diff --git a/ml-proto/host/run.ml b/ml-proto/host/run.ml
index d545e7d5ac..427fbf4a33 100644
--- a/ml-proto/host/run.ml
+++ b/ml-proto/host/run.ml
@@ -30,8 +30,8 @@ let run_from get_script =
   | Parse.Syntax (at, msg) -> error at "syntax error" msg
   | Script.Assert (at, msg) -> error at "assertion failure" msg
   | Check.Invalid (at, msg) -> error at "invalid module" msg
-  | Eval.Trap (at, msg) -> error at "runtime trap" msg
-  | Eval.Crash (at, msg) -> error at "runtime crash" msg
+  | Eval.Trap (at, msg) -> error at "runtime trap" ("trap: " ^ msg)
+  | Eval.Crash (at, msg) -> error at "runtime crash" ("crash: " ^ msg)
   | Import.Unknown (at, msg) -> error at "unknown import" msg
   | Script.IO (at, msg) -> error at "i/o error" msg
   | Script.Abort _ -> false
diff --git a/ml-proto/test/block.wast b/ml-proto/test/block.wast
index c09de3635d..05ff847edf 100644
--- a/ml-proto/test/block.wast
+++ b/ml-proto/test/block.wast
@@ -33,16 +33,16 @@
     ))))))))))
   )
 
-  (func "unary-operand" (result i32)
+  (func "as-unary-operand" (result i32)
     (i32.ctz (block (call $nop) (i32.const 13)))
   )
-  (func "binary-operand" (result i32)
+  (func "as-binary-operand" (result i32)
     (i32.mul (block (call $nop) (i32.const 3)) (block (call $nop) (i32.const 4)))
   )
-  (func "test-operand" (result i32)
+  (func "as-test-operand" (result i32)
     (i32.eqz (block (call $nop) (i32.const 13)))
   )
-  (func "compare-operand" (result i32)
+  (func "as-compare-operand" (result i32)
     (f32.gt (block (call $nop) (f32.const 3)) (block (call $nop) (f32.const 3)))
   )
 
@@ -131,10 +131,10 @@
 (assert_return (invoke "nested") (i32.const 9))
 (assert_return (invoke "deep") (i32.const 150))
 
-(assert_return (invoke "unary-operand") (i32.const 0))
-(assert_return (invoke "binary-operand") (i32.const 12))
-(assert_return (invoke "test-operand") (i32.const 0))
-(assert_return (invoke "compare-operand") (i32.const 0))
+(assert_return (invoke "as-unary-operand") (i32.const 0))
+(assert_return (invoke "as-binary-operand") (i32.const 12))
+(assert_return (invoke "as-test-operand") (i32.const 0))
+(assert_return (invoke "as-compare-operand") (i32.const 0))
 
 (assert_return (invoke "break-bare") (i32.const 19))
 (assert_return (invoke "break-value") (i32.const 18))
@@ -150,43 +150,100 @@
 (assert_return (invoke "effects") (i32.const 1))
 
 (assert_invalid
-  (module (func (result i32) (block)))
+  (module (func $type-empty-i32 (result i32) (block)))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (block (nop))))
+  (module (func $type-empty-i64 (result i64) (block)))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (block (f32.const 0))))
+  (module (func $type-empty-f32 (result f32) (block)))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (block (br 0) (i32.const 1))))
+  (module (func $type-empty-f64 (result f64) (block)))
   "type mismatch"
 )
+
 (assert_invalid
-  (module (func (result i32) (block (br 0 (i32.const 1)) (nop))))
+  (module (func $type-value-void-vs-num (result i32)
+    (block (nop))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (block (br 0 (i64.const 1)) (i32.const 1))))
+  (module (func $type-value-num-vs-num (result i32)
+    (block (f32.const 0))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (block (br 0 (i64.const 1)) (br 0 (i32.const 1)))))
+  (module (func $type-value-void-vs-num-after-break (result i32)
+    (block (br 0 (i32.const 1)) (nop))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-value-num-vs-num-after-break (result i32)
+    (block (br 0 (i32.const 1)) (f32.const 0))
+  ))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $type-break-last-void-vs-num (result i32)
+    (block (br 0))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-break-void-vs-num (result i32)
+    (block (br 0) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-break-num-vs-num (result i32)
+    (block (br 0 (i64.const 1)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-break-first-num-vs-num (result i32)
+    (block (br 0 (i64.const 1)) (br 0 (i32.const 1)))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-break-second-num-vs-num (result i32)
+    (block (br 0 (i32.const 1)) (br 0 (f64.const 1)))
+  ))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $type-break-nested-void-vs-num (result i32)
+    (block (block (br 1)) (br 0 (i32.const 1)))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (block (block (br 1 (i64.const 1))) (br 0 (i32.const 1)))))
+  (module (func $type-break-nested-num-vs-num (result i32)
+    (block (block (br 1 (i64.const 1))) (br 0 (i32.const 1)))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (block (br 0))))
+  (module (func $type-break-operand-void-vs-num (result i32)
+    (i32.ctz (block (br 0)))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (i32.ctz (block (br 0)))))
+  (module (func $type-break-operand-num-vs-num (result i32)
+    (i64.ctz (block (br 0 (i64.const 9))))
+  ))
   "type mismatch"
 )
 
diff --git a/ml-proto/test/br.wast b/ml-proto/test/br.wast
index f2b3585546..b8a6f9390c 100644
--- a/ml-proto/test/br.wast
+++ b/ml-proto/test/br.wast
@@ -6,169 +6,248 @@
   (func "type-f32" (block (f32.neg (br 0))))
   (func "type-f64" (block (f64.neg (br 0))))
 
-  (func "block-first"
+  (func "type-i32-value" (result i32) (block (i32.ctz (br 0 (i32.const 1)))))
+  (func "type-i64-value" (result i64) (block (i64.ctz (br 0 (i64.const 2)))))
+  (func "type-f32-value" (result f32) (block (f32.neg (br 0 (f32.const 3)))))
+  (func "type-f64-value" (result f64) (block (f64.neg (br 0 (f64.const 4)))))
+
+  (func "as-block-first"
     (block (br 0) (i32.const 2))
   )
-  (func "block-mid"
+  (func "as-block-mid"
     (block (i32.const 1) (br 0) (i32.const 2))
   )
-  (func "block-last"
+  (func "as-block-last"
     (block (nop) (i32.const 1) (br 0))
   )
-  (func "block-value" (result i32)
+  (func "as-block-value" (result i32)
     (block (nop) (i32.const 1) (br 0 (i32.const 2)))
   )
 
-  (func "loop-first" (result i32)
+  (func "as-loop-first" (result i32)
     (loop (br 1 (i32.const 3)) (i32.const 2))
   )
-  (func "loop-mid" (result i32)
+  (func "as-loop-mid" (result i32)
     (loop (i32.const 1) (br 1 (i32.const 4)) (i32.const 2))
   )
-  (func "loop-last" (result i32)
+  (func "as-loop-last" (result i32)
     (loop (nop) (i32.const 1) (br 1 (i32.const 5)))
   )
 
-  (func "br-value" (result i32)
+  (func "as-br-value" (result i32)
     (block (br 0 (br 0 (i32.const 9))))
   )
 
-  (func "br_if-cond"
+  (func "as-br_if-cond"
     (block (br_if 0 (br 0)))
   )
-  (func "br_if-value" (result i32)
+  (func "as-br_if-value" (result i32)
     (block (br_if 0 (br 0 (i32.const 8)) (i32.const 1)) (i32.const 7))
   )
-  (func "br_if-value-cond" (result i32)
+  (func "as-br_if-value-cond" (result i32)
     (block (br_if 0 (i32.const 6) (br 0 (i32.const 9))) (i32.const 7))
   )
 
-  (func "br_table-index"
+  (func "as-br_table-index"
     (block (br_table 0 0 0 (br 0)))
   )
-  (func "br_table-value" (result i32)
+  (func "as-br_table-value" (result i32)
     (block (br_table 0 0 0 (br 0 (i32.const 10)) (i32.const 1)) (i32.const 7))
   )
-  (func "br_table-value-index" (result i32)
+  (func "as-br_table-value-index" (result i32)
     (block (br_table 0 0 (i32.const 6) (br 0 (i32.const 11))) (i32.const 7))
   )
 
-  (func "return-value" (result i64)
+  (func "as-return-value" (result i64)
     (block (return (br 0 (i64.const 7))))
   )
 
-  (func "if-cond" (result i32)
+  (func "as-if-cond" (result i32)
     (block (if (br 0 (i32.const 2)) (i32.const 0) (i32.const 1)))
   )
-  (func "if-then" (param i32 i32) (result i32)
+  (func "as-if-then" (param i32 i32) (result i32)
     (block (if (get_local 0) (br 1 (i32.const 3)) (get_local 1)))
   )
-  (func "if-else" (param i32 i32) (result i32)
+  (func "as-if-else" (param i32 i32) (result i32)
     (block (if (get_local 0) (get_local 1) (br 1 (i32.const 4))))
   )
 
-  (func "select-first" (param i32 i32) (result i32)
+  (func "as-select-first" (param i32 i32) (result i32)
     (block (select (br 0 (i32.const 5)) (get_local 0) (get_local 1)))
   )
-  (func "select-second" (param i32 i32) (result i32)
+  (func "as-select-second" (param i32 i32) (result i32)
     (block (select (get_local 0) (br 0 (i32.const 6)) (get_local 1)))
   )
-  (func "select-cond" (result i32)
+  (func "as-select-cond" (result i32)
     (block (select (i32.const 0) (i32.const 1) (br 0 (i32.const 7))))
   )
 
   (func $f (param i32 i32 i32) (result i32) (i32.const -1))
-  (func "call-first" (result i32)
+  (func "as-call-first" (result i32)
     (block (call $f (br 0 (i32.const 12)) (i32.const 2) (i32.const 3)))
   )
-  (func "call-mid" (result i32)
+  (func "as-call-mid" (result i32)
     (block (call $f (i32.const 1) (br 0 (i32.const 13)) (i32.const 3)))
   )
-  (func "call-last" (result i32)
+  (func "as-call-last" (result i32)
     (block (call $f (i32.const 1) (i32.const 2) (br 0 (i32.const 14))))
   )
 
   (import "spectest" "print" (param i32 i32 i32))
-  (func "call_import-first"
+  (func "as-call_import-first"
     (block (call_import 0 (br 0) (i32.const 2) (i32.const 3)))
   )
-  (func "call_import-mid"
+  (func "as-call_import-mid"
     (block (call_import 0 (i32.const 1) (br 0) (i32.const 3)))
   )
-  (func "call_import-last"
+  (func "as-call_import-last"
     (block (call_import 0 (i32.const 1) (i32.const 2) (br 0)))
   )
 
   (type $sig (func (param i32 i32 i32) (result i32)))
   (table $f)
-  (func "call_indirect-func" (result i32)
+  (func "as-call_indirect-func" (result i32)
     (block (call_indirect $sig (br 0 (i32.const 20)) (i32.const 1) (i32.const 2) (i32.const 3)))
   )
-  (func "call_indirect-first" (result i32)
+  (func "as-call_indirect-first" (result i32)
     (block (call_indirect $sig (i32.const 0) (br 0 (i32.const 21)) (i32.const 2) (i32.const 3)))
   )
-  (func "call_indirect-mid" (result i32)
+  (func "as-call_indirect-mid" (result i32)
     (block (call_indirect $sig (i32.const 0) (i32.const 1) (br 0 (i32.const 22)) (i32.const 3)))
   )
-  (func "call_indirect-last" (result i32)
+  (func "as-call_indirect-last" (result i32)
     (block (call_indirect $sig (i32.const 0) (i32.const 1) (i32.const 2) (br 0 (i32.const 23))))
   )
 
