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|
;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited.
;; NOTE: This test was ported using port_passes_tests_to_lit.py and could be cleaned up.
;; RUN: foreach %s %t wasm-opt --remove-unused-brs --all-features -S -o - | filecheck %s
(module
;; CHECK: (type $vector (array (mut i32)))
(type $vector (array (mut i32)))
;; CHECK: (type $struct (struct (field (ref null $vector))))
(type $struct (struct (field (ref null $vector))))
;; CHECK: (type $2 (func (param i32)))
;; CHECK: (type $3 (func (result (ref null $struct))))
;; CHECK: (type $4 (func (result f64)))
;; CHECK: (type $5 (func (result i32)))
;; CHECK: (type $6 (func (param i32) (result funcref)))
;; CHECK: (type $7 (func (param funcref)))
;; CHECK: (type $8 (func))
;; CHECK: (type $9 (func (param funcref) (result funcref)))
;; CHECK: (type $10 (func (result funcref)))
;; CHECK: (import "out" "log" (func $log (type $2) (param i32)))
(import "out" "log" (func $log (param i32)))
;; CHECK: (elem declare func $br_on_non_null $br_on_null $i32_=>_none $none_=>_i32)
;; CHECK: (func $foo (type $3) (result (ref null $struct))
;; CHECK-NEXT: (if (result (ref null $struct))
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (struct.new $struct
;; CHECK-NEXT: (array.new_default $vector
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (ref.null none)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $foo (result (ref null $struct))
(if (result (ref null $struct))
(i32.const 1)
(then
(struct.new $struct
;; regression test for computing the cost of an array.new_default, which
;; lacks the optional field "init"
(array.new_default $vector
(i32.const 1)
)
)
)
(else
(ref.null $struct)
)
)
)
;; CHECK: (func $test-prefinalize (type $4) (result f64)
;; CHECK-NEXT: (loop $loop (result f64)
;; CHECK-NEXT: (if (result f64)
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (f64.const 0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (block $block (result f64)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (br_if $loop
;; CHECK-NEXT: (i32.eqz
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $test-prefinalize (result f64)
(loop $loop (result f64)
(block $block (result f64)
(drop
(br_if $block
(f64.const 0)
(i32.const 1)
)
)
(if
(i32.const 0)
(then
(unreachable)
)
)
;; this will be moved from $block into the if right before it. we must be
;; careful to properly finalize() things, as if we finalize the block too
;; early - before the if - then the block ends in a none type, which is
;; invalid.
(br $loop)
)
)
)
;; CHECK: (func $none_=>_i32 (type $5) (result i32)
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
(func $none_=>_i32 (result i32)
(unreachable)
)
;; CHECK: (func $i32_=>_none (type $2) (param $0 i32)
;; CHECK-NEXT: )
(func $i32_=>_none (param i32)
)
;; CHECK: (func $selectify (type $6) (param $x i32) (result funcref)
;; CHECK-NEXT: (select (result (ref func))
;; CHECK-NEXT: (ref.func $none_=>_i32)
;; CHECK-NEXT: (ref.func $i32_=>_none)
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $selectify (param $x i32) (result funcref)
;; this if has arms with different function types, for which funcref is the
;; LUB
(if (result funcref)
(local.get $x)
(then
(ref.func $none_=>_i32)
)
(else
(ref.func $i32_=>_none)
)
)
)
;; CHECK: (func $br_on_null (type $7) (param $x funcref)
;; CHECK-NEXT: (block $null
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (block
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.null nofunc)
;; CHECK-NEXT: )
;; CHECK-NEXT: (br $null)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.func $br_on_null)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (br_on_null $null
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $br_on_null (param $x funcref)
(block $null
;; A null reference to bottom is definitely null, and the br is always taken.
(drop
(br_on_null $null (ref.null nofunc))
)
;; On the other hand, if we know the input is not null, the branch will never
;; be taken.
(drop
(br_on_null $null (ref.func $br_on_null))
)
;; If we don't know whether the input is null, we can't optimize.
(drop
(br_on_null $null (local.get $x))
)
)
)
;; CHECK: (func $br_on_null-fallthrough (type $8)
;; CHECK-NEXT: (local $x funcref)
;; CHECK-NEXT: (block $null
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (block
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.tee $x
;; CHECK-NEXT: (ref.null nofunc)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (br $null)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (local.tee $x
;; CHECK-NEXT: (ref.func $br_on_null)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $br_on_null-fallthrough
;; This is the same as above, but now the necessary type information comes
;; from fallthrough values.
(local $x funcref)
(block $null
;; Definitely taken.
(drop
(br_on_null $null (local.tee $x (ref.null nofunc)))
)
;; Definitely not taken. Optimizable, but still requires a cast for validity.
(drop
(br_on_null $null (local.tee $x (ref.func $br_on_null)))
)
)
)
;; CHECK: (func $br_on_non_null (type $9) (param $x funcref) (result funcref)
;; CHECK-NEXT: (block $non-null (result (ref func))
;; CHECK-NEXT: (br $non-null
;; CHECK-NEXT: (ref.func $br_on_non_null)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.null nofunc)
;; CHECK-NEXT: )
;; CHECK-NEXT: (br_on_non_null $non-null
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $br_on_non_null (param $x funcref) (result funcref)
(block $non-null (result (ref func))
;; A non-null reference is not null, and the br is always taken.
(br_on_non_null $non-null
(ref.func $br_on_non_null)
)
;; On the other hand, if we know the input is null, the branch will never be
;; taken.
(br_on_non_null $non-null
(ref.null nofunc)
)
;; If we don't know whether the input is null, we can't optimize.
(br_on_non_null $non-null
(local.get $x)
)
(unreachable)
)
)
;; CHECK: (func $br_on_non_null-fallthrough (type $10) (result funcref)
;; CHECK-NEXT: (local $x funcref)
;; CHECK-NEXT: (block $non-null (result (ref func))
;; CHECK-NEXT: (br $non-null
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (local.tee $x
;; CHECK-NEXT: (ref.func $br_on_non_null)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.tee $x
;; CHECK-NEXT: (ref.null nofunc)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $br_on_non_null-fallthrough (result funcref)
;; Same as above, but now using fallthrough values.
(local $x funcref)
(block $non-null (result (ref func))
;; Definitely taken. Requires cast.
(br_on_non_null $non-null
(local.tee $x (ref.func $br_on_non_null))
)
;; Definitely not taken.
(br_on_non_null $non-null
(local.tee $x (ref.null nofunc))
)
(unreachable)
)
)
)
|
