X87: Reland Vector ICs: platform support for vector-based stores.

src/ic/x87/ic-compiler-x87.cc

Index: src/ic/x87/ic-compiler-x87.cc
diff --git a/src/ic/x87/ic-compiler-x87.cc b/src/ic/x87/ic-compiler-x87.cc
index 4d5fc6a7121c754ad519fac7b78ebb6a5f531205..d29e32108b6f70d0e93ebf4c32ba309e2c260e0f 100644
--- a/src/ic/x87/ic-compiler-x87.cc
+++ b/src/ic/x87/ic-compiler-x87.cc
@@ -112,7 +112,10 @@ Handle<Code> PropertyICCompiler::CompileKeyedStorePolymorphic(
       Label next_map;
       __ j(not_equal, &next_map, Label::kNear);
       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);
       __ jmp(handler_stubs->at(i), RelocInfo::CODE_TARGET);
       __ bind(&next_map);
     }