-  (func "set_local-value" (result i32) (local f32)
+  (func "as-set_local-value" (result i32) (local f32)
     (block (set_local 0 (br 0 (i32.const 17))) (i32.const -1))
   )
 
   (memory 1)
-  (func "load-address" (result f32)
+  (func "as-load-address" (result f32)
     (block (f32.load (br 0 (f32.const 1.7))))
   )
-  (func "loadN-address" (result i64)
+  (func "as-loadN-address" (result i64)
     (block (i64.load8_s (br 0 (i64.const 30))))
   )
 
-  (func "store-address" (result i32)
+  (func "as-store-address" (result i32)
     (block (f64.store (br 0 (i32.const 30)) (f64.const 7)) (i32.const -1))
   )
-  (func "store-value" (result i32)
+  (func "as-store-value" (result i32)
     (block (i64.store (i32.const 2) (br 0 (i32.const 31))) (i32.const -1))
   )
 
-  (func "storeN-address" (result i32)
+  (func "as-storeN-address" (result i32)
     (block (i32.store8 (br 0 (i32.const 32)) (i32.const 7)) (i32.const -1))
   )
-  (func "storeN-value" (result i32)
+  (func "as-storeN-value" (result i32)
     (block (i64.store16 (i32.const 2) (br 0 (i32.const 33))) (i32.const -1))
   )
 
-  (func "unary-operand" (result f32)
+  (func "as-unary-operand" (result f32)
     (block (f32.neg (br 0 (f32.const 3.4))))
   )
 
-  (func "binary-left" (result i32)
+  (func "as-binary-left" (result i32)
     (block (i32.add (br 0 (i32.const 3)) (i32.const 10)))
   )
-  (func "binary-right" (result i64)
+  (func "as-binary-right" (result i64)
     (block (i64.sub (i64.const 10) (br 0 (i64.const 45))))
   )
 
-  (func "test-operand" (result i32)
+  (func "as-test-operand" (result i32)
     (block (i32.eqz (br 0 (i32.const 44))))
   )
 
-  (func "compare-left" (result i32)
+  (func "as-compare-left" (result i32)
     (block (f64.le (br 0 (i32.const 43)) (f64.const 10)))
   )
-  (func "compare-right" (result i32)
+  (func "as-compare-right" (result i32)
     (block (f32.ne (f32.const 10) (br 0 (i32.const 42))))
   )
 
-  (func "convert-operand" (result i32)
+  (func "as-convert-operand" (result i32)
     (block (i32.wrap/i64 (br 0 (i32.const 41))))
   )
 
-  (func "grow_memory-size" (result i32)
+  (func "as-grow_memory-size" (result i32)
     (block (grow_memory (br 0 (i32.const 40))))
   )
+
+  (func "nested-block-value" (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (i32.add (i32.const 4) (br 0 (i32.const 8)))
+      )
+    )
+  )
+
+  (func "nested-br-value" (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (block
+          (i32.const 4)
+          (br 0 (br 1 (i32.const 8)))
+        )
+        (i32.const 16)
+      )
+    )
+  )
+
+  (func "nested-br_if-value" (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (block
+          (i32.const 4)
+          (br_if 0 (br 1 (i32.const 8)) (i32.const 1))
+        )
+        (i32.const 16)
+      )
+    )
+  )
+
+  (func "nested-br_if-value-cond" (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (br_if 0 (i32.const 4) (br 0 (i32.const 8)))
+        (i32.const 16)
+      )
+    )
+  )
+
+  (func "nested-br_table-value" (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (block
+          (i32.const 4)
+          (br_table 0 (br 1 (i32.const 8)) (i32.const 1))
+        )
+        (i32.const 16)
+      )
+    )
+  )
+
+  (func "nested-br_table-value-index" (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (br_table 0 (i32.const 4) (br 0 (i32.const 8)))
+        (i32.const 16)
+      )
+    )
+  )
 )
 
 (assert_return (invoke "type-i32"))
@@ -176,73 +255,111 @@
 (assert_return (invoke "type-f32"))
 (assert_return (invoke "type-f64"))
 
-(assert_return (invoke "block-first"))
-(assert_return (invoke "block-mid"))
-(assert_return (invoke "block-last"))
-(assert_return (invoke "block-value") (i32.const 2))
+(assert_return (invoke "type-i32-value") (i32.const 1))
+(assert_return (invoke "type-i64-value") (i64.const 2))
+(assert_return (invoke "type-f32-value") (f32.const 3))
+(assert_return (invoke "type-f64-value") (f64.const 4))
+
+(assert_return (invoke "as-block-first"))
+(assert_return (invoke "as-block-mid"))
+(assert_return (invoke "as-block-last"))
+(assert_return (invoke "as-block-value") (i32.const 2))
+
+(assert_return (invoke "as-loop-first") (i32.const 3))
+(assert_return (invoke "as-loop-mid") (i32.const 4))
+(assert_return (invoke "as-loop-last") (i32.const 5))
+
+(assert_return (invoke "as-br-value") (i32.const 9))
 
-(assert_return (invoke "loop-first") (i32.const 3))
-(assert_return (invoke "loop-mid") (i32.const 4))
-(assert_return (invoke "loop-last") (i32.const 5))
+(assert_return (invoke "as-br_if-cond"))
+(assert_return (invoke "as-br_if-value") (i32.const 8))
+(assert_return (invoke "as-br_if-value-cond") (i32.const 9))
 
-(assert_return (invoke "br-value") (i32.const 9))
+(assert_return (invoke "as-br_table-index"))
+(assert_return (invoke "as-br_table-value") (i32.const 10))
+(assert_return (invoke "as-br_table-value-index") (i32.const 11))
 
-(assert_return (invoke "br_if-cond"))
-(assert_return (invoke "br_if-value") (i32.const 8))
-(assert_return (invoke "br_if-value-cond") (i32.const 9))
+(assert_return (invoke "as-return-value") (i64.const 7))
 
-(assert_return (invoke "br_table-index"))
-(assert_return (invoke "br_table-value") (i32.const 10))
-(assert_return (invoke "br_table-value-index") (i32.const 11))
+(assert_return (invoke "as-if-cond") (i32.const 2))
+(assert_return (invoke "as-if-then" (i32.const 1) (i32.const 6)) (i32.const 3))
+(assert_return (invoke "as-if-then" (i32.const 0) (i32.const 6)) (i32.const 6))
+(assert_return (invoke "as-if-else" (i32.const 0) (i32.const 6)) (i32.const 4))
+(assert_return (invoke "as-if-else" (i32.const 1) (i32.const 6)) (i32.const 6))
 
-(assert_return (invoke "return-value") (i64.const 7))
+(assert_return (invoke "as-select-first" (i32.const 0) (i32.const 6)) (i32.const 5))
+(assert_return (invoke "as-select-first" (i32.const 1) (i32.const 6)) (i32.const 5))
+(assert_return (invoke "as-select-second" (i32.const 0) (i32.const 6)) (i32.const 6))
+(assert_return (invoke "as-select-second" (i32.const 1) (i32.const 6)) (i32.const 6))
+(assert_return (invoke "as-select-cond") (i32.const 7))
 
-(assert_return (invoke "if-cond") (i32.const 2))
-(assert_return (invoke "if-then" (i32.const 1) (i32.const 6)) (i32.const 3))
-(assert_return (invoke "if-then" (i32.const 0) (i32.const 6)) (i32.const 6))
-(assert_return (invoke "if-else" (i32.const 0) (i32.const 6)) (i32.const 4))
-(assert_return (invoke "if-else" (i32.const 1) (i32.const 6)) (i32.const 6))
+(assert_return (invoke "as-call-first") (i32.const 12))
+(assert_return (invoke "as-call-mid") (i32.const 13))
+(assert_return (invoke "as-call-last") (i32.const 14))
 
-(assert_return (invoke "select-first" (i32.const 0) (i32.const 6)) (i32.const 5))
-(assert_return (invoke "select-first" (i32.const 1) (i32.const 6)) (i32.const 5))
-(assert_return (invoke "select-second" (i32.const 0) (i32.const 6)) (i32.const 6))
-(assert_return (invoke "select-second" (i32.const 1) (i32.const 6)) (i32.const 6))
-(assert_return (invoke "select-cond") (i32.const 7))
+(assert_return (invoke "as-call_import-first"))
+(assert_return (invoke "as-call_import-mid"))
+(assert_return (invoke "as-call_import-last"))
 
-(assert_return (invoke "call-first") (i32.const 12))
-(assert_return (invoke "call-mid") (i32.const 13))
-(assert_return (invoke "call-last") (i32.const 14))
+(assert_return (invoke "as-call_indirect-func") (i32.const 20))
+(assert_return (invoke "as-call_indirect-first") (i32.const 21))
+(assert_return (invoke "as-call_indirect-mid") (i32.const 22))
+(assert_return (invoke "as-call_indirect-last") (i32.const 23))
 
-(assert_return (invoke "call_import-first"))
-(assert_return (invoke "call_import-mid"))
-(assert_return (invoke "call_import-last"))
+(assert_return (invoke "as-set_local-value") (i32.const 17))
 
-(assert_return (invoke "call_indirect-func") (i32.const 20))
-(assert_return (invoke "call_indirect-first") (i32.const 21))
-(assert_return (invoke "call_indirect-mid") (i32.const 22))
-(assert_return (invoke "call_indirect-last") (i32.const 23))
+(assert_return (invoke "as-load-address") (f32.const 1.7))
+(assert_return (invoke "as-loadN-address") (i64.const 30))
 
-(assert_return (invoke "set_local-value") (i32.const 17))
+(assert_return (invoke "as-store-address") (i32.const 30))
+(assert_return (invoke "as-store-value") (i32.const 31))
+(assert_return (invoke "as-storeN-address") (i32.const 32))
+(assert_return (invoke "as-storeN-value") (i32.const 33))
 
-(assert_return (invoke "load-address") (f32.const 1.7))
-(assert_return (invoke "loadN-address") (i64.const 30))
+(assert_return (invoke "as-unary-operand") (f32.const 3.4))
 
-(assert_return (invoke "store-address") (i32.const 30))
-(assert_return (invoke "store-value") (i32.const 31))
-(assert_return (invoke "storeN-address") (i32.const 32))
-(assert_return (invoke "storeN-value") (i32.const 33))
+(assert_return (invoke "as-binary-left") (i32.const 3))
+(assert_return (invoke "as-binary-right") (i64.const 45))
 
-(assert_return (invoke "unary-operand") (f32.const 3.4))
+(assert_return (invoke "as-test-operand") (i32.const 44))
 
-(assert_return (invoke "binary-left") (i32.const 3))
-(assert_return (invoke "binary-right") (i64.const 45))
+(assert_return (invoke "as-compare-left") (i32.const 43))
+(assert_return (invoke "as-compare-right") (i32.const 42))
 
-(assert_return (invoke "test-operand") (i32.const 44))
+(assert_return (invoke "as-convert-operand") (i32.const 41))
 
