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Unified Diff: src/scopeinfo.h

Issue 1481613002: Create ast/ and parsing/ subdirectories and move appropriate files (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Rebase Created 5 years, 1 month ago
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Index: src/scopeinfo.h
diff --git a/src/scopeinfo.h b/src/scopeinfo.h
deleted file mode 100644
index 2afc667c30e7023aac9fa7254af59817a42e1c14..0000000000000000000000000000000000000000
--- a/src/scopeinfo.h
+++ /dev/null
@@ -1,175 +0,0 @@
-// Copyright 2011 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_SCOPEINFO_H_
-#define V8_SCOPEINFO_H_
-
-#include "src/allocation.h"
-#include "src/modules.h"
-#include "src/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);
-};
-
-
-
-
-//---------------------------------------------------------------------------
-// Auxiliary class used for the description of module instances.
-// Used by Runtime_DeclareModules.
-
-class ModuleInfo: public FixedArray {
- public:
- static ModuleInfo* cast(Object* description) {
- return static_cast<ModuleInfo*>(FixedArray::cast(description));
- }
-
- static Handle<ModuleInfo> Create(Isolate* isolate,
- ModuleDescriptor* descriptor, Scope* scope);
-
- // Index of module's context in host context.
- int host_index() { return Smi::cast(get(HOST_OFFSET))->value(); }
-
- // Name, mode, and index of the i-th export, respectively.
- // For value exports, the index is the slot of the value in the module
- // context, for exported modules it is the slot index of the
- // referred module's context in the host context.
- // TODO(rossberg): This format cannot yet handle exports of modules declared
- // in earlier scripts.
- String* name(int i) { return String::cast(get(name_offset(i))); }
- VariableMode mode(int i) {
- return static_cast<VariableMode>(Smi::cast(get(mode_offset(i)))->value());
- }
- int index(int i) { return Smi::cast(get(index_offset(i)))->value(); }
-
- int length() { return (FixedArray::length() - HEADER_SIZE) / ITEM_SIZE; }
-
- private:
- // The internal format is: Index, (Name, VariableMode, Index)*
- enum {
- HOST_OFFSET,
- NAME_OFFSET,
- MODE_OFFSET,
- INDEX_OFFSET,
- HEADER_SIZE = NAME_OFFSET,
- ITEM_SIZE = INDEX_OFFSET - NAME_OFFSET + 1
- };
- inline int name_offset(int i) { return NAME_OFFSET + i * ITEM_SIZE; }
- inline int mode_offset(int i) { return MODE_OFFSET + i * ITEM_SIZE; }
- inline int index_offset(int i) { return INDEX_OFFSET + i * ITEM_SIZE; }
-
- static Handle<ModuleInfo> Allocate(Isolate* isolate, int length) {
- return Handle<ModuleInfo>::cast(
- isolate->factory()->NewFixedArray(HEADER_SIZE + ITEM_SIZE * length));
- }
- void set_host_index(int index) { set(HOST_OFFSET, Smi::FromInt(index)); }
- void set_name(int i, String* name) { set(name_offset(i), name); }
- void set_mode(int i, VariableMode mode) {
- set(mode_offset(i), Smi::FromInt(mode));
- }
- void set_index(int i, int index) {
- set(index_offset(i), Smi::FromInt(index));
- }
-};
-
-
-} // namespace internal
-} // namespace v8
-
-#endif // V8_SCOPEINFO_H_
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