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|
;; NOTE: Assertions have been generated by update_lit_checks.py and should not be edited.
;; RUN: wasm-opt %s --code-pushing -all -S -o - | filecheck %s
(module
;; CHECK: (import "binaryen-intrinsics" "call.without.effects" (func $call.without.effects (type $2) (param i32 funcref) (result i32)))
(import "binaryen-intrinsics" "call.without.effects" (func $call.without.effects (param i32 funcref) (result i32)))
;; CHECK: (func $if-nop (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-nop (param $p i32)
(local $x i32)
;; The set local is not used in any if arm; do nothing.
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(nop)
)
)
)
;; CHECK: (func $if-nop-nop (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-nop-nop (param $p i32)
(local $x i32)
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(nop)
)
(else
(nop) ;; add a nop here compared to the last testcase (no output change)
)
)
)
;; CHECK: (func $if-use (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-use (param $p i32)
(local $x i32)
;; The set local is used in one arm and nowhere else; push it there.
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(drop (local.get $x))
)
)
)
;; CHECK: (func $if-use-nop (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-use-nop (param $p i32)
(local $x i32)
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(drop (local.get $x))
)
(else
(nop) ;; add a nop here compared to the last testcase (no output change)
)
)
)
;; CHECK: (func $if-else-use (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-else-use (param $p i32)
(local $x i32)
;; The set local is used in one arm and nowhere else; push it there.
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(nop)
)
(else
(drop (local.get $x))
)
)
)
;; CHECK: (func $unpushed-interference (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $y i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.set $y
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $unpushed-interference (param $p i32)
(local $x i32)
(local $y i32)
(local.set $x (i32.const 1))
;; This set is not pushed (as it is not used in the if) and it will then
;; prevent the previous set of $x from being pushed, since we can't push a
;; set of $x past a get of it.
(local.set $y (local.get $x))
(if
(local.get $p)
(then
(drop (local.get $x))
)
)
)
;; CHECK: (func $if-use-use (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-use-use (param $p i32)
(local $x i32)
;; The set local is used in both arms, so we can't do anything.
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(drop (local.get $x))
)
(else
(drop (local.get $x))
)
)
)
;; CHECK: (func $if-use-after (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-use-after (param $p i32)
(local $x i32)
;; The use after the if prevents optimization.
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(drop (local.get $x))
)
)
(drop (local.get $x))
)
;; CHECK: (func $if-use-after-nop (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-use-after-nop (param $p i32)
(local $x i32)
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(drop (local.get $x))
)
(else
(nop) ;; add a nop here compared to the last testcase (no output change)
)
)
(drop (local.get $x))
)
;; CHECK: (func $if-else-use-after (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-else-use-after (param $p i32)
(local $x i32)
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(nop)
)
(else
(drop (local.get $x)) ;; now the use in the if is in the else arm
)
)
(drop (local.get $x))
)
;; CHECK: (func $if-use-after-unreachable (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (return)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-use-after-unreachable (param $p i32)
(local $x i32)
;; A use after the if is ok as the other arm is unreachable.
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(drop (local.get $x))
)
(else
(return)
)
)
(drop (local.get $x))
)
;; CHECK: (func $if-use-after-unreachable-else (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (return)
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-use-after-unreachable-else (param $p i32)
(local $x i32)
(local.set $x (i32.const 1))
(if
(local.get $p)
(then
(return) ;; as above, but with arms flipped
)
(else
(drop (local.get $x))
)
)
(drop (local.get $x))
)
;; CHECK: (func $optimize-many (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $y i32)
;; CHECK-NEXT: (local $z i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.set $z
;; CHECK-NEXT: (i32.const 3)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $z)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (local.set $y
;; CHECK-NEXT: (i32.const 2)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $y)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $optimize-many (param $p i32)
(local $x i32)
(local $y i32)
(local $z i32)
;; Multiple things we can push, to various arms.
(local.set $x (i32.const 1))
(local.set $y (i32.const 2))
(local.set $z (i32.const 3))
(if
(local.get $p)
(then
(block
(drop (local.get $x))
(drop (local.get $z))
)
)
(else
(drop (local.get $y))
)
)
)
;; CHECK: (func $past-other (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $t i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (i32.const 2)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (local.get $t)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $past-other (param $p i32)
(local $x i32)
(local $t i32)
;; We can push this past the drop after it.
(local.set $x (local.get $t))
(drop (i32.const 2))
(if
(local.get $p)
(then
(drop (local.get $x))
)
)
)
;; CHECK: (func $past-other-no (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $t i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (local.get $t)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.tee $t
;; CHECK-NEXT: (i32.const 2)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $past-other-no (param $p i32)
(local $x i32)
(local $t i32)
;; We cannot push this due to the tee, which interferes with us.
