[turbofan] reduce allocations outside of pipeline

src/compiler/code-generator.cc

 // Copyright 2013 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/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/pipeline.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 CodeGenerator::CodeGenerator(Frame* frame, Linkage* linkage,
-                             InstructionSequence* code)
+                             InstructionSequence* code, CompilationInfo* info)
     : frame_(frame),
       linkage_(linkage),
       code_(code),
+      info_(info),
       current_block_(BasicBlock::RpoNumber::Invalid()),
       current_source_position_(SourcePosition::Invalid()),
       masm_(code->zone()->isolate(), NULL, 0),
       resolver_(this),
       safepoints_(code->zone()),
       deoptimization_states_(code->zone()),
       deoptimization_literals_(code->zone()),
       translations_(code->zone()),
       last_lazy_deopt_pc_(0) {}
 
 
 Handle<Code> CodeGenerator::GenerateCode() {
-  CompilationInfo* info = linkage()->info();
+  CompilationInfo* info = this->info();
 
   // Emit a code line info recording start event.
   PositionsRecorder* recorder = masm()->positions_recorder();
   LOG_CODE_EVENT(isolate(), CodeStartLinePosInfoRecordEvent(recorder));
 
   // Place function entry hook if requested to do so.
   if (linkage()->GetIncomingDescriptor()->IsJSFunctionCall()) {
     ProfileEntryHookStub::MaybeCallEntryHook(masm());
   }
 
@@ skipping 116 matching lines @@
 void CodeGenerator::AssembleSourcePosition(SourcePositionInstruction* instr) {
   SourcePosition source_position = instr->source_position();
   if (source_position == current_source_position_) return;
   DCHECK(!source_position.IsInvalid());
   if (!source_position.IsUnknown()) {
     int code_pos = source_position.raw();
     masm()->positions_recorder()->RecordPosition(source_position.raw());
     masm()->positions_recorder()->WriteRecordedPositions();
     if (FLAG_code_comments) {
       Vector<char> buffer = Vector<char>::New(256);
-      CompilationInfo* info = linkage()->info();
+      CompilationInfo* info = this->info();
       int ln = Script::GetLineNumber(info->script(), code_pos);
       int cn = Script::GetColumnNumber(info->script(), code_pos);
       if (info->script()->name()->IsString()) {
         Handle<String> file(String::cast(info->script()->name()));
         base::OS::SNPrintF(buffer.start(), buffer.length(), "-- %s:%d:%d --",
                            file->ToCString().get(), ln, cn);
       } else {
         base::OS::SNPrintF(buffer.start(), buffer.length(),
                            "-- <unknown>:%d:%d --", ln, cn);
       }
       masm()->RecordComment(buffer.start());
     }
   }
   current_source_position_ = source_position;
 }
 
 
 void CodeGenerator::AssembleGap(GapInstruction* instr) {
   for (int i = GapInstruction::FIRST_INNER_POSITION;
        i <= GapInstruction::LAST_INNER_POSITION; i++) {
     GapInstruction::InnerPosition inner_pos =
         static_cast<GapInstruction::InnerPosition>(i);
     ParallelMove* move = instr->GetParallelMove(inner_pos);
     if (move != NULL) resolver()->Resolve(move);
   }
 }
 
 
 void CodeGenerator::PopulateDeoptimizationData(Handle<Code> code_object) {
-  CompilationInfo* info = linkage()->info();
+  CompilationInfo* info = this->info();
   int deopt_count = static_cast<int>(deoptimization_states_.size());
   if (deopt_count == 0) return;
   Handle<DeoptimizationInputData> data =
       DeoptimizationInputData::New(isolate(), deopt_count, TENURED);
 
   Handle<ByteArray> translation_array =
       translations_.CreateByteArray(isolate()->factory());
 
   data->SetTranslationByteArray(*translation_array);
   data->SetInlinedFunctionCount(Smi::FromInt(0));
@@ skipping 314 matching lines @@
 }
 
 
 void CodeGenerator::AddNopForSmiCodeInlining() { UNIMPLEMENTED(); }
 
 #endif  // !V8_TURBOFAN_BACKEND
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8