[maglev] Skip functions with handler tables

We were doing this for synchronous compiles, but not for asynchronous
ones.

Bug: v8:7700
Change-Id: I10173ddc34bd8750051272c0ec065e21bbd20082
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3581767
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79925}

src/maglev/maglev-compiler.cc

@@ -154,6 +154,12 @@ void MaglevCompiler::Compile() {
         new MaglevGraphLabeller());
   }
 
+  // TODO(v8:7700): Support exceptions in maglev. We currently bail if exception
+  // handler table is non-empty.
+  if (toplevel_compilation_unit_->bytecode().handler_table_size() > 0) {
+    return;
+  }
+
   MaglevGraphBuilder graph_builder(local_isolate(), toplevel_compilation_unit_);
 
   graph_builder.Build();

src/maglev/maglev.cc

@@ -16,9 +16,6 @@ MaybeHandle<CodeT> Maglev::Compile(Isolate* isolate,
   DCHECK(FLAG_maglev);
   auto info = maglev::MaglevCompilationInfo::New(isolate, function);
   maglev::MaglevCompilationUnit* const unit = info->toplevel_compilation_unit();
-  // TODO(v8:7700): Support exceptions in maglev. We currently bail if exception
-  // handler table is non-empty.
-  if (unit->bytecode().handler_table_size() > 0) return {};
   maglev::MaglevCompiler::Compile(isolate->main_thread_local_isolate(), unit);
   return maglev::MaglevCompiler::GenerateCode(unit);
 }