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// 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.
#ifndef V8_BUILTINS_BUILTINS_ARGUMENTS_GEN_H_
#define V8_BUILTINS_BUILTINS_ARGUMENTS_GEN_H_
#include "src/codegen/code-stub-assembler.h"
namespace v8 {
namespace internal {
using Node = compiler::Node;
using CodeAssemblerState = compiler::CodeAssemblerState;
using CodeAssemblerLabel = compiler::CodeAssemblerLabel;
class ArgumentsBuiltinsAssembler : public CodeStubAssembler {
public:
explicit ArgumentsBuiltinsAssembler(CodeAssemblerState* state)
: CodeStubAssembler(state) {}
Node* EmitFastNewStrictArguments(Node* context, Node* function);
Node* EmitFastNewSloppyArguments(Node* context, Node* function);
Node* EmitFastNewRestParameter(Node* context, Node* function);
private:
// Allocates an an arguments (either rest, strict or sloppy) together with the
// FixedArray elements for the arguments and a parameter map (for sloppy
// arguments only). A tuple is returned with pointers to the arguments object,
// the elements and parameter map in the form:
// <argument object, arguments FixedArray, parameter map or nullptr>
std::tuple<Node*, Node*, Node*> AllocateArgumentsObject(
Node* map, Node* arguments, Node* mapped_arguments,
ParameterMode param_mode, int base_size);
// For Rest parameters and Strict arguments, the copying of parameters from
// the stack into the arguments object is straight-forward and shares much of
// the same underlying logic, which is encapsulated by this function. It
// allocates an arguments-like object of size |base_size| with the map |map|,
// and then copies |rest_count| arguments from the stack frame pointed to by
// |frame_ptr| starting from |first_arg|. |arg_count| == |first_arg| +
// |rest_count|.
Node* ConstructParametersObjectFromArgs(Node* map, Node* frame_ptr,
Node* arg_count, Node* first_arg,
Node* rest_count,
ParameterMode param_mode,
int base_size);
};
} // namespace internal
} // namespace v8
#endif // V8_BUILTINS_BUILTINS_ARGUMENTS_GEN_H_
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