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|
;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
;; RUN: wasm-opt %s --optimize-instructions --traps-never-happen -all --nominal -S -o - | filecheck %s --check-prefix TNH
;; RUN: wasm-opt %s --optimize-instructions -all --nominal -S -o - | filecheck %s --check-prefix NO_TNH
(module
;; TNH: (type $struct (struct (field (mut i32))))
;; NO_TNH: (type $struct (struct (field (mut i32))))
(type $struct (struct_subtype (field (mut i32)) data))
;; TNH: (type $void (func))
;; NO_TNH: (type $void (func))
(type $void (func))
;; TNH: (func $ref.eq (type $eqref_eqref_=>_i32) (param $a eqref) (param $b eqref) (result i32)
;; TNH-NEXT: (ref.eq
;; TNH-NEXT: (local.get $a)
;; TNH-NEXT: (local.get $b)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $ref.eq (type $eqref_eqref_=>_i32) (param $a eqref) (param $b eqref) (result i32)
;; NO_TNH-NEXT: (ref.eq
;; NO_TNH-NEXT: (ref.cast $struct
;; NO_TNH-NEXT: (local.get $a)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (ref.cast struct
;; NO_TNH-NEXT: (local.get $b)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
(func $ref.eq (param $a (ref null eq)) (param $b (ref null eq)) (result i32)
;; When traps never happen we can remove all the casts here, since they do
;; not affect the comparison of the references.
(ref.eq
;; When traps can happen we can still improve this by removing and
;; combining redundant casts.
(ref.cast struct
(ref.as_non_null
(ref.cast null $struct
(local.get $a)
)
)
)
;; Note that we can remove the non-null casts here in both modes, as the
;; ref.cast struct also checks for null.
(ref.cast struct
(ref.as_non_null
(ref.as_non_null
(local.get $b)
)
)
)
)
)
;; TNH: (func $ref.eq-no (type $eqref_eqref_anyref_=>_none) (param $a eqref) (param $b eqref) (param $any anyref)
;; TNH-NEXT: (drop
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $ref.eq-no (type $eqref_eqref_anyref_=>_none) (param $a eqref) (param $b eqref) (param $any anyref)
;; NO_TNH-NEXT: (drop
;; NO_TNH-NEXT: (ref.eq
;; NO_TNH-NEXT: (ref.cast null $struct
;; NO_TNH-NEXT: (local.get $any)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (ref.cast struct
;; NO_TNH-NEXT: (local.get $any)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
(func $ref.eq-no (param $a (ref null eq)) (param $b (ref null eq)) (param $any anyref)
;; We must leave the inputs to ref.eq of type eqref or a subtype.
(drop
(ref.eq
(ref.cast null $struct
(local.get $any) ;; *Not* an eqref!
)
(ref.as_non_null
(ref.cast struct
(ref.as_non_null
(local.get $any) ;; *Not* an eqref!
)
)
)
)
)
)
;; TNH: (func $ref.is (type $eqref_=>_i32) (param $a eqref) (result i32)
;; TNH-NEXT: (drop
;; TNH-NEXT: (ref.cast $struct
;; TNH-NEXT: (local.get $a)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 0)
;; TNH-NEXT: )
;; NO_TNH: (func $ref.is (type $eqref_=>_i32) (param $a eqref) (result i32)
;; NO_TNH-NEXT: (drop
;; NO_TNH-NEXT: (ref.cast $struct
;; NO_TNH-NEXT: (local.get $a)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 0)
;; NO_TNH-NEXT: )
(func $ref.is (param $a (ref null eq)) (result i32)
;; In this case non-nullability is enough to tell that the ref.is will
;; return 0. TNH does not help here.
(ref.is_null
(ref.cast $struct
(ref.as_non_null
(ref.cast struct
(local.get $a)
)
)
)
)
)
;; TNH: (func $ref.is_b (type $eqref_funcref_=>_i32) (param $a eqref) (param $f funcref) (result i32)
;; TNH-NEXT: (drop
;; TNH-NEXT: (ref.is_null
;; TNH-NEXT: (local.get $a)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (ref.is_null
;; TNH-NEXT: (local.get $f)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $ref.is_b (type $eqref_funcref_=>_i32) (param $a eqref) (param $f funcref) (result i32)
;; NO_TNH-NEXT: (drop
;; NO_TNH-NEXT: (ref.is_null
;; NO_TNH-NEXT: (ref.cast null $struct
;; NO_TNH-NEXT: (local.get $a)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (ref.is_null
;; NO_TNH-NEXT: (ref.cast null $void
;; NO_TNH-NEXT: (local.get $f)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
(func $ref.is_b (param $a eqref) (param $f funcref) (result i32)
;; Here we only have a cast, and no ref.as operations that force the value
;; to be non-nullable. That means we cannot remove the ref.is, but we can
;; remove the cast in TNH.
