Hydrogen code stubs for vector-based ICs.

src/ic/handler-compiler.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/v8.h"
 
 #include "src/ic/call-optimization.h"
 #include "src/ic/handler-compiler.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-inl.h"
@@ skipping 111 matching lines @@
 // Frontend for store uses the name register. It has to be restored before a
 // miss.
 Register NamedStoreHandlerCompiler::FrontendHeader(Register object_reg,
                                                    Handle<Name> name,
                                                    Label* miss) {
   return CheckPrototypes(object_reg, this->name(), scratch1(), scratch2(), name,
                          miss, SKIP_RECEIVER);
 }
 
 
-Register PropertyHandlerCompiler::Frontend(Register object_reg,
-                                           Handle<Name> name) {
+Register PropertyHandlerCompiler::Frontend(Handle<Name> name) {
   Label miss;
-  Register reg = FrontendHeader(object_reg, name, &miss);
+  if (IC::ICUseVector(kind())) {
+    PushVectorAndSlot();
+  }
+  Register reg = FrontendHeader(receiver(), name, &miss);
   FrontendFooter(name, &miss);
+  // The footer consumes the vector and slot from the stack if miss occurs.
+  if (IC::ICUseVector(kind())) {
+    DiscardVectorAndSlot();
+  }
   return reg;
 }
 
 
 void PropertyHandlerCompiler::NonexistentFrontendHeader(Handle<Name> name,
                                                         Label* miss,
                                                         Register scratch1,
                                                         Register scratch2) {
   Register holder_reg;
   Handle<Map> last_map;
@@ skipping 25 matching lines @@
                  NameDictionary::kNotFound);
       GenerateDictionaryNegativeLookup(masm(), miss, holder_reg, name, scratch1,
                                        scratch2);
     }
   }
 }
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadField(Handle<Name> name,
                                                         FieldIndex field) {
-  Register reg = Frontend(receiver(), name);
+  Register reg = Frontend(name);
   __ Move(receiver(), reg);
   LoadFieldStub stub(isolate(), field);
   GenerateTailCall(masm(), stub.GetCode());
   return GetCode(kind(), Code::FAST, name);
 }
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadConstant(Handle<Name> name,
                                                            int constant_index) {
-  Register reg = Frontend(receiver(), name);
+  Register reg = Frontend(name);
   __ Move(receiver(), reg);
   LoadConstantStub stub(isolate(), constant_index);
   GenerateTailCall(masm(), stub.GetCode());
   return GetCode(kind(), Code::FAST, name);
 }
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadNonexistent(
     Handle<Name> name) {
   Label miss;
+  if (IC::ICUseVector(kind())) {
+    DCHECK(kind() == Code::LOAD_IC);
+    PushVectorAndSlot();
+  }
   NonexistentFrontendHeader(name, &miss, scratch2(), scratch3());
+  if (IC::ICUseVector(kind())) {
+    DiscardVectorAndSlot();
+  }
   GenerateLoadConstant(isolate()->factory()->undefined_value());
   FrontendFooter(name, &miss);
   return GetCode(kind(), Code::FAST, name);
 }
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadCallback(
     Handle<Name> name, Handle<ExecutableAccessorInfo> callback) {
-  Register reg = Frontend(receiver(), name);
+  Register reg = Frontend(name);
   GenerateLoadCallback(reg, callback);
   return GetCode(kind(), Code::FAST, name);
 }
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadCallback(
     Handle<Name> name, const CallOptimization& call_optimization) {
   DCHECK(call_optimization.is_simple_api_call());
-  Frontend(receiver(), name);
+  Frontend(name);
   Handle<Map> receiver_map = IC::TypeToMap(*type(), isolate());
   GenerateFastApiCall(masm(), call_optimization, receiver_map, receiver(),
                       scratch1(), false, 0, NULL);
   return GetCode(kind(), Code::FAST, name);
 }
 
 
+void NamedLoadHandlerCompiler::InterceptorVectorSlotPush(Register holder_reg) {
+  if (IC::ICUseVector(kind())) {
+    if (holder_reg.is(receiver())) {
+      PushVectorAndSlot();
+    } else {
+      DCHECK(holder_reg.is(scratch1()));
+      PushVectorAndSlot(scratch2(), scratch3());
+    }
+  }
+}
+
+
+void NamedLoadHandlerCompiler::InterceptorVectorSlotPop(Register holder_reg,
+                                                        PopMode mode) {
+  if (IC::ICUseVector(kind())) {
+    if (mode == DISCARD) {
+      DiscardVectorAndSlot();
+    } else {
+      if (holder_reg.is(receiver())) {
+        PopVectorAndSlot();
+      } else {
+        DCHECK(holder_reg.is(scratch1()));
+        PopVectorAndSlot(scratch2(), scratch3());
+      }
+    }
+  }
+}
+
+
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadInterceptor(
     LookupIterator* it) {
   // So far the most popular follow ups for interceptor loads are FIELD and
   // ExecutableAccessorInfo, so inline only them. Other cases may be added
   // later.
   bool inline_followup = false;
   switch (it->state()) {
     case LookupIterator::TRANSITION:
       UNREACHABLE();
     case LookupIterator::ACCESS_CHECK:
@@ skipping 10 matching lines @@
       inline_followup = accessors->IsExecutableAccessorInfo();
       if (!inline_followup) break;
       Handle<ExecutableAccessorInfo> info =
           Handle<ExecutableAccessorInfo>::cast(accessors);
       inline_followup = info->getter() != NULL &&
                         ExecutableAccessorInfo::IsCompatibleReceiverType(
                             isolate(), info, type());
     }
   }
 
