Vector ICs: platform support for vector-based stores.

src/ic/mips64/ic-compiler-mips64.cc

Index: src/ic/mips64/ic-compiler-mips64.cc
diff --git a/src/ic/mips64/ic-compiler-mips64.cc b/src/ic/mips64/ic-compiler-mips64.cc
index a834430e1e45b5dc7154cbd0b8d209d6bc95c91f..8cdd8f03bc866b019532810f1beefc8bf8ba0077 100644
--- a/src/ic/mips64/ic-compiler-mips64.cc
+++ b/src/ic/mips64/ic-compiler-mips64.cc
@@ -100,7 +100,10 @@ Handle<Code> PropertyICCompiler::CompileKeyedStorePolymorphic(
       Label next_map;
       __ Branch(&next_map, ne, match, Operand(map_reg));
       Handle<WeakCell> cell = Map::WeakCellForMap(transitioned_maps->at(i));
-      __ LoadWeakValue(transition_map(), cell, &miss);
+      Register transition_map = scratch1();
+      DCHECK(!FLAG_vector_stores &&
+             transition_map.is(StoreTransitionDescriptor::MapRegister()));
+      __ LoadWeakValue(transition_map, cell, &miss);
       __ Jump(handler_stubs->at(i), RelocInfo::CODE_TARGET);
       __ bind(&next_map);
     }