Remove unused StubType's, freeing 2 bits in Code objects.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/75973005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@17867 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/stub-cache-arm.cc

@@ -1650,7 +1650,7 @@ Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
   GenerateMissBranch();
 
   // Return the generated code.
-  return GetCode(Code::FIELD, name);
+  return GetCode(Code::FAST, name);
 }
 
 
@@ -2681,7 +2681,7 @@ Handle<Code> CallStubCompiler::CompileCallConstant(
     Handle<Code> code = CompileCustomCall(object, holder,
                                           Handle<Cell>::null(),
                                           function, Handle<String>::cast(name),
-                                          Code::CONSTANT);
+                                          Code::FAST);
     // A null handle means bail out to the regular compiler code below.
     if (!code.is_null()) return code;
   }
@@ -2728,7 +2728,7 @@ Handle<Code> CallStubCompiler::CompileCallInterceptor(Handle<JSObject> object,
   GenerateMissBranch();
 
   // Return the generated code.
-  return GetCode(Code::INTERCEPTOR, name);
+  return GetCode(Code::FAST, name);
 }
 
 
@@ -2814,7 +2814,7 @@ Handle<Code> StoreStubCompiler::CompileStoreCallback(
   __ TailCallExternalReference(store_callback_property, 4, 1);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2830,7 +2830,7 @@ Handle<Code> StoreStubCompiler::CompileStoreCallback(
       masm(), call_optimization, receiver(), scratch3(), 1, values);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2913,7 +2913,7 @@ Handle<Code> StoreStubCompiler::CompileStoreInterceptor(
   TailCallBuiltin(masm(), MissBuiltin(kind()));
 
   // Return the generated code.
-  return GetCode(kind(), Code::INTERCEPTOR, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2930,7 +2930,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(
   __ Ret();
 
   // Return the generated code.
-  return GetCode(kind(), Code::NONEXISTENT, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 

src/code-stubs.h

@@ -931,7 +931,7 @@ class LoadFieldStub: public HandlerStub {
     return UnboxedDoubleBits::decode(bit_field_);
   }
 
-  virtual Code::StubType GetStubType() { return Code::FIELD; }
+  virtual Code::StubType GetStubType() { return Code::FAST; }
 
  protected:
   LoadFieldStub() : HandlerStub() { }

src/ia32/stub-cache-ia32.cc

@@ -1671,7 +1671,7 @@ Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
   GenerateMissBranch();
 
   // Return the generated code.
-  return GetCode(Code::FIELD, name);
+  return GetCode(Code::FAST, name);
 }
 
 
@@ -2752,7 +2752,7 @@ Handle<Code> CallStubCompiler::CompileCallConstant(
     Handle<Code> code = CompileCustomCall(object, holder,
                                           Handle<Cell>::null(),
                                           function, Handle<String>::cast(name),
-                                          Code::CONSTANT);
+                                          Code::FAST);
     // A null handle means bail out to the regular compiler code below.
     if (!code.is_null()) return code;
   }
@@ -2820,7 +2820,7 @@ Handle<Code> CallStubCompiler::CompileCallInterceptor(Handle<JSObject> object,
   GenerateMissBranch();
 
   // Return the generated code.
-  return GetCode(Code::INTERCEPTOR, name);
+  return GetCode(Code::FAST, name);
 }
 
 
@@ -2907,7 +2907,7 @@ Handle<Code> StoreStubCompiler::CompileStoreCallback(
   __ TailCallExternalReference(store_callback_property, 4, 1);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2923,7 +2923,7 @@ Handle<Code> StoreStubCompiler::CompileStoreCallback(
       masm(), call_optimization, receiver(), scratch1(), 1, values);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2990,7 +2990,7 @@ Handle<Code> StoreStubCompiler::CompileStoreInterceptor(
   __ TailCallExternalReference(store_ic_property, 4, 1);
 
   // Return the generated code.
-  return GetCode(kind(), Code::INTERCEPTOR, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -3035,7 +3035,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(
   __ ret(0);
 
   // Return the generated code.
-  return GetCode(kind(), Code::NONEXISTENT, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 

src/objects.cc

@@ -11075,12 +11075,7 @@ const char* Code::ICState2String(InlineCacheState state) {
 const char* Code::StubType2String(StubType type) {
   switch (type) {
     case NORMAL: return "NORMAL";
-    case FIELD: return "FIELD";
-    case CONSTANT: return "CONSTANT";
-    case CALLBACKS: return "CALLBACKS";
-    case INTERCEPTOR: return "INTERCEPTOR";
-    case TRANSITION: return "TRANSITION";
-    case NONEXISTENT: return "NONEXISTENT";
+    case FAST: return "FAST";
   }
   UNREACHABLE();  // keep the compiler happy
   return NULL;

src/objects.h

@@ -5033,12 +5033,7 @@ class Code: public HeapObject {
   // Types of stubs.
   enum StubType {
     NORMAL,
-    FIELD,
-    CONSTANT,
-    CALLBACKS,
-    INTERCEPTOR,
-    TRANSITION,
-    NONEXISTENT
+    FAST
   };
 
   typedef int ExtraICState;
@@ -5464,7 +5459,7 @@ class Code: public HeapObject {
 
   // Flags layout.  BitField<type, shift, size>.
   class ICStateField: public BitField<InlineCacheState, 0, 3> {};
-  class TypeField: public BitField<StubType, 3, 3> {};
+  class TypeField: public BitField<StubType, 3, 1> {};
   class CacheHolderField: public BitField<InlineCacheHolderFlag, 6, 1> {};
   class KindField: public BitField<Kind, 7, 4> {};
   class IsPregeneratedField: public BitField<bool, 11, 1> {};

src/stub-cache.cc

@@ -292,7 +292,7 @@ Handle<Code> StubCache::ComputeCallConstant(int argc,
   }
 
   Code::Flags flags = Code::ComputeMonomorphicFlags(
-      kind, extra_state, cache_holder, Code::CONSTANT, argc);
+      kind, extra_state, cache_holder, Code::FAST, argc);
   Handle<Object> probe(stub_holder->map()->FindInCodeCache(*name, flags),
                        isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
@@ -334,7 +334,7 @@ Handle<Code> StubCache::ComputeCallField(int argc,
   }
 
