use nothing instead

Update simdloop.jl

base/simdloop.jl

@@ -58,7 +58,7 @@ function compile(x, ivdep)
     (isa(x, Expr) && x.head === :for) || throw(SimdError("for loop expected"))
     length(x.args) == 2 || throw(SimdError("1D for loop expected"))
     check_body!(x)
-
+    ivdepend = ivdep === nothing ? nothing : Symbol("julia.ivdep.end")
     var, range = parse_iteration_space(x.args[1])
     r = gensym("r") # Range value
     j = gensym("i") # Iteration variable for outer loop
@@ -77,7 +77,7 @@ function compile(x, ivdep)
                                 local $var = Base.simd_index($r, $j, $i)
                                 $(x.args[2])        # Body of loop
                                 $i += 1
-                                $(Expr(:loopinfo, Symbol("julia.simdloop"), Symbol("julia.ivdep.end")))  # Mark loop as SIMD loop
+                                $(Expr(:loopinfo, Symbol("julia.simdloop"), ivdepend))  # Mark loop as SIMD loop
                             end
                         end
                     end
@@ -126,7 +126,7 @@ either case, your inner loop should have the following properties to allow vecto
 * No iteration ever waits on a previous iteration to make forward progress.
 """
 macro simd(forloop)
-    esc(compile(forloop, Symbol("julia.ivdep.end")))
+    esc(compile(forloop, nothing))
 end
 
 macro simd(ivdep, forloop)