(local.set $x (local.get $t))
(drop (local.tee $t (i32.const 2)))
(if
(local.get $p)
(then
(drop (local.get $x))
)
)
)
;; CHECK: (func $past-condition-no (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $t i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (local.get $t)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.tee $t
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: )
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $past-condition-no (param $p i32)
(local $x i32)
(local $t i32)
;; We cannot push this due to the tee in the if condition.
(local.set $x (local.get $t))
(if
(local.tee $t (local.get $p))
(then
(drop (local.get $x))
)
)
)
;; CHECK: (func $past-condition-no-2 (type $3)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $t i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (local.get $t)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $past-condition-no-2
(local $x i32)
(local $t i32)
;; We cannot push this due to the read of $x in the if condition.
(local.set $x (local.get $t))
(if
(local.get $x)
(then
(drop (local.get $x))
)
)
)
;; CHECK: (func $past-condition-no-3 (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $t i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (local.get $t)
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.tee $x
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: )
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $past-condition-no-3 (param $p i32)
(local $x i32)
(local $t i32)
;; We cannot push this due to the write of $x in the if condition.
(local.set $x (local.get $t))
(if
(local.tee $x (local.get $p))
(then
(drop (local.get $x))
)
)
)
;; CHECK: (func $if-condition-return (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (block (result i32)
;; CHECK-NEXT: (return)
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: )
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-condition-return (param $p i32)
(local $x i32)
(local.set $x (i32.const 1))
(if
(block (result i32)
(return) ;; This return does not prevent us from optimizing; if it
;; happens then we don't need the local.set to execute
;; anyhow.
(local.get $p)
)
(then
(drop (local.get $x))
)
)
)
;; CHECK: (func $if-condition-break-used (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (block $out
;; CHECK-NEXT: (if
;; CHECK-NEXT: (block (result i32)
;; CHECK-NEXT: (br $out)
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: )
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (return)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $if-condition-break-used (param $p i32)
(local $x i32)
(local.set $x (i32.const 1))
;; As above, but the return is replaced with a break. The break goes to a
;; location with a use of the local, which prevents optimization.
(block $out
(if
(block (result i32)
(br $out)
(local.get $p)
)
(then
(drop (local.get $x))
)
)
(return)
)
(drop (local.get $x))
)
;; CHECK: (func $one-push-prevents-another (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $y i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (local.set $y
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $y)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $one-push-prevents-another (param $p i32)
(local $x i32)
(local $y i32)
;; We will push $y into one arm, and as a result both arms will have a get
;; of $x, which prevents pushing $x.
(local.set $x (i32.const 1))
(local.set $y (local.get $x))
(if
(local.get $p)
(then
(drop (local.get $x))
)
(else
(drop (local.get $y))
)
)
)
;; CHECK: (func $one-push-prevents-another-flipped (type $0) (param $p i32)
;; CHECK-NEXT: (local $x i32)
;; CHECK-NEXT: (local $y i32)
;; CHECK-NEXT: (local.set $x
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: )
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $y
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $y)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $x)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $one-push-prevents-another-flipped (param $p i32)
(local $x i32)
(local $y i32)
;; As above but with if arms flipped. The result should be similar, with
;; only $y pushed.
(local.set $x (i32.const 1))
(local.set $y (local.get $x))
(if
(local.get $p)
(then
(drop (local.get $y))
)
(else
(drop (local.get $x))
)
)
)
;; CHECK: (func $sink-call (type $1) (param $p i32) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (call $call.without.effects
;; CHECK-NEXT: (i32.const 1234)
;; CHECK-NEXT: (ref.func $sink-call)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (return
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
(func $sink-call (param $p i32) (result i32)
(local $temp i32)
;; This local has a call, but the call is an intrinsic indicating no
;; effects, so it is safe to sink into the if.
(local.set $temp
(call $call.without.effects
(i32.const 1234)
(ref.func $sink-call)
)
)
(if
(local.get $p)
(then
(return
(local.get $temp)
)
)
)
(i32.const 0)
)
;; CHECK: (func $no-sink-call (type $1) (param $p i32) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (call $call.without.effects
;; CHECK-NEXT: (i32.const 1234)
;; CHECK-NEXT: (ref.func $no-sink-call)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (return
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
(func $no-sink-call (param $p i32) (result i32)
(local $temp i32)
;; As above, but now after the if we have a get of the temp local, so we
;; cannot sink. This + the previous testcase show we scan for such local
;; uses in exactly the right places.
(local.set $temp
(call $call.without.effects
(i32.const 1234)
(ref.func $no-sink-call)
)
)
(if
(local.get $p)
(then
(return
(local.get $temp)
)
)
)
(local.get $temp) ;; this line changed.
