Reland Vector ICs: platform support for vector-based stores.

src/ic/arm/stub-cache-arm.cc

Index: src/ic/arm/stub-cache-arm.cc
diff --git a/src/ic/arm/stub-cache-arm.cc b/src/ic/arm/stub-cache-arm.cc
index cdd04faf388c3a514cd5cd3ea50d4c5136ffacf2..86710eb29a8f83240fe5292f2d0ed384a18b7887 100644
--- a/src/ic/arm/stub-cache-arm.cc
+++ b/src/ic/arm/stub-cache-arm.cc
@@ -120,8 +120,14 @@ void StubCache::GenerateProbe(MacroAssembler* masm, Code::Kind ic_kind,
   // extra3 don't conflict with the vector and slot registers, which need
   // to be preserved for a handler call or miss.
   if (IC::ICUseVector(ic_kind)) {
-    Register vector = LoadWithVectorDescriptor::VectorRegister();
-    Register slot = LoadWithVectorDescriptor::SlotRegister();
+    Register vector, slot;
+    if (ic_kind == Code::STORE_IC || ic_kind == Code::KEYED_STORE_IC) {
+      vector = VectorStoreICDescriptor::VectorRegister();
+      slot = VectorStoreICDescriptor::SlotRegister();
+    } else {
+      vector = LoadWithVectorDescriptor::VectorRegister();
+      slot = LoadWithVectorDescriptor::SlotRegister();
+    }
     DCHECK(!AreAliased(vector, slot, scratch, extra, extra2, extra3));
   }
 #endif