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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
+
+;; The tests in this file test EffectAnalyzer, which is used by CodePushing.
+
+(module
+ ;; CHECK: (tag $e (param i32))
+ (tag $e (param i32))
+
+ ;; CHECK: (func $cannot-push-past-call (type $0)
+ ;; CHECK-NEXT: (local $x i32)
+ ;; CHECK-NEXT: (block $out
+ ;; CHECK-NEXT: (local.set $x
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (call $cannot-push-past-call)
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (br_if $out
+ ;; CHECK-NEXT: (i32.const 2)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (local.get $x)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ (func $cannot-push-past-call
+ (local $x i32)
+ (block $out
+ ;; This local.set cannot be pushed down, because the call below can throw.
+ (local.set $x (i32.const 1))
+ (call $cannot-push-past-call)
+ (drop (i32.const 1))
+ (br_if $out (i32.const 2))
+ (drop (local.get $x))
+ )
+ )
+
+ ;; CHECK: (func $cannot-push-past-throw (type $0)
+ ;; CHECK-NEXT: (local $x i32)
+ ;; CHECK-NEXT: (block $out
+ ;; CHECK-NEXT: (local.set $x
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (throw $e
+ ;; CHECK-NEXT: (i32.const 0)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (br_if $out
+ ;; CHECK-NEXT: (i32.const 2)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (local.get $x)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ (func $cannot-push-past-throw
+ (local $x i32)
+ (block $out
+ ;; This local.set cannot be pushed down, because there is 'throw' below.
+ ;; This pass only pushes past conditional control flow atm.
+ (local.set $x (i32.const 1))
+ (throw $e (i32.const 0))
+ (drop (i32.const 1))
+ (br_if $out (i32.const 2))
+ (drop (local.get $x))
+ )
+ )
+
+ ;; CHECK: (func $can-push-past-try_table (type $0)
+ ;; CHECK-NEXT: (local $x i32)
+ ;; CHECK-NEXT: (block $out
+ ;; CHECK-NEXT: (block $tryend
+ ;; CHECK-NEXT: (block $catch
+ ;; CHECK-NEXT: (try_table (catch_all $catch)
+ ;; CHECK-NEXT: (throw $e
+ ;; CHECK-NEXT: (i32.const 0)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (br $tryend)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (br_if $out
+ ;; CHECK-NEXT: (i32.const 2)
+ ;; CHECK-NEXT: )
+ ;; 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: )
+ (func $can-push-past-try_table
+ (local $x i32)
+ (block $out
+ ;; This local.set can be pushed down, because the 'throw' below is going
+ ;; to be caught by the inner catch_all.
+ (local.set $x (i32.const 1))
+ (block $tryend
+ (block $catch
+ (try_table (catch_all $catch)
+ (throw $e (i32.const 0))
+ )
+ (br $tryend)
+ )
+ )
+ (drop (i32.const 1))
+ (br_if $out (i32.const 2))
+ (drop (local.get $x))
+ )
+ )
+
+ ;; CHECK: (func $foo (type $0)
+ ;; CHECK-NEXT: (nop)
+ ;; CHECK-NEXT: )
+ (func $foo)
+
+ ;; CHECK: (func $cannot-push-past-try_table (type $0)
+ ;; CHECK-NEXT: (local $x i32)
+ ;; CHECK-NEXT: (block $out
+ ;; CHECK-NEXT: (local.set $x
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (block $tryend
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (block $catch (result i32)
+ ;; CHECK-NEXT: (try_table (catch $e $catch)
+ ;; CHECK-NEXT: (call $foo)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (br $tryend)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (br_if $out
+ ;; CHECK-NEXT: (i32.const 2)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (local.get $x)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ (func $cannot-push-past-try_table
+ (local $x i32)
+ (block $out
+ ;; This local.set cannot be pushed down, because the exception thrown by
+ ;; 'call $foo' below may not be caught by 'catch $e'.
