Split the TRACE_EVENTs from the LOG/HistogramTimers/TimerEvents functionality.

src/compiler.cc

Index: src/compiler.cc
diff --git a/src/compiler.cc b/src/compiler.cc
index 8d6f52abddf697f15c1af6246e3c4a5af5775705..b9376f2ad511cf6508f1d3e6a264548397948367 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -928,10 +928,12 @@ static bool GetOptimizedCodeNow(CompilationInfo* info) {
   Isolate* isolate = info->isolate();
   CanonicalHandleScope canonical(isolate);
   TimerEventScope<TimerEventOptimizeCode> optimize_code_timer(isolate);
+  TRACE_EVENT0("v8", "V8.OptimizeCode");
 
   if (!Compiler::ParseAndAnalyze(info->parse_info())) return false;
 
   TimerEventScope<TimerEventRecompileSynchronous> timer(isolate);
+  TRACE_EVENT0("v8", "V8.RecompileSynchronous");
 
   OptimizedCompileJob job(info);
   if (job.CreateGraph() != OptimizedCompileJob::SUCCEEDED ||
@@ -958,6 +960,7 @@ static bool GetOptimizedCodeLater(CompilationInfo* info) {
   Isolate* isolate = info->isolate();
   CanonicalHandleScope canonical(isolate);
   TimerEventScope<TimerEventOptimizeCode> optimize_code_timer(isolate);
+  TRACE_EVENT0("v8", "V8.OptimizeCode");
 
   if (!isolate->optimizing_compile_dispatcher()->IsQueueAvailable()) {
     if (FLAG_trace_concurrent_recompilation) {
@@ -976,6 +979,7 @@ static bool GetOptimizedCodeLater(CompilationInfo* info) {
   info->parse_info()->ReopenHandlesInNewHandleScope();
 
   TimerEventScope<TimerEventRecompileSynchronous> timer(info->isolate());
+  TRACE_EVENT0("v8", "V8.RecompileSynchronous");
 
   OptimizedCompileJob* job = new (info->zone()) OptimizedCompileJob(info);
   OptimizedCompileJob::Status status = job->CreateGraph();
@@ -1016,6 +1020,7 @@ MaybeHandle<Code> Compiler::GetLazyCode(Handle<JSFunction> function) {
   DCHECK(!isolate->has_pending_exception());
   DCHECK(!function->is_compiled());
   TimerEventScope<TimerEventCompileCode> compile_timer(isolate);
+  TRACE_EVENT0("v8", "V8.CompileCode");
   AggregatedHistogramTimerScope timer(isolate->counters()->compile_lazy());
   // If the debugger is active, do not compile with turbofan unless we can
   // deopt from turbofan code.
@@ -1224,6 +1229,7 @@ void Compiler::CompileForLiveEdit(Handle<Script> script) {
 static Handle<SharedFunctionInfo> CompileToplevel(CompilationInfo* info) {
   Isolate* isolate = info->isolate();
   TimerEventScope<TimerEventCompileCode> timer(isolate);
+  TRACE_EVENT0("v8", "V8.CompileCode");
   PostponeInterruptsScope postpone(isolate);
   DCHECK(!isolate->native_context().is_null());
   ParseInfo* parse_info = info->parse_info();
@@ -1283,6 +1289,7 @@ static Handle<SharedFunctionInfo> CompileToplevel(CompilationInfo* info) {
           ? info->isolate()->counters()->compile_eval()
           : info->isolate()->counters()->compile();
     HistogramTimerScope timer(rate);
+    TRACE_EVENT0("v8", info->is_eval() ? "V8.CompileEval" : "V8.Compile");
 
     // Compile the code.
     if (!CompileBaselineCode(info)) {
@@ -1453,6 +1460,7 @@ Handle<SharedFunctionInfo> Compiler::CompileScript(
         !isolate->debug()->is_loaded()) {
       // Then check cached code provided by embedder.
       HistogramTimerScope timer(isolate->counters()->compile_deserialize());
+      TRACE_EVENT0("v8", "V8.CompileDeserialize");
       Handle<SharedFunctionInfo> result;
       if (CodeSerializer::Deserialize(isolate, *cached_data, source)
               .ToHandle(&result)) {
@@ -1521,6 +1529,7 @@ Handle<SharedFunctionInfo> Compiler::CompileScript(
           compile_options == ScriptCompiler::kProduceCodeCache) {
         HistogramTimerScope histogram_timer(
             isolate->counters()->compile_serialize());
+        TRACE_EVENT0("v8", "V8.CompileSerialize");
         *cached_data = CodeSerializer::Serialize(isolate, result, source);
         if (FLAG_profile_deserialization) {
           PrintF("[Compiling and serializing took %0.3f ms]\n",
@@ -1622,6 +1631,7 @@ Handle<SharedFunctionInfo> Compiler::GetSharedFunctionInfo(
 
   // Generate code
   TimerEventScope<TimerEventCompileCode> timer(isolate);
+  TRACE_EVENT0("v8", "V8.CompileCode");
   Handle<ScopeInfo> scope_info;
   if (lazy) {
     Handle<Code> code = isolate->builtins()->CompileLazy();
@@ -1801,6 +1811,7 @@ MaybeHandle<Code> Compiler::GetConcurrentlyOptimizedCode(
 
   VMState<COMPILER> state(isolate);
   TimerEventScope<TimerEventRecompileSynchronous> timer(info->isolate());
+  TRACE_EVENT0("v8", "V8.RecompileSynchronous");
 
   Handle<SharedFunctionInfo> shared = info->shared_info();
   shared->code()->set_profiler_ticks(0);