[GC] ref.as_* (#3520)

These are similar to is, but instead of returning an i32 answer, they trap on
an invalid value, and return it otherwise.

These could in theory be in a single RefDoThing, with opcodes for both As
and Is, but as the return values are different, that would be a little odd, and
the name would be less clear.

4 files changed, 59 insertions, 3 deletions

diff --git a/test/heap-types.wast b/test/heap-types.wast
index 614bbb1c5..a36f12daf 100644
--- a/test/heap-types.wast
+++ b/test/heap-types.wast
@@ -187,4 +187,9 @@
     (if (ref.is_data (local.get $x)) (unreachable))
     (if (ref.is_i31 (local.get $x)) (unreachable))
   )
+  (func $ref.as_X (param $x anyref)
+    (drop (ref.as_func (local.get $x)))
+    (drop (ref.as_data (local.get $x)))
+    (drop (ref.as_i31 (local.get $x)))
+  )
 )
diff --git a/test/heap-types.wast.from-wast b/test/heap-types.wast.from-wast
index b717de63f..4ff3bceec 100644
--- a/test/heap-types.wast.from-wast
+++ b/test/heap-types.wast.from-wast
@@ -3,8 +3,8 @@
  (type $[mut:f64] (array (mut f64)))
  (type ${} (struct ))
  (type ${mut:f32} (struct (field (mut f32))))
- (type $none_=>_none (func))
  (type $anyref_=>_none (func (param anyref)))
+ (type $none_=>_none (func))
  (type ${i32} (struct (field i32)))
  (type ${i32_i64} (struct (field i32) (field i64)))
  (type $[mut:i32] (array (mut i32)))
@@ -217,4 +217,21 @@
    (unreachable)
   )
  )
+ (func $ref.as_X (param $x anyref)
+  (drop
+   (ref.as_func
+    (local.get $x)
+   )
+  )
+  (drop
+   (ref.as_data
+    (local.get $x)
+   )
+  )
+  (drop
+   (ref.as_i31
+    (local.get $x)
+   )
+  )
+ )
 )
diff --git a/test/heap-types.wast.fromBinary b/test/heap-types.wast.fromBinary
index 5b6dca2f6..9f0220c53 100644
--- a/test/heap-types.wast.fromBinary
+++ b/test/heap-types.wast.fromBinary
@@ -3,8 +3,8 @@
  (type $[mut:f64] (array (mut f64)))
  (type ${} (struct ))
  (type ${mut:f32} (struct (field (mut f32))))
- (type $none_=>_none (func))
  (type $anyref_=>_none (func (param anyref)))
+ (type $none_=>_none (func))
  (type ${i32} (struct (field i32)))
  (type ${i32_i64} (struct (field i32) (field i64)))
  (type $[mut:i32] (array (mut i32)))
@@ -216,5 +216,22 @@
    (unreachable)
   )
  )
+ (func $ref.as_X (param $x anyref)
+  (drop
+   (ref.as_func
+    (local.get $x)
+   )
+  )
+  (drop
+   (ref.as_data
+    (local.get $x)
+   )
+  )
+  (drop
+   (ref.as_i31
+    (local.get $x)
+   )
+  )
+ )
 )
 
diff --git a/test/heap-types.wast.fromBinary.noDebugInfo b/test/heap-types.wast.fromBinary.noDebugInfo
index fef210e11..864d66abb 100644
--- a/test/heap-types.wast.fromBinary.noDebugInfo
+++ b/test/heap-types.wast.fromBinary.noDebugInfo
@@ -3,8 +3,8 @@
  (type $[mut:f64] (array (mut f64)))
  (type ${} (struct ))
  (type ${mut:f32} (struct (field (mut f32))))
- (type $none_=>_none (func))
  (type $anyref_=>_none (func (param anyref)))
+ (type $none_=>_none (func))
  (type ${i32} (struct (field i32)))
  (type ${i32_i64} (struct (field i32) (field i64)))
  (type $[mut:i32] (array (mut i32)))
@@ -216,5 +216,22 @@
    (unreachable)
   )
  )
+ (func $6 (param $0 anyref)
+  (drop
+   (ref.as_func
+    (local.get $0)
+   )
+  )
+  (drop
+   (ref.as_data
+    (local.get $0)
+   )
+  )
+  (drop
+   (ref.as_i31
+    (local.get $0)
+   )
+  )
+ )
 )