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

src/interface-descriptors.h

 // 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.
 
 #ifndef V8_CALL_INTERFACE_DESCRIPTOR_H_
 #define V8_CALL_INTERFACE_DESCRIPTOR_H_
 
 #include "src/assembler.h"
 #include "src/macro-assembler.h"
 
@@ skipping 263 matching lines @@
 };
 
 
 class VectorStoreTransitionDescriptor : public StoreDescriptor {
  public:
   DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(VectorStoreTransitionDescriptor,
                                                StoreDescriptor)
 
   // Extends StoreDescriptor with Map parameter.
   enum ParameterIndices {
-    kReceiverIndex,
-    kNameIndex,
-    kValueIndex,
-    kSlotIndex,
-    kVectorIndex,
-    kMapIndex,
-    kParameterCount
+    kReceiverIndex = 0,
+    kNameIndex = 1,
+    kValueIndex = 2,
+
+    kMapIndex = 3,
+
+    kSlotIndex = 4,  // not present on ia32.
+    kVirtualSlotVectorIndex = 4,
+
+    kVectorIndex = 5
   };
 
-  // These registers are no_reg for ia32, using the stack instead.
+  static const Register MapRegister();
   static const Register SlotRegister();
   static const Register VectorRegister();
-  static const Register MapRegister();
 };
 
 
 class InstanceOfDescriptor final : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(InstanceOfDescriptor, CallInterfaceDescriptor)
 
   enum ParameterIndices { kLeftIndex, kRightIndex, kParameterCount };
   static const Register LeftRegister();
   static const Register RightRegister();
@@ skipping 426 matching lines @@
 }  // namespace v8
 
 
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/interface-descriptors-arm64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "src/arm/interface-descriptors-arm.h"
 #endif
 
 #endif  // V8_CALL_INTERFACE_DESCRIPTOR_H_