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|
;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
;; RUN: wasm-opt %s --simplify-locals -all -S -o - \
;; RUN: | filecheck %s
;; RUN: wasm-opt %s --simplify-locals -all --nominal -S -o - \
;; RUN: | filecheck %s --check-prefix=NOMNL
(module
;; CHECK: (type $struct (struct (field (mut i32))))
;; NOMNL: (type $struct (struct_subtype (field (mut i32)) data))
(type $struct (struct (field (mut i32))))
;; CHECK: (type $struct-immutable (struct (field i32)))
;; NOMNL: (type $struct-immutable (struct_subtype (field i32) data))
(type $struct-immutable (struct (field i32)))
;; CHECK: (type $B (struct (field dataref)))
;; CHECK: (type $A (struct (field (ref null data))))
;; NOMNL: (type $A (struct_subtype (field (ref null data)) data))
(type $A (struct_subtype (field (ref null data)) data))
;; $B is a subtype of $A, and its field has a more refined type (it is non-
;; nullable).
;; NOMNL: (type $B (struct_subtype (field dataref) $A))
(type $B (struct_subtype (field (ref data)) $A))
;; Writes to heap objects cannot be reordered with reads.
;; CHECK: (func $no-reorder-past-write (param $x (ref $struct)) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (struct.get $struct 0
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (struct.set $struct 0
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: (i32.const 42)
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; NOMNL: (func $no-reorder-past-write (type $ref|$struct|_=>_i32) (param $x (ref $struct)) (result i32)
;; NOMNL-NEXT: (local $temp i32)
;; NOMNL-NEXT: (local.set $temp
;; NOMNL-NEXT: (struct.get $struct 0
;; NOMNL-NEXT: (local.get $x)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
;; NOMNL-NEXT: (struct.set $struct 0
;; NOMNL-NEXT: (local.get $x)
;; NOMNL-NEXT: (i32.const 42)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: (local.get $temp)
;; NOMNL-NEXT: )
(func $no-reorder-past-write (param $x (ref $struct)) (result i32)
(local $temp i32)
(local.set $temp
(struct.get $struct 0
(local.get $x)
)
)
(struct.set $struct 0
(local.get $x)
(i32.const 42)
)
(local.get $temp)
)
;; CHECK: (func $reorder-past-write-if-immutable (param $x (ref $struct)) (param $y (ref $struct-immutable)) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (struct.set $struct 0
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: (i32.const 42)
;; CHECK-NEXT: )
;; CHECK-NEXT: (struct.get $struct-immutable 0
;; CHECK-NEXT: (local.get $y)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; NOMNL: (func $reorder-past-write-if-immutable (type $ref|$struct|_ref|$struct-immutable|_=>_i32) (param $x (ref $struct)) (param $y (ref $struct-immutable)) (result i32)
;; NOMNL-NEXT: (local $temp i32)
;; NOMNL-NEXT: (nop)
;; NOMNL-NEXT: (struct.set $struct 0
;; NOMNL-NEXT: (local.get $x)
;; NOMNL-NEXT: (i32.const 42)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: (struct.get $struct-immutable 0
;; NOMNL-NEXT: (local.get $y)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
(func $reorder-past-write-if-immutable (param $x (ref $struct)) (param $y (ref $struct-immutable)) (result i32)
(local $temp i32)
(local.set $temp
(struct.get $struct-immutable 0
(local.get $y)
)
)
(struct.set $struct 0
(local.get $x)
(i32.const 42)
)
(local.get $temp)
)
;; CHECK: (func $unreachable-struct.get (param $x (ref $struct)) (param $y (ref $struct-immutable)) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (local.tee $temp
;; CHECK-NEXT: (block ;; (replaces something unreachable we can't emit)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (struct.set $struct 0
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: (i32.const 42)
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; NOMNL: (func $unreachable-struct.get (type $ref|$struct|_ref|$struct-immutable|_=>_i32) (param $x (ref $struct)) (param $y (ref $struct-immutable)) (result i32)
;; NOMNL-NEXT: (local $temp i32)
;; NOMNL-NEXT: (local.tee $temp
;; NOMNL-NEXT: (block ;; (replaces something unreachable we can't emit)
;; NOMNL-NEXT: (drop
;; NOMNL-NEXT: (unreachable)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
;; NOMNL-NEXT: (struct.set $struct 0
;; NOMNL-NEXT: (local.get $x)
;; NOMNL-NEXT: (i32.const 42)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: (local.get $temp)
;; NOMNL-NEXT: )
(func $unreachable-struct.get (param $x (ref $struct)) (param $y (ref $struct-immutable)) (result i32)
(local $temp i32)
;; As above, but the get's ref is unreachable. This tests we do not hit an
;; assertion on the get's type not having a heap type (as we depend on
;; finding the heap type there in the reachable case).
