PATCH (not to be comitted): Support for printing instruction statistics

runtime/vm/flow_graph_compiler.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_FLOW_GRAPH_COMPILER_H_
 #define RUNTIME_VM_FLOW_GRAPH_COMPILER_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 #include "vm/code_descriptors.h"
 #include "vm/code_generator.h"
 #include "vm/intermediate_language.h"
+#include "vm/code_statistics.h"
 
 namespace dart {
 
 // Forward declarations.
 class Code;
 class DeoptInfoBuilder;
 class FlowGraph;
 class FlowGraphCompiler;
 class Function;
 template <typename T>
@@ skipping 238 matching lines @@
     bool is_marked_;
   };
 
  public:
   FlowGraphCompiler(Assembler* assembler,
                     FlowGraph* flow_graph,
                     const ParsedFunction& parsed_function,
                     bool is_optimizing,
                     const GrowableArray<const Function*>& inline_id_to_function,
                     const GrowableArray<TokenPosition>& inline_id_to_token_pos,
-                    const GrowableArray<intptr_t>& caller_inline_id);
+                    const GrowableArray<intptr_t>& caller_inline_id,
+                    CodeStatistics* stats = NULL);
 
   ~FlowGraphCompiler();
 
   static bool SupportsUnboxedDoubles();
   static bool SupportsUnboxedMints();
   static bool SupportsSinCos();
   static bool SupportsUnboxedSimd128();
   static bool SupportsHardwareDivision();
   static bool CanConvertUnboxedMintToDouble();
 
@@ skipping 23 matching lines @@
 
   Label* intrinsic_slow_path_label() { return &intrinsic_slow_path_label_; }
 
   bool ForceSlowPathForStackOverflow() const;
 
   const GrowableArray<BlockInfo*>& block_info() const { return block_info_; }
   ParallelMoveResolver* parallel_move_resolver() {
     return &parallel_move_resolver_;
   }
 
+  void StatsBegin(Instruction* instr) {
+    if (stats_ != NULL) stats_->Begin(instr);
+  }
+
+  void StatsEnd(Instruction* instr) {
+    if (stats_ != NULL) stats_->End(instr);
+  }
+
+  void SpecialStatsBegin(intptr_t tag) {
+    if (stats_ != NULL) stats_->SpecialBegin(tag);
+  }
+
+  void SpecialStatsEnd(intptr_t tag) {
+    if (stats_ != NULL) stats_->SpecialEnd(tag);
+  }
+
   // Constructor is lighweight, major initialization work should occur here.
   // This makes it easier to measure time spent in the compiler.
   void InitCompiler();
 
   void CompileGraph();
 
   void VisitBlocks();
 
   // Bail out of the flow graph compiler. Does not return to the caller.
   void Bailout(const char* reason);
@@ skipping 460 matching lines @@
   Environment* pending_deoptimization_env_;
 
   ZoneGrowableArray<const ICData*>* deopt_id_to_ic_data_;
 
   Array& edge_counters_array_;
 
   Array& inlined_code_intervals_;
   const GrowableArray<const Function*>& inline_id_to_function_;
   const GrowableArray<TokenPosition>& inline_id_to_token_pos_;
   const GrowableArray<intptr_t>& caller_inline_id_;
+  CodeStatistics* stats_;
 
   DISALLOW_COPY_AND_ASSIGN(FlowGraphCompiler);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_FLOW_GRAPH_COMPILER_H_