   Code::Flags flags = Code::ComputeMonomorphicFlags(
-      kind, extra_state, cache_holder, Code::FIELD, argc);
+      kind, extra_state, cache_holder, Code::FAST, argc);
   Handle<Object> probe(stub_holder->map()->FindInCodeCache(*name, flags),
                        isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
@@ -372,7 +372,7 @@ Handle<Code> StubCache::ComputeCallInterceptor(int argc,
   }
 
   Code::Flags flags = Code::ComputeMonomorphicFlags(
-      kind, extra_state, cache_holder, Code::INTERCEPTOR, argc);
+      kind, extra_state, cache_holder, Code::FAST, argc);
   Handle<Object> probe(stub_holder->map()->FindInCodeCache(*name, flags),
                        isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
@@ -1259,7 +1259,7 @@ Handle<Code> LoadStubCompiler::CompileLoadField(
   TailCallBuiltin(masm(), MissBuiltin(kind()));
 
   // Return the generated code.
-  return GetCode(kind(), Code::FIELD, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1272,7 +1272,7 @@ Handle<Code> LoadStubCompiler::CompileLoadConstant(
   GenerateLoadConstant(value);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CONSTANT, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1286,7 +1286,7 @@ Handle<Code> LoadStubCompiler::CompileLoadCallback(
   GenerateLoadCallback(reg, callback);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1301,7 +1301,7 @@ Handle<Code> LoadStubCompiler::CompileLoadCallback(
   GenerateLoadCallback(call_optimization);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1318,7 +1318,7 @@ Handle<Code> LoadStubCompiler::CompileLoadInterceptor(
   GenerateLoadInterceptor(reg, object, holder, &lookup, name);
 
   // Return the generated code.
-  return GetCode(kind(), Code::INTERCEPTOR, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1378,7 +1378,7 @@ Handle<Code> LoadStubCompiler::CompileLoadViaGetter(
   GenerateLoadViaGetter(masm(), receiver(), getter);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1435,7 +1435,7 @@ Handle<Code> StoreStubCompiler::CompileStoreTransition(
   TailCallBuiltin(masm(), SlowBuiltin(kind()));
 
   // Return the generated code.
-  return GetCode(kind(), Code::TRANSITION, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1458,7 +1458,7 @@ Handle<Code> StoreStubCompiler::CompileStoreField(Handle<JSObject> object,
   TailCallBuiltin(masm(), MissBuiltin(kind()));
 
   // Return the generated code.
-  return GetCode(kind(), Code::FIELD, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1470,7 +1470,7 @@ Handle<Code> StoreStubCompiler::CompileStoreViaSetter(
   HandlerFrontend(object, receiver(), holder, name);
   GenerateStoreViaSetter(masm(), setter);
 
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -1757,7 +1757,7 @@ Handle<Code> CallStubCompiler::GetCode(Handle<JSFunction> function) {
   if (function->shared()->name()->IsString()) {
     function_name = Handle<String>(String::cast(function->shared()->name()));
   }
-  return GetCode(Code::CONSTANT, function_name);
+  return GetCode(Code::FAST, function_name);
 }
 
 

src/x64/stub-cache-x64.cc

@@ -1595,7 +1595,7 @@ Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
   GenerateMissBranch();
 
   // Return the generated code.
-  return GetCode(Code::FIELD, name);
+  return GetCode(Code::FAST, name);
 }
 
 
@@ -2652,7 +2652,7 @@ Handle<Code> CallStubCompiler::CompileCallConstant(
     Handle<Code> code = CompileCustomCall(object, holder,
                                           Handle<PropertyCell>::null(),
                                           function, Handle<String>::cast(name),
-                                          Code::CONSTANT);
+                                          Code::FAST);
     // A null handle means bail out to the regular compiler code below.
     if (!code.is_null()) return code;
   }
@@ -2720,7 +2720,7 @@ Handle<Code> CallStubCompiler::CompileCallInterceptor(Handle<JSObject> object,
   GenerateMissBranch();
 
   // Return the generated code.
-  return GetCode(Code::INTERCEPTOR, name);
+  return GetCode(Code::FAST, name);
 }
 
 
@@ -2808,7 +2808,7 @@ Handle<Code> StoreStubCompiler::CompileStoreCallback(
   __ TailCallExternalReference(store_callback_property, 4, 1);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2824,7 +2824,7 @@ Handle<Code> StoreStubCompiler::CompileStoreCallback(
       masm(), call_optimization, receiver(), scratch3(), 1, values);
 
   // Return the generated code.
-  return GetCode(kind(), Code::CALLBACKS, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2891,7 +2891,7 @@ Handle<Code> StoreStubCompiler::CompileStoreInterceptor(
   __ TailCallExternalReference(store_ic_property, 4, 1);
 
   // Return the generated code.
-  return GetCode(kind(), Code::INTERCEPTOR, name);
+  return GetCode(kind(), Code::FAST, name);
 }
 
 
@@ -2943,7 +2943,7 @@ Handle<Code> LoadStubCompiler::CompileLoadNonexistent(
   __ ret(0);
 
   // Return the generated code.
-  return GetCode(kind(), Code::NONEXISTENT, name);
+  return GetCode(kind(), Code::FAST, name);
 }