Simplify TurboFan's c1visualizer file handling.

Still having GetTurboCfgFileName in Isolate is ugly, but if we decide that we
don't want to truncate the output file (which would be consistent with
--trace-hydrogen), this could be moved to TurboCfgFile where it actually
belongs.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/666223003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24819 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler/pipeline.cc

@@ -4,6 +4,7 @@
 
 #include "src/compiler/pipeline.h"
 
+#include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/platform/elapsed-timer.h"
@@ -97,19 +98,10 @@ static inline bool VerifyGraphs() {
 }
 
 
-void Pipeline::PrintCompilationStart() {
-  std::ofstream turbo_cfg_stream;
-  OpenTurboCfgFile(&turbo_cfg_stream);
-  turbo_cfg_stream << AsC1VCompilation(info());
-}
-
-
-void Pipeline::OpenTurboCfgFile(std::ofstream* stream) {
-  char buffer[512];
-  Vector<char> filename(buffer, sizeof(buffer));
-  isolate()->GetTurboCfgFileName(filename);
-  stream->open(filename.start(), std::fstream::out | std::fstream::app);
-}
+struct TurboCfgFile : public std::ofstream {
+  explicit TurboCfgFile(Isolate* isolate)
+      : std::ofstream(isolate->GetTurboCfgFileName(), std::ios_base::app) {}
+};
 
 
 void Pipeline::VerifyAndPrintGraph(
@@ -158,24 +150,6 @@ void Pipeline::VerifyAndPrintGraph(
 }
 
 
-void Pipeline::PrintScheduleAndInstructions(
-    const char* phase, const Schedule* schedule,
-    const SourcePositionTable* positions,
-    const InstructionSequence* instructions) {
-  std::ofstream turbo_cfg_stream;
-  OpenTurboCfgFile(&turbo_cfg_stream);
-  turbo_cfg_stream << AsC1V(phase, schedule, positions, instructions);
-}
-
-
-void Pipeline::PrintAllocator(const char* phase,
-                              const RegisterAllocator* allocator) {
-  std::ofstream turbo_cfg_stream;
-  OpenTurboCfgFile(&turbo_cfg_stream);
-  turbo_cfg_stream << AsC1VAllocator(phase, allocator);
-}
-
-
 class AstGraphBuilderWithPositions : public AstGraphBuilder {
  public:
   explicit AstGraphBuilderWithPositions(Zone* local_zone, CompilationInfo* info,
@@ -234,7 +208,7 @@ Handle<Code> Pipeline::GenerateCode() {
        << "Begin compiling method "
        << info()->function()->debug_name()->ToCString().get()
        << " using Turbofan" << std::endl;
-    PrintCompilationStart();
+    TurboCfgFile(isolate()) << AsC1VCompilation(info());
   }
 
   ZonePool zone_pool(isolate());
@@ -487,8 +461,8 @@ Handle<Code> Pipeline::GenerateCode(ZonePool* zone_pool, Linkage* linkage,
     OFStream os(stdout);
     os << "----- Instruction sequence before register allocation -----\n"
        << sequence;
-    PrintScheduleAndInstructions("CodeGen", schedule, source_positions,
-                                 &sequence);
+    TurboCfgFile(isolate())
+        << AsC1V("CodeGen", schedule, source_positions, &sequence);
   }
 
   // Allocate registers.
@@ -507,7 +481,7 @@ Handle<Code> Pipeline::GenerateCode(ZonePool* zone_pool, Linkage* linkage,
       return Handle<Code>::null();
     }
     if (FLAG_trace_turbo) {
-      PrintAllocator("CodeGen", &allocator);
+      TurboCfgFile(isolate()) << AsC1VAllocator("CodeGen", &allocator);
     }
   }
 

src/compiler/pipeline.h

@@ -5,8 +5,6 @@
 #ifndef V8_COMPILER_PIPELINE_H_
 #define V8_COMPILER_PIPELINE_H_
 
-#include <fstream>  // NOLINT(readability/streams)
-
 #include "src/v8.h"
 
 #include "src/compiler.h"
@@ -53,12 +51,6 @@ class Pipeline {
   Zone* zone() { return info_->zone(); }
 
   Schedule* ComputeSchedule(ZonePool* zone_pool, Graph* graph);
-  void OpenTurboCfgFile(std::ofstream* stream);
-  void PrintCompilationStart();
-  void PrintScheduleAndInstructions(const char* phase, const Schedule* schedule,
-                                    const SourcePositionTable* positions,
-                                    const InstructionSequence* instructions);
-  void PrintAllocator(const char* phase, const RegisterAllocator* allocator);
   void VerifyAndPrintGraph(Graph* graph, const char* phase,
                            bool untyped = false);
   Handle<Code> GenerateCode(ZonePool* zone_pool, Linkage* linkage, Graph* graph,

src/isolate.cc

@@ -1951,12 +1951,8 @@ bool Isolate::Init(Deserializer* des) {
   if (!create_heap_objects) Assembler::QuietNaN(heap_.nan_value());
 
   if (FLAG_trace_turbo) {
-    // Erase the file.
-    char buffer[512];
-    Vector<char> filename(buffer, sizeof(buffer));
-    GetTurboCfgFileName(filename);
-    std::ofstream turbo_cfg_stream(filename.start(),
-                                   std::fstream::out | std::fstream::trunc);
+    // Create an empty file.
+    std::ofstream(GetTurboCfgFileName(), std::ios_base::trunc);
   }
 
   // If we are deserializing, log non-function code objects and compiled
@@ -2372,13 +2368,11 @@ BasicBlockProfiler* Isolate::GetOrCreateBasicBlockProfiler() {
 }
 
 
-void Isolate::GetTurboCfgFileName(Vector<char> filename) {
-  if (FLAG_trace_turbo_cfg_file == NULL) {
-    SNPrintF(filename, "turbo-%d-%d.cfg", base::OS::GetCurrentProcessId(),
-             id());
-  } else {
-    StrNCpy(filename, FLAG_trace_turbo_cfg_file, filename.length());
-  }
+std::string Isolate::GetTurboCfgFileName() {
+  return FLAG_trace_turbo_cfg_file == NULL
+             ? "turbo-" + std::to_string(base::OS::GetCurrentProcessId()) +
+                   "-" + std::to_string(id()) + ".cfg"
+             : FLAG_trace_turbo_cfg_file;
 }
 
 

src/isolate.h

@@ -1098,7 +1098,7 @@ class Isolate {
 
   static Isolate* NewForTesting() { return new Isolate(false); }
 
-  void GetTurboCfgFileName(Vector<char> buffer);
+  std::string GetTurboCfgFileName();
 
  private:
   explicit Isolate(bool enable_serializer);