-  Register reg = Frontend(receiver(), it->name());
+  Label miss;
+  InterceptorVectorSlotPush(receiver());
+  Register reg = FrontendHeader(receiver(), it->name(), &miss);
+  FrontendFooter(it->name(), &miss);
+  InterceptorVectorSlotPop(reg);
+
   if (inline_followup) {
     // TODO(368): Compile in the whole chain: all the interceptors in
     // prototypes and ultimate answer.
     GenerateLoadInterceptorWithFollowup(it, reg);
   } else {
     GenerateLoadInterceptor(reg);
   }
   return GetCode(kind(), Code::FAST, it->name());
 }
 
 
 void NamedLoadHandlerCompiler::GenerateLoadPostInterceptor(
     LookupIterator* it, Register interceptor_reg) {
   Handle<JSObject> real_named_property_holder(it->GetHolder<JSObject>());
 
   set_type_for_object(holder());
   set_holder(real_named_property_holder);
-  Register reg = Frontend(interceptor_reg, it->name());
+
+  Label miss;
+  InterceptorVectorSlotPush(interceptor_reg);
+  Register reg = FrontendHeader(interceptor_reg, it->name(), &miss);
+  FrontendFooter(it->name(), &miss);
+  // We discard the vector and slot now because we don't miss below this point.
+  InterceptorVectorSlotPop(reg, DISCARD);
 
   switch (it->state()) {
     case LookupIterator::ACCESS_CHECK:
     case LookupIterator::INTERCEPTOR:
     case LookupIterator::JSPROXY:
     case LookupIterator::NOT_FOUND:
     case LookupIterator::TRANSITION:
       UNREACHABLE();
     case LookupIterator::DATA: {
       DCHECK_EQ(FIELD, it->property_details().type());
       __ Move(receiver(), reg);
       LoadFieldStub stub(isolate(), it->GetFieldIndex());
       GenerateTailCall(masm(), stub.GetCode());
       break;
     }
     case LookupIterator::ACCESSOR:
       Handle<ExecutableAccessorInfo> info =
           Handle<ExecutableAccessorInfo>::cast(it->GetAccessors());
       DCHECK_NE(NULL, info->getter());
       GenerateLoadCallback(reg, info);
   }
 }
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadViaGetter(
     Handle<Name> name, Handle<JSFunction> getter) {
-  Frontend(receiver(), name);
+  Frontend(name);
   GenerateLoadViaGetter(masm(), type(), receiver(), getter);
   return GetCode(kind(), Code::FAST, name);
 }
 
 
 // TODO(verwaest): Cleanup. holder() is actually the receiver.
 Handle<Code> NamedStoreHandlerCompiler::CompileStoreTransition(
     Handle<Map> transition, Handle<Name> name) {
   Label miss;
 
@@ skipping 67 matching lines @@
   GenerateTailCall(masm(), stub.GetCode());
 
   __ bind(&miss);
   TailCallBuiltin(masm(), MissBuiltin(kind()));
   return GetCode(kind(), Code::FAST, it->name());
 }
 
 
 Handle<Code> NamedStoreHandlerCompiler::CompileStoreViaSetter(
     Handle<JSObject> object, Handle<Name> name, Handle<JSFunction> setter) {
-  Frontend(receiver(), name);
+  Frontend(name);
   GenerateStoreViaSetter(masm(), type(), receiver(), setter);
 
   return GetCode(kind(), Code::FAST, name);
 }
 
 
 Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback(
     Handle<JSObject> object, Handle<Name> name,
     const CallOptimization& call_optimization) {
-  Frontend(receiver(), name);
+  Frontend(name);
   Register values[] = {value()};
   GenerateFastApiCall(masm(), call_optimization, handle(object->map()),
                       receiver(), scratch1(), true, 1, values);
   return GetCode(kind(), Code::FAST, name);
 }
 
 
 #undef __
 
 
@@ skipping 23 matching lines @@
         DCHECK(elements_kind == DICTIONARY_ELEMENTS);
         cached_stub = LoadDictionaryElementStub(isolate()).GetCode();
       }
     }
 
     handlers->Add(cached_stub);
   }
 }
 }
 }  // namespace v8::internal