-(assert_return (invoke "compare-left") (i32.const 43))
-(assert_return (invoke "compare-right") (i32.const 42))
+(assert_return (invoke "as-grow_memory-size") (i32.const 40))
 
-(assert_return (invoke "convert-operand") (i32.const 41))
+(assert_return (invoke "nested-block-value") (i32.const 9))
+(assert_return (invoke "nested-br-value") (i32.const 9))
+(assert_return (invoke "nested-br_if-value") (i32.const 9))
+(assert_return (invoke "nested-br_if-value-cond") (i32.const 9))
+(assert_return (invoke "nested-br_table-value") (i32.const 9))
+(assert_return (invoke "nested-br_table-value-index") (i32.const 9))
 
-(assert_return (invoke "grow_memory-size") (i32.const 40))
+(assert_invalid
+  (module (func $type-arg-void-vs-num (result i32)
+    (block (br 0) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-arg-num-vs-num (result i32)
+    (block (br 0 (i64.const 1)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $unbound-label (br 1)))
+  "unknown label"
+)
+(assert_invalid
+  (module (func $unbound-nested-label (block (block (br 5)))))
+  "unknown label"
+)
+(assert_invalid
+  (module (func $large-label (br 0x100000001)))
+  "unknown label"
+)
 
diff --git a/ml-proto/test/br_if.wast b/ml-proto/test/br_if.wast
new file mode 100644
index 0000000000..dfa989e2a3
--- /dev/null
+++ b/ml-proto/test/br_if.wast
@@ -0,0 +1,291 @@
+;; Test `br_if` operator
+
+(module
+  (func $dummy)
+
+  (func "as-block-first" (param i32) (result i32)
+    (block (br_if 0 (get_local 0)) (return (i32.const 2))) (i32.const 3)
+  )
+  (func "as-block-mid" (param i32) (result i32)
+    (block (call $dummy) (br_if 0 (get_local 0)) (return (i32.const 2))) (i32.const 3)
+  )
+  (func "as-block-last" (param i32)
+    (block (call $dummy) (call $dummy) (br_if 0 (get_local 0)))
+  )
+  (func "as-block-first-value" (param i32) (result i32)
+    (block (br_if 0 (i32.const 10) (get_local 0)) (i32.const 11))
+  )
+  (func "as-block-mid-value" (param i32) (result i32)
+    (block (call $dummy) (br_if 0 (i32.const 20) (get_local 0)) (i32.const 21))
+  )
+
+  (func "as-loop-first" (param i32) (result i32)
+    (loop (br_if 1 (i32.const 3) (get_local 0)) (i32.const 2))
+  )
+  (func "as-loop-mid" (param i32) (result i32)
+    (loop (call $dummy) (br_if 1 (i32.const 4) (get_local 0)) (i32.const 2))
+  )
+  (func "as-loop-last" (param i32)
+    (loop (call $dummy) (br_if 1 (get_local 0)))
+  )
+
+  (func "as-br-value" (param i32)
+    (block (br 0 (br_if 0 (get_local 0))))
+  )
+  (func "as-br_if-value" (param i32 i32)
+    (block (br_if 0 (br_if 0 (get_local 0)) (get_local 1)))
+  )
+  (func "as-br_table-value" (param i32 i32)
+    (block (br_table 0 0 0 (br_if 0 (get_local 0)) (get_local 1)))
+  )
+
+  (func "as-return-value" (param i32)
+    (block (return (br_if 0 (get_local 0))))
+  )
+
+  (func "as-if-then" (param i32 i32)
+    (block (if (get_local 0) (br_if 1 (i32.const 3) (get_local 1)) (call $dummy)))
+  )
+  (func "as-if-else" (param i32 i32)
+    (block (if (get_local 0) (call $dummy) (br_if 1 (i32.const 4) (get_local 1))))
+  )
+
+  (func "nested-block-value" (param i32) (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (i32.add
+          (i32.const 4)
+          (block (br_if 1 (i32.const 8) (get_local 0)) (i32.const 16))
+        )
+      )
+    )
+  )
+
+  (func "nested-br-value" (param i32) (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (br 0
+          (block (br_if 1 (i32.const 8) (get_local 0)) (i32.const 4))
+        )
+        (i32.const 16)
+      )
+    )
+  )
+
+  (func "nested-br_if-value" (param i32) (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (br_if 0
+          (block (br_if 1 (i32.const 8) (get_local 0)) (i32.const 4))
+          (i32.const 1)
+        )
+        (i32.const 16)
+      )
+    )
+  )
+
+  (func "nested-br_if-value-cond" (param i32) (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (br_if 0
+          (i32.const 4)
+          (block (br_if 1 (i32.const 8) (get_local 0)) (i32.const 1))
+        )
+        (i32.const 16)
+      )
+    )
+  )
+
+  (func "nested-br_table-value" (param i32) (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (br_table 0
+          (block (br_if 1 (i32.const 8) (get_local 0)) (i32.const 4))
+          (i32.const 1)
+        )
+        (i32.const 16)
+      )
+    )
+  )
+
+  (func "nested-br_table-value-index" (param i32) (result i32)
+    (i32.add
+      (i32.const 1)
+      (block
+        (i32.const 2)
+        (br_table 0
+          (i32.const 4)
+          (block (br_if 1 (i32.const 8) (get_local 0)) (i32.const 1))
+        )
+        (i32.const 16)
+      )
+    )
+  )
+)
+
+(assert_return (invoke "as-block-first" (i32.const 0)) (i32.const 2))
+(assert_return (invoke "as-block-first" (i32.const 1)) (i32.const 3))
+(assert_return (invoke "as-block-mid" (i32.const 0)) (i32.const 2))
+(assert_return (invoke "as-block-mid" (i32.const 1)) (i32.const 3))
+(assert_return (invoke "as-block-last" (i32.const 0)))
+(assert_return (invoke "as-block-last" (i32.const 1)))
+
+(assert_return (invoke "as-block-first-value" (i32.const 0)) (i32.const 11))
+(assert_return (invoke "as-block-first-value" (i32.const 1)) (i32.const 10))
+(assert_return (invoke "as-block-mid-value" (i32.const 0)) (i32.const 21))
+(assert_return (invoke "as-block-mid-value" (i32.const 1)) (i32.const 20))
+
+(assert_return (invoke "as-loop-first" (i32.const 0)) (i32.const 2))
+(assert_return (invoke "as-loop-first" (i32.const 1)) (i32.const 3))
+(assert_return (invoke "as-loop-mid" (i32.const 0)) (i32.const 2))
+(assert_return (invoke "as-loop-mid" (i32.const 1)) (i32.const 4))
+(assert_return (invoke "as-loop-last" (i32.const 0)))
+(assert_return (invoke "as-loop-last" (i32.const 1)))
+
+(assert_return (invoke "as-br-value" (i32.const 0)))
+(assert_return (invoke "as-br-value" (i32.const 1)))
+
+(assert_return (invoke "as-br_if-value" (i32.const 0) (i32.const 0)))
+(assert_return (invoke "as-br_if-value" (i32.const 1) (i32.const 0)))
+(assert_return (invoke "as-br_if-value" (i32.const 0) (i32.const 1)))
+(assert_return (invoke "as-br_if-value" (i32.const 1) (i32.const 1)))
+
+(assert_return (invoke "as-br_table-value" (i32.const 0) (i32.const 0)))
+(assert_return (invoke "as-br_table-value" (i32.const 1) (i32.const 0)))
+(assert_return (invoke "as-br_table-value" (i32.const 10) (i32.const 0)))
+(assert_return (invoke "as-br_table-value" (i32.const 0) (i32.const 1)))
+(assert_return (invoke "as-br_table-value" (i32.const 1) (i32.const 1)))
+(assert_return (invoke "as-br_table-value" (i32.const 10) (i32.const 1)))
+
+(assert_return (invoke "as-return-value" (i32.const 0)))
+(assert_return (invoke "as-return-value" (i32.const 1)))
+
+(assert_return (invoke "as-if-then" (i32.const 0) (i32.const 0)))
+(assert_return (invoke "as-if-then" (i32.const 4) (i32.const 0)))
+(assert_return (invoke "as-if-then" (i32.const 0) (i32.const 1)))
+(assert_return (invoke "as-if-then" (i32.const 4) (i32.const 1)))
+(assert_return (invoke "as-if-else" (i32.const 0) (i32.const 0)))
+(assert_return (invoke "as-if-else" (i32.const 3) (i32.const 0)))
+(assert_return (invoke "as-if-else" (i32.const 0) (i32.const 1)))
+(assert_return (invoke "as-if-else" (i32.const 3) (i32.const 1)))
+
+(assert_return (invoke "nested-block-value" (i32.const 0)) (i32.const 21))
+(assert_return (invoke "nested-block-value" (i32.const 1)) (i32.const 9))
+(assert_return (invoke "nested-br-value" (i32.const 0)) (i32.const 5))
+(assert_return (invoke "nested-br-value" (i32.const 1)) (i32.const 9))
+(assert_return (invoke "nested-br_if-value" (i32.const 0)) (i32.const 5))
+(assert_return (invoke "nested-br_if-value" (i32.const 1)) (i32.const 9))
+(assert_return (invoke "nested-br_if-value-cond" (i32.const 0)) (i32.const 5))
+(assert_return (invoke "nested-br_if-value-cond" (i32.const 1)) (i32.const 9))
+(assert_return (invoke "nested-br_table-value" (i32.const 0)) (i32.const 5))
+(assert_return (invoke "nested-br_table-value" (i32.const 1)) (i32.const 9))
+(assert_return (invoke "nested-br_table-value-index" (i32.const 0)) (i32.const 5))
+(assert_return (invoke "nested-br_table-value-index" (i32.const 1)) (i32.const 9))
+
+(assert_invalid
+  (module (func $type-false-i32 (block (i32.ctz (br_if 0 (i32.const 0))))))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-false-i64 (block (i64.ctz (br_if 0 (i32.const 0))))))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-false-f32 (block (f32.neg (br_if 0 (i32.const 0))))))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-false-f64 (block (f64.neg (br_if 0 (i32.const 0))))))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $type-true-i32 (block (i32.ctz (br_if 0 (i32.const 1))))))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-true-i64 (block (i64.ctz (br_if 0 (i64.const 1))))))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-true-f32 (block (f32.neg (br_if 0 (f32.const 1))))))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-true-f64 (block (f64.neg (br_if 0 (i64.const 1))))))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $type-false-arg-void-vs-num (result i32)
+    (block (br_if 0 (i32.const 0)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-true-arg-void-vs-num (result i32)
+    (block (br_if 0 (i32.const 1)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-false-arg-num-vs-num (result i32)
+    (block (br_if 0 (i64.const 1) (i32.const 0)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-true-arg-num-vs-num (result i32)
+    (block (br_if 0 (i64.const 1) (i32.const 0)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $type-cond-void-vs-i32
+    (block (br_if 0 (nop)))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-cond-num-vs-i32
+    (block (br_if 0 (i64.const 0)))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-arg-cond-void-vs-i32 (result i32)
+    (block (br_if 0 (i32.const 0) (nop)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-arg-cond-num-vs-i32 (result i32)
+    (block (br_if 0 (i32.const 0) (i64.const 0)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $unbound-label (br_if 1 (i32.const 1))))
+  "unknown label"
+)
+(assert_invalid
+  (module (func $unbound-nested-label (block (block (br_if 5 (i32.const 1))))))
+  "unknown label"
+)
+(assert_invalid
+  (module (func $large-label (br_if 0x100000001 (i32.const 1))))
+  "unknown label"
+)
+
diff --git a/ml-proto/test/br_table.wast b/ml-proto/test/br_table.wast
new file mode 100644
index 0000000000..4378ea4e76
--- /dev/null
+++ b/ml-proto/test/br_table.wast
@@ -0,0 +1,1334 @@
+;; Test `br_table` operator
+
+(module
+  (func "type-i32" (block (i32.ctz (br_table 0 0 (i32.const 0)))))
+  (func "type-i64" (block (i64.ctz (br_table 0 0 (i32.const 0)))))
+  (func "type-f32" (block (f32.neg (br_table 0 0 (i32.const 0)))))
+  (func "type-f64" (block (f64.neg (br_table 0 0 (i32.const 0)))))
+
+  (func "type-i32-value" (result i32) (block (i32.ctz (br_table 0 0 (i32.const 1) (i32.const 0)))))
+  (func "type-i64-value" (result i64) (block (i64.ctz (br_table 0 0 (i64.const 2) (i32.const 0)))))
+  (func "type-f32-value" (result f32) (block (f32.neg (br_table 0 0 (f32.const 3) (i32.const 0)))))
