[async-functions] support await expressions in finally statements

src/asmjs/asm-wasm-builder.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 // Required to get M_E etc. in MSVC.
 #if defined(_WIN32)
 #define _USE_MATH_DEFINES
 #endif
@@ skipping 292 matching lines @@
       RECURSE(Visit(stmt->then_statement()));
     }
     if (stmt->HasElseStatement()) {
       current_function_builder_->Emit(kExprElse);
       RECURSE(Visit(stmt->else_statement()));
     }
     current_function_builder_->Emit(kExprEnd);
     breakable_blocks_.pop_back();
   }
 
+  void VisitInternalVariable(InternalVariable* expr) { UNREACHABLE(); }
+
   void DoBreakOrContinue(BreakableStatement* target, bool is_continue) {
     DCHECK_EQ(kFuncScope, scope_);
     for (int i = static_cast<int>(breakable_blocks_.size()) - 1; i >= 0; --i) {
       auto elem = breakable_blocks_.at(i);
       if (elem.first == target && elem.second == is_continue) {
         int block_distance = static_cast<int>(breakable_blocks_.size() - i - 1);
         current_function_builder_->Emit(kExprBr);
         current_function_builder_->EmitVarInt(block_distance);
         return;
       }
@@ skipping 1683 matching lines @@
   impl.builder_->WriteAsmJsOffsetTable(*asm_offsets_buffer);
   return {module_buffer, asm_offsets_buffer, success};
 }
 
 const char* AsmWasmBuilder::foreign_init_name = "__foreign_init__";
 const char* AsmWasmBuilder::single_function_name = "__single_function__";
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8