[Interpreter] Add CallRuntime support to the interpreter.

src/interpreter/bytecode-generator.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/interpreter/bytecode-generator.h"
 
 #include <stack>
 
 #include "src/compiler.h"
 #include "src/objects.h"
@@ skipping 442 matching lines @@
 
   // TODO(rmcilroy): Deal with possible direct eval here?
   // TODO(rmcilroy): Use CallIC to allow call type feedback.
   builder().Call(callee, receiver, args->length());
 }
 
 
 void BytecodeGenerator::VisitCallNew(CallNew* expr) { UNIMPLEMENTED(); }
 
 
-void BytecodeGenerator::VisitCallRuntime(CallRuntime* expr) { UNIMPLEMENTED(); }
+void BytecodeGenerator::VisitCallRuntime(CallRuntime* expr) {
+  if (expr->is_jsruntime()) {
+    UNIMPLEMENTED();
+  }
+
+  // Evaluate all arguments to the runtime call.
+  ZoneList<Expression*>* args = expr->arguments();
+  TemporaryRegisterScope temporary_register_scope(&builder_);
+  // Ensure we always have a valid first_arg register even if there are no
+  // arguments to pass.
+  Register first_arg = temporary_register_scope.NewRegister();
+  for (int i = 0; i < args->length(); ++i) {
+    Register arg =
+        (i == 0) ? first_arg : temporary_register_scope.NewRegister();
+    Visit(args->at(i));
+    DCHECK(arg.index() - i == first_arg.index());

[Michael Starzinger, 2015/09/29 08:28:34]

nit: DCHECK_EQ here?

[rmcilroy, 2015/10/01 17:02:45]

Done.

+    builder().StoreAccumulatorInRegister(arg);
+  }
+
+  // TODO(rmcilroy): support multiple return values.
+  DCHECK(expr->function()->result_size <= 1);

[oth, 2015/09/29 09:33:36]

nit: DCHECK_LE

[rmcilroy, 2015/10/01 17:02:45]

Done.

+  Runtime::FunctionId function_id = expr->function()->function_id;
+  builder().CallRuntime(function_id, first_arg, args->length());
+}
 
 
 void BytecodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
   UNIMPLEMENTED();
 }
 
 
 void BytecodeGenerator::VisitCountOperation(CountOperation* expr) {
   UNIMPLEMENTED();
 }
@@ skipping 72 matching lines @@
 }
 
 
 int BytecodeGenerator::feedback_index(FeedbackVectorICSlot slot) const {
   return info()->feedback_vector()->GetIndex(slot);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8