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Unified Diff: src/ast/context-slot-cache.h

Issue 2280933002: Always deserialize scope infos for parsing (Closed)
Patch Set: updates Created 4 years, 4 months ago
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Index: src/ast/context-slot-cache.h
diff --git a/src/ast/context-slot-cache.h b/src/ast/context-slot-cache.h
deleted file mode 100644
index 8e9d1f7a8b88259df0f6d6e0d89c5544d67802eb..0000000000000000000000000000000000000000
--- a/src/ast/context-slot-cache.h
+++ /dev/null
@@ -1,113 +0,0 @@
-// 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.
-
-#ifndef V8_AST_CONTEXT_SLOT_CACHE_H_
-#define V8_AST_CONTEXT_SLOT_CACHE_H_
-
-#include "src/allocation.h"
-#include "src/ast/modules.h"
-#include "src/ast/variables.h"
-
-namespace v8 {
-namespace internal {
-
-// Cache for mapping (data, property name) into context slot index.
-// The cache contains both positive and negative results.
-// Slot index equals -1 means the property is absent.
-// Cleared at startup and prior to mark sweep collection.
-class ContextSlotCache {
- public:
- // Lookup context slot index for (data, name).
- // If absent, kNotFound is returned.
- int Lookup(Object* data, String* name, VariableMode* mode,
- InitializationFlag* init_flag,
- MaybeAssignedFlag* maybe_assigned_flag);
-
- // Update an element in the cache.
- void Update(Handle<Object> data, Handle<String> name, VariableMode mode,
- InitializationFlag init_flag,
- MaybeAssignedFlag maybe_assigned_flag, int slot_index);
-
- // Clear the cache.
- void Clear();
-
- static const int kNotFound = -2;
-
- private:
- ContextSlotCache() {
- for (int i = 0; i < kLength; ++i) {
- keys_[i].data = NULL;
- keys_[i].name = NULL;
- values_[i] = kNotFound;
- }
- }
-
- inline static int Hash(Object* data, String* name);
-
-#ifdef DEBUG
- void ValidateEntry(Handle<Object> data, Handle<String> name,
- VariableMode mode, InitializationFlag init_flag,
- MaybeAssignedFlag maybe_assigned_flag, int slot_index);
-#endif
-
- static const int kLength = 256;
- struct Key {
- Object* data;
- String* name;
- };
-
- struct Value {
- Value(VariableMode mode, InitializationFlag init_flag,
- MaybeAssignedFlag maybe_assigned_flag, int index) {
- DCHECK(ModeField::is_valid(mode));
- DCHECK(InitField::is_valid(init_flag));
- DCHECK(MaybeAssignedField::is_valid(maybe_assigned_flag));
- DCHECK(IndexField::is_valid(index));
- value_ = ModeField::encode(mode) | IndexField::encode(index) |
- InitField::encode(init_flag) |
- MaybeAssignedField::encode(maybe_assigned_flag);
- DCHECK(mode == this->mode());
- DCHECK(init_flag == this->initialization_flag());
- DCHECK(maybe_assigned_flag == this->maybe_assigned_flag());
- DCHECK(index == this->index());
- }
-
- explicit inline Value(uint32_t value) : value_(value) {}
-
- uint32_t raw() { return value_; }
-
- VariableMode mode() { return ModeField::decode(value_); }
-
- InitializationFlag initialization_flag() {
- return InitField::decode(value_);
- }
-
- MaybeAssignedFlag maybe_assigned_flag() {
- return MaybeAssignedField::decode(value_);
- }
-
- int index() { return IndexField::decode(value_); }
-
- // Bit fields in value_ (type, shift, size). Must be public so the
- // constants can be embedded in generated code.
- class ModeField : public BitField<VariableMode, 0, 4> {};
- class InitField : public BitField<InitializationFlag, 4, 1> {};
- class MaybeAssignedField : public BitField<MaybeAssignedFlag, 5, 1> {};
- class IndexField : public BitField<int, 6, 32 - 6> {};
-
- private:
- uint32_t value_;
- };
-
- Key keys_[kLength];
- uint32_t values_[kLength];
-
- friend class Isolate;
- DISALLOW_COPY_AND_ASSIGN(ContextSlotCache);
-};
-
-} // namespace internal
-} // namespace v8
-
-#endif // V8_AST_CONTEXT_SLOT_CACHE_H_
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