)
;; CHECK: (func $no-sink-call-2 (type $1) (param $p i32) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (call $call.without.effects
;; CHECK-NEXT: (i32.const 1234)
;; CHECK-NEXT: (ref.func $no-sink-call-2)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (return
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
(func $no-sink-call-2 (param $p i32) (result i32)
(local $temp i32)
;; As above, but add a nop before the final value. We still should not
;; optimize.
(local.set $temp
(call $call.without.effects
(i32.const 1234)
(ref.func $no-sink-call-2)
)
)
(if
(local.get $p)
(then
(return
(local.get $temp)
)
)
)
(nop) ;; this line was added.
(local.get $temp)
)
;; CHECK: (func $no-sink-call-3 (type $1) (param $p i32) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (call $call.without.effects
;; CHECK-NEXT: (i32.const 1234)
;; CHECK-NEXT: (ref.func $no-sink-call-3)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (return
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
(func $no-sink-call-3 (param $p i32) (result i32)
(local $temp i32)
;; As above, but add a nop after the get of the local after the if. We still
;; should not optimize.
(local.set $temp
(call $call.without.effects
(i32.const 1234)
(ref.func $no-sink-call-3)
)
)
(if
(local.get $p)
(then
(return
(local.get $temp)
)
)
)
(nop)
(drop
(local.get $temp) ;; this get is now dropped.
)
(nop) ;; this line was added;
(i32.const 0) ;; this line was added.
)
;; CHECK: (func $sink-call-3 (type $1) (param $p i32) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (call $call.without.effects
;; CHECK-NEXT: (i32.const 1234)
;; CHECK-NEXT: (ref.func $no-sink-call-3)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (return
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: )
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
(func $sink-call-3 (param $p i32) (result i32)
(local $temp i32)
;; As above, but stop reading the relevant local after the if, keeping the
;; number of other items unchanged. This verifies the presence of multiple
;; items is not a problem and we can optimize.
(local.set $temp
(call $call.without.effects
(i32.const 1234)
(ref.func $no-sink-call-3)
)
)
(if
(local.get $p)
(then
(return
(local.get $temp)
)
)
)
(nop)
(drop
(local.get $p) ;; this get now reads $p
)
(nop)
(i32.const 0)
)
;; CHECK: (func $no-sink-call-sub (type $1) (param $p i32) (result i32)
;; CHECK-NEXT: (local $temp i32)
;; CHECK-NEXT: (local $other i32)
;; CHECK-NEXT: (local.set $temp
;; CHECK-NEXT: (call $call.without.effects
;; CHECK-NEXT: (local.tee $other
;; CHECK-NEXT: (i32.const 1234)
;; CHECK-NEXT: )
;; CHECK-NEXT: (ref.func $no-sink-call)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (if
;; CHECK-NEXT: (local.get $p)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (return
;; CHECK-NEXT: (local.get $temp)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (i32.const 0)
;; CHECK-NEXT: )
(func $no-sink-call-sub (param $p i32) (result i32)
(local $temp i32)
(local $other i32)
;; The call has no effects, but one of the arguments to it does, so we
;; cannot optimize.
(local.set $temp
(call $call.without.effects
(local.tee $other ;; an effect
(i32.const 1234)
)
(ref.func $no-sink-call)
)
)
(if
(local.get $p)
(then
(return
(local.get $temp)
)
)
)
(i32.const 0)
)
;; CHECK: (func $ref-into-if (type $4) (param $0 (ref any))
;; CHECK-NEXT: (local $1 anyref)
;; CHECK-NEXT: (nop)
;; CHECK-NEXT: (if
;; CHECK-NEXT: (i32.const 1)
;; CHECK-NEXT: (then
;; CHECK-NEXT: (unreachable)
;; CHECK-NEXT: )
;; CHECK-NEXT: (else
;; CHECK-NEXT: (block $label$3
;; CHECK-NEXT: (local.set $1
;; CHECK-NEXT: (local.get $0)
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (local.get $1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: (drop
;; CHECK-NEXT: (ref.as_non_null
;; CHECK-NEXT: (local.get $1)
;; CHECK-NEXT: )
;; CHECK-NEXT: )
;; CHECK-NEXT: )
(func $ref-into-if (param $0 (ref any))
(local $1 (ref any))
;; This can be pushed into the reachable if arm. After doing so, however,
;; the local $1 no longer has a single set that dominates it in the sense of
;; the wasm validation rules for non-nullable locals, so the local must be
;; turned into a nullable one.
(local.set $1
(local.get $0)
)
(if
(i32.const 1)
(then
(unreachable)
)
(else
(block $label$3
(drop
(local.get $1)
)
)
)
)
(drop
(local.get $1)
)
)
)
|
