CpuProfiler: do not calculate positions if it is not necessary (BuildCompareInstruction part).

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index e37a1cee9a48534007617df4bb11b93b01f6bd2e..6e103684c8c4b71f5f75988563a4564b8223d36a 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -4818,10 +4818,13 @@ void HOptimizedGraphBuilder::VisitSwitchStatement(SwitchStatement* stmt) {
     HControlInstruction* compare = BuildCompareInstruction(
         Token::EQ_STRICT, tag_value, label_value, tag_type, label_type,
         combined_type,
-        ScriptPositionToSourcePosition(stmt->tag()->position()),
-        ScriptPositionToSourcePosition(clause->label()->position()),
         PUSH_BEFORE_SIMULATE, clause->id());
 
+    if (FLAG_hydrogen_track_positions) {
+      compare->SetOperandPositions(
+          zone(), ScriptPositionToSourcePosition(stmt->tag()->position()),
+          ScriptPositionToSourcePosition(clause->label()->position()));
+    }
     HBasicBlock* next_test_block = graph()->CreateBasicBlock();
     HBasicBlock* body_block = graph()->CreateBasicBlock();
     body_blocks.Add(body_block, zone());
@@ -10923,19 +10926,21 @@ void HOptimizedGraphBuilder::VisitCompareOperation(CompareOperation* expr) {
                               : PUSH_BEFORE_SIMULATE;
   HControlInstruction* compare = BuildCompareInstruction(
       op, left, right, left_type, right_type, combined_type,
-      ScriptPositionToSourcePosition(expr->left()->position()),
-      ScriptPositionToSourcePosition(expr->right()->position()),
       push_behavior, expr->id());
   if (compare == NULL) return;  // Bailed out.
+  if (FLAG_hydrogen_track_positions) {
+    compare->SetOperandPositions(
+        zone(), ScriptPositionToSourcePosition(expr->left()->position()),
+        ScriptPositionToSourcePosition(expr->right()->position()));
+  }
   return ast_context()->ReturnControl(compare, expr->id());
 }
 
 
 HControlInstruction* HOptimizedGraphBuilder::BuildCompareInstruction(
     Token::Value op, HValue* left, HValue* right, Type* left_type,
-    Type* right_type, Type* combined_type, SourcePosition left_position,
-    SourcePosition right_position, PushBeforeSimulateBehavior push_sim_result,
-    BailoutId bailout_id) {
+    Type* right_type, Type* combined_type,
+    PushBeforeSimulateBehavior push_sim_result, BailoutId bailout_id) {
   // Cases handled below depend on collected type feedback. They should
   // soft deoptimize when there is no type feedback.
   if (!combined_type->IsInhabited()) {
@@ -10970,10 +10975,6 @@ HControlInstruction* HOptimizedGraphBuilder::BuildCompareInstruction(
         AddCheckMap(operand_to_check, map);
         HCompareObjectEqAndBranch* result =
             New<HCompareObjectEqAndBranch>(left, right);
-        if (FLAG_hydrogen_track_positions) {
-          result->set_operand_position(zone(), 0, left_position);
-          result->set_operand_position(zone(), 1, right_position);
-        }
         return result;
       } else {
         BuildCheckHeapObject(operand_to_check);
@@ -11036,9 +11037,6 @@ HControlInstruction* HOptimizedGraphBuilder::BuildCompareInstruction(
       HCompareNumericAndBranch* result =
           New<HCompareNumericAndBranch>(left, right, op);
       result->set_observed_input_representation(left_rep, right_rep);
-      if (FLAG_hydrogen_track_positions) {
-        result->SetOperandPositions(zone(), left_position, right_position);
-      }
       return result;
     }
   }