Remove exnref and br_on_exn (#3505)

This removes `exnref` type and `br_on_exn` instruction.

1 files changed, 0 insertions, 33 deletions

diff --git a/src/wasm/wasm-binary.cpp b/src/wasm/wasm-binary.cpp
index 62c8a6cb3..a61d47102 100644
--- a/src/wasm/wasm-binary.cpp
+++ b/src/wasm/wasm-binary.cpp
@@ -1045,9 +1045,6 @@ void WasmBinaryWriter::writeType(Type type) {
     case Type::externref:
       ret = BinaryConsts::EncodedType::externref;
       break;
-    case Type::exnref:
-      ret = BinaryConsts::EncodedType::exnref;
-      break;
     case Type::anyref:
       ret = BinaryConsts::EncodedType::anyref;
       break;
@@ -1080,9 +1077,6 @@ void WasmBinaryWriter::writeHeapType(HeapType type) {
       case HeapType::ext:
         ret = BinaryConsts::EncodedHeapType::extern_;
         break;
-      case HeapType::exn:
-        ret = BinaryConsts::EncodedHeapType::exn;
-        break;
       case HeapType::any:
         ret = BinaryConsts::EncodedHeapType::any;
         break;
@@ -1410,8 +1404,6 @@ Type WasmBinaryBuilder::getType(int initial) {
       return Type::funcref;
     case BinaryConsts::EncodedType::externref:
       return Type::externref;
-    case BinaryConsts::EncodedType::exnref:
-      return Type::exnref;
     case BinaryConsts::EncodedType::anyref:
       return Type::anyref;
     case BinaryConsts::EncodedType::eqref:
@@ -1457,8 +1449,6 @@ HeapType WasmBinaryBuilder::getHeapType() {
       return HeapType::func;
     case BinaryConsts::EncodedHeapType::extern_:
       return HeapType::ext;
-    case BinaryConsts::EncodedHeapType::exn:
-      return HeapType::exn;
     case BinaryConsts::EncodedHeapType::any:
       return HeapType::any;
     case BinaryConsts::EncodedHeapType::eq:
@@ -2874,9 +2864,6 @@ BinaryConsts::ASTNodes WasmBinaryBuilder::readExpression(Expression*& curr) {
     case BinaryConsts::Rethrow:
       visitRethrow((curr = allocator.alloc<Rethrow>())->cast<Rethrow>());
       break;
-    case BinaryConsts::BrOnExn:
-      visitBrOnExn((curr = allocator.alloc<BrOnExn>())->cast<BrOnExn>());
-      break;
     case BinaryConsts::MemorySize: {
       auto size = allocator.alloc<MemorySize>();
       if (wasm.memory.is64()) {
@@ -5699,26 +5686,6 @@ void WasmBinaryBuilder::visitRethrow(Rethrow* curr) {
   curr->finalize();
 }
 
-void WasmBinaryBuilder::visitBrOnExn(BrOnExn* curr) {
-  BYN_TRACE("zz node: BrOnExn\n");
-  BreakTarget target = getBreakTarget(getU32LEB());
-  curr->name = target.name;
-  auto index = getU32LEB();
-  if (index >= wasm.events.size()) {
-    throwError("bad event index");
-  }
-  curr->event = wasm.events[index]->name;
-  curr->exnref = popNonVoidExpression();
-
-  Event* event = wasm.getEventOrNull(curr->event);
-  assert(event && "br_on_exn's event must exist");
-
-  // Copy params info into BrOnExn, because it is necessary when BrOnExn is
-  // refinalized without the module.
-  curr->sent = event->sig.params;
-  curr->finalize();
-}
-
 void WasmBinaryBuilder::visitCallRef(CallRef* curr) {
   BYN_TRACE("zz node: CallRef\n");
   curr->target = popNonVoidExpression();