Revert of Vector ICs: platform support for vector-based stores.

src/ic/x64/ic-x64.cc

Index: src/ic/x64/ic-x64.cc
diff --git a/src/ic/x64/ic-x64.cc b/src/ic/x64/ic-x64.cc
index ff74a965e43aaf67314a06419580ba35adc02afb..8d334809cba854202f78fb065104e14f376bb888 100644
--- a/src/ic/x64/ic-x64.cc
+++ b/src/ic/x64/ic-x64.cc
@@ -582,7 +582,7 @@
   Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
       Code::ComputeHandlerFlags(Code::STORE_IC));
   masm->isolate()->stub_cache()->GenerateProbe(masm, Code::STORE_IC, flags,
-                                               receiver, key, r9, no_reg);
+                                               receiver, key, rbx, no_reg);
   // Cache miss.
   __ jmp(&miss);
 
@@ -735,13 +735,8 @@
 
 
 void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
-  if (FLAG_vector_stores) {
-    // This shouldn't be called.
-    __ int3();
-    return;
-  }
-
   // The return address is on the stack.
+
   // Get the receiver from the stack and probe the stub cache.
   Code::Flags flags = Code::RemoveTypeAndHolderFromFlags(
       Code::ComputeHandlerFlags(Code::STORE_IC));
@@ -790,10 +785,7 @@
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register name = StoreDescriptor::NameRegister();
   Register value = StoreDescriptor::ValueRegister();
-  Register dictionary = r11;
-  DCHECK(!FLAG_vector_stores ||
-         !AreAliased(dictionary, VectorStoreICDescriptor::VectorRegister(),
-                     VectorStoreICDescriptor::SlotRegister()));
+  Register dictionary = rbx;
 
   Label miss;