+  (func "type-f64-value" (result f64) (block (f64.neg (br_table 0 0 (f64.const 4) (i32.const 0)))))
+
+  (func "empty" (param i32) (result i32)
+    (block (br_table 0 (get_local 0)) (return (i32.const 21)))
+    (i32.const 22)
+  )
+  (func "empty-value" (param i32) (result i32)
+    (block (br_table 0 (i32.const 33) (get_local 0)) (i32.const 31))
+  )
+
+  (func "singleton" (param i32) (result i32)
+    (block
+      (block
+        (br_table 1 0 (get_local 0))
+        (return (i32.const 21))
+      )
+      (return (i32.const 20))
+    )
+    (i32.const 22)
+  )
+
+  (func "singleton-value" (param i32) (result i32)
+    (block
+      (block
+        (br_table 0 1 (i32.const 33) (get_local 0))
+        (return (i32.const 31))
+      )
+      (i32.const 32)
+    )
+  )
+
+  (func "multiple" (param i32) (result i32)
+    (block
+      (block
+        (block
+          (block
+            (block
+              (br_table 3 2 1 0 4 (get_local 0))
+              (return (i32.const 99))
+            )
+            (return (i32.const 100))
+          )
+          (return (i32.const 101))
+        )
+        (return (i32.const 102))
+      )
+      (return (i32.const 103))
+    )
+    (i32.const 104)
+  )
+
+  (func "multiple-value" (param i32) (result i32)
+    (local i32)
+    (set_local 1 (block
+      (set_local 1 (block
+        (set_local 1 (block
+          (set_local 1 (block
+            (set_local 1 (block
+              (br_table 3 2 1 0 4 (i32.const 200) (get_local 0))
+              (return (i32.add (get_local 1) (i32.const 99)))
+            ))
+            (return (i32.add (get_local 1) (i32.const 10)))
+          ))
+          (return (i32.add (get_local 1) (i32.const 11)))
+        ))
+        (return (i32.add (get_local 1) (i32.const 12)))
+      ))
+      (return (i32.add (get_local 1) (i32.const 13)))
+    ))
+    (i32.add (get_local 1) (i32.const 14))
+  )
+
+  (func "large" (param i32) (result i32)
+    (block
+      (block
+        (br_table
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
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+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
+          (get_local 0)
+        )
+        (return (i32.const -1))
+      )
+      (return (i32.const 0))
+    )
+    (return (i32.const 1))
+  )
+
+  (func "as-block-first"
+    (block (br_table 0 0 0 (i32.const 0)) (i32.const 2))
+  )
+  (func "as-block-mid"
+    (block (i32.const 1) (br_table 0 0 0 (i32.const 0)) (i32.const 2))
+  )
+  (func "as-block-last"
+    (block (nop) (i32.const 1) (br_table 0 0 0 (i32.const 0)))
+  )
+  (func "as-block-value" (result i32)
+    (block (nop) (i32.const 1) (br_table 0 0 0 (i32.const 2) (i32.const 0)))
+  )
+
+  (func "as-loop-first" (result i32)
+    (loop (br_table 1 0 (i32.const 3) (i32.const 0)) (i32.const 1))
+  )
+  (func "as-loop-mid" (result i32)
+    (loop (i32.const 1) (br_table 1 0 1 (i32.const 4) (i32.const -1)) (i32.const 2))
+  )
+  (func "as-loop-last" (result i32)
+    (loop (nop) (i32.const 1) (br_table 0 1 0 (i32.const 5) (i32.const 1)))
+  )
+
+  (func "as-br-value" (result i32)
+    (block (br 0 (br 0 (i32.const 9))))
+  )
+
+  (func "as-br_if-cond"
+    (block (br_if 0 (br_table 0 0 0 (i32.const 1))))
+  )
+  (func "as-br_if-value" (result i32)
+    (block (br_if 0 (br_table 0 (i32.const 8) (i32.const 0)) (i32.const 1)) (i32.const 7))
+  )
+  (func "as-br_if-value-cond" (result i32)
+    (block (br_if 0 (i32.const 6) (br_table 0 0 (i32.const 9) (i32.const 0))) (i32.const 7))
+  )
+
+  (func "as-br_table-index"
+    (block (br_table 0 0 0 (br_table 0 (i32.const 1))))
+  )
+  (func "as-br_table-value" (result i32)
+    (block (br_table 0 0 0 (br_table 0 (i32.const 10) (i32.const 0)) (i32.const 1)) (i32.const 7))
+  )
+  (func "as-br_table-value-index" (result i32)
+    (block (br_table 0 0 (i32.const 6) (br_table 0 (i32.const 11) (i32.const 1))) (i32.const 7))
+  )
+
+  (func "as-return-value" (result i64)
+    (block (return (br_table 0 (i64.const 7) (i32.const 0))))
+  )
+
+  (func "as-if-cond" (result i32)
+    (block (if (br_table 0 (i32.const 2) (i32.const 0)) (i32.const 0) (i32.const 1)))
+  )
+  (func "as-if-then" (param i32 i32) (result i32)
+    (block (if (get_local 0) (br_table 1 (i32.const 3) (i32.const 0)) (get_local 1)))
+  )
+  (func "as-if-else" (param i32 i32) (result i32)
+    (block (if (get_local 0) (get_local 1) (br_table 1 0 (i32.const 4) (i32.const 0))))
+  )
+
+  (func "as-select-first" (param i32 i32) (result i32)
+    (block (select (br_table 0 (i32.const 5) (i32.const 0)) (get_local 0) (get_local 1)))
+  )
+  (func "as-select-second" (param i32 i32) (result i32)
+    (block (select (get_local 0) (br_table 0 (i32.const 6) (i32.const 1)) (get_local 1)))
+  )
+  (func "as-select-cond" (result i32)
+    (block (select (i32.const 0) (i32.const 1) (br_table 0 (i32.const 7) (i32.const 1))))
+  )
+
+  (func $f (param i32 i32 i32) (result i32) (i32.const -1))
+  (func "as-call-first" (result i32)
+    (block (call $f (br_table 0 (i32.const 12) (i32.const 1)) (i32.const 2) (i32.const 3)))
+  )
+  (func "as-call-mid" (result i32)
+    (block (call $f (i32.const 1) (br_table 0 (i32.const 13) (i32.const 1)) (i32.const 3)))
+  )
+  (func "as-call-last" (result i32)
+    (block (call $f (i32.const 1) (i32.const 2) (br_table 0 (i32.const 14) (i32.const 1))))
+  )
+
+  (import "spectest" "print" (param i32 i32 i32))
+  (func "as-call_import-first"
+    (block (call_import 0 (br_table 0 (i32.const 1)) (i32.const 2) (i32.const 3)))
+  )
+  (func "as-call_import-mid"
+    (block (call_import 0 (i32.const 1) (br_table 0 (i32.const 1)) (i32.const 3)))
+  )
+  (func "as-call_import-last"
+    (block (call_import 0 (i32.const 1) (i32.const 2) (br_table 0 (i32.const 1))))
+  )
+
+  (type $sig (func (param i32 i32 i32) (result i32)))
+  (table $f)
+  (func "as-call_indirect-func" (result i32)
+    (block (call_indirect $sig (br_table 0 (i32.const 20) (i32.const 1)) (i32.const 1) (i32.const 2) (i32.const 3)))
+  )
+  (func "as-call_indirect-first" (result i32)
+    (block (call_indirect $sig (i32.const 0) (br_table 0 (i32.const 21) (i32.const 1)) (i32.const 2) (i32.const 3)))
+  )
+  (func "as-call_indirect-mid" (result i32)
+    (block (call_indirect $sig (i32.const 0) (i32.const 1) (br_table 0 (i32.const 22) (i32.const 1)) (i32.const 3)))
+  )
+  (func "as-call_indirect-last" (result i32)
+    (block (call_indirect $sig (i32.const 0) (i32.const 1) (i32.const 2) (br_table 0 (i32.const 23) (i32.const 1))))
+  )
+
+  (func "as-set_local-value" (result i32) (local f32)
+    (block (set_local 0 (br_table 0 (i32.const 17) (i32.const 1))) (i32.const -1))
+  )
+
+  (memory 1)
+  (func "as-load-address" (result f32)
+    (block (f32.load (br_table 0 (f32.const 1.7) (i32.const 1))))
+  )
+  (func "as-loadN-address" (result i64)
+    (block (i64.load8_s (br_table 0 (i64.const 30) (i32.const 1))))
+  )
+
+  (func "as-store-address" (result i32)
+    (block (f64.store (br_table 0 (i32.const 30) (i32.const 1)) (f64.const 7)) (i32.const -1))
+  )
+  (func "as-store-value" (result i32)
+    (block (i64.store (i32.const 2) (br_table 0 (i32.const 31) (i32.const 1))) (i32.const -1))
+  )
+
+  (func "as-storeN-address" (result i32)
+    (block (i32.store8 (br_table 0 (i32.const 32) (i32.const 0)) (i32.const 7)) (i32.const -1))
+  )
+  (func "as-storeN-value" (result i32)
+    (block (i64.store16 (i32.const 2) (br_table 0 (i32.const 33) (i32.const 0))) (i32.const -1))
+  )
+
+  (func "as-unary-operand" (result f32)
+    (block (f32.neg (br_table 0 (f32.const 3.4) (i32.const 0))))
+  )
+
+  (func "as-binary-left" (result i32)
+    (block (i32.add (br_table 0 0 (i32.const 3) (i32.const 0)) (i32.const 10)))
+  )
+  (func "as-binary-right" (result i64)
+    (block (i64.sub (i64.const 10) (br_table 0 (i64.const 45) (i32.const 0))))
+  )
+
+  (func "as-test-operand" (result i32)
+    (block (i32.eqz (br_table 0 (i32.const 44) (i32.const 0))))
+  )
+
+  (func "as-compare-left" (result i32)
+    (block (f64.le (br_table 0 0 (i32.const 43) (i32.const 0)) (f64.const 10)))
+  )
+  (func "as-compare-right" (result i32)
+    (block (f32.ne (f32.const 10) (br_table 0 (i32.const 42) (i32.const 0))))
+  )
+
+  (func "as-convert-operand" (result i32)
+    (block (i32.wrap/i64 (br_table 0 (i32.const 41) (i32.const 0))))
+  )
+
+  (func "as-grow_memory-size" (result i32)
+    (block (grow_memory (br_table 0 (i32.const 40) (i32.const 0))))
+  )
+
+  (func "nested-block-value" (param i32) (result i32)
+    (block
+      (i32.const -1)
+      (i32.add
+        (i32.const 1)
+        (block
+          (i32.add
+            (i32.const 2)
+            (block
+              (i32.const 4)
+              (i32.add (i32.const 8) (br_table 0 1 2 (i32.const 16) (get_local 0)))
+            )
+          )
+        )
+      )
+    )
+  )
+
+  (func "nested-br-value" (param i32) (result i32)
+    (block
+      (i32.add
+        (i32.const 1)
+        (block
+          (i32.const 2)
+          (block
+            (i32.const 4)
+            (br 0 (br_table 2 1 0 (i32.const 8) (get_local 0)))
+          )
+          (i32.const 16)
+        )
+      )
+    )
+  )
+
+  (func "nested-br_if-value" (param i32) (result i32)
+    (block
+      (i32.add
+        (i32.const 1)
+        (block
+          (i32.const 2)
+          (block
+            (i32.const 4)
+            (br_if 0 (br_table 0 1 2 (i32.const 8) (get_local 0)) (i32.const 1))
+          )
+          (i32.const 16)
+        )
+      )
+    )
+  )
+
+  (func "nested-br_if-value-cond" (param i32) (result i32)
+    (block
+      (i32.add
+        (i32.const 1)
+        (block
+          (i32.const 2)
+          (br_if 0 (i32.const 4) (br_table 0 1 0 (i32.const 8) (get_local 0)))
+          (i32.const 16)
+        )
+      )
+    )
+  )
+
+  (func "nested-br_table-value" (param i32) (result i32)
+    (block
+      (i32.add
+        (i32.const 1)
+        (block
+          (i32.const 2)
+          (block
+            (i32.const 4)
+            (br_table 0 (br_table 0 1 2 (i32.const 8) (get_local 0)) (i32.const 1))
+          )
+          (i32.const 16)
+        )
+      )
+    )
+  )
+
+  (func "nested-br_table-value-index" (param i32) (result i32)
+    (block
+      (i32.add
+        (i32.const 1)
+        (block
+          (i32.const 2)
+          (br_table 0 (i32.const 4) (br_table 0 1 0 (i32.const 8) (get_local 0)))
+          (i32.const 16)
+        )
+      )
+    )
+  )
+)
+
+(assert_return (invoke "type-i32"))
+(assert_return (invoke "type-i64"))
+(assert_return (invoke "type-f32"))
+(assert_return (invoke "type-f64"))
+
+(assert_return (invoke "type-i32-value") (i32.const 1))
+(assert_return (invoke "type-i64-value") (i64.const 2))
+(assert_return (invoke "type-f32-value") (f32.const 3))
+(assert_return (invoke "type-f64-value") (f64.const 4))
+
+(assert_return (invoke "empty" (i32.const 0)) (i32.const 22))
+(assert_return (invoke "empty" (i32.const 1)) (i32.const 22))
+(assert_return (invoke "empty" (i32.const 11)) (i32.const 22))
+(assert_return (invoke "empty" (i32.const -1)) (i32.const 22))
