Remove dangerous constructor from CompilationInfoWithZone.

This removes the stub-based constructor from CompilationInfoWithZone
as this class is more than a pure convenience class and only by chance
doesn't have an effect in the destructor.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/1026513004

Cr-Commit-Position: refs/heads/master@{#27376}

src/code-stubs-hydrogen.cc

@@ -35,7 +35,7 @@ static LChunk* OptimizeGraph(HGraph* graph) {
 
 class CodeStubGraphBuilderBase : public HGraphBuilder {
  public:
-  explicit CodeStubGraphBuilderBase(CompilationInfoWithZone* info)
+  explicit CodeStubGraphBuilderBase(CompilationInfo* info)
       : HGraphBuilder(info),
         arguments_length_(NULL),
         info_(info),
@@ -107,7 +107,7 @@ class CodeStubGraphBuilderBase : public HGraphBuilder {
 
   SmartArrayPointer<HParameter*> parameters_;
   HValue* arguments_length_;
-  CompilationInfoWithZone* info_;
+  CompilationInfo* info_;
   CodeStubDescriptor descriptor_;
   HContext* context_;
 };
@@ -190,7 +190,7 @@ bool CodeStubGraphBuilderBase::BuildGraph() {
 template <class Stub>
 class CodeStubGraphBuilder: public CodeStubGraphBuilderBase {
  public:
-  explicit CodeStubGraphBuilder(CompilationInfoWithZone* info)
+  explicit CodeStubGraphBuilder(CompilationInfo* info)
       : CodeStubGraphBuilderBase(info) {}
 
  protected:
@@ -272,7 +272,8 @@ static Handle<Code> DoGenerateCode(Stub* stub) {
   if (FLAG_profile_hydrogen_code_stub_compilation) {
     timer.Start();
   }
-  CompilationInfoWithZone info(stub, isolate);
+  Zone zone;
+  CompilationInfo info(stub, isolate, &zone);
   CodeStubGraphBuilder<Stub> builder(&info);
   LChunk* chunk = OptimizeGraph(builder.CreateGraph());
   Handle<Code> code = chunk->Codegen();
@@ -1711,7 +1712,7 @@ template <>
 class CodeStubGraphBuilder<KeyedLoadGenericStub>
     : public CodeStubGraphBuilderBase {
  public:
-  explicit CodeStubGraphBuilder(CompilationInfoWithZone* info)
+  explicit CodeStubGraphBuilder(CompilationInfo* info)
       : CodeStubGraphBuilderBase(info) {}
 
  protected:

src/compiler.h

@@ -494,8 +494,6 @@ class CompilationInfoWithZone: public CompilationInfo {
  public:
   explicit CompilationInfoWithZone(Handle<Script> script);
   explicit CompilationInfoWithZone(Handle<JSFunction> closure);
-  CompilationInfoWithZone(CodeStub* stub, Isolate* isolate)
-      : CompilationInfo(stub, isolate, &zone_) {}
 
   // Virtual destructor because a CompilationInfoWithZone has to exit the
   // zone scope and get rid of dependent maps even when the destructor is

test/cctest/compiler/test-instruction.cc

@@ -27,20 +27,14 @@ typedef v8::internal::compiler::InstructionSequence TestInstrSeq;
 class InstructionTester : public HandleAndZoneScope {
  public:  // We're all friends here.
   InstructionTester()
-      : isolate(main_isolate()),
-        graph(zone()),
+      : graph(zone()),
         schedule(zone()),
-        fake_stub(main_isolate()),
-        info(&fake_stub, main_isolate()),
         common(zone()),
         machine(zone()),
         code(NULL) {}
 
-  Isolate* isolate;
   Graph graph;
   Schedule schedule;
-  FakeStubForTesting fake_stub;
-  CompilationInfoWithZone info;
   CommonOperatorBuilder common;
   MachineOperatorBuilder machine;
   TestInstrSeq* code;

test/cctest/compiler/test-linkage.cc

@@ -74,9 +74,10 @@ TEST(TestLinkageJSFunctionIncoming) {
 
 TEST(TestLinkageCodeStubIncoming) {
   Isolate* isolate = CcTest::InitIsolateOnce();
+  Zone zone;
   ToNumberStub stub(isolate);
-  CompilationInfoWithZone info(&stub, isolate);
-  CallDescriptor* descriptor = Linkage::ComputeIncoming(info.zone(), &info);
+  CompilationInfo info(&stub, isolate, &zone);
+  CallDescriptor* descriptor = Linkage::ComputeIncoming(&zone, &info);
   CHECK(descriptor);
   CHECK_EQ(1, static_cast<int>(descriptor->JSParameterCount()));
   CHECK_EQ(1, static_cast<int>(descriptor->ReturnCount()));