SIMD plumbing

runtime/vm/raw_object_snapshot.cc

Index: runtime/vm/raw_object_snapshot.cc
diff --git a/runtime/vm/raw_object_snapshot.cc b/runtime/vm/raw_object_snapshot.cc
index dcecda69ca8ebfe284413d23f1c677cf25051550..020eb8c0a0aa11961a4ddc6ede7155933d97551d 100644
--- a/runtime/vm/raw_object_snapshot.cc
+++ b/runtime/vm/raw_object_snapshot.cc
@@ -2261,13 +2261,13 @@ RawFloat32x4Array* Float32x4Array::ReadFrom(SnapshotReader* reader,
   result.set_tags(tags);
 
   // Setup the array elements.
-  float v[4];
+  simd128_value_t v;
   for (intptr_t i = 0; i < len; ++i) {
-    v[0] = reader->Read<float>();
-    v[1] = reader->Read<float>();
-    v[2] = reader->Read<float>();
-    v[3] = reader->Read<float>();
-    result.SetAt(i, simd_value_safe_load(&v[0]));
+    v.storage[0] = reader->Read<float>();
+    v.storage[1] = reader->Read<float>();
+    v.storage[2] = reader->Read<float>();
+    v.storage[3] = reader->Read<float>();
+    result.SetAt(i, v);
   }
   return result.raw();
 }
@@ -2293,7 +2293,7 @@ RawExternal##name##Array* External##name##Array::ReadFrom(                     \
 }                                                                              \
 
 BYTEARRAY_TYPE_LIST(EXTERNALARRAY_READ_FROM)
-EXTERNALARRAY_READ_FROM(Float32x4, Float32x4, simd_value_t)
+EXTERNALARRAY_READ_FROM(Float32x4, Float32x4, simd128_value_t)
 #undef EXTERNALARRAY_READ_FROM