(drop
(ref.is_null
(ref.cast null $struct
(local.get $a)
)
)
)
;; It works on func references, too.
(ref.is_null
(ref.cast null $void
(local.get $f)
)
)
)
;; TNH: (func $ref.is_func (type $funcref_=>_i32) (param $a funcref) (result i32)
;; TNH-NEXT: (drop
;; TNH-NEXT: (ref.as_non_null
;; TNH-NEXT: (local.get $a)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; NO_TNH: (func $ref.is_func (type $funcref_=>_i32) (param $a funcref) (result i32)
;; NO_TNH-NEXT: (drop
;; NO_TNH-NEXT: (ref.as_non_null
;; NO_TNH-NEXT: (local.get $a)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
(func $ref.is_func (param $a funcref) (result i32)
;; The check must succeed. We can return 1 here, and drop the rest, with or
;; without TNH (in particular, TNH should not just remove the cast but not
;; return a 1).
(ref.is_func
(ref.as_func
(local.get $a)
)
)
)
;; TNH: (func $if.arm.null (type $i32_ref|$struct|_=>_none) (param $x i32) (param $ref (ref $struct))
;; TNH-NEXT: (struct.set $struct 0
;; TNH-NEXT: (block (result (ref $struct))
;; TNH-NEXT: (drop
;; TNH-NEXT: (local.get $x)
;; TNH-NEXT: )
;; TNH-NEXT: (local.get $ref)
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: (struct.set $struct 0
;; TNH-NEXT: (block (result (ref $struct))
;; TNH-NEXT: (drop
;; TNH-NEXT: (local.get $x)
;; TNH-NEXT: )
;; TNH-NEXT: (local.get $ref)
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 2)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $if.arm.null (type $i32_ref|$struct|_=>_none) (param $x i32) (param $ref (ref $struct))
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (if (result (ref null $struct))
;; NO_TNH-NEXT: (local.get $x)
;; NO_TNH-NEXT: (local.get $ref)
;; NO_TNH-NEXT: (ref.null none)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (if (result (ref null $struct))
;; NO_TNH-NEXT: (local.get $x)
;; NO_TNH-NEXT: (ref.null none)
;; NO_TNH-NEXT: (local.get $ref)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 2)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
(func $if.arm.null (param $x i32) (param $ref (ref $struct))
;; A set will trap on a null, so in tnh mode we know the null arm is not
;; executed, and the other one is.
(struct.set $struct 0
(if (result (ref null $struct))
(local.get $x)
(local.get $ref)
(ref.null none)
)
(i32.const 1)
)
(struct.set $struct 0
(if (result (ref null $struct))
(local.get $x)
(ref.null none)
(local.get $ref)
)
(i32.const 2)
)
)
;; TNH: (func $select.arm.null (type $i32_ref|$struct|_=>_none) (param $x i32) (param $ref (ref $struct))
;; TNH-NEXT: (struct.set $struct 0
;; TNH-NEXT: (block (result (ref $struct))
;; TNH-NEXT: (block
;; TNH-NEXT: (drop
;; TNH-NEXT: (ref.null none)
;; TNH-NEXT: )
;; TNH-NEXT: (drop
;; TNH-NEXT: (local.get $x)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (local.get $ref)
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: (struct.set $struct 0
;; TNH-NEXT: (block (result (ref $struct))
;; TNH-NEXT: (drop
;; TNH-NEXT: (ref.null none)
;; TNH-NEXT: )
;; TNH-NEXT: (block (result (ref $struct))
;; TNH-NEXT: (drop
;; TNH-NEXT: (local.get $x)
;; TNH-NEXT: )
;; TNH-NEXT: (local.get $ref)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 2)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $select.arm.null (type $i32_ref|$struct|_=>_none) (param $x i32) (param $ref (ref $struct))
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (select (result (ref null $struct))
;; NO_TNH-NEXT: (local.get $ref)
;; NO_TNH-NEXT: (ref.null none)
;; NO_TNH-NEXT: (local.get $x)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (select (result (ref null $struct))
;; NO_TNH-NEXT: (ref.null none)
;; NO_TNH-NEXT: (local.get $ref)
;; NO_TNH-NEXT: (local.get $x)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 2)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
(func $select.arm.null (param $x i32) (param $ref (ref $struct))
;; As above but with a select.
