Deprecate ability to generate stubs via Compiler class.

This removes the ability to generate stub code via the full-fledged
compiler pipeline that parses and analyzes JavaScript source code.
Generation of stub code has been moved to a lower-level entry point.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1520373002

Cr-Commit-Position: refs/heads/master@{#32847}

src/compiler.cc

@@ -178,7 +178,6 @@ CompilationInfo::CompilationInfo(ParseInfo* parse_info, CodeStub* code_stub,
       parameter_count_(0),
       optimization_id_(-1),
       osr_expr_stack_height_(0),
-      function_type_(nullptr),
       debug_name_(debug_name) {
   // Parameter count is number of stack parameters.
   if (code_stub_ != NULL) {
@@ -205,14 +204,6 @@ CompilationInfo::~CompilationInfo() {
 }
 
 
-void CompilationInfo::SetStub(CodeStub* code_stub) {
-  SetMode(STUB);
-  code_stub_ = code_stub;
-  debug_name_ = CodeStub::MajorName(code_stub->MajorKey());
-  set_output_code_kind(code_stub->GetCodeKind());
-}
-
-
 int CompilationInfo::num_parameters() const {
   return has_scope() ? scope()->num_parameters() : parameter_count_;
 }
@@ -998,23 +989,6 @@ MaybeHandle<Code> Compiler::GetLazyCode(Handle<JSFunction> function) {
 }
 
 
-MaybeHandle<Code> Compiler::GetStubCode(Handle<JSFunction> function,
-                                        CodeStub* stub) {
-  // Build a "hybrid" CompilationInfo for a JSFunction/CodeStub pair.
-  Zone zone;
-  ParseInfo parse_info(&zone, function);
-  CompilationInfo info(&parse_info);
-  info.SetFunctionType(stub->GetCallInterfaceDescriptor().GetFunctionType());
-  info.MarkAsFunctionContextSpecializing();
-  info.MarkAsDeoptimizationEnabled();
-  info.SetStub(stub);
-
-  // Run a "mini pipeline", extracted from compiler.cc.
-  if (!ParseAndAnalyze(&parse_info)) return MaybeHandle<Code>();
-  return compiler::Pipeline(&info).GenerateCode();
-}
-
-
 bool Compiler::Compile(Handle<JSFunction> function, ClearExceptionFlag flag) {
   if (function->is_compiled()) return true;
   MaybeHandle<Code> maybe_code = Compiler::GetLazyCode(function);

src/compiler.h

@@ -314,13 +314,6 @@ class CompilationInfo {
     set_output_code_kind(Code::OPTIMIZED_FUNCTION);
   }
 
-  void SetFunctionType(Type::FunctionType* function_type) {
-    function_type_ = function_type;
-  }
-  Type::FunctionType* function_type() const { return function_type_; }
-
-  void SetStub(CodeStub* code_stub);
-
   // Deoptimization support.
   bool HasDeoptimizationSupport() const {
     return GetFlag(kDeoptimizationSupport);
@@ -525,8 +518,6 @@ class CompilationInfo {
   // The current OSR frame for specialization or {nullptr}.
   JavaScriptFrame* osr_frame_ = nullptr;
 
-  Type::FunctionType* function_type_;
-
   const char* debug_name_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilationInfo);
@@ -651,8 +642,6 @@ class Compiler : public AllStatic {
       Handle<JSFunction> function);
   MUST_USE_RESULT static MaybeHandle<Code> GetLazyCode(
       Handle<JSFunction> function);
-  MUST_USE_RESULT static MaybeHandle<Code> GetStubCode(
-      Handle<JSFunction> function, CodeStub* stub);
 
   static bool Compile(Handle<JSFunction> function, ClearExceptionFlag flag);
   static bool CompileDebugCode(Handle<JSFunction> function);

src/compiler/pipeline.cc

@@ -1141,7 +1141,7 @@ Handle<Code> Pipeline::GenerateCode() {
                           info()->is_deoptimization_enabled()
                               ? Typer::kDeoptimizationEnabled
                               : Typer::kNoFlags,
-                          info()->dependencies(), info()->function_type()));
+                          info()->dependencies()));
     Run<TyperPhase>(typer.get());
     RunPrintAndVerify("Typed");
   }