Uniform and precise source positions for inlining

src/compiler/source-position.cc

-// Copyright 2014 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/compiler/source-position.h"
-#include "src/compiler/graph.h"
-#include "src/compiler/node-aux-data.h"
-
-namespace v8 {
-namespace internal {
-namespace compiler {
-
-class SourcePositionTable::Decorator final : public GraphDecorator {
- public:
-  explicit Decorator(SourcePositionTable* source_positions)
-      : source_positions_(source_positions) {}
-
-  void Decorate(Node* node) final {
-    source_positions_->SetSourcePosition(node,
-                                         source_positions_->current_position_);
-  }
-
- private:
-  SourcePositionTable* source_positions_;
-};
-
-
-SourcePositionTable::SourcePositionTable(Graph* graph)
-    : graph_(graph),
-      decorator_(nullptr),
-      current_position_(SourcePosition::Unknown()),
-      table_(graph->zone()) {}
-
-
-void SourcePositionTable::AddDecorator() {
-  DCHECK_NULL(decorator_);
-  decorator_ = new (graph_->zone()) Decorator(this);
-  graph_->AddDecorator(decorator_);
-}
-
-
-void SourcePositionTable::RemoveDecorator() {
-  DCHECK_NOT_NULL(decorator_);
-  graph_->RemoveDecorator(decorator_);
-  decorator_ = nullptr;
-}
-
-
-SourcePosition SourcePositionTable::GetSourcePosition(Node* node) const {
-  return table_.Get(node);
-}
-
-void SourcePositionTable::SetSourcePosition(Node* node,
-                                            SourcePosition position) {
-  table_.Set(node, position);
-}
-
-void SourcePositionTable::Print(std::ostream& os) const {
-  os << "{";
-  bool needs_comma = false;
-  for (auto i : table_) {
-    SourcePosition pos = i.second;
-    if (pos.IsKnown()) {
-      if (needs_comma) {
-        os << ",";
-      }
-      os << "\"" << i.first << "\""
-         << ":" << pos.raw();
-      needs_comma = true;
-    }
-  }
-  os << "}";
-}
-
-}  // namespace compiler
-}  // namespace internal
-}  // namespace v8