Vector ICs: Get rid of stack arguments on ia32 transitioning stores.

src/code-stubs.h

 // Copyright 2012 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.
 
 #ifndef V8_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 1226 matching lines @@
     DCHECK(FLAG_vector_stores);
     return VectorStoreTransitionDescriptor::SlotRegister();
   }
 
   static Register VectorRegister() {
     DCHECK(FLAG_vector_stores);
     return VectorStoreTransitionDescriptor::VectorRegister();
   }
 
   static Register MapRegister() {
-    return FLAG_vector_stores ? VectorStoreTransitionDescriptor::MapRegister()
-                              : StoreTransitionDescriptor::MapRegister();
+    if (FLAG_vector_stores) {
+      return VectorStoreTransitionDescriptor::MapRegister();
+    }
+    return StoreTransitionDescriptor::MapRegister();
   }
 
   static int ReceiverIndex() {
     return StoreTransitionDescriptor::kReceiverIndex;
   }
 
   static int NameIndex() { return StoreTransitionDescriptor::kReceiverIndex; }
 
   static int ValueIndex() { return StoreTransitionDescriptor::kValueIndex; }
 
-  static int SlotIndex() {
-    DCHECK(FLAG_vector_stores);
-    return VectorStoreTransitionDescriptor::kSlotIndex;
+  static int MapIndex() {
+    DCHECK(static_cast<int>(VectorStoreTransitionDescriptor::kMapIndex) ==
+           static_cast<int>(StoreTransitionDescriptor::kMapIndex));
+    return StoreTransitionDescriptor::kMapIndex;
   }
 
   static int VectorIndex() {
     DCHECK(FLAG_vector_stores);
+    if (HasVirtualSlotArg()) {
+      return VectorStoreTransitionDescriptor::kVirtualSlotVectorIndex;
+    }
     return VectorStoreTransitionDescriptor::kVectorIndex;
   }
 
-  static int MapIndex() {
-    if (FLAG_vector_stores) {
-      return VectorStoreTransitionDescriptor::kMapIndex;
-    }
-    return StoreTransitionDescriptor::kMapIndex;
+  // Some platforms don't have a slot arg.
+  static bool HasVirtualSlotArg() {
+    if (!FLAG_vector_stores) return false;
+    return SlotRegister().is(no_reg);
   }
-
-  // Some platforms push Slot, Vector, Map on the stack instead of in
-  // registers.
-  static bool UsesStackArgs() { return MapRegister().is(no_reg); }
 };
 
 
 class StoreTransitionStub : public HandlerStub {
  public:
   enum StoreMode {
     StoreMapOnly,
     StoreMapAndValue,
     ExtendStorageAndStoreMapAndValue
   };
@@ skipping 1807 matching lines @@
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 
 extern Representation RepresentationFromType(Type* type);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODE_STUBS_H_