[fullcodegen] Factor out EmitLoadStoreICSlot from archs.

src/full-codegen/full-codegen.cc

Index: src/full-codegen/full-codegen.cc
diff --git a/src/full-codegen/full-codegen.cc b/src/full-codegen/full-codegen.cc
index 3f18219e2c8619c2d4bee7f84949e3e6cb7b7fc8..e0cdb20ad1d0f548042700e0f40375d163185109 100644
--- a/src/full-codegen/full-codegen.cc
+++ b/src/full-codegen/full-codegen.cc
@@ -1076,6 +1076,10 @@ void FullCodeGenerator::EmitPropertyKey(ObjectLiteralProperty* property,
   PushOperand(result_register());
 }
 
+void FullCodeGenerator::EmitLoadStoreICSlot(FeedbackVectorSlot slot) {
+  DCHECK(!slot.IsInvalid());
+  __ Move(VectorStoreICTrampolineDescriptor::SlotRegister(), SmiFromSlot(slot));
+}
 
 void FullCodeGenerator::VisitReturnStatement(ReturnStatement* stmt) {
   Comment cmnt(masm_, "[ ReturnStatement");