[compiler] Move tracing from backends to compiler.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1872833002

Cr-Commit-Position: refs/heads/master@{#35384}

src/compiler.cc

@@ -354,6 +354,14 @@ OptimizedCompileJob::Status OptimizedCompileJob::CreateGraph() {
   DCHECK(info()->shared_info()->has_deoptimization_support());
   DCHECK(!info()->is_first_compile());
 
+  if (FLAG_trace_opt) {
+    OFStream os(stdout);
+    os << "[compiling method " << Brief(*info()->closure()) << " using "
+       << compiler_name_;
+    if (info()->is_osr()) os << " OSR";
+    os << "]" << std::endl;
+  }
+
   // Delegate to the underlying implementation.
   DCHECK_EQ(SUCCEEDED, last_status());
   ScopedTimer t(&time_taken_to_create_graph_);

src/compiler.h

@@ -581,8 +581,8 @@ class CompilationInfo {
 // be checked using {last_status()} as well.
 class OptimizedCompileJob: public ZoneObject {
  public:
-  explicit OptimizedCompileJob(CompilationInfo* info)
-      : info_(info), last_status_(SUCCEEDED) {}
+  explicit OptimizedCompileJob(CompilationInfo* info, const char* compiler_name)
+      : info_(info), compiler_name_(compiler_name), last_status_(SUCCEEDED) {}
   virtual ~OptimizedCompileJob() {}
 
   enum Status {
@@ -622,6 +622,7 @@ class OptimizedCompileJob: public ZoneObject {
   base::TimeDelta time_taken_to_create_graph_;
   base::TimeDelta time_taken_to_optimize_;
   base::TimeDelta time_taken_to_codegen_;
+  const char* compiler_name_;
   Status last_status_;
 
   MUST_USE_RESULT Status SetLastStatus(Status status) {

src/compiler/pipeline.cc

@@ -480,7 +480,7 @@ class PipelineRunScope {
 class PipelineCompilationJob : public OptimizedCompileJob {
  public:
   explicit PipelineCompilationJob(CompilationInfo* info)
-      : OptimizedCompileJob(info) {}
+      : OptimizedCompileJob(info, "TurboFan") {}
 
  protected:
   virtual Status CreateGraphImpl();
@@ -489,14 +489,6 @@ class PipelineCompilationJob : public OptimizedCompileJob {
 };
 
 PipelineCompilationJob::Status PipelineCompilationJob::CreateGraphImpl() {
-  if (FLAG_trace_opt) {
-    OFStream os(stdout);
-    os << "[compiling method " << Brief(*info()->closure())
-       << " using TurboFan";
-    if (info()->is_osr()) os << " OSR";
-    os << "]" << std::endl;
-  }
-
   if (info()->shared_info()->asm_function()) {
     if (info()->osr_frame()) info()->MarkAsFrameSpecializing();
     info()->MarkAsFunctionContextSpecializing();

src/crankshaft/hydrogen.cc

@@ -132,14 +132,6 @@ HCompilationJob::Status HCompilationJob::CreateGraphImpl() {
     return AbortOptimization(kTooManyParametersLocals);
   }
 
-  if (FLAG_trace_opt) {
-    OFStream os(stdout);
-    os << "[compiling method " << Brief(*info()->closure())
-       << " using Crankshaft";
-    if (info()->is_osr()) os << " OSR";
-    os << "]" << std::endl;
-  }
-
   if (FLAG_trace_hydrogen) {
     isolate()->GetHTracer()->TraceCompilation(info());
   }

src/crankshaft/hydrogen.h

@@ -33,7 +33,9 @@ class LiveRange;
 class HCompilationJob final : public OptimizedCompileJob {
  public:
   explicit HCompilationJob(CompilationInfo* info)
-      : OptimizedCompileJob(info), graph_(nullptr), chunk_(nullptr) {}
+      : OptimizedCompileJob(info, "Crankshaft"),
+        graph_(nullptr),
+        chunk_(nullptr) {}
 
  protected:
   virtual Status CreateGraphImpl();