[turbofan] cleanup register allocator interface a little

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 <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/platform/elapsed-timer.h"
@@ skipping 241 matching lines @@
 };
 
 
 static void TraceSchedule(Schedule* schedule) {
   if (!FLAG_trace_turbo) return;
   OFStream os(stdout);
   os << "-- Schedule --------------------------------------\n" << *schedule;
 }
 
 
+static SmartArrayPointer<char> GetDebugName(CompilationInfo* info) {
+  SmartArrayPointer<char> name;
+  if (info->IsStub()) {
+    if (info->code_stub() != NULL) {
+      CodeStub::Major major_key = info->code_stub()->MajorKey();
+      const char* major_name = CodeStub::MajorName(major_key, false);
+      size_t len = strlen(major_name);
+      name.Reset(new char[len]);
+      memcpy(name.get(), major_name, len);
+    }
+  } else {
+    AllowHandleDereference allow_deref;
+    name = info->function()->debug_name()->ToCString();
+  }
+  return name;
+}
+
+
 Handle<Code> Pipeline::GenerateCode() {
   // This list must be kept in sync with DONT_TURBOFAN_NODE in ast.cc.
   if (info()->function()->dont_optimize_reason() == kTryCatchStatement ||
       info()->function()->dont_optimize_reason() == kTryFinallyStatement ||
       // TODO(turbofan): Make ES6 for-of work and remove this bailout.
       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();
   }
 
   ZonePool zone_pool(isolate());
 
   SmartPointer<PipelineStatistics> pipeline_statistics;
   if (FLAG_turbo_stats) {
     pipeline_statistics.Reset(new PipelineStatistics(info(), &zone_pool));
     pipeline_statistics->BeginPhaseKind("graph creation");
   }
 
   if (FLAG_trace_turbo) {
     OFStream os(stdout);
     os << "---------------------------------------------------\n"
-       << "Begin compiling method "
-       << info()->function()->debug_name()->ToCString().get()
+       << "Begin compiling method " << GetDebugName(info()).get()
        << " using Turbofan" << std::endl;
     TurboCfgFile tcf(isolate());
     tcf << AsC1VCompilation(info());
   }
 
   // Initialize the graph and builders.
   PipelineData data(info(), &zone_pool, pipeline_statistics.get());
 
   data.source_positions()->AddDecorator();
 
@@ skipping 156 matching lines @@
     code = GenerateCode(&linkage, &data);
     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()
+       << "Finished compiling method " << GetDebugName(info()).get()
        << " using Turbofan" << std::endl;
   }
 
   return code;
 }
 
 
 void Pipeline::ComputeSchedule(PipelineData* data) {
   PhaseScope phase_scope(data->pipeline_statistics(), "scheduling");
   Schedule* schedule =
@@ skipping 71 matching lines @@
 
   // Allocate registers.
   Frame frame;
   {
     int node_count = sequence.VirtualRegisterCount();
     if (node_count > UnallocatedOperand::kMaxVirtualRegisters) {
       info()->AbortOptimization(kNotEnoughVirtualRegistersForValues);
       return Handle<Code>::null();
     }
     ZonePool::Scope zone_scope(data->zone_pool());
-    RegisterAllocator allocator(zone_scope.zone(), &frame, info(), &sequence);
+
+    SmartArrayPointer<char> debug_name;
+#ifdef DEBUG
+    debug_name = GetDebugName(info());
+#endif
+
+    RegisterAllocator allocator(zone_scope.zone(), &frame, &sequence,
+                                debug_name.get());
     if (!allocator.Allocate(data->pipeline_statistics())) {
       info()->AbortOptimization(kNotEnoughVirtualRegistersRegalloc);
       return Handle<Code>::null();
     }
     if (FLAG_trace_turbo) {
       TurboCfgFile tcf(isolate());
       tcf << AsC1VAllocator("CodeGen", &allocator);
     }
   }
 
@@ skipping 30 matching lines @@
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8