add stub for api function calls with known number of parameters

src/hydrogen.cc

 // Copyright 2013 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/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 8758 matching lines @@
   HInstruction* call = nullptr;
   if (!is_function) {
     CallApiAccessorStub stub(isolate(), is_store, call_data_undefined);
     Handle<Code> code = stub.GetCode();
     HConstant* code_value = Add<HConstant>(code);
     ApiAccessorDescriptor descriptor(isolate());
     DCHECK(arraysize(op_vals) - 1 == descriptor.GetEnvironmentLength());
     call = New<HCallWithDescriptor>(
         code_value, argc + 1, descriptor,
         Vector<HValue*>(op_vals, descriptor.GetEnvironmentLength()));
+  } else if (argc <= CallApiFunctionWithFixedArgsStub::kMaxFixedArgs) {
+    CallApiFunctionWithFixedArgsStub stub(isolate(), argc, call_data_undefined);
+    Handle<Code> code = stub.GetCode();
+    HConstant* code_value = Add<HConstant>(code);
+    ApiFunctionWithFixedArgsDescriptor descriptor(isolate());
+    DCHECK(arraysize(op_vals) - 1 == descriptor.GetEnvironmentLength());
+    call = New<HCallWithDescriptor>(
+        code_value, argc + 1, descriptor,
+        Vector<HValue*>(op_vals, descriptor.GetEnvironmentLength()));
+    Drop(1);  // Drop function.
   } else {
     op_vals[arraysize(op_vals) - 1] = Add<HConstant>(argc);
     CallApiFunctionStub stub(isolate(), call_data_undefined);
     Handle<Code> code = stub.GetCode();
     HConstant* code_value = Add<HConstant>(code);
     ApiFunctionDescriptor descriptor(isolate());
     DCHECK(arraysize(op_vals) == descriptor.GetEnvironmentLength());
     call = New<HCallWithDescriptor>(
         code_value, argc + 1, descriptor,
         Vector<HValue*>(op_vals, descriptor.GetEnvironmentLength()));
@@ skipping 4668 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal