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// Copyright 2016 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/code-stub-assembler.h"
namespace v8 {
namespace internal {
typedef compiler::Node Node;
typedef compiler::CodeAssemblerState CodeAssemblerState;
typedef compiler::CodeAssemblerLabel CodeAssemblerLabel;
class ConstructorBuiltinsAssembler : public CodeStubAssembler {
public:
explicit ConstructorBuiltinsAssembler(CodeAssemblerState* state)
: CodeStubAssembler(state) {}
Node* EmitFastNewClosure(Node* shared_info, Node* feedback_vector, Node* slot,
Node* context);
Node* EmitFastNewFunctionContext(Node* closure, Node* slots, Node* context,
ScopeType scope_type);
static int MaximumFunctionContextSlots();
Node* EmitFastCloneRegExp(Node* closure, Node* literal_index, Node* pattern,
Node* flags, Node* context);
Node* EmitFastCloneShallowArray(Node* closure, Node* literal_index,
Node* context,
CodeAssemblerLabel* call_runtime,
AllocationSiteMode allocation_site_mode);
// Maximum number of elements in copied array (chosen so that even an array
// backed by a double backing store will fit into new-space).
static const int kMaximumClonedShallowArrayElements =
JSArray::kInitialMaxFastElementArray * kPointerSize / kDoubleSize;
void CreateFastCloneShallowArrayBuiltin(
AllocationSiteMode allocation_site_mode);
// Maximum number of properties in copied objects.
static const int kMaximumClonedShallowObjectProperties = 6;
static int FastCloneShallowObjectPropertiesCount(int literal_length);
Node* EmitFastCloneShallowObject(CodeAssemblerLabel* call_runtime,
Node* closure, Node* literals_index,
Node* properties_count);
void CreateFastCloneShallowObjectBuiltin(int properties_count);
Node* EmitFastNewObject(Node* context, Node* target, Node* new_target);
Node* EmitFastNewObject(Node* context, Node* target, Node* new_target,
CodeAssemblerLabel* call_runtime);
private:
static const int kMaximumSlots = 0x8000;
static const int kSmallMaximumSlots = 10;
Node* NonEmptyShallowClone(Node* boilerplate, Node* boilerplate_map,
Node* boilerplate_elements, Node* allocation_site,
Node* capacity, ElementsKind kind);
// FastNewFunctionContext can only allocate closures which fit in the
// new space.
STATIC_ASSERT(((kMaximumSlots + Context::MIN_CONTEXT_SLOTS) * kPointerSize +
FixedArray::kHeaderSize) < kMaxRegularHeapObjectSize);
};
} // namespace internal
} // namespace v8
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