[snapshot] Move builtins generation into mksnapshot

src/interpreter/setup-interpreter-internal.cc

Index: src/interpreter/setup-interpreter-internal.cc
diff --git a/src/interpreter/setup-interpreter-internal.cc b/src/interpreter/setup-interpreter-internal.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1477ee8c7b145250c99e6ac3c1a66abf73cf0888
--- /dev/null
+++ b/src/interpreter/setup-interpreter-internal.cc
@@ -0,0 +1,94 @@
+// 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/interpreter/setup-interpreter.h"
+
+#include "src/handles-inl.h"
+#include "src/interpreter/bytecodes.h"
+#include "src/interpreter/interpreter-generator.h"
+#include "src/interpreter/interpreter.h"
+#include "src/objects-inl.h"
+
+namespace v8 {
+namespace internal {
+namespace interpreter {
+
+// static
+void SetupInterpreter::InstallBytecodeHandlers(Interpreter* interpreter) {
+  DCHECK(!interpreter->IsDispatchTableInitialized());
+  HandleScope scope(interpreter->isolate_);
+  Address* dispatch_table = interpreter->dispatch_table_;
+
+  // Generate bytecode handlers for all bytecodes and scales.
+  const OperandScale kOperandScales[] = {
+#define VALUE(Name, _) OperandScale::k##Name,
+      OPERAND_SCALE_LIST(VALUE)
+#undef VALUE
+  };
+
+  for (OperandScale operand_scale : kOperandScales) {
+#define GENERATE_CODE(Name, ...)                                \
+  InstallBytecodeHandler(interpreter->isolate_, dispatch_table, \
+                         Bytecode::k##Name, operand_scale);
+    BYTECODE_LIST(GENERATE_CODE)
+#undef GENERATE_CODE
+  }
+
+  // Fill unused entries will the illegal bytecode handler.
+  size_t illegal_index = Interpreter::GetDispatchTableIndex(
+      Bytecode::kIllegal, OperandScale::kSingle);
+  for (size_t index = 0; index < Interpreter::kDispatchTableSize; ++index) {
+    if (dispatch_table[index] == nullptr) {
+      dispatch_table[index] = dispatch_table[illegal_index];
+    }
+  }
+
+  // Initialization should have been successful.
+  DCHECK(interpreter->IsDispatchTableInitialized());
+}
+
+// static
+bool SetupInterpreter::ReuseExistingHandler(Address* dispatch_table,
+                                            Bytecode bytecode,
+                                            OperandScale operand_scale) {
+  size_t index = Interpreter::GetDispatchTableIndex(bytecode, operand_scale);
+  switch (bytecode) {
+    case Bytecode::kCallProperty:
+    case Bytecode::kCallProperty0:
+    case Bytecode::kCallProperty1:
+    case Bytecode::kCallProperty2: {
+      const int offset = static_cast<int>(Bytecode::kCallProperty) -
+                         static_cast<int>(Bytecode::kCall);
+      STATIC_ASSERT(offset == static_cast<int>(Bytecode::kCallProperty0) -
+                                  static_cast<int>(Bytecode::kCall0));
+      STATIC_ASSERT(offset == static_cast<int>(Bytecode::kCallProperty1) -
+                                  static_cast<int>(Bytecode::kCall1));
+      STATIC_ASSERT(offset == static_cast<int>(Bytecode::kCallProperty2) -
+                                  static_cast<int>(Bytecode::kCall2));
+      CHECK_LT(offset, index);
+      dispatch_table[index] = dispatch_table[index - offset];
+      return true;
+      break;
+    }
+    default:
+      return false;
+  }
+}
+
+// static
+void SetupInterpreter::InstallBytecodeHandler(Isolate* isolate,
+                                              Address* dispatch_table,
+                                              Bytecode bytecode,
+                                              OperandScale operand_scale) {
+  if (!Bytecodes::BytecodeHasHandler(bytecode, operand_scale)) return;
+  if (ReuseExistingHandler(dispatch_table, bytecode, operand_scale)) return;
+
+  size_t index = Interpreter::GetDispatchTableIndex(bytecode, operand_scale);
+  Handle<Code> code = GenerateBytecodeHandler(isolate, bytecode, operand_scale);
+  dispatch_table[index] = code->entry();
+}
+
+}  // namespace interpreter
+}  // namespace internal
+}  // namespace v8