Uniform and precise source positions for inlining

src/crankshaft/hydrogen.h

 // Copyright 2012 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_CRANKSHAFT_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
 #include "src/ast/ast-type-bounds.h"
@@ skipping 300 matching lines @@
 
  private:
   void AddBlock(HBasicBlock* block);
 
   ZoneList<HBasicBlock*> back_edges_;
   HBasicBlock* loop_header_;
   ZoneList<HBasicBlock*> blocks_;
   HStackCheck* stack_check_;
 };
 
-struct HInlinedFunctionInfo {
-  explicit HInlinedFunctionInfo(int start_position)
-      : start_position(start_position) {}
-  int start_position;
-};
-
 class HGraph final : public ZoneObject {
  public:
   explicit HGraph(CompilationInfo* info, CallInterfaceDescriptor descriptor);
 
   Isolate* isolate() const { return isolate_; }
   Zone* zone() const { return zone_; }
   CompilationInfo* info() const { return info_; }
   CallInterfaceDescriptor descriptor() const { return descriptor_; }
 
   const ZoneList<HBasicBlock*>* blocks() const { return &blocks_; }
@@ skipping 131 matching lines @@
   void IncrementInNoSideEffectsScope() { no_side_effects_scope_count_++; }
   void DecrementInNoSideEffectsScope() { no_side_effects_scope_count_--; }
   bool IsInsideNoSideEffectsScope() { return no_side_effects_scope_count_ > 0; }
 
   // If we are tracking source positions then this function assigns a unique
   // identifier to each inlining and dumps function source if it was inlined
   // for the first time during the current optimization.
   int TraceInlinedFunction(Handle<SharedFunctionInfo> shared,
                            SourcePosition position);
 
-  // Converts given SourcePosition to the absolute offset from the start of
-  // the corresponding script.
-  int SourcePositionToScriptPosition(SourcePosition position);
-
-  ZoneVector<HInlinedFunctionInfo>& inlined_function_infos() {
-    return inlined_function_infos_;
-  }
-
  private:
   HConstant* ReinsertConstantIfNecessary(HConstant* constant);
   HConstant* GetConstant(SetOncePointer<HConstant>* pointer,
                          int32_t integer_value);
 
   template<class Phase>
   void Run() {
     Phase phase(this);
     phase.Run();
   }
@@ skipping 25 matching lines @@
 
   bool allow_code_motion_;
   bool use_optimistic_licm_;
   bool depends_on_empty_array_proto_elements_;
   bool depends_on_string_length_overflow_;
   int type_change_checksum_;
   int maximum_environment_size_;
   int no_side_effects_scope_count_;
   bool disallow_adding_new_values_;
 
-  ZoneVector<HInlinedFunctionInfo> inlined_function_infos_;
-
   DISALLOW_COPY_AND_ASSIGN(HGraph);
 };
 
 
 Zone* HBasicBlock::zone() const { return graph_->zone(); }
 
 
 // Type of stack frame an environment might refer to.
 enum FrameType {
   JS_FUNCTION,
@@ skipping 523 matching lines @@
  public:
   explicit HGraphBuilder(CompilationInfo* info,
                          CallInterfaceDescriptor descriptor,
                          bool track_positions)
       : info_(info),
         descriptor_(descriptor),
         graph_(NULL),
         current_block_(NULL),
         scope_(info->scope()),
         position_(SourcePosition::Unknown()),
-        start_position_(0),
         track_positions_(track_positions) {}
   virtual ~HGraphBuilder() {}
 
   Scope* scope() const { return scope_; }
   void set_scope(Scope* scope) { scope_ = scope; }
 
   HBasicBlock* current_block() const { return current_block_; }
   void set_current_block(HBasicBlock* block) { current_block_ = block; }
   HEnvironment* environment() const {
     return current_block()->last_environment();
@@ skipping 750 matching lines @@
 
   HInstruction* BuildGetArrayFunction();
   HValue* BuildArrayBufferViewFieldAccessor(HValue* object,
                                             HValue* checked_object,
                                             FieldIndex index);
 
 
  protected:
   void SetSourcePosition(int position) {
     if (position != kNoSourcePosition) {
-      position_.set_position(position - start_position_);
+      position_.SetScriptOffset(position);
     }
     // Otherwise position remains unknown.
   }
 
-  void EnterInlinedSource(int start_position, int id) {
+  void EnterInlinedSource(int inlining_id) {
     if (is_tracking_positions()) {
-      start_position_ = start_position;
-      position_.set_inlining_id(id);
+      position_.SetInliningId(inlining_id);
     }
   }
 
   // Convert the given absolute offset from the start of the script to
   // the SourcePosition assuming that this position corresponds to the
-  // same function as current position_.
+  // same function as position_.
   SourcePosition ScriptPositionToSourcePosition(int position) {
     if (position == kNoSourcePosition) {
       return SourcePosition::Unknown();
     }
-    SourcePosition pos = position_;
-    pos.set_position(position - start_position_);
-    return pos;
+    return SourcePosition(position, position_.InliningId());
   }
 
   SourcePosition source_position() { return position_; }
   void set_source_position(SourcePosition position) { position_ = position; }
 
   bool is_tracking_positions() { return track_positions_; }
 
-  int TraceInlinedFunction(Handle<SharedFunctionInfo> shared,
-                           SourcePosition position);
+  void TraceInlinedFunction(Handle<SharedFunctionInfo> shared,
+                            SourcePosition position, int inlining_id);
 
   HValue* BuildAllocateEmptyArrayBuffer(HValue* byte_length);
   template <typename ViewClass>
   void BuildArrayBufferViewInitialization(HValue* obj,
                                           HValue* buffer,
                                           HValue* byte_offset,
                                           HValue* byte_length);
 
  private:
   HGraphBuilder();
 
   template <class I>
   I* AddInstructionTyped(I* instr) {
     return I::cast(AddInstruction(instr));
   }
 
   CompilationInfo* info_;
   CallInterfaceDescriptor descriptor_;
   HGraph* graph_;
   HBasicBlock* current_block_;
   Scope* scope_;
   SourcePosition position_;
-  int start_position_;
   bool track_positions_;
 };
 
 template <>
 inline HDeoptimize* HGraphBuilder::Add<HDeoptimize>(
     DeoptimizeReason reason, Deoptimizer::BailoutType type) {
   if (type == Deoptimizer::SOFT) {
     isolate()->counters()->soft_deopts_requested()->Increment();
     if (FLAG_always_opt) return NULL;
   }
@@ skipping 1097 matching lines @@
   }
 
  private:
   HOptimizedGraphBuilder* builder_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_