Simplify TurboFan's c1visualizer file handling.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 438f10459524b33113a439c942e0434097f1fdc2..f050c9b4c0825b163eabf07b7a40adbdac399b4d 100644
--- a/src/compiler/pipeline.cc
+++ b/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);
     }
   }