assigning a constant

[jaakkor2]

function f1a()
   A = zeros(8)
   @avx for i in 1:size(A)[1]
      A[i] = 1.0
   end
   return A
end

gives

ERROR: BoundsError: attempt to access ()
  at index [1]
Stacktrace:
 [1] getindex(::Tuple, ::Int64) at .\tuple.jl:24
 [2] sizeofeltypes(::Tuple{}, ::Int64) at C:\Users\jr\.julia\packages\LoopVectorization\9Qgzg\src\reconstruct_loopset.jl:204
 [3] avx_body(::Tuple{Int8,Int8,Int8}, ::Array{LoopVectorization.Instruction,1}, ::Array{LoopVectorization.OperationStruct,1}, ::Array{LoopVectorization.ArrayRefStruct,1}, ::Core.SimpleVector, ::Core.SimpleVector, ::Tuple{}) at C:\Users\jr\.julia\packages\LoopVectorization\9Qgzg\src\reconstruct_loopset.jl:215
 [4] #s41#61 at C:\Users\jr\.julia\packages\LoopVectorization\9Qgzg\src\reconstruct_loopset.jl:236 [inlined]
 [5] #s41#61(::Any, ::Any, ::Any, ::Any, ::Any, ::Any, ::Type, ::Type, ::Type, ::Any, ::Any, ::Any) at .\none:0
 [6] (::Core.GeneratedFunctionStub)(::Any, ::Vararg{Any,N} where N) at .\boot.jl:524
 [7] f1a() at .\REPL[10]:3
 [8] top-level scope at REPL[11]:1

I do not know why I would write code like this, but the problem is mainly that the error message was difficult to understand that assigning a constant is not supported.

[chriselrod]

I do not know why I would write code like this

If you mean to say that you think it's silly to use @avx for such a simple loop, then it is also all the sillier for it not to work.

I'd also much rather have code work than give an informative error message.

Fixed and added to the tests.