[async-functions] support await expressions in finally statements

src/ast/ast-numbering.cc

Index: src/ast/ast-numbering.cc
diff --git a/src/ast/ast-numbering.cc b/src/ast/ast-numbering.cc
index fd793f4b80dd679fc4f0c44c3523360d441b2ba1..5f6846a7f6eb79abc62d7e80dd9bcf5bcc0116fb 100644
--- a/src/ast/ast-numbering.cc
+++ b/src/ast/ast-numbering.cc
@@ -219,7 +219,6 @@ void AstNumberingVisitor::VisitYield(Yield* node) {
   yield_count_++;
   IncrementNodeCount();
   node->set_base_id(ReserveIdRange(Yield::num_ids()));
-  Visit(node->generator_object());
   Visit(node->expression());
 }
 
@@ -421,6 +420,11 @@ void AstNumberingVisitor::VisitGetIterator(GetIterator* node) {
   ReserveFeedbackSlots(node);
 }
 
+void AstNumberingVisitor::VisitInternalVariable(InternalVariable* node) {
+  IncrementNodeCount();
+  DisableFullCodegenAndCrankshaft(kNoReason);
+}
+
 void AstNumberingVisitor::VisitForInStatement(ForInStatement* node) {
   IncrementNodeCount();
   DisableSelfOptimization();
@@ -640,7 +644,28 @@ bool AstNumberingVisitor::Renumber(FunctionLiteral* node) {
     DisableFullCodegenAndCrankshaft(kClassConstructorFunction);
   }
 
+  if (scope->is_function_scope()) {
+    Variable* function_var = scope->function_var();
+    if (function_var != nullptr && !function_var->IsUnallocated()) {
+      // Initialization of local function-named variable is no longer part of
+      // the AST, and this initialization is not handled in full-codegen or
+      // crankshaft.

[caitp, 2017/01/30 04:20:29]

I'm guessing there isn't a whole lot of cases where the function-named variable
is actually used in benchmarks. If I'm wrong, it wouldn't be too hard to
implement the function-name assignment to the legacy pipeline

+      DisableFullCodegenAndCrankshaft(kNoReason);
+    }
+  }
+
+  if (IsGeneratorFunction(node->kind()) || scope->is_module_scope()) {
+    // Generator functions and Modules have an initial yield which is not
+    // included in the AST.
+    DCHECK_EQ(0, yield_count_);
+    yield_count_ = 1;
+  }
+
   VisitDeclarations(scope->declarations());
+  if (node->parameter_init_block() != nullptr) {
+    DisableFullCodegenAndCrankshaft(kNonSimpleParameters);
+    VisitBlock(node->parameter_init_block());
+  }
   VisitStatements(node->body());
 
   node->set_ast_properties(&properties_);