)) (param $child (ref $child)) (param $other (ref $other))
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $parent)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $child)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.cast (ref $child)
;; CHECK-NEXT: (local.get $parent)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (block (result (ref none))
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $child)
;; CHECK-NEXT: )
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; TNH: (func $ref-cast-iit (type $4) (param $parent (ref $parent)) (param $child (ref $child)) (param $other (ref $other))
;; TNH-NEXT: (drop
;; TNH-NEXT: (local.get $parent)
;; TNH-NEXT: )
;; TNH-NEXT: (drop
;; TNH-NEXT: (local.get $child)
;; TNH-NEXT: )
;; TNH-NEXT: (drop
;; TNH-NEXT: (ref.cast (ref $child)
;; TNH-NEXT: (local.get $parent)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (drop
;; TNH-NEXT: (block (result (ref none))
;; TNH-NEXT: (drop
;; TNH-NEXT: (local.get $child)
;; TNH-NEXT: )
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: )
(func $ref-cast-iit
(param $parent (ref $parent))
(param $child (ref $child))
(param $other (ref $other))
;; a cast of parent to parent. We can optimize this as the new type will be
;; valid.
(drop
(ref.cast (ref $parent)
(local.get $parent)
)
)
;; a cast of child to a supertype: again, we replace with a valid type.
(drop
(ref.cast (ref $parent)
(local.get $child)
)
)
;; a cast of parent to a subtype: we cannot replace the original heap type
;; $child with one that is not equal or more specific, like $parent, so we
;; cannot optimize here.
(drop
(ref.cast (ref $child)
(local.get $parent)
)
)
;; a cast of child to an unrelated type: it will trap anyhow
(drop
(ref.cast (ref $other)
(local.get $child)
)
)
)
;; CHECK: (func $ref-cast-iit-bad (type $5) (param $parent (ref $parent))
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (block (result (ref $parent))
;; CHECK-NEXT: (call $foo)
;; CHECK-NEXT: (local.get $parent)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (block ;; (replaces unreachable RefCast we can't emit)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; TNH: (func $ref-cast-iit-bad (type $5) (param $parent (ref $parent))
;; TNH-NEXT: (drop
;; TNH-NEXT: (block (result (ref $parent))
;; TNH-NEXT: (call $foo)
;; TNH-NEXT: (local.get $parent)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (drop
;; TNH-NEXT: (block ;; (replaces unreachable RefCast we can't emit)
;; TNH-NEXT: (drop
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: )
(func $ref-cast-iit-bad
(param $parent (ref $parent))
;; optimizing this cast away requires reordering.
(drop
(ref.cast (ref $parent)
(block (result (ref $parent))
(call $foo)
(local.get $parent)
)
)
)
;; ignore unreachability
(drop
(ref.cast (ref null $parent)
(unreachable)
)
)
)
;; CHECK: (func $ref-eq-ref-cast (type $6) (param $x eqref)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; TNH: (func $ref-eq-ref-cast (type $6) (param $x eqref)
;; TNH-NEXT: (drop
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: )
(func $ref-eq-ref-cast (param $x eqref)
;; we can look through a ref.cast null if we ignore traps
(drop
(ref.eq
(local.get $x)
(ref.cast (ref null $parent)
(local.get $x)
)
)
)
)
;; CHECK: (func $set-of-as-non-null (type $7) (param $x anyref)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; TNH: (func $set-of-as-non-null (type $7) (param $x anyref)
;; TNH-NEXT: (local.set $x
;; TNH-NEXT: (local.get $x)
;; TNH-NEXT: )
;; TNH-NEXT: )
(func $set-of-as-non-null (param $x anyref)
;; As we ignore such traps, we can remove the ref.as here.
(local.set $x
(ref.as_non_null
(local.get $x)
)
)
)
)
(module
(rec
;; CHECK: (rec
;; CHECK-NEXT: (type $A (sub (struct)))
;; TNH: (rec
;; TNH-NEXT: (type $A (sub (struct)))
(type $A (sub (struct )))
;; CHECK: (type $B (sub $A (struct (field (ref null $A)))))
;; TNH: (type $B (sub $A (struct (field (ref null $A)))))
(type $B (sub $A (struct (field (ref null $A)))))
;; CHECK: (type $C (sub $B (struct (field (ref null $D)))))
;; TNH: (type $C (sub $B (struct (field (ref null $D)))))
(type $C (sub $B (struct (field (ref null $D)))))
;; CHECK: (type $D (sub $A (struct)))
;; TNH: (type $D (sub $A (struct)))
(type $D (sub $A (struct )))
)
;; CHECK: (func $test (type $4) (param $C (ref $C)) (result anyref)
;; CHECK-NEXT: (struct.get $C 0
;; CHECK-NEXT: (local.get $C)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; TNH: (func $test (type $4) (param $C (ref $C)) (result anyref)
;; TNH-NEXT: (struct.get $C 0
;; TNH-NEXT: (local.get $C)
;; TNH-NEXT: )
;; TNH-NEXT: )
(func $test (param $C (ref $C)) (result anyref)
(struct.get $B 0
(ref.cast (ref $B) ;; Try to cast a $C to its parent, $B. That always
;; works, so the cast can be removed.
;; Then once the cast is removed, the outer struct.get
;; will have a reference with a different type,
;; making it a (struct.get $C ..) instead of $B.
;; But $B and $C have different types on field 0, and
;; so the struct.get must be refinalized so the node
;; has the expected type.
(local.get $C)
)
)
)
)
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