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

src/ic/mips/access-compiler-mips.cc

Index: src/ic/mips/access-compiler-mips.cc
diff --git a/src/ic/mips/access-compiler-mips.cc b/src/ic/mips/access-compiler-mips.cc
index 9aba385497be89af1f8b9d9944911b72c18e597c..f2f6c62c716bbd740207d6eb6839e06cdf52e62c 100644
--- a/src/ic/mips/access-compiler-mips.cc
+++ b/src/ic/mips/access-compiler-mips.cc
@@ -31,7 +31,7 @@ Register* PropertyAccessCompiler::store_calling_convention() {
   // receiver, name, scratch1, scratch2, scratch3.
   Register receiver = StoreDescriptor::ReceiverRegister();
   Register name = StoreDescriptor::NameRegister();
-  DCHECK(a3.is(StoreTransitionDescriptor::MapRegister()));
+  DCHECK(FLAG_vector_stores || a3.is(StoreTransitionDescriptor::MapRegister()));
   static Register registers[] = {receiver, name, a3, t0, t1};
   return registers;
 }