fix #438 because can_turbo literal_pow

Author: chriselrod

Project.toml

@@ -1,7 +1,7 @@
 name = "LoopVectorization"
 uuid = "bdcacae8-1622-11e9-2a5c-532679323890"
 authors = ["Chris Elrod <[email protected]>"]
-version = "0.12.132"
+version = "0.12.133"
 
 [deps]
 ArrayInterface = "4fba245c-0d91-5ea0-9b3e-6abc04ee57a9"

src/condense_loopset.jl

@@ -919,6 +919,7 @@ can_turbo(::typeof(vfmsubadd), ::Val{3}) = true
 can_turbo(::typeof(ifelse), ::Val{3}) = true
 can_turbo(::typeof(!), ::Val{1}) = true
 can_turbo(::typeof(^), ::Val{2}) = true
+can_turbo(::typeof(Base.literal_pow), ::Val{3}) = true
 
 """
     check_turbo_safe(ls::LoopSet)