+(assert_return (invoke "empty" (i32.const -100)) (i32.const 22))
+(assert_return (invoke "empty" (i32.const 0xffffffff)) (i32.const 22))
+
+(assert_return (invoke "empty-value" (i32.const 0)) (i32.const 33))
+(assert_return (invoke "empty-value" (i32.const 1)) (i32.const 33))
+(assert_return (invoke "empty-value" (i32.const 11)) (i32.const 33))
+(assert_return (invoke "empty-value" (i32.const -1)) (i32.const 33))
+(assert_return (invoke "empty-value" (i32.const -100)) (i32.const 33))
+(assert_return (invoke "empty-value" (i32.const 0xffffffff)) (i32.const 33))
+
+(assert_return (invoke "singleton" (i32.const 0)) (i32.const 22))
+(assert_return (invoke "singleton" (i32.const 1)) (i32.const 20))
+(assert_return (invoke "singleton" (i32.const 11)) (i32.const 20))
+(assert_return (invoke "singleton" (i32.const -1)) (i32.const 20))
+(assert_return (invoke "singleton" (i32.const -100)) (i32.const 20))
+(assert_return (invoke "singleton" (i32.const 0xffffffff)) (i32.const 20))
+
+(assert_return (invoke "singleton-value" (i32.const 0)) (i32.const 32))
+(assert_return (invoke "singleton-value" (i32.const 1)) (i32.const 33))
+(assert_return (invoke "singleton-value" (i32.const 11)) (i32.const 33))
+(assert_return (invoke "singleton-value" (i32.const -1)) (i32.const 33))
+(assert_return (invoke "singleton-value" (i32.const -100)) (i32.const 33))
+(assert_return (invoke "singleton-value" (i32.const 0xffffffff)) (i32.const 33))
+
+(assert_return (invoke "multiple" (i32.const 0)) (i32.const 103))
+(assert_return (invoke "multiple" (i32.const 1)) (i32.const 102))
+(assert_return (invoke "multiple" (i32.const 2)) (i32.const 101))
+(assert_return (invoke "multiple" (i32.const 3)) (i32.const 100))
+(assert_return (invoke "multiple" (i32.const 4)) (i32.const 104))
+(assert_return (invoke "multiple" (i32.const 5)) (i32.const 104))
+(assert_return (invoke "multiple" (i32.const 6)) (i32.const 104))
+(assert_return (invoke "multiple" (i32.const 10)) (i32.const 104))
+(assert_return (invoke "multiple" (i32.const -1)) (i32.const 104))
+(assert_return (invoke "multiple" (i32.const 0xffffffff)) (i32.const 104))
+
+(assert_return (invoke "multiple-value" (i32.const 0)) (i32.const 213))
+(assert_return (invoke "multiple-value" (i32.const 1)) (i32.const 212))
+(assert_return (invoke "multiple-value" (i32.const 2)) (i32.const 211))
+(assert_return (invoke "multiple-value" (i32.const 3)) (i32.const 210))
+(assert_return (invoke "multiple-value" (i32.const 4)) (i32.const 214))
+(assert_return (invoke "multiple-value" (i32.const 5)) (i32.const 214))
+(assert_return (invoke "multiple-value" (i32.const 6)) (i32.const 214))
+(assert_return (invoke "multiple-value" (i32.const 10)) (i32.const 214))
+(assert_return (invoke "multiple-value" (i32.const -1)) (i32.const 214))
+(assert_return (invoke "multiple-value" (i32.const 0xffffffff)) (i32.const 214))
+
+(assert_return (invoke "large" (i32.const 0)) (i32.const 0))
+(assert_return (invoke "large" (i32.const 1)) (i32.const 1))
+(assert_return (invoke "large" (i32.const 100)) (i32.const 0))
+(assert_return (invoke "large" (i32.const 101)) (i32.const 1))
+(assert_return (invoke "large" (i32.const 10000)) (i32.const 0))
+(assert_return (invoke "large" (i32.const 10001)) (i32.const 1))
+(assert_return (invoke "large" (i32.const 1000000)) (i32.const 1))
+(assert_return (invoke "large" (i32.const 1000001)) (i32.const 1))
+
+(assert_return (invoke "as-block-first"))
+(assert_return (invoke "as-block-mid"))
+(assert_return (invoke "as-block-last"))
+(assert_return (invoke "as-block-value") (i32.const 2))
+
+(assert_return (invoke "as-loop-first") (i32.const 3))
+(assert_return (invoke "as-loop-mid") (i32.const 4))
+(assert_return (invoke "as-loop-last") (i32.const 5))
+
+(assert_return (invoke "as-br-value") (i32.const 9))
+
+(assert_return (invoke "as-br_if-cond"))
+(assert_return (invoke "as-br_if-value") (i32.const 8))
+(assert_return (invoke "as-br_if-value-cond") (i32.const 9))
+
+(assert_return (invoke "as-br_table-index"))
+(assert_return (invoke "as-br_table-value") (i32.const 10))
+(assert_return (invoke "as-br_table-value-index") (i32.const 11))
+
+(assert_return (invoke "as-return-value") (i64.const 7))
+
+(assert_return (invoke "as-if-cond") (i32.const 2))
+(assert_return (invoke "as-if-then" (i32.const 1) (i32.const 6)) (i32.const 3))
+(assert_return (invoke "as-if-then" (i32.const 0) (i32.const 6)) (i32.const 6))
+(assert_return (invoke "as-if-else" (i32.const 0) (i32.const 6)) (i32.const 4))
+(assert_return (invoke "as-if-else" (i32.const 1) (i32.const 6)) (i32.const 6))
+
+(assert_return (invoke "as-select-first" (i32.const 0) (i32.const 6)) (i32.const 5))
+(assert_return (invoke "as-select-first" (i32.const 1) (i32.const 6)) (i32.const 5))
+(assert_return (invoke "as-select-second" (i32.const 0) (i32.const 6)) (i32.const 6))
+(assert_return (invoke "as-select-second" (i32.const 1) (i32.const 6)) (i32.const 6))
+(assert_return (invoke "as-select-cond") (i32.const 7))
+
+(assert_return (invoke "as-call-first") (i32.const 12))
+(assert_return (invoke "as-call-mid") (i32.const 13))
+(assert_return (invoke "as-call-last") (i32.const 14))
+
+(assert_return (invoke "as-call_import-first"))
+(assert_return (invoke "as-call_import-mid"))
+(assert_return (invoke "as-call_import-last"))
+
+(assert_return (invoke "as-call_indirect-func") (i32.const 20))
+(assert_return (invoke "as-call_indirect-first") (i32.const 21))
+(assert_return (invoke "as-call_indirect-mid") (i32.const 22))
+(assert_return (invoke "as-call_indirect-last") (i32.const 23))
+
+(assert_return (invoke "as-set_local-value") (i32.const 17))
+
+(assert_return (invoke "as-load-address") (f32.const 1.7))
+(assert_return (invoke "as-loadN-address") (i64.const 30))
+
+(assert_return (invoke "as-store-address") (i32.const 30))
+(assert_return (invoke "as-store-value") (i32.const 31))
+(assert_return (invoke "as-storeN-address") (i32.const 32))
+(assert_return (invoke "as-storeN-value") (i32.const 33))
+
+(assert_return (invoke "as-unary-operand") (f32.const 3.4))
+
+(assert_return (invoke "as-binary-left") (i32.const 3))
+(assert_return (invoke "as-binary-right") (i64.const 45))
+
+(assert_return (invoke "as-test-operand") (i32.const 44))
+
+(assert_return (invoke "as-compare-left") (i32.const 43))
+(assert_return (invoke "as-compare-right") (i32.const 42))
+
+(assert_return (invoke "as-convert-operand") (i32.const 41))
+
+(assert_return (invoke "as-grow_memory-size") (i32.const 40))
+
+(assert_return (invoke "nested-block-value" (i32.const 0)) (i32.const 19))
+(assert_return (invoke "nested-block-value" (i32.const 1)) (i32.const 17))
+(assert_return (invoke "nested-block-value" (i32.const 2)) (i32.const 16))
+(assert_return (invoke "nested-block-value" (i32.const 10)) (i32.const 16))
+(assert_return (invoke "nested-block-value" (i32.const -1)) (i32.const 16))
+(assert_return (invoke "nested-block-value" (i32.const 100000)) (i32.const 16))
+
+(assert_return (invoke "nested-br-value" (i32.const 0)) (i32.const 8))
+(assert_return (invoke "nested-br-value" (i32.const 1)) (i32.const 9))
+(assert_return (invoke "nested-br-value" (i32.const 2)) (i32.const 17))
+(assert_return (invoke "nested-br-value" (i32.const 11)) (i32.const 17))
+(assert_return (invoke "nested-br-value" (i32.const -4)) (i32.const 17))
+(assert_return (invoke "nested-br-value" (i32.const 10213210)) (i32.const 17))
+
+(assert_return (invoke "nested-br_if-value" (i32.const 0)) (i32.const 17))
+(assert_return (invoke "nested-br_if-value" (i32.const 1)) (i32.const 9))
+(assert_return (invoke "nested-br_if-value" (i32.const 2)) (i32.const 8))
+(assert_return (invoke "nested-br_if-value" (i32.const 9)) (i32.const 8))
+(assert_return (invoke "nested-br_if-value" (i32.const -9)) (i32.const 8))
+(assert_return (invoke "nested-br_if-value" (i32.const 999999)) (i32.const 8))
+
+(assert_return (invoke "nested-br_if-value-cond" (i32.const 0)) (i32.const 9))
+(assert_return (invoke "nested-br_if-value-cond" (i32.const 1)) (i32.const 8))
+(assert_return (invoke "nested-br_if-value-cond" (i32.const 2)) (i32.const 9))
+(assert_return (invoke "nested-br_if-value-cond" (i32.const 3)) (i32.const 9))
+(assert_return (invoke "nested-br_if-value-cond" (i32.const -1000000)) (i32.const 9))
+(assert_return (invoke "nested-br_if-value-cond" (i32.const 9423975)) (i32.const 9))
+
+(assert_return (invoke "nested-br_table-value" (i32.const 0)) (i32.const 17))
+(assert_return (invoke "nested-br_table-value" (i32.const 1)) (i32.const 9))
+(assert_return (invoke "nested-br_table-value" (i32.const 2)) (i32.const 8))
+(assert_return (invoke "nested-br_table-value" (i32.const 9)) (i32.const 8))
+(assert_return (invoke "nested-br_table-value" (i32.const -9)) (i32.const 8))
+(assert_return (invoke "nested-br_table-value" (i32.const 999999)) (i32.const 8))
+
+(assert_return (invoke "nested-br_table-value-index" (i32.const 0)) (i32.const 9))
+(assert_return (invoke "nested-br_table-value-index" (i32.const 1)) (i32.const 8))
+(assert_return (invoke "nested-br_table-value-index" (i32.const 2)) (i32.const 9))
+(assert_return (invoke "nested-br_table-value-index" (i32.const 3)) (i32.const 9))
+(assert_return (invoke "nested-br_table-value-index" (i32.const -1000000)) (i32.const 9))
+(assert_return (invoke "nested-br_table-value-index" (i32.const 9423975)) (i32.const 9))
+
+(assert_invalid
+  (module (func $type-arg-void-vs-num (result i32)
+    (block (br_table 0 (i32.const 1)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-arg-num-vs-num (result i32)
+    (block (br_table 0 0 0 (i64.const 1) (i32.const 1)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $type-index-void-vs-i32
+    (block (br_table 0 0 0 (nop)))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-index-num-vs-i32
+    (block (br_table 0 (i64.const 0)))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-arg-index-void-vs-i32 (result i32)
+    (block (br_table 0 0 (i32.const 0) (nop)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-arg-index-num-vs-i32 (result i32)
+    (block (br_table 0 0 (i32.const 0) (i64.const 0)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $unbound-label
+    (block (br_table 2 1 (i32.const 1)))
+  ))
+  "unknown label"
+)
+(assert_invalid
+  (module (func $unbound-nested-label
+    (block (block (br_table 0 5 (i32.const 1))))
+  ))
+  "unknown label"
+)
+(assert_invalid
+  (module (func $large-label
+    (block (br_table 0 0x100000001 0 (i32.const 1)))
+  ))
+  "unknown label"
+)
+
+(assert_invalid
+  (module (func $unbound-label-default
+    (block (br_table 1 2 (i32.const 1)))
+  ))
+  "unknown label"
+)
+(assert_invalid
+  (module (func $unbound-nested-label-default
+    (block (block (br_table 0 5 (i32.const 1))))
+  ))
+  "unknown label"
+)
+(assert_invalid
+  (module (func $large-label-default
+    (block (br_table 0 0 0x100000001 (i32.const 1)))
+  ))
+  "unknown label"
+)
+
diff --git a/ml-proto/test/loop.wast b/ml-proto/test/loop.wast
index e4c6581eaf..13e9e1ccf3 100644
--- a/ml-proto/test/loop.wast
+++ b/ml-proto/test/loop.wast
@@ -1,6 +1,8 @@
 ;; Test `loop` opcode
 