(struct.set $struct 0
(select (result (ref null $struct))
(local.get $ref)
(ref.null none)
(local.get $x)
)
(i32.const 1)
)
(struct.set $struct 0
(select (result (ref null $struct))
(ref.null none)
(local.get $ref)
(local.get $x)
)
(i32.const 2)
)
)
;; TNH: (func $select.arm.null.effects (type $void)
;; TNH-NEXT: (local $0 (ref $struct))
;; TNH-NEXT: (local $1 (ref $struct))
;; TNH-NEXT: (struct.set $struct 0
;; TNH-NEXT: (block (result (ref $struct))
;; TNH-NEXT: (local.set $0
;; TNH-NEXT: (call $get-ref)
;; TNH-NEXT: )
;; TNH-NEXT: (block
;; TNH-NEXT: (drop
;; TNH-NEXT: (call $get-null)
;; TNH-NEXT: )
;; TNH-NEXT: (drop
;; TNH-NEXT: (call $get-i32)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (local.get $0)
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: (struct.set $struct 0
;; TNH-NEXT: (block (result (ref $struct))
;; TNH-NEXT: (drop
;; TNH-NEXT: (call $get-null)
;; TNH-NEXT: )
;; TNH-NEXT: (block (result (ref $struct))
;; TNH-NEXT: (local.set $1
;; TNH-NEXT: (call $get-ref)
;; TNH-NEXT: )
;; TNH-NEXT: (drop
;; TNH-NEXT: (call $get-i32)
;; TNH-NEXT: )
;; TNH-NEXT: (local.get $1)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 2)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $select.arm.null.effects (type $void)
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (select (result (ref null $struct))
;; NO_TNH-NEXT: (call $get-ref)
;; NO_TNH-NEXT: (call $get-null)
;; NO_TNH-NEXT: (call $get-i32)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (select (result (ref null $struct))
;; NO_TNH-NEXT: (call $get-null)
;; NO_TNH-NEXT: (call $get-ref)
;; NO_TNH-NEXT: (call $get-i32)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 2)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
(func $select.arm.null.effects
;; As above but there are conflicting effects and we must add a local when
;; we optimize.
(struct.set $struct 0
(select (result (ref null $struct))
(call $get-ref)
(call $get-null)
(call $get-i32)
)
(i32.const 1)
)
(struct.set $struct 0
(select (result (ref null $struct))
(call $get-null)
(call $get-ref)
(call $get-i32)
)
(i32.const 2)
)
)
;; TNH: (func $null.arm.null.effects (type $void)
;; TNH-NEXT: (block ;; (replaces something unreachable we can't emit)
;; TNH-NEXT: (drop
;; TNH-NEXT: (block (result nullref)
;; TNH-NEXT: (drop
;; TNH-NEXT: (ref.as_non_null
;; TNH-NEXT: (ref.null none)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (block (result nullref)
;; TNH-NEXT: (drop
;; TNH-NEXT: (call $get-i32)
;; TNH-NEXT: )
;; TNH-NEXT: (ref.null none)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (drop
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $null.arm.null.effects (type $void)
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (select (result (ref null $struct))
;; NO_TNH-NEXT: (ref.as_non_null
;; NO_TNH-NEXT: (ref.null none)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (ref.null none)
;; NO_TNH-NEXT: (call $get-i32)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
(func $null.arm.null.effects
;; Verify we do not error on a null reference in a select, even if cast to
;; non-null.
(struct.set $struct 0
(select (result (ref null $struct))
(ref.as_non_null
(ref.null none)
)
(ref.null none)
(call $get-i32)
)
(i32.const 1)
)
)
;; TNH: (func $set-get-cast (type $structref_=>_none) (param $ref structref)
;; TNH-NEXT: (drop
;; TNH-NEXT: (struct.get $struct 0
;; TNH-NEXT: (ref.cast $struct
;; TNH-NEXT: (local.get $ref)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (struct.set $struct 0
;; TNH-NEXT: (ref.cast $struct
;; TNH-NEXT: (local.get $ref)
;; TNH-NEXT: )
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: (struct.set $struct 0
;; TNH-NEXT: (ref.cast null $struct
;; TNH-NEXT: (local.get $ref)
;; TNH-NEXT: )
;; TNH-NEXT: (block (result i32)
;; TNH-NEXT: (return)
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $set-get-cast (type $structref_=>_none) (param $ref structref)
;; NO_TNH-NEXT: (drop
;; NO_TNH-NEXT: (struct.get $struct 0
;; NO_TNH-NEXT: (ref.cast $struct
;; NO_TNH-NEXT: (local.get $ref)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (ref.cast null $struct
;; NO_TNH-NEXT: (local.get $ref)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (struct.set $struct 0
;; NO_TNH-NEXT: (ref.cast null $struct
;; NO_TNH-NEXT: (local.get $ref)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (block (result i32)
;; NO_TNH-NEXT: (return)
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
(func $set-get-cast (param $ref (ref null struct))
;; A nullable cast flowing into a place that traps on null can become a
;; non-nullable cast.