+ (local.set $x (i32.const 1))
+ (block $tryend
+ (drop
+ (block $catch (result i32)
+ (try_table (catch $e $catch)
+ (call $foo)
+ )
+ (br $tryend)
+ )
+ )
+ )
+ (drop (i32.const 1))
+ (br_if $out (i32.const 2))
+ (drop (local.get $x))
+ )
+ )
+
+ ;; CHECK: (func $cannot-push-past-throw_ref-within-catch (type $0)
+ ;; CHECK-NEXT: (local $x i32)
+ ;; CHECK-NEXT: (block $out
+ ;; CHECK-NEXT: (local.set $x
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (block $tryend
+ ;; CHECK-NEXT: (throw_ref
+ ;; CHECK-NEXT: (block $catch (result exnref)
+ ;; CHECK-NEXT: (try_table (catch_all_ref $catch)
+ ;; CHECK-NEXT: (throw $e
+ ;; CHECK-NEXT: (i32.const 0)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (br $tryend)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (br_if $out
+ ;; CHECK-NEXT: (i32.const 2)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (local.get $x)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ (func $cannot-push-past-throw_ref-within-catch
+ (local $x i32)
+ (block $out
+ ;; This local.set cannot be pushed down, because there is 'throw_ref'
+ ;; within the catch handler.
+ (local.set $x (i32.const 1))
+ (block $tryend
+ (throw_ref
+ (block $catch (result exnref)
+ (try_table (catch_all_ref $catch)
+ (throw $e (i32.const 0))
+ )
+ (br $tryend)
+ )
+ )
+ )
+ (drop (i32.const 1))
+ (br_if $out (i32.const 2))
+ (drop (local.get $x))
+ )
+ )
+
+ ;; CHECK: (func $can-push-past-conditional-throw (type $1) (param $param i32)
+ ;; CHECK-NEXT: (local $x i32)
+ ;; CHECK-NEXT: (block $block
+ ;; CHECK-NEXT: (if
+ ;; CHECK-NEXT: (local.get $param)
+ ;; CHECK-NEXT: (then
+ ;; CHECK-NEXT: (throw $e
+ ;; CHECK-NEXT: (i32.const 0)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; 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: )
+ (func $can-push-past-conditional-throw (param $param i32)
+ (local $x i32)
+ (block $block
+ ;; We can push past an if containing a throw. The if is conditional
+ ;; control flow, which is what we look for in this optimization, and a
+ ;; throw is like a break - it will jump out of the current block - so we
+ ;; can push the set past it, as the set is only needed in this block.
+ (local.set $x (i32.const 1))
+ (if
+ (local.get $param)
+ (then
+ (throw $e (i32.const 0))
+ )
+ )
+ (drop (local.get $x))
+ )
+ )
+
+ ;; CHECK: (func $cannot-push-past-conditional-throw-extra-use (type $1) (param $param i32)
+ ;; CHECK-NEXT: (local $x i32)
+ ;; CHECK-NEXT: (block $block
+ ;; CHECK-NEXT: (local.set $x
+ ;; CHECK-NEXT: (i32.const 1)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (if
+ ;; CHECK-NEXT: (local.get $param)
+ ;; CHECK-NEXT: (then
+ ;; CHECK-NEXT: (throw $e
+ ;; CHECK-NEXT: (i32.const 0)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (local.get $x)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: (drop
+ ;; CHECK-NEXT: (local.get $x)
+ ;; CHECK-NEXT: )
+ ;; CHECK-NEXT: )
+ (func $cannot-push-past-conditional-throw-extra-use (param $param i32)
+ (local $x i32)
+ ;; As above, but now there is another local.get outside of the block. That
+ ;; means the local.set cannot be pushed to a place it might not execute.
+ (block $block
+ (local.set $x (i32.const 1))
+ (if
+ (local.get $param)
+ (then
+ (throw $e (i32.const 0))
+ )
+ )
+ (drop (local.get $x))
+ )
+ (drop (local.get $x))
+ )
+)
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