 (module
+  (func $dummy)
+
   (func "empty"
     (loop)
     (loop $l)
@@ -11,14 +13,13 @@
     (loop (i32.const 7))
   )
 
-  (func $nop)
   (func "multi" (result i32)
-    (loop (call $nop) (call $nop) (call $nop) (call $nop))
-    (loop (call $nop) (call $nop) (call $nop) (i32.const 8))
+    (loop (call $dummy) (call $dummy) (call $dummy) (call $dummy))
+    (loop (call $dummy) (call $dummy) (call $dummy) (i32.const 8))
   )
 
   (func "nested" (result i32)
-    (loop (loop (call $nop) (block) (nop)) (loop (call $nop) (i32.const 9)))
+    (loop (loop (call $dummy) (block) (nop)) (loop (call $dummy) (i32.const 9)))
   )
 
   (func "deep" (result i32)
@@ -26,24 +27,24 @@
       (loop (block (loop (block (loop (block (loop (block (loop (block
         (loop (block (loop (block (loop (block (loop (block (loop (block
           (loop (block (loop (block (loop (block (loop (block (loop (block
-            (loop (block (loop (block (loop (call $nop) (i32.const 150))))))
+            (loop (block (loop (block (loop (call $dummy) (i32.const 150))))))
           ))))))))))
         ))))))))))
       ))))))))))
     ))))))))))
   )
 
-  (func "unary-operand" (result i32)
-    (i32.ctz (loop (call $nop) (i32.const 13)))
+  (func "as-unary-operand" (result i32)
+    (i32.ctz (loop (call $dummy) (i32.const 13)))
   )
-  (func "binary-operand" (result i32)
-    (i32.mul (loop (call $nop) (i32.const 3)) (loop (call $nop) (i32.const 4)))
+  (func "as-binary-operand" (result i32)
+    (i32.mul (loop (call $dummy) (i32.const 3)) (loop (call $dummy) (i32.const 4)))
   )
-  (func "test-operand" (result i32)
-    (i32.eqz (loop (call $nop) (i32.const 13)))
+  (func "as-test-operand" (result i32)
+    (i32.eqz (loop (call $dummy) (i32.const 13)))
   )
-  (func "compare-operand" (result i32)
-    (f32.gt (loop (call $nop) (f32.const 3)) (loop (call $nop) (f32.const 3)))
+  (func "as-compare-operand" (result i32)
+    (f32.gt (loop (call $dummy) (f32.const 3)) (loop (call $dummy) (f32.const 3)))
   )
 
   (func "break-bare" (result i32)
@@ -88,18 +89,18 @@
   )
 
   (func "drop-mid" (result i32)
-    (loop (call $fx) (i32.const 7) (call $nop) (i32.const 8))
+    (loop (call $fx) (i32.const 7) (call $dummy) (i32.const 8))
   )
   (func "drop-last"
-    (loop (call $nop) (call $fx) (nop) (i32.const 8))
+    (loop (call $dummy) (call $fx) (nop) (i32.const 8))
   )
   (func "drop-break-void"
     (loop (br 1 (nop)))
-    (loop (br 1 (call $nop)))
+    (loop (br 1 (call $dummy)))
     (loop (br_if 1 (nop) (i32.const 0)))
     (loop (br_if 1 (nop) (i32.const 1)))
-    (loop (br_if 1 (call $nop) (i32.const 0)))
-    (loop (br_if 1 (call $nop) (i32.const 1)))
+    (loop (br_if 1 (call $dummy) (i32.const 0)))
+    (loop (br_if 1 (call $dummy) (i32.const 1)))
     (loop (br_table 1 (nop) (i32.const 3)))
     (loop (br_table 1 1 1 (nop) (i32.const 1)))
   )
@@ -112,11 +113,11 @@
   )
   (func "drop-cont-void"
     (loop (br 0 (nop)))
-    (loop (br 0 (call $nop)))
+    (loop (br 0 (call $dummy)))
     (loop (br_if 0 (nop) (i32.const 0)))
     (loop (br_if 0 (nop) (i32.const 1)))
-    (loop (br_if 0 (call $nop) (i32.const 0)))
-    (loop (br_if 0 (call $nop) (i32.const 1)))
+    (loop (br_if 0 (call $dummy) (i32.const 0)))
+    (loop (br_if 0 (call $dummy) (i32.const 1)))
     (loop (br_table 0 (nop) (i32.const 3)))
     (loop (br_table 0 1 1 (nop) (i32.const 1)))
   )
@@ -208,10 +209,10 @@
 (assert_return (invoke "nested") (i32.const 9))
 (assert_return (invoke "deep") (i32.const 150))
 
-(assert_return (invoke "unary-operand") (i32.const 0))
-(assert_return (invoke "binary-operand") (i32.const 12))
-(assert_return (invoke "test-operand") (i32.const 0))
-(assert_return (invoke "compare-operand") (i32.const 0))
+(assert_return (invoke "as-unary-operand") (i32.const 0))
+(assert_return (invoke "as-binary-operand") (i32.const 12))
+(assert_return (invoke "as-test-operand") (i32.const 0))
+(assert_return (invoke "as-compare-operand") (i32.const 0))
 
 (assert_return (invoke "break-bare") (i32.const 19))
 (assert_return (invoke "break-value") (i32.const 18))
@@ -258,43 +259,100 @@
 (assert_return (invoke "nesting" (f32.const 7) (f32.const 101)) (f32.const 2601))
 