(drop
(struct.get $struct 0
(ref.cast null $struct
(local.get $ref)
)
)
)
;; Ditto for a set, at least in traps-happen mode.
;; TODO handle non-TNH as well, but we need to be careful of effects in
;; other children.
(struct.set $struct 0
(ref.cast null $struct
(local.get $ref)
)
(i32.const 1)
)
;; Even in TNH mode, a child with an effect of control flow transfer
;; prevents us from optimizing - if the parent is not necessarily reached,
;; we cannot infer the child won't trap.
(struct.set $struct 0
(ref.cast null $struct
(local.get $ref)
)
(block (result i32)
;; This block has type i32, to check that we don't just look for
;; unreachable. We must scan for any transfer of control flow in the
;; child of the struct.set.
(return)
(i32.const 1)
)
)
)
;; TNH: (func $cast-if-null (type $none_=>_ref|$struct|) (result (ref $struct))
;; TNH-NEXT: (block ;; (replaces something unreachable we can't emit)
;; TNH-NEXT: (drop
;; TNH-NEXT: (block
;; TNH-NEXT: (drop
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $cast-if-null (type $none_=>_ref|$struct|) (result (ref $struct))
;; NO_TNH-NEXT: (drop
;; NO_TNH-NEXT: (if (result (ref none))
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: (unreachable)
;; NO_TNH-NEXT: (ref.as_non_null
;; NO_TNH-NEXT: (ref.null none)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (unreachable)
;; NO_TNH-NEXT: )
(func $cast-if-null (result (ref $struct))
;; We can remove the unreachable arm of the if here in TNH mode. While doing
;; so we must refinalize properly or else we'll hit an error in pass-debug
;; mode.
(ref.cast $struct
(if (result (ref none))
(i32.const 1)
(unreachable)
(ref.as_non_null
(ref.null none)
)
)
)
)
;; TNH: (func $cast-if-null-flip (type $none_=>_ref|$struct|) (result (ref $struct))
;; TNH-NEXT: (block ;; (replaces something unreachable we can't emit)
;; TNH-NEXT: (drop
;; TNH-NEXT: (block
;; TNH-NEXT: (drop
;; TNH-NEXT: (i32.const 1)
;; TNH-NEXT: )
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; TNH-NEXT: )
;; NO_TNH: (func $cast-if-null-flip (type $none_=>_ref|$struct|) (result (ref $struct))
;; NO_TNH-NEXT: (drop
;; NO_TNH-NEXT: (if (result (ref none))
;; NO_TNH-NEXT: (i32.const 1)
;; NO_TNH-NEXT: (ref.as_non_null
;; NO_TNH-NEXT: (ref.null none)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (unreachable)
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: )
;; NO_TNH-NEXT: (unreachable)
;; NO_TNH-NEXT: )
(func $cast-if-null-flip (result (ref $struct))
;; As above but with arms flipped.
(ref.cast $struct
(if (result (ref none))
(i32.const 1)
(ref.as_non_null
(ref.null none)
)
(unreachable)
)
)
)
;; Helper functions.
;; TNH: (func $get-i32 (type $none_=>_i32) (result i32)
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; NO_TNH: (func $get-i32 (type $none_=>_i32) (result i32)
;; NO_TNH-NEXT: (unreachable)
;; NO_TNH-NEXT: )
(func $get-i32 (result i32)
(unreachable)
)
;; TNH: (func $get-ref (type $none_=>_ref|$struct|) (result (ref $struct))
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; NO_TNH: (func $get-ref (type $none_=>_ref|$struct|) (result (ref $struct))
;; NO_TNH-NEXT: (unreachable)
;; NO_TNH-NEXT: )
(func $get-ref (result (ref $struct))
(unreachable)
)
;; TNH: (func $get-null (type $none_=>_nullref) (result nullref)
;; TNH-NEXT: (unreachable)
;; TNH-NEXT: )
;; NO_TNH: (func $get-null (type $none_=>_nullref) (result nullref)
;; NO_TNH-NEXT: (unreachable)
;; NO_TNH-NEXT: )
(func $get-null (result (ref null none))
(unreachable)
)
)
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