Added LoadIC stub for getters.

Removed some dead constants on the way.

Review URL: https://chromiumcodereview.appspot.com/10515008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11735 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/stub-cache-arm.cc

@@ -2835,6 +2835,43 @@ Handle<Code> LoadStubCompiler::CompileLoadCallback(
 }
 
 
+Handle<Code> LoadStubCompiler::CompileLoadViaGetter(
+    Handle<String> name,
+    Handle<JSObject> receiver,
+    Handle<JSObject> holder,
+    Handle<JSFunction> getter) {
+  // ----------- S t a t e -------------
+  //  -- r0    : receiver
+  //  -- r2    : name
+  //  -- lr    : return address
+  // -----------------------------------
+  Label miss;
+
+  // Check that the maps haven't changed.
+  __ JumpIfSmi(r0, &miss);
+  CheckPrototypes(receiver, r0, holder, r3, r4, r1, name, &miss);
+
+  {
+    FrameScope scope(masm(), StackFrame::INTERNAL);
+
+    // Call the JavaScript getter with the receiver on the stack.
+    __ push(r0);
+    __ InvokeFunction(getter, ParameterCount(0), CALL_FUNCTION,
+                      NullCallWrapper(), CALL_AS_METHOD);
+
+    // Restore context register.
+    __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
+  }
+  __ Ret();
+
+  __ bind(&miss);
+  GenerateLoadMiss(masm(), Code::LOAD_IC);
+
+  // Return the generated code.
+  return GetCode(CALLBACKS, name);
+}
+
+
 Handle<Code> LoadStubCompiler::CompileLoadConstant(Handle<JSObject> object,
                                                    Handle<JSObject> holder,
                                                    Handle<JSFunction> value,

src/ia32/stub-cache-ia32.cc

@@ -2860,6 +2860,43 @@ Handle<Code> LoadStubCompiler::CompileLoadCallback(
 }
 
 
+Handle<Code> LoadStubCompiler::CompileLoadViaGetter(
+    Handle<String> name,
+    Handle<JSObject> receiver,
+    Handle<JSObject> holder,
+    Handle<JSFunction> getter) {
+  // ----------- S t a t e -------------
+  //  -- ecx    : name
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+  Label miss;
+
+  // Check that the maps haven't changed.
+  __ JumpIfSmi(edx, &miss);
+  CheckPrototypes(receiver, edx, holder, ebx, eax, edi, name, &miss);
+
+  {
+    FrameScope scope(masm(), StackFrame::INTERNAL);
+
+    // Call the JavaScript getter with the receiver on the stack.
+    __ push(edx);
+    __ InvokeFunction(getter, ParameterCount(0), CALL_FUNCTION,
+                      NullCallWrapper(), CALL_AS_METHOD);
+
+    // Restore context register.
+    __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
+  }
+  __ ret(0);
+
+  __ bind(&miss);
+  GenerateLoadMiss(masm(), Code::LOAD_IC);
+
+  // Return the generated code.
+  return GetCode(CALLBACKS, name);
+}
+
+
 Handle<Code> LoadStubCompiler::CompileLoadConstant(Handle<JSObject> object,
                                                    Handle<JSObject> holder,
                                                    Handle<JSFunction> value,

src/ic.cc

@@ -988,14 +988,25 @@ void LoadIC::UpdateCaches(LookupResult* lookup,
         }
         break;
       case CALLBACKS: {
-        Handle<Object> callback_object(lookup->GetCallbackObject());
-        if (!callback_object->IsAccessorInfo()) return;
-        Handle<AccessorInfo> callback =
-            Handle<AccessorInfo>::cast(callback_object);
-        if (v8::ToCData<Address>(callback->getter()) == 0) return;
-        if (!callback->IsCompatibleReceiver(*receiver)) return;
-        code = isolate()->stub_cache()->ComputeLoadCallback(
-            name, receiver, holder, callback);
+        Handle<Object> callback(lookup->GetCallbackObject());
+        if (callback->IsAccessorInfo()) {
+          Handle<AccessorInfo> info = Handle<AccessorInfo>::cast(callback);
+          if (v8::ToCData<Address>(info->getter()) == 0) return;
+          if (!info->IsCompatibleReceiver(*receiver)) return;
+          code = isolate()->stub_cache()->ComputeLoadCallback(
+              name, receiver, holder, info);
+        } else if (callback->IsAccessorPair()) {
+          Handle<Object> getter(Handle<AccessorPair>::cast(callback)->getter());
+          if (!getter->IsJSFunction()) return;
+          if (holder->IsGlobalObject()) return;
+          if (!receiver->HasFastProperties()) return;
+          code = isolate()->stub_cache()->ComputeLoadViaGetter(
+              name, receiver, holder, Handle<JSFunction>::cast(getter));
+        } else {
+          ASSERT(callback->IsForeign());
+          // No IC support for old-style native accessors.
+          return;
+        }
         break;
       }
       case INTERCEPTOR:

src/mips/stub-cache-mips.cc

@@ -2839,6 +2839,43 @@ Handle<Code> LoadStubCompiler::CompileLoadCallback(
 }
 
 
+Handle<Code> LoadStubCompiler::CompileLoadViaGetter(
+    Handle<String> name,
+    Handle<JSObject> receiver,
+    Handle<JSObject> holder,
+    Handle<JSFunction> getter) {
+  // ----------- S t a t e -------------
+  //  -- a0    : receiver
+  //  -- a2    : name
+  //  -- ra    : return address
+  // -----------------------------------
+  Label miss;
+
+  // Check that the maps haven't changed.
+  __ JumpIfSmi(a0, &miss);
+  CheckPrototypes(receiver, a0, holder, a3, t0, a1, name, &miss);
+
+  {
+    FrameScope scope(masm(), StackFrame::INTERNAL);
+
+    // Call the JavaScript getter with the receiver on the stack.
+    __ push(a0);
+    __ InvokeFunction(getter, ParameterCount(0), CALL_FUNCTION,
+                      NullCallWrapper(), CALL_AS_METHOD);
+
+    // Restore context register.
+    __ lw(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
+  }
+  __ Ret();
+
+  __ bind(&miss);
+  GenerateLoadMiss(masm(), Code::LOAD_IC);
+
+  // Return the generated code.
+  return GetCode(CALLBACKS, name);
+}
+
+
 Handle<Code> LoadStubCompiler::CompileLoadConstant(Handle<JSObject> object,
                                                    Handle<JSObject> holder,
                                                    Handle<JSFunction> value,

src/objects.h

@@ -5010,11 +5010,6 @@ class Map: public HeapObject {
   static const int kFunctionWithPrototype = 1;
   static const int kUsedForPrototype = 2;
 
-  // Layout of the default cache. It holds alternating name and code objects.
-  static const int kCodeCacheEntrySize = 2;
-  static const int kCodeCacheEntryNameOffset = 0;
-  static const int kCodeCacheEntryCodeOffset = 1;
-
   typedef FixedBodyDescriptor<kPointerFieldsBeginOffset,
                               kPointerFieldsEndOffset,
                               kSize> BodyDescriptor;

src/stub-cache.cc

@@ -171,6 +171,25 @@ Handle<Code> StubCache::ComputeLoadCallback(Handle<String> name,
 }
 
 
+Handle<Code> StubCache::ComputeLoadViaGetter(Handle<String> name,
+                                             Handle<JSObject> receiver,
+                                             Handle<JSObject> holder,
+                                             Handle<JSFunction> getter) {
+  ASSERT(IC::GetCodeCacheForObject(*receiver, *holder) == OWN_MAP);
+  Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, CALLBACKS);
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags));
+  if (probe->IsCode()) return Handle<Code>::cast(probe);
+
+  LoadStubCompiler compiler(isolate_);
+  Handle<Code> code =
+      compiler.CompileLoadViaGetter(name, receiver, holder, getter);
+  PROFILE(isolate_, CodeCreateEvent(Logger::LOAD_IC_TAG, *code, *name));
+  GDBJIT(AddCode(GDBJITInterface::LOAD_IC, *name, *code));
+  JSObject::UpdateMapCodeCache(receiver, name, code);
+  return code;
+}
+
+
 Handle<Code> StubCache::ComputeLoadConstant(Handle<String> name,
                                             Handle<JSObject> receiver,
                                             Handle<JSObject> holder,

src/stub-cache.h

@@ -90,6 +90,11 @@ class StubCache {
                                    Handle<JSObject> holder,
                                    Handle<AccessorInfo> callback);
 
+  Handle<Code> ComputeLoadViaGetter(Handle<String> name,
+                                    Handle<JSObject> receiver,
+                                    Handle<JSObject> holder,
+                                    Handle<JSFunction> getter);
+
   Handle<Code> ComputeLoadConstant(Handle<String> name,
                                    Handle<JSObject> receiver,
                                    Handle<JSObject> holder,
@@ -596,6 +601,11 @@ class LoadStubCompiler: public StubCompiler {
                                    Handle<JSObject> holder,
                                    Handle<AccessorInfo> callback);
 
+  Handle<Code> CompileLoadViaGetter(Handle<String> name,
+                                    Handle<JSObject> receiver,
+                                    Handle<JSObject> holder,
+                                    Handle<JSFunction> getter);
+
   Handle<Code> CompileLoadConstant(Handle<JSObject> object,
                                    Handle<JSObject> holder,
                                    Handle<JSFunction> value,

src/x64/stub-cache-x64.cc

@@ -2698,6 +2698,43 @@ Handle<Code> LoadStubCompiler::CompileLoadCallback(
 }
 
 
+Handle<Code> LoadStubCompiler::CompileLoadViaGetter(
+    Handle<String> name,
+    Handle<JSObject> receiver,
+    Handle<JSObject> holder,
+    Handle<JSFunction> getter) {
+  // ----------- S t a t e -------------
+  //  -- rax    : receiver
+  //  -- rcx    : name
+  //  -- rsp[0] : return address
+  // -----------------------------------
+  Label miss;
+
+  // Check that the maps haven't changed.
+  __ JumpIfSmi(rax, &miss);
+  CheckPrototypes(receiver, rax, holder, rbx, rdx, rdi, name, &miss);
+
+  {
+    FrameScope scope(masm(), StackFrame::INTERNAL);
+
+    // Call the JavaScript getter with the receiver on the stack.
+    __ push(rax);
+    __ InvokeFunction(getter, ParameterCount(0), CALL_FUNCTION,
+                      NullCallWrapper(), CALL_AS_METHOD);
+
+    // Restore context register.
+    __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
+  }
+  __ ret(0);
+
+  __ bind(&miss);
+  GenerateLoadMiss(masm(), Code::LOAD_IC);
+
+  // Return the generated code.
+  return GetCode(CALLBACKS, name);
+}
+
+
 Handle<Code> LoadStubCompiler::CompileLoadConstant(Handle<JSObject> object,
                                                    Handle<JSObject> holder,
                                                    Handle<JSFunction> value,