 (assert_invalid
-  (module (func (result i32) (loop)))
+  (module (func $type-empty-i32 (result i32) (loop)))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-empty-i64 (result i64) (loop)))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-empty-f32 (result f32) (loop)))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-empty-f64 (result f64) (loop)))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $type-value-void-vs-num (result i32)
+    (loop (nop))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (loop (nop))))
+  (module (func $type-value-num-vs-num (result i32)
+    (loop (f32.const 0))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (loop (f32.const 0))))
+  (module (func $type-value-void-vs-num-after-break (result i32)
+    (loop (br 1 (i32.const 1)) (nop))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (loop (br 1) (i32.const 1))))
+  (module (func $type-value-num-vs-num-after-break (result i32)
+    (loop (br 1 (i32.const 1)) (f32.const 0))
+  ))
   "type mismatch"
 )
+
 (assert_invalid
-  (module (func (result i32) (loop (br 1 (i32.const 1)) (nop))))
+  (module (func $type-break-last-void-vs-num (result i32)
+    (loop (br 1))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (loop (br 1 (i64.const 1)) (i32.const 1))))
+  (module (func $type-break-void-vs-num (result i32)
+    (loop (br 1) (i32.const 1))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (loop (br 1 (i64.const 1)) (br 1 (i32.const 1)))))
+  (module (func $type-break-num-vs-num (result i32)
+    (loop (br 1 (i64.const 1)) (i32.const 1))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-break-first-num-vs-num (result i32)
+    (loop (br 1 (i64.const 1)) (br 1 (i32.const 1)))
+  ))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-break-second-num-vs-num (result i32)
+    (loop (br 1 (i32.const 1)) (br 1 (f64.const 1)))
+  ))
+  "type mismatch"
+)
+
+(assert_invalid
+  (module (func $type-break-nested-void-vs-num (result i32)
+    (loop (loop (br 3)) (br 1 (i32.const 1)))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (loop (loop (br 3 (i64.const 1))) (br 1 (i32.const 1)))))
+  (module (func $type-break-nested-num-vs-num (result i32)
+    (loop (loop (br 3 (i64.const 1))) (br 1 (i32.const 1)))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (loop (br 1))))
+  (module (func $type-break-operand-void-vs-num (result i32)
+    (i32.ctz (loop (br 1)))
+  ))
   "type mismatch"
 )
 (assert_invalid
-  (module (func (result i32) (i32.ctz (loop (br 1)))))
+  (module (func $type-break-operand-num-vs-num (result i32)
+    (i64.ctz (loop (br 1 (i64.const 9))))
+  ))
   "type mismatch"
 )
 
diff --git a/ml-proto/test/nop.wast b/ml-proto/test/nop.wast
index 9dc86fcd18..8d4898f5f5 100644
--- a/ml-proto/test/nop.wast
+++ b/ml-proto/test/nop.wast
@@ -1,20 +1,101 @@
 ;; Test `nop` operator.
 
 (module
-  (func "eval"
-    (nop)
+  (func $dummy)
+
+  (func "as-func-first" (result i32)
+    (nop) (i32.const 1)
+  )
+  (func "as-func-mid" (result i32)
+    (call $dummy) (nop) (i32.const 2)
+  )
+  (func "as-func-last"
+    (call $dummy) (nop)
+  )
+
+  (func "as-block-first" (result i32)
+    (block (nop) (i32.const 2))
+  )
+  (func "as-block-mid" (result i32)
+    (block (call $dummy) (nop) (i32.const 2))
+  )
+  (func "as-block-last"
+    (block (nop) (call $dummy) (nop))
+  )
+
+  (func "as-loop-first" (result i32)
+    (loop (nop) (i32.const 2))
+  )
+  (func "as-loop-mid" (result i32)
+    (loop (call $dummy) (nop) (i32.const 2))
+  )
+  (func "as-loop-last"
+    (loop (call $dummy) (nop))
+  )
+
+  (func "as-br-value"
+    (block (br 0 (nop)))
+  )
+  (func "as-br_if-value" (param i32)
+    (block (br_if 0 (nop) (get_local 0)))
+  )
+  (func "as-br_table-value" (param i32)
+    (block (br_table 0 0 0 (nop) (get_local 0)))
+  )
+
+  (func "as-return-value"
+    (block (return (nop)))
   )
 
-  (func "drop" (result i32)
-    (nop)
-    (i32.const 1)
+  (func "as-if-then" (param i32)
+    (block (if (get_local 0) (nop) (call $dummy)))
+  )
+  (func "as-if-else" (param i32)
+    (block (if (get_local 0) (call $dummy) (nop)))
   )
 )
 
-(assert_return (invoke "eval"))
-(assert_return (invoke "drop") (i32.const 1))
+(assert_return (invoke "as-func-first") (i32.const 1))
+(assert_return (invoke "as-func-mid") (i32.const 2))
+(assert_return (invoke "as-func-last"))
+
+(assert_return (invoke "as-block-first") (i32.const 2))
+(assert_return (invoke "as-block-mid") (i32.const 2))
+(assert_return (invoke "as-block-last"))
+
+(assert_return (invoke "as-loop-first") (i32.const 2))
+(assert_return (invoke "as-loop-mid") (i32.const 2))
+(assert_return (invoke "as-loop-last"))
+
+(assert_return (invoke "as-br-value"))
+
+(assert_return (invoke "as-br_if-value" (i32.const 0)))
+(assert_return (invoke "as-br_if-value" (i32.const 10)))
 
+(assert_return (invoke "as-br_table-value" (i32.const 0)))
+(assert_return (invoke "as-br_table-value" (i32.const 1)))
+(assert_return (invoke "as-br_table-value" (i32.const 10)))
+
+(assert_return (invoke "as-return-value"))
+
+(assert_return (invoke "as-if-then" (i32.const 0)))
+(assert_return (invoke "as-if-then" (i32.const 4)))
+(assert_return (invoke "as-if-else" (i32.const 0)))
+(assert_return (invoke "as-if-else" (i32.const 3)))
+
+(assert_invalid
+  (module (func $type-i32 (result i32) (nop)))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-i64 (result i64) (nop)))
+  "type mismatch"
+)
+(assert_invalid
+  (module (func $type-f32 (result f32) (nop)))
+  "type mismatch"
+)
 (assert_invalid
-  (module (func (result i32) (nop)))
+  (module (func $type-f64 (result f64) (nop)))
   "type mismatch"
 )
diff --git a/ml-proto/test/unreachable.wast b/ml-proto/test/unreachable.wast
index 064d5a087b..446940f796 100644
--- a/ml-proto/test/unreachable.wast
+++ b/ml-proto/test/unreachable.wast
@@ -1,191 +1,193 @@
 ;; Test `unreachable` operator
 
 (module
+  (func $dummy)
+
   (func "type-i32" (result i32) (unreachable))
   (func "type-i64" (result i32) (unreachable))
   (func "type-f32" (result f64) (unreachable))
   (func "type-f64" (result f64) (unreachable))
 
-  (func "first" (result i32)
+  (func "as-func-first" (result i32)
     (unreachable) (i32.const -1)
   )
-  (func "mid" (result i32)
-    (f32.const 1) (unreachable) (i32.const -1)
+  (func "as-func-mid" (result i32)
+    (call $dummy) (unreachable) (i32.const -1)
   )
-  (func "last"
-    (i64.const 8) (unreachable)
+  (func "as-func-last"
+    (call $dummy) (unreachable)
   )
-  (func "value" (result i32)
-    (i64.const 8) (unreachable)
+  (func "as-func-value" (result i32)
+    (call $dummy) (unreachable)
   )
 
-  (func "block-first" (result i32)
+  (func "as-block-first" (result i32)
     (block (unreachable) (i32.const 2))
   )
-  (func "block-mid" (result i32)
-    (block (i32.const 1) (unreachable) (i32.const 2))
+  (func "as-block-mid" (result i32)
+    (block (call $dummy) (unreachable) (i32.const 2))
   )
-  (func "block-last"
-    (block (nop) (i32.const 1) (unreachable))
+  (func "as-block-last"
+    (block (nop) (call $dummy) (unreachable))
   )
-  (func "block-value" (result i32)
-    (block (nop) (i32.const 1) (unreachable))
+  (func "as-block-value" (result i32)
+    (block (nop) (call $dummy) (unreachable))
   )
-  (func "block-broke" (result i32)
-    (block (br 0 (i32.const 1)) (unreachable))
+  (func "as-block-broke" (result i32)
+    (block (call $dummy) (br 0 (i32.const 1)) (unreachable))
   )
 
-  (func "loop-first" (result i32)
+  (func "as-loop-first" (result i32)
     (loop (unreachable) (i32.const 2))
   )
-  (func "loop-mid" (result i32)
-    (loop (i32.const 1) (unreachable) (i32.const 2))
+  (func "as-loop-mid" (result i32)
+    (loop (call $dummy) (unreachable) (i32.const 2))
   )
-  (func "loop-last"
-    (loop (nop) (i32.const 1) (unreachable))
+  (func "as-loop-last"
+    (loop (nop) (call $dummy) (unreachable))
   )
-  (func "loop-broke" (result i32)
-    (loop (br 1 (i32.const 1)) (unreachable))
+  (func "as-loop-broke" (result i32)
+    (loop (call $dummy) (br 1 (i32.const 1)) (unreachable))
   )
 
-  (func "br-value" (result i32)
+  (func "as-br-value" (result i32)
     (block (br 0 (unreachable)))
   )
 
-  (func "br_if-cond"
+  (func "as-br_if-cond"
     (block (br_if 0 (unreachable)))
   )
-  (func "br_if-value" (result i32)
+  (func "as-br_if-value" (result i32)
     (block (br_if 0 (unreachable) (i32.const 1)) (i32.const 7))
   )
-  (func "br_if-value-cond" (result i32)
+  (func "as-br_if-value-cond" (result i32)
     (block (br_if 0 (i32.const 6) (unreachable)) (i32.const 7))
   )
 
-  (func "br_table-index"
+  (func "as-br_table-index"
     (block (br_table 0 0 0 (unreachable)))
   )
-  (func "br_table-value" (result i32)
+  (func "as-br_table-value" (result i32)
     (block (br_table 0 0 0 (unreachable) (i32.const 1)) (i32.const 7))
   )
-  (func "br_table-value-index" (result i32)
+  (func "as-br_table-value-index" (result i32)
     (block (br_table 0 0 (i32.const 6) (unreachable)) (i32.const 7))
   )
 
-  (func "return-value" (result i64)
+  (func "as-return-value" (result i64)
     (return (unreachable))
   )
 
-  (func "if-cond" (result i32)
+  (func "as-if-cond" (result i32)
     (if (unreachable) (i32.const 0) (i32.const 1))
   )
-  (func "if-then" (param i32 i32) (result i32)
+  (func "as-if-then" (param i32 i32) (result i32)
     (if (get_local 0) (unreachable) (get_local 1))
   )
-  (func "if-else" (param i32 i32) (result i32)
+  (func "as-if-else" (param i32 i32) (result i32)
     (if (get_local 0) (get_local 1) (unreachable))
   )
 
-  (func "select-first" (param i32 i32) (result i32)
+  (func "as-select-first" (param i32 i32) (result i32)
     (select (unreachable) (get_local 0) (get_local 1))
   )
-  (func "select-second" (param i32 i32) (result i32)
+  (func "as-select-second" (param i32 i32) (result i32)
     (select (get_local 0) (unreachable) (get_local 1))
   )
-  (func "select-cond" (result i32)
+  (func "as-select-cond" (result i32)
     (select (i32.const 0) (i32.const 1) (unreachable))
   )
 
-  (func $nop (param i32 i32 i32))
-  (func "call-first"
-    (call $nop (unreachable) (i32.const 2) (i32.const 3))
+  (func $dummy3 (param i32 i32 i32))
+  (func "as-call-first"
+    (call $dummy3 (unreachable) (i32.const 2) (i32.const 3))
   )
-  (func "call-mid"
-    (call $nop (i32.const 1) (unreachable) (i32.const 3))
+  (func "as-call-mid"
+    (call $dummy3 (i32.const 1) (unreachable) (i32.const 3))
   )
-  (func "call-last"
-    (call $nop (i32.const 1) (i32.const 2) (unreachable))
+  (func "as-call-last"
+    (call $dummy3 (i32.const 1) (i32.const 2) (unreachable))
   )
 
