[cleanup] Log compilation start/end for wasm

As the wasm compilation pipeline skips the start and end phase of
normal pipelines, we do not log compilation start/end for functions,
which makes reading log output more complicated than need be.

Change-Id: I1566ab7428b2dd9763c443000e946d4c6c789626
Reviewed-on: https://chromium-review.googlesource.com/c/1304540Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57093}

src/compiler/pipeline.cc

@@ -1048,6 +1048,15 @@ PipelineWasmCompilationJob::Status PipelineWasmCompilationJob::PrepareJobImpl(
 
 PipelineWasmCompilationJob::Status
 PipelineWasmCompilationJob::ExecuteJobImpl() {
+  if (data_.info()->trace_turbo_json_enabled() ||
+      data_.info()->trace_turbo_graph_enabled()) {
+    CodeTracer::Scope tracing_scope(data_.GetCodeTracer());
+    OFStream os(tracing_scope.file());
+    os << "---------------------------------------------------\n"
+       << "Begin compiling method " << data_.info()->GetDebugName().get()
+       << " using Turbofan" << std::endl;
+  }
+
   pipeline_.RunPrintAndVerify("Machine", true);
 
   PipelineData* data = &data_;
@@ -1120,6 +1129,15 @@ PipelineWasmCompilationJob::ExecuteJobImpl() {
 
   compilation_info()->SetCode(code);
 
+  if (data_.info()->trace_turbo_json_enabled() ||
+      data_.info()->trace_turbo_graph_enabled()) {
+    CodeTracer::Scope tracing_scope(data->GetCodeTracer());
+    OFStream os(tracing_scope.file());
+    os << "---------------------------------------------------\n"
+       << "Finished compiling method " << data_.info()->GetDebugName().get()
+       << " using Turbofan" << std::endl;
+  }
+
   return SUCCEEDED;
 }
 
@@ -2226,6 +2244,15 @@ MaybeHandle<Code> Pipeline::GenerateCodeForWasmStub(
 
   PipelineImpl pipeline(&data);
 
+  if (info.trace_turbo_json_enabled() ||
+      info.trace_turbo_graph_enabled()) {
+    CodeTracer::Scope tracing_scope(data.GetCodeTracer());
+    OFStream os(tracing_scope.file());
+    os << "---------------------------------------------------\n"
+       << "Begin compiling method " << info.GetDebugName().get()
+       << " using Turbofan" << std::endl;
+  }
+
   if (info.trace_turbo_graph_enabled()) {  // Simple textual RPO.
     StdoutStream{} << "-- wasm stub " << Code::Kind2String(kind) << " graph -- "
                    << std::endl