[turbofan] split compilation stats off from HStatistics and track high water marks

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "src/compiler/pipeline.h"
-
 #include <sstream>
 
 #include "src/base/platform/elapsed-timer.h"
 #include "src/compiler/ast-graph-builder.h"
 #include "src/compiler/basic-block-instrumentor.h"
 #include "src/compiler/change-lowering.h"
 #include "src/compiler/code-generator.h"
 #include "src/compiler/control-reducer.h"
 #include "src/compiler/graph-replay.h"
 #include "src/compiler/graph-visualizer.h"
 #include "src/compiler/instruction.h"
 #include "src/compiler/instruction-selector.h"
 #include "src/compiler/js-context-specialization.h"
 #include "src/compiler/js-generic-lowering.h"
 #include "src/compiler/js-inlining.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/machine-operator-reducer.h"
 #include "src/compiler/phi-reducer.h"
+#include "src/compiler/pipeline.h"
+#include "src/compiler/pipeline-statistics.h"
 #include "src/compiler/register-allocator.h"
 #include "src/compiler/schedule.h"
 #include "src/compiler/scheduler.h"
 #include "src/compiler/simplified-lowering.h"
 #include "src/compiler/simplified-operator-reducer.h"
 #include "src/compiler/typer.h"
 #include "src/compiler/value-numbering-reducer.h"
 #include "src/compiler/verifier.h"
 #include "src/compiler/zone-pool.h"
-#include "src/hydrogen.h"
 #include "src/ostreams.h"
 #include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
-class PhaseStats {
- public:
-  enum PhaseKind { CREATE_GRAPH, OPTIMIZATION, CODEGEN };
-
-  PhaseStats(CompilationInfo* info, ZonePool* zone_pool, PhaseKind kind,
-             const char* name)
-      : info_(info),
-        stats_scope_(zone_pool),
-        kind_(kind),
-        name_(name),
-        size_(0) {
-    if (FLAG_turbo_stats) {
-      timer_.Start();
-      size_ = info_->zone()->allocation_size();
-    }
-  }
-
-  ~PhaseStats() {
-    if (FLAG_turbo_stats) {
-      base::TimeDelta delta = timer_.Elapsed();
-      size_t bytes = info_->zone()->allocation_size() +
-                     stats_scope_.GetMaxAllocatedBytes() - size_;
-      HStatistics* stats = info_->isolate()->GetTStatistics();
-      stats->SaveTiming(name_, delta, static_cast<int>(bytes));
-
-      switch (kind_) {
-        case CREATE_GRAPH:
-          stats->IncrementCreateGraph(delta);
-          break;
-        case OPTIMIZATION:
-          stats->IncrementOptimizeGraph(delta);
-          break;
-        case CODEGEN:
-          stats->IncrementGenerateCode(delta);
-          break;
-      }
-    }
-  }
-
- private:
-  CompilationInfo* info_;
-  ZonePool::StatsScope stats_scope_;
-  PhaseKind kind_;
-  const char* name_;
-  size_t size_;
-  base::ElapsedTimer timer_;
-};
-
-
 static inline bool VerifyGraphs() {
 #ifdef DEBUG
   return true;
 #else
   return FLAG_turbo_verify;
 #endif
 }
 
 
 void Pipeline::PrintCompilationStart() {
@@ skipping 118 matching lines @@
       info()->function()->dont_optimize_reason() == kForOfStatement ||
       // TODO(turbofan): Make super work and remove this bailout.
       info()->function()->dont_optimize_reason() == kSuperReference ||
       // TODO(turbofan): Make class literals work and remove this bailout.
       info()->function()->dont_optimize_reason() == kClassLiteral ||
       // TODO(turbofan): Make OSR work and remove this bailout.
       info()->is_osr()) {
     return Handle<Code>::null();
   }
 
-  if (FLAG_turbo_stats) isolate()->GetTStatistics()->Initialize(info_);
+  ZonePool zone_pool(isolate());
+
+  SmartPointer<PipelineStatistics> pipeline_statistics;
+  if (FLAG_turbo_stats) {
+    pipeline_statistics.Reset(new PipelineStatistics(info(), &zone_pool));
+    pipeline_statistics->BeginPhaseKind("create graph");
+  }
 
   if (FLAG_trace_turbo) {
     OFStream os(stdout);
     os << "---------------------------------------------------\n"
        << "Begin compiling method "
        << info()->function()->debug_name()->ToCString().get()
        << " using Turbofan" << std::endl;
     PrintCompilationStart();
   }
 
-  ZonePool zone_pool(isolate());
-
   // Build the graph.
   Graph graph(zone());
   SourcePositionTable source_positions(&graph);
   source_positions.AddDecorator();
   // TODO(turbofan): there is no need to type anything during initial graph
   // construction.  This is currently only needed for the node cache, which the
   // typer could sweep over later.
   Typer typer(&graph, info()->context());
   MachineOperatorBuilder machine;
   CommonOperatorBuilder common(zone());
   JSOperatorBuilder javascript(zone());
   JSGraph jsgraph(&graph, &common, &javascript, &machine);
   Node* context_node;
   {
-    PhaseStats graph_builder_stats(info(), &zone_pool, PhaseStats::CREATE_GRAPH,
-                                   "graph builder");
+    PhaseScope phase_scope(pipeline_statistics.get(), "graph builder");
     ZonePool::Scope zone_scope(&zone_pool);
     AstGraphBuilderWithPositions graph_builder(zone_scope.zone(), info(),
                                                &jsgraph, &source_positions);
     graph_builder.CreateGraph();
     context_node = graph_builder.GetFunctionContext();
   }
   {
-    PhaseStats phi_reducer_stats(info(), &zone_pool, PhaseStats::CREATE_GRAPH,
-                                 "phi reduction");
+    PhaseScope phase_scope(pipeline_statistics.get(), "phi reduction");
     PhiReducer phi_reducer;
     GraphReducer graph_reducer(&graph);
     graph_reducer.AddReducer(&phi_reducer);
     graph_reducer.ReduceGraph();
     // TODO(mstarzinger): Running reducer once ought to be enough for everyone.
     graph_reducer.ReduceGraph();
     graph_reducer.ReduceGraph();
   }
 
   VerifyAndPrintGraph(&graph, "Initial untyped", true);
 
   if (info()->is_context_specializing()) {
     SourcePositionTable::Scope pos(&source_positions,
                                    SourcePosition::Unknown());
     // Specialize the code to the context as aggressively as possible.
     JSContextSpecializer spec(info(), &jsgraph, context_node);
     spec.SpecializeToContext();
     VerifyAndPrintGraph(&graph, "Context specialized", true);
   }
 
   if (info()->is_inlining_enabled()) {
+    PhaseScope phase_scope(pipeline_statistics.get(), "inlining");
     SourcePositionTable::Scope pos(&source_positions,
                                    SourcePosition::Unknown());
     ZonePool::Scope zone_scope(&zone_pool);
     JSInliner inliner(zone_scope.zone(), info(), &jsgraph);
     inliner.Inline();
     VerifyAndPrintGraph(&graph, "Inlined", true);
   }
 
   // Print a replay of the initial graph.
   if (FLAG_print_turbo_replay) {
     GraphReplayPrinter::PrintReplay(&graph);
   }
 
   // Bailout here in case target architecture is not supported.
   if (!SupportedTarget()) return Handle<Code>::null();
 
   if (info()->is_typing_enabled()) {
     {
       // Type the graph.
-      PhaseStats typer_stats(info(), &zone_pool, PhaseStats::CREATE_GRAPH,
-                             "typer");
+      PhaseScope phase_scope(pipeline_statistics.get(), "typer");
       typer.Run();
       VerifyAndPrintGraph(&graph, "Typed");
     }
+  }
+
+  if (!pipeline_statistics.is_empty()) {
+    pipeline_statistics->BeginPhaseKind("lowering");
+  }
+
+  if (info()->is_typing_enabled()) {
     {
       // Lower JSOperators where we can determine types.
-      PhaseStats lowering_stats(info(), &zone_pool, PhaseStats::CREATE_GRAPH,
-                                "typed lowering");
+      PhaseScope phase_scope(pipeline_statistics.get(), "typed lowering");
       SourcePositionTable::Scope pos(&source_positions,
                                      SourcePosition::Unknown());
       ValueNumberingReducer vn_reducer(zone());
       JSTypedLowering lowering(&jsgraph);
       SimplifiedOperatorReducer simple_reducer(&jsgraph);
       GraphReducer graph_reducer(&graph);
       graph_reducer.AddReducer(&vn_reducer);
       graph_reducer.AddReducer(&lowering);
       graph_reducer.AddReducer(&simple_reducer);
       graph_reducer.ReduceGraph();
 
       VerifyAndPrintGraph(&graph, "Lowered typed");
     }
     {
       // Lower simplified operators and insert changes.
-      PhaseStats lowering_stats(info(), &zone_pool, PhaseStats::CREATE_GRAPH,
-                                "simplified lowering");
+      PhaseScope phase_scope(pipeline_statistics.get(), "simplified lowering");
       SourcePositionTable::Scope pos(&source_positions,
                                      SourcePosition::Unknown());
       SimplifiedLowering lowering(&jsgraph);
       lowering.LowerAllNodes();
       ValueNumberingReducer vn_reducer(zone());
       SimplifiedOperatorReducer simple_reducer(&jsgraph);
       GraphReducer graph_reducer(&graph);
       graph_reducer.AddReducer(&vn_reducer);
       graph_reducer.AddReducer(&simple_reducer);
       graph_reducer.ReduceGraph();
 
       VerifyAndPrintGraph(&graph, "Lowered simplified");
     }
     {
       // Lower changes that have been inserted before.
-      PhaseStats lowering_stats(info(), &zone_pool, PhaseStats::OPTIMIZATION,
-                                "change lowering");
+      PhaseScope phase_scope(pipeline_statistics.get(), "change lowering");
       SourcePositionTable::Scope pos(&source_positions,
                                      SourcePosition::Unknown());
       Linkage linkage(info());
       ValueNumberingReducer vn_reducer(zone());
       SimplifiedOperatorReducer simple_reducer(&jsgraph);
       ChangeLowering lowering(&jsgraph, &linkage);
       MachineOperatorReducer mach_reducer(&jsgraph);
       GraphReducer graph_reducer(&graph);
       // TODO(titzer): Figure out if we should run all reducers at once here.
       graph_reducer.AddReducer(&vn_reducer);
       graph_reducer.AddReducer(&simple_reducer);
       graph_reducer.AddReducer(&lowering);
       graph_reducer.AddReducer(&mach_reducer);
       graph_reducer.ReduceGraph();
 
       // TODO(jarin, rossberg): Remove UNTYPED once machine typing works.
       VerifyAndPrintGraph(&graph, "Lowered changes", true);
     }
 
     {
+      PhaseScope phase_scope(pipeline_statistics.get(), "control reduction");
       SourcePositionTable::Scope pos(&source_positions,
                                      SourcePosition::Unknown());
-      PhaseStats control_reducer_stats(
-          info(), &zone_pool, PhaseStats::CREATE_GRAPH, "control reduction");
       ZonePool::Scope zone_scope(&zone_pool);
       ControlReducer::ReduceGraph(zone_scope.zone(), &jsgraph, &common);
 
       VerifyAndPrintGraph(&graph, "Control reduced");
     }
   }
 
   {
     // Lower any remaining generic JSOperators.
-    PhaseStats lowering_stats(info(), &zone_pool, PhaseStats::CREATE_GRAPH,
-                              "generic lowering");
+    PhaseScope phase_scope(pipeline_statistics.get(), "generic lowering");
     SourcePositionTable::Scope pos(&source_positions,
                                    SourcePosition::Unknown());
     JSGenericLowering lowering(info(), &jsgraph);
     GraphReducer graph_reducer(&graph);
     graph_reducer.AddReducer(&lowering);
     graph_reducer.ReduceGraph();
 
     // TODO(jarin, rossberg): Remove UNTYPED once machine typing works.
     VerifyAndPrintGraph(&graph, "Lowered generic", true);
   }
 
+  if (!pipeline_statistics.is_empty()) {
+    pipeline_statistics->BeginPhaseKind("code generation");
+  }
+
   source_positions.RemoveDecorator();
 
+  Schedule* schedule;
+  {
+    PhaseScope phase_scope(pipeline_statistics.get(), "scheduling");
+    // Compute a schedule.
+    schedule = ComputeSchedule(&zone_pool, &graph);
+  }
+
   Handle<Code> code = Handle<Code>::null();
   {
-    // Compute a schedule.
-    Schedule* schedule = ComputeSchedule(&zone_pool, &graph);
     // Generate optimized code.
-    PhaseStats codegen_stats(info(), &zone_pool, PhaseStats::CODEGEN,
-                             "codegen");
     Linkage linkage(info());
-    code =
-        GenerateCode(&zone_pool, &linkage, &graph, schedule, &source_positions);
+    code = GenerateCode(pipeline_statistics.get(), &zone_pool, &linkage, &graph,
+                        schedule, &source_positions);
     info()->SetCode(code);
   }
 
   // Print optimized code.
   v8::internal::CodeGenerator::PrintCode(code, info());
 
   if (FLAG_trace_turbo) {
     OFStream os(stdout);
     os << "--------------------------------------------------\n"
        << "Finished compiling method "
        << info()->function()->debug_name()->ToCString().get()
        << " using Turbofan" << std::endl;
   }
 
   return code;
 }
 
 
 Schedule* Pipeline::ComputeSchedule(ZonePool* zone_pool, Graph* graph) {
-  PhaseStats schedule_stats(info(), zone_pool, PhaseStats::CODEGEN,
-                            "scheduling");
   Schedule* schedule = Scheduler::ComputeSchedule(zone_pool, graph);
   TraceSchedule(schedule);
   if (VerifyGraphs()) ScheduleVerifier::Run(schedule);
   return schedule;
 }
 
 
 Handle<Code> Pipeline::GenerateCodeForMachineGraph(Linkage* linkage,
                                                    Graph* graph,
                                                    Schedule* schedule) {
   ZonePool zone_pool(isolate());
   CHECK(SupportedBackend());
   if (schedule == NULL) {
     // TODO(rossberg): Should this really be untyped?
     VerifyAndPrintGraph(graph, "Machine", true);
     schedule = ComputeSchedule(&zone_pool, graph);
   }
   TraceSchedule(schedule);
 
   SourcePositionTable source_positions(graph);
-  Handle<Code> code =
-      GenerateCode(&zone_pool, linkage, graph, schedule, &source_positions);
+  Handle<Code> code = GenerateCode(NULL, &zone_pool, linkage, graph, schedule,
+                                   &source_positions);
 #if ENABLE_DISASSEMBLER
   if (!code.is_null() && FLAG_print_opt_code) {
     CodeTracer::Scope tracing_scope(isolate()->GetCodeTracer());
     OFStream os(tracing_scope.file());
     code->Disassemble("test code", os);
   }
 #endif
   return code;
 }
 
 
-Handle<Code> Pipeline::GenerateCode(ZonePool* zone_pool, Linkage* linkage,
+Handle<Code> Pipeline::GenerateCode(PipelineStatistics* pipeline_statistics,
+                                    ZonePool* zone_pool, Linkage* linkage,
                                     Graph* graph, Schedule* schedule,
                                     SourcePositionTable* source_positions) {
   DCHECK_NOT_NULL(graph);
   DCHECK_NOT_NULL(linkage);
   DCHECK_NOT_NULL(schedule);
   CHECK(SupportedBackend());
 
   BasicBlockProfiler::Data* profiler_data = NULL;
   if (FLAG_turbo_profiling) {
     profiler_data = BasicBlockInstrumentor::Instrument(info_, graph, schedule);
   }
 
   Zone* instruction_zone = schedule->zone();
   InstructionSequence sequence(instruction_zone, graph, schedule);
 
   // Select and schedule instructions covering the scheduled graph.
   {
+    PhaseScope phase_scope(pipeline_statistics, "select instructions");
     ZonePool::Scope zone_scope(zone_pool);
     InstructionSelector selector(zone_scope.zone(), linkage, &sequence,
                                  schedule, source_positions);
     selector.SelectInstructions();
   }
 
   if (FLAG_trace_turbo) {
     OFStream os(stdout);
     os << "----- Instruction sequence before register allocation -----\n"
        << sequence;
     PrintScheduleAndInstructions("CodeGen", schedule, source_positions,
                                  &sequence);
   }
 
   // Allocate registers.
   Frame frame;
   {
     int node_count = graph->NodeCount();
     if (node_count > UnallocatedOperand::kMaxVirtualRegisters) {
       linkage->info()->AbortOptimization(kNotEnoughVirtualRegistersForValues);
       return Handle<Code>::null();
     }
     ZonePool::Scope zone_scope(zone_pool);
     RegisterAllocator allocator(zone_scope.zone(), &frame, linkage->info(),
                                 &sequence);
-    if (!allocator.Allocate(zone_pool)) {
+    if (!allocator.Allocate(pipeline_statistics)) {
       linkage->info()->AbortOptimization(kNotEnoughVirtualRegistersRegalloc);
       return Handle<Code>::null();
     }
     if (FLAG_trace_turbo) {
       PrintAllocator("CodeGen", &allocator);
     }
   }
 
   if (FLAG_trace_turbo) {
     OFStream os(stdout);
     os << "----- Instruction sequence after register allocation -----\n"
        << sequence;
   }
 
   // Generate native sequence.
-  CodeGenerator generator(&frame, linkage, &sequence);
-  Handle<Code> code = generator.GenerateCode();
+  Handle<Code> code;
+  {
+    PhaseScope phase_scope(pipeline_statistics, "generate code");
+    CodeGenerator generator(&frame, linkage, &sequence);
+    code = generator.GenerateCode();
+  }
   if (profiler_data != NULL) {
 #if ENABLE_DISASSEMBLER
     std::ostringstream os;
     code->Disassemble(NULL, os);
     profiler_data->SetCode(&os);
 #endif
   }
   return code;
 }
 
 
 void Pipeline::SetUp() {
   InstructionOperand::SetUpCaches();
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8