   (import "spectest" "print" (param i32 i32 i32))
-  (func "call_import-first"
+  (func "as-call_import-first"
     (call_import 0 (unreachable) (i32.const 2) (i32.const 3))
   )
-  (func "call_import-mid"
+  (func "as-call_import-mid"
     (call_import 0 (i32.const 1) (unreachable) (i32.const 3))
   )
-  (func "call_import-last"
+  (func "as-call_import-last"
     (call_import 0 (i32.const 1) (i32.const 2) (unreachable))
   )
 
   (type $sig (func (param i32 i32 i32)))
-  (table $nop)
-  (func "call_indirect-func"
+  (table $dummy3)
+  (func "as-call_indirect-func"
     (call_indirect $sig (unreachable) (i32.const 1) (i32.const 2) (i32.const 3))
   )
-  (func "call_indirect-first"
+  (func "as-call_indirect-first"
     (call_indirect $sig (i32.const 0) (unreachable) (i32.const 2) (i32.const 3))
   )
-  (func "call_indirect-mid"
+  (func "as-call_indirect-mid"
     (call_indirect $sig (i32.const 0) (i32.const 1) (unreachable) (i32.const 3))
   )
-  (func "call_indirect-last"
+  (func "as-call_indirect-last"
     (call_indirect $sig (i32.const 0) (i32.const 1) (i32.const 2) (unreachable))
   )
 
-  (func "set_local-value" (local f32)
+  (func "as-set_local-value" (local f32)
     (set_local 0 (unreachable))
   )
 
   (memory 1)
-  (func "load-address" (result f32)
+  (func "as-load-address" (result f32)
     (f32.load (unreachable))
   )
-  (func "loadN-address" (result i64)
+  (func "as-loadN-address" (result i64)
     (i64.load8_s (unreachable))
   )
 
-  (func "store-address"
+  (func "as-store-address"
     (f64.store (unreachable) (f64.const 7))
   )
-  (func "store-value"
+  (func "as-store-value"
     (i64.store (i32.const 2) (unreachable))
   )
 
-  (func "storeN-address"
+  (func "as-storeN-address"
     (i32.store8 (unreachable) (i32.const 7))
   )
-  (func "storeN-value"
+  (func "as-storeN-value"
     (i64.store16 (i32.const 2) (unreachable))
   )
 
-  (func "unary-operand" (result f32)
+  (func "as-unary-operand" (result f32)
     (f32.neg (unreachable))
   )
 
-  (func "binary-left" (result i32)
+  (func "as-binary-left" (result i32)
     (i32.add (unreachable) (i32.const 10))
   )
-  (func "binary-right" (result i64)
+  (func "as-binary-right" (result i64)
     (i64.sub (i64.const 10) (unreachable))
   )
 
-  (func "test-operand" (result i32)
+  (func "as-test-operand" (result i32)
     (i32.eqz (unreachable))
   )
 
-  (func "compare-left" (result i32)
+  (func "as-compare-left" (result i32)
     (f64.le (unreachable) (f64.const 10))
   )
-  (func "compare-right" (result i32)
+  (func "as-compare-right" (result i32)
     (f32.ne (f32.const 10) (unreachable))
   )
 
-  (func "convert-operand" (result i32)
+  (func "as-convert-operand" (result i32)
     (i32.wrap/i64 (unreachable))
   )
 
-  (func "grow_memory-size" (result i32)
+  (func "as-grow_memory-size" (result i32)
     (grow_memory (unreachable))
   )
 )
@@ -195,80 +197,80 @@
 (assert_trap (invoke "type-f32") "unreachable")
 (assert_trap (invoke "type-f64") "unreachable")
 
-(assert_trap (invoke "first") "unreachable")
-(assert_trap (invoke "mid") "unreachable")
-(assert_trap (invoke "last") "unreachable")
-(assert_trap (invoke "value") "unreachable")
+(assert_trap (invoke "as-func-first") "unreachable")
+(assert_trap (invoke "as-func-mid") "unreachable")
+(assert_trap (invoke "as-func-last") "unreachable")
+(assert_trap (invoke "as-func-value") "unreachable")
 
-(assert_trap (invoke "block-first") "unreachable")
-(assert_trap (invoke "block-mid") "unreachable")
-(assert_trap (invoke "block-last") "unreachable")
-(assert_trap (invoke "block-value") "unreachable")
-(assert_return (invoke "block-broke") (i32.const 1))
+(assert_trap (invoke "as-block-first") "unreachable")
+(assert_trap (invoke "as-block-mid") "unreachable")
+(assert_trap (invoke "as-block-last") "unreachable")
+(assert_trap (invoke "as-block-value") "unreachable")
+(assert_return (invoke "as-block-broke") (i32.const 1))
 
-(assert_trap (invoke "loop-first") "unreachable")
-(assert_trap (invoke "loop-mid") "unreachable")
-(assert_trap (invoke "loop-last") "unreachable")
-(assert_return (invoke "loop-broke") (i32.const 1))
+(assert_trap (invoke "as-loop-first") "unreachable")
+(assert_trap (invoke "as-loop-mid") "unreachable")
+(assert_trap (invoke "as-loop-last") "unreachable")
+(assert_return (invoke "as-loop-broke") (i32.const 1))
 
-(assert_trap (invoke "br-value") "unreachable")
+(assert_trap (invoke "as-br-value") "unreachable")
 
-(assert_trap (invoke "br_if-cond") "unreachable")
-(assert_trap (invoke "br_if-value") "unreachable")
-(assert_trap (invoke "br_if-value-cond") "unreachable")
+(assert_trap (invoke "as-br_if-cond") "unreachable")
+(assert_trap (invoke "as-br_if-value") "unreachable")
+(assert_trap (invoke "as-br_if-value-cond") "unreachable")
 
-(assert_trap (invoke "br_table-index") "unreachable")
-(assert_trap (invoke "br_table-value") "unreachable")
-(assert_trap (invoke "br_table-value-index") "unreachable")
+(assert_trap (invoke "as-br_table-index") "unreachable")
+(assert_trap (invoke "as-br_table-value") "unreachable")
+(assert_trap (invoke "as-br_table-value-index") "unreachable")
 
-(assert_trap (invoke "return-value") "unreachable")
+(assert_trap (invoke "as-return-value") "unreachable")
 
-(assert_trap (invoke "if-cond") "unreachable")
-(assert_trap (invoke "if-then" (i32.const 1) (i32.const 6)) "unreachable")
-(assert_return (invoke "if-then" (i32.const 0) (i32.const 6)) (i32.const 6))
-(assert_trap (invoke "if-else" (i32.const 0) (i32.const 6)) "unreachable")
-(assert_return (invoke "if-else" (i32.const 1) (i32.const 6)) (i32.const 6))
+(assert_trap (invoke "as-if-cond") "unreachable")
+(assert_trap (invoke "as-if-then" (i32.const 1) (i32.const 6)) "unreachable")
+(assert_return (invoke "as-if-then" (i32.const 0) (i32.const 6)) (i32.const 6))
+(assert_trap (invoke "as-if-else" (i32.const 0) (i32.const 6)) "unreachable")
+(assert_return (invoke "as-if-else" (i32.const 1) (i32.const 6)) (i32.const 6))
 
-(assert_trap (invoke "select-first" (i32.const 0) (i32.const 6)) "unreachable")
-(assert_trap (invoke "select-first" (i32.const 1) (i32.const 6)) "unreachable")
-(assert_trap (invoke "select-second" (i32.const 0) (i32.const 6)) "unreachable")
-(assert_trap (invoke "select-second" (i32.const 1) (i32.const 6)) "unreachable")
-(assert_trap (invoke "select-cond") "unreachable")
+(assert_trap (invoke "as-select-first" (i32.const 0) (i32.const 6)) "unreachable")
+(assert_trap (invoke "as-select-first" (i32.const 1) (i32.const 6)) "unreachable")
+(assert_trap (invoke "as-select-second" (i32.const 0) (i32.const 6)) "unreachable")
+(assert_trap (invoke "as-select-second" (i32.const 1) (i32.const 6)) "unreachable")
+(assert_trap (invoke "as-select-cond") "unreachable")
 
-(assert_trap (invoke "call-first") "unreachable")
-(assert_trap (invoke "call-mid") "unreachable")
-(assert_trap (invoke "call-last") "unreachable")
+(assert_trap (invoke "as-call-first") "unreachable")
+(assert_trap (invoke "as-call-mid") "unreachable")
+(assert_trap (invoke "as-call-last") "unreachable")
 
-(assert_trap (invoke "call_import-first") "unreachable")
-(assert_trap (invoke "call_import-mid") "unreachable")
-(assert_trap (invoke "call_import-last") "unreachable")
+(assert_trap (invoke "as-call_import-first") "unreachable")
+(assert_trap (invoke "as-call_import-mid") "unreachable")
+(assert_trap (invoke "as-call_import-last") "unreachable")
 
-(assert_trap (invoke "call_indirect-func") "unreachable")
-(assert_trap (invoke "call_indirect-first") "unreachable")
-(assert_trap (invoke "call_indirect-mid") "unreachable")
-(assert_trap (invoke "call_indirect-last") "unreachable")
+(assert_trap (invoke "as-call_indirect-func") "unreachable")
+(assert_trap (invoke "as-call_indirect-first") "unreachable")
+(assert_trap (invoke "as-call_indirect-mid") "unreachable")
+(assert_trap (invoke "as-call_indirect-last") "unreachable")
 
-(assert_trap (invoke "set_local-value") "unreachable")
+(assert_trap (invoke "as-set_local-value") "unreachable")
 
-(assert_trap (invoke "load-address") "unreachable")
-(assert_trap (invoke "loadN-address") "unreachable")
+(assert_trap (invoke "as-load-address") "unreachable")
+(assert_trap (invoke "as-loadN-address") "unreachable")
 
-(assert_trap (invoke "store-address") "unreachable")
-(assert_trap (invoke "store-value") "unreachable")
-(assert_trap (invoke "storeN-address") "unreachable")
-(assert_trap (invoke "storeN-value") "unreachable")
+(assert_trap (invoke "as-store-address") "unreachable")
+(assert_trap (invoke "as-store-value") "unreachable")
+(assert_trap (invoke "as-storeN-address") "unreachable")
+(assert_trap (invoke "as-storeN-value") "unreachable")
 
-(assert_trap (invoke "unary-operand") "unreachable")
+(assert_trap (invoke "as-unary-operand") "unreachable")
 
-(assert_trap (invoke "binary-left") "unreachable")
-(assert_trap (invoke "binary-right") "unreachable")
+(assert_trap (invoke "as-binary-left") "unreachable")
+(assert_trap (invoke "as-binary-right") "unreachable")
 
-(assert_trap (invoke "test-operand") "unreachable")
+(assert_trap (invoke "as-test-operand") "unreachable")
 
-(assert_trap (invoke "compare-left") "unreachable")
-(assert_trap (invoke "compare-right") "unreachable")
+(assert_trap (invoke "as-compare-left") "unreachable")
+(assert_trap (invoke "as-compare-right") "unreachable")
 
-(assert_trap (invoke "convert-operand") "unreachable")
+(assert_trap (invoke "as-convert-operand") "unreachable")
 
-(assert_trap (invoke "grow_memory-size") "unreachable")
+(assert_trap (invoke "as-grow_memory-size") "unreachable")