[console] fast console.assert(true)

src/builtins/builtins-console-gen.cc

Index: src/builtins/builtins-console-gen.cc
diff --git a/src/builtins/builtins-console-gen.cc b/src/builtins/builtins-console-gen.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f8475d1632c1b89a9fe62a9e3b9c30067d9400c0
--- /dev/null
+++ b/src/builtins/builtins-console-gen.cc
@@ -0,0 +1,38 @@
+// Copyright 2017 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/builtins/builtins-utils-gen.h"
+#include "src/builtins/builtins.h"
+#include "src/code-stub-assembler.h"
+
+namespace v8 {
+namespace internal {
+
+TF_BUILTIN(FastConsoleAssert, CodeStubAssembler) {
+  Label runtime(this);
+  Label out(this);
+
+  // TODO(ishell): use constants from Descriptor once the JSFunction linkage
+  // arguments are reordered.
+  Node* argc = Parameter(BuiltinDescriptor::kArgumentsCount);
+  Node* context = Parameter(BuiltinDescriptor::kContext);
+  Node* new_target = Parameter(BuiltinDescriptor::kNewTarget);
+  GotoIf(Word32Equal(argc, Int32Constant(0)), &runtime);
+
+  CodeStubArguments args(this, ChangeInt32ToIntPtr(argc));
+  BranchIfToBooleanIsTrue(args.AtIndex(0), &out, &runtime);
+  BIND(&out);
+  args.PopAndReturn(UndefinedConstant());
+
+  BIND(&runtime);
+  {
+    Node* target = LoadFromFrame(StandardFrameConstants::kFunctionOffset,
+                                 MachineType::TaggedPointer());
+    TailCallBuiltin(Builtins::kConsoleAssert, context, target, new_target,
+                    argc);
+  }
+}
+
+}  // namespace internal
+}  // namespace v8