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Side by Side Diff: src/builtins/builtins-arguments.h

Issue 2760953002: [builtins] Move more files into v8_builtins_generators source set (Closed)
Patch Set: rebased Created 3 years, 9 months ago
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1 // Copyright 2017 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "src/code-stub-assembler.h"
6
7 namespace v8 {
8 namespace internal {
9
10 typedef compiler::Node Node;
11 typedef compiler::CodeAssemblerState CodeAssemblerState;
12 typedef compiler::CodeAssemblerLabel CodeAssemblerLabel;
13
14 class ArgumentsBuiltinsAssembler : public CodeStubAssembler {
15 public:
16 explicit ArgumentsBuiltinsAssembler(CodeAssemblerState* state)
17 : CodeStubAssembler(state) {}
18
19 Node* EmitFastNewStrictArguments(Node* context, Node* function);
20 Node* EmitFastNewSloppyArguments(Node* context, Node* function);
21 Node* EmitFastNewRestParameter(Node* context, Node* function);
22
23 private:
24 // Calculates and returns the the frame pointer, argument count and formal
25 // parameter count to be used to access a function's parameters, taking
26 // argument adapter frames into account. The tuple is of the form:
27 // <frame_ptr, # parameters actually passed, formal parameter count>
28 std::tuple<Node*, Node*, Node*> GetArgumentsFrameAndCount(Node* function,
29 ParameterMode mode);
30
31 // Allocates an an arguments (either rest, strict or sloppy) together with the
32 // FixedArray elements for the arguments and a parameter map (for sloppy
33 // arguments only). A tuple is returned with pointers to the arguments object,
34 // the elements and parameter map in the form:
35 // <argument object, arguments FixedArray, parameter map or nullptr>
36 std::tuple<Node*, Node*, Node*> AllocateArgumentsObject(
37 Node* map, Node* arguments, Node* mapped_arguments,
38 ParameterMode param_mode, int base_size);
39
40 // For Rest parameters and Strict arguments, the copying of parameters from
41 // the stack into the arguments object is straight-forward and shares much of
42 // the same underlying logic, which is encapsulated by this function. It
43 // allocates an arguments-like object of size |base_size| with the map |map|,
44 // and then copies |rest_count| arguments from the stack frame pointed to by
45 // |frame_ptr| starting from |first_arg|. |arg_count| == |first_arg| +
46 // |rest_count|.
47 Node* ConstructParametersObjectFromArgs(Node* map, Node* frame_ptr,
48 Node* arg_count, Node* first_arg,
49 Node* rest_count,
50 ParameterMode param_mode,
51 int base_size);
52 };
53
54 } // namespace internal
55 } // namespace v8
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