;; We simply do not handle this case, leaving it for DCE.
(local.set $temp
(struct.get $struct-immutable 0
(unreachable)
)
)
(struct.set $struct 0
(local.get $x)
(i32.const 42)
)
(local.get $temp)
)
;; CHECK: (func $no-block-values-if-br_on
;; CHECK-NEXT: (local $temp anyref)
;; CHECK-NEXT: (block $block
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (br_on_null $block
;; CHECK-NEXT: (ref.null any)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (ref.null any)
;; CHECK-NEXT: )
;; CHECK-NEXT: (br $block)
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (ref.null any)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; NOMNL: (func $no-block-values-if-br_on (type $none_=>_none)
;; NOMNL-NEXT: (local $temp anyref)
;; NOMNL-NEXT: (block $block
;; NOMNL-NEXT: (drop
;; NOMNL-NEXT: (br_on_null $block
;; NOMNL-NEXT: (ref.null any)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
;; NOMNL-NEXT: (local.set $temp
;; NOMNL-NEXT: (ref.null any)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: (br $block)
;; NOMNL-NEXT: (local.set $temp
;; NOMNL-NEXT: (ref.null any)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
;; NOMNL-NEXT: (drop
;; NOMNL-NEXT: (ref.as_non_null
;; NOMNL-NEXT: (local.get $temp)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
(func $no-block-values-if-br_on
(local $temp (ref null any))
(block $block
(drop
;; This br_on should inhibit trying to create a block return value for
;; this block. Aside from the br_on, it looks correct, i.e., we have a
;; break with a set before it, and a set before the end of the block. Due
;; to the br_on's presence, the pass should not do anything to this
;; function.
;;
;; TODO: support br_on in this optimization eventually, but the variable
;; possible return values and sent values make that nontrivial.
(br_on_null $block
(ref.null any)
)
)
(local.set $temp
(ref.null any)
)
(br $block)
(local.set $temp
(ref.null any)
)
)
;; Attempt to use the local that the pass will try to move to a block return
;; value, to cause the optimization to try to run.
(drop
(ref.as_non_null
(local.get $temp)
)
)
)
;; CHECK: (func $needs-refinalize (param $b (ref $B)) (result anyref)
;; CHECK-NEXT: (local $a (ref null $A))
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (struct.get $B 0
;; CHECK-NEXT: (local.get $b)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; NOMNL: (func $needs-refinalize (type $ref|$B|_=>_anyref) (param $b (ref $B)) (result anyref)
;; NOMNL-NEXT: (local $a (ref null $A))
;; NOMNL-NEXT: (nop)
;; NOMNL-NEXT: (struct.get $B 0
;; NOMNL-NEXT: (local.get $b)
;; NOMNL-NEXT: )
;; NOMNL-NEXT: )
(func $needs-refinalize (param $b (ref $B)) (result anyref)
(local $a (ref null $A))
(local.set $a
(local.get $b)
)
;; This begins as a struct.get of $A, but after we move the set's value onto
;; the get, we'll be reading from $B. $B's field has a more refined type, so
;; we must update the type of the struct.get using refinalize.
(struct.get $A 0
(local.get $a)
)
)
)
|
