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// Copyright 2018 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_COMPILER_ALLOCATION_BUILDER_INL_H_
#define V8_COMPILER_ALLOCATION_BUILDER_INL_H_
#include "src/compiler/access-builder.h"
#include "src/compiler/allocation-builder.h"
#include "src/heap/heap-inl.h"
#include "src/objects/arguments-inl.h"
namespace v8 {
namespace internal {
namespace compiler {
void AllocationBuilder::Allocate(int size, AllocationType allocation,
Type type) {
CHECK_GT(size, 0);
DCHECK_LE(size, isolate()->heap()->MaxRegularHeapObjectSize(allocation));
effect_ = graph()->NewNode(
common()->BeginRegion(RegionObservability::kNotObservable), effect_);
allocation_ = graph()->NewNode(simplified()->Allocate(type, allocation),
jsgraph()->Constant(size), effect_, control_);
effect_ = allocation_;
}
void AllocationBuilder::AllocateContext(int variadic_part_length, MapRef map) {
DCHECK(base::IsInRange(map.instance_type(), FIRST_CONTEXT_TYPE,
LAST_CONTEXT_TYPE));
DCHECK_NE(NATIVE_CONTEXT_TYPE, map.instance_type());
int size = Context::SizeFor(variadic_part_length);
Allocate(size, AllocationType::kYoung, Type::OtherInternal());
Store(AccessBuilder::ForMap(), map);
static_assert(static_cast<int>(Context::kLengthOffset) ==
static_cast<int>(FixedArray::kLengthOffset));
Store(AccessBuilder::ForFixedArrayLength(),
jsgraph()->Constant(variadic_part_length));
}
bool AllocationBuilder::CanAllocateArray(int length, MapRef map,
AllocationType allocation) {
DCHECK(map.instance_type() == FIXED_ARRAY_TYPE ||
map.instance_type() == FIXED_DOUBLE_ARRAY_TYPE);
int const size = (map.instance_type() == FIXED_ARRAY_TYPE)
? FixedArray::SizeFor(length)
: FixedDoubleArray::SizeFor(length);
return size <= isolate()->heap()->MaxRegularHeapObjectSize(allocation);
}
// Compound allocation of a FixedArray.
void AllocationBuilder::AllocateArray(int length, MapRef map,
AllocationType allocation) {
DCHECK(CanAllocateArray(length, map, allocation));
int size = (map.instance_type() == FIXED_ARRAY_TYPE)
? FixedArray::SizeFor(length)
: FixedDoubleArray::SizeFor(length);
Allocate(size, allocation, Type::OtherInternal());
Store(AccessBuilder::ForMap(), map);
Store(AccessBuilder::ForFixedArrayLength(), jsgraph()->Constant(length));
}
bool AllocationBuilder::CanAllocateSloppyArgumentElements(
int length, MapRef map, AllocationType allocation) {
int const size = SloppyArgumentsElements::SizeFor(length);
return size <= isolate()->heap()->MaxRegularHeapObjectSize(allocation);
}
void AllocationBuilder::AllocateSloppyArgumentElements(
int length, MapRef map, AllocationType allocation) {
DCHECK(CanAllocateSloppyArgumentElements(length, map, allocation));
int size = SloppyArgumentsElements::SizeFor(length);
Allocate(size, allocation, Type::OtherInternal());
Store(AccessBuilder::ForMap(), map);
Store(AccessBuilder::ForFixedArrayLength(), jsgraph()->Constant(length));
}
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_ALLOCATION_BUILDER_INL_H_
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