--trace_hydrogen cleanup

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 38676624c618eeb3fa19fb257c75d37c3191c186..5dd647f1c2b00997461291610f64eddd1f5a2785 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -6302,8 +6302,6 @@ void HTracer::Trace(const char* name, HGraph* graph, LChunk* chunk) {
     HBasicBlock* current = blocks->at(i);
     Tag block_tag(this, "block");
     PrintBlockProperty("name", current->block_id());
-    PrintIntProperty("from_bci", -1);
-    PrintIntProperty("to_bci", -1);
 
     if (!current->predecessors()->is_empty()) {
       PrintIndent();
@@ -6327,9 +6325,6 @@ void HTracer::Trace(const char* name, HGraph* graph, LChunk* chunk) {
       trace_.Add("\n");
     }
 
-    PrintEmptyProperty("xhandlers");
-    PrintEmptyProperty("flags");
-
     if (current->dominator() != NULL) {
       PrintBlockProperty("dominator", current->dominator()->block_id());
     }
@@ -6366,14 +6361,13 @@ void HTracer::Trace(const char* name, HGraph* graph, LChunk* chunk) {
       Tag HIR_tag(this, "HIR");
       HInstruction* instruction = current->first();
       while (instruction != NULL) {
-        int bci = 0;
         int uses = instruction->UseCount();
         PrintIndent();
-        trace_.Add("%d %d ", bci, uses);
+        trace_.Add("%d ", uses);
         instruction->PrintNameTo(&trace_);
         trace_.Add(" ");
         instruction->PrintTo(&trace_);
-        trace_.Add(" <|@\n");
+        trace_.Add("\n");
         instruction = instruction->next();
       }
     }
@@ -6392,7 +6386,7 @@ void HTracer::Trace(const char* name, HGraph* graph, LChunk* chunk) {
             trace_.Add("%d ",
                        LifetimePosition::FromInstructionIndex(i).Value());
             linstr->PrintTo(&trace_);
-            trace_.Add(" <|@\n");
+            trace_.Add("\n");
           }
         }
       }